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