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
43 extern unsigned long __init bootmem_bootmap_pages (unsigned long);
44 extern unsigned long __init init_bootmem (unsigned long addr, unsigned long memend);
45 extern void __init free_bootmem (unsigned long addr, unsigned long size);
46 extern void * __init __alloc_bootmem_limit (unsigned long size, unsigned long align, unsigned long goal, unsigned long limit);
47 #ifndef CONFIG_HAVE_ARCH_BOOTMEM_NODE
48 extern void __init reserve_bootmem (unsigned long addr, unsigned long size);
49 #define alloc_bootmem(x) \
50 __alloc_bootmem((x), SMP_CACHE_BYTES, __pa(MAX_DMA_ADDRESS))
51 #define alloc_bootmem_low(x) \
52 __alloc_bootmem((x), SMP_CACHE_BYTES, 0)
53 #define alloc_bootmem_pages(x) \
54 __alloc_bootmem((x), PAGE_SIZE, __pa(MAX_DMA_ADDRESS))
55 #define alloc_bootmem_low_pages(x) \
56 __alloc_bootmem((x), PAGE_SIZE, 0)
58 #define alloc_bootmem_limit(x, limit) \
59 __alloc_bootmem_limit((x), SMP_CACHE_BYTES, __pa(MAX_DMA_ADDRESS), (limit))
60 #define alloc_bootmem_low_limit(x, limit) \
61 __alloc_bootmem_limit((x), SMP_CACHE_BYTES, 0, (limit))
62 #define alloc_bootmem_pages_limit(x, limit) \
63 __alloc_bootmem_limit((x), PAGE_SIZE, __pa(MAX_DMA_ADDRESS), (limit))
64 #define alloc_bootmem_low_pages_limit(x, limit) \
65 __alloc_bootmem_limit((x), PAGE_SIZE, 0, (limit))
67 #endif /* !CONFIG_HAVE_ARCH_BOOTMEM_NODE */
68 extern unsigned long __init free_all_bootmem (void);
70 extern unsigned long __init init_bootmem_node (pg_data_t *pgdat, unsigned long freepfn, unsigned long startpfn, unsigned long endpfn);
71 extern void __init reserve_bootmem_node (pg_data_t *pgdat, unsigned long physaddr, unsigned long size);
72 extern void __init free_bootmem_node (pg_data_t *pgdat, unsigned long addr, unsigned long size);
73 extern unsigned long __init free_all_bootmem_node (pg_data_t *pgdat);
74 extern void * __init __alloc_bootmem_node_limit (pg_data_t *pgdat, unsigned long size, unsigned long align, unsigned long goal, unsigned long limit);
75 #ifndef CONFIG_HAVE_ARCH_BOOTMEM_NODE
76 #define alloc_bootmem_node(pgdat, x) \
77 __alloc_bootmem_node((pgdat), (x), SMP_CACHE_BYTES, __pa(MAX_DMA_ADDRESS))
78 #define alloc_bootmem_pages_node(pgdat, x) \
79 __alloc_bootmem_node((pgdat), (x), PAGE_SIZE, __pa(MAX_DMA_ADDRESS))
80 #define alloc_bootmem_low_pages_node(pgdat, x) \
81 __alloc_bootmem_node((pgdat), (x), PAGE_SIZE, 0)
83 #define alloc_bootmem_node_limit(pgdat, x, limit) \
84 __alloc_bootmem_node_limit((pgdat), (x), SMP_CACHE_BYTES, __pa(MAX_DMA_ADDRESS), (limit))
85 #define alloc_bootmem_pages_node_limit(pgdat, x, limit) \
86 __alloc_bootmem_node_limit((pgdat), (x), PAGE_SIZE, __pa(MAX_DMA_ADDRESS), (limit))
87 #define alloc_bootmem_low_pages_node_limit(pgdat, x, limit) \
88 __alloc_bootmem_node_limit((pgdat), (x), PAGE_SIZE, 0, (limit))
90 #endif /* !CONFIG_HAVE_ARCH_BOOTMEM_NODE */
92 #ifdef CONFIG_HAVE_ARCH_ALLOC_REMAP
93 extern void *alloc_remap(int nid, unsigned long size);
95 static inline void *alloc_remap(int nid, unsigned long size)
101 extern unsigned long __initdata nr_kernel_pages;
102 extern unsigned long __initdata nr_all_pages;
104 extern void *__init alloc_large_system_hash(const char *tablename,
105 unsigned long bucketsize,
106 unsigned long numentries,
109 unsigned int *_hash_shift,
110 unsigned int *_hash_mask,
111 unsigned long limit);
113 #define HASH_HIGHMEM 0x00000001 /* Consider highmem? */
114 #define HASH_EARLY 0x00000002 /* Allocating during early boot? */
116 /* Only NUMA needs hash distribution.
117 * IA64 is known to have sufficient vmalloc space.
119 #if defined(CONFIG_NUMA) && defined(CONFIG_IA64)
120 #define HASHDIST_DEFAULT 1
122 #define HASHDIST_DEFAULT 0
124 extern int __initdata hashdist; /* Distribute hashes across NUMA nodes? */
126 static inline void *__alloc_bootmem (unsigned long size, unsigned long align, unsigned long goal)
128 return __alloc_bootmem_limit(size, align, goal, 0);
131 static inline void *__alloc_bootmem_node (pg_data_t *pgdat, unsigned long size, unsigned long align,
134 return __alloc_bootmem_node_limit(pgdat, size, align, goal, 0);
137 #endif /* _LINUX_BOOTMEM_H */