1 /* 2 * Copyright (C) 2012 ARM Ltd. 3 * 4 * This program is free software; you can redistribute it and/or modify 5 * it under the terms of the GNU General Public License version 2 as 6 * published by the Free Software Foundation. 7 * 8 * This program is distributed in the hope that it will be useful, 9 * but WITHOUT ANY WARRANTY; without even the implied warranty of 10 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 11 * GNU General Public License for more details. 12 * 13 * You should have received a copy of the GNU General Public License 14 * along with this program. If not, see <http://www.gnu.org/licenses/>. 15 */ 16 #ifndef __ASM_PGTABLE_HWDEF_H 17 #define __ASM_PGTABLE_HWDEF_H 18 19 #define PTRS_PER_PTE (1 << (PAGE_SHIFT - 3)) 20 21 /* 22 * PMD_SHIFT determines the size a level 2 page table entry can map. 23 */ 24 #if CONFIG_PGTABLE_LEVELS > 2 25 #define PMD_SHIFT ((PAGE_SHIFT - 3) * 2 + 3) 26 #define PMD_SIZE (_AC(1, UL) << PMD_SHIFT) 27 #define PMD_MASK (~(PMD_SIZE-1)) 28 #define PTRS_PER_PMD PTRS_PER_PTE 29 #endif 30 31 /* 32 * PUD_SHIFT determines the size a level 1 page table entry can map. 33 */ 34 #if CONFIG_PGTABLE_LEVELS > 3 35 #define PUD_SHIFT ((PAGE_SHIFT - 3) * 3 + 3) 36 #define PUD_SIZE (_AC(1, UL) << PUD_SHIFT) 37 #define PUD_MASK (~(PUD_SIZE-1)) 38 #define PTRS_PER_PUD PTRS_PER_PTE 39 #endif 40 41 /* 42 * PGDIR_SHIFT determines the size a top-level page table entry can map 43 * (depending on the configuration, this level can be 0, 1 or 2). 44 */ 45 #define PGDIR_SHIFT ((PAGE_SHIFT - 3) * CONFIG_PGTABLE_LEVELS + 3) 46 #define PGDIR_SIZE (_AC(1, UL) << PGDIR_SHIFT) 47 #define PGDIR_MASK (~(PGDIR_SIZE-1)) 48 #define PTRS_PER_PGD (1 << (VA_BITS - PGDIR_SHIFT)) 49 50 /* 51 * Section address mask and size definitions. 52 */ 53 #define SECTION_SHIFT PMD_SHIFT 54 #define SECTION_SIZE (_AC(1, UL) << SECTION_SHIFT) 55 #define SECTION_MASK (~(SECTION_SIZE-1)) 56 57 /* 58 * Hardware page table definitions. 59 * 60 * Level 1 descriptor (PUD). 61 */ 62 #define PUD_TYPE_TABLE (_AT(pudval_t, 3) << 0) 63 #define PUD_TABLE_BIT (_AT(pgdval_t, 1) << 1) 64 #define PUD_TYPE_MASK (_AT(pgdval_t, 3) << 0) 65 #define PUD_TYPE_SECT (_AT(pgdval_t, 1) << 0) 66 67 /* 68 * Level 2 descriptor (PMD). 69 */ 70 #define PMD_TYPE_MASK (_AT(pmdval_t, 3) << 0) 71 #define PMD_TYPE_FAULT (_AT(pmdval_t, 0) << 0) 72 #define PMD_TYPE_TABLE (_AT(pmdval_t, 3) << 0) 73 #define PMD_TYPE_SECT (_AT(pmdval_t, 1) << 0) 74 #define PMD_TABLE_BIT (_AT(pmdval_t, 1) << 1) 75 76 /* 77 * Section 78 */ 79 #define PMD_SECT_VALID (_AT(pmdval_t, 1) << 0) 80 #define PMD_SECT_USER (_AT(pmdval_t, 1) << 6) /* AP[1] */ 81 #define PMD_SECT_RDONLY (_AT(pmdval_t, 1) << 7) /* AP[2] */ 82 #define PMD_SECT_S (_AT(pmdval_t, 3) << 8) 83 #define PMD_SECT_AF (_AT(pmdval_t, 1) << 10) 84 #define PMD_SECT_NG (_AT(pmdval_t, 1) << 11) 85 #define PMD_SECT_PXN (_AT(pmdval_t, 1) << 53) 86 #define PMD_SECT_UXN (_AT(pmdval_t, 1) << 54) 87 88 /* 89 * AttrIndx[2:0] encoding (mapping attributes defined in the MAIR* registers). 90 */ 91 #define PMD_ATTRINDX(t) (_AT(pmdval_t, (t)) << 2) 92 #define PMD_ATTRINDX_MASK (_AT(pmdval_t, 7) << 2) 93 94 /* 95 * Level 3 descriptor (PTE). 96 */ 97 #define PTE_TYPE_MASK (_AT(pteval_t, 3) << 0) 98 #define PTE_TYPE_FAULT (_AT(pteval_t, 0) << 0) 99 #define PTE_TYPE_PAGE (_AT(pteval_t, 3) << 0) 100 #define PTE_TABLE_BIT (_AT(pteval_t, 1) << 1) 101 #define PTE_USER (_AT(pteval_t, 1) << 6) /* AP[1] */ 102 #define PTE_RDONLY (_AT(pteval_t, 1) << 7) /* AP[2] */ 103 #define PTE_SHARED (_AT(pteval_t, 3) << 8) /* SH[1:0], inner shareable */ 104 #define PTE_AF (_AT(pteval_t, 1) << 10) /* Access Flag */ 105 #define PTE_NG (_AT(pteval_t, 1) << 11) /* nG */ 106 #define PTE_PXN (_AT(pteval_t, 1) << 53) /* Privileged XN */ 107 #define PTE_UXN (_AT(pteval_t, 1) << 54) /* User XN */ 108 109 /* 110 * AttrIndx[2:0] encoding (mapping attributes defined in the MAIR* registers). 111 */ 112 #define PTE_ATTRINDX(t) (_AT(pteval_t, (t)) << 2) 113 #define PTE_ATTRINDX_MASK (_AT(pteval_t, 7) << 2) 114 115 /* 116 * 2nd stage PTE definitions 117 */ 118 #define PTE_S2_RDONLY (_AT(pteval_t, 1) << 6) /* HAP[2:1] */ 119 #define PTE_S2_RDWR (_AT(pteval_t, 3) << 6) /* HAP[2:1] */ 120 121 #define PMD_S2_RDWR (_AT(pmdval_t, 3) << 6) /* HAP[2:1] */ 122 123 /* 124 * Memory Attribute override for Stage-2 (MemAttr[3:0]) 125 */ 126 #define PTE_S2_MEMATTR(t) (_AT(pteval_t, (t)) << 2) 127 #define PTE_S2_MEMATTR_MASK (_AT(pteval_t, 0xf) << 2) 128 129 /* 130 * EL2/HYP PTE/PMD definitions 131 */ 132 #define PMD_HYP PMD_SECT_USER 133 #define PTE_HYP PTE_USER 134 135 /* 136 * Highest possible physical address supported. 137 */ 138 #define PHYS_MASK_SHIFT (48) 139 #define PHYS_MASK ((UL(1) << PHYS_MASK_SHIFT) - 1) 140 141 /* 142 * TCR flags. 143 */ 144 #define TCR_T0SZ_OFFSET 0 145 #define TCR_T1SZ_OFFSET 16 146 #define TCR_T0SZ(x) ((UL(64) - (x)) << TCR_T0SZ_OFFSET) 147 #define TCR_T1SZ(x) ((UL(64) - (x)) << TCR_T1SZ_OFFSET) 148 #define TCR_TxSZ(x) (TCR_T0SZ(x) | TCR_T1SZ(x)) 149 #define TCR_TxSZ_WIDTH 6 150 #define TCR_IRGN_NC ((UL(0) << 8) | (UL(0) << 24)) 151 #define TCR_IRGN_WBWA ((UL(1) << 8) | (UL(1) << 24)) 152 #define TCR_IRGN_WT ((UL(2) << 8) | (UL(2) << 24)) 153 #define TCR_IRGN_WBnWA ((UL(3) << 8) | (UL(3) << 24)) 154 #define TCR_IRGN_MASK ((UL(3) << 8) | (UL(3) << 24)) 155 #define TCR_ORGN_NC ((UL(0) << 10) | (UL(0) << 26)) 156 #define TCR_ORGN_WBWA ((UL(1) << 10) | (UL(1) << 26)) 157 #define TCR_ORGN_WT ((UL(2) << 10) | (UL(2) << 26)) 158 #define TCR_ORGN_WBnWA ((UL(3) << 10) | (UL(3) << 26)) 159 #define TCR_ORGN_MASK ((UL(3) << 10) | (UL(3) << 26)) 160 #define TCR_SHARED ((UL(3) << 12) | (UL(3) << 28)) 161 #define TCR_TG0_4K (UL(0) << 14) 162 #define TCR_TG0_64K (UL(1) << 14) 163 #define TCR_TG0_16K (UL(2) << 14) 164 #define TCR_TG1_16K (UL(1) << 30) 165 #define TCR_TG1_4K (UL(2) << 30) 166 #define TCR_TG1_64K (UL(3) << 30) 167 168 #define TCR_A1 (UL(1) << 22) 169 #define TCR_ASID16 (UL(1) << 36) 170 #define TCR_TBI0 (UL(1) << 37) 171 172 #endif 173