1 /* SPDX-License-Identifier: GPL-2.0 */ 2 #ifndef _ASM_POWERPC_MMU_44X_H_ 3 #define _ASM_POWERPC_MMU_44X_H_ 4 /* 5 * PPC440 support 6 */ 7 8 #include <asm/asm-const.h> 9 10 #define PPC44x_MMUCR_TID 0x000000ff 11 #define PPC44x_MMUCR_STS 0x00010000 12 13 #define PPC44x_TLB_PAGEID 0 14 #define PPC44x_TLB_XLAT 1 15 #define PPC44x_TLB_ATTRIB 2 16 17 /* Page identification fields */ 18 #define PPC44x_TLB_EPN_MASK 0xfffffc00 /* Effective Page Number */ 19 #define PPC44x_TLB_VALID 0x00000200 /* Valid flag */ 20 #define PPC44x_TLB_TS 0x00000100 /* Translation address space */ 21 #define PPC44x_TLB_1K 0x00000000 /* Page sizes */ 22 #define PPC44x_TLB_4K 0x00000010 23 #define PPC44x_TLB_16K 0x00000020 24 #define PPC44x_TLB_64K 0x00000030 25 #define PPC44x_TLB_256K 0x00000040 26 #define PPC44x_TLB_1M 0x00000050 27 #define PPC44x_TLB_16M 0x00000070 28 #define PPC44x_TLB_256M 0x00000090 29 30 /* Translation fields */ 31 #define PPC44x_TLB_RPN_MASK 0xfffffc00 /* Real Page Number */ 32 #define PPC44x_TLB_ERPN_MASK 0x0000000f 33 34 /* Storage attribute and access control fields */ 35 #define PPC44x_TLB_ATTR_MASK 0x0000ff80 36 #define PPC44x_TLB_U0 0x00008000 /* User 0 */ 37 #define PPC44x_TLB_U1 0x00004000 /* User 1 */ 38 #define PPC44x_TLB_U2 0x00002000 /* User 2 */ 39 #define PPC44x_TLB_U3 0x00001000 /* User 3 */ 40 #define PPC44x_TLB_W 0x00000800 /* Caching is write-through */ 41 #define PPC44x_TLB_I 0x00000400 /* Caching is inhibited */ 42 #define PPC44x_TLB_M 0x00000200 /* Memory is coherent */ 43 #define PPC44x_TLB_G 0x00000100 /* Memory is guarded */ 44 #define PPC44x_TLB_E 0x00000080 /* Memory is little endian */ 45 46 #define PPC44x_TLB_PERM_MASK 0x0000003f 47 #define PPC44x_TLB_UX 0x00000020 /* User execution */ 48 #define PPC44x_TLB_UW 0x00000010 /* User write */ 49 #define PPC44x_TLB_UR 0x00000008 /* User read */ 50 #define PPC44x_TLB_SX 0x00000004 /* Super execution */ 51 #define PPC44x_TLB_SW 0x00000002 /* Super write */ 52 #define PPC44x_TLB_SR 0x00000001 /* Super read */ 53 54 /* Number of TLB entries */ 55 #define PPC44x_TLB_SIZE 64 56 57 /* 47x bits */ 58 #define PPC47x_MMUCR_TID 0x0000ffff 59 #define PPC47x_MMUCR_STS 0x00010000 60 61 /* Page identification fields */ 62 #define PPC47x_TLB0_EPN_MASK 0xfffff000 /* Effective Page Number */ 63 #define PPC47x_TLB0_VALID 0x00000800 /* Valid flag */ 64 #define PPC47x_TLB0_TS 0x00000400 /* Translation address space */ 65 #define PPC47x_TLB0_4K 0x00000000 66 #define PPC47x_TLB0_16K 0x00000010 67 #define PPC47x_TLB0_64K 0x00000030 68 #define PPC47x_TLB0_1M 0x00000070 69 #define PPC47x_TLB0_16M 0x000000f0 70 #define PPC47x_TLB0_256M 0x000001f0 71 #define PPC47x_TLB0_1G 0x000003f0 72 #define PPC47x_TLB0_BOLTED_R 0x00000008 /* tlbre only */ 73 74 /* Translation fields */ 75 #define PPC47x_TLB1_RPN_MASK 0xfffff000 /* Real Page Number */ 76 #define PPC47x_TLB1_ERPN_MASK 0x000003ff 77 78 /* Storage attribute and access control fields */ 79 #define PPC47x_TLB2_ATTR_MASK 0x0003ff80 80 #define PPC47x_TLB2_IL1I 0x00020000 /* Memory is guarded */ 81 #define PPC47x_TLB2_IL1D 0x00010000 /* Memory is guarded */ 82 #define PPC47x_TLB2_U0 0x00008000 /* User 0 */ 83 #define PPC47x_TLB2_U1 0x00004000 /* User 1 */ 84 #define PPC47x_TLB2_U2 0x00002000 /* User 2 */ 85 #define PPC47x_TLB2_U3 0x00001000 /* User 3 */ 86 #define PPC47x_TLB2_W 0x00000800 /* Caching is write-through */ 87 #define PPC47x_TLB2_I 0x00000400 /* Caching is inhibited */ 88 #define PPC47x_TLB2_M 0x00000200 /* Memory is coherent */ 89 #define PPC47x_TLB2_G 0x00000100 /* Memory is guarded */ 90 #define PPC47x_TLB2_E 0x00000080 /* Memory is little endian */ 91 #define PPC47x_TLB2_PERM_MASK 0x0000003f 92 #define PPC47x_TLB2_UX 0x00000020 /* User execution */ 93 #define PPC47x_TLB2_UW 0x00000010 /* User write */ 94 #define PPC47x_TLB2_UR 0x00000008 /* User read */ 95 #define PPC47x_TLB2_SX 0x00000004 /* Super execution */ 96 #define PPC47x_TLB2_SW 0x00000002 /* Super write */ 97 #define PPC47x_TLB2_SR 0x00000001 /* Super read */ 98 #define PPC47x_TLB2_U_RWX (PPC47x_TLB2_UX|PPC47x_TLB2_UW|PPC47x_TLB2_UR) 99 #define PPC47x_TLB2_S_RWX (PPC47x_TLB2_SX|PPC47x_TLB2_SW|PPC47x_TLB2_SR) 100 #define PPC47x_TLB2_S_RW (PPC47x_TLB2_SW | PPC47x_TLB2_SR) 101 #define PPC47x_TLB2_IMG (PPC47x_TLB2_I | PPC47x_TLB2_M | PPC47x_TLB2_G) 102 103 #ifndef __ASSEMBLY__ 104 105 extern unsigned int tlb_44x_hwater; 106 extern unsigned int tlb_44x_index; 107 108 typedef struct { 109 unsigned int id; 110 unsigned int active; 111 void __user *vdso; 112 } mm_context_t; 113 114 /* patch sites */ 115 extern s32 patch__tlb_44x_hwater_D, patch__tlb_44x_hwater_I; 116 117 #endif /* !__ASSEMBLY__ */ 118 119 #ifndef CONFIG_PPC_EARLY_DEBUG_44x 120 #define PPC44x_EARLY_TLBS 1 121 #else 122 #define PPC44x_EARLY_TLBS 2 123 #define PPC44x_EARLY_DEBUG_VIRTADDR (ASM_CONST(0xf0000000) \ 124 | (ASM_CONST(CONFIG_PPC_EARLY_DEBUG_44x_PHYSLOW) & 0xffff)) 125 #endif 126 127 /* Size of the TLBs used for pinning in lowmem */ 128 #define PPC_PIN_SIZE (1 << 28) /* 256M */ 129 130 #if defined(CONFIG_PPC_4K_PAGES) 131 #define PPC44x_TLBE_SIZE PPC44x_TLB_4K 132 #define PPC47x_TLBE_SIZE PPC47x_TLB0_4K 133 #define mmu_virtual_psize MMU_PAGE_4K 134 #elif defined(CONFIG_PPC_16K_PAGES) 135 #define PPC44x_TLBE_SIZE PPC44x_TLB_16K 136 #define PPC47x_TLBE_SIZE PPC47x_TLB0_16K 137 #define mmu_virtual_psize MMU_PAGE_16K 138 #elif defined(CONFIG_PPC_64K_PAGES) 139 #define PPC44x_TLBE_SIZE PPC44x_TLB_64K 140 #define PPC47x_TLBE_SIZE PPC47x_TLB0_64K 141 #define mmu_virtual_psize MMU_PAGE_64K 142 #elif defined(CONFIG_PPC_256K_PAGES) 143 #define PPC44x_TLBE_SIZE PPC44x_TLB_256K 144 #define mmu_virtual_psize MMU_PAGE_256K 145 #else 146 #error "Unsupported PAGE_SIZE" 147 #endif 148 149 #define mmu_linear_psize MMU_PAGE_256M 150 151 #define PPC44x_PGD_OFF_SHIFT (32 - PGDIR_SHIFT + PGD_T_LOG2) 152 #define PPC44x_PGD_OFF_MASK_BIT (PGDIR_SHIFT - PGD_T_LOG2) 153 #define PPC44x_PTE_ADD_SHIFT (32 - PGDIR_SHIFT + PTE_SHIFT + PTE_T_LOG2) 154 #define PPC44x_PTE_ADD_MASK_BIT (32 - PTE_T_LOG2 - PTE_SHIFT) 155 156 #endif /* _ASM_POWERPC_MMU_44X_H_ */ 157