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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 | ||
37d8d4bf | 20 | #define INIT_MEMBLOCK_REGIONS 128 |
70210ed9 | 21 | #define INIT_PHYSMEM_REGIONS 4 |
95f72d1e | 22 | |
66b16edf TC |
23 | /* Definition of memblock flags. */ |
24 | #define MEMBLOCK_HOTPLUG 0x1 /* hotpluggable region */ | |
25 | ||
e3239ff9 | 26 | struct memblock_region { |
2898cc4c BH |
27 | phys_addr_t base; |
28 | phys_addr_t size; | |
66a20757 | 29 | unsigned long flags; |
7c0caeb8 TH |
30 | #ifdef CONFIG_HAVE_MEMBLOCK_NODE_MAP |
31 | int nid; | |
32 | #endif | |
95f72d1e YL |
33 | }; |
34 | ||
e3239ff9 | 35 | struct memblock_type { |
bf23c51f BH |
36 | unsigned long cnt; /* number of regions */ |
37 | unsigned long max; /* size of the allocated array */ | |
1440c4e2 | 38 | phys_addr_t total_size; /* size of all regions */ |
bf23c51f | 39 | struct memblock_region *regions; |
95f72d1e YL |
40 | }; |
41 | ||
42 | struct memblock { | |
79442ed1 | 43 | bool bottom_up; /* is bottom up direction? */ |
2898cc4c | 44 | phys_addr_t current_limit; |
e3239ff9 BH |
45 | struct memblock_type memory; |
46 | struct memblock_type reserved; | |
70210ed9 PH |
47 | #ifdef CONFIG_HAVE_MEMBLOCK_PHYS_MAP |
48 | struct memblock_type physmem; | |
49 | #endif | |
95f72d1e YL |
50 | }; |
51 | ||
52 | extern struct memblock memblock; | |
5e63cf43 | 53 | extern int memblock_debug; |
55ac590c TC |
54 | #ifdef CONFIG_MOVABLE_NODE |
55 | /* If movable_node boot option specified */ | |
56 | extern bool movable_node_enabled; | |
57 | #endif /* CONFIG_MOVABLE_NODE */ | |
5e63cf43 YL |
58 | |
59 | #define memblock_dbg(fmt, ...) \ | |
60 | if (memblock_debug) printk(KERN_INFO pr_fmt(fmt), ##__VA_ARGS__) | |
95f72d1e | 61 | |
87029ee9 GS |
62 | phys_addr_t memblock_find_in_range_node(phys_addr_t size, phys_addr_t align, |
63 | phys_addr_t start, phys_addr_t end, | |
64 | int nid); | |
fc769a8e TH |
65 | phys_addr_t memblock_find_in_range(phys_addr_t start, phys_addr_t end, |
66 | phys_addr_t size, phys_addr_t align); | |
29f67386 | 67 | phys_addr_t get_allocated_memblock_reserved_regions_info(phys_addr_t *addr); |
5e270e25 | 68 | phys_addr_t get_allocated_memblock_memory_regions_info(phys_addr_t *addr); |
1aadc056 | 69 | void memblock_allow_resize(void); |
7fb0bc3f | 70 | int memblock_add_node(phys_addr_t base, phys_addr_t size, int nid); |
581adcbe TH |
71 | int memblock_add(phys_addr_t base, phys_addr_t size); |
72 | int memblock_remove(phys_addr_t base, phys_addr_t size); | |
73 | int memblock_free(phys_addr_t base, phys_addr_t size); | |
74 | int memblock_reserve(phys_addr_t base, phys_addr_t size); | |
6ede1fd3 | 75 | void memblock_trim_memory(phys_addr_t align); |
66b16edf TC |
76 | int memblock_mark_hotplug(phys_addr_t base, phys_addr_t size); |
77 | int memblock_clear_hotplug(phys_addr_t base, phys_addr_t size); | |
f1af9d3a PH |
78 | |
79 | /* Low level functions */ | |
80 | int memblock_add_range(struct memblock_type *type, | |
81 | phys_addr_t base, phys_addr_t size, | |
82 | int nid, unsigned long flags); | |
83 | ||
84 | int memblock_remove_range(struct memblock_type *type, | |
85 | phys_addr_t base, | |
86 | phys_addr_t size); | |
87 | ||
88 | void __next_mem_range(u64 *idx, int nid, struct memblock_type *type_a, | |
89 | struct memblock_type *type_b, phys_addr_t *out_start, | |
90 | phys_addr_t *out_end, int *out_nid); | |
91 | ||
92 | void __next_mem_range_rev(u64 *idx, int nid, struct memblock_type *type_a, | |
93 | struct memblock_type *type_b, phys_addr_t *out_start, | |
94 | phys_addr_t *out_end, int *out_nid); | |
95 | ||
96 | /** | |
97 | * for_each_mem_range - iterate through memblock areas from type_a and not | |
98 | * included in type_b. Or just type_a if type_b is NULL. | |
99 | * @i: u64 used as loop variable | |
100 | * @type_a: ptr to memblock_type to iterate | |
101 | * @type_b: ptr to memblock_type which excludes from the iteration | |
102 | * @nid: node selector, %NUMA_NO_NODE for all nodes | |
103 | * @p_start: ptr to phys_addr_t for start address of the range, can be %NULL | |
104 | * @p_end: ptr to phys_addr_t for end address of the range, can be %NULL | |
105 | * @p_nid: ptr to int for nid of the range, can be %NULL | |
106 | */ | |
107 | #define for_each_mem_range(i, type_a, type_b, nid, \ | |
108 | p_start, p_end, p_nid) \ | |
109 | for (i = 0, __next_mem_range(&i, nid, type_a, type_b, \ | |
110 | p_start, p_end, p_nid); \ | |
111 | i != (u64)ULLONG_MAX; \ | |
112 | __next_mem_range(&i, nid, type_a, type_b, \ | |
113 | p_start, p_end, p_nid)) | |
114 | ||
115 | /** | |
116 | * for_each_mem_range_rev - reverse iterate through memblock areas from | |
117 | * type_a and not included in type_b. Or just type_a if type_b is NULL. | |
118 | * @i: u64 used as loop variable | |
119 | * @type_a: ptr to memblock_type to iterate | |
120 | * @type_b: ptr to memblock_type which excludes from the iteration | |
121 | * @nid: node selector, %NUMA_NO_NODE for all nodes | |
122 | * @p_start: ptr to phys_addr_t for start address of the range, can be %NULL | |
123 | * @p_end: ptr to phys_addr_t for end address of the range, can be %NULL | |
124 | * @p_nid: ptr to int for nid of the range, can be %NULL | |
125 | */ | |
126 | #define for_each_mem_range_rev(i, type_a, type_b, nid, \ | |
127 | p_start, p_end, p_nid) \ | |
128 | for (i = (u64)ULLONG_MAX, \ | |
129 | __next_mem_range_rev(&i, nid, type_a, type_b, \ | |
130 | p_start, p_end, p_nid); \ | |
131 | i != (u64)ULLONG_MAX; \ | |
132 | __next_mem_range_rev(&i, nid, type_a, type_b, \ | |
133 | p_start, p_end, p_nid)) | |
134 | ||
55ac590c TC |
135 | #ifdef CONFIG_MOVABLE_NODE |
136 | static inline bool memblock_is_hotpluggable(struct memblock_region *m) | |
137 | { | |
138 | return m->flags & MEMBLOCK_HOTPLUG; | |
139 | } | |
140 | ||
141 | static inline bool movable_node_is_enabled(void) | |
142 | { | |
143 | return movable_node_enabled; | |
144 | } | |
145 | #else | |
146 | static inline bool memblock_is_hotpluggable(struct memblock_region *m) | |
147 | { | |
148 | return false; | |
149 | } | |
150 | static inline bool movable_node_is_enabled(void) | |
151 | { | |
152 | return false; | |
153 | } | |
154 | #endif | |
e63075a3 | 155 | |
0ee332c1 | 156 | #ifdef CONFIG_HAVE_MEMBLOCK_NODE_MAP |
e76b63f8 YL |
157 | int memblock_search_pfn_nid(unsigned long pfn, unsigned long *start_pfn, |
158 | unsigned long *end_pfn); | |
0ee332c1 TH |
159 | void __next_mem_pfn_range(int *idx, int nid, unsigned long *out_start_pfn, |
160 | unsigned long *out_end_pfn, int *out_nid); | |
161 | ||
162 | /** | |
163 | * for_each_mem_pfn_range - early memory pfn range iterator | |
164 | * @i: an integer used as loop variable | |
165 | * @nid: node selector, %MAX_NUMNODES for all nodes | |
166 | * @p_start: ptr to ulong for start pfn of the range, can be %NULL | |
167 | * @p_end: ptr to ulong for end pfn of the range, can be %NULL | |
168 | * @p_nid: ptr to int for nid of the range, can be %NULL | |
169 | * | |
f2d52fe5 | 170 | * Walks over configured memory ranges. |
0ee332c1 TH |
171 | */ |
172 | #define for_each_mem_pfn_range(i, nid, p_start, p_end, p_nid) \ | |
173 | for (i = -1, __next_mem_pfn_range(&i, nid, p_start, p_end, p_nid); \ | |
174 | i >= 0; __next_mem_pfn_range(&i, nid, p_start, p_end, p_nid)) | |
175 | #endif /* CONFIG_HAVE_MEMBLOCK_NODE_MAP */ | |
176 | ||
35fd0808 TH |
177 | /** |
178 | * for_each_free_mem_range - iterate through free memblock areas | |
179 | * @i: u64 used as loop variable | |
b1154233 | 180 | * @nid: node selector, %NUMA_NO_NODE for all nodes |
35fd0808 TH |
181 | * @p_start: ptr to phys_addr_t for start address of the range, can be %NULL |
182 | * @p_end: ptr to phys_addr_t for end address of the range, can be %NULL | |
183 | * @p_nid: ptr to int for nid of the range, can be %NULL | |
184 | * | |
185 | * Walks over free (memory && !reserved) areas of memblock. Available as | |
186 | * soon as memblock is initialized. | |
187 | */ | |
188 | #define for_each_free_mem_range(i, nid, p_start, p_end, p_nid) \ | |
f1af9d3a PH |
189 | for_each_mem_range(i, &memblock.memory, &memblock.reserved, \ |
190 | nid, p_start, p_end, p_nid) | |
7bd0b0f0 TH |
191 | |
192 | /** | |
193 | * for_each_free_mem_range_reverse - rev-iterate through free memblock areas | |
194 | * @i: u64 used as loop variable | |
b1154233 | 195 | * @nid: node selector, %NUMA_NO_NODE for all nodes |
7bd0b0f0 TH |
196 | * @p_start: ptr to phys_addr_t for start address of the range, can be %NULL |
197 | * @p_end: ptr to phys_addr_t for end address of the range, can be %NULL | |
198 | * @p_nid: ptr to int for nid of the range, can be %NULL | |
199 | * | |
200 | * Walks over free (memory && !reserved) areas of memblock in reverse | |
201 | * order. Available as soon as memblock is initialized. | |
202 | */ | |
203 | #define for_each_free_mem_range_reverse(i, nid, p_start, p_end, p_nid) \ | |
f1af9d3a PH |
204 | for_each_mem_range_rev(i, &memblock.memory, &memblock.reserved, \ |
205 | nid, p_start, p_end, p_nid) | |
7bd0b0f0 | 206 | |
66b16edf TC |
207 | static inline void memblock_set_region_flags(struct memblock_region *r, |
208 | unsigned long flags) | |
209 | { | |
210 | r->flags |= flags; | |
211 | } | |
212 | ||
213 | static inline void memblock_clear_region_flags(struct memblock_region *r, | |
214 | unsigned long flags) | |
215 | { | |
216 | r->flags &= ~flags; | |
217 | } | |
218 | ||
7c0caeb8 | 219 | #ifdef CONFIG_HAVE_MEMBLOCK_NODE_MAP |
e7e8de59 TC |
220 | int memblock_set_node(phys_addr_t base, phys_addr_t size, |
221 | struct memblock_type *type, int nid); | |
7c0caeb8 TH |
222 | |
223 | static inline void memblock_set_region_node(struct memblock_region *r, int nid) | |
224 | { | |
225 | r->nid = nid; | |
226 | } | |
227 | ||
228 | static inline int memblock_get_region_node(const struct memblock_region *r) | |
229 | { | |
230 | return r->nid; | |
231 | } | |
232 | #else | |
233 | static inline void memblock_set_region_node(struct memblock_region *r, int nid) | |
234 | { | |
235 | } | |
236 | ||
237 | static inline int memblock_get_region_node(const struct memblock_region *r) | |
238 | { | |
239 | return 0; | |
240 | } | |
241 | #endif /* CONFIG_HAVE_MEMBLOCK_NODE_MAP */ | |
242 | ||
581adcbe TH |
243 | phys_addr_t memblock_alloc_nid(phys_addr_t size, phys_addr_t align, int nid); |
244 | phys_addr_t memblock_alloc_try_nid(phys_addr_t size, phys_addr_t align, int nid); | |
9d1e2492 | 245 | |
581adcbe | 246 | phys_addr_t memblock_alloc(phys_addr_t size, phys_addr_t align); |
e63075a3 | 247 | |
79442ed1 TC |
248 | #ifdef CONFIG_MOVABLE_NODE |
249 | /* | |
250 | * Set the allocation direction to bottom-up or top-down. | |
251 | */ | |
2cfb3665 | 252 | static inline void __init memblock_set_bottom_up(bool enable) |
79442ed1 TC |
253 | { |
254 | memblock.bottom_up = enable; | |
255 | } | |
256 | ||
257 | /* | |
258 | * Check if the allocation direction is bottom-up or not. | |
259 | * if this is true, that said, memblock will allocate memory | |
260 | * in bottom-up direction. | |
261 | */ | |
262 | static inline bool memblock_bottom_up(void) | |
263 | { | |
264 | return memblock.bottom_up; | |
265 | } | |
266 | #else | |
2cfb3665 | 267 | static inline void __init memblock_set_bottom_up(bool enable) {} |
79442ed1 TC |
268 | static inline bool memblock_bottom_up(void) { return false; } |
269 | #endif | |
270 | ||
e63075a3 | 271 | /* Flags for memblock_alloc_base() amd __memblock_alloc_base() */ |
2898cc4c | 272 | #define MEMBLOCK_ALLOC_ANYWHERE (~(phys_addr_t)0) |
e63075a3 BH |
273 | #define MEMBLOCK_ALLOC_ACCESSIBLE 0 |
274 | ||
2bfc2862 AM |
275 | phys_addr_t __init memblock_alloc_range(phys_addr_t size, phys_addr_t align, |
276 | phys_addr_t start, phys_addr_t end); | |
581adcbe TH |
277 | phys_addr_t memblock_alloc_base(phys_addr_t size, phys_addr_t align, |
278 | phys_addr_t max_addr); | |
279 | phys_addr_t __memblock_alloc_base(phys_addr_t size, phys_addr_t align, | |
280 | phys_addr_t max_addr); | |
281 | phys_addr_t memblock_phys_mem_size(void); | |
595ad9af | 282 | phys_addr_t memblock_mem_size(unsigned long limit_pfn); |
581adcbe TH |
283 | phys_addr_t memblock_start_of_DRAM(void); |
284 | phys_addr_t memblock_end_of_DRAM(void); | |
285 | void memblock_enforce_memory_limit(phys_addr_t memory_limit); | |
286 | int memblock_is_memory(phys_addr_t addr); | |
287 | int memblock_is_region_memory(phys_addr_t base, phys_addr_t size); | |
288 | int memblock_is_reserved(phys_addr_t addr); | |
289 | int memblock_is_region_reserved(phys_addr_t base, phys_addr_t size); | |
290 | ||
4ff7b82f TH |
291 | extern void __memblock_dump_all(void); |
292 | ||
293 | static inline void memblock_dump_all(void) | |
294 | { | |
295 | if (memblock_debug) | |
296 | __memblock_dump_all(); | |
297 | } | |
95f72d1e | 298 | |
e63075a3 BH |
299 | /** |
300 | * memblock_set_current_limit - Set the current allocation limit to allow | |
301 | * limiting allocations to what is currently | |
302 | * accessible during boot | |
303 | * @limit: New limit value (physical address) | |
304 | */ | |
581adcbe | 305 | void memblock_set_current_limit(phys_addr_t limit); |
e63075a3 | 306 | |
35a1f0bd | 307 | |
fec51014 LA |
308 | phys_addr_t memblock_get_current_limit(void); |
309 | ||
5b385f25 BH |
310 | /* |
311 | * pfn conversion functions | |
312 | * | |
313 | * While the memory MEMBLOCKs should always be page aligned, the reserved | |
314 | * MEMBLOCKs may not be. This accessor attempt to provide a very clear | |
315 | * idea of what they return for such non aligned MEMBLOCKs. | |
316 | */ | |
317 | ||
318 | /** | |
c7fc2de0 | 319 | * memblock_region_memory_base_pfn - Return the lowest pfn intersecting with the memory region |
5b385f25 BH |
320 | * @reg: memblock_region structure |
321 | */ | |
c7fc2de0 | 322 | static inline unsigned long memblock_region_memory_base_pfn(const struct memblock_region *reg) |
5b385f25 | 323 | { |
c7fc2de0 | 324 | return PFN_UP(reg->base); |
5b385f25 BH |
325 | } |
326 | ||
327 | /** | |
c7fc2de0 | 328 | * memblock_region_memory_end_pfn - Return the end_pfn this region |
5b385f25 BH |
329 | * @reg: memblock_region structure |
330 | */ | |
c7fc2de0 | 331 | static inline unsigned long memblock_region_memory_end_pfn(const struct memblock_region *reg) |
5b385f25 | 332 | { |
c7fc2de0 | 333 | return PFN_DOWN(reg->base + reg->size); |
5b385f25 BH |
334 | } |
335 | ||
336 | /** | |
c7fc2de0 | 337 | * memblock_region_reserved_base_pfn - Return the lowest pfn intersecting with the reserved region |
5b385f25 BH |
338 | * @reg: memblock_region structure |
339 | */ | |
c7fc2de0 | 340 | static inline unsigned long memblock_region_reserved_base_pfn(const struct memblock_region *reg) |
5b385f25 | 341 | { |
c7fc2de0 | 342 | return PFN_DOWN(reg->base); |
5b385f25 BH |
343 | } |
344 | ||
345 | /** | |
c7fc2de0 | 346 | * memblock_region_reserved_end_pfn - Return the end_pfn this region |
5b385f25 BH |
347 | * @reg: memblock_region structure |
348 | */ | |
c7fc2de0 | 349 | static inline unsigned long memblock_region_reserved_end_pfn(const struct memblock_region *reg) |
5b385f25 | 350 | { |
c7fc2de0 | 351 | return PFN_UP(reg->base + reg->size); |
5b385f25 BH |
352 | } |
353 | ||
354 | #define for_each_memblock(memblock_type, region) \ | |
355 | for (region = memblock.memblock_type.regions; \ | |
356 | region < (memblock.memblock_type.regions + memblock.memblock_type.cnt); \ | |
357 | region++) | |
358 | ||
359 | ||
c378ddd5 | 360 | #ifdef CONFIG_ARCH_DISCARD_MEMBLOCK |
67e24bcb TH |
361 | #define __init_memblock __meminit |
362 | #define __initdata_memblock __meminitdata | |
10d06439 YL |
363 | #else |
364 | #define __init_memblock | |
365 | #define __initdata_memblock | |
366 | #endif | |
367 | ||
95dde501 YL |
368 | #else |
369 | static inline phys_addr_t memblock_alloc(phys_addr_t size, phys_addr_t align) | |
370 | { | |
1f5026a7 | 371 | return 0; |
95dde501 YL |
372 | } |
373 | ||
f0b37fad YL |
374 | #endif /* CONFIG_HAVE_MEMBLOCK */ |
375 | ||
95f72d1e YL |
376 | #endif /* __KERNEL__ */ |
377 | ||
378 | #endif /* _LINUX_MEMBLOCK_H */ |