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[ARM] 4134/1: Add generic support for outer caches

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The outer cache can be L2 as on RealView/EB MPCore platform or even L3
or further on ARMv7 cores. This patch adds the generic support for
flushing the outer cache in the DMA operations.

Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
This commit is contained in:
Catalin Marinas
2007-02-05 14:48:08 +01:00
committed by Russell King
parent 7f8e33546d
commit 953233dc99
5 changed files with 50 additions and 0 deletions
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37
include/asm-arm/cacheflush.h
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@@ -190,6 +190,12 @@ struct cpu_cache_fns {
void (*dma_flush_range)(unsigned long, unsigned long);
};
struct outer_cache_fns {
void (*inv_range)(unsigned long, unsigned long);
void (*clean_range)(unsigned long, unsigned long);
void (*flush_range)(unsigned long, unsigned long);
};
/*
* Select the calling method
*/
@@ -246,6 +252,37 @@ extern void dmac_flush_range(unsigned long, unsigned long);
#endif
#ifdef CONFIG_OUTER_CACHE
extern struct outer_cache_fns outer_cache;
static inline void outer_inv_range(unsigned long start, unsigned long end)
{
if (outer_cache.inv_range)
outer_cache.inv_range(start, end);
}
static inline void outer_clean_range(unsigned long start, unsigned long end)
{
if (outer_cache.clean_range)
outer_cache.clean_range(start, end);
}
static inline void outer_flush_range(unsigned long start, unsigned long end)
{
if (outer_cache.flush_range)
outer_cache.flush_range(start, end);
}
#else
static inline void outer_inv_range(unsigned long start, unsigned long end)
{ }
static inline void outer_clean_range(unsigned long start, unsigned long end)
{ }
static inline void outer_flush_range(unsigned long start, unsigned long end)
{ }
#endif
/*
* flush_cache_vmap() is used when creating mappings (eg, via vmap,
* vmalloc, ioremap etc) in kernel space for pages. Since the