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-rw-r--r--include/linux/bootmem.h86
-rw-r--r--mm/bootmem.c356
2 files changed, 222 insertions, 220 deletions
diff --git a/include/linux/bootmem.h b/include/linux/bootmem.h
index f352c5f125b4..5000fd70b04f 100644
--- a/include/linux/bootmem.h
+++ b/include/linux/bootmem.h
@@ -41,36 +41,62 @@ typedef struct bootmem_data {
41extern bootmem_data_t bootmem_node_data[]; 41extern bootmem_data_t bootmem_node_data[];
42 42
43extern unsigned long bootmem_bootmap_pages(unsigned long); 43extern unsigned long bootmem_bootmap_pages(unsigned long);
44
45extern unsigned long init_bootmem_node(pg_data_t *pgdat,
46 unsigned long freepfn,
47 unsigned long startpfn,
48 unsigned long endpfn);
44extern unsigned long init_bootmem(unsigned long addr, unsigned long memend); 49extern unsigned long init_bootmem(unsigned long addr, unsigned long memend);
50
51extern unsigned long free_all_bootmem_node(pg_data_t *pgdat);
52extern unsigned long free_all_bootmem(void);
53
54extern void free_bootmem_node(pg_data_t *pgdat,
55 unsigned long addr,
56 unsigned long size);
45extern void free_bootmem(unsigned long addr, unsigned long size); 57extern void free_bootmem(unsigned long addr, unsigned long size);
46extern void *__alloc_bootmem(unsigned long size, 58
59/*
60 * Flags for reserve_bootmem (also if CONFIG_HAVE_ARCH_BOOTMEM_NODE,
61 * the architecture-specific code should honor this).
62 *
63 * If flags is 0, then the return value is always 0 (success). If
64 * flags contains BOOTMEM_EXCLUSIVE, then -EBUSY is returned if the
65 * memory already was reserved.
66 */
67#define BOOTMEM_DEFAULT 0
68#define BOOTMEM_EXCLUSIVE (1<<0)
69
70extern int reserve_bootmem_node(pg_data_t *pgdat,
71 unsigned long physaddr,
72 unsigned long size,
73 int flags);
74#ifndef CONFIG_HAVE_ARCH_BOOTMEM_NODE
75extern int reserve_bootmem(unsigned long addr, unsigned long size, int flags);
76#endif
77
78extern void *__alloc_bootmem_nopanic(unsigned long size,
47 unsigned long align, 79 unsigned long align,
48 unsigned long goal); 80 unsigned long goal);
49extern void *__alloc_bootmem_nopanic(unsigned long size, 81extern void *__alloc_bootmem(unsigned long size,
50 unsigned long align, 82 unsigned long align,
51 unsigned long goal); 83 unsigned long goal);
52extern void *__alloc_bootmem_low(unsigned long size, 84extern void *__alloc_bootmem_low(unsigned long size,
53 unsigned long align, 85 unsigned long align,
54 unsigned long goal); 86 unsigned long goal);
87extern void *__alloc_bootmem_node(pg_data_t *pgdat,
88 unsigned long size,
89 unsigned long align,
90 unsigned long goal);
91extern void *__alloc_bootmem_node_nopanic(pg_data_t *pgdat,
92 unsigned long size,
93 unsigned long align,
94 unsigned long goal);
55extern void *__alloc_bootmem_low_node(pg_data_t *pgdat, 95extern void *__alloc_bootmem_low_node(pg_data_t *pgdat,
56 unsigned long size, 96 unsigned long size,
57 unsigned long align, 97 unsigned long align,
58 unsigned long goal); 98 unsigned long goal);
59
60/*
61 * flags for reserve_bootmem (also if CONFIG_HAVE_ARCH_BOOTMEM_NODE,
62 * the architecture-specific code should honor this)
63 */
64#define BOOTMEM_DEFAULT 0
65#define BOOTMEM_EXCLUSIVE (1<<0)
66
67#ifndef CONFIG_HAVE_ARCH_BOOTMEM_NODE 99#ifndef CONFIG_HAVE_ARCH_BOOTMEM_NODE
68/*
69 * If flags is 0, then the return value is always 0 (success). If
70 * flags contains BOOTMEM_EXCLUSIVE, then -EBUSY is returned if the
71 * memory already was reserved.
72 */
73extern int reserve_bootmem(unsigned long addr, unsigned long size, int flags);
74#define alloc_bootmem(x) \ 100#define alloc_bootmem(x) \
75 __alloc_bootmem(x, SMP_CACHE_BYTES, __pa(MAX_DMA_ADDRESS)) 101 __alloc_bootmem(x, SMP_CACHE_BYTES, __pa(MAX_DMA_ADDRESS))
76#define alloc_bootmem_low(x) \ 102#define alloc_bootmem_low(x) \
@@ -83,38 +109,16 @@ extern int reserve_bootmem(unsigned long addr, unsigned long size, int flags);
83 109
84extern int reserve_bootmem_generic(unsigned long addr, unsigned long size, 110extern int reserve_bootmem_generic(unsigned long addr, unsigned long size,
85 int flags); 111 int flags);
86extern unsigned long free_all_bootmem(void);
87extern unsigned long free_all_bootmem_node(pg_data_t *pgdat);
88extern void *__alloc_bootmem_node(pg_data_t *pgdat,
89 unsigned long size,
90 unsigned long align,
91 unsigned long goal);
92extern void *__alloc_bootmem_node_nopanic(pg_data_t *pgdat,
93 unsigned long size,
94 unsigned long align,
95 unsigned long goal);
96extern unsigned long init_bootmem_node(pg_data_t *pgdat,
97 unsigned long freepfn,
98 unsigned long startpfn,
99 unsigned long endpfn);
100extern int reserve_bootmem_node(pg_data_t *pgdat,
101 unsigned long physaddr,
102 unsigned long size,
103 int flags);
104extern void free_bootmem_node(pg_data_t *pgdat,
105 unsigned long addr,
106 unsigned long size);
107extern void *alloc_bootmem_section(unsigned long size,
108 unsigned long section_nr);
109 112
110#ifndef CONFIG_HAVE_ARCH_BOOTMEM_NODE
111#define alloc_bootmem_node(pgdat, x) \ 113#define alloc_bootmem_node(pgdat, x) \
112 __alloc_bootmem_node(pgdat, x, SMP_CACHE_BYTES, __pa(MAX_DMA_ADDRESS)) 114 __alloc_bootmem_node(pgdat, x, SMP_CACHE_BYTES, __pa(MAX_DMA_ADDRESS))
113#define alloc_bootmem_pages_node(pgdat, x) \ 115#define alloc_bootmem_pages_node(pgdat, x) \
114 __alloc_bootmem_node(pgdat, x, PAGE_SIZE, __pa(MAX_DMA_ADDRESS)) 116 __alloc_bootmem_node(pgdat, x, PAGE_SIZE, __pa(MAX_DMA_ADDRESS))
115#define alloc_bootmem_low_pages_node(pgdat, x) \ 117#define alloc_bootmem_low_pages_node(pgdat, x) \
116 __alloc_bootmem_low_node(pgdat, x, PAGE_SIZE, 0) 118 __alloc_bootmem_low_node(pgdat, x, PAGE_SIZE, 0)
117#endif /* !CONFIG_HAVE_ARCH_BOOTMEM_NODE */ 119
120extern void *alloc_bootmem_section(unsigned long size,
121 unsigned long section_nr);
118 122
119#ifdef CONFIG_HAVE_ARCH_ALLOC_REMAP 123#ifdef CONFIG_HAVE_ARCH_ALLOC_REMAP
120extern void *alloc_remap(int nid, unsigned long size); 124extern void *alloc_remap(int nid, unsigned long size);
diff --git a/mm/bootmem.c b/mm/bootmem.c
index 9ac972535fff..24eacf52c50e 100644
--- a/mm/bootmem.c
+++ b/mm/bootmem.c
@@ -38,6 +38,19 @@ unsigned long saved_max_pfn;
38 38
39bootmem_data_t bootmem_node_data[MAX_NUMNODES] __initdata; 39bootmem_data_t bootmem_node_data[MAX_NUMNODES] __initdata;
40 40
41/*
42 * Given an initialised bdata, it returns the size of the boot bitmap
43 */
44static 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
41/* return the number of _pages_ that will be allocated for the boot bitmap */ 54/* return the number of _pages_ that will be allocated for the boot bitmap */
42unsigned long __init bootmem_bootmap_pages(unsigned long pages) 55unsigned long __init bootmem_bootmap_pages(unsigned long pages)
43{ 56{
@@ -72,19 +85,6 @@ static void __init link_bootmem(bootmem_data_t *bdata)
72} 85}
73 86
74/* 87/*
75 * Given an initialised bdata, it returns the size of the boot bitmap
76 */
77static unsigned long __init get_mapsize(bootmem_data_t *bdata)
78{
79 unsigned long mapsize;
80 unsigned long start = PFN_DOWN(bdata->node_boot_start);
81 unsigned long end = bdata->node_low_pfn;
82
83 mapsize = ((end - start) + 7) / 8;
84 return ALIGN(mapsize, sizeof(long));
85}
86
87/*
88 * Called once to set up the allocator itself. 88 * Called once to set up the allocator itself.
89 */ 89 */
90static unsigned long __init init_bootmem_core(bootmem_data_t *bdata, 90static unsigned long __init init_bootmem_core(bootmem_data_t *bdata,
@@ -108,6 +108,146 @@ static unsigned long __init init_bootmem_core(bootmem_data_t *bdata,
108 return mapsize; 108 return mapsize;
109} 109}
110 110
111unsigned 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
117unsigned 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
124static 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
189unsigned 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
195unsigned long __init free_all_bootmem(void)
196{
197 return free_all_bootmem_core(NODE_DATA(0)->bdata);
198}
199
200static 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
238void __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
244void __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
111/* 251/*
112 * Marks a particular physical memory range as unallocatable. Usable RAM 252 * Marks a particular physical memory range as unallocatable. Usable RAM
113 * might be used for boot-time allocations - or it might get added 253 * might be used for boot-time allocations - or it might get added
@@ -183,43 +323,36 @@ static void __init reserve_bootmem_core(bootmem_data_t *bdata,
183 } 323 }
184} 324}
185 325
186static void __init free_bootmem_core(bootmem_data_t *bdata, unsigned long addr, 326int __init reserve_bootmem_node(pg_data_t *pgdat, unsigned long physaddr,
187 unsigned long size) 327 unsigned long size, int flags)
188{ 328{
189 unsigned long sidx, eidx; 329 int ret;
190 unsigned long i;
191
192 BUG_ON(!size);
193
194 /* out range */
195 if (addr + size < bdata->node_boot_start ||
196 PFN_DOWN(addr) > bdata->node_low_pfn)
197 return;
198 /*
199 * round down end of usable mem, partially free pages are
200 * considered reserved.
201 */
202
203 if (addr >= bdata->node_boot_start && addr < bdata->last_success)
204 bdata->last_success = addr;
205 330
206 /* 331 ret = can_reserve_bootmem_core(pgdat->bdata, physaddr, size, flags);
207 * Round up to index to the range. 332 if (ret < 0)
208 */ 333 return -ENOMEM;
209 if (PFN_UP(addr) > PFN_DOWN(bdata->node_boot_start)) 334 reserve_bootmem_core(pgdat->bdata, physaddr, size, flags);
210 sidx = PFN_UP(addr) - PFN_DOWN(bdata->node_boot_start); 335 return 0;
211 else 336}
212 sidx = 0;
213 337
214 eidx = PFN_DOWN(addr + size - bdata->node_boot_start); 338#ifndef CONFIG_HAVE_ARCH_BOOTMEM_NODE
215 if (eidx > bdata->node_low_pfn - PFN_DOWN(bdata->node_boot_start)) 339int __init reserve_bootmem(unsigned long addr, unsigned long size,
216 eidx = bdata->node_low_pfn - PFN_DOWN(bdata->node_boot_start); 340 int flags)
341{
342 bootmem_data_t *bdata;
343 int ret;
217 344
218 for (i = sidx; i < eidx; i++) { 345 list_for_each_entry(bdata, &bdata_list, list) {
219 if (unlikely(!test_and_clear_bit(i, bdata->node_bootmem_map))) 346 ret = can_reserve_bootmem_core(bdata, addr, size, flags);
220 BUG(); 347 if (ret < 0)
348 return ret;
221 } 349 }
350 list_for_each_entry(bdata, &bdata_list, list)
351 reserve_bootmem_core(bdata, addr, size, flags);
352
353 return 0;
222} 354}
355#endif /* !CONFIG_HAVE_ARCH_BOOTMEM_NODE */
223 356
224/* 357/*
225 * We 'merge' subsequent allocations to save space. We might 'lose' 358 * We 'merge' subsequent allocations to save space. We might 'lose'
@@ -371,140 +504,6 @@ found:
371 return ret; 504 return ret;
372} 505}
373 506
374static unsigned long __init free_all_bootmem_core(bootmem_data_t *bdata)
375{
376 struct page *page;
377 unsigned long pfn;
378 unsigned long i, count;
379 unsigned long idx;
380 unsigned long *map;
381 int gofast = 0;
382
383 BUG_ON(!bdata->node_bootmem_map);
384
385 count = 0;
386 /* first extant page of the node */
387 pfn = PFN_DOWN(bdata->node_boot_start);
388 idx = bdata->node_low_pfn - pfn;
389 map = bdata->node_bootmem_map;
390 /*
391 * Check if we are aligned to BITS_PER_LONG pages. If so, we might
392 * be able to free page orders of that size at once.
393 */
394 if (!(pfn & (BITS_PER_LONG-1)))
395 gofast = 1;
396
397 for (i = 0; i < idx; ) {
398 unsigned long v = ~map[i / BITS_PER_LONG];
399
400 if (gofast && v == ~0UL) {
401 int order;
402
403 page = pfn_to_page(pfn);
404 count += BITS_PER_LONG;
405 order = ffs(BITS_PER_LONG) - 1;
406 __free_pages_bootmem(page, order);
407 i += BITS_PER_LONG;
408 page += BITS_PER_LONG;
409 } else if (v) {
410 unsigned long m;
411
412 page = pfn_to_page(pfn);
413 for (m = 1; m && i < idx; m<<=1, page++, i++) {
414 if (v & m) {
415 count++;
416 __free_pages_bootmem(page, 0);
417 }
418 }
419 } else {
420 i += BITS_PER_LONG;
421 }
422 pfn += BITS_PER_LONG;
423 }
424
425 /*
426 * Now free the allocator bitmap itself, it's not
427 * needed anymore:
428 */
429 page = virt_to_page(bdata->node_bootmem_map);
430 idx = (get_mapsize(bdata) + PAGE_SIZE-1) >> PAGE_SHIFT;
431 for (i = 0; i < idx; i++, page++)
432 __free_pages_bootmem(page, 0);
433 count += i;
434 bdata->node_bootmem_map = NULL;
435
436 return count;
437}
438
439unsigned long __init init_bootmem_node(pg_data_t *pgdat, unsigned long freepfn,
440 unsigned long startpfn, unsigned long endpfn)
441{
442 return init_bootmem_core(pgdat->bdata, freepfn, startpfn, endpfn);
443}
444
445int __init reserve_bootmem_node(pg_data_t *pgdat, unsigned long physaddr,
446 unsigned long size, int flags)
447{
448 int ret;
449
450 ret = can_reserve_bootmem_core(pgdat->bdata, physaddr, size, flags);
451 if (ret < 0)
452 return -ENOMEM;
453 reserve_bootmem_core(pgdat->bdata, physaddr, size, flags);
454
455 return 0;
456}
457
458void __init free_bootmem_node(pg_data_t *pgdat, unsigned long physaddr,
459 unsigned long size)
460{
461 free_bootmem_core(pgdat->bdata, physaddr, size);
462}
463
464unsigned long __init free_all_bootmem_node(pg_data_t *pgdat)
465{
466 register_page_bootmem_info_node(pgdat);
467 return free_all_bootmem_core(pgdat->bdata);
468}
469
470unsigned long __init init_bootmem(unsigned long start, unsigned long pages)
471{
472 max_low_pfn = pages;
473 min_low_pfn = start;
474 return init_bootmem_core(NODE_DATA(0)->bdata, start, 0, pages);
475}
476
477#ifndef CONFIG_HAVE_ARCH_BOOTMEM_NODE
478int __init reserve_bootmem(unsigned long addr, unsigned long size,
479 int flags)
480{
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;
493}
494#endif /* !CONFIG_HAVE_ARCH_BOOTMEM_NODE */
495
496void __init free_bootmem(unsigned long addr, unsigned long size)
497{
498 bootmem_data_t *bdata;
499 list_for_each_entry(bdata, &bdata_list, list)
500 free_bootmem_core(bdata, addr, size);
501}
502
503unsigned long __init free_all_bootmem(void)
504{
505 return free_all_bootmem_core(NODE_DATA(0)->bdata);
506}
507
508void * __init __alloc_bootmem_nopanic(unsigned long size, unsigned long align, 507void * __init __alloc_bootmem_nopanic(unsigned long size, unsigned long align,
509 unsigned long goal) 508 unsigned long goal)
510{ 509{
@@ -534,7 +533,6 @@ void * __init __alloc_bootmem(unsigned long size, unsigned long align,
534 return NULL; 533 return NULL;
535} 534}
536 535
537
538void * __init __alloc_bootmem_node(pg_data_t *pgdat, unsigned long size, 536void * __init __alloc_bootmem_node(pg_data_t *pgdat, unsigned long size,
539 unsigned long align, unsigned long goal) 537 unsigned long align, unsigned long goal)
540{ 538{
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