init.c 17.0 KB
Newer Older
L
Linus Torvalds 已提交
1 2 3
/*
 *  linux/arch/arm/mm/init.c
 *
R
Russell King 已提交
4
 *  Copyright (C) 1995-2005 Russell King
L
Linus Torvalds 已提交
5 6 7 8 9 10 11 12 13 14 15 16 17
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License version 2 as
 * published by the Free Software Foundation.
 */
#include <linux/kernel.h>
#include <linux/errno.h>
#include <linux/swap.h>
#include <linux/init.h>
#include <linux/bootmem.h>
#include <linux/mman.h>
#include <linux/nodemask.h>
#include <linux/initrd.h>
18
#include <linux/highmem.h>
19
#include <linux/gfp.h>
L
Linus Torvalds 已提交
20 21

#include <asm/mach-types.h>
R
Russell King 已提交
22
#include <asm/sections.h>
L
Linus Torvalds 已提交
23
#include <asm/setup.h>
24
#include <asm/sizes.h>
L
Linus Torvalds 已提交
25
#include <asm/tlb.h>
26
#include <asm/fixmap.h>
L
Linus Torvalds 已提交
27 28 29 30

#include <asm/mach/arch.h>
#include <asm/mach/map.h>

31 32
#include "mm.h"

33 34 35
static unsigned long phys_initrd_start __initdata = 0;
static unsigned long phys_initrd_size __initdata = 0;

36
static int __init early_initrd(char *p)
37 38
{
	unsigned long start, size;
39
	char *endp;
40

41 42 43
	start = memparse(p, &endp);
	if (*endp == ',') {
		size = memparse(endp + 1, NULL);
44 45 46 47

		phys_initrd_start = start;
		phys_initrd_size = size;
	}
48
	return 0;
49
}
50
early_param("initrd", early_initrd);
51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70

static int __init parse_tag_initrd(const struct tag *tag)
{
	printk(KERN_WARNING "ATAG_INITRD is deprecated; "
		"please update your bootloader.\n");
	phys_initrd_start = __virt_to_phys(tag->u.initrd.start);
	phys_initrd_size = tag->u.initrd.size;
	return 0;
}

__tagtable(ATAG_INITRD, parse_tag_initrd);

static int __init parse_tag_initrd2(const struct tag *tag)
{
	phys_initrd_start = tag->u.initrd.start;
	phys_initrd_size = tag->u.initrd.size;
	return 0;
}

__tagtable(ATAG_INITRD2, parse_tag_initrd2);
L
Linus Torvalds 已提交
71 72

/*
73 74 75
 * This keeps memory configuration data used by a couple memory
 * initialization functions, as well as show_mem() for the skipping
 * of holes in the memory map.  It is populated by arm_add_memory().
L
Linus Torvalds 已提交
76
 */
77
struct meminfo meminfo;
78

L
Linus Torvalds 已提交
79 80 81
void show_mem(void)
{
	int free = 0, total = 0, reserved = 0;
82 83
	int shared = 0, cached = 0, slab = 0, node, i;
	struct meminfo * mi = &meminfo;
L
Linus Torvalds 已提交
84 85 86 87

	printk("Mem-info:\n");
	show_free_areas();
	for_each_online_node(node) {
88
		for_each_nodebank (i,mi,node) {
89
			struct membank *bank = &mi->bank[i];
90 91 92
			unsigned int pfn1, pfn2;
			struct page *page, *end;

93 94
			pfn1 = bank_pfn_start(bank);
			pfn2 = bank_pfn_end(bank);
95

96 97
			page = pfn_to_page(pfn1);
			end  = pfn_to_page(pfn2 - 1) + 1;
98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113

			do {
				total++;
				if (PageReserved(page))
					reserved++;
				else if (PageSwapCache(page))
					cached++;
				else if (PageSlab(page))
					slab++;
				else if (!page_count(page))
					free++;
				else
					shared += page_count(page) - 1;
				page++;
			} while (page < end);
		}
L
Linus Torvalds 已提交
114 115 116 117 118 119 120 121 122 123
	}

	printk("%d pages of RAM\n", total);
	printk("%d free pages\n", free);
	printk("%d reserved pages\n", reserved);
	printk("%d slab pages\n", slab);
	printk("%d pages shared\n", shared);
	printk("%d pages swap cached\n", cached);
}

R
Russell King 已提交
124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149
static void __init find_node_limits(int node, struct meminfo *mi,
	unsigned long *min, unsigned long *max_low, unsigned long *max_high)
{
	int i;

	*min = -1UL;
	*max_low = *max_high = 0;

	for_each_nodebank(i, mi, node) {
		struct membank *bank = &mi->bank[i];
		unsigned long start, end;

		start = bank_pfn_start(bank);
		end = bank_pfn_end(bank);

		if (*min > start)
			*min = start;
		if (*max_high < end)
			*max_high = end;
		if (bank->highmem)
			continue;
		if (*max_low < end)
			*max_low = end;
	}
}

L
Linus Torvalds 已提交
150 151 152 153 154 155 156 157 158
/*
 * FIXME: We really want to avoid allocating the bootmap bitmap
 * over the top of the initrd.  Hopefully, this is located towards
 * the start of a bank, so if we allocate the bootmap bitmap at
 * the end, we won't clash.
 */
static unsigned int __init
find_bootmap_pfn(int node, struct meminfo *mi, unsigned int bootmap_pages)
{
159
	unsigned int start_pfn, i, bootmap_pfn;
L
Linus Torvalds 已提交
160

R
Russell King 已提交
161
	start_pfn   = PAGE_ALIGN(__pa(_end)) >> PAGE_SHIFT;
L
Linus Torvalds 已提交
162 163
	bootmap_pfn = 0;

164 165
	for_each_nodebank(i, mi, node) {
		struct membank *bank = &mi->bank[i];
L
Linus Torvalds 已提交
166 167
		unsigned int start, end;

168 169
		start = bank_pfn_start(bank);
		end   = bank_pfn_end(bank);
L
Linus Torvalds 已提交
170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207

		if (end < start_pfn)
			continue;

		if (start < start_pfn)
			start = start_pfn;

		if (end <= start)
			continue;

		if (end - start >= bootmap_pages) {
			bootmap_pfn = start;
			break;
		}
	}

	if (bootmap_pfn == 0)
		BUG();

	return bootmap_pfn;
}

static int __init check_initrd(struct meminfo *mi)
{
	int initrd_node = -2;
#ifdef CONFIG_BLK_DEV_INITRD
	unsigned long end = phys_initrd_start + phys_initrd_size;

	/*
	 * Make sure that the initrd is within a valid area of
	 * memory.
	 */
	if (phys_initrd_size) {
		unsigned int i;

		initrd_node = -1;

		for (i = 0; i < mi->nr_banks; i++) {
208 209 210 211
			struct membank *bank = &mi->bank[i];
			if (bank_phys_start(bank) <= phys_initrd_start &&
			    end <= bank_phys_end(bank))
				initrd_node = bank->node;
L
Linus Torvalds 已提交
212 213 214 215
		}
	}

	if (initrd_node == -1) {
216
		printk(KERN_ERR "INITRD: 0x%08lx+0x%08lx extends beyond "
L
Linus Torvalds 已提交
217
		       "physical memory - disabling initrd\n",
218
		       phys_initrd_start, phys_initrd_size);
L
Linus Torvalds 已提交
219 220 221 222 223 224 225
		phys_initrd_start = phys_initrd_size = 0;
	}
#endif

	return initrd_node;
}

R
Russell King 已提交
226 227
static void __init bootmem_init_node(int node, struct meminfo *mi,
	unsigned long start_pfn, unsigned long end_pfn)
L
Linus Torvalds 已提交
228
{
R
Russell King 已提交
229
	unsigned long boot_pfn;
R
Russell King 已提交
230 231 232
	unsigned int boot_pages;
	pg_data_t *pgdat;
	int i;
L
Linus Torvalds 已提交
233

R
Russell King 已提交
234 235 236 237 238
	/*
	 * Allocate the bootmem bitmap page.
	 */
	boot_pages = bootmem_bootmap_pages(end_pfn - start_pfn);
	boot_pfn = find_bootmap_pfn(node, mi, boot_pages);
L
Linus Torvalds 已提交
239

R
Russell King 已提交
240 241 242 243 244 245 246
	/*
	 * Initialise the bootmem allocator for this node, handing the
	 * memory banks over to bootmem.
	 */
	node_set_online(node);
	pgdat = NODE_DATA(node);
	init_bootmem_node(pgdat, boot_pfn, start_pfn, end_pfn);
L
Linus Torvalds 已提交
247

248 249
	for_each_nodebank(i, mi, node) {
		struct membank *bank = &mi->bank[i];
R
Russell King 已提交
250 251
		if (!bank->highmem)
			free_bootmem_node(pgdat, bank_phys_start(bank), bank_phys_size(bank));
252
	}
R
Russell King 已提交
253 254 255 256 257

	/*
	 * Reserve the bootmem bitmap for this node.
	 */
	reserve_bootmem_node(pgdat, boot_pfn << PAGE_SHIFT,
258
			     boot_pages << PAGE_SHIFT, BOOTMEM_DEFAULT);
259
}
260

261 262
static void __init bootmem_reserve_initrd(int node)
{
L
Linus Torvalds 已提交
263
#ifdef CONFIG_BLK_DEV_INITRD
264 265 266 267 268 269 270 271 272 273 274 275 276 277
	pg_data_t *pgdat = NODE_DATA(node);
	int res;

	res = reserve_bootmem_node(pgdat, phys_initrd_start,
			     phys_initrd_size, BOOTMEM_EXCLUSIVE);

	if (res == 0) {
		initrd_start = __phys_to_virt(phys_initrd_start);
		initrd_end = initrd_start + phys_initrd_size;
	} else {
		printk(KERN_ERR
			"INITRD: 0x%08lx+0x%08lx overlaps in-use "
			"memory region - disabling initrd\n",
			phys_initrd_start, phys_initrd_size);
L
Linus Torvalds 已提交
278 279
	}
#endif
280 281 282 283 284
}

static void __init bootmem_free_node(int node, struct meminfo *mi)
{
	unsigned long zone_size[MAX_NR_ZONES], zhole_size[MAX_NR_ZONES];
R
Russell King 已提交
285
	unsigned long min, max_low, max_high;
286 287
	int i;

R
Russell King 已提交
288
	find_node_limits(node, mi, &min, &max_low, &max_high);
L
Linus Torvalds 已提交
289

R
Russell King 已提交
290 291 292 293 294 295 296 297 298 299
	/*
	 * initialise the zones within this node.
	 */
	memset(zone_size, 0, sizeof(zone_size));

	/*
	 * The size of this node has already been determined.  If we need
	 * to do anything fancy with the allocation of this memory to the
	 * zones, now is the time to do it.
	 */
R
Russell King 已提交
300 301 302 303
	zone_size[0] = max_low - min;
#ifdef CONFIG_HIGHMEM
	zone_size[ZONE_HIGHMEM] = max_high - max_low;
#endif
R
Russell King 已提交
304 305 306 307 308

	/*
	 * For each bank in this node, calculate the size of the holes.
	 *  holes = node_size - sum(bank_sizes_in_node)
	 */
R
Russell King 已提交
309 310 311 312 313 314 315 316 317
	memcpy(zhole_size, zone_size, sizeof(zhole_size));
	for_each_nodebank(i, mi, node) {
		int idx = 0;
#ifdef CONFIG_HIGHMEM
		if (mi->bank[i].highmem)
			idx = ZONE_HIGHMEM;
#endif
		zhole_size[idx] -= bank_pfn_size(&mi->bank[i]);
	}
R
Russell King 已提交
318 319 320 321 322 323 324

	/*
	 * Adjust the sizes according to any special requirements for
	 * this machine type.
	 */
	arch_adjust_zones(node, zone_size, zhole_size);

R
Russell King 已提交
325
	free_area_init_node(node, zone_size, min, zhole_size);
L
Linus Torvalds 已提交
326 327
}

328 329 330 331 332 333 334 335 336 337 338 339 340 341 342 343 344 345 346 347
#ifndef CONFIG_SPARSEMEM
int pfn_valid(unsigned long pfn)
{
	struct meminfo *mi = &meminfo;
	unsigned int left = 0, right = mi->nr_banks;

	do {
		unsigned int mid = (right + left) / 2;
		struct membank *bank = &mi->bank[mid];

		if (pfn < bank_pfn_start(bank))
			right = mid;
		else if (pfn >= bank_pfn_end(bank))
			left = mid + 1;
		else
			return 1;
	} while (left < right);
	return 0;
}
EXPORT_SYMBOL(pfn_valid);
348 349 350 351 352 353 354 355 356 357 358 359 360

static void arm_memory_present(struct meminfo *mi, int node)
{
}
#else
static void arm_memory_present(struct meminfo *mi, int node)
{
	int i;
	for_each_nodebank(i, mi, node) {
		struct membank *bank = &mi->bank[i];
		memory_present(node, bank_pfn_start(bank), bank_pfn_end(bank));
	}
}
361 362
#endif

363
void __init bootmem_init(void)
L
Linus Torvalds 已提交
364
{
365
	struct meminfo *mi = &meminfo;
R
Russell King 已提交
366
	unsigned long min, max_low, max_high;
367
	int node, initrd_node;
L
Linus Torvalds 已提交
368 369

	/*
R
Russell King 已提交
370
	 * Locate which node contains the ramdisk image, if any.
L
Linus Torvalds 已提交
371
	 */
R
Russell King 已提交
372
	initrd_node = check_initrd(mi);
L
Linus Torvalds 已提交
373

R
Russell King 已提交
374 375
	max_low = max_high = 0;

R
Russell King 已提交
376 377 378 379
	/*
	 * Run through each node initialising the bootmem allocator.
	 */
	for_each_node(node) {
R
Russell King 已提交
380 381 382 383 384 385 386 387 388 389 390 391 392 393 394 395 396
		unsigned long node_low, node_high;

		find_node_limits(node, mi, &min, &node_low, &node_high);

		if (node_low > max_low)
			max_low = node_low;
		if (node_high > max_high)
			max_high = node_high;

		/*
		 * If there is no memory in this node, ignore it.
		 * (We can't have nodes which have no lowmem)
		 */
		if (node_low == 0)
			continue;

		bootmem_init_node(node, mi, min, node_low);
L
Linus Torvalds 已提交
397

398 399 400 401 402 403 404 405 406 407 408
		/*
		 * Reserve any special node zero regions.
		 */
		if (node == 0)
			reserve_node_zero(NODE_DATA(node));

		/*
		 * If the initrd is in this node, reserve its memory.
		 */
		if (node == initrd_node)
			bootmem_reserve_initrd(node);
409 410 411 412 413 414

		/*
		 * Sparsemem tries to allocate bootmem in memory_present(),
		 * so must be done after the fixed reservations
		 */
		arm_memory_present(mi, node);
R
Russell King 已提交
415
	}
L
Linus Torvalds 已提交
416

417 418 419 420 421 422 423 424 425 426 427 428 429
	/*
	 * sparse_init() needs the bootmem allocator up and running.
	 */
	sparse_init();

	/*
	 * Now free memory in each node - free_area_init_node needs
	 * the sparse mem_map arrays initialized by sparse_init()
	 * for memmap_init_zone(), otherwise all PFNs are invalid.
	 */
	for_each_node(node)
		bootmem_free_node(node, mi);

R
Russell King 已提交
430
	high_memory = __va((max_low << PAGE_SHIFT) - 1) + 1;
L
Linus Torvalds 已提交
431

R
Russell King 已提交
432 433 434 435 436 437 438 439
	/*
	 * This doesn't seem to be used by the Linux memory manager any
	 * more, but is used by ll_rw_block.  If we can get rid of it, we
	 * also get rid of some of the stuff above as well.
	 *
	 * Note: max_low_pfn and max_pfn reflect the number of _pages_ in
	 * the system, not the maximum PFN.
	 */
R
Russell King 已提交
440 441
	max_low_pfn = max_low - PHYS_PFN_OFFSET;
	max_pfn = max_high - PHYS_PFN_OFFSET;
R
Russell King 已提交
442
}
L
Linus Torvalds 已提交
443

N
Nicolas Pitre 已提交
444
static inline int free_area(unsigned long pfn, unsigned long end, char *s)
L
Linus Torvalds 已提交
445
{
N
Nicolas Pitre 已提交
446
	unsigned int pages = 0, size = (end - pfn) << (PAGE_SHIFT - 10);
L
Linus Torvalds 已提交
447

N
Nicolas Pitre 已提交
448 449
	for (; pfn < end; pfn++) {
		struct page *page = pfn_to_page(pfn);
L
Linus Torvalds 已提交
450
		ClearPageReserved(page);
451
		init_page_count(page);
N
Nicolas Pitre 已提交
452 453
		__free_page(page);
		pages++;
L
Linus Torvalds 已提交
454 455 456 457
	}

	if (size && s)
		printk(KERN_INFO "Freeing %s memory: %dK\n", s, size);
N
Nicolas Pitre 已提交
458 459

	return pages;
L
Linus Torvalds 已提交
460 461
}

462 463 464 465 466 467 468 469 470
static inline void
free_memmap(int node, unsigned long start_pfn, unsigned long end_pfn)
{
	struct page *start_pg, *end_pg;
	unsigned long pg, pgend;

	/*
	 * Convert start_pfn/end_pfn to a struct page pointer.
	 */
471
	start_pg = pfn_to_page(start_pfn - 1) + 1;
472 473 474 475 476 477 478 479 480 481 482 483 484 485 486 487 488 489 490 491 492 493 494 495 496 497 498 499 500 501
	end_pg = pfn_to_page(end_pfn);

	/*
	 * Convert to physical addresses, and
	 * round start upwards and end downwards.
	 */
	pg = PAGE_ALIGN(__pa(start_pg));
	pgend = __pa(end_pg) & PAGE_MASK;

	/*
	 * If there are free pages between these,
	 * free the section of the memmap array.
	 */
	if (pg < pgend)
		free_bootmem_node(NODE_DATA(node), pg, pgend - pg);
}

/*
 * The mem_map array can get very big.  Free the unused area of the memory map.
 */
static void __init free_unused_memmap_node(int node, struct meminfo *mi)
{
	unsigned long bank_start, prev_bank_end = 0;
	unsigned int i;

	/*
	 * [FIXME] This relies on each bank being in address order.  This
	 * may not be the case, especially if the user has provided the
	 * information on the command line.
	 */
R
Russell King 已提交
502
	for_each_nodebank(i, mi, node) {
503 504 505
		struct membank *bank = &mi->bank[i];

		bank_start = bank_pfn_start(bank);
506 507 508 509 510 511 512 513 514 515 516 517 518
		if (bank_start < prev_bank_end) {
			printk(KERN_ERR "MEM: unordered memory banks.  "
				"Not freeing memmap.\n");
			break;
		}

		/*
		 * If we had a previous bank, and there is a space
		 * between the current bank and the previous, free it.
		 */
		if (prev_bank_end && prev_bank_end != bank_start)
			free_memmap(node, prev_bank_end, bank_start);

519
		prev_bank_end = bank_pfn_end(bank);
520 521 522
	}
}

L
Linus Torvalds 已提交
523 524 525 526 527 528 529
/*
 * mem_init() marks the free areas in the mem_map and tells us how much
 * memory is free.  This is done after various parts of the system have
 * claimed their memory after the kernel image.
 */
void __init mem_init(void)
{
530
	unsigned long reserved_pages, free_pages;
L
Linus Torvalds 已提交
531 532 533
	int i, node;

#ifndef CONFIG_DISCONTIGMEM
534
	max_mapnr   = pfn_to_page(max_pfn + PHYS_PFN_OFFSET) - mem_map;
L
Linus Torvalds 已提交
535 536 537 538 539 540
#endif

	/* this will put all unused low memory onto the freelists */
	for_each_online_node(node) {
		pg_data_t *pgdat = NODE_DATA(node);

541 542
		free_unused_memmap_node(node, &meminfo);

L
Linus Torvalds 已提交
543 544 545 546 547 548
		if (pgdat->node_spanned_pages != 0)
			totalram_pages += free_all_bootmem_node(pgdat);
	}

#ifdef CONFIG_SA1111
	/* now that our DMA memory is actually so designated, we can free it */
N
Nicolas Pitre 已提交
549 550
	totalram_pages += free_area(PHYS_PFN_OFFSET,
				    __phys_to_pfn(__pa(swapper_pg_dir)), NULL);
L
Linus Torvalds 已提交
551 552
#endif

553 554 555 556 557 558 559 560 561 562 563 564 565
#ifdef CONFIG_HIGHMEM
	/* set highmem page free */
	for_each_online_node(node) {
		for_each_nodebank (i, &meminfo, node) {
			unsigned long start = bank_pfn_start(&meminfo.bank[i]);
			unsigned long end = bank_pfn_end(&meminfo.bank[i]);
			if (start >= max_low_pfn + PHYS_PFN_OFFSET)
				totalhigh_pages += free_area(start, end, NULL);
		}
	}
	totalram_pages += totalhigh_pages;
#endif

566 567 568 569 570 571 572 573 574 575 576
	reserved_pages = free_pages = 0;

	for_each_online_node(node) {
		for_each_nodebank(i, &meminfo, node) {
			struct membank *bank = &meminfo.bank[i];
			unsigned int pfn1, pfn2;
			struct page *page, *end;

			pfn1 = bank_pfn_start(bank);
			pfn2 = bank_pfn_end(bank);

577 578
			page = pfn_to_page(pfn1);
			end  = pfn_to_page(pfn2 - 1) + 1;
579 580 581 582 583 584 585 586 587 588 589

			do {
				if (PageReserved(page))
					reserved_pages++;
				else if (!page_count(page))
					free_pages++;
				page++;
			} while (page < end);
		}
	}

L
Linus Torvalds 已提交
590 591 592 593 594 595 596
	/*
	 * Since our memory may not be contiguous, calculate the
	 * real number of pages we have in this system
	 */
	printk(KERN_INFO "Memory:");
	num_physpages = 0;
	for (i = 0; i < meminfo.nr_banks; i++) {
597 598
		num_physpages += bank_pfn_size(&meminfo.bank[i]);
		printk(" %ldMB", bank_phys_size(&meminfo.bank[i]) >> 20);
L
Linus Torvalds 已提交
599 600
	}
	printk(" = %luMB total\n", num_physpages >> (20 - PAGE_SHIFT));
N
Nicolas Pitre 已提交
601

602 603 604 605
	printk(KERN_NOTICE "Memory: %luk/%luk available, %luk reserved, %luK highmem\n",
		nr_free_pages() << (PAGE_SHIFT-10),
		free_pages << (PAGE_SHIFT-10),
		reserved_pages << (PAGE_SHIFT-10),
606
		totalhigh_pages << (PAGE_SHIFT-10));
L
Linus Torvalds 已提交
607

608 609 610 611 612 613 614
#define MLK(b, t) b, t, ((t) - (b)) >> 10
#define MLM(b, t) b, t, ((t) - (b)) >> 20
#define MLK_ROUNDUP(b, t) b, t, DIV_ROUND_UP(((t) - (b)), SZ_1K)

	printk(KERN_NOTICE "Virtual kernel memory layout:\n"
			"    vector  : 0x%08lx - 0x%08lx   (%4ld kB)\n"
			"    fixmap  : 0x%08lx - 0x%08lx   (%4ld kB)\n"
615 616 617
#ifdef CONFIG_MMU
			"    DMA     : 0x%08lx - 0x%08lx   (%4ld MB)\n"
#endif
618 619 620 621 622 623 624 625 626 627 628 629 630
			"    vmalloc : 0x%08lx - 0x%08lx   (%4ld MB)\n"
			"    lowmem  : 0x%08lx - 0x%08lx   (%4ld MB)\n"
#ifdef CONFIG_HIGHMEM
			"    pkmap   : 0x%08lx - 0x%08lx   (%4ld MB)\n"
#endif
			"    modules : 0x%08lx - 0x%08lx   (%4ld MB)\n"
			"      .init : 0x%p" " - 0x%p" "   (%4d kB)\n"
			"      .text : 0x%p" " - 0x%p" "   (%4d kB)\n"
			"      .data : 0x%p" " - 0x%p" "   (%4d kB)\n",

			MLK(UL(CONFIG_VECTORS_BASE), UL(CONFIG_VECTORS_BASE) +
				(PAGE_SIZE)),
			MLK(FIXADDR_START, FIXADDR_TOP),
631 632 633
#ifdef CONFIG_MMU
			MLM(CONSISTENT_BASE, CONSISTENT_END),
#endif
634
			MLM(VMALLOC_START, VMALLOC_END),
635 636 637 638 639 640 641 642 643 644 645 646 647 648 649
			MLM(PAGE_OFFSET, (unsigned long)high_memory),
#ifdef CONFIG_HIGHMEM
			MLM(PKMAP_BASE, (PKMAP_BASE) + (LAST_PKMAP) *
				(PAGE_SIZE)),
#endif
			MLM(MODULES_VADDR, MODULES_END),

			MLK_ROUNDUP(__init_begin, __init_end),
			MLK_ROUNDUP(_text, _etext),
			MLK_ROUNDUP(_data, _edata));

#undef MLK
#undef MLM
#undef MLK_ROUNDUP

650 651 652 653 654 655 656 657 658 659 660 661 662 663 664 665 666
	/*
	 * Check boundaries twice: Some fundamental inconsistencies can
	 * be detected at build time already.
	 */
#ifdef CONFIG_MMU
	BUILD_BUG_ON(VMALLOC_END			> CONSISTENT_BASE);
	BUG_ON(VMALLOC_END				> CONSISTENT_BASE);

	BUILD_BUG_ON(TASK_SIZE				> MODULES_VADDR);
	BUG_ON(TASK_SIZE 				> MODULES_VADDR);
#endif

#ifdef CONFIG_HIGHMEM
	BUILD_BUG_ON(PKMAP_BASE + LAST_PKMAP * PAGE_SIZE > PAGE_OFFSET);
	BUG_ON(PKMAP_BASE + LAST_PKMAP * PAGE_SIZE	> PAGE_OFFSET);
#endif

L
Linus Torvalds 已提交
667 668 669 670 671 672 673 674 675 676 677 678 679
	if (PAGE_SIZE >= 16384 && num_physpages <= 128) {
		extern int sysctl_overcommit_memory;
		/*
		 * On a machine this small we won't get
		 * anywhere without overcommit, so turn
		 * it on by default.
		 */
		sysctl_overcommit_memory = OVERCOMMIT_ALWAYS;
	}
}

void free_initmem(void)
{
680
#ifdef CONFIG_HAVE_TCM
681
	extern char __tcm_start, __tcm_end;
682

683 684
	totalram_pages += free_area(__phys_to_pfn(__pa(&__tcm_start)),
				    __phys_to_pfn(__pa(&__tcm_end)),
685 686 687
				    "TCM link");
#endif

N
Nicolas Pitre 已提交
688
	if (!machine_is_integrator() && !machine_is_cintegrator())
R
Russell King 已提交
689 690
		totalram_pages += free_area(__phys_to_pfn(__pa(__init_begin)),
					    __phys_to_pfn(__pa(__init_end)),
N
Nicolas Pitre 已提交
691
					    "init");
L
Linus Torvalds 已提交
692 693 694 695 696 697 698 699 700
}

#ifdef CONFIG_BLK_DEV_INITRD

static int keep_initrd;

void free_initrd_mem(unsigned long start, unsigned long end)
{
	if (!keep_initrd)
N
Nicolas Pitre 已提交
701 702 703
		totalram_pages += free_area(__phys_to_pfn(__pa(start)),
					    __phys_to_pfn(__pa(end)),
					    "initrd");
L
Linus Torvalds 已提交
704 705 706 707 708 709 710 711 712 713
}

static int __init keepinitrd_setup(char *__unused)
{
	keep_initrd = 1;
	return 1;
}

__setup("keepinitrd", keepinitrd_setup);
#endif