31,68 → 31,10 |
*/ |
/** |
* @file |
* @brief D-cache shootdown algorithm. |
*/ |
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#include <arch/mm/cache.h> |
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#ifdef CONFIG_SMP |
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#include <smp/ipi.h> |
#include <arch/interrupt.h> |
#include <synch/spinlock.h> |
#include <arch.h> |
#include <debug.h> |
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/** |
* This spinlock is used by the processors to synchronize during the D-cache |
* shootdown. |
*/ |
SPINLOCK_INITIALIZE(dcachelock); |
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/** Initialize the D-cache shootdown sequence. |
* |
* Start the shootdown sequence by sending out an IPI and wait until all |
* processors spin on the dcachelock spinlock. |
*/ |
void dcache_shootdown_start(void) |
{ |
int i; |
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CPU->arch.dcache_active = 0; |
spinlock_lock(&dcachelock); |
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ipi_broadcast(IPI_DCACHE_SHOOTDOWN); |
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busy_wait: |
for (i = 0; i < config.cpu_count; i++) |
if (cpus[i].arch.dcache_active) |
goto busy_wait; |
} |
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/** Finish the D-cache shootdown sequence. */ |
void dcache_shootdown_finalize(void) |
{ |
spinlock_unlock(&dcachelock); |
CPU->arch.dcache_active = 1; |
} |
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/** Process the D-cache shootdown IPI. */ |
void dcache_shootdown_ipi_recv(void) |
{ |
ASSERT(CPU); |
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CPU->arch.dcache_active = 0; |
spinlock_lock(&dcachelock); |
spinlock_unlock(&dcachelock); |
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dcache_flush(); |
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CPU->arch.dcache_active = 1; |
} |
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#endif /* CONFIG_SMP */ |
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/** @} |
*/ |
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