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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 | 23 | /* Definition of memblock flags. */ |
fc6daaf9 TL |
24 | enum { |
25 | MEMBLOCK_NONE = 0x0, /* No special request */ | |
26 | MEMBLOCK_HOTPLUG = 0x1, /* hotpluggable region */ | |
a3f5bafc | 27 | MEMBLOCK_MIRROR = 0x2, /* mirrored region */ |
fc6daaf9 | 28 | }; |
66b16edf | 29 | |
e3239ff9 | 30 | struct memblock_region { |
2898cc4c BH |
31 | phys_addr_t base; |
32 | phys_addr_t size; | |
66a20757 | 33 | unsigned long flags; |
7c0caeb8 TH |
34 | #ifdef CONFIG_HAVE_MEMBLOCK_NODE_MAP |
35 | int nid; | |
36 | #endif | |
95f72d1e YL |
37 | }; |
38 | ||
e3239ff9 | 39 | struct memblock_type { |
bf23c51f BH |
40 | unsigned long cnt; /* number of regions */ |
41 | unsigned long max; /* size of the allocated array */ | |
1440c4e2 | 42 | phys_addr_t total_size; /* size of all regions */ |
bf23c51f | 43 | struct memblock_region *regions; |
95f72d1e YL |
44 | }; |
45 | ||
46 | struct memblock { | |
79442ed1 | 47 | bool bottom_up; /* is bottom up direction? */ |
2898cc4c | 48 | phys_addr_t current_limit; |
e3239ff9 BH |
49 | struct memblock_type memory; |
50 | struct memblock_type reserved; | |
70210ed9 PH |
51 | #ifdef CONFIG_HAVE_MEMBLOCK_PHYS_MAP |
52 | struct memblock_type physmem; | |
53 | #endif | |
95f72d1e YL |
54 | }; |
55 | ||
56 | extern struct memblock memblock; | |
5e63cf43 | 57 | extern int memblock_debug; |
55ac590c TC |
58 | #ifdef CONFIG_MOVABLE_NODE |
59 | /* If movable_node boot option specified */ | |
60 | extern bool movable_node_enabled; | |
61 | #endif /* CONFIG_MOVABLE_NODE */ | |
5e63cf43 YL |
62 | |
63 | #define memblock_dbg(fmt, ...) \ | |
64 | if (memblock_debug) printk(KERN_INFO pr_fmt(fmt), ##__VA_ARGS__) | |
95f72d1e | 65 | |
87029ee9 GS |
66 | phys_addr_t memblock_find_in_range_node(phys_addr_t size, phys_addr_t align, |
67 | phys_addr_t start, phys_addr_t end, | |
fc6daaf9 | 68 | int nid, ulong flags); |
fc769a8e TH |
69 | phys_addr_t memblock_find_in_range(phys_addr_t start, phys_addr_t end, |
70 | phys_addr_t size, phys_addr_t align); | |
29f67386 | 71 | phys_addr_t get_allocated_memblock_reserved_regions_info(phys_addr_t *addr); |
5e270e25 | 72 | phys_addr_t get_allocated_memblock_memory_regions_info(phys_addr_t *addr); |
1aadc056 | 73 | void memblock_allow_resize(void); |
7fb0bc3f | 74 | int memblock_add_node(phys_addr_t base, phys_addr_t size, int nid); |
581adcbe TH |
75 | int memblock_add(phys_addr_t base, phys_addr_t size); |
76 | int memblock_remove(phys_addr_t base, phys_addr_t size); | |
77 | int memblock_free(phys_addr_t base, phys_addr_t size); | |
78 | int memblock_reserve(phys_addr_t base, phys_addr_t size); | |
6ede1fd3 | 79 | void memblock_trim_memory(phys_addr_t align); |
66b16edf TC |
80 | int memblock_mark_hotplug(phys_addr_t base, phys_addr_t size); |
81 | int memblock_clear_hotplug(phys_addr_t base, phys_addr_t size); | |
a3f5bafc TL |
82 | int memblock_mark_mirror(phys_addr_t base, phys_addr_t size); |
83 | ulong choose_memblock_flags(void); | |
f1af9d3a PH |
84 | |
85 | /* Low level functions */ | |
86 | int memblock_add_range(struct memblock_type *type, | |
87 | phys_addr_t base, phys_addr_t size, | |
88 | int nid, unsigned long flags); | |
89 | ||
90 | int memblock_remove_range(struct memblock_type *type, | |
91 | phys_addr_t base, | |
92 | phys_addr_t size); | |
93 | ||
fc6daaf9 TL |
94 | void __next_mem_range(u64 *idx, int nid, ulong flags, |
95 | struct memblock_type *type_a, | |
f1af9d3a PH |
96 | struct memblock_type *type_b, phys_addr_t *out_start, |
97 | phys_addr_t *out_end, int *out_nid); | |
98 | ||
fc6daaf9 TL |
99 | void __next_mem_range_rev(u64 *idx, int nid, ulong flags, |
100 | struct memblock_type *type_a, | |
f1af9d3a PH |
101 | struct memblock_type *type_b, phys_addr_t *out_start, |
102 | phys_addr_t *out_end, int *out_nid); | |
103 | ||
8e7a7f86 RH |
104 | void __next_reserved_mem_region(u64 *idx, phys_addr_t *out_start, |
105 | phys_addr_t *out_end); | |
106 | ||
f1af9d3a PH |
107 | /** |
108 | * for_each_mem_range - iterate through memblock areas from type_a and not | |
109 | * included in type_b. Or just type_a if type_b is NULL. | |
110 | * @i: u64 used as loop variable | |
111 | * @type_a: ptr to memblock_type to iterate | |
112 | * @type_b: ptr to memblock_type which excludes from the iteration | |
113 | * @nid: node selector, %NUMA_NO_NODE for all nodes | |
fc6daaf9 | 114 | * @flags: pick from blocks based on memory attributes |
f1af9d3a PH |
115 | * @p_start: ptr to phys_addr_t for start address of the range, can be %NULL |
116 | * @p_end: ptr to phys_addr_t for end address of the range, can be %NULL | |
117 | * @p_nid: ptr to int for nid of the range, can be %NULL | |
118 | */ | |
fc6daaf9 | 119 | #define for_each_mem_range(i, type_a, type_b, nid, flags, \ |
f1af9d3a | 120 | p_start, p_end, p_nid) \ |
fc6daaf9 | 121 | for (i = 0, __next_mem_range(&i, nid, flags, type_a, type_b, \ |
f1af9d3a PH |
122 | p_start, p_end, p_nid); \ |
123 | i != (u64)ULLONG_MAX; \ | |
fc6daaf9 | 124 | __next_mem_range(&i, nid, flags, type_a, type_b, \ |
f1af9d3a PH |
125 | p_start, p_end, p_nid)) |
126 | ||
127 | /** | |
128 | * for_each_mem_range_rev - reverse iterate through memblock areas from | |
129 | * type_a and not included in type_b. Or just type_a if type_b is NULL. | |
130 | * @i: u64 used as loop variable | |
131 | * @type_a: ptr to memblock_type to iterate | |
132 | * @type_b: ptr to memblock_type which excludes from the iteration | |
133 | * @nid: node selector, %NUMA_NO_NODE for all nodes | |
fc6daaf9 | 134 | * @flags: pick from blocks based on memory attributes |
f1af9d3a PH |
135 | * @p_start: ptr to phys_addr_t for start address of the range, can be %NULL |
136 | * @p_end: ptr to phys_addr_t for end address of the range, can be %NULL | |
137 | * @p_nid: ptr to int for nid of the range, can be %NULL | |
138 | */ | |
fc6daaf9 | 139 | #define for_each_mem_range_rev(i, type_a, type_b, nid, flags, \ |
f1af9d3a PH |
140 | p_start, p_end, p_nid) \ |
141 | for (i = (u64)ULLONG_MAX, \ | |
fc6daaf9 | 142 | __next_mem_range_rev(&i, nid, flags, type_a, type_b,\ |
f1af9d3a PH |
143 | p_start, p_end, p_nid); \ |
144 | i != (u64)ULLONG_MAX; \ | |
fc6daaf9 | 145 | __next_mem_range_rev(&i, nid, flags, type_a, type_b, \ |
f1af9d3a PH |
146 | p_start, p_end, p_nid)) |
147 | ||
8e7a7f86 RH |
148 | /** |
149 | * for_each_reserved_mem_region - iterate over all reserved memblock areas | |
150 | * @i: u64 used as loop variable | |
151 | * @p_start: ptr to phys_addr_t for start address of the range, can be %NULL | |
152 | * @p_end: ptr to phys_addr_t for end address of the range, can be %NULL | |
153 | * | |
154 | * Walks over reserved areas of memblock. Available as soon as memblock | |
155 | * is initialized. | |
156 | */ | |
157 | #define for_each_reserved_mem_region(i, p_start, p_end) \ | |
158 | for (i = 0UL, \ | |
159 | __next_reserved_mem_region(&i, p_start, p_end); \ | |
160 | i != (u64)ULLONG_MAX; \ | |
161 | __next_reserved_mem_region(&i, p_start, p_end)) | |
162 | ||
55ac590c TC |
163 | #ifdef CONFIG_MOVABLE_NODE |
164 | static inline bool memblock_is_hotpluggable(struct memblock_region *m) | |
165 | { | |
166 | return m->flags & MEMBLOCK_HOTPLUG; | |
167 | } | |
168 | ||
169 | static inline bool movable_node_is_enabled(void) | |
170 | { | |
171 | return movable_node_enabled; | |
172 | } | |
173 | #else | |
174 | static inline bool memblock_is_hotpluggable(struct memblock_region *m) | |
175 | { | |
176 | return false; | |
177 | } | |
178 | static inline bool movable_node_is_enabled(void) | |
179 | { | |
180 | return false; | |
181 | } | |
182 | #endif | |
e63075a3 | 183 | |
a3f5bafc TL |
184 | static inline bool memblock_is_mirror(struct memblock_region *m) |
185 | { | |
186 | return m->flags & MEMBLOCK_MIRROR; | |
187 | } | |
188 | ||
0ee332c1 | 189 | #ifdef CONFIG_HAVE_MEMBLOCK_NODE_MAP |
e76b63f8 YL |
190 | int memblock_search_pfn_nid(unsigned long pfn, unsigned long *start_pfn, |
191 | unsigned long *end_pfn); | |
0ee332c1 TH |
192 | void __next_mem_pfn_range(int *idx, int nid, unsigned long *out_start_pfn, |
193 | unsigned long *out_end_pfn, int *out_nid); | |
194 | ||
195 | /** | |
196 | * for_each_mem_pfn_range - early memory pfn range iterator | |
197 | * @i: an integer used as loop variable | |
198 | * @nid: node selector, %MAX_NUMNODES for all nodes | |
199 | * @p_start: ptr to ulong for start pfn of the range, can be %NULL | |
200 | * @p_end: ptr to ulong for end pfn of the range, can be %NULL | |
201 | * @p_nid: ptr to int for nid of the range, can be %NULL | |
202 | * | |
f2d52fe5 | 203 | * Walks over configured memory ranges. |
0ee332c1 TH |
204 | */ |
205 | #define for_each_mem_pfn_range(i, nid, p_start, p_end, p_nid) \ | |
206 | for (i = -1, __next_mem_pfn_range(&i, nid, p_start, p_end, p_nid); \ | |
207 | i >= 0; __next_mem_pfn_range(&i, nid, p_start, p_end, p_nid)) | |
208 | #endif /* CONFIG_HAVE_MEMBLOCK_NODE_MAP */ | |
209 | ||
35fd0808 TH |
210 | /** |
211 | * for_each_free_mem_range - iterate through free memblock areas | |
212 | * @i: u64 used as loop variable | |
b1154233 | 213 | * @nid: node selector, %NUMA_NO_NODE for all nodes |
35fd0808 TH |
214 | * @p_start: ptr to phys_addr_t for start address of the range, can be %NULL |
215 | * @p_end: ptr to phys_addr_t for end address of the range, can be %NULL | |
216 | * @p_nid: ptr to int for nid of the range, can be %NULL | |
fc6daaf9 | 217 | * @flags: pick from blocks based on memory attributes |
35fd0808 TH |
218 | * |
219 | * Walks over free (memory && !reserved) areas of memblock. Available as | |
220 | * soon as memblock is initialized. | |
221 | */ | |
fc6daaf9 | 222 | #define for_each_free_mem_range(i, nid, flags, p_start, p_end, p_nid) \ |
f1af9d3a | 223 | for_each_mem_range(i, &memblock.memory, &memblock.reserved, \ |
fc6daaf9 | 224 | nid, flags, p_start, p_end, p_nid) |
7bd0b0f0 TH |
225 | |
226 | /** | |
227 | * for_each_free_mem_range_reverse - rev-iterate through free memblock areas | |
228 | * @i: u64 used as loop variable | |
b1154233 | 229 | * @nid: node selector, %NUMA_NO_NODE for all nodes |
7bd0b0f0 TH |
230 | * @p_start: ptr to phys_addr_t for start address of the range, can be %NULL |
231 | * @p_end: ptr to phys_addr_t for end address of the range, can be %NULL | |
232 | * @p_nid: ptr to int for nid of the range, can be %NULL | |
fc6daaf9 | 233 | * @flags: pick from blocks based on memory attributes |
7bd0b0f0 TH |
234 | * |
235 | * Walks over free (memory && !reserved) areas of memblock in reverse | |
236 | * order. Available as soon as memblock is initialized. | |
237 | */ | |
fc6daaf9 TL |
238 | #define for_each_free_mem_range_reverse(i, nid, flags, p_start, p_end, \ |
239 | p_nid) \ | |
f1af9d3a | 240 | for_each_mem_range_rev(i, &memblock.memory, &memblock.reserved, \ |
fc6daaf9 | 241 | nid, flags, p_start, p_end, p_nid) |
7bd0b0f0 | 242 | |
66b16edf TC |
243 | static inline void memblock_set_region_flags(struct memblock_region *r, |
244 | unsigned long flags) | |
245 | { | |
246 | r->flags |= flags; | |
247 | } | |
248 | ||
249 | static inline void memblock_clear_region_flags(struct memblock_region *r, | |
250 | unsigned long flags) | |
251 | { | |
252 | r->flags &= ~flags; | |
253 | } | |
254 | ||
7c0caeb8 | 255 | #ifdef CONFIG_HAVE_MEMBLOCK_NODE_MAP |
e7e8de59 TC |
256 | int memblock_set_node(phys_addr_t base, phys_addr_t size, |
257 | struct memblock_type *type, int nid); | |
7c0caeb8 TH |
258 | |
259 | static inline void memblock_set_region_node(struct memblock_region *r, int nid) | |
260 | { | |
261 | r->nid = nid; | |
262 | } | |
263 | ||
264 | static inline int memblock_get_region_node(const struct memblock_region *r) | |
265 | { | |
266 | return r->nid; | |
267 | } | |
268 | #else | |
269 | static inline void memblock_set_region_node(struct memblock_region *r, int nid) | |
270 | { | |
271 | } | |
272 | ||
273 | static inline int memblock_get_region_node(const struct memblock_region *r) | |
274 | { | |
275 | return 0; | |
276 | } | |
277 | #endif /* CONFIG_HAVE_MEMBLOCK_NODE_MAP */ | |
278 | ||
581adcbe TH |
279 | phys_addr_t memblock_alloc_nid(phys_addr_t size, phys_addr_t align, int nid); |
280 | phys_addr_t memblock_alloc_try_nid(phys_addr_t size, phys_addr_t align, int nid); | |
9d1e2492 | 281 | |
581adcbe | 282 | phys_addr_t memblock_alloc(phys_addr_t size, phys_addr_t align); |
e63075a3 | 283 | |
79442ed1 TC |
284 | #ifdef CONFIG_MOVABLE_NODE |
285 | /* | |
286 | * Set the allocation direction to bottom-up or top-down. | |
287 | */ | |
2cfb3665 | 288 | static inline void __init memblock_set_bottom_up(bool enable) |
79442ed1 TC |
289 | { |
290 | memblock.bottom_up = enable; | |
291 | } | |
292 | ||
293 | /* | |
294 | * Check if the allocation direction is bottom-up or not. | |
295 | * if this is true, that said, memblock will allocate memory | |
296 | * in bottom-up direction. | |
297 | */ | |
298 | static inline bool memblock_bottom_up(void) | |
299 | { | |
300 | return memblock.bottom_up; | |
301 | } | |
302 | #else | |
2cfb3665 | 303 | static inline void __init memblock_set_bottom_up(bool enable) {} |
79442ed1 TC |
304 | static inline bool memblock_bottom_up(void) { return false; } |
305 | #endif | |
306 | ||
e63075a3 | 307 | /* Flags for memblock_alloc_base() amd __memblock_alloc_base() */ |
2898cc4c | 308 | #define MEMBLOCK_ALLOC_ANYWHERE (~(phys_addr_t)0) |
e63075a3 BH |
309 | #define MEMBLOCK_ALLOC_ACCESSIBLE 0 |
310 | ||
2bfc2862 | 311 | phys_addr_t __init memblock_alloc_range(phys_addr_t size, phys_addr_t align, |
fc6daaf9 TL |
312 | phys_addr_t start, phys_addr_t end, |
313 | ulong flags); | |
581adcbe TH |
314 | phys_addr_t memblock_alloc_base(phys_addr_t size, phys_addr_t align, |
315 | phys_addr_t max_addr); | |
316 | phys_addr_t __memblock_alloc_base(phys_addr_t size, phys_addr_t align, | |
317 | phys_addr_t max_addr); | |
318 | phys_addr_t memblock_phys_mem_size(void); | |
595ad9af | 319 | phys_addr_t memblock_mem_size(unsigned long limit_pfn); |
581adcbe TH |
320 | phys_addr_t memblock_start_of_DRAM(void); |
321 | phys_addr_t memblock_end_of_DRAM(void); | |
322 | void memblock_enforce_memory_limit(phys_addr_t memory_limit); | |
323 | int memblock_is_memory(phys_addr_t addr); | |
324 | int memblock_is_region_memory(phys_addr_t base, phys_addr_t size); | |
325 | int memblock_is_reserved(phys_addr_t addr); | |
326 | int memblock_is_region_reserved(phys_addr_t base, phys_addr_t size); | |
327 | ||
4ff7b82f TH |
328 | extern void __memblock_dump_all(void); |
329 | ||
330 | static inline void memblock_dump_all(void) | |
331 | { | |
332 | if (memblock_debug) | |
333 | __memblock_dump_all(); | |
334 | } | |
95f72d1e | 335 | |
e63075a3 BH |
336 | /** |
337 | * memblock_set_current_limit - Set the current allocation limit to allow | |
338 | * limiting allocations to what is currently | |
339 | * accessible during boot | |
340 | * @limit: New limit value (physical address) | |
341 | */ | |
581adcbe | 342 | void memblock_set_current_limit(phys_addr_t limit); |
e63075a3 | 343 | |
35a1f0bd | 344 | |
fec51014 LA |
345 | phys_addr_t memblock_get_current_limit(void); |
346 | ||
5b385f25 BH |
347 | /* |
348 | * pfn conversion functions | |
349 | * | |
350 | * While the memory MEMBLOCKs should always be page aligned, the reserved | |
351 | * MEMBLOCKs may not be. This accessor attempt to provide a very clear | |
352 | * idea of what they return for such non aligned MEMBLOCKs. | |
353 | */ | |
354 | ||
355 | /** | |
c7fc2de0 | 356 | * memblock_region_memory_base_pfn - Return the lowest pfn intersecting with the memory region |
5b385f25 BH |
357 | * @reg: memblock_region structure |
358 | */ | |
c7fc2de0 | 359 | static inline unsigned long memblock_region_memory_base_pfn(const struct memblock_region *reg) |
5b385f25 | 360 | { |
c7fc2de0 | 361 | return PFN_UP(reg->base); |
5b385f25 BH |
362 | } |
363 | ||
364 | /** | |
c7fc2de0 | 365 | * memblock_region_memory_end_pfn - Return the end_pfn this region |
5b385f25 BH |
366 | * @reg: memblock_region structure |
367 | */ | |
c7fc2de0 | 368 | static inline unsigned long memblock_region_memory_end_pfn(const struct memblock_region *reg) |
5b385f25 | 369 | { |
c7fc2de0 | 370 | return PFN_DOWN(reg->base + reg->size); |
5b385f25 BH |
371 | } |
372 | ||
373 | /** | |
c7fc2de0 | 374 | * memblock_region_reserved_base_pfn - Return the lowest pfn intersecting with the reserved region |
5b385f25 BH |
375 | * @reg: memblock_region structure |
376 | */ | |
c7fc2de0 | 377 | static inline unsigned long memblock_region_reserved_base_pfn(const struct memblock_region *reg) |
5b385f25 | 378 | { |
c7fc2de0 | 379 | return PFN_DOWN(reg->base); |
5b385f25 BH |
380 | } |
381 | ||
382 | /** | |
c7fc2de0 | 383 | * memblock_region_reserved_end_pfn - Return the end_pfn this region |
5b385f25 BH |
384 | * @reg: memblock_region structure |
385 | */ | |
c7fc2de0 | 386 | static inline unsigned long memblock_region_reserved_end_pfn(const struct memblock_region *reg) |
5b385f25 | 387 | { |
c7fc2de0 | 388 | return PFN_UP(reg->base + reg->size); |
5b385f25 BH |
389 | } |
390 | ||
391 | #define for_each_memblock(memblock_type, region) \ | |
392 | for (region = memblock.memblock_type.regions; \ | |
393 | region < (memblock.memblock_type.regions + memblock.memblock_type.cnt); \ | |
394 | region++) | |
395 | ||
396 | ||
c378ddd5 | 397 | #ifdef CONFIG_ARCH_DISCARD_MEMBLOCK |
67e24bcb TH |
398 | #define __init_memblock __meminit |
399 | #define __initdata_memblock __meminitdata | |
10d06439 YL |
400 | #else |
401 | #define __init_memblock | |
402 | #define __initdata_memblock | |
403 | #endif | |
404 | ||
4a20799d | 405 | #ifdef CONFIG_MEMTEST |
7f70baee | 406 | extern void early_memtest(phys_addr_t start, phys_addr_t end); |
4a20799d | 407 | #else |
7f70baee | 408 | static inline void early_memtest(phys_addr_t start, phys_addr_t end) |
4a20799d VM |
409 | { |
410 | } | |
411 | #endif | |
412 | ||
95dde501 YL |
413 | #else |
414 | static inline phys_addr_t memblock_alloc(phys_addr_t size, phys_addr_t align) | |
415 | { | |
1f5026a7 | 416 | return 0; |
95dde501 YL |
417 | } |
418 | ||
f0b37fad YL |
419 | #endif /* CONFIG_HAVE_MEMBLOCK */ |
420 | ||
95f72d1e YL |
421 | #endif /* __KERNEL__ */ |
422 | ||
423 | #endif /* _LINUX_MEMBLOCK_H */ |