Antonio Nino Diaz | 7bb01fb | 2017-03-08 14:40:23 +0000 | [diff] [blame] | 1 | /* |
| 2 | * Copyright (c) 2017, ARM Limited and Contributors. All rights reserved. |
| 3 | * |
dp-arm | 82cb2c1 | 2017-05-03 09:38:09 +0100 | [diff] [blame] | 4 | * SPDX-License-Identifier: BSD-3-Clause |
Antonio Nino Diaz | 7bb01fb | 2017-03-08 14:40:23 +0000 | [diff] [blame] | 5 | */ |
| 6 | |
| 7 | #include <arch.h> |
| 8 | #include <arch_helpers.h> |
| 9 | #include <assert.h> |
Antonio Nino Diaz | 7bb01fb | 2017-03-08 14:40:23 +0000 | [diff] [blame] | 10 | #include <common_def.h> |
| 11 | #include <debug.h> |
| 12 | #include <errno.h> |
| 13 | #include <platform_def.h> |
| 14 | #include <string.h> |
| 15 | #include <types.h> |
| 16 | #include <utils.h> |
Sandrine Bailleux | 8933c34 | 2017-05-19 09:59:37 +0100 | [diff] [blame] | 17 | #include <xlat_tables_arch.h> |
| 18 | #include <xlat_tables_defs.h> |
Antonio Nino Diaz | 7bb01fb | 2017-03-08 14:40:23 +0000 | [diff] [blame] | 19 | #include <xlat_tables_v2.h> |
Sandrine Bailleux | 8933c34 | 2017-05-19 09:59:37 +0100 | [diff] [blame] | 20 | |
Antonio Nino Diaz | 7bb01fb | 2017-03-08 14:40:23 +0000 | [diff] [blame] | 21 | #include "xlat_tables_private.h" |
| 22 | |
Sandrine Bailleux | a9ad848 | 2017-07-18 13:26:36 +0100 | [diff] [blame] | 23 | /* |
| 24 | * Each platform can define the size of its physical and virtual address spaces. |
| 25 | * If the platform hasn't defined one or both of them, default to |
| 26 | * ADDR_SPACE_SIZE. The latter is deprecated, though. |
| 27 | */ |
| 28 | #if ERROR_DEPRECATED |
| 29 | # ifdef ADDR_SPACE_SIZE |
| 30 | # error "ADDR_SPACE_SIZE is deprecated. Use PLAT_xxx_ADDR_SPACE_SIZE instead." |
| 31 | # endif |
| 32 | #elif defined(ADDR_SPACE_SIZE) |
| 33 | # ifndef PLAT_PHY_ADDR_SPACE_SIZE |
| 34 | # define PLAT_PHY_ADDR_SPACE_SIZE ADDR_SPACE_SIZE |
| 35 | # endif |
| 36 | # ifndef PLAT_VIRT_ADDR_SPACE_SIZE |
| 37 | # define PLAT_VIRT_ADDR_SPACE_SIZE ADDR_SPACE_SIZE |
| 38 | # endif |
| 39 | #endif |
| 40 | |
| 41 | /* |
| 42 | * Allocate and initialise the default translation context for the BL image |
| 43 | * currently executing. |
| 44 | */ |
| 45 | REGISTER_XLAT_CONTEXT(tf, MAX_MMAP_REGIONS, MAX_XLAT_TABLES, |
| 46 | PLAT_VIRT_ADDR_SPACE_SIZE, PLAT_PHY_ADDR_SPACE_SIZE); |
| 47 | |
Antonio Nino Diaz | 0b64f4e | 2017-02-27 17:23:54 +0000 | [diff] [blame] | 48 | #if PLAT_XLAT_TABLES_DYNAMIC |
| 49 | |
| 50 | /* |
| 51 | * The following functions assume that they will be called using subtables only. |
| 52 | * The base table can't be unmapped, so it is not needed to do any special |
| 53 | * handling for it. |
| 54 | */ |
| 55 | |
| 56 | /* |
| 57 | * Returns the index of the array corresponding to the specified translation |
| 58 | * table. |
| 59 | */ |
| 60 | static int xlat_table_get_index(xlat_ctx_t *ctx, const uint64_t *table) |
| 61 | { |
Varun Wadekar | 6311f63 | 2017-06-07 09:57:42 -0700 | [diff] [blame] | 62 | for (unsigned int i = 0; i < ctx->tables_num; i++) |
Antonio Nino Diaz | 0b64f4e | 2017-02-27 17:23:54 +0000 | [diff] [blame] | 63 | if (ctx->tables[i] == table) |
| 64 | return i; |
| 65 | |
| 66 | /* |
| 67 | * Maybe we were asked to get the index of the base level table, which |
| 68 | * should never happen. |
| 69 | */ |
| 70 | assert(0); |
| 71 | |
| 72 | return -1; |
| 73 | } |
| 74 | |
| 75 | /* Returns a pointer to an empty translation table. */ |
| 76 | static uint64_t *xlat_table_get_empty(xlat_ctx_t *ctx) |
| 77 | { |
Varun Wadekar | 6311f63 | 2017-06-07 09:57:42 -0700 | [diff] [blame] | 78 | for (unsigned int i = 0; i < ctx->tables_num; i++) |
Antonio Nino Diaz | 0b64f4e | 2017-02-27 17:23:54 +0000 | [diff] [blame] | 79 | if (ctx->tables_mapped_regions[i] == 0) |
| 80 | return ctx->tables[i]; |
| 81 | |
| 82 | return NULL; |
| 83 | } |
| 84 | |
| 85 | /* Increments region count for a given table. */ |
| 86 | static void xlat_table_inc_regions_count(xlat_ctx_t *ctx, const uint64_t *table) |
| 87 | { |
| 88 | ctx->tables_mapped_regions[xlat_table_get_index(ctx, table)]++; |
| 89 | } |
| 90 | |
| 91 | /* Decrements region count for a given table. */ |
| 92 | static void xlat_table_dec_regions_count(xlat_ctx_t *ctx, const uint64_t *table) |
| 93 | { |
| 94 | ctx->tables_mapped_regions[xlat_table_get_index(ctx, table)]--; |
| 95 | } |
| 96 | |
| 97 | /* Returns 0 if the speficied table isn't empty, otherwise 1. */ |
| 98 | static int xlat_table_is_empty(xlat_ctx_t *ctx, const uint64_t *table) |
| 99 | { |
| 100 | return !ctx->tables_mapped_regions[xlat_table_get_index(ctx, table)]; |
| 101 | } |
| 102 | |
| 103 | #else /* PLAT_XLAT_TABLES_DYNAMIC */ |
| 104 | |
Antonio Nino Diaz | 7bb01fb | 2017-03-08 14:40:23 +0000 | [diff] [blame] | 105 | /* Returns a pointer to the first empty translation table. */ |
| 106 | static uint64_t *xlat_table_get_empty(xlat_ctx_t *ctx) |
| 107 | { |
| 108 | assert(ctx->next_table < ctx->tables_num); |
| 109 | |
| 110 | return ctx->tables[ctx->next_table++]; |
| 111 | } |
| 112 | |
Antonio Nino Diaz | 0b64f4e | 2017-02-27 17:23:54 +0000 | [diff] [blame] | 113 | #endif /* PLAT_XLAT_TABLES_DYNAMIC */ |
| 114 | |
Antonio Nino Diaz | 7bb01fb | 2017-03-08 14:40:23 +0000 | [diff] [blame] | 115 | /* Returns a block/page table descriptor for the given level and attributes. */ |
Sandrine Bailleux | 28fa2e9 | 2017-04-19 14:02:23 +0100 | [diff] [blame] | 116 | static uint64_t xlat_desc(mmap_attr_t attr, unsigned long long addr_pa, |
Antonio Nino Diaz | a564025 | 2017-04-27 13:30:22 +0100 | [diff] [blame] | 117 | int level, uint64_t execute_never_mask) |
Antonio Nino Diaz | 7bb01fb | 2017-03-08 14:40:23 +0000 | [diff] [blame] | 118 | { |
| 119 | uint64_t desc; |
| 120 | int mem_type; |
| 121 | |
| 122 | /* Make sure that the granularity is fine enough to map this address. */ |
| 123 | assert((addr_pa & XLAT_BLOCK_MASK(level)) == 0); |
| 124 | |
| 125 | desc = addr_pa; |
| 126 | /* |
| 127 | * There are different translation table descriptors for level 3 and the |
| 128 | * rest. |
| 129 | */ |
| 130 | desc |= (level == XLAT_TABLE_LEVEL_MAX) ? PAGE_DESC : BLOCK_DESC; |
| 131 | /* |
| 132 | * Always set the access flag, as TF doesn't manage access flag faults. |
| 133 | * Deduce other fields of the descriptor based on the MT_NS and MT_RW |
| 134 | * memory region attributes. |
| 135 | */ |
| 136 | desc |= (attr & MT_NS) ? LOWER_ATTRS(NS) : 0; |
| 137 | desc |= (attr & MT_RW) ? LOWER_ATTRS(AP_RW) : LOWER_ATTRS(AP_RO); |
| 138 | desc |= LOWER_ATTRS(ACCESS_FLAG); |
| 139 | |
| 140 | /* |
| 141 | * Deduce shareability domain and executability of the memory region |
| 142 | * from the memory type of the attributes (MT_TYPE). |
| 143 | * |
| 144 | * Data accesses to device memory and non-cacheable normal memory are |
| 145 | * coherent for all observers in the system, and correspondingly are |
| 146 | * always treated as being Outer Shareable. Therefore, for these 2 types |
| 147 | * of memory, it is not strictly needed to set the shareability field |
| 148 | * in the translation tables. |
| 149 | */ |
| 150 | mem_type = MT_TYPE(attr); |
| 151 | if (mem_type == MT_DEVICE) { |
| 152 | desc |= LOWER_ATTRS(ATTR_DEVICE_INDEX | OSH); |
| 153 | /* |
| 154 | * Always map device memory as execute-never. |
| 155 | * This is to avoid the possibility of a speculative instruction |
| 156 | * fetch, which could be an issue if this memory region |
| 157 | * corresponds to a read-sensitive peripheral. |
| 158 | */ |
Antonio Nino Diaz | a564025 | 2017-04-27 13:30:22 +0100 | [diff] [blame] | 159 | desc |= execute_never_mask; |
| 160 | |
Antonio Nino Diaz | 7bb01fb | 2017-03-08 14:40:23 +0000 | [diff] [blame] | 161 | } else { /* Normal memory */ |
| 162 | /* |
| 163 | * Always map read-write normal memory as execute-never. |
| 164 | * (Trusted Firmware doesn't self-modify its code, therefore |
| 165 | * R/W memory is reserved for data storage, which must not be |
| 166 | * executable.) |
| 167 | * Note that setting the XN bit here is for consistency only. |
Antonio Nino Diaz | a564025 | 2017-04-27 13:30:22 +0100 | [diff] [blame] | 168 | * The function that enables the MMU sets the SCTLR_ELx.WXN bit, |
Antonio Nino Diaz | 7bb01fb | 2017-03-08 14:40:23 +0000 | [diff] [blame] | 169 | * which makes any writable memory region to be treated as |
| 170 | * execute-never, regardless of the value of the XN bit in the |
| 171 | * translation table. |
| 172 | * |
| 173 | * For read-only memory, rely on the MT_EXECUTE/MT_EXECUTE_NEVER |
| 174 | * attribute to figure out the value of the XN bit. |
| 175 | */ |
Antonio Nino Diaz | a564025 | 2017-04-27 13:30:22 +0100 | [diff] [blame] | 176 | if ((attr & MT_RW) || (attr & MT_EXECUTE_NEVER)) { |
| 177 | desc |= execute_never_mask; |
| 178 | } |
Antonio Nino Diaz | 7bb01fb | 2017-03-08 14:40:23 +0000 | [diff] [blame] | 179 | |
| 180 | if (mem_type == MT_MEMORY) { |
| 181 | desc |= LOWER_ATTRS(ATTR_IWBWA_OWBWA_NTR_INDEX | ISH); |
| 182 | } else { |
| 183 | assert(mem_type == MT_NON_CACHEABLE); |
| 184 | desc |= LOWER_ATTRS(ATTR_NON_CACHEABLE_INDEX | OSH); |
| 185 | } |
| 186 | } |
| 187 | |
| 188 | return desc; |
| 189 | } |
| 190 | |
| 191 | /* |
| 192 | * Enumeration of actions that can be made when mapping table entries depending |
| 193 | * on the previous value in that entry and information about the region being |
| 194 | * mapped. |
| 195 | */ |
| 196 | typedef enum { |
| 197 | |
| 198 | /* Do nothing */ |
| 199 | ACTION_NONE, |
| 200 | |
| 201 | /* Write a block (or page, if in level 3) entry. */ |
| 202 | ACTION_WRITE_BLOCK_ENTRY, |
| 203 | |
| 204 | /* |
| 205 | * Create a new table and write a table entry pointing to it. Recurse |
| 206 | * into it for further processing. |
| 207 | */ |
| 208 | ACTION_CREATE_NEW_TABLE, |
| 209 | |
| 210 | /* |
| 211 | * There is a table descriptor in this entry, read it and recurse into |
| 212 | * that table for further processing. |
| 213 | */ |
| 214 | ACTION_RECURSE_INTO_TABLE, |
| 215 | |
| 216 | } action_t; |
| 217 | |
Antonio Nino Diaz | 0b64f4e | 2017-02-27 17:23:54 +0000 | [diff] [blame] | 218 | #if PLAT_XLAT_TABLES_DYNAMIC |
| 219 | |
| 220 | /* |
| 221 | * Recursive function that writes to the translation tables and unmaps the |
| 222 | * specified region. |
| 223 | */ |
| 224 | static void xlat_tables_unmap_region(xlat_ctx_t *ctx, mmap_region_t *mm, |
| 225 | const uintptr_t table_base_va, |
| 226 | uint64_t *const table_base, |
| 227 | const int table_entries, |
Varun Wadekar | 6311f63 | 2017-06-07 09:57:42 -0700 | [diff] [blame] | 228 | const unsigned int level) |
Antonio Nino Diaz | 0b64f4e | 2017-02-27 17:23:54 +0000 | [diff] [blame] | 229 | { |
| 230 | assert(level >= ctx->base_level && level <= XLAT_TABLE_LEVEL_MAX); |
| 231 | |
| 232 | uint64_t *subtable; |
| 233 | uint64_t desc; |
| 234 | |
| 235 | uintptr_t table_idx_va; |
| 236 | uintptr_t table_idx_end_va; /* End VA of this entry */ |
| 237 | |
| 238 | uintptr_t region_end_va = mm->base_va + mm->size - 1; |
| 239 | |
| 240 | int table_idx; |
| 241 | |
| 242 | if (mm->base_va > table_base_va) { |
| 243 | /* Find the first index of the table affected by the region. */ |
| 244 | table_idx_va = mm->base_va & ~XLAT_BLOCK_MASK(level); |
| 245 | |
| 246 | table_idx = (table_idx_va - table_base_va) >> |
| 247 | XLAT_ADDR_SHIFT(level); |
| 248 | |
| 249 | assert(table_idx < table_entries); |
| 250 | } else { |
| 251 | /* Start from the beginning of the table. */ |
| 252 | table_idx_va = table_base_va; |
| 253 | table_idx = 0; |
| 254 | } |
| 255 | |
| 256 | while (table_idx < table_entries) { |
| 257 | |
| 258 | table_idx_end_va = table_idx_va + XLAT_BLOCK_SIZE(level) - 1; |
| 259 | |
| 260 | desc = table_base[table_idx]; |
| 261 | uint64_t desc_type = desc & DESC_MASK; |
| 262 | |
| 263 | action_t action = ACTION_NONE; |
| 264 | |
| 265 | if ((mm->base_va <= table_idx_va) && |
| 266 | (region_end_va >= table_idx_end_va)) { |
| 267 | |
| 268 | /* Region covers all block */ |
| 269 | |
| 270 | if (level == 3) { |
| 271 | /* |
| 272 | * Last level, only page descriptors allowed, |
| 273 | * erase it. |
| 274 | */ |
| 275 | assert(desc_type == PAGE_DESC); |
| 276 | |
| 277 | action = ACTION_WRITE_BLOCK_ENTRY; |
| 278 | } else { |
| 279 | /* |
| 280 | * Other levels can have table descriptors. If |
| 281 | * so, recurse into it and erase descriptors |
| 282 | * inside it as needed. If there is a block |
| 283 | * descriptor, just erase it. If an invalid |
| 284 | * descriptor is found, this table isn't |
| 285 | * actually mapped, which shouldn't happen. |
| 286 | */ |
| 287 | if (desc_type == TABLE_DESC) { |
| 288 | action = ACTION_RECURSE_INTO_TABLE; |
| 289 | } else { |
| 290 | assert(desc_type == BLOCK_DESC); |
| 291 | action = ACTION_WRITE_BLOCK_ENTRY; |
| 292 | } |
| 293 | } |
| 294 | |
| 295 | } else if ((mm->base_va <= table_idx_end_va) || |
| 296 | (region_end_va >= table_idx_va)) { |
| 297 | |
| 298 | /* |
| 299 | * Region partially covers block. |
| 300 | * |
| 301 | * It can't happen in level 3. |
| 302 | * |
| 303 | * There must be a table descriptor here, if not there |
| 304 | * was a problem when mapping the region. |
| 305 | */ |
| 306 | |
| 307 | assert(level < 3); |
| 308 | |
| 309 | assert(desc_type == TABLE_DESC); |
| 310 | |
| 311 | action = ACTION_RECURSE_INTO_TABLE; |
| 312 | } |
| 313 | |
| 314 | if (action == ACTION_WRITE_BLOCK_ENTRY) { |
| 315 | |
| 316 | table_base[table_idx] = INVALID_DESC; |
| 317 | xlat_arch_tlbi_va(table_idx_va); |
| 318 | |
| 319 | } else if (action == ACTION_RECURSE_INTO_TABLE) { |
| 320 | |
| 321 | subtable = (uint64_t *)(uintptr_t)(desc & TABLE_ADDR_MASK); |
| 322 | |
| 323 | /* Recurse to write into subtable */ |
| 324 | xlat_tables_unmap_region(ctx, mm, table_idx_va, |
| 325 | subtable, XLAT_TABLE_ENTRIES, |
| 326 | level + 1); |
| 327 | |
| 328 | /* |
| 329 | * If the subtable is now empty, remove its reference. |
| 330 | */ |
| 331 | if (xlat_table_is_empty(ctx, subtable)) { |
| 332 | table_base[table_idx] = INVALID_DESC; |
| 333 | xlat_arch_tlbi_va(table_idx_va); |
| 334 | } |
| 335 | |
| 336 | } else { |
| 337 | assert(action == ACTION_NONE); |
| 338 | } |
| 339 | |
| 340 | table_idx++; |
| 341 | table_idx_va += XLAT_BLOCK_SIZE(level); |
| 342 | |
| 343 | /* If reached the end of the region, exit */ |
| 344 | if (region_end_va <= table_idx_va) |
| 345 | break; |
| 346 | } |
| 347 | |
| 348 | if (level > ctx->base_level) |
| 349 | xlat_table_dec_regions_count(ctx, table_base); |
| 350 | } |
| 351 | |
| 352 | #endif /* PLAT_XLAT_TABLES_DYNAMIC */ |
| 353 | |
Antonio Nino Diaz | 7bb01fb | 2017-03-08 14:40:23 +0000 | [diff] [blame] | 354 | /* |
| 355 | * From the given arguments, it decides which action to take when mapping the |
| 356 | * specified region. |
| 357 | */ |
| 358 | static action_t xlat_tables_map_region_action(const mmap_region_t *mm, |
| 359 | const int desc_type, const unsigned long long dest_pa, |
Sandrine Bailleux | 0044231 | 2017-07-19 10:11:13 +0100 | [diff] [blame^] | 360 | const uintptr_t table_entry_base_va, const unsigned int level) |
Antonio Nino Diaz | 7bb01fb | 2017-03-08 14:40:23 +0000 | [diff] [blame] | 361 | { |
| 362 | uintptr_t mm_end_va = mm->base_va + mm->size - 1; |
| 363 | uintptr_t table_entry_end_va = |
| 364 | table_entry_base_va + XLAT_BLOCK_SIZE(level) - 1; |
| 365 | |
| 366 | /* |
| 367 | * The descriptor types allowed depend on the current table level. |
| 368 | */ |
| 369 | |
| 370 | if ((mm->base_va <= table_entry_base_va) && |
| 371 | (mm_end_va >= table_entry_end_va)) { |
| 372 | |
| 373 | /* |
| 374 | * Table entry is covered by region |
| 375 | * -------------------------------- |
| 376 | * |
| 377 | * This means that this table entry can describe the whole |
| 378 | * translation with this granularity in principle. |
| 379 | */ |
| 380 | |
| 381 | if (level == 3) { |
| 382 | /* |
| 383 | * Last level, only page descriptors are allowed. |
| 384 | */ |
| 385 | if (desc_type == PAGE_DESC) { |
| 386 | /* |
| 387 | * There's another region mapped here, don't |
| 388 | * overwrite. |
| 389 | */ |
| 390 | return ACTION_NONE; |
| 391 | } else { |
| 392 | assert(desc_type == INVALID_DESC); |
| 393 | return ACTION_WRITE_BLOCK_ENTRY; |
| 394 | } |
| 395 | |
| 396 | } else { |
| 397 | |
| 398 | /* |
| 399 | * Other levels. Table descriptors are allowed. Block |
| 400 | * descriptors too, but they have some limitations. |
| 401 | */ |
| 402 | |
| 403 | if (desc_type == TABLE_DESC) { |
| 404 | /* There's already a table, recurse into it. */ |
| 405 | return ACTION_RECURSE_INTO_TABLE; |
| 406 | |
| 407 | } else if (desc_type == INVALID_DESC) { |
| 408 | /* |
| 409 | * There's nothing mapped here, create a new |
| 410 | * entry. |
| 411 | * |
| 412 | * Check if the destination granularity allows |
| 413 | * us to use a block descriptor or we need a |
| 414 | * finer table for it. |
| 415 | * |
| 416 | * Also, check if the current level allows block |
| 417 | * descriptors. If not, create a table instead. |
| 418 | */ |
| 419 | if ((dest_pa & XLAT_BLOCK_MASK(level)) || |
| 420 | (level < MIN_LVL_BLOCK_DESC)) |
| 421 | return ACTION_CREATE_NEW_TABLE; |
| 422 | else |
| 423 | return ACTION_WRITE_BLOCK_ENTRY; |
| 424 | |
| 425 | } else { |
| 426 | /* |
| 427 | * There's another region mapped here, don't |
| 428 | * overwrite. |
| 429 | */ |
| 430 | assert(desc_type == BLOCK_DESC); |
| 431 | |
| 432 | return ACTION_NONE; |
| 433 | } |
| 434 | } |
| 435 | |
| 436 | } else if ((mm->base_va <= table_entry_end_va) || |
| 437 | (mm_end_va >= table_entry_base_va)) { |
| 438 | |
| 439 | /* |
| 440 | * Region partially covers table entry |
| 441 | * ----------------------------------- |
| 442 | * |
| 443 | * This means that this table entry can't describe the whole |
| 444 | * translation, a finer table is needed. |
| 445 | |
| 446 | * There cannot be partial block overlaps in level 3. If that |
| 447 | * happens, some of the preliminary checks when adding the |
| 448 | * mmap region failed to detect that PA and VA must at least be |
| 449 | * aligned to PAGE_SIZE. |
| 450 | */ |
| 451 | assert(level < 3); |
| 452 | |
| 453 | if (desc_type == INVALID_DESC) { |
| 454 | /* |
| 455 | * The block is not fully covered by the region. Create |
| 456 | * a new table, recurse into it and try to map the |
| 457 | * region with finer granularity. |
| 458 | */ |
| 459 | return ACTION_CREATE_NEW_TABLE; |
| 460 | |
| 461 | } else { |
| 462 | assert(desc_type == TABLE_DESC); |
| 463 | /* |
| 464 | * The block is not fully covered by the region, but |
| 465 | * there is already a table here. Recurse into it and |
| 466 | * try to map with finer granularity. |
| 467 | * |
| 468 | * PAGE_DESC for level 3 has the same value as |
| 469 | * TABLE_DESC, but this code can't run on a level 3 |
| 470 | * table because there can't be overlaps in level 3. |
| 471 | */ |
| 472 | return ACTION_RECURSE_INTO_TABLE; |
| 473 | } |
| 474 | } |
| 475 | |
| 476 | /* |
| 477 | * This table entry is outside of the region specified in the arguments, |
| 478 | * don't write anything to it. |
| 479 | */ |
| 480 | return ACTION_NONE; |
| 481 | } |
| 482 | |
| 483 | /* |
| 484 | * Recursive function that writes to the translation tables and maps the |
Antonio Nino Diaz | 0b64f4e | 2017-02-27 17:23:54 +0000 | [diff] [blame] | 485 | * specified region. On success, it returns the VA of the last byte that was |
| 486 | * succesfully mapped. On error, it returns the VA of the next entry that |
| 487 | * should have been mapped. |
Antonio Nino Diaz | 7bb01fb | 2017-03-08 14:40:23 +0000 | [diff] [blame] | 488 | */ |
Antonio Nino Diaz | 0b64f4e | 2017-02-27 17:23:54 +0000 | [diff] [blame] | 489 | static uintptr_t xlat_tables_map_region(xlat_ctx_t *ctx, mmap_region_t *mm, |
Antonio Nino Diaz | 7bb01fb | 2017-03-08 14:40:23 +0000 | [diff] [blame] | 490 | const uintptr_t table_base_va, |
| 491 | uint64_t *const table_base, |
| 492 | const int table_entries, |
Varun Wadekar | 6311f63 | 2017-06-07 09:57:42 -0700 | [diff] [blame] | 493 | const unsigned int level) |
Antonio Nino Diaz | 7bb01fb | 2017-03-08 14:40:23 +0000 | [diff] [blame] | 494 | { |
| 495 | assert(level >= ctx->base_level && level <= XLAT_TABLE_LEVEL_MAX); |
| 496 | |
| 497 | uintptr_t mm_end_va = mm->base_va + mm->size - 1; |
| 498 | |
| 499 | uintptr_t table_idx_va; |
| 500 | unsigned long long table_idx_pa; |
| 501 | |
| 502 | uint64_t *subtable; |
| 503 | uint64_t desc; |
| 504 | |
| 505 | int table_idx; |
| 506 | |
| 507 | if (mm->base_va > table_base_va) { |
| 508 | /* Find the first index of the table affected by the region. */ |
| 509 | table_idx_va = mm->base_va & ~XLAT_BLOCK_MASK(level); |
| 510 | |
| 511 | table_idx = (table_idx_va - table_base_va) >> |
| 512 | XLAT_ADDR_SHIFT(level); |
| 513 | |
| 514 | assert(table_idx < table_entries); |
| 515 | } else { |
| 516 | /* Start from the beginning of the table. */ |
| 517 | table_idx_va = table_base_va; |
| 518 | table_idx = 0; |
| 519 | } |
| 520 | |
Antonio Nino Diaz | 0b64f4e | 2017-02-27 17:23:54 +0000 | [diff] [blame] | 521 | #if PLAT_XLAT_TABLES_DYNAMIC |
| 522 | if (level > ctx->base_level) |
| 523 | xlat_table_inc_regions_count(ctx, table_base); |
| 524 | #endif |
| 525 | |
Antonio Nino Diaz | 7bb01fb | 2017-03-08 14:40:23 +0000 | [diff] [blame] | 526 | while (table_idx < table_entries) { |
| 527 | |
| 528 | desc = table_base[table_idx]; |
| 529 | |
| 530 | table_idx_pa = mm->base_pa + table_idx_va - mm->base_va; |
| 531 | |
| 532 | action_t action = xlat_tables_map_region_action(mm, |
| 533 | desc & DESC_MASK, table_idx_pa, table_idx_va, level); |
| 534 | |
| 535 | if (action == ACTION_WRITE_BLOCK_ENTRY) { |
| 536 | |
| 537 | table_base[table_idx] = |
Antonio Nino Diaz | a564025 | 2017-04-27 13:30:22 +0100 | [diff] [blame] | 538 | xlat_desc(mm->attr, table_idx_pa, level, |
| 539 | ctx->execute_never_mask); |
Antonio Nino Diaz | 7bb01fb | 2017-03-08 14:40:23 +0000 | [diff] [blame] | 540 | |
| 541 | } else if (action == ACTION_CREATE_NEW_TABLE) { |
| 542 | |
| 543 | subtable = xlat_table_get_empty(ctx); |
Antonio Nino Diaz | 0b64f4e | 2017-02-27 17:23:54 +0000 | [diff] [blame] | 544 | if (subtable == NULL) { |
| 545 | /* Not enough free tables to map this region */ |
| 546 | return table_idx_va; |
| 547 | } |
| 548 | |
Antonio Nino Diaz | 7bb01fb | 2017-03-08 14:40:23 +0000 | [diff] [blame] | 549 | /* Point to new subtable from this one. */ |
Antonio Nino Diaz | 0b64f4e | 2017-02-27 17:23:54 +0000 | [diff] [blame] | 550 | table_base[table_idx] = TABLE_DESC | (unsigned long)subtable; |
| 551 | |
| 552 | /* Recurse to write into subtable */ |
| 553 | uintptr_t end_va = xlat_tables_map_region(ctx, mm, table_idx_va, |
| 554 | subtable, XLAT_TABLE_ENTRIES, |
| 555 | level + 1); |
| 556 | if (end_va != table_idx_va + XLAT_BLOCK_SIZE(level) - 1) |
| 557 | return end_va; |
Antonio Nino Diaz | 7bb01fb | 2017-03-08 14:40:23 +0000 | [diff] [blame] | 558 | |
| 559 | } else if (action == ACTION_RECURSE_INTO_TABLE) { |
| 560 | |
| 561 | subtable = (uint64_t *)(uintptr_t)(desc & TABLE_ADDR_MASK); |
| 562 | /* Recurse to write into subtable */ |
Antonio Nino Diaz | 0b64f4e | 2017-02-27 17:23:54 +0000 | [diff] [blame] | 563 | uintptr_t end_va = xlat_tables_map_region(ctx, mm, table_idx_va, |
| 564 | subtable, XLAT_TABLE_ENTRIES, |
| 565 | level + 1); |
| 566 | if (end_va != table_idx_va + XLAT_BLOCK_SIZE(level) - 1) |
| 567 | return end_va; |
Antonio Nino Diaz | 7bb01fb | 2017-03-08 14:40:23 +0000 | [diff] [blame] | 568 | |
| 569 | } else { |
| 570 | |
| 571 | assert(action == ACTION_NONE); |
| 572 | |
| 573 | } |
| 574 | |
| 575 | table_idx++; |
| 576 | table_idx_va += XLAT_BLOCK_SIZE(level); |
| 577 | |
| 578 | /* If reached the end of the region, exit */ |
| 579 | if (mm_end_va <= table_idx_va) |
| 580 | break; |
| 581 | } |
Antonio Nino Diaz | 0b64f4e | 2017-02-27 17:23:54 +0000 | [diff] [blame] | 582 | |
| 583 | return table_idx_va - 1; |
Antonio Nino Diaz | 7bb01fb | 2017-03-08 14:40:23 +0000 | [diff] [blame] | 584 | } |
| 585 | |
| 586 | void print_mmap(mmap_region_t *const mmap) |
| 587 | { |
| 588 | #if LOG_LEVEL >= LOG_LEVEL_VERBOSE |
| 589 | tf_printf("mmap:\n"); |
| 590 | mmap_region_t *mm = mmap; |
| 591 | |
| 592 | while (mm->size) { |
| 593 | tf_printf(" VA:%p PA:0x%llx size:0x%zx attr:0x%x\n", |
| 594 | (void *)mm->base_va, mm->base_pa, |
| 595 | mm->size, mm->attr); |
| 596 | ++mm; |
| 597 | }; |
| 598 | tf_printf("\n"); |
| 599 | #endif |
| 600 | } |
| 601 | |
| 602 | /* |
| 603 | * Function that verifies that a region can be mapped. |
| 604 | * Returns: |
| 605 | * 0: Success, the mapping is allowed. |
| 606 | * EINVAL: Invalid values were used as arguments. |
| 607 | * ERANGE: The memory limits were surpassed. |
| 608 | * ENOMEM: There is not enough memory in the mmap array. |
| 609 | * EPERM: Region overlaps another one in an invalid way. |
| 610 | */ |
| 611 | static int mmap_add_region_check(xlat_ctx_t *ctx, unsigned long long base_pa, |
| 612 | uintptr_t base_va, size_t size, |
Sandrine Bailleux | 28fa2e9 | 2017-04-19 14:02:23 +0100 | [diff] [blame] | 613 | mmap_attr_t attr) |
Antonio Nino Diaz | 7bb01fb | 2017-03-08 14:40:23 +0000 | [diff] [blame] | 614 | { |
| 615 | mmap_region_t *mm = ctx->mmap; |
| 616 | unsigned long long end_pa = base_pa + size - 1; |
| 617 | uintptr_t end_va = base_va + size - 1; |
| 618 | |
| 619 | if (!IS_PAGE_ALIGNED(base_pa) || !IS_PAGE_ALIGNED(base_va) || |
| 620 | !IS_PAGE_ALIGNED(size)) |
| 621 | return -EINVAL; |
| 622 | |
| 623 | /* Check for overflows */ |
| 624 | if ((base_pa > end_pa) || (base_va > end_va)) |
| 625 | return -ERANGE; |
| 626 | |
| 627 | if ((base_va + (uintptr_t)size - (uintptr_t)1) > ctx->va_max_address) |
| 628 | return -ERANGE; |
| 629 | |
| 630 | if ((base_pa + (unsigned long long)size - 1ULL) > ctx->pa_max_address) |
| 631 | return -ERANGE; |
| 632 | |
| 633 | /* Check that there is space in the mmap array */ |
| 634 | if (ctx->mmap[ctx->mmap_num - 1].size != 0) |
| 635 | return -ENOMEM; |
| 636 | |
| 637 | /* Check for PAs and VAs overlaps with all other regions */ |
| 638 | for (mm = ctx->mmap; mm->size; ++mm) { |
| 639 | |
| 640 | uintptr_t mm_end_va = mm->base_va + mm->size - 1; |
| 641 | |
| 642 | /* |
| 643 | * Check if one of the regions is completely inside the other |
| 644 | * one. |
| 645 | */ |
| 646 | int fully_overlapped_va = |
| 647 | ((base_va >= mm->base_va) && (end_va <= mm_end_va)) || |
| 648 | ((mm->base_va >= base_va) && (mm_end_va <= end_va)); |
| 649 | |
| 650 | /* |
| 651 | * Full VA overlaps are only allowed if both regions are |
| 652 | * identity mapped (zero offset) or have the same VA to PA |
| 653 | * offset. Also, make sure that it's not the exact same area. |
Antonio Nino Diaz | 0b64f4e | 2017-02-27 17:23:54 +0000 | [diff] [blame] | 654 | * This can only be done with static regions. |
Antonio Nino Diaz | 7bb01fb | 2017-03-08 14:40:23 +0000 | [diff] [blame] | 655 | */ |
| 656 | if (fully_overlapped_va) { |
| 657 | |
Antonio Nino Diaz | 0b64f4e | 2017-02-27 17:23:54 +0000 | [diff] [blame] | 658 | #if PLAT_XLAT_TABLES_DYNAMIC |
| 659 | if ((attr & MT_DYNAMIC) || (mm->attr & MT_DYNAMIC)) |
| 660 | return -EPERM; |
| 661 | #endif /* PLAT_XLAT_TABLES_DYNAMIC */ |
Antonio Nino Diaz | 7bb01fb | 2017-03-08 14:40:23 +0000 | [diff] [blame] | 662 | if ((mm->base_va - mm->base_pa) != (base_va - base_pa)) |
| 663 | return -EPERM; |
| 664 | |
| 665 | if ((base_va == mm->base_va) && (size == mm->size)) |
| 666 | return -EPERM; |
| 667 | |
| 668 | } else { |
| 669 | /* |
| 670 | * If the regions do not have fully overlapping VAs, |
| 671 | * then they must have fully separated VAs and PAs. |
| 672 | * Partial overlaps are not allowed |
| 673 | */ |
| 674 | |
| 675 | unsigned long long mm_end_pa = |
| 676 | mm->base_pa + mm->size - 1; |
| 677 | |
| 678 | int separated_pa = |
| 679 | (end_pa < mm->base_pa) || (base_pa > mm_end_pa); |
| 680 | int separated_va = |
| 681 | (end_va < mm->base_va) || (base_va > mm_end_va); |
| 682 | |
| 683 | if (!(separated_va && separated_pa)) |
| 684 | return -EPERM; |
| 685 | } |
| 686 | } |
| 687 | |
| 688 | return 0; |
| 689 | } |
| 690 | |
Sandrine Bailleux | a9ad848 | 2017-07-18 13:26:36 +0100 | [diff] [blame] | 691 | void mmap_add_region_ctx(xlat_ctx_t *ctx, const mmap_region_t *mm) |
Antonio Nino Diaz | 7bb01fb | 2017-03-08 14:40:23 +0000 | [diff] [blame] | 692 | { |
| 693 | mmap_region_t *mm_cursor = ctx->mmap; |
| 694 | mmap_region_t *mm_last = mm_cursor + ctx->mmap_num; |
| 695 | unsigned long long end_pa = mm->base_pa + mm->size - 1; |
| 696 | uintptr_t end_va = mm->base_va + mm->size - 1; |
| 697 | int ret; |
| 698 | |
| 699 | /* Ignore empty regions */ |
| 700 | if (!mm->size) |
| 701 | return; |
| 702 | |
Antonio Nino Diaz | 0b64f4e | 2017-02-27 17:23:54 +0000 | [diff] [blame] | 703 | /* Static regions must be added before initializing the xlat tables. */ |
| 704 | assert(!ctx->initialized); |
| 705 | |
Antonio Nino Diaz | 7bb01fb | 2017-03-08 14:40:23 +0000 | [diff] [blame] | 706 | ret = mmap_add_region_check(ctx, mm->base_pa, mm->base_va, mm->size, |
| 707 | mm->attr); |
| 708 | if (ret != 0) { |
| 709 | ERROR("mmap_add_region_check() failed. error %d\n", ret); |
| 710 | assert(0); |
| 711 | return; |
| 712 | } |
| 713 | |
| 714 | /* |
| 715 | * Find correct place in mmap to insert new region. |
| 716 | * |
| 717 | * 1 - Lower region VA end first. |
| 718 | * 2 - Smaller region size first. |
| 719 | * |
| 720 | * VA 0 0xFF |
| 721 | * |
| 722 | * 1st |------| |
| 723 | * 2nd |------------| |
| 724 | * 3rd |------| |
| 725 | * 4th |---| |
| 726 | * 5th |---| |
| 727 | * 6th |----------| |
| 728 | * 7th |-------------------------------------| |
| 729 | * |
| 730 | * This is required for overlapping regions only. It simplifies adding |
| 731 | * regions with the loop in xlat_tables_init_internal because the outer |
| 732 | * ones won't overwrite block or page descriptors of regions added |
| 733 | * previously. |
Antonio Nino Diaz | 0b64f4e | 2017-02-27 17:23:54 +0000 | [diff] [blame] | 734 | * |
| 735 | * Overlapping is only allowed for static regions. |
Antonio Nino Diaz | 7bb01fb | 2017-03-08 14:40:23 +0000 | [diff] [blame] | 736 | */ |
| 737 | |
| 738 | while ((mm_cursor->base_va + mm_cursor->size - 1) < end_va |
| 739 | && mm_cursor->size) |
| 740 | ++mm_cursor; |
| 741 | |
| 742 | while ((mm_cursor->base_va + mm_cursor->size - 1 == end_va) |
| 743 | && (mm_cursor->size < mm->size)) |
| 744 | ++mm_cursor; |
| 745 | |
| 746 | /* Make room for new region by moving other regions up by one place */ |
| 747 | memmove(mm_cursor + 1, mm_cursor, |
| 748 | (uintptr_t)mm_last - (uintptr_t)mm_cursor); |
| 749 | |
| 750 | /* |
| 751 | * Check we haven't lost the empty sentinel from the end of the array. |
| 752 | * This shouldn't happen as we have checked in mmap_add_region_check |
| 753 | * that there is free space. |
| 754 | */ |
| 755 | assert(mm_last->size == 0); |
| 756 | |
| 757 | mm_cursor->base_pa = mm->base_pa; |
| 758 | mm_cursor->base_va = mm->base_va; |
| 759 | mm_cursor->size = mm->size; |
| 760 | mm_cursor->attr = mm->attr; |
| 761 | |
| 762 | if (end_pa > ctx->max_pa) |
| 763 | ctx->max_pa = end_pa; |
| 764 | if (end_va > ctx->max_va) |
| 765 | ctx->max_va = end_va; |
| 766 | } |
| 767 | |
Sandrine Bailleux | a9ad848 | 2017-07-18 13:26:36 +0100 | [diff] [blame] | 768 | void mmap_add_region(unsigned long long base_pa, |
| 769 | uintptr_t base_va, |
| 770 | size_t size, |
| 771 | mmap_attr_t attr) |
| 772 | { |
| 773 | mmap_region_t mm = { |
| 774 | .base_va = base_va, |
| 775 | .base_pa = base_pa, |
| 776 | .size = size, |
| 777 | .attr = attr, |
| 778 | }; |
| 779 | mmap_add_region_ctx(&tf_xlat_ctx, &mm); |
| 780 | } |
| 781 | |
| 782 | |
| 783 | void mmap_add_ctx(xlat_ctx_t *ctx, const mmap_region_t *mm) |
| 784 | { |
| 785 | while (mm->size) { |
| 786 | mmap_add_region_ctx(ctx, mm); |
| 787 | mm++; |
| 788 | } |
| 789 | } |
| 790 | |
| 791 | void mmap_add(const mmap_region_t *mm) |
| 792 | { |
| 793 | mmap_add_ctx(&tf_xlat_ctx, mm); |
| 794 | } |
| 795 | |
Antonio Nino Diaz | 0b64f4e | 2017-02-27 17:23:54 +0000 | [diff] [blame] | 796 | #if PLAT_XLAT_TABLES_DYNAMIC |
| 797 | |
| 798 | int mmap_add_dynamic_region_ctx(xlat_ctx_t *ctx, mmap_region_t *mm) |
| 799 | { |
| 800 | mmap_region_t *mm_cursor = ctx->mmap; |
| 801 | mmap_region_t *mm_last = mm_cursor + ctx->mmap_num; |
| 802 | unsigned long long end_pa = mm->base_pa + mm->size - 1; |
| 803 | uintptr_t end_va = mm->base_va + mm->size - 1; |
| 804 | int ret; |
| 805 | |
| 806 | /* Nothing to do */ |
| 807 | if (!mm->size) |
| 808 | return 0; |
| 809 | |
| 810 | ret = mmap_add_region_check(ctx, mm->base_pa, mm->base_va, mm->size, mm->attr | MT_DYNAMIC); |
| 811 | if (ret != 0) |
| 812 | return ret; |
| 813 | |
| 814 | /* |
| 815 | * Find the adequate entry in the mmap array in the same way done for |
| 816 | * static regions in mmap_add_region_ctx(). |
| 817 | */ |
| 818 | |
| 819 | while ((mm_cursor->base_va + mm_cursor->size - 1) < end_va && mm_cursor->size) |
| 820 | ++mm_cursor; |
| 821 | |
| 822 | while ((mm_cursor->base_va + mm_cursor->size - 1 == end_va) && (mm_cursor->size < mm->size)) |
| 823 | ++mm_cursor; |
| 824 | |
| 825 | /* Make room for new region by moving other regions up by one place */ |
| 826 | memmove(mm_cursor + 1, mm_cursor, (uintptr_t)mm_last - (uintptr_t)mm_cursor); |
| 827 | |
| 828 | /* |
| 829 | * Check we haven't lost the empty sentinal from the end of the array. |
| 830 | * This shouldn't happen as we have checked in mmap_add_region_check |
| 831 | * that there is free space. |
| 832 | */ |
| 833 | assert(mm_last->size == 0); |
| 834 | |
| 835 | mm_cursor->base_pa = mm->base_pa; |
| 836 | mm_cursor->base_va = mm->base_va; |
| 837 | mm_cursor->size = mm->size; |
| 838 | mm_cursor->attr = mm->attr | MT_DYNAMIC; |
| 839 | |
| 840 | /* |
| 841 | * Update the translation tables if the xlat tables are initialized. If |
| 842 | * not, this region will be mapped when they are initialized. |
| 843 | */ |
| 844 | if (ctx->initialized) { |
| 845 | uintptr_t end_va = xlat_tables_map_region(ctx, mm_cursor, 0, ctx->base_table, |
| 846 | ctx->base_table_entries, ctx->base_level); |
| 847 | |
| 848 | /* Failed to map, remove mmap entry, unmap and return error. */ |
| 849 | if (end_va != mm_cursor->base_va + mm_cursor->size - 1) { |
| 850 | memmove(mm_cursor, mm_cursor + 1, (uintptr_t)mm_last - (uintptr_t)mm_cursor); |
| 851 | |
| 852 | /* |
| 853 | * Check if the mapping function actually managed to map |
| 854 | * anything. If not, just return now. |
| 855 | */ |
| 856 | if (mm_cursor->base_va >= end_va) |
| 857 | return -ENOMEM; |
| 858 | |
| 859 | /* |
| 860 | * Something went wrong after mapping some table entries, |
| 861 | * undo every change done up to this point. |
| 862 | */ |
| 863 | mmap_region_t unmap_mm = { |
| 864 | .base_pa = 0, |
| 865 | .base_va = mm->base_va, |
| 866 | .size = end_va - mm->base_va, |
| 867 | .attr = 0 |
| 868 | }; |
| 869 | xlat_tables_unmap_region(ctx, &unmap_mm, 0, ctx->base_table, |
| 870 | ctx->base_table_entries, ctx->base_level); |
| 871 | |
| 872 | return -ENOMEM; |
| 873 | } |
| 874 | |
| 875 | /* |
| 876 | * Make sure that all entries are written to the memory. There |
| 877 | * is no need to invalidate entries when mapping dynamic regions |
| 878 | * because new table/block/page descriptors only replace old |
| 879 | * invalid descriptors, that aren't TLB cached. |
| 880 | */ |
| 881 | dsbishst(); |
| 882 | } |
| 883 | |
| 884 | if (end_pa > ctx->max_pa) |
| 885 | ctx->max_pa = end_pa; |
| 886 | if (end_va > ctx->max_va) |
| 887 | ctx->max_va = end_va; |
| 888 | |
| 889 | return 0; |
| 890 | } |
| 891 | |
Sandrine Bailleux | a9ad848 | 2017-07-18 13:26:36 +0100 | [diff] [blame] | 892 | int mmap_add_dynamic_region(unsigned long long base_pa, |
| 893 | uintptr_t base_va, size_t size, mmap_attr_t attr) |
| 894 | { |
| 895 | mmap_region_t mm = { |
| 896 | .base_va = base_va, |
| 897 | .base_pa = base_pa, |
| 898 | .size = size, |
| 899 | .attr = attr, |
| 900 | }; |
| 901 | return mmap_add_dynamic_region_ctx(&tf_xlat_ctx, &mm); |
| 902 | } |
| 903 | |
Antonio Nino Diaz | 0b64f4e | 2017-02-27 17:23:54 +0000 | [diff] [blame] | 904 | /* |
| 905 | * Removes the region with given base Virtual Address and size from the given |
| 906 | * context. |
| 907 | * |
| 908 | * Returns: |
| 909 | * 0: Success. |
| 910 | * EINVAL: Invalid values were used as arguments (region not found). |
| 911 | * EPERM: Tried to remove a static region. |
| 912 | */ |
| 913 | int mmap_remove_dynamic_region_ctx(xlat_ctx_t *ctx, uintptr_t base_va, |
| 914 | size_t size) |
| 915 | { |
| 916 | mmap_region_t *mm = ctx->mmap; |
| 917 | mmap_region_t *mm_last = mm + ctx->mmap_num; |
| 918 | int update_max_va_needed = 0; |
| 919 | int update_max_pa_needed = 0; |
| 920 | |
| 921 | /* Check sanity of mmap array. */ |
| 922 | assert(mm[ctx->mmap_num].size == 0); |
| 923 | |
| 924 | while (mm->size) { |
| 925 | if ((mm->base_va == base_va) && (mm->size == size)) |
| 926 | break; |
| 927 | ++mm; |
| 928 | } |
| 929 | |
| 930 | /* Check that the region was found */ |
| 931 | if (mm->size == 0) |
| 932 | return -EINVAL; |
| 933 | |
| 934 | /* If the region is static it can't be removed */ |
| 935 | if (!(mm->attr & MT_DYNAMIC)) |
| 936 | return -EPERM; |
| 937 | |
| 938 | /* Check if this region is using the top VAs or PAs. */ |
| 939 | if ((mm->base_va + mm->size - 1) == ctx->max_va) |
| 940 | update_max_va_needed = 1; |
| 941 | if ((mm->base_pa + mm->size - 1) == ctx->max_pa) |
| 942 | update_max_pa_needed = 1; |
| 943 | |
| 944 | /* Update the translation tables if needed */ |
| 945 | if (ctx->initialized) { |
| 946 | xlat_tables_unmap_region(ctx, mm, 0, ctx->base_table, |
| 947 | ctx->base_table_entries, |
| 948 | ctx->base_level); |
| 949 | xlat_arch_tlbi_va_sync(); |
| 950 | } |
| 951 | |
| 952 | /* Remove this region by moving the rest down by one place. */ |
| 953 | memmove(mm, mm + 1, (uintptr_t)mm_last - (uintptr_t)mm); |
| 954 | |
| 955 | /* Check if we need to update the max VAs and PAs */ |
| 956 | if (update_max_va_needed) { |
| 957 | ctx->max_va = 0; |
| 958 | mm = ctx->mmap; |
| 959 | while (mm->size) { |
| 960 | if ((mm->base_va + mm->size - 1) > ctx->max_va) |
| 961 | ctx->max_va = mm->base_va + mm->size - 1; |
| 962 | ++mm; |
| 963 | } |
| 964 | } |
| 965 | |
| 966 | if (update_max_pa_needed) { |
| 967 | ctx->max_pa = 0; |
| 968 | mm = ctx->mmap; |
| 969 | while (mm->size) { |
| 970 | if ((mm->base_pa + mm->size - 1) > ctx->max_pa) |
| 971 | ctx->max_pa = mm->base_pa + mm->size - 1; |
| 972 | ++mm; |
| 973 | } |
| 974 | } |
| 975 | |
| 976 | return 0; |
| 977 | } |
| 978 | |
Sandrine Bailleux | a9ad848 | 2017-07-18 13:26:36 +0100 | [diff] [blame] | 979 | int mmap_remove_dynamic_region(uintptr_t base_va, size_t size) |
| 980 | { |
| 981 | return mmap_remove_dynamic_region_ctx(&tf_xlat_ctx, |
| 982 | base_va, size); |
| 983 | } |
| 984 | |
Antonio Nino Diaz | 0b64f4e | 2017-02-27 17:23:54 +0000 | [diff] [blame] | 985 | #endif /* PLAT_XLAT_TABLES_DYNAMIC */ |
| 986 | |
Antonio Nino Diaz | 7bb01fb | 2017-03-08 14:40:23 +0000 | [diff] [blame] | 987 | #if LOG_LEVEL >= LOG_LEVEL_VERBOSE |
| 988 | |
| 989 | /* Print the attributes of the specified block descriptor. */ |
Antonio Nino Diaz | a564025 | 2017-04-27 13:30:22 +0100 | [diff] [blame] | 990 | static void xlat_desc_print(uint64_t desc, uint64_t execute_never_mask) |
Antonio Nino Diaz | 7bb01fb | 2017-03-08 14:40:23 +0000 | [diff] [blame] | 991 | { |
| 992 | int mem_type_index = ATTR_INDEX_GET(desc); |
| 993 | |
| 994 | if (mem_type_index == ATTR_IWBWA_OWBWA_NTR_INDEX) { |
| 995 | tf_printf("MEM"); |
| 996 | } else if (mem_type_index == ATTR_NON_CACHEABLE_INDEX) { |
| 997 | tf_printf("NC"); |
| 998 | } else { |
| 999 | assert(mem_type_index == ATTR_DEVICE_INDEX); |
| 1000 | tf_printf("DEV"); |
| 1001 | } |
| 1002 | |
| 1003 | tf_printf(LOWER_ATTRS(AP_RO) & desc ? "-RO" : "-RW"); |
| 1004 | tf_printf(LOWER_ATTRS(NS) & desc ? "-NS" : "-S"); |
Antonio Nino Diaz | a564025 | 2017-04-27 13:30:22 +0100 | [diff] [blame] | 1005 | tf_printf(execute_never_mask & desc ? "-XN" : "-EXEC"); |
Antonio Nino Diaz | 7bb01fb | 2017-03-08 14:40:23 +0000 | [diff] [blame] | 1006 | } |
| 1007 | |
| 1008 | static const char * const level_spacers[] = { |
Antonio Nino Diaz | f10644c | 2017-02-13 11:35:49 +0000 | [diff] [blame] | 1009 | "[LV0] ", |
| 1010 | " [LV1] ", |
| 1011 | " [LV2] ", |
| 1012 | " [LV3] " |
Antonio Nino Diaz | 7bb01fb | 2017-03-08 14:40:23 +0000 | [diff] [blame] | 1013 | }; |
| 1014 | |
Antonio Nino Diaz | f10644c | 2017-02-13 11:35:49 +0000 | [diff] [blame] | 1015 | static const char *invalid_descriptors_ommited = |
| 1016 | "%s(%d invalid descriptors omitted)\n"; |
| 1017 | |
Antonio Nino Diaz | 7bb01fb | 2017-03-08 14:40:23 +0000 | [diff] [blame] | 1018 | /* |
| 1019 | * Recursive function that reads the translation tables passed as an argument |
| 1020 | * and prints their status. |
| 1021 | */ |
| 1022 | static void xlat_tables_print_internal(const uintptr_t table_base_va, |
| 1023 | uint64_t *const table_base, const int table_entries, |
Varun Wadekar | 2676f6a | 2017-06-16 14:15:34 -0700 | [diff] [blame] | 1024 | const unsigned int level, const uint64_t execute_never_mask) |
Antonio Nino Diaz | 7bb01fb | 2017-03-08 14:40:23 +0000 | [diff] [blame] | 1025 | { |
| 1026 | assert(level <= XLAT_TABLE_LEVEL_MAX); |
| 1027 | |
| 1028 | uint64_t desc; |
| 1029 | uintptr_t table_idx_va = table_base_va; |
| 1030 | int table_idx = 0; |
| 1031 | |
| 1032 | size_t level_size = XLAT_BLOCK_SIZE(level); |
| 1033 | |
Antonio Nino Diaz | f10644c | 2017-02-13 11:35:49 +0000 | [diff] [blame] | 1034 | /* |
| 1035 | * Keep track of how many invalid descriptors are counted in a row. |
| 1036 | * Whenever multiple invalid descriptors are found, only the first one |
| 1037 | * is printed, and a line is added to inform about how many descriptors |
| 1038 | * have been omitted. |
| 1039 | */ |
| 1040 | int invalid_row_count = 0; |
| 1041 | |
Antonio Nino Diaz | 7bb01fb | 2017-03-08 14:40:23 +0000 | [diff] [blame] | 1042 | while (table_idx < table_entries) { |
| 1043 | |
| 1044 | desc = table_base[table_idx]; |
| 1045 | |
| 1046 | if ((desc & DESC_MASK) == INVALID_DESC) { |
| 1047 | |
Antonio Nino Diaz | f10644c | 2017-02-13 11:35:49 +0000 | [diff] [blame] | 1048 | if (invalid_row_count == 0) { |
| 1049 | tf_printf("%sVA:%p size:0x%zx\n", |
| 1050 | level_spacers[level], |
| 1051 | (void *)table_idx_va, level_size); |
| 1052 | } |
| 1053 | invalid_row_count++; |
Antonio Nino Diaz | 7bb01fb | 2017-03-08 14:40:23 +0000 | [diff] [blame] | 1054 | |
| 1055 | } else { |
| 1056 | |
Antonio Nino Diaz | f10644c | 2017-02-13 11:35:49 +0000 | [diff] [blame] | 1057 | if (invalid_row_count > 1) { |
| 1058 | tf_printf(invalid_descriptors_ommited, |
| 1059 | level_spacers[level], |
| 1060 | invalid_row_count - 1); |
| 1061 | } |
| 1062 | invalid_row_count = 0; |
| 1063 | |
Antonio Nino Diaz | 7bb01fb | 2017-03-08 14:40:23 +0000 | [diff] [blame] | 1064 | /* |
| 1065 | * Check if this is a table or a block. Tables are only |
| 1066 | * allowed in levels other than 3, but DESC_PAGE has the |
| 1067 | * same value as DESC_TABLE, so we need to check. |
| 1068 | */ |
| 1069 | if (((desc & DESC_MASK) == TABLE_DESC) && |
| 1070 | (level < XLAT_TABLE_LEVEL_MAX)) { |
| 1071 | /* |
| 1072 | * Do not print any PA for a table descriptor, |
| 1073 | * as it doesn't directly map physical memory |
| 1074 | * but instead points to the next translation |
| 1075 | * table in the translation table walk. |
| 1076 | */ |
| 1077 | tf_printf("%sVA:%p size:0x%zx\n", |
| 1078 | level_spacers[level], |
| 1079 | (void *)table_idx_va, level_size); |
| 1080 | |
| 1081 | uintptr_t addr_inner = desc & TABLE_ADDR_MASK; |
| 1082 | |
| 1083 | xlat_tables_print_internal(table_idx_va, |
| 1084 | (uint64_t *)addr_inner, |
Antonio Nino Diaz | a564025 | 2017-04-27 13:30:22 +0100 | [diff] [blame] | 1085 | XLAT_TABLE_ENTRIES, level+1, |
| 1086 | execute_never_mask); |
Antonio Nino Diaz | 7bb01fb | 2017-03-08 14:40:23 +0000 | [diff] [blame] | 1087 | } else { |
| 1088 | tf_printf("%sVA:%p PA:0x%llx size:0x%zx ", |
| 1089 | level_spacers[level], |
| 1090 | (void *)table_idx_va, |
| 1091 | (unsigned long long)(desc & TABLE_ADDR_MASK), |
| 1092 | level_size); |
Antonio Nino Diaz | a564025 | 2017-04-27 13:30:22 +0100 | [diff] [blame] | 1093 | xlat_desc_print(desc, execute_never_mask); |
Antonio Nino Diaz | 7bb01fb | 2017-03-08 14:40:23 +0000 | [diff] [blame] | 1094 | tf_printf("\n"); |
| 1095 | } |
| 1096 | } |
| 1097 | |
| 1098 | table_idx++; |
| 1099 | table_idx_va += level_size; |
| 1100 | } |
Antonio Nino Diaz | f10644c | 2017-02-13 11:35:49 +0000 | [diff] [blame] | 1101 | |
| 1102 | if (invalid_row_count > 1) { |
| 1103 | tf_printf(invalid_descriptors_ommited, |
| 1104 | level_spacers[level], invalid_row_count - 1); |
| 1105 | } |
Antonio Nino Diaz | 7bb01fb | 2017-03-08 14:40:23 +0000 | [diff] [blame] | 1106 | } |
| 1107 | |
| 1108 | #endif /* LOG_LEVEL >= LOG_LEVEL_VERBOSE */ |
| 1109 | |
| 1110 | void xlat_tables_print(xlat_ctx_t *ctx) |
| 1111 | { |
| 1112 | #if LOG_LEVEL >= LOG_LEVEL_VERBOSE |
Sandrine Bailleux | 0350bc6 | 2017-05-26 15:47:08 +0100 | [diff] [blame] | 1113 | VERBOSE("Translation tables state:\n"); |
| 1114 | VERBOSE(" Max allowed PA: 0x%llx\n", ctx->pa_max_address); |
| 1115 | VERBOSE(" Max allowed VA: %p\n", (void *) ctx->va_max_address); |
| 1116 | VERBOSE(" Max mapped PA: 0x%llx\n", ctx->max_pa); |
| 1117 | VERBOSE(" Max mapped VA: %p\n", (void *) ctx->max_va); |
| 1118 | |
| 1119 | VERBOSE(" Initial lookup level: %i\n", ctx->base_level); |
| 1120 | VERBOSE(" Entries @initial lookup level: %i\n", |
| 1121 | ctx->base_table_entries); |
| 1122 | |
| 1123 | int used_page_tables; |
| 1124 | #if PLAT_XLAT_TABLES_DYNAMIC |
| 1125 | used_page_tables = 0; |
| 1126 | for (int i = 0; i < ctx->tables_num; ++i) { |
| 1127 | if (ctx->tables_mapped_regions[i] != 0) |
| 1128 | ++used_page_tables; |
| 1129 | } |
| 1130 | #else |
| 1131 | used_page_tables = ctx->next_table; |
| 1132 | #endif |
| 1133 | VERBOSE(" Used %i sub-tables out of %i (spare: %i)\n", |
| 1134 | used_page_tables, ctx->tables_num, |
| 1135 | ctx->tables_num - used_page_tables); |
| 1136 | |
Antonio Nino Diaz | 7bb01fb | 2017-03-08 14:40:23 +0000 | [diff] [blame] | 1137 | xlat_tables_print_internal(0, ctx->base_table, ctx->base_table_entries, |
Antonio Nino Diaz | a564025 | 2017-04-27 13:30:22 +0100 | [diff] [blame] | 1138 | ctx->base_level, ctx->execute_never_mask); |
Antonio Nino Diaz | 7bb01fb | 2017-03-08 14:40:23 +0000 | [diff] [blame] | 1139 | #endif /* LOG_LEVEL >= LOG_LEVEL_VERBOSE */ |
| 1140 | } |
| 1141 | |
Sandrine Bailleux | a9ad848 | 2017-07-18 13:26:36 +0100 | [diff] [blame] | 1142 | void init_xlat_tables_ctx(xlat_ctx_t *ctx) |
Antonio Nino Diaz | 7bb01fb | 2017-03-08 14:40:23 +0000 | [diff] [blame] | 1143 | { |
| 1144 | mmap_region_t *mm = ctx->mmap; |
| 1145 | |
Sandrine Bailleux | a9ad848 | 2017-07-18 13:26:36 +0100 | [diff] [blame] | 1146 | assert(!is_mmu_enabled()); |
| 1147 | assert(!ctx->initialized); |
| 1148 | |
| 1149 | print_mmap(mm); |
| 1150 | |
| 1151 | ctx->execute_never_mask = |
| 1152 | xlat_arch_get_xn_desc(xlat_arch_current_el()); |
| 1153 | |
Antonio Nino Diaz | 7bb01fb | 2017-03-08 14:40:23 +0000 | [diff] [blame] | 1154 | /* All tables must be zeroed before mapping any region. */ |
| 1155 | |
Varun Wadekar | 6311f63 | 2017-06-07 09:57:42 -0700 | [diff] [blame] | 1156 | for (unsigned int i = 0; i < ctx->base_table_entries; i++) |
Antonio Nino Diaz | 7bb01fb | 2017-03-08 14:40:23 +0000 | [diff] [blame] | 1157 | ctx->base_table[i] = INVALID_DESC; |
| 1158 | |
Varun Wadekar | 6311f63 | 2017-06-07 09:57:42 -0700 | [diff] [blame] | 1159 | for (unsigned int j = 0; j < ctx->tables_num; j++) { |
Antonio Nino Diaz | 0b64f4e | 2017-02-27 17:23:54 +0000 | [diff] [blame] | 1160 | #if PLAT_XLAT_TABLES_DYNAMIC |
| 1161 | ctx->tables_mapped_regions[j] = 0; |
| 1162 | #endif |
Varun Wadekar | 6311f63 | 2017-06-07 09:57:42 -0700 | [diff] [blame] | 1163 | for (unsigned int i = 0; i < XLAT_TABLE_ENTRIES; i++) |
Antonio Nino Diaz | 7bb01fb | 2017-03-08 14:40:23 +0000 | [diff] [blame] | 1164 | ctx->tables[j][i] = INVALID_DESC; |
| 1165 | } |
| 1166 | |
Antonio Nino Diaz | 0b64f4e | 2017-02-27 17:23:54 +0000 | [diff] [blame] | 1167 | while (mm->size) { |
| 1168 | uintptr_t end_va = xlat_tables_map_region(ctx, mm, 0, ctx->base_table, |
Antonio Nino Diaz | 7bb01fb | 2017-03-08 14:40:23 +0000 | [diff] [blame] | 1169 | ctx->base_table_entries, ctx->base_level); |
| 1170 | |
Antonio Nino Diaz | 0b64f4e | 2017-02-27 17:23:54 +0000 | [diff] [blame] | 1171 | if (end_va != mm->base_va + mm->size - 1) { |
| 1172 | ERROR("Not enough memory to map region:\n" |
| 1173 | " VA:%p PA:0x%llx size:0x%zx attr:0x%x\n", |
| 1174 | (void *)mm->base_va, mm->base_pa, mm->size, mm->attr); |
| 1175 | panic(); |
| 1176 | } |
| 1177 | |
| 1178 | mm++; |
| 1179 | } |
| 1180 | |
Sandrine Bailleux | 347621b | 2017-07-11 15:11:10 +0100 | [diff] [blame] | 1181 | assert(ctx->pa_max_address <= xlat_arch_get_max_supported_pa()); |
Sandrine Bailleux | a9ad848 | 2017-07-18 13:26:36 +0100 | [diff] [blame] | 1182 | assert(ctx->max_va <= ctx->va_max_address); |
| 1183 | assert(ctx->max_pa <= ctx->pa_max_address); |
| 1184 | |
Sandrine Bailleux | 99f6079 | 2017-05-31 13:31:48 +0100 | [diff] [blame] | 1185 | ctx->initialized = 1; |
| 1186 | |
| 1187 | xlat_tables_print(ctx); |
Antonio Nino Diaz | 7bb01fb | 2017-03-08 14:40:23 +0000 | [diff] [blame] | 1188 | } |
Sandrine Bailleux | a9ad848 | 2017-07-18 13:26:36 +0100 | [diff] [blame] | 1189 | |
| 1190 | void init_xlat_tables(void) |
| 1191 | { |
| 1192 | init_xlat_tables_ctx(&tf_xlat_ctx); |
| 1193 | } |
| 1194 | |
Sandrine Bailleux | 99f6079 | 2017-05-31 13:31:48 +0100 | [diff] [blame] | 1195 | /* |
| 1196 | * If dynamic allocation of new regions is disabled then by the time we call the |
| 1197 | * function enabling the MMU, we'll have registered all the memory regions to |
| 1198 | * map for the system's lifetime. Therefore, at this point we know the maximum |
| 1199 | * physical address that will ever be mapped. |
| 1200 | * |
| 1201 | * If dynamic allocation is enabled then we can't make any such assumption |
| 1202 | * because the maximum physical address could get pushed while adding a new |
| 1203 | * region. Therefore, in this case we have to assume that the whole address |
| 1204 | * space size might be mapped. |
| 1205 | */ |
| 1206 | #ifdef PLAT_XLAT_TABLES_DYNAMIC |
Sandrine Bailleux | 347621b | 2017-07-11 15:11:10 +0100 | [diff] [blame] | 1207 | #define MAX_PHYS_ADDR tf_xlat_ctx.pa_max_address |
Sandrine Bailleux | 99f6079 | 2017-05-31 13:31:48 +0100 | [diff] [blame] | 1208 | #else |
| 1209 | #define MAX_PHYS_ADDR tf_xlat_ctx.max_pa |
| 1210 | #endif |
| 1211 | |
Sandrine Bailleux | a9ad848 | 2017-07-18 13:26:36 +0100 | [diff] [blame] | 1212 | #ifdef AARCH32 |
| 1213 | |
| 1214 | void enable_mmu_secure(unsigned int flags) |
| 1215 | { |
Sandrine Bailleux | 347621b | 2017-07-11 15:11:10 +0100 | [diff] [blame] | 1216 | enable_mmu_arch(flags, tf_xlat_ctx.base_table, MAX_PHYS_ADDR, |
| 1217 | tf_xlat_ctx.va_max_address); |
Sandrine Bailleux | a9ad848 | 2017-07-18 13:26:36 +0100 | [diff] [blame] | 1218 | } |
| 1219 | |
| 1220 | #else |
| 1221 | |
| 1222 | void enable_mmu_el1(unsigned int flags) |
| 1223 | { |
Sandrine Bailleux | 347621b | 2017-07-11 15:11:10 +0100 | [diff] [blame] | 1224 | enable_mmu_arch(flags, tf_xlat_ctx.base_table, MAX_PHYS_ADDR, |
| 1225 | tf_xlat_ctx.va_max_address); |
Sandrine Bailleux | a9ad848 | 2017-07-18 13:26:36 +0100 | [diff] [blame] | 1226 | } |
| 1227 | |
| 1228 | void enable_mmu_el3(unsigned int flags) |
| 1229 | { |
Sandrine Bailleux | 347621b | 2017-07-11 15:11:10 +0100 | [diff] [blame] | 1230 | enable_mmu_arch(flags, tf_xlat_ctx.base_table, MAX_PHYS_ADDR, |
| 1231 | tf_xlat_ctx.va_max_address); |
Sandrine Bailleux | a9ad848 | 2017-07-18 13:26:36 +0100 | [diff] [blame] | 1232 | } |
| 1233 | |
| 1234 | #endif /* AARCH32 */ |