Changeset f8ddd17 in mainline for kernel/arch/sparc64/src/mm/cache.c

Timestamp:

2006-12-09T20:20:50Z (19 years ago)

Author:

Jakub Jermar <jakub@…>

Branches:

lfn, master, serial, ticket/834-toolchain-update, topic/msim-upgrade, topic/simplify-dev-export

Children:

b82a13c

Parents:

9ab9c2ec

Message:

Rework support for virtually indexed cache.
Instead of repeatedly flushing the data cache, which was a huge overkill, refuse to create an illegal address alias
in the kernel (again) and allocate appropriate page color in userspace instead. Extend the detection also to
SYS_PHYSMEM_MAP syscall.

Add support for tracking physical memory areas mappable by SYS_PHYSMEM_MAP.

Lots of coding style changes.

File:

• kernel/arch/sparc64/src/mm/cache.c (modified) (1 diff)

kernel/arch/sparc64/src/mm/cache.c

@@ -32 +32 @@
 /**
  * @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 */
-
 /** @}
  */