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