From 7c03d653cd257793dc40520c94e229b5fd0578e7 Mon Sep 17 00:00:00 2001 From: Benjamin Herrenschmidt Date: Thu, 18 Dec 2008 19:13:32 +0000 Subject: 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 Acked-by: Kumar Gala Signed-off-by: Paul Mackerras --- arch/powerpc/include/asm/mmu.h | 41 +++++++++++++++++++++++++++++++++++++++++ 1 file changed, 41 insertions(+) (limited to 'arch/powerpc/include/asm/mmu.h') 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 +#include + +/* + * 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 + +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 -- cgit v1.2.3-70-g09d2