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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; | |
95f72d1e YL |
27 | }; |
28 | ||
e3239ff9 | 29 | struct memblock_type { |
bf23c51f BH |
30 | unsigned long cnt; /* number of regions */ |
31 | unsigned long max; /* size of the allocated array */ | |
32 | struct memblock_region *regions; | |
95f72d1e YL |
33 | }; |
34 | ||
35 | struct memblock { | |
2898cc4c | 36 | phys_addr_t current_limit; |
4734b594 | 37 | phys_addr_t memory_size; /* Updated by memblock_analyze() */ |
e3239ff9 BH |
38 | struct memblock_type memory; |
39 | struct memblock_type reserved; | |
95f72d1e YL |
40 | }; |
41 | ||
42 | extern struct memblock memblock; | |
5e63cf43 YL |
43 | extern int memblock_debug; |
44 | extern int memblock_can_resize; | |
45 | ||
46 | #define memblock_dbg(fmt, ...) \ | |
47 | if (memblock_debug) printk(KERN_INFO pr_fmt(fmt), ##__VA_ARGS__) | |
95f72d1e | 48 | |
fc769a8e TH |
49 | phys_addr_t memblock_find_in_range(phys_addr_t start, phys_addr_t end, |
50 | phys_addr_t size, phys_addr_t align); | |
7950c407 YL |
51 | int memblock_free_reserved_regions(void); |
52 | int memblock_reserve_reserved_regions(void); | |
5303b68f | 53 | |
3661ca66 YL |
54 | extern void memblock_init(void); |
55 | extern void memblock_analyze(void); | |
2898cc4c BH |
56 | extern long memblock_add(phys_addr_t base, phys_addr_t size); |
57 | extern long memblock_remove(phys_addr_t base, phys_addr_t size); | |
3661ca66 YL |
58 | extern long memblock_free(phys_addr_t base, phys_addr_t size); |
59 | extern long memblock_reserve(phys_addr_t base, phys_addr_t size); | |
e63075a3 | 60 | |
c196f76f BH |
61 | /* The numa aware allocator is only available if |
62 | * CONFIG_ARCH_POPULATES_NODE_MAP is set | |
63 | */ | |
e6498040 TH |
64 | extern phys_addr_t memblock_find_in_range_node(phys_addr_t start, |
65 | phys_addr_t end, | |
66 | phys_addr_t size, | |
67 | phys_addr_t align, int nid); | |
3661ca66 | 68 | extern phys_addr_t memblock_alloc_nid(phys_addr_t size, phys_addr_t align, |
9d1e2492 | 69 | int nid); |
3661ca66 | 70 | extern phys_addr_t memblock_alloc_try_nid(phys_addr_t size, phys_addr_t align, |
9d1e2492 BH |
71 | int nid); |
72 | ||
3661ca66 | 73 | extern phys_addr_t memblock_alloc(phys_addr_t size, phys_addr_t align); |
e63075a3 BH |
74 | |
75 | /* Flags for memblock_alloc_base() amd __memblock_alloc_base() */ | |
2898cc4c | 76 | #define MEMBLOCK_ALLOC_ANYWHERE (~(phys_addr_t)0) |
e63075a3 BH |
77 | #define MEMBLOCK_ALLOC_ACCESSIBLE 0 |
78 | ||
3661ca66 | 79 | extern phys_addr_t memblock_alloc_base(phys_addr_t size, |
9d3c30f5 BH |
80 | phys_addr_t align, |
81 | phys_addr_t max_addr); | |
3661ca66 | 82 | extern phys_addr_t __memblock_alloc_base(phys_addr_t size, |
9d3c30f5 BH |
83 | phys_addr_t align, |
84 | phys_addr_t max_addr); | |
3661ca66 | 85 | extern phys_addr_t memblock_phys_mem_size(void); |
2898cc4c | 86 | extern phys_addr_t memblock_end_of_DRAM(void); |
3661ca66 | 87 | extern void memblock_enforce_memory_limit(phys_addr_t memory_limit); |
2898cc4c BH |
88 | extern int memblock_is_memory(phys_addr_t addr); |
89 | extern int memblock_is_region_memory(phys_addr_t base, phys_addr_t size); | |
3661ca66 | 90 | extern int memblock_is_reserved(phys_addr_t addr); |
2898cc4c | 91 | extern int memblock_is_region_reserved(phys_addr_t base, phys_addr_t size); |
95f72d1e YL |
92 | |
93 | extern void memblock_dump_all(void); | |
94 | ||
e63075a3 BH |
95 | /** |
96 | * memblock_set_current_limit - Set the current allocation limit to allow | |
97 | * limiting allocations to what is currently | |
98 | * accessible during boot | |
99 | * @limit: New limit value (physical address) | |
100 | */ | |
2898cc4c | 101 | extern void memblock_set_current_limit(phys_addr_t limit); |
e63075a3 | 102 | |
35a1f0bd | 103 | |
5b385f25 BH |
104 | /* |
105 | * pfn conversion functions | |
106 | * | |
107 | * While the memory MEMBLOCKs should always be page aligned, the reserved | |
108 | * MEMBLOCKs may not be. This accessor attempt to provide a very clear | |
109 | * idea of what they return for such non aligned MEMBLOCKs. | |
110 | */ | |
111 | ||
112 | /** | |
c7fc2de0 | 113 | * memblock_region_memory_base_pfn - Return the lowest pfn intersecting with the memory region |
5b385f25 BH |
114 | * @reg: memblock_region structure |
115 | */ | |
c7fc2de0 | 116 | static inline unsigned long memblock_region_memory_base_pfn(const struct memblock_region *reg) |
5b385f25 | 117 | { |
c7fc2de0 | 118 | return PFN_UP(reg->base); |
5b385f25 BH |
119 | } |
120 | ||
121 | /** | |
c7fc2de0 | 122 | * memblock_region_memory_end_pfn - Return the end_pfn this region |
5b385f25 BH |
123 | * @reg: memblock_region structure |
124 | */ | |
c7fc2de0 | 125 | static inline unsigned long memblock_region_memory_end_pfn(const struct memblock_region *reg) |
5b385f25 | 126 | { |
c7fc2de0 | 127 | return PFN_DOWN(reg->base + reg->size); |
5b385f25 BH |
128 | } |
129 | ||
130 | /** | |
c7fc2de0 | 131 | * memblock_region_reserved_base_pfn - Return the lowest pfn intersecting with the reserved region |
5b385f25 BH |
132 | * @reg: memblock_region structure |
133 | */ | |
c7fc2de0 | 134 | static inline unsigned long memblock_region_reserved_base_pfn(const struct memblock_region *reg) |
5b385f25 | 135 | { |
c7fc2de0 | 136 | return PFN_DOWN(reg->base); |
5b385f25 BH |
137 | } |
138 | ||
139 | /** | |
c7fc2de0 | 140 | * memblock_region_reserved_end_pfn - Return the end_pfn this region |
5b385f25 BH |
141 | * @reg: memblock_region structure |
142 | */ | |
c7fc2de0 | 143 | static inline unsigned long memblock_region_reserved_end_pfn(const struct memblock_region *reg) |
5b385f25 | 144 | { |
c7fc2de0 | 145 | return PFN_UP(reg->base + reg->size); |
5b385f25 BH |
146 | } |
147 | ||
148 | #define for_each_memblock(memblock_type, region) \ | |
149 | for (region = memblock.memblock_type.regions; \ | |
150 | region < (memblock.memblock_type.regions + memblock.memblock_type.cnt); \ | |
151 | region++) | |
152 | ||
153 | ||
10d06439 | 154 | #ifdef ARCH_DISCARD_MEMBLOCK |
67e24bcb TH |
155 | #define __init_memblock __meminit |
156 | #define __initdata_memblock __meminitdata | |
10d06439 YL |
157 | #else |
158 | #define __init_memblock | |
159 | #define __initdata_memblock | |
160 | #endif | |
161 | ||
95dde501 YL |
162 | #else |
163 | static inline phys_addr_t memblock_alloc(phys_addr_t size, phys_addr_t align) | |
164 | { | |
1f5026a7 | 165 | return 0; |
95dde501 YL |
166 | } |
167 | ||
f0b37fad YL |
168 | #endif /* CONFIG_HAVE_MEMBLOCK */ |
169 | ||
95f72d1e YL |
170 | #endif /* __KERNEL__ */ |
171 | ||
172 | #endif /* _LINUX_MEMBLOCK_H */ |