2 * Discontiguous memory support, Kanoj Sarcar, SGI, Nov 1999
4 #ifndef _LINUX_BOOTMEM_H
5 #define _LINUX_BOOTMEM_H
7 #include <asm/pgtable.h>
9 #include <linux/cache.h>
10 #include <linux/init.h>
11 #include <linux/mmzone.h>
14 * simple boot-time physical memory area allocator.
17 extern unsigned long max_low_pfn;
18 extern unsigned long min_low_pfn;
19 extern unsigned long max_pfn;
22 * node_bootmem_map is a map pointer - the bits represent all physical
23 * memory pages (including holes) on the node.
25 typedef struct bootmem_data {
26 unsigned long node_boot_start;
27 unsigned long node_low_pfn;
28 void *node_bootmem_map;
29 unsigned long last_offset;
30 unsigned long last_pos;
33 extern unsigned long __init bootmem_bootmap_pages (unsigned long);
34 extern unsigned long __init init_bootmem (unsigned long addr, unsigned long memend);
35 extern void __init reserve_bootmem (unsigned long addr, unsigned long size);
36 extern void __init free_bootmem (unsigned long addr, unsigned long size);
37 extern void * __init __alloc_bootmem (unsigned long size, unsigned long align, unsigned long goal);
38 #define alloc_bootmem(x) \
39 __alloc_bootmem((x), SMP_CACHE_BYTES, __pa(MAX_DMA_ADDRESS))
40 #define alloc_bootmem_low(x) \
41 __alloc_bootmem((x), SMP_CACHE_BYTES, 0)
42 #define alloc_bootmem_pages(x) \
43 __alloc_bootmem((x), PAGE_SIZE, __pa(MAX_DMA_ADDRESS))
44 #define alloc_bootmem_low_pages(x) \
45 __alloc_bootmem((x), PAGE_SIZE, 0)
46 extern unsigned long __init free_all_bootmem (void);
48 extern unsigned long __init init_bootmem_node (pg_data_t *pgdat, unsigned long freepfn, unsigned long startpfn, unsigned long endpfn);
49 extern void __init reserve_bootmem_node (pg_data_t *pgdat, unsigned long physaddr, unsigned long size);
50 extern void __init free_bootmem_node (pg_data_t *pgdat, unsigned long addr, unsigned long size);
51 extern unsigned long __init free_all_bootmem_node (pg_data_t *pgdat);
52 extern void * __init __alloc_bootmem_node (pg_data_t *pgdat, unsigned long size, unsigned long align, unsigned long goal);
53 #define alloc_bootmem_node(pgdat, x) \
54 __alloc_bootmem_node((pgdat), (x), SMP_CACHE_BYTES, __pa(MAX_DMA_ADDRESS))
55 #define alloc_bootmem_pages_node(pgdat, x) \
56 __alloc_bootmem_node((pgdat), (x), PAGE_SIZE, __pa(MAX_DMA_ADDRESS))
57 #define alloc_bootmem_low_pages_node(pgdat, x) \
58 __alloc_bootmem_node((pgdat), (x), PAGE_SIZE, 0)
60 #endif /* _LINUX_BOOTMEM_H */