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 memblock_discard(void)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_all(void); 137 void memblock_free(void *ptr, size_t size); 138 void reset_all_zones_managed_pages(void); 139 140 /* Low level functions */ 141 void __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); 145 146 void __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); 150 151 void memblock_free_late(phys_addr_t base, phys_addr_t size); 152 153 #ifdef CONFIG_HAVE_MEMBLOCK_PHYS_MAP __next_physmem_range(u64 * idx,struct memblock_type * type,phys_addr_t * out_start,phys_addr_t * out_end)154 static 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 memblock_is_hotpluggable(struct memblock_region * m)254 static inline bool memblock_is_hotpluggable(struct memblock_region *m) 255 { 256 return m->flags & MEMBLOCK_HOTPLUG; 257 } 258 memblock_is_mirror(struct memblock_region * m)259 static inline bool memblock_is_mirror(struct memblock_region *m) 260 { 261 return m->flags & MEMBLOCK_MIRROR; 262 } 263 memblock_is_nomap(struct memblock_region * m)264 static inline bool memblock_is_nomap(struct memblock_region *m) 265 { 266 return m->flags & MEMBLOCK_NOMAP; 267 } 268 memblock_is_reserved_noinit(struct memblock_region * m)269 static inline bool memblock_is_reserved_noinit(struct memblock_region *m) 270 { 271 return m->flags & MEMBLOCK_RSRV_NOINIT; 272 } 273 memblock_is_driver_managed(struct memblock_region * m)274 static inline bool memblock_is_driver_managed(struct memblock_region *m) 275 { 276 return m->flags & MEMBLOCK_DRIVER_MANAGED; 277 } 278 279 int memblock_search_pfn_nid(unsigned long pfn, unsigned long *start_pfn, 280 unsigned long *end_pfn); 281 void __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 299 void __next_mem_pfn_range_in_zone(u64 *idx, struct zone *zone, 300 unsigned long *out_spfn, 301 unsigned long *out_epfn); 302 303 /** 304 * for_each_free_mem_pfn_range_in_zone_from - iterate through zone specific 305 * free memblock areas from a given point 306 * @i: u64 used as loop variable 307 * @zone: zone in which all of the memory blocks reside 308 * @p_start: ptr to phys_addr_t for start address of the range, can be %NULL 309 * @p_end: ptr to phys_addr_t for end address of the range, can be %NULL 310 * 311 * Walks over free (memory && !reserved) areas of memblock in a specific 312 * zone, continuing from current position. Available as soon as memblock is 313 * initialized. 314 */ 315 #define for_each_free_mem_pfn_range_in_zone_from(i, zone, p_start, p_end) \ 316 for (; i != U64_MAX; \ 317 __next_mem_pfn_range_in_zone(&i, zone, p_start, p_end)) 318 319 #endif /* CONFIG_DEFERRED_STRUCT_PAGE_INIT */ 320 321 /** 322 * for_each_free_mem_range - iterate through free memblock areas 323 * @i: u64 used as loop variable 324 * @nid: node selector, %NUMA_NO_NODE for all nodes 325 * @flags: pick from blocks based on memory attributes 326 * @p_start: ptr to phys_addr_t for start address of the range, can be %NULL 327 * @p_end: ptr to phys_addr_t for end address of the range, can be %NULL 328 * @p_nid: ptr to int for nid of the range, can be %NULL 329 * 330 * Walks over free (memory && !reserved) areas of memblock. Available as 331 * soon as memblock is initialized. 332 */ 333 #define for_each_free_mem_range(i, nid, flags, p_start, p_end, p_nid) \ 334 __for_each_mem_range(i, &memblock.memory, &memblock.reserved, \ 335 nid, flags, p_start, p_end, p_nid) 336 337 /** 338 * for_each_free_mem_range_reverse - rev-iterate through free memblock areas 339 * @i: u64 used as loop variable 340 * @nid: node selector, %NUMA_NO_NODE for all nodes 341 * @flags: pick from blocks based on memory attributes 342 * @p_start: ptr to phys_addr_t for start address of the range, can be %NULL 343 * @p_end: ptr to phys_addr_t for end address of the range, can be %NULL 344 * @p_nid: ptr to int for nid of the range, can be %NULL 345 * 346 * Walks over free (memory && !reserved) areas of memblock in reverse 347 * order. Available as soon as memblock is initialized. 348 */ 349 #define for_each_free_mem_range_reverse(i, nid, flags, p_start, p_end, \ 350 p_nid) \ 351 __for_each_mem_range_rev(i, &memblock.memory, &memblock.reserved, \ 352 nid, flags, p_start, p_end, p_nid) 353 354 int memblock_set_node(phys_addr_t base, phys_addr_t size, 355 struct memblock_type *type, int nid); 356 357 #ifdef CONFIG_NUMA memblock_set_region_node(struct memblock_region * r,int nid)358 static inline void memblock_set_region_node(struct memblock_region *r, int nid) 359 { 360 r->nid = nid; 361 } 362 memblock_get_region_node(const struct memblock_region * r)363 static inline int memblock_get_region_node(const struct memblock_region *r) 364 { 365 return r->nid; 366 } 367 #else memblock_set_region_node(struct memblock_region * r,int nid)368 static inline void memblock_set_region_node(struct memblock_region *r, int nid) 369 { 370 } 371 memblock_get_region_node(const struct memblock_region * r)372 static inline int memblock_get_region_node(const struct memblock_region *r) 373 { 374 return 0; 375 } 376 #endif /* CONFIG_NUMA */ 377 378 /* Flags for memblock allocation APIs */ 379 #define MEMBLOCK_ALLOC_ANYWHERE (~(phys_addr_t)0) 380 #define MEMBLOCK_ALLOC_ACCESSIBLE 0 381 #define MEMBLOCK_ALLOC_NOLEAKTRACE 1 382 383 /* We are using top down, so it is safe to use 0 here */ 384 #define MEMBLOCK_LOW_LIMIT 0 385 386 #ifndef ARCH_LOW_ADDRESS_LIMIT 387 #define ARCH_LOW_ADDRESS_LIMIT 0xffffffffUL 388 #endif 389 390 phys_addr_t memblock_phys_alloc_range(phys_addr_t size, phys_addr_t align, 391 phys_addr_t start, phys_addr_t end); 392 phys_addr_t memblock_alloc_range_nid(phys_addr_t size, 393 phys_addr_t align, phys_addr_t start, 394 phys_addr_t end, int nid, bool exact_nid); 395 phys_addr_t memblock_phys_alloc_try_nid(phys_addr_t size, phys_addr_t align, int nid); 396 memblock_phys_alloc(phys_addr_t size,phys_addr_t align)397 static __always_inline phys_addr_t memblock_phys_alloc(phys_addr_t size, 398 phys_addr_t align) 399 { 400 return memblock_phys_alloc_range(size, align, 0, 401 MEMBLOCK_ALLOC_ACCESSIBLE); 402 } 403 404 void *memblock_alloc_exact_nid_raw(phys_addr_t size, phys_addr_t align, 405 phys_addr_t min_addr, phys_addr_t max_addr, 406 int nid); 407 void *memblock_alloc_try_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(phys_addr_t size, phys_addr_t align, 411 phys_addr_t min_addr, phys_addr_t max_addr, 412 int nid); 413 memblock_alloc(phys_addr_t size,phys_addr_t align)414 static __always_inline void *memblock_alloc(phys_addr_t size, phys_addr_t align) 415 { 416 return memblock_alloc_try_nid(size, align, MEMBLOCK_LOW_LIMIT, 417 MEMBLOCK_ALLOC_ACCESSIBLE, NUMA_NO_NODE); 418 } 419 memblock_alloc_raw(phys_addr_t size,phys_addr_t align)420 static inline void *memblock_alloc_raw(phys_addr_t size, 421 phys_addr_t align) 422 { 423 return memblock_alloc_try_nid_raw(size, align, MEMBLOCK_LOW_LIMIT, 424 MEMBLOCK_ALLOC_ACCESSIBLE, 425 NUMA_NO_NODE); 426 } 427 memblock_alloc_from(phys_addr_t size,phys_addr_t align,phys_addr_t min_addr)428 static inline void *memblock_alloc_from(phys_addr_t size, 429 phys_addr_t align, 430 phys_addr_t min_addr) 431 { 432 return memblock_alloc_try_nid(size, align, min_addr, 433 MEMBLOCK_ALLOC_ACCESSIBLE, NUMA_NO_NODE); 434 } 435 memblock_alloc_low(phys_addr_t size,phys_addr_t align)436 static inline void *memblock_alloc_low(phys_addr_t size, 437 phys_addr_t align) 438 { 439 return memblock_alloc_try_nid(size, align, MEMBLOCK_LOW_LIMIT, 440 ARCH_LOW_ADDRESS_LIMIT, NUMA_NO_NODE); 441 } 442 memblock_alloc_node(phys_addr_t size,phys_addr_t align,int nid)443 static inline void *memblock_alloc_node(phys_addr_t size, 444 phys_addr_t align, int nid) 445 { 446 return memblock_alloc_try_nid(size, align, MEMBLOCK_LOW_LIMIT, 447 MEMBLOCK_ALLOC_ACCESSIBLE, nid); 448 } 449 450 /* 451 * Set the allocation direction to bottom-up or top-down. 452 */ memblock_set_bottom_up(bool enable)453 static inline __init_memblock void memblock_set_bottom_up(bool enable) 454 { 455 memblock.bottom_up = enable; 456 } 457 458 /* 459 * Check if the allocation direction is bottom-up or not. 460 * if this is true, that said, memblock will allocate memory 461 * in bottom-up direction. 462 */ memblock_bottom_up(void)463 static inline __init_memblock bool memblock_bottom_up(void) 464 { 465 return memblock.bottom_up; 466 } 467 468 phys_addr_t memblock_phys_mem_size(void); 469 phys_addr_t memblock_reserved_size(void); 470 unsigned long memblock_estimated_nr_free_pages(void); 471 phys_addr_t memblock_start_of_DRAM(void); 472 phys_addr_t memblock_end_of_DRAM(void); 473 void memblock_enforce_memory_limit(phys_addr_t memory_limit); 474 void memblock_cap_memory_range(phys_addr_t base, phys_addr_t size); 475 void memblock_mem_limit_remove_map(phys_addr_t limit); 476 bool memblock_is_memory(phys_addr_t addr); 477 bool memblock_is_map_memory(phys_addr_t addr); 478 bool memblock_is_region_memory(phys_addr_t base, phys_addr_t size); 479 bool memblock_is_reserved(phys_addr_t addr); 480 bool memblock_is_region_reserved(phys_addr_t base, phys_addr_t size); 481 482 void memblock_dump_all(void); 483 484 /** 485 * memblock_set_current_limit - Set the current allocation limit to allow 486 * limiting allocations to what is currently 487 * accessible during boot 488 * @limit: New limit value (physical address) 489 */ 490 void memblock_set_current_limit(phys_addr_t limit); 491 492 493 phys_addr_t memblock_get_current_limit(void); 494 495 /* 496 * pfn conversion functions 497 * 498 * While the memory MEMBLOCKs should always be page aligned, the reserved 499 * MEMBLOCKs may not be. This accessor attempt to provide a very clear 500 * idea of what they return for such non aligned MEMBLOCKs. 501 */ 502 503 /** 504 * memblock_region_memory_base_pfn - get the lowest pfn of the memory region 505 * @reg: memblock_region structure 506 * 507 * Return: the lowest pfn intersecting with the memory region 508 */ memblock_region_memory_base_pfn(const struct memblock_region * reg)509 static inline unsigned long memblock_region_memory_base_pfn(const struct memblock_region *reg) 510 { 511 return PFN_UP(reg->base); 512 } 513 514 /** 515 * memblock_region_memory_end_pfn - get the end pfn of the memory region 516 * @reg: memblock_region structure 517 * 518 * Return: the end_pfn of the reserved region 519 */ memblock_region_memory_end_pfn(const struct memblock_region * reg)520 static inline unsigned long memblock_region_memory_end_pfn(const struct memblock_region *reg) 521 { 522 return PFN_DOWN(reg->base + reg->size); 523 } 524 525 /** 526 * memblock_region_reserved_base_pfn - get the lowest pfn of the reserved region 527 * @reg: memblock_region structure 528 * 529 * Return: the lowest pfn intersecting with the reserved region 530 */ memblock_region_reserved_base_pfn(const struct memblock_region * reg)531 static inline unsigned long memblock_region_reserved_base_pfn(const struct memblock_region *reg) 532 { 533 return PFN_DOWN(reg->base); 534 } 535 536 /** 537 * memblock_region_reserved_end_pfn - get the end pfn of the reserved region 538 * @reg: memblock_region structure 539 * 540 * Return: the end_pfn of the reserved region 541 */ memblock_region_reserved_end_pfn(const struct memblock_region * reg)542 static inline unsigned long memblock_region_reserved_end_pfn(const struct memblock_region *reg) 543 { 544 return PFN_UP(reg->base + reg->size); 545 } 546 547 /** 548 * for_each_mem_region - iterate over memory regions 549 * @region: loop variable 550 */ 551 #define for_each_mem_region(region) \ 552 for (region = memblock.memory.regions; \ 553 region < (memblock.memory.regions + memblock.memory.cnt); \ 554 region++) 555 556 /** 557 * for_each_reserved_mem_region - itereate over reserved memory regions 558 * @region: loop variable 559 */ 560 #define for_each_reserved_mem_region(region) \ 561 for (region = memblock.reserved.regions; \ 562 region < (memblock.reserved.regions + memblock.reserved.cnt); \ 563 region++) 564 565 extern void *alloc_large_system_hash(const char *tablename, 566 unsigned long bucketsize, 567 unsigned long numentries, 568 int scale, 569 int flags, 570 unsigned int *_hash_shift, 571 unsigned int *_hash_mask, 572 unsigned long low_limit, 573 unsigned long high_limit); 574 575 #define HASH_EARLY 0x00000001 /* Allocating during early boot? */ 576 #define HASH_ZERO 0x00000002 /* Zero allocated hash table */ 577 578 /* Only NUMA needs hash distribution. 64bit NUMA architectures have 579 * sufficient vmalloc space. 580 */ 581 #ifdef CONFIG_NUMA 582 #define HASHDIST_DEFAULT IS_ENABLED(CONFIG_64BIT) 583 extern int hashdist; /* Distribute hashes across NUMA nodes? */ 584 #else 585 #define hashdist (0) 586 #endif 587 588 #ifdef CONFIG_MEMTEST 589 void early_memtest(phys_addr_t start, phys_addr_t end); 590 void memtest_report_meminfo(struct seq_file *m); 591 #else early_memtest(phys_addr_t start,phys_addr_t end)592 static inline void early_memtest(phys_addr_t start, phys_addr_t end) { } memtest_report_meminfo(struct seq_file * m)593 static inline void memtest_report_meminfo(struct seq_file *m) { } 594 #endif 595 596 597 #endif /* _LINUX_MEMBLOCK_H */ 598