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ARM: no need to call cache functions when MMU is disabled 

Without MMU enabled we do not need to call __mmu_cache_* as the
caches are not enabled. Calling flush_icache() before jumping
to new code is enough.

Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
This commit is contained in:
Sascha Hauer 2012-10-12 16:58:22 +02:00
parent 9243875971
commit 3d76ff9aea
1 changed files with 2 additions and 11 deletions
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13
arch/arm/cpu/cpu.c
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@ -30,6 +30,7 @@
#include <asm/memory.h>
#include <asm/system_info.h>
#include <asm/cputype.h>
#include <asm/cache.h>
/**
* Enable processor's instruction cache
@ -74,19 +75,9 @@ int icache_status(void)
void arch_shutdown(void)
{
#ifdef CONFIG_MMU
/* nearly the same as below, but this could also disable
* second level cache.
*/
mmu_disable();
#else
asm volatile (
"bl __mmu_cache_flush;"
"bl __mmu_cache_off;"
:
:
: "r0", "r1", "r2", "r3", "r6", "r10", "r12", "lr", "cc", "memory"
);
#endif
flush_icache();
}
#ifdef CONFIG_THUMB2_BAREBOX