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ARM: invalidate caches thoroughly 

The data caches should be invalided once during startup. This should
also be done when we do not have the MMU enabled in barebox because
the Kernel does not invalidate the caches during start.

To make this sure this patch enables the arm_early_mmu_cache_invalidate
function even if MMU support is disabled. Additionally this patch adds
calls to arm_early_mmu_cache_invalidate in start.c and uncompress.c.

Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
This commit is contained in:
Sascha Hauer 2013-09-11 12:04:40 +02:00
parent fe4117357f
commit e0be72d3cd
4 changed files with 8 additions and 14 deletions
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6
arch/arm/cpu/Makefile
View File

@ -10,7 +10,7 @@ obj-$(CONFIG_CMD_ARM_CPUINFO) += cpuinfo.o
obj-$(CONFIG_CMD_ARM_MMUINFO) += mmuinfo.o
obj-$(CONFIG_OFDEVICE) += dtb.o
obj-$(CONFIG_MMU) += mmu.o cache.o mmu-early.o
pbl-$(CONFIG_MMU) += cache.o mmu-early.o
pbl-$(CONFIG_MMU) += mmu-early.o
obj-$(CONFIG_CPU_32v4T) += cache-armv4.o
pbl-$(CONFIG_CPU_32v4T) += cache-armv4.o
obj-$(CONFIG_CPU_32v5) += cache-armv5.o
@ -25,7 +25,7 @@ pbl-y += setupc.o
pbl-$(CONFIG_PBL_SINGLE_IMAGE) += start-pbl.o
pbl-$(CONFIG_PBL_MULTI_IMAGES) += start-images.o uncompress.o
obj-y += common.o
pbl-y += common.o
obj-y += common.o cache.o
pbl-y += common.o cache.o
lwl-y += lowlevel.o

4
arch/arm/cpu/start.c
View File

@ -70,8 +70,10 @@ static noinline __noreturn void __start(uint32_t membase, uint32_t memsize,
endmem &= ~0x3fff;
endmem -= SZ_16K; /* ttb */
if (!IS_ENABLED(CONFIG_PBL_IMAGE))
if (!IS_ENABLED(CONFIG_PBL_IMAGE)) {
arm_early_mmu_cache_invalidate();
mmu_early_enable(membase, memsize, endmem);
}
}
/*

2
arch/arm/cpu/uncompress.c
View File

@ -54,6 +54,8 @@ static void noinline uncompress(uint32_t membase,
uint32_t *ptr;
void *pg_start;
arm_early_mmu_cache_invalidate();
endmem -= STACK_SIZE; /* stack */
if (IS_ENABLED(CONFIG_PBL_RELOCATABLE))

10
arch/arm/include/asm/cache.h
View File

@ -8,17 +8,7 @@ static inline void flush_icache(void)
int arm_set_cache_functions(void);
#ifdef CONFIG_MMU
void arm_early_mmu_cache_flush(void);
void arm_early_mmu_cache_invalidate(void);
#else
static inline void arm_early_mmu_cache_flush(void)
{
}
static inline void arm_early_mmu_cache_invalidate(void)
{
}
#endif
#endif