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