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
  11/*
  12 *  simple boot-time physical memory area allocator.
  13 */
  14
  15extern unsigned long max_low_pfn;
  16extern unsigned long min_low_pfn;
  17
  18/*
  19 * highest page
  20 */
  21extern unsigned long max_pfn;
  22/*
  23 * highest possible page
  24 */
  25extern 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 */
  32typedef 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
  41extern bootmem_data_t bootmem_node_data[];
  42#endif
  43
  44extern unsigned long bootmem_bootmap_pages(unsigned long);
  45
  46extern unsigned long init_bootmem_node(pg_data_t *pgdat,
  47                                       unsigned long freepfn,
  48                                       unsigned long startpfn,
  49                                       unsigned long endpfn);
  50extern unsigned long init_bootmem(unsigned long addr, unsigned long memend);
  51
  52extern unsigned long free_all_bootmem_node(pg_data_t *pgdat);
  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 0, then the return value is always 0 (success). If
  68 * flags contains BOOTMEM_EXCLUSIVE, then -EBUSY is returned if the
  69 * memory 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);
  88extern void *__alloc_bootmem_node(pg_data_t *pgdat,
  89                                  unsigned long size,
  90                                  unsigned long align,
  91                                  unsigned long goal);
  92void *__alloc_bootmem_node_high(pg_data_t *pgdat,
  93                                  unsigned long size,
  94                                  unsigned long align,
  95                                  unsigned long goal);
  96extern void *__alloc_bootmem_node_nopanic(pg_data_t *pgdat,
  97                                  unsigned long size,
  98                                  unsigned long align,
  99                                  unsigned long goal);
 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);
 105extern void *__alloc_bootmem_low(unsigned long size,
 106                                 unsigned long align,
 107                                 unsigned long goal);
 108void *__alloc_bootmem_low_nopanic(unsigned long size,
 109                                 unsigned long align,
 110                                 unsigned long goal);
 111extern void *__alloc_bootmem_low_node(pg_data_t *pgdat,
 112                                      unsigned long size,
 113                                      unsigned long align,
 114                                      unsigned long goal);
 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#define alloc_bootmem(x) \
 124        __alloc_bootmem(x, SMP_CACHE_BYTES, BOOTMEM_LOW_LIMIT)
 125#define alloc_bootmem_align(x, align) \
 126        __alloc_bootmem(x, align, BOOTMEM_LOW_LIMIT)
 127#define alloc_bootmem_nopanic(x) \
 128        __alloc_bootmem_nopanic(x, SMP_CACHE_BYTES, BOOTMEM_LOW_LIMIT)
 129#define alloc_bootmem_pages(x) \
 130        __alloc_bootmem(x, PAGE_SIZE, BOOTMEM_LOW_LIMIT)
 131#define alloc_bootmem_pages_nopanic(x) \
 132        __alloc_bootmem_nopanic(x, PAGE_SIZE, BOOTMEM_LOW_LIMIT)
 133#define alloc_bootmem_node(pgdat, x) \
 134        __alloc_bootmem_node(pgdat, x, SMP_CACHE_BYTES, BOOTMEM_LOW_LIMIT)
 135#define alloc_bootmem_node_nopanic(pgdat, x) \
 136        __alloc_bootmem_node_nopanic(pgdat, x, SMP_CACHE_BYTES, BOOTMEM_LOW_LIMIT)
 137#define alloc_bootmem_pages_node(pgdat, x) \
 138        __alloc_bootmem_node(pgdat, x, PAGE_SIZE, BOOTMEM_LOW_LIMIT)
 139#define alloc_bootmem_pages_node_nopanic(pgdat, x) \
 140        __alloc_bootmem_node_nopanic(pgdat, x, PAGE_SIZE, BOOTMEM_LOW_LIMIT)
 141
 142#define alloc_bootmem_low(x) \
 143        __alloc_bootmem_low(x, SMP_CACHE_BYTES, 0)
 144#define alloc_bootmem_low_pages_nopanic(x) \
 145        __alloc_bootmem_low_nopanic(x, PAGE_SIZE, 0)
 146#define alloc_bootmem_low_pages(x) \
 147        __alloc_bootmem_low(x, PAGE_SIZE, 0)
 148#define alloc_bootmem_low_pages_node(pgdat, x) \
 149        __alloc_bootmem_low_node(pgdat, x, PAGE_SIZE, 0)
 150
 151
 152#if defined(CONFIG_HAVE_MEMBLOCK) && defined(CONFIG_NO_BOOTMEM)
 153
 154/* FIXME: use MEMBLOCK_ALLOC_* variants here */
 155#define BOOTMEM_ALLOC_ACCESSIBLE        0
 156#define BOOTMEM_ALLOC_ANYWHERE          (~(phys_addr_t)0)
 157
 158/* FIXME: Move to memblock.h at a point where we remove nobootmem.c */
 159void *memblock_virt_alloc_try_nid_nopanic(phys_addr_t size,
 160                phys_addr_t align, phys_addr_t min_addr,
 161                phys_addr_t max_addr, int nid);
 162void *memblock_virt_alloc_try_nid(phys_addr_t size, phys_addr_t align,
 163                phys_addr_t min_addr, phys_addr_t max_addr, int nid);
 164void __memblock_free_early(phys_addr_t base, phys_addr_t size);
 165void __memblock_free_late(phys_addr_t base, phys_addr_t size);
 166
 167static inline void * __init memblock_virt_alloc(
 168                                        phys_addr_t size,  phys_addr_t align)
 169{
 170        return memblock_virt_alloc_try_nid(size, align, BOOTMEM_LOW_LIMIT,
 171                                            BOOTMEM_ALLOC_ACCESSIBLE,
 172                                            NUMA_NO_NODE);
 173}
 174
 175static inline void * __init memblock_virt_alloc_nopanic(
 176                                        phys_addr_t size, phys_addr_t align)
 177{
 178        return memblock_virt_alloc_try_nid_nopanic(size, align,
 179                                                    BOOTMEM_LOW_LIMIT,
 180                                                    BOOTMEM_ALLOC_ACCESSIBLE,
 181                                                    NUMA_NO_NODE);
 182}
 183
 184static inline void * __init memblock_virt_alloc_from_nopanic(
 185                phys_addr_t size, phys_addr_t align, phys_addr_t min_addr)
 186{
 187        return memblock_virt_alloc_try_nid_nopanic(size, align, min_addr,
 188                                                    BOOTMEM_ALLOC_ACCESSIBLE,
 189                                                    NUMA_NO_NODE);
 190}
 191
 192static inline void * __init memblock_virt_alloc_node(
 193                                                phys_addr_t size, int nid)
 194{
 195        return memblock_virt_alloc_try_nid(size, 0, BOOTMEM_LOW_LIMIT,
 196                                            BOOTMEM_ALLOC_ACCESSIBLE, nid);
 197}
 198
 199static inline void * __init memblock_virt_alloc_node_nopanic(
 200                                                phys_addr_t size, int nid)
 201{
 202        return memblock_virt_alloc_try_nid_nopanic(size, 0, BOOTMEM_LOW_LIMIT,
 203                                                    BOOTMEM_ALLOC_ACCESSIBLE,
 204                                                    nid);
 205}
 206
 207static inline void __init memblock_free_early(
 208                                        phys_addr_t base, phys_addr_t size)
 209{
 210        __memblock_free_early(base, size);
 211}
 212
 213static inline void __init memblock_free_early_nid(
 214                                phys_addr_t base, phys_addr_t size, int nid)
 215{
 216        __memblock_free_early(base, size);
 217}
 218
 219static inline void __init memblock_free_late(
 220                                        phys_addr_t base, phys_addr_t size)
 221{
 222        __memblock_free_late(base, size);
 223}
 224
 225#else
 226
 227#define BOOTMEM_ALLOC_ACCESSIBLE        0
 228
 229
 230/* Fall back to all the existing bootmem APIs */
 231static inline void * __init memblock_virt_alloc(
 232                                        phys_addr_t size,  phys_addr_t align)
 233{
 234        if (!align)
 235                align = SMP_CACHE_BYTES;
 236        return __alloc_bootmem(size, align, BOOTMEM_LOW_LIMIT);
 237}
 238
 239static inline void * __init memblock_virt_alloc_nopanic(
 240                                        phys_addr_t size, phys_addr_t align)
 241{
 242        if (!align)
 243                align = SMP_CACHE_BYTES;
 244        return __alloc_bootmem_nopanic(size, align, BOOTMEM_LOW_LIMIT);
 245}
 246
 247static inline void * __init memblock_virt_alloc_from_nopanic(
 248                phys_addr_t size, phys_addr_t align, phys_addr_t min_addr)
 249{
 250        return __alloc_bootmem_nopanic(size, align, min_addr);
 251}
 252
 253static inline void * __init memblock_virt_alloc_node(
 254                                                phys_addr_t size, int nid)
 255{
 256        return __alloc_bootmem_node(NODE_DATA(nid), size, SMP_CACHE_BYTES,
 257                                     BOOTMEM_LOW_LIMIT);
 258}
 259
 260static inline void * __init memblock_virt_alloc_node_nopanic(
 261                                                phys_addr_t size, int nid)
 262{
 263        return __alloc_bootmem_node_nopanic(NODE_DATA(nid), size,
 264                                             SMP_CACHE_BYTES,
 265                                             BOOTMEM_LOW_LIMIT);
 266}
 267
 268static inline void * __init memblock_virt_alloc_try_nid(phys_addr_t size,
 269        phys_addr_t align, phys_addr_t min_addr, phys_addr_t max_addr, int nid)
 270{
 271        return __alloc_bootmem_node_high(NODE_DATA(nid), size, align,
 272                                          min_addr);
 273}
 274
 275static inline void * __init memblock_virt_alloc_try_nid_nopanic(
 276                        phys_addr_t size, phys_addr_t align,
 277                        phys_addr_t min_addr, phys_addr_t max_addr, int nid)
 278{
 279        return ___alloc_bootmem_node_nopanic(NODE_DATA(nid), size, align,
 280                                min_addr, max_addr);
 281}
 282
 283static inline void __init memblock_free_early(
 284                                        phys_addr_t base, phys_addr_t size)
 285{
 286        free_bootmem(base, size);
 287}
 288
 289static inline void __init memblock_free_early_nid(
 290                                phys_addr_t base, phys_addr_t size, int nid)
 291{
 292        free_bootmem_node(NODE_DATA(nid), base, size);
 293}
 294
 295static inline void __init memblock_free_late(
 296                                        phys_addr_t base, phys_addr_t size)
 297{
 298        free_bootmem_late(base, size);
 299}
 300#endif /* defined(CONFIG_HAVE_MEMBLOCK) && defined(CONFIG_NO_BOOTMEM) */
 301
 302#ifdef CONFIG_HAVE_ARCH_ALLOC_REMAP
 303extern void *alloc_remap(int nid, unsigned long size);
 304#else
 305static inline void *alloc_remap(int nid, unsigned long size)
 306{
 307        return NULL;
 308}
 309#endif /* CONFIG_HAVE_ARCH_ALLOC_REMAP */
 310
 311extern void *alloc_large_system_hash(const char *tablename,
 312                                     unsigned long bucketsize,
 313                                     unsigned long numentries,
 314                                     int scale,
 315                                     int flags,
 316                                     unsigned int *_hash_shift,
 317                                     unsigned int *_hash_mask,
 318                                     unsigned long low_limit,
 319                                     unsigned long high_limit);
 320
 321#define HASH_EARLY      0x00000001      /* Allocating during early boot? */
 322#define HASH_SMALL      0x00000002      /* sub-page allocation allowed, min
 323                                         * shift passed via *_hash_shift */
 324
 325/* Only NUMA needs hash distribution. 64bit NUMA architectures have
 326 * sufficient vmalloc space.
 327 */
 328#if defined(CONFIG_NUMA) && defined(CONFIG_64BIT)
 329#define HASHDIST_DEFAULT 1
 330#else
 331#define HASHDIST_DEFAULT 0
 332#endif
 333extern int hashdist;            /* Distribute hashes across NUMA nodes? */
 334
 335
 336#endif /* _LINUX_BOOTMEM_H */
 337