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Blackfin: decouple unrelated cache settings to get exact behavior

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The current cache options don't really represent the hardware features.
They end up setting different aspects of the hardware so that the end
result is to turn on/off the cache.  Unfortunately, when we hit cache
problems with the hardware, it's difficult to test different settings to
root cause the problem.  The current settings also don't cleanly allow for
different caching behaviors with different regions of memory.

So split the configure options such that they properly reflect the settings
that are applied to the hardware.

Signed-off-by: Jie Zhang <jie.zhang@analog.com>
Signed-off-by: Mike Frysinger <vapier@gentoo.org>
This commit is contained in:
Jie Zhang
2009-06-16 09:48:33 +00:00
committed by Mike Frysinger
parent 7c039a90f0
commit 41ba653f24
11 changed files with 212 additions and 117 deletions
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10
arch/blackfin/include/asm/cacheflush.h
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@@ -56,7 +56,7 @@ extern void blackfin_invalidate_entire_icache(void);
static inline void flush_icache_range(unsigned start, unsigned end)
{
#if defined(CONFIG_BFIN_WB)
#if defined(CONFIG_BFIN_EXTMEM_WRITEBACK) || defined(CONFIG_BFIN_L2_WRITEBACK)
blackfin_dcache_flush_range(start, end);
#endif
@@ -87,9 +87,9 @@ do { memcpy(dst, src, len); \
#else
# define invalidate_dcache_range(start,end) do { } while (0)
#endif
#if defined(CONFIG_BFIN_DCACHE) && defined(CONFIG_BFIN_WB)
#if defined(CONFIG_BFIN_EXTMEM_WRITEBACK) || defined(CONFIG_BFIN_L2_WRITEBACK)
# define flush_dcache_range(start,end) blackfin_dcache_flush_range((start), (end))
# define flush_dcache_page(page) blackfin_dflush_page(page_address(page))
# define flush_dcache_page(page) blackfin_dflush_page(page_address(page))
#else
# define flush_dcache_range(start,end) do { } while (0)
# define flush_dcache_page(page) do { } while (0)
@@ -100,7 +100,7 @@ extern unsigned long reserved_mem_icache_on;
static inline int bfin_addr_dcacheable(unsigned long addr)
{
#ifdef CONFIG_BFIN_DCACHE
#ifdef CONFIG_BFIN_EXTMEM_DCACHEABLE
if (addr < (_ramend - DMA_UNCACHED_REGION))
return 1;
#endif
@@ -109,7 +109,7 @@ static inline int bfin_addr_dcacheable(unsigned long addr)
addr >= _ramend && addr < physical_mem_end)
return 1;
#ifndef CONFIG_BFIN_L2_NOT_CACHED
#ifdef CONFIG_BFIN_L2_DCACHEABLE
if (addr >= L2_START && addr < L2_START + L2_LENGTH)
return 1;
#endif