Commit | Line | Data |
---|---|---|
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> | |
9eb8f674 | 18 | #include <linux/of_fdt.h> |
3835f6cb | 19 | #include <linux/highmem.h> |
5a0e3ad6 | 20 | #include <linux/gfp.h> |
2778f620 | 21 | #include <linux/memblock.h> |
7dc50ec7 | 22 | #include <linux/sort.h> |
1da177e4 LT |
23 | |
24 | #include <asm/mach-types.h> | |
37efe642 | 25 | #include <asm/sections.h> |
1da177e4 | 26 | #include <asm/setup.h> |
74d02fb9 | 27 | #include <asm/sizes.h> |
1da177e4 | 28 | #include <asm/tlb.h> |
db9ef1af | 29 | #include <asm/fixmap.h> |
1da177e4 LT |
30 | |
31 | #include <asm/mach/arch.h> | |
32 | #include <asm/mach/map.h> | |
33 | ||
1b2e2b73 RK |
34 | #include "mm.h" |
35 | ||
012d1f4a RK |
36 | static unsigned long phys_initrd_start __initdata = 0; |
37 | static unsigned long phys_initrd_size __initdata = 0; | |
38 | ||
2b0d8c25 | 39 | static int __init early_initrd(char *p) |
012d1f4a RK |
40 | { |
41 | unsigned long start, size; | |
2b0d8c25 | 42 | char *endp; |
012d1f4a | 43 | |
2b0d8c25 JK |
44 | start = memparse(p, &endp); |
45 | if (*endp == ',') { | |
46 | size = memparse(endp + 1, NULL); | |
012d1f4a RK |
47 | |
48 | phys_initrd_start = start; | |
49 | phys_initrd_size = size; | |
50 | } | |
2b0d8c25 | 51 | return 0; |
012d1f4a | 52 | } |
2b0d8c25 | 53 | early_param("initrd", early_initrd); |
012d1f4a RK |
54 | |
55 | static int __init parse_tag_initrd(const struct tag *tag) | |
56 | { | |
57 | printk(KERN_WARNING "ATAG_INITRD is deprecated; " | |
58 | "please update your bootloader.\n"); | |
59 | phys_initrd_start = __virt_to_phys(tag->u.initrd.start); | |
60 | phys_initrd_size = tag->u.initrd.size; | |
61 | return 0; | |
62 | } | |
63 | ||
64 | __tagtable(ATAG_INITRD, parse_tag_initrd); | |
65 | ||
66 | static int __init parse_tag_initrd2(const struct tag *tag) | |
67 | { | |
68 | phys_initrd_start = tag->u.initrd.start; | |
69 | phys_initrd_size = tag->u.initrd.size; | |
70 | return 0; | |
71 | } | |
72 | ||
73 | __tagtable(ATAG_INITRD2, parse_tag_initrd2); | |
1da177e4 | 74 | |
9eb8f674 GL |
75 | #ifdef CONFIG_OF_FLATTREE |
76 | void __init early_init_dt_setup_initrd_arch(unsigned long start, unsigned long end) | |
77 | { | |
78 | phys_initrd_start = start; | |
79 | phys_initrd_size = end - start; | |
80 | } | |
81 | #endif /* CONFIG_OF_FLATTREE */ | |
82 | ||
1da177e4 | 83 | /* |
4b5f32ce NP |
84 | * This keeps memory configuration data used by a couple memory |
85 | * initialization functions, as well as show_mem() for the skipping | |
86 | * of holes in the memory map. It is populated by arm_add_memory(). | |
1da177e4 | 87 | */ |
4b5f32ce | 88 | struct meminfo meminfo; |
5e709827 | 89 | |
b2b755b5 | 90 | void show_mem(unsigned int filter) |
1da177e4 LT |
91 | { |
92 | int free = 0, total = 0, reserved = 0; | |
be370302 | 93 | int shared = 0, cached = 0, slab = 0, i; |
5e709827 | 94 | struct meminfo * mi = &meminfo; |
1da177e4 LT |
95 | |
96 | printk("Mem-info:\n"); | |
97 | show_free_areas(); | |
be370302 RK |
98 | |
99 | for_each_bank (i, mi) { | |
100 | struct membank *bank = &mi->bank[i]; | |
101 | unsigned int pfn1, pfn2; | |
102 | struct page *page, *end; | |
103 | ||
104 | pfn1 = bank_pfn_start(bank); | |
105 | pfn2 = bank_pfn_end(bank); | |
106 | ||
107 | page = pfn_to_page(pfn1); | |
108 | end = pfn_to_page(pfn2 - 1) + 1; | |
109 | ||
110 | do { | |
111 | total++; | |
112 | if (PageReserved(page)) | |
113 | reserved++; | |
114 | else if (PageSwapCache(page)) | |
115 | cached++; | |
116 | else if (PageSlab(page)) | |
117 | slab++; | |
118 | else if (!page_count(page)) | |
119 | free++; | |
120 | else | |
121 | shared += page_count(page) - 1; | |
122 | page++; | |
123 | } while (page < end); | |
1da177e4 LT |
124 | } |
125 | ||
126 | printk("%d pages of RAM\n", total); | |
127 | printk("%d free pages\n", free); | |
128 | printk("%d reserved pages\n", reserved); | |
129 | printk("%d slab pages\n", slab); | |
130 | printk("%d pages shared\n", shared); | |
131 | printk("%d pages swap cached\n", cached); | |
132 | } | |
133 | ||
f25b4b4c RK |
134 | static void __init find_limits(unsigned long *min, unsigned long *max_low, |
135 | unsigned long *max_high) | |
dde5828f | 136 | { |
f25b4b4c | 137 | struct meminfo *mi = &meminfo; |
dde5828f RK |
138 | int i; |
139 | ||
140 | *min = -1UL; | |
141 | *max_low = *max_high = 0; | |
142 | ||
be370302 | 143 | for_each_bank (i, mi) { |
dde5828f RK |
144 | struct membank *bank = &mi->bank[i]; |
145 | unsigned long start, end; | |
146 | ||
147 | start = bank_pfn_start(bank); | |
148 | end = bank_pfn_end(bank); | |
149 | ||
150 | if (*min > start) | |
151 | *min = start; | |
152 | if (*max_high < end) | |
153 | *max_high = end; | |
154 | if (bank->highmem) | |
155 | continue; | |
156 | if (*max_low < end) | |
157 | *max_low = end; | |
158 | } | |
159 | } | |
160 | ||
a801d276 RK |
161 | static void __init arm_bootmem_init(unsigned long start_pfn, |
162 | unsigned long end_pfn) | |
1da177e4 | 163 | { |
719c1514 | 164 | struct memblock_region *reg; |
90072059 | 165 | unsigned int boot_pages; |
2778f620 | 166 | phys_addr_t bitmap; |
90072059 | 167 | pg_data_t *pgdat; |
1da177e4 | 168 | |
90072059 | 169 | /* |
2778f620 RK |
170 | * Allocate the bootmem bitmap page. This must be in a region |
171 | * of memory which has already been mapped. | |
90072059 RK |
172 | */ |
173 | boot_pages = bootmem_bootmap_pages(end_pfn - start_pfn); | |
2778f620 RK |
174 | bitmap = memblock_alloc_base(boot_pages << PAGE_SHIFT, L1_CACHE_BYTES, |
175 | __pfn_to_phys(end_pfn)); | |
1da177e4 | 176 | |
90072059 | 177 | /* |
be370302 | 178 | * Initialise the bootmem allocator, handing the |
90072059 RK |
179 | * memory banks over to bootmem. |
180 | */ | |
be370302 RK |
181 | node_set_online(0); |
182 | pgdat = NODE_DATA(0); | |
2778f620 | 183 | init_bootmem_node(pgdat, __phys_to_pfn(bitmap), start_pfn, end_pfn); |
1da177e4 | 184 | |
a801d276 RK |
185 | /* Free the lowmem regions from memblock into bootmem. */ |
186 | for_each_memblock(memory, reg) { | |
187 | unsigned long start = memblock_region_memory_base_pfn(reg); | |
188 | unsigned long end = memblock_region_memory_end_pfn(reg); | |
189 | ||
190 | if (end >= end_pfn) | |
191 | end = end_pfn; | |
192 | if (start >= end) | |
193 | break; | |
194 | ||
195 | free_bootmem(__pfn_to_phys(start), (end - start) << PAGE_SHIFT); | |
d2a38ef9 | 196 | } |
90072059 | 197 | |
a801d276 | 198 | /* Reserve the lowmem memblock reserved regions in bootmem. */ |
719c1514 | 199 | for_each_memblock(reserved, reg) { |
a801d276 RK |
200 | unsigned long start = memblock_region_reserved_base_pfn(reg); |
201 | unsigned long end = memblock_region_reserved_end_pfn(reg); | |
202 | ||
203 | if (end >= end_pfn) | |
204 | end = end_pfn; | |
205 | if (start >= end) | |
206 | break; | |
207 | ||
208 | reserve_bootmem(__pfn_to_phys(start), | |
209 | (end - start) << PAGE_SHIFT, BOOTMEM_DEFAULT); | |
1da177e4 | 210 | } |
b7a69ac3 RK |
211 | } |
212 | ||
a2c54d2a RK |
213 | static void __init arm_bootmem_free(unsigned long min, unsigned long max_low, |
214 | unsigned long max_high) | |
b7a69ac3 RK |
215 | { |
216 | unsigned long zone_size[MAX_NR_ZONES], zhole_size[MAX_NR_ZONES]; | |
a2c54d2a | 217 | struct memblock_region *reg; |
b7a69ac3 | 218 | |
90072059 | 219 | /* |
be370302 | 220 | * initialise the zones. |
90072059 RK |
221 | */ |
222 | memset(zone_size, 0, sizeof(zone_size)); | |
90072059 RK |
223 | |
224 | /* | |
be370302 RK |
225 | * The memory size has already been determined. If we need |
226 | * to do anything fancy with the allocation of this memory | |
227 | * to the zones, now is the time to do it. | |
90072059 | 228 | */ |
dde5828f RK |
229 | zone_size[0] = max_low - min; |
230 | #ifdef CONFIG_HIGHMEM | |
231 | zone_size[ZONE_HIGHMEM] = max_high - max_low; | |
232 | #endif | |
90072059 RK |
233 | |
234 | /* | |
be370302 RK |
235 | * Calculate the size of the holes. |
236 | * holes = node_size - sum(bank_sizes) | |
90072059 | 237 | */ |
dde5828f | 238 | memcpy(zhole_size, zone_size, sizeof(zhole_size)); |
a2c54d2a RK |
239 | for_each_memblock(memory, reg) { |
240 | unsigned long start = memblock_region_memory_base_pfn(reg); | |
241 | unsigned long end = memblock_region_memory_end_pfn(reg); | |
242 | ||
243 | if (start < max_low) { | |
244 | unsigned long low_end = min(end, max_low); | |
245 | zhole_size[0] -= low_end - start; | |
246 | } | |
dde5828f | 247 | #ifdef CONFIG_HIGHMEM |
a2c54d2a RK |
248 | if (end > max_low) { |
249 | unsigned long high_start = max(start, max_low); | |
250 | zhole_size[ZONE_HIGHMEM] -= end - high_start; | |
251 | } | |
dde5828f | 252 | #endif |
dde5828f | 253 | } |
90072059 RK |
254 | |
255 | /* | |
256 | * Adjust the sizes according to any special requirements for | |
257 | * this machine type. | |
258 | */ | |
b65b4781 | 259 | arch_adjust_zones(zone_size, zhole_size); |
90072059 | 260 | |
be370302 | 261 | free_area_init_node(0, zone_size, min, zhole_size); |
1da177e4 LT |
262 | } |
263 | ||
b7cfda9f RK |
264 | #ifndef CONFIG_SPARSEMEM |
265 | int pfn_valid(unsigned long pfn) | |
266 | { | |
5e6f6aa1 | 267 | return memblock_is_memory(pfn << PAGE_SHIFT); |
b7cfda9f RK |
268 | } |
269 | EXPORT_SYMBOL(pfn_valid); | |
657e12fd | 270 | |
eda2e5dc | 271 | static void arm_memory_present(void) |
657e12fd RK |
272 | { |
273 | } | |
274 | #else | |
eda2e5dc | 275 | static void arm_memory_present(void) |
657e12fd | 276 | { |
719c1514 | 277 | struct memblock_region *reg; |
719c1514 | 278 | |
7c996361 | 279 | for_each_memblock(memory, reg) |
c7fc2de0 YL |
280 | memory_present(0, memblock_region_memory_base_pfn(reg), |
281 | memblock_region_memory_end_pfn(reg)); | |
657e12fd | 282 | } |
b7cfda9f RK |
283 | #endif |
284 | ||
7dc50ec7 RK |
285 | static int __init meminfo_cmp(const void *_a, const void *_b) |
286 | { | |
287 | const struct membank *a = _a, *b = _b; | |
288 | long cmp = bank_pfn_start(a) - bank_pfn_start(b); | |
289 | return cmp < 0 ? -1 : cmp > 0 ? 1 : 0; | |
290 | } | |
291 | ||
8d717a52 | 292 | void __init arm_memblock_init(struct meminfo *mi, struct machine_desc *mdesc) |
2778f620 RK |
293 | { |
294 | int i; | |
295 | ||
7dc50ec7 RK |
296 | sort(&meminfo.bank, meminfo.nr_banks, sizeof(meminfo.bank[0]), meminfo_cmp, NULL); |
297 | ||
2778f620 RK |
298 | memblock_init(); |
299 | for (i = 0; i < mi->nr_banks; i++) | |
300 | memblock_add(mi->bank[i].start, mi->bank[i].size); | |
301 | ||
302 | /* Register the kernel text, kernel data and initrd with memblock. */ | |
303 | #ifdef CONFIG_XIP_KERNEL | |
842eab40 | 304 | memblock_reserve(__pa(_sdata), _end - _sdata); |
2778f620 RK |
305 | #else |
306 | memblock_reserve(__pa(_stext), _end - _stext); | |
307 | #endif | |
308 | #ifdef CONFIG_BLK_DEV_INITRD | |
b0a2679d RK |
309 | if (phys_initrd_size && |
310 | memblock_is_region_reserved(phys_initrd_start, phys_initrd_size)) { | |
311 | pr_err("INITRD: 0x%08lx+0x%08lx overlaps in-use memory region - disabling initrd\n", | |
312 | phys_initrd_start, phys_initrd_size); | |
313 | phys_initrd_start = phys_initrd_size = 0; | |
314 | } | |
2778f620 RK |
315 | if (phys_initrd_size) { |
316 | memblock_reserve(phys_initrd_start, phys_initrd_size); | |
317 | ||
318 | /* Now convert initrd to virtual addresses */ | |
319 | initrd_start = __phys_to_virt(phys_initrd_start); | |
320 | initrd_end = initrd_start + phys_initrd_size; | |
321 | } | |
322 | #endif | |
323 | ||
324 | arm_mm_memblock_reserve(); | |
325 | ||
8d717a52 RK |
326 | /* reserve any platform specific memblock areas */ |
327 | if (mdesc->reserve) | |
328 | mdesc->reserve(); | |
329 | ||
2778f620 RK |
330 | memblock_analyze(); |
331 | memblock_dump_all(); | |
332 | } | |
333 | ||
8d717a52 | 334 | void __init bootmem_init(void) |
1da177e4 | 335 | { |
dde5828f | 336 | unsigned long min, max_low, max_high; |
1da177e4 | 337 | |
dde5828f RK |
338 | max_low = max_high = 0; |
339 | ||
f25b4b4c | 340 | find_limits(&min, &max_low, &max_high); |
dde5828f | 341 | |
a801d276 | 342 | arm_bootmem_init(min, max_low); |
dde5828f | 343 | |
be370302 RK |
344 | /* |
345 | * Sparsemem tries to allocate bootmem in memory_present(), | |
346 | * so must be done after the fixed reservations | |
347 | */ | |
eda2e5dc | 348 | arm_memory_present(); |
1da177e4 | 349 | |
b7a69ac3 RK |
350 | /* |
351 | * sparse_init() needs the bootmem allocator up and running. | |
352 | */ | |
353 | sparse_init(); | |
354 | ||
355 | /* | |
be370302 | 356 | * Now free the memory - free_area_init_node needs |
b7a69ac3 RK |
357 | * the sparse mem_map arrays initialized by sparse_init() |
358 | * for memmap_init_zone(), otherwise all PFNs are invalid. | |
359 | */ | |
a2c54d2a | 360 | arm_bootmem_free(min, max_low, max_high); |
b7a69ac3 | 361 | |
cae6292b | 362 | high_memory = __va(((phys_addr_t)max_low << PAGE_SHIFT) - 1) + 1; |
1da177e4 | 363 | |
90072059 RK |
364 | /* |
365 | * This doesn't seem to be used by the Linux memory manager any | |
366 | * more, but is used by ll_rw_block. If we can get rid of it, we | |
367 | * also get rid of some of the stuff above as well. | |
368 | * | |
369 | * Note: max_low_pfn and max_pfn reflect the number of _pages_ in | |
370 | * the system, not the maximum PFN. | |
371 | */ | |
dde5828f RK |
372 | max_low_pfn = max_low - PHYS_PFN_OFFSET; |
373 | max_pfn = max_high - PHYS_PFN_OFFSET; | |
90072059 | 374 | } |
1da177e4 | 375 | |
6db015e4 | 376 | static inline int free_area(unsigned long pfn, unsigned long end, char *s) |
1da177e4 | 377 | { |
6db015e4 | 378 | unsigned int pages = 0, size = (end - pfn) << (PAGE_SHIFT - 10); |
1da177e4 | 379 | |
6db015e4 NP |
380 | for (; pfn < end; pfn++) { |
381 | struct page *page = pfn_to_page(pfn); | |
1da177e4 | 382 | ClearPageReserved(page); |
7835e98b | 383 | init_page_count(page); |
6db015e4 NP |
384 | __free_page(page); |
385 | pages++; | |
1da177e4 LT |
386 | } |
387 | ||
388 | if (size && s) | |
389 | printk(KERN_INFO "Freeing %s memory: %dK\n", s, size); | |
6db015e4 NP |
390 | |
391 | return pages; | |
1da177e4 LT |
392 | } |
393 | ||
a013053d | 394 | static inline void |
be370302 | 395 | free_memmap(unsigned long start_pfn, unsigned long end_pfn) |
a013053d RK |
396 | { |
397 | struct page *start_pg, *end_pg; | |
398 | unsigned long pg, pgend; | |
399 | ||
400 | /* | |
401 | * Convert start_pfn/end_pfn to a struct page pointer. | |
402 | */ | |
3257f43d | 403 | start_pg = pfn_to_page(start_pfn - 1) + 1; |
a013053d RK |
404 | end_pg = pfn_to_page(end_pfn); |
405 | ||
406 | /* | |
407 | * Convert to physical addresses, and | |
408 | * round start upwards and end downwards. | |
409 | */ | |
cae6292b WD |
410 | pg = (unsigned long)PAGE_ALIGN(__pa(start_pg)); |
411 | pgend = (unsigned long)__pa(end_pg) & PAGE_MASK; | |
a013053d RK |
412 | |
413 | /* | |
414 | * If there are free pages between these, | |
415 | * free the section of the memmap array. | |
416 | */ | |
417 | if (pg < pgend) | |
be370302 | 418 | free_bootmem(pg, pgend - pg); |
a013053d RK |
419 | } |
420 | ||
421 | /* | |
422 | * The mem_map array can get very big. Free the unused area of the memory map. | |
423 | */ | |
be370302 | 424 | static void __init free_unused_memmap(struct meminfo *mi) |
a013053d RK |
425 | { |
426 | unsigned long bank_start, prev_bank_end = 0; | |
427 | unsigned int i; | |
428 | ||
429 | /* | |
3260e529 MB |
430 | * This relies on each bank being in address order. |
431 | * The banks are sorted previously in bootmem_init(). | |
a013053d | 432 | */ |
be370302 | 433 | for_each_bank(i, mi) { |
d2a38ef9 RK |
434 | struct membank *bank = &mi->bank[i]; |
435 | ||
436 | bank_start = bank_pfn_start(bank); | |
a013053d RK |
437 | |
438 | /* | |
439 | * If we had a previous bank, and there is a space | |
440 | * between the current bank and the previous, free it. | |
441 | */ | |
3260e529 | 442 | if (prev_bank_end && prev_bank_end < bank_start) |
be370302 | 443 | free_memmap(prev_bank_end, bank_start); |
a013053d | 444 | |
3260e529 MB |
445 | /* |
446 | * Align up here since the VM subsystem insists that the | |
447 | * memmap entries are valid from the bank end aligned to | |
448 | * MAX_ORDER_NR_PAGES. | |
449 | */ | |
450 | prev_bank_end = ALIGN(bank_pfn_end(bank), MAX_ORDER_NR_PAGES); | |
a013053d RK |
451 | } |
452 | } | |
453 | ||
d0e775af RK |
454 | static void __init free_highpages(void) |
455 | { | |
456 | #ifdef CONFIG_HIGHMEM | |
df4f14c7 RK |
457 | unsigned long max_low = max_low_pfn + PHYS_PFN_OFFSET; |
458 | struct memblock_region *mem, *res; | |
d0e775af RK |
459 | |
460 | /* set highmem page free */ | |
df4f14c7 RK |
461 | for_each_memblock(memory, mem) { |
462 | unsigned long start = memblock_region_memory_base_pfn(mem); | |
463 | unsigned long end = memblock_region_memory_end_pfn(mem); | |
464 | ||
465 | /* Ignore complete lowmem entries */ | |
466 | if (end <= max_low) | |
467 | continue; | |
468 | ||
469 | /* Truncate partial highmem entries */ | |
470 | if (start < max_low) | |
471 | start = max_low; | |
472 | ||
473 | /* Find and exclude any reserved regions */ | |
474 | for_each_memblock(reserved, res) { | |
475 | unsigned long res_start, res_end; | |
476 | ||
477 | res_start = memblock_region_reserved_base_pfn(res); | |
478 | res_end = memblock_region_reserved_end_pfn(res); | |
479 | ||
480 | if (res_end < start) | |
481 | continue; | |
482 | if (res_start < start) | |
483 | res_start = start; | |
484 | if (res_start > end) | |
485 | res_start = end; | |
486 | if (res_end > end) | |
487 | res_end = end; | |
488 | if (res_start != start) | |
489 | totalhigh_pages += free_area(start, res_start, | |
490 | NULL); | |
491 | start = res_end; | |
492 | if (start == end) | |
493 | break; | |
494 | } | |
495 | ||
496 | /* And now free anything which remains */ | |
497 | if (start < end) | |
d0e775af RK |
498 | totalhigh_pages += free_area(start, end, NULL); |
499 | } | |
500 | totalram_pages += totalhigh_pages; | |
501 | #endif | |
502 | } | |
503 | ||
1da177e4 LT |
504 | /* |
505 | * mem_init() marks the free areas in the mem_map and tells us how much | |
506 | * memory is free. This is done after various parts of the system have | |
507 | * claimed their memory after the kernel image. | |
508 | */ | |
509 | void __init mem_init(void) | |
510 | { | |
db9ef1af | 511 | unsigned long reserved_pages, free_pages; |
47ea3c15 | 512 | struct memblock_region *reg; |
be370302 | 513 | int i; |
1dbd30e9 LW |
514 | #ifdef CONFIG_HAVE_TCM |
515 | /* These pointers are filled in on TCM detection */ | |
516 | extern u32 dtcm_end; | |
517 | extern u32 itcm_end; | |
518 | #endif | |
1da177e4 | 519 | |
3835f6cb | 520 | max_mapnr = pfn_to_page(max_pfn + PHYS_PFN_OFFSET) - mem_map; |
1da177e4 | 521 | |
1da177e4 | 522 | /* this will put all unused low memory onto the freelists */ |
be370302 | 523 | free_unused_memmap(&meminfo); |
a013053d | 524 | |
be370302 | 525 | totalram_pages += free_all_bootmem(); |
1da177e4 LT |
526 | |
527 | #ifdef CONFIG_SA1111 | |
528 | /* now that our DMA memory is actually so designated, we can free it */ | |
6db015e4 NP |
529 | totalram_pages += free_area(PHYS_PFN_OFFSET, |
530 | __phys_to_pfn(__pa(swapper_pg_dir)), NULL); | |
1da177e4 LT |
531 | #endif |
532 | ||
d0e775af | 533 | free_highpages(); |
3835f6cb | 534 | |
db9ef1af FB |
535 | reserved_pages = free_pages = 0; |
536 | ||
be370302 RK |
537 | for_each_bank(i, &meminfo) { |
538 | struct membank *bank = &meminfo.bank[i]; | |
539 | unsigned int pfn1, pfn2; | |
540 | struct page *page, *end; | |
541 | ||
542 | pfn1 = bank_pfn_start(bank); | |
543 | pfn2 = bank_pfn_end(bank); | |
544 | ||
545 | page = pfn_to_page(pfn1); | |
546 | end = pfn_to_page(pfn2 - 1) + 1; | |
547 | ||
548 | do { | |
549 | if (PageReserved(page)) | |
550 | reserved_pages++; | |
551 | else if (!page_count(page)) | |
552 | free_pages++; | |
553 | page++; | |
554 | } while (page < end); | |
db9ef1af FB |
555 | } |
556 | ||
1da177e4 LT |
557 | /* |
558 | * Since our memory may not be contiguous, calculate the | |
559 | * real number of pages we have in this system | |
560 | */ | |
561 | printk(KERN_INFO "Memory:"); | |
1da177e4 | 562 | num_physpages = 0; |
47ea3c15 RK |
563 | for_each_memblock(memory, reg) { |
564 | unsigned long pages = memblock_region_memory_end_pfn(reg) - | |
565 | memblock_region_memory_base_pfn(reg); | |
566 | num_physpages += pages; | |
567 | printk(" %ldMB", pages >> (20 - PAGE_SHIFT)); | |
1da177e4 | 568 | } |
1da177e4 | 569 | printk(" = %luMB total\n", num_physpages >> (20 - PAGE_SHIFT)); |
6db015e4 | 570 | |
db9ef1af FB |
571 | printk(KERN_NOTICE "Memory: %luk/%luk available, %luk reserved, %luK highmem\n", |
572 | nr_free_pages() << (PAGE_SHIFT-10), | |
573 | free_pages << (PAGE_SHIFT-10), | |
574 | reserved_pages << (PAGE_SHIFT-10), | |
4b529401 | 575 | totalhigh_pages << (PAGE_SHIFT-10)); |
1da177e4 | 576 | |
db9ef1af FB |
577 | #define MLK(b, t) b, t, ((t) - (b)) >> 10 |
578 | #define MLM(b, t) b, t, ((t) - (b)) >> 20 | |
579 | #define MLK_ROUNDUP(b, t) b, t, DIV_ROUND_UP(((t) - (b)), SZ_1K) | |
580 | ||
581 | printk(KERN_NOTICE "Virtual kernel memory layout:\n" | |
582 | " vector : 0x%08lx - 0x%08lx (%4ld kB)\n" | |
07d2a5c7 | 583 | #ifdef CONFIG_HAVE_TCM |
07d2a5c7 | 584 | " DTCM : 0x%08lx - 0x%08lx (%4ld kB)\n" |
07d2a5c7 | 585 | " ITCM : 0x%08lx - 0x%08lx (%4ld kB)\n" |
07d2a5c7 | 586 | #endif |
db9ef1af | 587 | " fixmap : 0x%08lx - 0x%08lx (%4ld kB)\n" |
a7bd08c8 FB |
588 | #ifdef CONFIG_MMU |
589 | " DMA : 0x%08lx - 0x%08lx (%4ld MB)\n" | |
590 | #endif | |
db9ef1af FB |
591 | " vmalloc : 0x%08lx - 0x%08lx (%4ld MB)\n" |
592 | " lowmem : 0x%08lx - 0x%08lx (%4ld MB)\n" | |
593 | #ifdef CONFIG_HIGHMEM | |
594 | " pkmap : 0x%08lx - 0x%08lx (%4ld MB)\n" | |
595 | #endif | |
596 | " modules : 0x%08lx - 0x%08lx (%4ld MB)\n" | |
597 | " .init : 0x%p" " - 0x%p" " (%4d kB)\n" | |
598 | " .text : 0x%p" " - 0x%p" " (%4d kB)\n" | |
599 | " .data : 0x%p" " - 0x%p" " (%4d kB)\n", | |
600 | ||
601 | MLK(UL(CONFIG_VECTORS_BASE), UL(CONFIG_VECTORS_BASE) + | |
602 | (PAGE_SIZE)), | |
07d2a5c7 | 603 | #ifdef CONFIG_HAVE_TCM |
1dbd30e9 LW |
604 | MLK(DTCM_OFFSET, (unsigned long) dtcm_end), |
605 | MLK(ITCM_OFFSET, (unsigned long) itcm_end), | |
07d2a5c7 | 606 | #endif |
db9ef1af | 607 | MLK(FIXADDR_START, FIXADDR_TOP), |
a7bd08c8 FB |
608 | #ifdef CONFIG_MMU |
609 | MLM(CONSISTENT_BASE, CONSISTENT_END), | |
610 | #endif | |
c931b4f6 | 611 | MLM(VMALLOC_START, VMALLOC_END), |
db9ef1af FB |
612 | MLM(PAGE_OFFSET, (unsigned long)high_memory), |
613 | #ifdef CONFIG_HIGHMEM | |
614 | MLM(PKMAP_BASE, (PKMAP_BASE) + (LAST_PKMAP) * | |
615 | (PAGE_SIZE)), | |
616 | #endif | |
617 | MLM(MODULES_VADDR, MODULES_END), | |
618 | ||
619 | MLK_ROUNDUP(__init_begin, __init_end), | |
620 | MLK_ROUNDUP(_text, _etext), | |
842eab40 | 621 | MLK_ROUNDUP(_sdata, _edata)); |
db9ef1af FB |
622 | |
623 | #undef MLK | |
624 | #undef MLM | |
625 | #undef MLK_ROUNDUP | |
626 | ||
a1839272 FB |
627 | /* |
628 | * Check boundaries twice: Some fundamental inconsistencies can | |
629 | * be detected at build time already. | |
630 | */ | |
631 | #ifdef CONFIG_MMU | |
632 | BUILD_BUG_ON(VMALLOC_END > CONSISTENT_BASE); | |
633 | BUG_ON(VMALLOC_END > CONSISTENT_BASE); | |
634 | ||
635 | BUILD_BUG_ON(TASK_SIZE > MODULES_VADDR); | |
636 | BUG_ON(TASK_SIZE > MODULES_VADDR); | |
637 | #endif | |
638 | ||
639 | #ifdef CONFIG_HIGHMEM | |
640 | BUILD_BUG_ON(PKMAP_BASE + LAST_PKMAP * PAGE_SIZE > PAGE_OFFSET); | |
641 | BUG_ON(PKMAP_BASE + LAST_PKMAP * PAGE_SIZE > PAGE_OFFSET); | |
642 | #endif | |
643 | ||
1da177e4 LT |
644 | if (PAGE_SIZE >= 16384 && num_physpages <= 128) { |
645 | extern int sysctl_overcommit_memory; | |
646 | /* | |
647 | * On a machine this small we won't get | |
648 | * anywhere without overcommit, so turn | |
649 | * it on by default. | |
650 | */ | |
651 | sysctl_overcommit_memory = OVERCOMMIT_ALWAYS; | |
652 | } | |
653 | } | |
654 | ||
655 | void free_initmem(void) | |
656 | { | |
bc581770 | 657 | #ifdef CONFIG_HAVE_TCM |
ea208f64 | 658 | extern char __tcm_start, __tcm_end; |
bc581770 | 659 | |
ea208f64 LW |
660 | totalram_pages += free_area(__phys_to_pfn(__pa(&__tcm_start)), |
661 | __phys_to_pfn(__pa(&__tcm_end)), | |
bc581770 LW |
662 | "TCM link"); |
663 | #endif | |
664 | ||
6db015e4 | 665 | if (!machine_is_integrator() && !machine_is_cintegrator()) |
37efe642 RK |
666 | totalram_pages += free_area(__phys_to_pfn(__pa(__init_begin)), |
667 | __phys_to_pfn(__pa(__init_end)), | |
6db015e4 | 668 | "init"); |
1da177e4 LT |
669 | } |
670 | ||
671 | #ifdef CONFIG_BLK_DEV_INITRD | |
672 | ||
673 | static int keep_initrd; | |
674 | ||
675 | void free_initrd_mem(unsigned long start, unsigned long end) | |
676 | { | |
677 | if (!keep_initrd) | |
6db015e4 NP |
678 | totalram_pages += free_area(__phys_to_pfn(__pa(start)), |
679 | __phys_to_pfn(__pa(end)), | |
680 | "initrd"); | |
1da177e4 LT |
681 | } |
682 | ||
683 | static int __init keepinitrd_setup(char *__unused) | |
684 | { | |
685 | keep_initrd = 1; | |
686 | return 1; | |
687 | } | |
688 | ||
689 | __setup("keepinitrd", keepinitrd_setup); | |
690 | #endif |