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| Rev | Author | Line No. | Line |
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| 1 | jermar | 1 | /* |
| 2 | * Copyright (C) 2001-2004 Jakub Jermar |
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| 3 | * All rights reserved. |
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| 4 | * |
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| 5 | * Redistribution and use in source and binary forms, with or without |
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| 6 | * modification, are permitted provided that the following conditions |
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| 7 | * are met: |
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| 8 | * |
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| 9 | * - Redistributions of source code must retain the above copyright |
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| 10 | * notice, this list of conditions and the following disclaimer. |
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| 11 | * - Redistributions in binary form must reproduce the above copyright |
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| 12 | * notice, this list of conditions and the following disclaimer in the |
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| 13 | * documentation and/or other materials provided with the distribution. |
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| 14 | * - The name of the author may not be used to endorse or promote products |
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| 15 | * derived from this software without specific prior written permission. |
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| 16 | * |
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| 17 | * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR |
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| 18 | * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES |
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| 19 | * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. |
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| 20 | * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, |
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| 21 | * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT |
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| 22 | * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
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| 23 | * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
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| 24 | * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
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| 25 | * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF |
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| 26 | * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
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| 27 | */ |
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| 28 | |||
| 29 | #include <mm/tlb.h> |
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| 7 | jermar | 30 | #include <smp/ipi.h> |
| 5 | jermar | 31 | #include <synch/spinlock.h> |
| 32 | #include <typedefs.h> |
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| 11 | jermar | 33 | #include <arch/smp/atomic.h> |
| 7 | jermar | 34 | #include <arch/interrupt.h> |
| 5 | jermar | 35 | #include <config.h> |
| 31 | jermar | 36 | #include <arch.h> |
| 1 | jermar | 37 | |
| 5 | jermar | 38 | #ifdef __SMP__ |
| 39 | static spinlock_t tlblock; |
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| 40 | |||
| 41 | void tlb_init(void) |
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| 1 | jermar | 42 | { |
| 5 | jermar | 43 | spinlock_initialize(&tlblock); |
| 1 | jermar | 44 | } |
| 5 | jermar | 45 | |
| 46 | /* must be called with interrupts disabled */ |
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| 6 | jermar | 47 | void tlb_shootdown_start(void) |
| 5 | jermar | 48 | { |
| 31 | jermar | 49 | int i; |
| 50 | |||
| 51 | CPU->tlb_active = 0; |
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| 5 | jermar | 52 | spinlock_lock(&tlblock); |
| 6 | jermar | 53 | tlb_shootdown_ipi_send(); |
| 31 | jermar | 54 | tlb_invalidate(0); /* TODO: use valid ASID */ |
| 5 | jermar | 55 | |
| 31 | jermar | 56 | busy_wait: |
| 57 | for (i = 0; i<config.cpu_active; i++) |
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| 58 | if (cpus[i].tlb_active) |
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| 59 | goto busy_wait; |
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| 5 | jermar | 60 | } |
| 61 | |||
| 6 | jermar | 62 | void tlb_shootdown_finalize(void) |
| 5 | jermar | 63 | { |
| 64 | spinlock_unlock(&tlblock); |
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| 31 | jermar | 65 | CPU->tlb_active = 1; |
| 5 | jermar | 66 | } |
| 67 | |||
| 7 | jermar | 68 | void tlb_shootdown_ipi_send(void) |
| 69 | { |
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| 70 | ipi_broadcast(VECTOR_TLB_SHOOTDOWN_IPI); |
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| 71 | } |
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| 72 | |||
| 6 | jermar | 73 | void tlb_shootdown_ipi_recv(void) |
| 5 | jermar | 74 | { |
| 31 | jermar | 75 | CPU->tlb_active = 0; |
| 5 | jermar | 76 | spinlock_lock(&tlblock); |
| 77 | spinlock_unlock(&tlblock); |
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| 78 | tlb_invalidate(0); /* TODO: use valid ASID */ |
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| 31 | jermar | 79 | CPU->tlb_active = 1; |
| 5 | jermar | 80 | } |
| 81 | #endif /* __SMP__ */ |