1 /*
2 * Discontiguous memory support, Kanoj Sarcar, SGI, Nov 1999
3 */
4 #ifndef _LINUX_BOOTMEM_H
5 #define _LINUX_BOOTMEM_H
6
7 #include <linux/mmzone.h>
8 #include <asm/dma.h>
9
10 /*
11 * simple boot-time physical memory area allocator.
12 */
13
14 extern unsigned long max_low_pfn;
15 extern unsigned long min_low_pfn;
16
17 /*
18 * highest page
19 */
20 extern unsigned long max_pfn;
21
22 #ifdef CONFIG_CRASH_DUMP
23 extern unsigned long saved_max_pfn;
24 #endif
25
26 /*
27 * node_bootmem_map is a map pointer - the bits represent all physical
28 * memory pages (including holes) on the node.
29 */
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;
37 } bootmem_data_t;
38
39 extern bootmem_data_t bootmem_node_data[];
40
41 extern unsigned long bootmem_bootmap_pages(unsigned long);
42
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);
48
49 extern unsigned long free_all_bootmem_node(pg_data_t *pgdat);
50 extern unsigned long free_all_bootmem(void);
51
52 extern void free_bootmem_node(pg_data_t *pgdat,
53 unsigned long addr,
54 unsigned long size);
55 extern void free_bootmem(unsigned long addr, unsigned long size);
56
57 /*
58 * Flags for reserve_bootmem (also if CONFIG_HAVE_ARCH_BOOTMEM_NODE,
59 * the architecture-specific code should honor this).
60 *
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.
64 */
65 #define BOOTMEM_DEFAULT 0
66 #define BOOTMEM_EXCLUSIVE (1<<0)
67
68 extern int reserve_bootmem_node(pg_data_t *pgdat,
69 unsigned long physaddr,
70 unsigned long size,
71 int flags);
72 #ifndef CONFIG_HAVE_ARCH_BOOTMEM_NODE
73 extern int reserve_bootmem(unsigned long addr, unsigned long size, int flags);
74 #endif
75
76 extern void *__alloc_bootmem_nopanic(unsigned long size,
77 unsigned long align,
78 unsigned long goal);
79 extern void *__alloc_bootmem(unsigned long size,
80 unsigned long align,
81 unsigned long goal);
82 extern void *__alloc_bootmem_low(unsigned long size,
83 unsigned long align,
84 unsigned long goal);
85 extern void *__alloc_bootmem_node(pg_data_t *pgdat,
86 unsigned long size,
87 unsigned long align,
88 unsigned long goal);
89 extern void *__alloc_bootmem_node_nopanic(pg_data_t *pgdat,
90 unsigned long size,
91 unsigned long align,
92 unsigned long goal);
93 extern void *__alloc_bootmem_low_node(pg_data_t *pgdat,
94 unsigned long size,
95 unsigned long align,
96 unsigned long goal);
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 */
117
118 extern int reserve_bootmem_generic(unsigned long addr, unsigned long size,
119 int flags);
120
121 extern void *alloc_bootmem_section(unsigned long size,
122 unsigned long section_nr);
123
124 #ifdef CONFIG_HAVE_ARCH_ALLOC_REMAP
125 extern void *alloc_remap(int nid, unsigned long size);
126 #else
alloc_remap(int nid,unsigned long size)127 static inline void *alloc_remap(int nid, unsigned long size)
128 {
129 return NULL;
130 }
131 #endif /* CONFIG_HAVE_ARCH_ALLOC_REMAP */
132
133 extern unsigned long __meminitdata nr_kernel_pages;
134 extern unsigned long __meminitdata nr_all_pages;
135
136 extern void *alloc_large_system_hash(const char *tablename,
137 unsigned long bucketsize,
138 unsigned long numentries,
139 int scale,
140 int flags,
141 unsigned int *_hash_shift,
142 unsigned int *_hash_mask,
143 unsigned long limit);
144
145 #define HASH_EARLY 0x00000001 /* Allocating during early boot? */
146
147 /* Only NUMA needs hash distribution.
148 * IA64 and x86_64 have sufficient vmalloc space.
149 */
150 #if defined(CONFIG_NUMA) && (defined(CONFIG_IA64) || defined(CONFIG_X86_64))
151 #define HASHDIST_DEFAULT 1
152 #else
153 #define HASHDIST_DEFAULT 0
154 #endif
155 extern int hashdist; /* Distribute hashes across NUMA nodes? */
156
157
158 #endif /* _LINUX_BOOTMEM_H */
159