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)
20 #define MMU_FTR_TYPE_3E ASM_CONST(0x00000020)
23 * This is individual features
26 /* Enable use of high BAT registers */
27 #define MMU_FTR_USE_HIGH_BATS ASM_CONST(0x00010000)
29 /* Enable >32-bit physical addresses on 32-bit processor, only used
30 * by CONFIG_6xx currently as BookE supports that from day 1
32 #define MMU_FTR_BIG_PHYS ASM_CONST(0x00020000)
34 /* Enable use of broadcast TLB invalidations. We don't always set it
35 * on processors that support it due to other constraints with the
36 * use of such invalidations
38 #define MMU_FTR_USE_TLBIVAX_BCAST ASM_CONST(0x00040000)
40 /* Enable use of tlbilx invalidate instructions.
42 #define MMU_FTR_USE_TLBILX ASM_CONST(0x00080000)
44 /* This indicates that the processor cannot handle multiple outstanding
45 * broadcast tlbivax or tlbsync. This makes the code use a spinlock
46 * around such invalidate forms.
48 #define MMU_FTR_LOCK_BCAST_INVAL ASM_CONST(0x00100000)
50 /* This indicates that the processor doesn't handle way selection
51 * properly and needs SW to track and update the LRU state. This
52 * is specific to an errata on e300c2/c3/c4 class parts
54 #define MMU_FTR_NEED_DTLB_SW_LRU ASM_CONST(0x00200000)
56 /* This indicates that the processor uses the ISA 2.06 server tlbie
59 #define MMU_FTR_TLBIE_206 ASM_CONST(0x00400000)
61 /* Enable use of TLB reservation. Processor should support tlbsrx.
62 * instruction and MAS0[WQ].
64 #define MMU_FTR_USE_TLBRSRV ASM_CONST(0x00800000)
66 /* Use paired MAS registers (MAS7||MAS3, etc.)
68 #define MMU_FTR_USE_PAIRED_MAS ASM_CONST(0x01000000)
71 #include <asm/cputable.h>
73 static inline int mmu_has_feature(unsigned long feature)
75 return (cur_cpu_spec->mmu_features & feature);
78 extern unsigned int __start___mmu_ftr_fixup, __stop___mmu_ftr_fixup;
80 /* MMU initialization (64-bit only fo now) */
81 extern void early_init_mmu(void);
82 extern void early_init_mmu_secondary(void);
84 #endif /* !__ASSEMBLY__ */
86 /* The kernel use the constants below to index in the page sizes array.
87 * The use of fixed constants for this purpose is better for performances
88 * of the low level hash refill handlers.
90 * A non supported page size has a "shift" field set to 0
92 * Any new page size being implemented can get a new entry in here. Whether
93 * the kernel will use it or not is a different matter though. The actual page
94 * size used by hugetlbfs is not defined here and may be made variable
96 * Note: This array ended up being a false good idea as it's growing to the
97 * point where I wonder if we should replace it with something different,
98 * to think about, feedback welcome. --BenH.
101 /* There are #define as they have to be used in assembly
103 * WARNING: If you change this list, make sure to update the array of
104 * names currently in arch/powerpc/mm/hugetlbpage.c or bad things will
107 #define MMU_PAGE_4K 0
108 #define MMU_PAGE_16K 1
109 #define MMU_PAGE_64K 2
110 #define MMU_PAGE_64K_AP 3 /* "Admixed pages" (hash64 only) */
111 #define MMU_PAGE_256K 4
112 #define MMU_PAGE_1M 5
113 #define MMU_PAGE_8M 6
114 #define MMU_PAGE_16M 7
115 #define MMU_PAGE_256M 8
116 #define MMU_PAGE_1G 9
117 #define MMU_PAGE_16G 10
118 #define MMU_PAGE_64G 11
119 #define MMU_PAGE_COUNT 12
122 #if defined(CONFIG_PPC_STD_MMU_64)
123 /* 64-bit classic hash table MMU */
124 # include <asm/mmu-hash64.h>
125 #elif defined(CONFIG_PPC_STD_MMU_32)
126 /* 32-bit classic hash table MMU */
127 # include <asm/mmu-hash32.h>
128 #elif defined(CONFIG_40x)
129 /* 40x-style software loaded TLB */
130 # include <asm/mmu-40x.h>
131 #elif defined(CONFIG_44x)
132 /* 44x-style software loaded TLB */
133 # include <asm/mmu-44x.h>
134 #elif defined(CONFIG_PPC_BOOK3E_MMU)
135 /* Freescale Book-E software loaded TLB or Book-3e (ISA 2.06+) MMU */
136 # include <asm/mmu-book3e.h>
137 #elif defined (CONFIG_PPC_8xx)
138 /* Motorola/Freescale 8xx software loaded TLB */
139 # include <asm/mmu-8xx.h>
143 #endif /* __KERNEL__ */
144 #endif /* _ASM_POWERPC_MMU_H_ */