Commit | Line | Data |
---|---|---|
1da177e4 LT |
1 | /* |
2 | * linux/mm/bootmem.c | |
3 | * | |
4 | * Copyright (C) 1999 Ingo Molnar | |
5 | * Discontiguous memory support, Kanoj Sarcar, SGI, Nov 1999 | |
6 | * | |
7 | * simple boot-time physical memory area allocator and | |
8 | * free memory collector. It's used to deal with reserved | |
9 | * system memory and memory holes as well. | |
10 | */ | |
1da177e4 | 11 | #include <linux/init.h> |
bbc7b92e | 12 | #include <linux/pfn.h> |
1da177e4 | 13 | #include <linux/bootmem.h> |
1da177e4 | 14 | #include <linux/module.h> |
e786e86a FBH |
15 | |
16 | #include <asm/bug.h> | |
1da177e4 | 17 | #include <asm/io.h> |
dfd54cbc | 18 | #include <asm/processor.h> |
e786e86a | 19 | |
1da177e4 LT |
20 | #include "internal.h" |
21 | ||
22 | /* | |
23 | * Access to this subsystem has to be serialized externally. (this is | |
24 | * true for the boot process anyway) | |
25 | */ | |
26 | unsigned long max_low_pfn; | |
27 | unsigned long min_low_pfn; | |
28 | unsigned long max_pfn; | |
29 | ||
679bc9fb | 30 | static LIST_HEAD(bdata_list); |
92aa63a5 VG |
31 | #ifdef CONFIG_CRASH_DUMP |
32 | /* | |
33 | * If we have booted due to a crash, max_pfn will be a very low value. We need | |
34 | * to know the amount of memory that the previous kernel used. | |
35 | */ | |
36 | unsigned long saved_max_pfn; | |
37 | #endif | |
38 | ||
b61bfa3c JW |
39 | bootmem_data_t bootmem_node_data[MAX_NUMNODES] __initdata; |
40 | ||
223e8dc9 JW |
41 | /* |
42 | * Given an initialised bdata, it returns the size of the boot bitmap | |
43 | */ | |
44 | static unsigned long __init get_mapsize(bootmem_data_t *bdata) | |
45 | { | |
46 | unsigned long mapsize; | |
47 | unsigned long start = PFN_DOWN(bdata->node_boot_start); | |
48 | unsigned long end = bdata->node_low_pfn; | |
49 | ||
50 | mapsize = ((end - start) + 7) / 8; | |
51 | return ALIGN(mapsize, sizeof(long)); | |
52 | } | |
53 | ||
1da177e4 | 54 | /* return the number of _pages_ that will be allocated for the boot bitmap */ |
f71bf0ca | 55 | unsigned long __init bootmem_bootmap_pages(unsigned long pages) |
1da177e4 LT |
56 | { |
57 | unsigned long mapsize; | |
58 | ||
59 | mapsize = (pages+7)/8; | |
60 | mapsize = (mapsize + ~PAGE_MASK) & PAGE_MASK; | |
61 | mapsize >>= PAGE_SHIFT; | |
62 | ||
63 | return mapsize; | |
64 | } | |
f71bf0ca | 65 | |
679bc9fb KH |
66 | /* |
67 | * link bdata in order | |
68 | */ | |
69d49e68 | 69 | static void __init link_bootmem(bootmem_data_t *bdata) |
679bc9fb KH |
70 | { |
71 | bootmem_data_t *ent; | |
f71bf0ca | 72 | |
679bc9fb KH |
73 | if (list_empty(&bdata_list)) { |
74 | list_add(&bdata->list, &bdata_list); | |
75 | return; | |
76 | } | |
77 | /* insert in order */ | |
78 | list_for_each_entry(ent, &bdata_list, list) { | |
79 | if (bdata->node_boot_start < ent->node_boot_start) { | |
80 | list_add_tail(&bdata->list, &ent->list); | |
81 | return; | |
82 | } | |
83 | } | |
84 | list_add_tail(&bdata->list, &bdata_list); | |
679bc9fb KH |
85 | } |
86 | ||
1da177e4 LT |
87 | /* |
88 | * Called once to set up the allocator itself. | |
89 | */ | |
8ae04463 | 90 | static unsigned long __init init_bootmem_core(bootmem_data_t *bdata, |
1da177e4 LT |
91 | unsigned long mapstart, unsigned long start, unsigned long end) |
92 | { | |
bbc7b92e | 93 | unsigned long mapsize; |
1da177e4 | 94 | |
2dbb51c4 | 95 | mminit_validate_memmodel_limits(&start, &end); |
bbc7b92e FBH |
96 | bdata->node_bootmem_map = phys_to_virt(PFN_PHYS(mapstart)); |
97 | bdata->node_boot_start = PFN_PHYS(start); | |
1da177e4 | 98 | bdata->node_low_pfn = end; |
679bc9fb | 99 | link_bootmem(bdata); |
1da177e4 LT |
100 | |
101 | /* | |
102 | * Initially all pages are reserved - setup_arch() has to | |
103 | * register free RAM areas explicitly. | |
104 | */ | |
bbc7b92e | 105 | mapsize = get_mapsize(bdata); |
1da177e4 LT |
106 | memset(bdata->node_bootmem_map, 0xff, mapsize); |
107 | ||
108 | return mapsize; | |
109 | } | |
110 | ||
223e8dc9 JW |
111 | unsigned long __init init_bootmem_node(pg_data_t *pgdat, unsigned long freepfn, |
112 | unsigned long startpfn, unsigned long endpfn) | |
113 | { | |
114 | return init_bootmem_core(pgdat->bdata, freepfn, startpfn, endpfn); | |
115 | } | |
116 | ||
117 | unsigned long __init init_bootmem(unsigned long start, unsigned long pages) | |
118 | { | |
119 | max_low_pfn = pages; | |
120 | min_low_pfn = start; | |
121 | return init_bootmem_core(NODE_DATA(0)->bdata, start, 0, pages); | |
122 | } | |
123 | ||
124 | static unsigned long __init free_all_bootmem_core(bootmem_data_t *bdata) | |
125 | { | |
126 | struct page *page; | |
127 | unsigned long pfn; | |
128 | unsigned long i, count; | |
129 | unsigned long idx; | |
130 | unsigned long *map; | |
131 | int gofast = 0; | |
132 | ||
133 | BUG_ON(!bdata->node_bootmem_map); | |
134 | ||
135 | count = 0; | |
136 | /* first extant page of the node */ | |
137 | pfn = PFN_DOWN(bdata->node_boot_start); | |
138 | idx = bdata->node_low_pfn - pfn; | |
139 | map = bdata->node_bootmem_map; | |
140 | /* | |
141 | * Check if we are aligned to BITS_PER_LONG pages. If so, we might | |
142 | * be able to free page orders of that size at once. | |
143 | */ | |
144 | if (!(pfn & (BITS_PER_LONG-1))) | |
145 | gofast = 1; | |
146 | ||
147 | for (i = 0; i < idx; ) { | |
148 | unsigned long v = ~map[i / BITS_PER_LONG]; | |
149 | ||
150 | if (gofast && v == ~0UL) { | |
151 | int order; | |
152 | ||
153 | page = pfn_to_page(pfn); | |
154 | count += BITS_PER_LONG; | |
155 | order = ffs(BITS_PER_LONG) - 1; | |
156 | __free_pages_bootmem(page, order); | |
157 | i += BITS_PER_LONG; | |
158 | page += BITS_PER_LONG; | |
159 | } else if (v) { | |
160 | unsigned long m; | |
161 | ||
162 | page = pfn_to_page(pfn); | |
163 | for (m = 1; m && i < idx; m<<=1, page++, i++) { | |
164 | if (v & m) { | |
165 | count++; | |
166 | __free_pages_bootmem(page, 0); | |
167 | } | |
168 | } | |
169 | } else { | |
170 | i += BITS_PER_LONG; | |
171 | } | |
172 | pfn += BITS_PER_LONG; | |
173 | } | |
174 | ||
175 | /* | |
176 | * Now free the allocator bitmap itself, it's not | |
177 | * needed anymore: | |
178 | */ | |
179 | page = virt_to_page(bdata->node_bootmem_map); | |
180 | idx = (get_mapsize(bdata) + PAGE_SIZE-1) >> PAGE_SHIFT; | |
181 | for (i = 0; i < idx; i++, page++) | |
182 | __free_pages_bootmem(page, 0); | |
183 | count += i; | |
184 | bdata->node_bootmem_map = NULL; | |
185 | ||
186 | return count; | |
187 | } | |
188 | ||
189 | unsigned long __init free_all_bootmem_node(pg_data_t *pgdat) | |
190 | { | |
191 | register_page_bootmem_info_node(pgdat); | |
192 | return free_all_bootmem_core(pgdat->bdata); | |
193 | } | |
194 | ||
195 | unsigned long __init free_all_bootmem(void) | |
196 | { | |
197 | return free_all_bootmem_core(NODE_DATA(0)->bdata); | |
198 | } | |
199 | ||
200 | static void __init free_bootmem_core(bootmem_data_t *bdata, unsigned long addr, | |
201 | unsigned long size) | |
202 | { | |
203 | unsigned long sidx, eidx; | |
204 | unsigned long i; | |
205 | ||
206 | BUG_ON(!size); | |
207 | ||
208 | /* out range */ | |
209 | if (addr + size < bdata->node_boot_start || | |
210 | PFN_DOWN(addr) > bdata->node_low_pfn) | |
211 | return; | |
212 | /* | |
213 | * round down end of usable mem, partially free pages are | |
214 | * considered reserved. | |
215 | */ | |
216 | ||
217 | if (addr >= bdata->node_boot_start && addr < bdata->last_success) | |
218 | bdata->last_success = addr; | |
219 | ||
220 | /* | |
221 | * Round up to index to the range. | |
222 | */ | |
223 | if (PFN_UP(addr) > PFN_DOWN(bdata->node_boot_start)) | |
224 | sidx = PFN_UP(addr) - PFN_DOWN(bdata->node_boot_start); | |
225 | else | |
226 | sidx = 0; | |
227 | ||
228 | eidx = PFN_DOWN(addr + size - bdata->node_boot_start); | |
229 | if (eidx > bdata->node_low_pfn - PFN_DOWN(bdata->node_boot_start)) | |
230 | eidx = bdata->node_low_pfn - PFN_DOWN(bdata->node_boot_start); | |
231 | ||
232 | for (i = sidx; i < eidx; i++) { | |
233 | if (unlikely(!test_and_clear_bit(i, bdata->node_bootmem_map))) | |
234 | BUG(); | |
235 | } | |
236 | } | |
237 | ||
238 | void __init free_bootmem_node(pg_data_t *pgdat, unsigned long physaddr, | |
239 | unsigned long size) | |
240 | { | |
241 | free_bootmem_core(pgdat->bdata, physaddr, size); | |
242 | } | |
243 | ||
244 | void __init free_bootmem(unsigned long addr, unsigned long size) | |
245 | { | |
246 | bootmem_data_t *bdata; | |
247 | list_for_each_entry(bdata, &bdata_list, list) | |
248 | free_bootmem_core(bdata, addr, size); | |
249 | } | |
250 | ||
1da177e4 LT |
251 | /* |
252 | * Marks a particular physical memory range as unallocatable. Usable RAM | |
253 | * might be used for boot-time allocations - or it might get added | |
254 | * to the free page pool later on. | |
255 | */ | |
a5645a61 | 256 | static int __init can_reserve_bootmem_core(bootmem_data_t *bdata, |
72a7fe39 | 257 | unsigned long addr, unsigned long size, int flags) |
1da177e4 | 258 | { |
bbc7b92e | 259 | unsigned long sidx, eidx; |
1da177e4 | 260 | unsigned long i; |
a5645a61 YL |
261 | |
262 | BUG_ON(!size); | |
263 | ||
264 | /* out of range, don't hold other */ | |
265 | if (addr + size < bdata->node_boot_start || | |
266 | PFN_DOWN(addr) > bdata->node_low_pfn) | |
267 | return 0; | |
bbc7b92e | 268 | |
1da177e4 | 269 | /* |
a5645a61 | 270 | * Round up to index to the range. |
1da177e4 | 271 | */ |
a5645a61 YL |
272 | if (addr > bdata->node_boot_start) |
273 | sidx= PFN_DOWN(addr - bdata->node_boot_start); | |
274 | else | |
275 | sidx = 0; | |
276 | ||
277 | eidx = PFN_UP(addr + size - bdata->node_boot_start); | |
278 | if (eidx > bdata->node_low_pfn - PFN_DOWN(bdata->node_boot_start)) | |
279 | eidx = bdata->node_low_pfn - PFN_DOWN(bdata->node_boot_start); | |
280 | ||
281 | for (i = sidx; i < eidx; i++) { | |
282 | if (test_bit(i, bdata->node_bootmem_map)) { | |
283 | if (flags & BOOTMEM_EXCLUSIVE) | |
284 | return -EBUSY; | |
285 | } | |
286 | } | |
287 | ||
288 | return 0; | |
289 | ||
290 | } | |
291 | ||
292 | static void __init reserve_bootmem_core(bootmem_data_t *bdata, | |
293 | unsigned long addr, unsigned long size, int flags) | |
294 | { | |
295 | unsigned long sidx, eidx; | |
296 | unsigned long i; | |
297 | ||
1da177e4 | 298 | BUG_ON(!size); |
bbc7b92e | 299 | |
a5645a61 YL |
300 | /* out of range */ |
301 | if (addr + size < bdata->node_boot_start || | |
302 | PFN_DOWN(addr) > bdata->node_low_pfn) | |
303 | return; | |
304 | ||
305 | /* | |
306 | * Round up to index to the range. | |
307 | */ | |
308 | if (addr > bdata->node_boot_start) | |
309 | sidx= PFN_DOWN(addr - bdata->node_boot_start); | |
310 | else | |
311 | sidx = 0; | |
312 | ||
bbc7b92e | 313 | eidx = PFN_UP(addr + size - bdata->node_boot_start); |
a5645a61 YL |
314 | if (eidx > bdata->node_low_pfn - PFN_DOWN(bdata->node_boot_start)) |
315 | eidx = bdata->node_low_pfn - PFN_DOWN(bdata->node_boot_start); | |
1da177e4 | 316 | |
a5645a61 | 317 | for (i = sidx; i < eidx; i++) { |
1da177e4 LT |
318 | if (test_and_set_bit(i, bdata->node_bootmem_map)) { |
319 | #ifdef CONFIG_DEBUG_BOOTMEM | |
320 | printk("hm, page %08lx reserved twice.\n", i*PAGE_SIZE); | |
321 | #endif | |
322 | } | |
a5645a61 | 323 | } |
1da177e4 LT |
324 | } |
325 | ||
223e8dc9 JW |
326 | int __init reserve_bootmem_node(pg_data_t *pgdat, unsigned long physaddr, |
327 | unsigned long size, int flags) | |
1da177e4 | 328 | { |
223e8dc9 | 329 | int ret; |
1da177e4 | 330 | |
223e8dc9 JW |
331 | ret = can_reserve_bootmem_core(pgdat->bdata, physaddr, size, flags); |
332 | if (ret < 0) | |
333 | return -ENOMEM; | |
334 | reserve_bootmem_core(pgdat->bdata, physaddr, size, flags); | |
335 | return 0; | |
336 | } | |
5a982cbc | 337 | |
223e8dc9 JW |
338 | #ifndef CONFIG_HAVE_ARCH_BOOTMEM_NODE |
339 | int __init reserve_bootmem(unsigned long addr, unsigned long size, | |
340 | int flags) | |
341 | { | |
342 | bootmem_data_t *bdata; | |
343 | int ret; | |
1da177e4 | 344 | |
223e8dc9 JW |
345 | list_for_each_entry(bdata, &bdata_list, list) { |
346 | ret = can_reserve_bootmem_core(bdata, addr, size, flags); | |
347 | if (ret < 0) | |
348 | return ret; | |
1da177e4 | 349 | } |
223e8dc9 JW |
350 | list_for_each_entry(bdata, &bdata_list, list) |
351 | reserve_bootmem_core(bdata, addr, size, flags); | |
352 | ||
353 | return 0; | |
1da177e4 | 354 | } |
223e8dc9 | 355 | #endif /* !CONFIG_HAVE_ARCH_BOOTMEM_NODE */ |
1da177e4 LT |
356 | |
357 | /* | |
358 | * We 'merge' subsequent allocations to save space. We might 'lose' | |
359 | * some fraction of a page if allocations cannot be satisfied due to | |
360 | * size constraints on boxes where there is physical RAM space | |
361 | * fragmentation - in these cases (mostly large memory boxes) this | |
362 | * is not a problem. | |
363 | * | |
364 | * On low memory boxes we get it right in 100% of the cases. | |
365 | * | |
366 | * alignment has to be a power of 2 value. | |
367 | * | |
368 | * NOTE: This function is _not_ reentrant. | |
369 | */ | |
ffc6421f JW |
370 | static void * __init |
371 | alloc_bootmem_core(struct bootmem_data *bdata, unsigned long size, | |
372 | unsigned long align, unsigned long goal, unsigned long limit) | |
1da177e4 | 373 | { |
9a2dc04c | 374 | unsigned long areasize, preferred; |
bbc7b92e | 375 | unsigned long i, start = 0, incr, eidx, end_pfn; |
1da177e4 | 376 | void *ret; |
9a2dc04c YL |
377 | unsigned long node_boot_start; |
378 | void *node_bootmem_map; | |
1da177e4 | 379 | |
f71bf0ca | 380 | if (!size) { |
ffc6421f | 381 | printk("alloc_bootmem_core(): zero-sized request\n"); |
1da177e4 LT |
382 | BUG(); |
383 | } | |
384 | BUG_ON(align & (align-1)); | |
385 | ||
7c309a64 CK |
386 | /* on nodes without memory - bootmem_map is NULL */ |
387 | if (!bdata->node_bootmem_map) | |
388 | return NULL; | |
389 | ||
9a2dc04c YL |
390 | /* bdata->node_boot_start is supposed to be (12+6)bits alignment on x86_64 ? */ |
391 | node_boot_start = bdata->node_boot_start; | |
392 | node_bootmem_map = bdata->node_bootmem_map; | |
393 | if (align) { | |
394 | node_boot_start = ALIGN(bdata->node_boot_start, align); | |
395 | if (node_boot_start > bdata->node_boot_start) | |
396 | node_bootmem_map = (unsigned long *)bdata->node_bootmem_map + | |
397 | PFN_DOWN(node_boot_start - bdata->node_boot_start)/BITS_PER_LONG; | |
398 | } | |
399 | ||
400 | if (limit && node_boot_start >= limit) | |
401 | return NULL; | |
402 | ||
bbc7b92e FBH |
403 | end_pfn = bdata->node_low_pfn; |
404 | limit = PFN_DOWN(limit); | |
281dd25c YG |
405 | if (limit && end_pfn > limit) |
406 | end_pfn = limit; | |
407 | ||
9a2dc04c | 408 | eidx = end_pfn - PFN_DOWN(node_boot_start); |
1da177e4 LT |
409 | |
410 | /* | |
411 | * We try to allocate bootmem pages above 'goal' | |
412 | * first, then we try to allocate lower pages. | |
413 | */ | |
ad09315c YL |
414 | preferred = 0; |
415 | if (goal && PFN_DOWN(goal) < end_pfn) { | |
9a2dc04c YL |
416 | if (goal > node_boot_start) |
417 | preferred = goal - node_boot_start; | |
1da177e4 | 418 | |
9a2dc04c YL |
419 | if (bdata->last_success > node_boot_start && |
420 | bdata->last_success - node_boot_start >= preferred) | |
281dd25c | 421 | if (!limit || (limit && limit > bdata->last_success)) |
9a2dc04c | 422 | preferred = bdata->last_success - node_boot_start; |
ad09315c | 423 | } |
1da177e4 | 424 | |
9a2dc04c | 425 | preferred = PFN_DOWN(ALIGN(preferred, align)); |
bbc7b92e | 426 | areasize = (size + PAGE_SIZE-1) / PAGE_SIZE; |
1da177e4 LT |
427 | incr = align >> PAGE_SHIFT ? : 1; |
428 | ||
429 | restart_scan: | |
ad09315c | 430 | for (i = preferred; i < eidx;) { |
1da177e4 | 431 | unsigned long j; |
ad09315c | 432 | |
9a2dc04c | 433 | i = find_next_zero_bit(node_bootmem_map, eidx, i); |
1da177e4 | 434 | i = ALIGN(i, incr); |
66d43e98 HM |
435 | if (i >= eidx) |
436 | break; | |
9a2dc04c | 437 | if (test_bit(i, node_bootmem_map)) { |
ad09315c | 438 | i += incr; |
1da177e4 | 439 | continue; |
ad09315c | 440 | } |
1da177e4 LT |
441 | for (j = i + 1; j < i + areasize; ++j) { |
442 | if (j >= eidx) | |
443 | goto fail_block; | |
9a2dc04c | 444 | if (test_bit(j, node_bootmem_map)) |
1da177e4 LT |
445 | goto fail_block; |
446 | } | |
447 | start = i; | |
448 | goto found; | |
449 | fail_block: | |
450 | i = ALIGN(j, incr); | |
ad09315c YL |
451 | if (i == j) |
452 | i += incr; | |
1da177e4 LT |
453 | } |
454 | ||
9a2dc04c YL |
455 | if (preferred > 0) { |
456 | preferred = 0; | |
1da177e4 LT |
457 | goto restart_scan; |
458 | } | |
459 | return NULL; | |
460 | ||
461 | found: | |
9a2dc04c | 462 | bdata->last_success = PFN_PHYS(start) + node_boot_start; |
1da177e4 LT |
463 | BUG_ON(start >= eidx); |
464 | ||
465 | /* | |
466 | * Is the next page of the previous allocation-end the start | |
467 | * of this allocation's buffer? If yes then we can 'merge' | |
468 | * the previous partial page with this allocation. | |
469 | */ | |
470 | if (align < PAGE_SIZE && | |
471 | bdata->last_offset && bdata->last_pos+1 == start) { | |
9a2dc04c | 472 | unsigned long offset, remaining_size; |
8c0e33c1 | 473 | offset = ALIGN(bdata->last_offset, align); |
1da177e4 | 474 | BUG_ON(offset > PAGE_SIZE); |
f71bf0ca | 475 | remaining_size = PAGE_SIZE - offset; |
1da177e4 LT |
476 | if (size < remaining_size) { |
477 | areasize = 0; | |
478 | /* last_pos unchanged */ | |
f71bf0ca FBH |
479 | bdata->last_offset = offset + size; |
480 | ret = phys_to_virt(bdata->last_pos * PAGE_SIZE + | |
9a2dc04c | 481 | offset + node_boot_start); |
1da177e4 LT |
482 | } else { |
483 | remaining_size = size - remaining_size; | |
f71bf0ca FBH |
484 | areasize = (remaining_size + PAGE_SIZE-1) / PAGE_SIZE; |
485 | ret = phys_to_virt(bdata->last_pos * PAGE_SIZE + | |
9a2dc04c | 486 | offset + node_boot_start); |
f71bf0ca | 487 | bdata->last_pos = start + areasize - 1; |
1da177e4 LT |
488 | bdata->last_offset = remaining_size; |
489 | } | |
490 | bdata->last_offset &= ~PAGE_MASK; | |
491 | } else { | |
492 | bdata->last_pos = start + areasize - 1; | |
493 | bdata->last_offset = size & ~PAGE_MASK; | |
9a2dc04c | 494 | ret = phys_to_virt(start * PAGE_SIZE + node_boot_start); |
1da177e4 LT |
495 | } |
496 | ||
497 | /* | |
498 | * Reserve the area now: | |
499 | */ | |
f71bf0ca | 500 | for (i = start; i < start + areasize; i++) |
9a2dc04c | 501 | if (unlikely(test_and_set_bit(i, node_bootmem_map))) |
1da177e4 LT |
502 | BUG(); |
503 | memset(ret, 0, size); | |
504 | return ret; | |
505 | } | |
506 | ||
bb0923a6 FBH |
507 | void * __init __alloc_bootmem_nopanic(unsigned long size, unsigned long align, |
508 | unsigned long goal) | |
1da177e4 | 509 | { |
679bc9fb | 510 | bootmem_data_t *bdata; |
1da177e4 LT |
511 | void *ptr; |
512 | ||
f71bf0ca | 513 | list_for_each_entry(bdata, &bdata_list, list) { |
ffc6421f | 514 | ptr = alloc_bootmem_core(bdata, size, align, goal, 0); |
f71bf0ca FBH |
515 | if (ptr) |
516 | return ptr; | |
517 | } | |
a8062231 AK |
518 | return NULL; |
519 | } | |
1da177e4 | 520 | |
bb0923a6 FBH |
521 | void * __init __alloc_bootmem(unsigned long size, unsigned long align, |
522 | unsigned long goal) | |
a8062231 AK |
523 | { |
524 | void *mem = __alloc_bootmem_nopanic(size,align,goal); | |
f71bf0ca | 525 | |
a8062231 AK |
526 | if (mem) |
527 | return mem; | |
1da177e4 LT |
528 | /* |
529 | * Whoops, we cannot satisfy the allocation request. | |
530 | */ | |
531 | printk(KERN_ALERT "bootmem alloc of %lu bytes failed!\n", size); | |
532 | panic("Out of memory"); | |
533 | return NULL; | |
534 | } | |
535 | ||
bb0923a6 FBH |
536 | void * __init __alloc_bootmem_node(pg_data_t *pgdat, unsigned long size, |
537 | unsigned long align, unsigned long goal) | |
1da177e4 LT |
538 | { |
539 | void *ptr; | |
540 | ||
ffc6421f | 541 | ptr = alloc_bootmem_core(pgdat->bdata, size, align, goal, 0); |
1da177e4 | 542 | if (ptr) |
f71bf0ca | 543 | return ptr; |
1da177e4 | 544 | |
008857c1 | 545 | return __alloc_bootmem(size, align, goal); |
1da177e4 LT |
546 | } |
547 | ||
e70260aa YG |
548 | #ifdef CONFIG_SPARSEMEM |
549 | void * __init alloc_bootmem_section(unsigned long size, | |
550 | unsigned long section_nr) | |
551 | { | |
552 | void *ptr; | |
553 | unsigned long limit, goal, start_nr, end_nr, pfn; | |
554 | struct pglist_data *pgdat; | |
555 | ||
556 | pfn = section_nr_to_pfn(section_nr); | |
557 | goal = PFN_PHYS(pfn); | |
558 | limit = PFN_PHYS(section_nr_to_pfn(section_nr + 1)) - 1; | |
559 | pgdat = NODE_DATA(early_pfn_to_nid(pfn)); | |
ffc6421f JW |
560 | ptr = alloc_bootmem_core(pgdat->bdata, size, SMP_CACHE_BYTES, goal, |
561 | limit); | |
e70260aa YG |
562 | |
563 | if (!ptr) | |
564 | return NULL; | |
565 | ||
566 | start_nr = pfn_to_section_nr(PFN_DOWN(__pa(ptr))); | |
567 | end_nr = pfn_to_section_nr(PFN_DOWN(__pa(ptr) + size)); | |
568 | if (start_nr != section_nr || end_nr != section_nr) { | |
569 | printk(KERN_WARNING "alloc_bootmem failed on section %ld.\n", | |
570 | section_nr); | |
571 | free_bootmem_core(pgdat->bdata, __pa(ptr), size); | |
572 | ptr = NULL; | |
573 | } | |
574 | ||
575 | return ptr; | |
576 | } | |
577 | #endif | |
578 | ||
b54bbf7b AK |
579 | void * __init __alloc_bootmem_node_nopanic(pg_data_t *pgdat, unsigned long size, |
580 | unsigned long align, unsigned long goal) | |
581 | { | |
582 | void *ptr; | |
583 | ||
584 | ptr = alloc_bootmem_core(pgdat->bdata, size, align, goal, 0); | |
585 | if (ptr) | |
586 | return ptr; | |
587 | ||
588 | return __alloc_bootmem_nopanic(size, align, goal); | |
589 | } | |
590 | ||
dfd54cbc HC |
591 | #ifndef ARCH_LOW_ADDRESS_LIMIT |
592 | #define ARCH_LOW_ADDRESS_LIMIT 0xffffffffUL | |
593 | #endif | |
008857c1 | 594 | |
bb0923a6 FBH |
595 | void * __init __alloc_bootmem_low(unsigned long size, unsigned long align, |
596 | unsigned long goal) | |
008857c1 | 597 | { |
679bc9fb | 598 | bootmem_data_t *bdata; |
008857c1 RT |
599 | void *ptr; |
600 | ||
f71bf0ca | 601 | list_for_each_entry(bdata, &bdata_list, list) { |
ffc6421f JW |
602 | ptr = alloc_bootmem_core(bdata, size, align, goal, |
603 | ARCH_LOW_ADDRESS_LIMIT); | |
f71bf0ca FBH |
604 | if (ptr) |
605 | return ptr; | |
606 | } | |
008857c1 RT |
607 | |
608 | /* | |
609 | * Whoops, we cannot satisfy the allocation request. | |
610 | */ | |
611 | printk(KERN_ALERT "low bootmem alloc of %lu bytes failed!\n", size); | |
612 | panic("Out of low memory"); | |
613 | return NULL; | |
614 | } | |
615 | ||
616 | void * __init __alloc_bootmem_low_node(pg_data_t *pgdat, unsigned long size, | |
617 | unsigned long align, unsigned long goal) | |
618 | { | |
ffc6421f JW |
619 | return alloc_bootmem_core(pgdat->bdata, size, align, goal, |
620 | ARCH_LOW_ADDRESS_LIMIT); | |
008857c1 | 621 | } |