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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 | #define INIT_MEMBLOCK_REGIONS 128 |
21 | |
22 | struct memblock_region { |
23 | phys_addr_t base; |
24 | phys_addr_t size; |
25 | #ifdef CONFIG_HAVE_MEMBLOCK_NODE_MAP |
26 | int nid; |
27 | #endif |
28 | }; |
29 | |
30 | struct memblock_type { |
31 | unsigned long cnt; /* number of regions */ |
32 | unsigned long max; /* size of the allocated array */ |
33 | phys_addr_t total_size; /* size of all regions */ |
34 | struct memblock_region *regions; |
35 | }; |
36 | |
37 | struct memblock { |
38 | phys_addr_t current_limit; |
39 | struct memblock_type memory; |
40 | struct memblock_type reserved; |
41 | }; |
42 | |
43 | extern struct memblock memblock; |
44 | extern int memblock_debug; |
45 | |
46 | #define memblock_dbg(fmt, ...) \ |
47 | if (memblock_debug) printk(KERN_INFO pr_fmt(fmt), ##__VA_ARGS__) |
48 | |
49 | phys_addr_t memblock_find_in_range_node(phys_addr_t start, phys_addr_t end, |
50 | phys_addr_t size, phys_addr_t align, int nid); |
51 | phys_addr_t memblock_find_in_range(phys_addr_t start, phys_addr_t end, |
52 | phys_addr_t size, phys_addr_t align); |
53 | phys_addr_t get_allocated_memblock_reserved_regions_info(phys_addr_t *addr); |
54 | void memblock_allow_resize(void); |
55 | int memblock_add_node(phys_addr_t base, phys_addr_t size, int nid); |
56 | int memblock_add(phys_addr_t base, phys_addr_t size); |
57 | int memblock_remove(phys_addr_t base, phys_addr_t size); |
58 | int memblock_free(phys_addr_t base, phys_addr_t size); |
59 | int memblock_reserve(phys_addr_t base, phys_addr_t size); |
60 | void memblock_trim_memory(phys_addr_t align); |
61 | |
62 | #ifdef CONFIG_HAVE_MEMBLOCK_NODE_MAP |
63 | int memblock_search_pfn_nid(unsigned long pfn, unsigned long *start_pfn, |
64 | unsigned long *end_pfn); |
65 | void __next_mem_pfn_range(int *idx, int nid, unsigned long *out_start_pfn, |
66 | unsigned long *out_end_pfn, int *out_nid); |
67 | |
68 | /** |
69 | * for_each_mem_pfn_range - early memory pfn range iterator |
70 | * @i: an integer used as loop variable |
71 | * @nid: node selector, %MAX_NUMNODES for all nodes |
72 | * @p_start: ptr to ulong for start pfn of the range, can be %NULL |
73 | * @p_end: ptr to ulong for end pfn of the range, can be %NULL |
74 | * @p_nid: ptr to int for nid of the range, can be %NULL |
75 | * |
76 | * Walks over configured memory ranges. |
77 | */ |
78 | #define for_each_mem_pfn_range(i, nid, p_start, p_end, p_nid) \ |
79 | for (i = -1, __next_mem_pfn_range(&i, nid, p_start, p_end, p_nid); \ |
80 | i >= 0; __next_mem_pfn_range(&i, nid, p_start, p_end, p_nid)) |
81 | #endif /* CONFIG_HAVE_MEMBLOCK_NODE_MAP */ |
82 | |
83 | void __next_free_mem_range(u64 *idx, int nid, phys_addr_t *out_start, |
84 | phys_addr_t *out_end, int *out_nid); |
85 | |
86 | /** |
87 | * for_each_free_mem_range - iterate through free memblock areas |
88 | * @i: u64 used as loop variable |
89 | * @nid: node selector, %MAX_NUMNODES for all nodes |
90 | * @p_start: ptr to phys_addr_t for start address of the range, can be %NULL |
91 | * @p_end: ptr to phys_addr_t for end address of the range, can be %NULL |
92 | * @p_nid: ptr to int for nid of the range, can be %NULL |
93 | * |
94 | * Walks over free (memory && !reserved) areas of memblock. Available as |
95 | * soon as memblock is initialized. |
96 | */ |
97 | #define for_each_free_mem_range(i, nid, p_start, p_end, p_nid) \ |
98 | for (i = 0, \ |
99 | __next_free_mem_range(&i, nid, p_start, p_end, p_nid); \ |
100 | i != (u64)ULLONG_MAX; \ |
101 | __next_free_mem_range(&i, nid, p_start, p_end, p_nid)) |
102 | |
103 | void __next_free_mem_range_rev(u64 *idx, int nid, phys_addr_t *out_start, |
104 | phys_addr_t *out_end, int *out_nid); |
105 | |
106 | /** |
107 | * for_each_free_mem_range_reverse - rev-iterate through free memblock areas |
108 | * @i: u64 used as loop variable |
109 | * @nid: node selector, %MAX_NUMNODES for all nodes |
110 | * @p_start: ptr to phys_addr_t for start address of the range, can be %NULL |
111 | * @p_end: ptr to phys_addr_t for end address of the range, can be %NULL |
112 | * @p_nid: ptr to int for nid of the range, can be %NULL |
113 | * |
114 | * Walks over free (memory && !reserved) areas of memblock in reverse |
115 | * order. Available as soon as memblock is initialized. |
116 | */ |
117 | #define for_each_free_mem_range_reverse(i, nid, p_start, p_end, p_nid) \ |
118 | for (i = (u64)ULLONG_MAX, \ |
119 | __next_free_mem_range_rev(&i, nid, p_start, p_end, p_nid); \ |
120 | i != (u64)ULLONG_MAX; \ |
121 | __next_free_mem_range_rev(&i, nid, p_start, p_end, p_nid)) |
122 | |
123 | #ifdef CONFIG_HAVE_MEMBLOCK_NODE_MAP |
124 | int memblock_set_node(phys_addr_t base, phys_addr_t size, int nid); |
125 | |
126 | static inline void memblock_set_region_node(struct memblock_region *r, int nid) |
127 | { |
128 | r->nid = nid; |
129 | } |
130 | |
131 | static inline int memblock_get_region_node(const struct memblock_region *r) |
132 | { |
133 | return r->nid; |
134 | } |
135 | #else |
136 | static inline void memblock_set_region_node(struct memblock_region *r, int nid) |
137 | { |
138 | } |
139 | |
140 | static inline int memblock_get_region_node(const struct memblock_region *r) |
141 | { |
142 | return 0; |
143 | } |
144 | #endif /* CONFIG_HAVE_MEMBLOCK_NODE_MAP */ |
145 | |
146 | phys_addr_t memblock_alloc_nid(phys_addr_t size, phys_addr_t align, int nid); |
147 | phys_addr_t memblock_alloc_try_nid(phys_addr_t size, phys_addr_t align, int nid); |
148 | |
149 | phys_addr_t memblock_alloc(phys_addr_t size, phys_addr_t align); |
150 | |
151 | /* Flags for memblock_alloc_base() amd __memblock_alloc_base() */ |
152 | #define MEMBLOCK_ALLOC_ANYWHERE (~(phys_addr_t)0) |
153 | #define MEMBLOCK_ALLOC_ACCESSIBLE 0 |
154 | |
155 | phys_addr_t memblock_alloc_base(phys_addr_t size, phys_addr_t align, |
156 | phys_addr_t max_addr); |
157 | phys_addr_t __memblock_alloc_base(phys_addr_t size, phys_addr_t align, |
158 | phys_addr_t max_addr); |
159 | phys_addr_t memblock_phys_mem_size(void); |
160 | phys_addr_t memblock_mem_size(unsigned long limit_pfn); |
161 | phys_addr_t memblock_start_of_DRAM(void); |
162 | phys_addr_t memblock_end_of_DRAM(void); |
163 | void memblock_enforce_memory_limit(phys_addr_t memory_limit); |
164 | int memblock_is_memory(phys_addr_t addr); |
165 | int memblock_is_region_memory(phys_addr_t base, phys_addr_t size); |
166 | int memblock_is_reserved(phys_addr_t addr); |
167 | int memblock_is_region_reserved(phys_addr_t base, phys_addr_t size); |
168 | |
169 | extern void __memblock_dump_all(void); |
170 | |
171 | static inline void memblock_dump_all(void) |
172 | { |
173 | if (memblock_debug) |
174 | __memblock_dump_all(); |
175 | } |
176 | |
177 | /** |
178 | * memblock_set_current_limit - Set the current allocation limit to allow |
179 | * limiting allocations to what is currently |
180 | * accessible during boot |
181 | * @limit: New limit value (physical address) |
182 | */ |
183 | void memblock_set_current_limit(phys_addr_t limit); |
184 | |
185 | |
186 | /* |
187 | * pfn conversion functions |
188 | * |
189 | * While the memory MEMBLOCKs should always be page aligned, the reserved |
190 | * MEMBLOCKs may not be. This accessor attempt to provide a very clear |
191 | * idea of what they return for such non aligned MEMBLOCKs. |
192 | */ |
193 | |
194 | /** |
195 | * memblock_region_memory_base_pfn - Return the lowest pfn intersecting with the memory region |
196 | * @reg: memblock_region structure |
197 | */ |
198 | static inline unsigned long memblock_region_memory_base_pfn(const struct memblock_region *reg) |
199 | { |
200 | return PFN_UP(reg->base); |
201 | } |
202 | |
203 | /** |
204 | * memblock_region_memory_end_pfn - Return the end_pfn this region |
205 | * @reg: memblock_region structure |
206 | */ |
207 | static inline unsigned long memblock_region_memory_end_pfn(const struct memblock_region *reg) |
208 | { |
209 | return PFN_DOWN(reg->base + reg->size); |
210 | } |
211 | |
212 | /** |
213 | * memblock_region_reserved_base_pfn - Return the lowest pfn intersecting with the reserved region |
214 | * @reg: memblock_region structure |
215 | */ |
216 | static inline unsigned long memblock_region_reserved_base_pfn(const struct memblock_region *reg) |
217 | { |
218 | return PFN_DOWN(reg->base); |
219 | } |
220 | |
221 | /** |
222 | * memblock_region_reserved_end_pfn - Return the end_pfn this region |
223 | * @reg: memblock_region structure |
224 | */ |
225 | static inline unsigned long memblock_region_reserved_end_pfn(const struct memblock_region *reg) |
226 | { |
227 | return PFN_UP(reg->base + reg->size); |
228 | } |
229 | |
230 | #define for_each_memblock(memblock_type, region) \ |
231 | for (region = memblock.memblock_type.regions; \ |
232 | region < (memblock.memblock_type.regions + memblock.memblock_type.cnt); \ |
233 | region++) |
234 | |
235 | |
236 | #ifdef CONFIG_ARCH_DISCARD_MEMBLOCK |
237 | #define __init_memblock __meminit |
238 | #define __initdata_memblock __meminitdata |
239 | #else |
240 | #define __init_memblock |
241 | #define __initdata_memblock |
242 | #endif |
243 | |
244 | #else |
245 | static inline phys_addr_t memblock_alloc(phys_addr_t size, phys_addr_t align) |
246 | { |
247 | return 0; |
248 | } |
249 | |
250 | #endif /* CONFIG_HAVE_MEMBLOCK */ |
251 | |
252 | #endif /* __KERNEL__ */ |
253 | |
254 | #endif /* _LINUX_MEMBLOCK_H */ |
255 |
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