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> | |
b7cfda9f | 18 | #include <linux/sort.h> |
3835f6cb | 19 | #include <linux/highmem.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 LT |
25 | #include <asm/tlb.h> |
26 | ||
27 | #include <asm/mach/arch.h> | |
28 | #include <asm/mach/map.h> | |
29 | ||
1b2e2b73 RK |
30 | #include "mm.h" |
31 | ||
012d1f4a RK |
32 | static unsigned long phys_initrd_start __initdata = 0; |
33 | static unsigned long phys_initrd_size __initdata = 0; | |
34 | ||
35 | static void __init early_initrd(char **p) | |
36 | { | |
37 | unsigned long start, size; | |
38 | ||
39 | start = memparse(*p, p); | |
40 | if (**p == ',') { | |
41 | size = memparse((*p) + 1, p); | |
42 | ||
43 | phys_initrd_start = start; | |
44 | phys_initrd_size = size; | |
45 | } | |
46 | } | |
47 | __early_param("initrd=", early_initrd); | |
48 | ||
49 | static int __init parse_tag_initrd(const struct tag *tag) | |
50 | { | |
51 | printk(KERN_WARNING "ATAG_INITRD is deprecated; " | |
52 | "please update your bootloader.\n"); | |
53 | phys_initrd_start = __virt_to_phys(tag->u.initrd.start); | |
54 | phys_initrd_size = tag->u.initrd.size; | |
55 | return 0; | |
56 | } | |
57 | ||
58 | __tagtable(ATAG_INITRD, parse_tag_initrd); | |
59 | ||
60 | static int __init parse_tag_initrd2(const struct tag *tag) | |
61 | { | |
62 | phys_initrd_start = tag->u.initrd.start; | |
63 | phys_initrd_size = tag->u.initrd.size; | |
64 | return 0; | |
65 | } | |
66 | ||
67 | __tagtable(ATAG_INITRD2, parse_tag_initrd2); | |
1da177e4 LT |
68 | |
69 | /* | |
4b5f32ce NP |
70 | * This keeps memory configuration data used by a couple memory |
71 | * initialization functions, as well as show_mem() for the skipping | |
72 | * of holes in the memory map. It is populated by arm_add_memory(). | |
1da177e4 | 73 | */ |
4b5f32ce | 74 | struct meminfo meminfo; |
5e709827 | 75 | |
1da177e4 LT |
76 | void show_mem(void) |
77 | { | |
78 | int free = 0, total = 0, reserved = 0; | |
5e709827 RL |
79 | int shared = 0, cached = 0, slab = 0, node, i; |
80 | struct meminfo * mi = &meminfo; | |
1da177e4 LT |
81 | |
82 | printk("Mem-info:\n"); | |
83 | show_free_areas(); | |
1da177e4 | 84 | for_each_online_node(node) { |
204ecae4 | 85 | pg_data_t *n = NODE_DATA(node); |
b7a69ac3 | 86 | struct page *map = pgdat_page_nr(n, 0) - n->node_start_pfn; |
204ecae4 | 87 | |
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 | |
204ecae4 RK |
96 | page = map + pfn1; |
97 | end = map + pfn2; | |
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 | ||
456335e2 RK |
226 | static inline void map_memory_bank(struct membank *bank) |
227 | { | |
d111e8f9 | 228 | #ifdef CONFIG_MMU |
456335e2 RK |
229 | struct map_desc map; |
230 | ||
d2a38ef9 RK |
231 | map.pfn = bank_pfn_start(bank); |
232 | map.virtual = __phys_to_virt(bank_phys_start(bank)); | |
233 | map.length = bank_phys_size(bank); | |
456335e2 RK |
234 | map.type = MT_MEMORY; |
235 | ||
236 | create_mapping(&map); | |
d111e8f9 | 237 | #endif |
456335e2 RK |
238 | } |
239 | ||
dde5828f RK |
240 | static void __init bootmem_init_node(int node, struct meminfo *mi, |
241 | unsigned long start_pfn, unsigned long end_pfn) | |
1da177e4 | 242 | { |
dde5828f | 243 | unsigned long boot_pfn; |
90072059 RK |
244 | unsigned int boot_pages; |
245 | pg_data_t *pgdat; | |
246 | int i; | |
1da177e4 | 247 | |
90072059 | 248 | /* |
dde5828f | 249 | * Map the memory banks for this node. |
90072059 RK |
250 | */ |
251 | for_each_nodebank(i, mi, node) { | |
456335e2 | 252 | struct membank *bank = &mi->bank[i]; |
90072059 | 253 | |
dde5828f RK |
254 | if (!bank->highmem) |
255 | map_memory_bank(bank); | |
90072059 | 256 | } |
1da177e4 | 257 | |
90072059 RK |
258 | /* |
259 | * Allocate the bootmem bitmap page. | |
260 | */ | |
261 | boot_pages = bootmem_bootmap_pages(end_pfn - start_pfn); | |
262 | boot_pfn = find_bootmap_pfn(node, mi, boot_pages); | |
1da177e4 | 263 | |
90072059 RK |
264 | /* |
265 | * Initialise the bootmem allocator for this node, handing the | |
266 | * memory banks over to bootmem. | |
267 | */ | |
268 | node_set_online(node); | |
269 | pgdat = NODE_DATA(node); | |
270 | init_bootmem_node(pgdat, boot_pfn, start_pfn, end_pfn); | |
1da177e4 | 271 | |
d2a38ef9 RK |
272 | for_each_nodebank(i, mi, node) { |
273 | struct membank *bank = &mi->bank[i]; | |
dde5828f RK |
274 | if (!bank->highmem) |
275 | free_bootmem_node(pgdat, bank_phys_start(bank), bank_phys_size(bank)); | |
b7a69ac3 | 276 | memory_present(node, bank_pfn_start(bank), bank_pfn_end(bank)); |
d2a38ef9 | 277 | } |
90072059 RK |
278 | |
279 | /* | |
280 | * Reserve the bootmem bitmap for this node. | |
281 | */ | |
282 | reserve_bootmem_node(pgdat, boot_pfn << PAGE_SHIFT, | |
72a7fe39 | 283 | boot_pages << PAGE_SHIFT, BOOTMEM_DEFAULT); |
b7a69ac3 | 284 | } |
b962a286 | 285 | |
b7a69ac3 RK |
286 | static void __init bootmem_reserve_initrd(int node) |
287 | { | |
1da177e4 | 288 | #ifdef CONFIG_BLK_DEV_INITRD |
b7a69ac3 RK |
289 | pg_data_t *pgdat = NODE_DATA(node); |
290 | int res; | |
291 | ||
292 | res = reserve_bootmem_node(pgdat, phys_initrd_start, | |
293 | phys_initrd_size, BOOTMEM_EXCLUSIVE); | |
294 | ||
295 | if (res == 0) { | |
296 | initrd_start = __phys_to_virt(phys_initrd_start); | |
297 | initrd_end = initrd_start + phys_initrd_size; | |
298 | } else { | |
299 | printk(KERN_ERR | |
300 | "INITRD: 0x%08lx+0x%08lx overlaps in-use " | |
301 | "memory region - disabling initrd\n", | |
302 | phys_initrd_start, phys_initrd_size); | |
1da177e4 LT |
303 | } |
304 | #endif | |
b7a69ac3 RK |
305 | } |
306 | ||
307 | static void __init bootmem_free_node(int node, struct meminfo *mi) | |
308 | { | |
309 | unsigned long zone_size[MAX_NR_ZONES], zhole_size[MAX_NR_ZONES]; | |
dde5828f | 310 | unsigned long min, max_low, max_high; |
b7a69ac3 RK |
311 | int i; |
312 | ||
dde5828f | 313 | find_node_limits(node, mi, &min, &max_low, &max_high); |
1da177e4 | 314 | |
90072059 RK |
315 | /* |
316 | * initialise the zones within this node. | |
317 | */ | |
318 | memset(zone_size, 0, sizeof(zone_size)); | |
90072059 RK |
319 | |
320 | /* | |
321 | * The size of this node has already been determined. If we need | |
322 | * to do anything fancy with the allocation of this memory to the | |
323 | * zones, now is the time to do it. | |
324 | */ | |
dde5828f RK |
325 | zone_size[0] = max_low - min; |
326 | #ifdef CONFIG_HIGHMEM | |
327 | zone_size[ZONE_HIGHMEM] = max_high - max_low; | |
328 | #endif | |
90072059 RK |
329 | |
330 | /* | |
331 | * For each bank in this node, calculate the size of the holes. | |
332 | * holes = node_size - sum(bank_sizes_in_node) | |
333 | */ | |
dde5828f RK |
334 | memcpy(zhole_size, zone_size, sizeof(zhole_size)); |
335 | for_each_nodebank(i, mi, node) { | |
336 | int idx = 0; | |
337 | #ifdef CONFIG_HIGHMEM | |
338 | if (mi->bank[i].highmem) | |
339 | idx = ZONE_HIGHMEM; | |
340 | #endif | |
341 | zhole_size[idx] -= bank_pfn_size(&mi->bank[i]); | |
342 | } | |
90072059 RK |
343 | |
344 | /* | |
345 | * Adjust the sizes according to any special requirements for | |
346 | * this machine type. | |
347 | */ | |
348 | arch_adjust_zones(node, zone_size, zhole_size); | |
349 | ||
dde5828f | 350 | free_area_init_node(node, zone_size, min, zhole_size); |
1da177e4 LT |
351 | } |
352 | ||
b7cfda9f RK |
353 | #ifndef CONFIG_SPARSEMEM |
354 | int pfn_valid(unsigned long pfn) | |
355 | { | |
356 | struct meminfo *mi = &meminfo; | |
357 | unsigned int left = 0, right = mi->nr_banks; | |
358 | ||
359 | do { | |
360 | unsigned int mid = (right + left) / 2; | |
361 | struct membank *bank = &mi->bank[mid]; | |
362 | ||
363 | if (pfn < bank_pfn_start(bank)) | |
364 | right = mid; | |
365 | else if (pfn >= bank_pfn_end(bank)) | |
366 | left = mid + 1; | |
367 | else | |
368 | return 1; | |
369 | } while (left < right); | |
370 | return 0; | |
371 | } | |
372 | EXPORT_SYMBOL(pfn_valid); | |
373 | #endif | |
374 | ||
375 | static int __init meminfo_cmp(const void *_a, const void *_b) | |
376 | { | |
377 | const struct membank *a = _a, *b = _b; | |
378 | long cmp = bank_pfn_start(a) - bank_pfn_start(b); | |
379 | return cmp < 0 ? -1 : cmp > 0 ? 1 : 0; | |
380 | } | |
381 | ||
4b5f32ce | 382 | void __init bootmem_init(void) |
1da177e4 | 383 | { |
4b5f32ce | 384 | struct meminfo *mi = &meminfo; |
dde5828f | 385 | unsigned long min, max_low, max_high; |
eca73214 | 386 | int node, initrd_node; |
1da177e4 | 387 | |
b7cfda9f RK |
388 | sort(&mi->bank, mi->nr_banks, sizeof(mi->bank[0]), meminfo_cmp, NULL); |
389 | ||
1da177e4 | 390 | /* |
90072059 | 391 | * Locate which node contains the ramdisk image, if any. |
1da177e4 | 392 | */ |
90072059 | 393 | initrd_node = check_initrd(mi); |
1da177e4 | 394 | |
dde5828f RK |
395 | max_low = max_high = 0; |
396 | ||
90072059 RK |
397 | /* |
398 | * Run through each node initialising the bootmem allocator. | |
399 | */ | |
400 | for_each_node(node) { | |
dde5828f RK |
401 | unsigned long node_low, node_high; |
402 | ||
403 | find_node_limits(node, mi, &min, &node_low, &node_high); | |
404 | ||
405 | if (node_low > max_low) | |
406 | max_low = node_low; | |
407 | if (node_high > max_high) | |
408 | max_high = node_high; | |
409 | ||
410 | /* | |
411 | * If there is no memory in this node, ignore it. | |
412 | * (We can't have nodes which have no lowmem) | |
413 | */ | |
414 | if (node_low == 0) | |
415 | continue; | |
416 | ||
417 | bootmem_init_node(node, mi, min, node_low); | |
1da177e4 | 418 | |
b7a69ac3 RK |
419 | /* |
420 | * Reserve any special node zero regions. | |
421 | */ | |
422 | if (node == 0) | |
423 | reserve_node_zero(NODE_DATA(node)); | |
424 | ||
425 | /* | |
426 | * If the initrd is in this node, reserve its memory. | |
427 | */ | |
428 | if (node == initrd_node) | |
429 | bootmem_reserve_initrd(node); | |
90072059 | 430 | } |
1da177e4 | 431 | |
b7a69ac3 RK |
432 | /* |
433 | * sparse_init() needs the bootmem allocator up and running. | |
434 | */ | |
435 | sparse_init(); | |
436 | ||
437 | /* | |
438 | * Now free memory in each node - free_area_init_node needs | |
439 | * the sparse mem_map arrays initialized by sparse_init() | |
440 | * for memmap_init_zone(), otherwise all PFNs are invalid. | |
441 | */ | |
442 | for_each_node(node) | |
443 | bootmem_free_node(node, mi); | |
444 | ||
dde5828f | 445 | high_memory = __va((max_low << PAGE_SHIFT) - 1) + 1; |
1da177e4 | 446 | |
90072059 RK |
447 | /* |
448 | * This doesn't seem to be used by the Linux memory manager any | |
449 | * more, but is used by ll_rw_block. If we can get rid of it, we | |
450 | * also get rid of some of the stuff above as well. | |
451 | * | |
452 | * Note: max_low_pfn and max_pfn reflect the number of _pages_ in | |
453 | * the system, not the maximum PFN. | |
454 | */ | |
dde5828f RK |
455 | max_low_pfn = max_low - PHYS_PFN_OFFSET; |
456 | max_pfn = max_high - PHYS_PFN_OFFSET; | |
90072059 | 457 | } |
1da177e4 | 458 | |
6db015e4 | 459 | static inline int free_area(unsigned long pfn, unsigned long end, char *s) |
1da177e4 | 460 | { |
6db015e4 | 461 | unsigned int pages = 0, size = (end - pfn) << (PAGE_SHIFT - 10); |
1da177e4 | 462 | |
6db015e4 NP |
463 | for (; pfn < end; pfn++) { |
464 | struct page *page = pfn_to_page(pfn); | |
1da177e4 | 465 | ClearPageReserved(page); |
7835e98b | 466 | init_page_count(page); |
6db015e4 NP |
467 | __free_page(page); |
468 | pages++; | |
1da177e4 LT |
469 | } |
470 | ||
471 | if (size && s) | |
472 | printk(KERN_INFO "Freeing %s memory: %dK\n", s, size); | |
6db015e4 NP |
473 | |
474 | return pages; | |
1da177e4 LT |
475 | } |
476 | ||
a013053d RK |
477 | static inline void |
478 | free_memmap(int node, unsigned long start_pfn, unsigned long end_pfn) | |
479 | { | |
480 | struct page *start_pg, *end_pg; | |
481 | unsigned long pg, pgend; | |
482 | ||
483 | /* | |
484 | * Convert start_pfn/end_pfn to a struct page pointer. | |
485 | */ | |
486 | start_pg = pfn_to_page(start_pfn); | |
487 | end_pg = pfn_to_page(end_pfn); | |
488 | ||
489 | /* | |
490 | * Convert to physical addresses, and | |
491 | * round start upwards and end downwards. | |
492 | */ | |
493 | pg = PAGE_ALIGN(__pa(start_pg)); | |
494 | pgend = __pa(end_pg) & PAGE_MASK; | |
495 | ||
496 | /* | |
497 | * If there are free pages between these, | |
498 | * free the section of the memmap array. | |
499 | */ | |
500 | if (pg < pgend) | |
501 | free_bootmem_node(NODE_DATA(node), pg, pgend - pg); | |
502 | } | |
503 | ||
504 | /* | |
505 | * The mem_map array can get very big. Free the unused area of the memory map. | |
506 | */ | |
507 | static void __init free_unused_memmap_node(int node, struct meminfo *mi) | |
508 | { | |
509 | unsigned long bank_start, prev_bank_end = 0; | |
510 | unsigned int i; | |
511 | ||
512 | /* | |
513 | * [FIXME] This relies on each bank being in address order. This | |
514 | * may not be the case, especially if the user has provided the | |
515 | * information on the command line. | |
516 | */ | |
90072059 | 517 | for_each_nodebank(i, mi, node) { |
d2a38ef9 RK |
518 | struct membank *bank = &mi->bank[i]; |
519 | ||
520 | bank_start = bank_pfn_start(bank); | |
a013053d RK |
521 | if (bank_start < prev_bank_end) { |
522 | printk(KERN_ERR "MEM: unordered memory banks. " | |
523 | "Not freeing memmap.\n"); | |
524 | break; | |
525 | } | |
526 | ||
527 | /* | |
528 | * If we had a previous bank, and there is a space | |
529 | * between the current bank and the previous, free it. | |
530 | */ | |
531 | if (prev_bank_end && prev_bank_end != bank_start) | |
532 | free_memmap(node, prev_bank_end, bank_start); | |
533 | ||
d2a38ef9 | 534 | prev_bank_end = bank_pfn_end(bank); |
a013053d RK |
535 | } |
536 | } | |
537 | ||
1da177e4 LT |
538 | /* |
539 | * mem_init() marks the free areas in the mem_map and tells us how much | |
540 | * memory is free. This is done after various parts of the system have | |
541 | * claimed their memory after the kernel image. | |
542 | */ | |
543 | void __init mem_init(void) | |
544 | { | |
6db015e4 | 545 | unsigned int codesize, datasize, initsize; |
1da177e4 LT |
546 | int i, node; |
547 | ||
1da177e4 | 548 | #ifndef CONFIG_DISCONTIGMEM |
3835f6cb | 549 | max_mapnr = pfn_to_page(max_pfn + PHYS_PFN_OFFSET) - mem_map; |
1da177e4 LT |
550 | #endif |
551 | ||
1da177e4 LT |
552 | /* this will put all unused low memory onto the freelists */ |
553 | for_each_online_node(node) { | |
554 | pg_data_t *pgdat = NODE_DATA(node); | |
555 | ||
a013053d RK |
556 | free_unused_memmap_node(node, &meminfo); |
557 | ||
1da177e4 LT |
558 | if (pgdat->node_spanned_pages != 0) |
559 | totalram_pages += free_all_bootmem_node(pgdat); | |
560 | } | |
561 | ||
562 | #ifdef CONFIG_SA1111 | |
563 | /* now that our DMA memory is actually so designated, we can free it */ | |
6db015e4 NP |
564 | totalram_pages += free_area(PHYS_PFN_OFFSET, |
565 | __phys_to_pfn(__pa(swapper_pg_dir)), NULL); | |
1da177e4 LT |
566 | #endif |
567 | ||
3835f6cb NP |
568 | #ifdef CONFIG_HIGHMEM |
569 | /* set highmem page free */ | |
570 | for_each_online_node(node) { | |
571 | for_each_nodebank (i, &meminfo, node) { | |
572 | unsigned long start = bank_pfn_start(&meminfo.bank[i]); | |
573 | unsigned long end = bank_pfn_end(&meminfo.bank[i]); | |
574 | if (start >= max_low_pfn + PHYS_PFN_OFFSET) | |
575 | totalhigh_pages += free_area(start, end, NULL); | |
576 | } | |
577 | } | |
578 | totalram_pages += totalhigh_pages; | |
579 | #endif | |
580 | ||
1da177e4 LT |
581 | /* |
582 | * Since our memory may not be contiguous, calculate the | |
583 | * real number of pages we have in this system | |
584 | */ | |
585 | printk(KERN_INFO "Memory:"); | |
1da177e4 LT |
586 | num_physpages = 0; |
587 | for (i = 0; i < meminfo.nr_banks; i++) { | |
d2a38ef9 RK |
588 | num_physpages += bank_pfn_size(&meminfo.bank[i]); |
589 | printk(" %ldMB", bank_phys_size(&meminfo.bank[i]) >> 20); | |
1da177e4 | 590 | } |
1da177e4 | 591 | printk(" = %luMB total\n", num_physpages >> (20 - PAGE_SHIFT)); |
6db015e4 | 592 | |
37efe642 RK |
593 | codesize = _etext - _text; |
594 | datasize = _end - _data; | |
595 | initsize = __init_end - __init_begin; | |
6db015e4 | 596 | |
1da177e4 | 597 | printk(KERN_NOTICE "Memory: %luKB available (%dK code, " |
3835f6cb | 598 | "%dK data, %dK init, %luK highmem)\n", |
cc013a88 GU |
599 | nr_free_pages() << (PAGE_SHIFT-10), codesize >> 10, |
600 | datasize >> 10, initsize >> 10, | |
3835f6cb | 601 | (unsigned long) (totalhigh_pages << (PAGE_SHIFT-10))); |
1da177e4 LT |
602 | |
603 | if (PAGE_SIZE >= 16384 && num_physpages <= 128) { | |
604 | extern int sysctl_overcommit_memory; | |
605 | /* | |
606 | * On a machine this small we won't get | |
607 | * anywhere without overcommit, so turn | |
608 | * it on by default. | |
609 | */ | |
610 | sysctl_overcommit_memory = OVERCOMMIT_ALWAYS; | |
611 | } | |
612 | } | |
613 | ||
614 | void free_initmem(void) | |
615 | { | |
6db015e4 | 616 | if (!machine_is_integrator() && !machine_is_cintegrator()) |
37efe642 RK |
617 | totalram_pages += free_area(__phys_to_pfn(__pa(__init_begin)), |
618 | __phys_to_pfn(__pa(__init_end)), | |
6db015e4 | 619 | "init"); |
1da177e4 LT |
620 | } |
621 | ||
622 | #ifdef CONFIG_BLK_DEV_INITRD | |
623 | ||
624 | static int keep_initrd; | |
625 | ||
626 | void free_initrd_mem(unsigned long start, unsigned long end) | |
627 | { | |
628 | if (!keep_initrd) | |
6db015e4 NP |
629 | totalram_pages += free_area(__phys_to_pfn(__pa(start)), |
630 | __phys_to_pfn(__pa(end)), | |
631 | "initrd"); | |
1da177e4 LT |
632 | } |
633 | ||
634 | static int __init keepinitrd_setup(char *__unused) | |
635 | { | |
636 | keep_initrd = 1; | |
637 | return 1; | |
638 | } | |
639 | ||
640 | __setup("keepinitrd", keepinitrd_setup); | |
641 | #endif |