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 */
60
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