| @@ -1,1213 +1,1213 @@ | | | @@ -1,1213 +1,1213 @@ |
1 | /* $NetBSD: pmap.c,v 1.216 2010/11/02 06:33:22 uebayasi Exp $ */ | | 1 | /* $NetBSD: pmap.c,v 1.217 2010/11/03 16:59:19 uebayasi Exp $ */ |
2 | | | 2 | |
3 | /* | | 3 | /* |
4 | * Copyright 2003 Wasabi Systems, Inc. | | 4 | * Copyright 2003 Wasabi Systems, Inc. |
5 | * All rights reserved. | | 5 | * All rights reserved. |
6 | * | | 6 | * |
7 | * Written by Steve C. Woodford for Wasabi Systems, Inc. | | 7 | * Written by Steve C. Woodford for Wasabi Systems, Inc. |
8 | * | | 8 | * |
9 | * Redistribution and use in source and binary forms, with or without | | 9 | * Redistribution and use in source and binary forms, with or without |
10 | * modification, are permitted provided that the following conditions | | 10 | * modification, are permitted provided that the following conditions |
11 | * are met: | | 11 | * are met: |
12 | * 1. Redistributions of source code must retain the above copyright | | 12 | * 1. Redistributions of source code must retain the above copyright |
13 | * notice, this list of conditions and the following disclaimer. | | 13 | * notice, this list of conditions and the following disclaimer. |
14 | * 2. Redistributions in binary form must reproduce the above copyright | | 14 | * 2. Redistributions in binary form must reproduce the above copyright |
15 | * notice, this list of conditions and the following disclaimer in the | | 15 | * notice, this list of conditions and the following disclaimer in the |
16 | * documentation and/or other materials provided with the distribution. | | 16 | * documentation and/or other materials provided with the distribution. |
17 | * 3. All advertising materials mentioning features or use of this software | | 17 | * 3. All advertising materials mentioning features or use of this software |
18 | * must display the following acknowledgement: | | 18 | * must display the following acknowledgement: |
19 | * This product includes software developed for the NetBSD Project by | | 19 | * This product includes software developed for the NetBSD Project by |
20 | * Wasabi Systems, Inc. | | 20 | * Wasabi Systems, Inc. |
21 | * 4. The name of Wasabi Systems, Inc. may not be used to endorse | | 21 | * 4. The name of Wasabi Systems, Inc. may not be used to endorse |
22 | * or promote products derived from this software without specific prior | | 22 | * or promote products derived from this software without specific prior |
23 | * written permission. | | 23 | * written permission. |
24 | * | | 24 | * |
25 | * THIS SOFTWARE IS PROVIDED BY WASABI SYSTEMS, INC. ``AS IS'' AND | | 25 | * THIS SOFTWARE IS PROVIDED BY WASABI SYSTEMS, INC. ``AS IS'' AND |
26 | * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED | | 26 | * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED |
27 | * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR | | 27 | * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR |
28 | * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL WASABI SYSTEMS, INC | | 28 | * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL WASABI SYSTEMS, INC |
29 | * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR | | 29 | * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR |
30 | * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF | | 30 | * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF |
31 | * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS | | 31 | * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS |
32 | * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN | | 32 | * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN |
33 | * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) | | 33 | * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) |
34 | * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE | | 34 | * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE |
35 | * POSSIBILITY OF SUCH DAMAGE. | | 35 | * POSSIBILITY OF SUCH DAMAGE. |
36 | */ | | 36 | */ |
37 | | | 37 | |
38 | /* | | 38 | /* |
39 | * Copyright (c) 2002-2003 Wasabi Systems, Inc. | | 39 | * Copyright (c) 2002-2003 Wasabi Systems, Inc. |
40 | * Copyright (c) 2001 Richard Earnshaw | | 40 | * Copyright (c) 2001 Richard Earnshaw |
41 | * Copyright (c) 2001-2002 Christopher Gilbert | | 41 | * Copyright (c) 2001-2002 Christopher Gilbert |
42 | * All rights reserved. | | 42 | * All rights reserved. |
43 | * | | 43 | * |
44 | * 1. Redistributions of source code must retain the above copyright | | 44 | * 1. Redistributions of source code must retain the above copyright |
45 | * notice, this list of conditions and the following disclaimer. | | 45 | * notice, this list of conditions and the following disclaimer. |
46 | * 2. Redistributions in binary form must reproduce the above copyright | | 46 | * 2. Redistributions in binary form must reproduce the above copyright |
47 | * notice, this list of conditions and the following disclaimer in the | | 47 | * notice, this list of conditions and the following disclaimer in the |
48 | * documentation and/or other materials provided with the distribution. | | 48 | * documentation and/or other materials provided with the distribution. |
49 | * 3. The name of the company nor the name of the author may be used to | | 49 | * 3. The name of the company nor the name of the author may be used to |
50 | * endorse or promote products derived from this software without specific | | 50 | * endorse or promote products derived from this software without specific |
51 | * prior written permission. | | 51 | * prior written permission. |
52 | * | | 52 | * |
53 | * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED | | 53 | * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED |
54 | * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF | | 54 | * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF |
55 | * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. | | 55 | * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. |
56 | * IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, | | 56 | * IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, |
57 | * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES | | 57 | * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES |
58 | * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR | | 58 | * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR |
59 | * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) | | 59 | * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) |
60 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT | | 60 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT |
61 | * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY | | 61 | * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY |
62 | * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF | | 62 | * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF |
63 | * SUCH DAMAGE. | | 63 | * SUCH DAMAGE. |
64 | */ | | 64 | */ |
65 | | | 65 | |
66 | /*- | | 66 | /*- |
67 | * Copyright (c) 1999 The NetBSD Foundation, Inc. | | 67 | * Copyright (c) 1999 The NetBSD Foundation, Inc. |
68 | * All rights reserved. | | 68 | * All rights reserved. |
69 | * | | 69 | * |
70 | * This code is derived from software contributed to The NetBSD Foundation | | 70 | * This code is derived from software contributed to The NetBSD Foundation |
71 | * by Charles M. Hannum. | | 71 | * by Charles M. Hannum. |
72 | * | | 72 | * |
73 | * Redistribution and use in source and binary forms, with or without | | 73 | * Redistribution and use in source and binary forms, with or without |
74 | * modification, are permitted provided that the following conditions | | 74 | * modification, are permitted provided that the following conditions |
75 | * are met: | | 75 | * are met: |
76 | * 1. Redistributions of source code must retain the above copyright | | 76 | * 1. Redistributions of source code must retain the above copyright |
77 | * notice, this list of conditions and the following disclaimer. | | 77 | * notice, this list of conditions and the following disclaimer. |
78 | * 2. Redistributions in binary form must reproduce the above copyright | | 78 | * 2. Redistributions in binary form must reproduce the above copyright |
79 | * notice, this list of conditions and the following disclaimer in the | | 79 | * notice, this list of conditions and the following disclaimer in the |
80 | * documentation and/or other materials provided with the distribution. | | 80 | * documentation and/or other materials provided with the distribution. |
81 | * | | 81 | * |
82 | * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS | | 82 | * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS |
83 | * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED | | 83 | * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED |
84 | * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR | | 84 | * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR |
85 | * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS | | 85 | * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS |
86 | * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR | | 86 | * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR |
87 | * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF | | 87 | * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF |
88 | * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS | | 88 | * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS |
89 | * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN | | 89 | * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN |
90 | * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) | | 90 | * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) |
91 | * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE | | 91 | * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE |
92 | * POSSIBILITY OF SUCH DAMAGE. | | 92 | * POSSIBILITY OF SUCH DAMAGE. |
93 | */ | | 93 | */ |
94 | | | 94 | |
95 | /* | | 95 | /* |
96 | * Copyright (c) 1994-1998 Mark Brinicombe. | | 96 | * Copyright (c) 1994-1998 Mark Brinicombe. |
97 | * Copyright (c) 1994 Brini. | | 97 | * Copyright (c) 1994 Brini. |
98 | * All rights reserved. | | 98 | * All rights reserved. |
99 | * | | 99 | * |
100 | * This code is derived from software written for Brini by Mark Brinicombe | | 100 | * This code is derived from software written for Brini by Mark Brinicombe |
101 | * | | 101 | * |
102 | * Redistribution and use in source and binary forms, with or without | | 102 | * Redistribution and use in source and binary forms, with or without |
103 | * modification, are permitted provided that the following conditions | | 103 | * modification, are permitted provided that the following conditions |
104 | * are met: | | 104 | * are met: |
105 | * 1. Redistributions of source code must retain the above copyright | | 105 | * 1. Redistributions of source code must retain the above copyright |
106 | * notice, this list of conditions and the following disclaimer. | | 106 | * notice, this list of conditions and the following disclaimer. |
107 | * 2. Redistributions in binary form must reproduce the above copyright | | 107 | * 2. Redistributions in binary form must reproduce the above copyright |
108 | * notice, this list of conditions and the following disclaimer in the | | 108 | * notice, this list of conditions and the following disclaimer in the |
109 | * documentation and/or other materials provided with the distribution. | | 109 | * documentation and/or other materials provided with the distribution. |
110 | * 3. All advertising materials mentioning features or use of this software | | 110 | * 3. All advertising materials mentioning features or use of this software |
111 | * must display the following acknowledgement: | | 111 | * must display the following acknowledgement: |
112 | * This product includes software developed by Mark Brinicombe. | | 112 | * This product includes software developed by Mark Brinicombe. |
113 | * 4. The name of the author may not be used to endorse or promote products | | 113 | * 4. The name of the author may not be used to endorse or promote products |
114 | * derived from this software without specific prior written permission. | | 114 | * derived from this software without specific prior written permission. |
115 | * | | 115 | * |
116 | * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR | | 116 | * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR |
117 | * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES | | 117 | * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES |
118 | * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. | | 118 | * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. |
119 | * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, | | 119 | * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, |
120 | * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT | | 120 | * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT |
121 | * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, | | 121 | * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
122 | * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY | | 122 | * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
123 | * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT | | 123 | * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
124 | * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF | | 124 | * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF |
125 | * | | 125 | * |
126 | * RiscBSD kernel project | | 126 | * RiscBSD kernel project |
127 | * | | 127 | * |
128 | * pmap.c | | 128 | * pmap.c |
129 | * | | 129 | * |
130 | * Machine dependant vm stuff | | 130 | * Machine dependant vm stuff |
131 | * | | 131 | * |
132 | * Created : 20/09/94 | | 132 | * Created : 20/09/94 |
133 | */ | | 133 | */ |
134 | | | 134 | |
135 | /* | | 135 | /* |
136 | * armv6 and VIPT cache support by 3am Software Foundry, | | 136 | * armv6 and VIPT cache support by 3am Software Foundry, |
137 | * Copyright (c) 2007 Microsoft | | 137 | * Copyright (c) 2007 Microsoft |
138 | */ | | 138 | */ |
139 | | | 139 | |
140 | /* | | 140 | /* |
141 | * Performance improvements, UVM changes, overhauls and part-rewrites | | 141 | * Performance improvements, UVM changes, overhauls and part-rewrites |
142 | * were contributed by Neil A. Carson <neil@causality.com>. | | 142 | * were contributed by Neil A. Carson <neil@causality.com>. |
143 | */ | | 143 | */ |
144 | | | 144 | |
145 | /* | | 145 | /* |
146 | * Overhauled again to speedup the pmap, use MMU Domains so that L1 tables | | 146 | * Overhauled again to speedup the pmap, use MMU Domains so that L1 tables |
147 | * can be shared, and re-work the KVM layout, by Steve Woodford of Wasabi | | 147 | * can be shared, and re-work the KVM layout, by Steve Woodford of Wasabi |
148 | * Systems, Inc. | | 148 | * Systems, Inc. |
149 | * | | 149 | * |
150 | * There are still a few things outstanding at this time: | | 150 | * There are still a few things outstanding at this time: |
151 | * | | 151 | * |
152 | * - There are some unresolved issues for MP systems: | | 152 | * - There are some unresolved issues for MP systems: |
153 | * | | 153 | * |
154 | * o The L1 metadata needs a lock, or more specifically, some places | | 154 | * o The L1 metadata needs a lock, or more specifically, some places |
155 | * need to acquire an exclusive lock when modifying L1 translation | | 155 | * need to acquire an exclusive lock when modifying L1 translation |
156 | * table entries. | | 156 | * table entries. |
157 | * | | 157 | * |
158 | * o When one cpu modifies an L1 entry, and that L1 table is also | | 158 | * o When one cpu modifies an L1 entry, and that L1 table is also |
159 | * being used by another cpu, then the latter will need to be told | | 159 | * being used by another cpu, then the latter will need to be told |
160 | * that a tlb invalidation may be necessary. (But only if the old | | 160 | * that a tlb invalidation may be necessary. (But only if the old |
161 | * domain number in the L1 entry being over-written is currently | | 161 | * domain number in the L1 entry being over-written is currently |
162 | * the active domain on that cpu). I guess there are lots more tlb | | 162 | * the active domain on that cpu). I guess there are lots more tlb |
163 | * shootdown issues too... | | 163 | * shootdown issues too... |
164 | * | | 164 | * |
165 | * o If the vector_page is at 0x00000000 instead of 0xffff0000, then | | 165 | * o If the vector_page is at 0x00000000 instead of 0xffff0000, then |
166 | * MP systems will lose big-time because of the MMU domain hack. | | 166 | * MP systems will lose big-time because of the MMU domain hack. |
167 | * The only way this can be solved (apart from moving the vector | | 167 | * The only way this can be solved (apart from moving the vector |
168 | * page to 0xffff0000) is to reserve the first 1MB of user address | | 168 | * page to 0xffff0000) is to reserve the first 1MB of user address |
169 | * space for kernel use only. This would require re-linking all | | 169 | * space for kernel use only. This would require re-linking all |
170 | * applications so that the text section starts above this 1MB | | 170 | * applications so that the text section starts above this 1MB |
171 | * boundary. | | 171 | * boundary. |
172 | * | | 172 | * |
173 | * o Tracking which VM space is resident in the cache/tlb has not yet | | 173 | * o Tracking which VM space is resident in the cache/tlb has not yet |
174 | * been implemented for MP systems. | | 174 | * been implemented for MP systems. |
175 | * | | 175 | * |
176 | * o Finally, there is a pathological condition where two cpus running | | 176 | * o Finally, there is a pathological condition where two cpus running |
177 | * two separate processes (not lwps) which happen to share an L1 | | 177 | * two separate processes (not lwps) which happen to share an L1 |
178 | * can get into a fight over one or more L1 entries. This will result | | 178 | * can get into a fight over one or more L1 entries. This will result |
179 | * in a significant slow-down if both processes are in tight loops. | | 179 | * in a significant slow-down if both processes are in tight loops. |
180 | */ | | 180 | */ |
181 | | | 181 | |
182 | /* | | 182 | /* |
183 | * Special compilation symbols | | 183 | * Special compilation symbols |
184 | * PMAP_DEBUG - Build in pmap_debug_level code | | 184 | * PMAP_DEBUG - Build in pmap_debug_level code |
185 | */ | | 185 | */ |
186 | | | 186 | |
187 | /* Include header files */ | | 187 | /* Include header files */ |
188 | | | 188 | |
189 | #include "opt_cpuoptions.h" | | 189 | #include "opt_cpuoptions.h" |
190 | #include "opt_pmap_debug.h" | | 190 | #include "opt_pmap_debug.h" |
191 | #include "opt_ddb.h" | | 191 | #include "opt_ddb.h" |
192 | #include "opt_lockdebug.h" | | 192 | #include "opt_lockdebug.h" |
193 | #include "opt_multiprocessor.h" | | 193 | #include "opt_multiprocessor.h" |
194 | | | 194 | |
195 | #include <sys/param.h> | | 195 | #include <sys/param.h> |
196 | #include <sys/types.h> | | 196 | #include <sys/types.h> |
197 | #include <sys/kernel.h> | | 197 | #include <sys/kernel.h> |
198 | #include <sys/systm.h> | | 198 | #include <sys/systm.h> |
199 | #include <sys/proc.h> | | 199 | #include <sys/proc.h> |
200 | #include <sys/malloc.h> | | 200 | #include <sys/malloc.h> |
201 | #include <sys/pool.h> | | 201 | #include <sys/pool.h> |
202 | #include <sys/cdefs.h> | | 202 | #include <sys/cdefs.h> |
203 | #include <sys/cpu.h> | | 203 | #include <sys/cpu.h> |
204 | #include <sys/sysctl.h> | | 204 | #include <sys/sysctl.h> |
205 | | | 205 | |
206 | #include <uvm/uvm.h> | | 206 | #include <uvm/uvm.h> |
207 | | | 207 | |
208 | #include <machine/bus.h> | | 208 | #include <machine/bus.h> |
209 | #include <machine/pmap.h> | | 209 | #include <machine/pmap.h> |
210 | #include <machine/pcb.h> | | 210 | #include <machine/pcb.h> |
211 | #include <machine/param.h> | | 211 | #include <machine/param.h> |
212 | #include <arm/arm32/katelib.h> | | 212 | #include <arm/arm32/katelib.h> |
213 | | | 213 | |
214 | __KERNEL_RCSID(0, "$NetBSD: pmap.c,v 1.216 2010/11/02 06:33:22 uebayasi Exp $"); | | 214 | __KERNEL_RCSID(0, "$NetBSD: pmap.c,v 1.217 2010/11/03 16:59:19 uebayasi Exp $"); |
215 | | | 215 | |
216 | #define VM_PAGE_TO_MD(pg) (&(pg)->mdpage) | | 216 | #define VM_PAGE_TO_MD(pg) (&(pg)->mdpage) |
217 | | | 217 | |
218 | #ifdef PMAP_DEBUG | | 218 | #ifdef PMAP_DEBUG |
219 | | | 219 | |
220 | /* XXX need to get rid of all refs to this */ | | 220 | /* XXX need to get rid of all refs to this */ |
221 | int pmap_debug_level = 0; | | 221 | int pmap_debug_level = 0; |
222 | | | 222 | |
223 | /* | | 223 | /* |
224 | * for switching to potentially finer grained debugging | | 224 | * for switching to potentially finer grained debugging |
225 | */ | | 225 | */ |
226 | #define PDB_FOLLOW 0x0001 | | 226 | #define PDB_FOLLOW 0x0001 |
227 | #define PDB_INIT 0x0002 | | 227 | #define PDB_INIT 0x0002 |
228 | #define PDB_ENTER 0x0004 | | 228 | #define PDB_ENTER 0x0004 |
229 | #define PDB_REMOVE 0x0008 | | 229 | #define PDB_REMOVE 0x0008 |
230 | #define PDB_CREATE 0x0010 | | 230 | #define PDB_CREATE 0x0010 |
231 | #define PDB_PTPAGE 0x0020 | | 231 | #define PDB_PTPAGE 0x0020 |
232 | #define PDB_GROWKERN 0x0040 | | 232 | #define PDB_GROWKERN 0x0040 |
233 | #define PDB_BITS 0x0080 | | 233 | #define PDB_BITS 0x0080 |
234 | #define PDB_COLLECT 0x0100 | | 234 | #define PDB_COLLECT 0x0100 |
235 | #define PDB_PROTECT 0x0200 | | 235 | #define PDB_PROTECT 0x0200 |
236 | #define PDB_MAP_L1 0x0400 | | 236 | #define PDB_MAP_L1 0x0400 |
237 | #define PDB_BOOTSTRAP 0x1000 | | 237 | #define PDB_BOOTSTRAP 0x1000 |
238 | #define PDB_PARANOIA 0x2000 | | 238 | #define PDB_PARANOIA 0x2000 |
239 | #define PDB_WIRING 0x4000 | | 239 | #define PDB_WIRING 0x4000 |
240 | #define PDB_PVDUMP 0x8000 | | 240 | #define PDB_PVDUMP 0x8000 |
241 | #define PDB_VAC 0x10000 | | 241 | #define PDB_VAC 0x10000 |
242 | #define PDB_KENTER 0x20000 | | 242 | #define PDB_KENTER 0x20000 |
243 | #define PDB_KREMOVE 0x40000 | | 243 | #define PDB_KREMOVE 0x40000 |
244 | #define PDB_EXEC 0x80000 | | 244 | #define PDB_EXEC 0x80000 |
245 | | | 245 | |
246 | int debugmap = 1; | | 246 | int debugmap = 1; |
247 | int pmapdebug = 0; | | 247 | int pmapdebug = 0; |
248 | #define NPDEBUG(_lev_,_stat_) \ | | 248 | #define NPDEBUG(_lev_,_stat_) \ |
249 | if (pmapdebug & (_lev_)) \ | | 249 | if (pmapdebug & (_lev_)) \ |
250 | ((_stat_)) | | 250 | ((_stat_)) |
251 | | | 251 | |
252 | #else /* PMAP_DEBUG */ | | 252 | #else /* PMAP_DEBUG */ |
253 | #define NPDEBUG(_lev_,_stat_) /* Nothing */ | | 253 | #define NPDEBUG(_lev_,_stat_) /* Nothing */ |
254 | #endif /* PMAP_DEBUG */ | | 254 | #endif /* PMAP_DEBUG */ |
255 | | | 255 | |
256 | /* | | 256 | /* |
257 | * pmap_kernel() points here | | 257 | * pmap_kernel() points here |
258 | */ | | 258 | */ |
259 | static struct pmap kernel_pmap_store; | | 259 | static struct pmap kernel_pmap_store; |
260 | struct pmap *const kernel_pmap_ptr = &kernel_pmap_store; | | 260 | struct pmap *const kernel_pmap_ptr = &kernel_pmap_store; |
261 | | | 261 | |
262 | /* | | 262 | /* |
263 | * Which pmap is currently 'live' in the cache | | 263 | * Which pmap is currently 'live' in the cache |
264 | * | | 264 | * |
265 | * XXXSCW: Fix for SMP ... | | 265 | * XXXSCW: Fix for SMP ... |
266 | */ | | 266 | */ |
267 | static pmap_t pmap_recent_user; | | 267 | static pmap_t pmap_recent_user; |
268 | | | 268 | |
269 | /* | | 269 | /* |
270 | * Pointer to last active lwp, or NULL if it exited. | | 270 | * Pointer to last active lwp, or NULL if it exited. |
271 | */ | | 271 | */ |
272 | struct lwp *pmap_previous_active_lwp; | | 272 | struct lwp *pmap_previous_active_lwp; |
273 | | | 273 | |
274 | /* | | 274 | /* |
275 | * Pool and cache that pmap structures are allocated from. | | 275 | * Pool and cache that pmap structures are allocated from. |
276 | * We use a cache to avoid clearing the pm_l2[] array (1KB) | | 276 | * We use a cache to avoid clearing the pm_l2[] array (1KB) |
277 | * in pmap_create(). | | 277 | * in pmap_create(). |
278 | */ | | 278 | */ |
279 | static struct pool_cache pmap_cache; | | 279 | static struct pool_cache pmap_cache; |
280 | static LIST_HEAD(, pmap) pmap_pmaps; | | 280 | static LIST_HEAD(, pmap) pmap_pmaps; |
281 | | | 281 | |
282 | /* | | 282 | /* |
283 | * Pool of PV structures | | 283 | * Pool of PV structures |
284 | */ | | 284 | */ |
285 | static struct pool pmap_pv_pool; | | 285 | static struct pool pmap_pv_pool; |
286 | static void *pmap_bootstrap_pv_page_alloc(struct pool *, int); | | 286 | static void *pmap_bootstrap_pv_page_alloc(struct pool *, int); |
287 | static void pmap_bootstrap_pv_page_free(struct pool *, void *); | | 287 | static void pmap_bootstrap_pv_page_free(struct pool *, void *); |
288 | static struct pool_allocator pmap_bootstrap_pv_allocator = { | | 288 | static struct pool_allocator pmap_bootstrap_pv_allocator = { |
289 | pmap_bootstrap_pv_page_alloc, pmap_bootstrap_pv_page_free | | 289 | pmap_bootstrap_pv_page_alloc, pmap_bootstrap_pv_page_free |
290 | }; | | 290 | }; |
291 | | | 291 | |
292 | /* | | 292 | /* |
293 | * Pool and cache of l2_dtable structures. | | 293 | * Pool and cache of l2_dtable structures. |
294 | * We use a cache to avoid clearing the structures when they're | | 294 | * We use a cache to avoid clearing the structures when they're |
295 | * allocated. (196 bytes) | | 295 | * allocated. (196 bytes) |
296 | */ | | 296 | */ |
297 | static struct pool_cache pmap_l2dtable_cache; | | 297 | static struct pool_cache pmap_l2dtable_cache; |
298 | static vaddr_t pmap_kernel_l2dtable_kva; | | 298 | static vaddr_t pmap_kernel_l2dtable_kva; |
299 | | | 299 | |
300 | /* | | 300 | /* |
301 | * Pool and cache of L2 page descriptors. | | 301 | * Pool and cache of L2 page descriptors. |
302 | * We use a cache to avoid clearing the descriptor table | | 302 | * We use a cache to avoid clearing the descriptor table |
303 | * when they're allocated. (1KB) | | 303 | * when they're allocated. (1KB) |
304 | */ | | 304 | */ |
305 | static struct pool_cache pmap_l2ptp_cache; | | 305 | static struct pool_cache pmap_l2ptp_cache; |
306 | static vaddr_t pmap_kernel_l2ptp_kva; | | 306 | static vaddr_t pmap_kernel_l2ptp_kva; |
307 | static paddr_t pmap_kernel_l2ptp_phys; | | 307 | static paddr_t pmap_kernel_l2ptp_phys; |
308 | | | 308 | |
309 | #ifdef PMAPCOUNTERS | | 309 | #ifdef PMAPCOUNTERS |
310 | #define PMAP_EVCNT_INITIALIZER(name) \ | | 310 | #define PMAP_EVCNT_INITIALIZER(name) \ |
311 | EVCNT_INITIALIZER(EVCNT_TYPE_MISC, NULL, "pmap", name) | | 311 | EVCNT_INITIALIZER(EVCNT_TYPE_MISC, NULL, "pmap", name) |
312 | | | 312 | |
313 | #ifdef PMAP_CACHE_VIPT | | 313 | #ifdef PMAP_CACHE_VIPT |
314 | static struct evcnt pmap_ev_vac_clean_one = | | 314 | static struct evcnt pmap_ev_vac_clean_one = |
315 | PMAP_EVCNT_INITIALIZER("clean page (1 color)"); | | 315 | PMAP_EVCNT_INITIALIZER("clean page (1 color)"); |
316 | static struct evcnt pmap_ev_vac_flush_one = | | 316 | static struct evcnt pmap_ev_vac_flush_one = |
317 | PMAP_EVCNT_INITIALIZER("flush page (1 color)"); | | 317 | PMAP_EVCNT_INITIALIZER("flush page (1 color)"); |
318 | static struct evcnt pmap_ev_vac_flush_lots = | | 318 | static struct evcnt pmap_ev_vac_flush_lots = |
319 | PMAP_EVCNT_INITIALIZER("flush page (2+ colors)"); | | 319 | PMAP_EVCNT_INITIALIZER("flush page (2+ colors)"); |
320 | static struct evcnt pmap_ev_vac_flush_lots2 = | | 320 | static struct evcnt pmap_ev_vac_flush_lots2 = |
321 | PMAP_EVCNT_INITIALIZER("flush page (2+ colors, kmpage)"); | | 321 | PMAP_EVCNT_INITIALIZER("flush page (2+ colors, kmpage)"); |
322 | EVCNT_ATTACH_STATIC(pmap_ev_vac_clean_one); | | 322 | EVCNT_ATTACH_STATIC(pmap_ev_vac_clean_one); |
323 | EVCNT_ATTACH_STATIC(pmap_ev_vac_flush_one); | | 323 | EVCNT_ATTACH_STATIC(pmap_ev_vac_flush_one); |
324 | EVCNT_ATTACH_STATIC(pmap_ev_vac_flush_lots); | | 324 | EVCNT_ATTACH_STATIC(pmap_ev_vac_flush_lots); |
325 | EVCNT_ATTACH_STATIC(pmap_ev_vac_flush_lots2); | | 325 | EVCNT_ATTACH_STATIC(pmap_ev_vac_flush_lots2); |
326 | | | 326 | |
327 | static struct evcnt pmap_ev_vac_color_new = | | 327 | static struct evcnt pmap_ev_vac_color_new = |
328 | PMAP_EVCNT_INITIALIZER("new page color"); | | 328 | PMAP_EVCNT_INITIALIZER("new page color"); |
329 | static struct evcnt pmap_ev_vac_color_reuse = | | 329 | static struct evcnt pmap_ev_vac_color_reuse = |
330 | PMAP_EVCNT_INITIALIZER("ok first page color"); | | 330 | PMAP_EVCNT_INITIALIZER("ok first page color"); |
331 | static struct evcnt pmap_ev_vac_color_ok = | | 331 | static struct evcnt pmap_ev_vac_color_ok = |
332 | PMAP_EVCNT_INITIALIZER("ok page color"); | | 332 | PMAP_EVCNT_INITIALIZER("ok page color"); |
333 | static struct evcnt pmap_ev_vac_color_blind = | | 333 | static struct evcnt pmap_ev_vac_color_blind = |
334 | PMAP_EVCNT_INITIALIZER("blind page color"); | | 334 | PMAP_EVCNT_INITIALIZER("blind page color"); |
335 | static struct evcnt pmap_ev_vac_color_change = | | 335 | static struct evcnt pmap_ev_vac_color_change = |
336 | PMAP_EVCNT_INITIALIZER("change page color"); | | 336 | PMAP_EVCNT_INITIALIZER("change page color"); |
337 | static struct evcnt pmap_ev_vac_color_erase = | | 337 | static struct evcnt pmap_ev_vac_color_erase = |
338 | PMAP_EVCNT_INITIALIZER("erase page color"); | | 338 | PMAP_EVCNT_INITIALIZER("erase page color"); |
339 | static struct evcnt pmap_ev_vac_color_none = | | 339 | static struct evcnt pmap_ev_vac_color_none = |
340 | PMAP_EVCNT_INITIALIZER("no page color"); | | 340 | PMAP_EVCNT_INITIALIZER("no page color"); |
341 | static struct evcnt pmap_ev_vac_color_restore = | | 341 | static struct evcnt pmap_ev_vac_color_restore = |
342 | PMAP_EVCNT_INITIALIZER("restore page color"); | | 342 | PMAP_EVCNT_INITIALIZER("restore page color"); |
343 | | | 343 | |
344 | EVCNT_ATTACH_STATIC(pmap_ev_vac_color_new); | | 344 | EVCNT_ATTACH_STATIC(pmap_ev_vac_color_new); |
345 | EVCNT_ATTACH_STATIC(pmap_ev_vac_color_reuse); | | 345 | EVCNT_ATTACH_STATIC(pmap_ev_vac_color_reuse); |
346 | EVCNT_ATTACH_STATIC(pmap_ev_vac_color_ok); | | 346 | EVCNT_ATTACH_STATIC(pmap_ev_vac_color_ok); |
347 | EVCNT_ATTACH_STATIC(pmap_ev_vac_color_blind); | | 347 | EVCNT_ATTACH_STATIC(pmap_ev_vac_color_blind); |
348 | EVCNT_ATTACH_STATIC(pmap_ev_vac_color_change); | | 348 | EVCNT_ATTACH_STATIC(pmap_ev_vac_color_change); |
349 | EVCNT_ATTACH_STATIC(pmap_ev_vac_color_erase); | | 349 | EVCNT_ATTACH_STATIC(pmap_ev_vac_color_erase); |
350 | EVCNT_ATTACH_STATIC(pmap_ev_vac_color_none); | | 350 | EVCNT_ATTACH_STATIC(pmap_ev_vac_color_none); |
351 | EVCNT_ATTACH_STATIC(pmap_ev_vac_color_restore); | | 351 | EVCNT_ATTACH_STATIC(pmap_ev_vac_color_restore); |
352 | #endif | | 352 | #endif |
353 | | | 353 | |
354 | static struct evcnt pmap_ev_mappings = | | 354 | static struct evcnt pmap_ev_mappings = |
355 | PMAP_EVCNT_INITIALIZER("pages mapped"); | | 355 | PMAP_EVCNT_INITIALIZER("pages mapped"); |
356 | static struct evcnt pmap_ev_unmappings = | | 356 | static struct evcnt pmap_ev_unmappings = |
357 | PMAP_EVCNT_INITIALIZER("pages unmapped"); | | 357 | PMAP_EVCNT_INITIALIZER("pages unmapped"); |
358 | static struct evcnt pmap_ev_remappings = | | 358 | static struct evcnt pmap_ev_remappings = |
359 | PMAP_EVCNT_INITIALIZER("pages remapped"); | | 359 | PMAP_EVCNT_INITIALIZER("pages remapped"); |
360 | | | 360 | |
361 | EVCNT_ATTACH_STATIC(pmap_ev_mappings); | | 361 | EVCNT_ATTACH_STATIC(pmap_ev_mappings); |
362 | EVCNT_ATTACH_STATIC(pmap_ev_unmappings); | | 362 | EVCNT_ATTACH_STATIC(pmap_ev_unmappings); |
363 | EVCNT_ATTACH_STATIC(pmap_ev_remappings); | | 363 | EVCNT_ATTACH_STATIC(pmap_ev_remappings); |
364 | | | 364 | |
365 | static struct evcnt pmap_ev_kernel_mappings = | | 365 | static struct evcnt pmap_ev_kernel_mappings = |
366 | PMAP_EVCNT_INITIALIZER("kernel pages mapped"); | | 366 | PMAP_EVCNT_INITIALIZER("kernel pages mapped"); |
367 | static struct evcnt pmap_ev_kernel_unmappings = | | 367 | static struct evcnt pmap_ev_kernel_unmappings = |
368 | PMAP_EVCNT_INITIALIZER("kernel pages unmapped"); | | 368 | PMAP_EVCNT_INITIALIZER("kernel pages unmapped"); |
369 | static struct evcnt pmap_ev_kernel_remappings = | | 369 | static struct evcnt pmap_ev_kernel_remappings = |
370 | PMAP_EVCNT_INITIALIZER("kernel pages remapped"); | | 370 | PMAP_EVCNT_INITIALIZER("kernel pages remapped"); |
371 | | | 371 | |
372 | EVCNT_ATTACH_STATIC(pmap_ev_kernel_mappings); | | 372 | EVCNT_ATTACH_STATIC(pmap_ev_kernel_mappings); |
373 | EVCNT_ATTACH_STATIC(pmap_ev_kernel_unmappings); | | 373 | EVCNT_ATTACH_STATIC(pmap_ev_kernel_unmappings); |
374 | EVCNT_ATTACH_STATIC(pmap_ev_kernel_remappings); | | 374 | EVCNT_ATTACH_STATIC(pmap_ev_kernel_remappings); |
375 | | | 375 | |
376 | static struct evcnt pmap_ev_kenter_mappings = | | 376 | static struct evcnt pmap_ev_kenter_mappings = |
377 | PMAP_EVCNT_INITIALIZER("kenter pages mapped"); | | 377 | PMAP_EVCNT_INITIALIZER("kenter pages mapped"); |
378 | static struct evcnt pmap_ev_kenter_unmappings = | | 378 | static struct evcnt pmap_ev_kenter_unmappings = |
379 | PMAP_EVCNT_INITIALIZER("kenter pages unmapped"); | | 379 | PMAP_EVCNT_INITIALIZER("kenter pages unmapped"); |
380 | static struct evcnt pmap_ev_kenter_remappings = | | 380 | static struct evcnt pmap_ev_kenter_remappings = |
381 | PMAP_EVCNT_INITIALIZER("kenter pages remapped"); | | 381 | PMAP_EVCNT_INITIALIZER("kenter pages remapped"); |
382 | static struct evcnt pmap_ev_pt_mappings = | | 382 | static struct evcnt pmap_ev_pt_mappings = |
383 | PMAP_EVCNT_INITIALIZER("page table pages mapped"); | | 383 | PMAP_EVCNT_INITIALIZER("page table pages mapped"); |
384 | | | 384 | |
385 | EVCNT_ATTACH_STATIC(pmap_ev_kenter_mappings); | | 385 | EVCNT_ATTACH_STATIC(pmap_ev_kenter_mappings); |
386 | EVCNT_ATTACH_STATIC(pmap_ev_kenter_unmappings); | | 386 | EVCNT_ATTACH_STATIC(pmap_ev_kenter_unmappings); |
387 | EVCNT_ATTACH_STATIC(pmap_ev_kenter_remappings); | | 387 | EVCNT_ATTACH_STATIC(pmap_ev_kenter_remappings); |
388 | EVCNT_ATTACH_STATIC(pmap_ev_pt_mappings); | | 388 | EVCNT_ATTACH_STATIC(pmap_ev_pt_mappings); |
389 | | | 389 | |
390 | #ifdef PMAP_CACHE_VIPT | | 390 | #ifdef PMAP_CACHE_VIPT |
391 | static struct evcnt pmap_ev_exec_mappings = | | 391 | static struct evcnt pmap_ev_exec_mappings = |
392 | PMAP_EVCNT_INITIALIZER("exec pages mapped"); | | 392 | PMAP_EVCNT_INITIALIZER("exec pages mapped"); |
393 | static struct evcnt pmap_ev_exec_cached = | | 393 | static struct evcnt pmap_ev_exec_cached = |
394 | PMAP_EVCNT_INITIALIZER("exec pages cached"); | | 394 | PMAP_EVCNT_INITIALIZER("exec pages cached"); |
395 | | | 395 | |
396 | EVCNT_ATTACH_STATIC(pmap_ev_exec_mappings); | | 396 | EVCNT_ATTACH_STATIC(pmap_ev_exec_mappings); |
397 | EVCNT_ATTACH_STATIC(pmap_ev_exec_cached); | | 397 | EVCNT_ATTACH_STATIC(pmap_ev_exec_cached); |
398 | | | 398 | |
399 | static struct evcnt pmap_ev_exec_synced = | | 399 | static struct evcnt pmap_ev_exec_synced = |
400 | PMAP_EVCNT_INITIALIZER("exec pages synced"); | | 400 | PMAP_EVCNT_INITIALIZER("exec pages synced"); |
401 | static struct evcnt pmap_ev_exec_synced_map = | | 401 | static struct evcnt pmap_ev_exec_synced_map = |
402 | PMAP_EVCNT_INITIALIZER("exec pages synced (MP)"); | | 402 | PMAP_EVCNT_INITIALIZER("exec pages synced (MP)"); |
403 | static struct evcnt pmap_ev_exec_synced_unmap = | | 403 | static struct evcnt pmap_ev_exec_synced_unmap = |
404 | PMAP_EVCNT_INITIALIZER("exec pages synced (UM)"); | | 404 | PMAP_EVCNT_INITIALIZER("exec pages synced (UM)"); |
405 | static struct evcnt pmap_ev_exec_synced_remap = | | 405 | static struct evcnt pmap_ev_exec_synced_remap = |
406 | PMAP_EVCNT_INITIALIZER("exec pages synced (RM)"); | | 406 | PMAP_EVCNT_INITIALIZER("exec pages synced (RM)"); |
407 | static struct evcnt pmap_ev_exec_synced_clearbit = | | 407 | static struct evcnt pmap_ev_exec_synced_clearbit = |
408 | PMAP_EVCNT_INITIALIZER("exec pages synced (DG)"); | | 408 | PMAP_EVCNT_INITIALIZER("exec pages synced (DG)"); |
409 | static struct evcnt pmap_ev_exec_synced_kremove = | | 409 | static struct evcnt pmap_ev_exec_synced_kremove = |
410 | PMAP_EVCNT_INITIALIZER("exec pages synced (KU)"); | | 410 | PMAP_EVCNT_INITIALIZER("exec pages synced (KU)"); |
411 | | | 411 | |
412 | EVCNT_ATTACH_STATIC(pmap_ev_exec_synced); | | 412 | EVCNT_ATTACH_STATIC(pmap_ev_exec_synced); |
413 | EVCNT_ATTACH_STATIC(pmap_ev_exec_synced_map); | | 413 | EVCNT_ATTACH_STATIC(pmap_ev_exec_synced_map); |
414 | EVCNT_ATTACH_STATIC(pmap_ev_exec_synced_unmap); | | 414 | EVCNT_ATTACH_STATIC(pmap_ev_exec_synced_unmap); |
415 | EVCNT_ATTACH_STATIC(pmap_ev_exec_synced_remap); | | 415 | EVCNT_ATTACH_STATIC(pmap_ev_exec_synced_remap); |
416 | EVCNT_ATTACH_STATIC(pmap_ev_exec_synced_clearbit); | | 416 | EVCNT_ATTACH_STATIC(pmap_ev_exec_synced_clearbit); |
417 | EVCNT_ATTACH_STATIC(pmap_ev_exec_synced_kremove); | | 417 | EVCNT_ATTACH_STATIC(pmap_ev_exec_synced_kremove); |
418 | | | 418 | |
419 | static struct evcnt pmap_ev_exec_discarded_unmap = | | 419 | static struct evcnt pmap_ev_exec_discarded_unmap = |
420 | PMAP_EVCNT_INITIALIZER("exec pages discarded (UM)"); | | 420 | PMAP_EVCNT_INITIALIZER("exec pages discarded (UM)"); |
421 | static struct evcnt pmap_ev_exec_discarded_zero = | | 421 | static struct evcnt pmap_ev_exec_discarded_zero = |
422 | PMAP_EVCNT_INITIALIZER("exec pages discarded (ZP)"); | | 422 | PMAP_EVCNT_INITIALIZER("exec pages discarded (ZP)"); |
423 | static struct evcnt pmap_ev_exec_discarded_copy = | | 423 | static struct evcnt pmap_ev_exec_discarded_copy = |
424 | PMAP_EVCNT_INITIALIZER("exec pages discarded (CP)"); | | 424 | PMAP_EVCNT_INITIALIZER("exec pages discarded (CP)"); |
425 | static struct evcnt pmap_ev_exec_discarded_page_protect = | | 425 | static struct evcnt pmap_ev_exec_discarded_page_protect = |
426 | PMAP_EVCNT_INITIALIZER("exec pages discarded (PP)"); | | 426 | PMAP_EVCNT_INITIALIZER("exec pages discarded (PP)"); |
427 | static struct evcnt pmap_ev_exec_discarded_clearbit = | | 427 | static struct evcnt pmap_ev_exec_discarded_clearbit = |
428 | PMAP_EVCNT_INITIALIZER("exec pages discarded (DG)"); | | 428 | PMAP_EVCNT_INITIALIZER("exec pages discarded (DG)"); |
429 | static struct evcnt pmap_ev_exec_discarded_kremove = | | 429 | static struct evcnt pmap_ev_exec_discarded_kremove = |
430 | PMAP_EVCNT_INITIALIZER("exec pages discarded (KU)"); | | 430 | PMAP_EVCNT_INITIALIZER("exec pages discarded (KU)"); |
431 | | | 431 | |
432 | EVCNT_ATTACH_STATIC(pmap_ev_exec_discarded_unmap); | | 432 | EVCNT_ATTACH_STATIC(pmap_ev_exec_discarded_unmap); |
433 | EVCNT_ATTACH_STATIC(pmap_ev_exec_discarded_zero); | | 433 | EVCNT_ATTACH_STATIC(pmap_ev_exec_discarded_zero); |
434 | EVCNT_ATTACH_STATIC(pmap_ev_exec_discarded_copy); | | 434 | EVCNT_ATTACH_STATIC(pmap_ev_exec_discarded_copy); |
435 | EVCNT_ATTACH_STATIC(pmap_ev_exec_discarded_page_protect); | | 435 | EVCNT_ATTACH_STATIC(pmap_ev_exec_discarded_page_protect); |
436 | EVCNT_ATTACH_STATIC(pmap_ev_exec_discarded_clearbit); | | 436 | EVCNT_ATTACH_STATIC(pmap_ev_exec_discarded_clearbit); |
437 | EVCNT_ATTACH_STATIC(pmap_ev_exec_discarded_kremove); | | 437 | EVCNT_ATTACH_STATIC(pmap_ev_exec_discarded_kremove); |
438 | #endif /* PMAP_CACHE_VIPT */ | | 438 | #endif /* PMAP_CACHE_VIPT */ |
439 | | | 439 | |
440 | static struct evcnt pmap_ev_updates = PMAP_EVCNT_INITIALIZER("updates"); | | 440 | static struct evcnt pmap_ev_updates = PMAP_EVCNT_INITIALIZER("updates"); |
441 | static struct evcnt pmap_ev_collects = PMAP_EVCNT_INITIALIZER("collects"); | | 441 | static struct evcnt pmap_ev_collects = PMAP_EVCNT_INITIALIZER("collects"); |
442 | static struct evcnt pmap_ev_activations = PMAP_EVCNT_INITIALIZER("activations"); | | 442 | static struct evcnt pmap_ev_activations = PMAP_EVCNT_INITIALIZER("activations"); |
443 | | | 443 | |
444 | EVCNT_ATTACH_STATIC(pmap_ev_updates); | | 444 | EVCNT_ATTACH_STATIC(pmap_ev_updates); |
445 | EVCNT_ATTACH_STATIC(pmap_ev_collects); | | 445 | EVCNT_ATTACH_STATIC(pmap_ev_collects); |
446 | EVCNT_ATTACH_STATIC(pmap_ev_activations); | | 446 | EVCNT_ATTACH_STATIC(pmap_ev_activations); |
447 | | | 447 | |
448 | #define PMAPCOUNT(x) ((void)(pmap_ev_##x.ev_count++)) | | 448 | #define PMAPCOUNT(x) ((void)(pmap_ev_##x.ev_count++)) |
449 | #else | | 449 | #else |
450 | #define PMAPCOUNT(x) ((void)0) | | 450 | #define PMAPCOUNT(x) ((void)0) |
451 | #endif | | 451 | #endif |
452 | | | 452 | |
453 | /* | | 453 | /* |
454 | * pmap copy/zero page, and mem(5) hook point | | 454 | * pmap copy/zero page, and mem(5) hook point |
455 | */ | | 455 | */ |
456 | static pt_entry_t *csrc_pte, *cdst_pte; | | 456 | static pt_entry_t *csrc_pte, *cdst_pte; |
457 | static vaddr_t csrcp, cdstp; | | 457 | static vaddr_t csrcp, cdstp; |
458 | vaddr_t memhook; /* used by mem.c */ | | 458 | vaddr_t memhook; /* used by mem.c */ |
459 | kmutex_t memlock; /* used by mem.c */ | | 459 | kmutex_t memlock; /* used by mem.c */ |
460 | void *zeropage; /* used by mem.c */ | | 460 | void *zeropage; /* used by mem.c */ |
461 | extern void *msgbufaddr; | | 461 | extern void *msgbufaddr; |
462 | int pmap_kmpages; | | 462 | int pmap_kmpages; |
463 | /* | | 463 | /* |
464 | * Flag to indicate if pmap_init() has done its thing | | 464 | * Flag to indicate if pmap_init() has done its thing |
465 | */ | | 465 | */ |
466 | bool pmap_initialized; | | 466 | bool pmap_initialized; |
467 | | | 467 | |
468 | /* | | 468 | /* |
469 | * Misc. locking data structures | | 469 | * Misc. locking data structures |
470 | */ | | 470 | */ |
471 | | | 471 | |
472 | #if 0 /* defined(MULTIPROCESSOR) || defined(LOCKDEBUG) */ | | 472 | #if 0 /* defined(MULTIPROCESSOR) || defined(LOCKDEBUG) */ |
473 | static struct lock pmap_main_lock; | | 473 | static struct lock pmap_main_lock; |
474 | | | 474 | |
475 | #define PMAP_MAP_TO_HEAD_LOCK() \ | | 475 | #define PMAP_MAP_TO_HEAD_LOCK() \ |
476 | (void) spinlockmgr(&pmap_main_lock, LK_SHARED, NULL) | | 476 | (void) spinlockmgr(&pmap_main_lock, LK_SHARED, NULL) |
477 | #define PMAP_MAP_TO_HEAD_UNLOCK() \ | | 477 | #define PMAP_MAP_TO_HEAD_UNLOCK() \ |
478 | (void) spinlockmgr(&pmap_main_lock, LK_RELEASE, NULL) | | 478 | (void) spinlockmgr(&pmap_main_lock, LK_RELEASE, NULL) |
479 | #define PMAP_HEAD_TO_MAP_LOCK() \ | | 479 | #define PMAP_HEAD_TO_MAP_LOCK() \ |
480 | (void) spinlockmgr(&pmap_main_lock, LK_EXCLUSIVE, NULL) | | 480 | (void) spinlockmgr(&pmap_main_lock, LK_EXCLUSIVE, NULL) |
481 | #define PMAP_HEAD_TO_MAP_UNLOCK() \ | | 481 | #define PMAP_HEAD_TO_MAP_UNLOCK() \ |
482 | spinlockmgr(&pmap_main_lock, LK_RELEASE, (void *) 0) | | 482 | spinlockmgr(&pmap_main_lock, LK_RELEASE, (void *) 0) |
483 | #else | | 483 | #else |
484 | #define PMAP_MAP_TO_HEAD_LOCK() /* null */ | | 484 | #define PMAP_MAP_TO_HEAD_LOCK() /* null */ |
485 | #define PMAP_MAP_TO_HEAD_UNLOCK() /* null */ | | 485 | #define PMAP_MAP_TO_HEAD_UNLOCK() /* null */ |
486 | #define PMAP_HEAD_TO_MAP_LOCK() /* null */ | | 486 | #define PMAP_HEAD_TO_MAP_LOCK() /* null */ |
487 | #define PMAP_HEAD_TO_MAP_UNLOCK() /* null */ | | 487 | #define PMAP_HEAD_TO_MAP_UNLOCK() /* null */ |
488 | #endif | | 488 | #endif |
489 | | | 489 | |
490 | #define pmap_acquire_pmap_lock(pm) \ | | 490 | #define pmap_acquire_pmap_lock(pm) \ |
491 | do { \ | | 491 | do { \ |
492 | if ((pm) != pmap_kernel()) \ | | 492 | if ((pm) != pmap_kernel()) \ |
493 | mutex_enter(&(pm)->pm_lock); \ | | 493 | mutex_enter(&(pm)->pm_lock); \ |
494 | } while (/*CONSTCOND*/0) | | 494 | } while (/*CONSTCOND*/0) |
495 | | | 495 | |
496 | #define pmap_release_pmap_lock(pm) \ | | 496 | #define pmap_release_pmap_lock(pm) \ |
497 | do { \ | | 497 | do { \ |
498 | if ((pm) != pmap_kernel()) \ | | 498 | if ((pm) != pmap_kernel()) \ |
499 | mutex_exit(&(pm)->pm_lock); \ | | 499 | mutex_exit(&(pm)->pm_lock); \ |
500 | } while (/*CONSTCOND*/0) | | 500 | } while (/*CONSTCOND*/0) |
501 | | | 501 | |
502 | | | 502 | |
503 | /* | | 503 | /* |
504 | * Metadata for L1 translation tables. | | 504 | * Metadata for L1 translation tables. |
505 | */ | | 505 | */ |
506 | struct l1_ttable { | | 506 | struct l1_ttable { |
507 | /* Entry on the L1 Table list */ | | 507 | /* Entry on the L1 Table list */ |
508 | SLIST_ENTRY(l1_ttable) l1_link; | | 508 | SLIST_ENTRY(l1_ttable) l1_link; |
509 | | | 509 | |
510 | /* Entry on the L1 Least Recently Used list */ | | 510 | /* Entry on the L1 Least Recently Used list */ |
511 | TAILQ_ENTRY(l1_ttable) l1_lru; | | 511 | TAILQ_ENTRY(l1_ttable) l1_lru; |
512 | | | 512 | |
513 | /* Track how many domains are allocated from this L1 */ | | 513 | /* Track how many domains are allocated from this L1 */ |
514 | volatile u_int l1_domain_use_count; | | 514 | volatile u_int l1_domain_use_count; |
515 | | | 515 | |
516 | /* | | 516 | /* |
517 | * A free-list of domain numbers for this L1. | | 517 | * A free-list of domain numbers for this L1. |
518 | * We avoid using ffs() and a bitmap to track domains since ffs() | | 518 | * We avoid using ffs() and a bitmap to track domains since ffs() |
519 | * is slow on ARM. | | 519 | * is slow on ARM. |
520 | */ | | 520 | */ |
521 | u_int8_t l1_domain_first; | | 521 | u_int8_t l1_domain_first; |
522 | u_int8_t l1_domain_free[PMAP_DOMAINS]; | | 522 | u_int8_t l1_domain_free[PMAP_DOMAINS]; |
523 | | | 523 | |
524 | /* Physical address of this L1 page table */ | | 524 | /* Physical address of this L1 page table */ |
525 | paddr_t l1_physaddr; | | 525 | paddr_t l1_physaddr; |
526 | | | 526 | |
527 | /* KVA of this L1 page table */ | | 527 | /* KVA of this L1 page table */ |
528 | pd_entry_t *l1_kva; | | 528 | pd_entry_t *l1_kva; |
529 | }; | | 529 | }; |
530 | | | 530 | |
531 | /* | | 531 | /* |
532 | * Convert a virtual address into its L1 table index. That is, the | | 532 | * Convert a virtual address into its L1 table index. That is, the |
533 | * index used to locate the L2 descriptor table pointer in an L1 table. | | 533 | * index used to locate the L2 descriptor table pointer in an L1 table. |
534 | * This is basically used to index l1->l1_kva[]. | | 534 | * This is basically used to index l1->l1_kva[]. |
535 | * | | 535 | * |
536 | * Each L2 descriptor table represents 1MB of VA space. | | 536 | * Each L2 descriptor table represents 1MB of VA space. |
537 | */ | | 537 | */ |
538 | #define L1_IDX(va) (((vaddr_t)(va)) >> L1_S_SHIFT) | | 538 | #define L1_IDX(va) (((vaddr_t)(va)) >> L1_S_SHIFT) |
539 | | | 539 | |
540 | /* | | 540 | /* |
541 | * L1 Page Tables are tracked using a Least Recently Used list. | | 541 | * L1 Page Tables are tracked using a Least Recently Used list. |
542 | * - New L1s are allocated from the HEAD. | | 542 | * - New L1s are allocated from the HEAD. |
543 | * - Freed L1s are added to the TAIl. | | 543 | * - Freed L1s are added to the TAIl. |
544 | * - Recently accessed L1s (where an 'access' is some change to one of | | 544 | * - Recently accessed L1s (where an 'access' is some change to one of |
545 | * the userland pmaps which owns this L1) are moved to the TAIL. | | 545 | * the userland pmaps which owns this L1) are moved to the TAIL. |
546 | */ | | 546 | */ |
547 | static TAILQ_HEAD(, l1_ttable) l1_lru_list; | | 547 | static TAILQ_HEAD(, l1_ttable) l1_lru_list; |
548 | static struct simplelock l1_lru_lock; | | 548 | static struct simplelock l1_lru_lock; |
549 | | | 549 | |
550 | /* | | 550 | /* |
551 | * A list of all L1 tables | | 551 | * A list of all L1 tables |
552 | */ | | 552 | */ |
553 | static SLIST_HEAD(, l1_ttable) l1_list; | | 553 | static SLIST_HEAD(, l1_ttable) l1_list; |
554 | | | 554 | |
555 | /* | | 555 | /* |
556 | * The l2_dtable tracks L2_BUCKET_SIZE worth of L1 slots. | | 556 | * The l2_dtable tracks L2_BUCKET_SIZE worth of L1 slots. |
557 | * | | 557 | * |
558 | * This is normally 16MB worth L2 page descriptors for any given pmap. | | 558 | * This is normally 16MB worth L2 page descriptors for any given pmap. |
559 | * Reference counts are maintained for L2 descriptors so they can be | | 559 | * Reference counts are maintained for L2 descriptors so they can be |
560 | * freed when empty. | | 560 | * freed when empty. |
561 | */ | | 561 | */ |
562 | struct l2_dtable { | | 562 | struct l2_dtable { |
563 | /* The number of L2 page descriptors allocated to this l2_dtable */ | | 563 | /* The number of L2 page descriptors allocated to this l2_dtable */ |
564 | u_int l2_occupancy; | | 564 | u_int l2_occupancy; |
565 | | | 565 | |
566 | /* List of L2 page descriptors */ | | 566 | /* List of L2 page descriptors */ |
567 | struct l2_bucket { | | 567 | struct l2_bucket { |
568 | pt_entry_t *l2b_kva; /* KVA of L2 Descriptor Table */ | | 568 | pt_entry_t *l2b_kva; /* KVA of L2 Descriptor Table */ |
569 | paddr_t l2b_phys; /* Physical address of same */ | | 569 | paddr_t l2b_phys; /* Physical address of same */ |
570 | u_short l2b_l1idx; /* This L2 table's L1 index */ | | 570 | u_short l2b_l1idx; /* This L2 table's L1 index */ |
571 | u_short l2b_occupancy; /* How many active descriptors */ | | 571 | u_short l2b_occupancy; /* How many active descriptors */ |
572 | } l2_bucket[L2_BUCKET_SIZE]; | | 572 | } l2_bucket[L2_BUCKET_SIZE]; |
573 | }; | | 573 | }; |
574 | | | 574 | |
575 | /* | | 575 | /* |
576 | * Given an L1 table index, calculate the corresponding l2_dtable index | | 576 | * Given an L1 table index, calculate the corresponding l2_dtable index |
577 | * and bucket index within the l2_dtable. | | 577 | * and bucket index within the l2_dtable. |
578 | */ | | 578 | */ |
579 | #define L2_IDX(l1idx) (((l1idx) >> L2_BUCKET_LOG2) & \ | | 579 | #define L2_IDX(l1idx) (((l1idx) >> L2_BUCKET_LOG2) & \ |
580 | (L2_SIZE - 1)) | | 580 | (L2_SIZE - 1)) |
581 | #define L2_BUCKET(l1idx) ((l1idx) & (L2_BUCKET_SIZE - 1)) | | 581 | #define L2_BUCKET(l1idx) ((l1idx) & (L2_BUCKET_SIZE - 1)) |
582 | | | 582 | |
583 | /* | | 583 | /* |
584 | * Given a virtual address, this macro returns the | | 584 | * Given a virtual address, this macro returns the |
585 | * virtual address required to drop into the next L2 bucket. | | 585 | * virtual address required to drop into the next L2 bucket. |
586 | */ | | 586 | */ |
587 | #define L2_NEXT_BUCKET(va) (((va) & L1_S_FRAME) + L1_S_SIZE) | | 587 | #define L2_NEXT_BUCKET(va) (((va) & L1_S_FRAME) + L1_S_SIZE) |
588 | | | 588 | |
589 | /* | | 589 | /* |
590 | * L2 allocation. | | 590 | * L2 allocation. |
591 | */ | | 591 | */ |
592 | #define pmap_alloc_l2_dtable() \ | | 592 | #define pmap_alloc_l2_dtable() \ |
593 | pool_cache_get(&pmap_l2dtable_cache, PR_NOWAIT) | | 593 | pool_cache_get(&pmap_l2dtable_cache, PR_NOWAIT) |
594 | #define pmap_free_l2_dtable(l2) \ | | 594 | #define pmap_free_l2_dtable(l2) \ |
595 | pool_cache_put(&pmap_l2dtable_cache, (l2)) | | 595 | pool_cache_put(&pmap_l2dtable_cache, (l2)) |
596 | #define pmap_alloc_l2_ptp(pap) \ | | 596 | #define pmap_alloc_l2_ptp(pap) \ |
597 | ((pt_entry_t *)pool_cache_get_paddr(&pmap_l2ptp_cache,\ | | 597 | ((pt_entry_t *)pool_cache_get_paddr(&pmap_l2ptp_cache,\ |
598 | PR_NOWAIT, (pap))) | | 598 | PR_NOWAIT, (pap))) |
599 | | | 599 | |
600 | /* | | 600 | /* |
601 | * We try to map the page tables write-through, if possible. However, not | | 601 | * We try to map the page tables write-through, if possible. However, not |
602 | * all CPUs have a write-through cache mode, so on those we have to sync | | 602 | * all CPUs have a write-through cache mode, so on those we have to sync |
603 | * the cache when we frob page tables. | | 603 | * the cache when we frob page tables. |
604 | * | | 604 | * |
605 | * We try to evaluate this at compile time, if possible. However, it's | | 605 | * We try to evaluate this at compile time, if possible. However, it's |
606 | * not always possible to do that, hence this run-time var. | | 606 | * not always possible to do that, hence this run-time var. |
607 | */ | | 607 | */ |
608 | int pmap_needs_pte_sync; | | 608 | int pmap_needs_pte_sync; |
609 | | | 609 | |
610 | /* | | 610 | /* |
611 | * Real definition of pv_entry. | | 611 | * Real definition of pv_entry. |
612 | */ | | 612 | */ |
613 | struct pv_entry { | | 613 | struct pv_entry { |
614 | SLIST_ENTRY(pv_entry) pv_link; /* next pv_entry */ | | 614 | SLIST_ENTRY(pv_entry) pv_link; /* next pv_entry */ |
615 | pmap_t pv_pmap; /* pmap where mapping lies */ | | 615 | pmap_t pv_pmap; /* pmap where mapping lies */ |
616 | vaddr_t pv_va; /* virtual address for mapping */ | | 616 | vaddr_t pv_va; /* virtual address for mapping */ |
617 | u_int pv_flags; /* flags */ | | 617 | u_int pv_flags; /* flags */ |
618 | }; | | 618 | }; |
619 | | | 619 | |
620 | /* | | 620 | /* |
621 | * Macro to determine if a mapping might be resident in the | | 621 | * Macro to determine if a mapping might be resident in the |
622 | * instruction cache and/or TLB | | 622 | * instruction cache and/or TLB |
623 | */ | | 623 | */ |
624 | #define PV_BEEN_EXECD(f) (((f) & (PVF_REF | PVF_EXEC)) == (PVF_REF | PVF_EXEC)) | | 624 | #define PV_BEEN_EXECD(f) (((f) & (PVF_REF | PVF_EXEC)) == (PVF_REF | PVF_EXEC)) |
625 | #define PV_IS_EXEC_P(f) (((f) & PVF_EXEC) != 0) | | 625 | #define PV_IS_EXEC_P(f) (((f) & PVF_EXEC) != 0) |
626 | | | 626 | |
627 | /* | | 627 | /* |
628 | * Macro to determine if a mapping might be resident in the | | 628 | * Macro to determine if a mapping might be resident in the |
629 | * data cache and/or TLB | | 629 | * data cache and/or TLB |
630 | */ | | 630 | */ |
631 | #define PV_BEEN_REFD(f) (((f) & PVF_REF) != 0) | | 631 | #define PV_BEEN_REFD(f) (((f) & PVF_REF) != 0) |
632 | | | 632 | |
633 | /* | | 633 | /* |
634 | * Local prototypes | | 634 | * Local prototypes |
635 | */ | | 635 | */ |
636 | static int pmap_set_pt_cache_mode(pd_entry_t *, vaddr_t); | | 636 | static int pmap_set_pt_cache_mode(pd_entry_t *, vaddr_t); |
637 | static void pmap_alloc_specials(vaddr_t *, int, vaddr_t *, | | 637 | static void pmap_alloc_specials(vaddr_t *, int, vaddr_t *, |
638 | pt_entry_t **); | | 638 | pt_entry_t **); |
639 | static bool pmap_is_current(pmap_t); | | 639 | static bool pmap_is_current(pmap_t); |
640 | static bool pmap_is_cached(pmap_t); | | 640 | static bool pmap_is_cached(pmap_t); |
641 | static void pmap_enter_pv(struct vm_page_md *, paddr_t, struct pv_entry *, | | 641 | static void pmap_enter_pv(struct vm_page_md *, paddr_t, struct pv_entry *, |
642 | pmap_t, vaddr_t, u_int); | | 642 | pmap_t, vaddr_t, u_int); |
643 | static struct pv_entry *pmap_find_pv(struct vm_page_md *, pmap_t, vaddr_t); | | 643 | static struct pv_entry *pmap_find_pv(struct vm_page_md *, pmap_t, vaddr_t); |
644 | static struct pv_entry *pmap_remove_pv(struct vm_page_md *, paddr_t, pmap_t, vaddr_t); | | 644 | static struct pv_entry *pmap_remove_pv(struct vm_page_md *, paddr_t, pmap_t, vaddr_t); |
645 | static u_int pmap_modify_pv(struct vm_page_md *, paddr_t, pmap_t, vaddr_t, | | 645 | static u_int pmap_modify_pv(struct vm_page_md *, paddr_t, pmap_t, vaddr_t, |
646 | u_int, u_int); | | 646 | u_int, u_int); |
647 | | | 647 | |
648 | static void pmap_pinit(pmap_t); | | 648 | static void pmap_pinit(pmap_t); |
649 | static int pmap_pmap_ctor(void *, void *, int); | | 649 | static int pmap_pmap_ctor(void *, void *, int); |
650 | | | 650 | |
651 | static void pmap_alloc_l1(pmap_t); | | 651 | static void pmap_alloc_l1(pmap_t); |
652 | static void pmap_free_l1(pmap_t); | | 652 | static void pmap_free_l1(pmap_t); |
653 | static void pmap_use_l1(pmap_t); | | 653 | static void pmap_use_l1(pmap_t); |
654 | | | 654 | |
655 | static struct l2_bucket *pmap_get_l2_bucket(pmap_t, vaddr_t); | | 655 | static struct l2_bucket *pmap_get_l2_bucket(pmap_t, vaddr_t); |
656 | static struct l2_bucket *pmap_alloc_l2_bucket(pmap_t, vaddr_t); | | 656 | static struct l2_bucket *pmap_alloc_l2_bucket(pmap_t, vaddr_t); |
657 | static void pmap_free_l2_bucket(pmap_t, struct l2_bucket *, u_int); | | 657 | static void pmap_free_l2_bucket(pmap_t, struct l2_bucket *, u_int); |
658 | static int pmap_l2ptp_ctor(void *, void *, int); | | 658 | static int pmap_l2ptp_ctor(void *, void *, int); |
659 | static int pmap_l2dtable_ctor(void *, void *, int); | | 659 | static int pmap_l2dtable_ctor(void *, void *, int); |
660 | | | 660 | |
661 | static void pmap_vac_me_harder(struct vm_page_md *, paddr_t, pmap_t, vaddr_t); | | 661 | static void pmap_vac_me_harder(struct vm_page_md *, paddr_t, pmap_t, vaddr_t); |
662 | #ifdef PMAP_CACHE_VIVT | | 662 | #ifdef PMAP_CACHE_VIVT |
663 | static void pmap_vac_me_kpmap(struct vm_page_md *, paddr_t, pmap_t, vaddr_t); | | 663 | static void pmap_vac_me_kpmap(struct vm_page_md *, paddr_t, pmap_t, vaddr_t); |
664 | static void pmap_vac_me_user(struct vm_page_md *, paddr_t, pmap_t, vaddr_t); | | 664 | static void pmap_vac_me_user(struct vm_page_md *, paddr_t, pmap_t, vaddr_t); |
665 | #endif | | 665 | #endif |
666 | | | 666 | |
667 | static void pmap_clearbit(struct vm_page_md *, paddr_t, u_int); | | 667 | static void pmap_clearbit(struct vm_page_md *, paddr_t, u_int); |
668 | #ifdef PMAP_CACHE_VIVT | | 668 | #ifdef PMAP_CACHE_VIVT |
669 | static int pmap_clean_page(struct pv_entry *, bool); | | 669 | static int pmap_clean_page(struct pv_entry *, bool); |
670 | #endif | | 670 | #endif |
671 | #ifdef PMAP_CACHE_VIPT | | 671 | #ifdef PMAP_CACHE_VIPT |
672 | static void pmap_syncicache_page(struct vm_page_md *, paddr_t); | | 672 | static void pmap_syncicache_page(struct vm_page_md *, paddr_t); |
673 | enum pmap_flush_op { | | 673 | enum pmap_flush_op { |
674 | PMAP_FLUSH_PRIMARY, | | 674 | PMAP_FLUSH_PRIMARY, |
675 | PMAP_FLUSH_SECONDARY, | | 675 | PMAP_FLUSH_SECONDARY, |
676 | PMAP_CLEAN_PRIMARY | | 676 | PMAP_CLEAN_PRIMARY |
677 | }; | | 677 | }; |
678 | static void pmap_flush_page(struct vm_page_md *, paddr_t, enum pmap_flush_op); | | 678 | static void pmap_flush_page(struct vm_page_md *, paddr_t, enum pmap_flush_op); |
679 | #endif | | 679 | #endif |
680 | static void pmap_page_remove(struct vm_page_md *, paddr_t); | | 680 | static void pmap_page_remove(struct vm_page_md *, paddr_t); |
681 | | | 681 | |
682 | static void pmap_init_l1(struct l1_ttable *, pd_entry_t *); | | 682 | static void pmap_init_l1(struct l1_ttable *, pd_entry_t *); |
683 | static vaddr_t kernel_pt_lookup(paddr_t); | | 683 | static vaddr_t kernel_pt_lookup(paddr_t); |
684 | | | 684 | |
685 | | | 685 | |
686 | /* | | 686 | /* |
687 | * External function prototypes | | 687 | * External function prototypes |
688 | */ | | 688 | */ |
689 | extern void bzero_page(vaddr_t); | | 689 | extern void bzero_page(vaddr_t); |
690 | extern void bcopy_page(vaddr_t, vaddr_t); | | 690 | extern void bcopy_page(vaddr_t, vaddr_t); |
691 | | | 691 | |
692 | /* | | 692 | /* |
693 | * Misc variables | | 693 | * Misc variables |
694 | */ | | 694 | */ |
695 | vaddr_t virtual_avail; | | 695 | vaddr_t virtual_avail; |
696 | vaddr_t virtual_end; | | 696 | vaddr_t virtual_end; |
697 | vaddr_t pmap_curmaxkvaddr; | | 697 | vaddr_t pmap_curmaxkvaddr; |
698 | | | 698 | |
699 | paddr_t avail_start; | | 699 | paddr_t avail_start; |
700 | paddr_t avail_end; | | 700 | paddr_t avail_end; |
701 | | | 701 | |
702 | pv_addrqh_t pmap_boot_freeq = SLIST_HEAD_INITIALIZER(&pmap_boot_freeq); | | 702 | pv_addrqh_t pmap_boot_freeq = SLIST_HEAD_INITIALIZER(&pmap_boot_freeq); |
703 | pv_addr_t kernelpages; | | 703 | pv_addr_t kernelpages; |
704 | pv_addr_t kernel_l1pt; | | 704 | pv_addr_t kernel_l1pt; |
705 | pv_addr_t systempage; | | 705 | pv_addr_t systempage; |
706 | | | 706 | |
707 | /* Function to set the debug level of the pmap code */ | | 707 | /* Function to set the debug level of the pmap code */ |
708 | | | 708 | |
709 | #ifdef PMAP_DEBUG | | 709 | #ifdef PMAP_DEBUG |
710 | void | | 710 | void |
711 | pmap_debug(int level) | | 711 | pmap_debug(int level) |
712 | { | | 712 | { |
713 | pmap_debug_level = level; | | 713 | pmap_debug_level = level; |
714 | printf("pmap_debug: level=%d\n", pmap_debug_level); | | 714 | printf("pmap_debug: level=%d\n", pmap_debug_level); |
715 | } | | 715 | } |
716 | #endif /* PMAP_DEBUG */ | | 716 | #endif /* PMAP_DEBUG */ |
717 | | | 717 | |
718 | /* | | 718 | /* |
719 | * A bunch of routines to conditionally flush the caches/TLB depending | | 719 | * A bunch of routines to conditionally flush the caches/TLB depending |
720 | * on whether the specified pmap actually needs to be flushed at any | | 720 | * on whether the specified pmap actually needs to be flushed at any |
721 | * given time. | | 721 | * given time. |
722 | */ | | 722 | */ |
723 | static inline void | | 723 | static inline void |
724 | pmap_tlb_flushID_SE(pmap_t pm, vaddr_t va) | | 724 | pmap_tlb_flushID_SE(pmap_t pm, vaddr_t va) |
725 | { | | 725 | { |
726 | | | 726 | |
727 | if (pm->pm_cstate.cs_tlb_id) | | 727 | if (pm->pm_cstate.cs_tlb_id) |
728 | cpu_tlb_flushID_SE(va); | | 728 | cpu_tlb_flushID_SE(va); |
729 | } | | 729 | } |
730 | | | 730 | |
731 | static inline void | | 731 | static inline void |
732 | pmap_tlb_flushD_SE(pmap_t pm, vaddr_t va) | | 732 | pmap_tlb_flushD_SE(pmap_t pm, vaddr_t va) |
733 | { | | 733 | { |
734 | | | 734 | |
735 | if (pm->pm_cstate.cs_tlb_d) | | 735 | if (pm->pm_cstate.cs_tlb_d) |
736 | cpu_tlb_flushD_SE(va); | | 736 | cpu_tlb_flushD_SE(va); |
737 | } | | 737 | } |
738 | | | 738 | |
739 | static inline void | | 739 | static inline void |
740 | pmap_tlb_flushID(pmap_t pm) | | 740 | pmap_tlb_flushID(pmap_t pm) |
741 | { | | 741 | { |
742 | | | 742 | |
743 | if (pm->pm_cstate.cs_tlb_id) { | | 743 | if (pm->pm_cstate.cs_tlb_id) { |
744 | cpu_tlb_flushID(); | | 744 | cpu_tlb_flushID(); |
745 | pm->pm_cstate.cs_tlb = 0; | | 745 | pm->pm_cstate.cs_tlb = 0; |
746 | } | | 746 | } |
747 | } | | 747 | } |
748 | | | 748 | |
749 | static inline void | | 749 | static inline void |
750 | pmap_tlb_flushD(pmap_t pm) | | 750 | pmap_tlb_flushD(pmap_t pm) |
751 | { | | 751 | { |
752 | | | 752 | |
753 | if (pm->pm_cstate.cs_tlb_d) { | | 753 | if (pm->pm_cstate.cs_tlb_d) { |
754 | cpu_tlb_flushD(); | | 754 | cpu_tlb_flushD(); |
755 | pm->pm_cstate.cs_tlb_d = 0; | | 755 | pm->pm_cstate.cs_tlb_d = 0; |
756 | } | | 756 | } |
757 | } | | 757 | } |
758 | | | 758 | |
759 | #ifdef PMAP_CACHE_VIVT | | 759 | #ifdef PMAP_CACHE_VIVT |
760 | static inline void | | 760 | static inline void |
761 | pmap_idcache_wbinv_range(pmap_t pm, vaddr_t va, vsize_t len) | | 761 | pmap_idcache_wbinv_range(pmap_t pm, vaddr_t va, vsize_t len) |
762 | { | | 762 | { |
763 | if (pm->pm_cstate.cs_cache_id) { | | 763 | if (pm->pm_cstate.cs_cache_id) { |
764 | cpu_idcache_wbinv_range(va, len); | | 764 | cpu_idcache_wbinv_range(va, len); |
765 | } | | 765 | } |
766 | } | | 766 | } |
767 | | | 767 | |
768 | static inline void | | 768 | static inline void |
769 | pmap_dcache_wb_range(pmap_t pm, vaddr_t va, vsize_t len, | | 769 | pmap_dcache_wb_range(pmap_t pm, vaddr_t va, vsize_t len, |
770 | bool do_inv, bool rd_only) | | 770 | bool do_inv, bool rd_only) |
771 | { | | 771 | { |
772 | | | 772 | |
773 | if (pm->pm_cstate.cs_cache_d) { | | 773 | if (pm->pm_cstate.cs_cache_d) { |
774 | if (do_inv) { | | 774 | if (do_inv) { |
775 | if (rd_only) | | 775 | if (rd_only) |
776 | cpu_dcache_inv_range(va, len); | | 776 | cpu_dcache_inv_range(va, len); |
777 | else | | 777 | else |
778 | cpu_dcache_wbinv_range(va, len); | | 778 | cpu_dcache_wbinv_range(va, len); |
779 | } else | | 779 | } else |
780 | if (!rd_only) | | 780 | if (!rd_only) |
781 | cpu_dcache_wb_range(va, len); | | 781 | cpu_dcache_wb_range(va, len); |
782 | } | | 782 | } |
783 | } | | 783 | } |
784 | | | 784 | |
785 | static inline void | | 785 | static inline void |
786 | pmap_idcache_wbinv_all(pmap_t pm) | | 786 | pmap_idcache_wbinv_all(pmap_t pm) |
787 | { | | 787 | { |
788 | if (pm->pm_cstate.cs_cache_id) { | | 788 | if (pm->pm_cstate.cs_cache_id) { |
789 | cpu_idcache_wbinv_all(); | | 789 | cpu_idcache_wbinv_all(); |
790 | pm->pm_cstate.cs_cache = 0; | | 790 | pm->pm_cstate.cs_cache = 0; |
791 | } | | 791 | } |
792 | } | | 792 | } |
793 | | | 793 | |
794 | static inline void | | 794 | static inline void |
795 | pmap_dcache_wbinv_all(pmap_t pm) | | 795 | pmap_dcache_wbinv_all(pmap_t pm) |
796 | { | | 796 | { |
797 | if (pm->pm_cstate.cs_cache_d) { | | 797 | if (pm->pm_cstate.cs_cache_d) { |
798 | cpu_dcache_wbinv_all(); | | 798 | cpu_dcache_wbinv_all(); |
799 | pm->pm_cstate.cs_cache_d = 0; | | 799 | pm->pm_cstate.cs_cache_d = 0; |
800 | } | | 800 | } |
801 | } | | 801 | } |
802 | #endif /* PMAP_CACHE_VIVT */ | | 802 | #endif /* PMAP_CACHE_VIVT */ |
803 | | | 803 | |
804 | static inline bool | | 804 | static inline bool |
805 | pmap_is_current(pmap_t pm) | | 805 | pmap_is_current(pmap_t pm) |
806 | { | | 806 | { |
807 | | | 807 | |
808 | if (pm == pmap_kernel() || curproc->p_vmspace->vm_map.pmap == pm) | | 808 | if (pm == pmap_kernel() || curproc->p_vmspace->vm_map.pmap == pm) |
809 | return true; | | 809 | return true; |
810 | | | 810 | |
811 | return false; | | 811 | return false; |
812 | } | | 812 | } |
813 | | | 813 | |
814 | static inline bool | | 814 | static inline bool |
815 | pmap_is_cached(pmap_t pm) | | 815 | pmap_is_cached(pmap_t pm) |
816 | { | | 816 | { |
817 | | | 817 | |
818 | if (pm == pmap_kernel() || pmap_recent_user == NULL || | | 818 | if (pm == pmap_kernel() || pmap_recent_user == NULL || |
819 | pmap_recent_user == pm) | | 819 | pmap_recent_user == pm) |
820 | return (true); | | 820 | return (true); |
821 | | | 821 | |
822 | return false; | | 822 | return false; |
823 | } | | 823 | } |
824 | | | 824 | |
825 | /* | | 825 | /* |
826 | * PTE_SYNC_CURRENT: | | 826 | * PTE_SYNC_CURRENT: |
827 | * | | 827 | * |
828 | * Make sure the pte is written out to RAM. | | 828 | * Make sure the pte is written out to RAM. |
829 | * We need to do this for one of two cases: | | 829 | * We need to do this for one of two cases: |
830 | * - We're dealing with the kernel pmap | | 830 | * - We're dealing with the kernel pmap |
831 | * - There is no pmap active in the cache/tlb. | | 831 | * - There is no pmap active in the cache/tlb. |
832 | * - The specified pmap is 'active' in the cache/tlb. | | 832 | * - The specified pmap is 'active' in the cache/tlb. |
833 | */ | | 833 | */ |
834 | #ifdef PMAP_INCLUDE_PTE_SYNC | | 834 | #ifdef PMAP_INCLUDE_PTE_SYNC |
835 | #define PTE_SYNC_CURRENT(pm, ptep) \ | | 835 | #define PTE_SYNC_CURRENT(pm, ptep) \ |
836 | do { \ | | 836 | do { \ |
837 | if (PMAP_NEEDS_PTE_SYNC && \ | | 837 | if (PMAP_NEEDS_PTE_SYNC && \ |
838 | pmap_is_cached(pm)) \ | | 838 | pmap_is_cached(pm)) \ |
839 | PTE_SYNC(ptep); \ | | 839 | PTE_SYNC(ptep); \ |
840 | } while (/*CONSTCOND*/0) | | 840 | } while (/*CONSTCOND*/0) |
841 | #else | | 841 | #else |
842 | #define PTE_SYNC_CURRENT(pm, ptep) /* nothing */ | | 842 | #define PTE_SYNC_CURRENT(pm, ptep) /* nothing */ |
843 | #endif | | 843 | #endif |
844 | | | 844 | |
845 | /* | | 845 | /* |
846 | * main pv_entry manipulation functions: | | 846 | * main pv_entry manipulation functions: |
847 | * pmap_enter_pv: enter a mapping onto a vm_page list | | 847 | * pmap_enter_pv: enter a mapping onto a vm_page list |
848 | * pmap_remove_pv: remove a mappiing from a vm_page list | | 848 | * pmap_remove_pv: remove a mappiing from a vm_page list |
849 | * | | 849 | * |
850 | * NOTE: pmap_enter_pv expects to lock the pvh itself | | 850 | * NOTE: pmap_enter_pv expects to lock the pvh itself |
851 | * pmap_remove_pv expects te caller to lock the pvh before calling | | 851 | * pmap_remove_pv expects te caller to lock the pvh before calling |
852 | */ | | 852 | */ |
853 | | | 853 | |
854 | /* | | 854 | /* |
855 | * pmap_enter_pv: enter a mapping onto a vm_page lst | | 855 | * pmap_enter_pv: enter a mapping onto a vm_page lst |
856 | * | | 856 | * |
857 | * => caller should hold the proper lock on pmap_main_lock | | 857 | * => caller should hold the proper lock on pmap_main_lock |
858 | * => caller should have pmap locked | | 858 | * => caller should have pmap locked |
859 | * => we will gain the lock on the vm_page and allocate the new pv_entry | | 859 | * => we will gain the lock on the vm_page and allocate the new pv_entry |
860 | * => caller should adjust ptp's wire_count before calling | | 860 | * => caller should adjust ptp's wire_count before calling |
861 | * => caller should not adjust pmap's wire_count | | 861 | * => caller should not adjust pmap's wire_count |
862 | */ | | 862 | */ |
863 | static void | | 863 | static void |
864 | pmap_enter_pv(struct vm_page_md *md, paddr_t pa, struct pv_entry *pv, pmap_t pm, | | 864 | pmap_enter_pv(struct vm_page_md *md, paddr_t pa, struct pv_entry *pv, pmap_t pm, |
865 | vaddr_t va, u_int flags) | | 865 | vaddr_t va, u_int flags) |
866 | { | | 866 | { |
867 | struct pv_entry **pvp; | | 867 | struct pv_entry **pvp; |
868 | | | 868 | |
869 | NPDEBUG(PDB_PVDUMP, | | 869 | NPDEBUG(PDB_PVDUMP, |
870 | printf("pmap_enter_pv: pm %p, md %p, flags 0x%x\n", pm, md, flags)); | | 870 | printf("pmap_enter_pv: pm %p, md %p, flags 0x%x\n", pm, md, flags)); |
871 | | | 871 | |
872 | pv->pv_pmap = pm; | | 872 | pv->pv_pmap = pm; |
873 | pv->pv_va = va; | | 873 | pv->pv_va = va; |
874 | pv->pv_flags = flags; | | 874 | pv->pv_flags = flags; |
875 | | | 875 | |
876 | simple_lock(&md->pvh_slock); /* lock vm_page */ | | 876 | simple_lock(&md->pvh_slock); /* lock vm_page */ |
877 | pvp = &SLIST_FIRST(&md->pvh_list); | | 877 | pvp = &SLIST_FIRST(&md->pvh_list); |
878 | #ifdef PMAP_CACHE_VIPT | | 878 | #ifdef PMAP_CACHE_VIPT |
879 | /* | | 879 | /* |
880 | * Insert unmanaged entries, writeable first, at the head of | | 880 | * Insert unmanaged entries, writeable first, at the head of |
881 | * the pv list. | | 881 | * the pv list. |
882 | */ | | 882 | */ |
883 | if (__predict_true((flags & PVF_KENTRY) == 0)) { | | 883 | if (__predict_true((flags & PVF_KENTRY) == 0)) { |
884 | while (*pvp != NULL && (*pvp)->pv_flags & PVF_KENTRY) | | 884 | while (*pvp != NULL && (*pvp)->pv_flags & PVF_KENTRY) |
885 | pvp = &SLIST_NEXT(*pvp, pv_link); | | 885 | pvp = &SLIST_NEXT(*pvp, pv_link); |
886 | } else if ((flags & PVF_WRITE) == 0) { | | 886 | } else if ((flags & PVF_WRITE) == 0) { |
887 | while (*pvp != NULL && (*pvp)->pv_flags & PVF_WRITE) | | 887 | while (*pvp != NULL && (*pvp)->pv_flags & PVF_WRITE) |
888 | pvp = &SLIST_NEXT(*pvp, pv_link); | | 888 | pvp = &SLIST_NEXT(*pvp, pv_link); |
889 | } | | 889 | } |
890 | #endif | | 890 | #endif |
891 | SLIST_NEXT(pv, pv_link) = *pvp; /* add to ... */ | | 891 | SLIST_NEXT(pv, pv_link) = *pvp; /* add to ... */ |
892 | *pvp = pv; /* ... locked list */ | | 892 | *pvp = pv; /* ... locked list */ |
893 | md->pvh_attrs |= flags & (PVF_REF | PVF_MOD); | | 893 | md->pvh_attrs |= flags & (PVF_REF | PVF_MOD); |
894 | #ifdef PMAP_CACHE_VIPT | | 894 | #ifdef PMAP_CACHE_VIPT |
895 | if ((pv->pv_flags & PVF_KWRITE) == PVF_KWRITE) | | 895 | if ((pv->pv_flags & PVF_KWRITE) == PVF_KWRITE) |
896 | md->pvh_attrs |= PVF_KMOD; | | 896 | md->pvh_attrs |= PVF_KMOD; |
897 | if ((md->pvh_attrs & (PVF_DMOD|PVF_NC)) != PVF_NC) | | 897 | if ((md->pvh_attrs & (PVF_DMOD|PVF_NC)) != PVF_NC) |
898 | md->pvh_attrs |= PVF_DIRTY; | | 898 | md->pvh_attrs |= PVF_DIRTY; |
899 | KASSERT((md->pvh_attrs & PVF_DMOD) == 0 || (md->pvh_attrs & (PVF_DIRTY|PVF_NC))); | | 899 | KASSERT((md->pvh_attrs & PVF_DMOD) == 0 || (md->pvh_attrs & (PVF_DIRTY|PVF_NC))); |
900 | #endif | | 900 | #endif |
901 | if (pm == pmap_kernel()) { | | 901 | if (pm == pmap_kernel()) { |
902 | PMAPCOUNT(kernel_mappings); | | 902 | PMAPCOUNT(kernel_mappings); |
903 | if (flags & PVF_WRITE) | | 903 | if (flags & PVF_WRITE) |
904 | md->krw_mappings++; | | 904 | md->krw_mappings++; |
905 | else | | 905 | else |
906 | md->kro_mappings++; | | 906 | md->kro_mappings++; |
907 | } else { | | 907 | } else { |
908 | if (flags & PVF_WRITE) | | 908 | if (flags & PVF_WRITE) |
909 | md->urw_mappings++; | | 909 | md->urw_mappings++; |
910 | else | | 910 | else |
911 | md->uro_mappings++; | | 911 | md->uro_mappings++; |
912 | } | | 912 | } |
913 | | | 913 | |
914 | #ifdef PMAP_CACHE_VIPT | | 914 | #ifdef PMAP_CACHE_VIPT |
915 | /* | | 915 | /* |
916 | * If this is an exec mapping and its the first exec mapping | | 916 | * If this is an exec mapping and its the first exec mapping |
917 | * for this page, make sure to sync the I-cache. | | 917 | * for this page, make sure to sync the I-cache. |
918 | */ | | 918 | */ |
919 | if (PV_IS_EXEC_P(flags)) { | | 919 | if (PV_IS_EXEC_P(flags)) { |
920 | if (!PV_IS_EXEC_P(md->pvh_attrs)) { | | 920 | if (!PV_IS_EXEC_P(md->pvh_attrs)) { |
921 | pmap_syncicache_page(md, pa); | | 921 | pmap_syncicache_page(md, pa); |
922 | PMAPCOUNT(exec_synced_map); | | 922 | PMAPCOUNT(exec_synced_map); |
923 | } | | 923 | } |
924 | PMAPCOUNT(exec_mappings); | | 924 | PMAPCOUNT(exec_mappings); |
925 | } | | 925 | } |
926 | #endif | | 926 | #endif |
927 | | | 927 | |
928 | PMAPCOUNT(mappings); | | 928 | PMAPCOUNT(mappings); |
929 | simple_unlock(&md->pvh_slock); /* unlock, done! */ | | 929 | simple_unlock(&md->pvh_slock); /* unlock, done! */ |
930 | | | 930 | |
931 | if (pv->pv_flags & PVF_WIRED) | | 931 | if (pv->pv_flags & PVF_WIRED) |
932 | ++pm->pm_stats.wired_count; | | 932 | ++pm->pm_stats.wired_count; |
933 | } | | 933 | } |
934 | | | 934 | |
935 | /* | | 935 | /* |
936 | * | | 936 | * |
937 | * pmap_find_pv: Find a pv entry | | 937 | * pmap_find_pv: Find a pv entry |
938 | * | | 938 | * |
939 | * => caller should hold lock on vm_page | | 939 | * => caller should hold lock on vm_page |
940 | */ | | 940 | */ |
941 | static inline struct pv_entry * | | 941 | static inline struct pv_entry * |
942 | pmap_find_pv(struct vm_page_md *md, pmap_t pm, vaddr_t va) | | 942 | pmap_find_pv(struct vm_page_md *md, pmap_t pm, vaddr_t va) |
943 | { | | 943 | { |
944 | struct pv_entry *pv; | | 944 | struct pv_entry *pv; |
945 | | | 945 | |
946 | SLIST_FOREACH(pv, &md->pvh_list, pv_link) { | | 946 | SLIST_FOREACH(pv, &md->pvh_list, pv_link) { |
947 | if (pm == pv->pv_pmap && va == pv->pv_va) | | 947 | if (pm == pv->pv_pmap && va == pv->pv_va) |
948 | break; | | 948 | break; |
949 | } | | 949 | } |
950 | | | 950 | |
951 | return (pv); | | 951 | return (pv); |
952 | } | | 952 | } |
953 | | | 953 | |
954 | /* | | 954 | /* |
955 | * pmap_remove_pv: try to remove a mapping from a pv_list | | 955 | * pmap_remove_pv: try to remove a mapping from a pv_list |
956 | * | | 956 | * |
957 | * => caller should hold proper lock on pmap_main_lock | | 957 | * => caller should hold proper lock on pmap_main_lock |
958 | * => pmap should be locked | | 958 | * => pmap should be locked |
959 | * => caller should hold lock on vm_page [so that attrs can be adjusted] | | 959 | * => caller should hold lock on vm_page [so that attrs can be adjusted] |
960 | * => caller should adjust ptp's wire_count and free PTP if needed | | 960 | * => caller should adjust ptp's wire_count and free PTP if needed |
961 | * => caller should NOT adjust pmap's wire_count | | 961 | * => caller should NOT adjust pmap's wire_count |
962 | * => we return the removed pv | | 962 | * => we return the removed pv |
963 | */ | | 963 | */ |
964 | static struct pv_entry * | | 964 | static struct pv_entry * |
965 | pmap_remove_pv(struct vm_page_md *md, paddr_t pa, pmap_t pm, vaddr_t va) | | 965 | pmap_remove_pv(struct vm_page_md *md, paddr_t pa, pmap_t pm, vaddr_t va) |
966 | { | | 966 | { |
967 | struct pv_entry *pv, **prevptr; | | 967 | struct pv_entry *pv, **prevptr; |
968 | | | 968 | |
969 | NPDEBUG(PDB_PVDUMP, | | 969 | NPDEBUG(PDB_PVDUMP, |
970 | printf("pmap_remove_pv: pm %p, md %p, va 0x%08lx\n", pm, md, va)); | | 970 | printf("pmap_remove_pv: pm %p, md %p, va 0x%08lx\n", pm, md, va)); |
971 | | | 971 | |
972 | prevptr = &SLIST_FIRST(&md->pvh_list); /* prev pv_entry ptr */ | | 972 | prevptr = &SLIST_FIRST(&md->pvh_list); /* prev pv_entry ptr */ |
973 | pv = *prevptr; | | 973 | pv = *prevptr; |
974 | | | 974 | |
975 | while (pv) { | | 975 | while (pv) { |
976 | if (pv->pv_pmap == pm && pv->pv_va == va) { /* match? */ | | 976 | if (pv->pv_pmap == pm && pv->pv_va == va) { /* match? */ |
977 | NPDEBUG(PDB_PVDUMP, printf("pmap_remove_pv: pm %p, md " | | 977 | NPDEBUG(PDB_PVDUMP, printf("pmap_remove_pv: pm %p, md " |
978 | "%p, flags 0x%x\n", pm, md, pv->pv_flags)); | | 978 | "%p, flags 0x%x\n", pm, md, pv->pv_flags)); |
979 | if (pv->pv_flags & PVF_WIRED) { | | 979 | if (pv->pv_flags & PVF_WIRED) { |
980 | --pm->pm_stats.wired_count; | | 980 | --pm->pm_stats.wired_count; |
981 | } | | 981 | } |
982 | *prevptr = SLIST_NEXT(pv, pv_link); /* remove it! */ | | 982 | *prevptr = SLIST_NEXT(pv, pv_link); /* remove it! */ |
983 | if (pm == pmap_kernel()) { | | 983 | if (pm == pmap_kernel()) { |
984 | PMAPCOUNT(kernel_unmappings); | | 984 | PMAPCOUNT(kernel_unmappings); |
985 | if (pv->pv_flags & PVF_WRITE) | | 985 | if (pv->pv_flags & PVF_WRITE) |
986 | md->krw_mappings--; | | 986 | md->krw_mappings--; |
987 | else | | 987 | else |
988 | md->kro_mappings--; | | 988 | md->kro_mappings--; |
989 | } else { | | 989 | } else { |
990 | if (pv->pv_flags & PVF_WRITE) | | 990 | if (pv->pv_flags & PVF_WRITE) |
991 | md->urw_mappings--; | | 991 | md->urw_mappings--; |
992 | else | | 992 | else |
993 | md->uro_mappings--; | | 993 | md->uro_mappings--; |
994 | } | | 994 | } |
995 | | | 995 | |
996 | PMAPCOUNT(unmappings); | | 996 | PMAPCOUNT(unmappings); |
997 | #ifdef PMAP_CACHE_VIPT | | 997 | #ifdef PMAP_CACHE_VIPT |
998 | if (!(pv->pv_flags & PVF_WRITE)) | | 998 | if (!(pv->pv_flags & PVF_WRITE)) |
999 | break; | | 999 | break; |
1000 | /* | | 1000 | /* |
1001 | * If this page has had an exec mapping, then if | | 1001 | * If this page has had an exec mapping, then if |
1002 | * this was the last mapping, discard the contents, | | 1002 | * this was the last mapping, discard the contents, |
1003 | * otherwise sync the i-cache for this page. | | 1003 | * otherwise sync the i-cache for this page. |
1004 | */ | | 1004 | */ |
1005 | if (PV_IS_EXEC_P(md->pvh_attrs)) { | | 1005 | if (PV_IS_EXEC_P(md->pvh_attrs)) { |
1006 | if (SLIST_EMPTY(&md->pvh_list)) { | | 1006 | if (SLIST_EMPTY(&md->pvh_list)) { |
1007 | md->pvh_attrs &= ~PVF_EXEC; | | 1007 | md->pvh_attrs &= ~PVF_EXEC; |
1008 | PMAPCOUNT(exec_discarded_unmap); | | 1008 | PMAPCOUNT(exec_discarded_unmap); |
1009 | } else { | | 1009 | } else { |
1010 | pmap_syncicache_page(md, pa); | | 1010 | pmap_syncicache_page(md, pa); |
1011 | PMAPCOUNT(exec_synced_unmap); | | 1011 | PMAPCOUNT(exec_synced_unmap); |
1012 | } | | 1012 | } |
1013 | } | | 1013 | } |
1014 | #endif /* PMAP_CACHE_VIPT */ | | 1014 | #endif /* PMAP_CACHE_VIPT */ |
1015 | break; | | 1015 | break; |
1016 | } | | 1016 | } |
1017 | prevptr = &SLIST_NEXT(pv, pv_link); /* previous pointer */ | | 1017 | prevptr = &SLIST_NEXT(pv, pv_link); /* previous pointer */ |
1018 | pv = *prevptr; /* advance */ | | 1018 | pv = *prevptr; /* advance */ |
1019 | } | | 1019 | } |
1020 | | | 1020 | |
1021 | #ifdef PMAP_CACHE_VIPT | | 1021 | #ifdef PMAP_CACHE_VIPT |
1022 | /* | | 1022 | /* |
1023 | * If we no longer have a WRITEABLE KENTRY at the head of list, | | 1023 | * If we no longer have a WRITEABLE KENTRY at the head of list, |
1024 | * clear the KMOD attribute from the page. | | 1024 | * clear the KMOD attribute from the page. |
1025 | */ | | 1025 | */ |
1026 | if (SLIST_FIRST(&md->pvh_list) == NULL | | 1026 | if (SLIST_FIRST(&md->pvh_list) == NULL |
1027 | || (SLIST_FIRST(&md->pvh_list)->pv_flags & PVF_KWRITE) != PVF_KWRITE) | | 1027 | || (SLIST_FIRST(&md->pvh_list)->pv_flags & PVF_KWRITE) != PVF_KWRITE) |
1028 | md->pvh_attrs &= ~PVF_KMOD; | | 1028 | md->pvh_attrs &= ~PVF_KMOD; |
1029 | | | 1029 | |
1030 | /* | | 1030 | /* |
1031 | * If this was a writeable page and there are no more writeable | | 1031 | * If this was a writeable page and there are no more writeable |
1032 | * mappings (ignoring KMPAGE), clear the WRITE flag and writeback | | 1032 | * mappings (ignoring KMPAGE), clear the WRITE flag and writeback |
1033 | * the contents to memory. | | 1033 | * the contents to memory. |
1034 | */ | | 1034 | */ |
1035 | if (md->krw_mappings + md->urw_mappings == 0) | | 1035 | if (md->krw_mappings + md->urw_mappings == 0) |
1036 | md->pvh_attrs &= ~PVF_WRITE; | | 1036 | md->pvh_attrs &= ~PVF_WRITE; |
1037 | KASSERT((md->pvh_attrs & PVF_DMOD) == 0 || (md->pvh_attrs & (PVF_DIRTY|PVF_NC))); | | 1037 | KASSERT((md->pvh_attrs & PVF_DMOD) == 0 || (md->pvh_attrs & (PVF_DIRTY|PVF_NC))); |
1038 | #endif /* PMAP_CACHE_VIPT */ | | 1038 | #endif /* PMAP_CACHE_VIPT */ |
1039 | | | 1039 | |
1040 | return(pv); /* return removed pv */ | | 1040 | return(pv); /* return removed pv */ |
1041 | } | | 1041 | } |
1042 | | | 1042 | |
1043 | /* | | 1043 | /* |
1044 | * | | 1044 | * |
1045 | * pmap_modify_pv: Update pv flags | | 1045 | * pmap_modify_pv: Update pv flags |
1046 | * | | 1046 | * |
1047 | * => caller should hold lock on vm_page [so that attrs can be adjusted] | | 1047 | * => caller should hold lock on vm_page [so that attrs can be adjusted] |
1048 | * => caller should NOT adjust pmap's wire_count | | 1048 | * => caller should NOT adjust pmap's wire_count |
1049 | * => caller must call pmap_vac_me_harder() if writable status of a page | | 1049 | * => caller must call pmap_vac_me_harder() if writable status of a page |
1050 | * may have changed. | | 1050 | * may have changed. |
1051 | * => we return the old flags | | 1051 | * => we return the old flags |
1052 | * | | 1052 | * |
1053 | * Modify a physical-virtual mapping in the pv table | | 1053 | * Modify a physical-virtual mapping in the pv table |
1054 | */ | | 1054 | */ |
1055 | static u_int | | 1055 | static u_int |
1056 | pmap_modify_pv(struct vm_page_md *md, paddr_t pa, pmap_t pm, vaddr_t va, | | 1056 | pmap_modify_pv(struct vm_page_md *md, paddr_t pa, pmap_t pm, vaddr_t va, |
1057 | u_int clr_mask, u_int set_mask) | | 1057 | u_int clr_mask, u_int set_mask) |
1058 | { | | 1058 | { |
1059 | struct pv_entry *npv; | | 1059 | struct pv_entry *npv; |
1060 | u_int flags, oflags; | | 1060 | u_int flags, oflags; |
1061 | | | 1061 | |
1062 | KASSERT((clr_mask & PVF_KENTRY) == 0); | | 1062 | KASSERT((clr_mask & PVF_KENTRY) == 0); |
1063 | KASSERT((set_mask & PVF_KENTRY) == 0); | | 1063 | KASSERT((set_mask & PVF_KENTRY) == 0); |
1064 | | | 1064 | |
1065 | if ((npv = pmap_find_pv(md, pm, va)) == NULL) | | 1065 | if ((npv = pmap_find_pv(md, pm, va)) == NULL) |
1066 | return (0); | | 1066 | return (0); |
1067 | | | 1067 | |
1068 | NPDEBUG(PDB_PVDUMP, | | 1068 | NPDEBUG(PDB_PVDUMP, |
1069 | printf("pmap_modify_pv: pm %p, md %p, clr 0x%x, set 0x%x, flags 0x%x\n", pm, md, clr_mask, set_mask, npv->pv_flags)); | | 1069 | printf("pmap_modify_pv: pm %p, md %p, clr 0x%x, set 0x%x, flags 0x%x\n", pm, md, clr_mask, set_mask, npv->pv_flags)); |
1070 | | | 1070 | |
1071 | /* | | 1071 | /* |
1072 | * There is at least one VA mapping this page. | | 1072 | * There is at least one VA mapping this page. |
1073 | */ | | 1073 | */ |
1074 | | | 1074 | |
1075 | if (clr_mask & (PVF_REF | PVF_MOD)) { | | 1075 | if (clr_mask & (PVF_REF | PVF_MOD)) { |
1076 | md->pvh_attrs |= set_mask & (PVF_REF | PVF_MOD); | | 1076 | md->pvh_attrs |= set_mask & (PVF_REF | PVF_MOD); |
1077 | #ifdef PMAP_CACHE_VIPT | | 1077 | #ifdef PMAP_CACHE_VIPT |
1078 | if ((md->pvh_attrs & (PVF_DMOD|PVF_NC)) != PVF_NC) | | 1078 | if ((md->pvh_attrs & (PVF_DMOD|PVF_NC)) != PVF_NC) |
1079 | md->pvh_attrs |= PVF_DIRTY; | | 1079 | md->pvh_attrs |= PVF_DIRTY; |
1080 | KASSERT((md->pvh_attrs & PVF_DMOD) == 0 || (md->pvh_attrs & (PVF_DIRTY|PVF_NC))); | | 1080 | KASSERT((md->pvh_attrs & PVF_DMOD) == 0 || (md->pvh_attrs & (PVF_DIRTY|PVF_NC))); |
1081 | #endif | | 1081 | #endif |
1082 | } | | 1082 | } |
1083 | | | 1083 | |
1084 | oflags = npv->pv_flags; | | 1084 | oflags = npv->pv_flags; |
1085 | npv->pv_flags = flags = (oflags & ~clr_mask) | set_mask; | | 1085 | npv->pv_flags = flags = (oflags & ~clr_mask) | set_mask; |
1086 | | | 1086 | |
1087 | if ((flags ^ oflags) & PVF_WIRED) { | | 1087 | if ((flags ^ oflags) & PVF_WIRED) { |
1088 | if (flags & PVF_WIRED) | | 1088 | if (flags & PVF_WIRED) |
1089 | ++pm->pm_stats.wired_count; | | 1089 | ++pm->pm_stats.wired_count; |
1090 | else | | 1090 | else |
1091 | --pm->pm_stats.wired_count; | | 1091 | --pm->pm_stats.wired_count; |
1092 | } | | 1092 | } |
1093 | | | 1093 | |
1094 | if ((flags ^ oflags) & PVF_WRITE) { | | 1094 | if ((flags ^ oflags) & PVF_WRITE) { |
1095 | if (pm == pmap_kernel()) { | | 1095 | if (pm == pmap_kernel()) { |
1096 | if (flags & PVF_WRITE) { | | 1096 | if (flags & PVF_WRITE) { |
1097 | md->krw_mappings++; | | 1097 | md->krw_mappings++; |
1098 | md->kro_mappings--; | | 1098 | md->kro_mappings--; |
1099 | } else { | | 1099 | } else { |
1100 | md->kro_mappings++; | | 1100 | md->kro_mappings++; |
1101 | md->krw_mappings--; | | 1101 | md->krw_mappings--; |
1102 | } | | 1102 | } |
1103 | } else { | | 1103 | } else { |
1104 | if (flags & PVF_WRITE) { | | 1104 | if (flags & PVF_WRITE) { |
1105 | md->urw_mappings++; | | 1105 | md->urw_mappings++; |
1106 | md->uro_mappings--; | | 1106 | md->uro_mappings--; |
1107 | } else { | | 1107 | } else { |
1108 | md->uro_mappings++; | | 1108 | md->uro_mappings++; |
1109 | md->urw_mappings--; | | 1109 | md->urw_mappings--; |
1110 | } | | 1110 | } |
1111 | } | | 1111 | } |
1112 | } | | 1112 | } |
1113 | #ifdef PMAP_CACHE_VIPT | | 1113 | #ifdef PMAP_CACHE_VIPT |
1114 | if (md->urw_mappings + md->krw_mappings == 0) | | 1114 | if (md->urw_mappings + md->krw_mappings == 0) |
1115 | md->pvh_attrs &= ~PVF_WRITE; | | 1115 | md->pvh_attrs &= ~PVF_WRITE; |
1116 | /* | | 1116 | /* |
1117 | * We have two cases here: the first is from enter_pv (new exec | | 1117 | * We have two cases here: the first is from enter_pv (new exec |
1118 | * page), the second is a combined pmap_remove_pv/pmap_enter_pv. | | 1118 | * page), the second is a combined pmap_remove_pv/pmap_enter_pv. |
1119 | * Since in latter, pmap_enter_pv won't do anything, we just have | | 1119 | * Since in latter, pmap_enter_pv won't do anything, we just have |
1120 | * to do what pmap_remove_pv would do. | | 1120 | * to do what pmap_remove_pv would do. |
1121 | */ | | 1121 | */ |
1122 | if ((PV_IS_EXEC_P(flags) && !PV_IS_EXEC_P(md->pvh_attrs)) | | 1122 | if ((PV_IS_EXEC_P(flags) && !PV_IS_EXEC_P(md->pvh_attrs)) |
1123 | || (PV_IS_EXEC_P(md->pvh_attrs) | | 1123 | || (PV_IS_EXEC_P(md->pvh_attrs) |
1124 | || (!(flags & PVF_WRITE) && (oflags & PVF_WRITE)))) { | | 1124 | || (!(flags & PVF_WRITE) && (oflags & PVF_WRITE)))) { |
1125 | pmap_syncicache_page(md, pa); | | 1125 | pmap_syncicache_page(md, pa); |
1126 | PMAPCOUNT(exec_synced_remap); | | 1126 | PMAPCOUNT(exec_synced_remap); |
1127 | } | | 1127 | } |
1128 | KASSERT((md->pvh_attrs & PVF_DMOD) == 0 || (md->pvh_attrs & (PVF_DIRTY|PVF_NC))); | | 1128 | KASSERT((md->pvh_attrs & PVF_DMOD) == 0 || (md->pvh_attrs & (PVF_DIRTY|PVF_NC))); |
1129 | #endif | | 1129 | #endif |
1130 | | | 1130 | |
1131 | PMAPCOUNT(remappings); | | 1131 | PMAPCOUNT(remappings); |
1132 | | | 1132 | |
1133 | return (oflags); | | 1133 | return (oflags); |
1134 | } | | 1134 | } |
1135 | | | 1135 | |
1136 | /* | | 1136 | /* |
1137 | * Allocate an L1 translation table for the specified pmap. | | 1137 | * Allocate an L1 translation table for the specified pmap. |
1138 | * This is called at pmap creation time. | | 1138 | * This is called at pmap creation time. |
1139 | */ | | 1139 | */ |
1140 | static void | | 1140 | static void |
1141 | pmap_alloc_l1(pmap_t pm) | | 1141 | pmap_alloc_l1(pmap_t pm) |
1142 | { | | 1142 | { |
1143 | struct l1_ttable *l1; | | 1143 | struct l1_ttable *l1; |
1144 | u_int8_t domain; | | 1144 | u_int8_t domain; |
1145 | | | 1145 | |
1146 | /* | | 1146 | /* |
1147 | * Remove the L1 at the head of the LRU list | | 1147 | * Remove the L1 at the head of the LRU list |
1148 | */ | | 1148 | */ |
1149 | simple_lock(&l1_lru_lock); | | 1149 | simple_lock(&l1_lru_lock); |
1150 | l1 = TAILQ_FIRST(&l1_lru_list); | | 1150 | l1 = TAILQ_FIRST(&l1_lru_list); |
1151 | KDASSERT(l1 != NULL); | | 1151 | KDASSERT(l1 != NULL); |
1152 | TAILQ_REMOVE(&l1_lru_list, l1, l1_lru); | | 1152 | TAILQ_REMOVE(&l1_lru_list, l1, l1_lru); |
1153 | | | 1153 | |
1154 | /* | | 1154 | /* |
1155 | * Pick the first available domain number, and update | | 1155 | * Pick the first available domain number, and update |
1156 | * the link to the next number. | | 1156 | * the link to the next number. |
1157 | */ | | 1157 | */ |
1158 | domain = l1->l1_domain_first; | | 1158 | domain = l1->l1_domain_first; |
1159 | l1->l1_domain_first = l1->l1_domain_free[domain]; | | 1159 | l1->l1_domain_first = l1->l1_domain_free[domain]; |
1160 | | | 1160 | |
1161 | /* | | 1161 | /* |
1162 | * If there are still free domain numbers in this L1, | | 1162 | * If there are still free domain numbers in this L1, |
1163 | * put it back on the TAIL of the LRU list. | | 1163 | * put it back on the TAIL of the LRU list. |
1164 | */ | | 1164 | */ |
1165 | if (++l1->l1_domain_use_count < PMAP_DOMAINS) | | 1165 | if (++l1->l1_domain_use_count < PMAP_DOMAINS) |
1166 | TAILQ_INSERT_TAIL(&l1_lru_list, l1, l1_lru); | | 1166 | TAILQ_INSERT_TAIL(&l1_lru_list, l1, l1_lru); |
1167 | | | 1167 | |
1168 | simple_unlock(&l1_lru_lock); | | 1168 | simple_unlock(&l1_lru_lock); |
1169 | | | 1169 | |
1170 | /* | | 1170 | /* |
1171 | * Fix up the relevant bits in the pmap structure | | 1171 | * Fix up the relevant bits in the pmap structure |
1172 | */ | | 1172 | */ |
1173 | pm->pm_l1 = l1; | | 1173 | pm->pm_l1 = l1; |
1174 | pm->pm_domain = domain; | | 1174 | pm->pm_domain = domain; |
1175 | } | | 1175 | } |
1176 | | | 1176 | |
1177 | /* | | 1177 | /* |
1178 | * Free an L1 translation table. | | 1178 | * Free an L1 translation table. |
1179 | * This is called at pmap destruction time. | | 1179 | * This is called at pmap destruction time. |
1180 | */ | | 1180 | */ |
1181 | static void | | 1181 | static void |
1182 | pmap_free_l1(pmap_t pm) | | 1182 | pmap_free_l1(pmap_t pm) |
1183 | { | | 1183 | { |
1184 | struct l1_ttable *l1 = pm->pm_l1; | | 1184 | struct l1_ttable *l1 = pm->pm_l1; |
1185 | | | 1185 | |
1186 | simple_lock(&l1_lru_lock); | | 1186 | simple_lock(&l1_lru_lock); |
1187 | | | 1187 | |
1188 | /* | | 1188 | /* |
1189 | * If this L1 is currently on the LRU list, remove it. | | 1189 | * If this L1 is currently on the LRU list, remove it. |
1190 | */ | | 1190 | */ |
1191 | if (l1->l1_domain_use_count < PMAP_DOMAINS) | | 1191 | if (l1->l1_domain_use_count < PMAP_DOMAINS) |
1192 | TAILQ_REMOVE(&l1_lru_list, l1, l1_lru); | | 1192 | TAILQ_REMOVE(&l1_lru_list, l1, l1_lru); |
1193 | | | 1193 | |
1194 | /* | | 1194 | /* |
1195 | * Free up the domain number which was allocated to the pmap | | 1195 | * Free up the domain number which was allocated to the pmap |
1196 | */ | | 1196 | */ |
1197 | l1->l1_domain_free[pm->pm_domain] = l1->l1_domain_first; | | 1197 | l1->l1_domain_free[pm->pm_domain] = l1->l1_domain_first; |
1198 | l1->l1_domain_first = pm->pm_domain; | | 1198 | l1->l1_domain_first = pm->pm_domain; |
1199 | l1->l1_domain_use_count--; | | 1199 | l1->l1_domain_use_count--; |
1200 | | | 1200 | |
1201 | /* | | 1201 | /* |
1202 | * The L1 now must have at least 1 free domain, so add | | 1202 | * The L1 now must have at least 1 free domain, so add |
1203 | * it back to the LRU list. If the use count is zero, | | 1203 | * it back to the LRU list. If the use count is zero, |
1204 | * put it at the head of the list, otherwise it goes | | 1204 | * put it at the head of the list, otherwise it goes |
1205 | * to the tail. | | 1205 | * to the tail. |
1206 | */ | | 1206 | */ |
1207 | if (l1->l1_domain_use_count == 0) | | 1207 | if (l1->l1_domain_use_count == 0) |
1208 | TAILQ_INSERT_HEAD(&l1_lru_list, l1, l1_lru); | | 1208 | TAILQ_INSERT_HEAD(&l1_lru_list, l1, l1_lru); |
1209 | else | | 1209 | else |
1210 | TAILQ_INSERT_TAIL(&l1_lru_list, l1, l1_lru); | | 1210 | TAILQ_INSERT_TAIL(&l1_lru_list, l1, l1_lru); |
1211 | | | 1211 | |
1212 | simple_unlock(&l1_lru_lock); | | 1212 | simple_unlock(&l1_lru_lock); |
1213 | } | | 1213 | } |
| @@ -1581,1999 +1581,1999 @@ pmap_get_vac_flags(const struct vm_page_ | | | @@ -1581,1999 +1581,1999 @@ pmap_get_vac_flags(const struct vm_page_ |
1581 | | | 1581 | |
1582 | kidx = 0; | | 1582 | kidx = 0; |
1583 | if (md->kro_mappings || md->krw_mappings > 1) | | 1583 | if (md->kro_mappings || md->krw_mappings > 1) |
1584 | kidx |= 1; | | 1584 | kidx |= 1; |
1585 | if (md->krw_mappings) | | 1585 | if (md->krw_mappings) |
1586 | kidx |= 2; | | 1586 | kidx |= 2; |
1587 | | | 1587 | |
1588 | uidx = 0; | | 1588 | uidx = 0; |
1589 | if (md->uro_mappings || md->urw_mappings > 1) | | 1589 | if (md->uro_mappings || md->urw_mappings > 1) |
1590 | uidx |= 1; | | 1590 | uidx |= 1; |
1591 | if (md->urw_mappings) | | 1591 | if (md->urw_mappings) |
1592 | uidx |= 2; | | 1592 | uidx |= 2; |
1593 | | | 1593 | |
1594 | return (pmap_vac_flags[uidx][kidx]); | | 1594 | return (pmap_vac_flags[uidx][kidx]); |
1595 | } | | 1595 | } |
1596 | | | 1596 | |
1597 | static inline void | | 1597 | static inline void |
1598 | pmap_vac_me_harder(struct vm_page_md *md, paddr_t pa, pmap_t pm, vaddr_t va) | | 1598 | pmap_vac_me_harder(struct vm_page_md *md, paddr_t pa, pmap_t pm, vaddr_t va) |
1599 | { | | 1599 | { |
1600 | int nattr; | | 1600 | int nattr; |
1601 | | | 1601 | |
1602 | nattr = pmap_get_vac_flags(md); | | 1602 | nattr = pmap_get_vac_flags(md); |
1603 | | | 1603 | |
1604 | if (nattr < 0) { | | 1604 | if (nattr < 0) { |
1605 | md->pvh_attrs &= ~PVF_NC; | | 1605 | md->pvh_attrs &= ~PVF_NC; |
1606 | return; | | 1606 | return; |
1607 | } | | 1607 | } |
1608 | | | 1608 | |
1609 | if (nattr == 0 && (md->pvh_attrs & PVF_NC) == 0) | | 1609 | if (nattr == 0 && (md->pvh_attrs & PVF_NC) == 0) |
1610 | return; | | 1610 | return; |
1611 | | | 1611 | |
1612 | if (pm == pmap_kernel()) | | 1612 | if (pm == pmap_kernel()) |
1613 | pmap_vac_me_kpmap(md, pa, pm, va); | | 1613 | pmap_vac_me_kpmap(md, pa, pm, va); |
1614 | else | | 1614 | else |
1615 | pmap_vac_me_user(md, pa, pm, va); | | 1615 | pmap_vac_me_user(md, pa, pm, va); |
1616 | | | 1616 | |
1617 | md->pvh_attrs = (md->pvh_attrs & ~PVF_NC) | nattr; | | 1617 | md->pvh_attrs = (md->pvh_attrs & ~PVF_NC) | nattr; |
1618 | } | | 1618 | } |
1619 | | | 1619 | |
1620 | static void | | 1620 | static void |
1621 | pmap_vac_me_kpmap(struct vm_page_md *md, paddr_t pa, pmap_t pm, vaddr_t va) | | 1621 | pmap_vac_me_kpmap(struct vm_page_md *md, paddr_t pa, pmap_t pm, vaddr_t va) |
1622 | { | | 1622 | { |
1623 | u_int u_cacheable, u_entries; | | 1623 | u_int u_cacheable, u_entries; |
1624 | struct pv_entry *pv; | | 1624 | struct pv_entry *pv; |
1625 | pmap_t last_pmap = pm; | | 1625 | pmap_t last_pmap = pm; |
1626 | | | 1626 | |
1627 | /* | | 1627 | /* |
1628 | * Pass one, see if there are both kernel and user pmaps for | | 1628 | * Pass one, see if there are both kernel and user pmaps for |
1629 | * this page. Calculate whether there are user-writable or | | 1629 | * this page. Calculate whether there are user-writable or |
1630 | * kernel-writable pages. | | 1630 | * kernel-writable pages. |
1631 | */ | | 1631 | */ |
1632 | u_cacheable = 0; | | 1632 | u_cacheable = 0; |
1633 | SLIST_FOREACH(pv, &md->pvh_list, pv_link) { | | 1633 | SLIST_FOREACH(pv, &md->pvh_list, pv_link) { |
1634 | if (pv->pv_pmap != pm && (pv->pv_flags & PVF_NC) == 0) | | 1634 | if (pv->pv_pmap != pm && (pv->pv_flags & PVF_NC) == 0) |
1635 | u_cacheable++; | | 1635 | u_cacheable++; |
1636 | } | | 1636 | } |
1637 | | | 1637 | |
1638 | u_entries = md->urw_mappings + md->uro_mappings; | | 1638 | u_entries = md->urw_mappings + md->uro_mappings; |
1639 | | | 1639 | |
1640 | /* | | 1640 | /* |
1641 | * We know we have just been updating a kernel entry, so if | | 1641 | * We know we have just been updating a kernel entry, so if |
1642 | * all user pages are already cacheable, then there is nothing | | 1642 | * all user pages are already cacheable, then there is nothing |
1643 | * further to do. | | 1643 | * further to do. |
1644 | */ | | 1644 | */ |
1645 | if (md->k_mappings == 0 && u_cacheable == u_entries) | | 1645 | if (md->k_mappings == 0 && u_cacheable == u_entries) |
1646 | return; | | 1646 | return; |
1647 | | | 1647 | |
1648 | if (u_entries) { | | 1648 | if (u_entries) { |
1649 | /* | | 1649 | /* |
1650 | * Scan over the list again, for each entry, if it | | 1650 | * Scan over the list again, for each entry, if it |
1651 | * might not be set correctly, call pmap_vac_me_user | | 1651 | * might not be set correctly, call pmap_vac_me_user |
1652 | * to recalculate the settings. | | 1652 | * to recalculate the settings. |
1653 | */ | | 1653 | */ |
1654 | SLIST_FOREACH(pv, &md->pvh_list, pv_link) { | | 1654 | SLIST_FOREACH(pv, &md->pvh_list, pv_link) { |
1655 | /* | | 1655 | /* |
1656 | * We know kernel mappings will get set | | 1656 | * We know kernel mappings will get set |
1657 | * correctly in other calls. We also know | | 1657 | * correctly in other calls. We also know |
1658 | * that if the pmap is the same as last_pmap | | 1658 | * that if the pmap is the same as last_pmap |
1659 | * then we've just handled this entry. | | 1659 | * then we've just handled this entry. |
1660 | */ | | 1660 | */ |
1661 | if (pv->pv_pmap == pm || pv->pv_pmap == last_pmap) | | 1661 | if (pv->pv_pmap == pm || pv->pv_pmap == last_pmap) |
1662 | continue; | | 1662 | continue; |
1663 | | | 1663 | |
1664 | /* | | 1664 | /* |
1665 | * If there are kernel entries and this page | | 1665 | * If there are kernel entries and this page |
1666 | * is writable but non-cacheable, then we can | | 1666 | * is writable but non-cacheable, then we can |
1667 | * skip this entry also. | | 1667 | * skip this entry also. |
1668 | */ | | 1668 | */ |
1669 | if (md->k_mappings && | | 1669 | if (md->k_mappings && |
1670 | (pv->pv_flags & (PVF_NC | PVF_WRITE)) == | | 1670 | (pv->pv_flags & (PVF_NC | PVF_WRITE)) == |
1671 | (PVF_NC | PVF_WRITE)) | | 1671 | (PVF_NC | PVF_WRITE)) |
1672 | continue; | | 1672 | continue; |
1673 | | | 1673 | |
1674 | /* | | 1674 | /* |
1675 | * Similarly if there are no kernel-writable | | 1675 | * Similarly if there are no kernel-writable |
1676 | * entries and the page is already | | 1676 | * entries and the page is already |
1677 | * read-only/cacheable. | | 1677 | * read-only/cacheable. |
1678 | */ | | 1678 | */ |
1679 | if (md->krw_mappings == 0 && | | 1679 | if (md->krw_mappings == 0 && |
1680 | (pv->pv_flags & (PVF_NC | PVF_WRITE)) == 0) | | 1680 | (pv->pv_flags & (PVF_NC | PVF_WRITE)) == 0) |
1681 | continue; | | 1681 | continue; |
1682 | | | 1682 | |
1683 | /* | | 1683 | /* |
1684 | * For some of the remaining cases, we know | | 1684 | * For some of the remaining cases, we know |
1685 | * that we must recalculate, but for others we | | 1685 | * that we must recalculate, but for others we |
1686 | * can't tell if they are correct or not, so | | 1686 | * can't tell if they are correct or not, so |
1687 | * we recalculate anyway. | | 1687 | * we recalculate anyway. |
1688 | */ | | 1688 | */ |
1689 | pmap_vac_me_user(md, pa, (last_pmap = pv->pv_pmap), 0); | | 1689 | pmap_vac_me_user(md, pa, (last_pmap = pv->pv_pmap), 0); |
1690 | } | | 1690 | } |
1691 | | | 1691 | |
1692 | if (md->k_mappings == 0) | | 1692 | if (md->k_mappings == 0) |
1693 | return; | | 1693 | return; |
1694 | } | | 1694 | } |
1695 | | | 1695 | |
1696 | pmap_vac_me_user(md, pa, pm, va); | | 1696 | pmap_vac_me_user(md, pa, pm, va); |
1697 | } | | 1697 | } |
1698 | | | 1698 | |
1699 | static void | | 1699 | static void |
1700 | pmap_vac_me_user(struct vm_page_md *md, paddr_t pa, pmap_t pm, vaddr_t va) | | 1700 | pmap_vac_me_user(struct vm_page_md *md, paddr_t pa, pmap_t pm, vaddr_t va) |
1701 | { | | 1701 | { |
1702 | pmap_t kpmap = pmap_kernel(); | | 1702 | pmap_t kpmap = pmap_kernel(); |
1703 | struct pv_entry *pv, *npv = NULL; | | 1703 | struct pv_entry *pv, *npv = NULL; |
1704 | struct l2_bucket *l2b; | | 1704 | struct l2_bucket *l2b; |
1705 | pt_entry_t *ptep, pte; | | 1705 | pt_entry_t *ptep, pte; |
1706 | u_int entries = 0; | | 1706 | u_int entries = 0; |
1707 | u_int writable = 0; | | 1707 | u_int writable = 0; |
1708 | u_int cacheable_entries = 0; | | 1708 | u_int cacheable_entries = 0; |
1709 | u_int kern_cacheable = 0; | | 1709 | u_int kern_cacheable = 0; |
1710 | u_int other_writable = 0; | | 1710 | u_int other_writable = 0; |
1711 | | | 1711 | |
1712 | /* | | 1712 | /* |
1713 | * Count mappings and writable mappings in this pmap. | | 1713 | * Count mappings and writable mappings in this pmap. |
1714 | * Include kernel mappings as part of our own. | | 1714 | * Include kernel mappings as part of our own. |
1715 | * Keep a pointer to the first one. | | 1715 | * Keep a pointer to the first one. |
1716 | */ | | 1716 | */ |
1717 | npv = NULL; | | 1717 | npv = NULL; |
1718 | SLIST_FOREACH(pv, &md->pvh_list, pv_link) { | | 1718 | SLIST_FOREACH(pv, &md->pvh_list, pv_link) { |
1719 | /* Count mappings in the same pmap */ | | 1719 | /* Count mappings in the same pmap */ |
1720 | if (pm == pv->pv_pmap || kpmap == pv->pv_pmap) { | | 1720 | if (pm == pv->pv_pmap || kpmap == pv->pv_pmap) { |
1721 | if (entries++ == 0) | | 1721 | if (entries++ == 0) |
1722 | npv = pv; | | 1722 | npv = pv; |
1723 | | | 1723 | |
1724 | /* Cacheable mappings */ | | 1724 | /* Cacheable mappings */ |
1725 | if ((pv->pv_flags & PVF_NC) == 0) { | | 1725 | if ((pv->pv_flags & PVF_NC) == 0) { |
1726 | cacheable_entries++; | | 1726 | cacheable_entries++; |
1727 | if (kpmap == pv->pv_pmap) | | 1727 | if (kpmap == pv->pv_pmap) |
1728 | kern_cacheable++; | | 1728 | kern_cacheable++; |
1729 | } | | 1729 | } |
1730 | | | 1730 | |
1731 | /* Writable mappings */ | | 1731 | /* Writable mappings */ |
1732 | if (pv->pv_flags & PVF_WRITE) | | 1732 | if (pv->pv_flags & PVF_WRITE) |
1733 | ++writable; | | 1733 | ++writable; |
1734 | } else | | 1734 | } else |
1735 | if (pv->pv_flags & PVF_WRITE) | | 1735 | if (pv->pv_flags & PVF_WRITE) |
1736 | other_writable = 1; | | 1736 | other_writable = 1; |
1737 | } | | 1737 | } |
1738 | | | 1738 | |
1739 | /* | | 1739 | /* |
1740 | * Enable or disable caching as necessary. | | 1740 | * Enable or disable caching as necessary. |
1741 | * Note: the first entry might be part of the kernel pmap, | | 1741 | * Note: the first entry might be part of the kernel pmap, |
1742 | * so we can't assume this is indicative of the state of the | | 1742 | * so we can't assume this is indicative of the state of the |
1743 | * other (maybe non-kpmap) entries. | | 1743 | * other (maybe non-kpmap) entries. |
1744 | */ | | 1744 | */ |
1745 | if ((entries > 1 && writable) || | | 1745 | if ((entries > 1 && writable) || |
1746 | (entries > 0 && pm == kpmap && other_writable)) { | | 1746 | (entries > 0 && pm == kpmap && other_writable)) { |
1747 | if (cacheable_entries == 0) | | 1747 | if (cacheable_entries == 0) |
1748 | return; | | 1748 | return; |
1749 | | | 1749 | |
1750 | for (pv = npv; pv; pv = SLIST_NEXT(pv, pv_link)) { | | 1750 | for (pv = npv; pv; pv = SLIST_NEXT(pv, pv_link)) { |
1751 | if ((pm != pv->pv_pmap && kpmap != pv->pv_pmap) || | | 1751 | if ((pm != pv->pv_pmap && kpmap != pv->pv_pmap) || |
1752 | (pv->pv_flags & PVF_NC)) | | 1752 | (pv->pv_flags & PVF_NC)) |
1753 | continue; | | 1753 | continue; |
1754 | | | 1754 | |
1755 | pv->pv_flags |= PVF_NC; | | 1755 | pv->pv_flags |= PVF_NC; |
1756 | | | 1756 | |
1757 | l2b = pmap_get_l2_bucket(pv->pv_pmap, pv->pv_va); | | 1757 | l2b = pmap_get_l2_bucket(pv->pv_pmap, pv->pv_va); |
1758 | KDASSERT(l2b != NULL); | | 1758 | KDASSERT(l2b != NULL); |
1759 | ptep = &l2b->l2b_kva[l2pte_index(pv->pv_va)]; | | 1759 | ptep = &l2b->l2b_kva[l2pte_index(pv->pv_va)]; |
1760 | pte = *ptep & ~L2_S_CACHE_MASK; | | 1760 | pte = *ptep & ~L2_S_CACHE_MASK; |
1761 | | | 1761 | |
1762 | if ((va != pv->pv_va || pm != pv->pv_pmap) && | | 1762 | if ((va != pv->pv_va || pm != pv->pv_pmap) && |
1763 | l2pte_valid(pte)) { | | 1763 | l2pte_valid(pte)) { |
1764 | if (PV_BEEN_EXECD(pv->pv_flags)) { | | 1764 | if (PV_BEEN_EXECD(pv->pv_flags)) { |
1765 | #ifdef PMAP_CACHE_VIVT | | 1765 | #ifdef PMAP_CACHE_VIVT |
1766 | pmap_idcache_wbinv_range(pv->pv_pmap, | | 1766 | pmap_idcache_wbinv_range(pv->pv_pmap, |
1767 | pv->pv_va, PAGE_SIZE); | | 1767 | pv->pv_va, PAGE_SIZE); |
1768 | #endif | | 1768 | #endif |
1769 | pmap_tlb_flushID_SE(pv->pv_pmap, | | 1769 | pmap_tlb_flushID_SE(pv->pv_pmap, |
1770 | pv->pv_va); | | 1770 | pv->pv_va); |
1771 | } else | | 1771 | } else |
1772 | if (PV_BEEN_REFD(pv->pv_flags)) { | | 1772 | if (PV_BEEN_REFD(pv->pv_flags)) { |
1773 | #ifdef PMAP_CACHE_VIVT | | 1773 | #ifdef PMAP_CACHE_VIVT |
1774 | pmap_dcache_wb_range(pv->pv_pmap, | | 1774 | pmap_dcache_wb_range(pv->pv_pmap, |
1775 | pv->pv_va, PAGE_SIZE, true, | | 1775 | pv->pv_va, PAGE_SIZE, true, |
1776 | (pv->pv_flags & PVF_WRITE) == 0); | | 1776 | (pv->pv_flags & PVF_WRITE) == 0); |
1777 | #endif | | 1777 | #endif |
1778 | pmap_tlb_flushD_SE(pv->pv_pmap, | | 1778 | pmap_tlb_flushD_SE(pv->pv_pmap, |
1779 | pv->pv_va); | | 1779 | pv->pv_va); |
1780 | } | | 1780 | } |
1781 | } | | 1781 | } |
1782 | | | 1782 | |
1783 | *ptep = pte; | | 1783 | *ptep = pte; |
1784 | PTE_SYNC_CURRENT(pv->pv_pmap, ptep); | | 1784 | PTE_SYNC_CURRENT(pv->pv_pmap, ptep); |
1785 | } | | 1785 | } |
1786 | cpu_cpwait(); | | 1786 | cpu_cpwait(); |
1787 | } else | | 1787 | } else |
1788 | if (entries > cacheable_entries) { | | 1788 | if (entries > cacheable_entries) { |
1789 | /* | | 1789 | /* |
1790 | * Turn cacheing back on for some pages. If it is a kernel | | 1790 | * Turn cacheing back on for some pages. If it is a kernel |
1791 | * page, only do so if there are no other writable pages. | | 1791 | * page, only do so if there are no other writable pages. |
1792 | */ | | 1792 | */ |
1793 | for (pv = npv; pv; pv = SLIST_NEXT(pv, pv_link)) { | | 1793 | for (pv = npv; pv; pv = SLIST_NEXT(pv, pv_link)) { |
1794 | if (!(pv->pv_flags & PVF_NC) || (pm != pv->pv_pmap && | | 1794 | if (!(pv->pv_flags & PVF_NC) || (pm != pv->pv_pmap && |
1795 | (kpmap != pv->pv_pmap || other_writable))) | | 1795 | (kpmap != pv->pv_pmap || other_writable))) |
1796 | continue; | | 1796 | continue; |
1797 | | | 1797 | |
1798 | pv->pv_flags &= ~PVF_NC; | | 1798 | pv->pv_flags &= ~PVF_NC; |
1799 | | | 1799 | |
1800 | l2b = pmap_get_l2_bucket(pv->pv_pmap, pv->pv_va); | | 1800 | l2b = pmap_get_l2_bucket(pv->pv_pmap, pv->pv_va); |
1801 | KDASSERT(l2b != NULL); | | 1801 | KDASSERT(l2b != NULL); |
1802 | ptep = &l2b->l2b_kva[l2pte_index(pv->pv_va)]; | | 1802 | ptep = &l2b->l2b_kva[l2pte_index(pv->pv_va)]; |
1803 | pte = (*ptep & ~L2_S_CACHE_MASK) | pte_l2_s_cache_mode; | | 1803 | pte = (*ptep & ~L2_S_CACHE_MASK) | pte_l2_s_cache_mode; |
1804 | | | 1804 | |
1805 | if (l2pte_valid(pte)) { | | 1805 | if (l2pte_valid(pte)) { |
1806 | if (PV_BEEN_EXECD(pv->pv_flags)) { | | 1806 | if (PV_BEEN_EXECD(pv->pv_flags)) { |
1807 | pmap_tlb_flushID_SE(pv->pv_pmap, | | 1807 | pmap_tlb_flushID_SE(pv->pv_pmap, |
1808 | pv->pv_va); | | 1808 | pv->pv_va); |
1809 | } else | | 1809 | } else |
1810 | if (PV_BEEN_REFD(pv->pv_flags)) { | | 1810 | if (PV_BEEN_REFD(pv->pv_flags)) { |
1811 | pmap_tlb_flushD_SE(pv->pv_pmap, | | 1811 | pmap_tlb_flushD_SE(pv->pv_pmap, |
1812 | pv->pv_va); | | 1812 | pv->pv_va); |
1813 | } | | 1813 | } |
1814 | } | | 1814 | } |
1815 | | | 1815 | |
1816 | *ptep = pte; | | 1816 | *ptep = pte; |
1817 | PTE_SYNC_CURRENT(pv->pv_pmap, ptep); | | 1817 | PTE_SYNC_CURRENT(pv->pv_pmap, ptep); |
1818 | } | | 1818 | } |
1819 | } | | 1819 | } |
1820 | } | | 1820 | } |
1821 | #endif | | 1821 | #endif |
1822 | | | 1822 | |
1823 | #ifdef PMAP_CACHE_VIPT | | 1823 | #ifdef PMAP_CACHE_VIPT |
1824 | static void | | 1824 | static void |
1825 | pmap_vac_me_harder(struct vm_page_md *md, paddr_t pa, pmap_t pm, vaddr_t va) | | 1825 | pmap_vac_me_harder(struct vm_page_md *md, paddr_t pa, pmap_t pm, vaddr_t va) |
1826 | { | | 1826 | { |
1827 | struct pv_entry *pv; | | 1827 | struct pv_entry *pv; |
1828 | vaddr_t tst_mask; | | 1828 | vaddr_t tst_mask; |
1829 | bool bad_alias; | | 1829 | bool bad_alias; |
1830 | struct l2_bucket *l2b; | | 1830 | struct l2_bucket *l2b; |
1831 | pt_entry_t *ptep, pte, opte; | | 1831 | pt_entry_t *ptep, pte, opte; |
1832 | const u_int | | 1832 | const u_int |
1833 | rw_mappings = md->urw_mappings + md->krw_mappings, | | 1833 | rw_mappings = md->urw_mappings + md->krw_mappings, |
1834 | ro_mappings = md->uro_mappings + md->kro_mappings; | | 1834 | ro_mappings = md->uro_mappings + md->kro_mappings; |
1835 | | | 1835 | |
1836 | /* do we need to do anything? */ | | 1836 | /* do we need to do anything? */ |
1837 | if (arm_cache_prefer_mask == 0) | | 1837 | if (arm_cache_prefer_mask == 0) |
1838 | return; | | 1838 | return; |
1839 | | | 1839 | |
1840 | NPDEBUG(PDB_VAC, printf("pmap_vac_me_harder: md=%p, pmap=%p va=%08lx\n", | | 1840 | NPDEBUG(PDB_VAC, printf("pmap_vac_me_harder: md=%p, pmap=%p va=%08lx\n", |
1841 | md, pm, va)); | | 1841 | md, pm, va)); |
1842 | | | 1842 | |
1843 | KASSERT(!va || pm); | | 1843 | KASSERT(!va || pm); |
1844 | KASSERT((md->pvh_attrs & PVF_DMOD) == 0 || (md->pvh_attrs & (PVF_DIRTY|PVF_NC))); | | 1844 | KASSERT((md->pvh_attrs & PVF_DMOD) == 0 || (md->pvh_attrs & (PVF_DIRTY|PVF_NC))); |
1845 | | | 1845 | |
1846 | /* Already a conflict? */ | | 1846 | /* Already a conflict? */ |
1847 | if (__predict_false(md->pvh_attrs & PVF_NC)) { | | 1847 | if (__predict_false(md->pvh_attrs & PVF_NC)) { |
1848 | /* just an add, things are already non-cached */ | | 1848 | /* just an add, things are already non-cached */ |
1849 | KASSERT(!(md->pvh_attrs & PVF_DIRTY)); | | 1849 | KASSERT(!(md->pvh_attrs & PVF_DIRTY)); |
1850 | KASSERT(!(md->pvh_attrs & PVF_MULTCLR)); | | 1850 | KASSERT(!(md->pvh_attrs & PVF_MULTCLR)); |
1851 | bad_alias = false; | | 1851 | bad_alias = false; |
1852 | if (va) { | | 1852 | if (va) { |
1853 | PMAPCOUNT(vac_color_none); | | 1853 | PMAPCOUNT(vac_color_none); |
1854 | bad_alias = true; | | 1854 | bad_alias = true; |
1855 | KASSERT((rw_mappings == 0) == !(md->pvh_attrs & PVF_WRITE)); | | 1855 | KASSERT((rw_mappings == 0) == !(md->pvh_attrs & PVF_WRITE)); |
1856 | goto fixup; | | 1856 | goto fixup; |
1857 | } | | 1857 | } |
1858 | pv = SLIST_FIRST(&md->pvh_list); | | 1858 | pv = SLIST_FIRST(&md->pvh_list); |
1859 | /* the list can't be empty because it would be cachable */ | | 1859 | /* the list can't be empty because it would be cachable */ |
1860 | if (md->pvh_attrs & PVF_KMPAGE) { | | 1860 | if (md->pvh_attrs & PVF_KMPAGE) { |
1861 | tst_mask = md->pvh_attrs; | | 1861 | tst_mask = md->pvh_attrs; |
1862 | } else { | | 1862 | } else { |
1863 | KASSERT(pv); | | 1863 | KASSERT(pv); |
1864 | tst_mask = pv->pv_va; | | 1864 | tst_mask = pv->pv_va; |
1865 | pv = SLIST_NEXT(pv, pv_link); | | 1865 | pv = SLIST_NEXT(pv, pv_link); |
1866 | } | | 1866 | } |
1867 | /* | | 1867 | /* |
1868 | * Only check for a bad alias if we have writable mappings. | | 1868 | * Only check for a bad alias if we have writable mappings. |
1869 | */ | | 1869 | */ |
1870 | tst_mask &= arm_cache_prefer_mask; | | 1870 | tst_mask &= arm_cache_prefer_mask; |
1871 | if (rw_mappings > 0 && arm_cache_prefer_mask) { | | 1871 | if (rw_mappings > 0 && arm_cache_prefer_mask) { |
1872 | for (; pv && !bad_alias; pv = SLIST_NEXT(pv, pv_link)) { | | 1872 | for (; pv && !bad_alias; pv = SLIST_NEXT(pv, pv_link)) { |
1873 | /* if there's a bad alias, stop checking. */ | | 1873 | /* if there's a bad alias, stop checking. */ |
1874 | if (tst_mask != (pv->pv_va & arm_cache_prefer_mask)) | | 1874 | if (tst_mask != (pv->pv_va & arm_cache_prefer_mask)) |
1875 | bad_alias = true; | | 1875 | bad_alias = true; |
1876 | } | | 1876 | } |
1877 | md->pvh_attrs |= PVF_WRITE; | | 1877 | md->pvh_attrs |= PVF_WRITE; |
1878 | if (!bad_alias) | | 1878 | if (!bad_alias) |
1879 | md->pvh_attrs |= PVF_DIRTY; | | 1879 | md->pvh_attrs |= PVF_DIRTY; |
1880 | } else { | | 1880 | } else { |
1881 | /* | | 1881 | /* |
1882 | * We have only read-only mappings. Let's see if there | | 1882 | * We have only read-only mappings. Let's see if there |
1883 | * are multiple colors in use or if we mapped a KMPAGE. | | 1883 | * are multiple colors in use or if we mapped a KMPAGE. |
1884 | * If the latter, we have a bad alias. If the former, | | 1884 | * If the latter, we have a bad alias. If the former, |
1885 | * we need to remember that. | | 1885 | * we need to remember that. |
1886 | */ | | 1886 | */ |
1887 | for (; pv; pv = SLIST_NEXT(pv, pv_link)) { | | 1887 | for (; pv; pv = SLIST_NEXT(pv, pv_link)) { |
1888 | if (tst_mask != (pv->pv_va & arm_cache_prefer_mask)) { | | 1888 | if (tst_mask != (pv->pv_va & arm_cache_prefer_mask)) { |
1889 | if (md->pvh_attrs & PVF_KMPAGE) | | 1889 | if (md->pvh_attrs & PVF_KMPAGE) |
1890 | bad_alias = true; | | 1890 | bad_alias = true; |
1891 | break; | | 1891 | break; |
1892 | } | | 1892 | } |
1893 | } | | 1893 | } |
1894 | md->pvh_attrs &= ~PVF_WRITE; | | 1894 | md->pvh_attrs &= ~PVF_WRITE; |
1895 | /* | | 1895 | /* |
1896 | * No KMPAGE and we exited early, so we must have | | 1896 | * No KMPAGE and we exited early, so we must have |
1897 | * multiple color mappings. | | 1897 | * multiple color mappings. |
1898 | */ | | 1898 | */ |
1899 | if (!bad_alias && pv != NULL) | | 1899 | if (!bad_alias && pv != NULL) |
1900 | md->pvh_attrs |= PVF_MULTCLR; | | 1900 | md->pvh_attrs |= PVF_MULTCLR; |
1901 | } | | 1901 | } |
1902 | | | 1902 | |
1903 | /* If no conflicting colors, set everything back to cached */ | | 1903 | /* If no conflicting colors, set everything back to cached */ |
1904 | if (!bad_alias) { | | 1904 | if (!bad_alias) { |
1905 | #ifdef DEBUG | | 1905 | #ifdef DEBUG |
1906 | if ((md->pvh_attrs & PVF_WRITE) | | 1906 | if ((md->pvh_attrs & PVF_WRITE) |
1907 | || ro_mappings < 2) { | | 1907 | || ro_mappings < 2) { |
1908 | SLIST_FOREACH(pv, &md->pvh_list, pv_link) | | 1908 | SLIST_FOREACH(pv, &md->pvh_list, pv_link) |
1909 | KDASSERT(((tst_mask ^ pv->pv_va) & arm_cache_prefer_mask) == 0); | | 1909 | KDASSERT(((tst_mask ^ pv->pv_va) & arm_cache_prefer_mask) == 0); |
1910 | } | | 1910 | } |
1911 | #endif | | 1911 | #endif |
1912 | md->pvh_attrs &= (PAGE_SIZE - 1) & ~PVF_NC; | | 1912 | md->pvh_attrs &= (PAGE_SIZE - 1) & ~PVF_NC; |
1913 | md->pvh_attrs |= tst_mask | PVF_COLORED; | | 1913 | md->pvh_attrs |= tst_mask | PVF_COLORED; |
1914 | /* | | 1914 | /* |
1915 | * Restore DIRTY bit if page is modified | | 1915 | * Restore DIRTY bit if page is modified |
1916 | */ | | 1916 | */ |
1917 | if (md->pvh_attrs & PVF_DMOD) | | 1917 | if (md->pvh_attrs & PVF_DMOD) |
1918 | md->pvh_attrs |= PVF_DIRTY; | | 1918 | md->pvh_attrs |= PVF_DIRTY; |
1919 | PMAPCOUNT(vac_color_restore); | | 1919 | PMAPCOUNT(vac_color_restore); |
1920 | } else { | | 1920 | } else { |
1921 | KASSERT(SLIST_FIRST(&md->pvh_list) != NULL); | | 1921 | KASSERT(SLIST_FIRST(&md->pvh_list) != NULL); |
1922 | KASSERT(SLIST_NEXT(SLIST_FIRST(&md->pvh_list), pv_link) != NULL); | | 1922 | KASSERT(SLIST_NEXT(SLIST_FIRST(&md->pvh_list), pv_link) != NULL); |
1923 | } | | 1923 | } |
1924 | KASSERT((md->pvh_attrs & PVF_DMOD) == 0 || (md->pvh_attrs & (PVF_DIRTY|PVF_NC))); | | 1924 | KASSERT((md->pvh_attrs & PVF_DMOD) == 0 || (md->pvh_attrs & (PVF_DIRTY|PVF_NC))); |
1925 | KASSERT((rw_mappings == 0) == !(md->pvh_attrs & PVF_WRITE)); | | 1925 | KASSERT((rw_mappings == 0) == !(md->pvh_attrs & PVF_WRITE)); |
1926 | } else if (!va) { | | 1926 | } else if (!va) { |
1927 | KASSERT(arm_cache_prefer_mask == 0 || pmap_is_page_colored_p(md)); | | 1927 | KASSERT(arm_cache_prefer_mask == 0 || pmap_is_page_colored_p(md)); |
1928 | KASSERT(!(md->pvh_attrs & PVF_WRITE) | | 1928 | KASSERT(!(md->pvh_attrs & PVF_WRITE) |
1929 | || (md->pvh_attrs & PVF_DIRTY)); | | 1929 | || (md->pvh_attrs & PVF_DIRTY)); |
1930 | if (rw_mappings == 0) { | | 1930 | if (rw_mappings == 0) { |
1931 | md->pvh_attrs &= ~PVF_WRITE; | | 1931 | md->pvh_attrs &= ~PVF_WRITE; |
1932 | if (ro_mappings == 1 | | 1932 | if (ro_mappings == 1 |
1933 | && (md->pvh_attrs & PVF_MULTCLR)) { | | 1933 | && (md->pvh_attrs & PVF_MULTCLR)) { |
1934 | /* | | 1934 | /* |
1935 | * If this is the last readonly mapping | | 1935 | * If this is the last readonly mapping |
1936 | * but it doesn't match the current color | | 1936 | * but it doesn't match the current color |
1937 | * for the page, change the current color | | 1937 | * for the page, change the current color |
1938 | * to match this last readonly mapping. | | 1938 | * to match this last readonly mapping. |
1939 | */ | | 1939 | */ |
1940 | pv = SLIST_FIRST(&md->pvh_list); | | 1940 | pv = SLIST_FIRST(&md->pvh_list); |
1941 | tst_mask = (md->pvh_attrs ^ pv->pv_va) | | 1941 | tst_mask = (md->pvh_attrs ^ pv->pv_va) |
1942 | & arm_cache_prefer_mask; | | 1942 | & arm_cache_prefer_mask; |
1943 | if (tst_mask) { | | 1943 | if (tst_mask) { |
1944 | md->pvh_attrs ^= tst_mask; | | 1944 | md->pvh_attrs ^= tst_mask; |
1945 | PMAPCOUNT(vac_color_change); | | 1945 | PMAPCOUNT(vac_color_change); |
1946 | } | | 1946 | } |
1947 | } | | 1947 | } |
1948 | } | | 1948 | } |
1949 | KASSERT((md->pvh_attrs & PVF_DMOD) == 0 || (md->pvh_attrs & (PVF_DIRTY|PVF_NC))); | | 1949 | KASSERT((md->pvh_attrs & PVF_DMOD) == 0 || (md->pvh_attrs & (PVF_DIRTY|PVF_NC))); |
1950 | KASSERT((rw_mappings == 0) == !(md->pvh_attrs & PVF_WRITE)); | | 1950 | KASSERT((rw_mappings == 0) == !(md->pvh_attrs & PVF_WRITE)); |
1951 | return; | | 1951 | return; |
1952 | } else if (!pmap_is_page_colored_p(md)) { | | 1952 | } else if (!pmap_is_page_colored_p(md)) { |
1953 | /* not colored so we just use its color */ | | 1953 | /* not colored so we just use its color */ |
1954 | KASSERT(md->pvh_attrs & (PVF_WRITE|PVF_DIRTY)); | | 1954 | KASSERT(md->pvh_attrs & (PVF_WRITE|PVF_DIRTY)); |
1955 | KASSERT(!(md->pvh_attrs & PVF_MULTCLR)); | | 1955 | KASSERT(!(md->pvh_attrs & PVF_MULTCLR)); |
1956 | PMAPCOUNT(vac_color_new); | | 1956 | PMAPCOUNT(vac_color_new); |
1957 | md->pvh_attrs &= PAGE_SIZE - 1; | | 1957 | md->pvh_attrs &= PAGE_SIZE - 1; |
1958 | md->pvh_attrs |= PVF_COLORED | | 1958 | md->pvh_attrs |= PVF_COLORED |
1959 | | (va & arm_cache_prefer_mask) | | 1959 | | (va & arm_cache_prefer_mask) |
1960 | | (rw_mappings > 0 ? PVF_WRITE : 0); | | 1960 | | (rw_mappings > 0 ? PVF_WRITE : 0); |
1961 | KASSERT((md->pvh_attrs & PVF_DMOD) == 0 || (md->pvh_attrs & (PVF_DIRTY|PVF_NC))); | | 1961 | KASSERT((md->pvh_attrs & PVF_DMOD) == 0 || (md->pvh_attrs & (PVF_DIRTY|PVF_NC))); |
1962 | KASSERT((rw_mappings == 0) == !(md->pvh_attrs & PVF_WRITE)); | | 1962 | KASSERT((rw_mappings == 0) == !(md->pvh_attrs & PVF_WRITE)); |
1963 | return; | | 1963 | return; |
1964 | } else if (((md->pvh_attrs ^ va) & arm_cache_prefer_mask) == 0) { | | 1964 | } else if (((md->pvh_attrs ^ va) & arm_cache_prefer_mask) == 0) { |
1965 | bad_alias = false; | | 1965 | bad_alias = false; |
1966 | if (rw_mappings > 0) { | | 1966 | if (rw_mappings > 0) { |
1967 | /* | | 1967 | /* |
1968 | * We now have writeable mappings and if we have | | 1968 | * We now have writeable mappings and if we have |
1969 | * readonly mappings in more than once color, we have | | 1969 | * readonly mappings in more than once color, we have |
1970 | * an aliasing problem. Regardless mark the page as | | 1970 | * an aliasing problem. Regardless mark the page as |
1971 | * writeable. | | 1971 | * writeable. |
1972 | */ | | 1972 | */ |
1973 | if (md->pvh_attrs & PVF_MULTCLR) { | | 1973 | if (md->pvh_attrs & PVF_MULTCLR) { |
1974 | if (ro_mappings < 2) { | | 1974 | if (ro_mappings < 2) { |
1975 | /* | | 1975 | /* |
1976 | * If we only have less than two | | 1976 | * If we only have less than two |
1977 | * read-only mappings, just flush the | | 1977 | * read-only mappings, just flush the |
1978 | * non-primary colors from the cache. | | 1978 | * non-primary colors from the cache. |
1979 | */ | | 1979 | */ |
1980 | pmap_flush_page(md, pa, | | 1980 | pmap_flush_page(md, pa, |
1981 | PMAP_FLUSH_SECONDARY); | | 1981 | PMAP_FLUSH_SECONDARY); |
1982 | } else { | | 1982 | } else { |
1983 | bad_alias = true; | | 1983 | bad_alias = true; |
1984 | } | | 1984 | } |
1985 | } | | 1985 | } |
1986 | md->pvh_attrs |= PVF_WRITE; | | 1986 | md->pvh_attrs |= PVF_WRITE; |
1987 | } | | 1987 | } |
1988 | /* If no conflicting colors, set everything back to cached */ | | 1988 | /* If no conflicting colors, set everything back to cached */ |
1989 | if (!bad_alias) { | | 1989 | if (!bad_alias) { |
1990 | #ifdef DEBUG | | 1990 | #ifdef DEBUG |
1991 | if (rw_mappings > 0 | | 1991 | if (rw_mappings > 0 |
1992 | || (md->pvh_attrs & PMAP_KMPAGE)) { | | 1992 | || (md->pvh_attrs & PMAP_KMPAGE)) { |
1993 | tst_mask = md->pvh_attrs & arm_cache_prefer_mask; | | 1993 | tst_mask = md->pvh_attrs & arm_cache_prefer_mask; |
1994 | SLIST_FOREACH(pv, &md->pvh_list, pv_link) | | 1994 | SLIST_FOREACH(pv, &md->pvh_list, pv_link) |
1995 | KDASSERT(((tst_mask ^ pv->pv_va) & arm_cache_prefer_mask) == 0); | | 1995 | KDASSERT(((tst_mask ^ pv->pv_va) & arm_cache_prefer_mask) == 0); |
1996 | } | | 1996 | } |
1997 | #endif | | 1997 | #endif |
1998 | if (SLIST_EMPTY(&md->pvh_list)) | | 1998 | if (SLIST_EMPTY(&md->pvh_list)) |
1999 | PMAPCOUNT(vac_color_reuse); | | 1999 | PMAPCOUNT(vac_color_reuse); |
2000 | else | | 2000 | else |
2001 | PMAPCOUNT(vac_color_ok); | | 2001 | PMAPCOUNT(vac_color_ok); |
2002 | | | 2002 | |
2003 | /* matching color, just return */ | | 2003 | /* matching color, just return */ |
2004 | KASSERT((md->pvh_attrs & PVF_DMOD) == 0 || (md->pvh_attrs & (PVF_DIRTY|PVF_NC))); | | 2004 | KASSERT((md->pvh_attrs & PVF_DMOD) == 0 || (md->pvh_attrs & (PVF_DIRTY|PVF_NC))); |
2005 | KASSERT((rw_mappings == 0) == !(md->pvh_attrs & PVF_WRITE)); | | 2005 | KASSERT((rw_mappings == 0) == !(md->pvh_attrs & PVF_WRITE)); |
2006 | return; | | 2006 | return; |
2007 | } | | 2007 | } |
2008 | KASSERT(SLIST_FIRST(&md->pvh_list) != NULL); | | 2008 | KASSERT(SLIST_FIRST(&md->pvh_list) != NULL); |
2009 | KASSERT(SLIST_NEXT(SLIST_FIRST(&md->pvh_list), pv_link) != NULL); | | 2009 | KASSERT(SLIST_NEXT(SLIST_FIRST(&md->pvh_list), pv_link) != NULL); |
2010 | | | 2010 | |
2011 | /* color conflict. evict from cache. */ | | 2011 | /* color conflict. evict from cache. */ |
2012 | | | 2012 | |
2013 | pmap_flush_page(md, pa, PMAP_FLUSH_PRIMARY); | | 2013 | pmap_flush_page(md, pa, PMAP_FLUSH_PRIMARY); |
2014 | md->pvh_attrs &= ~PVF_COLORED; | | 2014 | md->pvh_attrs &= ~PVF_COLORED; |
2015 | md->pvh_attrs |= PVF_NC; | | 2015 | md->pvh_attrs |= PVF_NC; |
2016 | KASSERT((md->pvh_attrs & PVF_DMOD) == 0 || (md->pvh_attrs & (PVF_DIRTY|PVF_NC))); | | 2016 | KASSERT((md->pvh_attrs & PVF_DMOD) == 0 || (md->pvh_attrs & (PVF_DIRTY|PVF_NC))); |
2017 | KASSERT(!(md->pvh_attrs & PVF_MULTCLR)); | | 2017 | KASSERT(!(md->pvh_attrs & PVF_MULTCLR)); |
2018 | PMAPCOUNT(vac_color_erase); | | 2018 | PMAPCOUNT(vac_color_erase); |
2019 | } else if (rw_mappings == 0 | | 2019 | } else if (rw_mappings == 0 |
2020 | && (md->pvh_attrs & PVF_KMPAGE) == 0) { | | 2020 | && (md->pvh_attrs & PVF_KMPAGE) == 0) { |
2021 | KASSERT((md->pvh_attrs & PVF_WRITE) == 0); | | 2021 | KASSERT((md->pvh_attrs & PVF_WRITE) == 0); |
2022 | | | 2022 | |
2023 | /* | | 2023 | /* |
2024 | * If the page has dirty cache lines, clean it. | | 2024 | * If the page has dirty cache lines, clean it. |
2025 | */ | | 2025 | */ |
2026 | if (md->pvh_attrs & PVF_DIRTY) | | 2026 | if (md->pvh_attrs & PVF_DIRTY) |
2027 | pmap_flush_page(md, pa, PMAP_CLEAN_PRIMARY); | | 2027 | pmap_flush_page(md, pa, PMAP_CLEAN_PRIMARY); |
2028 | | | 2028 | |
2029 | /* | | 2029 | /* |
2030 | * If this is the first remapping (we know that there are no | | 2030 | * If this is the first remapping (we know that there are no |
2031 | * writeable mappings), then this is a simple color change. | | 2031 | * writeable mappings), then this is a simple color change. |
2032 | * Otherwise this is a seconary r/o mapping, which means | | 2032 | * Otherwise this is a seconary r/o mapping, which means |
2033 | * we don't have to do anything. | | 2033 | * we don't have to do anything. |
2034 | */ | | 2034 | */ |
2035 | if (ro_mappings == 1) { | | 2035 | if (ro_mappings == 1) { |
2036 | KASSERT(((md->pvh_attrs ^ va) & arm_cache_prefer_mask) != 0); | | 2036 | KASSERT(((md->pvh_attrs ^ va) & arm_cache_prefer_mask) != 0); |
2037 | md->pvh_attrs &= PAGE_SIZE - 1; | | 2037 | md->pvh_attrs &= PAGE_SIZE - 1; |
2038 | md->pvh_attrs |= (va & arm_cache_prefer_mask); | | 2038 | md->pvh_attrs |= (va & arm_cache_prefer_mask); |
2039 | PMAPCOUNT(vac_color_change); | | 2039 | PMAPCOUNT(vac_color_change); |
2040 | } else { | | 2040 | } else { |
2041 | PMAPCOUNT(vac_color_blind); | | 2041 | PMAPCOUNT(vac_color_blind); |
2042 | } | | 2042 | } |
2043 | md->pvh_attrs |= PVF_MULTCLR; | | 2043 | md->pvh_attrs |= PVF_MULTCLR; |
2044 | KASSERT((md->pvh_attrs & PVF_DMOD) == 0 || (md->pvh_attrs & (PVF_DIRTY|PVF_NC))); | | 2044 | KASSERT((md->pvh_attrs & PVF_DMOD) == 0 || (md->pvh_attrs & (PVF_DIRTY|PVF_NC))); |
2045 | KASSERT((rw_mappings == 0) == !(md->pvh_attrs & PVF_WRITE)); | | 2045 | KASSERT((rw_mappings == 0) == !(md->pvh_attrs & PVF_WRITE)); |
2046 | return; | | 2046 | return; |
2047 | } else { | | 2047 | } else { |
2048 | if (rw_mappings > 0) | | 2048 | if (rw_mappings > 0) |
2049 | md->pvh_attrs |= PVF_WRITE; | | 2049 | md->pvh_attrs |= PVF_WRITE; |
2050 | | | 2050 | |
2051 | /* color conflict. evict from cache. */ | | 2051 | /* color conflict. evict from cache. */ |
2052 | pmap_flush_page(md, pa, PMAP_FLUSH_PRIMARY); | | 2052 | pmap_flush_page(md, pa, PMAP_FLUSH_PRIMARY); |
2053 | | | 2053 | |
2054 | /* the list can't be empty because this was a enter/modify */ | | 2054 | /* the list can't be empty because this was a enter/modify */ |
2055 | pv = SLIST_FIRST(&md->pvh_list); | | 2055 | pv = SLIST_FIRST(&md->pvh_list); |
2056 | if ((md->pvh_attrs & PVF_KMPAGE) == 0) { | | 2056 | if ((md->pvh_attrs & PVF_KMPAGE) == 0) { |
2057 | KASSERT(pv); | | 2057 | KASSERT(pv); |
2058 | /* | | 2058 | /* |
2059 | * If there's only one mapped page, change color to the | | 2059 | * If there's only one mapped page, change color to the |
2060 | * page's new color and return. Restore the DIRTY bit | | 2060 | * page's new color and return. Restore the DIRTY bit |
2061 | * that was erased by pmap_flush_page. | | 2061 | * that was erased by pmap_flush_page. |
2062 | */ | | 2062 | */ |
2063 | if (SLIST_NEXT(pv, pv_link) == NULL) { | | 2063 | if (SLIST_NEXT(pv, pv_link) == NULL) { |
2064 | md->pvh_attrs &= PAGE_SIZE - 1; | | 2064 | md->pvh_attrs &= PAGE_SIZE - 1; |
2065 | md->pvh_attrs |= (va & arm_cache_prefer_mask); | | 2065 | md->pvh_attrs |= (va & arm_cache_prefer_mask); |
2066 | if (md->pvh_attrs & PVF_DMOD) | | 2066 | if (md->pvh_attrs & PVF_DMOD) |
2067 | md->pvh_attrs |= PVF_DIRTY; | | 2067 | md->pvh_attrs |= PVF_DIRTY; |
2068 | PMAPCOUNT(vac_color_change); | | 2068 | PMAPCOUNT(vac_color_change); |
2069 | KASSERT((md->pvh_attrs & PVF_DMOD) == 0 || (md->pvh_attrs & (PVF_DIRTY|PVF_NC))); | | 2069 | KASSERT((md->pvh_attrs & PVF_DMOD) == 0 || (md->pvh_attrs & (PVF_DIRTY|PVF_NC))); |
2070 | KASSERT((rw_mappings == 0) == !(md->pvh_attrs & PVF_WRITE)); | | 2070 | KASSERT((rw_mappings == 0) == !(md->pvh_attrs & PVF_WRITE)); |
2071 | KASSERT(!(md->pvh_attrs & PVF_MULTCLR)); | | 2071 | KASSERT(!(md->pvh_attrs & PVF_MULTCLR)); |
2072 | return; | | 2072 | return; |
2073 | } | | 2073 | } |
2074 | } | | 2074 | } |
2075 | bad_alias = true; | | 2075 | bad_alias = true; |
2076 | md->pvh_attrs &= ~PVF_COLORED; | | 2076 | md->pvh_attrs &= ~PVF_COLORED; |
2077 | md->pvh_attrs |= PVF_NC; | | 2077 | md->pvh_attrs |= PVF_NC; |
2078 | PMAPCOUNT(vac_color_erase); | | 2078 | PMAPCOUNT(vac_color_erase); |
2079 | KASSERT((md->pvh_attrs & PVF_DMOD) == 0 || (md->pvh_attrs & (PVF_DIRTY|PVF_NC))); | | 2079 | KASSERT((md->pvh_attrs & PVF_DMOD) == 0 || (md->pvh_attrs & (PVF_DIRTY|PVF_NC))); |
2080 | } | | 2080 | } |
2081 | | | 2081 | |
2082 | fixup: | | 2082 | fixup: |
2083 | KASSERT((rw_mappings == 0) == !(md->pvh_attrs & PVF_WRITE)); | | 2083 | KASSERT((rw_mappings == 0) == !(md->pvh_attrs & PVF_WRITE)); |
2084 | | | 2084 | |
2085 | /* | | 2085 | /* |
2086 | * Turn cacheing on/off for all pages. | | 2086 | * Turn cacheing on/off for all pages. |
2087 | */ | | 2087 | */ |
2088 | SLIST_FOREACH(pv, &md->pvh_list, pv_link) { | | 2088 | SLIST_FOREACH(pv, &md->pvh_list, pv_link) { |
2089 | l2b = pmap_get_l2_bucket(pv->pv_pmap, pv->pv_va); | | 2089 | l2b = pmap_get_l2_bucket(pv->pv_pmap, pv->pv_va); |
2090 | KDASSERT(l2b != NULL); | | 2090 | KDASSERT(l2b != NULL); |
2091 | ptep = &l2b->l2b_kva[l2pte_index(pv->pv_va)]; | | 2091 | ptep = &l2b->l2b_kva[l2pte_index(pv->pv_va)]; |
2092 | opte = *ptep; | | 2092 | opte = *ptep; |
2093 | pte = opte & ~L2_S_CACHE_MASK; | | 2093 | pte = opte & ~L2_S_CACHE_MASK; |
2094 | if (bad_alias) { | | 2094 | if (bad_alias) { |
2095 | pv->pv_flags |= PVF_NC; | | 2095 | pv->pv_flags |= PVF_NC; |
2096 | } else { | | 2096 | } else { |
2097 | pv->pv_flags &= ~PVF_NC; | | 2097 | pv->pv_flags &= ~PVF_NC; |
2098 | pte |= pte_l2_s_cache_mode; | | 2098 | pte |= pte_l2_s_cache_mode; |
2099 | } | | 2099 | } |
2100 | | | 2100 | |
2101 | if (opte == pte) /* only update is there's a change */ | | 2101 | if (opte == pte) /* only update is there's a change */ |
2102 | continue; | | 2102 | continue; |
2103 | | | 2103 | |
2104 | if (l2pte_valid(pte)) { | | 2104 | if (l2pte_valid(pte)) { |
2105 | if (PV_BEEN_EXECD(pv->pv_flags)) { | | 2105 | if (PV_BEEN_EXECD(pv->pv_flags)) { |
2106 | pmap_tlb_flushID_SE(pv->pv_pmap, pv->pv_va); | | 2106 | pmap_tlb_flushID_SE(pv->pv_pmap, pv->pv_va); |
2107 | } else if (PV_BEEN_REFD(pv->pv_flags)) { | | 2107 | } else if (PV_BEEN_REFD(pv->pv_flags)) { |
2108 | pmap_tlb_flushD_SE(pv->pv_pmap, pv->pv_va); | | 2108 | pmap_tlb_flushD_SE(pv->pv_pmap, pv->pv_va); |
2109 | } | | 2109 | } |
2110 | } | | 2110 | } |
2111 | | | 2111 | |
2112 | *ptep = pte; | | 2112 | *ptep = pte; |
2113 | PTE_SYNC_CURRENT(pv->pv_pmap, ptep); | | 2113 | PTE_SYNC_CURRENT(pv->pv_pmap, ptep); |
2114 | } | | 2114 | } |
2115 | } | | 2115 | } |
2116 | #endif /* PMAP_CACHE_VIPT */ | | 2116 | #endif /* PMAP_CACHE_VIPT */ |
2117 | | | 2117 | |
2118 | | | 2118 | |
2119 | /* | | 2119 | /* |
2120 | * Modify pte bits for all ptes corresponding to the given physical address. | | 2120 | * Modify pte bits for all ptes corresponding to the given physical address. |
2121 | * We use `maskbits' rather than `clearbits' because we're always passing | | 2121 | * We use `maskbits' rather than `clearbits' because we're always passing |
2122 | * constants and the latter would require an extra inversion at run-time. | | 2122 | * constants and the latter would require an extra inversion at run-time. |
2123 | */ | | 2123 | */ |
2124 | static void | | 2124 | static void |
2125 | pmap_clearbit(struct vm_page_md *md, paddr_t pa, u_int maskbits) | | 2125 | pmap_clearbit(struct vm_page_md *md, paddr_t pa, u_int maskbits) |
2126 | { | | 2126 | { |
2127 | struct l2_bucket *l2b; | | 2127 | struct l2_bucket *l2b; |
2128 | struct pv_entry *pv; | | 2128 | struct pv_entry *pv; |
2129 | pt_entry_t *ptep, npte, opte; | | 2129 | pt_entry_t *ptep, npte, opte; |
2130 | pmap_t pm; | | 2130 | pmap_t pm; |
2131 | vaddr_t va; | | 2131 | vaddr_t va; |
2132 | u_int oflags; | | 2132 | u_int oflags; |
2133 | #ifdef PMAP_CACHE_VIPT | | 2133 | #ifdef PMAP_CACHE_VIPT |
2134 | const bool want_syncicache = PV_IS_EXEC_P(md->pvh_attrs); | | 2134 | const bool want_syncicache = PV_IS_EXEC_P(md->pvh_attrs); |
2135 | bool need_syncicache = false; | | 2135 | bool need_syncicache = false; |
2136 | bool did_syncicache = false; | | 2136 | bool did_syncicache = false; |
2137 | bool need_vac_me_harder = false; | | 2137 | bool need_vac_me_harder = false; |
2138 | #endif | | 2138 | #endif |
2139 | | | 2139 | |
2140 | NPDEBUG(PDB_BITS, | | 2140 | NPDEBUG(PDB_BITS, |
2141 | printf("pmap_clearbit: md %p mask 0x%x\n", | | 2141 | printf("pmap_clearbit: md %p mask 0x%x\n", |
2142 | md, maskbits)); | | 2142 | md, maskbits)); |
2143 | | | 2143 | |
2144 | PMAP_HEAD_TO_MAP_LOCK(); | | 2144 | PMAP_HEAD_TO_MAP_LOCK(); |
2145 | simple_lock(&md->pvh_slock); | | 2145 | simple_lock(&md->pvh_slock); |
2146 | | | 2146 | |
2147 | #ifdef PMAP_CACHE_VIPT | | 2147 | #ifdef PMAP_CACHE_VIPT |
2148 | /* | | 2148 | /* |
2149 | * If we might want to sync the I-cache and we've modified it, | | 2149 | * If we might want to sync the I-cache and we've modified it, |
2150 | * then we know we definitely need to sync or discard it. | | 2150 | * then we know we definitely need to sync or discard it. |
2151 | */ | | 2151 | */ |
2152 | if (want_syncicache) | | 2152 | if (want_syncicache) |
2153 | need_syncicache = md->pvh_attrs & PVF_MOD; | | 2153 | need_syncicache = md->pvh_attrs & PVF_MOD; |
2154 | #endif | | 2154 | #endif |
2155 | /* | | 2155 | /* |
2156 | * Clear saved attributes (modify, reference) | | 2156 | * Clear saved attributes (modify, reference) |
2157 | */ | | 2157 | */ |
2158 | md->pvh_attrs &= ~(maskbits & (PVF_MOD | PVF_REF)); | | 2158 | md->pvh_attrs &= ~(maskbits & (PVF_MOD | PVF_REF)); |
2159 | | | 2159 | |
2160 | if (SLIST_EMPTY(&md->pvh_list)) { | | 2160 | if (SLIST_EMPTY(&md->pvh_list)) { |
2161 | #ifdef PMAP_CACHE_VIPT | | 2161 | #ifdef PMAP_CACHE_VIPT |
2162 | if (need_syncicache) { | | 2162 | if (need_syncicache) { |
2163 | /* | | 2163 | /* |
2164 | * No one has it mapped, so just discard it. The next | | 2164 | * No one has it mapped, so just discard it. The next |
2165 | * exec remapping will cause it to be synced. | | 2165 | * exec remapping will cause it to be synced. |
2166 | */ | | 2166 | */ |
2167 | md->pvh_attrs &= ~PVF_EXEC; | | 2167 | md->pvh_attrs &= ~PVF_EXEC; |
2168 | PMAPCOUNT(exec_discarded_clearbit); | | 2168 | PMAPCOUNT(exec_discarded_clearbit); |
2169 | } | | 2169 | } |
2170 | #endif | | 2170 | #endif |
2171 | simple_unlock(&md->pvh_slock); | | 2171 | simple_unlock(&md->pvh_slock); |
2172 | PMAP_HEAD_TO_MAP_UNLOCK(); | | 2172 | PMAP_HEAD_TO_MAP_UNLOCK(); |
2173 | return; | | 2173 | return; |
2174 | } | | 2174 | } |
2175 | | | 2175 | |
2176 | /* | | 2176 | /* |
2177 | * Loop over all current mappings setting/clearing as appropos | | 2177 | * Loop over all current mappings setting/clearing as appropos |
2178 | */ | | 2178 | */ |
2179 | SLIST_FOREACH(pv, &md->pvh_list, pv_link) { | | 2179 | SLIST_FOREACH(pv, &md->pvh_list, pv_link) { |
2180 | va = pv->pv_va; | | 2180 | va = pv->pv_va; |
2181 | pm = pv->pv_pmap; | | 2181 | pm = pv->pv_pmap; |
2182 | oflags = pv->pv_flags; | | 2182 | oflags = pv->pv_flags; |
2183 | /* | | 2183 | /* |
2184 | * Kernel entries are unmanaged and as such not to be changed. | | 2184 | * Kernel entries are unmanaged and as such not to be changed. |
2185 | */ | | 2185 | */ |
2186 | if (oflags & PVF_KENTRY) | | 2186 | if (oflags & PVF_KENTRY) |
2187 | continue; | | 2187 | continue; |
2188 | pv->pv_flags &= ~maskbits; | | 2188 | pv->pv_flags &= ~maskbits; |
2189 | | | 2189 | |
2190 | pmap_acquire_pmap_lock(pm); | | 2190 | pmap_acquire_pmap_lock(pm); |
2191 | | | 2191 | |
2192 | l2b = pmap_get_l2_bucket(pm, va); | | 2192 | l2b = pmap_get_l2_bucket(pm, va); |
2193 | KDASSERT(l2b != NULL); | | 2193 | KDASSERT(l2b != NULL); |
2194 | | | 2194 | |
2195 | ptep = &l2b->l2b_kva[l2pte_index(va)]; | | 2195 | ptep = &l2b->l2b_kva[l2pte_index(va)]; |
2196 | npte = opte = *ptep; | | 2196 | npte = opte = *ptep; |
2197 | | | 2197 | |
2198 | NPDEBUG(PDB_BITS, | | 2198 | NPDEBUG(PDB_BITS, |
2199 | printf( | | 2199 | printf( |
2200 | "pmap_clearbit: pv %p, pm %p, va 0x%08lx, flag 0x%x\n", | | 2200 | "pmap_clearbit: pv %p, pm %p, va 0x%08lx, flag 0x%x\n", |
2201 | pv, pv->pv_pmap, pv->pv_va, oflags)); | | 2201 | pv, pv->pv_pmap, pv->pv_va, oflags)); |
2202 | | | 2202 | |
2203 | if (maskbits & (PVF_WRITE|PVF_MOD)) { | | 2203 | if (maskbits & (PVF_WRITE|PVF_MOD)) { |
2204 | #ifdef PMAP_CACHE_VIVT | | 2204 | #ifdef PMAP_CACHE_VIVT |
2205 | if ((pv->pv_flags & PVF_NC)) { | | 2205 | if ((pv->pv_flags & PVF_NC)) { |
2206 | /* | | 2206 | /* |
2207 | * Entry is not cacheable: | | 2207 | * Entry is not cacheable: |
2208 | * | | 2208 | * |
2209 | * Don't turn caching on again if this is a | | 2209 | * Don't turn caching on again if this is a |
2210 | * modified emulation. This would be | | 2210 | * modified emulation. This would be |
2211 | * inconsitent with the settings created by | | 2211 | * inconsitent with the settings created by |
2212 | * pmap_vac_me_harder(). Otherwise, it's safe | | 2212 | * pmap_vac_me_harder(). Otherwise, it's safe |
2213 | * to re-enable cacheing. | | 2213 | * to re-enable cacheing. |
2214 | * | | 2214 | * |
2215 | * There's no need to call pmap_vac_me_harder() | | 2215 | * There's no need to call pmap_vac_me_harder() |
2216 | * here: all pages are losing their write | | 2216 | * here: all pages are losing their write |
2217 | * permission. | | 2217 | * permission. |
2218 | */ | | 2218 | */ |
2219 | if (maskbits & PVF_WRITE) { | | 2219 | if (maskbits & PVF_WRITE) { |
2220 | npte |= pte_l2_s_cache_mode; | | 2220 | npte |= pte_l2_s_cache_mode; |
2221 | pv->pv_flags &= ~PVF_NC; | | 2221 | pv->pv_flags &= ~PVF_NC; |
2222 | } | | 2222 | } |
2223 | } else | | 2223 | } else |
2224 | if (l2pte_writable_p(opte)) { | | 2224 | if (l2pte_writable_p(opte)) { |
2225 | /* | | 2225 | /* |
2226 | * Entry is writable/cacheable: check if pmap | | 2226 | * Entry is writable/cacheable: check if pmap |
2227 | * is current if it is flush it, otherwise it | | 2227 | * is current if it is flush it, otherwise it |
2228 | * won't be in the cache | | 2228 | * won't be in the cache |
2229 | */ | | 2229 | */ |
2230 | if (PV_BEEN_EXECD(oflags)) | | 2230 | if (PV_BEEN_EXECD(oflags)) |
2231 | pmap_idcache_wbinv_range(pm, pv->pv_va, | | 2231 | pmap_idcache_wbinv_range(pm, pv->pv_va, |
2232 | PAGE_SIZE); | | 2232 | PAGE_SIZE); |
2233 | else | | 2233 | else |
2234 | if (PV_BEEN_REFD(oflags)) | | 2234 | if (PV_BEEN_REFD(oflags)) |
2235 | pmap_dcache_wb_range(pm, pv->pv_va, | | 2235 | pmap_dcache_wb_range(pm, pv->pv_va, |
2236 | PAGE_SIZE, | | 2236 | PAGE_SIZE, |
2237 | (maskbits & PVF_REF) != 0, false); | | 2237 | (maskbits & PVF_REF) != 0, false); |
2238 | } | | 2238 | } |
2239 | #endif | | 2239 | #endif |
2240 | | | 2240 | |
2241 | /* make the pte read only */ | | 2241 | /* make the pte read only */ |
2242 | npte = l2pte_set_readonly(npte); | | 2242 | npte = l2pte_set_readonly(npte); |
2243 | | | 2243 | |
2244 | if (maskbits & oflags & PVF_WRITE) { | | 2244 | if (maskbits & oflags & PVF_WRITE) { |
2245 | /* | | 2245 | /* |
2246 | * Keep alias accounting up to date | | 2246 | * Keep alias accounting up to date |
2247 | */ | | 2247 | */ |
2248 | if (pv->pv_pmap == pmap_kernel()) { | | 2248 | if (pv->pv_pmap == pmap_kernel()) { |
2249 | md->krw_mappings--; | | 2249 | md->krw_mappings--; |
2250 | md->kro_mappings++; | | 2250 | md->kro_mappings++; |
2251 | } else { | | 2251 | } else { |
2252 | md->urw_mappings--; | | 2252 | md->urw_mappings--; |
2253 | md->uro_mappings++; | | 2253 | md->uro_mappings++; |
2254 | } | | 2254 | } |
2255 | #ifdef PMAP_CACHE_VIPT | | 2255 | #ifdef PMAP_CACHE_VIPT |
2256 | if (md->urw_mappings + md->krw_mappings == 0) | | 2256 | if (md->urw_mappings + md->krw_mappings == 0) |
2257 | md->pvh_attrs &= ~PVF_WRITE; | | 2257 | md->pvh_attrs &= ~PVF_WRITE; |
2258 | if (want_syncicache) | | 2258 | if (want_syncicache) |
2259 | need_syncicache = true; | | 2259 | need_syncicache = true; |
2260 | need_vac_me_harder = true; | | 2260 | need_vac_me_harder = true; |
2261 | #endif | | 2261 | #endif |
2262 | } | | 2262 | } |
2263 | } | | 2263 | } |
2264 | | | 2264 | |
2265 | if (maskbits & PVF_REF) { | | 2265 | if (maskbits & PVF_REF) { |
2266 | if ((pv->pv_flags & PVF_NC) == 0 && | | 2266 | if ((pv->pv_flags & PVF_NC) == 0 && |
2267 | (maskbits & (PVF_WRITE|PVF_MOD)) == 0 && | | 2267 | (maskbits & (PVF_WRITE|PVF_MOD)) == 0 && |
2268 | l2pte_valid(npte)) { | | 2268 | l2pte_valid(npte)) { |
2269 | #ifdef PMAP_CACHE_VIVT | | 2269 | #ifdef PMAP_CACHE_VIVT |
2270 | /* | | 2270 | /* |
2271 | * Check npte here; we may have already | | 2271 | * Check npte here; we may have already |
2272 | * done the wbinv above, and the validity | | 2272 | * done the wbinv above, and the validity |
2273 | * of the PTE is the same for opte and | | 2273 | * of the PTE is the same for opte and |
2274 | * npte. | | 2274 | * npte. |
2275 | */ | | 2275 | */ |
2276 | /* XXXJRT need idcache_inv_range */ | | 2276 | /* XXXJRT need idcache_inv_range */ |
2277 | if (PV_BEEN_EXECD(oflags)) | | 2277 | if (PV_BEEN_EXECD(oflags)) |
2278 | pmap_idcache_wbinv_range(pm, | | 2278 | pmap_idcache_wbinv_range(pm, |
2279 | pv->pv_va, PAGE_SIZE); | | 2279 | pv->pv_va, PAGE_SIZE); |
2280 | else | | 2280 | else |
2281 | if (PV_BEEN_REFD(oflags)) | | 2281 | if (PV_BEEN_REFD(oflags)) |
2282 | pmap_dcache_wb_range(pm, | | 2282 | pmap_dcache_wb_range(pm, |
2283 | pv->pv_va, PAGE_SIZE, | | 2283 | pv->pv_va, PAGE_SIZE, |
2284 | true, true); | | 2284 | true, true); |
2285 | #endif | | 2285 | #endif |
2286 | } | | 2286 | } |
2287 | | | 2287 | |
2288 | /* | | 2288 | /* |
2289 | * Make the PTE invalid so that we will take a | | 2289 | * Make the PTE invalid so that we will take a |
2290 | * page fault the next time the mapping is | | 2290 | * page fault the next time the mapping is |
2291 | * referenced. | | 2291 | * referenced. |
2292 | */ | | 2292 | */ |
2293 | npte &= ~L2_TYPE_MASK; | | 2293 | npte &= ~L2_TYPE_MASK; |
2294 | npte |= L2_TYPE_INV; | | 2294 | npte |= L2_TYPE_INV; |
2295 | } | | 2295 | } |
2296 | | | 2296 | |
2297 | if (npte != opte) { | | 2297 | if (npte != opte) { |
2298 | *ptep = npte; | | 2298 | *ptep = npte; |
2299 | PTE_SYNC(ptep); | | 2299 | PTE_SYNC(ptep); |
2300 | /* Flush the TLB entry if a current pmap. */ | | 2300 | /* Flush the TLB entry if a current pmap. */ |
2301 | if (PV_BEEN_EXECD(oflags)) | | 2301 | if (PV_BEEN_EXECD(oflags)) |
2302 | pmap_tlb_flushID_SE(pm, pv->pv_va); | | 2302 | pmap_tlb_flushID_SE(pm, pv->pv_va); |
2303 | else | | 2303 | else |
2304 | if (PV_BEEN_REFD(oflags)) | | 2304 | if (PV_BEEN_REFD(oflags)) |
2305 | pmap_tlb_flushD_SE(pm, pv->pv_va); | | 2305 | pmap_tlb_flushD_SE(pm, pv->pv_va); |
2306 | } | | 2306 | } |
2307 | | | 2307 | |
2308 | pmap_release_pmap_lock(pm); | | 2308 | pmap_release_pmap_lock(pm); |
2309 | | | 2309 | |
2310 | NPDEBUG(PDB_BITS, | | 2310 | NPDEBUG(PDB_BITS, |
2311 | printf("pmap_clearbit: pm %p va 0x%lx opte 0x%08x npte 0x%08x\n", | | 2311 | printf("pmap_clearbit: pm %p va 0x%lx opte 0x%08x npte 0x%08x\n", |
2312 | pm, va, opte, npte)); | | 2312 | pm, va, opte, npte)); |
2313 | } | | 2313 | } |
2314 | | | 2314 | |
2315 | #ifdef PMAP_CACHE_VIPT | | 2315 | #ifdef PMAP_CACHE_VIPT |
2316 | /* | | 2316 | /* |
2317 | * If we need to sync the I-cache and we haven't done it yet, do it. | | 2317 | * If we need to sync the I-cache and we haven't done it yet, do it. |
2318 | */ | | 2318 | */ |
2319 | if (need_syncicache && !did_syncicache) { | | 2319 | if (need_syncicache && !did_syncicache) { |
2320 | pmap_syncicache_page(md, pa); | | 2320 | pmap_syncicache_page(md, pa); |
2321 | PMAPCOUNT(exec_synced_clearbit); | | 2321 | PMAPCOUNT(exec_synced_clearbit); |
2322 | } | | 2322 | } |
2323 | /* | | 2323 | /* |
2324 | * If we are changing this to read-only, we need to call vac_me_harder | | 2324 | * If we are changing this to read-only, we need to call vac_me_harder |
2325 | * so we can change all the read-only pages to cacheable. We pretend | | 2325 | * so we can change all the read-only pages to cacheable. We pretend |
2326 | * this as a page deletion. | | 2326 | * this as a page deletion. |
2327 | */ | | 2327 | */ |
2328 | if (need_vac_me_harder) { | | 2328 | if (need_vac_me_harder) { |
2329 | if (md->pvh_attrs & PVF_NC) | | 2329 | if (md->pvh_attrs & PVF_NC) |
2330 | pmap_vac_me_harder(md, pa, NULL, 0); | | 2330 | pmap_vac_me_harder(md, pa, NULL, 0); |
2331 | } | | 2331 | } |
2332 | #endif | | 2332 | #endif |
2333 | | | 2333 | |
2334 | simple_unlock(&md->pvh_slock); | | 2334 | simple_unlock(&md->pvh_slock); |
2335 | PMAP_HEAD_TO_MAP_UNLOCK(); | | 2335 | PMAP_HEAD_TO_MAP_UNLOCK(); |
2336 | } | | 2336 | } |
2337 | | | 2337 | |
2338 | /* | | 2338 | /* |
2339 | * pmap_clean_page() | | 2339 | * pmap_clean_page() |
2340 | * | | 2340 | * |
2341 | * This is a local function used to work out the best strategy to clean | | 2341 | * This is a local function used to work out the best strategy to clean |
2342 | * a single page referenced by its entry in the PV table. It's used by | | 2342 | * a single page referenced by its entry in the PV table. It's used by |
2343 | * pmap_copy_page, pmap_zero page and maybe some others later on. | | 2343 | * pmap_copy_page, pmap_zero page and maybe some others later on. |
2344 | * | | 2344 | * |
2345 | * Its policy is effectively: | | 2345 | * Its policy is effectively: |
2346 | * o If there are no mappings, we don't bother doing anything with the cache. | | 2346 | * o If there are no mappings, we don't bother doing anything with the cache. |
2347 | * o If there is one mapping, we clean just that page. | | 2347 | * o If there is one mapping, we clean just that page. |
2348 | * o If there are multiple mappings, we clean the entire cache. | | 2348 | * o If there are multiple mappings, we clean the entire cache. |
2349 | * | | 2349 | * |
2350 | * So that some functions can be further optimised, it returns 0 if it didn't | | 2350 | * So that some functions can be further optimised, it returns 0 if it didn't |
2351 | * clean the entire cache, or 1 if it did. | | 2351 | * clean the entire cache, or 1 if it did. |
2352 | * | | 2352 | * |
2353 | * XXX One bug in this routine is that if the pv_entry has a single page | | 2353 | * XXX One bug in this routine is that if the pv_entry has a single page |
2354 | * mapped at 0x00000000 a whole cache clean will be performed rather than | | 2354 | * mapped at 0x00000000 a whole cache clean will be performed rather than |
2355 | * just the 1 page. Since this should not occur in everyday use and if it does | | 2355 | * just the 1 page. Since this should not occur in everyday use and if it does |
2356 | * it will just result in not the most efficient clean for the page. | | 2356 | * it will just result in not the most efficient clean for the page. |
2357 | */ | | 2357 | */ |
2358 | #ifdef PMAP_CACHE_VIVT | | 2358 | #ifdef PMAP_CACHE_VIVT |
2359 | static int | | 2359 | static int |
2360 | pmap_clean_page(struct pv_entry *pv, bool is_src) | | 2360 | pmap_clean_page(struct pv_entry *pv, bool is_src) |
2361 | { | | 2361 | { |
2362 | pmap_t pm_to_clean = NULL; | | 2362 | pmap_t pm_to_clean = NULL; |
2363 | struct pv_entry *npv; | | 2363 | struct pv_entry *npv; |
2364 | u_int cache_needs_cleaning = 0; | | 2364 | u_int cache_needs_cleaning = 0; |
2365 | u_int flags = 0; | | 2365 | u_int flags = 0; |
2366 | vaddr_t page_to_clean = 0; | | 2366 | vaddr_t page_to_clean = 0; |
2367 | | | 2367 | |
2368 | if (pv == NULL) { | | 2368 | if (pv == NULL) { |
2369 | /* nothing mapped in so nothing to flush */ | | 2369 | /* nothing mapped in so nothing to flush */ |
2370 | return (0); | | 2370 | return (0); |
2371 | } | | 2371 | } |
2372 | | | 2372 | |
2373 | /* | | 2373 | /* |
2374 | * Since we flush the cache each time we change to a different | | 2374 | * Since we flush the cache each time we change to a different |
2375 | * user vmspace, we only need to flush the page if it is in the | | 2375 | * user vmspace, we only need to flush the page if it is in the |
2376 | * current pmap. | | 2376 | * current pmap. |
2377 | */ | | 2377 | */ |
2378 | | | 2378 | |
2379 | for (npv = pv; npv; npv = SLIST_NEXT(npv, pv_link)) { | | 2379 | for (npv = pv; npv; npv = SLIST_NEXT(npv, pv_link)) { |
2380 | if (pmap_is_current(npv->pv_pmap)) { | | 2380 | if (pmap_is_current(npv->pv_pmap)) { |
2381 | flags |= npv->pv_flags; | | 2381 | flags |= npv->pv_flags; |
2382 | /* | | 2382 | /* |
2383 | * The page is mapped non-cacheable in | | 2383 | * The page is mapped non-cacheable in |
2384 | * this map. No need to flush the cache. | | 2384 | * this map. No need to flush the cache. |
2385 | */ | | 2385 | */ |
2386 | if (npv->pv_flags & PVF_NC) { | | 2386 | if (npv->pv_flags & PVF_NC) { |
2387 | #ifdef DIAGNOSTIC | | 2387 | #ifdef DIAGNOSTIC |
2388 | if (cache_needs_cleaning) | | 2388 | if (cache_needs_cleaning) |
2389 | panic("pmap_clean_page: " | | 2389 | panic("pmap_clean_page: " |
2390 | "cache inconsistency"); | | 2390 | "cache inconsistency"); |
2391 | #endif | | 2391 | #endif |
2392 | break; | | 2392 | break; |
2393 | } else if (is_src && (npv->pv_flags & PVF_WRITE) == 0) | | 2393 | } else if (is_src && (npv->pv_flags & PVF_WRITE) == 0) |
2394 | continue; | | 2394 | continue; |
2395 | if (cache_needs_cleaning) { | | 2395 | if (cache_needs_cleaning) { |
2396 | page_to_clean = 0; | | 2396 | page_to_clean = 0; |
2397 | break; | | 2397 | break; |
2398 | } else { | | 2398 | } else { |
2399 | page_to_clean = npv->pv_va; | | 2399 | page_to_clean = npv->pv_va; |
2400 | pm_to_clean = npv->pv_pmap; | | 2400 | pm_to_clean = npv->pv_pmap; |
2401 | } | | 2401 | } |
2402 | cache_needs_cleaning = 1; | | 2402 | cache_needs_cleaning = 1; |
2403 | } | | 2403 | } |
2404 | } | | 2404 | } |
2405 | | | 2405 | |
2406 | if (page_to_clean) { | | 2406 | if (page_to_clean) { |
2407 | if (PV_BEEN_EXECD(flags)) | | 2407 | if (PV_BEEN_EXECD(flags)) |
2408 | pmap_idcache_wbinv_range(pm_to_clean, page_to_clean, | | 2408 | pmap_idcache_wbinv_range(pm_to_clean, page_to_clean, |
2409 | PAGE_SIZE); | | 2409 | PAGE_SIZE); |
2410 | else | | 2410 | else |
2411 | pmap_dcache_wb_range(pm_to_clean, page_to_clean, | | 2411 | pmap_dcache_wb_range(pm_to_clean, page_to_clean, |
2412 | PAGE_SIZE, !is_src, (flags & PVF_WRITE) == 0); | | 2412 | PAGE_SIZE, !is_src, (flags & PVF_WRITE) == 0); |
2413 | } else if (cache_needs_cleaning) { | | 2413 | } else if (cache_needs_cleaning) { |
2414 | pmap_t const pm = curproc->p_vmspace->vm_map.pmap; | | 2414 | pmap_t const pm = curproc->p_vmspace->vm_map.pmap; |
2415 | | | 2415 | |
2416 | if (PV_BEEN_EXECD(flags)) | | 2416 | if (PV_BEEN_EXECD(flags)) |
2417 | pmap_idcache_wbinv_all(pm); | | 2417 | pmap_idcache_wbinv_all(pm); |
2418 | else | | 2418 | else |
2419 | pmap_dcache_wbinv_all(pm); | | 2419 | pmap_dcache_wbinv_all(pm); |
2420 | return (1); | | 2420 | return (1); |
2421 | } | | 2421 | } |
2422 | return (0); | | 2422 | return (0); |
2423 | } | | 2423 | } |
2424 | #endif | | 2424 | #endif |
2425 | | | 2425 | |
2426 | #ifdef PMAP_CACHE_VIPT | | 2426 | #ifdef PMAP_CACHE_VIPT |
2427 | /* | | 2427 | /* |
2428 | * Sync a page with the I-cache. Since this is a VIPT, we must pick the | | 2428 | * Sync a page with the I-cache. Since this is a VIPT, we must pick the |
2429 | * right cache alias to make sure we flush the right stuff. | | 2429 | * right cache alias to make sure we flush the right stuff. |
2430 | */ | | 2430 | */ |
2431 | void | | 2431 | void |
2432 | pmap_syncicache_page(struct vm_page_md *md, paddr_t pa) | | 2432 | pmap_syncicache_page(struct vm_page_md *md, paddr_t pa) |
2433 | { | | 2433 | { |
2434 | const vsize_t va_offset = md->pvh_attrs & arm_cache_prefer_mask; | | 2434 | const vsize_t va_offset = md->pvh_attrs & arm_cache_prefer_mask; |
2435 | pt_entry_t * const ptep = &cdst_pte[va_offset >> PGSHIFT]; | | 2435 | pt_entry_t * const ptep = &cdst_pte[va_offset >> PGSHIFT]; |
2436 | | | 2436 | |
2437 | NPDEBUG(PDB_EXEC, printf("pmap_syncicache_page: md=%p (attrs=%#x)\n", | | 2437 | NPDEBUG(PDB_EXEC, printf("pmap_syncicache_page: md=%p (attrs=%#x)\n", |
2438 | md, md->pvh_attrs)); | | 2438 | md, md->pvh_attrs)); |
2439 | /* | | 2439 | /* |
2440 | * No need to clean the page if it's non-cached. | | 2440 | * No need to clean the page if it's non-cached. |
2441 | */ | | 2441 | */ |
2442 | if (md->pvh_attrs & PVF_NC) | | 2442 | if (md->pvh_attrs & PVF_NC) |
2443 | return; | | 2443 | return; |
2444 | KASSERT(arm_cache_prefer_mask == 0 || md->pvh_attrs & PVF_COLORED); | | 2444 | KASSERT(arm_cache_prefer_mask == 0 || md->pvh_attrs & PVF_COLORED); |
2445 | | | 2445 | |
2446 | pmap_tlb_flushID_SE(pmap_kernel(), cdstp + va_offset); | | 2446 | pmap_tlb_flushID_SE(pmap_kernel(), cdstp + va_offset); |
2447 | /* | | 2447 | /* |
2448 | * Set up a PTE with the right coloring to flush existing cache lines. | | 2448 | * Set up a PTE with the right coloring to flush existing cache lines. |
2449 | */ | | 2449 | */ |
2450 | *ptep = L2_S_PROTO | | | 2450 | *ptep = L2_S_PROTO | |
2451 | pa | | 2451 | pa |
2452 | | L2_S_PROT(PTE_KERNEL, VM_PROT_READ|VM_PROT_WRITE) | | 2452 | | L2_S_PROT(PTE_KERNEL, VM_PROT_READ|VM_PROT_WRITE) |
2453 | | pte_l2_s_cache_mode; | | 2453 | | pte_l2_s_cache_mode; |
2454 | PTE_SYNC(ptep); | | 2454 | PTE_SYNC(ptep); |
2455 | | | 2455 | |
2456 | /* | | 2456 | /* |
2457 | * Flush it. | | 2457 | * Flush it. |
2458 | */ | | 2458 | */ |
2459 | cpu_icache_sync_range(cdstp + va_offset, PAGE_SIZE); | | 2459 | cpu_icache_sync_range(cdstp + va_offset, PAGE_SIZE); |
2460 | /* | | 2460 | /* |
2461 | * Unmap the page. | | 2461 | * Unmap the page. |
2462 | */ | | 2462 | */ |
2463 | *ptep = 0; | | 2463 | *ptep = 0; |
2464 | PTE_SYNC(ptep); | | 2464 | PTE_SYNC(ptep); |
2465 | pmap_tlb_flushID_SE(pmap_kernel(), cdstp + va_offset); | | 2465 | pmap_tlb_flushID_SE(pmap_kernel(), cdstp + va_offset); |
2466 | | | 2466 | |
2467 | md->pvh_attrs |= PVF_EXEC; | | 2467 | md->pvh_attrs |= PVF_EXEC; |
2468 | PMAPCOUNT(exec_synced); | | 2468 | PMAPCOUNT(exec_synced); |
2469 | } | | 2469 | } |
2470 | | | 2470 | |
2471 | void | | 2471 | void |
2472 | pmap_flush_page(struct vm_page_md *md, paddr_t pa, enum pmap_flush_op flush) | | 2472 | pmap_flush_page(struct vm_page_md *md, paddr_t pa, enum pmap_flush_op flush) |
2473 | { | | 2473 | { |
2474 | vsize_t va_offset, end_va; | | 2474 | vsize_t va_offset, end_va; |
2475 | void (*cf)(vaddr_t, vsize_t); | | 2475 | void (*cf)(vaddr_t, vsize_t); |
2476 | | | 2476 | |
2477 | if (arm_cache_prefer_mask == 0) | | 2477 | if (arm_cache_prefer_mask == 0) |
2478 | return; | | 2478 | return; |
2479 | | | 2479 | |
2480 | switch (flush) { | | 2480 | switch (flush) { |
2481 | case PMAP_FLUSH_PRIMARY: | | 2481 | case PMAP_FLUSH_PRIMARY: |
2482 | if (md->pvh_attrs & PVF_MULTCLR) { | | 2482 | if (md->pvh_attrs & PVF_MULTCLR) { |
2483 | va_offset = 0; | | 2483 | va_offset = 0; |
2484 | end_va = arm_cache_prefer_mask; | | 2484 | end_va = arm_cache_prefer_mask; |
2485 | md->pvh_attrs &= ~PVF_MULTCLR; | | 2485 | md->pvh_attrs &= ~PVF_MULTCLR; |
2486 | PMAPCOUNT(vac_flush_lots); | | 2486 | PMAPCOUNT(vac_flush_lots); |
2487 | } else { | | 2487 | } else { |
2488 | va_offset = md->pvh_attrs & arm_cache_prefer_mask; | | 2488 | va_offset = md->pvh_attrs & arm_cache_prefer_mask; |
2489 | end_va = va_offset; | | 2489 | end_va = va_offset; |
2490 | PMAPCOUNT(vac_flush_one); | | 2490 | PMAPCOUNT(vac_flush_one); |
2491 | } | | 2491 | } |
2492 | /* | | 2492 | /* |
2493 | * Mark that the page is no longer dirty. | | 2493 | * Mark that the page is no longer dirty. |
2494 | */ | | 2494 | */ |
2495 | md->pvh_attrs &= ~PVF_DIRTY; | | 2495 | md->pvh_attrs &= ~PVF_DIRTY; |
2496 | cf = cpufuncs.cf_idcache_wbinv_range; | | 2496 | cf = cpufuncs.cf_idcache_wbinv_range; |
2497 | break; | | 2497 | break; |
2498 | case PMAP_FLUSH_SECONDARY: | | 2498 | case PMAP_FLUSH_SECONDARY: |
2499 | va_offset = 0; | | 2499 | va_offset = 0; |
2500 | end_va = arm_cache_prefer_mask; | | 2500 | end_va = arm_cache_prefer_mask; |
2501 | cf = cpufuncs.cf_idcache_wbinv_range; | | 2501 | cf = cpufuncs.cf_idcache_wbinv_range; |
2502 | md->pvh_attrs &= ~PVF_MULTCLR; | | 2502 | md->pvh_attrs &= ~PVF_MULTCLR; |
2503 | PMAPCOUNT(vac_flush_lots); | | 2503 | PMAPCOUNT(vac_flush_lots); |
2504 | break; | | 2504 | break; |
2505 | case PMAP_CLEAN_PRIMARY: | | 2505 | case PMAP_CLEAN_PRIMARY: |
2506 | va_offset = md->pvh_attrs & arm_cache_prefer_mask; | | 2506 | va_offset = md->pvh_attrs & arm_cache_prefer_mask; |
2507 | end_va = va_offset; | | 2507 | end_va = va_offset; |
2508 | cf = cpufuncs.cf_dcache_wb_range; | | 2508 | cf = cpufuncs.cf_dcache_wb_range; |
2509 | /* | | 2509 | /* |
2510 | * Mark that the page is no longer dirty. | | 2510 | * Mark that the page is no longer dirty. |
2511 | */ | | 2511 | */ |
2512 | if ((md->pvh_attrs & PVF_DMOD) == 0) | | 2512 | if ((md->pvh_attrs & PVF_DMOD) == 0) |
2513 | md->pvh_attrs &= ~PVF_DIRTY; | | 2513 | md->pvh_attrs &= ~PVF_DIRTY; |
2514 | PMAPCOUNT(vac_clean_one); | | 2514 | PMAPCOUNT(vac_clean_one); |
2515 | break; | | 2515 | break; |
2516 | default: | | 2516 | default: |
2517 | return; | | 2517 | return; |
2518 | } | | 2518 | } |
2519 | | | 2519 | |
2520 | KASSERT(!(md->pvh_attrs & PVF_NC)); | | 2520 | KASSERT(!(md->pvh_attrs & PVF_NC)); |
2521 | | | 2521 | |
2522 | NPDEBUG(PDB_VAC, printf("pmap_flush_page: md=%p (attrs=%#x)\n", | | 2522 | NPDEBUG(PDB_VAC, printf("pmap_flush_page: md=%p (attrs=%#x)\n", |
2523 | md, md->pvh_attrs)); | | 2523 | md, md->pvh_attrs)); |
2524 | | | 2524 | |
2525 | for (; va_offset <= end_va; va_offset += PAGE_SIZE) { | | 2525 | for (; va_offset <= end_va; va_offset += PAGE_SIZE) { |
2526 | const size_t pte_offset = va_offset >> PGSHIFT; | | 2526 | const size_t pte_offset = va_offset >> PGSHIFT; |
2527 | pt_entry_t * const ptep = &cdst_pte[pte_offset]; | | 2527 | pt_entry_t * const ptep = &cdst_pte[pte_offset]; |
2528 | const pt_entry_t oldpte = *ptep; | | 2528 | const pt_entry_t oldpte = *ptep; |
2529 | | | 2529 | |
2530 | if (flush == PMAP_FLUSH_SECONDARY | | 2530 | if (flush == PMAP_FLUSH_SECONDARY |
2531 | && va_offset == (md->pvh_attrs & arm_cache_prefer_mask)) | | 2531 | && va_offset == (md->pvh_attrs & arm_cache_prefer_mask)) |
2532 | continue; | | 2532 | continue; |
2533 | | | 2533 | |
2534 | pmap_tlb_flushID_SE(pmap_kernel(), cdstp + va_offset); | | 2534 | pmap_tlb_flushID_SE(pmap_kernel(), cdstp + va_offset); |
2535 | /* | | 2535 | /* |
2536 | * Set up a PTE with the right coloring to flush | | 2536 | * Set up a PTE with the right coloring to flush |
2537 | * existing cache entries. | | 2537 | * existing cache entries. |
2538 | */ | | 2538 | */ |
2539 | *ptep = L2_S_PROTO | | 2539 | *ptep = L2_S_PROTO |
2540 | | pa | | 2540 | | pa |
2541 | | L2_S_PROT(PTE_KERNEL, VM_PROT_READ|VM_PROT_WRITE) | | 2541 | | L2_S_PROT(PTE_KERNEL, VM_PROT_READ|VM_PROT_WRITE) |
2542 | | pte_l2_s_cache_mode; | | 2542 | | pte_l2_s_cache_mode; |
2543 | PTE_SYNC(ptep); | | 2543 | PTE_SYNC(ptep); |
2544 | | | 2544 | |
2545 | /* | | 2545 | /* |
2546 | * Flush it. | | 2546 | * Flush it. |
2547 | */ | | 2547 | */ |
2548 | (*cf)(cdstp + va_offset, PAGE_SIZE); | | 2548 | (*cf)(cdstp + va_offset, PAGE_SIZE); |
2549 | | | 2549 | |
2550 | /* | | 2550 | /* |
2551 | * Restore the page table entry since we might have interrupted | | 2551 | * Restore the page table entry since we might have interrupted |
2552 | * pmap_zero_page or pmap_copy_page which was already using | | 2552 | * pmap_zero_page or pmap_copy_page which was already using |
2553 | * this pte. | | 2553 | * this pte. |
2554 | */ | | 2554 | */ |
2555 | *ptep = oldpte; | | 2555 | *ptep = oldpte; |
2556 | PTE_SYNC(ptep); | | 2556 | PTE_SYNC(ptep); |
2557 | pmap_tlb_flushID_SE(pmap_kernel(), cdstp + va_offset); | | 2557 | pmap_tlb_flushID_SE(pmap_kernel(), cdstp + va_offset); |
2558 | } | | 2558 | } |
2559 | } | | 2559 | } |
2560 | #endif /* PMAP_CACHE_VIPT */ | | 2560 | #endif /* PMAP_CACHE_VIPT */ |
2561 | | | 2561 | |
2562 | /* | | 2562 | /* |
2563 | * Routine: pmap_page_remove | | 2563 | * Routine: pmap_page_remove |
2564 | * Function: | | 2564 | * Function: |
2565 | * Removes this physical page from | | 2565 | * Removes this physical page from |
2566 | * all physical maps in which it resides. | | 2566 | * all physical maps in which it resides. |
2567 | * Reflects back modify bits to the pager. | | 2567 | * Reflects back modify bits to the pager. |
2568 | */ | | 2568 | */ |
2569 | static void | | 2569 | static void |
2570 | pmap_page_remove(struct vm_page_md *md, paddr_t pa) | | 2570 | pmap_page_remove(struct vm_page_md *md, paddr_t pa) |
2571 | { | | 2571 | { |
2572 | struct l2_bucket *l2b; | | 2572 | struct l2_bucket *l2b; |
2573 | struct pv_entry *pv, *npv, **pvp; | | 2573 | struct pv_entry *pv, *npv, **pvp; |
2574 | pmap_t pm; | | 2574 | pmap_t pm; |
2575 | pt_entry_t *ptep; | | 2575 | pt_entry_t *ptep; |
2576 | bool flush; | | 2576 | bool flush; |
2577 | u_int flags; | | 2577 | u_int flags; |
2578 | | | 2578 | |
2579 | NPDEBUG(PDB_FOLLOW, | | 2579 | NPDEBUG(PDB_FOLLOW, |
2580 | printf("pmap_page_remove: pg %p (0x%08lx)\n", pg, | | 2580 | printf("pmap_page_remove: md %p (0x%08lx)\n", md, |
2581 | pa)); | | 2581 | pa)); |
2582 | | | 2582 | |
2583 | PMAP_HEAD_TO_MAP_LOCK(); | | 2583 | PMAP_HEAD_TO_MAP_LOCK(); |
2584 | simple_lock(&md->pvh_slock); | | 2584 | simple_lock(&md->pvh_slock); |
2585 | | | 2585 | |
2586 | pv = SLIST_FIRST(&md->pvh_list); | | 2586 | pv = SLIST_FIRST(&md->pvh_list); |
2587 | if (pv == NULL) { | | 2587 | if (pv == NULL) { |
2588 | #ifdef PMAP_CACHE_VIPT | | 2588 | #ifdef PMAP_CACHE_VIPT |
2589 | /* | | 2589 | /* |
2590 | * We *know* the page contents are about to be replaced. | | 2590 | * We *know* the page contents are about to be replaced. |
2591 | * Discard the exec contents | | 2591 | * Discard the exec contents |
2592 | */ | | 2592 | */ |
2593 | if (PV_IS_EXEC_P(md->pvh_attrs)) | | 2593 | if (PV_IS_EXEC_P(md->pvh_attrs)) |
2594 | PMAPCOUNT(exec_discarded_page_protect); | | 2594 | PMAPCOUNT(exec_discarded_page_protect); |
2595 | md->pvh_attrs &= ~PVF_EXEC; | | 2595 | md->pvh_attrs &= ~PVF_EXEC; |
2596 | KASSERT((md->urw_mappings + md->krw_mappings == 0) == !(md->pvh_attrs & PVF_WRITE)); | | 2596 | KASSERT((md->urw_mappings + md->krw_mappings == 0) == !(md->pvh_attrs & PVF_WRITE)); |
2597 | #endif | | 2597 | #endif |
2598 | simple_unlock(&md->pvh_slock); | | 2598 | simple_unlock(&md->pvh_slock); |
2599 | PMAP_HEAD_TO_MAP_UNLOCK(); | | 2599 | PMAP_HEAD_TO_MAP_UNLOCK(); |
2600 | return; | | 2600 | return; |
2601 | } | | 2601 | } |
2602 | #ifdef PMAP_CACHE_VIPT | | 2602 | #ifdef PMAP_CACHE_VIPT |
2603 | KASSERT(arm_cache_prefer_mask == 0 || pmap_is_page_colored_p(md)); | | 2603 | KASSERT(arm_cache_prefer_mask == 0 || pmap_is_page_colored_p(md)); |
2604 | #endif | | 2604 | #endif |
2605 | | | 2605 | |
2606 | /* | | 2606 | /* |
2607 | * Clear alias counts | | 2607 | * Clear alias counts |
2608 | */ | | 2608 | */ |
2609 | #ifdef PMAP_CACHE_VIVT | | 2609 | #ifdef PMAP_CACHE_VIVT |
2610 | md->k_mappings = 0; | | 2610 | md->k_mappings = 0; |
2611 | #endif | | 2611 | #endif |
2612 | md->urw_mappings = md->uro_mappings = 0; | | 2612 | md->urw_mappings = md->uro_mappings = 0; |
2613 | | | 2613 | |
2614 | flush = false; | | 2614 | flush = false; |
2615 | flags = 0; | | 2615 | flags = 0; |
2616 | | | 2616 | |
2617 | #ifdef PMAP_CACHE_VIVT | | 2617 | #ifdef PMAP_CACHE_VIVT |
2618 | pmap_clean_page(pv, false); | | 2618 | pmap_clean_page(pv, false); |
2619 | #endif | | 2619 | #endif |
2620 | | | 2620 | |
2621 | pvp = &SLIST_FIRST(&md->pvh_list); | | 2621 | pvp = &SLIST_FIRST(&md->pvh_list); |
2622 | while (pv) { | | 2622 | while (pv) { |
2623 | pm = pv->pv_pmap; | | 2623 | pm = pv->pv_pmap; |
2624 | npv = SLIST_NEXT(pv, pv_link); | | 2624 | npv = SLIST_NEXT(pv, pv_link); |
2625 | if (flush == false && pmap_is_current(pm)) | | 2625 | if (flush == false && pmap_is_current(pm)) |
2626 | flush = true; | | 2626 | flush = true; |
2627 | | | 2627 | |
2628 | if (pm == pmap_kernel()) { | | 2628 | if (pm == pmap_kernel()) { |
2629 | #ifdef PMAP_CACHE_VIPT | | 2629 | #ifdef PMAP_CACHE_VIPT |
2630 | /* | | 2630 | /* |
2631 | * If this was unmanaged mapping, it must be preserved. | | 2631 | * If this was unmanaged mapping, it must be preserved. |
2632 | * Move it back on the list and advance the end-of-list | | 2632 | * Move it back on the list and advance the end-of-list |
2633 | * pointer. | | 2633 | * pointer. |
2634 | */ | | 2634 | */ |
2635 | if (pv->pv_flags & PVF_KENTRY) { | | 2635 | if (pv->pv_flags & PVF_KENTRY) { |
2636 | *pvp = pv; | | 2636 | *pvp = pv; |
2637 | pvp = &SLIST_NEXT(pv, pv_link); | | 2637 | pvp = &SLIST_NEXT(pv, pv_link); |
2638 | pv = npv; | | 2638 | pv = npv; |
2639 | continue; | | 2639 | continue; |
2640 | } | | 2640 | } |
2641 | if (pv->pv_flags & PVF_WRITE) | | 2641 | if (pv->pv_flags & PVF_WRITE) |
2642 | md->krw_mappings--; | | 2642 | md->krw_mappings--; |
2643 | else | | 2643 | else |
2644 | md->kro_mappings--; | | 2644 | md->kro_mappings--; |
2645 | #endif | | 2645 | #endif |
2646 | PMAPCOUNT(kernel_unmappings); | | 2646 | PMAPCOUNT(kernel_unmappings); |
2647 | } | | 2647 | } |
2648 | PMAPCOUNT(unmappings); | | 2648 | PMAPCOUNT(unmappings); |
2649 | | | 2649 | |
2650 | pmap_acquire_pmap_lock(pm); | | 2650 | pmap_acquire_pmap_lock(pm); |
2651 | | | 2651 | |
2652 | l2b = pmap_get_l2_bucket(pm, pv->pv_va); | | 2652 | l2b = pmap_get_l2_bucket(pm, pv->pv_va); |
2653 | KDASSERT(l2b != NULL); | | 2653 | KDASSERT(l2b != NULL); |
2654 | | | 2654 | |
2655 | ptep = &l2b->l2b_kva[l2pte_index(pv->pv_va)]; | | 2655 | ptep = &l2b->l2b_kva[l2pte_index(pv->pv_va)]; |
2656 | | | 2656 | |
2657 | /* | | 2657 | /* |
2658 | * Update statistics | | 2658 | * Update statistics |
2659 | */ | | 2659 | */ |
2660 | --pm->pm_stats.resident_count; | | 2660 | --pm->pm_stats.resident_count; |
2661 | | | 2661 | |
2662 | /* Wired bit */ | | 2662 | /* Wired bit */ |
2663 | if (pv->pv_flags & PVF_WIRED) | | 2663 | if (pv->pv_flags & PVF_WIRED) |
2664 | --pm->pm_stats.wired_count; | | 2664 | --pm->pm_stats.wired_count; |
2665 | | | 2665 | |
2666 | flags |= pv->pv_flags; | | 2666 | flags |= pv->pv_flags; |
2667 | | | 2667 | |
2668 | /* | | 2668 | /* |
2669 | * Invalidate the PTEs. | | 2669 | * Invalidate the PTEs. |
2670 | */ | | 2670 | */ |
2671 | *ptep = 0; | | 2671 | *ptep = 0; |
2672 | PTE_SYNC_CURRENT(pm, ptep); | | 2672 | PTE_SYNC_CURRENT(pm, ptep); |
2673 | pmap_free_l2_bucket(pm, l2b, 1); | | 2673 | pmap_free_l2_bucket(pm, l2b, 1); |
2674 | | | 2674 | |
2675 | pool_put(&pmap_pv_pool, pv); | | 2675 | pool_put(&pmap_pv_pool, pv); |
2676 | pv = npv; | | 2676 | pv = npv; |
2677 | /* | | 2677 | /* |
2678 | * if we reach the end of the list and there are still | | 2678 | * if we reach the end of the list and there are still |
2679 | * mappings, they might be able to be cached now. | | 2679 | * mappings, they might be able to be cached now. |
2680 | */ | | 2680 | */ |
2681 | if (pv == NULL) { | | 2681 | if (pv == NULL) { |
2682 | *pvp = NULL; | | 2682 | *pvp = NULL; |
2683 | if (!SLIST_EMPTY(&md->pvh_list)) | | 2683 | if (!SLIST_EMPTY(&md->pvh_list)) |
2684 | pmap_vac_me_harder(md, pa, pm, 0); | | 2684 | pmap_vac_me_harder(md, pa, pm, 0); |
2685 | } | | 2685 | } |
2686 | pmap_release_pmap_lock(pm); | | 2686 | pmap_release_pmap_lock(pm); |
2687 | } | | 2687 | } |
2688 | #ifdef PMAP_CACHE_VIPT | | 2688 | #ifdef PMAP_CACHE_VIPT |
2689 | /* | | 2689 | /* |
2690 | * Its EXEC cache is now gone. | | 2690 | * Its EXEC cache is now gone. |
2691 | */ | | 2691 | */ |
2692 | if (PV_IS_EXEC_P(md->pvh_attrs)) | | 2692 | if (PV_IS_EXEC_P(md->pvh_attrs)) |
2693 | PMAPCOUNT(exec_discarded_page_protect); | | 2693 | PMAPCOUNT(exec_discarded_page_protect); |
2694 | md->pvh_attrs &= ~PVF_EXEC; | | 2694 | md->pvh_attrs &= ~PVF_EXEC; |
2695 | KASSERT(md->urw_mappings == 0); | | 2695 | KASSERT(md->urw_mappings == 0); |
2696 | KASSERT(md->uro_mappings == 0); | | 2696 | KASSERT(md->uro_mappings == 0); |
2697 | if (md->krw_mappings == 0) | | 2697 | if (md->krw_mappings == 0) |
2698 | md->pvh_attrs &= ~PVF_WRITE; | | 2698 | md->pvh_attrs &= ~PVF_WRITE; |
2699 | KASSERT((md->urw_mappings + md->krw_mappings == 0) == !(md->pvh_attrs & PVF_WRITE)); | | 2699 | KASSERT((md->urw_mappings + md->krw_mappings == 0) == !(md->pvh_attrs & PVF_WRITE)); |
2700 | #endif | | 2700 | #endif |
2701 | simple_unlock(&md->pvh_slock); | | 2701 | simple_unlock(&md->pvh_slock); |
2702 | PMAP_HEAD_TO_MAP_UNLOCK(); | | 2702 | PMAP_HEAD_TO_MAP_UNLOCK(); |
2703 | | | 2703 | |
2704 | if (flush) { | | 2704 | if (flush) { |
2705 | /* | | 2705 | /* |
2706 | * Note: We can't use pmap_tlb_flush{I,D}() here since that | | 2706 | * Note: We can't use pmap_tlb_flush{I,D}() here since that |
2707 | * would need a subsequent call to pmap_update() to ensure | | 2707 | * would need a subsequent call to pmap_update() to ensure |
2708 | * curpm->pm_cstate.cs_all is reset. Our callers are not | | 2708 | * curpm->pm_cstate.cs_all is reset. Our callers are not |
2709 | * required to do that (see pmap(9)), so we can't modify | | 2709 | * required to do that (see pmap(9)), so we can't modify |
2710 | * the current pmap's state. | | 2710 | * the current pmap's state. |
2711 | */ | | 2711 | */ |
2712 | if (PV_BEEN_EXECD(flags)) | | 2712 | if (PV_BEEN_EXECD(flags)) |
2713 | cpu_tlb_flushID(); | | 2713 | cpu_tlb_flushID(); |
2714 | else | | 2714 | else |
2715 | cpu_tlb_flushD(); | | 2715 | cpu_tlb_flushD(); |
2716 | } | | 2716 | } |
2717 | cpu_cpwait(); | | 2717 | cpu_cpwait(); |
2718 | } | | 2718 | } |
2719 | | | 2719 | |
2720 | /* | | 2720 | /* |
2721 | * pmap_t pmap_create(void) | | 2721 | * pmap_t pmap_create(void) |
2722 | * | | 2722 | * |
2723 | * Create a new pmap structure from scratch. | | 2723 | * Create a new pmap structure from scratch. |
2724 | */ | | 2724 | */ |
2725 | pmap_t | | 2725 | pmap_t |
2726 | pmap_create(void) | | 2726 | pmap_create(void) |
2727 | { | | 2727 | { |
2728 | pmap_t pm; | | 2728 | pmap_t pm; |
2729 | | | 2729 | |
2730 | pm = pool_cache_get(&pmap_cache, PR_WAITOK); | | 2730 | pm = pool_cache_get(&pmap_cache, PR_WAITOK); |
2731 | | | 2731 | |
2732 | UVM_OBJ_INIT(&pm->pm_obj, NULL, 1); | | 2732 | UVM_OBJ_INIT(&pm->pm_obj, NULL, 1); |
2733 | pm->pm_stats.wired_count = 0; | | 2733 | pm->pm_stats.wired_count = 0; |
2734 | pm->pm_stats.resident_count = 1; | | 2734 | pm->pm_stats.resident_count = 1; |
2735 | pm->pm_cstate.cs_all = 0; | | 2735 | pm->pm_cstate.cs_all = 0; |
2736 | pmap_alloc_l1(pm); | | 2736 | pmap_alloc_l1(pm); |
2737 | | | 2737 | |
2738 | /* | | 2738 | /* |
2739 | * Note: The pool cache ensures that the pm_l2[] array is already | | 2739 | * Note: The pool cache ensures that the pm_l2[] array is already |
2740 | * initialised to zero. | | 2740 | * initialised to zero. |
2741 | */ | | 2741 | */ |
2742 | | | 2742 | |
2743 | pmap_pinit(pm); | | 2743 | pmap_pinit(pm); |
2744 | | | 2744 | |
2745 | LIST_INSERT_HEAD(&pmap_pmaps, pm, pm_list); | | 2745 | LIST_INSERT_HEAD(&pmap_pmaps, pm, pm_list); |
2746 | | | 2746 | |
2747 | return (pm); | | 2747 | return (pm); |
2748 | } | | 2748 | } |
2749 | | | 2749 | |
2750 | /* | | 2750 | /* |
2751 | * int pmap_enter(pmap_t pm, vaddr_t va, paddr_t pa, vm_prot_t prot, | | 2751 | * int pmap_enter(pmap_t pm, vaddr_t va, paddr_t pa, vm_prot_t prot, |
2752 | * u_int flags) | | 2752 | * u_int flags) |
2753 | * | | 2753 | * |
2754 | * Insert the given physical page (p) at | | 2754 | * Insert the given physical page (p) at |
2755 | * the specified virtual address (v) in the | | 2755 | * the specified virtual address (v) in the |
2756 | * target physical map with the protection requested. | | 2756 | * target physical map with the protection requested. |
2757 | * | | 2757 | * |
2758 | * NB: This is the only routine which MAY NOT lazy-evaluate | | 2758 | * NB: This is the only routine which MAY NOT lazy-evaluate |
2759 | * or lose information. That is, this routine must actually | | 2759 | * or lose information. That is, this routine must actually |
2760 | * insert this page into the given map NOW. | | 2760 | * insert this page into the given map NOW. |
2761 | */ | | 2761 | */ |
2762 | int | | 2762 | int |
2763 | pmap_enter(pmap_t pm, vaddr_t va, paddr_t pa, vm_prot_t prot, u_int flags) | | 2763 | pmap_enter(pmap_t pm, vaddr_t va, paddr_t pa, vm_prot_t prot, u_int flags) |
2764 | { | | 2764 | { |
2765 | struct l2_bucket *l2b; | | 2765 | struct l2_bucket *l2b; |
2766 | struct vm_page *pg, *opg; | | 2766 | struct vm_page *pg, *opg; |
2767 | struct pv_entry *pv; | | 2767 | struct pv_entry *pv; |
2768 | pt_entry_t *ptep, npte, opte; | | 2768 | pt_entry_t *ptep, npte, opte; |
2769 | u_int nflags; | | 2769 | u_int nflags; |
2770 | u_int oflags; | | 2770 | u_int oflags; |
2771 | | | 2771 | |
2772 | NPDEBUG(PDB_ENTER, printf("pmap_enter: pm %p va 0x%lx pa 0x%lx prot %x flag %x\n", pm, va, pa, prot, flags)); | | 2772 | NPDEBUG(PDB_ENTER, printf("pmap_enter: pm %p va 0x%lx pa 0x%lx prot %x flag %x\n", pm, va, pa, prot, flags)); |
2773 | | | 2773 | |
2774 | KDASSERT((flags & PMAP_WIRED) == 0 || (flags & VM_PROT_ALL) != 0); | | 2774 | KDASSERT((flags & PMAP_WIRED) == 0 || (flags & VM_PROT_ALL) != 0); |
2775 | KDASSERT(((va | pa) & PGOFSET) == 0); | | 2775 | KDASSERT(((va | pa) & PGOFSET) == 0); |
2776 | | | 2776 | |
2777 | /* | | 2777 | /* |
2778 | * Get a pointer to the page. Later on in this function, we | | 2778 | * Get a pointer to the page. Later on in this function, we |
2779 | * test for a managed page by checking pg != NULL. | | 2779 | * test for a managed page by checking pg != NULL. |
2780 | */ | | 2780 | */ |
2781 | pg = pmap_initialized ? PHYS_TO_VM_PAGE(pa) : NULL; | | 2781 | pg = pmap_initialized ? PHYS_TO_VM_PAGE(pa) : NULL; |
2782 | | | 2782 | |
2783 | nflags = 0; | | 2783 | nflags = 0; |
2784 | if (prot & VM_PROT_WRITE) | | 2784 | if (prot & VM_PROT_WRITE) |
2785 | nflags |= PVF_WRITE; | | 2785 | nflags |= PVF_WRITE; |
2786 | if (prot & VM_PROT_EXECUTE) | | 2786 | if (prot & VM_PROT_EXECUTE) |
2787 | nflags |= PVF_EXEC; | | 2787 | nflags |= PVF_EXEC; |
2788 | if (flags & PMAP_WIRED) | | 2788 | if (flags & PMAP_WIRED) |
2789 | nflags |= PVF_WIRED; | | 2789 | nflags |= PVF_WIRED; |
2790 | | | 2790 | |
2791 | PMAP_MAP_TO_HEAD_LOCK(); | | 2791 | PMAP_MAP_TO_HEAD_LOCK(); |
2792 | pmap_acquire_pmap_lock(pm); | | 2792 | pmap_acquire_pmap_lock(pm); |
2793 | | | 2793 | |
2794 | /* | | 2794 | /* |
2795 | * Fetch the L2 bucket which maps this page, allocating one if | | 2795 | * Fetch the L2 bucket which maps this page, allocating one if |
2796 | * necessary for user pmaps. | | 2796 | * necessary for user pmaps. |
2797 | */ | | 2797 | */ |
2798 | if (pm == pmap_kernel()) | | 2798 | if (pm == pmap_kernel()) |
2799 | l2b = pmap_get_l2_bucket(pm, va); | | 2799 | l2b = pmap_get_l2_bucket(pm, va); |
2800 | else | | 2800 | else |
2801 | l2b = pmap_alloc_l2_bucket(pm, va); | | 2801 | l2b = pmap_alloc_l2_bucket(pm, va); |
2802 | if (l2b == NULL) { | | 2802 | if (l2b == NULL) { |
2803 | if (flags & PMAP_CANFAIL) { | | 2803 | if (flags & PMAP_CANFAIL) { |
2804 | pmap_release_pmap_lock(pm); | | 2804 | pmap_release_pmap_lock(pm); |
2805 | PMAP_MAP_TO_HEAD_UNLOCK(); | | 2805 | PMAP_MAP_TO_HEAD_UNLOCK(); |
2806 | return (ENOMEM); | | 2806 | return (ENOMEM); |
2807 | } | | 2807 | } |
2808 | panic("pmap_enter: failed to allocate L2 bucket"); | | 2808 | panic("pmap_enter: failed to allocate L2 bucket"); |
2809 | } | | 2809 | } |
2810 | ptep = &l2b->l2b_kva[l2pte_index(va)]; | | 2810 | ptep = &l2b->l2b_kva[l2pte_index(va)]; |
2811 | opte = *ptep; | | 2811 | opte = *ptep; |
2812 | npte = pa; | | 2812 | npte = pa; |
2813 | oflags = 0; | | 2813 | oflags = 0; |
2814 | | | 2814 | |
2815 | if (opte) { | | 2815 | if (opte) { |
2816 | /* | | 2816 | /* |
2817 | * There is already a mapping at this address. | | 2817 | * There is already a mapping at this address. |
2818 | * If the physical address is different, lookup the | | 2818 | * If the physical address is different, lookup the |
2819 | * vm_page. | | 2819 | * vm_page. |
2820 | */ | | 2820 | */ |
2821 | if (l2pte_pa(opte) != pa) | | 2821 | if (l2pte_pa(opte) != pa) |
2822 | opg = PHYS_TO_VM_PAGE(l2pte_pa(opte)); | | 2822 | opg = PHYS_TO_VM_PAGE(l2pte_pa(opte)); |
2823 | else | | 2823 | else |
2824 | opg = pg; | | 2824 | opg = pg; |
2825 | } else | | 2825 | } else |
2826 | opg = NULL; | | 2826 | opg = NULL; |
2827 | | | 2827 | |
2828 | if (pg) { | | 2828 | if (pg) { |
2829 | struct vm_page_md *md = VM_PAGE_TO_MD(pg); | | 2829 | struct vm_page_md *md = VM_PAGE_TO_MD(pg); |
2830 | | | 2830 | |
2831 | /* | | 2831 | /* |
2832 | * This is to be a managed mapping. | | 2832 | * This is to be a managed mapping. |
2833 | */ | | 2833 | */ |
2834 | if ((flags & VM_PROT_ALL) || | | 2834 | if ((flags & VM_PROT_ALL) || |
2835 | (md->pvh_attrs & PVF_REF)) { | | 2835 | (md->pvh_attrs & PVF_REF)) { |
2836 | /* | | 2836 | /* |
2837 | * - The access type indicates that we don't need | | 2837 | * - The access type indicates that we don't need |
2838 | * to do referenced emulation. | | 2838 | * to do referenced emulation. |
2839 | * OR | | 2839 | * OR |
2840 | * - The physical page has already been referenced | | 2840 | * - The physical page has already been referenced |
2841 | * so no need to re-do referenced emulation here. | | 2841 | * so no need to re-do referenced emulation here. |
2842 | */ | | 2842 | */ |
2843 | npte |= l2pte_set_readonly(L2_S_PROTO); | | 2843 | npte |= l2pte_set_readonly(L2_S_PROTO); |
2844 | | | 2844 | |
2845 | nflags |= PVF_REF; | | 2845 | nflags |= PVF_REF; |
2846 | | | 2846 | |
2847 | if ((prot & VM_PROT_WRITE) != 0 && | | 2847 | if ((prot & VM_PROT_WRITE) != 0 && |
2848 | ((flags & VM_PROT_WRITE) != 0 || | | 2848 | ((flags & VM_PROT_WRITE) != 0 || |
2849 | (md->pvh_attrs & PVF_MOD) != 0)) { | | 2849 | (md->pvh_attrs & PVF_MOD) != 0)) { |
2850 | /* | | 2850 | /* |
2851 | * This is a writable mapping, and the | | 2851 | * This is a writable mapping, and the |
2852 | * page's mod state indicates it has | | 2852 | * page's mod state indicates it has |
2853 | * already been modified. Make it | | 2853 | * already been modified. Make it |
2854 | * writable from the outset. | | 2854 | * writable from the outset. |
2855 | */ | | 2855 | */ |
2856 | npte = l2pte_set_writable(npte); | | 2856 | npte = l2pte_set_writable(npte); |
2857 | nflags |= PVF_MOD; | | 2857 | nflags |= PVF_MOD; |
2858 | } | | 2858 | } |
2859 | } else { | | 2859 | } else { |
2860 | /* | | 2860 | /* |
2861 | * Need to do page referenced emulation. | | 2861 | * Need to do page referenced emulation. |
2862 | */ | | 2862 | */ |
2863 | npte |= L2_TYPE_INV; | | 2863 | npte |= L2_TYPE_INV; |
2864 | } | | 2864 | } |
2865 | | | 2865 | |
2866 | npte |= pte_l2_s_cache_mode; | | 2866 | npte |= pte_l2_s_cache_mode; |
2867 | | | 2867 | |
2868 | if (pg == opg) { | | 2868 | if (pg == opg) { |
2869 | /* | | 2869 | /* |
2870 | * We're changing the attrs of an existing mapping. | | 2870 | * We're changing the attrs of an existing mapping. |
2871 | */ | | 2871 | */ |
2872 | simple_lock(&md->pvh_slock); | | 2872 | simple_lock(&md->pvh_slock); |
2873 | oflags = pmap_modify_pv(md, pa, pm, va, | | 2873 | oflags = pmap_modify_pv(md, pa, pm, va, |
2874 | PVF_WRITE | PVF_EXEC | PVF_WIRED | | | 2874 | PVF_WRITE | PVF_EXEC | PVF_WIRED | |
2875 | PVF_MOD | PVF_REF, nflags); | | 2875 | PVF_MOD | PVF_REF, nflags); |
2876 | simple_unlock(&md->pvh_slock); | | 2876 | simple_unlock(&md->pvh_slock); |
2877 | | | 2877 | |
2878 | #ifdef PMAP_CACHE_VIVT | | 2878 | #ifdef PMAP_CACHE_VIVT |
2879 | /* | | 2879 | /* |
2880 | * We may need to flush the cache if we're | | 2880 | * We may need to flush the cache if we're |
2881 | * doing rw-ro... | | 2881 | * doing rw-ro... |
2882 | */ | | 2882 | */ |
2883 | if (pm->pm_cstate.cs_cache_d && | | 2883 | if (pm->pm_cstate.cs_cache_d && |
2884 | (oflags & PVF_NC) == 0 && | | 2884 | (oflags & PVF_NC) == 0 && |
2885 | l2pte_writable_p(opte) && | | 2885 | l2pte_writable_p(opte) && |
2886 | (prot & VM_PROT_WRITE) == 0) | | 2886 | (prot & VM_PROT_WRITE) == 0) |
2887 | cpu_dcache_wb_range(va, PAGE_SIZE); | | 2887 | cpu_dcache_wb_range(va, PAGE_SIZE); |
2888 | #endif | | 2888 | #endif |
2889 | } else { | | 2889 | } else { |
2890 | /* | | 2890 | /* |
2891 | * New mapping, or changing the backing page | | 2891 | * New mapping, or changing the backing page |
2892 | * of an existing mapping. | | 2892 | * of an existing mapping. |
2893 | */ | | 2893 | */ |
2894 | if (opg) { | | 2894 | if (opg) { |
2895 | struct vm_page_md *omd = VM_PAGE_TO_MD(opg); | | 2895 | struct vm_page_md *omd = VM_PAGE_TO_MD(opg); |
2896 | paddr_t opa = VM_PAGE_TO_PHYS(opg); | | 2896 | paddr_t opa = VM_PAGE_TO_PHYS(opg); |
2897 | | | 2897 | |
2898 | /* | | 2898 | /* |
2899 | * Replacing an existing mapping with a new one. | | 2899 | * Replacing an existing mapping with a new one. |
2900 | * It is part of our managed memory so we | | 2900 | * It is part of our managed memory so we |
2901 | * must remove it from the PV list | | 2901 | * must remove it from the PV list |
2902 | */ | | 2902 | */ |
2903 | simple_lock(&omd->pvh_slock); | | 2903 | simple_lock(&omd->pvh_slock); |
2904 | pv = pmap_remove_pv(omd, opa, pm, va); | | 2904 | pv = pmap_remove_pv(omd, opa, pm, va); |
2905 | pmap_vac_me_harder(omd, opa, pm, 0); | | 2905 | pmap_vac_me_harder(omd, opa, pm, 0); |
2906 | simple_unlock(&omd->pvh_slock); | | 2906 | simple_unlock(&omd->pvh_slock); |
2907 | oflags = pv->pv_flags; | | 2907 | oflags = pv->pv_flags; |
2908 | | | 2908 | |
2909 | #ifdef PMAP_CACHE_VIVT | | 2909 | #ifdef PMAP_CACHE_VIVT |
2910 | /* | | 2910 | /* |
2911 | * If the old mapping was valid (ref/mod | | 2911 | * If the old mapping was valid (ref/mod |
2912 | * emulation creates 'invalid' mappings | | 2912 | * emulation creates 'invalid' mappings |
2913 | * initially) then make sure to frob | | 2913 | * initially) then make sure to frob |
2914 | * the cache. | | 2914 | * the cache. |
2915 | */ | | 2915 | */ |
2916 | if ((oflags & PVF_NC) == 0 && | | 2916 | if ((oflags & PVF_NC) == 0 && |
2917 | l2pte_valid(opte)) { | | 2917 | l2pte_valid(opte)) { |
2918 | if (PV_BEEN_EXECD(oflags)) { | | 2918 | if (PV_BEEN_EXECD(oflags)) { |
2919 | pmap_idcache_wbinv_range(pm, va, | | 2919 | pmap_idcache_wbinv_range(pm, va, |
2920 | PAGE_SIZE); | | 2920 | PAGE_SIZE); |
2921 | } else | | 2921 | } else |
2922 | if (PV_BEEN_REFD(oflags)) { | | 2922 | if (PV_BEEN_REFD(oflags)) { |
2923 | pmap_dcache_wb_range(pm, va, | | 2923 | pmap_dcache_wb_range(pm, va, |
2924 | PAGE_SIZE, true, | | 2924 | PAGE_SIZE, true, |
2925 | (oflags & PVF_WRITE) == 0); | | 2925 | (oflags & PVF_WRITE) == 0); |
2926 | } | | 2926 | } |
2927 | } | | 2927 | } |
2928 | #endif | | 2928 | #endif |
2929 | } else | | 2929 | } else |
2930 | if ((pv = pool_get(&pmap_pv_pool, PR_NOWAIT)) == NULL){ | | 2930 | if ((pv = pool_get(&pmap_pv_pool, PR_NOWAIT)) == NULL){ |
2931 | if ((flags & PMAP_CANFAIL) == 0) | | 2931 | if ((flags & PMAP_CANFAIL) == 0) |
2932 | panic("pmap_enter: no pv entries"); | | 2932 | panic("pmap_enter: no pv entries"); |
2933 | | | 2933 | |
2934 | if (pm != pmap_kernel()) | | 2934 | if (pm != pmap_kernel()) |
2935 | pmap_free_l2_bucket(pm, l2b, 0); | | 2935 | pmap_free_l2_bucket(pm, l2b, 0); |
2936 | pmap_release_pmap_lock(pm); | | 2936 | pmap_release_pmap_lock(pm); |
2937 | PMAP_MAP_TO_HEAD_UNLOCK(); | | 2937 | PMAP_MAP_TO_HEAD_UNLOCK(); |
2938 | NPDEBUG(PDB_ENTER, | | 2938 | NPDEBUG(PDB_ENTER, |
2939 | printf("pmap_enter: ENOMEM\n")); | | 2939 | printf("pmap_enter: ENOMEM\n")); |
2940 | return (ENOMEM); | | 2940 | return (ENOMEM); |
2941 | } | | 2941 | } |
2942 | | | 2942 | |
2943 | pmap_enter_pv(md, pa, pv, pm, va, nflags); | | 2943 | pmap_enter_pv(md, pa, pv, pm, va, nflags); |
2944 | } | | 2944 | } |
2945 | } else { | | 2945 | } else { |
2946 | /* | | 2946 | /* |
2947 | * We're mapping an unmanaged page. | | 2947 | * We're mapping an unmanaged page. |
2948 | * These are always readable, and possibly writable, from | | 2948 | * These are always readable, and possibly writable, from |
2949 | * the get go as we don't need to track ref/mod status. | | 2949 | * the get go as we don't need to track ref/mod status. |
2950 | */ | | 2950 | */ |
2951 | npte |= l2pte_set_readonly(L2_S_PROTO); | | 2951 | npte |= l2pte_set_readonly(L2_S_PROTO); |
2952 | if (prot & VM_PROT_WRITE) | | 2952 | if (prot & VM_PROT_WRITE) |
2953 | npte = l2pte_set_writable(npte); | | 2953 | npte = l2pte_set_writable(npte); |
2954 | | | 2954 | |
2955 | /* | | 2955 | /* |
2956 | * Make sure the vector table is mapped cacheable | | 2956 | * Make sure the vector table is mapped cacheable |
2957 | */ | | 2957 | */ |
2958 | if (pm != pmap_kernel() && va == vector_page) | | 2958 | if (pm != pmap_kernel() && va == vector_page) |
2959 | npte |= pte_l2_s_cache_mode; | | 2959 | npte |= pte_l2_s_cache_mode; |
2960 | | | 2960 | |
2961 | if (opg) { | | 2961 | if (opg) { |
2962 | /* | | 2962 | /* |
2963 | * Looks like there's an existing 'managed' mapping | | 2963 | * Looks like there's an existing 'managed' mapping |
2964 | * at this address. | | 2964 | * at this address. |
2965 | */ | | 2965 | */ |
2966 | struct vm_page_md *omd = VM_PAGE_TO_MD(opg); | | 2966 | struct vm_page_md *omd = VM_PAGE_TO_MD(opg); |
2967 | paddr_t opa = VM_PAGE_TO_PHYS(opg); | | 2967 | paddr_t opa = VM_PAGE_TO_PHYS(opg); |
2968 | | | 2968 | |
2969 | simple_lock(&omd->pvh_slock); | | 2969 | simple_lock(&omd->pvh_slock); |
2970 | pv = pmap_remove_pv(omd, opa, pm, va); | | 2970 | pv = pmap_remove_pv(omd, opa, pm, va); |
2971 | pmap_vac_me_harder(omd, opa, pm, 0); | | 2971 | pmap_vac_me_harder(omd, opa, pm, 0); |
2972 | simple_unlock(&omd->pvh_slock); | | 2972 | simple_unlock(&omd->pvh_slock); |
2973 | oflags = pv->pv_flags; | | 2973 | oflags = pv->pv_flags; |
2974 | | | 2974 | |
2975 | #ifdef PMAP_CACHE_VIVT | | 2975 | #ifdef PMAP_CACHE_VIVT |
2976 | if ((oflags & PVF_NC) == 0 && l2pte_valid(opte)) { | | 2976 | if ((oflags & PVF_NC) == 0 && l2pte_valid(opte)) { |
2977 | if (PV_BEEN_EXECD(oflags)) | | 2977 | if (PV_BEEN_EXECD(oflags)) |
2978 | pmap_idcache_wbinv_range(pm, va, | | 2978 | pmap_idcache_wbinv_range(pm, va, |
2979 | PAGE_SIZE); | | 2979 | PAGE_SIZE); |
2980 | else | | 2980 | else |
2981 | if (PV_BEEN_REFD(oflags)) | | 2981 | if (PV_BEEN_REFD(oflags)) |
2982 | pmap_dcache_wb_range(pm, va, PAGE_SIZE, | | 2982 | pmap_dcache_wb_range(pm, va, PAGE_SIZE, |
2983 | true, (oflags & PVF_WRITE) == 0); | | 2983 | true, (oflags & PVF_WRITE) == 0); |
2984 | } | | 2984 | } |
2985 | #endif | | 2985 | #endif |
2986 | pool_put(&pmap_pv_pool, pv); | | 2986 | pool_put(&pmap_pv_pool, pv); |
2987 | } | | 2987 | } |
2988 | } | | 2988 | } |
2989 | | | 2989 | |
2990 | /* | | 2990 | /* |
2991 | * Make sure userland mappings get the right permissions | | 2991 | * Make sure userland mappings get the right permissions |
2992 | */ | | 2992 | */ |
2993 | if (pm != pmap_kernel() && va != vector_page) | | 2993 | if (pm != pmap_kernel() && va != vector_page) |
2994 | npte |= L2_S_PROT_U; | | 2994 | npte |= L2_S_PROT_U; |
2995 | | | 2995 | |
2996 | /* | | 2996 | /* |
2997 | * Keep the stats up to date | | 2997 | * Keep the stats up to date |
2998 | */ | | 2998 | */ |
2999 | if (opte == 0) { | | 2999 | if (opte == 0) { |
3000 | l2b->l2b_occupancy++; | | 3000 | l2b->l2b_occupancy++; |
3001 | pm->pm_stats.resident_count++; | | 3001 | pm->pm_stats.resident_count++; |
3002 | } | | 3002 | } |
3003 | | | 3003 | |
3004 | NPDEBUG(PDB_ENTER, | | 3004 | NPDEBUG(PDB_ENTER, |
3005 | printf("pmap_enter: opte 0x%08x npte 0x%08x\n", opte, npte)); | | 3005 | printf("pmap_enter: opte 0x%08x npte 0x%08x\n", opte, npte)); |
3006 | | | 3006 | |
3007 | /* | | 3007 | /* |
3008 | * If this is just a wiring change, the two PTEs will be | | 3008 | * If this is just a wiring change, the two PTEs will be |
3009 | * identical, so there's no need to update the page table. | | 3009 | * identical, so there's no need to update the page table. |
3010 | */ | | 3010 | */ |
3011 | if (npte != opte) { | | 3011 | if (npte != opte) { |
3012 | bool is_cached = pmap_is_cached(pm); | | 3012 | bool is_cached = pmap_is_cached(pm); |
3013 | | | 3013 | |
3014 | *ptep = npte; | | 3014 | *ptep = npte; |
3015 | if (is_cached) { | | 3015 | if (is_cached) { |
3016 | /* | | 3016 | /* |
3017 | * We only need to frob the cache/tlb if this pmap | | 3017 | * We only need to frob the cache/tlb if this pmap |
3018 | * is current | | 3018 | * is current |
3019 | */ | | 3019 | */ |
3020 | PTE_SYNC(ptep); | | 3020 | PTE_SYNC(ptep); |
3021 | if (va != vector_page && l2pte_valid(npte)) { | | 3021 | if (va != vector_page && l2pte_valid(npte)) { |
3022 | /* | | 3022 | /* |
3023 | * This mapping is likely to be accessed as | | 3023 | * This mapping is likely to be accessed as |
3024 | * soon as we return to userland. Fix up the | | 3024 | * soon as we return to userland. Fix up the |
3025 | * L1 entry to avoid taking another | | 3025 | * L1 entry to avoid taking another |
3026 | * page/domain fault. | | 3026 | * page/domain fault. |
3027 | */ | | 3027 | */ |
3028 | pd_entry_t *pl1pd, l1pd; | | 3028 | pd_entry_t *pl1pd, l1pd; |
3029 | | | 3029 | |
3030 | pl1pd = &pm->pm_l1->l1_kva[L1_IDX(va)]; | | 3030 | pl1pd = &pm->pm_l1->l1_kva[L1_IDX(va)]; |
3031 | l1pd = l2b->l2b_phys | L1_C_DOM(pm->pm_domain) | | | 3031 | l1pd = l2b->l2b_phys | L1_C_DOM(pm->pm_domain) | |
3032 | L1_C_PROTO; | | 3032 | L1_C_PROTO; |
3033 | if (*pl1pd != l1pd) { | | 3033 | if (*pl1pd != l1pd) { |
3034 | *pl1pd = l1pd; | | 3034 | *pl1pd = l1pd; |
3035 | PTE_SYNC(pl1pd); | | 3035 | PTE_SYNC(pl1pd); |
3036 | } | | 3036 | } |
3037 | } | | 3037 | } |
3038 | } | | 3038 | } |
3039 | | | 3039 | |
3040 | if (PV_BEEN_EXECD(oflags)) | | 3040 | if (PV_BEEN_EXECD(oflags)) |
3041 | pmap_tlb_flushID_SE(pm, va); | | 3041 | pmap_tlb_flushID_SE(pm, va); |
3042 | else | | 3042 | else |
3043 | if (PV_BEEN_REFD(oflags)) | | 3043 | if (PV_BEEN_REFD(oflags)) |
3044 | pmap_tlb_flushD_SE(pm, va); | | 3044 | pmap_tlb_flushD_SE(pm, va); |
3045 | | | 3045 | |
3046 | NPDEBUG(PDB_ENTER, | | 3046 | NPDEBUG(PDB_ENTER, |
3047 | printf("pmap_enter: is_cached %d cs 0x%08x\n", | | 3047 | printf("pmap_enter: is_cached %d cs 0x%08x\n", |
3048 | is_cached, pm->pm_cstate.cs_all)); | | 3048 | is_cached, pm->pm_cstate.cs_all)); |
3049 | | | 3049 | |
3050 | if (pg != NULL) { | | 3050 | if (pg != NULL) { |
3051 | struct vm_page_md *md = VM_PAGE_TO_MD(pg); | | 3051 | struct vm_page_md *md = VM_PAGE_TO_MD(pg); |
3052 | | | 3052 | |
3053 | simple_lock(&md->pvh_slock); | | 3053 | simple_lock(&md->pvh_slock); |
3054 | pmap_vac_me_harder(md, pa, pm, va); | | 3054 | pmap_vac_me_harder(md, pa, pm, va); |
3055 | simple_unlock(&md->pvh_slock); | | 3055 | simple_unlock(&md->pvh_slock); |
3056 | } | | 3056 | } |
3057 | } | | 3057 | } |
3058 | #if defined(PMAP_CACHE_VIPT) && defined(DIAGNOSTIC) | | 3058 | #if defined(PMAP_CACHE_VIPT) && defined(DIAGNOSTIC) |
3059 | if (pg) { | | 3059 | if (pg) { |
3060 | struct vm_page_md *md = VM_PAGE_TO_MD(pg); | | 3060 | struct vm_page_md *md = VM_PAGE_TO_MD(pg); |
3061 | | | 3061 | |
3062 | simple_lock(&md->pvh_slock); | | 3062 | simple_lock(&md->pvh_slock); |
3063 | KASSERT((md->pvh_attrs & PVF_DMOD) == 0 || (md->pvh_attrs & (PVF_DIRTY|PVF_NC))); | | 3063 | KASSERT((md->pvh_attrs & PVF_DMOD) == 0 || (md->pvh_attrs & (PVF_DIRTY|PVF_NC))); |
3064 | KASSERT(((md->pvh_attrs & PVF_WRITE) == 0) == (md->urw_mappings + md->krw_mappings == 0)); | | 3064 | KASSERT(((md->pvh_attrs & PVF_WRITE) == 0) == (md->urw_mappings + md->krw_mappings == 0)); |
3065 | simple_unlock(&md->pvh_slock); | | 3065 | simple_unlock(&md->pvh_slock); |
3066 | } | | 3066 | } |
3067 | #endif | | 3067 | #endif |
3068 | | | 3068 | |
3069 | pmap_release_pmap_lock(pm); | | 3069 | pmap_release_pmap_lock(pm); |
3070 | PMAP_MAP_TO_HEAD_UNLOCK(); | | 3070 | PMAP_MAP_TO_HEAD_UNLOCK(); |
3071 | | | 3071 | |
3072 | return (0); | | 3072 | return (0); |
3073 | } | | 3073 | } |
3074 | | | 3074 | |
3075 | /* | | 3075 | /* |
3076 | * pmap_remove() | | 3076 | * pmap_remove() |
3077 | * | | 3077 | * |
3078 | * pmap_remove is responsible for nuking a number of mappings for a range | | 3078 | * pmap_remove is responsible for nuking a number of mappings for a range |
3079 | * of virtual address space in the current pmap. To do this efficiently | | 3079 | * of virtual address space in the current pmap. To do this efficiently |
3080 | * is interesting, because in a number of cases a wide virtual address | | 3080 | * is interesting, because in a number of cases a wide virtual address |
3081 | * range may be supplied that contains few actual mappings. So, the | | 3081 | * range may be supplied that contains few actual mappings. So, the |
3082 | * optimisations are: | | 3082 | * optimisations are: |
3083 | * 1. Skip over hunks of address space for which no L1 or L2 entry exists. | | 3083 | * 1. Skip over hunks of address space for which no L1 or L2 entry exists. |
3084 | * 2. Build up a list of pages we've hit, up to a maximum, so we can | | 3084 | * 2. Build up a list of pages we've hit, up to a maximum, so we can |
3085 | * maybe do just a partial cache clean. This path of execution is | | 3085 | * maybe do just a partial cache clean. This path of execution is |
3086 | * complicated by the fact that the cache must be flushed _before_ | | 3086 | * complicated by the fact that the cache must be flushed _before_ |
3087 | * the PTE is nuked, being a VAC :-) | | 3087 | * the PTE is nuked, being a VAC :-) |
3088 | * 3. If we're called after UVM calls pmap_remove_all(), we can defer | | 3088 | * 3. If we're called after UVM calls pmap_remove_all(), we can defer |
3089 | * all invalidations until pmap_update(), since pmap_remove_all() has | | 3089 | * all invalidations until pmap_update(), since pmap_remove_all() has |
3090 | * already flushed the cache. | | 3090 | * already flushed the cache. |
3091 | * 4. Maybe later fast-case a single page, but I don't think this is | | 3091 | * 4. Maybe later fast-case a single page, but I don't think this is |
3092 | * going to make _that_ much difference overall. | | 3092 | * going to make _that_ much difference overall. |
3093 | */ | | 3093 | */ |
3094 | | | 3094 | |
3095 | #define PMAP_REMOVE_CLEAN_LIST_SIZE 3 | | 3095 | #define PMAP_REMOVE_CLEAN_LIST_SIZE 3 |
3096 | | | 3096 | |
3097 | void | | 3097 | void |
3098 | pmap_remove(pmap_t pm, vaddr_t sva, vaddr_t eva) | | 3098 | pmap_remove(pmap_t pm, vaddr_t sva, vaddr_t eva) |
3099 | { | | 3099 | { |
3100 | struct l2_bucket *l2b; | | 3100 | struct l2_bucket *l2b; |
3101 | vaddr_t next_bucket; | | 3101 | vaddr_t next_bucket; |
3102 | pt_entry_t *ptep; | | 3102 | pt_entry_t *ptep; |
3103 | u_int cleanlist_idx, total, cnt; | | 3103 | u_int cleanlist_idx, total, cnt; |
3104 | struct { | | 3104 | struct { |
3105 | vaddr_t va; | | 3105 | vaddr_t va; |
3106 | pt_entry_t *ptep; | | 3106 | pt_entry_t *ptep; |
3107 | } cleanlist[PMAP_REMOVE_CLEAN_LIST_SIZE]; | | 3107 | } cleanlist[PMAP_REMOVE_CLEAN_LIST_SIZE]; |
3108 | u_int mappings, is_exec, is_refd; | | 3108 | u_int mappings, is_exec, is_refd; |
3109 | | | 3109 | |
3110 | NPDEBUG(PDB_REMOVE, printf("pmap_do_remove: pmap=%p sva=%08lx " | | 3110 | NPDEBUG(PDB_REMOVE, printf("pmap_do_remove: pmap=%p sva=%08lx " |
3111 | "eva=%08lx\n", pm, sva, eva)); | | 3111 | "eva=%08lx\n", pm, sva, eva)); |
3112 | | | 3112 | |
3113 | /* | | 3113 | /* |
3114 | * we lock in the pmap => pv_head direction | | 3114 | * we lock in the pmap => pv_head direction |
3115 | */ | | 3115 | */ |
3116 | PMAP_MAP_TO_HEAD_LOCK(); | | 3116 | PMAP_MAP_TO_HEAD_LOCK(); |
3117 | pmap_acquire_pmap_lock(pm); | | 3117 | pmap_acquire_pmap_lock(pm); |
3118 | | | 3118 | |
3119 | if (pm->pm_remove_all || !pmap_is_cached(pm)) { | | 3119 | if (pm->pm_remove_all || !pmap_is_cached(pm)) { |
3120 | cleanlist_idx = PMAP_REMOVE_CLEAN_LIST_SIZE + 1; | | 3120 | cleanlist_idx = PMAP_REMOVE_CLEAN_LIST_SIZE + 1; |
3121 | if (pm->pm_cstate.cs_tlb == 0) | | 3121 | if (pm->pm_cstate.cs_tlb == 0) |
3122 | pm->pm_remove_all = true; | | 3122 | pm->pm_remove_all = true; |
3123 | } else | | 3123 | } else |
3124 | cleanlist_idx = 0; | | 3124 | cleanlist_idx = 0; |
3125 | | | 3125 | |
3126 | total = 0; | | 3126 | total = 0; |
3127 | | | 3127 | |
3128 | while (sva < eva) { | | 3128 | while (sva < eva) { |
3129 | /* | | 3129 | /* |
3130 | * Do one L2 bucket's worth at a time. | | 3130 | * Do one L2 bucket's worth at a time. |
3131 | */ | | 3131 | */ |
3132 | next_bucket = L2_NEXT_BUCKET(sva); | | 3132 | next_bucket = L2_NEXT_BUCKET(sva); |
3133 | if (next_bucket > eva) | | 3133 | if (next_bucket > eva) |
3134 | next_bucket = eva; | | 3134 | next_bucket = eva; |
3135 | | | 3135 | |
3136 | l2b = pmap_get_l2_bucket(pm, sva); | | 3136 | l2b = pmap_get_l2_bucket(pm, sva); |
3137 | if (l2b == NULL) { | | 3137 | if (l2b == NULL) { |
3138 | sva = next_bucket; | | 3138 | sva = next_bucket; |
3139 | continue; | | 3139 | continue; |
3140 | } | | 3140 | } |
3141 | | | 3141 | |
3142 | ptep = &l2b->l2b_kva[l2pte_index(sva)]; | | 3142 | ptep = &l2b->l2b_kva[l2pte_index(sva)]; |
3143 | | | 3143 | |
3144 | for (mappings = 0; sva < next_bucket; sva += PAGE_SIZE, ptep++){ | | 3144 | for (mappings = 0; sva < next_bucket; sva += PAGE_SIZE, ptep++){ |
3145 | struct vm_page *pg; | | 3145 | struct vm_page *pg; |
3146 | pt_entry_t pte; | | 3146 | pt_entry_t pte; |
3147 | paddr_t pa; | | 3147 | paddr_t pa; |
3148 | | | 3148 | |
3149 | pte = *ptep; | | 3149 | pte = *ptep; |
3150 | | | 3150 | |
3151 | if (pte == 0) { | | 3151 | if (pte == 0) { |
3152 | /* Nothing here, move along */ | | 3152 | /* Nothing here, move along */ |
3153 | continue; | | 3153 | continue; |
3154 | } | | 3154 | } |
3155 | | | 3155 | |
3156 | pa = l2pte_pa(pte); | | 3156 | pa = l2pte_pa(pte); |
3157 | is_exec = 0; | | 3157 | is_exec = 0; |
3158 | is_refd = 1; | | 3158 | is_refd = 1; |
3159 | | | 3159 | |
3160 | /* | | 3160 | /* |
3161 | * Update flags. In a number of circumstances, | | 3161 | * Update flags. In a number of circumstances, |
3162 | * we could cluster a lot of these and do a | | 3162 | * we could cluster a lot of these and do a |
3163 | * number of sequential pages in one go. | | 3163 | * number of sequential pages in one go. |
3164 | */ | | 3164 | */ |
3165 | if ((pg = PHYS_TO_VM_PAGE(pa)) != NULL) { | | 3165 | if ((pg = PHYS_TO_VM_PAGE(pa)) != NULL) { |
3166 | struct vm_page_md *md = VM_PAGE_TO_MD(pg); | | 3166 | struct vm_page_md *md = VM_PAGE_TO_MD(pg); |
3167 | struct pv_entry *pv; | | 3167 | struct pv_entry *pv; |
3168 | | | 3168 | |
3169 | simple_lock(&md->pvh_slock); | | 3169 | simple_lock(&md->pvh_slock); |
3170 | pv = pmap_remove_pv(md, pa, pm, sva); | | 3170 | pv = pmap_remove_pv(md, pa, pm, sva); |
3171 | pmap_vac_me_harder(md, pa, pm, 0); | | 3171 | pmap_vac_me_harder(md, pa, pm, 0); |
3172 | simple_unlock(&md->pvh_slock); | | 3172 | simple_unlock(&md->pvh_slock); |
3173 | if (pv != NULL) { | | 3173 | if (pv != NULL) { |
3174 | if (pm->pm_remove_all == false) { | | 3174 | if (pm->pm_remove_all == false) { |
3175 | is_exec = | | 3175 | is_exec = |
3176 | PV_BEEN_EXECD(pv->pv_flags); | | 3176 | PV_BEEN_EXECD(pv->pv_flags); |
3177 | is_refd = | | 3177 | is_refd = |
3178 | PV_BEEN_REFD(pv->pv_flags); | | 3178 | PV_BEEN_REFD(pv->pv_flags); |
3179 | } | | 3179 | } |
3180 | pool_put(&pmap_pv_pool, pv); | | 3180 | pool_put(&pmap_pv_pool, pv); |
3181 | } | | 3181 | } |
3182 | } | | 3182 | } |
3183 | mappings++; | | 3183 | mappings++; |
3184 | | | 3184 | |
3185 | if (!l2pte_valid(pte)) { | | 3185 | if (!l2pte_valid(pte)) { |
3186 | /* | | 3186 | /* |
3187 | * Ref/Mod emulation is still active for this | | 3187 | * Ref/Mod emulation is still active for this |
3188 | * mapping, therefore it is has not yet been | | 3188 | * mapping, therefore it is has not yet been |
3189 | * accessed. No need to frob the cache/tlb. | | 3189 | * accessed. No need to frob the cache/tlb. |
3190 | */ | | 3190 | */ |
3191 | *ptep = 0; | | 3191 | *ptep = 0; |
3192 | PTE_SYNC_CURRENT(pm, ptep); | | 3192 | PTE_SYNC_CURRENT(pm, ptep); |
3193 | continue; | | 3193 | continue; |
3194 | } | | 3194 | } |
3195 | | | 3195 | |
3196 | if (cleanlist_idx < PMAP_REMOVE_CLEAN_LIST_SIZE) { | | 3196 | if (cleanlist_idx < PMAP_REMOVE_CLEAN_LIST_SIZE) { |
3197 | /* Add to the clean list. */ | | 3197 | /* Add to the clean list. */ |
3198 | cleanlist[cleanlist_idx].ptep = ptep; | | 3198 | cleanlist[cleanlist_idx].ptep = ptep; |
3199 | cleanlist[cleanlist_idx].va = | | 3199 | cleanlist[cleanlist_idx].va = |
3200 | sva | (is_exec & 1); | | 3200 | sva | (is_exec & 1); |
3201 | cleanlist_idx++; | | 3201 | cleanlist_idx++; |
3202 | } else | | 3202 | } else |
3203 | if (cleanlist_idx == PMAP_REMOVE_CLEAN_LIST_SIZE) { | | 3203 | if (cleanlist_idx == PMAP_REMOVE_CLEAN_LIST_SIZE) { |
3204 | /* Nuke everything if needed. */ | | 3204 | /* Nuke everything if needed. */ |
3205 | #ifdef PMAP_CACHE_VIVT | | 3205 | #ifdef PMAP_CACHE_VIVT |
3206 | pmap_idcache_wbinv_all(pm); | | 3206 | pmap_idcache_wbinv_all(pm); |
3207 | #endif | | 3207 | #endif |
3208 | pmap_tlb_flushID(pm); | | 3208 | pmap_tlb_flushID(pm); |
3209 | | | 3209 | |
3210 | /* | | 3210 | /* |
3211 | * Roll back the previous PTE list, | | 3211 | * Roll back the previous PTE list, |
3212 | * and zero out the current PTE. | | 3212 | * and zero out the current PTE. |
3213 | */ | | 3213 | */ |
3214 | for (cnt = 0; | | 3214 | for (cnt = 0; |
3215 | cnt < PMAP_REMOVE_CLEAN_LIST_SIZE; cnt++) { | | 3215 | cnt < PMAP_REMOVE_CLEAN_LIST_SIZE; cnt++) { |
3216 | *cleanlist[cnt].ptep = 0; | | 3216 | *cleanlist[cnt].ptep = 0; |
3217 | PTE_SYNC(cleanlist[cnt].ptep); | | 3217 | PTE_SYNC(cleanlist[cnt].ptep); |
3218 | } | | 3218 | } |
3219 | *ptep = 0; | | 3219 | *ptep = 0; |
3220 | PTE_SYNC(ptep); | | 3220 | PTE_SYNC(ptep); |
3221 | cleanlist_idx++; | | 3221 | cleanlist_idx++; |
3222 | pm->pm_remove_all = true; | | 3222 | pm->pm_remove_all = true; |
3223 | } else { | | 3223 | } else { |
3224 | *ptep = 0; | | 3224 | *ptep = 0; |
3225 | PTE_SYNC(ptep); | | 3225 | PTE_SYNC(ptep); |
3226 | if (pm->pm_remove_all == false) { | | 3226 | if (pm->pm_remove_all == false) { |
3227 | if (is_exec) | | 3227 | if (is_exec) |
3228 | pmap_tlb_flushID_SE(pm, sva); | | 3228 | pmap_tlb_flushID_SE(pm, sva); |
3229 | else | | 3229 | else |
3230 | if (is_refd) | | 3230 | if (is_refd) |
3231 | pmap_tlb_flushD_SE(pm, sva); | | 3231 | pmap_tlb_flushD_SE(pm, sva); |
3232 | } | | 3232 | } |
3233 | } | | 3233 | } |
3234 | } | | 3234 | } |
3235 | | | 3235 | |
3236 | /* | | 3236 | /* |
3237 | * Deal with any left overs | | 3237 | * Deal with any left overs |
3238 | */ | | 3238 | */ |
3239 | if (cleanlist_idx <= PMAP_REMOVE_CLEAN_LIST_SIZE) { | | 3239 | if (cleanlist_idx <= PMAP_REMOVE_CLEAN_LIST_SIZE) { |
3240 | total += cleanlist_idx; | | 3240 | total += cleanlist_idx; |
3241 | for (cnt = 0; cnt < cleanlist_idx; cnt++) { | | 3241 | for (cnt = 0; cnt < cleanlist_idx; cnt++) { |
3242 | if (pm->pm_cstate.cs_all != 0) { | | 3242 | if (pm->pm_cstate.cs_all != 0) { |
3243 | vaddr_t clva = cleanlist[cnt].va & ~1; | | 3243 | vaddr_t clva = cleanlist[cnt].va & ~1; |
3244 | if (cleanlist[cnt].va & 1) { | | 3244 | if (cleanlist[cnt].va & 1) { |
3245 | #ifdef PMAP_CACHE_VIVT | | 3245 | #ifdef PMAP_CACHE_VIVT |
3246 | pmap_idcache_wbinv_range(pm, | | 3246 | pmap_idcache_wbinv_range(pm, |
3247 | clva, PAGE_SIZE); | | 3247 | clva, PAGE_SIZE); |
3248 | #endif | | 3248 | #endif |
3249 | pmap_tlb_flushID_SE(pm, clva); | | 3249 | pmap_tlb_flushID_SE(pm, clva); |
3250 | } else { | | 3250 | } else { |
3251 | #ifdef PMAP_CACHE_VIVT | | 3251 | #ifdef PMAP_CACHE_VIVT |
3252 | pmap_dcache_wb_range(pm, | | 3252 | pmap_dcache_wb_range(pm, |
3253 | clva, PAGE_SIZE, true, | | 3253 | clva, PAGE_SIZE, true, |
3254 | false); | | 3254 | false); |
3255 | #endif | | 3255 | #endif |
3256 | pmap_tlb_flushD_SE(pm, clva); | | 3256 | pmap_tlb_flushD_SE(pm, clva); |
3257 | } | | 3257 | } |
3258 | } | | 3258 | } |
3259 | *cleanlist[cnt].ptep = 0; | | 3259 | *cleanlist[cnt].ptep = 0; |
3260 | PTE_SYNC_CURRENT(pm, cleanlist[cnt].ptep); | | 3260 | PTE_SYNC_CURRENT(pm, cleanlist[cnt].ptep); |
3261 | } | | 3261 | } |
3262 | | | 3262 | |
3263 | /* | | 3263 | /* |
3264 | * If it looks like we're removing a whole bunch | | 3264 | * If it looks like we're removing a whole bunch |
3265 | * of mappings, it's faster to just write-back | | 3265 | * of mappings, it's faster to just write-back |
3266 | * the whole cache now and defer TLB flushes until | | 3266 | * the whole cache now and defer TLB flushes until |
3267 | * pmap_update() is called. | | 3267 | * pmap_update() is called. |
3268 | */ | | 3268 | */ |
3269 | if (total <= PMAP_REMOVE_CLEAN_LIST_SIZE) | | 3269 | if (total <= PMAP_REMOVE_CLEAN_LIST_SIZE) |
3270 | cleanlist_idx = 0; | | 3270 | cleanlist_idx = 0; |
3271 | else { | | 3271 | else { |
3272 | cleanlist_idx = PMAP_REMOVE_CLEAN_LIST_SIZE + 1; | | 3272 | cleanlist_idx = PMAP_REMOVE_CLEAN_LIST_SIZE + 1; |
3273 | #ifdef PMAP_CACHE_VIVT | | 3273 | #ifdef PMAP_CACHE_VIVT |
3274 | pmap_idcache_wbinv_all(pm); | | 3274 | pmap_idcache_wbinv_all(pm); |
3275 | #endif | | 3275 | #endif |
3276 | pm->pm_remove_all = true; | | 3276 | pm->pm_remove_all = true; |
3277 | } | | 3277 | } |
3278 | } | | 3278 | } |
3279 | | | 3279 | |
3280 | pmap_free_l2_bucket(pm, l2b, mappings); | | 3280 | pmap_free_l2_bucket(pm, l2b, mappings); |
3281 | pm->pm_stats.resident_count -= mappings; | | 3281 | pm->pm_stats.resident_count -= mappings; |
3282 | } | | 3282 | } |
3283 | | | 3283 | |
3284 | pmap_release_pmap_lock(pm); | | 3284 | pmap_release_pmap_lock(pm); |
3285 | PMAP_MAP_TO_HEAD_UNLOCK(); | | 3285 | PMAP_MAP_TO_HEAD_UNLOCK(); |
3286 | } | | 3286 | } |
3287 | | | 3287 | |
3288 | #ifdef PMAP_CACHE_VIPT | | 3288 | #ifdef PMAP_CACHE_VIPT |
3289 | static struct pv_entry * | | 3289 | static struct pv_entry * |
3290 | pmap_kremove_pg(struct vm_page *pg, vaddr_t va) | | 3290 | pmap_kremove_pg(struct vm_page *pg, vaddr_t va) |
3291 | { | | 3291 | { |
3292 | struct vm_page_md *md = VM_PAGE_TO_MD(pg); | | 3292 | struct vm_page_md *md = VM_PAGE_TO_MD(pg); |
3293 | paddr_t pa = VM_PAGE_TO_PHYS(pg); | | 3293 | paddr_t pa = VM_PAGE_TO_PHYS(pg); |
3294 | struct pv_entry *pv; | | 3294 | struct pv_entry *pv; |
3295 | | | 3295 | |
3296 | simple_lock(&md->pvh_slock); | | 3296 | simple_lock(&md->pvh_slock); |
3297 | KASSERT(arm_cache_prefer_mask == 0 || md->pvh_attrs & (PVF_COLORED|PVF_NC)); | | 3297 | KASSERT(arm_cache_prefer_mask == 0 || md->pvh_attrs & (PVF_COLORED|PVF_NC)); |
3298 | KASSERT((md->pvh_attrs & PVF_KMPAGE) == 0); | | 3298 | KASSERT((md->pvh_attrs & PVF_KMPAGE) == 0); |
3299 | | | 3299 | |
3300 | pv = pmap_remove_pv(md, pa, pmap_kernel(), va); | | 3300 | pv = pmap_remove_pv(md, pa, pmap_kernel(), va); |
3301 | KASSERT(pv); | | 3301 | KASSERT(pv); |
3302 | KASSERT(pv->pv_flags & PVF_KENTRY); | | 3302 | KASSERT(pv->pv_flags & PVF_KENTRY); |
3303 | | | 3303 | |
3304 | /* | | 3304 | /* |
3305 | * If we are removing a writeable mapping to a cached exec page, | | 3305 | * If we are removing a writeable mapping to a cached exec page, |
3306 | * if it's the last mapping then clear it execness other sync | | 3306 | * if it's the last mapping then clear it execness other sync |
3307 | * the page to the icache. | | 3307 | * the page to the icache. |
3308 | */ | | 3308 | */ |
3309 | if ((md->pvh_attrs & (PVF_NC|PVF_EXEC)) == PVF_EXEC | | 3309 | if ((md->pvh_attrs & (PVF_NC|PVF_EXEC)) == PVF_EXEC |
3310 | && (pv->pv_flags & PVF_WRITE) != 0) { | | 3310 | && (pv->pv_flags & PVF_WRITE) != 0) { |
3311 | if (SLIST_EMPTY(&md->pvh_list)) { | | 3311 | if (SLIST_EMPTY(&md->pvh_list)) { |
3312 | md->pvh_attrs &= ~PVF_EXEC; | | 3312 | md->pvh_attrs &= ~PVF_EXEC; |
3313 | PMAPCOUNT(exec_discarded_kremove); | | 3313 | PMAPCOUNT(exec_discarded_kremove); |
3314 | } else { | | 3314 | } else { |
3315 | pmap_syncicache_page(md, pa); | | 3315 | pmap_syncicache_page(md, pa); |
3316 | PMAPCOUNT(exec_synced_kremove); | | 3316 | PMAPCOUNT(exec_synced_kremove); |
3317 | } | | 3317 | } |
3318 | } | | 3318 | } |
3319 | pmap_vac_me_harder(md, pa, pmap_kernel(), 0); | | 3319 | pmap_vac_me_harder(md, pa, pmap_kernel(), 0); |
3320 | simple_unlock(&md->pvh_slock); | | 3320 | simple_unlock(&md->pvh_slock); |
3321 | | | 3321 | |
3322 | return pv; | | 3322 | return pv; |
3323 | } | | 3323 | } |
3324 | #endif /* PMAP_CACHE_VIPT */ | | 3324 | #endif /* PMAP_CACHE_VIPT */ |
3325 | | | 3325 | |
3326 | /* | | 3326 | /* |
3327 | * pmap_kenter_pa: enter an unmanaged, wired kernel mapping | | 3327 | * pmap_kenter_pa: enter an unmanaged, wired kernel mapping |
3328 | * | | 3328 | * |
3329 | * We assume there is already sufficient KVM space available | | 3329 | * We assume there is already sufficient KVM space available |
3330 | * to do this, as we can't allocate L2 descriptor tables/metadata | | 3330 | * to do this, as we can't allocate L2 descriptor tables/metadata |
3331 | * from here. | | 3331 | * from here. |
3332 | */ | | 3332 | */ |
3333 | void | | 3333 | void |
3334 | pmap_kenter_pa(vaddr_t va, paddr_t pa, vm_prot_t prot, u_int flags) | | 3334 | pmap_kenter_pa(vaddr_t va, paddr_t pa, vm_prot_t prot, u_int flags) |
3335 | { | | 3335 | { |
3336 | struct l2_bucket *l2b; | | 3336 | struct l2_bucket *l2b; |
3337 | pt_entry_t *ptep, opte; | | 3337 | pt_entry_t *ptep, opte; |
3338 | #ifdef PMAP_CACHE_VIVT | | 3338 | #ifdef PMAP_CACHE_VIVT |
3339 | struct vm_page *pg = (flags & PMAP_KMPAGE) ? PHYS_TO_VM_PAGE(pa) : NULL; | | 3339 | struct vm_page *pg = (flags & PMAP_KMPAGE) ? PHYS_TO_VM_PAGE(pa) : NULL; |
3340 | #endif | | 3340 | #endif |
3341 | #ifdef PMAP_CACHE_VIPT | | 3341 | #ifdef PMAP_CACHE_VIPT |
3342 | struct vm_page *pg = PHYS_TO_VM_PAGE(pa); | | 3342 | struct vm_page *pg = PHYS_TO_VM_PAGE(pa); |
3343 | struct vm_page *opg; | | 3343 | struct vm_page *opg; |
3344 | struct pv_entry *pv = NULL; | | 3344 | struct pv_entry *pv = NULL; |
3345 | #endif | | 3345 | #endif |
3346 | struct vm_page_md *md = VM_PAGE_TO_MD(pg); | | 3346 | struct vm_page_md *md = VM_PAGE_TO_MD(pg); |
3347 | | | 3347 | |
3348 | NPDEBUG(PDB_KENTER, | | 3348 | NPDEBUG(PDB_KENTER, |
3349 | printf("pmap_kenter_pa: va 0x%08lx, pa 0x%08lx, prot 0x%x\n", | | 3349 | printf("pmap_kenter_pa: va 0x%08lx, pa 0x%08lx, prot 0x%x\n", |
3350 | va, pa, prot)); | | 3350 | va, pa, prot)); |
3351 | | | 3351 | |
3352 | l2b = pmap_get_l2_bucket(pmap_kernel(), va); | | 3352 | l2b = pmap_get_l2_bucket(pmap_kernel(), va); |
3353 | KDASSERT(l2b != NULL); | | 3353 | KDASSERT(l2b != NULL); |
3354 | | | 3354 | |
3355 | ptep = &l2b->l2b_kva[l2pte_index(va)]; | | 3355 | ptep = &l2b->l2b_kva[l2pte_index(va)]; |
3356 | opte = *ptep; | | 3356 | opte = *ptep; |
3357 | | | 3357 | |
3358 | if (opte == 0) { | | 3358 | if (opte == 0) { |
3359 | PMAPCOUNT(kenter_mappings); | | 3359 | PMAPCOUNT(kenter_mappings); |
3360 | l2b->l2b_occupancy++; | | 3360 | l2b->l2b_occupancy++; |
3361 | } else { | | 3361 | } else { |
3362 | PMAPCOUNT(kenter_remappings); | | 3362 | PMAPCOUNT(kenter_remappings); |
3363 | #ifdef PMAP_CACHE_VIPT | | 3363 | #ifdef PMAP_CACHE_VIPT |
3364 | opg = PHYS_TO_VM_PAGE(l2pte_pa(opte)); | | 3364 | opg = PHYS_TO_VM_PAGE(l2pte_pa(opte)); |
3365 | struct vm_page_md *omd = VM_PAGE_TO_MD(opg); | | 3365 | struct vm_page_md *omd = VM_PAGE_TO_MD(opg); |
3366 | if (opg) { | | 3366 | if (opg) { |
3367 | KASSERT(opg != pg); | | 3367 | KASSERT(opg != pg); |
3368 | KASSERT((omd->pvh_attrs & PVF_KMPAGE) == 0); | | 3368 | KASSERT((omd->pvh_attrs & PVF_KMPAGE) == 0); |
3369 | KASSERT((flags & PMAP_KMPAGE) == 0); | | 3369 | KASSERT((flags & PMAP_KMPAGE) == 0); |
3370 | simple_lock(&omd->pvh_slock); | | 3370 | simple_lock(&omd->pvh_slock); |
3371 | pv = pmap_kremove_pg(opg, va); | | 3371 | pv = pmap_kremove_pg(opg, va); |
3372 | simple_unlock(&omd->pvh_slock); | | 3372 | simple_unlock(&omd->pvh_slock); |
3373 | } | | 3373 | } |
3374 | #endif | | 3374 | #endif |
3375 | if (l2pte_valid(opte)) { | | 3375 | if (l2pte_valid(opte)) { |
3376 | #ifdef PMAP_CACHE_VIVT | | 3376 | #ifdef PMAP_CACHE_VIVT |
3377 | cpu_dcache_wbinv_range(va, PAGE_SIZE); | | 3377 | cpu_dcache_wbinv_range(va, PAGE_SIZE); |
3378 | #endif | | 3378 | #endif |
3379 | cpu_tlb_flushD_SE(va); | | 3379 | cpu_tlb_flushD_SE(va); |
3380 | cpu_cpwait(); | | 3380 | cpu_cpwait(); |
3381 | } | | 3381 | } |
3382 | } | | 3382 | } |
3383 | | | 3383 | |
3384 | *ptep = L2_S_PROTO | pa | L2_S_PROT(PTE_KERNEL, prot) | | | 3384 | *ptep = L2_S_PROTO | pa | L2_S_PROT(PTE_KERNEL, prot) | |
3385 | pte_l2_s_cache_mode; | | 3385 | pte_l2_s_cache_mode; |
3386 | PTE_SYNC(ptep); | | 3386 | PTE_SYNC(ptep); |
3387 | | | 3387 | |
3388 | if (pg) { | | 3388 | if (pg) { |
3389 | if (flags & PMAP_KMPAGE) { | | 3389 | if (flags & PMAP_KMPAGE) { |
3390 | simple_lock(&md->pvh_slock); | | 3390 | simple_lock(&md->pvh_slock); |
3391 | KASSERT(md->urw_mappings == 0); | | 3391 | KASSERT(md->urw_mappings == 0); |
3392 | KASSERT(md->uro_mappings == 0); | | 3392 | KASSERT(md->uro_mappings == 0); |
3393 | KASSERT(md->krw_mappings == 0); | | 3393 | KASSERT(md->krw_mappings == 0); |
3394 | KASSERT(md->kro_mappings == 0); | | 3394 | KASSERT(md->kro_mappings == 0); |
3395 | #ifdef PMAP_CACHE_VIPT | | 3395 | #ifdef PMAP_CACHE_VIPT |
3396 | KASSERT(pv == NULL); | | 3396 | KASSERT(pv == NULL); |
3397 | KASSERT(arm_cache_prefer_mask == 0 || (va & PVF_COLORED) == 0); | | 3397 | KASSERT(arm_cache_prefer_mask == 0 || (va & PVF_COLORED) == 0); |
3398 | KASSERT((md->pvh_attrs & PVF_NC) == 0); | | 3398 | KASSERT((md->pvh_attrs & PVF_NC) == 0); |
3399 | /* if there is a color conflict, evict from cache. */ | | 3399 | /* if there is a color conflict, evict from cache. */ |
3400 | if (pmap_is_page_colored_p(md) | | 3400 | if (pmap_is_page_colored_p(md) |
3401 | && ((va ^ md->pvh_attrs) & arm_cache_prefer_mask)) { | | 3401 | && ((va ^ md->pvh_attrs) & arm_cache_prefer_mask)) { |
3402 | PMAPCOUNT(vac_color_change); | | 3402 | PMAPCOUNT(vac_color_change); |
3403 | pmap_flush_page(md, pa, PMAP_FLUSH_PRIMARY); | | 3403 | pmap_flush_page(md, pa, PMAP_FLUSH_PRIMARY); |
3404 | } else if (md->pvh_attrs & PVF_MULTCLR) { | | 3404 | } else if (md->pvh_attrs & PVF_MULTCLR) { |
3405 | /* | | 3405 | /* |
3406 | * If this page has multiple colors, expunge | | 3406 | * If this page has multiple colors, expunge |
3407 | * them. | | 3407 | * them. |
3408 | */ | | 3408 | */ |
3409 | PMAPCOUNT(vac_flush_lots2); | | 3409 | PMAPCOUNT(vac_flush_lots2); |
3410 | pmap_flush_page(md, pa, PMAP_FLUSH_SECONDARY); | | 3410 | pmap_flush_page(md, pa, PMAP_FLUSH_SECONDARY); |
3411 | } | | 3411 | } |
3412 | md->pvh_attrs &= PAGE_SIZE - 1; | | 3412 | md->pvh_attrs &= PAGE_SIZE - 1; |
3413 | md->pvh_attrs |= PVF_KMPAGE | | 3413 | md->pvh_attrs |= PVF_KMPAGE |
3414 | | PVF_COLORED | PVF_DIRTY | | 3414 | | PVF_COLORED | PVF_DIRTY |
3415 | | (va & arm_cache_prefer_mask); | | 3415 | | (va & arm_cache_prefer_mask); |
3416 | #endif | | 3416 | #endif |
3417 | #ifdef PMAP_CACHE_VIVT | | 3417 | #ifdef PMAP_CACHE_VIVT |
3418 | md->pvh_attrs |= PVF_KMPAGE; | | 3418 | md->pvh_attrs |= PVF_KMPAGE; |
3419 | #endif | | 3419 | #endif |
3420 | pmap_kmpages++; | | 3420 | pmap_kmpages++; |
3421 | simple_unlock(&md->pvh_slock); | | 3421 | simple_unlock(&md->pvh_slock); |
3422 | #ifdef PMAP_CACHE_VIPT | | 3422 | #ifdef PMAP_CACHE_VIPT |
3423 | } else { | | 3423 | } else { |
3424 | if (pv == NULL) { | | 3424 | if (pv == NULL) { |
3425 | pv = pool_get(&pmap_pv_pool, PR_NOWAIT); | | 3425 | pv = pool_get(&pmap_pv_pool, PR_NOWAIT); |
3426 | KASSERT(pv != NULL); | | 3426 | KASSERT(pv != NULL); |
3427 | } | | 3427 | } |
3428 | pmap_enter_pv(md, pa, pv, pmap_kernel(), va, | | 3428 | pmap_enter_pv(md, pa, pv, pmap_kernel(), va, |
3429 | PVF_WIRED | PVF_KENTRY | | 3429 | PVF_WIRED | PVF_KENTRY |
3430 | | (prot & VM_PROT_WRITE ? PVF_WRITE : 0)); | | 3430 | | (prot & VM_PROT_WRITE ? PVF_WRITE : 0)); |
3431 | if ((prot & VM_PROT_WRITE) | | 3431 | if ((prot & VM_PROT_WRITE) |
3432 | && !(md->pvh_attrs & PVF_NC)) | | 3432 | && !(md->pvh_attrs & PVF_NC)) |
3433 | md->pvh_attrs |= PVF_DIRTY; | | 3433 | md->pvh_attrs |= PVF_DIRTY; |
3434 | KASSERT((prot & VM_PROT_WRITE) == 0 || (md->pvh_attrs & (PVF_DIRTY|PVF_NC))); | | 3434 | KASSERT((prot & VM_PROT_WRITE) == 0 || (md->pvh_attrs & (PVF_DIRTY|PVF_NC))); |
3435 | simple_lock(&md->pvh_slock); | | 3435 | simple_lock(&md->pvh_slock); |
3436 | pmap_vac_me_harder(md, pa, pmap_kernel(), va); | | 3436 | pmap_vac_me_harder(md, pa, pmap_kernel(), va); |
3437 | simple_unlock(&md->pvh_slock); | | 3437 | simple_unlock(&md->pvh_slock); |
3438 | #endif | | 3438 | #endif |
3439 | } | | 3439 | } |
3440 | #ifdef PMAP_CACHE_VIPT | | 3440 | #ifdef PMAP_CACHE_VIPT |
3441 | } else { | | 3441 | } else { |
3442 | if (pv != NULL) | | 3442 | if (pv != NULL) |
3443 | pool_put(&pmap_pv_pool, pv); | | 3443 | pool_put(&pmap_pv_pool, pv); |
3444 | #endif | | 3444 | #endif |
3445 | } | | 3445 | } |
3446 | } | | 3446 | } |
3447 | | | 3447 | |
3448 | void | | 3448 | void |
3449 | pmap_kremove(vaddr_t va, vsize_t len) | | 3449 | pmap_kremove(vaddr_t va, vsize_t len) |
3450 | { | | 3450 | { |
3451 | struct l2_bucket *l2b; | | 3451 | struct l2_bucket *l2b; |
3452 | pt_entry_t *ptep, *sptep, opte; | | 3452 | pt_entry_t *ptep, *sptep, opte; |
3453 | vaddr_t next_bucket, eva; | | 3453 | vaddr_t next_bucket, eva; |
3454 | u_int mappings; | | 3454 | u_int mappings; |
3455 | struct vm_page *opg; | | 3455 | struct vm_page *opg; |
3456 | | | 3456 | |
3457 | PMAPCOUNT(kenter_unmappings); | | 3457 | PMAPCOUNT(kenter_unmappings); |
3458 | | | 3458 | |
3459 | NPDEBUG(PDB_KREMOVE, printf("pmap_kremove: va 0x%08lx, len 0x%08lx\n", | | 3459 | NPDEBUG(PDB_KREMOVE, printf("pmap_kremove: va 0x%08lx, len 0x%08lx\n", |
3460 | va, len)); | | 3460 | va, len)); |
3461 | | | 3461 | |
3462 | eva = va + len; | | 3462 | eva = va + len; |
3463 | | | 3463 | |
3464 | while (va < eva) { | | 3464 | while (va < eva) { |
3465 | next_bucket = L2_NEXT_BUCKET(va); | | 3465 | next_bucket = L2_NEXT_BUCKET(va); |
3466 | if (next_bucket > eva) | | 3466 | if (next_bucket > eva) |
3467 | next_bucket = eva; | | 3467 | next_bucket = eva; |
3468 | | | 3468 | |
3469 | l2b = pmap_get_l2_bucket(pmap_kernel(), va); | | 3469 | l2b = pmap_get_l2_bucket(pmap_kernel(), va); |
3470 | KDASSERT(l2b != NULL); | | 3470 | KDASSERT(l2b != NULL); |
3471 | | | 3471 | |
3472 | sptep = ptep = &l2b->l2b_kva[l2pte_index(va)]; | | 3472 | sptep = ptep = &l2b->l2b_kva[l2pte_index(va)]; |
3473 | mappings = 0; | | 3473 | mappings = 0; |
3474 | | | 3474 | |
3475 | while (va < next_bucket) { | | 3475 | while (va < next_bucket) { |
3476 | opte = *ptep; | | 3476 | opte = *ptep; |
3477 | opg = PHYS_TO_VM_PAGE(l2pte_pa(opte)); | | 3477 | opg = PHYS_TO_VM_PAGE(l2pte_pa(opte)); |
3478 | if (opg) { | | 3478 | if (opg) { |
3479 | struct vm_page_md *omd = VM_PAGE_TO_MD(opg); | | 3479 | struct vm_page_md *omd = VM_PAGE_TO_MD(opg); |
3480 | | | 3480 | |
3481 | if (omd->pvh_attrs & PVF_KMPAGE) { | | 3481 | if (omd->pvh_attrs & PVF_KMPAGE) { |
3482 | simple_lock(&omd->pvh_slock); | | 3482 | simple_lock(&omd->pvh_slock); |
3483 | KASSERT(omd->urw_mappings == 0); | | 3483 | KASSERT(omd->urw_mappings == 0); |
3484 | KASSERT(omd->uro_mappings == 0); | | 3484 | KASSERT(omd->uro_mappings == 0); |
3485 | KASSERT(omd->krw_mappings == 0); | | 3485 | KASSERT(omd->krw_mappings == 0); |
3486 | KASSERT(omd->kro_mappings == 0); | | 3486 | KASSERT(omd->kro_mappings == 0); |
3487 | omd->pvh_attrs &= ~PVF_KMPAGE; | | 3487 | omd->pvh_attrs &= ~PVF_KMPAGE; |
3488 | #ifdef PMAP_CACHE_VIPT | | 3488 | #ifdef PMAP_CACHE_VIPT |
3489 | omd->pvh_attrs &= ~PVF_WRITE; | | 3489 | omd->pvh_attrs &= ~PVF_WRITE; |
3490 | #endif | | 3490 | #endif |
3491 | pmap_kmpages--; | | 3491 | pmap_kmpages--; |
3492 | simple_unlock(&omd->pvh_slock); | | 3492 | simple_unlock(&omd->pvh_slock); |
3493 | #ifdef PMAP_CACHE_VIPT | | 3493 | #ifdef PMAP_CACHE_VIPT |
3494 | } else { | | 3494 | } else { |
3495 | pool_put(&pmap_pv_pool, | | 3495 | pool_put(&pmap_pv_pool, |
3496 | pmap_kremove_pg(opg, va)); | | 3496 | pmap_kremove_pg(opg, va)); |
3497 | #endif | | 3497 | #endif |
3498 | } | | 3498 | } |
3499 | } | | 3499 | } |
3500 | if (l2pte_valid(opte)) { | | 3500 | if (l2pte_valid(opte)) { |
3501 | #ifdef PMAP_CACHE_VIVT | | 3501 | #ifdef PMAP_CACHE_VIVT |
3502 | cpu_dcache_wbinv_range(va, PAGE_SIZE); | | 3502 | cpu_dcache_wbinv_range(va, PAGE_SIZE); |
3503 | #endif | | 3503 | #endif |
3504 | cpu_tlb_flushD_SE(va); | | 3504 | cpu_tlb_flushD_SE(va); |
3505 | } | | 3505 | } |
3506 | if (opte) { | | 3506 | if (opte) { |
3507 | *ptep = 0; | | 3507 | *ptep = 0; |
3508 | mappings++; | | 3508 | mappings++; |
3509 | } | | 3509 | } |
3510 | va += PAGE_SIZE; | | 3510 | va += PAGE_SIZE; |
3511 | ptep++; | | 3511 | ptep++; |
3512 | } | | 3512 | } |
3513 | KDASSERT(mappings <= l2b->l2b_occupancy); | | 3513 | KDASSERT(mappings <= l2b->l2b_occupancy); |
3514 | l2b->l2b_occupancy -= mappings; | | 3514 | l2b->l2b_occupancy -= mappings; |
3515 | PTE_SYNC_RANGE(sptep, (u_int)(ptep - sptep)); | | 3515 | PTE_SYNC_RANGE(sptep, (u_int)(ptep - sptep)); |
3516 | } | | 3516 | } |
3517 | cpu_cpwait(); | | 3517 | cpu_cpwait(); |
3518 | } | | 3518 | } |
3519 | | | 3519 | |
3520 | bool | | 3520 | bool |
3521 | pmap_extract(pmap_t pm, vaddr_t va, paddr_t *pap) | | 3521 | pmap_extract(pmap_t pm, vaddr_t va, paddr_t *pap) |
3522 | { | | 3522 | { |
3523 | struct l2_dtable *l2; | | 3523 | struct l2_dtable *l2; |
3524 | pd_entry_t *pl1pd, l1pd; | | 3524 | pd_entry_t *pl1pd, l1pd; |
3525 | pt_entry_t *ptep, pte; | | 3525 | pt_entry_t *ptep, pte; |
3526 | paddr_t pa; | | 3526 | paddr_t pa; |
3527 | u_int l1idx; | | 3527 | u_int l1idx; |
3528 | | | 3528 | |
3529 | pmap_acquire_pmap_lock(pm); | | 3529 | pmap_acquire_pmap_lock(pm); |
3530 | | | 3530 | |
3531 | l1idx = L1_IDX(va); | | 3531 | l1idx = L1_IDX(va); |
3532 | pl1pd = &pm->pm_l1->l1_kva[l1idx]; | | 3532 | pl1pd = &pm->pm_l1->l1_kva[l1idx]; |
3533 | l1pd = *pl1pd; | | 3533 | l1pd = *pl1pd; |
3534 | | | 3534 | |
3535 | if (l1pte_section_p(l1pd)) { | | 3535 | if (l1pte_section_p(l1pd)) { |
3536 | /* | | 3536 | /* |
3537 | * These should only happen for pmap_kernel() | | 3537 | * These should only happen for pmap_kernel() |
3538 | */ | | 3538 | */ |
3539 | KDASSERT(pm == pmap_kernel()); | | 3539 | KDASSERT(pm == pmap_kernel()); |
3540 | pmap_release_pmap_lock(pm); | | 3540 | pmap_release_pmap_lock(pm); |
3541 | pa = (l1pd & L1_S_FRAME) | (va & L1_S_OFFSET); | | 3541 | pa = (l1pd & L1_S_FRAME) | (va & L1_S_OFFSET); |
3542 | } else { | | 3542 | } else { |
3543 | /* | | 3543 | /* |
3544 | * Note that we can't rely on the validity of the L1 | | 3544 | * Note that we can't rely on the validity of the L1 |
3545 | * descriptor as an indication that a mapping exists. | | 3545 | * descriptor as an indication that a mapping exists. |
3546 | * We have to look it up in the L2 dtable. | | 3546 | * We have to look it up in the L2 dtable. |
3547 | */ | | 3547 | */ |
3548 | l2 = pm->pm_l2[L2_IDX(l1idx)]; | | 3548 | l2 = pm->pm_l2[L2_IDX(l1idx)]; |
3549 | | | 3549 | |
3550 | if (l2 == NULL || | | 3550 | if (l2 == NULL || |
3551 | (ptep = l2->l2_bucket[L2_BUCKET(l1idx)].l2b_kva) == NULL) { | | 3551 | (ptep = l2->l2_bucket[L2_BUCKET(l1idx)].l2b_kva) == NULL) { |
3552 | pmap_release_pmap_lock(pm); | | 3552 | pmap_release_pmap_lock(pm); |
3553 | return false; | | 3553 | return false; |
3554 | } | | 3554 | } |
3555 | | | 3555 | |
3556 | ptep = &ptep[l2pte_index(va)]; | | 3556 | ptep = &ptep[l2pte_index(va)]; |
3557 | pte = *ptep; | | 3557 | pte = *ptep; |
3558 | pmap_release_pmap_lock(pm); | | 3558 | pmap_release_pmap_lock(pm); |
3559 | | | 3559 | |
3560 | if (pte == 0) | | 3560 | if (pte == 0) |
3561 | return false; | | 3561 | return false; |
3562 | | | 3562 | |
3563 | switch (pte & L2_TYPE_MASK) { | | 3563 | switch (pte & L2_TYPE_MASK) { |
3564 | case L2_TYPE_L: | | 3564 | case L2_TYPE_L: |
3565 | pa = (pte & L2_L_FRAME) | (va & L2_L_OFFSET); | | 3565 | pa = (pte & L2_L_FRAME) | (va & L2_L_OFFSET); |
3566 | break; | | 3566 | break; |
3567 | | | 3567 | |
3568 | default: | | 3568 | default: |
3569 | pa = (pte & L2_S_FRAME) | (va & L2_S_OFFSET); | | 3569 | pa = (pte & L2_S_FRAME) | (va & L2_S_OFFSET); |
3570 | break; | | 3570 | break; |
3571 | } | | 3571 | } |
3572 | } | | 3572 | } |
3573 | | | 3573 | |
3574 | if (pap != NULL) | | 3574 | if (pap != NULL) |
3575 | *pap = pa; | | 3575 | *pap = pa; |
3576 | | | 3576 | |
3577 | return true; | | 3577 | return true; |
3578 | } | | 3578 | } |
3579 | | | 3579 | |