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author | Linus Torvalds <torvalds@ppc970.osdl.org> | 2005-04-16 15:20:36 -0700 |
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committer | Linus Torvalds <torvalds@ppc970.osdl.org> | 2005-04-16 15:20:36 -0700 |
commit | 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 (patch) | |
tree | 0bba044c4ce775e45a88a51686b5d9f90697ea9d /arch/m32r/mm/cache.c | |
download | linux-stable-1da177e4c3f41524e886b7f1b8a0c1fc7321cac2.tar.gz linux-stable-1da177e4c3f41524e886b7f1b8a0c1fc7321cac2.tar.bz2 linux-stable-1da177e4c3f41524e886b7f1b8a0c1fc7321cac2.zip |
Linux-2.6.12-rc2v2.6.12-rc2
Initial git repository build. I'm not bothering with the full history,
even though we have it. We can create a separate "historical" git
archive of that later if we want to, and in the meantime it's about
3.2GB when imported into git - space that would just make the early
git days unnecessarily complicated, when we don't have a lot of good
infrastructure for it.
Let it rip!
Diffstat (limited to 'arch/m32r/mm/cache.c')
-rw-r--r-- | arch/m32r/mm/cache.c | 65 |
1 files changed, 65 insertions, 0 deletions
diff --git a/arch/m32r/mm/cache.c b/arch/m32r/mm/cache.c new file mode 100644 index 000000000000..31b0789c1992 --- /dev/null +++ b/arch/m32r/mm/cache.c @@ -0,0 +1,65 @@ +/* + * linux/arch/m32r/mm/cache.c + * + * Copyright (C) 2002 Hirokazu Takata + */ + +#include <linux/config.h> +#include <asm/pgtable.h> + +#undef MCCR + +#if defined(CONFIG_CHIP_XNUX2) || defined(CONFIG_CHIP_M32700) || defined(CONFIG_CHIP_VDEC2) || defined(CONFIG_CHIP_OPSP) +/* Cache Control Register */ +#define MCCR ((volatile unsigned long*)0xfffffffc) +#define MCCR_CC (1UL << 7) /* Cache mode modify bit */ +#define MCCR_IIV (1UL << 6) /* I-cache invalidate */ +#define MCCR_DIV (1UL << 5) /* D-cache invalidate */ +#define MCCR_DCB (1UL << 4) /* D-cache copy back */ +#define MCCR_ICM (1UL << 1) /* I-cache mode [0:off,1:on] */ +#define MCCR_DCM (1UL << 0) /* D-cache mode [0:off,1:on] */ +#define MCCR_ICACHE_INV (MCCR_CC|MCCR_IIV) +#define MCCR_DCACHE_CB (MCCR_CC|MCCR_DCB) +#define MCCR_DCACHE_CBINV (MCCR_CC|MCCR_DIV|MCCR_DCB) +#define CHECK_MCCR(mccr) (mccr = *MCCR) +#elif defined(CONFIG_CHIP_M32102) +#define MCCR ((volatile unsigned char*)0xfffffffe) +#define MCCR_IIV (1UL << 0) /* I-cache invalidate */ +#define MCCR_ICACHE_INV MCCR_IIV +#endif /* CONFIG_CHIP_XNUX2 || CONFIG_CHIP_M32700 */ + +#ifndef MCCR +#error Unknown cache type. +#endif + + +/* Copy back and invalidate D-cache and invalidate I-cache all */ +void _flush_cache_all(void) +{ +#if defined(CONFIG_CHIP_M32102) + *MCCR = MCCR_ICACHE_INV; +#else + unsigned long mccr; + + /* Copyback and invalidate D-cache */ + /* Invalidate I-cache */ + *MCCR = MCCR_ICACHE_INV | MCCR_DCACHE_CBINV; + while ((mccr = *MCCR) & MCCR_IIV); /* loop while invalidating... */ +#endif +} + +/* Copy back D-cache and invalidate I-cache all */ +void _flush_cache_copyback_all(void) +{ +#if defined(CONFIG_CHIP_M32102) + *MCCR = MCCR_ICACHE_INV; +#else + unsigned long mccr; + + /* Copyback D-cache */ + /* Invalidate I-cache */ + *MCCR = MCCR_ICACHE_INV | MCCR_DCACHE_CB; + while ((mccr = *MCCR) & MCCR_IIV); /* loop while invalidating... */ + +#endif +} |