include/linux/bootmem.h

   1 /* SPDX-License-Identifier: GPL-2.0 */
   2 /*
   3  * Discontiguous memory support, Kanoj Sarcar, SGI, Nov 1999
   4  */
   5 #ifndef _LINUX_BOOTMEM_H
   6 #define _LINUX_BOOTMEM_H
   7
   8 #include <linux/mmzone.h>
   9 #include <linux/mm_types.h>
  10 #include <asm/dma.h>
  11 #include <asm/processor.h>
  12
  13 /*
  14  *  simple boot-time physical memory area allocator.
  15  */
  16
  17 extern unsigned long max_low_pfn;
  18 extern unsigned long min_low_pfn;
  19
  20 /*
  21  * highest page
  22  */
  23 extern unsigned long max_pfn;
  24 /*
  25  * highest possible page
  26  */
  27 extern unsigned long long max_possible_pfn;
  28
  29 #ifndef CONFIG_NO_BOOTMEM
  30 /*
  31  * node_bootmem_map is a map pointer - the bits represent all physical
  32  * memory pages (including holes) on the node.
  33  */
  34 typedef struct bootmem_data {
  35         unsigned long node_min_pfn;
  36         unsigned long node_low_pfn;
  37         void *node_bootmem_map;
  38         unsigned long last_end_off;
  39         unsigned long hint_idx;
  40         struct list_head list;
  41 } bootmem_data_t;
  42
  43 extern bootmem_data_t bootmem_node_data[];
  44 #endif
  45
  46 extern unsigned long bootmem_bootmap_pages(unsigned long);
  47
  48 extern unsigned long init_bootmem_node(pg_data_t *pgdat,
  49                                        unsigned long freepfn,
  50                                        unsigned long startpfn,
  51                                        unsigned long endpfn);
  52 extern unsigned long init_bootmem(unsigned long addr, unsigned long memend);
  53
  54 extern unsigned long free_all_bootmem(void);
  55 extern void reset_node_managed_pages(pg_data_t *pgdat);
  56 extern void reset_all_zones_managed_pages(void);
  57
  58 extern void free_bootmem_node(pg_data_t *pgdat,
  59                               unsigned long addr,
  60                               unsigned long size);
  61 extern void free_bootmem(unsigned long physaddr, unsigned long size);
  62 extern void free_bootmem_late(unsigned long physaddr, unsigned long size);
  63
  64 /*
  65  * Flags for reserve_bootmem (also if CONFIG_HAVE_ARCH_BOOTMEM_NODE,
  66  * the architecture-specific code should honor this).
  67  *
  68  * If flags is BOOTMEM_DEFAULT, then the return value is always 0 (success).
  69  * If flags contains BOOTMEM_EXCLUSIVE, then -EBUSY is returned if the memory
  70  * already was reserved.
  71  */
  72 #define BOOTMEM_DEFAULT         0
  73 #define BOOTMEM_EXCLUSIVE       (1<<0)
  74
  75 extern int reserve_bootmem(unsigned long addr,
  76                            unsigned long size,
  77                            int flags);
  78 extern int reserve_bootmem_node(pg_data_t *pgdat,
  79                                 unsigned long physaddr,
  80                                 unsigned long size,
  81                                 int flags);
  82
  83 extern void *__alloc_bootmem(unsigned long size,
  84                              unsigned long align,
  85                              unsigned long goal);
  86 extern void *__alloc_bootmem_nopanic(unsigned long size,
  87                                      unsigned long align,
  88                                      unsigned long goal) __malloc;
  89 extern void *__alloc_bootmem_node(pg_data_t *pgdat,
  90                                   unsigned long size,
  91                                   unsigned long align,
  92                                   unsigned long goal) __malloc;
  93 void *__alloc_bootmem_node_high(pg_data_t *pgdat,
  94                                   unsigned long size,
  95                                   unsigned long align,
  96                                   unsigned long goal) __malloc;
  97 extern void *__alloc_bootmem_node_nopanic(pg_data_t *pgdat,
  98                                   unsigned long size,
  99                                   unsigned long align,
 100                                   unsigned long goal) __malloc;
 101 void *___alloc_bootmem_node_nopanic(pg_data_t *pgdat,
 102                                   unsigned long size,
 103                                   unsigned long align,
 104                                   unsigned long goal,
 105                                   unsigned long limit) __malloc;
 106 extern void *__alloc_bootmem_low(unsigned long size,
 107                                  unsigned long align,
 108                                  unsigned long goal) __malloc;
 109 void *__alloc_bootmem_low_nopanic(unsigned long size,
 110                                  unsigned long align,
 111                                  unsigned long goal) __malloc;
 112 extern void *__alloc_bootmem_low_node(pg_data_t *pgdat,
 113                                       unsigned long size,
 114                                       unsigned long align,
 115                                       unsigned long goal) __malloc;
 116
 117 #ifdef CONFIG_NO_BOOTMEM
 118 /* We are using top down, so it is safe to use 0 here */
 119 #define BOOTMEM_LOW_LIMIT 0
 120 #else
 121 #define BOOTMEM_LOW_LIMIT __pa(MAX_DMA_ADDRESS)
 122 #endif
 123
 124 #ifndef ARCH_LOW_ADDRESS_LIMIT
 125 #define ARCH_LOW_ADDRESS_LIMIT  0xffffffffUL
 126 #endif
 127
 128 #define alloc_bootmem(x) \
 129         __alloc_bootmem(x, SMP_CACHE_BYTES, BOOTMEM_LOW_LIMIT)
 130 #define alloc_bootmem_align(x, align) \
 131         __alloc_bootmem(x, align, BOOTMEM_LOW_LIMIT)
 132 #define alloc_bootmem_nopanic(x) \
 133         __alloc_bootmem_nopanic(x, SMP_CACHE_BYTES, BOOTMEM_LOW_LIMIT)
 134 #define alloc_bootmem_pages(x) \
 135         __alloc_bootmem(x, PAGE_SIZE, BOOTMEM_LOW_LIMIT)
 136 #define alloc_bootmem_pages_nopanic(x) \
 137         __alloc_bootmem_nopanic(x, PAGE_SIZE, BOOTMEM_LOW_LIMIT)
 138 #define alloc_bootmem_node(pgdat, x) \
 139         __alloc_bootmem_node(pgdat, x, SMP_CACHE_BYTES, BOOTMEM_LOW_LIMIT)
 140 #define alloc_bootmem_node_nopanic(pgdat, x) \
 141         __alloc_bootmem_node_nopanic(pgdat, x, SMP_CACHE_BYTES, BOOTMEM_LOW_LIMIT)
 142 #define alloc_bootmem_pages_node(pgdat, x) \
 143         __alloc_bootmem_node(pgdat, x, PAGE_SIZE, BOOTMEM_LOW_LIMIT)
 144 #define alloc_bootmem_pages_node_nopanic(pgdat, x) \
 145         __alloc_bootmem_node_nopanic(pgdat, x, PAGE_SIZE, BOOTMEM_LOW_LIMIT)
 146
 147 #define alloc_bootmem_low(x) \
 148         __alloc_bootmem_low(x, SMP_CACHE_BYTES, 0)
 149 #define alloc_bootmem_low_pages_nopanic(x) \
 150         __alloc_bootmem_low_nopanic(x, PAGE_SIZE, 0)
 151 #define alloc_bootmem_low_pages(x) \
 152         __alloc_bootmem_low(x, PAGE_SIZE, 0)
 153 #define alloc_bootmem_low_pages_node(pgdat, x) \
 154         __alloc_bootmem_low_node(pgdat, x, PAGE_SIZE, 0)
 155
 156
 157 #if defined(CONFIG_HAVE_MEMBLOCK) && defined(CONFIG_NO_BOOTMEM)
 158
 159 /* FIXME: use MEMBLOCK_ALLOC_* variants here */
 160 #define BOOTMEM_ALLOC_ACCESSIBLE        0
 161 #define BOOTMEM_ALLOC_ANYWHERE          (~(phys_addr_t)0)
 162
 163 /* FIXME: Move to memblock.h at a point where we remove nobootmem.c */
 164 void *memblock_virt_alloc_try_nid_nopanic(phys_addr_t size,
 165                 phys_addr_t align, phys_addr_t min_addr,
 166                 phys_addr_t max_addr, int nid);
 167 void *memblock_virt_alloc_try_nid(phys_addr_t size, phys_addr_t align,
 168                 phys_addr_t min_addr, phys_addr_t max_addr, int nid);
 169 void __memblock_free_early(phys_addr_t base, phys_addr_t size);
 170 void __memblock_free_late(phys_addr_t base, phys_addr_t size);
 171
 172 static inline void * __init memblock_virt_alloc(
 173                                         phys_addr_t size,  phys_addr_t align)
 174 {
 175         return memblock_virt_alloc_try_nid(size, align, BOOTMEM_LOW_LIMIT,
 176                                             BOOTMEM_ALLOC_ACCESSIBLE,
 177                                             NUMA_NO_NODE);
 178 }
 179
 180 static inline void * __init memblock_virt_alloc_nopanic(
 181                                         phys_addr_t size, phys_addr_t align)
 182 {
 183         return memblock_virt_alloc_try_nid_nopanic(size, align,
 184                                                     BOOTMEM_LOW_LIMIT,
 185                                                     BOOTMEM_ALLOC_ACCESSIBLE,
 186                                                     NUMA_NO_NODE);
 187 }
 188
 189 static inline void * __init memblock_virt_alloc_low(
 190                                         phys_addr_t size, phys_addr_t align)
 191 {
 192         return memblock_virt_alloc_try_nid(size, align,
 193                                                    BOOTMEM_LOW_LIMIT,
 194                                                    ARCH_LOW_ADDRESS_LIMIT,
 195                                                    NUMA_NO_NODE);
 196 }
 197 static inline void * __init memblock_virt_alloc_low_nopanic(
 198                                         phys_addr_t size, phys_addr_t align)
 199 {
 200         return memblock_virt_alloc_try_nid_nopanic(size, align,
 201                                                    BOOTMEM_LOW_LIMIT,
 202                                                    ARCH_LOW_ADDRESS_LIMIT,
 203                                                    NUMA_NO_NODE);
 204 }
 205
 206 static inline void * __init memblock_virt_alloc_from_nopanic(
 207                 phys_addr_t size, phys_addr_t align, phys_addr_t min_addr)
 208 {
 209         return memblock_virt_alloc_try_nid_nopanic(size, align, min_addr,
 210                                                     BOOTMEM_ALLOC_ACCESSIBLE,
 211                                                     NUMA_NO_NODE);
 212 }
 213
 214 static inline void * __init memblock_virt_alloc_node(
 215                                                 phys_addr_t size, int nid)
 216 {
 217         return memblock_virt_alloc_try_nid(size, 0, BOOTMEM_LOW_LIMIT,
 218                                             BOOTMEM_ALLOC_ACCESSIBLE, nid);
 219 }
 220
 221 static inline void * __init memblock_virt_alloc_node_nopanic(
 222                                                 phys_addr_t size, int nid)
 223 {
 224         return memblock_virt_alloc_try_nid_nopanic(size, 0, BOOTMEM_LOW_LIMIT,
 225                                                     BOOTMEM_ALLOC_ACCESSIBLE,
 226                                                     nid);
 227 }
 228
 229 static inline void __init memblock_free_early(
 230                                         phys_addr_t base, phys_addr_t size)
 231 {
 232         __memblock_free_early(base, size);
 233 }
 234
 235 static inline void __init memblock_free_early_nid(
 236                                 phys_addr_t base, phys_addr_t size, int nid)
 237 {
 238         __memblock_free_early(base, size);
 239 }
 240
 241 static inline void __init memblock_free_late(
 242                                         phys_addr_t base, phys_addr_t size)
 243 {
 244         __memblock_free_late(base, size);
 245 }
 246
 247 #else
 248
 249 #define BOOTMEM_ALLOC_ACCESSIBLE        0
 250
 251
 252 /* Fall back to all the existing bootmem APIs */
 253 static inline void * __init memblock_virt_alloc(
 254                                         phys_addr_t size,  phys_addr_t align)
 255 {
 256         if (!align)
 257                 align = SMP_CACHE_BYTES;
 258         return __alloc_bootmem(size, align, BOOTMEM_LOW_LIMIT);
 259 }
 260
 261 static inline void * __init memblock_virt_alloc_nopanic(
 262                                         phys_addr_t size, phys_addr_t align)
 263 {
 264         if (!align)
 265                 align = SMP_CACHE_BYTES;
 266         return __alloc_bootmem_nopanic(size, align, BOOTMEM_LOW_LIMIT);
 267 }
 268
 269 static inline void * __init memblock_virt_alloc_low(
 270                                         phys_addr_t size, phys_addr_t align)
 271 {
 272         if (!align)
 273                 align = SMP_CACHE_BYTES;
 274         return __alloc_bootmem_low(size, align, 0);
 275 }
 276
 277 static inline void * __init memblock_virt_alloc_low_nopanic(
 278                                         phys_addr_t size, phys_addr_t align)
 279 {
 280         if (!align)
 281                 align = SMP_CACHE_BYTES;
 282         return __alloc_bootmem_low_nopanic(size, align, 0);
 283 }
 284
 285 static inline void * __init memblock_virt_alloc_from_nopanic(
 286                 phys_addr_t size, phys_addr_t align, phys_addr_t min_addr)
 287 {
 288         return __alloc_bootmem_nopanic(size, align, min_addr);
 289 }
 290
 291 static inline void * __init memblock_virt_alloc_node(
 292                                                 phys_addr_t size, int nid)
 293 {
 294         return __alloc_bootmem_node(NODE_DATA(nid), size, SMP_CACHE_BYTES,
 295                                      BOOTMEM_LOW_LIMIT);
 296 }
 297
 298 static inline void * __init memblock_virt_alloc_node_nopanic(
 299                                                 phys_addr_t size, int nid)
 300 {
 301         return __alloc_bootmem_node_nopanic(NODE_DATA(nid), size,
 302                                              SMP_CACHE_BYTES,
 303                                              BOOTMEM_LOW_LIMIT);
 304 }
 305
 306 static inline void * __init memblock_virt_alloc_try_nid(phys_addr_t size,
 307         phys_addr_t align, phys_addr_t min_addr, phys_addr_t max_addr, int nid)
 308 {
 309         return __alloc_bootmem_node_high(NODE_DATA(nid), size, align,
 310                                           min_addr);
 311 }
 312
 313 static inline void * __init memblock_virt_alloc_try_nid_nopanic(
 314                         phys_addr_t size, phys_addr_t align,
 315                         phys_addr_t min_addr, phys_addr_t max_addr, int nid)
 316 {
 317         return ___alloc_bootmem_node_nopanic(NODE_DATA(nid), size, align,
 318                                 min_addr, max_addr);
 319 }
 320
 321 static inline void __init memblock_free_early(
 322                                         phys_addr_t base, phys_addr_t size)
 323 {
 324         free_bootmem(base, size);
 325 }
 326
 327 static inline void __init memblock_free_early_nid(
 328                                 phys_addr_t base, phys_addr_t size, int nid)
 329 {
 330         free_bootmem_node(NODE_DATA(nid), base, size);
 331 }
 332
 333 static inline void __init memblock_free_late(
 334                                         phys_addr_t base, phys_addr_t size)
 335 {
 336         free_bootmem_late(base, size);
 337 }
 338 #endif /* defined(CONFIG_HAVE_MEMBLOCK) && defined(CONFIG_NO_BOOTMEM) */
 339
 340 #ifdef CONFIG_HAVE_ARCH_ALLOC_REMAP
 341 extern void *alloc_remap(int nid, unsigned long size);
 342 #else
 343 static inline void *alloc_remap(int nid, unsigned long size)
 344 {
 345         return NULL;
 346 }
 347 #endif /* CONFIG_HAVE_ARCH_ALLOC_REMAP */
 348
 349 extern void *alloc_large_system_hash(const char *tablename,
 350                                      unsigned long bucketsize,
 351                                      unsigned long numentries,
 352                                      int scale,
 353                                      int flags,
 354                                      unsigned int *_hash_shift,
 355                                      unsigned int *_hash_mask,
 356                                      unsigned long low_limit,
 357                                      unsigned long high_limit);
 358
 359 #define HASH_EARLY      0x00000001      /* Allocating during early boot? */
 360 #define HASH_SMALL      0x00000002      /* sub-page allocation allowed, min
 361                                          * shift passed via *_hash_shift */
 362 #define HASH_ZERO       0x00000004      /* Zero allocated hash table */
 363
 364 /* Only NUMA needs hash distribution. 64bit NUMA architectures have
 365  * sufficient vmalloc space.
 366  */
 367 #ifdef CONFIG_NUMA
 368 #define HASHDIST_DEFAULT IS_ENABLED(CONFIG_64BIT)
 369 extern int hashdist;            /* Distribute hashes across NUMA nodes? */
 370 #else
 371 #define hashdist (0)
 372 #endif
 373
 374
 375 #endif /* _LINUX_BOOTMEM_H */