1 /* SPDX-License-Identifier: GPL-2.0-or-later */ 2 #ifndef _LINUX_MEMBLOCK_H 3 #define _LINUX_MEMBLOCK_H 4 5 /* 6 * Logical memory blocks. 7 * 8 * Copyright (C) 2001 Peter Bergner, IBM Corp. 9 */ 10 11 #include <linux/init.h> 12 #include <linux/mm.h> 13 #include <asm/dma.h> 14 15 extern unsigned long max_low_pfn; 16 extern unsigned long min_low_pfn; 17 18 /* 19 * highest page 20 */ 21 extern unsigned long max_pfn; 22 /* 23 * highest possible page 24 */ 25 extern unsigned long long max_possible_pfn; 26 27 /** 28 * enum memblock_flags - definition of memory region attributes 29 * @MEMBLOCK_NONE: no special request 30 * @MEMBLOCK_HOTPLUG: memory region indicated in the firmware-provided memory 31 * map during early boot as hot(un)pluggable system RAM (e.g., memory range 32 * that might get hotunplugged later). With "movable_node" set on the kernel 33 * commandline, try keeping this memory region hotunpluggable. Does not apply 34 * to memblocks added ("hotplugged") after early boot. 35 * @MEMBLOCK_MIRROR: mirrored region 36 * @MEMBLOCK_NOMAP: don't add to kernel direct mapping and treat as 37 * reserved in the memory map; refer to memblock_mark_nomap() description 38 * for further details 39 * @MEMBLOCK_DRIVER_MANAGED: memory region that is always detected and added 40 * via a driver, and never indicated in the firmware-provided memory map as 41 * system RAM. This corresponds to IORESOURCE_SYSRAM_DRIVER_MANAGED in the 42 * kernel resource tree. 43 * @MEMBLOCK_RSRV_NOINIT: memory region for which struct pages are 44 * not initialized (only for reserved regions). 45 */ 46 enum memblock_flags { 47 MEMBLOCK_NONE = 0x0, /* No special request */ 48 MEMBLOCK_HOTPLUG = 0x1, /* hotpluggable region */ 49 MEMBLOCK_MIRROR = 0x2, /* mirrored region */ 50 MEMBLOCK_NOMAP = 0x4, /* don't add to kernel direct mapping */ 51 MEMBLOCK_DRIVER_MANAGED = 0x8, /* always detected via a driver */ 52 MEMBLOCK_RSRV_NOINIT = 0x10, /* don't initialize struct pages */ 53 }; 54 55 /** 56 * struct memblock_region - represents a memory region 57 * @base: base address of the region 58 * @size: size of the region 59 * @flags: memory region attributes 60 * @nid: NUMA node id 61 */ 62 struct memblock_region { 63 phys_addr_t base; 64 phys_addr_t size; 65 enum memblock_flags flags; 66 #ifdef CONFIG_NUMA 67 int nid; 68 #endif 69 }; 70 71 /** 72 * struct memblock_type - collection of memory regions of certain type 73 * @cnt: number of regions 74 * @max: size of the allocated array 75 * @total_size: size of all regions 76 * @regions: array of regions 77 * @name: the memory type symbolic name 78 */ 79 struct memblock_type { 80 unsigned long cnt; 81 unsigned long max; 82 phys_addr_t total_size; 83 struct memblock_region *regions; 84 char *name; 85 }; 86 87 /** 88 * struct memblock - memblock allocator metadata 89 * @bottom_up: is bottom up direction? 90 * @current_limit: physical address of the current allocation limit 91 * @memory: usable memory regions 92 * @reserved: reserved memory regions 93 */ 94 struct memblock { 95 bool bottom_up; /* is bottom up direction? */ 96 phys_addr_t current_limit; 97 struct memblock_type memory; 98 struct memblock_type reserved; 99 }; 100 101 extern struct memblock memblock; 102 103 #ifndef CONFIG_ARCH_KEEP_MEMBLOCK 104 #define __init_memblock __meminit 105 #define __initdata_memblock __meminitdata 106 void memblock_discard(void); 107 #else 108 #define __init_memblock 109 #define __initdata_memblock 110 static inline void memblock_discard(void) {} 111 #endif 112 113 void memblock_allow_resize(void); 114 int memblock_add_node(phys_addr_t base, phys_addr_t size, int nid, 115 enum memblock_flags flags); 116 int memblock_add(phys_addr_t base, phys_addr_t size); 117 int memblock_remove(phys_addr_t base, phys_addr_t size); 118 int memblock_phys_free(phys_addr_t base, phys_addr_t size); 119 int memblock_reserve(phys_addr_t base, phys_addr_t size); 120 #ifdef CONFIG_HAVE_MEMBLOCK_PHYS_MAP 121 int memblock_physmem_add(phys_addr_t base, phys_addr_t size); 122 #endif 123 void memblock_trim_memory(phys_addr_t align); 124 bool memblock_overlaps_region(struct memblock_type *type, 125 phys_addr_t base, phys_addr_t size); 126 bool memblock_validate_numa_coverage(unsigned long threshold_bytes); 127 int memblock_mark_hotplug(phys_addr_t base, phys_addr_t size); 128 int memblock_clear_hotplug(phys_addr_t base, phys_addr_t size); 129 int memblock_mark_mirror(phys_addr_t base, phys_addr_t size); 130 int memblock_mark_nomap(phys_addr_t base, phys_addr_t size); 131 int memblock_clear_nomap(phys_addr_t base, phys_addr_t size); 132 int memblock_reserved_mark_noinit(phys_addr_t base, phys_addr_t size); 133 134 void memblock_free_all(void); 135 void memblock_free(void *ptr, size_t size); 136 void reset_all_zones_managed_pages(void); 137 138 /* Low level functions */ 139 void __next_mem_range(u64 *idx, int nid, enum memblock_flags flags, 140 struct memblock_type *type_a, 141 struct memblock_type *type_b, phys_addr_t *out_start, 142 phys_addr_t *out_end, int *out_nid); 143 144 void __next_mem_range_rev(u64 *idx, int nid, enum memblock_flags flags, 145 struct memblock_type *type_a, 146 struct memblock_type *type_b, phys_addr_t *out_start, 147 phys_addr_t *out_end, int *out_nid); 148 149 void memblock_free_late(phys_addr_t base, phys_addr_t size); 150 151 #ifdef CONFIG_HAVE_MEMBLOCK_PHYS_MAP 152 static inline void __next_physmem_range(u64 *idx, struct memblock_type *type, 153 phys_addr_t *out_start, 154 phys_addr_t *out_end) 155 { 156 extern struct memblock_type physmem; 157 158 __next_mem_range(idx, NUMA_NO_NODE, MEMBLOCK_NONE, &physmem, type, 159 out_start, out_end, NULL); 160 } 161 162 /** 163 * for_each_physmem_range - iterate through physmem areas not included in type. 164 * @i: u64 used as loop variable 165 * @type: ptr to memblock_type which excludes from the iteration, can be %NULL 166 * @p_start: ptr to phys_addr_t for start address of the range, can be %NULL 167 * @p_end: ptr to phys_addr_t for end address of the range, can be %NULL 168 */ 169 #define for_each_physmem_range(i, type, p_start, p_end) \ 170 for (i = 0, __next_physmem_range(&i, type, p_start, p_end); \ 171 i != (u64)ULLONG_MAX; \ 172 __next_physmem_range(&i, type, p_start, p_end)) 173 #endif /* CONFIG_HAVE_MEMBLOCK_PHYS_MAP */ 174 175 /** 176 * __for_each_mem_range - iterate through memblock areas from type_a and not 177 * included in type_b. Or just type_a if type_b is NULL. 178 * @i: u64 used as loop variable 179 * @type_a: ptr to memblock_type to iterate 180 * @type_b: ptr to memblock_type which excludes from the iteration 181 * @nid: node selector, %NUMA_NO_NODE for all nodes 182 * @flags: pick from blocks based on memory attributes 183 * @p_start: ptr to phys_addr_t for start address of the range, can be %NULL 184 * @p_end: ptr to phys_addr_t for end address of the range, can be %NULL 185 * @p_nid: ptr to int for nid of the range, can be %NULL 186 */ 187 #define __for_each_mem_range(i, type_a, type_b, nid, flags, \ 188 p_start, p_end, p_nid) \ 189 for (i = 0, __next_mem_range(&i, nid, flags, type_a, type_b, \ 190 p_start, p_end, p_nid); \ 191 i != (u64)ULLONG_MAX; \ 192 __next_mem_range(&i, nid, flags, type_a, type_b, \ 193 p_start, p_end, p_nid)) 194 195 /** 196 * __for_each_mem_range_rev - reverse iterate through memblock areas from 197 * type_a and not included in type_b. Or just type_a if type_b is NULL. 198 * @i: u64 used as loop variable 199 * @type_a: ptr to memblock_type to iterate 200 * @type_b: ptr to memblock_type which excludes from the iteration 201 * @nid: node selector, %NUMA_NO_NODE for all nodes 202 * @flags: pick from blocks based on memory attributes 203 * @p_start: ptr to phys_addr_t for start address of the range, can be %NULL 204 * @p_end: ptr to phys_addr_t for end address of the range, can be %NULL 205 * @p_nid: ptr to int for nid of the range, can be %NULL 206 */ 207 #define __for_each_mem_range_rev(i, type_a, type_b, nid, flags, \ 208 p_start, p_end, p_nid) \ 209 for (i = (u64)ULLONG_MAX, \ 210 __next_mem_range_rev(&i, nid, flags, type_a, type_b, \ 211 p_start, p_end, p_nid); \ 212 i != (u64)ULLONG_MAX; \ 213 __next_mem_range_rev(&i, nid, flags, type_a, type_b, \ 214 p_start, p_end, p_nid)) 215 216 /** 217 * for_each_mem_range - iterate through memory areas. 218 * @i: u64 used as loop variable 219 * @p_start: ptr to phys_addr_t for start address of the range, can be %NULL 220 * @p_end: ptr to phys_addr_t for end address of the range, can be %NULL 221 */ 222 #define for_each_mem_range(i, p_start, p_end) \ 223 __for_each_mem_range(i, &memblock.memory, NULL, NUMA_NO_NODE, \ 224 MEMBLOCK_HOTPLUG | MEMBLOCK_DRIVER_MANAGED, \ 225 p_start, p_end, NULL) 226 227 /** 228 * for_each_mem_range_rev - reverse iterate through memblock areas from 229 * type_a and not included in type_b. Or just type_a if type_b is NULL. 230 * @i: u64 used as loop variable 231 * @p_start: ptr to phys_addr_t for start address of the range, can be %NULL 232 * @p_end: ptr to phys_addr_t for end address of the range, can be %NULL 233 */ 234 #define for_each_mem_range_rev(i, p_start, p_end) \ 235 __for_each_mem_range_rev(i, &memblock.memory, NULL, NUMA_NO_NODE, \ 236 MEMBLOCK_HOTPLUG | MEMBLOCK_DRIVER_MANAGED,\ 237 p_start, p_end, NULL) 238 239 /** 240 * for_each_reserved_mem_range - iterate over all reserved memblock areas 241 * @i: u64 used as loop variable 242 * @p_start: ptr to phys_addr_t for start address of the range, can be %NULL 243 * @p_end: ptr to phys_addr_t for end address of the range, can be %NULL 244 * 245 * Walks over reserved areas of memblock. Available as soon as memblock 246 * is initialized. 247 */ 248 #define for_each_reserved_mem_range(i, p_start, p_end) \ 249 __for_each_mem_range(i, &memblock.reserved, NULL, NUMA_NO_NODE, \ 250 MEMBLOCK_NONE, p_start, p_end, NULL) 251 252 static inline bool memblock_is_hotpluggable(struct memblock_region *m) 253 { 254 return m->flags & MEMBLOCK_HOTPLUG; 255 } 256 257 static inline bool memblock_is_mirror(struct memblock_region *m) 258 { 259 return m->flags & MEMBLOCK_MIRROR; 260 } 261 262 static inline bool memblock_is_nomap(struct memblock_region *m) 263 { 264 return m->flags & MEMBLOCK_NOMAP; 265 } 266 267 static inline bool memblock_is_reserved_noinit(struct memblock_region *m) 268 { 269 return m->flags & MEMBLOCK_RSRV_NOINIT; 270 } 271 272 static inline bool memblock_is_driver_managed(struct memblock_region *m) 273 { 274 return m->flags & MEMBLOCK_DRIVER_MANAGED; 275 } 276 277 int memblock_search_pfn_nid(unsigned long pfn, unsigned long *start_pfn, 278 unsigned long *end_pfn); 279 void __next_mem_pfn_range(int *idx, int nid, unsigned long *out_start_pfn, 280 unsigned long *out_end_pfn, int *out_nid); 281 282 /** 283 * for_each_mem_pfn_range - early memory pfn range iterator 284 * @i: an integer used as loop variable 285 * @nid: node selector, %MAX_NUMNODES for all nodes 286 * @p_start: ptr to ulong for start pfn of the range, can be %NULL 287 * @p_end: ptr to ulong for end pfn of the range, can be %NULL 288 * @p_nid: ptr to int for nid of the range, can be %NULL 289 * 290 * Walks over configured memory ranges. 291 */ 292 #define for_each_mem_pfn_range(i, nid, p_start, p_end, p_nid) \ 293 for (i = -1, __next_mem_pfn_range(&i, nid, p_start, p_end, p_nid); \ 294 i >= 0; __next_mem_pfn_range(&i, nid, p_start, p_end, p_nid)) 295 296 #ifdef CONFIG_DEFERRED_STRUCT_PAGE_INIT 297 void __next_mem_pfn_range_in_zone(u64 *idx, struct zone *zone, 298 unsigned long *out_spfn, 299 unsigned long *out_epfn); 300 /** 301 * for_each_free_mem_pfn_range_in_zone - iterate through zone specific free 302 * memblock areas 303 * @i: u64 used as loop variable 304 * @zone: zone in which all of the memory blocks reside 305 * @p_start: ptr to phys_addr_t for start address of the range, can be %NULL 306 * @p_end: ptr to phys_addr_t for end address of the range, can be %NULL 307 * 308 * Walks over free (memory && !reserved) areas of memblock in a specific 309 * zone. Available once memblock and an empty zone is initialized. The main 310 * assumption is that the zone start, end, and pgdat have been associated. 311 * This way we can use the zone to determine NUMA node, and if a given part 312 * of the memblock is valid for the zone. 313 */ 314 #define for_each_free_mem_pfn_range_in_zone(i, zone, p_start, p_end) \ 315 for (i = 0, \ 316 __next_mem_pfn_range_in_zone(&i, zone, p_start, p_end); \ 317 i != U64_MAX; \ 318 __next_mem_pfn_range_in_zone(&i, zone, p_start, p_end)) 319 320 /** 321 * for_each_free_mem_pfn_range_in_zone_from - iterate through zone specific 322 * free memblock areas from a given point 323 * @i: u64 used as loop variable 324 * @zone: zone in which all of the memory blocks reside 325 * @p_start: ptr to phys_addr_t for start address of the range, can be %NULL 326 * @p_end: ptr to phys_addr_t for end address of the range, can be %NULL 327 * 328 * Walks over free (memory && !reserved) areas of memblock in a specific 329 * zone, continuing from current position. Available as soon as memblock is 330 * initialized. 331 */ 332 #define for_each_free_mem_pfn_range_in_zone_from(i, zone, p_start, p_end) \ 333 for (; i != U64_MAX; \ 334 __next_mem_pfn_range_in_zone(&i, zone, p_start, p_end)) 335 336 int __init deferred_page_init_max_threads(const struct cpumask *node_cpumask); 337 338 #endif /* CONFIG_DEFERRED_STRUCT_PAGE_INIT */ 339 340 /** 341 * for_each_free_mem_range - iterate through free memblock areas 342 * @i: u64 used as loop variable 343 * @nid: node selector, %NUMA_NO_NODE for all nodes 344 * @flags: pick from blocks based on memory attributes 345 * @p_start: ptr to phys_addr_t for start address of the range, can be %NULL 346 * @p_end: ptr to phys_addr_t for end address of the range, can be %NULL 347 * @p_nid: ptr to int for nid of the range, can be %NULL 348 * 349 * Walks over free (memory && !reserved) areas of memblock. Available as 350 * soon as memblock is initialized. 351 */ 352 #define for_each_free_mem_range(i, nid, flags, p_start, p_end, p_nid) \ 353 __for_each_mem_range(i, &memblock.memory, &memblock.reserved, \ 354 nid, flags, p_start, p_end, p_nid) 355 356 /** 357 * for_each_free_mem_range_reverse - rev-iterate through free memblock areas 358 * @i: u64 used as loop variable 359 * @nid: node selector, %NUMA_NO_NODE for all nodes 360 * @flags: pick from blocks based on memory attributes 361 * @p_start: ptr to phys_addr_t for start address of the range, can be %NULL 362 * @p_end: ptr to phys_addr_t for end address of the range, can be %NULL 363 * @p_nid: ptr to int for nid of the range, can be %NULL 364 * 365 * Walks over free (memory && !reserved) areas of memblock in reverse 366 * order. Available as soon as memblock is initialized. 367 */ 368 #define for_each_free_mem_range_reverse(i, nid, flags, p_start, p_end, \ 369 p_nid) \ 370 __for_each_mem_range_rev(i, &memblock.memory, &memblock.reserved, \ 371 nid, flags, p_start, p_end, p_nid) 372 373 int memblock_set_node(phys_addr_t base, phys_addr_t size, 374 struct memblock_type *type, int nid); 375 376 #ifdef CONFIG_NUMA 377 static inline void memblock_set_region_node(struct memblock_region *r, int nid) 378 { 379 r->nid = nid; 380 } 381 382 static inline int memblock_get_region_node(const struct memblock_region *r) 383 { 384 return r->nid; 385 } 386 #else 387 static inline void memblock_set_region_node(struct memblock_region *r, int nid) 388 { 389 } 390 391 static inline int memblock_get_region_node(const struct memblock_region *r) 392 { 393 return 0; 394 } 395 #endif /* CONFIG_NUMA */ 396 397 /* Flags for memblock allocation APIs */ 398 #define MEMBLOCK_ALLOC_ANYWHERE (~(phys_addr_t)0) 399 #define MEMBLOCK_ALLOC_ACCESSIBLE 0 400 #define MEMBLOCK_ALLOC_NOLEAKTRACE 1 401 402 /* We are using top down, so it is safe to use 0 here */ 403 #define MEMBLOCK_LOW_LIMIT 0 404 405 #ifndef ARCH_LOW_ADDRESS_LIMIT 406 #define ARCH_LOW_ADDRESS_LIMIT 0xffffffffUL 407 #endif 408 409 phys_addr_t memblock_phys_alloc_range(phys_addr_t size, phys_addr_t align, 410 phys_addr_t start, phys_addr_t end); 411 phys_addr_t memblock_alloc_range_nid(phys_addr_t size, 412 phys_addr_t align, phys_addr_t start, 413 phys_addr_t end, int nid, bool exact_nid); 414 phys_addr_t memblock_phys_alloc_try_nid(phys_addr_t size, phys_addr_t align, int nid); 415 416 static __always_inline phys_addr_t memblock_phys_alloc(phys_addr_t size, 417 phys_addr_t align) 418 { 419 return memblock_phys_alloc_range(size, align, 0, 420 MEMBLOCK_ALLOC_ACCESSIBLE); 421 } 422 423 void *memblock_alloc_exact_nid_raw(phys_addr_t size, phys_addr_t align, 424 phys_addr_t min_addr, phys_addr_t max_addr, 425 int nid); 426 void *memblock_alloc_try_nid_raw(phys_addr_t size, phys_addr_t align, 427 phys_addr_t min_addr, phys_addr_t max_addr, 428 int nid); 429 void *memblock_alloc_try_nid(phys_addr_t size, phys_addr_t align, 430 phys_addr_t min_addr, phys_addr_t max_addr, 431 int nid); 432 433 static __always_inline void *memblock_alloc(phys_addr_t size, phys_addr_t align) 434 { 435 return memblock_alloc_try_nid(size, align, MEMBLOCK_LOW_LIMIT, 436 MEMBLOCK_ALLOC_ACCESSIBLE, NUMA_NO_NODE); 437 } 438 439 static inline void *memblock_alloc_raw(phys_addr_t size, 440 phys_addr_t align) 441 { 442 return memblock_alloc_try_nid_raw(size, align, MEMBLOCK_LOW_LIMIT, 443 MEMBLOCK_ALLOC_ACCESSIBLE, 444 NUMA_NO_NODE); 445 } 446 447 static inline void *memblock_alloc_from(phys_addr_t size, 448 phys_addr_t align, 449 phys_addr_t min_addr) 450 { 451 return memblock_alloc_try_nid(size, align, min_addr, 452 MEMBLOCK_ALLOC_ACCESSIBLE, NUMA_NO_NODE); 453 } 454 455 static inline void *memblock_alloc_low(phys_addr_t size, 456 phys_addr_t align) 457 { 458 return memblock_alloc_try_nid(size, align, MEMBLOCK_LOW_LIMIT, 459 ARCH_LOW_ADDRESS_LIMIT, NUMA_NO_NODE); 460 } 461 462 static inline void *memblock_alloc_node(phys_addr_t size, 463 phys_addr_t align, int nid) 464 { 465 return memblock_alloc_try_nid(size, align, MEMBLOCK_LOW_LIMIT, 466 MEMBLOCK_ALLOC_ACCESSIBLE, nid); 467 } 468 469 /* 470 * Set the allocation direction to bottom-up or top-down. 471 */ 472 static inline __init_memblock void memblock_set_bottom_up(bool enable) 473 { 474 memblock.bottom_up = enable; 475 } 476 477 /* 478 * Check if the allocation direction is bottom-up or not. 479 * if this is true, that said, memblock will allocate memory 480 * in bottom-up direction. 481 */ 482 static inline __init_memblock bool memblock_bottom_up(void) 483 { 484 return memblock.bottom_up; 485 } 486 487 phys_addr_t memblock_phys_mem_size(void); 488 phys_addr_t memblock_reserved_size(void); 489 phys_addr_t memblock_start_of_DRAM(void); 490 phys_addr_t memblock_end_of_DRAM(void); 491 void memblock_enforce_memory_limit(phys_addr_t memory_limit); 492 void memblock_cap_memory_range(phys_addr_t base, phys_addr_t size); 493 void memblock_mem_limit_remove_map(phys_addr_t limit); 494 bool memblock_is_memory(phys_addr_t addr); 495 bool memblock_is_map_memory(phys_addr_t addr); 496 bool memblock_is_region_memory(phys_addr_t base, phys_addr_t size); 497 bool memblock_is_reserved(phys_addr_t addr); 498 bool memblock_is_region_reserved(phys_addr_t base, phys_addr_t size); 499 500 void memblock_dump_all(void); 501 502 /** 503 * memblock_set_current_limit - Set the current allocation limit to allow 504 * limiting allocations to what is currently 505 * accessible during boot 506 * @limit: New limit value (physical address) 507 */ 508 void memblock_set_current_limit(phys_addr_t limit); 509 510 511 phys_addr_t memblock_get_current_limit(void); 512 513 /* 514 * pfn conversion functions 515 * 516 * While the memory MEMBLOCKs should always be page aligned, the reserved 517 * MEMBLOCKs may not be. This accessor attempt to provide a very clear 518 * idea of what they return for such non aligned MEMBLOCKs. 519 */ 520 521 /** 522 * memblock_region_memory_base_pfn - get the lowest pfn of the memory region 523 * @reg: memblock_region structure 524 * 525 * Return: the lowest pfn intersecting with the memory region 526 */ 527 static inline unsigned long memblock_region_memory_base_pfn(const struct memblock_region *reg) 528 { 529 return PFN_UP(reg->base); 530 } 531 532 /** 533 * memblock_region_memory_end_pfn - get the end pfn of the memory region 534 * @reg: memblock_region structure 535 * 536 * Return: the end_pfn of the reserved region 537 */ 538 static inline unsigned long memblock_region_memory_end_pfn(const struct memblock_region *reg) 539 { 540 return PFN_DOWN(reg->base + reg->size); 541 } 542 543 /** 544 * memblock_region_reserved_base_pfn - get the lowest pfn of the reserved region 545 * @reg: memblock_region structure 546 * 547 * Return: the lowest pfn intersecting with the reserved region 548 */ 549 static inline unsigned long memblock_region_reserved_base_pfn(const struct memblock_region *reg) 550 { 551 return PFN_DOWN(reg->base); 552 } 553 554 /** 555 * memblock_region_reserved_end_pfn - get the end pfn of the reserved region 556 * @reg: memblock_region structure 557 * 558 * Return: the end_pfn of the reserved region 559 */ 560 static inline unsigned long memblock_region_reserved_end_pfn(const struct memblock_region *reg) 561 { 562 return PFN_UP(reg->base + reg->size); 563 } 564 565 /** 566 * for_each_mem_region - itereate over memory regions 567 * @region: loop variable 568 */ 569 #define for_each_mem_region(region) \ 570 for (region = memblock.memory.regions; \ 571 region < (memblock.memory.regions + memblock.memory.cnt); \ 572 region++) 573 574 /** 575 * for_each_reserved_mem_region - itereate over reserved memory regions 576 * @region: loop variable 577 */ 578 #define for_each_reserved_mem_region(region) \ 579 for (region = memblock.reserved.regions; \ 580 region < (memblock.reserved.regions + memblock.reserved.cnt); \ 581 region++) 582 583 extern void *alloc_large_system_hash(const char *tablename, 584 unsigned long bucketsize, 585 unsigned long numentries, 586 int scale, 587 int flags, 588 unsigned int *_hash_shift, 589 unsigned int *_hash_mask, 590 unsigned long low_limit, 591 unsigned long high_limit); 592 593 #define HASH_EARLY 0x00000001 /* Allocating during early boot? */ 594 #define HASH_ZERO 0x00000002 /* Zero allocated hash table */ 595 596 /* Only NUMA needs hash distribution. 64bit NUMA architectures have 597 * sufficient vmalloc space. 598 */ 599 #ifdef CONFIG_NUMA 600 #define HASHDIST_DEFAULT IS_ENABLED(CONFIG_64BIT) 601 extern int hashdist; /* Distribute hashes across NUMA nodes? */ 602 #else 603 #define hashdist (0) 604 #endif 605 606 #ifdef CONFIG_MEMTEST 607 void early_memtest(phys_addr_t start, phys_addr_t end); 608 void memtest_report_meminfo(struct seq_file *m); 609 #else 610 static inline void early_memtest(phys_addr_t start, phys_addr_t end) { } 611 static inline void memtest_report_meminfo(struct seq_file *m) { } 612 #endif 613 614 615 #endif /* _LINUX_MEMBLOCK_H */ 616