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#include <arch/atomic.h>
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#include <arch/atomic.h>
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#include <config.h>
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#include <config.h>
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#ifdef __SMP__
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#ifdef __SMP__
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static spinlock_t tlblock;
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static spinlock_t tlblock;
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static volatile int tlb_shutdown_cnt;
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static volatile int tlb_shootdown_cnt;
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void tlb_init(void)
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void tlb_init(void)
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{
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{
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    spinlock_initialize(&tlblock);
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    spinlock_initialize(&tlblock);
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    tlb_shutdown_cnt = 0;
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    tlb_shootdown_cnt = 0;
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}
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}
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/* must be called with interrupts disabled */
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/* must be called with interrupts disabled */
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void tlb_shutdown_start(void)
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void tlb_shootdown_start(void)
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{
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{
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    spinlock_lock(&tlblock);
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    spinlock_lock(&tlblock);
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    tlb_shutdown_ipi_send();
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    tlb_shootdown_ipi_send();
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    while (tlb_shutdown_cnt < config.cpu_active - 1)
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    while (tlb_shootdown_cnt < config.cpu_active - 1)
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        ;
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        ;
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    tlb_shutdown_cnt = 0;
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    tlb_shootdown_cnt = 0;
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}
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}
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void tlb_shutdown_finalize(void)
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void tlb_shootdown_finalize(void)
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{
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{
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    spinlock_unlock(&tlblock);
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    spinlock_unlock(&tlblock);
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}
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}
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void tlb_shutdown_ipi_recv(void)
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void tlb_shootdown_ipi_recv(void)
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{
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{
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    atomic_inc((int *) &tlb_shutdown_cnt);
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    atomic_inc((int *) &tlb_shootdown_cnt);
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    spinlock_lock(&tlblock);
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    spinlock_lock(&tlblock);
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    spinlock_unlock(&tlblock);
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    spinlock_unlock(&tlblock);
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    tlb_invalidate(0);  /* TODO: use valid ASID */
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    tlb_invalidate(0);  /* TODO: use valid ASID */
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}
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}
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#endif /* __SMP__ */
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#endif /* __SMP__ */