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  * node_bootmem_map is a map pointer - the bits represent all physical
  22  * memory pages (including holes) on the node.
  23  */
  24 typedef 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
  32 extern unsigned long __init bootmem_bootmap_pages (unsigned long);
  33 extern unsigned long __init init_bootmem (unsigned long addr, unsigned long memend);
  34 extern void __init reserve_bootmem (unsigned long addr, unsigned long size);
  35 extern void __init free_bootmem (unsigned long addr, unsigned long size);
  36 extern 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)
  45 extern unsigned long __init free_all_bootmem (void);
  46
  47 extern unsigned long __init init_bootmem_node (pg_data_t *pgdat, unsigned long freepfn, unsigned long startpfn, unsigned long endpfn);
  48 extern void __init reserve_bootmem_node (pg_data_t *pgdat, unsigned long physaddr, unsigned long size);
  49 extern void __init free_bootmem_node (pg_data_t *pgdat, unsigned long addr, unsigned long size);
  50 extern unsigned long __init free_all_bootmem_node (pg_data_t *pgdat);
  51 extern 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 */