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authorJie Zhang <jie.zhang@analog.com>2009-06-16 09:48:33 +0000
committerMike Frysinger <vapier@gentoo.org>2009-06-22 21:15:59 -0400
commit41ba653f24a39a0e6a4afe9b2763a95a57e042c2 (patch)
tree43eb086046d4eef764878e04512ddd215ca8845b /arch/blackfin/include
parent7c039a90f02c3fdcab8d3ca170c05ad37014189e (diff)
Blackfin: decouple unrelated cache settings to get exact behavior
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>
Diffstat (limited to 'arch/blackfin/include')
-rw-r--r--arch/blackfin/include/asm/cache.h4
-rw-r--r--arch/blackfin/include/asm/cacheflush.h10
-rw-r--r--arch/blackfin/include/asm/cplb.h32
3 files changed, 24 insertions, 22 deletions
diff --git a/arch/blackfin/include/asm/cache.h b/arch/blackfin/include/asm/cache.h
index 2ef669ed922..477050ad5c5 100644
--- a/arch/blackfin/include/asm/cache.h
+++ b/arch/blackfin/include/asm/cache.h
@@ -35,10 +35,10 @@
#if defined(CONFIG_SMP) && \
!defined(CONFIG_BFIN_CACHE_COHERENT)
-# if defined(CONFIG_BFIN_ICACHE)
+# if defined(CONFIG_BFIN_ICACHEABLE) || defined(CONFIG_BFIN_L2_ICACHEABLE)
# define __ARCH_SYNC_CORE_ICACHE
# endif
-# if defined(CONFIG_BFIN_DCACHE)
+# if defined(CONFIG_BFIN_DCACHEABLE) || defined(CONFIG_BFIN_L2_DCACHEABLE)
# define __ARCH_SYNC_CORE_DCACHE
# endif
#ifndef __ASSEMBLY__
diff --git a/arch/blackfin/include/asm/cacheflush.h b/arch/blackfin/include/asm/cacheflush.h
index 5c17dee53b5..7e55549e180 100644
--- a/arch/blackfin/include/asm/cacheflush.h
+++ b/arch/blackfin/include/asm/cacheflush.h
@@ -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
diff --git a/arch/blackfin/include/asm/cplb.h b/arch/blackfin/include/asm/cplb.h
index a75a6a9f094..c5dacf8f8cf 100644
--- a/arch/blackfin/include/asm/cplb.h
+++ b/arch/blackfin/include/asm/cplb.h
@@ -37,8 +37,6 @@
#define L1_IMEMORY ( CPLB_USER_RD | CPLB_VALID | CPLB_LOCK)
#define SDRAM_INON_CHBL ( CPLB_USER_RD | CPLB_VALID)
-/*Use the menuconfig cache policy here - CONFIG_BFIN_WT/CONFIG_BFIN_WB*/
-
#if ANOMALY_05000158
#define ANOMALY_05000158_WORKAROUND 0x200
#else
@@ -47,10 +45,12 @@
#define CPLB_COMMON (CPLB_DIRTY | CPLB_SUPV_WR | CPLB_USER_WR | CPLB_USER_RD | CPLB_VALID | ANOMALY_05000158_WORKAROUND)
-#ifdef CONFIG_BFIN_WB /*Write Back Policy */
+#ifdef CONFIG_BFIN_EXTMEM_WRITEBACK
#define SDRAM_DGENERIC (CPLB_L1_CHBL | CPLB_COMMON)
-#else /*Write Through */
+#elif defined(CONFIG_BFIN_EXTMEM_WRITETHROUGH)
#define SDRAM_DGENERIC (CPLB_L1_CHBL | CPLB_WT | CPLB_L1_AOW | CPLB_COMMON)
+#else
+#define SDRAM_DGENERIC (CPLB_COMMON)
#endif
#define SDRAM_DNON_CHBL (CPLB_COMMON)
@@ -61,21 +61,23 @@
#ifdef CONFIG_SMP
#define L2_ATTR (INITIAL_T | I_CPLB | D_CPLB)
-#define L2_IMEMORY (CPLB_COMMON)
-#define L2_DMEMORY (CPLB_LOCK | CPLB_COMMON)
+#define L2_IMEMORY (CPLB_COMMON | PAGE_SIZE_1MB)
+#define L2_DMEMORY (CPLB_LOCK | CPLB_COMMON | PAGE_SIZE_1MB)
#else
#define L2_ATTR (INITIAL_T | SWITCH_T | I_CPLB | D_CPLB)
-#define L2_IMEMORY (SDRAM_IGENERIC)
-
-# if defined(CONFIG_BFIN_L2_WB)
-# define L2_DMEMORY (CPLB_L1_CHBL | CPLB_COMMON)
-# elif defined(CONFIG_BFIN_L2_WT)
-# define L2_DMEMORY (CPLB_L1_CHBL | CPLB_WT | CPLB_L1_AOW | CPLB_COMMON)
-# elif defined(CONFIG_BFIN_L2_NOT_CACHED)
-# define L2_DMEMORY (CPLB_COMMON)
+# if defined(CONFIG_BFIN_L2_ICACHEABLE)
+# define L2_IMEMORY (CPLB_L1_CHBL | CPLB_USER_RD | CPLB_VALID | PAGE_SIZE_1MB)
+# else
+# define L2_IMEMORY ( CPLB_USER_RD | CPLB_VALID | PAGE_SIZE_1MB)
+# endif
+
+# if defined(CONFIG_BFIN_L2_WRITEBACK)
+# define L2_DMEMORY (CPLB_L1_CHBL | CPLB_COMMON | PAGE_SIZE_1MB)
+# elif defined(CONFIG_BFIN_L2_WRITETHROUGH)
+# define L2_DMEMORY (CPLB_L1_CHBL | CPLB_WT | CPLB_L1_AOW | CPLB_COMMON | PAGE_SIZE_1MB)
# else
-# define L2_DMEMORY (0)
+# define L2_DMEMORY (CPLB_COMMON | PAGE_SIZE_1MB)
# endif
#endif /* CONFIG_SMP */