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_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
38 struct list_head list;
41 extern unsigned long bootmem_bootmap_pages (unsigned long);
42 extern unsigned long init_bootmem (unsigned long addr, unsigned long memend);
43 extern void free_bootmem (unsigned long addr, unsigned long size);
44 extern void * __alloc_bootmem (unsigned long size,
47 extern void * __alloc_bootmem_nopanic (unsigned long size,
50 extern void * __alloc_bootmem_low(unsigned long size,
53 extern void * __alloc_bootmem_low_node(pg_data_t *pgdat,
57 extern void * __alloc_bootmem_core(struct bootmem_data *bdata,
62 #ifndef CONFIG_HAVE_ARCH_BOOTMEM_NODE
63 extern void reserve_bootmem (unsigned long addr, unsigned long size);
64 #define alloc_bootmem(x) \
65 __alloc_bootmem(x, SMP_CACHE_BYTES, __pa(MAX_DMA_ADDRESS))
66 #define alloc_bootmem_low(x) \
67 __alloc_bootmem_low(x, SMP_CACHE_BYTES, 0)
68 #define alloc_bootmem_pages(x) \
69 __alloc_bootmem(x, PAGE_SIZE, __pa(MAX_DMA_ADDRESS))
70 #define alloc_bootmem_low_pages(x) \
71 __alloc_bootmem_low(x, PAGE_SIZE, 0)
72 #endif /* !CONFIG_HAVE_ARCH_BOOTMEM_NODE */
73 extern unsigned long free_all_bootmem (void);
74 extern void * __alloc_bootmem_node (pg_data_t *pgdat,
78 extern unsigned long init_bootmem_node (pg_data_t *pgdat,
79 unsigned long freepfn,
80 unsigned long startpfn,
81 unsigned long endpfn);
82 extern void reserve_bootmem_node (pg_data_t *pgdat,
83 unsigned long physaddr,
85 extern void free_bootmem_node (pg_data_t *pgdat,
88 extern unsigned long free_all_bootmem_node (pg_data_t *pgdat);
89 #ifndef CONFIG_HAVE_ARCH_BOOTMEM_NODE
90 #define alloc_bootmem_node(pgdat, x) \
91 __alloc_bootmem_node(pgdat, x, SMP_CACHE_BYTES, __pa(MAX_DMA_ADDRESS))
92 #define alloc_bootmem_pages_node(pgdat, x) \
93 __alloc_bootmem_node(pgdat, x, PAGE_SIZE, __pa(MAX_DMA_ADDRESS))
94 #define alloc_bootmem_low_pages_node(pgdat, x) \
95 __alloc_bootmem_low_node(pgdat, x, PAGE_SIZE, 0)
96 #endif /* !CONFIG_HAVE_ARCH_BOOTMEM_NODE */
98 #ifdef CONFIG_HAVE_ARCH_ALLOC_REMAP
99 extern void *alloc_remap(int nid, unsigned long size);
101 static inline void *alloc_remap(int nid, unsigned long size)
107 extern unsigned long __meminitdata nr_kernel_pages;
108 extern unsigned long nr_all_pages;
110 extern void * alloc_large_system_hash(const char *tablename,
111 unsigned long bucketsize,
112 unsigned long numentries,
115 unsigned int *_hash_shift,
116 unsigned int *_hash_mask,
117 unsigned long limit);
119 #define HASH_HIGHMEM 0x00000001 /* Consider highmem? */
120 #define HASH_EARLY 0x00000002 /* Allocating during early boot? */
122 /* Only NUMA needs hash distribution.
123 * IA64 is known to have sufficient vmalloc space.
125 #if defined(CONFIG_NUMA) && defined(CONFIG_IA64)
126 #define HASHDIST_DEFAULT 1
128 #define HASHDIST_DEFAULT 0
130 extern int hashdist; /* Distribute hashes across NUMA nodes? */
133 #endif /* _LINUX_BOOTMEM_H */