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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 */ |
bf3d3cc5 | 28 | MEMBLOCK_NOMAP = 0x4, /* don't add to kernel direct mapping */ |
fc6daaf9 | 29 | }; |
66b16edf | 30 | |
e3239ff9 | 31 | struct memblock_region { |
2898cc4c BH |
32 | phys_addr_t base; |
33 | phys_addr_t size; | |
66a20757 | 34 | unsigned long flags; |
7c0caeb8 TH |
35 | #ifdef CONFIG_HAVE_MEMBLOCK_NODE_MAP |
36 | int nid; | |
37 | #endif | |
95f72d1e YL |
38 | }; |
39 | ||
e3239ff9 | 40 | struct memblock_type { |
bf23c51f BH |
41 | unsigned long cnt; /* number of regions */ |
42 | unsigned long max; /* size of the allocated array */ | |
1440c4e2 | 43 | phys_addr_t total_size; /* size of all regions */ |
bf23c51f | 44 | struct memblock_region *regions; |
95f72d1e YL |
45 | }; |
46 | ||
47 | struct memblock { | |
79442ed1 | 48 | bool bottom_up; /* is bottom up direction? */ |
2898cc4c | 49 | phys_addr_t current_limit; |
e3239ff9 BH |
50 | struct memblock_type memory; |
51 | struct memblock_type reserved; | |
70210ed9 PH |
52 | #ifdef CONFIG_HAVE_MEMBLOCK_PHYS_MAP |
53 | struct memblock_type physmem; | |
54 | #endif | |
95f72d1e YL |
55 | }; |
56 | ||
57 | extern struct memblock memblock; | |
5e63cf43 | 58 | extern int memblock_debug; |
55ac590c TC |
59 | #ifdef CONFIG_MOVABLE_NODE |
60 | /* If movable_node boot option specified */ | |
61 | extern bool movable_node_enabled; | |
62 | #endif /* CONFIG_MOVABLE_NODE */ | |
5e63cf43 YL |
63 | |
64 | #define memblock_dbg(fmt, ...) \ | |
65 | if (memblock_debug) printk(KERN_INFO pr_fmt(fmt), ##__VA_ARGS__) | |
95f72d1e | 66 | |
87029ee9 GS |
67 | phys_addr_t memblock_find_in_range_node(phys_addr_t size, phys_addr_t align, |
68 | phys_addr_t start, phys_addr_t end, | |
fc6daaf9 | 69 | int nid, ulong flags); |
fc769a8e TH |
70 | phys_addr_t memblock_find_in_range(phys_addr_t start, phys_addr_t end, |
71 | phys_addr_t size, phys_addr_t align); | |
29f67386 | 72 | phys_addr_t get_allocated_memblock_reserved_regions_info(phys_addr_t *addr); |
5e270e25 | 73 | phys_addr_t get_allocated_memblock_memory_regions_info(phys_addr_t *addr); |
1aadc056 | 74 | void memblock_allow_resize(void); |
7fb0bc3f | 75 | int memblock_add_node(phys_addr_t base, phys_addr_t size, int nid); |
581adcbe TH |
76 | int memblock_add(phys_addr_t base, phys_addr_t size); |
77 | int memblock_remove(phys_addr_t base, phys_addr_t size); | |
78 | int memblock_free(phys_addr_t base, phys_addr_t size); | |
79 | int memblock_reserve(phys_addr_t base, phys_addr_t size); | |
6ede1fd3 | 80 | void memblock_trim_memory(phys_addr_t align); |
95cf82ec TC |
81 | bool memblock_overlaps_region(struct memblock_type *type, |
82 | phys_addr_t base, phys_addr_t size); | |
66b16edf TC |
83 | int memblock_mark_hotplug(phys_addr_t base, phys_addr_t size); |
84 | int memblock_clear_hotplug(phys_addr_t base, phys_addr_t size); | |
a3f5bafc | 85 | int memblock_mark_mirror(phys_addr_t base, phys_addr_t size); |
bf3d3cc5 | 86 | int memblock_mark_nomap(phys_addr_t base, phys_addr_t size); |
a3f5bafc | 87 | ulong choose_memblock_flags(void); |
f1af9d3a PH |
88 | |
89 | /* Low level functions */ | |
90 | int memblock_add_range(struct memblock_type *type, | |
91 | phys_addr_t base, phys_addr_t size, | |
92 | int nid, unsigned long flags); | |
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 | ||
bf3d3cc5 AB |
189 | static inline bool memblock_is_nomap(struct memblock_region *m) |
190 | { | |
191 | return m->flags & MEMBLOCK_NOMAP; | |
192 | } | |
193 | ||
0ee332c1 | 194 | #ifdef CONFIG_HAVE_MEMBLOCK_NODE_MAP |
e76b63f8 YL |
195 | int memblock_search_pfn_nid(unsigned long pfn, unsigned long *start_pfn, |
196 | unsigned long *end_pfn); | |
0ee332c1 TH |
197 | void __next_mem_pfn_range(int *idx, int nid, unsigned long *out_start_pfn, |
198 | unsigned long *out_end_pfn, int *out_nid); | |
199 | ||
200 | /** | |
201 | * for_each_mem_pfn_range - early memory pfn range iterator | |
202 | * @i: an integer used as loop variable | |
203 | * @nid: node selector, %MAX_NUMNODES for all nodes | |
204 | * @p_start: ptr to ulong for start pfn of the range, can be %NULL | |
205 | * @p_end: ptr to ulong for end pfn of the range, can be %NULL | |
206 | * @p_nid: ptr to int for nid of the range, can be %NULL | |
207 | * | |
f2d52fe5 | 208 | * Walks over configured memory ranges. |
0ee332c1 TH |
209 | */ |
210 | #define for_each_mem_pfn_range(i, nid, p_start, p_end, p_nid) \ | |
211 | for (i = -1, __next_mem_pfn_range(&i, nid, p_start, p_end, p_nid); \ | |
212 | i >= 0; __next_mem_pfn_range(&i, nid, p_start, p_end, p_nid)) | |
213 | #endif /* CONFIG_HAVE_MEMBLOCK_NODE_MAP */ | |
214 | ||
35fd0808 TH |
215 | /** |
216 | * for_each_free_mem_range - iterate through free memblock areas | |
217 | * @i: u64 used as loop variable | |
b1154233 | 218 | * @nid: node selector, %NUMA_NO_NODE for all nodes |
35fd0808 TH |
219 | * @p_start: ptr to phys_addr_t for start address of the range, can be %NULL |
220 | * @p_end: ptr to phys_addr_t for end address of the range, can be %NULL | |
221 | * @p_nid: ptr to int for nid of the range, can be %NULL | |
fc6daaf9 | 222 | * @flags: pick from blocks based on memory attributes |
35fd0808 TH |
223 | * |
224 | * Walks over free (memory && !reserved) areas of memblock. Available as | |
225 | * soon as memblock is initialized. | |
226 | */ | |
fc6daaf9 | 227 | #define for_each_free_mem_range(i, nid, flags, p_start, p_end, p_nid) \ |
f1af9d3a | 228 | for_each_mem_range(i, &memblock.memory, &memblock.reserved, \ |
fc6daaf9 | 229 | nid, flags, p_start, p_end, p_nid) |
7bd0b0f0 TH |
230 | |
231 | /** | |
232 | * for_each_free_mem_range_reverse - rev-iterate through free memblock areas | |
233 | * @i: u64 used as loop variable | |
b1154233 | 234 | * @nid: node selector, %NUMA_NO_NODE for all nodes |
7bd0b0f0 TH |
235 | * @p_start: ptr to phys_addr_t for start address of the range, can be %NULL |
236 | * @p_end: ptr to phys_addr_t for end address of the range, can be %NULL | |
237 | * @p_nid: ptr to int for nid of the range, can be %NULL | |
fc6daaf9 | 238 | * @flags: pick from blocks based on memory attributes |
7bd0b0f0 TH |
239 | * |
240 | * Walks over free (memory && !reserved) areas of memblock in reverse | |
241 | * order. Available as soon as memblock is initialized. | |
242 | */ | |
fc6daaf9 TL |
243 | #define for_each_free_mem_range_reverse(i, nid, flags, p_start, p_end, \ |
244 | p_nid) \ | |
f1af9d3a | 245 | for_each_mem_range_rev(i, &memblock.memory, &memblock.reserved, \ |
fc6daaf9 | 246 | nid, flags, p_start, p_end, p_nid) |
7bd0b0f0 | 247 | |
66b16edf TC |
248 | static inline void memblock_set_region_flags(struct memblock_region *r, |
249 | unsigned long flags) | |
250 | { | |
251 | r->flags |= flags; | |
252 | } | |
253 | ||
254 | static inline void memblock_clear_region_flags(struct memblock_region *r, | |
255 | unsigned long flags) | |
256 | { | |
257 | r->flags &= ~flags; | |
258 | } | |
259 | ||
7c0caeb8 | 260 | #ifdef CONFIG_HAVE_MEMBLOCK_NODE_MAP |
e7e8de59 TC |
261 | int memblock_set_node(phys_addr_t base, phys_addr_t size, |
262 | struct memblock_type *type, int nid); | |
7c0caeb8 TH |
263 | |
264 | static inline void memblock_set_region_node(struct memblock_region *r, int nid) | |
265 | { | |
266 | r->nid = nid; | |
267 | } | |
268 | ||
269 | static inline int memblock_get_region_node(const struct memblock_region *r) | |
270 | { | |
271 | return r->nid; | |
272 | } | |
273 | #else | |
274 | static inline void memblock_set_region_node(struct memblock_region *r, int nid) | |
275 | { | |
276 | } | |
277 | ||
278 | static inline int memblock_get_region_node(const struct memblock_region *r) | |
279 | { | |
280 | return 0; | |
281 | } | |
282 | #endif /* CONFIG_HAVE_MEMBLOCK_NODE_MAP */ | |
283 | ||
581adcbe TH |
284 | phys_addr_t memblock_alloc_nid(phys_addr_t size, phys_addr_t align, int nid); |
285 | phys_addr_t memblock_alloc_try_nid(phys_addr_t size, phys_addr_t align, int nid); | |
9d1e2492 | 286 | |
581adcbe | 287 | phys_addr_t memblock_alloc(phys_addr_t size, phys_addr_t align); |
e63075a3 | 288 | |
79442ed1 TC |
289 | #ifdef CONFIG_MOVABLE_NODE |
290 | /* | |
291 | * Set the allocation direction to bottom-up or top-down. | |
292 | */ | |
2cfb3665 | 293 | static inline void __init memblock_set_bottom_up(bool enable) |
79442ed1 TC |
294 | { |
295 | memblock.bottom_up = enable; | |
296 | } | |
297 | ||
298 | /* | |
299 | * Check if the allocation direction is bottom-up or not. | |
300 | * if this is true, that said, memblock will allocate memory | |
301 | * in bottom-up direction. | |
302 | */ | |
303 | static inline bool memblock_bottom_up(void) | |
304 | { | |
305 | return memblock.bottom_up; | |
306 | } | |
307 | #else | |
2cfb3665 | 308 | static inline void __init memblock_set_bottom_up(bool enable) {} |
79442ed1 TC |
309 | static inline bool memblock_bottom_up(void) { return false; } |
310 | #endif | |
311 | ||
e63075a3 | 312 | /* Flags for memblock_alloc_base() amd __memblock_alloc_base() */ |
2898cc4c | 313 | #define MEMBLOCK_ALLOC_ANYWHERE (~(phys_addr_t)0) |
e63075a3 BH |
314 | #define MEMBLOCK_ALLOC_ACCESSIBLE 0 |
315 | ||
2bfc2862 | 316 | phys_addr_t __init memblock_alloc_range(phys_addr_t size, phys_addr_t align, |
fc6daaf9 TL |
317 | phys_addr_t start, phys_addr_t end, |
318 | ulong flags); | |
581adcbe TH |
319 | phys_addr_t memblock_alloc_base(phys_addr_t size, phys_addr_t align, |
320 | phys_addr_t max_addr); | |
321 | phys_addr_t __memblock_alloc_base(phys_addr_t size, phys_addr_t align, | |
322 | phys_addr_t max_addr); | |
323 | phys_addr_t memblock_phys_mem_size(void); | |
595ad9af | 324 | phys_addr_t memblock_mem_size(unsigned long limit_pfn); |
581adcbe TH |
325 | phys_addr_t memblock_start_of_DRAM(void); |
326 | phys_addr_t memblock_end_of_DRAM(void); | |
327 | void memblock_enforce_memory_limit(phys_addr_t memory_limit); | |
b4ad0c7e | 328 | bool memblock_is_memory(phys_addr_t addr); |
bf3d3cc5 | 329 | int memblock_is_map_memory(phys_addr_t addr); |
581adcbe | 330 | int memblock_is_region_memory(phys_addr_t base, phys_addr_t size); |
b4ad0c7e | 331 | bool memblock_is_reserved(phys_addr_t addr); |
c5c5c9d1 | 332 | bool memblock_is_region_reserved(phys_addr_t base, phys_addr_t size); |
581adcbe | 333 | |
4ff7b82f TH |
334 | extern void __memblock_dump_all(void); |
335 | ||
336 | static inline void memblock_dump_all(void) | |
337 | { | |
338 | if (memblock_debug) | |
339 | __memblock_dump_all(); | |
340 | } | |
95f72d1e | 341 | |
e63075a3 BH |
342 | /** |
343 | * memblock_set_current_limit - Set the current allocation limit to allow | |
344 | * limiting allocations to what is currently | |
345 | * accessible during boot | |
346 | * @limit: New limit value (physical address) | |
347 | */ | |
581adcbe | 348 | void memblock_set_current_limit(phys_addr_t limit); |
e63075a3 | 349 | |
35a1f0bd | 350 | |
fec51014 LA |
351 | phys_addr_t memblock_get_current_limit(void); |
352 | ||
5b385f25 BH |
353 | /* |
354 | * pfn conversion functions | |
355 | * | |
356 | * While the memory MEMBLOCKs should always be page aligned, the reserved | |
357 | * MEMBLOCKs may not be. This accessor attempt to provide a very clear | |
358 | * idea of what they return for such non aligned MEMBLOCKs. | |
359 | */ | |
360 | ||
361 | /** | |
c7fc2de0 | 362 | * memblock_region_memory_base_pfn - Return the lowest pfn intersecting with the memory region |
5b385f25 BH |
363 | * @reg: memblock_region structure |
364 | */ | |
c7fc2de0 | 365 | static inline unsigned long memblock_region_memory_base_pfn(const struct memblock_region *reg) |
5b385f25 | 366 | { |
c7fc2de0 | 367 | return PFN_UP(reg->base); |
5b385f25 BH |
368 | } |
369 | ||
370 | /** | |
c7fc2de0 | 371 | * memblock_region_memory_end_pfn - Return the end_pfn this region |
5b385f25 BH |
372 | * @reg: memblock_region structure |
373 | */ | |
c7fc2de0 | 374 | static inline unsigned long memblock_region_memory_end_pfn(const struct memblock_region *reg) |
5b385f25 | 375 | { |
c7fc2de0 | 376 | return PFN_DOWN(reg->base + reg->size); |
5b385f25 BH |
377 | } |
378 | ||
379 | /** | |
c7fc2de0 | 380 | * memblock_region_reserved_base_pfn - Return the lowest pfn intersecting with the reserved region |
5b385f25 BH |
381 | * @reg: memblock_region structure |
382 | */ | |
c7fc2de0 | 383 | static inline unsigned long memblock_region_reserved_base_pfn(const struct memblock_region *reg) |
5b385f25 | 384 | { |
c7fc2de0 | 385 | return PFN_DOWN(reg->base); |
5b385f25 BH |
386 | } |
387 | ||
388 | /** | |
c7fc2de0 | 389 | * memblock_region_reserved_end_pfn - Return the end_pfn this region |
5b385f25 BH |
390 | * @reg: memblock_region structure |
391 | */ | |
c7fc2de0 | 392 | static inline unsigned long memblock_region_reserved_end_pfn(const struct memblock_region *reg) |
5b385f25 | 393 | { |
c7fc2de0 | 394 | return PFN_UP(reg->base + reg->size); |
5b385f25 BH |
395 | } |
396 | ||
397 | #define for_each_memblock(memblock_type, region) \ | |
398 | for (region = memblock.memblock_type.regions; \ | |
399 | region < (memblock.memblock_type.regions + memblock.memblock_type.cnt); \ | |
400 | region++) | |
401 | ||
402 | ||
c378ddd5 | 403 | #ifdef CONFIG_ARCH_DISCARD_MEMBLOCK |
67e24bcb TH |
404 | #define __init_memblock __meminit |
405 | #define __initdata_memblock __meminitdata | |
10d06439 YL |
406 | #else |
407 | #define __init_memblock | |
408 | #define __initdata_memblock | |
409 | #endif | |
410 | ||
4a20799d | 411 | #ifdef CONFIG_MEMTEST |
7f70baee | 412 | extern void early_memtest(phys_addr_t start, phys_addr_t end); |
4a20799d | 413 | #else |
7f70baee | 414 | static inline void early_memtest(phys_addr_t start, phys_addr_t end) |
4a20799d VM |
415 | { |
416 | } | |
417 | #endif | |
418 | ||
95dde501 YL |
419 | #else |
420 | static inline phys_addr_t memblock_alloc(phys_addr_t size, phys_addr_t align) | |
421 | { | |
1f5026a7 | 422 | return 0; |
95dde501 YL |
423 | } |
424 | ||
f0b37fad YL |
425 | #endif /* CONFIG_HAVE_MEMBLOCK */ |
426 | ||
95f72d1e YL |
427 | #endif /* __KERNEL__ */ |
428 | ||
429 | #endif /* _LINUX_MEMBLOCK_H */ |