LXR linux/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
  16extern unsigned long max_low_pfn;
  17extern unsigned long min_low_pfn;
  18
  19/*
  20 * highest page
  21 */
  22extern unsigned long max_pfn;
  23/*
  24 * highest possible page
  25 */
  26extern 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 */
  33typedef 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
  42extern bootmem_data_t bootmem_node_data[];
  43#endif
  44
  45extern unsigned long bootmem_bootmap_pages(unsigned long);
  46
  47extern unsigned long init_bootmem_node(pg_data_t *pgdat,
  48                                       unsigned long freepfn,
  49                                       unsigned long startpfn,
  50                                       unsigned long endpfn);
  51extern unsigned long init_bootmem(unsigned long addr, unsigned long memend);
  52
  53extern unsigned long free_all_bootmem(void);
  54extern void reset_node_managed_pages(pg_data_t *pgdat);
  55extern void reset_all_zones_managed_pages(void);
  56
  57extern void free_bootmem_node(pg_data_t *pgdat,
  58                              unsigned long addr,
  59                              unsigned long size);
  60extern void free_bootmem(unsigned long physaddr, unsigned long size);
  61extern 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
  74extern int reserve_bootmem(unsigned long addr,
  75                           unsigned long size,
  76                           int flags);
  77extern int reserve_bootmem_node(pg_data_t *pgdat,
  78                                unsigned long physaddr,
  79                                unsigned long size,
  80                                int flags);
  81
  82extern void *__alloc_bootmem(unsigned long size,
  83                             unsigned long align,
  84                             unsigned long goal);
  85extern void *__alloc_bootmem_nopanic(unsigned long size,
  86                                     unsigned long align,
  87                                     unsigned long goal) __malloc;
  88extern void *__alloc_bootmem_node(pg_data_t *pgdat,
  89                                  unsigned long size,
  90                                  unsigned long align,
  91                                  unsigned long goal) __malloc;
  92void *__alloc_bootmem_node_high(pg_data_t *pgdat,
  93                                  unsigned long size,
  94                                  unsigned long align,
  95                                  unsigned long goal) __malloc;
  96extern void *__alloc_bootmem_node_nopanic(pg_data_t *pgdat,
  97                                  unsigned long size,
  98                                  unsigned long align,
  99                                  unsigned long goal) __malloc;
 100void *___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;
 105extern void *__alloc_bootmem_low(unsigned long size,
 106                                 unsigned long align,
 107                                 unsigned long goal) __malloc;
 108void *__alloc_bootmem_low_nopanic(unsigned long size,
 109                                 unsigned long align,
 110                                 unsigned long goal) __malloc;
 111extern 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 */
 163void *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);
 166void *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);
 168void __memblock_free_early(phys_addr_t base, phys_addr_t size);
 169void __memblock_free_late(phys_addr_t base, phys_addr_t size);
 170
 171static 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
 179static 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
 188static 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}
 196static 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
 205static 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
 213static 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
 220static 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
 228static inline void __init memblock_free_early(
 229                                        phys_addr_t base, phys_addr_t size)
 230{
 231        __memblock_free_early(base, size);
 232}
 233
 234static 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
 240static 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 */
 252static 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
 260static 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
 268static 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
 276static 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
 284static 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
 290static 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
 297static 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
 305static 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
 312static 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
 320static inline void __init memblock_free_early(
 321                                        phys_addr_t base, phys_addr_t size)
 322{
 323        free_bootmem(base, size);
 324}
 325
 326static 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
 332static 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
 340extern void *alloc_remap(int nid, unsigned long size);
 341#else
 342static inline void *alloc_remap(int nid, unsigned long size)
 343{
 344        return NULL;
 345}
 346#endif /* CONFIG_HAVE_ARCH_ALLOC_REMAP */
 347
 348extern 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
 362/* Only NUMA needs hash distribution. 64bit NUMA architectures have
 363 * sufficient vmalloc space.
 364 */
 365#ifdef CONFIG_NUMA
 366#define HASHDIST_DEFAULT IS_ENABLED(CONFIG_64BIT)
 367extern int hashdist;            /* Distribute hashes across NUMA nodes? */
 368#else
 369#define hashdist (0)
 370#endif
 371
 372
 373#endif /* _LINUX_BOOTMEM_H */
 374