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 <asm/pgtable.h>
   8 #include <asm/dma.h>
   9 #include <linux/cache.h>
  10 #include <linux/init.h>
  11 #include <linux/mmzone.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 #ifdef CONFIG_CRASH_DUMP
  26 extern unsigned long saved_max_pfn;
  27 #endif
  28
  29 /*
  30  * node_bootmem_map is a map pointer - the bits represent all physical
  31  * memory pages (including holes) on the node.
  32  */
  33 typedef struct bootmem_data {
  34         unsigned long node_boot_start;
  35         unsigned long node_low_pfn;
  36         void *node_bootmem_map;
  37         unsigned long last_offset;
  38         unsigned long last_pos;
  39         unsigned long last_success;     /* Previous allocation point.  To speed
  40                                          * up searching */
  41 } bootmem_data_t;
  42
  43 extern unsigned long __init bootmem_bootmap_pages (unsigned long);
  44 extern unsigned long __init init_bootmem (unsigned long addr, unsigned long memend);
  45 extern void __init free_bootmem (unsigned long addr, unsigned long size);
  46 extern void * __init __alloc_bootmem_limit (unsigned long size, unsigned long align, unsigned long goal, unsigned long limit);
  47 #ifndef CONFIG_HAVE_ARCH_BOOTMEM_NODE
  48 extern void __init reserve_bootmem (unsigned long addr, unsigned long size);
  49 #define alloc_bootmem(x) \
  50         __alloc_bootmem((x), SMP_CACHE_BYTES, __pa(MAX_DMA_ADDRESS))
  51 #define alloc_bootmem_low(x) \
  52         __alloc_bootmem((x), SMP_CACHE_BYTES, 0)
  53 #define alloc_bootmem_pages(x) \
  54         __alloc_bootmem((x), PAGE_SIZE, __pa(MAX_DMA_ADDRESS))
  55 #define alloc_bootmem_low_pages(x) \
  56         __alloc_bootmem((x), PAGE_SIZE, 0)
  57
  58 #define alloc_bootmem_limit(x, limit)                                           \
  59         __alloc_bootmem_limit((x), SMP_CACHE_BYTES, __pa(MAX_DMA_ADDRESS), (limit))
  60 #define alloc_bootmem_low_limit(x, limit)                       \
  61         __alloc_bootmem_limit((x), SMP_CACHE_BYTES, 0, (limit))
  62 #define alloc_bootmem_pages_limit(x, limit)                                     \
  63         __alloc_bootmem_limit((x), PAGE_SIZE, __pa(MAX_DMA_ADDRESS), (limit))
  64 #define alloc_bootmem_low_pages_limit(x, limit)         \
  65         __alloc_bootmem_limit((x), PAGE_SIZE, 0, (limit))
  66
  67 #endif /* !CONFIG_HAVE_ARCH_BOOTMEM_NODE */
  68 extern unsigned long __init free_all_bootmem (void);
  69
  70 extern unsigned long __init init_bootmem_node (pg_data_t *pgdat, unsigned long freepfn, unsigned long startpfn, unsigned long endpfn);
  71 extern void __init reserve_bootmem_node (pg_data_t *pgdat, unsigned long physaddr, unsigned long size);
  72 extern void __init free_bootmem_node (pg_data_t *pgdat, unsigned long addr, unsigned long size);
  73 extern unsigned long __init free_all_bootmem_node (pg_data_t *pgdat);
  74 extern void * __init __alloc_bootmem_node_limit (pg_data_t *pgdat, unsigned long size, unsigned long align, unsigned long goal, unsigned long limit);
  75 #ifndef CONFIG_HAVE_ARCH_BOOTMEM_NODE
  76 #define alloc_bootmem_node(pgdat, x) \
  77         __alloc_bootmem_node((pgdat), (x), SMP_CACHE_BYTES, __pa(MAX_DMA_ADDRESS))
  78 #define alloc_bootmem_pages_node(pgdat, x) \
  79         __alloc_bootmem_node((pgdat), (x), PAGE_SIZE, __pa(MAX_DMA_ADDRESS))
  80 #define alloc_bootmem_low_pages_node(pgdat, x) \
  81         __alloc_bootmem_node((pgdat), (x), PAGE_SIZE, 0)
  82
  83 #define alloc_bootmem_node_limit(pgdat, x, limit)                               \
  84         __alloc_bootmem_node_limit((pgdat), (x), SMP_CACHE_BYTES, __pa(MAX_DMA_ADDRESS), (limit))
  85 #define alloc_bootmem_pages_node_limit(pgdat, x, limit)                         \
  86         __alloc_bootmem_node_limit((pgdat), (x), PAGE_SIZE, __pa(MAX_DMA_ADDRESS), (limit))
  87 #define alloc_bootmem_low_pages_node_limit(pgdat, x, limit)             \
  88         __alloc_bootmem_node_limit((pgdat), (x), PAGE_SIZE, 0, (limit))
  89
  90 #endif /* !CONFIG_HAVE_ARCH_BOOTMEM_NODE */
  91
  92 #ifdef CONFIG_HAVE_ARCH_ALLOC_REMAP
  93 extern void *alloc_remap(int nid, unsigned long size);
  94 #else
  95 static inline void *alloc_remap(int nid, unsigned long size)
  96 {
  97         return NULL;
  98 }
  99 #endif
 100
 101 extern unsigned long __initdata nr_kernel_pages;
 102 extern unsigned long __initdata nr_all_pages;
 103
 104 extern void *__init alloc_large_system_hash(const char *tablename,
 105                                             unsigned long bucketsize,
 106                                             unsigned long numentries,
 107                                             int scale,
 108                                             int flags,
 109                                             unsigned int *_hash_shift,
 110                                             unsigned int *_hash_mask,
 111                                             unsigned long limit);
 112
 113 #define HASH_HIGHMEM    0x00000001      /* Consider highmem? */
 114 #define HASH_EARLY      0x00000002      /* Allocating during early boot? */
 115
 116 /* Only NUMA needs hash distribution.
 117  * IA64 is known to have sufficient vmalloc space.
 118  */
 119 #if defined(CONFIG_NUMA) && defined(CONFIG_IA64)
 120 #define HASHDIST_DEFAULT 1
 121 #else
 122 #define HASHDIST_DEFAULT 0
 123 #endif
 124 extern int __initdata hashdist;         /* Distribute hashes across NUMA nodes? */
 125
 126 static inline void *__alloc_bootmem (unsigned long size, unsigned long align, unsigned long goal)
 127 {
 128         return __alloc_bootmem_limit(size, align, goal, 0);
 129 }
 130
 131 static inline void *__alloc_bootmem_node (pg_data_t *pgdat, unsigned long size, unsigned long align,
 132                                      unsigned long goal)
 133 {
 134         return __alloc_bootmem_node_limit(pgdat, size, align, goal, 0);
 135 }
 136
 137 #endif /* _LINUX_BOOTMEM_H */