Rev 569 | Rev 623 | Go to most recent revision | Blame | Compare with Previous | Last modification | View Log | Download | RSS feed
/*
* 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>
#include <panic.h>
#ifdef CONFIG_SMP
static spinlock_t tlblock;
#endif
void tlb_init(void)
{
if (config.cpu_active == 1)
spinlock_initialize(&tlblock, "tlb_lock");
tlb_arch_init();
}
#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 */