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
;
23 extern unsigned long max_pfn
;
26 * node_bootmem_map is a map pointer - the bits represent all physical
27 * memory pages (including holes) on the node.
29 typedef 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
39 extern unsigned long __init
bootmem_bootmap_pages (unsigned long);
40 extern unsigned long __init
init_bootmem (unsigned long addr
, unsigned long memend
);
41 extern void __init
free_bootmem (unsigned long addr
, unsigned long size
);
42 extern void * __init
__alloc_bootmem (unsigned long size
, unsigned long align
, unsigned long goal
);
43 #ifndef CONFIG_HAVE_ARCH_BOOTMEM_NODE
44 extern 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 */
54 extern unsigned long __init
free_all_bootmem (void);
56 extern unsigned long __init
init_bootmem_node (pg_data_t
*pgdat
, unsigned long freepfn
, unsigned long startpfn
, unsigned long endpfn
);
57 extern void __init
reserve_bootmem_node (pg_data_t
*pgdat
, unsigned long physaddr
, unsigned long size
);
58 extern void __init
free_bootmem_node (pg_data_t
*pgdat
, unsigned long addr
, unsigned long size
);
59 extern unsigned long __init
free_all_bootmem_node (pg_data_t
*pgdat
);
60 extern 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 */
70 #endif /* _LINUX_BOOTMEM_H */