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 bootmem_bootmap_pages(unsigned long);
  30
  31 extern unsigned long init_bootmem_node(pg_data_t *pgdat,
  32                                        unsigned long freepfn,
  33                                        unsigned long startpfn,
  34                                        unsigned long endpfn);
  35 extern unsigned long init_bootmem(unsigned long addr, unsigned long memend);
  36
  37 extern unsigned long free_all_bootmem(void);
  38 extern void reset_node_managed_pages(pg_data_t *pgdat);
  39 extern void reset_all_zones_managed_pages(void);
  40
  41 extern void free_bootmem_node(pg_data_t *pgdat,
  42                               unsigned long addr,
  43                               unsigned long size);
  44 extern void free_bootmem(unsigned long physaddr, unsigned long size);
  45 extern void free_bootmem_late(unsigned long physaddr, unsigned long size);
  46
  47 /*
  48  * Flags for reserve_bootmem (also if CONFIG_HAVE_ARCH_BOOTMEM_NODE,
  49  * the architecture-specific code should honor this).
  50  *
  51  * If flags is BOOTMEM_DEFAULT, then the return value is always 0 (success).
  52  * If flags contains BOOTMEM_EXCLUSIVE, then -EBUSY is returned if the memory
  53  * already was reserved.
  54  */
  55 #define BOOTMEM_DEFAULT         0
  56 #define BOOTMEM_EXCLUSIVE       (1<<0)
  57
  58 extern int reserve_bootmem(unsigned long addr,
  59                            unsigned long size,
  60                            int flags);
  61 extern int reserve_bootmem_node(pg_data_t *pgdat,
  62                                 unsigned long physaddr,
  63                                 unsigned long size,
  64                                 int flags);
  65
  66 extern void *__alloc_bootmem(unsigned long size,
  67                              unsigned long align,
  68                              unsigned long goal);
  69 extern void *__alloc_bootmem_nopanic(unsigned long size,
  70                                      unsigned long align,
  71                                      unsigned long goal) __malloc;
  72 extern void *__alloc_bootmem_node(pg_data_t *pgdat,
  73                                   unsigned long size,
  74                                   unsigned long align,
  75                                   unsigned long goal) __malloc;
  76 void *__alloc_bootmem_node_high(pg_data_t *pgdat,
  77                                   unsigned long size,
  78                                   unsigned long align,
  79                                   unsigned long goal) __malloc;
  80 extern void *__alloc_bootmem_node_nopanic(pg_data_t *pgdat,
  81                                   unsigned long size,
  82                                   unsigned long align,
  83                                   unsigned long goal) __malloc;
  84 void *___alloc_bootmem_node_nopanic(pg_data_t *pgdat,
  85                                   unsigned long size,
  86                                   unsigned long align,
  87                                   unsigned long goal,
  88                                   unsigned long limit) __malloc;
  89 extern void *__alloc_bootmem_low(unsigned long size,
  90                                  unsigned long align,
  91                                  unsigned long goal) __malloc;
  92 void *__alloc_bootmem_low_nopanic(unsigned long size,
  93                                  unsigned long align,
  94                                  unsigned long goal) __malloc;
  95 extern void *__alloc_bootmem_low_node(pg_data_t *pgdat,
  96                                       unsigned long size,
  97                                       unsigned long align,
  98                                       unsigned long goal) __malloc;
  99
 100 /* We are using top down, so it is safe to use 0 here */
 101 #define BOOTMEM_LOW_LIMIT 0
 102
 103 #ifndef ARCH_LOW_ADDRESS_LIMIT
 104 #define ARCH_LOW_ADDRESS_LIMIT  0xffffffffUL
 105 #endif
 106
 107 #define alloc_bootmem(x) \
 108         __alloc_bootmem(x, SMP_CACHE_BYTES, BOOTMEM_LOW_LIMIT)
 109 #define alloc_bootmem_align(x, align) \
 110         __alloc_bootmem(x, align, BOOTMEM_LOW_LIMIT)
 111 #define alloc_bootmem_nopanic(x) \
 112         __alloc_bootmem_nopanic(x, SMP_CACHE_BYTES, BOOTMEM_LOW_LIMIT)
 113 #define alloc_bootmem_pages(x) \
 114         __alloc_bootmem(x, PAGE_SIZE, BOOTMEM_LOW_LIMIT)
 115 #define alloc_bootmem_pages_nopanic(x) \
 116         __alloc_bootmem_nopanic(x, PAGE_SIZE, BOOTMEM_LOW_LIMIT)
 117 #define alloc_bootmem_node(pgdat, x) \
 118         __alloc_bootmem_node(pgdat, x, SMP_CACHE_BYTES, BOOTMEM_LOW_LIMIT)
 119 #define alloc_bootmem_node_nopanic(pgdat, x) \
 120         __alloc_bootmem_node_nopanic(pgdat, x, SMP_CACHE_BYTES, BOOTMEM_LOW_LIMIT)
 121 #define alloc_bootmem_pages_node(pgdat, x) \
 122         __alloc_bootmem_node(pgdat, x, PAGE_SIZE, BOOTMEM_LOW_LIMIT)
 123 #define alloc_bootmem_pages_node_nopanic(pgdat, x) \
 124         __alloc_bootmem_node_nopanic(pgdat, x, PAGE_SIZE, BOOTMEM_LOW_LIMIT)
 125
 126 #define alloc_bootmem_low(x) \
 127         __alloc_bootmem_low(x, SMP_CACHE_BYTES, 0)
 128 #define alloc_bootmem_low_pages_nopanic(x) \
 129         __alloc_bootmem_low_nopanic(x, PAGE_SIZE, 0)
 130 #define alloc_bootmem_low_pages(x) \
 131         __alloc_bootmem_low(x, PAGE_SIZE, 0)
 132 #define alloc_bootmem_low_pages_node(pgdat, x) \
 133         __alloc_bootmem_low_node(pgdat, x, PAGE_SIZE, 0)
 134
 135 /* FIXME: use MEMBLOCK_ALLOC_* variants here */
 136 #define BOOTMEM_ALLOC_ACCESSIBLE        0
 137 #define BOOTMEM_ALLOC_ANYWHERE          (~(phys_addr_t)0)
 138
 139 /* FIXME: Move to memblock.h at a point where we remove nobootmem.c */
 140 void *memblock_virt_alloc_try_nid_raw(phys_addr_t size, phys_addr_t align,
 141                                       phys_addr_t min_addr,
 142                                       phys_addr_t max_addr, int nid);
 143 void *memblock_virt_alloc_try_nid_nopanic(phys_addr_t size,
 144                 phys_addr_t align, phys_addr_t min_addr,
 145                 phys_addr_t max_addr, int nid);
 146 void *memblock_virt_alloc_try_nid(phys_addr_t size, phys_addr_t align,
 147                 phys_addr_t min_addr, phys_addr_t max_addr, int nid);
 148 void __memblock_free_early(phys_addr_t base, phys_addr_t size);
 149 void __memblock_free_late(phys_addr_t base, phys_addr_t size);
 150
 151 static inline void * __init memblock_virt_alloc(
 152                                         phys_addr_t size,  phys_addr_t align)
 153 {
 154         return memblock_virt_alloc_try_nid(size, align, BOOTMEM_LOW_LIMIT,
 155                                             BOOTMEM_ALLOC_ACCESSIBLE,
 156                                             NUMA_NO_NODE);
 157 }
 158
 159 static inline void * __init memblock_virt_alloc_raw(
 160                                         phys_addr_t size,  phys_addr_t align)
 161 {
 162         return memblock_virt_alloc_try_nid_raw(size, align, BOOTMEM_LOW_LIMIT,
 163                                             BOOTMEM_ALLOC_ACCESSIBLE,
 164                                             NUMA_NO_NODE);
 165 }
 166
 167 static inline void * __init memblock_virt_alloc_nopanic(
 168                                         phys_addr_t size, phys_addr_t align)
 169 {
 170         return memblock_virt_alloc_try_nid_nopanic(size, align,
 171                                                     BOOTMEM_LOW_LIMIT,
 172                                                     BOOTMEM_ALLOC_ACCESSIBLE,
 173                                                     NUMA_NO_NODE);
 174 }
 175
 176 static inline void * __init memblock_virt_alloc_low(
 177                                         phys_addr_t size, phys_addr_t align)
 178 {
 179         return memblock_virt_alloc_try_nid(size, align,
 180                                                    BOOTMEM_LOW_LIMIT,
 181                                                    ARCH_LOW_ADDRESS_LIMIT,
 182                                                    NUMA_NO_NODE);
 183 }
 184 static inline void * __init memblock_virt_alloc_low_nopanic(
 185                                         phys_addr_t size, phys_addr_t align)
 186 {
 187         return memblock_virt_alloc_try_nid_nopanic(size, align,
 188                                                    BOOTMEM_LOW_LIMIT,
 189                                                    ARCH_LOW_ADDRESS_LIMIT,
 190                                                    NUMA_NO_NODE);
 191 }
 192
 193 static inline void * __init memblock_virt_alloc_from_nopanic(
 194                 phys_addr_t size, phys_addr_t align, phys_addr_t min_addr)
 195 {
 196         return memblock_virt_alloc_try_nid_nopanic(size, align, min_addr,
 197                                                     BOOTMEM_ALLOC_ACCESSIBLE,
 198                                                     NUMA_NO_NODE);
 199 }
 200
 201 static inline void * __init memblock_virt_alloc_node(
 202                                                 phys_addr_t size, int nid)
 203 {
 204         return memblock_virt_alloc_try_nid(size, 0, BOOTMEM_LOW_LIMIT,
 205                                             BOOTMEM_ALLOC_ACCESSIBLE, nid);
 206 }
 207
 208 static inline void * __init memblock_virt_alloc_node_nopanic(
 209                                                 phys_addr_t size, int nid)
 210 {
 211         return memblock_virt_alloc_try_nid_nopanic(size, 0, BOOTMEM_LOW_LIMIT,
 212                                                     BOOTMEM_ALLOC_ACCESSIBLE,
 213                                                     nid);
 214 }
 215
 216 static inline void __init memblock_free_early(
 217                                         phys_addr_t base, phys_addr_t size)
 218 {
 219         __memblock_free_early(base, size);
 220 }
 221
 222 static inline void __init memblock_free_early_nid(
 223                                 phys_addr_t base, phys_addr_t size, int nid)
 224 {
 225         __memblock_free_early(base, size);
 226 }
 227
 228 static inline void __init memblock_free_late(
 229                                         phys_addr_t base, phys_addr_t size)
 230 {
 231         __memblock_free_late(base, size);
 232 }
 233
 234 extern void *alloc_large_system_hash(const char *tablename,
 235                                      unsigned long bucketsize,
 236                                      unsigned long numentries,
 237                                      int scale,
 238                                      int flags,
 239                                      unsigned int *_hash_shift,
 240                                      unsigned int *_hash_mask,
 241                                      unsigned long low_limit,
 242                                      unsigned long high_limit);
 243
 244 #define HASH_EARLY      0x00000001      /* Allocating during early boot? */
 245 #define HASH_SMALL      0x00000002      /* sub-page allocation allowed, min
 246                                          * shift passed via *_hash_shift */
 247 #define HASH_ZERO       0x00000004      /* Zero allocated hash table */
 248
 249 /* Only NUMA needs hash distribution. 64bit NUMA architectures have
 250  * sufficient vmalloc space.
 251  */
 252 #ifdef CONFIG_NUMA
 253 #define HASHDIST_DEFAULT IS_ENABLED(CONFIG_64BIT)
 254 extern int hashdist;            /* Distribute hashes across NUMA nodes? */
 255 #else
 256 #define hashdist (0)
 257 #endif
 258
 259
 260 #endif /* _LINUX_BOOTMEM_H */