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| author | Chris Dearman <chris@mips.com> | 2007-09-19 01:58:24 +0200 |
|---|---|---|
| committer | Ralf Baechle <ralf@linux-mips.org> | 2008-04-28 18:14:25 +0200 |
| commit | 351336929ccf222ae38ff0cb7a8dd5fd5c6236a0 (patch) | |
| tree | d9e9253bd30cf011d248ad3b63761a9a725e5cb0 /arch/mips/mm/cache.c | |
| parent | [MIPS] Tidy up cache attributes (diff) | |
| download | linux-351336929ccf222ae38ff0cb7a8dd5fd5c6236a0.tar.xz linux-351336929ccf222ae38ff0cb7a8dd5fd5c6236a0.zip | |
[MIPS] Allow setting of the cache attribute at run time.
Slightly tacky, but there is a precedent in the sparc archirecture code.
Signed-off-by: Chris Dearman <chris@mips.com>
Signed-off-by: Atsushi Nemoto <anemo@mba.ocn.ne.jp>
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
Diffstat (limited to 'arch/mips/mm/cache.c')
| -rw-r--r-- | arch/mips/mm/cache.c | 31 |
1 files changed, 23 insertions, 8 deletions
diff --git a/arch/mips/mm/cache.c b/arch/mips/mm/cache.c index f5903679ee6a..034e8506f6ea 100644 --- a/arch/mips/mm/cache.c +++ b/arch/mips/mm/cache.c @@ -130,8 +130,28 @@ void __update_cache(struct vm_area_struct *vma, unsigned long address, } } -static char cache_panic[] __cpuinitdata = - "Yeee, unsupported cache architecture."; +unsigned long _page_cachable_default; +EXPORT_SYMBOL_GPL(_page_cachable_default); + +static inline void setup_protection_map(void) +{ + protection_map[0] = PAGE_NONE; + protection_map[1] = PAGE_READONLY; + protection_map[2] = PAGE_COPY; + protection_map[3] = PAGE_COPY; + protection_map[4] = PAGE_READONLY; + protection_map[5] = PAGE_READONLY; + protection_map[6] = PAGE_COPY; + protection_map[7] = PAGE_COPY; + protection_map[8] = PAGE_NONE; + protection_map[9] = PAGE_READONLY; + protection_map[10] = PAGE_SHARED; + protection_map[11] = PAGE_SHARED; + protection_map[12] = PAGE_READONLY; + protection_map[13] = PAGE_READONLY; + protection_map[14] = PAGE_SHARED; + protection_map[15] = PAGE_SHARED; +} void __devinit cpu_cache_init(void) { @@ -139,34 +159,29 @@ void __devinit cpu_cache_init(void) extern void __weak r3k_cache_init(void); r3k_cache_init(); - return; } if (cpu_has_6k_cache) { extern void __weak r6k_cache_init(void); r6k_cache_init(); - return; } if (cpu_has_4k_cache) { extern void __weak r4k_cache_init(void); r4k_cache_init(); - return; } if (cpu_has_8k_cache) { extern void __weak r8k_cache_init(void); r8k_cache_init(); - return; } if (cpu_has_tx39_cache) { extern void __weak tx39_cache_init(void); tx39_cache_init(); - return; } - panic(cache_panic); + setup_protection_map(); } int __weak __uncached_access(struct file *file, unsigned long addr) |