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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> | |
b95f1b31 | 14 | #include <linux/export.h> |
09325873 YL |
15 | #include <linux/kmemleak.h> |
16 | #include <linux/range.h> | |
17 | #include <linux/memblock.h> | |
2382705f | 18 | #include <linux/bootmem.h> |
09325873 YL |
19 | |
20 | #include <asm/bug.h> | |
21 | #include <asm/io.h> | |
09325873 YL |
22 | |
23 | #include "internal.h" | |
24 | ||
2382705f | 25 | #ifndef CONFIG_HAVE_MEMBLOCK |
26 | #error CONFIG_HAVE_MEMBLOCK not defined | |
27 | #endif | |
28 | ||
e782ab42 YL |
29 | #ifndef CONFIG_NEED_MULTIPLE_NODES |
30 | struct pglist_data __refdata contig_page_data; | |
31 | EXPORT_SYMBOL(contig_page_data); | |
32 | #endif | |
33 | ||
09325873 YL |
34 | unsigned long max_low_pfn; |
35 | unsigned long min_low_pfn; | |
36 | unsigned long max_pfn; | |
8dd33030 | 37 | unsigned long long max_possible_pfn; |
09325873 | 38 | |
8bc1f91e YL |
39 | static void * __init __alloc_memory_core_early(int nid, u64 size, u64 align, |
40 | u64 goal, u64 limit) | |
41 | { | |
42 | void *ptr; | |
43 | u64 addr; | |
a3f5bafc | 44 | ulong flags = choose_memblock_flags(); |
8bc1f91e YL |
45 | |
46 | if (limit > memblock.current_limit) | |
47 | limit = memblock.current_limit; | |
48 | ||
a3f5bafc | 49 | again: |
fc6daaf9 | 50 | addr = memblock_find_in_range_node(size, align, goal, limit, nid, |
a3f5bafc TL |
51 | flags); |
52 | if (!addr && (flags & MEMBLOCK_MIRROR)) { | |
53 | flags &= ~MEMBLOCK_MIRROR; | |
54 | pr_warn("Could not allocate %pap bytes of mirrored memory\n", | |
55 | &size); | |
56 | goto again; | |
57 | } | |
1f5026a7 | 58 | if (!addr) |
8bc1f91e YL |
59 | return NULL; |
60 | ||
87379ec8 PH |
61 | if (memblock_reserve(addr, size)) |
62 | return NULL; | |
63 | ||
8bc1f91e YL |
64 | ptr = phys_to_virt(addr); |
65 | memset(ptr, 0, size); | |
8bc1f91e YL |
66 | /* |
67 | * The min_count is set to 0 so that bootmem allocated blocks | |
68 | * are never reported as leaks. | |
69 | */ | |
70 | kmemleak_alloc(ptr, size, 0, 0); | |
71 | return ptr; | |
72 | } | |
73 | ||
09325873 YL |
74 | /* |
75 | * free_bootmem_late - free bootmem pages directly to page allocator | |
76 | * @addr: starting address of the range | |
77 | * @size: size of the range in bytes | |
78 | * | |
79 | * This is only useful when the bootmem allocator has already been torn | |
80 | * down, but we are still initializing the system. Pages are given directly | |
81 | * to the page allocator, no bootmem metadata is updated because it is gone. | |
82 | */ | |
83 | void __init free_bootmem_late(unsigned long addr, unsigned long size) | |
84 | { | |
85 | unsigned long cursor, end; | |
86 | ||
9099daed | 87 | kmemleak_free_part_phys(addr, size); |
09325873 YL |
88 | |
89 | cursor = PFN_UP(addr); | |
90 | end = PFN_DOWN(addr + size); | |
91 | ||
92 | for (; cursor < end; cursor++) { | |
d70ddd7a | 93 | __free_pages_bootmem(pfn_to_page(cursor), cursor, 0); |
09325873 YL |
94 | totalram_pages++; |
95 | } | |
96 | } | |
97 | ||
98 | static void __init __free_pages_memory(unsigned long start, unsigned long end) | |
99 | { | |
309d0b39 | 100 | int order; |
09325873 | 101 | |
309d0b39 RH |
102 | while (start < end) { |
103 | order = min(MAX_ORDER - 1UL, __ffs(start)); | |
09325873 | 104 | |
309d0b39 RH |
105 | while (start + (1UL << order) > end) |
106 | order--; | |
09325873 | 107 | |
d70ddd7a | 108 | __free_pages_bootmem(pfn_to_page(start), start, order); |
09325873 | 109 | |
309d0b39 RH |
110 | start += (1UL << order); |
111 | } | |
09325873 YL |
112 | } |
113 | ||
29f67386 YL |
114 | static unsigned long __init __free_memory_core(phys_addr_t start, |
115 | phys_addr_t end) | |
116 | { | |
117 | unsigned long start_pfn = PFN_UP(start); | |
118 | unsigned long end_pfn = min_t(unsigned long, | |
119 | PFN_DOWN(end), max_low_pfn); | |
120 | ||
172ffeb9 | 121 | if (start_pfn >= end_pfn) |
29f67386 YL |
122 | return 0; |
123 | ||
124 | __free_pages_memory(start_pfn, end_pfn); | |
125 | ||
126 | return end_pfn - start_pfn; | |
127 | } | |
128 | ||
b4def350 | 129 | static unsigned long __init free_low_memory_core_early(void) |
09325873 | 130 | { |
09325873 | 131 | unsigned long count = 0; |
354f17e1 | 132 | phys_addr_t start, end; |
8a9ca34c TH |
133 | u64 i; |
134 | ||
0a313a99 XQ |
135 | memblock_clear_hotplug(0, -1); |
136 | ||
92923ca3 NZ |
137 | for_each_reserved_mem_region(i, &start, &end) |
138 | reserve_bootmem_region(start, end); | |
139 | ||
914a0516 WG |
140 | /* |
141 | * We need to use NUMA_NO_NODE instead of NODE_DATA(0)->node_id | |
142 | * because in some case like Node0 doesn't have RAM installed | |
143 | * low ram will be on Node1 | |
144 | */ | |
fc6daaf9 TL |
145 | for_each_free_mem_range(i, NUMA_NO_NODE, MEMBLOCK_NONE, &start, &end, |
146 | NULL) | |
29f67386 YL |
147 | count += __free_memory_core(start, end); |
148 | ||
09325873 YL |
149 | return count; |
150 | } | |
151 | ||
7b4b2a0d JL |
152 | static int reset_managed_pages_done __initdata; |
153 | ||
f784a3f1 | 154 | void reset_node_managed_pages(pg_data_t *pgdat) |
9feedc9d JL |
155 | { |
156 | struct zone *z; | |
157 | ||
9feedc9d | 158 | for (z = pgdat->node_zones; z < pgdat->node_zones + MAX_NR_ZONES; z++) |
7b4b2a0d JL |
159 | z->managed_pages = 0; |
160 | } | |
161 | ||
162 | void __init reset_all_zones_managed_pages(void) | |
163 | { | |
164 | struct pglist_data *pgdat; | |
165 | ||
f784a3f1 TC |
166 | if (reset_managed_pages_done) |
167 | return; | |
168 | ||
7b4b2a0d JL |
169 | for_each_online_pgdat(pgdat) |
170 | reset_node_managed_pages(pgdat); | |
f784a3f1 | 171 | |
7b4b2a0d | 172 | reset_managed_pages_done = 1; |
9feedc9d JL |
173 | } |
174 | ||
09325873 YL |
175 | /** |
176 | * free_all_bootmem - release free pages to the buddy allocator | |
177 | * | |
178 | * Returns the number of pages actually released. | |
179 | */ | |
180 | unsigned long __init free_all_bootmem(void) | |
181 | { | |
0c988534 JL |
182 | unsigned long pages; |
183 | ||
7b4b2a0d | 184 | reset_all_zones_managed_pages(); |
9feedc9d | 185 | |
0c988534 JL |
186 | pages = free_low_memory_core_early(); |
187 | totalram_pages += pages; | |
188 | ||
189 | return pages; | |
09325873 YL |
190 | } |
191 | ||
192 | /** | |
193 | * free_bootmem_node - mark a page range as usable | |
194 | * @pgdat: node the range resides on | |
195 | * @physaddr: starting address of the range | |
196 | * @size: size of the range in bytes | |
197 | * | |
198 | * Partial pages will be considered reserved and left as they are. | |
199 | * | |
200 | * The range must reside completely on the specified node. | |
201 | */ | |
202 | void __init free_bootmem_node(pg_data_t *pgdat, unsigned long physaddr, | |
203 | unsigned long size) | |
204 | { | |
24aa0788 | 205 | memblock_free(physaddr, size); |
09325873 YL |
206 | } |
207 | ||
208 | /** | |
209 | * free_bootmem - mark a page range as usable | |
210 | * @addr: starting address of the range | |
211 | * @size: size of the range in bytes | |
212 | * | |
213 | * Partial pages will be considered reserved and left as they are. | |
214 | * | |
215 | * The range must be contiguous but may span node boundaries. | |
216 | */ | |
217 | void __init free_bootmem(unsigned long addr, unsigned long size) | |
218 | { | |
24aa0788 | 219 | memblock_free(addr, size); |
09325873 YL |
220 | } |
221 | ||
222 | static void * __init ___alloc_bootmem_nopanic(unsigned long size, | |
223 | unsigned long align, | |
224 | unsigned long goal, | |
225 | unsigned long limit) | |
226 | { | |
227 | void *ptr; | |
228 | ||
229 | if (WARN_ON_ONCE(slab_is_available())) | |
230 | return kzalloc(size, GFP_NOWAIT); | |
231 | ||
232 | restart: | |
233 | ||
b1154233 | 234 | ptr = __alloc_memory_core_early(NUMA_NO_NODE, size, align, goal, limit); |
09325873 YL |
235 | |
236 | if (ptr) | |
237 | return ptr; | |
238 | ||
239 | if (goal != 0) { | |
240 | goal = 0; | |
241 | goto restart; | |
242 | } | |
243 | ||
244 | return NULL; | |
245 | } | |
246 | ||
247 | /** | |
248 | * __alloc_bootmem_nopanic - allocate boot memory without panicking | |
249 | * @size: size of the request in bytes | |
250 | * @align: alignment of the region | |
251 | * @goal: preferred starting address of the region | |
252 | * | |
253 | * The goal is dropped if it can not be satisfied and the allocation will | |
254 | * fall back to memory below @goal. | |
255 | * | |
256 | * Allocation may happen on any node in the system. | |
257 | * | |
258 | * Returns NULL on failure. | |
259 | */ | |
260 | void * __init __alloc_bootmem_nopanic(unsigned long size, unsigned long align, | |
261 | unsigned long goal) | |
262 | { | |
263 | unsigned long limit = -1UL; | |
264 | ||
265 | return ___alloc_bootmem_nopanic(size, align, goal, limit); | |
266 | } | |
267 | ||
268 | static void * __init ___alloc_bootmem(unsigned long size, unsigned long align, | |
269 | unsigned long goal, unsigned long limit) | |
270 | { | |
271 | void *mem = ___alloc_bootmem_nopanic(size, align, goal, limit); | |
272 | ||
273 | if (mem) | |
274 | return mem; | |
275 | /* | |
276 | * Whoops, we cannot satisfy the allocation request. | |
277 | */ | |
1170532b | 278 | pr_alert("bootmem alloc of %lu bytes failed!\n", size); |
09325873 YL |
279 | panic("Out of memory"); |
280 | return NULL; | |
281 | } | |
282 | ||
283 | /** | |
284 | * __alloc_bootmem - allocate boot memory | |
285 | * @size: size of the request in bytes | |
286 | * @align: alignment of the region | |
287 | * @goal: preferred starting address of the region | |
288 | * | |
289 | * The goal is dropped if it can not be satisfied and the allocation will | |
290 | * fall back to memory below @goal. | |
291 | * | |
292 | * Allocation may happen on any node in the system. | |
293 | * | |
294 | * The function panics if the request can not be satisfied. | |
295 | */ | |
296 | void * __init __alloc_bootmem(unsigned long size, unsigned long align, | |
297 | unsigned long goal) | |
298 | { | |
299 | unsigned long limit = -1UL; | |
300 | ||
301 | return ___alloc_bootmem(size, align, goal, limit); | |
302 | } | |
303 | ||
99ab7b19 | 304 | void * __init ___alloc_bootmem_node_nopanic(pg_data_t *pgdat, |
ba539868 JW |
305 | unsigned long size, |
306 | unsigned long align, | |
307 | unsigned long goal, | |
308 | unsigned long limit) | |
309 | { | |
310 | void *ptr; | |
311 | ||
312 | again: | |
313 | ptr = __alloc_memory_core_early(pgdat->node_id, size, align, | |
314 | goal, limit); | |
315 | if (ptr) | |
316 | return ptr; | |
317 | ||
b1154233 | 318 | ptr = __alloc_memory_core_early(NUMA_NO_NODE, size, align, |
ba539868 JW |
319 | goal, limit); |
320 | if (ptr) | |
321 | return ptr; | |
322 | ||
323 | if (goal) { | |
324 | goal = 0; | |
325 | goto again; | |
326 | } | |
327 | ||
328 | return NULL; | |
329 | } | |
330 | ||
331 | void * __init __alloc_bootmem_node_nopanic(pg_data_t *pgdat, unsigned long size, | |
332 | unsigned long align, unsigned long goal) | |
333 | { | |
334 | if (WARN_ON_ONCE(slab_is_available())) | |
335 | return kzalloc_node(size, GFP_NOWAIT, pgdat->node_id); | |
336 | ||
337 | return ___alloc_bootmem_node_nopanic(pgdat, size, align, goal, 0); | |
338 | } | |
339 | ||
de498507 | 340 | static void * __init ___alloc_bootmem_node(pg_data_t *pgdat, unsigned long size, |
ba539868 JW |
341 | unsigned long align, unsigned long goal, |
342 | unsigned long limit) | |
343 | { | |
344 | void *ptr; | |
345 | ||
346 | ptr = ___alloc_bootmem_node_nopanic(pgdat, size, align, goal, limit); | |
347 | if (ptr) | |
348 | return ptr; | |
349 | ||
1170532b | 350 | pr_alert("bootmem alloc of %lu bytes failed!\n", size); |
ba539868 JW |
351 | panic("Out of memory"); |
352 | return NULL; | |
353 | } | |
354 | ||
09325873 YL |
355 | /** |
356 | * __alloc_bootmem_node - allocate boot memory from a specific node | |
357 | * @pgdat: node to allocate from | |
358 | * @size: size of the request in bytes | |
359 | * @align: alignment of the region | |
360 | * @goal: preferred starting address of the region | |
361 | * | |
362 | * The goal is dropped if it can not be satisfied and the allocation will | |
363 | * fall back to memory below @goal. | |
364 | * | |
365 | * Allocation may fall back to any node in the system if the specified node | |
366 | * can not hold the requested memory. | |
367 | * | |
368 | * The function panics if the request can not be satisfied. | |
369 | */ | |
370 | void * __init __alloc_bootmem_node(pg_data_t *pgdat, unsigned long size, | |
371 | unsigned long align, unsigned long goal) | |
372 | { | |
09325873 YL |
373 | if (WARN_ON_ONCE(slab_is_available())) |
374 | return kzalloc_node(size, GFP_NOWAIT, pgdat->node_id); | |
375 | ||
ba539868 | 376 | return ___alloc_bootmem_node(pgdat, size, align, goal, 0); |
09325873 YL |
377 | } |
378 | ||
379 | void * __init __alloc_bootmem_node_high(pg_data_t *pgdat, unsigned long size, | |
380 | unsigned long align, unsigned long goal) | |
381 | { | |
09325873 | 382 | return __alloc_bootmem_node(pgdat, size, align, goal); |
09325873 YL |
383 | } |
384 | ||
09325873 YL |
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 | } |