| @@ -1,136 +1,136 @@ | | | @@ -1,136 +1,136 @@ |
1 | /* $NetBSD: intr.c,v 1.8 2011/09/16 16:25:44 reinoud Exp $ */ | | 1 | /* $NetBSD: intr.c,v 1.9 2011/12/13 12:27:06 reinoud Exp $ */ |
2 | | | 2 | |
3 | /*- | | 3 | /*- |
4 | * Copyright (c) 2011 Jared D. McNeill <jmcneill@invisible.ca> | | 4 | * Copyright (c) 2011 Jared D. McNeill <jmcneill@invisible.ca> |
5 | * All rights reserved. | | 5 | * All rights reserved. |
6 | * | | 6 | * |
7 | * Redistribution and use in source and binary forms, with or without | | 7 | * Redistribution and use in source and binary forms, with or without |
8 | * modification, are permitted provided that the following conditions | | 8 | * modification, are permitted provided that the following conditions |
9 | * are met: | | 9 | * are met: |
10 | * 1. Redistributions of source code must retain the above copyright | | 10 | * 1. Redistributions of source code must retain the above copyright |
11 | * notice, this list of conditions and the following disclaimer. | | 11 | * notice, this list of conditions and the following disclaimer. |
12 | * 2. Redistributions in binary form must reproduce the above copyright | | 12 | * 2. Redistributions in binary form must reproduce the above copyright |
13 | * notice, this list of conditions and the following disclaimer in the | | 13 | * notice, this list of conditions and the following disclaimer in the |
14 | * documentation and/or other materials provided with the distribution. | | 14 | * documentation and/or other materials provided with the distribution. |
15 | * | | 15 | * |
16 | * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS | | 16 | * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS |
17 | * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED | | 17 | * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED |
18 | * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR | | 18 | * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR |
19 | * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS | | 19 | * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS |
20 | * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR | | 20 | * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR |
21 | * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF | | 21 | * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF |
22 | * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS | | 22 | * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS |
23 | * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN | | 23 | * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN |
24 | * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) | | 24 | * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) |
25 | * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE | | 25 | * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE |
26 | * POSSIBILITY OF SUCH DAMAGE. | | 26 | * POSSIBILITY OF SUCH DAMAGE. |
27 | */ | | 27 | */ |
28 | | | 28 | |
29 | #include <sys/cdefs.h> | | 29 | #include <sys/cdefs.h> |
30 | __KERNEL_RCSID(0, "$NetBSD: intr.c,v 1.8 2011/09/16 16:25:44 reinoud Exp $"); | | 30 | __KERNEL_RCSID(0, "$NetBSD: intr.c,v 1.9 2011/12/13 12:27:06 reinoud Exp $"); |
31 | | | 31 | |
32 | #include <sys/types.h> | | 32 | #include <sys/types.h> |
33 | | | 33 | |
34 | #include <machine/intr.h> | | 34 | #include <machine/intr.h> |
35 | #include <machine/thunk.h> | | 35 | #include <machine/thunk.h> |
36 | | | 36 | |
37 | //#define INTR_USE_SIGPROCMASK | | 37 | //#define INTR_USE_SIGPROCMASK |
38 | | | 38 | |
39 | #define MAX_QUEUED_EVENTS 128 | | 39 | #define MAX_QUEUED_EVENTS 128 |
40 | | | 40 | |
41 | static int usermode_x = IPL_NONE; | | 41 | static int usermode_x = IPL_NONE; |
42 | | | 42 | |
43 | #ifdef INTR_USE_SIGPROCMASK | | 43 | #ifdef INTR_USE_SIGPROCMASK |
44 | static bool block_sigalrm = false; | | 44 | static bool block_sigalrm = false; |
45 | #endif | | 45 | #endif |
46 | | | 46 | |
47 | | | 47 | |
48 | struct spl_intr_event { | | 48 | struct spl_intr_event { |
49 | void (*func)(void *); | | 49 | void (*func)(void *); |
50 | void *arg; | | 50 | void *arg; |
51 | }; | | 51 | }; |
52 | | | 52 | |
53 | struct spl_intr_event spl_intrs[IPL_HIGH+1][MAX_QUEUED_EVENTS]; | | 53 | struct spl_intr_event spl_intrs[IPL_HIGH+1][MAX_QUEUED_EVENTS]; |
54 | int spl_intr_wr[IPL_HIGH+1]; | | 54 | int spl_intr_wr[IPL_HIGH+1]; |
55 | int spl_intr_rd[IPL_HIGH+1]; | | 55 | int spl_intr_rd[IPL_HIGH+1]; |
56 | | | 56 | |
57 | void | | 57 | void |
58 | splinit(void) | | 58 | splinit(void) |
59 | { | | 59 | { |
60 | int i; | | 60 | int i; |
61 | for (i = 0; i <= IPL_HIGH; i++) { | | 61 | for (i = 0; i <= IPL_HIGH; i++) { |
62 | spl_intr_rd[i] = 1; | | 62 | spl_intr_rd[i] = 1; |
63 | spl_intr_wr[i] = 1; | | 63 | spl_intr_wr[i] = 1; |
64 | } | | 64 | } |
65 | } | | 65 | } |
66 | | | 66 | |
67 | void | | 67 | void |
68 | spl_intr(int x, void (*func)(void *), void *arg) | | 68 | spl_intr(int x, void (*func)(void *), void *arg) |
69 | { | | 69 | { |
70 | struct spl_intr_event *spli; | | 70 | struct spl_intr_event *spli; |
71 | | | 71 | |
72 | if (x >= usermode_x) { | | 72 | if (x >= usermode_x) { |
73 | func(arg); | | 73 | func(arg); |
74 | return; | | 74 | return; |
75 | } | | 75 | } |
76 | | | 76 | |
77 | dprintf_debug("spl_intr: queue %d when %d\n", x, usermode_x); | | 77 | // dprintf_debug("spl_intr: queue %d when %d\n", x, usermode_x); |
78 | spli = &spl_intrs[x][spl_intr_wr[x]]; | | 78 | spli = &spl_intrs[x][spl_intr_wr[x]]; |
79 | spli->func = func; | | 79 | spli->func = func; |
80 | spli->arg = arg; | | 80 | spli->arg = arg; |
81 | | | 81 | |
82 | spl_intr_wr[x] = (spl_intr_wr[x] + 1) % MAX_QUEUED_EVENTS; | | 82 | spl_intr_wr[x] = (spl_intr_wr[x] + 1) % MAX_QUEUED_EVENTS; |
83 | if (spl_intr_wr[x] == spl_intr_rd[x]) | | 83 | if (spl_intr_wr[x] == spl_intr_rd[x]) |
84 | panic("%s: spl list %d full!\n", __func__, x); | | 84 | panic("%s: spl list %d full!\n", __func__, x); |
85 | } | | 85 | } |
86 | | | 86 | |
87 | int | | 87 | int |
88 | splraise(int x) | | 88 | splraise(int x) |
89 | { | | 89 | { |
90 | int oldx = usermode_x; | | 90 | int oldx = usermode_x; |
91 | | | 91 | |
92 | if (x > usermode_x) { | | 92 | if (x > usermode_x) { |
93 | usermode_x = x; | | 93 | usermode_x = x; |
94 | } | | 94 | } |
95 | | | 95 | |
96 | #ifdef INTR_USE_SIGPROCMASK | | 96 | #ifdef INTR_USE_SIGPROCMASK |
97 | if (x >= IPL_SCHED && !block_sigalrm) { | | 97 | if (x >= IPL_SCHED && !block_sigalrm) { |
98 | thunk_sigblock(SIGALRM); | | 98 | thunk_sigblock(SIGALRM); |
99 | block_sigalrm = true; | | 99 | block_sigalrm = true; |
100 | } | | 100 | } |
101 | #endif | | 101 | #endif |
102 | | | 102 | |
103 | return oldx; | | 103 | return oldx; |
104 | } | | 104 | } |
105 | | | 105 | |
106 | void | | 106 | void |
107 | spllower(int x) | | 107 | spllower(int x) |
108 | { | | 108 | { |
109 | struct spl_intr_event *spli; | | 109 | struct spl_intr_event *spli; |
110 | int y; | | 110 | int y; |
111 | | | 111 | |
112 | /* `eat' interrupts that came by until we got back to x */ | | 112 | /* `eat' interrupts that came by until we got back to x */ |
113 | if (usermode_x > x) { | | 113 | if (usermode_x > x) { |
114 | //restart: | | 114 | //restart: |
115 | for (y = usermode_x; y >= x; y--) { | | 115 | for (y = usermode_x; y >= x; y--) { |
116 | while (spl_intr_rd[y] != spl_intr_wr[y]) { | | 116 | while (spl_intr_rd[y] != spl_intr_wr[y]) { |
117 | dprintf_debug("spl y %d firing\n", y); | | 117 | // dprintf_debug("spl y %d firing\n", y); |
118 | spli = &spl_intrs[y][spl_intr_rd[y]]; | | 118 | spli = &spl_intrs[y][spl_intr_rd[y]]; |
119 | if (!spli->func) | | 119 | if (!spli->func) |
120 | panic("%s: spli->func is NULL for ipl %d, rd %d, wr %d\n", | | 120 | panic("%s: spli->func is NULL for ipl %d, rd %d, wr %d\n", |
121 | __func__, y, spl_intr_rd[y], spl_intr_wr[y]); | | 121 | __func__, y, spl_intr_rd[y], spl_intr_wr[y]); |
122 | spli->func(spli->arg); | | 122 | spli->func(spli->arg); |
123 | spl_intr_rd[y] = (spl_intr_rd[y] + 1) % MAX_QUEUED_EVENTS; | | 123 | spl_intr_rd[y] = (spl_intr_rd[y] + 1) % MAX_QUEUED_EVENTS; |
124 | // goto restart; | | 124 | // goto restart; |
125 | } | | 125 | } |
126 | } | | 126 | } |
127 | usermode_x = x; | | 127 | usermode_x = x; |
128 | } | | 128 | } |
129 | | | 129 | |
130 | #ifdef INTR_USE_SIGPROCMASK | | 130 | #ifdef INTR_USE_SIGPROCMASK |
131 | if (x < IPL_SCHED && block_sigalrm) { | | 131 | if (x < IPL_SCHED && block_sigalrm) { |
132 | thunk_sigunblock(SIGALRM); | | 132 | thunk_sigunblock(SIGALRM); |
133 | block_sigalrm = false; | | 133 | block_sigalrm = false; |
134 | } | | 134 | } |
135 | #endif | | 135 | #endif |
136 | } | | 136 | } |