1 #ifndef _ASM_POWERPC_MMU_44X_H_
2 #define _ASM_POWERPC_MMU_44X_H_
9 #define PPC44x_MMUCR_TID 0x000000ff
10 #define PPC44x_MMUCR_STS 0x00010000
12 #define PPC44x_TLB_PAGEID 0
13 #define PPC44x_TLB_XLAT 1
14 #define PPC44x_TLB_ATTRIB 2
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
29 /* Translation fields */
30 #define PPC44x_TLB_RPN_MASK 0xfffffc00 /* Real Page Number */
31 #define PPC44x_TLB_ERPN_MASK 0x0000000f
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 */
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 */
53 /* Number of TLB entries */
54 #define PPC44x_TLB_SIZE 64
58 extern unsigned int tlb_44x_hwater;
59 extern unsigned int tlb_44x_index;
64 unsigned long vdso_base;
67 #endif /* !__ASSEMBLY__ */
69 #ifndef CONFIG_PPC_EARLY_DEBUG_44x
70 #define PPC44x_EARLY_TLBS 1
72 #define PPC44x_EARLY_TLBS 2
73 #define PPC44x_EARLY_DEBUG_VIRTADDR (ASM_CONST(0xf0000000) \
74 | (ASM_CONST(CONFIG_PPC_EARLY_DEBUG_44x_PHYSLOW) & 0xffff))
77 /* Size of the TLBs used for pinning in lowmem */
78 #define PPC_PIN_SIZE (1 << 28) /* 256M */
80 #if (PAGE_SHIFT == 12)
81 #define PPC44x_TLBE_SIZE PPC44x_TLB_4K
82 #elif (PAGE_SHIFT == 14)
83 #define PPC44x_TLBE_SIZE PPC44x_TLB_16K
84 #elif (PAGE_SHIFT == 16)
85 #define PPC44x_TLBE_SIZE PPC44x_TLB_64K
86 #elif (PAGE_SHIFT == 18)
87 #define PPC44x_TLBE_SIZE PPC44x_TLB_256K
89 #error "Unsupported PAGE_SIZE"
92 #define PPC44x_PGD_OFF_SHIFT (32 - PGDIR_SHIFT + PGD_T_LOG2)
93 #define PPC44x_PGD_OFF_MASK_BIT (PGDIR_SHIFT - PGD_T_LOG2)
94 #define PPC44x_PTE_ADD_SHIFT (32 - PGDIR_SHIFT + PTE_SHIFT + PTE_T_LOG2)
95 #define PPC44x_PTE_ADD_MASK_BIT (32 - PTE_T_LOG2 - PTE_SHIFT)
97 #endif /* _ASM_POWERPC_MMU_44X_H_ */