diff options
| author | Benjamin Herrenschmidt <benh@kernel.crashing.org> | 2008-12-18 19:13:32 +0000 |
|---|---|---|
| committer | Paul Mackerras <paulus@samba.org> | 2008-12-21 14:21:16 +1100 |
| commit | 7c03d653cd257793dc40520c94e229b5fd0578e7 (patch) | |
| tree | c2beffddec486c47f8ec6df5c3b592c143380559 /arch/powerpc/include/asm/mmu.h | |
| parent | 2ca8cf738907180e7fbda90f25f32b86feda609f (diff) | |
powerpc/mm: Introduce MMU features
We're soon running out of CPU features and I need to add some new
ones for various MMU related bits, so this patch separates the MMU
features from the CPU features. I moved over the 32-bit MMU related
ones, added base features for MMU type families, but didn't move
over any 64-bit only feature yet.
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Acked-by: Kumar Gala <galak@kernel.crashing.org>
Signed-off-by: Paul Mackerras <paulus@samba.org>
Diffstat (limited to 'arch/powerpc/include/asm/mmu.h')
| -rw-r--r-- | arch/powerpc/include/asm/mmu.h | 41 |
1 files changed, 41 insertions, 0 deletions
diff --git a/arch/powerpc/include/asm/mmu.h b/arch/powerpc/include/asm/mmu.h index 4c0e1b4f975..dc8c0aef5e6 100644 --- a/arch/powerpc/include/asm/mmu.h +++ b/arch/powerpc/include/asm/mmu.h @@ -2,6 +2,47 @@ #define _ASM_POWERPC_MMU_H_ #ifdef __KERNEL__ +#include <asm/asm-compat.h> +#include <asm/feature-fixups.h> + +/* + * MMU features bit definitions + */ + +/* + * First half is MMU families + */ +#define MMU_FTR_HPTE_TABLE ASM_CONST(0x00000001) +#define MMU_FTR_TYPE_8xx ASM_CONST(0x00000002) +#define MMU_FTR_TYPE_40x ASM_CONST(0x00000004) +#define MMU_FTR_TYPE_44x ASM_CONST(0x00000008) +#define MMU_FTR_TYPE_FSL_E ASM_CONST(0x00000010) + +/* + * This is individual features + */ + +/* Enable use of high BAT registers */ +#define MMU_FTR_USE_HIGH_BATS ASM_CONST(0x00010000) + +/* Enable >32-bit physical addresses on 32-bit processor, only used + * by CONFIG_6xx currently as BookE supports that from day 1 + */ +#define MMU_FTR_BIG_PHYS ASM_CONST(0x00020000) + +#ifndef __ASSEMBLY__ +#include <asm/cputable.h> + +static inline int mmu_has_feature(unsigned long feature) +{ + return (cur_cpu_spec->mmu_features & feature); +} + +extern unsigned int __start___mmu_ftr_fixup, __stop___mmu_ftr_fixup; + +#endif /* !__ASSEMBLY__ */ + + #ifdef CONFIG_PPC64 /* 64-bit classic hash table MMU */ # include <asm/mmu-hash64.h> |