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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 | ||
87029ee9 | 44 | addr = memblock_find_in_range_node(size, align, goal, limit, nid); |
1f5026a7 | 45 | if (!addr) |
8bc1f91e YL |
46 | return NULL; |
47 | ||
87379ec8 PH |
48 | if (memblock_reserve(addr, size)) |
49 | return NULL; | |
50 | ||
8bc1f91e YL |
51 | ptr = phys_to_virt(addr); |
52 | memset(ptr, 0, size); | |
8bc1f91e YL |
53 | /* |
54 | * The min_count is set to 0 so that bootmem allocated blocks | |
55 | * are never reported as leaks. | |
56 | */ | |
57 | kmemleak_alloc(ptr, size, 0, 0); | |
58 | return ptr; | |
59 | } | |
60 | ||
09325873 YL |
61 | /* |
62 | * free_bootmem_late - free bootmem pages directly to page allocator | |
63 | * @addr: starting address of the range | |
64 | * @size: size of the range in bytes | |
65 | * | |
66 | * This is only useful when the bootmem allocator has already been torn | |
67 | * down, but we are still initializing the system. Pages are given directly | |
68 | * to the page allocator, no bootmem metadata is updated because it is gone. | |
69 | */ | |
70 | void __init free_bootmem_late(unsigned long addr, unsigned long size) | |
71 | { | |
72 | unsigned long cursor, end; | |
73 | ||
74 | kmemleak_free_part(__va(addr), size); | |
75 | ||
76 | cursor = PFN_UP(addr); | |
77 | end = PFN_DOWN(addr + size); | |
78 | ||
79 | for (; cursor < end; cursor++) { | |
80 | __free_pages_bootmem(pfn_to_page(cursor), 0); | |
81 | totalram_pages++; | |
82 | } | |
83 | } | |
84 | ||
85 | static void __init __free_pages_memory(unsigned long start, unsigned long end) | |
86 | { | |
309d0b39 | 87 | int order; |
09325873 | 88 | |
309d0b39 RH |
89 | while (start < end) { |
90 | order = min(MAX_ORDER - 1UL, __ffs(start)); | |
09325873 | 91 | |
309d0b39 RH |
92 | while (start + (1UL << order) > end) |
93 | order--; | |
09325873 | 94 | |
309d0b39 | 95 | __free_pages_bootmem(pfn_to_page(start), order); |
09325873 | 96 | |
309d0b39 RH |
97 | start += (1UL << order); |
98 | } | |
09325873 YL |
99 | } |
100 | ||
29f67386 YL |
101 | static unsigned long __init __free_memory_core(phys_addr_t start, |
102 | phys_addr_t end) | |
103 | { | |
104 | unsigned long start_pfn = PFN_UP(start); | |
105 | unsigned long end_pfn = min_t(unsigned long, | |
106 | PFN_DOWN(end), max_low_pfn); | |
107 | ||
108 | if (start_pfn > end_pfn) | |
109 | return 0; | |
110 | ||
111 | __free_pages_memory(start_pfn, end_pfn); | |
112 | ||
113 | return end_pfn - start_pfn; | |
114 | } | |
115 | ||
b4def350 | 116 | static unsigned long __init free_low_memory_core_early(void) |
09325873 | 117 | { |
09325873 | 118 | unsigned long count = 0; |
354f17e1 | 119 | phys_addr_t start, end; |
8a9ca34c TH |
120 | u64 i; |
121 | ||
b1154233 | 122 | for_each_free_mem_range(i, NUMA_NO_NODE, &start, &end, NULL) |
29f67386 YL |
123 | count += __free_memory_core(start, end); |
124 | ||
5e270e25 | 125 | #ifdef CONFIG_ARCH_DISCARD_MEMBLOCK |
354f17e1 PH |
126 | { |
127 | phys_addr_t size; | |
128 | ||
129 | /* Free memblock.reserved array if it was allocated */ | |
130 | size = get_allocated_memblock_reserved_regions_info(&start); | |
131 | if (size) | |
132 | count += __free_memory_core(start, start + size); | |
133 | ||
134 | /* Free memblock.memory array if it was allocated */ | |
135 | size = get_allocated_memblock_memory_regions_info(&start); | |
136 | if (size) | |
137 | count += __free_memory_core(start, start + size); | |
138 | } | |
5e270e25 PH |
139 | #endif |
140 | ||
09325873 YL |
141 | return count; |
142 | } | |
143 | ||
7b4b2a0d JL |
144 | static int reset_managed_pages_done __initdata; |
145 | ||
146 | static inline void __init reset_node_managed_pages(pg_data_t *pgdat) | |
9feedc9d JL |
147 | { |
148 | struct zone *z; | |
149 | ||
7b4b2a0d JL |
150 | if (reset_managed_pages_done) |
151 | return; | |
9feedc9d | 152 | for (z = pgdat->node_zones; z < pgdat->node_zones + MAX_NR_ZONES; z++) |
7b4b2a0d JL |
153 | z->managed_pages = 0; |
154 | } | |
155 | ||
156 | void __init reset_all_zones_managed_pages(void) | |
157 | { | |
158 | struct pglist_data *pgdat; | |
159 | ||
160 | for_each_online_pgdat(pgdat) | |
161 | reset_node_managed_pages(pgdat); | |
162 | reset_managed_pages_done = 1; | |
9feedc9d JL |
163 | } |
164 | ||
09325873 YL |
165 | /** |
166 | * free_all_bootmem - release free pages to the buddy allocator | |
167 | * | |
168 | * Returns the number of pages actually released. | |
169 | */ | |
170 | unsigned long __init free_all_bootmem(void) | |
171 | { | |
0c988534 JL |
172 | unsigned long pages; |
173 | ||
7b4b2a0d | 174 | reset_all_zones_managed_pages(); |
9feedc9d | 175 | |
09325873 | 176 | /* |
b1154233 | 177 | * We need to use NUMA_NO_NODE instead of NODE_DATA(0)->node_id |
25985edc | 178 | * because in some case like Node0 doesn't have RAM installed |
09325873 | 179 | * low ram will be on Node1 |
09325873 | 180 | */ |
0c988534 JL |
181 | pages = free_low_memory_core_early(); |
182 | totalram_pages += pages; | |
183 | ||
184 | return pages; | |
09325873 YL |
185 | } |
186 | ||
187 | /** | |
188 | * free_bootmem_node - mark a page range as usable | |
189 | * @pgdat: node the range resides on | |
190 | * @physaddr: starting address of the range | |
191 | * @size: size of the range in bytes | |
192 | * | |
193 | * Partial pages will be considered reserved and left as they are. | |
194 | * | |
195 | * The range must reside completely on the specified node. | |
196 | */ | |
197 | void __init free_bootmem_node(pg_data_t *pgdat, unsigned long physaddr, | |
198 | unsigned long size) | |
199 | { | |
200 | kmemleak_free_part(__va(physaddr), size); | |
24aa0788 | 201 | memblock_free(physaddr, size); |
09325873 YL |
202 | } |
203 | ||
204 | /** | |
205 | * free_bootmem - mark a page range as usable | |
206 | * @addr: starting address of the range | |
207 | * @size: size of the range in bytes | |
208 | * | |
209 | * Partial pages will be considered reserved and left as they are. | |
210 | * | |
211 | * The range must be contiguous but may span node boundaries. | |
212 | */ | |
213 | void __init free_bootmem(unsigned long addr, unsigned long size) | |
214 | { | |
215 | kmemleak_free_part(__va(addr), size); | |
24aa0788 | 216 | memblock_free(addr, size); |
09325873 YL |
217 | } |
218 | ||
219 | static void * __init ___alloc_bootmem_nopanic(unsigned long size, | |
220 | unsigned long align, | |
221 | unsigned long goal, | |
222 | unsigned long limit) | |
223 | { | |
224 | void *ptr; | |
225 | ||
226 | if (WARN_ON_ONCE(slab_is_available())) | |
227 | return kzalloc(size, GFP_NOWAIT); | |
228 | ||
229 | restart: | |
230 | ||
b1154233 | 231 | ptr = __alloc_memory_core_early(NUMA_NO_NODE, size, align, goal, limit); |
09325873 YL |
232 | |
233 | if (ptr) | |
234 | return ptr; | |
235 | ||
236 | if (goal != 0) { | |
237 | goal = 0; | |
238 | goto restart; | |
239 | } | |
240 | ||
241 | return NULL; | |
242 | } | |
243 | ||
244 | /** | |
245 | * __alloc_bootmem_nopanic - allocate boot memory without panicking | |
246 | * @size: size of the request in bytes | |
247 | * @align: alignment of the region | |
248 | * @goal: preferred starting address of the region | |
249 | * | |
250 | * The goal is dropped if it can not be satisfied and the allocation will | |
251 | * fall back to memory below @goal. | |
252 | * | |
253 | * Allocation may happen on any node in the system. | |
254 | * | |
255 | * Returns NULL on failure. | |
256 | */ | |
257 | void * __init __alloc_bootmem_nopanic(unsigned long size, unsigned long align, | |
258 | unsigned long goal) | |
259 | { | |
260 | unsigned long limit = -1UL; | |
261 | ||
262 | return ___alloc_bootmem_nopanic(size, align, goal, limit); | |
263 | } | |
264 | ||
265 | static void * __init ___alloc_bootmem(unsigned long size, unsigned long align, | |
266 | unsigned long goal, unsigned long limit) | |
267 | { | |
268 | void *mem = ___alloc_bootmem_nopanic(size, align, goal, limit); | |
269 | ||
270 | if (mem) | |
271 | return mem; | |
272 | /* | |
273 | * Whoops, we cannot satisfy the allocation request. | |
274 | */ | |
275 | printk(KERN_ALERT "bootmem alloc of %lu bytes failed!\n", size); | |
276 | panic("Out of memory"); | |
277 | return NULL; | |
278 | } | |
279 | ||
280 | /** | |
281 | * __alloc_bootmem - allocate boot memory | |
282 | * @size: size of the request in bytes | |
283 | * @align: alignment of the region | |
284 | * @goal: preferred starting address of the region | |
285 | * | |
286 | * The goal is dropped if it can not be satisfied and the allocation will | |
287 | * fall back to memory below @goal. | |
288 | * | |
289 | * Allocation may happen on any node in the system. | |
290 | * | |
291 | * The function panics if the request can not be satisfied. | |
292 | */ | |
293 | void * __init __alloc_bootmem(unsigned long size, unsigned long align, | |
294 | unsigned long goal) | |
295 | { | |
296 | unsigned long limit = -1UL; | |
297 | ||
298 | return ___alloc_bootmem(size, align, goal, limit); | |
299 | } | |
300 | ||
99ab7b19 | 301 | void * __init ___alloc_bootmem_node_nopanic(pg_data_t *pgdat, |
ba539868 JW |
302 | unsigned long size, |
303 | unsigned long align, | |
304 | unsigned long goal, | |
305 | unsigned long limit) | |
306 | { | |
307 | void *ptr; | |
308 | ||
309 | again: | |
310 | ptr = __alloc_memory_core_early(pgdat->node_id, size, align, | |
311 | goal, limit); | |
312 | if (ptr) | |
313 | return ptr; | |
314 | ||
b1154233 | 315 | ptr = __alloc_memory_core_early(NUMA_NO_NODE, size, align, |
ba539868 JW |
316 | goal, limit); |
317 | if (ptr) | |
318 | return ptr; | |
319 | ||
320 | if (goal) { | |
321 | goal = 0; | |
322 | goto again; | |
323 | } | |
324 | ||
325 | return NULL; | |
326 | } | |
327 | ||
328 | void * __init __alloc_bootmem_node_nopanic(pg_data_t *pgdat, unsigned long size, | |
329 | unsigned long align, unsigned long goal) | |
330 | { | |
331 | if (WARN_ON_ONCE(slab_is_available())) | |
332 | return kzalloc_node(size, GFP_NOWAIT, pgdat->node_id); | |
333 | ||
334 | return ___alloc_bootmem_node_nopanic(pgdat, size, align, goal, 0); | |
335 | } | |
336 | ||
337 | void * __init ___alloc_bootmem_node(pg_data_t *pgdat, unsigned long size, | |
338 | unsigned long align, unsigned long goal, | |
339 | unsigned long limit) | |
340 | { | |
341 | void *ptr; | |
342 | ||
343 | ptr = ___alloc_bootmem_node_nopanic(pgdat, size, align, goal, limit); | |
344 | if (ptr) | |
345 | return ptr; | |
346 | ||
347 | printk(KERN_ALERT "bootmem alloc of %lu bytes failed!\n", size); | |
348 | panic("Out of memory"); | |
349 | return NULL; | |
350 | } | |
351 | ||
09325873 YL |
352 | /** |
353 | * __alloc_bootmem_node - allocate boot memory from a specific node | |
354 | * @pgdat: node to allocate from | |
355 | * @size: size of the request in bytes | |
356 | * @align: alignment of the region | |
357 | * @goal: preferred starting address of the region | |
358 | * | |
359 | * The goal is dropped if it can not be satisfied and the allocation will | |
360 | * fall back to memory below @goal. | |
361 | * | |
362 | * Allocation may fall back to any node in the system if the specified node | |
363 | * can not hold the requested memory. | |
364 | * | |
365 | * The function panics if the request can not be satisfied. | |
366 | */ | |
367 | void * __init __alloc_bootmem_node(pg_data_t *pgdat, unsigned long size, | |
368 | unsigned long align, unsigned long goal) | |
369 | { | |
09325873 YL |
370 | if (WARN_ON_ONCE(slab_is_available())) |
371 | return kzalloc_node(size, GFP_NOWAIT, pgdat->node_id); | |
372 | ||
ba539868 | 373 | return ___alloc_bootmem_node(pgdat, size, align, goal, 0); |
09325873 YL |
374 | } |
375 | ||
376 | void * __init __alloc_bootmem_node_high(pg_data_t *pgdat, unsigned long size, | |
377 | unsigned long align, unsigned long goal) | |
378 | { | |
09325873 | 379 | return __alloc_bootmem_node(pgdat, size, align, goal); |
09325873 YL |
380 | } |
381 | ||
09325873 YL |
382 | #ifndef ARCH_LOW_ADDRESS_LIMIT |
383 | #define ARCH_LOW_ADDRESS_LIMIT 0xffffffffUL | |
384 | #endif | |
385 | ||
386 | /** | |
387 | * __alloc_bootmem_low - allocate low boot memory | |
388 | * @size: size of the request in bytes | |
389 | * @align: alignment of the region | |
390 | * @goal: preferred starting address of the region | |
391 | * | |
392 | * The goal is dropped if it can not be satisfied and the allocation will | |
393 | * fall back to memory below @goal. | |
394 | * | |
395 | * Allocation may happen on any node in the system. | |
396 | * | |
397 | * The function panics if the request can not be satisfied. | |
398 | */ | |
399 | void * __init __alloc_bootmem_low(unsigned long size, unsigned long align, | |
400 | unsigned long goal) | |
401 | { | |
402 | return ___alloc_bootmem(size, align, goal, ARCH_LOW_ADDRESS_LIMIT); | |
403 | } | |
404 | ||
38fa4175 YL |
405 | void * __init __alloc_bootmem_low_nopanic(unsigned long size, |
406 | unsigned long align, | |
407 | unsigned long goal) | |
408 | { | |
409 | return ___alloc_bootmem_nopanic(size, align, goal, | |
410 | ARCH_LOW_ADDRESS_LIMIT); | |
411 | } | |
412 | ||
09325873 YL |
413 | /** |
414 | * __alloc_bootmem_low_node - allocate low boot memory from a specific node | |
415 | * @pgdat: node to allocate from | |
416 | * @size: size of the request in bytes | |
417 | * @align: alignment of the region | |
418 | * @goal: preferred starting address of the region | |
419 | * | |
420 | * The goal is dropped if it can not be satisfied and the allocation will | |
421 | * fall back to memory below @goal. | |
422 | * | |
423 | * Allocation may fall back to any node in the system if the specified node | |
424 | * can not hold the requested memory. | |
425 | * | |
426 | * The function panics if the request can not be satisfied. | |
427 | */ | |
428 | void * __init __alloc_bootmem_low_node(pg_data_t *pgdat, unsigned long size, | |
429 | unsigned long align, unsigned long goal) | |
430 | { | |
09325873 YL |
431 | if (WARN_ON_ONCE(slab_is_available())) |
432 | return kzalloc_node(size, GFP_NOWAIT, pgdat->node_id); | |
433 | ||
ba539868 JW |
434 | return ___alloc_bootmem_node(pgdat, size, align, goal, |
435 | ARCH_LOW_ADDRESS_LIMIT); | |
09325873 | 436 | } |