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sh: Support explicit L1 cache disabling.

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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>
This commit is contained in:
Paul Mundt
2007-07-31 17:07:28 +09:00
parent ac919986d7
commit e7bd34a15b
9 changed files with 86 additions and 31 deletions
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3
include/asm-sh/pgtable.h
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@@ -563,7 +563,8 @@ struct mm_struct;
extern unsigned int kobjsize(const void *objp);
#endif /* !CONFIG_MMU */
#if defined(CONFIG_CPU_SH4) || defined(CONFIG_SH7705_CACHE_32KB)
#if !defined(CONFIG_CACHE_OFF) && (defined(CONFIG_CPU_SH4) || \
defined(CONFIG_SH7705_CACHE_32KB))
#define __HAVE_ARCH_PTEP_GET_AND_CLEAR
extern pte_t ptep_get_and_clear(struct mm_struct *mm, unsigned long addr, pte_t *ptep);
#endif