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> |
1da177e4 LT |
20 | |
21 | #include <asm/mach-types.h> | |
37efe642 | 22 | #include <asm/sections.h> |
1da177e4 | 23 | #include <asm/setup.h> |
74d02fb9 | 24 | #include <asm/sizes.h> |
1da177e4 | 25 | #include <asm/tlb.h> |
db9ef1af | 26 | #include <asm/fixmap.h> |
1da177e4 LT |
27 | |
28 | #include <asm/mach/arch.h> | |
29 | #include <asm/mach/map.h> | |
30 | ||
1b2e2b73 RK |
31 | #include "mm.h" |
32 | ||
012d1f4a RK |
33 | static unsigned long phys_initrd_start __initdata = 0; |
34 | static unsigned long phys_initrd_size __initdata = 0; | |
35 | ||
2b0d8c25 | 36 | static int __init early_initrd(char *p) |
012d1f4a RK |
37 | { |
38 | unsigned long start, size; | |
2b0d8c25 | 39 | char *endp; |
012d1f4a | 40 | |
2b0d8c25 JK |
41 | start = memparse(p, &endp); |
42 | if (*endp == ',') { | |
43 | size = memparse(endp + 1, NULL); | |
012d1f4a RK |
44 | |
45 | phys_initrd_start = start; | |
46 | phys_initrd_size = size; | |
47 | } | |
2b0d8c25 | 48 | return 0; |
012d1f4a | 49 | } |
2b0d8c25 | 50 | early_param("initrd", early_initrd); |
012d1f4a RK |
51 | |
52 | static int __init parse_tag_initrd(const struct tag *tag) | |
53 | { | |
54 | printk(KERN_WARNING "ATAG_INITRD is deprecated; " | |
55 | "please update your bootloader.\n"); | |
56 | phys_initrd_start = __virt_to_phys(tag->u.initrd.start); | |
57 | phys_initrd_size = tag->u.initrd.size; | |
58 | return 0; | |
59 | } | |
60 | ||
61 | __tagtable(ATAG_INITRD, parse_tag_initrd); | |
62 | ||
63 | static int __init parse_tag_initrd2(const struct tag *tag) | |
64 | { | |
65 | phys_initrd_start = tag->u.initrd.start; | |
66 | phys_initrd_size = tag->u.initrd.size; | |
67 | return 0; | |
68 | } | |
69 | ||
70 | __tagtable(ATAG_INITRD2, parse_tag_initrd2); | |
1da177e4 LT |
71 | |
72 | /* | |
4b5f32ce NP |
73 | * This keeps memory configuration data used by a couple memory |
74 | * initialization functions, as well as show_mem() for the skipping | |
75 | * of holes in the memory map. It is populated by arm_add_memory(). | |
1da177e4 | 76 | */ |
4b5f32ce | 77 | struct meminfo meminfo; |
5e709827 | 78 | |
1da177e4 LT |
79 | void show_mem(void) |
80 | { | |
81 | int free = 0, total = 0, reserved = 0; | |
5e709827 RL |
82 | int shared = 0, cached = 0, slab = 0, node, i; |
83 | struct meminfo * mi = &meminfo; | |
1da177e4 LT |
84 | |
85 | printk("Mem-info:\n"); | |
86 | show_free_areas(); | |
1da177e4 | 87 | for_each_online_node(node) { |
5e709827 | 88 | for_each_nodebank (i,mi,node) { |
d2a38ef9 | 89 | struct membank *bank = &mi->bank[i]; |
5e709827 RL |
90 | unsigned int pfn1, pfn2; |
91 | struct page *page, *end; | |
92 | ||
d2a38ef9 RK |
93 | pfn1 = bank_pfn_start(bank); |
94 | pfn2 = bank_pfn_end(bank); | |
5e709827 | 95 | |
ea056df7 CM |
96 | page = pfn_to_page(pfn1); |
97 | end = pfn_to_page(pfn2 - 1) + 1; | |
5e709827 RL |
98 | |
99 | do { | |
100 | total++; | |
101 | if (PageReserved(page)) | |
102 | reserved++; | |
103 | else if (PageSwapCache(page)) | |
104 | cached++; | |
105 | else if (PageSlab(page)) | |
106 | slab++; | |
107 | else if (!page_count(page)) | |
108 | free++; | |
109 | else | |
110 | shared += page_count(page) - 1; | |
111 | page++; | |
112 | } while (page < end); | |
113 | } | |
1da177e4 LT |
114 | } |
115 | ||
116 | printk("%d pages of RAM\n", total); | |
117 | printk("%d free pages\n", free); | |
118 | printk("%d reserved pages\n", reserved); | |
119 | printk("%d slab pages\n", slab); | |
120 | printk("%d pages shared\n", shared); | |
121 | printk("%d pages swap cached\n", cached); | |
122 | } | |
123 | ||
dde5828f RK |
124 | static void __init find_node_limits(int node, struct meminfo *mi, |
125 | unsigned long *min, unsigned long *max_low, unsigned long *max_high) | |
126 | { | |
127 | int i; | |
128 | ||
129 | *min = -1UL; | |
130 | *max_low = *max_high = 0; | |
131 | ||
132 | for_each_nodebank(i, mi, node) { | |
133 | struct membank *bank = &mi->bank[i]; | |
134 | unsigned long start, end; | |
135 | ||
136 | start = bank_pfn_start(bank); | |
137 | end = bank_pfn_end(bank); | |
138 | ||
139 | if (*min > start) | |
140 | *min = start; | |
141 | if (*max_high < end) | |
142 | *max_high = end; | |
143 | if (bank->highmem) | |
144 | continue; | |
145 | if (*max_low < end) | |
146 | *max_low = end; | |
147 | } | |
148 | } | |
149 | ||
1da177e4 LT |
150 | /* |
151 | * FIXME: We really want to avoid allocating the bootmap bitmap | |
152 | * over the top of the initrd. Hopefully, this is located towards | |
153 | * the start of a bank, so if we allocate the bootmap bitmap at | |
154 | * the end, we won't clash. | |
155 | */ | |
156 | static unsigned int __init | |
157 | find_bootmap_pfn(int node, struct meminfo *mi, unsigned int bootmap_pages) | |
158 | { | |
d2a38ef9 | 159 | unsigned int start_pfn, i, bootmap_pfn; |
1da177e4 | 160 | |
37efe642 | 161 | start_pfn = PAGE_ALIGN(__pa(_end)) >> PAGE_SHIFT; |
1da177e4 LT |
162 | bootmap_pfn = 0; |
163 | ||
d2a38ef9 RK |
164 | for_each_nodebank(i, mi, node) { |
165 | struct membank *bank = &mi->bank[i]; | |
1da177e4 LT |
166 | unsigned int start, end; |
167 | ||
d2a38ef9 RK |
168 | start = bank_pfn_start(bank); |
169 | end = bank_pfn_end(bank); | |
1da177e4 LT |
170 | |
171 | if (end < start_pfn) | |
172 | continue; | |
173 | ||
174 | if (start < start_pfn) | |
175 | start = start_pfn; | |
176 | ||
177 | if (end <= start) | |
178 | continue; | |
179 | ||
180 | if (end - start >= bootmap_pages) { | |
181 | bootmap_pfn = start; | |
182 | break; | |
183 | } | |
184 | } | |
185 | ||
186 | if (bootmap_pfn == 0) | |
187 | BUG(); | |
188 | ||
189 | return bootmap_pfn; | |
190 | } | |
191 | ||
1da177e4 LT |
192 | static int __init check_initrd(struct meminfo *mi) |
193 | { | |
194 | int initrd_node = -2; | |
195 | #ifdef CONFIG_BLK_DEV_INITRD | |
196 | unsigned long end = phys_initrd_start + phys_initrd_size; | |
197 | ||
198 | /* | |
199 | * Make sure that the initrd is within a valid area of | |
200 | * memory. | |
201 | */ | |
202 | if (phys_initrd_size) { | |
203 | unsigned int i; | |
204 | ||
205 | initrd_node = -1; | |
206 | ||
207 | for (i = 0; i < mi->nr_banks; i++) { | |
d2a38ef9 RK |
208 | struct membank *bank = &mi->bank[i]; |
209 | if (bank_phys_start(bank) <= phys_initrd_start && | |
210 | end <= bank_phys_end(bank)) | |
211 | initrd_node = bank->node; | |
1da177e4 LT |
212 | } |
213 | } | |
214 | ||
215 | if (initrd_node == -1) { | |
b962a286 | 216 | printk(KERN_ERR "INITRD: 0x%08lx+0x%08lx extends beyond " |
1da177e4 | 217 | "physical memory - disabling initrd\n", |
b962a286 | 218 | phys_initrd_start, phys_initrd_size); |
1da177e4 LT |
219 | phys_initrd_start = phys_initrd_size = 0; |
220 | } | |
221 | #endif | |
222 | ||
223 | return initrd_node; | |
224 | } | |
225 | ||
dde5828f RK |
226 | static void __init bootmem_init_node(int node, struct meminfo *mi, |
227 | unsigned long start_pfn, unsigned long end_pfn) | |
1da177e4 | 228 | { |
dde5828f | 229 | unsigned long boot_pfn; |
90072059 RK |
230 | unsigned int boot_pages; |
231 | pg_data_t *pgdat; | |
232 | int i; | |
1da177e4 | 233 | |
90072059 RK |
234 | /* |
235 | * Allocate the bootmem bitmap page. | |
236 | */ | |
237 | boot_pages = bootmem_bootmap_pages(end_pfn - start_pfn); | |
238 | boot_pfn = find_bootmap_pfn(node, mi, boot_pages); | |
1da177e4 | 239 | |
90072059 RK |
240 | /* |
241 | * Initialise the bootmem allocator for this node, handing the | |
242 | * memory banks over to bootmem. | |
243 | */ | |
244 | node_set_online(node); | |
245 | pgdat = NODE_DATA(node); | |
246 | init_bootmem_node(pgdat, boot_pfn, start_pfn, end_pfn); | |
1da177e4 | 247 | |
d2a38ef9 RK |
248 | for_each_nodebank(i, mi, node) { |
249 | struct membank *bank = &mi->bank[i]; | |
dde5828f RK |
250 | if (!bank->highmem) |
251 | free_bootmem_node(pgdat, bank_phys_start(bank), bank_phys_size(bank)); | |
d2a38ef9 | 252 | } |
90072059 RK |
253 | |
254 | /* | |
255 | * Reserve the bootmem bitmap for this node. | |
256 | */ | |
257 | reserve_bootmem_node(pgdat, boot_pfn << PAGE_SHIFT, | |
72a7fe39 | 258 | boot_pages << PAGE_SHIFT, BOOTMEM_DEFAULT); |
b7a69ac3 | 259 | } |
b962a286 | 260 | |
b7a69ac3 RK |
261 | static void __init bootmem_reserve_initrd(int node) |
262 | { | |
1da177e4 | 263 | #ifdef CONFIG_BLK_DEV_INITRD |
b7a69ac3 RK |
264 | pg_data_t *pgdat = NODE_DATA(node); |
265 | int res; | |
266 | ||
267 | res = reserve_bootmem_node(pgdat, phys_initrd_start, | |
268 | phys_initrd_size, BOOTMEM_EXCLUSIVE); | |
269 | ||
270 | if (res == 0) { | |
271 | initrd_start = __phys_to_virt(phys_initrd_start); | |
272 | initrd_end = initrd_start + phys_initrd_size; | |
273 | } else { | |
274 | printk(KERN_ERR | |
275 | "INITRD: 0x%08lx+0x%08lx overlaps in-use " | |
276 | "memory region - disabling initrd\n", | |
277 | phys_initrd_start, phys_initrd_size); | |
1da177e4 LT |
278 | } |
279 | #endif | |
b7a69ac3 RK |
280 | } |
281 | ||
282 | static void __init bootmem_free_node(int node, struct meminfo *mi) | |
283 | { | |
284 | unsigned long zone_size[MAX_NR_ZONES], zhole_size[MAX_NR_ZONES]; | |
dde5828f | 285 | unsigned long min, max_low, max_high; |
b7a69ac3 RK |
286 | int i; |
287 | ||
dde5828f | 288 | find_node_limits(node, mi, &min, &max_low, &max_high); |
1da177e4 | 289 | |
90072059 RK |
290 | /* |
291 | * initialise the zones within this node. | |
292 | */ | |
293 | memset(zone_size, 0, sizeof(zone_size)); | |
90072059 RK |
294 | |
295 | /* | |
296 | * The size of this node has already been determined. If we need | |
297 | * to do anything fancy with the allocation of this memory to the | |
298 | * zones, now is the time to do it. | |
299 | */ | |
dde5828f RK |
300 | zone_size[0] = max_low - min; |
301 | #ifdef CONFIG_HIGHMEM | |
302 | zone_size[ZONE_HIGHMEM] = max_high - max_low; | |
303 | #endif | |
90072059 RK |
304 | |
305 | /* | |
306 | * For each bank in this node, calculate the size of the holes. | |
307 | * holes = node_size - sum(bank_sizes_in_node) | |
308 | */ | |
dde5828f RK |
309 | memcpy(zhole_size, zone_size, sizeof(zhole_size)); |
310 | for_each_nodebank(i, mi, node) { | |
311 | int idx = 0; | |
312 | #ifdef CONFIG_HIGHMEM | |
313 | if (mi->bank[i].highmem) | |
314 | idx = ZONE_HIGHMEM; | |
315 | #endif | |
316 | zhole_size[idx] -= bank_pfn_size(&mi->bank[i]); | |
317 | } | |
90072059 RK |
318 | |
319 | /* | |
320 | * Adjust the sizes according to any special requirements for | |
321 | * this machine type. | |
322 | */ | |
323 | arch_adjust_zones(node, zone_size, zhole_size); | |
324 | ||
dde5828f | 325 | free_area_init_node(node, zone_size, min, zhole_size); |
1da177e4 LT |
326 | } |
327 | ||
b7cfda9f RK |
328 | #ifndef CONFIG_SPARSEMEM |
329 | int pfn_valid(unsigned long pfn) | |
330 | { | |
331 | struct meminfo *mi = &meminfo; | |
332 | unsigned int left = 0, right = mi->nr_banks; | |
333 | ||
334 | do { | |
335 | unsigned int mid = (right + left) / 2; | |
336 | struct membank *bank = &mi->bank[mid]; | |
337 | ||
338 | if (pfn < bank_pfn_start(bank)) | |
339 | right = mid; | |
340 | else if (pfn >= bank_pfn_end(bank)) | |
341 | left = mid + 1; | |
342 | else | |
343 | return 1; | |
344 | } while (left < right); | |
345 | return 0; | |
346 | } | |
347 | EXPORT_SYMBOL(pfn_valid); | |
657e12fd RK |
348 | |
349 | static void arm_memory_present(struct meminfo *mi, int node) | |
350 | { | |
351 | } | |
352 | #else | |
353 | static void arm_memory_present(struct meminfo *mi, int node) | |
354 | { | |
355 | int i; | |
356 | for_each_nodebank(i, mi, node) { | |
357 | struct membank *bank = &mi->bank[i]; | |
358 | memory_present(node, bank_pfn_start(bank), bank_pfn_end(bank)); | |
359 | } | |
360 | } | |
b7cfda9f RK |
361 | #endif |
362 | ||
4b5f32ce | 363 | void __init bootmem_init(void) |
1da177e4 | 364 | { |
4b5f32ce | 365 | struct meminfo *mi = &meminfo; |
dde5828f | 366 | unsigned long min, max_low, max_high; |
eca73214 | 367 | int node, initrd_node; |
1da177e4 | 368 | |
1da177e4 | 369 | /* |
90072059 | 370 | * Locate which node contains the ramdisk image, if any. |
1da177e4 | 371 | */ |
90072059 | 372 | initrd_node = check_initrd(mi); |
1da177e4 | 373 | |
dde5828f RK |
374 | max_low = max_high = 0; |
375 | ||
90072059 RK |
376 | /* |
377 | * Run through each node initialising the bootmem allocator. | |
378 | */ | |
379 | for_each_node(node) { | |
dde5828f RK |
380 | unsigned long node_low, node_high; |
381 | ||
382 | find_node_limits(node, mi, &min, &node_low, &node_high); | |
383 | ||
384 | if (node_low > max_low) | |
385 | max_low = node_low; | |
386 | if (node_high > max_high) | |
387 | max_high = node_high; | |
388 | ||
389 | /* | |
390 | * If there is no memory in this node, ignore it. | |
391 | * (We can't have nodes which have no lowmem) | |
392 | */ | |
393 | if (node_low == 0) | |
394 | continue; | |
395 | ||
396 | bootmem_init_node(node, mi, min, node_low); | |
1da177e4 | 397 | |
b7a69ac3 RK |
398 | /* |
399 | * Reserve any special node zero regions. | |
400 | */ | |
401 | if (node == 0) | |
402 | reserve_node_zero(NODE_DATA(node)); | |
403 | ||
404 | /* | |
405 | * If the initrd is in this node, reserve its memory. | |
406 | */ | |
407 | if (node == initrd_node) | |
408 | bootmem_reserve_initrd(node); | |
657e12fd RK |
409 | |
410 | /* | |
411 | * Sparsemem tries to allocate bootmem in memory_present(), | |
412 | * so must be done after the fixed reservations | |
413 | */ | |
414 | arm_memory_present(mi, node); | |
90072059 | 415 | } |
1da177e4 | 416 | |
b7a69ac3 RK |
417 | /* |
418 | * sparse_init() needs the bootmem allocator up and running. | |
419 | */ | |
420 | sparse_init(); | |
421 | ||
422 | /* | |
423 | * Now free memory in each node - free_area_init_node needs | |
424 | * the sparse mem_map arrays initialized by sparse_init() | |
425 | * for memmap_init_zone(), otherwise all PFNs are invalid. | |
426 | */ | |
427 | for_each_node(node) | |
428 | bootmem_free_node(node, mi); | |
429 | ||
dde5828f | 430 | high_memory = __va((max_low << PAGE_SHIFT) - 1) + 1; |
1da177e4 | 431 | |
90072059 RK |
432 | /* |
433 | * This doesn't seem to be used by the Linux memory manager any | |
434 | * more, but is used by ll_rw_block. If we can get rid of it, we | |
435 | * also get rid of some of the stuff above as well. | |
436 | * | |
437 | * Note: max_low_pfn and max_pfn reflect the number of _pages_ in | |
438 | * the system, not the maximum PFN. | |
439 | */ | |
dde5828f RK |
440 | max_low_pfn = max_low - PHYS_PFN_OFFSET; |
441 | max_pfn = max_high - PHYS_PFN_OFFSET; | |
90072059 | 442 | } |
1da177e4 | 443 | |
6db015e4 | 444 | static inline int free_area(unsigned long pfn, unsigned long end, char *s) |
1da177e4 | 445 | { |
6db015e4 | 446 | unsigned int pages = 0, size = (end - pfn) << (PAGE_SHIFT - 10); |
1da177e4 | 447 | |
6db015e4 NP |
448 | for (; pfn < end; pfn++) { |
449 | struct page *page = pfn_to_page(pfn); | |
1da177e4 | 450 | ClearPageReserved(page); |
7835e98b | 451 | init_page_count(page); |
6db015e4 NP |
452 | __free_page(page); |
453 | pages++; | |
1da177e4 LT |
454 | } |
455 | ||
456 | if (size && s) | |
457 | printk(KERN_INFO "Freeing %s memory: %dK\n", s, size); | |
6db015e4 NP |
458 | |
459 | return pages; | |
1da177e4 LT |
460 | } |
461 | ||
a013053d RK |
462 | static inline void |
463 | free_memmap(int node, unsigned long start_pfn, unsigned long end_pfn) | |
464 | { | |
465 | struct page *start_pg, *end_pg; | |
466 | unsigned long pg, pgend; | |
467 | ||
468 | /* | |
469 | * Convert start_pfn/end_pfn to a struct page pointer. | |
470 | */ | |
3257f43d | 471 | start_pg = pfn_to_page(start_pfn - 1) + 1; |
a013053d RK |
472 | end_pg = pfn_to_page(end_pfn); |
473 | ||
474 | /* | |
475 | * Convert to physical addresses, and | |
476 | * round start upwards and end downwards. | |
477 | */ | |
478 | pg = PAGE_ALIGN(__pa(start_pg)); | |
479 | pgend = __pa(end_pg) & PAGE_MASK; | |
480 | ||
481 | /* | |
482 | * If there are free pages between these, | |
483 | * free the section of the memmap array. | |
484 | */ | |
485 | if (pg < pgend) | |
486 | free_bootmem_node(NODE_DATA(node), pg, pgend - pg); | |
487 | } | |
488 | ||
489 | /* | |
490 | * The mem_map array can get very big. Free the unused area of the memory map. | |
491 | */ | |
492 | static void __init free_unused_memmap_node(int node, struct meminfo *mi) | |
493 | { | |
494 | unsigned long bank_start, prev_bank_end = 0; | |
495 | unsigned int i; | |
496 | ||
497 | /* | |
498 | * [FIXME] This relies on each bank being in address order. This | |
499 | * may not be the case, especially if the user has provided the | |
500 | * information on the command line. | |
501 | */ | |
90072059 | 502 | for_each_nodebank(i, mi, node) { |
d2a38ef9 RK |
503 | struct membank *bank = &mi->bank[i]; |
504 | ||
505 | bank_start = bank_pfn_start(bank); | |
a013053d RK |
506 | if (bank_start < prev_bank_end) { |
507 | printk(KERN_ERR "MEM: unordered memory banks. " | |
508 | "Not freeing memmap.\n"); | |
509 | break; | |
510 | } | |
511 | ||
512 | /* | |
513 | * If we had a previous bank, and there is a space | |
514 | * between the current bank and the previous, free it. | |
515 | */ | |
516 | if (prev_bank_end && prev_bank_end != bank_start) | |
517 | free_memmap(node, prev_bank_end, bank_start); | |
518 | ||
d2a38ef9 | 519 | prev_bank_end = bank_pfn_end(bank); |
a013053d RK |
520 | } |
521 | } | |
522 | ||
1da177e4 LT |
523 | /* |
524 | * mem_init() marks the free areas in the mem_map and tells us how much | |
525 | * memory is free. This is done after various parts of the system have | |
526 | * claimed their memory after the kernel image. | |
527 | */ | |
528 | void __init mem_init(void) | |
529 | { | |
db9ef1af | 530 | unsigned long reserved_pages, free_pages; |
1da177e4 LT |
531 | int i, node; |
532 | ||
1da177e4 | 533 | #ifndef CONFIG_DISCONTIGMEM |
3835f6cb | 534 | max_mapnr = pfn_to_page(max_pfn + PHYS_PFN_OFFSET) - mem_map; |
1da177e4 LT |
535 | #endif |
536 | ||
1da177e4 LT |
537 | /* this will put all unused low memory onto the freelists */ |
538 | for_each_online_node(node) { | |
539 | pg_data_t *pgdat = NODE_DATA(node); | |
540 | ||
a013053d RK |
541 | free_unused_memmap_node(node, &meminfo); |
542 | ||
1da177e4 LT |
543 | if (pgdat->node_spanned_pages != 0) |
544 | totalram_pages += free_all_bootmem_node(pgdat); | |
545 | } | |
546 | ||
547 | #ifdef CONFIG_SA1111 | |
548 | /* now that our DMA memory is actually so designated, we can free it */ | |
6db015e4 NP |
549 | totalram_pages += free_area(PHYS_PFN_OFFSET, |
550 | __phys_to_pfn(__pa(swapper_pg_dir)), NULL); | |
1da177e4 LT |
551 | #endif |
552 | ||
3835f6cb NP |
553 | #ifdef CONFIG_HIGHMEM |
554 | /* set highmem page free */ | |
555 | for_each_online_node(node) { | |
556 | for_each_nodebank (i, &meminfo, node) { | |
557 | unsigned long start = bank_pfn_start(&meminfo.bank[i]); | |
558 | unsigned long end = bank_pfn_end(&meminfo.bank[i]); | |
559 | if (start >= max_low_pfn + PHYS_PFN_OFFSET) | |
560 | totalhigh_pages += free_area(start, end, NULL); | |
561 | } | |
562 | } | |
563 | totalram_pages += totalhigh_pages; | |
564 | #endif | |
565 | ||
db9ef1af FB |
566 | reserved_pages = free_pages = 0; |
567 | ||
568 | for_each_online_node(node) { | |
db9ef1af FB |
569 | for_each_nodebank(i, &meminfo, node) { |
570 | struct membank *bank = &meminfo.bank[i]; | |
571 | unsigned int pfn1, pfn2; | |
572 | struct page *page, *end; | |
573 | ||
574 | pfn1 = bank_pfn_start(bank); | |
575 | pfn2 = bank_pfn_end(bank); | |
576 | ||
ea056df7 CM |
577 | page = pfn_to_page(pfn1); |
578 | end = pfn_to_page(pfn2 - 1) + 1; | |
db9ef1af FB |
579 | |
580 | do { | |
581 | if (PageReserved(page)) | |
582 | reserved_pages++; | |
583 | else if (!page_count(page)) | |
584 | free_pages++; | |
585 | page++; | |
586 | } while (page < end); | |
587 | } | |
588 | } | |
589 | ||
1da177e4 LT |
590 | /* |
591 | * Since our memory may not be contiguous, calculate the | |
592 | * real number of pages we have in this system | |
593 | */ | |
594 | printk(KERN_INFO "Memory:"); | |
1da177e4 LT |
595 | num_physpages = 0; |
596 | for (i = 0; i < meminfo.nr_banks; i++) { | |
d2a38ef9 RK |
597 | num_physpages += bank_pfn_size(&meminfo.bank[i]); |
598 | printk(" %ldMB", bank_phys_size(&meminfo.bank[i]) >> 20); | |
1da177e4 | 599 | } |
1da177e4 | 600 | printk(" = %luMB total\n", num_physpages >> (20 - PAGE_SHIFT)); |
6db015e4 | 601 | |
db9ef1af FB |
602 | printk(KERN_NOTICE "Memory: %luk/%luk available, %luk reserved, %luK highmem\n", |
603 | nr_free_pages() << (PAGE_SHIFT-10), | |
604 | free_pages << (PAGE_SHIFT-10), | |
605 | reserved_pages << (PAGE_SHIFT-10), | |
4b529401 | 606 | totalhigh_pages << (PAGE_SHIFT-10)); |
1da177e4 | 607 | |
db9ef1af FB |
608 | #define MLK(b, t) b, t, ((t) - (b)) >> 10 |
609 | #define MLM(b, t) b, t, ((t) - (b)) >> 20 | |
610 | #define MLK_ROUNDUP(b, t) b, t, DIV_ROUND_UP(((t) - (b)), SZ_1K) | |
611 | ||
612 | printk(KERN_NOTICE "Virtual kernel memory layout:\n" | |
613 | " vector : 0x%08lx - 0x%08lx (%4ld kB)\n" | |
614 | " fixmap : 0x%08lx - 0x%08lx (%4ld kB)\n" | |
a7bd08c8 FB |
615 | #ifdef CONFIG_MMU |
616 | " DMA : 0x%08lx - 0x%08lx (%4ld MB)\n" | |
617 | #endif | |
db9ef1af FB |
618 | " vmalloc : 0x%08lx - 0x%08lx (%4ld MB)\n" |
619 | " lowmem : 0x%08lx - 0x%08lx (%4ld MB)\n" | |
620 | #ifdef CONFIG_HIGHMEM | |
621 | " pkmap : 0x%08lx - 0x%08lx (%4ld MB)\n" | |
622 | #endif | |
623 | " modules : 0x%08lx - 0x%08lx (%4ld MB)\n" | |
624 | " .init : 0x%p" " - 0x%p" " (%4d kB)\n" | |
625 | " .text : 0x%p" " - 0x%p" " (%4d kB)\n" | |
626 | " .data : 0x%p" " - 0x%p" " (%4d kB)\n", | |
627 | ||
628 | MLK(UL(CONFIG_VECTORS_BASE), UL(CONFIG_VECTORS_BASE) + | |
629 | (PAGE_SIZE)), | |
630 | MLK(FIXADDR_START, FIXADDR_TOP), | |
a7bd08c8 FB |
631 | #ifdef CONFIG_MMU |
632 | MLM(CONSISTENT_BASE, CONSISTENT_END), | |
633 | #endif | |
c931b4f6 | 634 | MLM(VMALLOC_START, VMALLOC_END), |
db9ef1af FB |
635 | MLM(PAGE_OFFSET, (unsigned long)high_memory), |
636 | #ifdef CONFIG_HIGHMEM | |
637 | MLM(PKMAP_BASE, (PKMAP_BASE) + (LAST_PKMAP) * | |
638 | (PAGE_SIZE)), | |
639 | #endif | |
640 | MLM(MODULES_VADDR, MODULES_END), | |
641 | ||
642 | MLK_ROUNDUP(__init_begin, __init_end), | |
643 | MLK_ROUNDUP(_text, _etext), | |
644 | MLK_ROUNDUP(_data, _edata)); | |
645 | ||
646 | #undef MLK | |
647 | #undef MLM | |
648 | #undef MLK_ROUNDUP | |
649 | ||
a1839272 FB |
650 | /* |
651 | * Check boundaries twice: Some fundamental inconsistencies can | |
652 | * be detected at build time already. | |
653 | */ | |
654 | #ifdef CONFIG_MMU | |
655 | BUILD_BUG_ON(VMALLOC_END > CONSISTENT_BASE); | |
656 | BUG_ON(VMALLOC_END > CONSISTENT_BASE); | |
657 | ||
658 | BUILD_BUG_ON(TASK_SIZE > MODULES_VADDR); | |
659 | BUG_ON(TASK_SIZE > MODULES_VADDR); | |
660 | #endif | |
661 | ||
662 | #ifdef CONFIG_HIGHMEM | |
663 | BUILD_BUG_ON(PKMAP_BASE + LAST_PKMAP * PAGE_SIZE > PAGE_OFFSET); | |
664 | BUG_ON(PKMAP_BASE + LAST_PKMAP * PAGE_SIZE > PAGE_OFFSET); | |
665 | #endif | |
666 | ||
1da177e4 LT |
667 | if (PAGE_SIZE >= 16384 && num_physpages <= 128) { |
668 | extern int sysctl_overcommit_memory; | |
669 | /* | |
670 | * On a machine this small we won't get | |
671 | * anywhere without overcommit, so turn | |
672 | * it on by default. | |
673 | */ | |
674 | sysctl_overcommit_memory = OVERCOMMIT_ALWAYS; | |
675 | } | |
676 | } | |
677 | ||
678 | void free_initmem(void) | |
679 | { | |
bc581770 | 680 | #ifdef CONFIG_HAVE_TCM |
ea208f64 | 681 | extern char __tcm_start, __tcm_end; |
bc581770 | 682 | |
ea208f64 LW |
683 | totalram_pages += free_area(__phys_to_pfn(__pa(&__tcm_start)), |
684 | __phys_to_pfn(__pa(&__tcm_end)), | |
bc581770 LW |
685 | "TCM link"); |
686 | #endif | |
687 | ||
6db015e4 | 688 | if (!machine_is_integrator() && !machine_is_cintegrator()) |
37efe642 RK |
689 | totalram_pages += free_area(__phys_to_pfn(__pa(__init_begin)), |
690 | __phys_to_pfn(__pa(__init_end)), | |
6db015e4 | 691 | "init"); |
1da177e4 LT |
692 | } |
693 | ||
694 | #ifdef CONFIG_BLK_DEV_INITRD | |
695 | ||
696 | static int keep_initrd; | |
697 | ||
698 | void free_initrd_mem(unsigned long start, unsigned long end) | |
699 | { | |
700 | if (!keep_initrd) | |
6db015e4 NP |
701 | totalram_pages += free_area(__phys_to_pfn(__pa(start)), |
702 | __phys_to_pfn(__pa(end)), | |
703 | "initrd"); | |
1da177e4 LT |
704 | } |
705 | ||
706 | static int __init keepinitrd_setup(char *__unused) | |
707 | { | |
708 | keep_initrd = 1; | |
709 | return 1; | |
710 | } | |
711 | ||
712 | __setup("keepinitrd", keepinitrd_setup); | |
713 | #endif |