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 15extern unsigned long max_low_pfn; 16extern unsigned long min_low_pfn; 17 18/* 19 * highest page 20 */ 21extern unsigned long max_pfn; 22/* 23 * highest possible page 24 */ 25extern 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 */ 46enum 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 */ 62struct 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 */ 79struct 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 */ 94struct 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 101extern struct memblock memblock; 102 103#ifndef CONFIG_ARCH_KEEP_MEMBLOCK 104#define __init_memblock __meminit 105#define __initdata_memblock __meminitdata 106void memblock_discard(void); 107#else 108#define __init_memblock 109#define __initdata_memblock 110static inline void memblock_discard(void) {} 111#endif 112 113void memblock_allow_resize(void); 114int memblock_add_node(phys_addr_t base, phys_addr_t size, int nid, 115 enum memblock_flags flags); 116int memblock_add(phys_addr_t base, phys_addr_t size); 117int memblock_remove(phys_addr_t base, phys_addr_t size); 118int memblock_phys_free(phys_addr_t base, phys_addr_t size); 119int memblock_reserve(phys_addr_t base, phys_addr_t size); 120#ifdef CONFIG_HAVE_MEMBLOCK_PHYS_MAP 121int memblock_physmem_add(phys_addr_t base, phys_addr_t size); 122#endif 123void memblock_trim_memory(phys_addr_t align); 124unsigned long memblock_addrs_overlap(phys_addr_t base1, phys_addr_t size1, 125 phys_addr_t base2, phys_addr_t size2); 126bool memblock_overlaps_region(struct memblock_type *type, 127 phys_addr_t base, phys_addr_t size); 128bool memblock_validate_numa_coverage(unsigned long threshold_bytes); 129int memblock_mark_hotplug(phys_addr_t base, phys_addr_t size); 130int memblock_clear_hotplug(phys_addr_t base, phys_addr_t size); 131int memblock_mark_mirror(phys_addr_t base, phys_addr_t size); 132int memblock_mark_nomap(phys_addr_t base, phys_addr_t size); 133int memblock_clear_nomap(phys_addr_t base, phys_addr_t size); 134int memblock_reserved_mark_noinit(phys_addr_t base, phys_addr_t size); 135 136void memblock_free_all(void); 137void memblock_free(void *ptr, size_t size); 138void reset_all_zones_managed_pages(void); 139 140/* Low level functions */ 141void __next_mem_range(u64 *idx, int nid, enum memblock_flags flags, 142 struct memblock_type *type_a, 143 struct memblock_type *type_b, phys_addr_t *out_start, 144 phys_addr_t *out_end, int *out_nid); 145 146void __next_mem_range_rev(u64 *idx, int nid, enum memblock_flags flags, 147 struct memblock_type *type_a, 148 struct memblock_type *type_b, phys_addr_t *out_start, 149 phys_addr_t *out_end, int *out_nid); 150 151void memblock_free_late(phys_addr_t base, phys_addr_t size); 152 153#ifdef CONFIG_HAVE_MEMBLOCK_PHYS_MAP 154static inline void __next_physmem_range(u64 *idx, struct memblock_type *type, 155 phys_addr_t *out_start, 156 phys_addr_t *out_end) 157{ 158 extern struct memblock_type physmem; 159 160 __next_mem_range(idx, NUMA_NO_NODE, MEMBLOCK_NONE, &physmem, type, 161 out_start, out_end, NULL); 162} 163 164/** 165 * for_each_physmem_range - iterate through physmem areas not included in type. 166 * @i: u64 used as loop variable 167 * @type: ptr to memblock_type which excludes from the iteration, can be %NULL 168 * @p_start: ptr to phys_addr_t for start address of the range, can be %NULL 169 * @p_end: ptr to phys_addr_t for end address of the range, can be %NULL 170 */ 171#define for_each_physmem_range(i, type, p_start, p_end) \ 172 for (i = 0, __next_physmem_range(&i, type, p_start, p_end); \ 173 i != (u64)ULLONG_MAX; \ 174 __next_physmem_range(&i, type, p_start, p_end)) 175#endif /* CONFIG_HAVE_MEMBLOCK_PHYS_MAP */ 176 177/** 178 * __for_each_mem_range - iterate through memblock areas from type_a and not 179 * included in type_b. Or just type_a if type_b is NULL. 180 * @i: u64 used as loop variable 181 * @type_a: ptr to memblock_type to iterate 182 * @type_b: ptr to memblock_type which excludes from the iteration 183 * @nid: node selector, %NUMA_NO_NODE for all nodes 184 * @flags: pick from blocks based on memory attributes 185 * @p_start: ptr to phys_addr_t for start address of the range, can be %NULL 186 * @p_end: ptr to phys_addr_t for end address of the range, can be %NULL 187 * @p_nid: ptr to int for nid of the range, can be %NULL 188 */ 189#define __for_each_mem_range(i, type_a, type_b, nid, flags, \ 190 p_start, p_end, p_nid) \ 191 for (i = 0, __next_mem_range(&i, nid, flags, type_a, type_b, \ 192 p_start, p_end, p_nid); \ 193 i != (u64)ULLONG_MAX; \ 194 __next_mem_range(&i, nid, flags, type_a, type_b, \ 195 p_start, p_end, p_nid)) 196 197/** 198 * __for_each_mem_range_rev - reverse iterate through memblock areas from 199 * type_a and not included in type_b. Or just type_a if type_b is NULL. 200 * @i: u64 used as loop variable 201 * @type_a: ptr to memblock_type to iterate 202 * @type_b: ptr to memblock_type which excludes from the iteration 203 * @nid: node selector, %NUMA_NO_NODE for all nodes 204 * @flags: pick from blocks based on memory attributes 205 * @p_start: ptr to phys_addr_t for start address of the range, can be %NULL 206 * @p_end: ptr to phys_addr_t for end address of the range, can be %NULL 207 * @p_nid: ptr to int for nid of the range, can be %NULL 208 */ 209#define __for_each_mem_range_rev(i, type_a, type_b, nid, flags, \ 210 p_start, p_end, p_nid) \ 211 for (i = (u64)ULLONG_MAX, \ 212 __next_mem_range_rev(&i, nid, flags, type_a, type_b, \ 213 p_start, p_end, p_nid); \ 214 i != (u64)ULLONG_MAX; \ 215 __next_mem_range_rev(&i, nid, flags, type_a, type_b, \ 216 p_start, p_end, p_nid)) 217 218/** 219 * for_each_mem_range - iterate through memory areas. 220 * @i: u64 used as loop variable 221 * @p_start: ptr to phys_addr_t for start address of the range, can be %NULL 222 * @p_end: ptr to phys_addr_t for end address of the range, can be %NULL 223 */ 224#define for_each_mem_range(i, p_start, p_end) \ 225 __for_each_mem_range(i, &memblock.memory, NULL, NUMA_NO_NODE, \ 226 MEMBLOCK_HOTPLUG | MEMBLOCK_DRIVER_MANAGED, \ 227 p_start, p_end, NULL) 228 229/** 230 * for_each_mem_range_rev - reverse iterate through memblock areas from 231 * type_a and not included in type_b. Or just type_a if type_b is NULL. 232 * @i: u64 used as loop variable 233 * @p_start: ptr to phys_addr_t for start address of the range, can be %NULL 234 * @p_end: ptr to phys_addr_t for end address of the range, can be %NULL 235 */ 236#define for_each_mem_range_rev(i, p_start, p_end) \ 237 __for_each_mem_range_rev(i, &memblock.memory, NULL, NUMA_NO_NODE, \ 238 MEMBLOCK_HOTPLUG | MEMBLOCK_DRIVER_MANAGED,\ 239 p_start, p_end, NULL) 240 241/** 242 * for_each_reserved_mem_range - iterate over all reserved memblock areas 243 * @i: u64 used as loop variable 244 * @p_start: ptr to phys_addr_t for start address of the range, can be %NULL 245 * @p_end: ptr to phys_addr_t for end address of the range, can be %NULL 246 * 247 * Walks over reserved areas of memblock. Available as soon as memblock 248 * is initialized. 249 */ 250#define for_each_reserved_mem_range(i, p_start, p_end) \ 251 __for_each_mem_range(i, &memblock.reserved, NULL, NUMA_NO_NODE, \ 252 MEMBLOCK_NONE, p_start, p_end, NULL) 253 254static inline bool memblock_is_hotpluggable(struct memblock_region *m) 255{ 256 return m->flags & MEMBLOCK_HOTPLUG; 257} 258 259static inline bool memblock_is_mirror(struct memblock_region *m) 260{ 261 return m->flags & MEMBLOCK_MIRROR; 262} 263 264static inline bool memblock_is_nomap(struct memblock_region *m) 265{ 266 return m->flags & MEMBLOCK_NOMAP; 267} 268 269static inline bool memblock_is_reserved_noinit(struct memblock_region *m) 270{ 271 return m->flags & MEMBLOCK_RSRV_NOINIT; 272} 273 274static inline bool memblock_is_driver_managed(struct memblock_region *m) 275{ 276 return m->flags & MEMBLOCK_DRIVER_MANAGED; 277} 278 279int memblock_search_pfn_nid(unsigned long pfn, unsigned long *start_pfn, 280 unsigned long *end_pfn); 281void __next_mem_pfn_range(int *idx, int nid, unsigned long *out_start_pfn, 282 unsigned long *out_end_pfn, int *out_nid); 283 284/** 285 * for_each_mem_pfn_range - early memory pfn range iterator 286 * @i: an integer used as loop variable 287 * @nid: node selector, %MAX_NUMNODES for all nodes 288 * @p_start: ptr to ulong for start pfn of the range, can be %NULL 289 * @p_end: ptr to ulong for end pfn of the range, can be %NULL 290 * @p_nid: ptr to int for nid of the range, can be %NULL 291 * 292 * Walks over configured memory ranges. 293 */ 294#define for_each_mem_pfn_range(i, nid, p_start, p_end, p_nid) \ 295 for (i = -1, __next_mem_pfn_range(&i, nid, p_start, p_end, p_nid); \ 296 i >= 0; __next_mem_pfn_range(&i, nid, p_start, p_end, p_nid)) 297 298#ifdef CONFIG_DEFERRED_STRUCT_PAGE_INIT 299void __next_mem_pfn_range_in_zone(u64 *idx, struct zone *zone, 300 unsigned long *out_spfn, 301 unsigned long *out_epfn); 302/** 303 * for_each_free_mem_pfn_range_in_zone - iterate through zone specific free 304 * memblock areas 305 * @i: u64 used as loop variable 306 * @zone: zone in which all of the memory blocks reside 307 * @p_start: ptr to phys_addr_t for start address of the range, can be %NULL 308 * @p_end: ptr to phys_addr_t for end address of the range, can be %NULL 309 * 310 * Walks over free (memory && !reserved) areas of memblock in a specific 311 * zone. Available once memblock and an empty zone is initialized. The main 312 * assumption is that the zone start, end, and pgdat have been associated. 313 * This way we can use the zone to determine NUMA node, and if a given part 314 * of the memblock is valid for the zone. 315 */ 316#define for_each_free_mem_pfn_range_in_zone(i, zone, p_start, p_end) \ 317 for (i = 0, \ 318 __next_mem_pfn_range_in_zone(&i, zone, p_start, p_end); \ 319 i != U64_MAX; \ 320 __next_mem_pfn_range_in_zone(&i, zone, p_start, p_end)) 321 322/** 323 * for_each_free_mem_pfn_range_in_zone_from - iterate through zone specific 324 * free memblock areas from a given point 325 * @i: u64 used as loop variable 326 * @zone: zone in which all of the memory blocks reside 327 * @p_start: ptr to phys_addr_t for start address of the range, can be %NULL 328 * @p_end: ptr to phys_addr_t for end address of the range, can be %NULL 329 * 330 * Walks over free (memory && !reserved) areas of memblock in a specific 331 * zone, continuing from current position. Available as soon as memblock is 332 * initialized. 333 */ 334#define for_each_free_mem_pfn_range_in_zone_from(i, zone, p_start, p_end) \ 335 for (; i != U64_MAX; \ 336 __next_mem_pfn_range_in_zone(&i, zone, p_start, p_end)) 337 338int __init deferred_page_init_max_threads(const struct cpumask *node_cpumask); 339 340#endif /* CONFIG_DEFERRED_STRUCT_PAGE_INIT */ 341 342/** 343 * for_each_free_mem_range - iterate through free memblock areas 344 * @i: u64 used as loop variable 345 * @nid: node selector, %NUMA_NO_NODE for all nodes 346 * @flags: pick from blocks based on memory attributes 347 * @p_start: ptr to phys_addr_t for start address of the range, can be %NULL 348 * @p_end: ptr to phys_addr_t for end address of the range, can be %NULL 349 * @p_nid: ptr to int for nid of the range, can be %NULL 350 * 351 * Walks over free (memory && !reserved) areas of memblock. Available as 352 * soon as memblock is initialized. 353 */ 354#define for_each_free_mem_range(i, nid, flags, p_start, p_end, p_nid) \ 355 __for_each_mem_range(i, &memblock.memory, &memblock.reserved, \ 356 nid, flags, p_start, p_end, p_nid) 357 358/** 359 * for_each_free_mem_range_reverse - rev-iterate through free memblock areas 360 * @i: u64 used as loop variable 361 * @nid: node selector, %NUMA_NO_NODE for all nodes 362 * @flags: pick from blocks based on memory attributes 363 * @p_start: ptr to phys_addr_t for start address of the range, can be %NULL 364 * @p_end: ptr to phys_addr_t for end address of the range, can be %NULL 365 * @p_nid: ptr to int for nid of the range, can be %NULL 366 * 367 * Walks over free (memory && !reserved) areas of memblock in reverse 368 * order. Available as soon as memblock is initialized. 369 */ 370#define for_each_free_mem_range_reverse(i, nid, flags, p_start, p_end, \ 371 p_nid) \ 372 __for_each_mem_range_rev(i, &memblock.memory, &memblock.reserved, \ 373 nid, flags, p_start, p_end, p_nid) 374 375int memblock_set_node(phys_addr_t base, phys_addr_t size, 376 struct memblock_type *type, int nid); 377 378#ifdef CONFIG_NUMA 379static inline void memblock_set_region_node(struct memblock_region *r, int nid) 380{ 381 r->nid = nid; 382} 383 384static inline int memblock_get_region_node(const struct memblock_region *r) 385{ 386 return r->nid; 387} 388#else 389static inline void memblock_set_region_node(struct memblock_region *r, int nid) 390{ 391} 392 393static inline int memblock_get_region_node(const struct memblock_region *r) 394{ 395 return 0; 396} 397#endif /* CONFIG_NUMA */ 398 399/* Flags for memblock allocation APIs */ 400#define MEMBLOCK_ALLOC_ANYWHERE (~(phys_addr_t)0) 401#define MEMBLOCK_ALLOC_ACCESSIBLE 0 402#define MEMBLOCK_ALLOC_NOLEAKTRACE 1 403 404/* We are using top down, so it is safe to use 0 here */ 405#define MEMBLOCK_LOW_LIMIT 0 406 407#ifndef ARCH_LOW_ADDRESS_LIMIT 408#define ARCH_LOW_ADDRESS_LIMIT 0xffffffffUL 409#endif 410 411phys_addr_t memblock_phys_alloc_range(phys_addr_t size, phys_addr_t align, 412 phys_addr_t start, phys_addr_t end); 413phys_addr_t memblock_alloc_range_nid(phys_addr_t size, 414 phys_addr_t align, phys_addr_t start, 415 phys_addr_t end, int nid, bool exact_nid); 416phys_addr_t memblock_phys_alloc_try_nid(phys_addr_t size, phys_addr_t align, int nid); 417 418static __always_inline phys_addr_t memblock_phys_alloc(phys_addr_t size, 419 phys_addr_t align) 420{ 421 return memblock_phys_alloc_range(size, align, 0, 422 MEMBLOCK_ALLOC_ACCESSIBLE); 423} 424 425void *memblock_alloc_exact_nid_raw(phys_addr_t size, phys_addr_t align, 426 phys_addr_t min_addr, phys_addr_t max_addr, 427 int nid); 428void *memblock_alloc_try_nid_raw(phys_addr_t size, phys_addr_t align, 429 phys_addr_t min_addr, phys_addr_t max_addr, 430 int nid); 431void *memblock_alloc_try_nid(phys_addr_t size, phys_addr_t align, 432 phys_addr_t min_addr, phys_addr_t max_addr, 433 int nid); 434 435static __always_inline void *memblock_alloc(phys_addr_t size, phys_addr_t align) 436{ 437 return memblock_alloc_try_nid(size, align, MEMBLOCK_LOW_LIMIT, 438 MEMBLOCK_ALLOC_ACCESSIBLE, NUMA_NO_NODE); 439} 440 441static inline void *memblock_alloc_raw(phys_addr_t size, 442 phys_addr_t align) 443{ 444 return memblock_alloc_try_nid_raw(size, align, MEMBLOCK_LOW_LIMIT, 445 MEMBLOCK_ALLOC_ACCESSIBLE, 446 NUMA_NO_NODE); 447} 448 449static inline void *memblock_alloc_from(phys_addr_t size, 450 phys_addr_t align, 451 phys_addr_t min_addr) 452{ 453 return memblock_alloc_try_nid(size, align, min_addr, 454 MEMBLOCK_ALLOC_ACCESSIBLE, NUMA_NO_NODE); 455} 456 457static inline void *memblock_alloc_low(phys_addr_t size, 458 phys_addr_t align) 459{ 460 return memblock_alloc_try_nid(size, align, MEMBLOCK_LOW_LIMIT, 461 ARCH_LOW_ADDRESS_LIMIT, NUMA_NO_NODE); 462} 463 464static inline void *memblock_alloc_node(phys_addr_t size, 465 phys_addr_t align, int nid) 466{ 467 return memblock_alloc_try_nid(size, align, MEMBLOCK_LOW_LIMIT, 468 MEMBLOCK_ALLOC_ACCESSIBLE, nid); 469} 470 471/* 472 * Set the allocation direction to bottom-up or top-down. 473 */ 474static inline __init_memblock void memblock_set_bottom_up(bool enable) 475{ 476 memblock.bottom_up = enable; 477} 478 479/* 480 * Check if the allocation direction is bottom-up or not. 481 * if this is true, that said, memblock will allocate memory 482 * in bottom-up direction. 483 */ 484static inline __init_memblock bool memblock_bottom_up(void) 485{ 486 return memblock.bottom_up; 487} 488 489phys_addr_t memblock_phys_mem_size(void); 490phys_addr_t memblock_reserved_size(void); 491phys_addr_t memblock_start_of_DRAM(void); 492phys_addr_t memblock_end_of_DRAM(void); 493void memblock_enforce_memory_limit(phys_addr_t memory_limit); 494void memblock_cap_memory_range(phys_addr_t base, phys_addr_t size); 495void memblock_mem_limit_remove_map(phys_addr_t limit); 496bool memblock_is_memory(phys_addr_t addr); 497bool memblock_is_map_memory(phys_addr_t addr); 498bool memblock_is_region_memory(phys_addr_t base, phys_addr_t size); 499bool memblock_is_reserved(phys_addr_t addr); 500bool memblock_is_region_reserved(phys_addr_t base, phys_addr_t size); 501 502void memblock_dump_all(void); 503 504/** 505 * memblock_set_current_limit - Set the current allocation limit to allow 506 * limiting allocations to what is currently 507 * accessible during boot 508 * @limit: New limit value (physical address) 509 */ 510void memblock_set_current_limit(phys_addr_t limit); 511 512 513phys_addr_t memblock_get_current_limit(void); 514 515/* 516 * pfn conversion functions 517 * 518 * While the memory MEMBLOCKs should always be page aligned, the reserved 519 * MEMBLOCKs may not be. This accessor attempt to provide a very clear 520 * idea of what they return for such non aligned MEMBLOCKs. 521 */ 522 523/** 524 * memblock_region_memory_base_pfn - get the lowest pfn of the memory region 525 * @reg: memblock_region structure 526 * 527 * Return: the lowest pfn intersecting with the memory region 528 */ 529static inline unsigned long memblock_region_memory_base_pfn(const struct memblock_region *reg) 530{ 531 return PFN_UP(reg->base); 532} 533 534/** 535 * memblock_region_memory_end_pfn - get the end pfn of the memory region 536 * @reg: memblock_region structure 537 * 538 * Return: the end_pfn of the reserved region 539 */ 540static inline unsigned long memblock_region_memory_end_pfn(const struct memblock_region *reg) 541{ 542 return PFN_DOWN(reg->base + reg->size); 543} 544 545/** 546 * memblock_region_reserved_base_pfn - get the lowest pfn of the reserved region 547 * @reg: memblock_region structure 548 * 549 * Return: the lowest pfn intersecting with the reserved region 550 */ 551static inline unsigned long memblock_region_reserved_base_pfn(const struct memblock_region *reg) 552{ 553 return PFN_DOWN(reg->base); 554} 555 556/** 557 * memblock_region_reserved_end_pfn - get the end pfn of the reserved region 558 * @reg: memblock_region structure 559 * 560 * Return: the end_pfn of the reserved region 561 */ 562static inline unsigned long memblock_region_reserved_end_pfn(const struct memblock_region *reg) 563{ 564 return PFN_UP(reg->base + reg->size); 565} 566 567/** 568 * for_each_mem_region - itereate over memory regions 569 * @region: loop variable 570 */ 571#define for_each_mem_region(region) \ 572 for (region = memblock.memory.regions; \ 573 region < (memblock.memory.regions + memblock.memory.cnt); \ 574 region++) 575 576/** 577 * for_each_reserved_mem_region - itereate over reserved memory regions 578 * @region: loop variable 579 */ 580#define for_each_reserved_mem_region(region) \ 581 for (region = memblock.reserved.regions; \ 582 region < (memblock.reserved.regions + memblock.reserved.cnt); \ 583 region++) 584 585extern void *alloc_large_system_hash(const char *tablename, 586 unsigned long bucketsize, 587 unsigned long numentries, 588 int scale, 589 int flags, 590 unsigned int *_hash_shift, 591 unsigned int *_hash_mask, 592 unsigned long low_limit, 593 unsigned long high_limit); 594 595#define HASH_EARLY 0x00000001 /* Allocating during early boot? */ 596#define HASH_ZERO 0x00000002 /* Zero allocated hash table */ 597 598/* Only NUMA needs hash distribution. 64bit NUMA architectures have 599 * sufficient vmalloc space. 600 */ 601#ifdef CONFIG_NUMA 602#define HASHDIST_DEFAULT IS_ENABLED(CONFIG_64BIT) 603extern int hashdist; /* Distribute hashes across NUMA nodes? */ 604#else 605#define hashdist (0) 606#endif 607 608#ifdef CONFIG_MEMTEST 609void early_memtest(phys_addr_t start, phys_addr_t end); 610void memtest_report_meminfo(struct seq_file *m); 611#else 612static inline void early_memtest(phys_addr_t start, phys_addr_t end) { } 613static inline void memtest_report_meminfo(struct seq_file *m) { } 614#endif 615 616 617#endif /* _LINUX_MEMBLOCK_H */ 618