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10#include <linux/kernel.h>
11#include <linux/errno.h>
12#include <linux/swap.h>
13#include <linux/init.h>
14#include <linux/bootmem.h>
15#include <linux/mman.h>
16#include <linux/nodemask.h>
17#include <linux/initrd.h>
18#include <linux/highmem.h>
19#include <linux/gfp.h>
20#include <linux/memblock.h>
21#include <linux/sort.h>
22
23#include <asm/mach-types.h>
24#include <asm/sections.h>
25#include <asm/setup.h>
26#include <asm/sizes.h>
27#include <asm/tlb.h>
28#include <asm/fixmap.h>
29
30#include <asm/mach/arch.h>
31#include <asm/mach/map.h>
32
33#include "mm.h"
34
35static unsigned long phys_initrd_start __initdata = 0;
36static unsigned long phys_initrd_size __initdata = 0;
37
38static int __init early_initrd(char *p)
39{
40 unsigned long start, size;
41 char *endp;
42
43 start = memparse(p, &endp);
44 if (*endp == ',') {
45 size = memparse(endp + 1, NULL);
46
47 phys_initrd_start = start;
48 phys_initrd_size = size;
49 }
50 return 0;
51}
52early_param("initrd", early_initrd);
53
54static int __init parse_tag_initrd(const struct tag *tag)
55{
56 printk(KERN_WARNING "ATAG_INITRD is deprecated; "
57 "please update your bootloader.\n");
58 phys_initrd_start = __virt_to_phys(tag->u.initrd.start);
59 phys_initrd_size = tag->u.initrd.size;
60 return 0;
61}
62
63__tagtable(ATAG_INITRD, parse_tag_initrd);
64
65static int __init parse_tag_initrd2(const struct tag *tag)
66{
67 phys_initrd_start = tag->u.initrd.start;
68 phys_initrd_size = tag->u.initrd.size;
69 return 0;
70}
71
72__tagtable(ATAG_INITRD2, parse_tag_initrd2);
73
74
75
76
77
78
79struct meminfo meminfo;
80
81void show_mem(void)
82{
83 int free = 0, total = 0, reserved = 0;
84 int shared = 0, cached = 0, slab = 0, i;
85 struct meminfo * mi = &meminfo;
86
87 printk("Mem-info:\n");
88 show_free_areas();
89
90 for_each_bank (i, mi) {
91 struct membank *bank = &mi->bank[i];
92 unsigned int pfn1, pfn2;
93 struct page *page, *end;
94
95 pfn1 = bank_pfn_start(bank);
96 pfn2 = bank_pfn_end(bank);
97
98 page = pfn_to_page(pfn1);
99 end = pfn_to_page(pfn2 - 1) + 1;
100
101 do {
102 total++;
103 if (PageReserved(page))
104 reserved++;
105 else if (PageSwapCache(page))
106 cached++;
107 else if (PageSlab(page))
108 slab++;
109 else if (!page_count(page))
110 free++;
111 else
112 shared += page_count(page) - 1;
113 page++;
114 } while (page < end);
115 }
116
117 printk("%d pages of RAM\n", total);
118 printk("%d free pages\n", free);
119 printk("%d reserved pages\n", reserved);
120 printk("%d slab pages\n", slab);
121 printk("%d pages shared\n", shared);
122 printk("%d pages swap cached\n", cached);
123}
124
125static void __init find_limits(unsigned long *min, unsigned long *max_low,
126 unsigned long *max_high)
127{
128 struct meminfo *mi = &meminfo;
129 int i;
130
131 *min = -1UL;
132 *max_low = *max_high = 0;
133
134 for_each_bank (i, mi) {
135 struct membank *bank = &mi->bank[i];
136 unsigned long start, end;
137
138 start = bank_pfn_start(bank);
139 end = bank_pfn_end(bank);
140
141 if (*min > start)
142 *min = start;
143 if (*max_high < end)
144 *max_high = end;
145 if (bank->highmem)
146 continue;
147 if (*max_low < end)
148 *max_low = end;
149 }
150}
151
152static void __init arm_bootmem_init(unsigned long start_pfn,
153 unsigned long end_pfn)
154{
155 struct memblock_region *reg;
156 unsigned int boot_pages;
157 phys_addr_t bitmap;
158 pg_data_t *pgdat;
159
160
161
162
163
164 boot_pages = bootmem_bootmap_pages(end_pfn - start_pfn);
165 bitmap = memblock_alloc_base(boot_pages << PAGE_SHIFT, L1_CACHE_BYTES,
166 __pfn_to_phys(end_pfn));
167
168
169
170
171
172 node_set_online(0);
173 pgdat = NODE_DATA(0);
174 init_bootmem_node(pgdat, __phys_to_pfn(bitmap), start_pfn, end_pfn);
175
176
177 for_each_memblock(memory, reg) {
178 unsigned long start = memblock_region_memory_base_pfn(reg);
179 unsigned long end = memblock_region_memory_end_pfn(reg);
180
181 if (end >= end_pfn)
182 end = end_pfn;
183 if (start >= end)
184 break;
185
186 free_bootmem(__pfn_to_phys(start), (end - start) << PAGE_SHIFT);
187 }
188
189
190 for_each_memblock(reserved, reg) {
191 unsigned long start = memblock_region_reserved_base_pfn(reg);
192 unsigned long end = memblock_region_reserved_end_pfn(reg);
193
194 if (end >= end_pfn)
195 end = end_pfn;
196 if (start >= end)
197 break;
198
199 reserve_bootmem(__pfn_to_phys(start),
200 (end - start) << PAGE_SHIFT, BOOTMEM_DEFAULT);
201 }
202}
203
204static void __init arm_bootmem_free(unsigned long min, unsigned long max_low,
205 unsigned long max_high)
206{
207 unsigned long zone_size[MAX_NR_ZONES], zhole_size[MAX_NR_ZONES];
208 struct memblock_region *reg;
209
210
211
212
213 memset(zone_size, 0, sizeof(zone_size));
214
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218
219
220 zone_size[0] = max_low - min;
221#ifdef CONFIG_HIGHMEM
222 zone_size[ZONE_HIGHMEM] = max_high - max_low;
223#endif
224
225
226
227
228
229 memcpy(zhole_size, zone_size, sizeof(zhole_size));
230 for_each_memblock(memory, reg) {
231 unsigned long start = memblock_region_memory_base_pfn(reg);
232 unsigned long end = memblock_region_memory_end_pfn(reg);
233
234 if (start < max_low) {
235 unsigned long low_end = min(end, max_low);
236 zhole_size[0] -= low_end - start;
237 }
238#ifdef CONFIG_HIGHMEM
239 if (end > max_low) {
240 unsigned long high_start = max(start, max_low);
241 zhole_size[ZONE_HIGHMEM] -= end - high_start;
242 }
243#endif
244 }
245
246
247
248
249
250 arch_adjust_zones(zone_size, zhole_size);
251
252 free_area_init_node(0, zone_size, min, zhole_size);
253}
254
255#ifndef CONFIG_SPARSEMEM
256int pfn_valid(unsigned long pfn)
257{
258 return memblock_is_memory(pfn << PAGE_SHIFT);
259}
260EXPORT_SYMBOL(pfn_valid);
261
262static void arm_memory_present(void)
263{
264}
265#else
266static void arm_memory_present(void)
267{
268 struct memblock_region *reg;
269
270 for_each_memblock(memory, reg)
271 memory_present(0, memblock_region_memory_base_pfn(reg),
272 memblock_region_memory_end_pfn(reg));
273}
274#endif
275
276static int __init meminfo_cmp(const void *_a, const void *_b)
277{
278 const struct membank *a = _a, *b = _b;
279 long cmp = bank_pfn_start(a) - bank_pfn_start(b);
280 return cmp < 0 ? -1 : cmp > 0 ? 1 : 0;
281}
282
283void __init arm_memblock_init(struct meminfo *mi, struct machine_desc *mdesc)
284{
285 int i;
286
287 sort(&meminfo.bank, meminfo.nr_banks, sizeof(meminfo.bank[0]), meminfo_cmp, NULL);
288
289 memblock_init();
290 for (i = 0; i < mi->nr_banks; i++)
291 memblock_add(mi->bank[i].start, mi->bank[i].size);
292
293
294#ifdef CONFIG_XIP_KERNEL
295 memblock_reserve(__pa(_sdata), _end - _sdata);
296#else
297 memblock_reserve(__pa(_stext), _end - _stext);
298#endif
299#ifdef CONFIG_BLK_DEV_INITRD
300 if (phys_initrd_size &&
301 memblock_is_region_reserved(phys_initrd_start, phys_initrd_size)) {
302 pr_err("INITRD: 0x%08lx+0x%08lx overlaps in-use memory region - disabling initrd\n",
303 phys_initrd_start, phys_initrd_size);
304 phys_initrd_start = phys_initrd_size = 0;
305 }
306 if (phys_initrd_size) {
307 memblock_reserve(phys_initrd_start, phys_initrd_size);
308
309
310 initrd_start = __phys_to_virt(phys_initrd_start);
311 initrd_end = initrd_start + phys_initrd_size;
312 }
313#endif
314
315 arm_mm_memblock_reserve();
316
317
318 if (mdesc->reserve)
319 mdesc->reserve();
320
321 memblock_analyze();
322 memblock_dump_all();
323}
324
325void __init bootmem_init(void)
326{
327 unsigned long min, max_low, max_high;
328
329 max_low = max_high = 0;
330
331 find_limits(&min, &max_low, &max_high);
332
333 arm_bootmem_init(min, max_low);
334
335
336
337
338
339 arm_memory_present();
340
341
342
343
344 sparse_init();
345
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349
350
351 arm_bootmem_free(min, max_low, max_high);
352
353 high_memory = __va((max_low << PAGE_SHIFT) - 1) + 1;
354
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361
362
363 max_low_pfn = max_low - PHYS_PFN_OFFSET;
364 max_pfn = max_high - PHYS_PFN_OFFSET;
365}
366
367static inline int free_area(unsigned long pfn, unsigned long end, char *s)
368{
369 unsigned int pages = 0, size = (end - pfn) << (PAGE_SHIFT - 10);
370
371 for (; pfn < end; pfn++) {
372 struct page *page = pfn_to_page(pfn);
373 ClearPageReserved(page);
374 init_page_count(page);
375 __free_page(page);
376 pages++;
377 }
378
379 if (size && s)
380 printk(KERN_INFO "Freeing %s memory: %dK\n", s, size);
381
382 return pages;
383}
384
385static inline void
386free_memmap(unsigned long start_pfn, unsigned long end_pfn)
387{
388 struct page *start_pg, *end_pg;
389 unsigned long pg, pgend;
390
391
392
393
394 start_pg = pfn_to_page(start_pfn - 1) + 1;
395 end_pg = pfn_to_page(end_pfn);
396
397
398
399
400
401 pg = PAGE_ALIGN(__pa(start_pg));
402 pgend = __pa(end_pg) & PAGE_MASK;
403
404
405
406
407
408 if (pg < pgend)
409 free_bootmem(pg, pgend - pg);
410}
411
412
413
414
415static void __init free_unused_memmap(struct meminfo *mi)
416{
417 unsigned long bank_start, prev_bank_end = 0;
418 unsigned int i;
419
420
421
422
423
424 for_each_bank(i, mi) {
425 struct membank *bank = &mi->bank[i];
426
427 bank_start = bank_pfn_start(bank);
428
429
430
431
432
433 if (prev_bank_end && prev_bank_end < bank_start)
434 free_memmap(prev_bank_end, bank_start);
435
436
437
438
439
440
441 prev_bank_end = ALIGN(bank_pfn_end(bank), MAX_ORDER_NR_PAGES);
442 }
443}
444
445static void __init free_highpages(void)
446{
447#ifdef CONFIG_HIGHMEM
448 unsigned long max_low = max_low_pfn + PHYS_PFN_OFFSET;
449 struct memblock_region *mem, *res;
450
451
452 for_each_memblock(memory, mem) {
453 unsigned long start = memblock_region_memory_base_pfn(mem);
454 unsigned long end = memblock_region_memory_end_pfn(mem);
455
456
457 if (end <= max_low)
458 continue;
459
460
461 if (start < max_low)
462 start = max_low;
463
464
465 for_each_memblock(reserved, res) {
466 unsigned long res_start, res_end;
467
468 res_start = memblock_region_reserved_base_pfn(res);
469 res_end = memblock_region_reserved_end_pfn(res);
470
471 if (res_end < start)
472 continue;
473 if (res_start < start)
474 res_start = start;
475 if (res_start > end)
476 res_start = end;
477 if (res_end > end)
478 res_end = end;
479 if (res_start != start)
480 totalhigh_pages += free_area(start, res_start,
481 NULL);
482 start = res_end;
483 if (start == end)
484 break;
485 }
486
487
488 if (start < end)
489 totalhigh_pages += free_area(start, end, NULL);
490 }
491 totalram_pages += totalhigh_pages;
492#endif
493}
494
495
496
497
498
499
500void __init mem_init(void)
501{
502 unsigned long reserved_pages, free_pages;
503 struct memblock_region *reg;
504 int i;
505#ifdef CONFIG_HAVE_TCM
506
507 extern u32 dtcm_end;
508 extern u32 itcm_end;
509#endif
510
511 max_mapnr = pfn_to_page(max_pfn + PHYS_PFN_OFFSET) - mem_map;
512
513
514 free_unused_memmap(&meminfo);
515
516 totalram_pages += free_all_bootmem();
517
518#ifdef CONFIG_SA1111
519
520 totalram_pages += free_area(PHYS_PFN_OFFSET,
521 __phys_to_pfn(__pa(swapper_pg_dir)), NULL);
522#endif
523
524 free_highpages();
525
526 reserved_pages = free_pages = 0;
527
528 for_each_bank(i, &meminfo) {
529 struct membank *bank = &meminfo.bank[i];
530 unsigned int pfn1, pfn2;
531 struct page *page, *end;
532
533 pfn1 = bank_pfn_start(bank);
534 pfn2 = bank_pfn_end(bank);
535
536 page = pfn_to_page(pfn1);
537 end = pfn_to_page(pfn2 - 1) + 1;
538
539 do {
540 if (PageReserved(page))
541 reserved_pages++;
542 else if (!page_count(page))
543 free_pages++;
544 page++;
545 } while (page < end);
546 }
547
548
549
550
551
552 printk(KERN_INFO "Memory:");
553 num_physpages = 0;
554 for_each_memblock(memory, reg) {
555 unsigned long pages = memblock_region_memory_end_pfn(reg) -
556 memblock_region_memory_base_pfn(reg);
557 num_physpages += pages;
558 printk(" %ldMB", pages >> (20 - PAGE_SHIFT));
559 }
560 printk(" = %luMB total\n", num_physpages >> (20 - PAGE_SHIFT));
561
562 printk(KERN_NOTICE "Memory: %luk/%luk available, %luk reserved, %luK highmem\n",
563 nr_free_pages() << (PAGE_SHIFT-10),
564 free_pages << (PAGE_SHIFT-10),
565 reserved_pages << (PAGE_SHIFT-10),
566 totalhigh_pages << (PAGE_SHIFT-10));
567
568#define MLK(b, t) b, t, ((t) - (b)) >> 10
569#define MLM(b, t) b, t, ((t) - (b)) >> 20
570#define MLK_ROUNDUP(b, t) b, t, DIV_ROUND_UP(((t) - (b)), SZ_1K)
571
572 printk(KERN_NOTICE "Virtual kernel memory layout:\n"
573 " vector : 0x%08lx - 0x%08lx (%4ld kB)\n"
574#ifdef CONFIG_HAVE_TCM
575 " DTCM : 0x%08lx - 0x%08lx (%4ld kB)\n"
576 " ITCM : 0x%08lx - 0x%08lx (%4ld kB)\n"
577#endif
578 " fixmap : 0x%08lx - 0x%08lx (%4ld kB)\n"
579#ifdef CONFIG_MMU
580 " DMA : 0x%08lx - 0x%08lx (%4ld MB)\n"
581#endif
582 " vmalloc : 0x%08lx - 0x%08lx (%4ld MB)\n"
583 " lowmem : 0x%08lx - 0x%08lx (%4ld MB)\n"
584#ifdef CONFIG_HIGHMEM
585 " pkmap : 0x%08lx - 0x%08lx (%4ld MB)\n"
586#endif
587 " modules : 0x%08lx - 0x%08lx (%4ld MB)\n"
588 " .init : 0x%p" " - 0x%p" " (%4d kB)\n"
589 " .text : 0x%p" " - 0x%p" " (%4d kB)\n"
590 " .data : 0x%p" " - 0x%p" " (%4d kB)\n",
591
592 MLK(UL(CONFIG_VECTORS_BASE), UL(CONFIG_VECTORS_BASE) +
593 (PAGE_SIZE)),
594#ifdef CONFIG_HAVE_TCM
595 MLK(DTCM_OFFSET, (unsigned long) dtcm_end),
596 MLK(ITCM_OFFSET, (unsigned long) itcm_end),
597#endif
598 MLK(FIXADDR_START, FIXADDR_TOP),
599#ifdef CONFIG_MMU
600 MLM(CONSISTENT_BASE, CONSISTENT_END),
601#endif
602 MLM(VMALLOC_START, VMALLOC_END),
603 MLM(PAGE_OFFSET, (unsigned long)high_memory),
604#ifdef CONFIG_HIGHMEM
605 MLM(PKMAP_BASE, (PKMAP_BASE) + (LAST_PKMAP) *
606 (PAGE_SIZE)),
607#endif
608 MLM(MODULES_VADDR, MODULES_END),
609
610 MLK_ROUNDUP(__init_begin, __init_end),
611 MLK_ROUNDUP(_text, _etext),
612 MLK_ROUNDUP(_sdata, _edata));
613
614#undef MLK
615#undef MLM
616#undef MLK_ROUNDUP
617
618
619
620
621
622#ifdef CONFIG_MMU
623 BUILD_BUG_ON(VMALLOC_END > CONSISTENT_BASE);
624 BUG_ON(VMALLOC_END > CONSISTENT_BASE);
625
626 BUILD_BUG_ON(TASK_SIZE > MODULES_VADDR);
627 BUG_ON(TASK_SIZE > MODULES_VADDR);
628#endif
629
630#ifdef CONFIG_HIGHMEM
631 BUILD_BUG_ON(PKMAP_BASE + LAST_PKMAP * PAGE_SIZE > PAGE_OFFSET);
632 BUG_ON(PKMAP_BASE + LAST_PKMAP * PAGE_SIZE > PAGE_OFFSET);
633#endif
634
635 if (PAGE_SIZE >= 16384 && num_physpages <= 128) {
636 extern int sysctl_overcommit_memory;
637
638
639
640
641
642 sysctl_overcommit_memory = OVERCOMMIT_ALWAYS;
643 }
644}
645
646void free_initmem(void)
647{
648#ifdef CONFIG_HAVE_TCM
649 extern char __tcm_start, __tcm_end;
650
651 totalram_pages += free_area(__phys_to_pfn(__pa(&__tcm_start)),
652 __phys_to_pfn(__pa(&__tcm_end)),
653 "TCM link");
654#endif
655
656 if (!machine_is_integrator() && !machine_is_cintegrator())
657 totalram_pages += free_area(__phys_to_pfn(__pa(__init_begin)),
658 __phys_to_pfn(__pa(__init_end)),
659 "init");
660}
661
662#ifdef CONFIG_BLK_DEV_INITRD
663
664static int keep_initrd;
665
666void free_initrd_mem(unsigned long start, unsigned long end)
667{
668 if (!keep_initrd)
669 totalram_pages += free_area(__phys_to_pfn(__pa(start)),
670 __phys_to_pfn(__pa(end)),
671 "initrd");
672}
673
674static int __init keepinitrd_setup(char *__unused)
675{
676 keep_initrd = 1;
677 return 1;
678}
679
680__setup("keepinitrd", keepinitrd_setup);
681#endif
682