Fri May 28 00:18:27 2021 UTC ()
Update R6000 description.


(simonb)
diff -r1.6 -r1.7 src/sys/arch/mips/README.models
cvs diff -r1.6 -r1.7 src/sys/arch/mips/README.models (switch to unified diff)

--- src/sys/arch/mips/README.models 2020/08/15 05:41:57 1.6
+++ src/sys/arch/mips/README.models 2021/05/28 00:18:27 1.7
@@ -1,289 +1,289 @@ @@ -1,289 +1,289 @@
1# $NetBSD: README.models,v 1.6 2020/08/15 05:41:57 mrg Exp $ 1# $NetBSD: README.models,v 1.7 2021/05/28 00:18:27 simonb Exp $
2 2
3MIPS models and architecture levels 3MIPS models and architecture levels
4----------------------------------- 4-----------------------------------
5 5
6Since this is a complex and confusing topic and there's a shortage of 6Since this is a complex and confusing topic and there's a shortage of
7information (especially, a shortage of reliable information), I'm 7information (especially, a shortage of reliable information), I'm
8creating this document as a reference for people doing MIPS stuff on 8creating this document as a reference for people doing MIPS stuff on
9NetBSD (and elsewhere). 9NetBSD (and elsewhere).
10 10
11Citations appear in []. With luck all important facts have citations. 11Citations appear in []. With luck all important facts have citations.
12 12
13 13
14------------------------------------------------------------ 14------------------------------------------------------------
151. Architecture levels. 151. Architecture levels.
16 16
17These architecture levels exist: 17These architecture levels exist:
18 18
19 32-bit 64-bit 19 32-bit 64-bit
20 20
21 MIPS-I 21 MIPS-I
22 MIPS-II 22 MIPS-II
23 MIPS-III 23 MIPS-III
24 MIPS-IV 24 MIPS-IV
25 MIPS-V 25 MIPS-V
26 MIPS32 MIPS64 26 MIPS32 MIPS64
27 MIPS32r2 MIPS64r2 27 MIPS32r2 MIPS64r2
28 MIPS32r3 MIPS64r3 28 MIPS32r3 MIPS64r3
29 MIPS32r5 MIPS64r5 29 MIPS32r5 MIPS64r5
30 MIPS32r6 MIPS64r6 30 MIPS32r6 MIPS64r6
31 31
32Note that while MIPS32 is a 32-bit subset of MIPS64, each 32Note that while MIPS32 is a 32-bit subset of MIPS64, each
33corresponding pair of MIPS32rN and MIPS64rN are comparable in age and 33corresponding pair of MIPS32rN and MIPS64rN are comparable in age and
34properties. Later revisions (further down the list) are mostly supersets 34properties. Later revisions (further down the list) are mostly supersets
35of earlier revisions, although some exceptions exist. 35of earlier revisions, although some exceptions exist.
36 36
37 37
38------------------------------------------------------------ 38------------------------------------------------------------
392. CPU models. 392. CPU models.
40 40
41For vintage MIPS these are the standard models as of fall 1996 [idt96 41For vintage MIPS these are the standard models as of fall 1996 [idt96
42A-198] and the corresponding architecture levels. (There were many 42A-198] and the corresponding architecture levels. (There were many
43additional models put out by licensees or by the MIPS company itself, 43additional models put out by licensees or by the MIPS company itself,
44which have model numbers with fewer zeros.) 44which have model numbers with fewer zeros.)
45 45
46 R2000 MIPS-I (32-bit) [idt96 1-5] 46 R2000 MIPS-I (32-bit) [idt96 1-5]
47 R3000 MIPS-I (32-bit) [idt96 1-5] 47 R3000 MIPS-I (32-bit) [idt96 1-5]
48 R4000 MIPS-III (64-bit) [idt96 A-197] 48 R4000 MIPS-III (64-bit) [idt96 A-197]
49 R4200 MIPS-III (64-bit) [idt96 A-197] 49 R4200 MIPS-III (64-bit) [idt96 A-197]
50 R4300 MIPS-III (64-bit) [idt96 A-197] 50 R4300 MIPS-III (64-bit) [idt96 A-197]
51 R4400 MIPS-III (64-bit) [idt96 A-197] 51 R4400 MIPS-III (64-bit) [idt96 A-197]
52 R4600 MIPS-III (64-bit) [idt96 A-197] 52 R4600 MIPS-III (64-bit) [idt96 A-197]
53 R5000 MIPS-IV (64-bit) [idt96 1-5] 53 R5000 MIPS-IV (64-bit) [idt96 1-5]
54 R6000 MIPS-II ?? 54 R6000 MIPS-II (32-bit) with 64-bit FPU regs
55 R8000 MIPS-IV (64-bit) [idt96 1-5] 55 R8000 MIPS-IV (64-bit) [idt96 1-5]
56 R10000 MIPS-IV (64-bit) [idt96 1-5] 56 R10000 MIPS-IV (64-bit) [idt96 1-5]
57 R1x000 MIPS-IV (64-bit) 57 R1x000 MIPS-IV (64-bit)
58 58
59For later models than this I currently have no information. 59For later models than this I currently have no information.
60 60
61 61
62------------------------------------------------------------ 62------------------------------------------------------------
633. CPU models present in various systems. 633. CPU models present in various systems.
64 64
65These are the CPU models found in various systems NetBSD does and 65These are the CPU models found in various systems NetBSD does and
66doesn't support. This table also notes endianness; MIPS chips are 66doesn't support. This table also notes endianness; MIPS chips are
67bi-endian but are wired up one way or the other on motherboards. 67bi-endian but are wired up one way or the other on motherboards.
68 68
69 algor (little-endian [buildsh]) 69 algor (little-endian [buildsh])
70 Algorithmics P-4000i ?? 70 Algorithmics P-4000i ??
71 Algorithmics P-4032 ?? 71 Algorithmics P-4032 ??
72 Algorithmics P-5064 ?? 72 Algorithmics P-5064 ??
73 Algorithmics P-6032 ?? 73 Algorithmics P-6032 ??
74 arc (little-endian [buildsh]) 74 arc (little-endian [buildsh])
75 Acer PICA ?? 75 Acer PICA ??
76 MIPS Magnum 4000 ?? 76 MIPS Magnum 4000 ??
77 NEC Image RISCstation ?? 77 NEC Image RISCstation ??
78 NEC Express RISCserver ?? 78 NEC Express RISCserver ??
79 NEC RISCserver 2200 ?? 79 NEC RISCserver 2200 ??
80 NEC RISCstation 2200 ?? 80 NEC RISCstation 2200 ??
81 NEC RISCstation 2250 ?? 81 NEC RISCstation 2250 ??
82 NEC Express5800/230 R4400 PCI presumably R4400 (MIPS-III) 82 NEC Express5800/230 R4400 PCI presumably R4400 (MIPS-III)
83 NEC Express5800/240 R4400 EISA presumably R4400 (MIPS-III) 83 NEC Express5800/240 R4400 EISA presumably R4400 (MIPS-III)
84 DeskStation Tyne ?? 84 DeskStation Tyne ??
85 cobalt (little-endian [buildsh]) 85 cobalt (little-endian [buildsh])
86 Qube ... ?? ?? 86 Qube ... ?? ??
87 RaQ ... ?? ?? 87 RaQ ... ?? ??
88 emips (big-endian [buildsh]) 88 emips (big-endian [buildsh])
89 ... ?? ?? 89 ... ?? ??
90 (see http://research.microsoft.com/en-us/projects/emips/ ) 90 (see http://research.microsoft.com/en-us/projects/emips/ )
91 evbmips 91 evbmips
92 Loongson 2F ( gdium, lemote etc. ) more or less LE MIPS-III with 92 Loongson 2F ( gdium, lemote etc. ) more or less LE MIPS-III with
93 some extensions 93 some extensions
94 xburst ( as in, jz4780, found on CI20 ) LE MIPS32R2 with extensions 94 xburst ( as in, jz4780, found on CI20 ) LE MIPS32R2 with extensions
95 ... ?? ?? (various-endian) 95 ... ?? ?? (various-endian)
96 ews4800mips (big-endian [buildsh]) 96 ews4800mips (big-endian [buildsh])
97 EWS4800/350 ?? 97 EWS4800/350 ??
98 EWS4800/350F ?? 98 EWS4800/350F ??
99 EWS4800/360AD ?? 99 EWS4800/360AD ??
100 EWS4800/360ADII ?? 100 EWS4800/360ADII ??
101 EWS4800/360SX ?? 101 EWS4800/360SX ??
102 EWS4800/360EX ?? 102 EWS4800/360EX ??
103 EWS4800/360 ?? 103 EWS4800/360 ??
104 ... ?? ?? 104 ... ?? ??
105 hpcmips (big-endian [buildsh]) 105 hpcmips (big-endian [buildsh])
106 see http://wiki.netbsd.org/ports/hpcmips/processor_comparison/ 106 see http://wiki.netbsd.org/ports/hpcmips/processor_comparison/
107 mipsco (big-endian [buildsh]) 107 mipsco (big-endian [buildsh])
108 Various MIPS Computer Systems, Inc. see [mipscolist]  108 Various MIPS Computer Systems, Inc. see [mipscolist]
109 Bull DPX/Prostation M-20 ?? 109 Bull DPX/Prostation M-20 ??
110 newsmips (big-endian [buildsh]) 110 newsmips (big-endian [buildsh])
111 NWS-3470D R3000 (MIPS-I) [portpage] 111 NWS-3470D R3000 (MIPS-I) [portpage]
112 NWS-3410 R3000 (MIPS-I) [portpage] 112 NWS-3410 R3000 (MIPS-I) [portpage]
113 NWS-3460 R3000 (MIPS-I) [portpage] 113 NWS-3460 R3000 (MIPS-I) [portpage]
114 NWS-3710 R3000 (MIPS-I) [portpage] 114 NWS-3710 R3000 (MIPS-I) [portpage]
115 NWS-3720 R3000 (MIPS-I) [portpage] 115 NWS-3720 R3000 (MIPS-I) [portpage]
116 NWS-3800 series ?? 116 NWS-3800 series ??
117 NWS-4000 series R4600 (MIPS-III) [portpage] 117 NWS-4000 series R4600 (MIPS-III) [portpage]
118 NWS-5000 R4[04]00 (MIPS-III) [portpage] 118 NWS-5000 R4[04]00 (MIPS-III) [portpage]
119 playstation2 (little-endian [buildsh]) 119 playstation2 (little-endian [buildsh])
120 playstation2 R5900 120 playstation2 R5900
121 (almost all of MIPS-III + movn/movz) [linux-mips wiki R5900] 121 (almost all of MIPS-III + movn/movz) [linux-mips wiki R5900]
122 pmax (little-endian [buildsh]) 122 pmax (little-endian [buildsh])
123 DECstation/system 2100 and 3100 R2000 (MIPS-I) [portpage] 123 DECstation/system 2100 and 3100 R2000 (MIPS-I) [portpage]
124 DECsystem 5100 R3000 (MIPS-I) [portpage] 124 DECsystem 5100 R3000 (MIPS-I) [portpage]
125 Personal DECstation 5000/20, /25, /33 R3000 (MIPS-I) [portpage] 125 Personal DECstation 5000/20, /25, /33 R3000 (MIPS-I) [portpage]
126 Personal DECstation 5000/50 R4000 (MIPS-III) [portpage] 126 Personal DECstation 5000/50 R4000 (MIPS-III) [portpage]
127 DECstation/system 5000/120, /125, /133 R3000 (MIPS-I) [portpage] 127 DECstation/system 5000/120, /125, /133 R3000 (MIPS-I) [portpage]
128 DECstation/system 5000/150 R4000 (MIPS-III) [portpage] 128 DECstation/system 5000/150 R4000 (MIPS-III) [portpage]
129 DECstation/system 5000/200 R3000 (MIPS-I) [portpage] 129 DECstation/system 5000/200 R3000 (MIPS-I) [portpage]
130 DECstation/system 5000/240 R3000 (MIPS-I) [portpage] 130 DECstation/system 5000/240 R3000 (MIPS-I) [portpage]
131 DECstation/system 5000/260 R4400 (MIPS-III) [portpage] 131 DECstation/system 5000/260 R4400 (MIPS-III) [portpage]
132 DECsystem 5900 R3000 (MIPS-I) [portpage] 132 DECsystem 5900 R3000 (MIPS-I) [portpage]
133 DECsystem 5900-260 R4400 (MIPS-III) [portpage] 133 DECsystem 5900-260 R4400 (MIPS-III) [portpage]
134 DECsystem 5500 R3000 (MIPS-I) [portpage] 134 DECsystem 5500 R3000 (MIPS-I) [portpage]
135 sbmips 135 sbmips
136 BCM91250A (Swarm) evaluation board Broadcomm BCM1250 [portpage] 136 BCM91250A (Swarm) evaluation board Broadcomm BCM1250 [portpage]
137 sgimips (big-endian [buildsh]) 137 sgimips (big-endian [buildsh])
138 4D/20 ?? 138 4D/20 ??
139 4D/25 ?? 139 4D/25 ??
140 Indigo R3000 (MIPS-I) [portpage] 140 Indigo R3000 (MIPS-I) [portpage]
141 Indigo (R4x00) R4?00 (MIPS-III) [portpage] 141 Indigo (R4x00) R4?00 (MIPS-III) [portpage]
142 4D/30 ?? 142 4D/30 ??
143 4D/35 ?? 143 4D/35 ??
144 Indigo2 (R4x00) R4?00 (MIPS-III) [portpage] 144 Indigo2 (R4x00) R4?00 (MIPS-III) [portpage]
145 Challenge M ?? 145 Challenge M ??
146 Indy (R4x00) R4?00 (MIPS-III) [portpage] 146 Indy (R4x00) R4?00 (MIPS-III) [portpage]
147 Indy (R5000) R5000 (MIPS-IV) [portpage] 147 Indy (R5000) R5000 (MIPS-IV) [portpage]
148 Challenge S (R4x00) R4?00 (MIPS-III) [portpage] 148 Challenge S (R4x00) R4?00 (MIPS-III) [portpage]
149 Challenge S (R5000) R5000 (MIPS-IV) [portpage] 149 Challenge S (R5000) R5000 (MIPS-IV) [portpage]
150 R10000 Power Indigo2 R10000 (MIPS-IV) [portpage] 150 R10000 Power Indigo2 R10000 (MIPS-IV) [portpage]
151 Octane R1x000 (MIPS-IV) [portpage] 151 Octane R1x000 (MIPS-IV) [portpage]
152 O2 (R5000) R5000 (MIPS-IV) [portpage] 152 O2 (R5000) R5000 (MIPS-IV) [portpage]
153 O2 (RM5200) RM5200 (MIPS-IV) [portpage] 153 O2 (RM5200) RM5200 (MIPS-IV) [portpage]
154 O2 (R7000) R7000 (MIPS-IV) [portpage] 154 O2 (R7000) R7000 (MIPS-IV) [portpage]
155 O2 (R10000) R10000 (MIPS-IV) [portpage] 155 O2 (R10000) R10000 (MIPS-IV) [portpage]
156 O2 (R12000) R12000 (MIPS-IV) [portpage] 156 O2 (R12000) R12000 (MIPS-IV) [portpage]
157 O2 (R14000) R14000 (MIPS-IV) [portpage] 157 O2 (R14000) R14000 (MIPS-IV) [portpage]
158 Fuel R1x000 (MIPS-IV) [portpage] 158 Fuel R1x000 (MIPS-IV) [portpage]
159 Tezro R1x000 (MIPS-IV) [portpage] 159 Tezro R1x000 (MIPS-IV) [portpage]
160 ... ?? 160 ... ??
161 161
162 162
163------------------------------------------------------------ 163------------------------------------------------------------
1644. FPU properties 1644. FPU properties
165 165
166TBD... this is complex and messy (XXX / ??) 166TBD... this is complex and messy (XXX / ??)
167 167
168 168
169------------------------------------------------------------ 169------------------------------------------------------------
1705. Exception handling properties 1705. Exception handling properties
171 171
172TBD... (XXX / ??) 172TBD... (XXX / ??)
173 173
174 174
175------------------------------------------------------------ 175------------------------------------------------------------
1766. MMU properties 1766. MMU properties
177 177
178TBD... (XXX / ??) 178TBD... (XXX / ??)
179 179
180 180
181------------------------------------------------------------ 181------------------------------------------------------------
1827. Cache properties 1827. Cache properties
183 183
184TBD... (XXX / ??) 184TBD... (XXX / ??)
185 185
186 186
187------------------------------------------------------------ 187------------------------------------------------------------
1888. Instruction ordering properties and hazards 1888. Instruction ordering properties and hazards
189 189
190TBD... (XXX / ??) 190TBD... (XXX / ??)
191 191
192In the absence of the SYNC instruction before MIPS-II [idt96 A-172, 192In the absence of the SYNC instruction before MIPS-II [idt96 A-172,
193mips32insn 215], apparently on a R3000 you can force pending memory 193mips32insn 215], apparently on a R3000 you can force pending memory
194writes to complete by doing an uncached read. [idt96 11-13] 194writes to complete by doing an uncached read. [idt96 11-13]
195 195
196Apparently also on some models but not others the state of the write 196Apparently also on some models but not others the state of the write
197buffer is wired to the coprocessor 0 condition bit and you can also do 197buffer is wired to the coprocessor 0 condition bit and you can also do
198this by using the otherwise useless bc0f instruction (branch on 198this by using the otherwise useless bc0f instruction (branch on
199coprocessor 0 false) to loop. [no citation, I found this in passing 199coprocessor 0 false) to loop. [no citation, I found this in passing
200the other day with Google while looking for something else] 200the other day with Google while looking for something else]
201 201
202 202
203------------------------------------------------------------ 203------------------------------------------------------------
2049. Pipeline hazards 2049. Pipeline hazards
205 205
206TBD... (XXX / ??) 206TBD... (XXX / ??)
207 207
208On MIPS-I a load instruction requires an explicit one-cycle wait 208On MIPS-I a load instruction requires an explicit one-cycle wait
209before using the result. This restriction was lifted in MIPS-II, 209before using the result. This restriction was lifted in MIPS-II,
210with the addition of an interlock in the pipeline. [idt96 A-2] 210with the addition of an interlock in the pipeline. [idt96 A-2]
211 211
212A multiply should not be started within two cycles of a MFHI or MFLO 212A multiply should not be started within two cycles of a MFHI or MFLO
213instruction, as an interrupt that requires restarting the MFHI or MFLO 213instruction, as an interrupt that requires restarting the MFHI or MFLO
214might (will) get the result from the subsequent multiply. At least on 214might (will) get the result from the subsequent multiply. At least on
215MIPS-I. [idt96 2-4] I guess this is true for divides as well. 215MIPS-I. [idt96 2-4] I guess this is true for divides as well.
216 216
217 217
218------------------------------------------------------------ 218------------------------------------------------------------
21910. Coprocessor 0 hazards 21910. Coprocessor 0 hazards
220 220
221TBD... (XXX / ??) 221TBD... (XXX / ??)
222 222
223 223
224---------------------------------------------------------------------- 224----------------------------------------------------------------------
22511. Deprecated/removed material. 22511. Deprecated/removed material.
226 226
227When the exception handling model was changed for MIPS-III 227When the exception handling model was changed for MIPS-III
228(introducing the ERET instruction) the RFE instruction supporting the 228(introducing the ERET instruction) the RFE instruction supporting the
229old model was removed. [idt96 A-134] 229old model was removed. [idt96 A-134]
230 230
231Coprocessor 3 (that is, the ability to have a third coprocessor, which 231Coprocessor 3 (that is, the ability to have a third coprocessor, which
232had never been used for anything) was removed in MIPS-III [idt96 A-197]. 232had never been used for anything) was removed in MIPS-III [idt96 A-197].
233 233
234The branch likely instructions (e.g. BEQL) were added in MIPS-II 234The branch likely instructions (e.g. BEQL) were added in MIPS-II
235[mips32insn 56] and deprecated not long after, at least by MIPS32 235[mips32insn 56] and deprecated not long after, at least by MIPS32
236[mips32insn 57] and were removed in release MIPS32 Release 6 236[mips32insn 57] and were removed in release MIPS32 Release 6
237[mips32newinsn2a 71]. 237[mips32newinsn2a 71].
238 238
239SSNOP as a special NOP was deprecated in MIPS32/64 Release 6 239SSNOP as a special NOP was deprecated in MIPS32/64 Release 6
240[mips32newinsn2a 375] and sequences using SSNOP should include the 240[mips32newinsn2a 375] and sequences using SSNOP should include the
241new EHB which counts as an SSNOP on older implementations 241new EHB which counts as an SSNOP on older implementations
242[mips32newinsn2a 174] ... and possibly SYNC/SYNCI ??? 242[mips32newinsn2a 174] ... and possibly SYNC/SYNCI ???
243[mips32newinsn2a 394-401] 243[mips32newinsn2a 394-401]
244 244
245... ?? 245... ??
246 246
247------------------------------------------------------------ 247------------------------------------------------------------
24812. Conditional compilation in NetBSD 24812. Conditional compilation in NetBSD
249 249
250TBD... (XXX / ??) 250TBD... (XXX / ??)
251 251
252 252
253------------------------------------------------------------ 253------------------------------------------------------------
254References: 254References:
255 255
256[buildsh] The MACHINE/MACHINE_ARCH architecture table in NetBSD 256[buildsh] The MACHINE/MACHINE_ARCH architecture table in NetBSD
257 build.sh. 257 build.sh.
258 258
259[idt96] "IDT MIPS Microprocessor Family Software Reference Manual", 259[idt96] "IDT MIPS Microprocessor Family Software Reference Manual",
260 Integrated Device Technology, Version 2.0, dated October 1996. 260 Integrated Device Technology, Version 2.0, dated October 1996.
261 261
262[linux-mips wiki] https://www.linux-mips.org/wiki/ 262[linux-mips wiki] https://www.linux-mips.org/wiki/
263 263
264[mips32intro] "MIPS32(TM) Architecture For Programmers Volume I: 264[mips32intro] "MIPS32(TM) Architecture For Programmers Volume I:
265 Introduction to the MIPS32(TM) Architecture", MIPS 265 Introduction to the MIPS32(TM) Architecture", MIPS
266 Technologies, Document Number MD00082, Revision 0.95, dated 266 Technologies, Document Number MD00082, Revision 0.95, dated
267 March 2001. This was apparently an external review version or 267 March 2001. This was apparently an external review version or
268 something and has been available on the Internet; the final 268 something and has been available on the Internet; the final
269 version, and later revisions, never were. (AFAIK) 269 version, and later revisions, never were. (AFAIK)
270 270
271[mips32insn] "MIPS32(TM) Architecture For Programmers Volume II: The 271[mips32insn] "MIPS32(TM) Architecture For Programmers Volume II: The
272 MIPS32(TM) Instruction Set", MIPS Technologies, Document Number 272 MIPS32(TM) Instruction Set", MIPS Technologies, Document Number
273 MD00086, Revision 0.95, March 12, 2001. Ditto. 273 MD00086, Revision 0.95, March 12, 2001. Ditto.
274 274
275[mips32newinsn2a] "MIPS32(R) Architecture For Programmers Volume II-A: 275[mips32newinsn2a] "MIPS32(R) Architecture For Programmers Volume II-A:
276 The MIPS32(R) Instruction Set Manual", Imagination, Document 276 The MIPS32(R) Instruction Set Manual", Imagination, Document
277 Number MD00086, Revision 6.02, dated December 10, 2014. 277 Number MD00086, Revision 6.02, dated December 10, 2014.
278 278
279[mips32priv] "MIPS32(TM) Architecture For Programmers Volume III: The 279[mips32priv] "MIPS32(TM) Architecture For Programmers Volume III: The
280 MIPS32(TM) Privileged Resource Architecture", Document Number 280 MIPS32(TM) Privileged Resource Architecture", Document Number
281 MD00090, Revision 0.95, dated March 2001. Ditto. 281 MD00090, Revision 0.95, dated March 2001. Ditto.
282 282
283[portpage] The port page for this NetBSD port on wiki.netbsd.org, or a 283[portpage] The port page for this NetBSD port on wiki.netbsd.org, or a
284 subpage. Ideally these references should be replaced with 284 subpage. Ideally these references should be replaced with
285 something less self-referential. 285 something less self-referential.
286 286
287[mipscolist] List of MIPS Computer Systems, Inc. machines hosted on the 287[mipscolist] List of MIPS Computer Systems, Inc. machines hosted on the
288 NetBSD web server: https://www.netbsd.org/ports/mipsco/models.html 288 NetBSD web server: https://www.netbsd.org/ports/mipsco/models.html
289 289