arch/arm/mm/init.c

   1 /*
   2  *  linux/arch/arm/mm/init.c
   3  *
   4  *  Copyright (C) 1995-2005 Russell King
   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  */
  10 #include <linux/kernel.h>
  11 #include <linux/errno.h>
  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>
  18 #include <linux/of_fdt.h>
  19 #include <linux/highmem.h>
  20 #include <linux/gfp.h>
  21 #include <linux/memblock.h>
  22 #include <linux/sort.h>
  23
  24 #include <asm/mach-types.h>
  25 #include <asm/prom.h>
  26 #include <asm/sections.h>
  27 #include <asm/setup.h>
  28 #include <asm/sizes.h>
  29 #include <asm/tlb.h>
  30 #include <asm/fixmap.h>
  31 #include <asm/memory.h>
  32
  33 #include <asm/mach/arch.h>
  34 #include <asm/mach/map.h>
  35
  36 #include "mm.h"
  37
  38 static unsigned long phys_initrd_start __initdata = 0;
  39 static unsigned long phys_initrd_size __initdata = 0;
  40
  41 static int __init early_initrd(char *p)
  42 {
  43         unsigned long start, size;
  44         char *endp;
  45
  46         start = memparse(p, &endp);
  47         if (*endp == ',') {
  48                 size = memparse(endp + 1, NULL);
  49
  50                 phys_initrd_start = start;
  51                 phys_initrd_size = size;
  52         }
  53         return 0;
  54 }
  55 early_param("initrd", early_initrd);
  56
  57 static int __init parse_tag_initrd(const struct tag *tag)
  58 {
  59         printk(KERN_WARNING "ATAG_INITRD is deprecated; "
  60                 "please update your bootloader.\n");
  61         phys_initrd_start = __virt_to_phys(tag->u.initrd.start);
  62         phys_initrd_size = tag->u.initrd.size;
  63         return 0;
  64 }
  65
  66 __tagtable(ATAG_INITRD, parse_tag_initrd);
  67
  68 static int __init parse_tag_initrd2(const struct tag *tag)
  69 {
  70         phys_initrd_start = tag->u.initrd.start;
  71         phys_initrd_size = tag->u.initrd.size;
  72         return 0;
  73 }
  74
  75 __tagtable(ATAG_INITRD2, parse_tag_initrd2);
  76
  77 #ifdef CONFIG_OF_FLATTREE
  78 void __init early_init_dt_setup_initrd_arch(unsigned long start, unsigned long end)
  79 {
  80         phys_initrd_start = start;
  81         phys_initrd_size = end - start;
  82 }
  83 #endif /* CONFIG_OF_FLATTREE */
  84
  85 /*
  86  * This keeps memory configuration data used by a couple memory
  87  * initialization functions, as well as show_mem() for the skipping
  88  * of holes in the memory map.  It is populated by arm_add_memory().
  89  */
  90 struct meminfo meminfo;
  91
  92 void show_mem(unsigned int filter)
  93 {
  94         int free = 0, total = 0, reserved = 0;
  95         int shared = 0, cached = 0, slab = 0, i;
  96         struct meminfo * mi = &meminfo;
  97
  98         printk("Mem-info:\n");
  99         show_free_areas(filter);
 100
 101         for_each_bank (i, mi) {
 102                 struct membank *bank = &mi->bank[i];
 103                 unsigned int pfn1, pfn2;
 104                 struct page *page, *end;
 105
 106                 pfn1 = bank_pfn_start(bank);
 107                 pfn2 = bank_pfn_end(bank);
 108
 109                 page = pfn_to_page(pfn1);
 110                 end  = pfn_to_page(pfn2 - 1) + 1;
 111
 112                 do {
 113                         total++;
 114                         if (PageReserved(page))
 115                                 reserved++;
 116                         else if (PageSwapCache(page))
 117                                 cached++;
 118                         else if (PageSlab(page))
 119                                 slab++;
 120                         else if (!page_count(page))
 121                                 free++;
 122                         else
 123                                 shared += page_count(page) - 1;
 124                         page++;
 125                 } while (page < end);
 126         }
 127
 128         printk("%d pages of RAM\n", total);
 129         printk("%d free pages\n", free);
 130         printk("%d reserved pages\n", reserved);
 131         printk("%d slab pages\n", slab);
 132         printk("%d pages shared\n", shared);
 133         printk("%d pages swap cached\n", cached);
 134 }
 135
 136 static void __init find_limits(unsigned long *min, unsigned long *max_low,
 137         unsigned long *max_high)
 138 {
 139         struct meminfo *mi = &meminfo;
 140         int i;
 141
 142         *min = -1UL;
 143         *max_low = *max_high = 0;
 144
 145         for_each_bank (i, mi) {
 146                 struct membank *bank = &mi->bank[i];
 147                 unsigned long start, end;
 148
 149                 start = bank_pfn_start(bank);
 150                 end = bank_pfn_end(bank);
 151
 152                 if (*min > start)
 153                         *min = start;
 154                 if (*max_high < end)
 155                         *max_high = end;
 156                 if (bank->highmem)
 157                         continue;
 158                 if (*max_low < end)
 159                         *max_low = end;
 160         }
 161 }
 162
 163 static void __init arm_bootmem_init(unsigned long start_pfn,
 164         unsigned long end_pfn)
 165 {
 166         struct memblock_region *reg;
 167         unsigned int boot_pages;
 168         phys_addr_t bitmap;
 169         pg_data_t *pgdat;
 170
 171         /*
 172          * Allocate the bootmem bitmap page.  This must be in a region
 173          * of memory which has already been mapped.
 174          */
 175         boot_pages = bootmem_bootmap_pages(end_pfn - start_pfn);
 176         bitmap = memblock_alloc_base(boot_pages << PAGE_SHIFT, L1_CACHE_BYTES,
 177                                 __pfn_to_phys(end_pfn));
 178
 179         /*
 180          * Initialise the bootmem allocator, handing the
 181          * memory banks over to bootmem.
 182          */
 183         node_set_online(0);
 184         pgdat = NODE_DATA(0);
 185         init_bootmem_node(pgdat, __phys_to_pfn(bitmap), start_pfn, end_pfn);
 186
 187         /* Free the lowmem regions from memblock into bootmem. */
 188         for_each_memblock(memory, reg) {
 189                 unsigned long start = memblock_region_memory_base_pfn(reg);
 190                 unsigned long end = memblock_region_memory_end_pfn(reg);
 191
 192                 if (end >= end_pfn)
 193                         end = end_pfn;
 194                 if (start >= end)
 195                         break;
 196
 197                 free_bootmem(__pfn_to_phys(start), (end - start) << PAGE_SHIFT);
 198         }
 199
 200         /* Reserve the lowmem memblock reserved regions in bootmem. */
 201         for_each_memblock(reserved, reg) {
 202                 unsigned long start = memblock_region_reserved_base_pfn(reg);
 203                 unsigned long end = memblock_region_reserved_end_pfn(reg);
 204
 205                 if (end >= end_pfn)
 206                         end = end_pfn;
 207                 if (start >= end)
 208                         break;
 209
 210                 reserve_bootmem(__pfn_to_phys(start),
 211                                 (end - start) << PAGE_SHIFT, BOOTMEM_DEFAULT);
 212         }
 213 }
 214
 215 #ifdef CONFIG_ZONE_DMA
 216
 217 #ifdef ARM_DMA_ZONE_SIZE
 218 unsigned long arm_dma_zone_size = ARM_DMA_ZONE_SIZE;
 219 #else
 220 unsigned long arm_dma_zone_size __read_mostly;
 221 #endif
 222 EXPORT_SYMBOL(arm_dma_zone_size);
 223
 224 /*
 225  * The DMA mask corresponding to the maximum bus address allocatable
 226  * using GFP_DMA.  The default here places no restriction on DMA
 227  * allocations.  This must be the smallest DMA mask in the system,
 228  * so a successful GFP_DMA allocation will always satisfy this.
 229  */
 230 u32 arm_dma_limit;
 231
 232 static void __init arm_adjust_dma_zone(unsigned long *size, unsigned long *hole,
 233         unsigned long dma_size)
 234 {
 235         if (size[0] <= dma_size)
 236                 return;
 237
 238         size[ZONE_NORMAL] = size[0] - dma_size;
 239         size[ZONE_DMA] = dma_size;
 240         hole[ZONE_NORMAL] = hole[0];
 241         hole[ZONE_DMA] = 0;
 242 }
 243 #endif
 244
 245 static void __init arm_bootmem_free(unsigned long min, unsigned long max_low,
 246         unsigned long max_high)
 247 {
 248         unsigned long zone_size[MAX_NR_ZONES], zhole_size[MAX_NR_ZONES];
 249         struct memblock_region *reg;
 250
 251         /*
 252          * initialise the zones.
 253          */
 254         memset(zone_size, 0, sizeof(zone_size));
 255
 256         /*
 257          * The memory size has already been determined.  If we need
 258          * to do anything fancy with the allocation of this memory
 259          * to the zones, now is the time to do it.
 260          */
 261         zone_size[0] = max_low - min;
 262 #ifdef CONFIG_HIGHMEM
 263         zone_size[ZONE_HIGHMEM] = max_high - max_low;
 264 #endif
 265
 266         /*
 267          * Calculate the size of the holes.
 268          *  holes = node_size - sum(bank_sizes)
 269          */
 270         memcpy(zhole_size, zone_size, sizeof(zhole_size));
 271         for_each_memblock(memory, reg) {
 272                 unsigned long start = memblock_region_memory_base_pfn(reg);
 273                 unsigned long end = memblock_region_memory_end_pfn(reg);
 274
 275                 if (start < max_low) {
 276                         unsigned long low_end = min(end, max_low);
 277                         zhole_size[0] -= low_end - start;
 278                 }
 279 #ifdef CONFIG_HIGHMEM
 280                 if (end > max_low) {
 281                         unsigned long high_start = max(start, max_low);
 282                         zhole_size[ZONE_HIGHMEM] -= end - high_start;
 283                 }
 284 #endif
 285         }
 286
 287 #ifdef CONFIG_ZONE_DMA
 288         /*
 289          * Adjust the sizes according to any special requirements for
 290          * this machine type.
 291          */
 292         if (arm_dma_zone_size) {
 293                 arm_adjust_dma_zone(zone_size, zhole_size,
 294                         arm_dma_zone_size >> PAGE_SHIFT);
 295                 arm_dma_limit = PHYS_OFFSET + arm_dma_zone_size - 1;
 296         } else
 297                 arm_dma_limit = 0xffffffff;
 298 #endif
 299
 300         free_area_init_node(0, zone_size, min, zhole_size);
 301 }
 302
 303 #ifdef CONFIG_HAVE_ARCH_PFN_VALID
 304 int pfn_valid(unsigned long pfn)
 305 {
 306         return memblock_is_memory(pfn << PAGE_SHIFT);
 307 }
 308 EXPORT_SYMBOL(pfn_valid);
 309 #endif
 310
 311 #ifndef CONFIG_SPARSEMEM
 312 static void arm_memory_present(void)
 313 {
 314 }
 315 #else
 316 static void arm_memory_present(void)
 317 {
 318         struct memblock_region *reg;
 319
 320         for_each_memblock(memory, reg)
 321                 memory_present(0, memblock_region_memory_base_pfn(reg),
 322                                memblock_region_memory_end_pfn(reg));
 323 }
 324 #endif
 325
 326 static int __init meminfo_cmp(const void *_a, const void *_b)
 327 {
 328         const struct membank *a = _a, *b = _b;
 329         long cmp = bank_pfn_start(a) - bank_pfn_start(b);
 330         return cmp < 0 ? -1 : cmp > 0 ? 1 : 0;
 331 }
 332
 333 void __init arm_memblock_init(struct meminfo *mi, struct machine_desc *mdesc)
 334 {
 335         int i;
 336
 337         sort(&meminfo.bank, meminfo.nr_banks, sizeof(meminfo.bank[0]), meminfo_cmp, NULL);
 338
 339         memblock_init();
 340         for (i = 0; i < mi->nr_banks; i++)
 341                 memblock_add(mi->bank[i].start, mi->bank[i].size);
 342
 343         /* Register the kernel text, kernel data and initrd with memblock. */
 344 #ifdef CONFIG_XIP_KERNEL
 345         memblock_reserve(__pa(_sdata), _end - _sdata);
 346 #else
 347         memblock_reserve(__pa(_stext), _end - _stext);
 348 #endif
 349 #ifdef CONFIG_BLK_DEV_INITRD
 350         if (phys_initrd_size &&
 351             !memblock_is_region_memory(phys_initrd_start, phys_initrd_size)) {
 352                 pr_err("INITRD: 0x%08lx+0x%08lx is not a memory region - disabling initrd\n",
 353                        phys_initrd_start, phys_initrd_size);
 354                 phys_initrd_start = phys_initrd_size = 0;
 355         }
 356         if (phys_initrd_size &&
 357             memblock_is_region_reserved(phys_initrd_start, phys_initrd_size)) {
 358                 pr_err("INITRD: 0x%08lx+0x%08lx overlaps in-use memory region - disabling initrd\n",
 359                        phys_initrd_start, phys_initrd_size);
 360                 phys_initrd_start = phys_initrd_size = 0;
 361         }
 362         if (phys_initrd_size) {
 363                 memblock_reserve(phys_initrd_start, phys_initrd_size);
 364
 365                 /* Now convert initrd to virtual addresses */
 366                 initrd_start = __phys_to_virt(phys_initrd_start);
 367                 initrd_end = initrd_start + phys_initrd_size;
 368         }
 369 #endif
 370
 371         arm_mm_memblock_reserve();
 372         arm_dt_memblock_reserve();
 373
 374         /* reserve any platform specific memblock areas */
 375         if (mdesc->reserve)
 376                 mdesc->reserve();
 377
 378         memblock_analyze();
 379         memblock_dump_all();
 380 }
 381
 382 void __init bootmem_init(void)
 383 {
 384         unsigned long min, max_low, max_high;
 385
 386         max_low = max_high = 0;
 387
 388         find_limits(&min, &max_low, &max_high);
 389
 390         arm_bootmem_init(min, max_low);
 391
 392         /*
 393          * Sparsemem tries to allocate bootmem in memory_present(),
 394          * so must be done after the fixed reservations
 395          */
 396         arm_memory_present();
 397
 398         /*
 399          * sparse_init() needs the bootmem allocator up and running.
 400          */
 401         sparse_init();
 402
 403         /*
 404          * Now free the memory - free_area_init_node needs
 405          * the sparse mem_map arrays initialized by sparse_init()
 406          * for memmap_init_zone(), otherwise all PFNs are invalid.
 407          */
 408         arm_bootmem_free(min, max_low, max_high);
 409
 410         high_memory = __va(((phys_addr_t)max_low << PAGE_SHIFT) - 1) + 1;
 411
 412         /*
 413          * This doesn't seem to be used by the Linux memory manager any
 414          * more, but is used by ll_rw_block.  If we can get rid of it, we
 415          * also get rid of some of the stuff above as well.
 416          *
 417          * Note: max_low_pfn and max_pfn reflect the number of _pages_ in
 418          * the system, not the maximum PFN.
 419          */
 420         max_low_pfn = max_low - PHYS_PFN_OFFSET;
 421         max_pfn = max_high - PHYS_PFN_OFFSET;
 422 }
 423
 424 static inline int free_area(unsigned long pfn, unsigned long end, char *s)
 425 {
 426         unsigned int pages = 0, size = (end - pfn) << (PAGE_SHIFT - 10);
 427
 428         for (; pfn < end; pfn++) {
 429                 struct page *page = pfn_to_page(pfn);
 430                 ClearPageReserved(page);
 431                 init_page_count(page);
 432                 __free_page(page);
 433                 pages++;
 434         }
 435
 436         if (size && s)
 437                 printk(KERN_INFO "Freeing %s memory: %dK\n", s, size);
 438
 439         return pages;
 440 }
 441
 442 static inline void
 443 free_memmap(unsigned long start_pfn, unsigned long end_pfn)
 444 {
 445         struct page *start_pg, *end_pg;
 446         unsigned long pg, pgend;
 447
 448         /*
 449          * Convert start_pfn/end_pfn to a struct page pointer.
 450          */
 451         start_pg = pfn_to_page(start_pfn - 1) + 1;
 452         end_pg = pfn_to_page(end_pfn - 1) + 1;
 453
 454         /*
 455          * Convert to physical addresses, and
 456          * round start upwards and end downwards.
 457          */
 458         pg = (unsigned long)PAGE_ALIGN(__pa(start_pg));
 459         pgend = (unsigned long)__pa(end_pg) & PAGE_MASK;
 460
 461         /*
 462          * If there are free pages between these,
 463          * free the section of the memmap array.
 464          */
 465         if (pg < pgend)
 466                 free_bootmem(pg, pgend - pg);
 467 }
 468
 469 /*
 470  * The mem_map array can get very big.  Free the unused area of the memory map.
 471  */
 472 static void __init free_unused_memmap(struct meminfo *mi)
 473 {
 474         unsigned long bank_start, prev_bank_end = 0;
 475         unsigned int i;
 476
 477         /*
 478          * This relies on each bank being in address order.
 479          * The banks are sorted previously in bootmem_init().
 480          */
 481         for_each_bank(i, mi) {
 482                 struct membank *bank = &mi->bank[i];
 483
 484                 bank_start = bank_pfn_start(bank);
 485
 486 #ifdef CONFIG_SPARSEMEM
 487                 /*
 488                  * Take care not to free memmap entries that don't exist
 489                  * due to SPARSEMEM sections which aren't present.
 490                  */
 491                 bank_start = min(bank_start,
 492                                  ALIGN(prev_bank_end, PAGES_PER_SECTION));
 493 #endif
 494                 /*
 495                  * If we had a previous bank, and there is a space
 496                  * between the current bank and the previous, free it.
 497                  */
 498                 if (prev_bank_end && prev_bank_end < bank_start)
 499                         free_memmap(prev_bank_end, bank_start);
 500
 501                 /*
 502                  * Align up here since the VM subsystem insists that the
 503                  * memmap entries are valid from the bank end aligned to
 504                  * MAX_ORDER_NR_PAGES.
 505                  */
 506                 prev_bank_end = ALIGN(bank_pfn_end(bank), MAX_ORDER_NR_PAGES);
 507         }
 508
 509 #ifdef CONFIG_SPARSEMEM
 510         if (!IS_ALIGNED(prev_bank_end, PAGES_PER_SECTION))
 511                 free_memmap(prev_bank_end,
 512                             ALIGN(prev_bank_end, PAGES_PER_SECTION));
 513 #endif
 514 }
 515
 516 static void __init free_highpages(void)
 517 {
 518 #ifdef CONFIG_HIGHMEM
 519         unsigned long max_low = max_low_pfn + PHYS_PFN_OFFSET;
 520         struct memblock_region *mem, *res;
 521
 522         /* set highmem page free */
 523         for_each_memblock(memory, mem) {
 524                 unsigned long start = memblock_region_memory_base_pfn(mem);
 525                 unsigned long end = memblock_region_memory_end_pfn(mem);
 526
 527                 /* Ignore complete lowmem entries */
 528                 if (end <= max_low)
 529                         continue;
 530
 531                 /* Truncate partial highmem entries */
 532                 if (start < max_low)
 533                         start = max_low;
 534
 535                 /* Find and exclude any reserved regions */
 536                 for_each_memblock(reserved, res) {
 537                         unsigned long res_start, res_end;
 538
 539                         res_start = memblock_region_reserved_base_pfn(res);
 540                         res_end = memblock_region_reserved_end_pfn(res);
 541
 542                         if (res_end < start)
 543                                 continue;
 544                         if (res_start < start)
 545                                 res_start = start;
 546                         if (res_start > end)
 547                                 res_start = end;
 548                         if (res_end > end)
 549                                 res_end = end;
 550                         if (res_start != start)
 551                                 totalhigh_pages += free_area(start, res_start,
 552                                                              NULL);
 553                         start = res_end;
 554                         if (start == end)
 555                                 break;
 556                 }
 557
 558                 /* And now free anything which remains */
 559                 if (start < end)
 560                         totalhigh_pages += free_area(start, end, NULL);
 561         }
 562         totalram_pages += totalhigh_pages;
 563 #endif
 564 }
 565
 566 /*
 567  * mem_init() marks the free areas in the mem_map and tells us how much
 568  * memory is free.  This is done after various parts of the system have
 569  * claimed their memory after the kernel image.
 570  */
 571 void __init mem_init(void)
 572 {
 573         unsigned long reserved_pages, free_pages;
 574         struct memblock_region *reg;
 575         int i;
 576 #ifdef CONFIG_HAVE_TCM
 577         /* These pointers are filled in on TCM detection */
 578         extern u32 dtcm_end;
 579         extern u32 itcm_end;
 580 #endif
 581
 582         max_mapnr   = pfn_to_page(max_pfn + PHYS_PFN_OFFSET) - mem_map;
 583
 584         /* this will put all unused low memory onto the freelists */
 585         free_unused_memmap(&meminfo);
 586
 587         totalram_pages += free_all_bootmem();
 588
 589 #ifdef CONFIG_SA1111
 590         /* now that our DMA memory is actually so designated, we can free it */
 591         totalram_pages += free_area(PHYS_PFN_OFFSET,
 592                                     __phys_to_pfn(__pa(swapper_pg_dir)), NULL);
 593 #endif
 594
 595         free_highpages();
 596
 597         reserved_pages = free_pages = 0;
 598
 599         for_each_bank(i, &meminfo) {
 600                 struct membank *bank = &meminfo.bank[i];
 601                 unsigned int pfn1, pfn2;
 602                 struct page *page, *end;
 603
 604                 pfn1 = bank_pfn_start(bank);
 605                 pfn2 = bank_pfn_end(bank);
 606
 607                 page = pfn_to_page(pfn1);
 608                 end  = pfn_to_page(pfn2 - 1) + 1;
 609
 610                 do {
 611                         if (PageReserved(page))
 612                                 reserved_pages++;
 613                         else if (!page_count(page))
 614                                 free_pages++;
 615                         page++;
 616                 } while (page < end);
 617         }
 618
 619         /*
 620          * Since our memory may not be contiguous, calculate the
 621          * real number of pages we have in this system
 622          */
 623         printk(KERN_INFO "Memory:");
 624         num_physpages = 0;
 625         for_each_memblock(memory, reg) {
 626                 unsigned long pages = memblock_region_memory_end_pfn(reg) -
 627                         memblock_region_memory_base_pfn(reg);
 628                 num_physpages += pages;
 629                 printk(" %ldMB", pages >> (20 - PAGE_SHIFT));
 630         }
 631         printk(" = %luMB total\n", num_physpages >> (20 - PAGE_SHIFT));
 632
 633         printk(KERN_NOTICE "Memory: %luk/%luk available, %luk reserved, %luK highmem\n",
 634                 nr_free_pages() << (PAGE_SHIFT-10),
 635                 free_pages << (PAGE_SHIFT-10),
 636                 reserved_pages << (PAGE_SHIFT-10),
 637                 totalhigh_pages << (PAGE_SHIFT-10));
 638
 639 #define MLK(b, t) b, t, ((t) - (b)) >> 10
 640 #define MLM(b, t) b, t, ((t) - (b)) >> 20
 641 #define MLK_ROUNDUP(b, t) b, t, DIV_ROUND_UP(((t) - (b)), SZ_1K)
 642
 643         printk(KERN_NOTICE "Virtual kernel memory layout:\n"
 644                         "    vector  : 0x%08lx - 0x%08lx   (%4ld kB)\n"
 645 #ifdef CONFIG_HAVE_TCM
 646                         "    DTCM    : 0x%08lx - 0x%08lx   (%4ld kB)\n"
 647                         "    ITCM    : 0x%08lx - 0x%08lx   (%4ld kB)\n"
 648 #endif
 649                         "    fixmap  : 0x%08lx - 0x%08lx   (%4ld kB)\n"
 650 #ifdef CONFIG_MMU
 651                         "    DMA     : 0x%08lx - 0x%08lx   (%4ld MB)\n"
 652 #endif
 653                         "    vmalloc : 0x%08lx - 0x%08lx   (%4ld MB)\n"
 654                         "    lowmem  : 0x%08lx - 0x%08lx   (%4ld MB)\n"
 655 #ifdef CONFIG_HIGHMEM
 656                         "    pkmap   : 0x%08lx - 0x%08lx   (%4ld MB)\n"
 657 #endif
 658                         "    modules : 0x%08lx - 0x%08lx   (%4ld MB)\n"
 659                         "      .init : 0x%p" " - 0x%p" "   (%4d kB)\n"
 660                         "      .text : 0x%p" " - 0x%p" "   (%4d kB)\n"
 661                         "      .data : 0x%p" " - 0x%p" "   (%4d kB)\n"
 662                         "       .bss : 0x%p" " - 0x%p" "   (%4d kB)\n",
 663
 664                         MLK(UL(CONFIG_VECTORS_BASE), UL(CONFIG_VECTORS_BASE) +
 665                                 (PAGE_SIZE)),
 666 #ifdef CONFIG_HAVE_TCM
 667                         MLK(DTCM_OFFSET, (unsigned long) dtcm_end),
 668                         MLK(ITCM_OFFSET, (unsigned long) itcm_end),
 669 #endif
 670                         MLK(FIXADDR_START, FIXADDR_TOP),
 671 #ifdef CONFIG_MMU
 672                         MLM(CONSISTENT_BASE, CONSISTENT_END),
 673 #endif
 674                         MLM(VMALLOC_START, VMALLOC_END),
 675                         MLM(PAGE_OFFSET, (unsigned long)high_memory),
 676 #ifdef CONFIG_HIGHMEM
 677                         MLM(PKMAP_BASE, (PKMAP_BASE) + (LAST_PKMAP) *
 678                                 (PAGE_SIZE)),
 679 #endif
 680                         MLM(MODULES_VADDR, MODULES_END),
 681
 682                         MLK_ROUNDUP(__init_begin, __init_end),
 683                         MLK_ROUNDUP(_text, _etext),
 684                         MLK_ROUNDUP(_sdata, _edata),
 685                         MLK_ROUNDUP(__bss_start, __bss_stop));
 686
 687 #undef MLK
 688 #undef MLM
 689 #undef MLK_ROUNDUP
 690
 691         /*
 692          * Check boundaries twice: Some fundamental inconsistencies can
 693          * be detected at build time already.
 694          */
 695 #ifdef CONFIG_MMU
 696         BUILD_BUG_ON(VMALLOC_END                        > CONSISTENT_BASE);
 697         BUG_ON(VMALLOC_END                              > CONSISTENT_BASE);
 698
 699         BUILD_BUG_ON(TASK_SIZE                          > MODULES_VADDR);
 700         BUG_ON(TASK_SIZE                                > MODULES_VADDR);
 701 #endif
 702
 703 #ifdef CONFIG_HIGHMEM
 704         BUILD_BUG_ON(PKMAP_BASE + LAST_PKMAP * PAGE_SIZE > PAGE_OFFSET);
 705         BUG_ON(PKMAP_BASE + LAST_PKMAP * PAGE_SIZE      > PAGE_OFFSET);
 706 #endif
 707
 708         if (PAGE_SIZE >= 16384 && num_physpages <= 128) {
 709                 extern int sysctl_overcommit_memory;
 710                 /*
 711                  * On a machine this small we won't get
 712                  * anywhere without overcommit, so turn
 713                  * it on by default.
 714                  */
 715                 sysctl_overcommit_memory = OVERCOMMIT_ALWAYS;
 716         }
 717 }
 718
 719 void free_initmem(void)
 720 {
 721 #ifdef CONFIG_HAVE_TCM
 722         extern char __tcm_start, __tcm_end;
 723
 724         totalram_pages += free_area(__phys_to_pfn(__pa(&__tcm_start)),
 725                                     __phys_to_pfn(__pa(&__tcm_end)),
 726                                     "TCM link");
 727 #endif
 728
 729         if (!machine_is_integrator() && !machine_is_cintegrator())
 730                 totalram_pages += free_area(__phys_to_pfn(__pa(__init_begin)),
 731                                             __phys_to_pfn(__pa(__init_end)),
 732                                             "init");
 733 }
 734
 735 #ifdef CONFIG_BLK_DEV_INITRD
 736
 737 static int keep_initrd;
 738
 739 void free_initrd_mem(unsigned long start, unsigned long end)
 740 {
 741         if (!keep_initrd)
 742                 totalram_pages += free_area(__phys_to_pfn(__pa(start)),
 743                                             __phys_to_pfn(__pa(end)),
 744                                             "initrd");
 745 }
 746
 747 static int __init keepinitrd_setup(char *__unused)
 748 {
 749         keep_initrd = 1;
 750         return 1;
 751 }
 752
 753 __setup("keepinitrd", keepinitrd_setup);
 754 #endif