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Commit | Line | Data |
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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 | ||
1da177e4 | 39 | /* return the number of _pages_ that will be allocated for the boot bitmap */ |
f71bf0ca | 40 | unsigned long __init bootmem_bootmap_pages(unsigned long pages) |
1da177e4 LT |
41 | { |
42 | unsigned long mapsize; | |
43 | ||
44 | mapsize = (pages+7)/8; | |
45 | mapsize = (mapsize + ~PAGE_MASK) & PAGE_MASK; | |
46 | mapsize >>= PAGE_SHIFT; | |
47 | ||
48 | return mapsize; | |
49 | } | |
f71bf0ca | 50 | |
679bc9fb KH |
51 | /* |
52 | * link bdata in order | |
53 | */ | |
69d49e68 | 54 | static void __init link_bootmem(bootmem_data_t *bdata) |
679bc9fb KH |
55 | { |
56 | bootmem_data_t *ent; | |
f71bf0ca | 57 | |
679bc9fb KH |
58 | if (list_empty(&bdata_list)) { |
59 | list_add(&bdata->list, &bdata_list); | |
60 | return; | |
61 | } | |
62 | /* insert in order */ | |
63 | list_for_each_entry(ent, &bdata_list, list) { | |
64 | if (bdata->node_boot_start < ent->node_boot_start) { | |
65 | list_add_tail(&bdata->list, &ent->list); | |
66 | return; | |
67 | } | |
68 | } | |
69 | list_add_tail(&bdata->list, &bdata_list); | |
679bc9fb KH |
70 | } |
71 | ||
bbc7b92e FBH |
72 | /* |
73 | * Given an initialised bdata, it returns the size of the boot bitmap | |
74 | */ | |
75 | static unsigned long __init get_mapsize(bootmem_data_t *bdata) | |
76 | { | |
77 | unsigned long mapsize; | |
78 | unsigned long start = PFN_DOWN(bdata->node_boot_start); | |
79 | unsigned long end = bdata->node_low_pfn; | |
80 | ||
81 | mapsize = ((end - start) + 7) / 8; | |
82 | return ALIGN(mapsize, sizeof(long)); | |
83 | } | |
1da177e4 LT |
84 | |
85 | /* | |
86 | * Called once to set up the allocator itself. | |
87 | */ | |
f71bf0ca | 88 | static unsigned long __init init_bootmem_core(pg_data_t *pgdat, |
1da177e4 LT |
89 | unsigned long mapstart, unsigned long start, unsigned long end) |
90 | { | |
91 | bootmem_data_t *bdata = pgdat->bdata; | |
bbc7b92e | 92 | unsigned long mapsize; |
1da177e4 | 93 | |
bbc7b92e FBH |
94 | bdata->node_bootmem_map = phys_to_virt(PFN_PHYS(mapstart)); |
95 | bdata->node_boot_start = PFN_PHYS(start); | |
1da177e4 | 96 | bdata->node_low_pfn = end; |
679bc9fb | 97 | link_bootmem(bdata); |
1da177e4 LT |
98 | |
99 | /* | |
100 | * Initially all pages are reserved - setup_arch() has to | |
101 | * register free RAM areas explicitly. | |
102 | */ | |
bbc7b92e | 103 | mapsize = get_mapsize(bdata); |
1da177e4 LT |
104 | memset(bdata->node_bootmem_map, 0xff, mapsize); |
105 | ||
106 | return mapsize; | |
107 | } | |
108 | ||
109 | /* | |
110 | * Marks a particular physical memory range as unallocatable. Usable RAM | |
111 | * might be used for boot-time allocations - or it might get added | |
112 | * to the free page pool later on. | |
113 | */ | |
a5645a61 | 114 | static int __init can_reserve_bootmem_core(bootmem_data_t *bdata, |
72a7fe39 | 115 | unsigned long addr, unsigned long size, int flags) |
1da177e4 | 116 | { |
bbc7b92e | 117 | unsigned long sidx, eidx; |
1da177e4 | 118 | unsigned long i; |
a5645a61 YL |
119 | |
120 | BUG_ON(!size); | |
121 | ||
122 | /* out of range, don't hold other */ | |
123 | if (addr + size < bdata->node_boot_start || | |
124 | PFN_DOWN(addr) > bdata->node_low_pfn) | |
125 | return 0; | |
bbc7b92e | 126 | |
1da177e4 | 127 | /* |
a5645a61 | 128 | * Round up to index to the range. |
1da177e4 | 129 | */ |
a5645a61 YL |
130 | if (addr > bdata->node_boot_start) |
131 | sidx= PFN_DOWN(addr - bdata->node_boot_start); | |
132 | else | |
133 | sidx = 0; | |
134 | ||
135 | eidx = PFN_UP(addr + size - bdata->node_boot_start); | |
136 | if (eidx > bdata->node_low_pfn - PFN_DOWN(bdata->node_boot_start)) | |
137 | eidx = bdata->node_low_pfn - PFN_DOWN(bdata->node_boot_start); | |
138 | ||
139 | for (i = sidx; i < eidx; i++) { | |
140 | if (test_bit(i, bdata->node_bootmem_map)) { | |
141 | if (flags & BOOTMEM_EXCLUSIVE) | |
142 | return -EBUSY; | |
143 | } | |
144 | } | |
145 | ||
146 | return 0; | |
147 | ||
148 | } | |
149 | ||
150 | static void __init reserve_bootmem_core(bootmem_data_t *bdata, | |
151 | unsigned long addr, unsigned long size, int flags) | |
152 | { | |
153 | unsigned long sidx, eidx; | |
154 | unsigned long i; | |
155 | ||
1da177e4 | 156 | BUG_ON(!size); |
bbc7b92e | 157 | |
a5645a61 YL |
158 | /* out of range */ |
159 | if (addr + size < bdata->node_boot_start || | |
160 | PFN_DOWN(addr) > bdata->node_low_pfn) | |
161 | return; | |
162 | ||
163 | /* | |
164 | * Round up to index to the range. | |
165 | */ | |
166 | if (addr > bdata->node_boot_start) | |
167 | sidx= PFN_DOWN(addr - bdata->node_boot_start); | |
168 | else | |
169 | sidx = 0; | |
170 | ||
bbc7b92e | 171 | eidx = PFN_UP(addr + size - bdata->node_boot_start); |
a5645a61 YL |
172 | if (eidx > bdata->node_low_pfn - PFN_DOWN(bdata->node_boot_start)) |
173 | eidx = bdata->node_low_pfn - PFN_DOWN(bdata->node_boot_start); | |
1da177e4 | 174 | |
a5645a61 | 175 | for (i = sidx; i < eidx; i++) { |
1da177e4 LT |
176 | if (test_and_set_bit(i, bdata->node_bootmem_map)) { |
177 | #ifdef CONFIG_DEBUG_BOOTMEM | |
178 | printk("hm, page %08lx reserved twice.\n", i*PAGE_SIZE); | |
179 | #endif | |
180 | } | |
a5645a61 | 181 | } |
1da177e4 LT |
182 | } |
183 | ||
bb0923a6 FBH |
184 | static void __init free_bootmem_core(bootmem_data_t *bdata, unsigned long addr, |
185 | unsigned long size) | |
1da177e4 | 186 | { |
bbc7b92e | 187 | unsigned long sidx, eidx; |
1da177e4 | 188 | unsigned long i; |
bbc7b92e | 189 | |
5a982cbc YL |
190 | BUG_ON(!size); |
191 | ||
192 | /* out range */ | |
193 | if (addr + size < bdata->node_boot_start || | |
194 | PFN_DOWN(addr) > bdata->node_low_pfn) | |
195 | return; | |
1da177e4 LT |
196 | /* |
197 | * round down end of usable mem, partially free pages are | |
198 | * considered reserved. | |
199 | */ | |
1da177e4 | 200 | |
5a982cbc | 201 | if (addr >= bdata->node_boot_start && addr < bdata->last_success) |
1da177e4 LT |
202 | bdata->last_success = addr; |
203 | ||
204 | /* | |
5a982cbc | 205 | * Round up to index to the range. |
1da177e4 | 206 | */ |
5a982cbc YL |
207 | if (PFN_UP(addr) > PFN_DOWN(bdata->node_boot_start)) |
208 | sidx = PFN_UP(addr) - PFN_DOWN(bdata->node_boot_start); | |
209 | else | |
210 | sidx = 0; | |
211 | ||
bbc7b92e | 212 | eidx = PFN_DOWN(addr + size - bdata->node_boot_start); |
5a982cbc YL |
213 | if (eidx > bdata->node_low_pfn - PFN_DOWN(bdata->node_boot_start)) |
214 | eidx = bdata->node_low_pfn - PFN_DOWN(bdata->node_boot_start); | |
1da177e4 LT |
215 | |
216 | for (i = sidx; i < eidx; i++) { | |
217 | if (unlikely(!test_and_clear_bit(i, bdata->node_bootmem_map))) | |
218 | BUG(); | |
219 | } | |
220 | } | |
221 | ||
222 | /* | |
223 | * We 'merge' subsequent allocations to save space. We might 'lose' | |
224 | * some fraction of a page if allocations cannot be satisfied due to | |
225 | * size constraints on boxes where there is physical RAM space | |
226 | * fragmentation - in these cases (mostly large memory boxes) this | |
227 | * is not a problem. | |
228 | * | |
229 | * On low memory boxes we get it right in 100% of the cases. | |
230 | * | |
231 | * alignment has to be a power of 2 value. | |
232 | * | |
233 | * NOTE: This function is _not_ reentrant. | |
234 | */ | |
267b4801 | 235 | void * __init |
1da177e4 | 236 | __alloc_bootmem_core(struct bootmem_data *bdata, unsigned long size, |
281dd25c | 237 | unsigned long align, unsigned long goal, unsigned long limit) |
1da177e4 | 238 | { |
9a2dc04c | 239 | unsigned long areasize, preferred; |
bbc7b92e | 240 | unsigned long i, start = 0, incr, eidx, end_pfn; |
1da177e4 | 241 | void *ret; |
9a2dc04c YL |
242 | unsigned long node_boot_start; |
243 | void *node_bootmem_map; | |
1da177e4 | 244 | |
f71bf0ca | 245 | if (!size) { |
1da177e4 LT |
246 | printk("__alloc_bootmem_core(): zero-sized request\n"); |
247 | BUG(); | |
248 | } | |
249 | BUG_ON(align & (align-1)); | |
250 | ||
7c309a64 CK |
251 | /* on nodes without memory - bootmem_map is NULL */ |
252 | if (!bdata->node_bootmem_map) | |
253 | return NULL; | |
254 | ||
9a2dc04c YL |
255 | /* bdata->node_boot_start is supposed to be (12+6)bits alignment on x86_64 ? */ |
256 | node_boot_start = bdata->node_boot_start; | |
257 | node_bootmem_map = bdata->node_bootmem_map; | |
258 | if (align) { | |
259 | node_boot_start = ALIGN(bdata->node_boot_start, align); | |
260 | if (node_boot_start > bdata->node_boot_start) | |
261 | node_bootmem_map = (unsigned long *)bdata->node_bootmem_map + | |
262 | PFN_DOWN(node_boot_start - bdata->node_boot_start)/BITS_PER_LONG; | |
263 | } | |
264 | ||
265 | if (limit && node_boot_start >= limit) | |
266 | return NULL; | |
267 | ||
bbc7b92e FBH |
268 | end_pfn = bdata->node_low_pfn; |
269 | limit = PFN_DOWN(limit); | |
281dd25c YG |
270 | if (limit && end_pfn > limit) |
271 | end_pfn = limit; | |
272 | ||
9a2dc04c | 273 | eidx = end_pfn - PFN_DOWN(node_boot_start); |
1da177e4 LT |
274 | |
275 | /* | |
276 | * We try to allocate bootmem pages above 'goal' | |
277 | * first, then we try to allocate lower pages. | |
278 | */ | |
ad09315c YL |
279 | preferred = 0; |
280 | if (goal && PFN_DOWN(goal) < end_pfn) { | |
9a2dc04c YL |
281 | if (goal > node_boot_start) |
282 | preferred = goal - node_boot_start; | |
1da177e4 | 283 | |
9a2dc04c YL |
284 | if (bdata->last_success > node_boot_start && |
285 | bdata->last_success - node_boot_start >= preferred) | |
281dd25c | 286 | if (!limit || (limit && limit > bdata->last_success)) |
9a2dc04c | 287 | preferred = bdata->last_success - node_boot_start; |
ad09315c | 288 | } |
1da177e4 | 289 | |
9a2dc04c | 290 | preferred = PFN_DOWN(ALIGN(preferred, align)); |
bbc7b92e | 291 | areasize = (size + PAGE_SIZE-1) / PAGE_SIZE; |
1da177e4 LT |
292 | incr = align >> PAGE_SHIFT ? : 1; |
293 | ||
294 | restart_scan: | |
ad09315c | 295 | for (i = preferred; i < eidx;) { |
1da177e4 | 296 | unsigned long j; |
ad09315c | 297 | |
9a2dc04c | 298 | i = find_next_zero_bit(node_bootmem_map, eidx, i); |
1da177e4 | 299 | i = ALIGN(i, incr); |
66d43e98 HM |
300 | if (i >= eidx) |
301 | break; | |
9a2dc04c | 302 | if (test_bit(i, node_bootmem_map)) { |
ad09315c | 303 | i += incr; |
1da177e4 | 304 | continue; |
ad09315c | 305 | } |
1da177e4 LT |
306 | for (j = i + 1; j < i + areasize; ++j) { |
307 | if (j >= eidx) | |
308 | goto fail_block; | |
9a2dc04c | 309 | if (test_bit(j, node_bootmem_map)) |
1da177e4 LT |
310 | goto fail_block; |
311 | } | |
312 | start = i; | |
313 | goto found; | |
314 | fail_block: | |
315 | i = ALIGN(j, incr); | |
ad09315c YL |
316 | if (i == j) |
317 | i += incr; | |
1da177e4 LT |
318 | } |
319 | ||
9a2dc04c YL |
320 | if (preferred > 0) { |
321 | preferred = 0; | |
1da177e4 LT |
322 | goto restart_scan; |
323 | } | |
324 | return NULL; | |
325 | ||
326 | found: | |
9a2dc04c | 327 | bdata->last_success = PFN_PHYS(start) + node_boot_start; |
1da177e4 LT |
328 | BUG_ON(start >= eidx); |
329 | ||
330 | /* | |
331 | * Is the next page of the previous allocation-end the start | |
332 | * of this allocation's buffer? If yes then we can 'merge' | |
333 | * the previous partial page with this allocation. | |
334 | */ | |
335 | if (align < PAGE_SIZE && | |
336 | bdata->last_offset && bdata->last_pos+1 == start) { | |
9a2dc04c | 337 | unsigned long offset, remaining_size; |
8c0e33c1 | 338 | offset = ALIGN(bdata->last_offset, align); |
1da177e4 | 339 | BUG_ON(offset > PAGE_SIZE); |
f71bf0ca | 340 | remaining_size = PAGE_SIZE - offset; |
1da177e4 LT |
341 | if (size < remaining_size) { |
342 | areasize = 0; | |
343 | /* last_pos unchanged */ | |
f71bf0ca FBH |
344 | bdata->last_offset = offset + size; |
345 | ret = phys_to_virt(bdata->last_pos * PAGE_SIZE + | |
9a2dc04c | 346 | offset + node_boot_start); |
1da177e4 LT |
347 | } else { |
348 | remaining_size = size - remaining_size; | |
f71bf0ca FBH |
349 | areasize = (remaining_size + PAGE_SIZE-1) / PAGE_SIZE; |
350 | ret = phys_to_virt(bdata->last_pos * PAGE_SIZE + | |
9a2dc04c | 351 | offset + node_boot_start); |
f71bf0ca | 352 | bdata->last_pos = start + areasize - 1; |
1da177e4 LT |
353 | bdata->last_offset = remaining_size; |
354 | } | |
355 | bdata->last_offset &= ~PAGE_MASK; | |
356 | } else { | |
357 | bdata->last_pos = start + areasize - 1; | |
358 | bdata->last_offset = size & ~PAGE_MASK; | |
9a2dc04c | 359 | ret = phys_to_virt(start * PAGE_SIZE + node_boot_start); |
1da177e4 LT |
360 | } |
361 | ||
362 | /* | |
363 | * Reserve the area now: | |
364 | */ | |
f71bf0ca | 365 | for (i = start; i < start + areasize; i++) |
9a2dc04c | 366 | if (unlikely(test_and_set_bit(i, node_bootmem_map))) |
1da177e4 LT |
367 | BUG(); |
368 | memset(ret, 0, size); | |
369 | return ret; | |
370 | } | |
371 | ||
372 | static unsigned long __init free_all_bootmem_core(pg_data_t *pgdat) | |
373 | { | |
374 | struct page *page; | |
d41dee36 | 375 | unsigned long pfn; |
1da177e4 LT |
376 | bootmem_data_t *bdata = pgdat->bdata; |
377 | unsigned long i, count, total = 0; | |
378 | unsigned long idx; | |
379 | unsigned long *map; | |
380 | int gofast = 0; | |
381 | ||
382 | BUG_ON(!bdata->node_bootmem_map); | |
383 | ||
384 | count = 0; | |
385 | /* first extant page of the node */ | |
bbc7b92e FBH |
386 | pfn = PFN_DOWN(bdata->node_boot_start); |
387 | idx = bdata->node_low_pfn - pfn; | |
1da177e4 LT |
388 | map = bdata->node_bootmem_map; |
389 | /* Check physaddr is O(LOG2(BITS_PER_LONG)) page aligned */ | |
390 | if (bdata->node_boot_start == 0 || | |
391 | ffs(bdata->node_boot_start) - PAGE_SHIFT > ffs(BITS_PER_LONG)) | |
392 | gofast = 1; | |
393 | for (i = 0; i < idx; ) { | |
394 | unsigned long v = ~map[i / BITS_PER_LONG]; | |
d41dee36 | 395 | |
1da177e4 | 396 | if (gofast && v == ~0UL) { |
a226f6c8 | 397 | int order; |
1da177e4 | 398 | |
d41dee36 | 399 | page = pfn_to_page(pfn); |
1da177e4 | 400 | count += BITS_PER_LONG; |
1da177e4 | 401 | order = ffs(BITS_PER_LONG) - 1; |
a226f6c8 | 402 | __free_pages_bootmem(page, order); |
1da177e4 LT |
403 | i += BITS_PER_LONG; |
404 | page += BITS_PER_LONG; | |
405 | } else if (v) { | |
406 | unsigned long m; | |
d41dee36 AW |
407 | |
408 | page = pfn_to_page(pfn); | |
1da177e4 LT |
409 | for (m = 1; m && i < idx; m<<=1, page++, i++) { |
410 | if (v & m) { | |
411 | count++; | |
a226f6c8 | 412 | __free_pages_bootmem(page, 0); |
1da177e4 LT |
413 | } |
414 | } | |
415 | } else { | |
f71bf0ca | 416 | i += BITS_PER_LONG; |
1da177e4 | 417 | } |
d41dee36 | 418 | pfn += BITS_PER_LONG; |
1da177e4 LT |
419 | } |
420 | total += count; | |
421 | ||
422 | /* | |
423 | * Now free the allocator bitmap itself, it's not | |
424 | * needed anymore: | |
425 | */ | |
426 | page = virt_to_page(bdata->node_bootmem_map); | |
427 | count = 0; | |
bbc7b92e FBH |
428 | idx = (get_mapsize(bdata) + PAGE_SIZE-1) >> PAGE_SHIFT; |
429 | for (i = 0; i < idx; i++, page++) { | |
a226f6c8 | 430 | __free_pages_bootmem(page, 0); |
bbc7b92e | 431 | count++; |
1da177e4 LT |
432 | } |
433 | total += count; | |
434 | bdata->node_bootmem_map = NULL; | |
435 | ||
436 | return total; | |
437 | } | |
438 | ||
f71bf0ca | 439 | unsigned long __init init_bootmem_node(pg_data_t *pgdat, unsigned long freepfn, |
bb0923a6 | 440 | unsigned long startpfn, unsigned long endpfn) |
1da177e4 | 441 | { |
f71bf0ca | 442 | return init_bootmem_core(pgdat, freepfn, startpfn, endpfn); |
1da177e4 LT |
443 | } |
444 | ||
71c2742f | 445 | int __init reserve_bootmem_node(pg_data_t *pgdat, unsigned long physaddr, |
72a7fe39 | 446 | unsigned long size, int flags) |
1da177e4 | 447 | { |
a5645a61 YL |
448 | int ret; |
449 | ||
450 | ret = can_reserve_bootmem_core(pgdat->bdata, physaddr, size, flags); | |
451 | if (ret < 0) | |
71c2742f | 452 | return -ENOMEM; |
72a7fe39 | 453 | reserve_bootmem_core(pgdat->bdata, physaddr, size, flags); |
71c2742f BW |
454 | |
455 | return 0; | |
1da177e4 LT |
456 | } |
457 | ||
f71bf0ca FBH |
458 | void __init free_bootmem_node(pg_data_t *pgdat, unsigned long physaddr, |
459 | unsigned long size) | |
1da177e4 LT |
460 | { |
461 | free_bootmem_core(pgdat->bdata, physaddr, size); | |
462 | } | |
463 | ||
f71bf0ca | 464 | unsigned long __init free_all_bootmem_node(pg_data_t *pgdat) |
1da177e4 | 465 | { |
04753278 | 466 | register_page_bootmem_info_node(pgdat); |
f71bf0ca | 467 | return free_all_bootmem_core(pgdat); |
1da177e4 LT |
468 | } |
469 | ||
f71bf0ca | 470 | unsigned long __init init_bootmem(unsigned long start, unsigned long pages) |
1da177e4 LT |
471 | { |
472 | max_low_pfn = pages; | |
473 | min_low_pfn = start; | |
f71bf0ca | 474 | return init_bootmem_core(NODE_DATA(0), start, 0, pages); |
1da177e4 LT |
475 | } |
476 | ||
477 | #ifndef CONFIG_HAVE_ARCH_BOOTMEM_NODE | |
72a7fe39 BW |
478 | int __init reserve_bootmem(unsigned long addr, unsigned long size, |
479 | int flags) | |
1da177e4 | 480 | { |
a5645a61 YL |
481 | bootmem_data_t *bdata; |
482 | int ret; | |
483 | ||
484 | list_for_each_entry(bdata, &bdata_list, list) { | |
485 | ret = can_reserve_bootmem_core(bdata, addr, size, flags); | |
486 | if (ret < 0) | |
487 | return ret; | |
488 | } | |
489 | list_for_each_entry(bdata, &bdata_list, list) | |
490 | reserve_bootmem_core(bdata, addr, size, flags); | |
491 | ||
492 | return 0; | |
1da177e4 LT |
493 | } |
494 | #endif /* !CONFIG_HAVE_ARCH_BOOTMEM_NODE */ | |
495 | ||
f71bf0ca | 496 | void __init free_bootmem(unsigned long addr, unsigned long size) |
1da177e4 | 497 | { |
5a982cbc YL |
498 | bootmem_data_t *bdata; |
499 | list_for_each_entry(bdata, &bdata_list, list) | |
500 | free_bootmem_core(bdata, addr, size); | |
1da177e4 LT |
501 | } |
502 | ||
f71bf0ca | 503 | unsigned long __init free_all_bootmem(void) |
1da177e4 | 504 | { |
f71bf0ca | 505 | return free_all_bootmem_core(NODE_DATA(0)); |
1da177e4 LT |
506 | } |
507 | ||
bb0923a6 FBH |
508 | void * __init __alloc_bootmem_nopanic(unsigned long size, unsigned long align, |
509 | unsigned long goal) | |
1da177e4 | 510 | { |
679bc9fb | 511 | bootmem_data_t *bdata; |
1da177e4 LT |
512 | void *ptr; |
513 | ||
f71bf0ca FBH |
514 | list_for_each_entry(bdata, &bdata_list, list) { |
515 | ptr = __alloc_bootmem_core(bdata, size, align, goal, 0); | |
516 | if (ptr) | |
517 | return ptr; | |
518 | } | |
a8062231 AK |
519 | return NULL; |
520 | } | |
1da177e4 | 521 | |
bb0923a6 FBH |
522 | void * __init __alloc_bootmem(unsigned long size, unsigned long align, |
523 | unsigned long goal) | |
a8062231 AK |
524 | { |
525 | void *mem = __alloc_bootmem_nopanic(size,align,goal); | |
f71bf0ca | 526 | |
a8062231 AK |
527 | if (mem) |
528 | return mem; | |
1da177e4 LT |
529 | /* |
530 | * Whoops, we cannot satisfy the allocation request. | |
531 | */ | |
532 | printk(KERN_ALERT "bootmem alloc of %lu bytes failed!\n", size); | |
533 | panic("Out of memory"); | |
534 | return NULL; | |
535 | } | |
536 | ||
281dd25c | 537 | |
bb0923a6 FBH |
538 | void * __init __alloc_bootmem_node(pg_data_t *pgdat, unsigned long size, |
539 | unsigned long align, unsigned long goal) | |
1da177e4 LT |
540 | { |
541 | void *ptr; | |
542 | ||
008857c1 | 543 | ptr = __alloc_bootmem_core(pgdat->bdata, size, align, goal, 0); |
1da177e4 | 544 | if (ptr) |
f71bf0ca | 545 | return ptr; |
1da177e4 | 546 | |
008857c1 | 547 | return __alloc_bootmem(size, align, goal); |
1da177e4 LT |
548 | } |
549 | ||
e70260aa YG |
550 | #ifdef CONFIG_SPARSEMEM |
551 | void * __init alloc_bootmem_section(unsigned long size, | |
552 | unsigned long section_nr) | |
553 | { | |
554 | void *ptr; | |
555 | unsigned long limit, goal, start_nr, end_nr, pfn; | |
556 | struct pglist_data *pgdat; | |
557 | ||
558 | pfn = section_nr_to_pfn(section_nr); | |
559 | goal = PFN_PHYS(pfn); | |
560 | limit = PFN_PHYS(section_nr_to_pfn(section_nr + 1)) - 1; | |
561 | pgdat = NODE_DATA(early_pfn_to_nid(pfn)); | |
562 | ptr = __alloc_bootmem_core(pgdat->bdata, size, SMP_CACHE_BYTES, goal, | |
563 | limit); | |
564 | ||
565 | if (!ptr) | |
566 | return NULL; | |
567 | ||
568 | start_nr = pfn_to_section_nr(PFN_DOWN(__pa(ptr))); | |
569 | end_nr = pfn_to_section_nr(PFN_DOWN(__pa(ptr) + size)); | |
570 | if (start_nr != section_nr || end_nr != section_nr) { | |
571 | printk(KERN_WARNING "alloc_bootmem failed on section %ld.\n", | |
572 | section_nr); | |
573 | free_bootmem_core(pgdat->bdata, __pa(ptr), size); | |
574 | ptr = NULL; | |
575 | } | |
576 | ||
577 | return ptr; | |
578 | } | |
579 | #endif | |
580 | ||
dfd54cbc HC |
581 | #ifndef ARCH_LOW_ADDRESS_LIMIT |
582 | #define ARCH_LOW_ADDRESS_LIMIT 0xffffffffUL | |
583 | #endif | |
008857c1 | 584 | |
bb0923a6 FBH |
585 | void * __init __alloc_bootmem_low(unsigned long size, unsigned long align, |
586 | unsigned long goal) | |
008857c1 | 587 | { |
679bc9fb | 588 | bootmem_data_t *bdata; |
008857c1 RT |
589 | void *ptr; |
590 | ||
f71bf0ca | 591 | list_for_each_entry(bdata, &bdata_list, list) { |
dfd54cbc HC |
592 | ptr = __alloc_bootmem_core(bdata, size, align, goal, |
593 | ARCH_LOW_ADDRESS_LIMIT); | |
f71bf0ca FBH |
594 | if (ptr) |
595 | return ptr; | |
596 | } | |
008857c1 RT |
597 | |
598 | /* | |
599 | * Whoops, we cannot satisfy the allocation request. | |
600 | */ | |
601 | printk(KERN_ALERT "low bootmem alloc of %lu bytes failed!\n", size); | |
602 | panic("Out of low memory"); | |
603 | return NULL; | |
604 | } | |
605 | ||
606 | void * __init __alloc_bootmem_low_node(pg_data_t *pgdat, unsigned long size, | |
607 | unsigned long align, unsigned long goal) | |
608 | { | |
dfd54cbc HC |
609 | return __alloc_bootmem_core(pgdat->bdata, size, align, goal, |
610 | ARCH_LOW_ADDRESS_LIMIT); | |
008857c1 | 611 | } |