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1da177e4 1/*
57cfc29e 2 * bootmem - A boot-time physical memory allocator and configurator
1da177e4
LT
3 *
4 * Copyright (C) 1999 Ingo Molnar
57cfc29e
JW
5 * 1999 Kanoj Sarcar, SGI
6 * 2008 Johannes Weiner
1da177e4 7 *
57cfc29e
JW
8 * Access to this subsystem has to be serialized externally (which is true
9 * for the boot process anyway).
1da177e4 10 */
1da177e4 11#include <linux/init.h>
bbc7b92e 12#include <linux/pfn.h>
5a0e3ad6 13#include <linux/slab.h>
1da177e4 14#include <linux/bootmem.h>
b95f1b31 15#include <linux/export.h>
ec3a354b 16#include <linux/kmemleak.h>
08677214 17#include <linux/range.h>
72d7c3b3 18#include <linux/memblock.h>
e786e86a
FBH
19
20#include <asm/bug.h>
1da177e4 21#include <asm/io.h>
dfd54cbc 22#include <asm/processor.h>
e786e86a 23
1da177e4
LT
24#include "internal.h"
25
e782ab42
YL
26#ifndef CONFIG_NEED_MULTIPLE_NODES
27struct pglist_data __refdata contig_page_data = {
28 .bdata = &bootmem_node_data[0]
29};
30EXPORT_SYMBOL(contig_page_data);
31#endif
32
1da177e4
LT
33unsigned long max_low_pfn;
34unsigned long min_low_pfn;
35unsigned long max_pfn;
36
b61bfa3c
JW
37bootmem_data_t bootmem_node_data[MAX_NUMNODES] __initdata;
38
636cc40c
JW
39static struct list_head bdata_list __initdata = LIST_HEAD_INIT(bdata_list);
40
2e5237da
JW
41static int bootmem_debug;
42
43static int __init bootmem_debug_setup(char *buf)
44{
45 bootmem_debug = 1;
46 return 0;
47}
48early_param("bootmem_debug", bootmem_debug_setup);
49
50#define bdebug(fmt, args...) ({ \
51 if (unlikely(bootmem_debug)) \
52 printk(KERN_INFO \
53 "bootmem::%s " fmt, \
80a914dc 54 __func__, ## args); \
2e5237da
JW
55})
56
df049a5f 57static unsigned long __init bootmap_bytes(unsigned long pages)
223e8dc9 58{
9571a982 59 unsigned long bytes = DIV_ROUND_UP(pages, 8);
223e8dc9 60
df049a5f 61 return ALIGN(bytes, sizeof(long));
223e8dc9
JW
62}
63
a66fd7da
JW
64/**
65 * bootmem_bootmap_pages - calculate bitmap size in pages
66 * @pages: number of pages the bitmap has to represent
67 */
f71bf0ca 68unsigned long __init bootmem_bootmap_pages(unsigned long pages)
1da177e4 69{
df049a5f 70 unsigned long bytes = bootmap_bytes(pages);
1da177e4 71
df049a5f 72 return PAGE_ALIGN(bytes) >> PAGE_SHIFT;
1da177e4 73}
f71bf0ca 74
679bc9fb
KH
75/*
76 * link bdata in order
77 */
69d49e68 78static void __init link_bootmem(bootmem_data_t *bdata)
679bc9fb 79{
5c2b8a16 80 bootmem_data_t *ent;
f71bf0ca 81
5c2b8a16
GS
82 list_for_each_entry(ent, &bdata_list, list) {
83 if (bdata->node_min_pfn < ent->node_min_pfn) {
84 list_add_tail(&bdata->list, &ent->list);
85 return;
86 }
679bc9fb 87 }
5c2b8a16
GS
88
89 list_add_tail(&bdata->list, &bdata_list);
679bc9fb
KH
90}
91
1da177e4
LT
92/*
93 * Called once to set up the allocator itself.
94 */
8ae04463 95static unsigned long __init init_bootmem_core(bootmem_data_t *bdata,
1da177e4
LT
96 unsigned long mapstart, unsigned long start, unsigned long end)
97{
bbc7b92e 98 unsigned long mapsize;
1da177e4 99
2dbb51c4 100 mminit_validate_memmodel_limits(&start, &end);
bbc7b92e 101 bdata->node_bootmem_map = phys_to_virt(PFN_PHYS(mapstart));
3560e249 102 bdata->node_min_pfn = start;
1da177e4 103 bdata->node_low_pfn = end;
679bc9fb 104 link_bootmem(bdata);
1da177e4
LT
105
106 /*
107 * Initially all pages are reserved - setup_arch() has to
108 * register free RAM areas explicitly.
109 */
df049a5f 110 mapsize = bootmap_bytes(end - start);
1da177e4
LT
111 memset(bdata->node_bootmem_map, 0xff, mapsize);
112
2e5237da
JW
113 bdebug("nid=%td start=%lx map=%lx end=%lx mapsize=%lx\n",
114 bdata - bootmem_node_data, start, mapstart, end, mapsize);
115
1da177e4
LT
116 return mapsize;
117}
118
a66fd7da
JW
119/**
120 * init_bootmem_node - register a node as boot memory
121 * @pgdat: node to register
122 * @freepfn: pfn where the bitmap for this node is to be placed
123 * @startpfn: first pfn on the node
124 * @endpfn: first pfn after the node
125 *
126 * Returns the number of bytes needed to hold the bitmap for this node.
127 */
223e8dc9
JW
128unsigned long __init init_bootmem_node(pg_data_t *pgdat, unsigned long freepfn,
129 unsigned long startpfn, unsigned long endpfn)
130{
131 return init_bootmem_core(pgdat->bdata, freepfn, startpfn, endpfn);
132}
133
a66fd7da
JW
134/**
135 * init_bootmem - register boot memory
136 * @start: pfn where the bitmap is to be placed
137 * @pages: number of available physical pages
138 *
139 * Returns the number of bytes needed to hold the bitmap.
140 */
223e8dc9
JW
141unsigned long __init init_bootmem(unsigned long start, unsigned long pages)
142{
143 max_low_pfn = pages;
144 min_low_pfn = start;
145 return init_bootmem_core(NODE_DATA(0)->bdata, start, 0, pages);
146}
09325873 147
9f993ac3
FT
148/*
149 * free_bootmem_late - free bootmem pages directly to page allocator
81df9bff 150 * @addr: starting physical address of the range
9f993ac3
FT
151 * @size: size of the range in bytes
152 *
153 * This is only useful when the bootmem allocator has already been torn
154 * down, but we are still initializing the system. Pages are given directly
155 * to the page allocator, no bootmem metadata is updated because it is gone.
156 */
81df9bff 157void __init free_bootmem_late(unsigned long physaddr, unsigned long size)
9f993ac3
FT
158{
159 unsigned long cursor, end;
160
81df9bff 161 kmemleak_free_part(__va(physaddr), size);
9f993ac3 162
81df9bff
JK
163 cursor = PFN_UP(physaddr);
164 end = PFN_DOWN(physaddr + size);
9f993ac3
FT
165
166 for (; cursor < end; cursor++) {
167 __free_pages_bootmem(pfn_to_page(cursor), 0);
168 totalram_pages++;
169 }
170}
171
223e8dc9
JW
172static unsigned long __init free_all_bootmem_core(bootmem_data_t *bdata)
173{
174 struct page *page;
4a099fb4 175 unsigned long *map, start, end, pages, count = 0;
41546c17
JW
176
177 if (!bdata->node_bootmem_map)
178 return 0;
179
4a099fb4 180 map = bdata->node_bootmem_map;
3560e249 181 start = bdata->node_min_pfn;
41546c17
JW
182 end = bdata->node_low_pfn;
183
799f933a
JW
184 bdebug("nid=%td start=%lx end=%lx\n",
185 bdata - bootmem_node_data, start, end);
223e8dc9 186
41546c17 187 while (start < end) {
4a099fb4 188 unsigned long idx, vec;
10d73e65 189 unsigned shift;
223e8dc9 190
3560e249 191 idx = start - bdata->node_min_pfn;
10d73e65
MF
192 shift = idx & (BITS_PER_LONG - 1);
193 /*
194 * vec holds at most BITS_PER_LONG map bits,
195 * bit 0 corresponds to start.
196 */
41546c17 197 vec = ~map[idx / BITS_PER_LONG];
10d73e65
MF
198
199 if (shift) {
200 vec >>= shift;
201 if (end - start >= BITS_PER_LONG)
202 vec |= ~map[idx / BITS_PER_LONG + 1] <<
203 (BITS_PER_LONG - shift);
204 }
799f933a
JW
205 /*
206 * If we have a properly aligned and fully unreserved
207 * BITS_PER_LONG block of pages in front of us, free
208 * it in one go.
209 */
210 if (IS_ALIGNED(start, BITS_PER_LONG) && vec == ~0UL) {
41546c17
JW
211 int order = ilog2(BITS_PER_LONG);
212
213 __free_pages_bootmem(pfn_to_page(start), order);
223e8dc9 214 count += BITS_PER_LONG;
799f933a 215 start += BITS_PER_LONG;
41546c17 216 } else {
10d73e65 217 unsigned long cur = start;
41546c17 218
10d73e65
MF
219 start = ALIGN(start + 1, BITS_PER_LONG);
220 while (vec && cur != start) {
41546c17 221 if (vec & 1) {
10d73e65 222 page = pfn_to_page(cur);
223e8dc9 223 __free_pages_bootmem(page, 0);
41546c17 224 count++;
223e8dc9 225 }
41546c17 226 vec >>= 1;
10d73e65 227 ++cur;
223e8dc9 228 }
223e8dc9 229 }
223e8dc9
JW
230 }
231
223e8dc9 232 page = virt_to_page(bdata->node_bootmem_map);
3560e249 233 pages = bdata->node_low_pfn - bdata->node_min_pfn;
41546c17
JW
234 pages = bootmem_bootmap_pages(pages);
235 count += pages;
5576646f 236 while (pages--)
41546c17 237 __free_pages_bootmem(page++, 0);
223e8dc9 238
2e5237da
JW
239 bdebug("nid=%td released=%lx\n", bdata - bootmem_node_data, count);
240
223e8dc9
JW
241 return count;
242}
243
7b4b2a0d
JL
244static int reset_managed_pages_done __initdata;
245
246static inline void __init reset_node_managed_pages(pg_data_t *pgdat)
9feedc9d
JL
247{
248 struct zone *z;
249
7b4b2a0d
JL
250 if (reset_managed_pages_done)
251 return;
252
9feedc9d 253 for (z = pgdat->node_zones; z < pgdat->node_zones + MAX_NR_ZONES; z++)
7b4b2a0d
JL
254 z->managed_pages = 0;
255}
256
257void __init reset_all_zones_managed_pages(void)
258{
259 struct pglist_data *pgdat;
260
261 for_each_online_pgdat(pgdat)
262 reset_node_managed_pages(pgdat);
263 reset_managed_pages_done = 1;
9feedc9d
JL
264}
265
a66fd7da
JW
266/**
267 * free_all_bootmem - release free pages to the buddy allocator
268 *
269 * Returns the number of pages actually released.
270 */
223e8dc9
JW
271unsigned long __init free_all_bootmem(void)
272{
aa235fc7
YL
273 unsigned long total_pages = 0;
274 bootmem_data_t *bdata;
9feedc9d 275
7b4b2a0d 276 reset_all_zones_managed_pages();
aa235fc7
YL
277
278 list_for_each_entry(bdata, &bdata_list, list)
279 total_pages += free_all_bootmem_core(bdata);
280
0c988534
JL
281 totalram_pages += total_pages;
282
aa235fc7 283 return total_pages;
223e8dc9
JW
284}
285
d747fa4b
JW
286static void __init __free(bootmem_data_t *bdata,
287 unsigned long sidx, unsigned long eidx)
288{
289 unsigned long idx;
290
291 bdebug("nid=%td start=%lx end=%lx\n", bdata - bootmem_node_data,
3560e249
JW
292 sidx + bdata->node_min_pfn,
293 eidx + bdata->node_min_pfn);
d747fa4b 294
e2bf3cae
JW
295 if (bdata->hint_idx > sidx)
296 bdata->hint_idx = sidx;
297
d747fa4b
JW
298 for (idx = sidx; idx < eidx; idx++)
299 if (!test_and_clear_bit(idx, bdata->node_bootmem_map))
300 BUG();
301}
302
303static int __init __reserve(bootmem_data_t *bdata, unsigned long sidx,
304 unsigned long eidx, int flags)
305{
306 unsigned long idx;
307 int exclusive = flags & BOOTMEM_EXCLUSIVE;
308
309 bdebug("nid=%td start=%lx end=%lx flags=%x\n",
310 bdata - bootmem_node_data,
3560e249
JW
311 sidx + bdata->node_min_pfn,
312 eidx + bdata->node_min_pfn,
d747fa4b
JW
313 flags);
314
315 for (idx = sidx; idx < eidx; idx++)
316 if (test_and_set_bit(idx, bdata->node_bootmem_map)) {
317 if (exclusive) {
318 __free(bdata, sidx, idx);
319 return -EBUSY;
320 }
321 bdebug("silent double reserve of PFN %lx\n",
3560e249 322 idx + bdata->node_min_pfn);
d747fa4b
JW
323 }
324 return 0;
325}
326
e2bf3cae
JW
327static int __init mark_bootmem_node(bootmem_data_t *bdata,
328 unsigned long start, unsigned long end,
329 int reserve, int flags)
223e8dc9
JW
330{
331 unsigned long sidx, eidx;
223e8dc9 332
e2bf3cae
JW
333 bdebug("nid=%td start=%lx end=%lx reserve=%d flags=%x\n",
334 bdata - bootmem_node_data, start, end, reserve, flags);
223e8dc9 335
3560e249 336 BUG_ON(start < bdata->node_min_pfn);
e2bf3cae 337 BUG_ON(end > bdata->node_low_pfn);
223e8dc9 338
3560e249
JW
339 sidx = start - bdata->node_min_pfn;
340 eidx = end - bdata->node_min_pfn;
223e8dc9 341
e2bf3cae
JW
342 if (reserve)
343 return __reserve(bdata, sidx, eidx, flags);
223e8dc9 344 else
e2bf3cae
JW
345 __free(bdata, sidx, eidx);
346 return 0;
347}
348
349static int __init mark_bootmem(unsigned long start, unsigned long end,
350 int reserve, int flags)
351{
352 unsigned long pos;
353 bootmem_data_t *bdata;
354
355 pos = start;
356 list_for_each_entry(bdata, &bdata_list, list) {
357 int err;
358 unsigned long max;
359
3560e249
JW
360 if (pos < bdata->node_min_pfn ||
361 pos >= bdata->node_low_pfn) {
e2bf3cae
JW
362 BUG_ON(pos != start);
363 continue;
364 }
365
366 max = min(bdata->node_low_pfn, end);
223e8dc9 367
e2bf3cae
JW
368 err = mark_bootmem_node(bdata, pos, max, reserve, flags);
369 if (reserve && err) {
370 mark_bootmem(start, pos, 0, 0);
371 return err;
372 }
223e8dc9 373
e2bf3cae
JW
374 if (max == end)
375 return 0;
376 pos = bdata->node_low_pfn;
377 }
378 BUG();
223e8dc9
JW
379}
380
a66fd7da
JW
381/**
382 * free_bootmem_node - mark a page range as usable
383 * @pgdat: node the range resides on
384 * @physaddr: starting address of the range
385 * @size: size of the range in bytes
386 *
387 * Partial pages will be considered reserved and left as they are.
388 *
e2bf3cae 389 * The range must reside completely on the specified node.
a66fd7da 390 */
223e8dc9
JW
391void __init free_bootmem_node(pg_data_t *pgdat, unsigned long physaddr,
392 unsigned long size)
393{
e2bf3cae
JW
394 unsigned long start, end;
395
ec3a354b
CM
396 kmemleak_free_part(__va(physaddr), size);
397
e2bf3cae
JW
398 start = PFN_UP(physaddr);
399 end = PFN_DOWN(physaddr + size);
400
401 mark_bootmem_node(pgdat->bdata, start, end, 0, 0);
223e8dc9
JW
402}
403
a66fd7da
JW
404/**
405 * free_bootmem - mark a page range as usable
81df9bff 406 * @addr: starting physical address of the range
a66fd7da
JW
407 * @size: size of the range in bytes
408 *
409 * Partial pages will be considered reserved and left as they are.
410 *
e2bf3cae 411 * The range must be contiguous but may span node boundaries.
a66fd7da 412 */
81df9bff 413void __init free_bootmem(unsigned long physaddr, unsigned long size)
223e8dc9 414{
e2bf3cae 415 unsigned long start, end;
a5645a61 416
81df9bff 417 kmemleak_free_part(__va(physaddr), size);
ec3a354b 418
81df9bff
JK
419 start = PFN_UP(physaddr);
420 end = PFN_DOWN(physaddr + size);
1da177e4 421
e2bf3cae 422 mark_bootmem(start, end, 0, 0);
1da177e4
LT
423}
424
a66fd7da
JW
425/**
426 * reserve_bootmem_node - mark a page range as reserved
427 * @pgdat: node the range resides on
428 * @physaddr: starting address of the range
429 * @size: size of the range in bytes
430 * @flags: reservation flags (see linux/bootmem.h)
431 *
432 * Partial pages will be reserved.
433 *
e2bf3cae 434 * The range must reside completely on the specified node.
a66fd7da 435 */
223e8dc9
JW
436int __init reserve_bootmem_node(pg_data_t *pgdat, unsigned long physaddr,
437 unsigned long size, int flags)
1da177e4 438{
e2bf3cae 439 unsigned long start, end;
1da177e4 440
e2bf3cae
JW
441 start = PFN_DOWN(physaddr);
442 end = PFN_UP(physaddr + size);
443
444 return mark_bootmem_node(pgdat->bdata, start, end, 1, flags);
223e8dc9 445}
5a982cbc 446
a66fd7da 447/**
0d4ba4d7 448 * reserve_bootmem - mark a page range as reserved
a66fd7da
JW
449 * @addr: starting address of the range
450 * @size: size of the range in bytes
451 * @flags: reservation flags (see linux/bootmem.h)
452 *
453 * Partial pages will be reserved.
454 *
e2bf3cae 455 * The range must be contiguous but may span node boundaries.
a66fd7da 456 */
223e8dc9
JW
457int __init reserve_bootmem(unsigned long addr, unsigned long size,
458 int flags)
459{
e2bf3cae 460 unsigned long start, end;
1da177e4 461
e2bf3cae
JW
462 start = PFN_DOWN(addr);
463 end = PFN_UP(addr + size);
223e8dc9 464
e2bf3cae 465 return mark_bootmem(start, end, 1, flags);
1da177e4
LT
466}
467
8aa043d7
JB
468static unsigned long __init align_idx(struct bootmem_data *bdata,
469 unsigned long idx, unsigned long step)
481ebd0d
JW
470{
471 unsigned long base = bdata->node_min_pfn;
472
473 /*
474 * Align the index with respect to the node start so that the
475 * combination of both satisfies the requested alignment.
476 */
477
478 return ALIGN(base + idx, step) - base;
479}
480
8aa043d7
JB
481static unsigned long __init align_off(struct bootmem_data *bdata,
482 unsigned long off, unsigned long align)
481ebd0d
JW
483{
484 unsigned long base = PFN_PHYS(bdata->node_min_pfn);
485
486 /* Same as align_idx for byte offsets */
487
488 return ALIGN(base + off, align) - base;
489}
490
c6785b6b 491static void * __init alloc_bootmem_bdata(struct bootmem_data *bdata,
d0c4f570
TH
492 unsigned long size, unsigned long align,
493 unsigned long goal, unsigned long limit)
1da177e4 494{
0f3caba2 495 unsigned long fallback = 0;
5f2809e6
JW
496 unsigned long min, max, start, sidx, midx, step;
497
594fe1a0
JW
498 bdebug("nid=%td size=%lx [%lu pages] align=%lx goal=%lx limit=%lx\n",
499 bdata - bootmem_node_data, size, PAGE_ALIGN(size) >> PAGE_SHIFT,
500 align, goal, limit);
501
5f2809e6
JW
502 BUG_ON(!size);
503 BUG_ON(align & (align - 1));
504 BUG_ON(limit && goal + size > limit);
1da177e4 505
7c309a64
CK
506 if (!bdata->node_bootmem_map)
507 return NULL;
508
3560e249 509 min = bdata->node_min_pfn;
5f2809e6 510 max = bdata->node_low_pfn;
9a2dc04c 511
5f2809e6
JW
512 goal >>= PAGE_SHIFT;
513 limit >>= PAGE_SHIFT;
514
515 if (limit && max > limit)
516 max = limit;
517 if (max <= min)
9a2dc04c
YL
518 return NULL;
519
5f2809e6 520 step = max(align >> PAGE_SHIFT, 1UL);
281dd25c 521
5f2809e6
JW
522 if (goal && min < goal && goal < max)
523 start = ALIGN(goal, step);
524 else
525 start = ALIGN(min, step);
1da177e4 526
481ebd0d 527 sidx = start - bdata->node_min_pfn;
3560e249 528 midx = max - bdata->node_min_pfn;
1da177e4 529
5f2809e6 530 if (bdata->hint_idx > sidx) {
0f3caba2
JW
531 /*
532 * Handle the valid case of sidx being zero and still
533 * catch the fallback below.
534 */
535 fallback = sidx + 1;
481ebd0d 536 sidx = align_idx(bdata, bdata->hint_idx, step);
5f2809e6 537 }
1da177e4 538
5f2809e6
JW
539 while (1) {
540 int merge;
541 void *region;
542 unsigned long eidx, i, start_off, end_off;
543find_block:
544 sidx = find_next_zero_bit(bdata->node_bootmem_map, midx, sidx);
481ebd0d 545 sidx = align_idx(bdata, sidx, step);
5f2809e6 546 eidx = sidx + PFN_UP(size);
ad09315c 547
5f2809e6 548 if (sidx >= midx || eidx > midx)
66d43e98 549 break;
1da177e4 550
5f2809e6
JW
551 for (i = sidx; i < eidx; i++)
552 if (test_bit(i, bdata->node_bootmem_map)) {
481ebd0d 553 sidx = align_idx(bdata, i, step);
5f2809e6
JW
554 if (sidx == i)
555 sidx += step;
556 goto find_block;
557 }
1da177e4 558
627240aa 559 if (bdata->last_end_off & (PAGE_SIZE - 1) &&
5f2809e6 560 PFN_DOWN(bdata->last_end_off) + 1 == sidx)
481ebd0d 561 start_off = align_off(bdata, bdata->last_end_off, align);
5f2809e6
JW
562 else
563 start_off = PFN_PHYS(sidx);
564
565 merge = PFN_DOWN(start_off) < sidx;
566 end_off = start_off + size;
567
568 bdata->last_end_off = end_off;
569 bdata->hint_idx = PFN_UP(end_off);
570
571 /*
572 * Reserve the area now:
573 */
d747fa4b
JW
574 if (__reserve(bdata, PFN_DOWN(start_off) + merge,
575 PFN_UP(end_off), BOOTMEM_EXCLUSIVE))
576 BUG();
5f2809e6 577
3560e249
JW
578 region = phys_to_virt(PFN_PHYS(bdata->node_min_pfn) +
579 start_off);
5f2809e6 580 memset(region, 0, size);
008139d9
CM
581 /*
582 * The min_count is set to 0 so that bootmem allocated blocks
583 * are never reported as leaks.
584 */
585 kmemleak_alloc(region, size, 0, 0);
5f2809e6 586 return region;
1da177e4
LT
587 }
588
0f3caba2 589 if (fallback) {
481ebd0d 590 sidx = align_idx(bdata, fallback - 1, step);
0f3caba2
JW
591 fallback = 0;
592 goto find_block;
593 }
594
595 return NULL;
596}
597
c12ab504 598static void * __init alloc_bootmem_core(unsigned long size,
0f3caba2
JW
599 unsigned long align,
600 unsigned long goal,
601 unsigned long limit)
602{
603 bootmem_data_t *bdata;
d0c4f570 604 void *region;
0f3caba2 605
3f7dfe24
JK
606 if (WARN_ON_ONCE(slab_is_available()))
607 return kzalloc(size, GFP_NOWAIT);
0f3caba2 608
d0c4f570 609 list_for_each_entry(bdata, &bdata_list, list) {
0f3caba2
JW
610 if (goal && bdata->node_low_pfn <= PFN_DOWN(goal))
611 continue;
3560e249 612 if (limit && bdata->node_min_pfn >= PFN_DOWN(limit))
0f3caba2
JW
613 break;
614
c6785b6b 615 region = alloc_bootmem_bdata(bdata, size, align, goal, limit);
0f3caba2
JW
616 if (region)
617 return region;
618 }
619
c12ab504
JW
620 return NULL;
621}
622
623static void * __init ___alloc_bootmem_nopanic(unsigned long size,
624 unsigned long align,
625 unsigned long goal,
626 unsigned long limit)
627{
628 void *ptr;
629
630restart:
631 ptr = alloc_bootmem_core(size, align, goal, limit);
632 if (ptr)
633 return ptr;
5f2809e6
JW
634 if (goal) {
635 goal = 0;
0f3caba2 636 goto restart;
5f2809e6 637 }
2e5237da 638
5f2809e6 639 return NULL;
1da177e4
LT
640}
641
a66fd7da
JW
642/**
643 * __alloc_bootmem_nopanic - allocate boot memory without panicking
644 * @size: size of the request in bytes
645 * @align: alignment of the region
646 * @goal: preferred starting address of the region
647 *
648 * The goal is dropped if it can not be satisfied and the allocation will
649 * fall back to memory below @goal.
650 *
651 * Allocation may happen on any node in the system.
652 *
653 * Returns NULL on failure.
654 */
bb0923a6 655void * __init __alloc_bootmem_nopanic(unsigned long size, unsigned long align,
0f3caba2 656 unsigned long goal)
1da177e4 657{
08677214
YL
658 unsigned long limit = 0;
659
08677214 660 return ___alloc_bootmem_nopanic(size, align, goal, limit);
0f3caba2 661}
1da177e4 662
0f3caba2
JW
663static void * __init ___alloc_bootmem(unsigned long size, unsigned long align,
664 unsigned long goal, unsigned long limit)
665{
666 void *mem = ___alloc_bootmem_nopanic(size, align, goal, limit);
667
668 if (mem)
669 return mem;
670 /*
671 * Whoops, we cannot satisfy the allocation request.
672 */
673 printk(KERN_ALERT "bootmem alloc of %lu bytes failed!\n", size);
674 panic("Out of memory");
a8062231
AK
675 return NULL;
676}
1da177e4 677
a66fd7da
JW
678/**
679 * __alloc_bootmem - allocate boot memory
680 * @size: size of the request in bytes
681 * @align: alignment of the region
682 * @goal: preferred starting address of the region
683 *
684 * The goal is dropped if it can not be satisfied and the allocation will
685 * fall back to memory below @goal.
686 *
687 * Allocation may happen on any node in the system.
688 *
689 * The function panics if the request can not be satisfied.
690 */
bb0923a6
FBH
691void * __init __alloc_bootmem(unsigned long size, unsigned long align,
692 unsigned long goal)
a8062231 693{
08677214
YL
694 unsigned long limit = 0;
695
08677214 696 return ___alloc_bootmem(size, align, goal, limit);
1da177e4
LT
697}
698
99ab7b19 699void * __init ___alloc_bootmem_node_nopanic(pg_data_t *pgdat,
4cc278b7
JW
700 unsigned long size, unsigned long align,
701 unsigned long goal, unsigned long limit)
702{
703 void *ptr;
704
3f7dfe24
JK
705 if (WARN_ON_ONCE(slab_is_available()))
706 return kzalloc(size, GFP_NOWAIT);
ab381843 707again:
d0c4f570 708
c8f4a2d0
YL
709 /* do not panic in alloc_bootmem_bdata() */
710 if (limit && goal + size > limit)
711 limit = 0;
712
e9079911 713 ptr = alloc_bootmem_bdata(pgdat->bdata, size, align, goal, limit);
4cc278b7
JW
714 if (ptr)
715 return ptr;
716
ab381843
JW
717 ptr = alloc_bootmem_core(size, align, goal, limit);
718 if (ptr)
719 return ptr;
720
721 if (goal) {
722 goal = 0;
723 goto again;
724 }
725
421456ed
JW
726 return NULL;
727}
728
729void * __init __alloc_bootmem_node_nopanic(pg_data_t *pgdat, unsigned long size,
730 unsigned long align, unsigned long goal)
731{
732 if (WARN_ON_ONCE(slab_is_available()))
733 return kzalloc_node(size, GFP_NOWAIT, pgdat->node_id);
734
e9079911 735 return ___alloc_bootmem_node_nopanic(pgdat, size, align, goal, 0);
421456ed
JW
736}
737
e9079911 738void * __init ___alloc_bootmem_node(pg_data_t *pgdat, unsigned long size,
421456ed
JW
739 unsigned long align, unsigned long goal,
740 unsigned long limit)
741{
742 void *ptr;
743
e9079911 744 ptr = ___alloc_bootmem_node_nopanic(pgdat, size, align, goal, 0);
421456ed
JW
745 if (ptr)
746 return ptr;
747
ab381843
JW
748 printk(KERN_ALERT "bootmem alloc of %lu bytes failed!\n", size);
749 panic("Out of memory");
750 return NULL;
4cc278b7
JW
751}
752
a66fd7da
JW
753/**
754 * __alloc_bootmem_node - allocate boot memory from a specific node
755 * @pgdat: node to allocate from
756 * @size: size of the request in bytes
757 * @align: alignment of the region
758 * @goal: preferred starting address of the region
759 *
760 * The goal is dropped if it can not be satisfied and the allocation will
761 * fall back to memory below @goal.
762 *
763 * Allocation may fall back to any node in the system if the specified node
764 * can not hold the requested memory.
765 *
766 * The function panics if the request can not be satisfied.
767 */
bb0923a6
FBH
768void * __init __alloc_bootmem_node(pg_data_t *pgdat, unsigned long size,
769 unsigned long align, unsigned long goal)
1da177e4 770{
c91c4773
PE
771 if (WARN_ON_ONCE(slab_is_available()))
772 return kzalloc_node(size, GFP_NOWAIT, pgdat->node_id);
773
e9079911 774 return ___alloc_bootmem_node(pgdat, size, align, goal, 0);
08677214
YL
775}
776
777void * __init __alloc_bootmem_node_high(pg_data_t *pgdat, unsigned long size,
778 unsigned long align, unsigned long goal)
779{
780#ifdef MAX_DMA32_PFN
781 unsigned long end_pfn;
782
783 if (WARN_ON_ONCE(slab_is_available()))
784 return kzalloc_node(size, GFP_NOWAIT, pgdat->node_id);
785
786 /* update goal according ...MAX_DMA32_PFN */
83285c72 787 end_pfn = pgdat_end_pfn(pgdat);
08677214
YL
788
789 if (end_pfn > MAX_DMA32_PFN + (128 >> (20 - PAGE_SHIFT)) &&
790 (goal >> PAGE_SHIFT) < MAX_DMA32_PFN) {
791 void *ptr;
792 unsigned long new_goal;
793
794 new_goal = MAX_DMA32_PFN << PAGE_SHIFT;
c6785b6b 795 ptr = alloc_bootmem_bdata(pgdat->bdata, size, align,
08677214 796 new_goal, 0);
08677214
YL
797 if (ptr)
798 return ptr;
799 }
800#endif
801
802 return __alloc_bootmem_node(pgdat, size, align, goal);
803
1da177e4
LT
804}
805
dfd54cbc
HC
806#ifndef ARCH_LOW_ADDRESS_LIMIT
807#define ARCH_LOW_ADDRESS_LIMIT 0xffffffffUL
808#endif
008857c1 809
a66fd7da
JW
810/**
811 * __alloc_bootmem_low - allocate low boot memory
812 * @size: size of the request in bytes
813 * @align: alignment of the region
814 * @goal: preferred starting address of the region
815 *
816 * The goal is dropped if it can not be satisfied and the allocation will
817 * fall back to memory below @goal.
818 *
819 * Allocation may happen on any node in the system.
820 *
821 * The function panics if the request can not be satisfied.
822 */
bb0923a6
FBH
823void * __init __alloc_bootmem_low(unsigned long size, unsigned long align,
824 unsigned long goal)
008857c1 825{
0f3caba2 826 return ___alloc_bootmem(size, align, goal, ARCH_LOW_ADDRESS_LIMIT);
008857c1
RT
827}
828
38fa4175
YL
829void * __init __alloc_bootmem_low_nopanic(unsigned long size,
830 unsigned long align,
831 unsigned long goal)
832{
833 return ___alloc_bootmem_nopanic(size, align, goal,
834 ARCH_LOW_ADDRESS_LIMIT);
835}
836
a66fd7da
JW
837/**
838 * __alloc_bootmem_low_node - allocate low boot memory from a specific node
839 * @pgdat: node to allocate from
840 * @size: size of the request in bytes
841 * @align: alignment of the region
842 * @goal: preferred starting address of the region
843 *
844 * The goal is dropped if it can not be satisfied and the allocation will
845 * fall back to memory below @goal.
846 *
847 * Allocation may fall back to any node in the system if the specified node
848 * can not hold the requested memory.
849 *
850 * The function panics if the request can not be satisfied.
851 */
008857c1
RT
852void * __init __alloc_bootmem_low_node(pg_data_t *pgdat, unsigned long size,
853 unsigned long align, unsigned long goal)
854{
c91c4773
PE
855 if (WARN_ON_ONCE(slab_is_available()))
856 return kzalloc_node(size, GFP_NOWAIT, pgdat->node_id);
857
e9079911
JW
858 return ___alloc_bootmem_node(pgdat, size, align,
859 goal, ARCH_LOW_ADDRESS_LIMIT);
008857c1 860}