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ARM1136: MX35: Make asm routines volatile in cache ops

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As well as pushed for ARM926EJS, we certainly don't want
the compiler to reorganise the code for dcache flushing
Fix checkpatch warnings as well.

Signed-off-by: Stefano Babic <sbabic@denx.de>
CC: Marek Vasut <marex@denx.de>
CC: Albert Aribaud <albert.u.boot@aribaud.net>
This commit is contained in:
Stefano Babic 2012-04-09 13:33:04 +02:00 committed by Albert ARIBAUD
parent 38fcc71cc5
commit fbf4a074e0
1 changed files with 12 additions and 10 deletions
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22
arch/arm/cpu/arm1136/cpu.c
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@ -70,10 +70,12 @@ int cleanup_before_linux (void)
static void cache_flush(void)
{
unsigned long i = 0;
asm ("mcr p15, 0, %0, c7, c10, 0": :"r" (i)); /* clean entire data cache */
asm ("mcr p15, 0, %0, c7, c7, 0": :"r" (i)); /* invalidate both caches and flush btb */
asm ("mcr p15, 0, %0, c7, c10, 4": :"r" (i)); /* mem barrier to sync things */
/* clean entire data cache */
asm volatile("mcr p15, 0, %0, c7, c10, 0" : : "r" (i));
/* invalidate both caches and flush btb */
asm volatile("mcr p15, 0, %0, c7, c7, 0" : : "r" (i));
/* mem barrier to sync things */
asm volatile("mcr p15, 0, %0, c7, c10, 4" : : "r" (i));
}
#ifndef CONFIG_SYS_DCACHE_OFF
@ -84,13 +86,13 @@ static void cache_flush(void)
void invalidate_dcache_all(void)
{
asm ("mcr p15, 0, %0, c7, c6, 0" : : "r" (0));
asm volatile("mcr p15, 0, %0, c7, c6, 0" : : "r" (0));
}
void flush_dcache_all(void)
{
asm ("mcr p15, 0, %0, c7, c10, 0" : : "r" (0));
asm ("mcr p15, 0, %0, c7, c10, 4" : : "r" (0));
asm volatile("mcr p15, 0, %0, c7, c10, 0" : : "r" (0));
asm volatile("mcr p15, 0, %0, c7, c10, 4" : : "r" (0));
}
static inline int bad_cache_range(unsigned long start, unsigned long stop)
@ -116,7 +118,7 @@ void invalidate_dcache_range(unsigned long start, unsigned long stop)
return;
while (start < stop) {
asm ("mcr p15, 0, %0, c7, c6, 1" : : "r" (start));
asm volatile("mcr p15, 0, %0, c7, c6, 1" : : "r" (start));
start += CONFIG_SYS_CACHELINE_SIZE;
}
}
@ -127,11 +129,11 @@ void flush_dcache_range(unsigned long start, unsigned long stop)
return;
while (start < stop) {
asm ("mcr p15, 0, %0, c7, c14, 1" : : "r" (start));
asm volatile("mcr p15, 0, %0, c7, c14, 1" : : "r" (start));
start += CONFIG_SYS_CACHELINE_SIZE;
}
asm ("mcr p15, 0, %0, c7, c10, 4" : : "r" (0));
asm volatile("mcr p15, 0, %0, c7, c10, 4" : : "r" (0));
}
void flush_cache(unsigned long start, unsigned long size)