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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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32
arch/blackfin/include/asm/cplb.h
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@@ -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_DMEMORY (0)
# 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 (CPLB_COMMON | PAGE_SIZE_1MB)
# endif
#endif /* CONFIG_SMP */