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 bootmem_bootmap_pages (unsigned long);
45 extern unsigned long init_bootmem (unsigned long addr, unsigned long memend);
46 extern void free_bootmem (unsigned long addr, unsigned long size);
47 extern void * __alloc_bootmem (unsigned long size,
50 extern void * __alloc_bootmem_nopanic (unsigned long size,
53 extern void * __alloc_bootmem_low(unsigned long size,
56 extern void * __alloc_bootmem_low_node(pg_data_t *pgdat,
60 extern void * __alloc_bootmem_core(struct bootmem_data *bdata,
65 #ifndef CONFIG_HAVE_ARCH_BOOTMEM_NODE
66 extern void reserve_bootmem (unsigned long addr, unsigned long size);
67 #define alloc_bootmem(x) \
68 __alloc_bootmem(x, SMP_CACHE_BYTES, __pa(MAX_DMA_ADDRESS))
69 #define alloc_bootmem_low(x) \
70 __alloc_bootmem_low(x, SMP_CACHE_BYTES, 0)
71 #define alloc_bootmem_pages(x) \
72 __alloc_bootmem(x, PAGE_SIZE, __pa(MAX_DMA_ADDRESS))
73 #define alloc_bootmem_low_pages(x) \
74 __alloc_bootmem_low(x, PAGE_SIZE, 0)
75 #endif /* !CONFIG_HAVE_ARCH_BOOTMEM_NODE */
76 extern unsigned long free_all_bootmem (void);
77 extern void * __alloc_bootmem_node (pg_data_t *pgdat,
81 extern unsigned long init_bootmem_node (pg_data_t *pgdat,
82 unsigned long freepfn,
83 unsigned long startpfn,
84 unsigned long endpfn);
85 extern void reserve_bootmem_node (pg_data_t *pgdat,
86 unsigned long physaddr,
88 extern void free_bootmem_node (pg_data_t *pgdat,
91 extern unsigned long free_all_bootmem_node (pg_data_t *pgdat);
92 #ifndef CONFIG_HAVE_ARCH_BOOTMEM_NODE
93 #define alloc_bootmem_node(pgdat, x) \
94 __alloc_bootmem_node(pgdat, x, SMP_CACHE_BYTES, __pa(MAX_DMA_ADDRESS))
95 #define alloc_bootmem_pages_node(pgdat, x) \
96 __alloc_bootmem_node(pgdat, x, PAGE_SIZE, __pa(MAX_DMA_ADDRESS))
97 #define alloc_bootmem_low_pages_node(pgdat, x) \
98 __alloc_bootmem_low_node(pgdat, x, PAGE_SIZE, 0)
99 #endif /* !CONFIG_HAVE_ARCH_BOOTMEM_NODE */
101 #ifdef CONFIG_HAVE_ARCH_ALLOC_REMAP
102 extern void *alloc_remap(int nid, unsigned long size);
104 static inline void *alloc_remap(int nid, unsigned long size)
110 extern unsigned long __meminitdata nr_kernel_pages;
111 extern unsigned long nr_all_pages;
113 extern void * alloc_large_system_hash(const char *tablename,
114 unsigned long bucketsize,
115 unsigned long numentries,
118 unsigned int *_hash_shift,
119 unsigned int *_hash_mask,
120 unsigned long limit);
122 #define HASH_HIGHMEM 0x00000001 /* Consider highmem? */
123 #define HASH_EARLY 0x00000002 /* Allocating during early boot? */
125 /* Only NUMA needs hash distribution.
126 * IA64 is known to have sufficient vmalloc space.
128 #if defined(CONFIG_NUMA) && defined(CONFIG_IA64)
129 #define HASHDIST_DEFAULT 1
131 #define HASHDIST_DEFAULT 0
133 extern int hashdist; /* Distribute hashes across NUMA nodes? */
136 #endif /* _LINUX_BOOTMEM_H */