| 0,0 → 1,98 |
|---|
| /* |
| * Copyright (C) 2006 Jakub Jermar |
| * All rights reserved. |
| * |
| * Redistribution and use in source and binary forms, with or without |
| * modification, are permitted provided that the following conditions |
| * are met: |
| * |
| * - Redistributions of source code must retain the above copyright |
| * notice, this list of conditions and the following disclaimer. |
| * - Redistributions in binary form must reproduce the above copyright |
| * notice, this list of conditions and the following disclaimer in the |
| * documentation and/or other materials provided with the distribution. |
| * - The name of the author may not be used to endorse or promote products |
| * derived from this software without specific prior written permission. |
| * |
| * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR |
| * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES |
| * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. |
| * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, |
| * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT |
| * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
| * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
| * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
| * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF |
| * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
| */ |
| |
| /** @addtogroup sparc64mm |
| * @{ |
| */ |
| /** |
| * @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 */ |
| |
| /** @} |
| */ |
| |