ARM1136: MX35: Make asm routines volatile in cache ops
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>
diff --git a/arch/arm/cpu/arm1136/cpu.c b/arch/arm/cpu/arm1136/cpu.c
index f2e30b5..f72bab6 100644
--- a/arch/arm/cpu/arm1136/cpu.c
+++ b/arch/arm/cpu/arm1136/cpu.c
@@ -70,10 +70,12 @@
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 @@
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 @@
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 @@
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)