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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 <arch/mm/tlb.h> |
30 | #include <arch/mm/tlb.h> |
31 | #include <smp/ipi.h> |
31 | #include <smp/ipi.h> |
32 | #include <synch/spinlock.h> |
32 | #include <synch/spinlock.h> |
33 | #include <typedefs.h> |
33 | #include <typedefs.h> |
34 | #include <arch/atomic.h> |
34 | #include <arch/atomic.h> |
35 | #include <arch/interrupt.h> |
35 | #include <arch/interrupt.h> |
36 | #include <config.h> |
36 | #include <config.h> |
37 | #include <arch.h> |
37 | #include <arch.h> |
38 | 38 | ||
39 | #ifdef CONFIG_SMP |
39 | #ifdef CONFIG_SMP |
40 | static spinlock_t tlblock; |
40 | static spinlock_t tlblock; |
41 | #endif |
41 | #endif |
42 | 42 | ||
43 | void tlb_init(void) |
43 | void tlb_init(void) |
44 | { |
44 | { |
45 | if (config.cpu_active == 1) |
45 | if (config.cpu_active == 1) |
46 | spinlock_initialize(&tlblock, "tlb_lock"); |
46 | spinlock_initialize(&tlblock, "tlb_lock"); |
47 | 47 | ||
48 | tlb_init_arch(); |
48 | tlb_arch_init(); |
49 | } |
49 | } |
50 | 50 | ||
51 | #ifdef CONFIG_SMP |
51 | #ifdef CONFIG_SMP |
52 | /* must be called with interrupts disabled */ |
52 | /* must be called with interrupts disabled */ |
53 | void tlb_shootdown_start(void) |
53 | void tlb_shootdown_start(void) |
54 | { |
54 | { |
55 | int i; |
55 | int i; |
56 | 56 | ||
57 | CPU->tlb_active = 0; |
57 | CPU->tlb_active = 0; |
58 | spinlock_lock(&tlblock); |
58 | spinlock_lock(&tlblock); |
59 | tlb_shootdown_ipi_send(); |
59 | tlb_shootdown_ipi_send(); |
60 | tlb_invalidate(0); /* TODO: use valid ASID */ |
60 | tlb_invalidate(0); /* TODO: use valid ASID */ |
61 | 61 | ||
62 | busy_wait: |
62 | busy_wait: |
63 | for (i = 0; i<config.cpu_count; i++) |
63 | for (i = 0; i<config.cpu_count; i++) |
64 | if (cpus[i].tlb_active) |
64 | if (cpus[i].tlb_active) |
65 | goto busy_wait; |
65 | goto busy_wait; |
66 | } |
66 | } |
67 | 67 | ||
68 | void tlb_shootdown_finalize(void) |
68 | void tlb_shootdown_finalize(void) |
69 | { |
69 | { |
70 | spinlock_unlock(&tlblock); |
70 | spinlock_unlock(&tlblock); |
71 | CPU->tlb_active = 1; |
71 | CPU->tlb_active = 1; |
72 | } |
72 | } |
73 | 73 | ||
74 | void tlb_shootdown_ipi_send(void) |
74 | void tlb_shootdown_ipi_send(void) |
75 | { |
75 | { |
76 | ipi_broadcast(VECTOR_TLB_SHOOTDOWN_IPI); |
76 | ipi_broadcast(VECTOR_TLB_SHOOTDOWN_IPI); |
77 | } |
77 | } |
78 | 78 | ||
79 | void tlb_shootdown_ipi_recv(void) |
79 | void tlb_shootdown_ipi_recv(void) |
80 | { |
80 | { |
81 | CPU->tlb_active = 0; |
81 | CPU->tlb_active = 0; |
82 | spinlock_lock(&tlblock); |
82 | spinlock_lock(&tlblock); |
83 | spinlock_unlock(&tlblock); |
83 | spinlock_unlock(&tlblock); |
84 | tlb_invalidate(0); /* TODO: use valid ASID */ |
84 | tlb_invalidate(0); /* TODO: use valid ASID */ |
85 | CPU->tlb_active = 1; |
85 | CPU->tlb_active = 1; |
86 | } |
86 | } |
87 | #endif /* CONFIG_SMP */ |
87 | #endif /* CONFIG_SMP */ |
88 | 88 |