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