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Commit | Line | Data |
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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 |
27 | struct pglist_data __refdata contig_page_data = { | |
28 | .bdata = &bootmem_node_data[0] | |
29 | }; | |
30 | EXPORT_SYMBOL(contig_page_data); | |
31 | #endif | |
32 | ||
1da177e4 LT |
33 | unsigned long max_low_pfn; |
34 | unsigned long min_low_pfn; | |
35 | unsigned long max_pfn; | |
36 | ||
b61bfa3c JW |
37 | bootmem_data_t bootmem_node_data[MAX_NUMNODES] __initdata; |
38 | ||
636cc40c JW |
39 | static struct list_head bdata_list __initdata = LIST_HEAD_INIT(bdata_list); |
40 | ||
2e5237da JW |
41 | static int bootmem_debug; |
42 | ||
43 | static int __init bootmem_debug_setup(char *buf) | |
44 | { | |
45 | bootmem_debug = 1; | |
46 | return 0; | |
47 | } | |
48 | early_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 | 57 | static 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 | 68 | unsigned 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 | 78 | static void __init link_bootmem(bootmem_data_t *bdata) |
679bc9fb | 79 | { |
636cc40c | 80 | struct list_head *iter; |
f71bf0ca | 81 | |
636cc40c JW |
82 | list_for_each(iter, &bdata_list) { |
83 | bootmem_data_t *ent; | |
84 | ||
85 | ent = list_entry(iter, bootmem_data_t, list); | |
3560e249 | 86 | if (bdata->node_min_pfn < ent->node_min_pfn) |
636cc40c | 87 | break; |
679bc9fb | 88 | } |
636cc40c | 89 | list_add_tail(&bdata->list, iter); |
679bc9fb KH |
90 | } |
91 | ||
1da177e4 LT |
92 | /* |
93 | * Called once to set up the allocator itself. | |
94 | */ | |
8ae04463 | 95 | static 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 |
128 | unsigned 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 |
141 | unsigned 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 | |
150 | * @addr: starting address of the range | |
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 | */ | |
157 | void __init free_bootmem_late(unsigned long addr, unsigned long size) | |
158 | { | |
159 | unsigned long cursor, end; | |
160 | ||
161 | kmemleak_free_part(__va(addr), size); | |
162 | ||
163 | cursor = PFN_UP(addr); | |
164 | end = PFN_DOWN(addr + size); | |
165 | ||
166 | for (; cursor < end; cursor++) { | |
167 | __free_pages_bootmem(pfn_to_page(cursor), 0); | |
168 | totalram_pages++; | |
169 | } | |
170 | } | |
171 | ||
223e8dc9 JW |
172 | static unsigned long __init free_all_bootmem_core(bootmem_data_t *bdata) |
173 | { | |
174 | struct page *page; | |
41546c17 JW |
175 | unsigned long start, end, pages, count = 0; |
176 | ||
177 | if (!bdata->node_bootmem_map) | |
178 | return 0; | |
179 | ||
3560e249 | 180 | start = bdata->node_min_pfn; |
41546c17 JW |
181 | end = bdata->node_low_pfn; |
182 | ||
799f933a JW |
183 | bdebug("nid=%td start=%lx end=%lx\n", |
184 | bdata - bootmem_node_data, start, end); | |
223e8dc9 | 185 | |
41546c17 JW |
186 | while (start < end) { |
187 | unsigned long *map, idx, vec; | |
223e8dc9 | 188 | |
41546c17 | 189 | map = bdata->node_bootmem_map; |
3560e249 | 190 | idx = start - bdata->node_min_pfn; |
41546c17 | 191 | vec = ~map[idx / BITS_PER_LONG]; |
799f933a JW |
192 | /* |
193 | * If we have a properly aligned and fully unreserved | |
194 | * BITS_PER_LONG block of pages in front of us, free | |
195 | * it in one go. | |
196 | */ | |
197 | if (IS_ALIGNED(start, BITS_PER_LONG) && vec == ~0UL) { | |
41546c17 JW |
198 | int order = ilog2(BITS_PER_LONG); |
199 | ||
200 | __free_pages_bootmem(pfn_to_page(start), order); | |
223e8dc9 | 201 | count += BITS_PER_LONG; |
799f933a | 202 | start += BITS_PER_LONG; |
41546c17 JW |
203 | } else { |
204 | unsigned long off = 0; | |
205 | ||
206 | while (vec && off < BITS_PER_LONG) { | |
207 | if (vec & 1) { | |
208 | page = pfn_to_page(start + off); | |
223e8dc9 | 209 | __free_pages_bootmem(page, 0); |
41546c17 | 210 | count++; |
223e8dc9 | 211 | } |
41546c17 JW |
212 | vec >>= 1; |
213 | off++; | |
223e8dc9 | 214 | } |
799f933a | 215 | start = ALIGN(start + 1, BITS_PER_LONG); |
223e8dc9 | 216 | } |
223e8dc9 JW |
217 | } |
218 | ||
223e8dc9 | 219 | page = virt_to_page(bdata->node_bootmem_map); |
3560e249 | 220 | pages = bdata->node_low_pfn - bdata->node_min_pfn; |
41546c17 JW |
221 | pages = bootmem_bootmap_pages(pages); |
222 | count += pages; | |
223 | while (pages--) | |
224 | __free_pages_bootmem(page++, 0); | |
223e8dc9 | 225 | |
2e5237da JW |
226 | bdebug("nid=%td released=%lx\n", bdata - bootmem_node_data, count); |
227 | ||
223e8dc9 JW |
228 | return count; |
229 | } | |
230 | ||
a66fd7da JW |
231 | /** |
232 | * free_all_bootmem_node - release a node's free pages to the buddy allocator | |
233 | * @pgdat: node to be released | |
234 | * | |
235 | * Returns the number of pages actually released. | |
236 | */ | |
223e8dc9 JW |
237 | unsigned long __init free_all_bootmem_node(pg_data_t *pgdat) |
238 | { | |
239 | register_page_bootmem_info_node(pgdat); | |
240 | return free_all_bootmem_core(pgdat->bdata); | |
241 | } | |
242 | ||
a66fd7da JW |
243 | /** |
244 | * free_all_bootmem - release free pages to the buddy allocator | |
245 | * | |
246 | * Returns the number of pages actually released. | |
247 | */ | |
223e8dc9 JW |
248 | unsigned long __init free_all_bootmem(void) |
249 | { | |
aa235fc7 YL |
250 | unsigned long total_pages = 0; |
251 | bootmem_data_t *bdata; | |
252 | ||
253 | list_for_each_entry(bdata, &bdata_list, list) | |
254 | total_pages += free_all_bootmem_core(bdata); | |
255 | ||
256 | return total_pages; | |
223e8dc9 JW |
257 | } |
258 | ||
d747fa4b JW |
259 | static void __init __free(bootmem_data_t *bdata, |
260 | unsigned long sidx, unsigned long eidx) | |
261 | { | |
262 | unsigned long idx; | |
263 | ||
264 | bdebug("nid=%td start=%lx end=%lx\n", bdata - bootmem_node_data, | |
3560e249 JW |
265 | sidx + bdata->node_min_pfn, |
266 | eidx + bdata->node_min_pfn); | |
d747fa4b | 267 | |
e2bf3cae JW |
268 | if (bdata->hint_idx > sidx) |
269 | bdata->hint_idx = sidx; | |
270 | ||
d747fa4b JW |
271 | for (idx = sidx; idx < eidx; idx++) |
272 | if (!test_and_clear_bit(idx, bdata->node_bootmem_map)) | |
273 | BUG(); | |
274 | } | |
275 | ||
276 | static int __init __reserve(bootmem_data_t *bdata, unsigned long sidx, | |
277 | unsigned long eidx, int flags) | |
278 | { | |
279 | unsigned long idx; | |
280 | int exclusive = flags & BOOTMEM_EXCLUSIVE; | |
281 | ||
282 | bdebug("nid=%td start=%lx end=%lx flags=%x\n", | |
283 | bdata - bootmem_node_data, | |
3560e249 JW |
284 | sidx + bdata->node_min_pfn, |
285 | eidx + bdata->node_min_pfn, | |
d747fa4b JW |
286 | flags); |
287 | ||
288 | for (idx = sidx; idx < eidx; idx++) | |
289 | if (test_and_set_bit(idx, bdata->node_bootmem_map)) { | |
290 | if (exclusive) { | |
291 | __free(bdata, sidx, idx); | |
292 | return -EBUSY; | |
293 | } | |
294 | bdebug("silent double reserve of PFN %lx\n", | |
3560e249 | 295 | idx + bdata->node_min_pfn); |
d747fa4b JW |
296 | } |
297 | return 0; | |
298 | } | |
299 | ||
e2bf3cae JW |
300 | static int __init mark_bootmem_node(bootmem_data_t *bdata, |
301 | unsigned long start, unsigned long end, | |
302 | int reserve, int flags) | |
223e8dc9 JW |
303 | { |
304 | unsigned long sidx, eidx; | |
223e8dc9 | 305 | |
e2bf3cae JW |
306 | bdebug("nid=%td start=%lx end=%lx reserve=%d flags=%x\n", |
307 | bdata - bootmem_node_data, start, end, reserve, flags); | |
223e8dc9 | 308 | |
3560e249 | 309 | BUG_ON(start < bdata->node_min_pfn); |
e2bf3cae | 310 | BUG_ON(end > bdata->node_low_pfn); |
223e8dc9 | 311 | |
3560e249 JW |
312 | sidx = start - bdata->node_min_pfn; |
313 | eidx = end - bdata->node_min_pfn; | |
223e8dc9 | 314 | |
e2bf3cae JW |
315 | if (reserve) |
316 | return __reserve(bdata, sidx, eidx, flags); | |
223e8dc9 | 317 | else |
e2bf3cae JW |
318 | __free(bdata, sidx, eidx); |
319 | return 0; | |
320 | } | |
321 | ||
322 | static int __init mark_bootmem(unsigned long start, unsigned long end, | |
323 | int reserve, int flags) | |
324 | { | |
325 | unsigned long pos; | |
326 | bootmem_data_t *bdata; | |
327 | ||
328 | pos = start; | |
329 | list_for_each_entry(bdata, &bdata_list, list) { | |
330 | int err; | |
331 | unsigned long max; | |
332 | ||
3560e249 JW |
333 | if (pos < bdata->node_min_pfn || |
334 | pos >= bdata->node_low_pfn) { | |
e2bf3cae JW |
335 | BUG_ON(pos != start); |
336 | continue; | |
337 | } | |
338 | ||
339 | max = min(bdata->node_low_pfn, end); | |
223e8dc9 | 340 | |
e2bf3cae JW |
341 | err = mark_bootmem_node(bdata, pos, max, reserve, flags); |
342 | if (reserve && err) { | |
343 | mark_bootmem(start, pos, 0, 0); | |
344 | return err; | |
345 | } | |
223e8dc9 | 346 | |
e2bf3cae JW |
347 | if (max == end) |
348 | return 0; | |
349 | pos = bdata->node_low_pfn; | |
350 | } | |
351 | BUG(); | |
223e8dc9 JW |
352 | } |
353 | ||
a66fd7da JW |
354 | /** |
355 | * free_bootmem_node - mark a page range as usable | |
356 | * @pgdat: node the range resides on | |
357 | * @physaddr: starting address of the range | |
358 | * @size: size of the range in bytes | |
359 | * | |
360 | * Partial pages will be considered reserved and left as they are. | |
361 | * | |
e2bf3cae | 362 | * The range must reside completely on the specified node. |
a66fd7da | 363 | */ |
223e8dc9 JW |
364 | void __init free_bootmem_node(pg_data_t *pgdat, unsigned long physaddr, |
365 | unsigned long size) | |
366 | { | |
e2bf3cae JW |
367 | unsigned long start, end; |
368 | ||
ec3a354b CM |
369 | kmemleak_free_part(__va(physaddr), size); |
370 | ||
e2bf3cae JW |
371 | start = PFN_UP(physaddr); |
372 | end = PFN_DOWN(physaddr + size); | |
373 | ||
374 | mark_bootmem_node(pgdat->bdata, start, end, 0, 0); | |
223e8dc9 JW |
375 | } |
376 | ||
a66fd7da JW |
377 | /** |
378 | * free_bootmem - mark a page range as usable | |
379 | * @addr: starting address of the range | |
380 | * @size: size of the range in bytes | |
381 | * | |
382 | * Partial pages will be considered reserved and left as they are. | |
383 | * | |
e2bf3cae | 384 | * The range must be contiguous but may span node boundaries. |
a66fd7da | 385 | */ |
223e8dc9 JW |
386 | void __init free_bootmem(unsigned long addr, unsigned long size) |
387 | { | |
e2bf3cae | 388 | unsigned long start, end; |
a5645a61 | 389 | |
ec3a354b CM |
390 | kmemleak_free_part(__va(addr), size); |
391 | ||
e2bf3cae JW |
392 | start = PFN_UP(addr); |
393 | end = PFN_DOWN(addr + size); | |
1da177e4 | 394 | |
e2bf3cae | 395 | mark_bootmem(start, end, 0, 0); |
1da177e4 LT |
396 | } |
397 | ||
a66fd7da JW |
398 | /** |
399 | * reserve_bootmem_node - mark a page range as reserved | |
400 | * @pgdat: node the range resides on | |
401 | * @physaddr: starting address of the range | |
402 | * @size: size of the range in bytes | |
403 | * @flags: reservation flags (see linux/bootmem.h) | |
404 | * | |
405 | * Partial pages will be reserved. | |
406 | * | |
e2bf3cae | 407 | * The range must reside completely on the specified node. |
a66fd7da | 408 | */ |
223e8dc9 JW |
409 | int __init reserve_bootmem_node(pg_data_t *pgdat, unsigned long physaddr, |
410 | unsigned long size, int flags) | |
1da177e4 | 411 | { |
e2bf3cae | 412 | unsigned long start, end; |
1da177e4 | 413 | |
e2bf3cae JW |
414 | start = PFN_DOWN(physaddr); |
415 | end = PFN_UP(physaddr + size); | |
416 | ||
417 | return mark_bootmem_node(pgdat->bdata, start, end, 1, flags); | |
223e8dc9 | 418 | } |
5a982cbc | 419 | |
a66fd7da JW |
420 | /** |
421 | * reserve_bootmem - mark a page range as usable | |
422 | * @addr: starting address of the range | |
423 | * @size: size of the range in bytes | |
424 | * @flags: reservation flags (see linux/bootmem.h) | |
425 | * | |
426 | * Partial pages will be reserved. | |
427 | * | |
e2bf3cae | 428 | * The range must be contiguous but may span node boundaries. |
a66fd7da | 429 | */ |
223e8dc9 JW |
430 | int __init reserve_bootmem(unsigned long addr, unsigned long size, |
431 | int flags) | |
432 | { | |
e2bf3cae | 433 | unsigned long start, end; |
1da177e4 | 434 | |
e2bf3cae JW |
435 | start = PFN_DOWN(addr); |
436 | end = PFN_UP(addr + size); | |
223e8dc9 | 437 | |
e2bf3cae | 438 | return mark_bootmem(start, end, 1, flags); |
1da177e4 LT |
439 | } |
440 | ||
f88eff74 YL |
441 | int __weak __init reserve_bootmem_generic(unsigned long phys, unsigned long len, |
442 | int flags) | |
443 | { | |
444 | return reserve_bootmem(phys, len, flags); | |
445 | } | |
446 | ||
8aa043d7 JB |
447 | static unsigned long __init align_idx(struct bootmem_data *bdata, |
448 | unsigned long idx, unsigned long step) | |
481ebd0d JW |
449 | { |
450 | unsigned long base = bdata->node_min_pfn; | |
451 | ||
452 | /* | |
453 | * Align the index with respect to the node start so that the | |
454 | * combination of both satisfies the requested alignment. | |
455 | */ | |
456 | ||
457 | return ALIGN(base + idx, step) - base; | |
458 | } | |
459 | ||
8aa043d7 JB |
460 | static unsigned long __init align_off(struct bootmem_data *bdata, |
461 | unsigned long off, unsigned long align) | |
481ebd0d JW |
462 | { |
463 | unsigned long base = PFN_PHYS(bdata->node_min_pfn); | |
464 | ||
465 | /* Same as align_idx for byte offsets */ | |
466 | ||
467 | return ALIGN(base + off, align) - base; | |
468 | } | |
469 | ||
d0c4f570 TH |
470 | static void * __init alloc_bootmem_core(struct bootmem_data *bdata, |
471 | unsigned long size, unsigned long align, | |
472 | unsigned long goal, unsigned long limit) | |
1da177e4 | 473 | { |
0f3caba2 | 474 | unsigned long fallback = 0; |
5f2809e6 JW |
475 | unsigned long min, max, start, sidx, midx, step; |
476 | ||
594fe1a0 JW |
477 | bdebug("nid=%td size=%lx [%lu pages] align=%lx goal=%lx limit=%lx\n", |
478 | bdata - bootmem_node_data, size, PAGE_ALIGN(size) >> PAGE_SHIFT, | |
479 | align, goal, limit); | |
480 | ||
5f2809e6 JW |
481 | BUG_ON(!size); |
482 | BUG_ON(align & (align - 1)); | |
483 | BUG_ON(limit && goal + size > limit); | |
1da177e4 | 484 | |
7c309a64 CK |
485 | if (!bdata->node_bootmem_map) |
486 | return NULL; | |
487 | ||
3560e249 | 488 | min = bdata->node_min_pfn; |
5f2809e6 | 489 | max = bdata->node_low_pfn; |
9a2dc04c | 490 | |
5f2809e6 JW |
491 | goal >>= PAGE_SHIFT; |
492 | limit >>= PAGE_SHIFT; | |
493 | ||
494 | if (limit && max > limit) | |
495 | max = limit; | |
496 | if (max <= min) | |
9a2dc04c YL |
497 | return NULL; |
498 | ||
5f2809e6 | 499 | step = max(align >> PAGE_SHIFT, 1UL); |
281dd25c | 500 | |
5f2809e6 JW |
501 | if (goal && min < goal && goal < max) |
502 | start = ALIGN(goal, step); | |
503 | else | |
504 | start = ALIGN(min, step); | |
1da177e4 | 505 | |
481ebd0d | 506 | sidx = start - bdata->node_min_pfn; |
3560e249 | 507 | midx = max - bdata->node_min_pfn; |
1da177e4 | 508 | |
5f2809e6 | 509 | if (bdata->hint_idx > sidx) { |
0f3caba2 JW |
510 | /* |
511 | * Handle the valid case of sidx being zero and still | |
512 | * catch the fallback below. | |
513 | */ | |
514 | fallback = sidx + 1; | |
481ebd0d | 515 | sidx = align_idx(bdata, bdata->hint_idx, step); |
5f2809e6 | 516 | } |
1da177e4 | 517 | |
5f2809e6 JW |
518 | while (1) { |
519 | int merge; | |
520 | void *region; | |
521 | unsigned long eidx, i, start_off, end_off; | |
522 | find_block: | |
523 | sidx = find_next_zero_bit(bdata->node_bootmem_map, midx, sidx); | |
481ebd0d | 524 | sidx = align_idx(bdata, sidx, step); |
5f2809e6 | 525 | eidx = sidx + PFN_UP(size); |
ad09315c | 526 | |
5f2809e6 | 527 | if (sidx >= midx || eidx > midx) |
66d43e98 | 528 | break; |
1da177e4 | 529 | |
5f2809e6 JW |
530 | for (i = sidx; i < eidx; i++) |
531 | if (test_bit(i, bdata->node_bootmem_map)) { | |
481ebd0d | 532 | sidx = align_idx(bdata, i, step); |
5f2809e6 JW |
533 | if (sidx == i) |
534 | sidx += step; | |
535 | goto find_block; | |
536 | } | |
1da177e4 | 537 | |
627240aa | 538 | if (bdata->last_end_off & (PAGE_SIZE - 1) && |
5f2809e6 | 539 | PFN_DOWN(bdata->last_end_off) + 1 == sidx) |
481ebd0d | 540 | start_off = align_off(bdata, bdata->last_end_off, align); |
5f2809e6 JW |
541 | else |
542 | start_off = PFN_PHYS(sidx); | |
543 | ||
544 | merge = PFN_DOWN(start_off) < sidx; | |
545 | end_off = start_off + size; | |
546 | ||
547 | bdata->last_end_off = end_off; | |
548 | bdata->hint_idx = PFN_UP(end_off); | |
549 | ||
550 | /* | |
551 | * Reserve the area now: | |
552 | */ | |
d747fa4b JW |
553 | if (__reserve(bdata, PFN_DOWN(start_off) + merge, |
554 | PFN_UP(end_off), BOOTMEM_EXCLUSIVE)) | |
555 | BUG(); | |
5f2809e6 | 556 | |
3560e249 JW |
557 | region = phys_to_virt(PFN_PHYS(bdata->node_min_pfn) + |
558 | start_off); | |
5f2809e6 | 559 | memset(region, 0, size); |
008139d9 CM |
560 | /* |
561 | * The min_count is set to 0 so that bootmem allocated blocks | |
562 | * are never reported as leaks. | |
563 | */ | |
564 | kmemleak_alloc(region, size, 0, 0); | |
5f2809e6 | 565 | return region; |
1da177e4 LT |
566 | } |
567 | ||
0f3caba2 | 568 | if (fallback) { |
481ebd0d | 569 | sidx = align_idx(bdata, fallback - 1, step); |
0f3caba2 JW |
570 | fallback = 0; |
571 | goto find_block; | |
572 | } | |
573 | ||
574 | return NULL; | |
575 | } | |
576 | ||
d0c4f570 TH |
577 | static void * __init alloc_arch_preferred_bootmem(bootmem_data_t *bdata, |
578 | unsigned long size, unsigned long align, | |
579 | unsigned long goal, unsigned long limit) | |
580 | { | |
441c7e0a PE |
581 | if (WARN_ON_ONCE(slab_is_available())) |
582 | return kzalloc(size, GFP_NOWAIT); | |
583 | ||
d0c4f570 | 584 | #ifdef CONFIG_HAVE_ARCH_BOOTMEM |
433f13a7 JP |
585 | { |
586 | bootmem_data_t *p_bdata; | |
587 | ||
588 | p_bdata = bootmem_arch_preferred_node(bdata, size, align, | |
589 | goal, limit); | |
590 | if (p_bdata) | |
591 | return alloc_bootmem_core(p_bdata, size, align, | |
592 | goal, limit); | |
593 | } | |
d0c4f570 TH |
594 | #endif |
595 | return NULL; | |
596 | } | |
597 | ||
0f3caba2 JW |
598 | static void * __init ___alloc_bootmem_nopanic(unsigned long size, |
599 | unsigned long align, | |
600 | unsigned long goal, | |
601 | unsigned long limit) | |
602 | { | |
603 | bootmem_data_t *bdata; | |
d0c4f570 | 604 | void *region; |
0f3caba2 JW |
605 | |
606 | restart: | |
d0c4f570 TH |
607 | region = alloc_arch_preferred_bootmem(NULL, size, align, goal, limit); |
608 | if (region) | |
609 | return region; | |
0f3caba2 | 610 | |
d0c4f570 | 611 | list_for_each_entry(bdata, &bdata_list, list) { |
0f3caba2 JW |
612 | if (goal && bdata->node_low_pfn <= PFN_DOWN(goal)) |
613 | continue; | |
3560e249 | 614 | if (limit && bdata->node_min_pfn >= PFN_DOWN(limit)) |
0f3caba2 JW |
615 | break; |
616 | ||
617 | region = alloc_bootmem_core(bdata, size, align, goal, limit); | |
618 | if (region) | |
619 | return region; | |
620 | } | |
621 | ||
5f2809e6 JW |
622 | if (goal) { |
623 | goal = 0; | |
0f3caba2 | 624 | goto restart; |
5f2809e6 | 625 | } |
2e5237da | 626 | |
5f2809e6 | 627 | return NULL; |
1da177e4 LT |
628 | } |
629 | ||
a66fd7da JW |
630 | /** |
631 | * __alloc_bootmem_nopanic - allocate boot memory without panicking | |
632 | * @size: size of the request in bytes | |
633 | * @align: alignment of the region | |
634 | * @goal: preferred starting address of the region | |
635 | * | |
636 | * The goal is dropped if it can not be satisfied and the allocation will | |
637 | * fall back to memory below @goal. | |
638 | * | |
639 | * Allocation may happen on any node in the system. | |
640 | * | |
641 | * Returns NULL on failure. | |
642 | */ | |
bb0923a6 | 643 | void * __init __alloc_bootmem_nopanic(unsigned long size, unsigned long align, |
0f3caba2 | 644 | unsigned long goal) |
1da177e4 | 645 | { |
08677214 YL |
646 | unsigned long limit = 0; |
647 | ||
08677214 | 648 | return ___alloc_bootmem_nopanic(size, align, goal, limit); |
0f3caba2 | 649 | } |
1da177e4 | 650 | |
0f3caba2 JW |
651 | static void * __init ___alloc_bootmem(unsigned long size, unsigned long align, |
652 | unsigned long goal, unsigned long limit) | |
653 | { | |
654 | void *mem = ___alloc_bootmem_nopanic(size, align, goal, limit); | |
655 | ||
656 | if (mem) | |
657 | return mem; | |
658 | /* | |
659 | * Whoops, we cannot satisfy the allocation request. | |
660 | */ | |
661 | printk(KERN_ALERT "bootmem alloc of %lu bytes failed!\n", size); | |
662 | panic("Out of memory"); | |
a8062231 AK |
663 | return NULL; |
664 | } | |
1da177e4 | 665 | |
a66fd7da JW |
666 | /** |
667 | * __alloc_bootmem - allocate boot memory | |
668 | * @size: size of the request in bytes | |
669 | * @align: alignment of the region | |
670 | * @goal: preferred starting address of the region | |
671 | * | |
672 | * The goal is dropped if it can not be satisfied and the allocation will | |
673 | * fall back to memory below @goal. | |
674 | * | |
675 | * Allocation may happen on any node in the system. | |
676 | * | |
677 | * The function panics if the request can not be satisfied. | |
678 | */ | |
bb0923a6 FBH |
679 | void * __init __alloc_bootmem(unsigned long size, unsigned long align, |
680 | unsigned long goal) | |
a8062231 | 681 | { |
08677214 YL |
682 | unsigned long limit = 0; |
683 | ||
08677214 | 684 | return ___alloc_bootmem(size, align, goal, limit); |
1da177e4 LT |
685 | } |
686 | ||
4cc278b7 JW |
687 | static void * __init ___alloc_bootmem_node(bootmem_data_t *bdata, |
688 | unsigned long size, unsigned long align, | |
689 | unsigned long goal, unsigned long limit) | |
690 | { | |
691 | void *ptr; | |
692 | ||
d0c4f570 TH |
693 | ptr = alloc_arch_preferred_bootmem(bdata, size, align, goal, limit); |
694 | if (ptr) | |
695 | return ptr; | |
696 | ||
4cc278b7 JW |
697 | ptr = alloc_bootmem_core(bdata, size, align, goal, limit); |
698 | if (ptr) | |
699 | return ptr; | |
700 | ||
701 | return ___alloc_bootmem(size, align, goal, limit); | |
702 | } | |
703 | ||
a66fd7da JW |
704 | /** |
705 | * __alloc_bootmem_node - allocate boot memory from a specific node | |
706 | * @pgdat: node to allocate from | |
707 | * @size: size of the request in bytes | |
708 | * @align: alignment of the region | |
709 | * @goal: preferred starting address of the region | |
710 | * | |
711 | * The goal is dropped if it can not be satisfied and the allocation will | |
712 | * fall back to memory below @goal. | |
713 | * | |
714 | * Allocation may fall back to any node in the system if the specified node | |
715 | * can not hold the requested memory. | |
716 | * | |
717 | * The function panics if the request can not be satisfied. | |
718 | */ | |
bb0923a6 FBH |
719 | void * __init __alloc_bootmem_node(pg_data_t *pgdat, unsigned long size, |
720 | unsigned long align, unsigned long goal) | |
1da177e4 | 721 | { |
c91c4773 PE |
722 | if (WARN_ON_ONCE(slab_is_available())) |
723 | return kzalloc_node(size, GFP_NOWAIT, pgdat->node_id); | |
724 | ||
09325873 | 725 | return ___alloc_bootmem_node(pgdat->bdata, size, align, goal, 0); |
08677214 YL |
726 | } |
727 | ||
728 | void * __init __alloc_bootmem_node_high(pg_data_t *pgdat, unsigned long size, | |
729 | unsigned long align, unsigned long goal) | |
730 | { | |
731 | #ifdef MAX_DMA32_PFN | |
732 | unsigned long end_pfn; | |
733 | ||
734 | if (WARN_ON_ONCE(slab_is_available())) | |
735 | return kzalloc_node(size, GFP_NOWAIT, pgdat->node_id); | |
736 | ||
737 | /* update goal according ...MAX_DMA32_PFN */ | |
738 | end_pfn = pgdat->node_start_pfn + pgdat->node_spanned_pages; | |
739 | ||
740 | if (end_pfn > MAX_DMA32_PFN + (128 >> (20 - PAGE_SHIFT)) && | |
741 | (goal >> PAGE_SHIFT) < MAX_DMA32_PFN) { | |
742 | void *ptr; | |
743 | unsigned long new_goal; | |
744 | ||
745 | new_goal = MAX_DMA32_PFN << PAGE_SHIFT; | |
08677214 YL |
746 | ptr = alloc_bootmem_core(pgdat->bdata, size, align, |
747 | new_goal, 0); | |
08677214 YL |
748 | if (ptr) |
749 | return ptr; | |
750 | } | |
751 | #endif | |
752 | ||
753 | return __alloc_bootmem_node(pgdat, size, align, goal); | |
754 | ||
1da177e4 LT |
755 | } |
756 | ||
e70260aa | 757 | #ifdef CONFIG_SPARSEMEM |
a66fd7da JW |
758 | /** |
759 | * alloc_bootmem_section - allocate boot memory from a specific section | |
760 | * @size: size of the request in bytes | |
761 | * @section_nr: sparse map section to allocate from | |
762 | * | |
763 | * Return NULL on failure. | |
764 | */ | |
e70260aa YG |
765 | void * __init alloc_bootmem_section(unsigned long size, |
766 | unsigned long section_nr) | |
767 | { | |
75a56cfe | 768 | bootmem_data_t *bdata; |
f5bf18fa | 769 | unsigned long pfn, goal; |
e70260aa YG |
770 | |
771 | pfn = section_nr_to_pfn(section_nr); | |
75a56cfe | 772 | goal = pfn << PAGE_SHIFT; |
75a56cfe | 773 | bdata = &bootmem_node_data[early_pfn_to_nid(pfn)]; |
e70260aa | 774 | |
f5bf18fa | 775 | return alloc_bootmem_core(bdata, size, SMP_CACHE_BYTES, goal, 0); |
e70260aa YG |
776 | } |
777 | #endif | |
778 | ||
b54bbf7b AK |
779 | void * __init __alloc_bootmem_node_nopanic(pg_data_t *pgdat, unsigned long size, |
780 | unsigned long align, unsigned long goal) | |
781 | { | |
782 | void *ptr; | |
783 | ||
c91c4773 PE |
784 | if (WARN_ON_ONCE(slab_is_available())) |
785 | return kzalloc_node(size, GFP_NOWAIT, pgdat->node_id); | |
786 | ||
d0c4f570 TH |
787 | ptr = alloc_arch_preferred_bootmem(pgdat->bdata, size, align, goal, 0); |
788 | if (ptr) | |
789 | return ptr; | |
790 | ||
b54bbf7b AK |
791 | ptr = alloc_bootmem_core(pgdat->bdata, size, align, goal, 0); |
792 | if (ptr) | |
793 | return ptr; | |
794 | ||
795 | return __alloc_bootmem_nopanic(size, align, goal); | |
796 | } | |
797 | ||
dfd54cbc HC |
798 | #ifndef ARCH_LOW_ADDRESS_LIMIT |
799 | #define ARCH_LOW_ADDRESS_LIMIT 0xffffffffUL | |
800 | #endif | |
008857c1 | 801 | |
a66fd7da JW |
802 | /** |
803 | * __alloc_bootmem_low - allocate low boot memory | |
804 | * @size: size of the request in bytes | |
805 | * @align: alignment of the region | |
806 | * @goal: preferred starting address of the region | |
807 | * | |
808 | * The goal is dropped if it can not be satisfied and the allocation will | |
809 | * fall back to memory below @goal. | |
810 | * | |
811 | * Allocation may happen on any node in the system. | |
812 | * | |
813 | * The function panics if the request can not be satisfied. | |
814 | */ | |
bb0923a6 FBH |
815 | void * __init __alloc_bootmem_low(unsigned long size, unsigned long align, |
816 | unsigned long goal) | |
008857c1 | 817 | { |
0f3caba2 | 818 | return ___alloc_bootmem(size, align, goal, ARCH_LOW_ADDRESS_LIMIT); |
008857c1 RT |
819 | } |
820 | ||
a66fd7da JW |
821 | /** |
822 | * __alloc_bootmem_low_node - allocate low boot memory from a specific node | |
823 | * @pgdat: node to allocate from | |
824 | * @size: size of the request in bytes | |
825 | * @align: alignment of the region | |
826 | * @goal: preferred starting address of the region | |
827 | * | |
828 | * The goal is dropped if it can not be satisfied and the allocation will | |
829 | * fall back to memory below @goal. | |
830 | * | |
831 | * Allocation may fall back to any node in the system if the specified node | |
832 | * can not hold the requested memory. | |
833 | * | |
834 | * The function panics if the request can not be satisfied. | |
835 | */ | |
008857c1 RT |
836 | void * __init __alloc_bootmem_low_node(pg_data_t *pgdat, unsigned long size, |
837 | unsigned long align, unsigned long goal) | |
838 | { | |
c91c4773 PE |
839 | if (WARN_ON_ONCE(slab_is_available())) |
840 | return kzalloc_node(size, GFP_NOWAIT, pgdat->node_id); | |
841 | ||
09325873 | 842 | return ___alloc_bootmem_node(pgdat->bdata, size, align, |
b8ab9f82 | 843 | goal, ARCH_LOW_ADDRESS_LIMIT); |
008857c1 | 844 | } |