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1 jermar 1 
/*
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 * Copyright (C) 2001-2004 Jakub Jermar
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 * All rights reserved.
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 *
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 * Redistribution and use in source and binary forms, with or without
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 * modification, are permitted provided that the following conditions
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 * are met:
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 *
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 * - Redistributions of source code must retain the above copyright
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 *   notice, this list of conditions and the following disclaimer.
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 * - Redistributions in binary form must reproduce the above copyright
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 *   notice, this list of conditions and the following disclaimer in the
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 *   documentation and/or other materials provided with the distribution.
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 * - The name of the author may not be used to endorse or promote products
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 *   derived from this software without specific prior written permission.
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 *
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 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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 */
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#include <mm/tlb.h>
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#include <arch/mm/tlb.h>
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#include <smp/ipi.h>
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#include <synch/spinlock.h>
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#include <typedefs.h>
111 palkovsky 34 
#include <arch/atomic.h>
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#include <arch/interrupt.h>
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#include <config.h>
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#include <arch.h>
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#include <panic.h>
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SPINLOCK_INITIALIZE(tlblock);
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void tlb_init(void)
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{
569 jermar 44 
    tlb_arch_init();
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}
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458 decky 47 
#ifdef CONFIG_SMP
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/* must be called with interrupts disabled */
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void tlb_shootdown_start(tlb_invalidate_type_t type, asid_t asid, __address page, count_t cnt)
5 jermar 50 
{
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    int i;
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    CPU->tlb_active = 0;
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    spinlock_lock(&tlblock);
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    /*
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     * TODO: assemble shootdown message.
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     */
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    tlb_shootdown_ipi_send();
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    switch (type) {
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        case TLB_INVL_ALL:
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        tlb_invalidate_all();
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        break;
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        case TLB_INVL_ASID:
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        tlb_invalidate_asid(asid);
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        break;
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        case TLB_INVL_PAGES:
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        tlb_invalidate_pages(asid, page, cnt);
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        break;
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        default:
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        panic("unknown tlb_invalidate_type_t value: %d\n", type);
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        break;
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    }
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busy_wait: 
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    for (i = 0; i<config.cpu_count; i++)
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        if (cpus[i].tlb_active)
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            goto busy_wait;
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}
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6 jermar 82 
void tlb_shootdown_finalize(void)
5 jermar 83 
{
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    spinlock_unlock(&tlblock);
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    CPU->tlb_active = 1;
5 jermar 86 
}
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7 jermar 88 
void tlb_shootdown_ipi_send(void)
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{
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    ipi_broadcast(VECTOR_TLB_SHOOTDOWN_IPI);
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}
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6 jermar 93 
void tlb_shootdown_ipi_recv(void)
5 jermar 94 
{
31 jermar 95 
    CPU->tlb_active = 0;
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    spinlock_lock(&tlblock);
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    spinlock_unlock(&tlblock);
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    tlb_invalidate_all();   /* TODO: use valid ASID */
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    CPU->tlb_active = 1;
5 jermar 100 
}
458 decky 101 
#endif /* CONFIG_SMP */