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/** @addtogroup sparc64mm  
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/** @addtogroup sparc64mm  
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 * @{
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 * @{
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 */
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 */
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/**
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/**
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 * @file
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 * @file
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 * @brief   D-cache shootdown algorithm.
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 */
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 */
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#include <arch/mm/cache.h>
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#include <arch/mm/cache.h>
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#ifdef CONFIG_SMP
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#include <smp/ipi.h>
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#include <arch/interrupt.h>
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#include <synch/spinlock.h>
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#include <arch.h>
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#include <debug.h>
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/**
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 * This spinlock is used by the processors to synchronize during the D-cache
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 * shootdown.
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 */
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SPINLOCK_INITIALIZE(dcachelock);
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/** Initialize the D-cache shootdown sequence.
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 *
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 * Start the shootdown sequence by sending out an IPI and wait until all
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 * processors spin on the dcachelock spinlock.
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 */
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void dcache_shootdown_start(void)
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{
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    int i;
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    CPU->arch.dcache_active = 0;
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    spinlock_lock(&dcachelock);
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    ipi_broadcast(IPI_DCACHE_SHOOTDOWN);   
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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].arch.dcache_active)
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            goto busy_wait;
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}
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/** Finish the D-cache shootdown sequence. */
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void dcache_shootdown_finalize(void)
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{
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    spinlock_unlock(&dcachelock);
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    CPU->arch.dcache_active = 1;
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}
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/** Process the D-cache shootdown IPI. */
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void dcache_shootdown_ipi_recv(void)
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{
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    ASSERT(CPU);
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    CPU->arch.dcache_active = 0;
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    spinlock_lock(&dcachelock);
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    spinlock_unlock(&dcachelock);
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    dcache_flush();
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    CPU->arch.dcache_active = 1;
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}
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#endif /* CONFIG_SMP */
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/** @}
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/** @}
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 */
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 */
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