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| 1 | /* |
1 | /* |
| 2 | * Copyright (C) 2001-2004 Jakub Jermar |
2 | * Copyright (C) 2001-2004 Jakub Jermar |
| 3 | * All rights reserved. |
3 | * All rights reserved. |
| 4 | * |
4 | * |
| 5 | * Redistribution and use in source and binary forms, with or without |
5 | * Redistribution and use in source and binary forms, with or without |
| 6 | * modification, are permitted provided that the following conditions |
6 | * modification, are permitted provided that the following conditions |
| 7 | * are met: |
7 | * are met: |
| 8 | * |
8 | * |
| 9 | * - Redistributions of source code must retain the above copyright |
9 | * - Redistributions of source code must retain the above copyright |
| 10 | * notice, this list of conditions and the following disclaimer. |
10 | * notice, this list of conditions and the following disclaimer. |
| 11 | * - Redistributions in binary form must reproduce the above copyright |
11 | * - Redistributions in binary form must reproduce the above copyright |
| 12 | * notice, this list of conditions and the following disclaimer in the |
12 | * notice, this list of conditions and the following disclaimer in the |
| 13 | * documentation and/or other materials provided with the distribution. |
13 | * documentation and/or other materials provided with the distribution. |
| 14 | * - The name of the author may not be used to endorse or promote products |
14 | * - The name of the author may not be used to endorse or promote products |
| 15 | * derived from this software without specific prior written permission. |
15 | * derived from this software without specific prior written permission. |
| 16 | * |
16 | * |
| 17 | * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR |
17 | * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR |
| 18 | * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES |
18 | * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES |
| 19 | * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. |
19 | * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. |
| 20 | * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, |
20 | * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, |
| 21 | * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT |
21 | * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT |
| 22 | * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
22 | * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
| 23 | * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
23 | * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
| 24 | * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
24 | * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
| 25 | * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF |
25 | * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF |
| 26 | * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
26 | * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
| 27 | */ |
27 | */ |
| 28 | 28 | ||
| 29 | #include <mm/tlb.h> |
29 | #include <mm/tlb.h> |
| - | 30 | #include <smp/ipi.h> |
|
| 30 | #include <synch/spinlock.h> |
31 | #include <synch/spinlock.h> |
| 31 | #include <typedefs.h> |
32 | #include <typedefs.h> |
| 32 | #include <arch/atomic.h> |
33 | #include <arch/atomic.h> |
| - | 34 | #include <arch/interrupt.h> |
|
| 33 | #include <config.h> |
35 | #include <config.h> |
| 34 | 36 | ||
| 35 | #ifdef __SMP__ |
37 | #ifdef __SMP__ |
| 36 | static spinlock_t tlblock; |
38 | static spinlock_t tlblock; |
| 37 | static volatile int tlb_shootdown_cnt; |
39 | static volatile int tlb_shootdown_cnt; |
| 38 | 40 | ||
| 39 | void tlb_init(void) |
41 | void tlb_init(void) |
| 40 | { |
42 | { |
| 41 | spinlock_initialize(&tlblock); |
43 | spinlock_initialize(&tlblock); |
| 42 | tlb_shootdown_cnt = 0; |
44 | tlb_shootdown_cnt = 0; |
| 43 | } |
45 | } |
| 44 | 46 | ||
| 45 | /* must be called with interrupts disabled */ |
47 | /* must be called with interrupts disabled */ |
| 46 | void tlb_shootdown_start(void) |
48 | void tlb_shootdown_start(void) |
| 47 | { |
49 | { |
| 48 | spinlock_lock(&tlblock); |
50 | spinlock_lock(&tlblock); |
| 49 | tlb_shootdown_ipi_send(); |
51 | tlb_shootdown_ipi_send(); |
| 50 | 52 | ||
| 51 | while (tlb_shootdown_cnt < config.cpu_active - 1) |
53 | while (tlb_shootdown_cnt < config.cpu_active - 1) |
| 52 | ; |
54 | ; |
| 53 | 55 | ||
| 54 | tlb_shootdown_cnt = 0; |
56 | tlb_shootdown_cnt = 0; |
| 55 | } |
57 | } |
| 56 | 58 | ||
| 57 | void tlb_shootdown_finalize(void) |
59 | void tlb_shootdown_finalize(void) |
| 58 | { |
60 | { |
| 59 | spinlock_unlock(&tlblock); |
61 | spinlock_unlock(&tlblock); |
| 60 | } |
62 | } |
| - | 63 | ||
| - | 64 | void tlb_shootdown_ipi_send(void) |
|
| - | 65 | { |
|
| - | 66 | ipi_broadcast(VECTOR_TLB_SHOOTDOWN_IPI); |
|
| - | 67 | } |
|
| 61 | 68 | ||
| 62 | void tlb_shootdown_ipi_recv(void) |
69 | void tlb_shootdown_ipi_recv(void) |
| 63 | { |
70 | { |
| 64 | atomic_inc((int *) &tlb_shootdown_cnt); |
71 | atomic_inc((int *) &tlb_shootdown_cnt); |
| 65 | spinlock_lock(&tlblock); |
72 | spinlock_lock(&tlblock); |
| 66 | spinlock_unlock(&tlblock); |
73 | spinlock_unlock(&tlblock); |
| 67 | tlb_invalidate(0); /* TODO: use valid ASID */ |
74 | tlb_invalidate(0); /* TODO: use valid ASID */ |
| 68 | } |
75 | } |
| 69 | #endif /* __SMP__ */ |
76 | #endif /* __SMP__ */ |
| 70 | 77 | ||