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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> |
15 | #include <linux/module.h> |
16 | #include <linux/kmemleak.h> |
17 | #include <linux/range.h> |
18 | |
19 | #include <asm/bug.h> |
20 | #include <asm/io.h> |
21 | #include <asm/processor.h> |
22 | |
23 | #include "internal.h" |
24 | |
25 | unsigned long max_low_pfn; |
26 | unsigned long min_low_pfn; |
27 | unsigned long max_pfn; |
28 | |
29 | #ifdef CONFIG_CRASH_DUMP |
30 | /* |
31 | * If we have booted due to a crash, max_pfn will be a very low value. We need |
32 | * to know the amount of memory that the previous kernel used. |
33 | */ |
34 | unsigned long saved_max_pfn; |
35 | #endif |
36 | |
37 | #ifndef CONFIG_NO_BOOTMEM |
38 | bootmem_data_t bootmem_node_data[MAX_NUMNODES] __initdata; |
39 | |
40 | static struct list_head bdata_list __initdata = LIST_HEAD_INIT(bdata_list); |
41 | |
42 | static int bootmem_debug; |
43 | |
44 | static int __init bootmem_debug_setup(char *buf) |
45 | { |
46 | bootmem_debug = 1; |
47 | return 0; |
48 | } |
49 | early_param("bootmem_debug", bootmem_debug_setup); |
50 | |
51 | #define bdebug(fmt, args...) ({ \ |
52 | if (unlikely(bootmem_debug)) \ |
53 | printk(KERN_INFO \ |
54 | "bootmem::%s " fmt, \ |
55 | __func__, ## args); \ |
56 | }) |
57 | |
58 | static unsigned long __init bootmap_bytes(unsigned long pages) |
59 | { |
60 | unsigned long bytes = (pages + 7) / 8; |
61 | |
62 | return ALIGN(bytes, sizeof(long)); |
63 | } |
64 | |
65 | /** |
66 | * bootmem_bootmap_pages - calculate bitmap size in pages |
67 | * @pages: number of pages the bitmap has to represent |
68 | */ |
69 | unsigned long __init bootmem_bootmap_pages(unsigned long pages) |
70 | { |
71 | unsigned long bytes = bootmap_bytes(pages); |
72 | |
73 | return PAGE_ALIGN(bytes) >> PAGE_SHIFT; |
74 | } |
75 | |
76 | /* |
77 | * link bdata in order |
78 | */ |
79 | static void __init link_bootmem(bootmem_data_t *bdata) |
80 | { |
81 | struct list_head *iter; |
82 | |
83 | list_for_each(iter, &bdata_list) { |
84 | bootmem_data_t *ent; |
85 | |
86 | ent = list_entry(iter, bootmem_data_t, list); |
87 | if (bdata->node_min_pfn < ent->node_min_pfn) |
88 | break; |
89 | } |
90 | list_add_tail(&bdata->list, iter); |
91 | } |
92 | |
93 | /* |
94 | * Called once to set up the allocator itself. |
95 | */ |
96 | static unsigned long __init init_bootmem_core(bootmem_data_t *bdata, |
97 | unsigned long mapstart, unsigned long start, unsigned long end) |
98 | { |
99 | unsigned long mapsize; |
100 | |
101 | mminit_validate_memmodel_limits(&start, &end); |
102 | bdata->node_bootmem_map = phys_to_virt(PFN_PHYS(mapstart)); |
103 | bdata->node_min_pfn = start; |
104 | bdata->node_low_pfn = end; |
105 | link_bootmem(bdata); |
106 | |
107 | /* |
108 | * Initially all pages are reserved - setup_arch() has to |
109 | * register free RAM areas explicitly. |
110 | */ |
111 | mapsize = bootmap_bytes(end - start); |
112 | memset(bdata->node_bootmem_map, 0xff, mapsize); |
113 | |
114 | bdebug("nid=%td start=%lx map=%lx end=%lx mapsize=%lx\n", |
115 | bdata - bootmem_node_data, start, mapstart, end, mapsize); |
116 | |
117 | return mapsize; |
118 | } |
119 | |
120 | /** |
121 | * init_bootmem_node - register a node as boot memory |
122 | * @pgdat: node to register |
123 | * @freepfn: pfn where the bitmap for this node is to be placed |
124 | * @startpfn: first pfn on the node |
125 | * @endpfn: first pfn after the node |
126 | * |
127 | * Returns the number of bytes needed to hold the bitmap for this node. |
128 | */ |
129 | unsigned long __init init_bootmem_node(pg_data_t *pgdat, unsigned long freepfn, |
130 | unsigned long startpfn, unsigned long endpfn) |
131 | { |
132 | return init_bootmem_core(pgdat->bdata, freepfn, startpfn, endpfn); |
133 | } |
134 | |
135 | /** |
136 | * init_bootmem - register boot memory |
137 | * @start: pfn where the bitmap is to be placed |
138 | * @pages: number of available physical pages |
139 | * |
140 | * Returns the number of bytes needed to hold the bitmap. |
141 | */ |
142 | unsigned long __init init_bootmem(unsigned long start, unsigned long pages) |
143 | { |
144 | max_low_pfn = pages; |
145 | min_low_pfn = start; |
146 | return init_bootmem_core(NODE_DATA(0)->bdata, start, 0, pages); |
147 | } |
148 | #endif |
149 | /* |
150 | * free_bootmem_late - free bootmem pages directly to page allocator |
151 | * @addr: starting address of the range |
152 | * @size: size of the range in bytes |
153 | * |
154 | * This is only useful when the bootmem allocator has already been torn |
155 | * down, but we are still initializing the system. Pages are given directly |
156 | * to the page allocator, no bootmem metadata is updated because it is gone. |
157 | */ |
158 | void __init free_bootmem_late(unsigned long addr, unsigned long size) |
159 | { |
160 | unsigned long cursor, end; |
161 | |
162 | kmemleak_free_part(__va(addr), size); |
163 | |
164 | cursor = PFN_UP(addr); |
165 | end = PFN_DOWN(addr + size); |
166 | |
167 | for (; cursor < end; cursor++) { |
168 | __free_pages_bootmem(pfn_to_page(cursor), 0); |
169 | totalram_pages++; |
170 | } |
171 | } |
172 | |
173 | #ifdef CONFIG_NO_BOOTMEM |
174 | static void __init __free_pages_memory(unsigned long start, unsigned long end) |
175 | { |
176 | int i; |
177 | unsigned long start_aligned, end_aligned; |
178 | int order = ilog2(BITS_PER_LONG); |
179 | |
180 | start_aligned = (start + (BITS_PER_LONG - 1)) & ~(BITS_PER_LONG - 1); |
181 | end_aligned = end & ~(BITS_PER_LONG - 1); |
182 | |
183 | if (end_aligned <= start_aligned) { |
184 | for (i = start; i < end; i++) |
185 | __free_pages_bootmem(pfn_to_page(i), 0); |
186 | |
187 | return; |
188 | } |
189 | |
190 | for (i = start; i < start_aligned; i++) |
191 | __free_pages_bootmem(pfn_to_page(i), 0); |
192 | |
193 | for (i = start_aligned; i < end_aligned; i += BITS_PER_LONG) |
194 | __free_pages_bootmem(pfn_to_page(i), order); |
195 | |
196 | for (i = end_aligned; i < end; i++) |
197 | __free_pages_bootmem(pfn_to_page(i), 0); |
198 | } |
199 | |
200 | unsigned long __init free_all_memory_core_early(int nodeid) |
201 | { |
202 | int i; |
203 | u64 start, end; |
204 | unsigned long count = 0; |
205 | struct range *range = NULL; |
206 | int nr_range; |
207 | |
208 | nr_range = get_free_all_memory_range(&range, nodeid); |
209 | |
210 | for (i = 0; i < nr_range; i++) { |
211 | start = range[i].start; |
212 | end = range[i].end; |
213 | count += end - start; |
214 | __free_pages_memory(start, end); |
215 | } |
216 | |
217 | return count; |
218 | } |
219 | #else |
220 | static unsigned long __init free_all_bootmem_core(bootmem_data_t *bdata) |
221 | { |
222 | int aligned; |
223 | struct page *page; |
224 | unsigned long start, end, pages, count = 0; |
225 | |
226 | if (!bdata->node_bootmem_map) |
227 | return 0; |
228 | |
229 | start = bdata->node_min_pfn; |
230 | end = bdata->node_low_pfn; |
231 | |
232 | /* |
233 | * If the start is aligned to the machines wordsize, we might |
234 | * be able to free pages in bulks of that order. |
235 | */ |
236 | aligned = !(start & (BITS_PER_LONG - 1)); |
237 | |
238 | bdebug("nid=%td start=%lx end=%lx aligned=%d\n", |
239 | bdata - bootmem_node_data, start, end, aligned); |
240 | |
241 | while (start < end) { |
242 | unsigned long *map, idx, vec; |
243 | |
244 | map = bdata->node_bootmem_map; |
245 | idx = start - bdata->node_min_pfn; |
246 | vec = ~map[idx / BITS_PER_LONG]; |
247 | |
248 | if (aligned && vec == ~0UL && start + BITS_PER_LONG < end) { |
249 | int order = ilog2(BITS_PER_LONG); |
250 | |
251 | __free_pages_bootmem(pfn_to_page(start), order); |
252 | count += BITS_PER_LONG; |
253 | } else { |
254 | unsigned long off = 0; |
255 | |
256 | while (vec && off < BITS_PER_LONG) { |
257 | if (vec & 1) { |
258 | page = pfn_to_page(start + off); |
259 | __free_pages_bootmem(page, 0); |
260 | count++; |
261 | } |
262 | vec >>= 1; |
263 | off++; |
264 | } |
265 | } |
266 | start += BITS_PER_LONG; |
267 | } |
268 | |
269 | page = virt_to_page(bdata->node_bootmem_map); |
270 | pages = bdata->node_low_pfn - bdata->node_min_pfn; |
271 | pages = bootmem_bootmap_pages(pages); |
272 | count += pages; |
273 | while (pages--) |
274 | __free_pages_bootmem(page++, 0); |
275 | |
276 | bdebug("nid=%td released=%lx\n", bdata - bootmem_node_data, count); |
277 | |
278 | return count; |
279 | } |
280 | #endif |
281 | |
282 | /** |
283 | * free_all_bootmem_node - release a node's free pages to the buddy allocator |
284 | * @pgdat: node to be released |
285 | * |
286 | * Returns the number of pages actually released. |
287 | */ |
288 | unsigned long __init free_all_bootmem_node(pg_data_t *pgdat) |
289 | { |
290 | register_page_bootmem_info_node(pgdat); |
291 | #ifdef CONFIG_NO_BOOTMEM |
292 | /* free_all_memory_core_early(MAX_NUMNODES) will be called later */ |
293 | return 0; |
294 | #else |
295 | return free_all_bootmem_core(pgdat->bdata); |
296 | #endif |
297 | } |
298 | |
299 | /** |
300 | * free_all_bootmem - release free pages to the buddy allocator |
301 | * |
302 | * Returns the number of pages actually released. |
303 | */ |
304 | unsigned long __init free_all_bootmem(void) |
305 | { |
306 | #ifdef CONFIG_NO_BOOTMEM |
307 | /* |
308 | * We need to use MAX_NUMNODES instead of NODE_DATA(0)->node_id |
309 | * because in some case like Node0 doesnt have RAM installed |
310 | * low ram will be on Node1 |
311 | * Use MAX_NUMNODES will make sure all ranges in early_node_map[] |
312 | * will be used instead of only Node0 related |
313 | */ |
314 | return free_all_memory_core_early(MAX_NUMNODES); |
315 | #else |
316 | unsigned long total_pages = 0; |
317 | bootmem_data_t *bdata; |
318 | |
319 | list_for_each_entry(bdata, &bdata_list, list) |
320 | total_pages += free_all_bootmem_core(bdata); |
321 | |
322 | return total_pages; |
323 | #endif |
324 | } |
325 | |
326 | #ifndef CONFIG_NO_BOOTMEM |
327 | static void __init __free(bootmem_data_t *bdata, |
328 | unsigned long sidx, unsigned long eidx) |
329 | { |
330 | unsigned long idx; |
331 | |
332 | bdebug("nid=%td start=%lx end=%lx\n", bdata - bootmem_node_data, |
333 | sidx + bdata->node_min_pfn, |
334 | eidx + bdata->node_min_pfn); |
335 | |
336 | if (bdata->hint_idx > sidx) |
337 | bdata->hint_idx = sidx; |
338 | |
339 | for (idx = sidx; idx < eidx; idx++) |
340 | if (!test_and_clear_bit(idx, bdata->node_bootmem_map)) |
341 | BUG(); |
342 | } |
343 | |
344 | static int __init __reserve(bootmem_data_t *bdata, unsigned long sidx, |
345 | unsigned long eidx, int flags) |
346 | { |
347 | unsigned long idx; |
348 | int exclusive = flags & BOOTMEM_EXCLUSIVE; |
349 | |
350 | bdebug("nid=%td start=%lx end=%lx flags=%x\n", |
351 | bdata - bootmem_node_data, |
352 | sidx + bdata->node_min_pfn, |
353 | eidx + bdata->node_min_pfn, |
354 | flags); |
355 | |
356 | for (idx = sidx; idx < eidx; idx++) |
357 | if (test_and_set_bit(idx, bdata->node_bootmem_map)) { |
358 | if (exclusive) { |
359 | __free(bdata, sidx, idx); |
360 | return -EBUSY; |
361 | } |
362 | bdebug("silent double reserve of PFN %lx\n", |
363 | idx + bdata->node_min_pfn); |
364 | } |
365 | return 0; |
366 | } |
367 | |
368 | static int __init mark_bootmem_node(bootmem_data_t *bdata, |
369 | unsigned long start, unsigned long end, |
370 | int reserve, int flags) |
371 | { |
372 | unsigned long sidx, eidx; |
373 | |
374 | bdebug("nid=%td start=%lx end=%lx reserve=%d flags=%x\n", |
375 | bdata - bootmem_node_data, start, end, reserve, flags); |
376 | |
377 | BUG_ON(start < bdata->node_min_pfn); |
378 | BUG_ON(end > bdata->node_low_pfn); |
379 | |
380 | sidx = start - bdata->node_min_pfn; |
381 | eidx = end - bdata->node_min_pfn; |
382 | |
383 | if (reserve) |
384 | return __reserve(bdata, sidx, eidx, flags); |
385 | else |
386 | __free(bdata, sidx, eidx); |
387 | return 0; |
388 | } |
389 | |
390 | static int __init mark_bootmem(unsigned long start, unsigned long end, |
391 | int reserve, int flags) |
392 | { |
393 | unsigned long pos; |
394 | bootmem_data_t *bdata; |
395 | |
396 | pos = start; |
397 | list_for_each_entry(bdata, &bdata_list, list) { |
398 | int err; |
399 | unsigned long max; |
400 | |
401 | if (pos < bdata->node_min_pfn || |
402 | pos >= bdata->node_low_pfn) { |
403 | BUG_ON(pos != start); |
404 | continue; |
405 | } |
406 | |
407 | max = min(bdata->node_low_pfn, end); |
408 | |
409 | err = mark_bootmem_node(bdata, pos, max, reserve, flags); |
410 | if (reserve && err) { |
411 | mark_bootmem(start, pos, 0, 0); |
412 | return err; |
413 | } |
414 | |
415 | if (max == end) |
416 | return 0; |
417 | pos = bdata->node_low_pfn; |
418 | } |
419 | BUG(); |
420 | } |
421 | #endif |
422 | |
423 | /** |
424 | * free_bootmem_node - mark a page range as usable |
425 | * @pgdat: node the range resides on |
426 | * @physaddr: starting address of the range |
427 | * @size: size of the range in bytes |
428 | * |
429 | * Partial pages will be considered reserved and left as they are. |
430 | * |
431 | * The range must reside completely on the specified node. |
432 | */ |
433 | void __init free_bootmem_node(pg_data_t *pgdat, unsigned long physaddr, |
434 | unsigned long size) |
435 | { |
436 | #ifdef CONFIG_NO_BOOTMEM |
437 | free_early(physaddr, physaddr + size); |
438 | #else |
439 | unsigned long start, end; |
440 | |
441 | kmemleak_free_part(__va(physaddr), size); |
442 | |
443 | start = PFN_UP(physaddr); |
444 | end = PFN_DOWN(physaddr + size); |
445 | |
446 | mark_bootmem_node(pgdat->bdata, start, end, 0, 0); |
447 | #endif |
448 | } |
449 | |
450 | /** |
451 | * free_bootmem - mark a page range as usable |
452 | * @addr: starting address of the range |
453 | * @size: size of the range in bytes |
454 | * |
455 | * Partial pages will be considered reserved and left as they are. |
456 | * |
457 | * The range must be contiguous but may span node boundaries. |
458 | */ |
459 | void __init free_bootmem(unsigned long addr, unsigned long size) |
460 | { |
461 | #ifdef CONFIG_NO_BOOTMEM |
462 | free_early(addr, addr + size); |
463 | #else |
464 | unsigned long start, end; |
465 | |
466 | kmemleak_free_part(__va(addr), size); |
467 | |
468 | start = PFN_UP(addr); |
469 | end = PFN_DOWN(addr + size); |
470 | |
471 | mark_bootmem(start, end, 0, 0); |
472 | #endif |
473 | } |
474 | |
475 | /** |
476 | * reserve_bootmem_node - mark a page range as reserved |
477 | * @pgdat: node the range resides on |
478 | * @physaddr: starting address of the range |
479 | * @size: size of the range in bytes |
480 | * @flags: reservation flags (see linux/bootmem.h) |
481 | * |
482 | * Partial pages will be reserved. |
483 | * |
484 | * The range must reside completely on the specified node. |
485 | */ |
486 | int __init reserve_bootmem_node(pg_data_t *pgdat, unsigned long physaddr, |
487 | unsigned long size, int flags) |
488 | { |
489 | #ifdef CONFIG_NO_BOOTMEM |
490 | panic("no bootmem"); |
491 | return 0; |
492 | #else |
493 | unsigned long start, end; |
494 | |
495 | start = PFN_DOWN(physaddr); |
496 | end = PFN_UP(physaddr + size); |
497 | |
498 | return mark_bootmem_node(pgdat->bdata, start, end, 1, flags); |
499 | #endif |
500 | } |
501 | |
502 | /** |
503 | * reserve_bootmem - mark a page range as usable |
504 | * @addr: starting address of the range |
505 | * @size: size of the range in bytes |
506 | * @flags: reservation flags (see linux/bootmem.h) |
507 | * |
508 | * Partial pages will be reserved. |
509 | * |
510 | * The range must be contiguous but may span node boundaries. |
511 | */ |
512 | int __init reserve_bootmem(unsigned long addr, unsigned long size, |
513 | int flags) |
514 | { |
515 | #ifdef CONFIG_NO_BOOTMEM |
516 | panic("no bootmem"); |
517 | return 0; |
518 | #else |
519 | unsigned long start, end; |
520 | |
521 | start = PFN_DOWN(addr); |
522 | end = PFN_UP(addr + size); |
523 | |
524 | return mark_bootmem(start, end, 1, flags); |
525 | #endif |
526 | } |
527 | |
528 | #ifndef CONFIG_NO_BOOTMEM |
529 | static unsigned long __init align_idx(struct bootmem_data *bdata, |
530 | unsigned long idx, unsigned long step) |
531 | { |
532 | unsigned long base = bdata->node_min_pfn; |
533 | |
534 | /* |
535 | * Align the index with respect to the node start so that the |
536 | * combination of both satisfies the requested alignment. |
537 | */ |
538 | |
539 | return ALIGN(base + idx, step) - base; |
540 | } |
541 | |
542 | static unsigned long __init align_off(struct bootmem_data *bdata, |
543 | unsigned long off, unsigned long align) |
544 | { |
545 | unsigned long base = PFN_PHYS(bdata->node_min_pfn); |
546 | |
547 | /* Same as align_idx for byte offsets */ |
548 | |
549 | return ALIGN(base + off, align) - base; |
550 | } |
551 | |
552 | static void * __init alloc_bootmem_core(struct bootmem_data *bdata, |
553 | unsigned long size, unsigned long align, |
554 | unsigned long goal, unsigned long limit) |
555 | { |
556 | unsigned long fallback = 0; |
557 | unsigned long min, max, start, sidx, midx, step; |
558 | |
559 | bdebug("nid=%td size=%lx [%lu pages] align=%lx goal=%lx limit=%lx\n", |
560 | bdata - bootmem_node_data, size, PAGE_ALIGN(size) >> PAGE_SHIFT, |
561 | align, goal, limit); |
562 | |
563 | BUG_ON(!size); |
564 | BUG_ON(align & (align - 1)); |
565 | BUG_ON(limit && goal + size > limit); |
566 | |
567 | if (!bdata->node_bootmem_map) |
568 | return NULL; |
569 | |
570 | min = bdata->node_min_pfn; |
571 | max = bdata->node_low_pfn; |
572 | |
573 | goal >>= PAGE_SHIFT; |
574 | limit >>= PAGE_SHIFT; |
575 | |
576 | if (limit && max > limit) |
577 | max = limit; |
578 | if (max <= min) |
579 | return NULL; |
580 | |
581 | step = max(align >> PAGE_SHIFT, 1UL); |
582 | |
583 | if (goal && min < goal && goal < max) |
584 | start = ALIGN(goal, step); |
585 | else |
586 | start = ALIGN(min, step); |
587 | |
588 | sidx = start - bdata->node_min_pfn; |
589 | midx = max - bdata->node_min_pfn; |
590 | |
591 | if (bdata->hint_idx > sidx) { |
592 | /* |
593 | * Handle the valid case of sidx being zero and still |
594 | * catch the fallback below. |
595 | */ |
596 | fallback = sidx + 1; |
597 | sidx = align_idx(bdata, bdata->hint_idx, step); |
598 | } |
599 | |
600 | while (1) { |
601 | int merge; |
602 | void *region; |
603 | unsigned long eidx, i, start_off, end_off; |
604 | find_block: |
605 | sidx = find_next_zero_bit(bdata->node_bootmem_map, midx, sidx); |
606 | sidx = align_idx(bdata, sidx, step); |
607 | eidx = sidx + PFN_UP(size); |
608 | |
609 | if (sidx >= midx || eidx > midx) |
610 | break; |
611 | |
612 | for (i = sidx; i < eidx; i++) |
613 | if (test_bit(i, bdata->node_bootmem_map)) { |
614 | sidx = align_idx(bdata, i, step); |
615 | if (sidx == i) |
616 | sidx += step; |
617 | goto find_block; |
618 | } |
619 | |
620 | if (bdata->last_end_off & (PAGE_SIZE - 1) && |
621 | PFN_DOWN(bdata->last_end_off) + 1 == sidx) |
622 | start_off = align_off(bdata, bdata->last_end_off, align); |
623 | else |
624 | start_off = PFN_PHYS(sidx); |
625 | |
626 | merge = PFN_DOWN(start_off) < sidx; |
627 | end_off = start_off + size; |
628 | |
629 | bdata->last_end_off = end_off; |
630 | bdata->hint_idx = PFN_UP(end_off); |
631 | |
632 | /* |
633 | * Reserve the area now: |
634 | */ |
635 | if (__reserve(bdata, PFN_DOWN(start_off) + merge, |
636 | PFN_UP(end_off), BOOTMEM_EXCLUSIVE)) |
637 | BUG(); |
638 | |
639 | region = phys_to_virt(PFN_PHYS(bdata->node_min_pfn) + |
640 | start_off); |
641 | memset(region, 0, size); |
642 | /* |
643 | * The min_count is set to 0 so that bootmem allocated blocks |
644 | * are never reported as leaks. |
645 | */ |
646 | kmemleak_alloc(region, size, 0, 0); |
647 | return region; |
648 | } |
649 | |
650 | if (fallback) { |
651 | sidx = align_idx(bdata, fallback - 1, step); |
652 | fallback = 0; |
653 | goto find_block; |
654 | } |
655 | |
656 | return NULL; |
657 | } |
658 | |
659 | static void * __init alloc_arch_preferred_bootmem(bootmem_data_t *bdata, |
660 | unsigned long size, unsigned long align, |
661 | unsigned long goal, unsigned long limit) |
662 | { |
663 | if (WARN_ON_ONCE(slab_is_available())) |
664 | return kzalloc(size, GFP_NOWAIT); |
665 | |
666 | #ifdef CONFIG_HAVE_ARCH_BOOTMEM |
667 | { |
668 | bootmem_data_t *p_bdata; |
669 | |
670 | p_bdata = bootmem_arch_preferred_node(bdata, size, align, |
671 | goal, limit); |
672 | if (p_bdata) |
673 | return alloc_bootmem_core(p_bdata, size, align, |
674 | goal, limit); |
675 | } |
676 | #endif |
677 | return NULL; |
678 | } |
679 | #endif |
680 | |
681 | static void * __init ___alloc_bootmem_nopanic(unsigned long size, |
682 | unsigned long align, |
683 | unsigned long goal, |
684 | unsigned long limit) |
685 | { |
686 | #ifdef CONFIG_NO_BOOTMEM |
687 | void *ptr; |
688 | |
689 | if (WARN_ON_ONCE(slab_is_available())) |
690 | return kzalloc(size, GFP_NOWAIT); |
691 | |
692 | restart: |
693 | |
694 | ptr = __alloc_memory_core_early(MAX_NUMNODES, size, align, goal, limit); |
695 | |
696 | if (ptr) |
697 | return ptr; |
698 | |
699 | if (goal != 0) { |
700 | goal = 0; |
701 | goto restart; |
702 | } |
703 | |
704 | return NULL; |
705 | #else |
706 | bootmem_data_t *bdata; |
707 | void *region; |
708 | |
709 | restart: |
710 | region = alloc_arch_preferred_bootmem(NULL, size, align, goal, limit); |
711 | if (region) |
712 | return region; |
713 | |
714 | list_for_each_entry(bdata, &bdata_list, list) { |
715 | if (goal && bdata->node_low_pfn <= PFN_DOWN(goal)) |
716 | continue; |
717 | if (limit && bdata->node_min_pfn >= PFN_DOWN(limit)) |
718 | break; |
719 | |
720 | region = alloc_bootmem_core(bdata, size, align, goal, limit); |
721 | if (region) |
722 | return region; |
723 | } |
724 | |
725 | if (goal) { |
726 | goal = 0; |
727 | goto restart; |
728 | } |
729 | |
730 | return NULL; |
731 | #endif |
732 | } |
733 | |
734 | /** |
735 | * __alloc_bootmem_nopanic - allocate boot memory without panicking |
736 | * @size: size of the request in bytes |
737 | * @align: alignment of the region |
738 | * @goal: preferred starting address of the region |
739 | * |
740 | * The goal is dropped if it can not be satisfied and the allocation will |
741 | * fall back to memory below @goal. |
742 | * |
743 | * Allocation may happen on any node in the system. |
744 | * |
745 | * Returns NULL on failure. |
746 | */ |
747 | void * __init __alloc_bootmem_nopanic(unsigned long size, unsigned long align, |
748 | unsigned long goal) |
749 | { |
750 | unsigned long limit = 0; |
751 | |
752 | #ifdef CONFIG_NO_BOOTMEM |
753 | limit = -1UL; |
754 | #endif |
755 | |
756 | return ___alloc_bootmem_nopanic(size, align, goal, limit); |
757 | } |
758 | |
759 | static void * __init ___alloc_bootmem(unsigned long size, unsigned long align, |
760 | unsigned long goal, unsigned long limit) |
761 | { |
762 | void *mem = ___alloc_bootmem_nopanic(size, align, goal, limit); |
763 | |
764 | if (mem) |
765 | return mem; |
766 | /* |
767 | * Whoops, we cannot satisfy the allocation request. |
768 | */ |
769 | printk(KERN_ALERT "bootmem alloc of %lu bytes failed!\n", size); |
770 | panic("Out of memory"); |
771 | return NULL; |
772 | } |
773 | |
774 | /** |
775 | * __alloc_bootmem - allocate boot memory |
776 | * @size: size of the request in bytes |
777 | * @align: alignment of the region |
778 | * @goal: preferred starting address of the region |
779 | * |
780 | * The goal is dropped if it can not be satisfied and the allocation will |
781 | * fall back to memory below @goal. |
782 | * |
783 | * Allocation may happen on any node in the system. |
784 | * |
785 | * The function panics if the request can not be satisfied. |
786 | */ |
787 | void * __init __alloc_bootmem(unsigned long size, unsigned long align, |
788 | unsigned long goal) |
789 | { |
790 | unsigned long limit = 0; |
791 | |
792 | #ifdef CONFIG_NO_BOOTMEM |
793 | limit = -1UL; |
794 | #endif |
795 | |
796 | return ___alloc_bootmem(size, align, goal, limit); |
797 | } |
798 | |
799 | #ifndef CONFIG_NO_BOOTMEM |
800 | static void * __init ___alloc_bootmem_node(bootmem_data_t *bdata, |
801 | unsigned long size, unsigned long align, |
802 | unsigned long goal, unsigned long limit) |
803 | { |
804 | void *ptr; |
805 | |
806 | ptr = alloc_arch_preferred_bootmem(bdata, size, align, goal, limit); |
807 | if (ptr) |
808 | return ptr; |
809 | |
810 | ptr = alloc_bootmem_core(bdata, size, align, goal, limit); |
811 | if (ptr) |
812 | return ptr; |
813 | |
814 | return ___alloc_bootmem(size, align, goal, limit); |
815 | } |
816 | #endif |
817 | |
818 | /** |
819 | * __alloc_bootmem_node - allocate boot memory from a specific node |
820 | * @pgdat: node to allocate from |
821 | * @size: size of the request in bytes |
822 | * @align: alignment of the region |
823 | * @goal: preferred starting address of the region |
824 | * |
825 | * The goal is dropped if it can not be satisfied and the allocation will |
826 | * fall back to memory below @goal. |
827 | * |
828 | * Allocation may fall back to any node in the system if the specified node |
829 | * can not hold the requested memory. |
830 | * |
831 | * The function panics if the request can not be satisfied. |
832 | */ |
833 | void * __init __alloc_bootmem_node(pg_data_t *pgdat, unsigned long size, |
834 | unsigned long align, unsigned long goal) |
835 | { |
836 | void *ptr; |
837 | |
838 | if (WARN_ON_ONCE(slab_is_available())) |
839 | return kzalloc_node(size, GFP_NOWAIT, pgdat->node_id); |
840 | |
841 | #ifdef CONFIG_NO_BOOTMEM |
842 | ptr = __alloc_memory_core_early(pgdat->node_id, size, align, |
843 | goal, -1ULL); |
844 | if (ptr) |
845 | return ptr; |
846 | |
847 | ptr = __alloc_memory_core_early(MAX_NUMNODES, size, align, |
848 | goal, -1ULL); |
849 | #else |
850 | ptr = ___alloc_bootmem_node(pgdat->bdata, size, align, goal, 0); |
851 | #endif |
852 | |
853 | return ptr; |
854 | } |
855 | |
856 | void * __init __alloc_bootmem_node_high(pg_data_t *pgdat, unsigned long size, |
857 | unsigned long align, unsigned long goal) |
858 | { |
859 | #ifdef MAX_DMA32_PFN |
860 | unsigned long end_pfn; |
861 | |
862 | if (WARN_ON_ONCE(slab_is_available())) |
863 | return kzalloc_node(size, GFP_NOWAIT, pgdat->node_id); |
864 | |
865 | /* update goal according ...MAX_DMA32_PFN */ |
866 | end_pfn = pgdat->node_start_pfn + pgdat->node_spanned_pages; |
867 | |
868 | if (end_pfn > MAX_DMA32_PFN + (128 >> (20 - PAGE_SHIFT)) && |
869 | (goal >> PAGE_SHIFT) < MAX_DMA32_PFN) { |
870 | void *ptr; |
871 | unsigned long new_goal; |
872 | |
873 | new_goal = MAX_DMA32_PFN << PAGE_SHIFT; |
874 | #ifdef CONFIG_NO_BOOTMEM |
875 | ptr = __alloc_memory_core_early(pgdat->node_id, size, align, |
876 | new_goal, -1ULL); |
877 | #else |
878 | ptr = alloc_bootmem_core(pgdat->bdata, size, align, |
879 | new_goal, 0); |
880 | #endif |
881 | if (ptr) |
882 | return ptr; |
883 | } |
884 | #endif |
885 | |
886 | return __alloc_bootmem_node(pgdat, size, align, goal); |
887 | |
888 | } |
889 | |
890 | #ifdef CONFIG_SPARSEMEM |
891 | /** |
892 | * alloc_bootmem_section - allocate boot memory from a specific section |
893 | * @size: size of the request in bytes |
894 | * @section_nr: sparse map section to allocate from |
895 | * |
896 | * Return NULL on failure. |
897 | */ |
898 | void * __init alloc_bootmem_section(unsigned long size, |
899 | unsigned long section_nr) |
900 | { |
901 | #ifdef CONFIG_NO_BOOTMEM |
902 | unsigned long pfn, goal, limit; |
903 | |
904 | pfn = section_nr_to_pfn(section_nr); |
905 | goal = pfn << PAGE_SHIFT; |
906 | limit = section_nr_to_pfn(section_nr + 1) << PAGE_SHIFT; |
907 | |
908 | return __alloc_memory_core_early(early_pfn_to_nid(pfn), size, |
909 | SMP_CACHE_BYTES, goal, limit); |
910 | #else |
911 | bootmem_data_t *bdata; |
912 | unsigned long pfn, goal, limit; |
913 | |
914 | pfn = section_nr_to_pfn(section_nr); |
915 | goal = pfn << PAGE_SHIFT; |
916 | limit = section_nr_to_pfn(section_nr + 1) << PAGE_SHIFT; |
917 | bdata = &bootmem_node_data[early_pfn_to_nid(pfn)]; |
918 | |
919 | return alloc_bootmem_core(bdata, size, SMP_CACHE_BYTES, goal, limit); |
920 | #endif |
921 | } |
922 | #endif |
923 | |
924 | void * __init __alloc_bootmem_node_nopanic(pg_data_t *pgdat, unsigned long size, |
925 | unsigned long align, unsigned long goal) |
926 | { |
927 | void *ptr; |
928 | |
929 | if (WARN_ON_ONCE(slab_is_available())) |
930 | return kzalloc_node(size, GFP_NOWAIT, pgdat->node_id); |
931 | |
932 | #ifdef CONFIG_NO_BOOTMEM |
933 | ptr = __alloc_memory_core_early(pgdat->node_id, size, align, |
934 | goal, -1ULL); |
935 | #else |
936 | ptr = alloc_arch_preferred_bootmem(pgdat->bdata, size, align, goal, 0); |
937 | if (ptr) |
938 | return ptr; |
939 | |
940 | ptr = alloc_bootmem_core(pgdat->bdata, size, align, goal, 0); |
941 | #endif |
942 | if (ptr) |
943 | return ptr; |
944 | |
945 | return __alloc_bootmem_nopanic(size, align, goal); |
946 | } |
947 | |
948 | #ifndef ARCH_LOW_ADDRESS_LIMIT |
949 | #define ARCH_LOW_ADDRESS_LIMIT 0xffffffffUL |
950 | #endif |
951 | |
952 | /** |
953 | * __alloc_bootmem_low - allocate low boot memory |
954 | * @size: size of the request in bytes |
955 | * @align: alignment of the region |
956 | * @goal: preferred starting address of the region |
957 | * |
958 | * The goal is dropped if it can not be satisfied and the allocation will |
959 | * fall back to memory below @goal. |
960 | * |
961 | * Allocation may happen on any node in the system. |
962 | * |
963 | * The function panics if the request can not be satisfied. |
964 | */ |
965 | void * __init __alloc_bootmem_low(unsigned long size, unsigned long align, |
966 | unsigned long goal) |
967 | { |
968 | return ___alloc_bootmem(size, align, goal, ARCH_LOW_ADDRESS_LIMIT); |
969 | } |
970 | |
971 | /** |
972 | * __alloc_bootmem_low_node - allocate low boot memory from a specific node |
973 | * @pgdat: node to allocate from |
974 | * @size: size of the request in bytes |
975 | * @align: alignment of the region |
976 | * @goal: preferred starting address of the region |
977 | * |
978 | * The goal is dropped if it can not be satisfied and the allocation will |
979 | * fall back to memory below @goal. |
980 | * |
981 | * Allocation may fall back to any node in the system if the specified node |
982 | * can not hold the requested memory. |
983 | * |
984 | * The function panics if the request can not be satisfied. |
985 | */ |
986 | void * __init __alloc_bootmem_low_node(pg_data_t *pgdat, unsigned long size, |
987 | unsigned long align, unsigned long goal) |
988 | { |
989 | void *ptr; |
990 | |
991 | if (WARN_ON_ONCE(slab_is_available())) |
992 | return kzalloc_node(size, GFP_NOWAIT, pgdat->node_id); |
993 | |
994 | #ifdef CONFIG_NO_BOOTMEM |
995 | ptr = __alloc_memory_core_early(pgdat->node_id, size, align, |
996 | goal, ARCH_LOW_ADDRESS_LIMIT); |
997 | if (ptr) |
998 | return ptr; |
999 | ptr = __alloc_memory_core_early(MAX_NUMNODES, size, align, |
1000 | goal, ARCH_LOW_ADDRESS_LIMIT); |
1001 | #else |
1002 | ptr = ___alloc_bootmem_node(pgdat->bdata, size, align, |
1003 | goal, ARCH_LOW_ADDRESS_LIMIT); |
1004 | #endif |
1005 | return ptr; |
1006 | } |
1007 |
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