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;
25 #ifdef CONFIG_CRASH_DUMP
26 extern unsigned long saved_max_pfn;
30 * node_bootmem_map is a map pointer - the bits represent all physical
31 * memory pages (including holes) on the node.
33 typedef struct bootmem_data {
34 unsigned long node_boot_start;
35 unsigned long node_low_pfn;
36 void *node_bootmem_map;
37 unsigned long last_offset;
38 unsigned long last_pos;
39 unsigned long last_success; /* Previous allocation point. To speed
41 struct list_head list;
44 extern unsigned long __init bootmem_bootmap_pages (unsigned long);
45 extern unsigned long __init init_bootmem (unsigned long addr, unsigned long memend);
46 extern void __init free_bootmem (unsigned long addr, unsigned long size);
47 extern void * __init __alloc_bootmem (unsigned long size, unsigned long align, unsigned long goal);
48 extern void * __init __alloc_bootmem_nopanic (unsigned long size, unsigned long align, unsigned long goal);
49 extern void * __init __alloc_bootmem_low(unsigned long size,
52 extern void * __init __alloc_bootmem_low_node(pg_data_t *pgdat,
56 extern void * __init __alloc_bootmem_core(struct bootmem_data *bdata,
57 unsigned long size, unsigned long align, unsigned long goal,
59 #ifndef CONFIG_HAVE_ARCH_BOOTMEM_NODE
60 extern void __init reserve_bootmem (unsigned long addr, unsigned long size);
61 #define alloc_bootmem(x) \
62 __alloc_bootmem((x), SMP_CACHE_BYTES, __pa(MAX_DMA_ADDRESS))
63 #define alloc_bootmem_low(x) \
64 __alloc_bootmem_low((x), SMP_CACHE_BYTES, 0)
65 #define alloc_bootmem_pages(x) \
66 __alloc_bootmem((x), PAGE_SIZE, __pa(MAX_DMA_ADDRESS))
67 #define alloc_bootmem_low_pages(x) \
68 __alloc_bootmem_low((x), PAGE_SIZE, 0)
69 #endif /* !CONFIG_HAVE_ARCH_BOOTMEM_NODE */
70 extern unsigned long __init free_all_bootmem (void);
71 extern void * __init __alloc_bootmem_node (pg_data_t *pgdat, unsigned long size, unsigned long align, unsigned long goal);
72 extern unsigned long __init init_bootmem_node (pg_data_t *pgdat, unsigned long freepfn, unsigned long startpfn, unsigned long endpfn);
73 extern void __init reserve_bootmem_node (pg_data_t *pgdat, unsigned long physaddr, unsigned long size);
74 extern void __init free_bootmem_node (pg_data_t *pgdat, unsigned long addr, unsigned long size);
75 extern unsigned long __init free_all_bootmem_node (pg_data_t *pgdat);
76 #ifndef CONFIG_HAVE_ARCH_BOOTMEM_NODE
77 #define alloc_bootmem_node(pgdat, x) \
78 __alloc_bootmem_node((pgdat), (x), SMP_CACHE_BYTES, __pa(MAX_DMA_ADDRESS))
79 #define alloc_bootmem_pages_node(pgdat, x) \
80 __alloc_bootmem_node((pgdat), (x), PAGE_SIZE, __pa(MAX_DMA_ADDRESS))
81 #define alloc_bootmem_low_pages_node(pgdat, x) \
82 __alloc_bootmem_low_node((pgdat), (x), PAGE_SIZE, 0)
83 #endif /* !CONFIG_HAVE_ARCH_BOOTMEM_NODE */
85 #ifdef CONFIG_HAVE_ARCH_ALLOC_REMAP
86 extern void *alloc_remap(int nid, unsigned long size);
88 static inline void *alloc_remap(int nid, unsigned long size)
94 extern unsigned long nr_kernel_pages;
95 extern unsigned long nr_all_pages;
97 extern void *__init alloc_large_system_hash(const char *tablename,
98 unsigned long bucketsize,
99 unsigned long numentries,
102 unsigned int *_hash_shift,
103 unsigned int *_hash_mask,
104 unsigned long limit);
106 #define HASH_HIGHMEM 0x00000001 /* Consider highmem? */
107 #define HASH_EARLY 0x00000002 /* Allocating during early boot? */
109 /* Only NUMA needs hash distribution.
110 * IA64 is known to have sufficient vmalloc space.
112 #if defined(CONFIG_NUMA) && defined(CONFIG_IA64)
113 #define HASHDIST_DEFAULT 1
115 #define HASHDIST_DEFAULT 0
117 extern int __initdata hashdist; /* Distribute hashes across NUMA nodes? */
120 #endif /* _LINUX_BOOTMEM_H */