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