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ARM: cache: add an empty stub function for invalidate/flush dcache

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Since some driver like ohci, lcd used dcache functions. But some ARM
cpu don't implement the invalidate_dcache_range()/flush_dcache_range()
functions.

To avoid compiling errors this patch adds an weak empty stub function
for all ARM cpu in arch/arm/lib/cache.c.
And ARM cpu still can implemnt its own cache functions on the cpu folder.

Signed-off-by: Josh Wu <josh.wu@atmel.com>
Reviewed-by: York Sun <yorksun@freescale.com>
This commit is contained in:
Wu, Josh 2015-07-27 11:40:16 +08:00 committed by Tom Rini
parent 4dbe4b168b
commit 387871a10e
5 changed files with 9 additions and 32 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

8
arch/arm/cpu/arm11/cpu.c
View File

@ -124,14 +124,6 @@ void flush_dcache_all(void)
{
}
void invalidate_dcache_range(unsigned long start, unsigned long stop)
{
}
void flush_dcache_range(unsigned long start, unsigned long stop)
{
}
void flush_cache(unsigned long start, unsigned long size)
{
}

8
arch/arm/cpu/arm926ejs/cache.c
View File

@ -83,14 +83,6 @@ void flush_dcache_all(void)
{
}
void invalidate_dcache_range(unsigned long start, unsigned long stop)
{
}
void flush_dcache_range(unsigned long start, unsigned long stop)
{
}
void flush_cache(unsigned long start, unsigned long size)
{
}

8
arch/arm/cpu/armv7/cache_v7.c
View File

@ -304,14 +304,6 @@ void flush_dcache_all(void)
{
}
void invalidate_dcache_range(unsigned long start, unsigned long stop)
{
}
void flush_dcache_range(unsigned long start, unsigned long stop)
{
}
void arm_init_before_mmu(void)
{
}

8
arch/arm/cpu/armv8/cache_v8.c
View File

@ -180,14 +180,6 @@ void flush_dcache_all(void)
{
}
void invalidate_dcache_range(unsigned long start, unsigned long stop)
{
}
void flush_dcache_range(unsigned long start, unsigned long stop)
{
}
void dcache_enable(void)
{
}

9
arch/arm/lib/cache.c
View File

@ -53,6 +53,15 @@ __weak void enable_caches(void)
puts("WARNING: Caches not enabled\n");
}
__weak void invalidate_dcache_range(unsigned long start, unsigned long stop)
{
/* An empty stub, real implementation should be in platform code */
}
__weak void flush_dcache_range(unsigned long start, unsigned long stop)
{
/* An empty stub, real implementation should be in platform code */
}
#ifdef CONFIG_SYS_NONCACHED_MEMORY
/*
* Reserve one MMU section worth of address space below the malloc() area that