Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1 | /* |
| 2 | * linux/arch/arm/mm/init.c |
| 3 | * |
Russell King | 9007205 | 2005-10-28 14:48:37 +0100 | [diff] [blame] | 4 | * Copyright (C) 1995-2005 Russell King |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 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 | */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 10 | #include <linux/kernel.h> |
| 11 | #include <linux/errno.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 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> |
Nicolas Pitre | 3835f6c | 2008-09-17 15:21:55 -0400 | [diff] [blame] | 18 | #include <linux/highmem.h> |
Tejun Heo | 5a0e3ad | 2010-03-24 17:04:11 +0900 | [diff] [blame] | 19 | #include <linux/gfp.h> |
Russell King | 2778f62 | 2010-07-09 16:27:52 +0100 | [diff] [blame] | 20 | #include <linux/memblock.h> |
Russell King | 7dc50ec | 2010-10-27 18:14:56 +0100 | [diff] [blame] | 21 | #include <linux/sort.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 22 | |
| 23 | #include <asm/mach-types.h> |
Russell King | 37efe64 | 2008-12-01 11:53:07 +0000 | [diff] [blame] | 24 | #include <asm/sections.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 25 | #include <asm/setup.h> |
Russell King | 74d02fb | 2006-04-04 21:47:43 +0100 | [diff] [blame] | 26 | #include <asm/sizes.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 27 | #include <asm/tlb.h> |
Fenkart/Bostandzhyan | db9ef1a | 2010-02-07 21:45:47 +0100 | [diff] [blame] | 28 | #include <asm/fixmap.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 29 | |
| 30 | #include <asm/mach/arch.h> |
| 31 | #include <asm/mach/map.h> |
| 32 | |
Russell King | 1b2e2b7 | 2006-08-21 17:06:38 +0100 | [diff] [blame] | 33 | #include "mm.h" |
| 34 | |
Russell King | 012d1f4 | 2008-09-06 10:57:03 +0100 | [diff] [blame] | 35 | static unsigned long phys_initrd_start __initdata = 0; |
| 36 | static unsigned long phys_initrd_size __initdata = 0; |
| 37 | |
Jeremy Kerr | 2b0d8c2 | 2010-01-11 23:17:34 +0100 | [diff] [blame] | 38 | static int __init early_initrd(char *p) |
Russell King | 012d1f4 | 2008-09-06 10:57:03 +0100 | [diff] [blame] | 39 | { |
| 40 | unsigned long start, size; |
Jeremy Kerr | 2b0d8c2 | 2010-01-11 23:17:34 +0100 | [diff] [blame] | 41 | char *endp; |
Russell King | 012d1f4 | 2008-09-06 10:57:03 +0100 | [diff] [blame] | 42 | |
Jeremy Kerr | 2b0d8c2 | 2010-01-11 23:17:34 +0100 | [diff] [blame] | 43 | start = memparse(p, &endp); |
| 44 | if (*endp == ',') { |
| 45 | size = memparse(endp + 1, NULL); |
Russell King | 012d1f4 | 2008-09-06 10:57:03 +0100 | [diff] [blame] | 46 | |
| 47 | phys_initrd_start = start; |
| 48 | phys_initrd_size = size; |
| 49 | } |
Jeremy Kerr | 2b0d8c2 | 2010-01-11 23:17:34 +0100 | [diff] [blame] | 50 | return 0; |
Russell King | 012d1f4 | 2008-09-06 10:57:03 +0100 | [diff] [blame] | 51 | } |
Jeremy Kerr | 2b0d8c2 | 2010-01-11 23:17:34 +0100 | [diff] [blame] | 52 | early_param("initrd", early_initrd); |
Russell King | 012d1f4 | 2008-09-06 10:57:03 +0100 | [diff] [blame] | 53 | |
| 54 | static int __init parse_tag_initrd(const struct tag *tag) |
| 55 | { |
| 56 | printk(KERN_WARNING "ATAG_INITRD is deprecated; " |
| 57 | "please update your bootloader.\n"); |
| 58 | phys_initrd_start = __virt_to_phys(tag->u.initrd.start); |
| 59 | phys_initrd_size = tag->u.initrd.size; |
| 60 | return 0; |
| 61 | } |
| 62 | |
| 63 | __tagtable(ATAG_INITRD, parse_tag_initrd); |
| 64 | |
| 65 | static int __init parse_tag_initrd2(const struct tag *tag) |
| 66 | { |
| 67 | phys_initrd_start = tag->u.initrd.start; |
| 68 | phys_initrd_size = tag->u.initrd.size; |
| 69 | return 0; |
| 70 | } |
| 71 | |
| 72 | __tagtable(ATAG_INITRD2, parse_tag_initrd2); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 73 | |
| 74 | /* |
Nicolas Pitre | 4b5f32c | 2008-10-06 13:24:40 -0400 | [diff] [blame] | 75 | * This keeps memory configuration data used by a couple memory |
| 76 | * initialization functions, as well as show_mem() for the skipping |
| 77 | * of holes in the memory map. It is populated by arm_add_memory(). |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 78 | */ |
Nicolas Pitre | 4b5f32c | 2008-10-06 13:24:40 -0400 | [diff] [blame] | 79 | struct meminfo meminfo; |
Ray Lehtiniemi | 5e70982 | 2006-11-07 03:19:15 +0100 | [diff] [blame] | 80 | |
David Rientjes | b2b755b | 2011-03-24 15:18:15 -0700 | [diff] [blame] | 81 | void show_mem(unsigned int filter) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 82 | { |
| 83 | int free = 0, total = 0, reserved = 0; |
Russell King | be37030 | 2010-05-07 17:40:33 +0100 | [diff] [blame] | 84 | int shared = 0, cached = 0, slab = 0, i; |
Ray Lehtiniemi | 5e70982 | 2006-11-07 03:19:15 +0100 | [diff] [blame] | 85 | struct meminfo * mi = &meminfo; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 86 | |
| 87 | printk("Mem-info:\n"); |
David Rientjes | 7bf02ea | 2011-05-24 17:11:16 -0700 | [diff] [blame^] | 88 | show_free_areas(filter); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 89 | |
Russell King | be37030 | 2010-05-07 17:40:33 +0100 | [diff] [blame] | 90 | for_each_bank (i, mi) { |
| 91 | struct membank *bank = &mi->bank[i]; |
| 92 | unsigned int pfn1, pfn2; |
| 93 | struct page *page, *end; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 94 | |
Russell King | be37030 | 2010-05-07 17:40:33 +0100 | [diff] [blame] | 95 | pfn1 = bank_pfn_start(bank); |
| 96 | pfn2 = bank_pfn_end(bank); |
Ray Lehtiniemi | 5e70982 | 2006-11-07 03:19:15 +0100 | [diff] [blame] | 97 | |
Russell King | be37030 | 2010-05-07 17:40:33 +0100 | [diff] [blame] | 98 | page = pfn_to_page(pfn1); |
| 99 | end = pfn_to_page(pfn2 - 1) + 1; |
| 100 | |
| 101 | do { |
| 102 | total++; |
| 103 | if (PageReserved(page)) |
| 104 | reserved++; |
| 105 | else if (PageSwapCache(page)) |
| 106 | cached++; |
| 107 | else if (PageSlab(page)) |
| 108 | slab++; |
| 109 | else if (!page_count(page)) |
| 110 | free++; |
| 111 | else |
| 112 | shared += page_count(page) - 1; |
| 113 | page++; |
| 114 | } while (page < end); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 115 | } |
| 116 | |
| 117 | printk("%d pages of RAM\n", total); |
| 118 | printk("%d free pages\n", free); |
| 119 | printk("%d reserved pages\n", reserved); |
| 120 | printk("%d slab pages\n", slab); |
| 121 | printk("%d pages shared\n", shared); |
| 122 | printk("%d pages swap cached\n", cached); |
| 123 | } |
| 124 | |
Russell King | f25b4b4 | 2010-10-27 19:49:33 +0100 | [diff] [blame] | 125 | static void __init find_limits(unsigned long *min, unsigned long *max_low, |
| 126 | unsigned long *max_high) |
Russell King | dde5828 | 2009-08-15 12:36:00 +0100 | [diff] [blame] | 127 | { |
Russell King | f25b4b4 | 2010-10-27 19:49:33 +0100 | [diff] [blame] | 128 | struct meminfo *mi = &meminfo; |
Russell King | dde5828 | 2009-08-15 12:36:00 +0100 | [diff] [blame] | 129 | int i; |
| 130 | |
| 131 | *min = -1UL; |
| 132 | *max_low = *max_high = 0; |
| 133 | |
Russell King | be37030 | 2010-05-07 17:40:33 +0100 | [diff] [blame] | 134 | for_each_bank (i, mi) { |
Russell King | dde5828 | 2009-08-15 12:36:00 +0100 | [diff] [blame] | 135 | struct membank *bank = &mi->bank[i]; |
| 136 | unsigned long start, end; |
| 137 | |
| 138 | start = bank_pfn_start(bank); |
| 139 | end = bank_pfn_end(bank); |
| 140 | |
| 141 | if (*min > start) |
| 142 | *min = start; |
| 143 | if (*max_high < end) |
| 144 | *max_high = end; |
| 145 | if (bank->highmem) |
| 146 | continue; |
| 147 | if (*max_low < end) |
| 148 | *max_low = end; |
| 149 | } |
| 150 | } |
| 151 | |
Russell King | a801d27 | 2010-10-27 19:27:44 +0100 | [diff] [blame] | 152 | static void __init arm_bootmem_init(unsigned long start_pfn, |
| 153 | unsigned long end_pfn) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 154 | { |
Benjamin Herrenschmidt | 719c1514 | 2010-08-05 12:55:55 +1000 | [diff] [blame] | 155 | struct memblock_region *reg; |
Russell King | 9007205 | 2005-10-28 14:48:37 +0100 | [diff] [blame] | 156 | unsigned int boot_pages; |
Russell King | 2778f62 | 2010-07-09 16:27:52 +0100 | [diff] [blame] | 157 | phys_addr_t bitmap; |
Russell King | 9007205 | 2005-10-28 14:48:37 +0100 | [diff] [blame] | 158 | pg_data_t *pgdat; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 159 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 160 | /* |
Russell King | 2778f62 | 2010-07-09 16:27:52 +0100 | [diff] [blame] | 161 | * Allocate the bootmem bitmap page. This must be in a region |
| 162 | * of memory which has already been mapped. |
Russell King | 9007205 | 2005-10-28 14:48:37 +0100 | [diff] [blame] | 163 | */ |
| 164 | boot_pages = bootmem_bootmap_pages(end_pfn - start_pfn); |
Russell King | 2778f62 | 2010-07-09 16:27:52 +0100 | [diff] [blame] | 165 | bitmap = memblock_alloc_base(boot_pages << PAGE_SHIFT, L1_CACHE_BYTES, |
| 166 | __pfn_to_phys(end_pfn)); |
Russell King | 9007205 | 2005-10-28 14:48:37 +0100 | [diff] [blame] | 167 | |
| 168 | /* |
Russell King | be37030 | 2010-05-07 17:40:33 +0100 | [diff] [blame] | 169 | * Initialise the bootmem allocator, handing the |
Russell King | 9007205 | 2005-10-28 14:48:37 +0100 | [diff] [blame] | 170 | * memory banks over to bootmem. |
| 171 | */ |
Russell King | be37030 | 2010-05-07 17:40:33 +0100 | [diff] [blame] | 172 | node_set_online(0); |
| 173 | pgdat = NODE_DATA(0); |
Russell King | 2778f62 | 2010-07-09 16:27:52 +0100 | [diff] [blame] | 174 | init_bootmem_node(pgdat, __phys_to_pfn(bitmap), start_pfn, end_pfn); |
Russell King | 9007205 | 2005-10-28 14:48:37 +0100 | [diff] [blame] | 175 | |
Russell King | a801d27 | 2010-10-27 19:27:44 +0100 | [diff] [blame] | 176 | /* Free the lowmem regions from memblock into bootmem. */ |
| 177 | for_each_memblock(memory, reg) { |
| 178 | unsigned long start = memblock_region_memory_base_pfn(reg); |
| 179 | unsigned long end = memblock_region_memory_end_pfn(reg); |
| 180 | |
| 181 | if (end >= end_pfn) |
| 182 | end = end_pfn; |
| 183 | if (start >= end) |
| 184 | break; |
| 185 | |
| 186 | free_bootmem(__pfn_to_phys(start), (end - start) << PAGE_SHIFT); |
Russell King | d2a38ef | 2008-10-01 16:56:15 +0100 | [diff] [blame] | 187 | } |
Russell King | 9007205 | 2005-10-28 14:48:37 +0100 | [diff] [blame] | 188 | |
Russell King | a801d27 | 2010-10-27 19:27:44 +0100 | [diff] [blame] | 189 | /* Reserve the lowmem memblock reserved regions in bootmem. */ |
Benjamin Herrenschmidt | 719c1514 | 2010-08-05 12:55:55 +1000 | [diff] [blame] | 190 | for_each_memblock(reserved, reg) { |
Russell King | a801d27 | 2010-10-27 19:27:44 +0100 | [diff] [blame] | 191 | unsigned long start = memblock_region_reserved_base_pfn(reg); |
| 192 | unsigned long end = memblock_region_reserved_end_pfn(reg); |
| 193 | |
| 194 | if (end >= end_pfn) |
| 195 | end = end_pfn; |
| 196 | if (start >= end) |
| 197 | break; |
| 198 | |
| 199 | reserve_bootmem(__pfn_to_phys(start), |
| 200 | (end - start) << PAGE_SHIFT, BOOTMEM_DEFAULT); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 201 | } |
Russell King | b7a69ac | 2008-10-01 16:58:32 +0100 | [diff] [blame] | 202 | } |
| 203 | |
Russell King | be20902 | 2011-05-11 15:39:00 +0100 | [diff] [blame] | 204 | #ifdef CONFIG_ZONE_DMA |
| 205 | static void __init arm_adjust_dma_zone(unsigned long *size, unsigned long *hole, |
| 206 | unsigned long dma_size) |
| 207 | { |
| 208 | if (size[0] <= dma_size) |
| 209 | return; |
| 210 | |
| 211 | size[ZONE_NORMAL] = size[0] - dma_size; |
| 212 | size[ZONE_DMA] = dma_size; |
| 213 | hole[ZONE_NORMAL] = hole[0]; |
| 214 | hole[ZONE_DMA] = 0; |
| 215 | } |
| 216 | #endif |
| 217 | |
Russell King | a2c54d2 | 2010-10-27 19:17:31 +0100 | [diff] [blame] | 218 | static void __init arm_bootmem_free(unsigned long min, unsigned long max_low, |
| 219 | unsigned long max_high) |
Russell King | b7a69ac | 2008-10-01 16:58:32 +0100 | [diff] [blame] | 220 | { |
| 221 | unsigned long zone_size[MAX_NR_ZONES], zhole_size[MAX_NR_ZONES]; |
Russell King | a2c54d2 | 2010-10-27 19:17:31 +0100 | [diff] [blame] | 222 | struct memblock_region *reg; |
Russell King | b7a69ac | 2008-10-01 16:58:32 +0100 | [diff] [blame] | 223 | |
Russell King | 9007205 | 2005-10-28 14:48:37 +0100 | [diff] [blame] | 224 | /* |
Russell King | be37030 | 2010-05-07 17:40:33 +0100 | [diff] [blame] | 225 | * initialise the zones. |
Russell King | 9007205 | 2005-10-28 14:48:37 +0100 | [diff] [blame] | 226 | */ |
| 227 | memset(zone_size, 0, sizeof(zone_size)); |
Russell King | 9007205 | 2005-10-28 14:48:37 +0100 | [diff] [blame] | 228 | |
| 229 | /* |
Russell King | be37030 | 2010-05-07 17:40:33 +0100 | [diff] [blame] | 230 | * The memory size has already been determined. If we need |
| 231 | * to do anything fancy with the allocation of this memory |
| 232 | * to the zones, now is the time to do it. |
Russell King | 9007205 | 2005-10-28 14:48:37 +0100 | [diff] [blame] | 233 | */ |
Russell King | dde5828 | 2009-08-15 12:36:00 +0100 | [diff] [blame] | 234 | zone_size[0] = max_low - min; |
| 235 | #ifdef CONFIG_HIGHMEM |
| 236 | zone_size[ZONE_HIGHMEM] = max_high - max_low; |
| 237 | #endif |
Russell King | 9007205 | 2005-10-28 14:48:37 +0100 | [diff] [blame] | 238 | |
| 239 | /* |
Russell King | be37030 | 2010-05-07 17:40:33 +0100 | [diff] [blame] | 240 | * Calculate the size of the holes. |
| 241 | * holes = node_size - sum(bank_sizes) |
Russell King | 9007205 | 2005-10-28 14:48:37 +0100 | [diff] [blame] | 242 | */ |
Russell King | dde5828 | 2009-08-15 12:36:00 +0100 | [diff] [blame] | 243 | memcpy(zhole_size, zone_size, sizeof(zhole_size)); |
Russell King | a2c54d2 | 2010-10-27 19:17:31 +0100 | [diff] [blame] | 244 | for_each_memblock(memory, reg) { |
| 245 | unsigned long start = memblock_region_memory_base_pfn(reg); |
| 246 | unsigned long end = memblock_region_memory_end_pfn(reg); |
| 247 | |
| 248 | if (start < max_low) { |
| 249 | unsigned long low_end = min(end, max_low); |
| 250 | zhole_size[0] -= low_end - start; |
| 251 | } |
Russell King | dde5828 | 2009-08-15 12:36:00 +0100 | [diff] [blame] | 252 | #ifdef CONFIG_HIGHMEM |
Russell King | a2c54d2 | 2010-10-27 19:17:31 +0100 | [diff] [blame] | 253 | if (end > max_low) { |
| 254 | unsigned long high_start = max(start, max_low); |
| 255 | zhole_size[ZONE_HIGHMEM] -= end - high_start; |
| 256 | } |
Russell King | dde5828 | 2009-08-15 12:36:00 +0100 | [diff] [blame] | 257 | #endif |
Russell King | dde5828 | 2009-08-15 12:36:00 +0100 | [diff] [blame] | 258 | } |
Russell King | 9007205 | 2005-10-28 14:48:37 +0100 | [diff] [blame] | 259 | |
Russell King | be20902 | 2011-05-11 15:39:00 +0100 | [diff] [blame] | 260 | #ifdef ARM_DMA_ZONE_SIZE |
| 261 | #ifndef CONFIG_ZONE_DMA |
| 262 | #error ARM_DMA_ZONE_SIZE set but no DMA zone to limit allocations |
| 263 | #endif |
| 264 | |
Russell King | 9007205 | 2005-10-28 14:48:37 +0100 | [diff] [blame] | 265 | /* |
| 266 | * Adjust the sizes according to any special requirements for |
| 267 | * this machine type. |
| 268 | */ |
Russell King | be20902 | 2011-05-11 15:39:00 +0100 | [diff] [blame] | 269 | arm_adjust_dma_zone(zone_size, zhole_size, |
| 270 | ARM_DMA_ZONE_SIZE >> PAGE_SHIFT); |
| 271 | #endif |
Russell King | 9007205 | 2005-10-28 14:48:37 +0100 | [diff] [blame] | 272 | |
Russell King | be37030 | 2010-05-07 17:40:33 +0100 | [diff] [blame] | 273 | free_area_init_node(0, zone_size, min, zhole_size); |
Russell King | 9007205 | 2005-10-28 14:48:37 +0100 | [diff] [blame] | 274 | } |
| 275 | |
Russell King | b7cfda9 | 2009-09-07 15:06:42 +0100 | [diff] [blame] | 276 | #ifndef CONFIG_SPARSEMEM |
| 277 | int pfn_valid(unsigned long pfn) |
| 278 | { |
Benjamin Herrenschmidt | 5e6f6aa | 2010-08-04 13:23:02 +1000 | [diff] [blame] | 279 | return memblock_is_memory(pfn << PAGE_SHIFT); |
Russell King | b7cfda9 | 2009-09-07 15:06:42 +0100 | [diff] [blame] | 280 | } |
| 281 | EXPORT_SYMBOL(pfn_valid); |
Russell King | 657e12f | 2009-10-29 17:06:17 +0000 | [diff] [blame] | 282 | |
Russell King | eda2e5d | 2010-07-01 12:00:57 +0100 | [diff] [blame] | 283 | static void arm_memory_present(void) |
Russell King | 657e12f | 2009-10-29 17:06:17 +0000 | [diff] [blame] | 284 | { |
| 285 | } |
| 286 | #else |
Russell King | eda2e5d | 2010-07-01 12:00:57 +0100 | [diff] [blame] | 287 | static void arm_memory_present(void) |
Russell King | 657e12f | 2009-10-29 17:06:17 +0000 | [diff] [blame] | 288 | { |
Benjamin Herrenschmidt | 719c1514 | 2010-08-05 12:55:55 +1000 | [diff] [blame] | 289 | struct memblock_region *reg; |
Benjamin Herrenschmidt | 719c1514 | 2010-08-05 12:55:55 +1000 | [diff] [blame] | 290 | |
Yinghai Lu | 7c99636 | 2010-09-16 00:20:36 -0700 | [diff] [blame] | 291 | for_each_memblock(memory, reg) |
Yinghai Lu | c7fc2de | 2010-10-12 14:07:09 -0700 | [diff] [blame] | 292 | memory_present(0, memblock_region_memory_base_pfn(reg), |
| 293 | memblock_region_memory_end_pfn(reg)); |
Russell King | 657e12f | 2009-10-29 17:06:17 +0000 | [diff] [blame] | 294 | } |
Russell King | b7cfda9 | 2009-09-07 15:06:42 +0100 | [diff] [blame] | 295 | #endif |
| 296 | |
Russell King | 7dc50ec | 2010-10-27 18:14:56 +0100 | [diff] [blame] | 297 | static int __init meminfo_cmp(const void *_a, const void *_b) |
| 298 | { |
| 299 | const struct membank *a = _a, *b = _b; |
| 300 | long cmp = bank_pfn_start(a) - bank_pfn_start(b); |
| 301 | return cmp < 0 ? -1 : cmp > 0 ? 1 : 0; |
| 302 | } |
| 303 | |
Russell King | 8d717a5 | 2010-05-22 19:47:18 +0100 | [diff] [blame] | 304 | void __init arm_memblock_init(struct meminfo *mi, struct machine_desc *mdesc) |
Russell King | 2778f62 | 2010-07-09 16:27:52 +0100 | [diff] [blame] | 305 | { |
| 306 | int i; |
| 307 | |
Russell King | 7dc50ec | 2010-10-27 18:14:56 +0100 | [diff] [blame] | 308 | sort(&meminfo.bank, meminfo.nr_banks, sizeof(meminfo.bank[0]), meminfo_cmp, NULL); |
| 309 | |
Russell King | 2778f62 | 2010-07-09 16:27:52 +0100 | [diff] [blame] | 310 | memblock_init(); |
| 311 | for (i = 0; i < mi->nr_banks; i++) |
| 312 | memblock_add(mi->bank[i].start, mi->bank[i].size); |
| 313 | |
| 314 | /* Register the kernel text, kernel data and initrd with memblock. */ |
| 315 | #ifdef CONFIG_XIP_KERNEL |
Russell King | 842eab4 | 2010-10-01 14:12:22 +0100 | [diff] [blame] | 316 | memblock_reserve(__pa(_sdata), _end - _sdata); |
Russell King | 2778f62 | 2010-07-09 16:27:52 +0100 | [diff] [blame] | 317 | #else |
| 318 | memblock_reserve(__pa(_stext), _end - _stext); |
| 319 | #endif |
| 320 | #ifdef CONFIG_BLK_DEV_INITRD |
Russell King | b0a2679 | 2011-01-30 11:21:05 +0000 | [diff] [blame] | 321 | if (phys_initrd_size && |
| 322 | memblock_is_region_reserved(phys_initrd_start, phys_initrd_size)) { |
| 323 | pr_err("INITRD: 0x%08lx+0x%08lx overlaps in-use memory region - disabling initrd\n", |
| 324 | phys_initrd_start, phys_initrd_size); |
| 325 | phys_initrd_start = phys_initrd_size = 0; |
| 326 | } |
Russell King | 2778f62 | 2010-07-09 16:27:52 +0100 | [diff] [blame] | 327 | if (phys_initrd_size) { |
| 328 | memblock_reserve(phys_initrd_start, phys_initrd_size); |
| 329 | |
| 330 | /* Now convert initrd to virtual addresses */ |
| 331 | initrd_start = __phys_to_virt(phys_initrd_start); |
| 332 | initrd_end = initrd_start + phys_initrd_size; |
| 333 | } |
| 334 | #endif |
| 335 | |
| 336 | arm_mm_memblock_reserve(); |
| 337 | |
Russell King | 8d717a5 | 2010-05-22 19:47:18 +0100 | [diff] [blame] | 338 | /* reserve any platform specific memblock areas */ |
| 339 | if (mdesc->reserve) |
| 340 | mdesc->reserve(); |
| 341 | |
Russell King | 2778f62 | 2010-07-09 16:27:52 +0100 | [diff] [blame] | 342 | memblock_analyze(); |
| 343 | memblock_dump_all(); |
| 344 | } |
| 345 | |
Russell King | 8d717a5 | 2010-05-22 19:47:18 +0100 | [diff] [blame] | 346 | void __init bootmem_init(void) |
Russell King | 9007205 | 2005-10-28 14:48:37 +0100 | [diff] [blame] | 347 | { |
Russell King | dde5828 | 2009-08-15 12:36:00 +0100 | [diff] [blame] | 348 | unsigned long min, max_low, max_high; |
Russell King | 9007205 | 2005-10-28 14:48:37 +0100 | [diff] [blame] | 349 | |
Russell King | dde5828 | 2009-08-15 12:36:00 +0100 | [diff] [blame] | 350 | max_low = max_high = 0; |
| 351 | |
Russell King | f25b4b4 | 2010-10-27 19:49:33 +0100 | [diff] [blame] | 352 | find_limits(&min, &max_low, &max_high); |
Russell King | be37030 | 2010-05-07 17:40:33 +0100 | [diff] [blame] | 353 | |
Russell King | a801d27 | 2010-10-27 19:27:44 +0100 | [diff] [blame] | 354 | arm_bootmem_init(min, max_low); |
Russell King | be37030 | 2010-05-07 17:40:33 +0100 | [diff] [blame] | 355 | |
Russell King | be37030 | 2010-05-07 17:40:33 +0100 | [diff] [blame] | 356 | /* |
Russell King | be37030 | 2010-05-07 17:40:33 +0100 | [diff] [blame] | 357 | * Sparsemem tries to allocate bootmem in memory_present(), |
| 358 | * so must be done after the fixed reservations |
| 359 | */ |
Russell King | eda2e5d | 2010-07-01 12:00:57 +0100 | [diff] [blame] | 360 | arm_memory_present(); |
Russell King | 9007205 | 2005-10-28 14:48:37 +0100 | [diff] [blame] | 361 | |
Russell King | b7a69ac | 2008-10-01 16:58:32 +0100 | [diff] [blame] | 362 | /* |
| 363 | * sparse_init() needs the bootmem allocator up and running. |
| 364 | */ |
| 365 | sparse_init(); |
| 366 | |
| 367 | /* |
Russell King | be37030 | 2010-05-07 17:40:33 +0100 | [diff] [blame] | 368 | * Now free the memory - free_area_init_node needs |
Russell King | b7a69ac | 2008-10-01 16:58:32 +0100 | [diff] [blame] | 369 | * the sparse mem_map arrays initialized by sparse_init() |
| 370 | * for memmap_init_zone(), otherwise all PFNs are invalid. |
| 371 | */ |
Russell King | a2c54d2 | 2010-10-27 19:17:31 +0100 | [diff] [blame] | 372 | arm_bootmem_free(min, max_low, max_high); |
Russell King | b7a69ac | 2008-10-01 16:58:32 +0100 | [diff] [blame] | 373 | |
Will Deacon | cae6292 | 2011-02-15 12:42:57 +0100 | [diff] [blame] | 374 | high_memory = __va(((phys_addr_t)max_low << PAGE_SHIFT) - 1) + 1; |
Russell King | 9007205 | 2005-10-28 14:48:37 +0100 | [diff] [blame] | 375 | |
| 376 | /* |
| 377 | * This doesn't seem to be used by the Linux memory manager any |
| 378 | * more, but is used by ll_rw_block. If we can get rid of it, we |
| 379 | * also get rid of some of the stuff above as well. |
| 380 | * |
| 381 | * Note: max_low_pfn and max_pfn reflect the number of _pages_ in |
| 382 | * the system, not the maximum PFN. |
| 383 | */ |
Russell King | dde5828 | 2009-08-15 12:36:00 +0100 | [diff] [blame] | 384 | max_low_pfn = max_low - PHYS_PFN_OFFSET; |
| 385 | max_pfn = max_high - PHYS_PFN_OFFSET; |
Russell King | 9007205 | 2005-10-28 14:48:37 +0100 | [diff] [blame] | 386 | } |
| 387 | |
Nicolas Pitre | 6db015e | 2008-09-17 14:50:42 -0400 | [diff] [blame] | 388 | static inline int free_area(unsigned long pfn, unsigned long end, char *s) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 389 | { |
Nicolas Pitre | 6db015e | 2008-09-17 14:50:42 -0400 | [diff] [blame] | 390 | unsigned int pages = 0, size = (end - pfn) << (PAGE_SHIFT - 10); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 391 | |
Nicolas Pitre | 6db015e | 2008-09-17 14:50:42 -0400 | [diff] [blame] | 392 | for (; pfn < end; pfn++) { |
| 393 | struct page *page = pfn_to_page(pfn); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 394 | ClearPageReserved(page); |
Nick Piggin | 7835e98 | 2006-03-22 00:08:40 -0800 | [diff] [blame] | 395 | init_page_count(page); |
Nicolas Pitre | 6db015e | 2008-09-17 14:50:42 -0400 | [diff] [blame] | 396 | __free_page(page); |
| 397 | pages++; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 398 | } |
| 399 | |
| 400 | if (size && s) |
| 401 | printk(KERN_INFO "Freeing %s memory: %dK\n", s, size); |
Nicolas Pitre | 6db015e | 2008-09-17 14:50:42 -0400 | [diff] [blame] | 402 | |
| 403 | return pages; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 404 | } |
| 405 | |
Russell King | a013053 | 2005-06-27 14:16:47 +0100 | [diff] [blame] | 406 | static inline void |
Russell King | be37030 | 2010-05-07 17:40:33 +0100 | [diff] [blame] | 407 | free_memmap(unsigned long start_pfn, unsigned long end_pfn) |
Russell King | a013053 | 2005-06-27 14:16:47 +0100 | [diff] [blame] | 408 | { |
| 409 | struct page *start_pg, *end_pg; |
| 410 | unsigned long pg, pgend; |
| 411 | |
| 412 | /* |
| 413 | * Convert start_pfn/end_pfn to a struct page pointer. |
| 414 | */ |
Catalin Marinas | 3257f43 | 2009-10-06 17:57:22 +0100 | [diff] [blame] | 415 | start_pg = pfn_to_page(start_pfn - 1) + 1; |
Will Deacon | 9af386c | 2011-04-28 18:44:31 +0100 | [diff] [blame] | 416 | end_pg = pfn_to_page(end_pfn - 1) + 1; |
Russell King | a013053 | 2005-06-27 14:16:47 +0100 | [diff] [blame] | 417 | |
| 418 | /* |
| 419 | * Convert to physical addresses, and |
| 420 | * round start upwards and end downwards. |
| 421 | */ |
Will Deacon | cae6292 | 2011-02-15 12:42:57 +0100 | [diff] [blame] | 422 | pg = (unsigned long)PAGE_ALIGN(__pa(start_pg)); |
| 423 | pgend = (unsigned long)__pa(end_pg) & PAGE_MASK; |
Russell King | a013053 | 2005-06-27 14:16:47 +0100 | [diff] [blame] | 424 | |
| 425 | /* |
| 426 | * If there are free pages between these, |
| 427 | * free the section of the memmap array. |
| 428 | */ |
| 429 | if (pg < pgend) |
Russell King | be37030 | 2010-05-07 17:40:33 +0100 | [diff] [blame] | 430 | free_bootmem(pg, pgend - pg); |
Russell King | a013053 | 2005-06-27 14:16:47 +0100 | [diff] [blame] | 431 | } |
| 432 | |
| 433 | /* |
| 434 | * The mem_map array can get very big. Free the unused area of the memory map. |
| 435 | */ |
Russell King | be37030 | 2010-05-07 17:40:33 +0100 | [diff] [blame] | 436 | static void __init free_unused_memmap(struct meminfo *mi) |
Russell King | a013053 | 2005-06-27 14:16:47 +0100 | [diff] [blame] | 437 | { |
| 438 | unsigned long bank_start, prev_bank_end = 0; |
| 439 | unsigned int i; |
| 440 | |
| 441 | /* |
Michael Bohan | 3260e52 | 2010-06-14 13:06:56 -0700 | [diff] [blame] | 442 | * This relies on each bank being in address order. |
| 443 | * The banks are sorted previously in bootmem_init(). |
Russell King | a013053 | 2005-06-27 14:16:47 +0100 | [diff] [blame] | 444 | */ |
Russell King | be37030 | 2010-05-07 17:40:33 +0100 | [diff] [blame] | 445 | for_each_bank(i, mi) { |
Russell King | d2a38ef | 2008-10-01 16:56:15 +0100 | [diff] [blame] | 446 | struct membank *bank = &mi->bank[i]; |
| 447 | |
| 448 | bank_start = bank_pfn_start(bank); |
Russell King | a013053 | 2005-06-27 14:16:47 +0100 | [diff] [blame] | 449 | |
Will Deacon | 9af386c | 2011-04-28 18:44:31 +0100 | [diff] [blame] | 450 | #ifdef CONFIG_SPARSEMEM |
| 451 | /* |
| 452 | * Take care not to free memmap entries that don't exist |
| 453 | * due to SPARSEMEM sections which aren't present. |
| 454 | */ |
| 455 | bank_start = min(bank_start, |
| 456 | ALIGN(prev_bank_end, PAGES_PER_SECTION)); |
| 457 | #endif |
Russell King | a013053 | 2005-06-27 14:16:47 +0100 | [diff] [blame] | 458 | /* |
| 459 | * If we had a previous bank, and there is a space |
| 460 | * between the current bank and the previous, free it. |
| 461 | */ |
Michael Bohan | 3260e52 | 2010-06-14 13:06:56 -0700 | [diff] [blame] | 462 | if (prev_bank_end && prev_bank_end < bank_start) |
Russell King | be37030 | 2010-05-07 17:40:33 +0100 | [diff] [blame] | 463 | free_memmap(prev_bank_end, bank_start); |
Russell King | a013053 | 2005-06-27 14:16:47 +0100 | [diff] [blame] | 464 | |
Michael Bohan | 3260e52 | 2010-06-14 13:06:56 -0700 | [diff] [blame] | 465 | /* |
| 466 | * Align up here since the VM subsystem insists that the |
| 467 | * memmap entries are valid from the bank end aligned to |
| 468 | * MAX_ORDER_NR_PAGES. |
| 469 | */ |
| 470 | prev_bank_end = ALIGN(bank_pfn_end(bank), MAX_ORDER_NR_PAGES); |
Russell King | a013053 | 2005-06-27 14:16:47 +0100 | [diff] [blame] | 471 | } |
Will Deacon | 9af386c | 2011-04-28 18:44:31 +0100 | [diff] [blame] | 472 | |
| 473 | #ifdef CONFIG_SPARSEMEM |
| 474 | if (!IS_ALIGNED(prev_bank_end, PAGES_PER_SECTION)) |
| 475 | free_memmap(prev_bank_end, |
| 476 | ALIGN(prev_bank_end, PAGES_PER_SECTION)); |
| 477 | #endif |
Russell King | a013053 | 2005-06-27 14:16:47 +0100 | [diff] [blame] | 478 | } |
| 479 | |
Russell King | d0e775a | 2010-10-27 19:37:06 +0100 | [diff] [blame] | 480 | static void __init free_highpages(void) |
| 481 | { |
| 482 | #ifdef CONFIG_HIGHMEM |
Russell King | df4f14c | 2010-10-27 19:45:49 +0100 | [diff] [blame] | 483 | unsigned long max_low = max_low_pfn + PHYS_PFN_OFFSET; |
| 484 | struct memblock_region *mem, *res; |
Russell King | d0e775a | 2010-10-27 19:37:06 +0100 | [diff] [blame] | 485 | |
| 486 | /* set highmem page free */ |
Russell King | df4f14c | 2010-10-27 19:45:49 +0100 | [diff] [blame] | 487 | for_each_memblock(memory, mem) { |
| 488 | unsigned long start = memblock_region_memory_base_pfn(mem); |
| 489 | unsigned long end = memblock_region_memory_end_pfn(mem); |
| 490 | |
| 491 | /* Ignore complete lowmem entries */ |
| 492 | if (end <= max_low) |
| 493 | continue; |
| 494 | |
| 495 | /* Truncate partial highmem entries */ |
| 496 | if (start < max_low) |
| 497 | start = max_low; |
| 498 | |
| 499 | /* Find and exclude any reserved regions */ |
| 500 | for_each_memblock(reserved, res) { |
| 501 | unsigned long res_start, res_end; |
| 502 | |
| 503 | res_start = memblock_region_reserved_base_pfn(res); |
| 504 | res_end = memblock_region_reserved_end_pfn(res); |
| 505 | |
| 506 | if (res_end < start) |
| 507 | continue; |
| 508 | if (res_start < start) |
| 509 | res_start = start; |
| 510 | if (res_start > end) |
| 511 | res_start = end; |
| 512 | if (res_end > end) |
| 513 | res_end = end; |
| 514 | if (res_start != start) |
| 515 | totalhigh_pages += free_area(start, res_start, |
| 516 | NULL); |
| 517 | start = res_end; |
| 518 | if (start == end) |
| 519 | break; |
| 520 | } |
| 521 | |
| 522 | /* And now free anything which remains */ |
| 523 | if (start < end) |
Russell King | d0e775a | 2010-10-27 19:37:06 +0100 | [diff] [blame] | 524 | totalhigh_pages += free_area(start, end, NULL); |
| 525 | } |
| 526 | totalram_pages += totalhigh_pages; |
| 527 | #endif |
| 528 | } |
| 529 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 530 | /* |
| 531 | * mem_init() marks the free areas in the mem_map and tells us how much |
| 532 | * memory is free. This is done after various parts of the system have |
| 533 | * claimed their memory after the kernel image. |
| 534 | */ |
| 535 | void __init mem_init(void) |
| 536 | { |
Fenkart/Bostandzhyan | db9ef1a | 2010-02-07 21:45:47 +0100 | [diff] [blame] | 537 | unsigned long reserved_pages, free_pages; |
Russell King | 47ea3c1 | 2010-10-27 19:35:29 +0100 | [diff] [blame] | 538 | struct memblock_region *reg; |
Russell King | be37030 | 2010-05-07 17:40:33 +0100 | [diff] [blame] | 539 | int i; |
Linus Walleij | 1dbd30e | 2010-07-12 21:53:28 +0100 | [diff] [blame] | 540 | #ifdef CONFIG_HAVE_TCM |
| 541 | /* These pointers are filled in on TCM detection */ |
| 542 | extern u32 dtcm_end; |
| 543 | extern u32 itcm_end; |
| 544 | #endif |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 545 | |
Nicolas Pitre | 3835f6c | 2008-09-17 15:21:55 -0400 | [diff] [blame] | 546 | max_mapnr = pfn_to_page(max_pfn + PHYS_PFN_OFFSET) - mem_map; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 547 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 548 | /* this will put all unused low memory onto the freelists */ |
Russell King | be37030 | 2010-05-07 17:40:33 +0100 | [diff] [blame] | 549 | free_unused_memmap(&meminfo); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 550 | |
Russell King | be37030 | 2010-05-07 17:40:33 +0100 | [diff] [blame] | 551 | totalram_pages += free_all_bootmem(); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 552 | |
| 553 | #ifdef CONFIG_SA1111 |
| 554 | /* now that our DMA memory is actually so designated, we can free it */ |
Nicolas Pitre | 6db015e | 2008-09-17 14:50:42 -0400 | [diff] [blame] | 555 | totalram_pages += free_area(PHYS_PFN_OFFSET, |
| 556 | __phys_to_pfn(__pa(swapper_pg_dir)), NULL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 557 | #endif |
| 558 | |
Russell King | d0e775a | 2010-10-27 19:37:06 +0100 | [diff] [blame] | 559 | free_highpages(); |
Nicolas Pitre | 3835f6c | 2008-09-17 15:21:55 -0400 | [diff] [blame] | 560 | |
Fenkart/Bostandzhyan | db9ef1a | 2010-02-07 21:45:47 +0100 | [diff] [blame] | 561 | reserved_pages = free_pages = 0; |
| 562 | |
Russell King | be37030 | 2010-05-07 17:40:33 +0100 | [diff] [blame] | 563 | for_each_bank(i, &meminfo) { |
| 564 | struct membank *bank = &meminfo.bank[i]; |
| 565 | unsigned int pfn1, pfn2; |
| 566 | struct page *page, *end; |
Fenkart/Bostandzhyan | db9ef1a | 2010-02-07 21:45:47 +0100 | [diff] [blame] | 567 | |
Russell King | be37030 | 2010-05-07 17:40:33 +0100 | [diff] [blame] | 568 | pfn1 = bank_pfn_start(bank); |
| 569 | pfn2 = bank_pfn_end(bank); |
Fenkart/Bostandzhyan | db9ef1a | 2010-02-07 21:45:47 +0100 | [diff] [blame] | 570 | |
Russell King | be37030 | 2010-05-07 17:40:33 +0100 | [diff] [blame] | 571 | page = pfn_to_page(pfn1); |
| 572 | end = pfn_to_page(pfn2 - 1) + 1; |
Fenkart/Bostandzhyan | db9ef1a | 2010-02-07 21:45:47 +0100 | [diff] [blame] | 573 | |
Russell King | be37030 | 2010-05-07 17:40:33 +0100 | [diff] [blame] | 574 | do { |
| 575 | if (PageReserved(page)) |
| 576 | reserved_pages++; |
| 577 | else if (!page_count(page)) |
| 578 | free_pages++; |
| 579 | page++; |
| 580 | } while (page < end); |
Fenkart/Bostandzhyan | db9ef1a | 2010-02-07 21:45:47 +0100 | [diff] [blame] | 581 | } |
| 582 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 583 | /* |
| 584 | * Since our memory may not be contiguous, calculate the |
| 585 | * real number of pages we have in this system |
| 586 | */ |
| 587 | printk(KERN_INFO "Memory:"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 588 | num_physpages = 0; |
Russell King | 47ea3c1 | 2010-10-27 19:35:29 +0100 | [diff] [blame] | 589 | for_each_memblock(memory, reg) { |
| 590 | unsigned long pages = memblock_region_memory_end_pfn(reg) - |
| 591 | memblock_region_memory_base_pfn(reg); |
| 592 | num_physpages += pages; |
| 593 | printk(" %ldMB", pages >> (20 - PAGE_SHIFT)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 594 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 595 | printk(" = %luMB total\n", num_physpages >> (20 - PAGE_SHIFT)); |
Nicolas Pitre | 6db015e | 2008-09-17 14:50:42 -0400 | [diff] [blame] | 596 | |
Fenkart/Bostandzhyan | db9ef1a | 2010-02-07 21:45:47 +0100 | [diff] [blame] | 597 | printk(KERN_NOTICE "Memory: %luk/%luk available, %luk reserved, %luK highmem\n", |
| 598 | nr_free_pages() << (PAGE_SHIFT-10), |
| 599 | free_pages << (PAGE_SHIFT-10), |
| 600 | reserved_pages << (PAGE_SHIFT-10), |
Andreas Fenkart | 4b52940 | 2010-01-08 14:42:31 -0800 | [diff] [blame] | 601 | totalhigh_pages << (PAGE_SHIFT-10)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 602 | |
Fenkart/Bostandzhyan | db9ef1a | 2010-02-07 21:45:47 +0100 | [diff] [blame] | 603 | #define MLK(b, t) b, t, ((t) - (b)) >> 10 |
| 604 | #define MLM(b, t) b, t, ((t) - (b)) >> 20 |
| 605 | #define MLK_ROUNDUP(b, t) b, t, DIV_ROUND_UP(((t) - (b)), SZ_1K) |
| 606 | |
| 607 | printk(KERN_NOTICE "Virtual kernel memory layout:\n" |
| 608 | " vector : 0x%08lx - 0x%08lx (%4ld kB)\n" |
Linus Walleij | 07d2a5c | 2010-07-12 21:52:34 +0100 | [diff] [blame] | 609 | #ifdef CONFIG_HAVE_TCM |
Linus Walleij | 07d2a5c | 2010-07-12 21:52:34 +0100 | [diff] [blame] | 610 | " DTCM : 0x%08lx - 0x%08lx (%4ld kB)\n" |
Linus Walleij | 07d2a5c | 2010-07-12 21:52:34 +0100 | [diff] [blame] | 611 | " ITCM : 0x%08lx - 0x%08lx (%4ld kB)\n" |
| 612 | #endif |
Fenkart/Bostandzhyan | db9ef1a | 2010-02-07 21:45:47 +0100 | [diff] [blame] | 613 | " fixmap : 0x%08lx - 0x%08lx (%4ld kB)\n" |
Fenkart/Bostandzhyan | a7bd08c | 2010-02-07 21:46:33 +0100 | [diff] [blame] | 614 | #ifdef CONFIG_MMU |
| 615 | " DMA : 0x%08lx - 0x%08lx (%4ld MB)\n" |
| 616 | #endif |
Fenkart/Bostandzhyan | db9ef1a | 2010-02-07 21:45:47 +0100 | [diff] [blame] | 617 | " vmalloc : 0x%08lx - 0x%08lx (%4ld MB)\n" |
| 618 | " lowmem : 0x%08lx - 0x%08lx (%4ld MB)\n" |
| 619 | #ifdef CONFIG_HIGHMEM |
| 620 | " pkmap : 0x%08lx - 0x%08lx (%4ld MB)\n" |
| 621 | #endif |
| 622 | " modules : 0x%08lx - 0x%08lx (%4ld MB)\n" |
| 623 | " .init : 0x%p" " - 0x%p" " (%4d kB)\n" |
| 624 | " .text : 0x%p" " - 0x%p" " (%4d kB)\n" |
| 625 | " .data : 0x%p" " - 0x%p" " (%4d kB)\n", |
| 626 | |
| 627 | MLK(UL(CONFIG_VECTORS_BASE), UL(CONFIG_VECTORS_BASE) + |
| 628 | (PAGE_SIZE)), |
Linus Walleij | 07d2a5c | 2010-07-12 21:52:34 +0100 | [diff] [blame] | 629 | #ifdef CONFIG_HAVE_TCM |
Linus Walleij | 1dbd30e | 2010-07-12 21:53:28 +0100 | [diff] [blame] | 630 | MLK(DTCM_OFFSET, (unsigned long) dtcm_end), |
| 631 | MLK(ITCM_OFFSET, (unsigned long) itcm_end), |
Linus Walleij | 07d2a5c | 2010-07-12 21:52:34 +0100 | [diff] [blame] | 632 | #endif |
Fenkart/Bostandzhyan | db9ef1a | 2010-02-07 21:45:47 +0100 | [diff] [blame] | 633 | MLK(FIXADDR_START, FIXADDR_TOP), |
Fenkart/Bostandzhyan | a7bd08c | 2010-02-07 21:46:33 +0100 | [diff] [blame] | 634 | #ifdef CONFIG_MMU |
| 635 | MLM(CONSISTENT_BASE, CONSISTENT_END), |
| 636 | #endif |
Fenkart/Bostandzhyan | c931b4f | 2010-02-07 21:47:17 +0100 | [diff] [blame] | 637 | MLM(VMALLOC_START, VMALLOC_END), |
Fenkart/Bostandzhyan | db9ef1a | 2010-02-07 21:45:47 +0100 | [diff] [blame] | 638 | MLM(PAGE_OFFSET, (unsigned long)high_memory), |
| 639 | #ifdef CONFIG_HIGHMEM |
| 640 | MLM(PKMAP_BASE, (PKMAP_BASE) + (LAST_PKMAP) * |
| 641 | (PAGE_SIZE)), |
| 642 | #endif |
| 643 | MLM(MODULES_VADDR, MODULES_END), |
| 644 | |
| 645 | MLK_ROUNDUP(__init_begin, __init_end), |
| 646 | MLK_ROUNDUP(_text, _etext), |
Russell King | 842eab4 | 2010-10-01 14:12:22 +0100 | [diff] [blame] | 647 | MLK_ROUNDUP(_sdata, _edata)); |
Fenkart/Bostandzhyan | db9ef1a | 2010-02-07 21:45:47 +0100 | [diff] [blame] | 648 | |
| 649 | #undef MLK |
| 650 | #undef MLM |
| 651 | #undef MLK_ROUNDUP |
| 652 | |
Fenkart/Bostandzhyan | a183927 | 2010-02-07 21:47:58 +0100 | [diff] [blame] | 653 | /* |
| 654 | * Check boundaries twice: Some fundamental inconsistencies can |
| 655 | * be detected at build time already. |
| 656 | */ |
| 657 | #ifdef CONFIG_MMU |
| 658 | BUILD_BUG_ON(VMALLOC_END > CONSISTENT_BASE); |
| 659 | BUG_ON(VMALLOC_END > CONSISTENT_BASE); |
| 660 | |
| 661 | BUILD_BUG_ON(TASK_SIZE > MODULES_VADDR); |
| 662 | BUG_ON(TASK_SIZE > MODULES_VADDR); |
| 663 | #endif |
| 664 | |
| 665 | #ifdef CONFIG_HIGHMEM |
| 666 | BUILD_BUG_ON(PKMAP_BASE + LAST_PKMAP * PAGE_SIZE > PAGE_OFFSET); |
| 667 | BUG_ON(PKMAP_BASE + LAST_PKMAP * PAGE_SIZE > PAGE_OFFSET); |
| 668 | #endif |
| 669 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 670 | if (PAGE_SIZE >= 16384 && num_physpages <= 128) { |
| 671 | extern int sysctl_overcommit_memory; |
| 672 | /* |
| 673 | * On a machine this small we won't get |
| 674 | * anywhere without overcommit, so turn |
| 675 | * it on by default. |
| 676 | */ |
| 677 | sysctl_overcommit_memory = OVERCOMMIT_ALWAYS; |
| 678 | } |
| 679 | } |
| 680 | |
| 681 | void free_initmem(void) |
| 682 | { |
Linus Walleij | bc58177 | 2009-09-15 17:30:37 +0100 | [diff] [blame] | 683 | #ifdef CONFIG_HAVE_TCM |
Linus Walleij | ea208f6 | 2010-05-26 07:37:57 +0100 | [diff] [blame] | 684 | extern char __tcm_start, __tcm_end; |
Linus Walleij | bc58177 | 2009-09-15 17:30:37 +0100 | [diff] [blame] | 685 | |
Linus Walleij | ea208f6 | 2010-05-26 07:37:57 +0100 | [diff] [blame] | 686 | totalram_pages += free_area(__phys_to_pfn(__pa(&__tcm_start)), |
| 687 | __phys_to_pfn(__pa(&__tcm_end)), |
Linus Walleij | bc58177 | 2009-09-15 17:30:37 +0100 | [diff] [blame] | 688 | "TCM link"); |
| 689 | #endif |
| 690 | |
Nicolas Pitre | 6db015e | 2008-09-17 14:50:42 -0400 | [diff] [blame] | 691 | if (!machine_is_integrator() && !machine_is_cintegrator()) |
Russell King | 37efe64 | 2008-12-01 11:53:07 +0000 | [diff] [blame] | 692 | totalram_pages += free_area(__phys_to_pfn(__pa(__init_begin)), |
| 693 | __phys_to_pfn(__pa(__init_end)), |
Nicolas Pitre | 6db015e | 2008-09-17 14:50:42 -0400 | [diff] [blame] | 694 | "init"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 695 | } |
| 696 | |
| 697 | #ifdef CONFIG_BLK_DEV_INITRD |
| 698 | |
| 699 | static int keep_initrd; |
| 700 | |
| 701 | void free_initrd_mem(unsigned long start, unsigned long end) |
| 702 | { |
| 703 | if (!keep_initrd) |
Nicolas Pitre | 6db015e | 2008-09-17 14:50:42 -0400 | [diff] [blame] | 704 | totalram_pages += free_area(__phys_to_pfn(__pa(start)), |
| 705 | __phys_to_pfn(__pa(end)), |
| 706 | "initrd"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 707 | } |
| 708 | |
| 709 | static int __init keepinitrd_setup(char *__unused) |
| 710 | { |
| 711 | keep_initrd = 1; |
| 712 | return 1; |
| 713 | } |
| 714 | |
| 715 | __setup("keepinitrd", keepinitrd_setup); |
| 716 | #endif |