Commit | Line | Data |
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1da177e4 LT |
1 | /* |
2 | * linux/arch/arm/mm/init.c | |
3 | * | |
90072059 | 4 | * Copyright (C) 1995-2005 Russell King |
1da177e4 LT |
5 | * |
6 | * This program is free software; you can redistribute it and/or modify | |
7 | * it under the terms of the GNU General Public License version 2 as | |
8 | * published by the Free Software Foundation. | |
9 | */ | |
1da177e4 LT |
10 | #include <linux/kernel.h> |
11 | #include <linux/errno.h> | |
1da177e4 LT |
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> | |
3835f6cb | 18 | #include <linux/highmem.h> |
5a0e3ad6 | 19 | #include <linux/gfp.h> |
2778f620 | 20 | #include <linux/memblock.h> |
7dc50ec7 | 21 | #include <linux/sort.h> |
1da177e4 LT |
22 | |
23 | #include <asm/mach-types.h> | |
37efe642 | 24 | #include <asm/sections.h> |
1da177e4 | 25 | #include <asm/setup.h> |
74d02fb9 | 26 | #include <asm/sizes.h> |
1da177e4 | 27 | #include <asm/tlb.h> |
db9ef1af | 28 | #include <asm/fixmap.h> |
1da177e4 LT |
29 | |
30 | #include <asm/mach/arch.h> | |
31 | #include <asm/mach/map.h> | |
32 | ||
1b2e2b73 RK |
33 | #include "mm.h" |
34 | ||
012d1f4a RK |
35 | static unsigned long phys_initrd_start __initdata = 0; |
36 | static unsigned long phys_initrd_size __initdata = 0; | |
37 | ||
2b0d8c25 | 38 | static int __init early_initrd(char *p) |
012d1f4a RK |
39 | { |
40 | unsigned long start, size; | |
2b0d8c25 | 41 | char *endp; |
012d1f4a | 42 | |
2b0d8c25 JK |
43 | start = memparse(p, &endp); |
44 | if (*endp == ',') { | |
45 | size = memparse(endp + 1, NULL); | |
012d1f4a RK |
46 | |
47 | phys_initrd_start = start; | |
48 | phys_initrd_size = size; | |
49 | } | |
2b0d8c25 | 50 | return 0; |
012d1f4a | 51 | } |
2b0d8c25 | 52 | early_param("initrd", early_initrd); |
012d1f4a RK |
53 | |
54 | static 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 | ||
65 | static 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); | |
1da177e4 LT |
73 | |
74 | /* | |
4b5f32ce NP |
75 | * This keeps memory configuration data used by a couple memory |
76 | * initialization functions, as well as show_mem() for the skipping | |
77 | * of holes in the memory map. It is populated by arm_add_memory(). | |
1da177e4 | 78 | */ |
4b5f32ce | 79 | struct meminfo meminfo; |
5e709827 | 80 | |
b2b755b5 | 81 | void show_mem(unsigned int filter) |
1da177e4 LT |
82 | { |
83 | int free = 0, total = 0, reserved = 0; | |
be370302 | 84 | int shared = 0, cached = 0, slab = 0, i; |
5e709827 | 85 | struct meminfo * mi = &meminfo; |
1da177e4 LT |
86 | |
87 | printk("Mem-info:\n"); | |
88 | show_free_areas(); | |
be370302 RK |
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); | |
1da177e4 LT |
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 | ||
f25b4b4c RK |
125 | static void __init find_limits(unsigned long *min, unsigned long *max_low, |
126 | unsigned long *max_high) | |
dde5828f | 127 | { |
f25b4b4c | 128 | struct meminfo *mi = &meminfo; |
dde5828f RK |
129 | int i; |
130 | ||
131 | *min = -1UL; | |
132 | *max_low = *max_high = 0; | |
133 | ||
be370302 | 134 | for_each_bank (i, mi) { |
dde5828f RK |
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 | ||
a801d276 RK |
152 | static void __init arm_bootmem_init(unsigned long start_pfn, |
153 | unsigned long end_pfn) | |
1da177e4 | 154 | { |
719c1514 | 155 | struct memblock_region *reg; |
90072059 | 156 | unsigned int boot_pages; |
2778f620 | 157 | phys_addr_t bitmap; |
90072059 | 158 | pg_data_t *pgdat; |
1da177e4 | 159 | |
90072059 | 160 | /* |
2778f620 RK |
161 | * Allocate the bootmem bitmap page. This must be in a region |
162 | * of memory which has already been mapped. | |
90072059 RK |
163 | */ |
164 | boot_pages = bootmem_bootmap_pages(end_pfn - start_pfn); | |
2778f620 RK |
165 | bitmap = memblock_alloc_base(boot_pages << PAGE_SHIFT, L1_CACHE_BYTES, |
166 | __pfn_to_phys(end_pfn)); | |
1da177e4 | 167 | |
90072059 | 168 | /* |
be370302 | 169 | * Initialise the bootmem allocator, handing the |
90072059 RK |
170 | * memory banks over to bootmem. |
171 | */ | |
be370302 RK |
172 | node_set_online(0); |
173 | pgdat = NODE_DATA(0); | |
2778f620 | 174 | init_bootmem_node(pgdat, __phys_to_pfn(bitmap), start_pfn, end_pfn); |
1da177e4 | 175 | |
a801d276 RK |
176 | /* Free the lowmem regions from memblock into bootmem. */ |
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); | |
d2a38ef9 | 187 | } |
90072059 | 188 | |
a801d276 | 189 | /* Reserve the lowmem memblock reserved regions in bootmem. */ |
719c1514 | 190 | for_each_memblock(reserved, reg) { |
a801d276 RK |
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); | |
1da177e4 | 201 | } |
b7a69ac3 RK |
202 | } |
203 | ||
a2c54d2a RK |
204 | static void __init arm_bootmem_free(unsigned long min, unsigned long max_low, |
205 | unsigned long max_high) | |
b7a69ac3 RK |
206 | { |
207 | unsigned long zone_size[MAX_NR_ZONES], zhole_size[MAX_NR_ZONES]; | |
a2c54d2a | 208 | struct memblock_region *reg; |
b7a69ac3 | 209 | |
90072059 | 210 | /* |
be370302 | 211 | * initialise the zones. |
90072059 RK |
212 | */ |
213 | memset(zone_size, 0, sizeof(zone_size)); | |
90072059 RK |
214 | |
215 | /* | |
be370302 RK |
216 | * The memory size has already been determined. If we need |
217 | * to do anything fancy with the allocation of this memory | |
218 | * to the zones, now is the time to do it. | |
90072059 | 219 | */ |
dde5828f RK |
220 | zone_size[0] = max_low - min; |
221 | #ifdef CONFIG_HIGHMEM | |
222 | zone_size[ZONE_HIGHMEM] = max_high - max_low; | |
223 | #endif | |
90072059 RK |
224 | |
225 | /* | |
be370302 RK |
226 | * Calculate the size of the holes. |
227 | * holes = node_size - sum(bank_sizes) | |
90072059 | 228 | */ |
dde5828f | 229 | memcpy(zhole_size, zone_size, sizeof(zhole_size)); |
a2c54d2a RK |
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 | } | |
dde5828f | 238 | #ifdef CONFIG_HIGHMEM |
a2c54d2a RK |
239 | if (end > max_low) { |
240 | unsigned long high_start = max(start, max_low); | |
241 | zhole_size[ZONE_HIGHMEM] -= end - high_start; | |
242 | } | |
dde5828f | 243 | #endif |
dde5828f | 244 | } |
90072059 RK |
245 | |
246 | /* | |
247 | * Adjust the sizes according to any special requirements for | |
248 | * this machine type. | |
249 | */ | |
b65b4781 | 250 | arch_adjust_zones(zone_size, zhole_size); |
90072059 | 251 | |
be370302 | 252 | free_area_init_node(0, zone_size, min, zhole_size); |
1da177e4 LT |
253 | } |
254 | ||
b7cfda9f RK |
255 | #ifndef CONFIG_SPARSEMEM |
256 | int pfn_valid(unsigned long pfn) | |
257 | { | |
5e6f6aa1 | 258 | return memblock_is_memory(pfn << PAGE_SHIFT); |
b7cfda9f RK |
259 | } |
260 | EXPORT_SYMBOL(pfn_valid); | |
657e12fd | 261 | |
eda2e5dc | 262 | static void arm_memory_present(void) |
657e12fd RK |
263 | { |
264 | } | |
265 | #else | |
eda2e5dc | 266 | static void arm_memory_present(void) |
657e12fd | 267 | { |
719c1514 | 268 | struct memblock_region *reg; |
719c1514 | 269 | |
7c996361 | 270 | for_each_memblock(memory, reg) |
c7fc2de0 YL |
271 | memory_present(0, memblock_region_memory_base_pfn(reg), |
272 | memblock_region_memory_end_pfn(reg)); | |
657e12fd | 273 | } |
b7cfda9f RK |
274 | #endif |
275 | ||
7dc50ec7 RK |
276 | static 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 | ||
8d717a52 | 283 | void __init arm_memblock_init(struct meminfo *mi, struct machine_desc *mdesc) |
2778f620 RK |
284 | { |
285 | int i; | |
286 | ||
7dc50ec7 RK |
287 | sort(&meminfo.bank, meminfo.nr_banks, sizeof(meminfo.bank[0]), meminfo_cmp, NULL); |
288 | ||
2778f620 RK |
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 | /* Register the kernel text, kernel data and initrd with memblock. */ | |
294 | #ifdef CONFIG_XIP_KERNEL | |
842eab40 | 295 | memblock_reserve(__pa(_sdata), _end - _sdata); |
2778f620 RK |
296 | #else |
297 | memblock_reserve(__pa(_stext), _end - _stext); | |
298 | #endif | |
299 | #ifdef CONFIG_BLK_DEV_INITRD | |
b0a2679d RK |
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 | } | |
2778f620 RK |
306 | if (phys_initrd_size) { |
307 | memblock_reserve(phys_initrd_start, phys_initrd_size); | |
308 | ||
309 | /* Now convert initrd to virtual addresses */ | |
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 | ||
8d717a52 RK |
317 | /* reserve any platform specific memblock areas */ |
318 | if (mdesc->reserve) | |
319 | mdesc->reserve(); | |
320 | ||
2778f620 RK |
321 | memblock_analyze(); |
322 | memblock_dump_all(); | |
323 | } | |
324 | ||
8d717a52 | 325 | void __init bootmem_init(void) |
1da177e4 | 326 | { |
dde5828f | 327 | unsigned long min, max_low, max_high; |
1da177e4 | 328 | |
dde5828f RK |
329 | max_low = max_high = 0; |
330 | ||
f25b4b4c | 331 | find_limits(&min, &max_low, &max_high); |
dde5828f | 332 | |
a801d276 | 333 | arm_bootmem_init(min, max_low); |
dde5828f | 334 | |
be370302 RK |
335 | /* |
336 | * Sparsemem tries to allocate bootmem in memory_present(), | |
337 | * so must be done after the fixed reservations | |
338 | */ | |
eda2e5dc | 339 | arm_memory_present(); |
1da177e4 | 340 | |
b7a69ac3 RK |
341 | /* |
342 | * sparse_init() needs the bootmem allocator up and running. | |
343 | */ | |
344 | sparse_init(); | |
345 | ||
346 | /* | |
be370302 | 347 | * Now free the memory - free_area_init_node needs |
b7a69ac3 RK |
348 | * the sparse mem_map arrays initialized by sparse_init() |
349 | * for memmap_init_zone(), otherwise all PFNs are invalid. | |
350 | */ | |
a2c54d2a | 351 | arm_bootmem_free(min, max_low, max_high); |
b7a69ac3 | 352 | |
cae6292b | 353 | high_memory = __va(((phys_addr_t)max_low << PAGE_SHIFT) - 1) + 1; |
1da177e4 | 354 | |
90072059 RK |
355 | /* |
356 | * This doesn't seem to be used by the Linux memory manager any | |
357 | * more, but is used by ll_rw_block. If we can get rid of it, we | |
358 | * also get rid of some of the stuff above as well. | |
359 | * | |
360 | * Note: max_low_pfn and max_pfn reflect the number of _pages_ in | |
361 | * the system, not the maximum PFN. | |
362 | */ | |
dde5828f RK |
363 | max_low_pfn = max_low - PHYS_PFN_OFFSET; |
364 | max_pfn = max_high - PHYS_PFN_OFFSET; | |
90072059 | 365 | } |
1da177e4 | 366 | |
6db015e4 | 367 | static inline int free_area(unsigned long pfn, unsigned long end, char *s) |
1da177e4 | 368 | { |
6db015e4 | 369 | unsigned int pages = 0, size = (end - pfn) << (PAGE_SHIFT - 10); |
1da177e4 | 370 | |
6db015e4 NP |
371 | for (; pfn < end; pfn++) { |
372 | struct page *page = pfn_to_page(pfn); | |
1da177e4 | 373 | ClearPageReserved(page); |
7835e98b | 374 | init_page_count(page); |
6db015e4 NP |
375 | __free_page(page); |
376 | pages++; | |
1da177e4 LT |
377 | } |
378 | ||
379 | if (size && s) | |
380 | printk(KERN_INFO "Freeing %s memory: %dK\n", s, size); | |
6db015e4 NP |
381 | |
382 | return pages; | |
1da177e4 LT |
383 | } |
384 | ||
a013053d | 385 | static inline void |
be370302 | 386 | free_memmap(unsigned long start_pfn, unsigned long end_pfn) |
a013053d RK |
387 | { |
388 | struct page *start_pg, *end_pg; | |
389 | unsigned long pg, pgend; | |
390 | ||
391 | /* | |
392 | * Convert start_pfn/end_pfn to a struct page pointer. | |
393 | */ | |
3257f43d | 394 | start_pg = pfn_to_page(start_pfn - 1) + 1; |
9af386c8 | 395 | end_pg = pfn_to_page(end_pfn - 1) + 1; |
a013053d RK |
396 | |
397 | /* | |
398 | * Convert to physical addresses, and | |
399 | * round start upwards and end downwards. | |
400 | */ | |
cae6292b WD |
401 | pg = (unsigned long)PAGE_ALIGN(__pa(start_pg)); |
402 | pgend = (unsigned long)__pa(end_pg) & PAGE_MASK; | |
a013053d RK |
403 | |
404 | /* | |
405 | * If there are free pages between these, | |
406 | * free the section of the memmap array. | |
407 | */ | |
408 | if (pg < pgend) | |
be370302 | 409 | free_bootmem(pg, pgend - pg); |
a013053d RK |
410 | } |
411 | ||
412 | /* | |
413 | * The mem_map array can get very big. Free the unused area of the memory map. | |
414 | */ | |
be370302 | 415 | static void __init free_unused_memmap(struct meminfo *mi) |
a013053d RK |
416 | { |
417 | unsigned long bank_start, prev_bank_end = 0; | |
418 | unsigned int i; | |
419 | ||
420 | /* | |
3260e529 MB |
421 | * This relies on each bank being in address order. |
422 | * The banks are sorted previously in bootmem_init(). | |
a013053d | 423 | */ |
be370302 | 424 | for_each_bank(i, mi) { |
d2a38ef9 RK |
425 | struct membank *bank = &mi->bank[i]; |
426 | ||
427 | bank_start = bank_pfn_start(bank); | |
a013053d | 428 | |
9af386c8 WD |
429 | #ifdef CONFIG_SPARSEMEM |
430 | /* | |
431 | * Take care not to free memmap entries that don't exist | |
432 | * due to SPARSEMEM sections which aren't present. | |
433 | */ | |
434 | bank_start = min(bank_start, | |
435 | ALIGN(prev_bank_end, PAGES_PER_SECTION)); | |
436 | #endif | |
a013053d RK |
437 | /* |
438 | * If we had a previous bank, and there is a space | |
439 | * between the current bank and the previous, free it. | |
440 | */ | |
3260e529 | 441 | if (prev_bank_end && prev_bank_end < bank_start) |
be370302 | 442 | free_memmap(prev_bank_end, bank_start); |
a013053d | 443 | |
3260e529 MB |
444 | /* |
445 | * Align up here since the VM subsystem insists that the | |
446 | * memmap entries are valid from the bank end aligned to | |
447 | * MAX_ORDER_NR_PAGES. | |
448 | */ | |
449 | prev_bank_end = ALIGN(bank_pfn_end(bank), MAX_ORDER_NR_PAGES); | |
a013053d | 450 | } |
9af386c8 WD |
451 | |
452 | #ifdef CONFIG_SPARSEMEM | |
453 | if (!IS_ALIGNED(prev_bank_end, PAGES_PER_SECTION)) | |
454 | free_memmap(prev_bank_end, | |
455 | ALIGN(prev_bank_end, PAGES_PER_SECTION)); | |
456 | #endif | |
a013053d RK |
457 | } |
458 | ||
d0e775af RK |
459 | static void __init free_highpages(void) |
460 | { | |
461 | #ifdef CONFIG_HIGHMEM | |
df4f14c7 RK |
462 | unsigned long max_low = max_low_pfn + PHYS_PFN_OFFSET; |
463 | struct memblock_region *mem, *res; | |
d0e775af RK |
464 | |
465 | /* set highmem page free */ | |
df4f14c7 RK |
466 | for_each_memblock(memory, mem) { |
467 | unsigned long start = memblock_region_memory_base_pfn(mem); | |
468 | unsigned long end = memblock_region_memory_end_pfn(mem); | |
469 | ||
470 | /* Ignore complete lowmem entries */ | |
471 | if (end <= max_low) | |
472 | continue; | |
473 | ||
474 | /* Truncate partial highmem entries */ | |
475 | if (start < max_low) | |
476 | start = max_low; | |
477 | ||
478 | /* Find and exclude any reserved regions */ | |
479 | for_each_memblock(reserved, res) { | |
480 | unsigned long res_start, res_end; | |
481 | ||
482 | res_start = memblock_region_reserved_base_pfn(res); | |
483 | res_end = memblock_region_reserved_end_pfn(res); | |
484 | ||
485 | if (res_end < start) | |
486 | continue; | |
487 | if (res_start < start) | |
488 | res_start = start; | |
489 | if (res_start > end) | |
490 | res_start = end; | |
491 | if (res_end > end) | |
492 | res_end = end; | |
493 | if (res_start != start) | |
494 | totalhigh_pages += free_area(start, res_start, | |
495 | NULL); | |
496 | start = res_end; | |
497 | if (start == end) | |
498 | break; | |
499 | } | |
500 | ||
501 | /* And now free anything which remains */ | |
502 | if (start < end) | |
d0e775af RK |
503 | totalhigh_pages += free_area(start, end, NULL); |
504 | } | |
505 | totalram_pages += totalhigh_pages; | |
506 | #endif | |
507 | } | |
508 | ||
1da177e4 LT |
509 | /* |
510 | * mem_init() marks the free areas in the mem_map and tells us how much | |
511 | * memory is free. This is done after various parts of the system have | |
512 | * claimed their memory after the kernel image. | |
513 | */ | |
514 | void __init mem_init(void) | |
515 | { | |
db9ef1af | 516 | unsigned long reserved_pages, free_pages; |
47ea3c15 | 517 | struct memblock_region *reg; |
be370302 | 518 | int i; |
1dbd30e9 LW |
519 | #ifdef CONFIG_HAVE_TCM |
520 | /* These pointers are filled in on TCM detection */ | |
521 | extern u32 dtcm_end; | |
522 | extern u32 itcm_end; | |
523 | #endif | |
1da177e4 | 524 | |
3835f6cb | 525 | max_mapnr = pfn_to_page(max_pfn + PHYS_PFN_OFFSET) - mem_map; |
1da177e4 | 526 | |
1da177e4 | 527 | /* this will put all unused low memory onto the freelists */ |
be370302 | 528 | free_unused_memmap(&meminfo); |
a013053d | 529 | |
be370302 | 530 | totalram_pages += free_all_bootmem(); |
1da177e4 LT |
531 | |
532 | #ifdef CONFIG_SA1111 | |
533 | /* now that our DMA memory is actually so designated, we can free it */ | |
6db015e4 NP |
534 | totalram_pages += free_area(PHYS_PFN_OFFSET, |
535 | __phys_to_pfn(__pa(swapper_pg_dir)), NULL); | |
1da177e4 LT |
536 | #endif |
537 | ||
d0e775af | 538 | free_highpages(); |
3835f6cb | 539 | |
db9ef1af FB |
540 | reserved_pages = free_pages = 0; |
541 | ||
be370302 RK |
542 | for_each_bank(i, &meminfo) { |
543 | struct membank *bank = &meminfo.bank[i]; | |
544 | unsigned int pfn1, pfn2; | |
545 | struct page *page, *end; | |
546 | ||
547 | pfn1 = bank_pfn_start(bank); | |
548 | pfn2 = bank_pfn_end(bank); | |
549 | ||
550 | page = pfn_to_page(pfn1); | |
551 | end = pfn_to_page(pfn2 - 1) + 1; | |
552 | ||
553 | do { | |
554 | if (PageReserved(page)) | |
555 | reserved_pages++; | |
556 | else if (!page_count(page)) | |
557 | free_pages++; | |
558 | page++; | |
559 | } while (page < end); | |
db9ef1af FB |
560 | } |
561 | ||
1da177e4 LT |
562 | /* |
563 | * Since our memory may not be contiguous, calculate the | |
564 | * real number of pages we have in this system | |
565 | */ | |
566 | printk(KERN_INFO "Memory:"); | |
1da177e4 | 567 | num_physpages = 0; |
47ea3c15 RK |
568 | for_each_memblock(memory, reg) { |
569 | unsigned long pages = memblock_region_memory_end_pfn(reg) - | |
570 | memblock_region_memory_base_pfn(reg); | |
571 | num_physpages += pages; | |
572 | printk(" %ldMB", pages >> (20 - PAGE_SHIFT)); | |
1da177e4 | 573 | } |
1da177e4 | 574 | printk(" = %luMB total\n", num_physpages >> (20 - PAGE_SHIFT)); |
6db015e4 | 575 | |
db9ef1af FB |
576 | printk(KERN_NOTICE "Memory: %luk/%luk available, %luk reserved, %luK highmem\n", |
577 | nr_free_pages() << (PAGE_SHIFT-10), | |
578 | free_pages << (PAGE_SHIFT-10), | |
579 | reserved_pages << (PAGE_SHIFT-10), | |
4b529401 | 580 | totalhigh_pages << (PAGE_SHIFT-10)); |
1da177e4 | 581 | |
db9ef1af FB |
582 | #define MLK(b, t) b, t, ((t) - (b)) >> 10 |
583 | #define MLM(b, t) b, t, ((t) - (b)) >> 20 | |
584 | #define MLK_ROUNDUP(b, t) b, t, DIV_ROUND_UP(((t) - (b)), SZ_1K) | |
585 | ||
586 | printk(KERN_NOTICE "Virtual kernel memory layout:\n" | |
587 | " vector : 0x%08lx - 0x%08lx (%4ld kB)\n" | |
07d2a5c7 | 588 | #ifdef CONFIG_HAVE_TCM |
07d2a5c7 | 589 | " DTCM : 0x%08lx - 0x%08lx (%4ld kB)\n" |
07d2a5c7 | 590 | " ITCM : 0x%08lx - 0x%08lx (%4ld kB)\n" |
07d2a5c7 | 591 | #endif |
db9ef1af | 592 | " fixmap : 0x%08lx - 0x%08lx (%4ld kB)\n" |
a7bd08c8 FB |
593 | #ifdef CONFIG_MMU |
594 | " DMA : 0x%08lx - 0x%08lx (%4ld MB)\n" | |
595 | #endif | |
db9ef1af FB |
596 | " vmalloc : 0x%08lx - 0x%08lx (%4ld MB)\n" |
597 | " lowmem : 0x%08lx - 0x%08lx (%4ld MB)\n" | |
598 | #ifdef CONFIG_HIGHMEM | |
599 | " pkmap : 0x%08lx - 0x%08lx (%4ld MB)\n" | |
600 | #endif | |
601 | " modules : 0x%08lx - 0x%08lx (%4ld MB)\n" | |
602 | " .init : 0x%p" " - 0x%p" " (%4d kB)\n" | |
603 | " .text : 0x%p" " - 0x%p" " (%4d kB)\n" | |
604 | " .data : 0x%p" " - 0x%p" " (%4d kB)\n", | |
605 | ||
606 | MLK(UL(CONFIG_VECTORS_BASE), UL(CONFIG_VECTORS_BASE) + | |
607 | (PAGE_SIZE)), | |
07d2a5c7 | 608 | #ifdef CONFIG_HAVE_TCM |
1dbd30e9 LW |
609 | MLK(DTCM_OFFSET, (unsigned long) dtcm_end), |
610 | MLK(ITCM_OFFSET, (unsigned long) itcm_end), | |
07d2a5c7 | 611 | #endif |
db9ef1af | 612 | MLK(FIXADDR_START, FIXADDR_TOP), |
a7bd08c8 FB |
613 | #ifdef CONFIG_MMU |
614 | MLM(CONSISTENT_BASE, CONSISTENT_END), | |
615 | #endif | |
c931b4f6 | 616 | MLM(VMALLOC_START, VMALLOC_END), |
db9ef1af FB |
617 | MLM(PAGE_OFFSET, (unsigned long)high_memory), |
618 | #ifdef CONFIG_HIGHMEM | |
619 | MLM(PKMAP_BASE, (PKMAP_BASE) + (LAST_PKMAP) * | |
620 | (PAGE_SIZE)), | |
621 | #endif | |
622 | MLM(MODULES_VADDR, MODULES_END), | |
623 | ||
624 | MLK_ROUNDUP(__init_begin, __init_end), | |
625 | MLK_ROUNDUP(_text, _etext), | |
842eab40 | 626 | MLK_ROUNDUP(_sdata, _edata)); |
db9ef1af FB |
627 | |
628 | #undef MLK | |
629 | #undef MLM | |
630 | #undef MLK_ROUNDUP | |
631 | ||
a1839272 FB |
632 | /* |
633 | * Check boundaries twice: Some fundamental inconsistencies can | |
634 | * be detected at build time already. | |
635 | */ | |
636 | #ifdef CONFIG_MMU | |
637 | BUILD_BUG_ON(VMALLOC_END > CONSISTENT_BASE); | |
638 | BUG_ON(VMALLOC_END > CONSISTENT_BASE); | |
639 | ||
640 | BUILD_BUG_ON(TASK_SIZE > MODULES_VADDR); | |
641 | BUG_ON(TASK_SIZE > MODULES_VADDR); | |
642 | #endif | |
643 | ||
644 | #ifdef CONFIG_HIGHMEM | |
645 | BUILD_BUG_ON(PKMAP_BASE + LAST_PKMAP * PAGE_SIZE > PAGE_OFFSET); | |
646 | BUG_ON(PKMAP_BASE + LAST_PKMAP * PAGE_SIZE > PAGE_OFFSET); | |
647 | #endif | |
648 | ||
1da177e4 LT |
649 | if (PAGE_SIZE >= 16384 && num_physpages <= 128) { |
650 | extern int sysctl_overcommit_memory; | |
651 | /* | |
652 | * On a machine this small we won't get | |
653 | * anywhere without overcommit, so turn | |
654 | * it on by default. | |
655 | */ | |
656 | sysctl_overcommit_memory = OVERCOMMIT_ALWAYS; | |
657 | } | |
658 | } | |
659 | ||
660 | void free_initmem(void) | |
661 | { | |
bc581770 | 662 | #ifdef CONFIG_HAVE_TCM |
ea208f64 | 663 | extern char __tcm_start, __tcm_end; |
bc581770 | 664 | |
ea208f64 LW |
665 | totalram_pages += free_area(__phys_to_pfn(__pa(&__tcm_start)), |
666 | __phys_to_pfn(__pa(&__tcm_end)), | |
bc581770 LW |
667 | "TCM link"); |
668 | #endif | |
669 | ||
6db015e4 | 670 | if (!machine_is_integrator() && !machine_is_cintegrator()) |
37efe642 RK |
671 | totalram_pages += free_area(__phys_to_pfn(__pa(__init_begin)), |
672 | __phys_to_pfn(__pa(__init_end)), | |
6db015e4 | 673 | "init"); |
1da177e4 LT |
674 | } |
675 | ||
676 | #ifdef CONFIG_BLK_DEV_INITRD | |
677 | ||
678 | static int keep_initrd; | |
679 | ||
680 | void free_initrd_mem(unsigned long start, unsigned long end) | |
681 | { | |
682 | if (!keep_initrd) | |
6db015e4 NP |
683 | totalram_pages += free_area(__phys_to_pfn(__pa(start)), |
684 | __phys_to_pfn(__pa(end)), | |
685 | "initrd"); | |
1da177e4 LT |
686 | } |
687 | ||
688 | static int __init keepinitrd_setup(char *__unused) | |
689 | { | |
690 | keep_initrd = 1; | |
691 | return 1; | |
692 | } | |
693 | ||
694 | __setup("keepinitrd", keepinitrd_setup); | |
695 | #endif |