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1 | #ifndef _LINUX_MEMBLOCK_H |
2 | #define _LINUX_MEMBLOCK_H | |
3 | #ifdef __KERNEL__ | |
4 | ||
5 | /* | |
6 | * Logical memory blocks. | |
7 | * | |
8 | * Copyright (C) 2001 Peter Bergner, IBM Corp. | |
9 | * | |
10 | * This program is free software; you can redistribute it and/or | |
11 | * modify it under the terms of the GNU General Public License | |
12 | * as published by the Free Software Foundation; either version | |
13 | * 2 of the License, or (at your option) any later version. | |
14 | */ | |
15 | ||
16 | #include <linux/init.h> | |
17 | #include <linux/mm.h> | |
18 | ||
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19 | #include <asm/memblock.h> |
20 | ||
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21 | #define MAX_MEMBLOCK_REGIONS 128 |
22 | ||
e3239ff9 | 23 | struct memblock_region { |
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24 | phys_addr_t base; |
25 | phys_addr_t size; | |
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26 | }; |
27 | ||
e3239ff9 | 28 | struct memblock_type { |
95f72d1e | 29 | unsigned long cnt; |
2898cc4c | 30 | phys_addr_t size; |
e3239ff9 | 31 | struct memblock_region regions[MAX_MEMBLOCK_REGIONS+1]; |
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32 | }; |
33 | ||
34 | struct memblock { | |
35 | unsigned long debug; | |
2898cc4c | 36 | phys_addr_t current_limit; |
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37 | struct memblock_type memory; |
38 | struct memblock_type reserved; | |
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39 | }; |
40 | ||
41 | extern struct memblock memblock; | |
42 | ||
43 | extern void __init memblock_init(void); | |
44 | extern void __init memblock_analyze(void); | |
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45 | extern long memblock_add(phys_addr_t base, phys_addr_t size); |
46 | extern long memblock_remove(phys_addr_t base, phys_addr_t size); | |
47 | extern long __init memblock_free(phys_addr_t base, phys_addr_t size); | |
48 | extern long __init memblock_reserve(phys_addr_t base, phys_addr_t size); | |
e63075a3 | 49 | |
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50 | extern phys_addr_t __init memblock_alloc_nid(phys_addr_t size, phys_addr_t align, int nid); |
51 | extern phys_addr_t __init memblock_alloc(phys_addr_t size, phys_addr_t align); | |
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52 | |
53 | /* Flags for memblock_alloc_base() amd __memblock_alloc_base() */ | |
2898cc4c | 54 | #define MEMBLOCK_ALLOC_ANYWHERE (~(phys_addr_t)0) |
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55 | #define MEMBLOCK_ALLOC_ACCESSIBLE 0 |
56 | ||
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57 | extern phys_addr_t __init memblock_alloc_base(phys_addr_t size, |
58 | phys_addr_t, phys_addr_t max_addr); | |
59 | extern phys_addr_t __init __memblock_alloc_base(phys_addr_t size, | |
60 | phys_addr_t align, phys_addr_t max_addr); | |
61 | extern phys_addr_t __init memblock_phys_mem_size(void); | |
62 | extern phys_addr_t memblock_end_of_DRAM(void); | |
63 | extern void __init memblock_enforce_memory_limit(phys_addr_t memory_limit); | |
64 | extern int memblock_is_memory(phys_addr_t addr); | |
65 | extern int memblock_is_region_memory(phys_addr_t base, phys_addr_t size); | |
66 | extern int __init memblock_is_reserved(phys_addr_t addr); | |
67 | extern int memblock_is_region_reserved(phys_addr_t base, phys_addr_t size); | |
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68 | |
69 | extern void memblock_dump_all(void); | |
70 | ||
35a1f0bd | 71 | /* Provided by the architecture */ |
2898cc4c | 72 | extern phys_addr_t memblock_nid_range(phys_addr_t start, phys_addr_t end, int *nid); |
35a1f0bd | 73 | |
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74 | /** |
75 | * memblock_set_current_limit - Set the current allocation limit to allow | |
76 | * limiting allocations to what is currently | |
77 | * accessible during boot | |
78 | * @limit: New limit value (physical address) | |
79 | */ | |
2898cc4c | 80 | extern void memblock_set_current_limit(phys_addr_t limit); |
e63075a3 | 81 | |
35a1f0bd | 82 | |
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83 | /* |
84 | * pfn conversion functions | |
85 | * | |
86 | * While the memory MEMBLOCKs should always be page aligned, the reserved | |
87 | * MEMBLOCKs may not be. This accessor attempt to provide a very clear | |
88 | * idea of what they return for such non aligned MEMBLOCKs. | |
89 | */ | |
90 | ||
91 | /** | |
92 | * memblock_region_base_pfn - Return the lowest pfn intersecting with the region | |
93 | * @reg: memblock_region structure | |
94 | */ | |
95 | static inline unsigned long memblock_region_base_pfn(const struct memblock_region *reg) | |
96 | { | |
97 | return reg->base >> PAGE_SHIFT; | |
98 | } | |
99 | ||
100 | /** | |
101 | * memblock_region_last_pfn - Return the highest pfn intersecting with the region | |
102 | * @reg: memblock_region structure | |
103 | */ | |
104 | static inline unsigned long memblock_region_last_pfn(const struct memblock_region *reg) | |
105 | { | |
106 | return (reg->base + reg->size - 1) >> PAGE_SHIFT; | |
107 | } | |
108 | ||
109 | /** | |
110 | * memblock_region_end_pfn - Return the pfn of the first page following the region | |
111 | * but not intersecting it | |
112 | * @reg: memblock_region structure | |
113 | */ | |
114 | static inline unsigned long memblock_region_end_pfn(const struct memblock_region *reg) | |
115 | { | |
116 | return memblock_region_last_pfn(reg) + 1; | |
117 | } | |
118 | ||
119 | /** | |
120 | * memblock_region_pages - Return the number of pages covering a region | |
121 | * @reg: memblock_region structure | |
122 | */ | |
123 | static inline unsigned long memblock_region_pages(const struct memblock_region *reg) | |
124 | { | |
125 | return memblock_region_end_pfn(reg) - memblock_region_end_pfn(reg); | |
126 | } | |
127 | ||
128 | #define for_each_memblock(memblock_type, region) \ | |
129 | for (region = memblock.memblock_type.regions; \ | |
130 | region < (memblock.memblock_type.regions + memblock.memblock_type.cnt); \ | |
131 | region++) | |
132 | ||
133 | ||
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134 | #endif /* __KERNEL__ */ |
135 | ||
136 | #endif /* _LINUX_MEMBLOCK_H */ |