include/linux/bootmem.h

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