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57d7909e DG |
1 | #ifndef _ASM_POWERPC_MMU_44X_H_ |
2 | #define _ASM_POWERPC_MMU_44X_H_ | |
3 | /* | |
4 | * PPC440 support | |
5 | */ | |
6 | ||
ca9153a3 IY |
7 | #include <asm/page.h> |
8 | ||
57d7909e DG |
9 | #define PPC44x_MMUCR_TID 0x000000ff |
10 | #define PPC44x_MMUCR_STS 0x00010000 | |
11 | ||
12 | #define PPC44x_TLB_PAGEID 0 | |
13 | #define PPC44x_TLB_XLAT 1 | |
14 | #define PPC44x_TLB_ATTRIB 2 | |
15 | ||
16 | /* Page identification fields */ | |
17 | #define PPC44x_TLB_EPN_MASK 0xfffffc00 /* Effective Page Number */ | |
18 | #define PPC44x_TLB_VALID 0x00000200 /* Valid flag */ | |
19 | #define PPC44x_TLB_TS 0x00000100 /* Translation address space */ | |
20 | #define PPC44x_TLB_1K 0x00000000 /* Page sizes */ | |
21 | #define PPC44x_TLB_4K 0x00000010 | |
22 | #define PPC44x_TLB_16K 0x00000020 | |
23 | #define PPC44x_TLB_64K 0x00000030 | |
24 | #define PPC44x_TLB_256K 0x00000040 | |
25 | #define PPC44x_TLB_1M 0x00000050 | |
26 | #define PPC44x_TLB_16M 0x00000070 | |
27 | #define PPC44x_TLB_256M 0x00000090 | |
28 | ||
29 | /* Translation fields */ | |
30 | #define PPC44x_TLB_RPN_MASK 0xfffffc00 /* Real Page Number */ | |
31 | #define PPC44x_TLB_ERPN_MASK 0x0000000f | |
32 | ||
33 | /* Storage attribute and access control fields */ | |
34 | #define PPC44x_TLB_ATTR_MASK 0x0000ff80 | |
35 | #define PPC44x_TLB_U0 0x00008000 /* User 0 */ | |
36 | #define PPC44x_TLB_U1 0x00004000 /* User 1 */ | |
37 | #define PPC44x_TLB_U2 0x00002000 /* User 2 */ | |
38 | #define PPC44x_TLB_U3 0x00001000 /* User 3 */ | |
39 | #define PPC44x_TLB_W 0x00000800 /* Caching is write-through */ | |
40 | #define PPC44x_TLB_I 0x00000400 /* Caching is inhibited */ | |
41 | #define PPC44x_TLB_M 0x00000200 /* Memory is coherent */ | |
42 | #define PPC44x_TLB_G 0x00000100 /* Memory is guarded */ | |
43 | #define PPC44x_TLB_E 0x00000080 /* Memory is guarded */ | |
44 | ||
45 | #define PPC44x_TLB_PERM_MASK 0x0000003f | |
46 | #define PPC44x_TLB_UX 0x00000020 /* User execution */ | |
47 | #define PPC44x_TLB_UW 0x00000010 /* User write */ | |
48 | #define PPC44x_TLB_UR 0x00000008 /* User read */ | |
49 | #define PPC44x_TLB_SX 0x00000004 /* Super execution */ | |
50 | #define PPC44x_TLB_SW 0x00000002 /* Super write */ | |
51 | #define PPC44x_TLB_SR 0x00000001 /* Super read */ | |
52 | ||
53 | /* Number of TLB entries */ | |
54 | #define PPC44x_TLB_SIZE 64 | |
55 | ||
56 | #ifndef __ASSEMBLY__ | |
57 | ||
4baacfb0 HB |
58 | extern unsigned int tlb_44x_hwater; |
59 | ||
57d7909e | 60 | typedef struct { |
2ca8cf73 BH |
61 | unsigned int id; |
62 | unsigned int active; | |
63 | unsigned long vdso_base; | |
57d7909e DG |
64 | } mm_context_t; |
65 | ||
66 | #endif /* !__ASSEMBLY__ */ | |
67 | ||
d9b55a03 | 68 | #ifndef CONFIG_PPC_EARLY_DEBUG_44x |
57d7909e | 69 | #define PPC44x_EARLY_TLBS 1 |
d9b55a03 DG |
70 | #else |
71 | #define PPC44x_EARLY_TLBS 2 | |
72 | #define PPC44x_EARLY_DEBUG_VIRTADDR (ASM_CONST(0xf0000000) \ | |
73 | | (ASM_CONST(CONFIG_PPC_EARLY_DEBUG_44x_PHYSLOW) & 0xffff)) | |
74 | #endif | |
57d7909e DG |
75 | |
76 | /* Size of the TLBs used for pinning in lowmem */ | |
77 | #define PPC_PIN_SIZE (1 << 28) /* 256M */ | |
78 | ||
ca9153a3 IY |
79 | #if (PAGE_SHIFT == 12) |
80 | #define PPC44x_TLBE_SIZE PPC44x_TLB_4K | |
81 | #elif (PAGE_SHIFT == 14) | |
82 | #define PPC44x_TLBE_SIZE PPC44x_TLB_16K | |
83 | #elif (PAGE_SHIFT == 16) | |
84 | #define PPC44x_TLBE_SIZE PPC44x_TLB_64K | |
85 | #else | |
86 | #error "Unsupported PAGE_SIZE" | |
87 | #endif | |
88 | ||
89 | #define PPC44x_PGD_OFF_SHIFT (32 - PGDIR_SHIFT + PGD_T_LOG2) | |
90 | #define PPC44x_PGD_OFF_MASK_BIT (PGDIR_SHIFT - PGD_T_LOG2) | |
91 | #define PPC44x_PTE_ADD_SHIFT (32 - PGDIR_SHIFT + PTE_SHIFT + PTE_T_LOG2) | |
92 | #define PPC44x_PTE_ADD_MASK_BIT (32 - PTE_T_LOG2 - PTE_SHIFT) | |
93 | ||
57d7909e | 94 | #endif /* _ASM_POWERPC_MMU_44X_H_ */ |