LXR linux-bk/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
  17extern unsigned long max_low_pfn;
  18extern unsigned long min_low_pfn;
  19
  20/*
  21 * highest page
  22 */
  23extern unsigned long max_pfn;
  24
  25/*
  26 * node_bootmem_map is a map pointer - the bits represent all physical 
  27 * memory pages (including holes) on the node.
  28 */
  29typedef struct bootmem_data {
  30        unsigned long node_boot_start;
  31        unsigned long node_low_pfn;
  32        void *node_bootmem_map;
  33        unsigned long last_offset;
  34        unsigned long last_pos;
  35        unsigned long last_success;     /* Previous allocation point.  To speed
  36                                         * up searching */
  37} bootmem_data_t;
  38
  39extern unsigned long __init bootmem_bootmap_pages (unsigned long);
  40extern unsigned long __init init_bootmem (unsigned long addr, unsigned long memend);
  41extern void __init free_bootmem (unsigned long addr, unsigned long size);
  42extern void * __init __alloc_bootmem (unsigned long size, unsigned long align, unsigned long goal);
  43#ifndef CONFIG_HAVE_ARCH_BOOTMEM_NODE
  44extern void __init reserve_bootmem (unsigned long addr, unsigned long size);
  45#define alloc_bootmem(x) \
  46        __alloc_bootmem((x), SMP_CACHE_BYTES, __pa(MAX_DMA_ADDRESS))
  47#define alloc_bootmem_low(x) \
  48        __alloc_bootmem((x), SMP_CACHE_BYTES, 0)
  49#define alloc_bootmem_pages(x) \
  50        __alloc_bootmem((x), PAGE_SIZE, __pa(MAX_DMA_ADDRESS))
  51#define alloc_bootmem_low_pages(x) \
  52        __alloc_bootmem((x), PAGE_SIZE, 0)
  53#endif /* !CONFIG_HAVE_ARCH_BOOTMEM_NODE */
  54extern unsigned long __init free_all_bootmem (void);
  55
  56extern unsigned long __init init_bootmem_node (pg_data_t *pgdat, unsigned long freepfn, unsigned long startpfn, unsigned long endpfn);
  57extern void __init reserve_bootmem_node (pg_data_t *pgdat, unsigned long physaddr, unsigned long size);
  58extern void __init free_bootmem_node (pg_data_t *pgdat, unsigned long addr, unsigned long size);
  59extern unsigned long __init free_all_bootmem_node (pg_data_t *pgdat);
  60extern void * __init __alloc_bootmem_node (pg_data_t *pgdat, unsigned long size, unsigned long align, unsigned long goal);
  61#ifndef CONFIG_HAVE_ARCH_BOOTMEM_NODE
  62#define alloc_bootmem_node(pgdat, x) \
  63        __alloc_bootmem_node((pgdat), (x), SMP_CACHE_BYTES, __pa(MAX_DMA_ADDRESS))
  64#define alloc_bootmem_pages_node(pgdat, x) \
  65        __alloc_bootmem_node((pgdat), (x), PAGE_SIZE, __pa(MAX_DMA_ADDRESS))
  66#define alloc_bootmem_low_pages_node(pgdat, x) \
  67        __alloc_bootmem_node((pgdat), (x), PAGE_SIZE, 0)
  68#endif /* !CONFIG_HAVE_ARCH_BOOTMEM_NODE */
  69
  70extern void *__init alloc_large_system_hash(const char *tablename,
  71                                            unsigned long bucketsize,
  72                                            unsigned long numentries,
  73                                            int scale,
  74                                            int consider_highmem,
  75                                            unsigned int *_hash_shift,
  76                                            unsigned int *_hash_mask);
  77
  78#endif /* _LINUX_BOOTMEM_H */
  79