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;
24 extern unsigned long saved_max_pfn;
27 * node_bootmem_map is a map pointer - the bits represent all physical
28 * memory pages (including holes) on the node.
30 typedef struct bootmem_data {
31 unsigned long node_boot_start;
32 unsigned long node_low_pfn;
33 void *node_bootmem_map;
34 unsigned long last_offset;
35 unsigned long last_pos;
36 unsigned long last_success; /* Previous allocation point. To speed
40 extern unsigned long __init bootmem_bootmap_pages (unsigned long);
41 extern unsigned long __init init_bootmem (unsigned long addr, unsigned long memend);
42 extern void __init free_bootmem (unsigned long addr, unsigned long size);
43 extern void * __init __alloc_bootmem (unsigned long size, unsigned long align, unsigned long goal);
44 #ifndef CONFIG_HAVE_ARCH_BOOTMEM_NODE
45 extern void __init reserve_bootmem (unsigned long addr, unsigned long size);
46 #define alloc_bootmem(x) \
47 __alloc_bootmem((x), SMP_CACHE_BYTES, __pa(MAX_DMA_ADDRESS))
48 #define alloc_bootmem_low(x) \
49 __alloc_bootmem((x), SMP_CACHE_BYTES, 0)
50 #define alloc_bootmem_pages(x) \
51 __alloc_bootmem((x), PAGE_SIZE, __pa(MAX_DMA_ADDRESS))
52 #define alloc_bootmem_low_pages(x) \
53 __alloc_bootmem((x), PAGE_SIZE, 0)
54 #endif /* !CONFIG_HAVE_ARCH_BOOTMEM_NODE */
55 extern unsigned long __init free_all_bootmem (void);
57 extern unsigned long __init init_bootmem_node (pg_data_t *pgdat, unsigned long freepfn, unsigned long startpfn, unsigned long endpfn);
58 extern void __init reserve_bootmem_node (pg_data_t *pgdat, unsigned long physaddr, unsigned long size);
59 extern void __init free_bootmem_node (pg_data_t *pgdat, unsigned long addr, unsigned long size);
60 extern unsigned long __init free_all_bootmem_node (pg_data_t *pgdat);
61 extern void * __init __alloc_bootmem_node (pg_data_t *pgdat, unsigned long size, unsigned long align, unsigned long goal);
62 #ifndef CONFIG_HAVE_ARCH_BOOTMEM_NODE
63 #define alloc_bootmem_node(pgdat, x) \
64 __alloc_bootmem_node((pgdat), (x), SMP_CACHE_BYTES, __pa(MAX_DMA_ADDRESS))
65 #define alloc_bootmem_pages_node(pgdat, x) \
66 __alloc_bootmem_node((pgdat), (x), PAGE_SIZE, __pa(MAX_DMA_ADDRESS))
67 #define alloc_bootmem_low_pages_node(pgdat, x) \
68 __alloc_bootmem_node((pgdat), (x), PAGE_SIZE, 0)
69 #endif /* !CONFIG_HAVE_ARCH_BOOTMEM_NODE */
71 extern unsigned long __initdata nr_kernel_pages;
72 extern unsigned long __initdata nr_all_pages;
74 extern void *__init alloc_large_system_hash(const char *tablename,
75 unsigned long bucketsize,
76 unsigned long numentries,
79 unsigned int *_hash_shift,
80 unsigned int *_hash_mask,
83 #define HASH_HIGHMEM 0x00000001 /* Consider highmem? */
84 #define HASH_EARLY 0x00000002 /* Allocating during early boot? */
86 /* Only NUMA needs hash distribution.
87 * IA64 is known to have sufficient vmalloc space.
89 #if defined(CONFIG_NUMA) && defined(CONFIG_IA64)
90 #define HASHDIST_DEFAULT 1
92 #define HASHDIST_DEFAULT 0
94 extern int __initdata hashdist; /* Distribute hashes across NUMA nodes? */
97 #endif /* _LINUX_BOOTMEM_H */