| 0,0 → 1,87 |
|---|
| /* |
| * Copyright (C) 2001-2004 Jakub Jermar |
| * All rights reserved. |
| * |
| * Redistribution and use in source and binary forms, with or without |
| * modification, are permitted provided that the following conditions |
| * are met: |
| * |
| * - Redistributions of source code must retain the above copyright |
| * notice, this list of conditions and the following disclaimer. |
| * - Redistributions in binary form must reproduce the above copyright |
| * notice, this list of conditions and the following disclaimer in the |
| * documentation and/or other materials provided with the distribution. |
| * - The name of the author may not be used to endorse or promote products |
| * derived from this software without specific prior written permission. |
| * |
| * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR |
| * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES |
| * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. |
| * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, |
| * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT |
| * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
| * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
| * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
| * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF |
| * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
| */ |
| |
| #include <mm/tlb.h> |
| #include <arch/mm/tlb.h> |
| #include <smp/ipi.h> |
| #include <synch/spinlock.h> |
| #include <typedefs.h> |
| #include <arch/atomic.h> |
| #include <arch/interrupt.h> |
| #include <config.h> |
| #include <arch.h> |
| |
| #ifdef CONFIG_SMP |
| static spinlock_t tlblock; |
| #endif |
| |
| void tlb_init(void) |
| { |
| if (config.cpu_active == 1) |
| spinlock_initialize(&tlblock); |
| |
| tlb_init_arch(); |
| } |
| |
| #ifdef CONFIG_SMP |
| /* must be called with interrupts disabled */ |
| void tlb_shootdown_start(void) |
| { |
| int i; |
| |
| CPU->tlb_active = 0; |
| spinlock_lock(&tlblock); |
| tlb_shootdown_ipi_send(); |
| tlb_invalidate(0); /* TODO: use valid ASID */ |
| |
| busy_wait: |
| for (i = 0; i<config.cpu_count; i++) |
| if (cpus[i].tlb_active) |
| goto busy_wait; |
| } |
| |
| void tlb_shootdown_finalize(void) |
| { |
| spinlock_unlock(&tlblock); |
| CPU->tlb_active = 1; |
| } |
| |
| void tlb_shootdown_ipi_send(void) |
| { |
| ipi_broadcast(VECTOR_TLB_SHOOTDOWN_IPI); |
| } |
| |
| void tlb_shootdown_ipi_recv(void) |
| { |
| CPU->tlb_active = 0; |
| spinlock_lock(&tlblock); |
| spinlock_unlock(&tlblock); |
| tlb_invalidate(0); /* TODO: use valid ASID */ |
| CPU->tlb_active = 1; |
| } |
| #endif /* CONFIG_SMP */ |