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(void);
  53extern void reset_node_managed_pages(pg_data_t *pgdat);
  54extern void reset_all_zones_managed_pages(void);
  55
  56extern void free_bootmem_node(pg_data_t *pgdat,
  57                              unsigned long addr,
  58                              unsigned long size);
  59extern void free_bootmem(unsigned long physaddr, unsigned long size);
  60extern 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
  73extern int reserve_bootmem(unsigned long addr,
  74                           unsigned long size,
  75                           int flags);
  76extern int reserve_bootmem_node(pg_data_t *pgdat,
  77                                unsigned long physaddr,
  78                                unsigned long size,
  79                                int flags);
  80
  81extern void *__alloc_bootmem(unsigned long size,
  82                             unsigned long align,
  83                             unsigned long goal);
  84extern void *__alloc_bootmem_nopanic(unsigned long size,
  85                                     unsigned long align,
  86                                     unsigned long goal);
  87extern void *__alloc_bootmem_node(pg_data_t *pgdat,
  88                                  unsigned long size,
  89                                  unsigned long align,
  90                                  unsigned long goal);
  91void *__alloc_bootmem_node_high(pg_data_t *pgdat,
  92                                  unsigned long size,
  93                                  unsigned long align,
  94                                  unsigned long goal);
  95extern void *__alloc_bootmem_node_nopanic(pg_data_t *pgdat,
  96                                  unsigned long size,
  97                                  unsigned long align,
  98                                  unsigned long goal);
  99void *___alloc_bootmem_node_nopanic(pg_data_t *pgdat,
 100                                  unsigned long size,
 101                                  unsigned long align,
 102                                  unsigned long goal,
 103                                  unsigned long limit);
 104extern void *__alloc_bootmem_low(unsigned long size,
 105                                 unsigned long align,
 106                                 unsigned long goal);
 107void *__alloc_bootmem_low_nopanic(unsigned long size,
 108                                 unsigned long align,
 109                                 unsigned long goal);
 110extern 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 */
 158void *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);
 161void *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);
 163void __memblock_free_early(phys_addr_t base, phys_addr_t size);
 164void __memblock_free_late(phys_addr_t base, phys_addr_t size);
 165
 166static 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
 174static 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
 187static 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}
 195static 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
 204static 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
 212static 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
 219static 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
 227static inline void __init memblock_free_early(
 228                                        phys_addr_t base, phys_addr_t size)
 229{
 230        __memblock_free_early(base, size);
 231}
 232
 233static 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
 239static 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 */
 251static 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
 259static 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
 267static 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
 275static 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
 283static 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
 289static 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
 296static 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
 304static 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
 311static 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
 319static inline void __init memblock_free_early(
 320                                        phys_addr_t base, phys_addr_t size)
 321{
 322        free_bootmem(base, size);
 323}
 324
 325static 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
 331static 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
 339extern void *alloc_remap(int nid, unsigned long size);
 340#else
 341static inline void *alloc_remap(int nid, unsigned long size)
 342{
 343        return NULL;
 344}
 345#endif /* CONFIG_HAVE_ARCH_ALLOC_REMAP */
 346
 347extern 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)
 366extern int hashdist;            /* Distribute hashes across NUMA nodes? */
 367#else
 368#define hashdist (0)
 369#endif
 370
 371
 372#endif /* _LINUX_BOOTMEM_H */
 373