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1 | #ifndef _LINUX_MEMBLOCK_H |
2 | #define _LINUX_MEMBLOCK_H |
3 | #ifdef __KERNEL__ |
4 | |
5 | #define MEMBLOCK_ERROR 0 |
6 | |
7 | #ifdef CONFIG_HAVE_MEMBLOCK |
8 | /* |
9 | * Logical memory blocks. |
10 | * |
11 | * Copyright (C) 2001 Peter Bergner, IBM Corp. |
12 | * |
13 | * This program is free software; you can redistribute it and/or |
14 | * modify it under the terms of the GNU General Public License |
15 | * as published by the Free Software Foundation; either version |
16 | * 2 of the License, or (at your option) any later version. |
17 | */ |
18 | |
19 | #include <linux/init.h> |
20 | #include <linux/mm.h> |
21 | |
22 | #include <asm/memblock.h> |
23 | |
24 | #define INIT_MEMBLOCK_REGIONS 128 |
25 | |
26 | struct memblock_region { |
27 | phys_addr_t base; |
28 | phys_addr_t size; |
29 | }; |
30 | |
31 | struct memblock_type { |
32 | unsigned long cnt; /* number of regions */ |
33 | unsigned long max; /* size of the allocated array */ |
34 | struct memblock_region *regions; |
35 | }; |
36 | |
37 | struct memblock { |
38 | phys_addr_t current_limit; |
39 | phys_addr_t memory_size; /* Updated by memblock_analyze() */ |
40 | struct memblock_type memory; |
41 | struct memblock_type reserved; |
42 | }; |
43 | |
44 | extern struct memblock memblock; |
45 | extern int memblock_debug; |
46 | extern int memblock_can_resize; |
47 | |
48 | #define memblock_dbg(fmt, ...) \ |
49 | if (memblock_debug) printk(KERN_INFO pr_fmt(fmt), ##__VA_ARGS__) |
50 | |
51 | u64 memblock_find_in_range(u64 start, u64 end, u64 size, u64 align); |
52 | int memblock_free_reserved_regions(void); |
53 | int memblock_reserve_reserved_regions(void); |
54 | |
55 | extern void memblock_init(void); |
56 | extern void memblock_analyze(void); |
57 | extern long memblock_add(phys_addr_t base, phys_addr_t size); |
58 | extern long memblock_remove(phys_addr_t base, phys_addr_t size); |
59 | extern long memblock_free(phys_addr_t base, phys_addr_t size); |
60 | extern long memblock_reserve(phys_addr_t base, phys_addr_t size); |
61 | |
62 | /* The numa aware allocator is only available if |
63 | * CONFIG_ARCH_POPULATES_NODE_MAP is set |
64 | */ |
65 | extern phys_addr_t memblock_alloc_nid(phys_addr_t size, phys_addr_t align, |
66 | int nid); |
67 | extern phys_addr_t memblock_alloc_try_nid(phys_addr_t size, phys_addr_t align, |
68 | int nid); |
69 | |
70 | extern phys_addr_t memblock_alloc(phys_addr_t size, phys_addr_t align); |
71 | |
72 | /* Flags for memblock_alloc_base() amd __memblock_alloc_base() */ |
73 | #define MEMBLOCK_ALLOC_ANYWHERE (~(phys_addr_t)0) |
74 | #define MEMBLOCK_ALLOC_ACCESSIBLE 0 |
75 | |
76 | extern phys_addr_t memblock_alloc_base(phys_addr_t size, |
77 | phys_addr_t align, |
78 | phys_addr_t max_addr); |
79 | extern phys_addr_t __memblock_alloc_base(phys_addr_t size, |
80 | phys_addr_t align, |
81 | phys_addr_t max_addr); |
82 | extern phys_addr_t memblock_phys_mem_size(void); |
83 | extern phys_addr_t memblock_end_of_DRAM(void); |
84 | extern void memblock_enforce_memory_limit(phys_addr_t memory_limit); |
85 | extern int memblock_is_memory(phys_addr_t addr); |
86 | extern int memblock_is_region_memory(phys_addr_t base, phys_addr_t size); |
87 | extern int memblock_is_reserved(phys_addr_t addr); |
88 | extern int memblock_is_region_reserved(phys_addr_t base, phys_addr_t size); |
89 | |
90 | extern void memblock_dump_all(void); |
91 | |
92 | /* Provided by the architecture */ |
93 | extern phys_addr_t memblock_nid_range(phys_addr_t start, phys_addr_t end, int *nid); |
94 | extern int memblock_memory_can_coalesce(phys_addr_t addr1, phys_addr_t size1, |
95 | phys_addr_t addr2, phys_addr_t size2); |
96 | |
97 | /** |
98 | * memblock_set_current_limit - Set the current allocation limit to allow |
99 | * limiting allocations to what is currently |
100 | * accessible during boot |
101 | * @limit: New limit value (physical address) |
102 | */ |
103 | extern void memblock_set_current_limit(phys_addr_t limit); |
104 | |
105 | |
106 | /* |
107 | * pfn conversion functions |
108 | * |
109 | * While the memory MEMBLOCKs should always be page aligned, the reserved |
110 | * MEMBLOCKs may not be. This accessor attempt to provide a very clear |
111 | * idea of what they return for such non aligned MEMBLOCKs. |
112 | */ |
113 | |
114 | /** |
115 | * memblock_region_memory_base_pfn - Return the lowest pfn intersecting with the memory region |
116 | * @reg: memblock_region structure |
117 | */ |
118 | static inline unsigned long memblock_region_memory_base_pfn(const struct memblock_region *reg) |
119 | { |
120 | return PFN_UP(reg->base); |
121 | } |
122 | |
123 | /** |
124 | * memblock_region_memory_end_pfn - Return the end_pfn this region |
125 | * @reg: memblock_region structure |
126 | */ |
127 | static inline unsigned long memblock_region_memory_end_pfn(const struct memblock_region *reg) |
128 | { |
129 | return PFN_DOWN(reg->base + reg->size); |
130 | } |
131 | |
132 | /** |
133 | * memblock_region_reserved_base_pfn - Return the lowest pfn intersecting with the reserved region |
134 | * @reg: memblock_region structure |
135 | */ |
136 | static inline unsigned long memblock_region_reserved_base_pfn(const struct memblock_region *reg) |
137 | { |
138 | return PFN_DOWN(reg->base); |
139 | } |
140 | |
141 | /** |
142 | * memblock_region_reserved_end_pfn - Return the end_pfn this region |
143 | * @reg: memblock_region structure |
144 | */ |
145 | static inline unsigned long memblock_region_reserved_end_pfn(const struct memblock_region *reg) |
146 | { |
147 | return PFN_UP(reg->base + reg->size); |
148 | } |
149 | |
150 | #define for_each_memblock(memblock_type, region) \ |
151 | for (region = memblock.memblock_type.regions; \ |
152 | region < (memblock.memblock_type.regions + memblock.memblock_type.cnt); \ |
153 | region++) |
154 | |
155 | |
156 | #ifdef ARCH_DISCARD_MEMBLOCK |
157 | #define __init_memblock __init |
158 | #define __initdata_memblock __initdata |
159 | #else |
160 | #define __init_memblock |
161 | #define __initdata_memblock |
162 | #endif |
163 | |
164 | #else |
165 | static inline phys_addr_t memblock_alloc(phys_addr_t size, phys_addr_t align) |
166 | { |
167 | return MEMBLOCK_ERROR; |
168 | } |
169 | |
170 | #endif /* CONFIG_HAVE_MEMBLOCK */ |
171 | |
172 | #endif /* __KERNEL__ */ |
173 | |
174 | #endif /* _LINUX_MEMBLOCK_H */ |
175 |
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