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