LXR linux-old/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 * node_bootmem_map is a map pointer - the bits represent all physical 
  22 * memory pages (including holes) on the node.
  23 */
  24typedef struct bootmem_data {
  25        unsigned long node_boot_start;
  26        unsigned long node_low_pfn;
  27        void *node_bootmem_map;
  28        unsigned long last_offset;
  29        unsigned long last_pos;
  30} bootmem_data_t;
  31
  32extern unsigned long __init bootmem_bootmap_pages (unsigned long);
  33extern unsigned long __init init_bootmem (unsigned long addr, unsigned long memend);
  34extern void __init reserve_bootmem (unsigned long addr, unsigned long size);
  35extern void __init free_bootmem (unsigned long addr, unsigned long size);
  36extern void * __init __alloc_bootmem (unsigned long size, unsigned long align, unsigned long goal);
  37#define alloc_bootmem(x) \
  38        __alloc_bootmem((x), SMP_CACHE_BYTES, __pa(MAX_DMA_ADDRESS))
  39#define alloc_bootmem_low(x) \
  40        __alloc_bootmem((x), SMP_CACHE_BYTES, 0)
  41#define alloc_bootmem_pages(x) \
  42        __alloc_bootmem((x), PAGE_SIZE, __pa(MAX_DMA_ADDRESS))
  43#define alloc_bootmem_low_pages(x) \
  44        __alloc_bootmem((x), PAGE_SIZE, 0)
  45extern unsigned long __init free_all_bootmem (void);
  46
  47extern unsigned long __init init_bootmem_node (pg_data_t *pgdat, unsigned long freepfn, unsigned long startpfn, unsigned long endpfn);
  48extern void __init reserve_bootmem_node (pg_data_t *pgdat, unsigned long physaddr, unsigned long size);
  49extern void __init free_bootmem_node (pg_data_t *pgdat, unsigned long addr, unsigned long size);
  50extern unsigned long __init free_all_bootmem_node (pg_data_t *pgdat);
  51extern void * __init __alloc_bootmem_node (pg_data_t *pgdat, unsigned long size, unsigned long align, unsigned long goal);
  52#define alloc_bootmem_node(pgdat, x) \
  53        __alloc_bootmem_node((pgdat), (x), SMP_CACHE_BYTES, __pa(MAX_DMA_ADDRESS))
  54#define alloc_bootmem_pages_node(pgdat, x) \
  55        __alloc_bootmem_node((pgdat), (x), PAGE_SIZE, __pa(MAX_DMA_ADDRESS))
  56#define alloc_bootmem_low_pages_node(pgdat, x) \
  57        __alloc_bootmem_node((pgdat), (x), PAGE_SIZE, 0)
  58
  59#endif /* _LINUX_BOOTMEM_H */
  60