| 1 | #ifndef _LINUX_MEMBLOCK_H |
| 2 | #define _LINUX_MEMBLOCK_H |
| 3 | #ifdef __KERNEL__ |
| 4 | |
| 5 | #ifdef CONFIG_HAVE_MEMBLOCK |
| 6 | /* |
| 7 | * Logical memory blocks. |
| 8 | * |
| 9 | * Copyright (C) 2001 Peter Bergner, IBM Corp. |
| 10 | * |
| 11 | * This program is free software; you can redistribute it and/or |
| 12 | * modify it under the terms of the GNU General Public License |
| 13 | * as published by the Free Software Foundation; either version |
| 14 | * 2 of the License, or (at your option) any later version. |
| 15 | */ |
| 16 | |
| 17 | #include <linux/init.h> |
| 18 | #include <linux/mm.h> |
| 19 | |
| 20 | #define INIT_MEMBLOCK_REGIONS 128 |
| 21 | #define INIT_PHYSMEM_REGIONS 4 |
| 22 | |
| 23 | /* Definition of memblock flags. */ |
| 24 | enum { |
| 25 | MEMBLOCK_NONE = 0x0, /* No special request */ |
| 26 | MEMBLOCK_HOTPLUG = 0x1, /* hotpluggable region */ |
| 27 | MEMBLOCK_MIRROR = 0x2, /* mirrored region */ |
| 28 | MEMBLOCK_NOMAP = 0x4, /* don't add to kernel direct mapping */ |
| 29 | }; |
| 30 | |
| 31 | struct memblock_region { |
| 32 | phys_addr_t base; |
| 33 | phys_addr_t size; |
| 34 | unsigned long flags; |
| 35 | #ifdef CONFIG_HAVE_MEMBLOCK_NODE_MAP |
| 36 | int nid; |
| 37 | #endif |
| 38 | }; |
| 39 | |
| 40 | struct memblock_type { |
| 41 | unsigned long cnt; /* number of regions */ |
| 42 | unsigned long max; /* size of the allocated array */ |
| 43 | phys_addr_t total_size; /* size of all regions */ |
| 44 | struct memblock_region *regions; |
| 45 | }; |
| 46 | |
| 47 | struct memblock { |
| 48 | bool bottom_up; /* is bottom up direction? */ |
| 49 | phys_addr_t current_limit; |
| 50 | struct memblock_type memory; |
| 51 | struct memblock_type reserved; |
| 52 | #ifdef CONFIG_HAVE_MEMBLOCK_PHYS_MAP |
| 53 | struct memblock_type physmem; |
| 54 | #endif |
| 55 | }; |
| 56 | |
| 57 | extern struct memblock memblock; |
| 58 | extern int memblock_debug; |
| 59 | #ifdef CONFIG_MOVABLE_NODE |
| 60 | /* If movable_node boot option specified */ |
| 61 | extern bool movable_node_enabled; |
| 62 | #endif /* CONFIG_MOVABLE_NODE */ |
| 63 | |
| 64 | #ifdef CONFIG_ARCH_DISCARD_MEMBLOCK |
| 65 | #define __init_memblock __meminit |
| 66 | #define __initdata_memblock __meminitdata |
| 67 | #else |
| 68 | #define __init_memblock |
| 69 | #define __initdata_memblock |
| 70 | #endif |
| 71 | |
| 72 | #define memblock_dbg(fmt, ...) \ |
| 73 | if (memblock_debug) printk(KERN_INFO pr_fmt(fmt), ##__VA_ARGS__) |
| 74 | |
| 75 | phys_addr_t memblock_find_in_range_node(phys_addr_t size, phys_addr_t align, |
| 76 | phys_addr_t start, phys_addr_t end, |
| 77 | int nid, ulong flags); |
| 78 | phys_addr_t memblock_find_in_range(phys_addr_t start, phys_addr_t end, |
| 79 | phys_addr_t size, phys_addr_t align); |
| 80 | phys_addr_t get_allocated_memblock_reserved_regions_info(phys_addr_t *addr); |
| 81 | phys_addr_t get_allocated_memblock_memory_regions_info(phys_addr_t *addr); |
| 82 | void memblock_allow_resize(void); |
| 83 | int memblock_add_node(phys_addr_t base, phys_addr_t size, int nid); |
| 84 | int memblock_add(phys_addr_t base, phys_addr_t size); |
| 85 | int memblock_remove(phys_addr_t base, phys_addr_t size); |
| 86 | int memblock_free(phys_addr_t base, phys_addr_t size); |
| 87 | int memblock_reserve(phys_addr_t base, phys_addr_t size); |
| 88 | void memblock_trim_memory(phys_addr_t align); |
| 89 | bool memblock_overlaps_region(struct memblock_type *type, |
| 90 | phys_addr_t base, phys_addr_t size); |
| 91 | int memblock_mark_hotplug(phys_addr_t base, phys_addr_t size); |
| 92 | int memblock_clear_hotplug(phys_addr_t base, phys_addr_t size); |
| 93 | int memblock_mark_mirror(phys_addr_t base, phys_addr_t size); |
| 94 | int memblock_mark_nomap(phys_addr_t base, phys_addr_t size); |
| 95 | ulong choose_memblock_flags(void); |
| 96 | |
| 97 | /* Low level functions */ |
| 98 | int memblock_add_range(struct memblock_type *type, |
| 99 | phys_addr_t base, phys_addr_t size, |
| 100 | int nid, unsigned long flags); |
| 101 | |
| 102 | void __next_mem_range(u64 *idx, int nid, ulong flags, |
| 103 | struct memblock_type *type_a, |
| 104 | struct memblock_type *type_b, phys_addr_t *out_start, |
| 105 | phys_addr_t *out_end, int *out_nid); |
| 106 | |
| 107 | void __next_mem_range_rev(u64 *idx, int nid, ulong flags, |
| 108 | struct memblock_type *type_a, |
| 109 | struct memblock_type *type_b, phys_addr_t *out_start, |
| 110 | phys_addr_t *out_end, int *out_nid); |
| 111 | |
| 112 | void __next_reserved_mem_region(u64 *idx, phys_addr_t *out_start, |
| 113 | phys_addr_t *out_end); |
| 114 | |
| 115 | /** |
| 116 | * for_each_mem_range - iterate through memblock areas from type_a and not |
| 117 | * included in type_b. Or just type_a if type_b is NULL. |
| 118 | * @i: u64 used as loop variable |
| 119 | * @type_a: ptr to memblock_type to iterate |
| 120 | * @type_b: ptr to memblock_type which excludes from the iteration |
| 121 | * @nid: node selector, %NUMA_NO_NODE for all nodes |
| 122 | * @flags: pick from blocks based on memory attributes |
| 123 | * @p_start: ptr to phys_addr_t for start address of the range, can be %NULL |
| 124 | * @p_end: ptr to phys_addr_t for end address of the range, can be %NULL |
| 125 | * @p_nid: ptr to int for nid of the range, can be %NULL |
| 126 | */ |
| 127 | #define for_each_mem_range(i, type_a, type_b, nid, flags, \ |
| 128 | p_start, p_end, p_nid) \ |
| 129 | for (i = 0, __next_mem_range(&i, nid, flags, type_a, type_b, \ |
| 130 | p_start, p_end, p_nid); \ |
| 131 | i != (u64)ULLONG_MAX; \ |
| 132 | __next_mem_range(&i, nid, flags, type_a, type_b, \ |
| 133 | p_start, p_end, p_nid)) |
| 134 | |
| 135 | /** |
| 136 | * for_each_mem_range_rev - reverse iterate through memblock areas from |
| 137 | * type_a and not included in type_b. Or just type_a if type_b is NULL. |
| 138 | * @i: u64 used as loop variable |
| 139 | * @type_a: ptr to memblock_type to iterate |
| 140 | * @type_b: ptr to memblock_type which excludes from the iteration |
| 141 | * @nid: node selector, %NUMA_NO_NODE for all nodes |
| 142 | * @flags: pick from blocks based on memory attributes |
| 143 | * @p_start: ptr to phys_addr_t for start address of the range, can be %NULL |
| 144 | * @p_end: ptr to phys_addr_t for end address of the range, can be %NULL |
| 145 | * @p_nid: ptr to int for nid of the range, can be %NULL |
| 146 | */ |
| 147 | #define for_each_mem_range_rev(i, type_a, type_b, nid, flags, \ |
| 148 | p_start, p_end, p_nid) \ |
| 149 | for (i = (u64)ULLONG_MAX, \ |
| 150 | __next_mem_range_rev(&i, nid, flags, type_a, type_b,\ |
| 151 | p_start, p_end, p_nid); \ |
| 152 | i != (u64)ULLONG_MAX; \ |
| 153 | __next_mem_range_rev(&i, nid, flags, type_a, type_b, \ |
| 154 | p_start, p_end, p_nid)) |
| 155 | |
| 156 | /** |
| 157 | * for_each_reserved_mem_region - iterate over all reserved memblock areas |
| 158 | * @i: u64 used as loop variable |
| 159 | * @p_start: ptr to phys_addr_t for start address of the range, can be %NULL |
| 160 | * @p_end: ptr to phys_addr_t for end address of the range, can be %NULL |
| 161 | * |
| 162 | * Walks over reserved areas of memblock. Available as soon as memblock |
| 163 | * is initialized. |
| 164 | */ |
| 165 | #define for_each_reserved_mem_region(i, p_start, p_end) \ |
| 166 | for (i = 0UL, __next_reserved_mem_region(&i, p_start, p_end); \ |
| 167 | i != (u64)ULLONG_MAX; \ |
| 168 | __next_reserved_mem_region(&i, p_start, p_end)) |
| 169 | |
| 170 | #ifdef CONFIG_MOVABLE_NODE |
| 171 | static inline bool memblock_is_hotpluggable(struct memblock_region *m) |
| 172 | { |
| 173 | return m->flags & MEMBLOCK_HOTPLUG; |
| 174 | } |
| 175 | |
| 176 | static inline bool __init_memblock movable_node_is_enabled(void) |
| 177 | { |
| 178 | return movable_node_enabled; |
| 179 | } |
| 180 | #else |
| 181 | static inline bool memblock_is_hotpluggable(struct memblock_region *m) |
| 182 | { |
| 183 | return false; |
| 184 | } |
| 185 | static inline bool movable_node_is_enabled(void) |
| 186 | { |
| 187 | return false; |
| 188 | } |
| 189 | #endif |
| 190 | |
| 191 | static inline bool memblock_is_mirror(struct memblock_region *m) |
| 192 | { |
| 193 | return m->flags & MEMBLOCK_MIRROR; |
| 194 | } |
| 195 | |
| 196 | static inline bool memblock_is_nomap(struct memblock_region *m) |
| 197 | { |
| 198 | return m->flags & MEMBLOCK_NOMAP; |
| 199 | } |
| 200 | |
| 201 | #ifdef CONFIG_HAVE_MEMBLOCK_NODE_MAP |
| 202 | int memblock_search_pfn_nid(unsigned long pfn, unsigned long *start_pfn, |
| 203 | unsigned long *end_pfn); |
| 204 | void __next_mem_pfn_range(int *idx, int nid, unsigned long *out_start_pfn, |
| 205 | unsigned long *out_end_pfn, int *out_nid); |
| 206 | |
| 207 | /** |
| 208 | * for_each_mem_pfn_range - early memory pfn range iterator |
| 209 | * @i: an integer used as loop variable |
| 210 | * @nid: node selector, %MAX_NUMNODES for all nodes |
| 211 | * @p_start: ptr to ulong for start pfn of the range, can be %NULL |
| 212 | * @p_end: ptr to ulong for end pfn of the range, can be %NULL |
| 213 | * @p_nid: ptr to int for nid of the range, can be %NULL |
| 214 | * |
| 215 | * Walks over configured memory ranges. |
| 216 | */ |
| 217 | #define for_each_mem_pfn_range(i, nid, p_start, p_end, p_nid) \ |
| 218 | for (i = -1, __next_mem_pfn_range(&i, nid, p_start, p_end, p_nid); \ |
| 219 | i >= 0; __next_mem_pfn_range(&i, nid, p_start, p_end, p_nid)) |
| 220 | #endif /* CONFIG_HAVE_MEMBLOCK_NODE_MAP */ |
| 221 | |
| 222 | /** |
| 223 | * for_each_free_mem_range - iterate through free memblock areas |
| 224 | * @i: u64 used as loop variable |
| 225 | * @nid: node selector, %NUMA_NO_NODE for all nodes |
| 226 | * @flags: pick from blocks based on memory attributes |
| 227 | * @p_start: ptr to phys_addr_t for start address of the range, can be %NULL |
| 228 | * @p_end: ptr to phys_addr_t for end address of the range, can be %NULL |
| 229 | * @p_nid: ptr to int for nid of the range, can be %NULL |
| 230 | * |
| 231 | * Walks over free (memory && !reserved) areas of memblock. Available as |
| 232 | * soon as memblock is initialized. |
| 233 | */ |
| 234 | #define for_each_free_mem_range(i, nid, flags, p_start, p_end, p_nid) \ |
| 235 | for_each_mem_range(i, &memblock.memory, &memblock.reserved, \ |
| 236 | nid, flags, p_start, p_end, p_nid) |
| 237 | |
| 238 | /** |
| 239 | * for_each_free_mem_range_reverse - rev-iterate through free memblock areas |
| 240 | * @i: u64 used as loop variable |
| 241 | * @nid: node selector, %NUMA_NO_NODE for all nodes |
| 242 | * @flags: pick from blocks based on memory attributes |
| 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 | * @p_nid: ptr to int for nid of the range, can be %NULL |
| 246 | * |
| 247 | * Walks over free (memory && !reserved) areas of memblock in reverse |
| 248 | * order. Available as soon as memblock is initialized. |
| 249 | */ |
| 250 | #define for_each_free_mem_range_reverse(i, nid, flags, p_start, p_end, \ |
| 251 | p_nid) \ |
| 252 | for_each_mem_range_rev(i, &memblock.memory, &memblock.reserved, \ |
| 253 | nid, flags, p_start, p_end, p_nid) |
| 254 | |
| 255 | static inline void memblock_set_region_flags(struct memblock_region *r, |
| 256 | unsigned long flags) |
| 257 | { |
| 258 | r->flags |= flags; |
| 259 | } |
| 260 | |
| 261 | static inline void memblock_clear_region_flags(struct memblock_region *r, |
| 262 | unsigned long flags) |
| 263 | { |
| 264 | r->flags &= ~flags; |
| 265 | } |
| 266 | |
| 267 | #ifdef CONFIG_HAVE_MEMBLOCK_NODE_MAP |
| 268 | int memblock_set_node(phys_addr_t base, phys_addr_t size, |
| 269 | struct memblock_type *type, int nid); |
| 270 | |
| 271 | static inline void memblock_set_region_node(struct memblock_region *r, int nid) |
| 272 | { |
| 273 | r->nid = nid; |
| 274 | } |
| 275 | |
| 276 | static inline int memblock_get_region_node(const struct memblock_region *r) |
| 277 | { |
| 278 | return r->nid; |
| 279 | } |
| 280 | #else |
| 281 | static inline void memblock_set_region_node(struct memblock_region *r, int nid) |
| 282 | { |
| 283 | } |
| 284 | |
| 285 | static inline int memblock_get_region_node(const struct memblock_region *r) |
| 286 | { |
| 287 | return 0; |
| 288 | } |
| 289 | #endif /* CONFIG_HAVE_MEMBLOCK_NODE_MAP */ |
| 290 | |
| 291 | phys_addr_t memblock_alloc_nid(phys_addr_t size, phys_addr_t align, int nid); |
| 292 | phys_addr_t memblock_alloc_try_nid(phys_addr_t size, phys_addr_t align, int nid); |
| 293 | |
| 294 | phys_addr_t memblock_alloc(phys_addr_t size, phys_addr_t align); |
| 295 | |
| 296 | #ifdef CONFIG_MOVABLE_NODE |
| 297 | /* |
| 298 | * Set the allocation direction to bottom-up or top-down. |
| 299 | */ |
| 300 | static inline void __init memblock_set_bottom_up(bool enable) |
| 301 | { |
| 302 | memblock.bottom_up = enable; |
| 303 | } |
| 304 | |
| 305 | /* |
| 306 | * Check if the allocation direction is bottom-up or not. |
| 307 | * if this is true, that said, memblock will allocate memory |
| 308 | * in bottom-up direction. |
| 309 | */ |
| 310 | static inline bool memblock_bottom_up(void) |
| 311 | { |
| 312 | return memblock.bottom_up; |
| 313 | } |
| 314 | #else |
| 315 | static inline void __init memblock_set_bottom_up(bool enable) {} |
| 316 | static inline bool memblock_bottom_up(void) { return false; } |
| 317 | #endif |
| 318 | |
| 319 | /* Flags for memblock_alloc_base() amd __memblock_alloc_base() */ |
| 320 | #define MEMBLOCK_ALLOC_ANYWHERE (~(phys_addr_t)0) |
| 321 | #define MEMBLOCK_ALLOC_ACCESSIBLE 0 |
| 322 | |
| 323 | phys_addr_t __init memblock_alloc_range(phys_addr_t size, phys_addr_t align, |
| 324 | phys_addr_t start, phys_addr_t end, |
| 325 | ulong flags); |
| 326 | phys_addr_t memblock_alloc_base(phys_addr_t size, phys_addr_t align, |
| 327 | phys_addr_t max_addr); |
| 328 | phys_addr_t __memblock_alloc_base(phys_addr_t size, phys_addr_t align, |
| 329 | phys_addr_t max_addr); |
| 330 | phys_addr_t memblock_phys_mem_size(void); |
| 331 | phys_addr_t memblock_mem_size(unsigned long limit_pfn); |
| 332 | phys_addr_t memblock_start_of_DRAM(void); |
| 333 | phys_addr_t memblock_end_of_DRAM(void); |
| 334 | void memblock_enforce_memory_limit(phys_addr_t memory_limit); |
| 335 | void memblock_mem_limit_remove_map(phys_addr_t limit); |
| 336 | bool memblock_is_memory(phys_addr_t addr); |
| 337 | int memblock_is_map_memory(phys_addr_t addr); |
| 338 | int memblock_is_region_memory(phys_addr_t base, phys_addr_t size); |
| 339 | bool memblock_is_reserved(phys_addr_t addr); |
| 340 | bool memblock_is_region_reserved(phys_addr_t base, phys_addr_t size); |
| 341 | |
| 342 | extern void __memblock_dump_all(void); |
| 343 | |
| 344 | static inline void memblock_dump_all(void) |
| 345 | { |
| 346 | if (memblock_debug) |
| 347 | __memblock_dump_all(); |
| 348 | } |
| 349 | |
| 350 | /** |
| 351 | * memblock_set_current_limit - Set the current allocation limit to allow |
| 352 | * limiting allocations to what is currently |
| 353 | * accessible during boot |
| 354 | * @limit: New limit value (physical address) |
| 355 | */ |
| 356 | void memblock_set_current_limit(phys_addr_t limit); |
| 357 | |
| 358 | |
| 359 | phys_addr_t memblock_get_current_limit(void); |
| 360 | |
| 361 | /* |
| 362 | * pfn conversion functions |
| 363 | * |
| 364 | * While the memory MEMBLOCKs should always be page aligned, the reserved |
| 365 | * MEMBLOCKs may not be. This accessor attempt to provide a very clear |
| 366 | * idea of what they return for such non aligned MEMBLOCKs. |
| 367 | */ |
| 368 | |
| 369 | /** |
| 370 | * memblock_region_memory_base_pfn - Return the lowest pfn intersecting with the memory region |
| 371 | * @reg: memblock_region structure |
| 372 | */ |
| 373 | static inline unsigned long memblock_region_memory_base_pfn(const struct memblock_region *reg) |
| 374 | { |
| 375 | return PFN_UP(reg->base); |
| 376 | } |
| 377 | |
| 378 | /** |
| 379 | * memblock_region_memory_end_pfn - Return the end_pfn this region |
| 380 | * @reg: memblock_region structure |
| 381 | */ |
| 382 | static inline unsigned long memblock_region_memory_end_pfn(const struct memblock_region *reg) |
| 383 | { |
| 384 | return PFN_DOWN(reg->base + reg->size); |
| 385 | } |
| 386 | |
| 387 | /** |
| 388 | * memblock_region_reserved_base_pfn - Return the lowest pfn intersecting with the reserved region |
| 389 | * @reg: memblock_region structure |
| 390 | */ |
| 391 | static inline unsigned long memblock_region_reserved_base_pfn(const struct memblock_region *reg) |
| 392 | { |
| 393 | return PFN_DOWN(reg->base); |
| 394 | } |
| 395 | |
| 396 | /** |
| 397 | * memblock_region_reserved_end_pfn - Return the end_pfn this region |
| 398 | * @reg: memblock_region structure |
| 399 | */ |
| 400 | static inline unsigned long memblock_region_reserved_end_pfn(const struct memblock_region *reg) |
| 401 | { |
| 402 | return PFN_UP(reg->base + reg->size); |
| 403 | } |
| 404 | |
| 405 | #define for_each_memblock(memblock_type, region) \ |
| 406 | for (region = memblock.memblock_type.regions; \ |
| 407 | region < (memblock.memblock_type.regions + memblock.memblock_type.cnt); \ |
| 408 | region++) |
| 409 | |
| 410 | #define for_each_memblock_type(memblock_type, rgn) \ |
| 411 | for (idx = 0, rgn = &memblock_type->regions[0]; \ |
| 412 | idx < memblock_type->cnt; \ |
| 413 | idx++, rgn = &memblock_type->regions[idx]) |
| 414 | |
| 415 | #ifdef CONFIG_MEMTEST |
| 416 | extern void early_memtest(phys_addr_t start, phys_addr_t end); |
| 417 | #else |
| 418 | static inline void early_memtest(phys_addr_t start, phys_addr_t end) |
| 419 | { |
| 420 | } |
| 421 | #endif |
| 422 | |
| 423 | #else |
| 424 | static inline phys_addr_t memblock_alloc(phys_addr_t size, phys_addr_t align) |
| 425 | { |
| 426 | return 0; |
| 427 | } |
| 428 | |
| 429 | #endif /* CONFIG_HAVE_MEMBLOCK */ |
| 430 | |
| 431 | #endif /* __KERNEL__ */ |
| 432 | |
| 433 | #endif /* _LINUX_MEMBLOCK_H */ |