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Commit | Line | Data |
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09325873 YL |
1 | /* |
2 | * bootmem - A boot-time physical memory allocator and configurator | |
3 | * | |
4 | * Copyright (C) 1999 Ingo Molnar | |
5 | * 1999 Kanoj Sarcar, SGI | |
6 | * 2008 Johannes Weiner | |
7 | * | |
8 | * Access to this subsystem has to be serialized externally (which is true | |
9 | * for the boot process anyway). | |
10 | */ | |
11 | #include <linux/init.h> | |
12 | #include <linux/pfn.h> | |
13 | #include <linux/slab.h> | |
14 | #include <linux/bootmem.h> | |
b95f1b31 | 15 | #include <linux/export.h> |
09325873 YL |
16 | #include <linux/kmemleak.h> |
17 | #include <linux/range.h> | |
18 | #include <linux/memblock.h> | |
19 | ||
20 | #include <asm/bug.h> | |
21 | #include <asm/io.h> | |
22 | #include <asm/processor.h> | |
23 | ||
24 | #include "internal.h" | |
25 | ||
e782ab42 YL |
26 | #ifndef CONFIG_NEED_MULTIPLE_NODES |
27 | struct pglist_data __refdata contig_page_data; | |
28 | EXPORT_SYMBOL(contig_page_data); | |
29 | #endif | |
30 | ||
09325873 YL |
31 | unsigned long max_low_pfn; |
32 | unsigned long min_low_pfn; | |
33 | unsigned long max_pfn; | |
34 | ||
8bc1f91e YL |
35 | static void * __init __alloc_memory_core_early(int nid, u64 size, u64 align, |
36 | u64 goal, u64 limit) | |
37 | { | |
38 | void *ptr; | |
39 | u64 addr; | |
40 | ||
41 | if (limit > memblock.current_limit) | |
42 | limit = memblock.current_limit; | |
43 | ||
eb40c4c2 | 44 | addr = memblock_find_in_range_node(goal, limit, size, align, nid); |
1f5026a7 | 45 | if (!addr) |
8bc1f91e YL |
46 | return NULL; |
47 | ||
b476e295 | 48 | memblock_reserve(addr, size); |
8bc1f91e YL |
49 | ptr = phys_to_virt(addr); |
50 | memset(ptr, 0, size); | |
8bc1f91e YL |
51 | /* |
52 | * The min_count is set to 0 so that bootmem allocated blocks | |
53 | * are never reported as leaks. | |
54 | */ | |
55 | kmemleak_alloc(ptr, size, 0, 0); | |
56 | return ptr; | |
57 | } | |
58 | ||
09325873 YL |
59 | /* |
60 | * free_bootmem_late - free bootmem pages directly to page allocator | |
61 | * @addr: starting address of the range | |
62 | * @size: size of the range in bytes | |
63 | * | |
64 | * This is only useful when the bootmem allocator has already been torn | |
65 | * down, but we are still initializing the system. Pages are given directly | |
66 | * to the page allocator, no bootmem metadata is updated because it is gone. | |
67 | */ | |
68 | void __init free_bootmem_late(unsigned long addr, unsigned long size) | |
69 | { | |
70 | unsigned long cursor, end; | |
71 | ||
72 | kmemleak_free_part(__va(addr), size); | |
73 | ||
74 | cursor = PFN_UP(addr); | |
75 | end = PFN_DOWN(addr + size); | |
76 | ||
77 | for (; cursor < end; cursor++) { | |
78 | __free_pages_bootmem(pfn_to_page(cursor), 0); | |
79 | totalram_pages++; | |
80 | } | |
81 | } | |
82 | ||
83 | static void __init __free_pages_memory(unsigned long start, unsigned long end) | |
84 | { | |
6bc2e853 | 85 | unsigned long i, start_aligned, end_aligned; |
09325873 YL |
86 | int order = ilog2(BITS_PER_LONG); |
87 | ||
88 | start_aligned = (start + (BITS_PER_LONG - 1)) & ~(BITS_PER_LONG - 1); | |
89 | end_aligned = end & ~(BITS_PER_LONG - 1); | |
90 | ||
91 | if (end_aligned <= start_aligned) { | |
92 | for (i = start; i < end; i++) | |
93 | __free_pages_bootmem(pfn_to_page(i), 0); | |
94 | ||
95 | return; | |
96 | } | |
97 | ||
98 | for (i = start; i < start_aligned; i++) | |
99 | __free_pages_bootmem(pfn_to_page(i), 0); | |
100 | ||
101 | for (i = start_aligned; i < end_aligned; i += BITS_PER_LONG) | |
102 | __free_pages_bootmem(pfn_to_page(i), order); | |
103 | ||
104 | for (i = end_aligned; i < end; i++) | |
105 | __free_pages_bootmem(pfn_to_page(i), 0); | |
106 | } | |
107 | ||
29f67386 YL |
108 | static unsigned long __init __free_memory_core(phys_addr_t start, |
109 | phys_addr_t end) | |
110 | { | |
111 | unsigned long start_pfn = PFN_UP(start); | |
112 | unsigned long end_pfn = min_t(unsigned long, | |
113 | PFN_DOWN(end), max_low_pfn); | |
114 | ||
115 | if (start_pfn > end_pfn) | |
116 | return 0; | |
117 | ||
118 | __free_pages_memory(start_pfn, end_pfn); | |
119 | ||
120 | return end_pfn - start_pfn; | |
121 | } | |
122 | ||
b4def350 | 123 | static unsigned long __init free_low_memory_core_early(void) |
09325873 | 124 | { |
09325873 | 125 | unsigned long count = 0; |
29f67386 | 126 | phys_addr_t start, end, size; |
8a9ca34c TH |
127 | u64 i; |
128 | ||
29f67386 YL |
129 | for_each_free_mem_range(i, MAX_NUMNODES, &start, &end, NULL) |
130 | count += __free_memory_core(start, end); | |
131 | ||
132 | /* free range that is used for reserved array if we allocate it */ | |
133 | size = get_allocated_memblock_reserved_regions_info(&start); | |
134 | if (size) | |
135 | count += __free_memory_core(start, start + size); | |
09325873 YL |
136 | |
137 | return count; | |
138 | } | |
139 | ||
7b4b2a0d JL |
140 | static int reset_managed_pages_done __initdata; |
141 | ||
142 | static inline void __init reset_node_managed_pages(pg_data_t *pgdat) | |
9feedc9d JL |
143 | { |
144 | struct zone *z; | |
145 | ||
7b4b2a0d JL |
146 | if (reset_managed_pages_done) |
147 | return; | |
9feedc9d | 148 | for (z = pgdat->node_zones; z < pgdat->node_zones + MAX_NR_ZONES; z++) |
7b4b2a0d JL |
149 | z->managed_pages = 0; |
150 | } | |
151 | ||
152 | void __init reset_all_zones_managed_pages(void) | |
153 | { | |
154 | struct pglist_data *pgdat; | |
155 | ||
156 | for_each_online_pgdat(pgdat) | |
157 | reset_node_managed_pages(pgdat); | |
158 | reset_managed_pages_done = 1; | |
9feedc9d JL |
159 | } |
160 | ||
09325873 YL |
161 | /** |
162 | * free_all_bootmem - release free pages to the buddy allocator | |
163 | * | |
164 | * Returns the number of pages actually released. | |
165 | */ | |
166 | unsigned long __init free_all_bootmem(void) | |
167 | { | |
7b4b2a0d | 168 | reset_all_zones_managed_pages(); |
9feedc9d | 169 | |
09325873 YL |
170 | /* |
171 | * We need to use MAX_NUMNODES instead of NODE_DATA(0)->node_id | |
25985edc | 172 | * because in some case like Node0 doesn't have RAM installed |
09325873 | 173 | * low ram will be on Node1 |
09325873 | 174 | */ |
b4def350 | 175 | return free_low_memory_core_early(); |
09325873 YL |
176 | } |
177 | ||
178 | /** | |
179 | * free_bootmem_node - mark a page range as usable | |
180 | * @pgdat: node the range resides on | |
181 | * @physaddr: starting address of the range | |
182 | * @size: size of the range in bytes | |
183 | * | |
184 | * Partial pages will be considered reserved and left as they are. | |
185 | * | |
186 | * The range must reside completely on the specified node. | |
187 | */ | |
188 | void __init free_bootmem_node(pg_data_t *pgdat, unsigned long physaddr, | |
189 | unsigned long size) | |
190 | { | |
191 | kmemleak_free_part(__va(physaddr), size); | |
24aa0788 | 192 | memblock_free(physaddr, size); |
09325873 YL |
193 | } |
194 | ||
195 | /** | |
196 | * free_bootmem - mark a page range as usable | |
197 | * @addr: starting address of the range | |
198 | * @size: size of the range in bytes | |
199 | * | |
200 | * Partial pages will be considered reserved and left as they are. | |
201 | * | |
202 | * The range must be contiguous but may span node boundaries. | |
203 | */ | |
204 | void __init free_bootmem(unsigned long addr, unsigned long size) | |
205 | { | |
206 | kmemleak_free_part(__va(addr), size); | |
24aa0788 | 207 | memblock_free(addr, size); |
09325873 YL |
208 | } |
209 | ||
210 | static void * __init ___alloc_bootmem_nopanic(unsigned long size, | |
211 | unsigned long align, | |
212 | unsigned long goal, | |
213 | unsigned long limit) | |
214 | { | |
215 | void *ptr; | |
216 | ||
217 | if (WARN_ON_ONCE(slab_is_available())) | |
218 | return kzalloc(size, GFP_NOWAIT); | |
219 | ||
220 | restart: | |
221 | ||
222 | ptr = __alloc_memory_core_early(MAX_NUMNODES, size, align, goal, limit); | |
223 | ||
224 | if (ptr) | |
225 | return ptr; | |
226 | ||
227 | if (goal != 0) { | |
228 | goal = 0; | |
229 | goto restart; | |
230 | } | |
231 | ||
232 | return NULL; | |
233 | } | |
234 | ||
235 | /** | |
236 | * __alloc_bootmem_nopanic - allocate boot memory without panicking | |
237 | * @size: size of the request in bytes | |
238 | * @align: alignment of the region | |
239 | * @goal: preferred starting address of the region | |
240 | * | |
241 | * The goal is dropped if it can not be satisfied and the allocation will | |
242 | * fall back to memory below @goal. | |
243 | * | |
244 | * Allocation may happen on any node in the system. | |
245 | * | |
246 | * Returns NULL on failure. | |
247 | */ | |
248 | void * __init __alloc_bootmem_nopanic(unsigned long size, unsigned long align, | |
249 | unsigned long goal) | |
250 | { | |
251 | unsigned long limit = -1UL; | |
252 | ||
253 | return ___alloc_bootmem_nopanic(size, align, goal, limit); | |
254 | } | |
255 | ||
256 | static void * __init ___alloc_bootmem(unsigned long size, unsigned long align, | |
257 | unsigned long goal, unsigned long limit) | |
258 | { | |
259 | void *mem = ___alloc_bootmem_nopanic(size, align, goal, limit); | |
260 | ||
261 | if (mem) | |
262 | return mem; | |
263 | /* | |
264 | * Whoops, we cannot satisfy the allocation request. | |
265 | */ | |
266 | printk(KERN_ALERT "bootmem alloc of %lu bytes failed!\n", size); | |
267 | panic("Out of memory"); | |
268 | return NULL; | |
269 | } | |
270 | ||
271 | /** | |
272 | * __alloc_bootmem - allocate boot memory | |
273 | * @size: size of the request in bytes | |
274 | * @align: alignment of the region | |
275 | * @goal: preferred starting address of the region | |
276 | * | |
277 | * The goal is dropped if it can not be satisfied and the allocation will | |
278 | * fall back to memory below @goal. | |
279 | * | |
280 | * Allocation may happen on any node in the system. | |
281 | * | |
282 | * The function panics if the request can not be satisfied. | |
283 | */ | |
284 | void * __init __alloc_bootmem(unsigned long size, unsigned long align, | |
285 | unsigned long goal) | |
286 | { | |
287 | unsigned long limit = -1UL; | |
288 | ||
289 | return ___alloc_bootmem(size, align, goal, limit); | |
290 | } | |
291 | ||
99ab7b19 | 292 | void * __init ___alloc_bootmem_node_nopanic(pg_data_t *pgdat, |
ba539868 JW |
293 | unsigned long size, |
294 | unsigned long align, | |
295 | unsigned long goal, | |
296 | unsigned long limit) | |
297 | { | |
298 | void *ptr; | |
299 | ||
300 | again: | |
301 | ptr = __alloc_memory_core_early(pgdat->node_id, size, align, | |
302 | goal, limit); | |
303 | if (ptr) | |
304 | return ptr; | |
305 | ||
306 | ptr = __alloc_memory_core_early(MAX_NUMNODES, size, align, | |
307 | goal, limit); | |
308 | if (ptr) | |
309 | return ptr; | |
310 | ||
311 | if (goal) { | |
312 | goal = 0; | |
313 | goto again; | |
314 | } | |
315 | ||
316 | return NULL; | |
317 | } | |
318 | ||
319 | void * __init __alloc_bootmem_node_nopanic(pg_data_t *pgdat, unsigned long size, | |
320 | unsigned long align, unsigned long goal) | |
321 | { | |
322 | if (WARN_ON_ONCE(slab_is_available())) | |
323 | return kzalloc_node(size, GFP_NOWAIT, pgdat->node_id); | |
324 | ||
325 | return ___alloc_bootmem_node_nopanic(pgdat, size, align, goal, 0); | |
326 | } | |
327 | ||
328 | void * __init ___alloc_bootmem_node(pg_data_t *pgdat, unsigned long size, | |
329 | unsigned long align, unsigned long goal, | |
330 | unsigned long limit) | |
331 | { | |
332 | void *ptr; | |
333 | ||
334 | ptr = ___alloc_bootmem_node_nopanic(pgdat, size, align, goal, limit); | |
335 | if (ptr) | |
336 | return ptr; | |
337 | ||
338 | printk(KERN_ALERT "bootmem alloc of %lu bytes failed!\n", size); | |
339 | panic("Out of memory"); | |
340 | return NULL; | |
341 | } | |
342 | ||
09325873 YL |
343 | /** |
344 | * __alloc_bootmem_node - allocate boot memory from a specific node | |
345 | * @pgdat: node to allocate from | |
346 | * @size: size of the request in bytes | |
347 | * @align: alignment of the region | |
348 | * @goal: preferred starting address of the region | |
349 | * | |
350 | * The goal is dropped if it can not be satisfied and the allocation will | |
351 | * fall back to memory below @goal. | |
352 | * | |
353 | * Allocation may fall back to any node in the system if the specified node | |
354 | * can not hold the requested memory. | |
355 | * | |
356 | * The function panics if the request can not be satisfied. | |
357 | */ | |
358 | void * __init __alloc_bootmem_node(pg_data_t *pgdat, unsigned long size, | |
359 | unsigned long align, unsigned long goal) | |
360 | { | |
09325873 YL |
361 | if (WARN_ON_ONCE(slab_is_available())) |
362 | return kzalloc_node(size, GFP_NOWAIT, pgdat->node_id); | |
363 | ||
ba539868 | 364 | return ___alloc_bootmem_node(pgdat, size, align, goal, 0); |
09325873 YL |
365 | } |
366 | ||
367 | void * __init __alloc_bootmem_node_high(pg_data_t *pgdat, unsigned long size, | |
368 | unsigned long align, unsigned long goal) | |
369 | { | |
09325873 | 370 | return __alloc_bootmem_node(pgdat, size, align, goal); |
09325873 YL |
371 | } |
372 | ||
09325873 YL |
373 | #ifndef ARCH_LOW_ADDRESS_LIMIT |
374 | #define ARCH_LOW_ADDRESS_LIMIT 0xffffffffUL | |
375 | #endif | |
376 | ||
377 | /** | |
378 | * __alloc_bootmem_low - allocate low boot memory | |
379 | * @size: size of the request in bytes | |
380 | * @align: alignment of the region | |
381 | * @goal: preferred starting address of the region | |
382 | * | |
383 | * The goal is dropped if it can not be satisfied and the allocation will | |
384 | * fall back to memory below @goal. | |
385 | * | |
386 | * Allocation may happen on any node in the system. | |
387 | * | |
388 | * The function panics if the request can not be satisfied. | |
389 | */ | |
390 | void * __init __alloc_bootmem_low(unsigned long size, unsigned long align, | |
391 | unsigned long goal) | |
392 | { | |
393 | return ___alloc_bootmem(size, align, goal, ARCH_LOW_ADDRESS_LIMIT); | |
394 | } | |
395 | ||
38fa4175 YL |
396 | void * __init __alloc_bootmem_low_nopanic(unsigned long size, |
397 | unsigned long align, | |
398 | unsigned long goal) | |
399 | { | |
400 | return ___alloc_bootmem_nopanic(size, align, goal, | |
401 | ARCH_LOW_ADDRESS_LIMIT); | |
402 | } | |
403 | ||
09325873 YL |
404 | /** |
405 | * __alloc_bootmem_low_node - allocate low boot memory from a specific node | |
406 | * @pgdat: node to allocate from | |
407 | * @size: size of the request in bytes | |
408 | * @align: alignment of the region | |
409 | * @goal: preferred starting address of the region | |
410 | * | |
411 | * The goal is dropped if it can not be satisfied and the allocation will | |
412 | * fall back to memory below @goal. | |
413 | * | |
414 | * Allocation may fall back to any node in the system if the specified node | |
415 | * can not hold the requested memory. | |
416 | * | |
417 | * The function panics if the request can not be satisfied. | |
418 | */ | |
419 | void * __init __alloc_bootmem_low_node(pg_data_t *pgdat, unsigned long size, | |
420 | unsigned long align, unsigned long goal) | |
421 | { | |
09325873 YL |
422 | if (WARN_ON_ONCE(slab_is_available())) |
423 | return kzalloc_node(size, GFP_NOWAIT, pgdat->node_id); | |
424 | ||
ba539868 JW |
425 | return ___alloc_bootmem_node(pgdat, size, align, goal, |
426 | ARCH_LOW_ADDRESS_LIMIT); | |
09325873 | 427 | } |