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| author | Paul Mundt <lethal@linux-sh.org> | 2007-07-31 17:07:28 +0900 |
|---|---|---|
| committer | Paul Mundt <lethal@linux-sh.org> | 2007-09-21 11:57:46 +0900 |
| commit | e7bd34a15b85655f24d1b45edbe3bdfebf9d027e (patch) | |
| tree | 051647273266582fe95dcc5cf008534c264be5ae /arch/sh/kernel/cpu/init.c | |
| parent | ac919986d7dfc5d1d9f5585521307f222a8ebeaf (diff) | |
| download | blackbird-op-linux-e7bd34a15b85655f24d1b45edbe3bdfebf9d027e.tar.gz blackbird-op-linux-e7bd34a15b85655f24d1b45edbe3bdfebf9d027e.zip | |
sh: Support explicit L1 cache disabling.
This reworks the cache mode configuration in Kconfig, and allows for
explicit selection of write-back/write-through/off configurations.
All of the cache flushing routines are optimized away for the off
case.
Signed-off-by: Paul Mundt <lethal@linux-sh.org>
Diffstat (limited to 'arch/sh/kernel/cpu/init.c')
| -rw-r--r-- | arch/sh/kernel/cpu/init.c | 11 |
1 files changed, 7 insertions, 4 deletions
diff --git a/arch/sh/kernel/cpu/init.c b/arch/sh/kernel/cpu/init.c index 9172e97dc26a..fdc245b7b043 100644 --- a/arch/sh/kernel/cpu/init.c +++ b/arch/sh/kernel/cpu/init.c @@ -143,12 +143,15 @@ static void __init cache_init(void) flags &= ~CCR_CACHE_EMODE; #endif -#ifdef CONFIG_SH_WRITETHROUGH - /* Turn on Write-through caching */ +#if defined(CONFIG_CACHE_WRITETHROUGH) + /* Write-through */ flags |= CCR_CACHE_WT; -#else - /* .. or default to Write-back */ +#elif defined(CONFIG_CACHE_WRITEBACK) + /* Write-back */ flags |= CCR_CACHE_CB; +#else + /* Off */ + flags &= ~CCR_CACHE_ENABLE; #endif ctrl_outl(flags, CCR); |
