1 #ifndef _ASM_POWERPC_MMU_H_
2 #define _ASM_POWERPC_MMU_H_
5 #include <asm/asm-compat.h>
6 #include <asm/feature-fixups.h>
9 * MMU features bit definitions
13 * First half is MMU families
15 #define MMU_FTR_HPTE_TABLE ASM_CONST(0x00000001)
16 #define MMU_FTR_TYPE_8xx ASM_CONST(0x00000002)
17 #define MMU_FTR_TYPE_40x ASM_CONST(0x00000004)
18 #define MMU_FTR_TYPE_44x ASM_CONST(0x00000008)
19 #define MMU_FTR_TYPE_FSL_E ASM_CONST(0x00000010)
22 * This is individual features
25 /* Enable use of high BAT registers */
26 #define MMU_FTR_USE_HIGH_BATS ASM_CONST(0x00010000)
28 /* Enable >32-bit physical addresses on 32-bit processor, only used
29 * by CONFIG_6xx currently as BookE supports that from day 1
31 #define MMU_FTR_BIG_PHYS ASM_CONST(0x00020000)
33 /* Enable use of broadcast TLB invalidations. We don't always set it
34 * on processors that support it due to other constraints with the
35 * use of such invalidations
37 #define MMU_FTR_USE_TLBIVAX_BCAST ASM_CONST(0x00040000)
39 /* Enable use of tlbilx invalidate instructions.
41 #define MMU_FTR_USE_TLBILX ASM_CONST(0x00080000)
43 /* This indicates that the processor cannot handle multiple outstanding
44 * broadcast tlbivax or tlbsync. This makes the code use a spinlock
45 * around such invalidate forms.
47 #define MMU_FTR_LOCK_BCAST_INVAL ASM_CONST(0x00100000)
49 /* This indicates that the processor doesn't handle way selection
50 * properly and needs SW to track and update the LRU state. This
51 * is specific to an errata on e300c2/c3/c4 class parts
53 #define MMU_FTR_NEED_DTLB_SW_LRU ASM_CONST(0x00200000)
55 /* This indicates that the processor uses the wrong opcode for tlbilx
56 * instructions. During the ISA 2.06 development the opcode for tlbilx
57 * changed and some early implementations used to old opcode
59 #define MMU_FTR_TLBILX_EARLY_OPCODE ASM_CONST(0x00400000)
62 #include <asm/cputable.h>
64 static inline int mmu_has_feature(unsigned long feature)
66 return (cur_cpu_spec->mmu_features & feature);
69 extern unsigned int __start___mmu_ftr_fixup, __stop___mmu_ftr_fixup;
71 /* MMU initialization (64-bit only fo now) */
72 extern void early_init_mmu(void);
73 extern void early_init_mmu_secondary(void);
75 #endif /* !__ASSEMBLY__ */
79 /* 64-bit classic hash table MMU */
80 # include <asm/mmu-hash64.h>
81 #elif defined(CONFIG_PPC_STD_MMU)
82 /* 32-bit classic hash table MMU */
83 # include <asm/mmu-hash32.h>
84 #elif defined(CONFIG_40x)
85 /* 40x-style software loaded TLB */
86 # include <asm/mmu-40x.h>
87 #elif defined(CONFIG_44x)
88 /* 44x-style software loaded TLB */
89 # include <asm/mmu-44x.h>
90 #elif defined(CONFIG_PPC_BOOK3E_MMU)
91 /* Freescale Book-E software loaded TLB or Book-3e (ISA 2.06+) MMU */
92 # include <asm/mmu-book3e.h>
93 #elif defined (CONFIG_PPC_8xx)
94 /* Motorola/Freescale 8xx software loaded TLB */
95 # include <asm/mmu-8xx.h>
98 #endif /* __KERNEL__ */
99 #endif /* _ASM_POWERPC_MMU_H_ */