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| author |   Paul Mundt <lethal@linux-sh.org> | 2006-09-27 15:08:07 +0900 |
|---|---|---|
| committer | Paul Mundt <lethal@linux-sh.org> | 2006-09-27 15:08:07 +0900 |
| commit | 0c7b1df69c62209db19d1279dd882b37c04c5c2f (patch) | |
| tree | 48e8f95b2ec02173ad2e930325e21e4509a08d19 /include | |
| parent | sh: Titan board support. (diff) | |
| download | linux-dev-0c7b1df69c62209db19d1279dd882b37c04c5c2f.tar.xz linux-dev-0c7b1df69c62209db19d1279dd882b37c04c5c2f.zip | |
sh: SH-4A Privileged Space Mapping Buffer (PMB) support.
Add support for 32-bit physical addressing through the SH-4A
Privileged Space Mapping Buffer (PMB).
Signed-off-by: Paul Mundt <lethal@linux-sh.org>
Diffstat (limited to '')
| -rw-r--r-- | include/asm-sh/mmu.h | 48 |
1 files changed, 47 insertions, 1 deletions
diff --git a/include/asm-sh/mmu.h b/include/asm-sh/mmu.h index 72f07be6117f..91c884634276 100644 --- a/include/asm-sh/mmu.h +++ b/include/asm-sh/mmu.h @@ -25,5 +25,51 @@ typedef struct { typedef unsigned long mm_context_t; #endif /* CONFIG_MMU */ -#endif /* __MMH_H */ + +/* + * Privileged Space Mapping Buffer (PMB) definitions + */ +#define PMB_PASCR 0xff000070 +#define PMB_IRMCR 0xff000078 + +#define PMB_ADDR 0xf6100000 +#define PMB_DATA 0xf7100000 +#define PMB_ENTRY_MAX 16 +#define PMB_E_MASK 0x0000000f +#define PMB_E_SHIFT 8 + +#define PMB_SZ_16M 0x00000000 +#define PMB_SZ_64M 0x00000010 +#define PMB_SZ_128M 0x00000080 +#define PMB_SZ_512M 0x00000090 +#define PMB_SZ_MASK PMB_SZ_512M +#define PMB_C 0x00000008 +#define PMB_WT 0x00000001 +#define PMB_UB 0x00000200 +#define PMB_V 0x00000100 + +#define PMB_NO_ENTRY (-1) + +struct pmb_entry { + unsigned long vpn; + unsigned long ppn; + unsigned long flags; + + /* + * 0 .. NR_PMB_ENTRIES for specific entry selection, or + * PMB_NO_ENTRY to search for a free one + */ + int entry; +}; + +/* arch/sh/mm/pmb.c */ +int __set_pmb_entry(unsigned long vpn, unsigned long ppn, + unsigned long flags, int *entry); +void set_pmb_entry(struct pmb_entry *pmbe); +void clear_pmb_entry(struct pmb_entry *pmbe); +struct pmb_entry *pmb_alloc(unsigned long vpn, unsigned long ppn, + unsigned long flags); +void pmb_free(struct pmb_entry *pmbe); + +#endif /* __MMU_H */ |