2 * Discontiguous memory support, Kanoj Sarcar, SGI, Nov 1999
4 #ifndef _LINUX_BOOTMEM_H
5 #define _LINUX_BOOTMEM_H
7 #include <linux/mmzone.h>
11 * simple boot-time physical memory area allocator.
14 extern unsigned long max_low_pfn
;
15 extern unsigned long min_low_pfn
;
20 extern unsigned long max_pfn
;
22 #ifdef CONFIG_CRASH_DUMP
23 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_min_pfn
;
32 unsigned long node_low_pfn
;
33 void *node_bootmem_map
;
34 unsigned long last_end_off
;
35 unsigned long hint_idx
;
36 struct list_head list
;
39 extern bootmem_data_t bootmem_node_data
[];
41 extern unsigned long bootmem_bootmap_pages(unsigned long);
43 extern unsigned long init_bootmem_node(pg_data_t
*pgdat
,
44 unsigned long freepfn
,
45 unsigned long startpfn
,
46 unsigned long endpfn
);
47 extern unsigned long init_bootmem(unsigned long addr
, unsigned long memend
);
49 extern unsigned long free_all_bootmem_node(pg_data_t
*pgdat
);
50 extern unsigned long free_all_bootmem(void);
52 extern void free_bootmem_node(pg_data_t
*pgdat
,
55 extern void free_bootmem(unsigned long addr
, unsigned long size
);
58 * Flags for reserve_bootmem (also if CONFIG_HAVE_ARCH_BOOTMEM_NODE,
59 * the architecture-specific code should honor this).
61 * If flags is 0, then the return value is always 0 (success). If
62 * flags contains BOOTMEM_EXCLUSIVE, then -EBUSY is returned if the
63 * memory already was reserved.
65 #define BOOTMEM_DEFAULT 0
66 #define BOOTMEM_EXCLUSIVE (1<<0)
68 extern int reserve_bootmem_node(pg_data_t
*pgdat
,
69 unsigned long physaddr
,
72 #ifndef CONFIG_HAVE_ARCH_BOOTMEM_NODE
73 extern int reserve_bootmem(unsigned long addr
, unsigned long size
, int flags
);
76 extern void *__alloc_bootmem_nopanic(unsigned long size
,
79 extern void *__alloc_bootmem(unsigned long size
,
82 extern void *__alloc_bootmem_low(unsigned long size
,
85 extern void *__alloc_bootmem_node(pg_data_t
*pgdat
,
89 extern void *__alloc_bootmem_node_nopanic(pg_data_t
*pgdat
,
93 extern void *__alloc_bootmem_low_node(pg_data_t
*pgdat
,
97 #ifndef CONFIG_HAVE_ARCH_BOOTMEM_NODE
98 #define alloc_bootmem(x) \
99 __alloc_bootmem(x, SMP_CACHE_BYTES, __pa(MAX_DMA_ADDRESS))
100 #define alloc_bootmem_nopanic(x) \
101 __alloc_bootmem_nopanic(x, SMP_CACHE_BYTES, __pa(MAX_DMA_ADDRESS))
102 #define alloc_bootmem_low(x) \
103 __alloc_bootmem_low(x, SMP_CACHE_BYTES, 0)
104 #define alloc_bootmem_pages(x) \
105 __alloc_bootmem(x, PAGE_SIZE, __pa(MAX_DMA_ADDRESS))
106 #define alloc_bootmem_pages_nopanic(x) \
107 __alloc_bootmem_nopanic(x, PAGE_SIZE, __pa(MAX_DMA_ADDRESS))
108 #define alloc_bootmem_low_pages(x) \
109 __alloc_bootmem_low(x, PAGE_SIZE, 0)
110 #define alloc_bootmem_node(pgdat, x) \
111 __alloc_bootmem_node(pgdat, x, SMP_CACHE_BYTES, __pa(MAX_DMA_ADDRESS))
112 #define alloc_bootmem_pages_node(pgdat, x) \
113 __alloc_bootmem_node(pgdat, x, PAGE_SIZE, __pa(MAX_DMA_ADDRESS))
114 #define alloc_bootmem_low_pages_node(pgdat, x) \
115 __alloc_bootmem_low_node(pgdat, x, PAGE_SIZE, 0)
116 #endif /* !CONFIG_HAVE_ARCH_BOOTMEM_NODE */
118 extern int reserve_bootmem_generic(unsigned long addr
, unsigned long size
,
121 extern void *alloc_bootmem_section(unsigned long size
,
122 unsigned long section_nr
);
124 #ifdef CONFIG_HAVE_ARCH_ALLOC_REMAP
125 extern void *alloc_remap(int nid
, unsigned long size
);
127 static inline void *alloc_remap(int nid
, unsigned long size
)
131 #endif /* CONFIG_HAVE_ARCH_ALLOC_REMAP */
133 extern unsigned long __meminitdata nr_kernel_pages
;
134 extern unsigned long __meminitdata nr_all_pages
;
136 extern void *alloc_large_system_hash(const char *tablename
,
137 unsigned long bucketsize
,
138 unsigned long numentries
,
141 unsigned int *_hash_shift
,
142 unsigned int *_hash_mask
,
143 unsigned long limit
);
145 #define HASH_EARLY 0x00000001 /* Allocating during early boot? */
147 /* Only NUMA needs hash distribution.
148 * IA64 and x86_64 have sufficient vmalloc space.
150 #if defined(CONFIG_NUMA) && (defined(CONFIG_IA64) || defined(CONFIG_X86_64))
151 #define HASHDIST_DEFAULT 1
153 #define HASHDIST_DEFAULT 0
155 extern int hashdist
; /* Distribute hashes across NUMA nodes? */
158 #endif /* _LINUX_BOOTMEM_H */