pte.h (10643B) - Raw
1 /*- 2 * Copyright 2014 Svatopluk Kraus <onwahe@gmail.com> 3 * Copyright 2014 Michal Meloun <meloun@miracle.cz> 4 * All rights reserved. 5 * 6 * Redistribution and use in source and binary forms, with or without 7 * modification, are permitted provided that the following conditions 8 * are met: 9 * 1. Redistributions of source code must retain the above copyright 10 * notice, this list of conditions and the following disclaimer. 11 * 2. Redistributions in binary form must reproduce the above copyright 12 * notice, this list of conditions and the following disclaimer in the 13 * documentation and/or other materials provided with the distribution. 14 * 15 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 16 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 17 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 18 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 19 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 20 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 21 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 22 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 23 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 24 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 25 * SUCH DAMAGE. 26 */ 27 28 #ifndef _MACHINE_PTE_V6_H_ 29 #define _MACHINE_PTE_V6_H_ 30 31 /* 32 * Domain Types for the Domain Access Control Register. 33 */ 34 #define DOMAIN_FAULT 0x00 /* no access */ 35 #define DOMAIN_CLIENT 0x01 /* client */ 36 #define DOMAIN_RESERVED 0x02 /* reserved */ 37 #define DOMAIN_MANAGER 0x03 /* manager */ 38 39 /* 40 * TEX remap registers attributes 41 */ 42 #define PRRR_SO 0 /* Strongly ordered memory */ 43 #define PRRR_DEV 1 /* Device memory */ 44 #define PRRR_MEM 2 /* Normal memory */ 45 #define PRRR_DS0 (1 << 16) /* Shared bit for Device, S = 0 */ 46 #define PRRR_DS1 (1 << 17) /* Shared bit for Device, S = 1 */ 47 #define PRRR_NS0 (1 << 18) /* Shared bit for Normal, S = 0 */ 48 #define PRRR_NS1 (1 << 19) /* Shared bit for Normal, S = 1 */ 49 #define PRRR_NOS_SHIFT 24 /* base shif for Not Outer Shared bits */ 50 51 #define NMRR_NC 0 /* Noncachable*/ 52 #define NMRR_WB_WA 1 /* Write Back, Write Allocate */ 53 #define NMRR_WT 2 /* Write Through, Non-Write Allocate */ 54 #define NMRR_WB 3 /* Write Back, Non-Write Allocate */ 55 56 /* 57 * 58 * The ARM MMU is capable of mapping memory in the following chunks: 59 * 60 * 16M Supersections (L1 table) 61 * 62 * 1M Sections (L1 table) 63 * 64 * 64K Large Pages (L2 table) 65 * 66 * 4K Small Pages (L2 table) 67 * 68 * 69 * Coarse Tables can map Large and Small Pages. 70 * Coarse Tables are 1K in length. 71 * 72 * The Translation Table Base register holds the pointer to the 73 * L1 Table. The L1 Table is a 16K contiguous chunk of memory 74 * aligned to a 16K boundary. Each entry in the L1 Table maps 75 * 1M of virtual address space, either via a Section mapping or 76 * via an L2 Table. 77 * 78 */ 79 #define L1_TABLE_SIZE 0x4000 /* 16K */ 80 #define L1_ENTRIES 0x1000 /* 4K */ 81 #define L2_TABLE_SIZE 0x0400 /* 1K */ 82 #define L2_ENTRIES 0x0100 /* 256 */ 83 84 /* ARMv6 super-sections. */ 85 #define L1_SUP_SIZE 0x01000000 /* 16M */ 86 #define L1_SUP_OFFSET (L1_SUP_SIZE - 1) 87 #define L1_SUP_FRAME (~L1_SUP_OFFSET) 88 #define L1_SUP_SHIFT 24 89 90 #define L1_S_SIZE 0x00100000 /* 1M */ 91 #define L1_S_OFFSET (L1_S_SIZE - 1) 92 #define L1_S_FRAME (~L1_S_OFFSET) 93 #define L1_S_SHIFT 20 94 95 #define L2_L_SIZE 0x00010000 /* 64K */ 96 #define L2_L_OFFSET (L2_L_SIZE - 1) 97 #define L2_L_FRAME (~L2_L_OFFSET) 98 #define L2_L_SHIFT 16 99 100 #define L2_S_SIZE 0x00001000 /* 4K */ 101 #define L2_S_OFFSET (L2_S_SIZE - 1) 102 #define L2_S_FRAME (~L2_S_OFFSET) 103 #define L2_S_SHIFT 12 104 105 /* 106 * ARM MMU L1 Descriptors 107 */ 108 #define L1_TYPE_INV 0x00 /* Invalid (fault) */ 109 #define L1_TYPE_C 0x01 /* Coarse L2 */ 110 #define L1_TYPE_S 0x02 /* Section */ 111 #define L1_TYPE_MASK 0x03 /* Mask of type bits */ 112 113 /* L1 Section Descriptor */ 114 #define L1_S_B 0x00000004 /* bufferable Section */ 115 #define L1_S_C 0x00000008 /* cacheable Section */ 116 #define L1_S_NX 0x00000010 /* not executeable */ 117 #define L1_S_DOM(x) ((x) << 5) /* domain */ 118 #define L1_S_DOM_MASK L1_S_DOM(0xf) 119 #define L1_S_P 0x00000200 /* ECC enable for this section */ 120 #define L1_S_AP(x) ((x) << 10) /* access permissions */ 121 #define L1_S_AP0 0x00000400 /* access permissions bit 0 */ 122 #define L1_S_AP1 0x00000800 /* access permissions bit 1 */ 123 #define L1_S_TEX(x) ((x) << 12) /* type extension */ 124 #define L1_S_TEX0 0x00001000 /* type extension bit 0 */ 125 #define L1_S_TEX1 0x00002000 /* type extension bit 1 */ 126 #define L1_S_TEX2 0x00004000 /* type extension bit 2 */ 127 #define L1_S_AP2 0x00008000 /* access permissions bit 2 */ 128 #define L1_S_SHARED 0x00010000 /* shared */ 129 #define L1_S_NG 0x00020000 /* not global */ 130 #define L1_S_SUPERSEC 0x00040000 /* Section is a super-section. */ 131 #define L1_S_ADDR_MASK 0xfff00000 /* phys address of section */ 132 133 /* L1 Coarse Descriptor */ 134 #define L1_C_DOM(x) ((x) << 5) /* domain */ 135 #define L1_C_DOM_MASK L1_C_DOM(0xf) 136 #define L1_C_P 0x00000200 /* ECC enable for this section */ 137 #define L1_C_ADDR_MASK 0xfffffc00 /* phys address of L2 Table */ 138 139 /* 140 * ARM MMU L2 Descriptors 141 */ 142 #define L2_TYPE_INV 0x00 /* Invalid (fault) */ 143 #define L2_TYPE_L 0x01 /* Large Page - 64k - not used yet*/ 144 #define L2_TYPE_S 0x02 /* Small Page - 4 */ 145 #define L2_TYPE_MASK 0x03 146 147 #define L2_NX 0x00000001 /* Not executable */ 148 #define L2_B 0x00000004 /* Bufferable page */ 149 #define L2_C 0x00000008 /* Cacheable page */ 150 #define L2_CB_SHIFT 2 /* C,B bit field shift */ 151 #define L2_AP(x) ((x) << 4) 152 #define L2_AP0 0x00000010 /* access permissions bit 0*/ 153 #define L2_AP1 0x00000020 /* access permissions bit 1*/ 154 #define L2_TEX_SHIFT 6 /* type extension field shift */ 155 #define L2_TEX(x) ((x) << L2_TEX_SHIFT) /* type extension */ 156 #define L2_TEX0 0x00000040 /* type extension bit 0 */ 157 #define L2_TEX1 0x00000080 /* type extension bit 1 */ 158 #define L2_TEX2 0x00000100 /* type extension bit 2 */ 159 #define L2_AP2 0x00000200 /* access permissions bit 2*/ 160 #define L2_SHARED 0x00000400 /* shared */ 161 #define L2_NG 0x00000800 /* not global */ 162 163 /* 164 * TEX classes encoding 165 */ 166 #define TEX1_CLASS_0 ( 0) 167 #define TEX1_CLASS_1 ( L1_S_B) 168 #define TEX1_CLASS_2 ( L1_S_C ) 169 #define TEX1_CLASS_3 ( L1_S_C | L1_S_B) 170 #define TEX1_CLASS_4 (L1_S_TEX0 ) 171 #define TEX1_CLASS_5 (L1_S_TEX0 | L1_S_B) 172 #define TEX1_CLASS_6 (L1_S_TEX0 | L1_S_C ) /* Reserved for ARM11 */ 173 #define TEX1_CLASS_7 (L1_S_TEX0 | L1_S_C | L1_S_B) 174 175 #define TEX2_CLASS_0 ( 0) 176 #define TEX2_CLASS_1 ( L2_B) 177 #define TEX2_CLASS_2 ( L2_C ) 178 #define TEX2_CLASS_3 ( L2_C | L2_B) 179 #define TEX2_CLASS_4 (L2_TEX0 ) 180 #define TEX2_CLASS_5 (L2_TEX0 | L2_B) 181 #define TEX2_CLASS_6 (L2_TEX0 | L2_C ) /* Reserved for ARM11 */ 182 #define TEX2_CLASS_7 (L2_TEX0 | L2_C | L2_B) 183 184 /* L1 table definitions. */ 185 #define NB_IN_PT1 L1_TABLE_SIZE 186 #define NPTE1_IN_PT1 L1_ENTRIES 187 188 /* L2 table definitions. */ 189 #define NB_IN_PT2 L2_TABLE_SIZE 190 #define NPTE2_IN_PT2 L2_ENTRIES 191 192 /* 193 * Map memory attributes to TEX classes 194 */ 195 #define PTE2_ATTR_WB_WA TEX2_CLASS_0 196 #define PTE2_ATTR_NOCACHE TEX2_CLASS_1 197 #define PTE2_ATTR_DEVICE TEX2_CLASS_2 198 #define PTE2_ATTR_SO TEX2_CLASS_3 199 #define PTE2_ATTR_WT TEX2_CLASS_4 200 /* 201 * Software defined bits for L1 descriptors 202 * - L1_AP0 is used as page accessed bit 203 * - L1_AP2 (RO / not RW) is used as page not modified bit 204 * - L1_TEX0 is used as software emulated RO bit 205 */ 206 #define PTE1_V L1_TYPE_S /* Valid bit */ 207 #define PTE1_A L1_S_AP0 /* Accessed - software emulated */ 208 #define PTE1_NM L1_S_AP2 /* not modified bit - software emulated 209 * used as real write enable bit */ 210 #define PTE1_M 0 /* Modified (dummy) */ 211 #define PTE1_S L1_S_SHARED /* Shared */ 212 #define PTE1_NG L1_S_NG /* Not global */ 213 #define PTE1_G 0 /* Global (dummy) */ 214 #define PTE1_NX L1_S_NX /* Not executable */ 215 #define PTE1_X 0 /* Executable (dummy) */ 216 #define PTE1_RO L1_S_TEX1 /* Read Only */ 217 #define PTE1_RW 0 /* Read-Write (dummy) */ 218 #define PTE1_U L1_S_AP1 /* User */ 219 #define PTE1_NU 0 /* Not user (kernel only) (dummy) */ 220 #define PTE1_W L1_S_TEX2 /* Wired */ 221 222 #define PTE1_SHIFT L1_S_SHIFT 223 #define PTE1_SIZE L1_S_SIZE 224 #define PTE1_OFFSET L1_S_OFFSET 225 #define PTE1_FRAME L1_S_FRAME 226 227 #define PTE1_ATTR_MASK (L1_S_TEX0 | L1_S_C | L1_S_B) 228 229 #define PTE1_AP_KR (PTE1_RO | PTE1_NM) 230 #define PTE1_AP_KRW 0 231 #define PTE1_AP_KRUR (PTE1_RO | PTE1_NM | PTE1_U) 232 #define PTE1_AP_KRWURW PTE1_U 233 234 /* 235 * PTE1 descriptors creation macros. 236 */ 237 #define PTE1_PA(pa) ((pa) & PTE1_FRAME) 238 #define PTE1_AP_COMMON (PTE1_V | PTE1_S) 239 240 #define PTE1(pa, ap, attr) (PTE1_PA(pa) | (ap) | (attr) | PTE1_AP_COMMON) 241 242 #define PTE1_KERN(pa, ap, attr) PTE1(pa, (ap) | PTE1_A | PTE1_G, attr) 243 #define PTE1_KERN_NG(pa, ap, attr) PTE1(pa, (ap) | PTE1_A | PTE1_NG, attr) 244 245 #define PTE1_LINK(pa) (((pa) & L1_C_ADDR_MASK) | L1_TYPE_C) 246 247 /* 248 * Software defined bits for L2 descriptors 249 * - L2_AP0 is used as page accessed bit 250 * - L2_AP2 (RO / not RW) is used as page not modified bit 251 * - L2_TEX0 is used as software emulated RO bit 252 */ 253 #define PTE2_V L2_TYPE_S /* Valid bit */ 254 #define PTE2_A L2_AP0 /* Accessed - software emulated */ 255 #define PTE2_NM L2_AP2 /* not modified bit - software emulated 256 * used as real write enable bit */ 257 #define PTE2_M 0 /* Modified (dummy) */ 258 #define PTE2_S L2_SHARED /* Shared */ 259 #define PTE2_NG L2_NG /* Not global */ 260 #define PTE2_G 0 /* Global (dummy) */ 261 #define PTE2_NX L2_NX /* Not executable */ 262 #define PTE2_X 0 /* Not executable (dummy) */ 263 #define PTE2_RO L2_TEX1 /* Read Only */ 264 #define PTE2_U L2_AP1 /* User */ 265 #define PTE2_NU 0 /* Not user (kernel only) (dummy) */ 266 #define PTE2_W L2_TEX2 /* Wired */ 267 268 #define PTE2_SHIFT L2_S_SHIFT 269 #define PTE2_SIZE L2_S_SIZE 270 #define PTE2_OFFSET L2_S_OFFSET 271 #define PTE2_FRAME L2_S_FRAME 272 273 #define PTE2_ATTR_MASK (L2_TEX0 | L2_C | L2_B) 274 /* PTE2 attributes to TEX class index: (TEX0 C B) */ 275 #define PTE2_ATTR2IDX(attr) \ 276 ((((attr) & (L2_C | L2_B)) >> L2_CB_SHIFT) | \ 277 (((attr) & L2_TEX0) >> (L2_TEX_SHIFT - L2_CB_SHIFT))) 278 279 #define PTE2_AP_KR (PTE2_RO | PTE2_NM) 280 #define PTE2_AP_KRW 0 281 #define PTE2_AP_KRUR (PTE2_RO | PTE2_NM | PTE2_U) 282 #define PTE2_AP_KRWURW PTE2_U 283 284 /* 285 * PTE2 descriptors creation macros. 286 */ 287 #define PTE2_PA(pa) ((pa) & PTE2_FRAME) 288 #define PTE2_AP_COMMON (PTE2_V | PTE2_S) 289 290 #define PTE2(pa, ap, attr) (PTE2_PA(pa) | (ap) | (attr) | PTE2_AP_COMMON) 291 292 #define PTE2_KERN(pa, ap, attr) PTE2(pa, (ap) | PTE2_A | PTE2_G, attr) 293 #define PTE2_KERN_NG(pa, ap, attr) PTE2(pa, (ap) | PTE2_A | PTE2_NG, attr) 294 295 #endif /* !_MACHINE_PTE_V6_H_ */