include/linux/bootmem.h

   1 /* SPDX-License-Identifier: GPL-2.0 */
   2 /*
   3  * Discontiguous memory support, Kanoj Sarcar, SGI, Nov 1999
   4  */
   5 #ifndef _LINUX_BOOTMEM_H
   6 #define _LINUX_BOOTMEM_H
   7
   8 #include <linux/mmzone.h>
   9 #include <linux/mm_types.h>
  10 #include <asm/dma.h>
  11 #include <asm/processor.h>
  12
  13 /*
  14  *  simple boot-time physical memory area allocator.
  15  */
  16
  17 extern unsigned long max_low_pfn;
  18 extern unsigned long min_low_pfn;
  19
  20 /*
  21  * highest page
  22  */
  23 extern unsigned long max_pfn;
  24 /*
  25  * highest possible page
  26  */
  27 extern unsigned long long max_possible_pfn;
  28
  29 extern unsigned long free_all_bootmem(void);
  30 extern void reset_node_managed_pages(pg_data_t *pgdat);
  31 extern void reset_all_zones_managed_pages(void);
  32
  33 extern void free_bootmem_node(pg_data_t *pgdat,
  34                               unsigned long addr,
  35                               unsigned long size);
  36 extern void free_bootmem(unsigned long physaddr, unsigned long size);
  37 extern void free_bootmem_late(unsigned long physaddr, unsigned long size);
  38
  39 /*
  40  * Flags for reserve_bootmem (also if CONFIG_HAVE_ARCH_BOOTMEM_NODE,
  41  * the architecture-specific code should honor this).
  42  *
  43  * If flags is BOOTMEM_DEFAULT, then the return value is always 0 (success).
  44  * If flags contains BOOTMEM_EXCLUSIVE, then -EBUSY is returned if the memory
  45  * already was reserved.
  46  */
  47 #define BOOTMEM_DEFAULT         0
  48 #define BOOTMEM_EXCLUSIVE       (1<<0)
  49
  50 extern void *__alloc_bootmem(unsigned long size,
  51                              unsigned long align,
  52                              unsigned long goal);
  53 extern void *__alloc_bootmem_nopanic(unsigned long size,
  54                                      unsigned long align,
  55                                      unsigned long goal) __malloc;
  56 extern void *__alloc_bootmem_node(pg_data_t *pgdat,
  57                                   unsigned long size,
  58                                   unsigned long align,
  59                                   unsigned long goal) __malloc;
  60 void *__alloc_bootmem_node_high(pg_data_t *pgdat,
  61                                   unsigned long size,
  62                                   unsigned long align,
  63                                   unsigned long goal) __malloc;
  64 extern void *__alloc_bootmem_node_nopanic(pg_data_t *pgdat,
  65                                   unsigned long size,
  66                                   unsigned long align,
  67                                   unsigned long goal) __malloc;
  68 void *___alloc_bootmem_node_nopanic(pg_data_t *pgdat,
  69                                   unsigned long size,
  70                                   unsigned long align,
  71                                   unsigned long goal,
  72                                   unsigned long limit) __malloc;
  73 extern void *__alloc_bootmem_low(unsigned long size,
  74                                  unsigned long align,
  75                                  unsigned long goal) __malloc;
  76 void *__alloc_bootmem_low_nopanic(unsigned long size,
  77                                  unsigned long align,
  78                                  unsigned long goal) __malloc;
  79 extern void *__alloc_bootmem_low_node(pg_data_t *pgdat,
  80                                       unsigned long size,
  81                                       unsigned long align,
  82                                       unsigned long goal) __malloc;
  83
  84 /* We are using top down, so it is safe to use 0 here */
  85 #define BOOTMEM_LOW_LIMIT 0
  86
  87 #ifndef ARCH_LOW_ADDRESS_LIMIT
  88 #define ARCH_LOW_ADDRESS_LIMIT  0xffffffffUL
  89 #endif
  90
  91 #define alloc_bootmem(x) \
  92         __alloc_bootmem(x, SMP_CACHE_BYTES, BOOTMEM_LOW_LIMIT)
  93 #define alloc_bootmem_align(x, align) \
  94         __alloc_bootmem(x, align, BOOTMEM_LOW_LIMIT)
  95 #define alloc_bootmem_nopanic(x) \
  96         __alloc_bootmem_nopanic(x, SMP_CACHE_BYTES, BOOTMEM_LOW_LIMIT)
  97 #define alloc_bootmem_pages(x) \
  98         __alloc_bootmem(x, PAGE_SIZE, BOOTMEM_LOW_LIMIT)
  99 #define alloc_bootmem_pages_nopanic(x) \
 100         __alloc_bootmem_nopanic(x, PAGE_SIZE, BOOTMEM_LOW_LIMIT)
 101 #define alloc_bootmem_node(pgdat, x) \
 102         __alloc_bootmem_node(pgdat, x, SMP_CACHE_BYTES, BOOTMEM_LOW_LIMIT)
 103 #define alloc_bootmem_node_nopanic(pgdat, x) \
 104         __alloc_bootmem_node_nopanic(pgdat, x, SMP_CACHE_BYTES, BOOTMEM_LOW_LIMIT)
 105 #define alloc_bootmem_pages_node(pgdat, x) \
 106         __alloc_bootmem_node(pgdat, x, PAGE_SIZE, BOOTMEM_LOW_LIMIT)
 107 #define alloc_bootmem_pages_node_nopanic(pgdat, x) \
 108         __alloc_bootmem_node_nopanic(pgdat, x, PAGE_SIZE, BOOTMEM_LOW_LIMIT)
 109
 110 #define alloc_bootmem_low(x) \
 111         __alloc_bootmem_low(x, SMP_CACHE_BYTES, 0)
 112 #define alloc_bootmem_low_pages_nopanic(x) \
 113         __alloc_bootmem_low_nopanic(x, PAGE_SIZE, 0)
 114 #define alloc_bootmem_low_pages(x) \
 115         __alloc_bootmem_low(x, PAGE_SIZE, 0)
 116 #define alloc_bootmem_low_pages_node(pgdat, x) \
 117         __alloc_bootmem_low_node(pgdat, x, PAGE_SIZE, 0)
 118
 119 /* FIXME: use MEMBLOCK_ALLOC_* variants here */
 120 #define BOOTMEM_ALLOC_ACCESSIBLE        0
 121 #define BOOTMEM_ALLOC_ANYWHERE          (~(phys_addr_t)0)
 122
 123 /* FIXME: Move to memblock.h at a point where we remove nobootmem.c */
 124 void *memblock_virt_alloc_try_nid_raw(phys_addr_t size, phys_addr_t align,
 125                                       phys_addr_t min_addr,
 126                                       phys_addr_t max_addr, int nid);
 127 void *memblock_virt_alloc_try_nid_nopanic(phys_addr_t size,
 128                 phys_addr_t align, phys_addr_t min_addr,
 129                 phys_addr_t max_addr, int nid);
 130 void *memblock_virt_alloc_try_nid(phys_addr_t size, phys_addr_t align,
 131                 phys_addr_t min_addr, phys_addr_t max_addr, int nid);
 132 void __memblock_free_early(phys_addr_t base, phys_addr_t size);
 133 void __memblock_free_late(phys_addr_t base, phys_addr_t size);
 134
 135 static inline void * __init memblock_virt_alloc(
 136                                         phys_addr_t size,  phys_addr_t align)
 137 {
 138         return memblock_virt_alloc_try_nid(size, align, BOOTMEM_LOW_LIMIT,
 139                                             BOOTMEM_ALLOC_ACCESSIBLE,
 140                                             NUMA_NO_NODE);
 141 }
 142
 143 static inline void * __init memblock_virt_alloc_raw(
 144                                         phys_addr_t size,  phys_addr_t align)
 145 {
 146         return memblock_virt_alloc_try_nid_raw(size, align, BOOTMEM_LOW_LIMIT,
 147                                             BOOTMEM_ALLOC_ACCESSIBLE,
 148                                             NUMA_NO_NODE);
 149 }
 150
 151 static inline void * __init memblock_virt_alloc_nopanic(
 152                                         phys_addr_t size, phys_addr_t align)
 153 {
 154         return memblock_virt_alloc_try_nid_nopanic(size, align,
 155                                                     BOOTMEM_LOW_LIMIT,
 156                                                     BOOTMEM_ALLOC_ACCESSIBLE,
 157                                                     NUMA_NO_NODE);
 158 }
 159
 160 static inline void * __init memblock_virt_alloc_low(
 161                                         phys_addr_t size, phys_addr_t align)
 162 {
 163         return memblock_virt_alloc_try_nid(size, align,
 164                                                    BOOTMEM_LOW_LIMIT,
 165                                                    ARCH_LOW_ADDRESS_LIMIT,
 166                                                    NUMA_NO_NODE);
 167 }
 168 static inline void * __init memblock_virt_alloc_low_nopanic(
 169                                         phys_addr_t size, phys_addr_t align)
 170 {
 171         return memblock_virt_alloc_try_nid_nopanic(size, align,
 172                                                    BOOTMEM_LOW_LIMIT,
 173                                                    ARCH_LOW_ADDRESS_LIMIT,
 174                                                    NUMA_NO_NODE);
 175 }
 176
 177 static inline void * __init memblock_virt_alloc_from_nopanic(
 178                 phys_addr_t size, phys_addr_t align, phys_addr_t min_addr)
 179 {
 180         return memblock_virt_alloc_try_nid_nopanic(size, align, min_addr,
 181                                                     BOOTMEM_ALLOC_ACCESSIBLE,
 182                                                     NUMA_NO_NODE);
 183 }
 184
 185 static inline void * __init memblock_virt_alloc_node(
 186                                                 phys_addr_t size, int nid)
 187 {
 188         return memblock_virt_alloc_try_nid(size, 0, BOOTMEM_LOW_LIMIT,
 189                                             BOOTMEM_ALLOC_ACCESSIBLE, nid);
 190 }
 191
 192 static inline void * __init memblock_virt_alloc_node_nopanic(
 193                                                 phys_addr_t size, int nid)
 194 {
 195         return memblock_virt_alloc_try_nid_nopanic(size, 0, BOOTMEM_LOW_LIMIT,
 196                                                     BOOTMEM_ALLOC_ACCESSIBLE,
 197                                                     nid);
 198 }
 199
 200 static inline void __init memblock_free_early(
 201                                         phys_addr_t base, phys_addr_t size)
 202 {
 203         __memblock_free_early(base, size);
 204 }
 205
 206 static inline void __init memblock_free_early_nid(
 207                                 phys_addr_t base, phys_addr_t size, int nid)
 208 {
 209         __memblock_free_early(base, size);
 210 }
 211
 212 static inline void __init memblock_free_late(
 213                                         phys_addr_t base, phys_addr_t size)
 214 {
 215         __memblock_free_late(base, size);
 216 }
 217
 218 extern void *alloc_large_system_hash(const char *tablename,
 219                                      unsigned long bucketsize,
 220                                      unsigned long numentries,
 221                                      int scale,
 222                                      int flags,
 223                                      unsigned int *_hash_shift,
 224                                      unsigned int *_hash_mask,
 225                                      unsigned long low_limit,
 226                                      unsigned long high_limit);
 227
 228 #define HASH_EARLY      0x00000001      /* Allocating during early boot? */
 229 #define HASH_SMALL      0x00000002      /* sub-page allocation allowed, min
 230                                          * shift passed via *_hash_shift */
 231 #define HASH_ZERO       0x00000004      /* Zero allocated hash table */
 232
 233 /* Only NUMA needs hash distribution. 64bit NUMA architectures have
 234  * sufficient vmalloc space.
 235  */
 236 #ifdef CONFIG_NUMA
 237 #define HASHDIST_DEFAULT IS_ENABLED(CONFIG_64BIT)
 238 extern int hashdist;            /* Distribute hashes across NUMA nodes? */
 239 #else
 240 #define hashdist (0)
 241 #endif
 242
 243
 244 #endif /* _LINUX_BOOTMEM_H */