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95f72d1e YL |
1 | #ifndef _LINUX_MEMBLOCK_H |
2 | #define _LINUX_MEMBLOCK_H | |
3 | #ifdef __KERNEL__ | |
4 | ||
f0b37fad | 5 | #ifdef CONFIG_HAVE_MEMBLOCK |
95f72d1e YL |
6 | /* |
7 | * Logical memory blocks. | |
8 | * | |
9 | * Copyright (C) 2001 Peter Bergner, IBM Corp. | |
10 | * | |
11 | * This program is free software; you can redistribute it and/or | |
12 | * modify it under the terms of the GNU General Public License | |
13 | * as published by the Free Software Foundation; either version | |
14 | * 2 of the License, or (at your option) any later version. | |
15 | */ | |
16 | ||
17 | #include <linux/init.h> | |
18 | #include <linux/mm.h> | |
19 | ||
411a25a8 BH |
20 | #include <asm/memblock.h> |
21 | ||
37d8d4bf | 22 | #define INIT_MEMBLOCK_REGIONS 128 |
95f72d1e | 23 | |
e3239ff9 | 24 | struct memblock_region { |
2898cc4c BH |
25 | phys_addr_t base; |
26 | phys_addr_t size; | |
7c0caeb8 TH |
27 | #ifdef CONFIG_HAVE_MEMBLOCK_NODE_MAP |
28 | int nid; | |
29 | #endif | |
95f72d1e YL |
30 | }; |
31 | ||
e3239ff9 | 32 | struct memblock_type { |
bf23c51f BH |
33 | unsigned long cnt; /* number of regions */ |
34 | unsigned long max; /* size of the allocated array */ | |
35 | struct memblock_region *regions; | |
95f72d1e YL |
36 | }; |
37 | ||
38 | struct memblock { | |
2898cc4c | 39 | phys_addr_t current_limit; |
4734b594 | 40 | phys_addr_t memory_size; /* Updated by memblock_analyze() */ |
e3239ff9 BH |
41 | struct memblock_type memory; |
42 | struct memblock_type reserved; | |
95f72d1e YL |
43 | }; |
44 | ||
45 | extern struct memblock memblock; | |
5e63cf43 YL |
46 | extern int memblock_debug; |
47 | extern int memblock_can_resize; | |
48 | ||
49 | #define memblock_dbg(fmt, ...) \ | |
50 | if (memblock_debug) printk(KERN_INFO pr_fmt(fmt), ##__VA_ARGS__) | |
95f72d1e | 51 | |
fc769a8e TH |
52 | phys_addr_t memblock_find_in_range(phys_addr_t start, phys_addr_t end, |
53 | phys_addr_t size, phys_addr_t align); | |
7950c407 YL |
54 | int memblock_free_reserved_regions(void); |
55 | int memblock_reserve_reserved_regions(void); | |
5303b68f | 56 | |
3661ca66 YL |
57 | extern void memblock_init(void); |
58 | extern void memblock_analyze(void); | |
2898cc4c BH |
59 | extern long memblock_add(phys_addr_t base, phys_addr_t size); |
60 | extern long memblock_remove(phys_addr_t base, phys_addr_t size); | |
3661ca66 YL |
61 | extern long memblock_free(phys_addr_t base, phys_addr_t size); |
62 | extern long memblock_reserve(phys_addr_t base, phys_addr_t size); | |
e63075a3 | 63 | |
7c0caeb8 TH |
64 | #ifdef CONFIG_HAVE_MEMBLOCK_NODE_MAP |
65 | extern int memblock_set_node(phys_addr_t base, phys_addr_t size, int nid); | |
66 | ||
67 | static inline void memblock_set_region_node(struct memblock_region *r, int nid) | |
68 | { | |
69 | r->nid = nid; | |
70 | } | |
71 | ||
72 | static inline int memblock_get_region_node(const struct memblock_region *r) | |
73 | { | |
74 | return r->nid; | |
75 | } | |
76 | #else | |
77 | static inline void memblock_set_region_node(struct memblock_region *r, int nid) | |
78 | { | |
79 | } | |
80 | ||
81 | static inline int memblock_get_region_node(const struct memblock_region *r) | |
82 | { | |
83 | return 0; | |
84 | } | |
85 | #endif /* CONFIG_HAVE_MEMBLOCK_NODE_MAP */ | |
86 | ||
c196f76f BH |
87 | /* The numa aware allocator is only available if |
88 | * CONFIG_ARCH_POPULATES_NODE_MAP is set | |
89 | */ | |
e6498040 TH |
90 | extern phys_addr_t memblock_find_in_range_node(phys_addr_t start, |
91 | phys_addr_t end, | |
92 | phys_addr_t size, | |
93 | phys_addr_t align, int nid); | |
3661ca66 | 94 | extern phys_addr_t memblock_alloc_nid(phys_addr_t size, phys_addr_t align, |
9d1e2492 | 95 | int nid); |
3661ca66 | 96 | extern phys_addr_t memblock_alloc_try_nid(phys_addr_t size, phys_addr_t align, |
9d1e2492 BH |
97 | int nid); |
98 | ||
3661ca66 | 99 | extern phys_addr_t memblock_alloc(phys_addr_t size, phys_addr_t align); |
e63075a3 BH |
100 | |
101 | /* Flags for memblock_alloc_base() amd __memblock_alloc_base() */ | |
2898cc4c | 102 | #define MEMBLOCK_ALLOC_ANYWHERE (~(phys_addr_t)0) |
e63075a3 BH |
103 | #define MEMBLOCK_ALLOC_ACCESSIBLE 0 |
104 | ||
3661ca66 | 105 | extern phys_addr_t memblock_alloc_base(phys_addr_t size, |
9d3c30f5 BH |
106 | phys_addr_t align, |
107 | phys_addr_t max_addr); | |
3661ca66 | 108 | extern phys_addr_t __memblock_alloc_base(phys_addr_t size, |
9d3c30f5 BH |
109 | phys_addr_t align, |
110 | phys_addr_t max_addr); | |
3661ca66 | 111 | extern phys_addr_t memblock_phys_mem_size(void); |
2898cc4c | 112 | extern phys_addr_t memblock_end_of_DRAM(void); |
3661ca66 | 113 | extern void memblock_enforce_memory_limit(phys_addr_t memory_limit); |
2898cc4c BH |
114 | extern int memblock_is_memory(phys_addr_t addr); |
115 | extern int memblock_is_region_memory(phys_addr_t base, phys_addr_t size); | |
3661ca66 | 116 | extern int memblock_is_reserved(phys_addr_t addr); |
2898cc4c | 117 | extern int memblock_is_region_reserved(phys_addr_t base, phys_addr_t size); |
95f72d1e YL |
118 | |
119 | extern void memblock_dump_all(void); | |
120 | ||
e63075a3 BH |
121 | /** |
122 | * memblock_set_current_limit - Set the current allocation limit to allow | |
123 | * limiting allocations to what is currently | |
124 | * accessible during boot | |
125 | * @limit: New limit value (physical address) | |
126 | */ | |
2898cc4c | 127 | extern void memblock_set_current_limit(phys_addr_t limit); |
e63075a3 | 128 | |
35a1f0bd | 129 | |
5b385f25 BH |
130 | /* |
131 | * pfn conversion functions | |
132 | * | |
133 | * While the memory MEMBLOCKs should always be page aligned, the reserved | |
134 | * MEMBLOCKs may not be. This accessor attempt to provide a very clear | |
135 | * idea of what they return for such non aligned MEMBLOCKs. | |
136 | */ | |
137 | ||
138 | /** | |
c7fc2de0 | 139 | * memblock_region_memory_base_pfn - Return the lowest pfn intersecting with the memory region |
5b385f25 BH |
140 | * @reg: memblock_region structure |
141 | */ | |
c7fc2de0 | 142 | static inline unsigned long memblock_region_memory_base_pfn(const struct memblock_region *reg) |
5b385f25 | 143 | { |
c7fc2de0 | 144 | return PFN_UP(reg->base); |
5b385f25 BH |
145 | } |
146 | ||
147 | /** | |
c7fc2de0 | 148 | * memblock_region_memory_end_pfn - Return the end_pfn this region |
5b385f25 BH |
149 | * @reg: memblock_region structure |
150 | */ | |
c7fc2de0 | 151 | static inline unsigned long memblock_region_memory_end_pfn(const struct memblock_region *reg) |
5b385f25 | 152 | { |
c7fc2de0 | 153 | return PFN_DOWN(reg->base + reg->size); |
5b385f25 BH |
154 | } |
155 | ||
156 | /** | |
c7fc2de0 | 157 | * memblock_region_reserved_base_pfn - Return the lowest pfn intersecting with the reserved region |
5b385f25 BH |
158 | * @reg: memblock_region structure |
159 | */ | |
c7fc2de0 | 160 | static inline unsigned long memblock_region_reserved_base_pfn(const struct memblock_region *reg) |
5b385f25 | 161 | { |
c7fc2de0 | 162 | return PFN_DOWN(reg->base); |
5b385f25 BH |
163 | } |
164 | ||
165 | /** | |
c7fc2de0 | 166 | * memblock_region_reserved_end_pfn - Return the end_pfn this region |
5b385f25 BH |
167 | * @reg: memblock_region structure |
168 | */ | |
c7fc2de0 | 169 | static inline unsigned long memblock_region_reserved_end_pfn(const struct memblock_region *reg) |
5b385f25 | 170 | { |
c7fc2de0 | 171 | return PFN_UP(reg->base + reg->size); |
5b385f25 BH |
172 | } |
173 | ||
174 | #define for_each_memblock(memblock_type, region) \ | |
175 | for (region = memblock.memblock_type.regions; \ | |
176 | region < (memblock.memblock_type.regions + memblock.memblock_type.cnt); \ | |
177 | region++) | |
178 | ||
179 | ||
10d06439 | 180 | #ifdef ARCH_DISCARD_MEMBLOCK |
67e24bcb TH |
181 | #define __init_memblock __meminit |
182 | #define __initdata_memblock __meminitdata | |
10d06439 YL |
183 | #else |
184 | #define __init_memblock | |
185 | #define __initdata_memblock | |
186 | #endif | |
187 | ||
95dde501 YL |
188 | #else |
189 | static inline phys_addr_t memblock_alloc(phys_addr_t size, phys_addr_t align) | |
190 | { | |
1f5026a7 | 191 | return 0; |
95dde501 YL |
192 | } |
193 | ||
f0b37fad YL |
194 | #endif /* CONFIG_HAVE_MEMBLOCK */ |
195 | ||
95f72d1e YL |
196 | #endif /* __KERNEL__ */ |
197 | ||
198 | #endif /* _LINUX_MEMBLOCK_H */ |