1
2
3
4
5
6
7
8
9
10
11#include <linux/init.h>
12#include <linux/pfn.h>
13#include <linux/slab.h>
14#include <linux/bootmem.h>
15#include <linux/export.h>
16#include <linux/kmemleak.h>
17#include <linux/range.h>
18#include <linux/memblock.h>
19
20#include <asm/bug.h>
21#include <asm/io.h>
22#include <asm/processor.h>
23
24#include "internal.h"
25
26#ifndef CONFIG_NEED_MULTIPLE_NODES
27struct pglist_data __refdata contig_page_data;
28EXPORT_SYMBOL(contig_page_data);
29#endif
30
31unsigned long max_low_pfn;
32unsigned long min_low_pfn;
33unsigned long max_pfn;
34
35static void * __init __alloc_memory_core_early(int nid, u64 size, u64 align,
36 u64 goal, u64 limit)
37{
38 void *ptr;
39 u64 addr;
40 ulong flags = choose_memblock_flags();
41
42 if (limit > memblock.current_limit)
43 limit = memblock.current_limit;
44
45again:
46 addr = memblock_find_in_range_node(size, align, goal, limit, nid,
47 flags);
48 if (!addr && (flags & MEMBLOCK_MIRROR)) {
49 flags &= ~MEMBLOCK_MIRROR;
50 pr_warn("Could not allocate %pap bytes of mirrored memory\n",
51 &size);
52 goto again;
53 }
54 if (!addr)
55 return NULL;
56
57 if (memblock_reserve(addr, size))
58 return NULL;
59
60 ptr = phys_to_virt(addr);
61 memset(ptr, 0, size);
62
63
64
65
66 kmemleak_alloc(ptr, size, 0, 0);
67 return ptr;
68}
69
70
71
72
73
74
75
76
77
78
79void __init free_bootmem_late(unsigned long addr, unsigned long size)
80{
81 unsigned long cursor, end;
82
83 kmemleak_free_part(__va(addr), size);
84
85 cursor = PFN_UP(addr);
86 end = PFN_DOWN(addr + size);
87
88 for (; cursor < end; cursor++) {
89 __free_pages_bootmem(pfn_to_page(cursor), cursor, 0);
90 totalram_pages++;
91 }
92}
93
94static void __init __free_pages_memory(unsigned long start, unsigned long end)
95{
96 int order;
97
98 while (start < end) {
99 order = min(MAX_ORDER - 1UL, __ffs(start));
100
101 while (start + (1UL << order) > end)
102 order--;
103
104 __free_pages_bootmem(pfn_to_page(start), start, order);
105
106 start += (1UL << order);
107 }
108}
109
110static unsigned long __init __free_memory_core(phys_addr_t start,
111 phys_addr_t end)
112{
113 unsigned long start_pfn = PFN_UP(start);
114 unsigned long end_pfn = min_t(unsigned long,
115 PFN_DOWN(end), max_low_pfn);
116
117 if (start_pfn > end_pfn)
118 return 0;
119
120 __free_pages_memory(start_pfn, end_pfn);
121
122 return end_pfn - start_pfn;
123}
124
125static unsigned long __init free_low_memory_core_early(void)
126{
127 unsigned long count = 0;
128 phys_addr_t start, end;
129 u64 i;
130
131 memblock_clear_hotplug(0, -1);
132
133 for_each_reserved_mem_region(i, &start, &end)
134 reserve_bootmem_region(start, end);
135
136 for_each_free_mem_range(i, NUMA_NO_NODE, MEMBLOCK_NONE, &start, &end,
137 NULL)
138 count += __free_memory_core(start, end);
139
140#ifdef CONFIG_ARCH_DISCARD_MEMBLOCK
141 {
142 phys_addr_t size;
143
144
145 size = get_allocated_memblock_reserved_regions_info(&start);
146 if (size)
147 count += __free_memory_core(start, start + size);
148
149
150 size = get_allocated_memblock_memory_regions_info(&start);
151 if (size)
152 count += __free_memory_core(start, start + size);
153 }
154#endif
155
156 return count;
157}
158
159static int reset_managed_pages_done __initdata;
160
161void reset_node_managed_pages(pg_data_t *pgdat)
162{
163 struct zone *z;
164
165 for (z = pgdat->node_zones; z < pgdat->node_zones + MAX_NR_ZONES; z++)
166 z->managed_pages = 0;
167}
168
169void __init reset_all_zones_managed_pages(void)
170{
171 struct pglist_data *pgdat;
172
173 if (reset_managed_pages_done)
174 return;
175
176 for_each_online_pgdat(pgdat)
177 reset_node_managed_pages(pgdat);
178
179 reset_managed_pages_done = 1;
180}
181
182
183
184
185
186
187unsigned long __init free_all_bootmem(void)
188{
189 unsigned long pages;
190
191 reset_all_zones_managed_pages();
192
193
194
195
196
197
198 pages = free_low_memory_core_early();
199 totalram_pages += pages;
200
201 return pages;
202}
203
204
205
206
207
208
209
210
211
212
213
214void __init free_bootmem_node(pg_data_t *pgdat, unsigned long physaddr,
215 unsigned long size)
216{
217 memblock_free(physaddr, size);
218}
219
220
221
222
223
224
225
226
227
228
229void __init free_bootmem(unsigned long addr, unsigned long size)
230{
231 memblock_free(addr, size);
232}
233
234static void * __init ___alloc_bootmem_nopanic(unsigned long size,
235 unsigned long align,
236 unsigned long goal,
237 unsigned long limit)
238{
239 void *ptr;
240
241 if (WARN_ON_ONCE(slab_is_available()))
242 return kzalloc(size, GFP_NOWAIT);
243
244restart:
245
246 ptr = __alloc_memory_core_early(NUMA_NO_NODE, size, align, goal, limit);
247
248 if (ptr)
249 return ptr;
250
251 if (goal != 0) {
252 goal = 0;
253 goto restart;
254 }
255
256 return NULL;
257}
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272void * __init __alloc_bootmem_nopanic(unsigned long size, unsigned long align,
273 unsigned long goal)
274{
275 unsigned long limit = -1UL;
276
277 return ___alloc_bootmem_nopanic(size, align, goal, limit);
278}
279
280static void * __init ___alloc_bootmem(unsigned long size, unsigned long align,
281 unsigned long goal, unsigned long limit)
282{
283 void *mem = ___alloc_bootmem_nopanic(size, align, goal, limit);
284
285 if (mem)
286 return mem;
287
288
289
290 printk(KERN_ALERT "bootmem alloc of %lu bytes failed!\n", size);
291 panic("Out of memory");
292 return NULL;
293}
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308void * __init __alloc_bootmem(unsigned long size, unsigned long align,
309 unsigned long goal)
310{
311 unsigned long limit = -1UL;
312
313 return ___alloc_bootmem(size, align, goal, limit);
314}
315
316void * __init ___alloc_bootmem_node_nopanic(pg_data_t *pgdat,
317 unsigned long size,
318 unsigned long align,
319 unsigned long goal,
320 unsigned long limit)
321{
322 void *ptr;
323
324again:
325 ptr = __alloc_memory_core_early(pgdat->node_id, size, align,
326 goal, limit);
327 if (ptr)
328 return ptr;
329
330 ptr = __alloc_memory_core_early(NUMA_NO_NODE, size, align,
331 goal, limit);
332 if (ptr)
333 return ptr;
334
335 if (goal) {
336 goal = 0;
337 goto again;
338 }
339
340 return NULL;
341}
342
343void * __init __alloc_bootmem_node_nopanic(pg_data_t *pgdat, unsigned long size,
344 unsigned long align, unsigned long goal)
345{
346 if (WARN_ON_ONCE(slab_is_available()))
347 return kzalloc_node(size, GFP_NOWAIT, pgdat->node_id);
348
349 return ___alloc_bootmem_node_nopanic(pgdat, size, align, goal, 0);
350}
351
352static void * __init ___alloc_bootmem_node(pg_data_t *pgdat, unsigned long size,
353 unsigned long align, unsigned long goal,
354 unsigned long limit)
355{
356 void *ptr;
357
358 ptr = ___alloc_bootmem_node_nopanic(pgdat, size, align, goal, limit);
359 if (ptr)
360 return ptr;
361
362 printk(KERN_ALERT "bootmem alloc of %lu bytes failed!\n", size);
363 panic("Out of memory");
364 return NULL;
365}
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382void * __init __alloc_bootmem_node(pg_data_t *pgdat, unsigned long size,
383 unsigned long align, unsigned long goal)
384{
385 if (WARN_ON_ONCE(slab_is_available()))
386 return kzalloc_node(size, GFP_NOWAIT, pgdat->node_id);
387
388 return ___alloc_bootmem_node(pgdat, size, align, goal, 0);
389}
390
391void * __init __alloc_bootmem_node_high(pg_data_t *pgdat, unsigned long size,
392 unsigned long align, unsigned long goal)
393{
394 return __alloc_bootmem_node(pgdat, size, align, goal);
395}
396
397#ifndef ARCH_LOW_ADDRESS_LIMIT
398#define ARCH_LOW_ADDRESS_LIMIT 0xffffffffUL
399#endif
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414void * __init __alloc_bootmem_low(unsigned long size, unsigned long align,
415 unsigned long goal)
416{
417 return ___alloc_bootmem(size, align, goal, ARCH_LOW_ADDRESS_LIMIT);
418}
419
420void * __init __alloc_bootmem_low_nopanic(unsigned long size,
421 unsigned long align,
422 unsigned long goal)
423{
424 return ___alloc_bootmem_nopanic(size, align, goal,
425 ARCH_LOW_ADDRESS_LIMIT);
426}
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443void * __init __alloc_bootmem_low_node(pg_data_t *pgdat, unsigned long size,
444 unsigned long align, unsigned long goal)
445{
446 if (WARN_ON_ONCE(slab_is_available()))
447 return kzalloc_node(size, GFP_NOWAIT, pgdat->node_id);
448
449 return ___alloc_bootmem_node(pgdat, size, align, goal,
450 ARCH_LOW_ADDRESS_LIMIT);
451}
452