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> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 21 | |
| 22 | #include <asm/mach-types.h> |
Russell King | 37efe64 | 2008-12-01 11:53:07 +0000 | [diff] [blame] | 23 | #include <asm/sections.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 24 | #include <asm/setup.h> |
Russell King | 74d02fb | 2006-04-04 21:47:43 +0100 | [diff] [blame] | 25 | #include <asm/sizes.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 26 | #include <asm/tlb.h> |
Fenkart/Bostandzhyan | db9ef1a | 2010-02-07 21:45:47 +0100 | [diff] [blame] | 27 | #include <asm/fixmap.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 28 | |
| 29 | #include <asm/mach/arch.h> |
| 30 | #include <asm/mach/map.h> |
| 31 | |
Russell King | 1b2e2b7 | 2006-08-21 17:06:38 +0100 | [diff] [blame] | 32 | #include "mm.h" |
| 33 | |
Russell King | 012d1f4 | 2008-09-06 10:57:03 +0100 | [diff] [blame] | 34 | static unsigned long phys_initrd_start __initdata = 0; |
| 35 | static unsigned long phys_initrd_size __initdata = 0; |
| 36 | |
Jeremy Kerr | 2b0d8c2 | 2010-01-11 23:17:34 +0100 | [diff] [blame] | 37 | static int __init early_initrd(char *p) |
Russell King | 012d1f4 | 2008-09-06 10:57:03 +0100 | [diff] [blame] | 38 | { |
| 39 | unsigned long start, size; |
Jeremy Kerr | 2b0d8c2 | 2010-01-11 23:17:34 +0100 | [diff] [blame] | 40 | char *endp; |
Russell King | 012d1f4 | 2008-09-06 10:57:03 +0100 | [diff] [blame] | 41 | |
Jeremy Kerr | 2b0d8c2 | 2010-01-11 23:17:34 +0100 | [diff] [blame] | 42 | start = memparse(p, &endp); |
| 43 | if (*endp == ',') { |
| 44 | size = memparse(endp + 1, NULL); |
Russell King | 012d1f4 | 2008-09-06 10:57:03 +0100 | [diff] [blame] | 45 | |
| 46 | phys_initrd_start = start; |
| 47 | phys_initrd_size = size; |
| 48 | } |
Jeremy Kerr | 2b0d8c2 | 2010-01-11 23:17:34 +0100 | [diff] [blame] | 49 | return 0; |
Russell King | 012d1f4 | 2008-09-06 10:57:03 +0100 | [diff] [blame] | 50 | } |
Jeremy Kerr | 2b0d8c2 | 2010-01-11 23:17:34 +0100 | [diff] [blame] | 51 | early_param("initrd", early_initrd); |
Russell King | 012d1f4 | 2008-09-06 10:57:03 +0100 | [diff] [blame] | 52 | |
| 53 | static int __init parse_tag_initrd(const struct tag *tag) |
| 54 | { |
| 55 | printk(KERN_WARNING "ATAG_INITRD is deprecated; " |
| 56 | "please update your bootloader.\n"); |
| 57 | phys_initrd_start = __virt_to_phys(tag->u.initrd.start); |
| 58 | phys_initrd_size = tag->u.initrd.size; |
| 59 | return 0; |
| 60 | } |
| 61 | |
| 62 | __tagtable(ATAG_INITRD, parse_tag_initrd); |
| 63 | |
| 64 | static int __init parse_tag_initrd2(const struct tag *tag) |
| 65 | { |
| 66 | phys_initrd_start = tag->u.initrd.start; |
| 67 | phys_initrd_size = tag->u.initrd.size; |
| 68 | return 0; |
| 69 | } |
| 70 | |
| 71 | __tagtable(ATAG_INITRD2, parse_tag_initrd2); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 72 | |
| 73 | /* |
Nicolas Pitre | 4b5f32c | 2008-10-06 13:24:40 -0400 | [diff] [blame] | 74 | * This keeps memory configuration data used by a couple memory |
| 75 | * initialization functions, as well as show_mem() for the skipping |
| 76 | * 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] | 77 | */ |
Nicolas Pitre | 4b5f32c | 2008-10-06 13:24:40 -0400 | [diff] [blame] | 78 | struct meminfo meminfo; |
Ray Lehtiniemi | 5e70982 | 2006-11-07 03:19:15 +0100 | [diff] [blame] | 79 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 80 | void show_mem(void) |
| 81 | { |
| 82 | int free = 0, total = 0, reserved = 0; |
Russell King | be37030 | 2010-05-07 17:40:33 +0100 | [diff] [blame] | 83 | int shared = 0, cached = 0, slab = 0, i; |
Ray Lehtiniemi | 5e70982 | 2006-11-07 03:19:15 +0100 | [diff] [blame] | 84 | struct meminfo * mi = &meminfo; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 85 | |
| 86 | printk("Mem-info:\n"); |
| 87 | show_free_areas(); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 88 | |
Russell King | be37030 | 2010-05-07 17:40:33 +0100 | [diff] [blame] | 89 | for_each_bank (i, mi) { |
| 90 | struct membank *bank = &mi->bank[i]; |
| 91 | unsigned int pfn1, pfn2; |
| 92 | struct page *page, *end; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 93 | |
Russell King | be37030 | 2010-05-07 17:40:33 +0100 | [diff] [blame] | 94 | pfn1 = bank_pfn_start(bank); |
| 95 | pfn2 = bank_pfn_end(bank); |
Ray Lehtiniemi | 5e70982 | 2006-11-07 03:19:15 +0100 | [diff] [blame] | 96 | |
Russell King | be37030 | 2010-05-07 17:40:33 +0100 | [diff] [blame] | 97 | page = pfn_to_page(pfn1); |
| 98 | end = pfn_to_page(pfn2 - 1) + 1; |
| 99 | |
| 100 | do { |
| 101 | total++; |
| 102 | if (PageReserved(page)) |
| 103 | reserved++; |
| 104 | else if (PageSwapCache(page)) |
| 105 | cached++; |
| 106 | else if (PageSlab(page)) |
| 107 | slab++; |
| 108 | else if (!page_count(page)) |
| 109 | free++; |
| 110 | else |
| 111 | shared += page_count(page) - 1; |
| 112 | page++; |
| 113 | } while (page < end); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 114 | } |
| 115 | |
| 116 | printk("%d pages of RAM\n", total); |
| 117 | printk("%d free pages\n", free); |
| 118 | printk("%d reserved pages\n", reserved); |
| 119 | printk("%d slab pages\n", slab); |
| 120 | printk("%d pages shared\n", shared); |
| 121 | printk("%d pages swap cached\n", cached); |
| 122 | } |
| 123 | |
Russell King | be37030 | 2010-05-07 17:40:33 +0100 | [diff] [blame] | 124 | static void __init find_limits(struct meminfo *mi, |
Russell King | dde5828 | 2009-08-15 12:36:00 +0100 | [diff] [blame] | 125 | unsigned long *min, unsigned long *max_low, unsigned long *max_high) |
| 126 | { |
| 127 | int i; |
| 128 | |
| 129 | *min = -1UL; |
| 130 | *max_low = *max_high = 0; |
| 131 | |
Russell King | be37030 | 2010-05-07 17:40:33 +0100 | [diff] [blame] | 132 | for_each_bank (i, mi) { |
Russell King | dde5828 | 2009-08-15 12:36:00 +0100 | [diff] [blame] | 133 | struct membank *bank = &mi->bank[i]; |
| 134 | unsigned long start, end; |
| 135 | |
| 136 | start = bank_pfn_start(bank); |
| 137 | end = bank_pfn_end(bank); |
| 138 | |
| 139 | if (*min > start) |
| 140 | *min = start; |
| 141 | if (*max_high < end) |
| 142 | *max_high = end; |
| 143 | if (bank->highmem) |
| 144 | continue; |
| 145 | if (*max_low < end) |
| 146 | *max_low = end; |
| 147 | } |
| 148 | } |
| 149 | |
Russell King | be37030 | 2010-05-07 17:40:33 +0100 | [diff] [blame] | 150 | static void __init arm_bootmem_init(struct meminfo *mi, |
Russell King | dde5828 | 2009-08-15 12:36:00 +0100 | [diff] [blame] | 151 | unsigned long start_pfn, unsigned long end_pfn) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 152 | { |
Russell King | 9007205 | 2005-10-28 14:48:37 +0100 | [diff] [blame] | 153 | unsigned int boot_pages; |
Russell King | 2778f62 | 2010-07-09 16:27:52 +0100 | [diff] [blame^] | 154 | phys_addr_t bitmap; |
Russell King | 9007205 | 2005-10-28 14:48:37 +0100 | [diff] [blame] | 155 | pg_data_t *pgdat; |
| 156 | int i; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 157 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 158 | /* |
Russell King | 2778f62 | 2010-07-09 16:27:52 +0100 | [diff] [blame^] | 159 | * Allocate the bootmem bitmap page. This must be in a region |
| 160 | * of memory which has already been mapped. |
Russell King | 9007205 | 2005-10-28 14:48:37 +0100 | [diff] [blame] | 161 | */ |
| 162 | boot_pages = bootmem_bootmap_pages(end_pfn - start_pfn); |
Russell King | 2778f62 | 2010-07-09 16:27:52 +0100 | [diff] [blame^] | 163 | bitmap = memblock_alloc_base(boot_pages << PAGE_SHIFT, L1_CACHE_BYTES, |
| 164 | __pfn_to_phys(end_pfn)); |
Russell King | 9007205 | 2005-10-28 14:48:37 +0100 | [diff] [blame] | 165 | |
| 166 | /* |
Russell King | be37030 | 2010-05-07 17:40:33 +0100 | [diff] [blame] | 167 | * Initialise the bootmem allocator, handing the |
Russell King | 9007205 | 2005-10-28 14:48:37 +0100 | [diff] [blame] | 168 | * memory banks over to bootmem. |
| 169 | */ |
Russell King | be37030 | 2010-05-07 17:40:33 +0100 | [diff] [blame] | 170 | node_set_online(0); |
| 171 | pgdat = NODE_DATA(0); |
Russell King | 2778f62 | 2010-07-09 16:27:52 +0100 | [diff] [blame^] | 172 | init_bootmem_node(pgdat, __phys_to_pfn(bitmap), start_pfn, end_pfn); |
Russell King | 9007205 | 2005-10-28 14:48:37 +0100 | [diff] [blame] | 173 | |
Russell King | be37030 | 2010-05-07 17:40:33 +0100 | [diff] [blame] | 174 | for_each_bank(i, mi) { |
Russell King | d2a38ef | 2008-10-01 16:56:15 +0100 | [diff] [blame] | 175 | struct membank *bank = &mi->bank[i]; |
Russell King | dde5828 | 2009-08-15 12:36:00 +0100 | [diff] [blame] | 176 | if (!bank->highmem) |
Russell King | be37030 | 2010-05-07 17:40:33 +0100 | [diff] [blame] | 177 | free_bootmem(bank_phys_start(bank), bank_phys_size(bank)); |
Russell King | d2a38ef | 2008-10-01 16:56:15 +0100 | [diff] [blame] | 178 | } |
Russell King | 9007205 | 2005-10-28 14:48:37 +0100 | [diff] [blame] | 179 | |
| 180 | /* |
Russell King | 2778f62 | 2010-07-09 16:27:52 +0100 | [diff] [blame^] | 181 | * Reserve the memblock reserved regions in bootmem. |
Russell King | 9007205 | 2005-10-28 14:48:37 +0100 | [diff] [blame] | 182 | */ |
Russell King | 2778f62 | 2010-07-09 16:27:52 +0100 | [diff] [blame^] | 183 | for (i = 0; i < memblock.reserved.cnt; i++) { |
| 184 | phys_addr_t start = memblock_start_pfn(&memblock.reserved, i); |
| 185 | if (start >= start_pfn && |
| 186 | memblock_end_pfn(&memblock.reserved, i) <= end_pfn) |
| 187 | reserve_bootmem_node(pgdat, __pfn_to_phys(start), |
| 188 | memblock_size_bytes(&memblock.reserved, i), |
| 189 | BOOTMEM_DEFAULT); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 190 | } |
Russell King | b7a69ac | 2008-10-01 16:58:32 +0100 | [diff] [blame] | 191 | } |
| 192 | |
Russell King | be37030 | 2010-05-07 17:40:33 +0100 | [diff] [blame] | 193 | static void __init arm_bootmem_free(struct meminfo *mi) |
Russell King | b7a69ac | 2008-10-01 16:58:32 +0100 | [diff] [blame] | 194 | { |
| 195 | unsigned long zone_size[MAX_NR_ZONES], zhole_size[MAX_NR_ZONES]; |
Russell King | dde5828 | 2009-08-15 12:36:00 +0100 | [diff] [blame] | 196 | unsigned long min, max_low, max_high; |
Russell King | b7a69ac | 2008-10-01 16:58:32 +0100 | [diff] [blame] | 197 | int i; |
| 198 | |
Russell King | be37030 | 2010-05-07 17:40:33 +0100 | [diff] [blame] | 199 | find_limits(mi, &min, &max_low, &max_high); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 200 | |
Russell King | 9007205 | 2005-10-28 14:48:37 +0100 | [diff] [blame] | 201 | /* |
Russell King | be37030 | 2010-05-07 17:40:33 +0100 | [diff] [blame] | 202 | * initialise the zones. |
Russell King | 9007205 | 2005-10-28 14:48:37 +0100 | [diff] [blame] | 203 | */ |
| 204 | memset(zone_size, 0, sizeof(zone_size)); |
Russell King | 9007205 | 2005-10-28 14:48:37 +0100 | [diff] [blame] | 205 | |
| 206 | /* |
Russell King | be37030 | 2010-05-07 17:40:33 +0100 | [diff] [blame] | 207 | * The memory size has already been determined. If we need |
| 208 | * to do anything fancy with the allocation of this memory |
| 209 | * to the zones, now is the time to do it. |
Russell King | 9007205 | 2005-10-28 14:48:37 +0100 | [diff] [blame] | 210 | */ |
Russell King | dde5828 | 2009-08-15 12:36:00 +0100 | [diff] [blame] | 211 | zone_size[0] = max_low - min; |
| 212 | #ifdef CONFIG_HIGHMEM |
| 213 | zone_size[ZONE_HIGHMEM] = max_high - max_low; |
| 214 | #endif |
Russell King | 9007205 | 2005-10-28 14:48:37 +0100 | [diff] [blame] | 215 | |
| 216 | /* |
Russell King | be37030 | 2010-05-07 17:40:33 +0100 | [diff] [blame] | 217 | * Calculate the size of the holes. |
| 218 | * holes = node_size - sum(bank_sizes) |
Russell King | 9007205 | 2005-10-28 14:48:37 +0100 | [diff] [blame] | 219 | */ |
Russell King | dde5828 | 2009-08-15 12:36:00 +0100 | [diff] [blame] | 220 | memcpy(zhole_size, zone_size, sizeof(zhole_size)); |
Russell King | be37030 | 2010-05-07 17:40:33 +0100 | [diff] [blame] | 221 | for_each_bank(i, mi) { |
Russell King | dde5828 | 2009-08-15 12:36:00 +0100 | [diff] [blame] | 222 | int idx = 0; |
| 223 | #ifdef CONFIG_HIGHMEM |
| 224 | if (mi->bank[i].highmem) |
| 225 | idx = ZONE_HIGHMEM; |
| 226 | #endif |
| 227 | zhole_size[idx] -= bank_pfn_size(&mi->bank[i]); |
| 228 | } |
Russell King | 9007205 | 2005-10-28 14:48:37 +0100 | [diff] [blame] | 229 | |
| 230 | /* |
| 231 | * Adjust the sizes according to any special requirements for |
| 232 | * this machine type. |
| 233 | */ |
Russell King | b65b478 | 2010-05-22 20:58:51 +0100 | [diff] [blame] | 234 | arch_adjust_zones(zone_size, zhole_size); |
Russell King | 9007205 | 2005-10-28 14:48:37 +0100 | [diff] [blame] | 235 | |
Russell King | be37030 | 2010-05-07 17:40:33 +0100 | [diff] [blame] | 236 | free_area_init_node(0, zone_size, min, zhole_size); |
Russell King | 9007205 | 2005-10-28 14:48:37 +0100 | [diff] [blame] | 237 | } |
| 238 | |
Russell King | b7cfda9 | 2009-09-07 15:06:42 +0100 | [diff] [blame] | 239 | #ifndef CONFIG_SPARSEMEM |
| 240 | int pfn_valid(unsigned long pfn) |
| 241 | { |
| 242 | struct meminfo *mi = &meminfo; |
| 243 | unsigned int left = 0, right = mi->nr_banks; |
| 244 | |
| 245 | do { |
| 246 | unsigned int mid = (right + left) / 2; |
| 247 | struct membank *bank = &mi->bank[mid]; |
| 248 | |
| 249 | if (pfn < bank_pfn_start(bank)) |
| 250 | right = mid; |
| 251 | else if (pfn >= bank_pfn_end(bank)) |
| 252 | left = mid + 1; |
| 253 | else |
| 254 | return 1; |
| 255 | } while (left < right); |
| 256 | return 0; |
| 257 | } |
| 258 | EXPORT_SYMBOL(pfn_valid); |
Russell King | 657e12f | 2009-10-29 17:06:17 +0000 | [diff] [blame] | 259 | |
Russell King | be37030 | 2010-05-07 17:40:33 +0100 | [diff] [blame] | 260 | static void arm_memory_present(struct meminfo *mi) |
Russell King | 657e12f | 2009-10-29 17:06:17 +0000 | [diff] [blame] | 261 | { |
| 262 | } |
| 263 | #else |
Russell King | be37030 | 2010-05-07 17:40:33 +0100 | [diff] [blame] | 264 | static void arm_memory_present(struct meminfo *mi) |
Russell King | 657e12f | 2009-10-29 17:06:17 +0000 | [diff] [blame] | 265 | { |
| 266 | int i; |
Russell King | be37030 | 2010-05-07 17:40:33 +0100 | [diff] [blame] | 267 | for_each_bank(i, mi) { |
Russell King | 657e12f | 2009-10-29 17:06:17 +0000 | [diff] [blame] | 268 | struct membank *bank = &mi->bank[i]; |
Russell King | be37030 | 2010-05-07 17:40:33 +0100 | [diff] [blame] | 269 | memory_present(0, bank_pfn_start(bank), bank_pfn_end(bank)); |
Russell King | 657e12f | 2009-10-29 17:06:17 +0000 | [diff] [blame] | 270 | } |
| 271 | } |
Russell King | b7cfda9 | 2009-09-07 15:06:42 +0100 | [diff] [blame] | 272 | #endif |
| 273 | |
Russell King | 2778f62 | 2010-07-09 16:27:52 +0100 | [diff] [blame^] | 274 | void __init arm_memblock_init(struct meminfo *mi) |
| 275 | { |
| 276 | int i; |
| 277 | |
| 278 | memblock_init(); |
| 279 | for (i = 0; i < mi->nr_banks; i++) |
| 280 | memblock_add(mi->bank[i].start, mi->bank[i].size); |
| 281 | |
| 282 | /* Register the kernel text, kernel data and initrd with memblock. */ |
| 283 | #ifdef CONFIG_XIP_KERNEL |
| 284 | memblock_reserve(__pa(_data), _end - _data); |
| 285 | #else |
| 286 | memblock_reserve(__pa(_stext), _end - _stext); |
| 287 | #endif |
| 288 | #ifdef CONFIG_BLK_DEV_INITRD |
| 289 | if (phys_initrd_size) { |
| 290 | memblock_reserve(phys_initrd_start, phys_initrd_size); |
| 291 | |
| 292 | /* Now convert initrd to virtual addresses */ |
| 293 | initrd_start = __phys_to_virt(phys_initrd_start); |
| 294 | initrd_end = initrd_start + phys_initrd_size; |
| 295 | } |
| 296 | #endif |
| 297 | |
| 298 | arm_mm_memblock_reserve(); |
| 299 | |
| 300 | memblock_analyze(); |
| 301 | memblock_dump_all(); |
| 302 | } |
| 303 | |
Russell King | 98c672c | 2010-05-22 18:18:57 +0100 | [diff] [blame] | 304 | void __init bootmem_init(struct machine_desc *mdesc) |
Russell King | 9007205 | 2005-10-28 14:48:37 +0100 | [diff] [blame] | 305 | { |
Nicolas Pitre | 4b5f32c | 2008-10-06 13:24:40 -0400 | [diff] [blame] | 306 | struct meminfo *mi = &meminfo; |
Russell King | dde5828 | 2009-08-15 12:36:00 +0100 | [diff] [blame] | 307 | unsigned long min, max_low, max_high; |
Russell King | 9007205 | 2005-10-28 14:48:37 +0100 | [diff] [blame] | 308 | |
Russell King | dde5828 | 2009-08-15 12:36:00 +0100 | [diff] [blame] | 309 | max_low = max_high = 0; |
| 310 | |
Russell King | be37030 | 2010-05-07 17:40:33 +0100 | [diff] [blame] | 311 | find_limits(mi, &min, &max_low, &max_high); |
| 312 | |
| 313 | arm_bootmem_init(mi, min, max_low); |
| 314 | |
Russell King | 98c672c | 2010-05-22 18:18:57 +0100 | [diff] [blame] | 315 | if (mdesc->reserve) |
| 316 | mdesc->reserve(); |
| 317 | |
Russell King | be37030 | 2010-05-07 17:40:33 +0100 | [diff] [blame] | 318 | /* |
Russell King | be37030 | 2010-05-07 17:40:33 +0100 | [diff] [blame] | 319 | * Sparsemem tries to allocate bootmem in memory_present(), |
| 320 | * so must be done after the fixed reservations |
| 321 | */ |
| 322 | arm_memory_present(mi); |
Russell King | 9007205 | 2005-10-28 14:48:37 +0100 | [diff] [blame] | 323 | |
Russell King | b7a69ac | 2008-10-01 16:58:32 +0100 | [diff] [blame] | 324 | /* |
| 325 | * sparse_init() needs the bootmem allocator up and running. |
| 326 | */ |
| 327 | sparse_init(); |
| 328 | |
| 329 | /* |
Russell King | be37030 | 2010-05-07 17:40:33 +0100 | [diff] [blame] | 330 | * Now free the memory - free_area_init_node needs |
Russell King | b7a69ac | 2008-10-01 16:58:32 +0100 | [diff] [blame] | 331 | * the sparse mem_map arrays initialized by sparse_init() |
| 332 | * for memmap_init_zone(), otherwise all PFNs are invalid. |
| 333 | */ |
Russell King | be37030 | 2010-05-07 17:40:33 +0100 | [diff] [blame] | 334 | arm_bootmem_free(mi); |
Russell King | b7a69ac | 2008-10-01 16:58:32 +0100 | [diff] [blame] | 335 | |
Russell King | dde5828 | 2009-08-15 12:36:00 +0100 | [diff] [blame] | 336 | high_memory = __va((max_low << PAGE_SHIFT) - 1) + 1; |
Russell King | 9007205 | 2005-10-28 14:48:37 +0100 | [diff] [blame] | 337 | |
| 338 | /* |
| 339 | * This doesn't seem to be used by the Linux memory manager any |
| 340 | * more, but is used by ll_rw_block. If we can get rid of it, we |
| 341 | * also get rid of some of the stuff above as well. |
| 342 | * |
| 343 | * Note: max_low_pfn and max_pfn reflect the number of _pages_ in |
| 344 | * the system, not the maximum PFN. |
| 345 | */ |
Russell King | dde5828 | 2009-08-15 12:36:00 +0100 | [diff] [blame] | 346 | max_low_pfn = max_low - PHYS_PFN_OFFSET; |
| 347 | max_pfn = max_high - PHYS_PFN_OFFSET; |
Russell King | 9007205 | 2005-10-28 14:48:37 +0100 | [diff] [blame] | 348 | } |
| 349 | |
Nicolas Pitre | 6db015e | 2008-09-17 14:50:42 -0400 | [diff] [blame] | 350 | 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] | 351 | { |
Nicolas Pitre | 6db015e | 2008-09-17 14:50:42 -0400 | [diff] [blame] | 352 | unsigned int pages = 0, size = (end - pfn) << (PAGE_SHIFT - 10); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 353 | |
Nicolas Pitre | 6db015e | 2008-09-17 14:50:42 -0400 | [diff] [blame] | 354 | for (; pfn < end; pfn++) { |
| 355 | struct page *page = pfn_to_page(pfn); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 356 | ClearPageReserved(page); |
Nick Piggin | 7835e98 | 2006-03-22 00:08:40 -0800 | [diff] [blame] | 357 | init_page_count(page); |
Nicolas Pitre | 6db015e | 2008-09-17 14:50:42 -0400 | [diff] [blame] | 358 | __free_page(page); |
| 359 | pages++; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 360 | } |
| 361 | |
| 362 | if (size && s) |
| 363 | printk(KERN_INFO "Freeing %s memory: %dK\n", s, size); |
Nicolas Pitre | 6db015e | 2008-09-17 14:50:42 -0400 | [diff] [blame] | 364 | |
| 365 | return pages; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 366 | } |
| 367 | |
Russell King | a013053 | 2005-06-27 14:16:47 +0100 | [diff] [blame] | 368 | static inline void |
Russell King | be37030 | 2010-05-07 17:40:33 +0100 | [diff] [blame] | 369 | free_memmap(unsigned long start_pfn, unsigned long end_pfn) |
Russell King | a013053 | 2005-06-27 14:16:47 +0100 | [diff] [blame] | 370 | { |
| 371 | struct page *start_pg, *end_pg; |
| 372 | unsigned long pg, pgend; |
| 373 | |
| 374 | /* |
| 375 | * Convert start_pfn/end_pfn to a struct page pointer. |
| 376 | */ |
Catalin Marinas | 3257f43 | 2009-10-06 17:57:22 +0100 | [diff] [blame] | 377 | start_pg = pfn_to_page(start_pfn - 1) + 1; |
Russell King | a013053 | 2005-06-27 14:16:47 +0100 | [diff] [blame] | 378 | end_pg = pfn_to_page(end_pfn); |
| 379 | |
| 380 | /* |
| 381 | * Convert to physical addresses, and |
| 382 | * round start upwards and end downwards. |
| 383 | */ |
| 384 | pg = PAGE_ALIGN(__pa(start_pg)); |
| 385 | pgend = __pa(end_pg) & PAGE_MASK; |
| 386 | |
| 387 | /* |
| 388 | * If there are free pages between these, |
| 389 | * free the section of the memmap array. |
| 390 | */ |
| 391 | if (pg < pgend) |
Russell King | be37030 | 2010-05-07 17:40:33 +0100 | [diff] [blame] | 392 | free_bootmem(pg, pgend - pg); |
Russell King | a013053 | 2005-06-27 14:16:47 +0100 | [diff] [blame] | 393 | } |
| 394 | |
| 395 | /* |
| 396 | * The mem_map array can get very big. Free the unused area of the memory map. |
| 397 | */ |
Russell King | be37030 | 2010-05-07 17:40:33 +0100 | [diff] [blame] | 398 | static void __init free_unused_memmap(struct meminfo *mi) |
Russell King | a013053 | 2005-06-27 14:16:47 +0100 | [diff] [blame] | 399 | { |
| 400 | unsigned long bank_start, prev_bank_end = 0; |
| 401 | unsigned int i; |
| 402 | |
| 403 | /* |
| 404 | * [FIXME] This relies on each bank being in address order. This |
| 405 | * may not be the case, especially if the user has provided the |
| 406 | * information on the command line. |
| 407 | */ |
Russell King | be37030 | 2010-05-07 17:40:33 +0100 | [diff] [blame] | 408 | for_each_bank(i, mi) { |
Russell King | d2a38ef | 2008-10-01 16:56:15 +0100 | [diff] [blame] | 409 | struct membank *bank = &mi->bank[i]; |
| 410 | |
| 411 | bank_start = bank_pfn_start(bank); |
Russell King | a013053 | 2005-06-27 14:16:47 +0100 | [diff] [blame] | 412 | if (bank_start < prev_bank_end) { |
| 413 | printk(KERN_ERR "MEM: unordered memory banks. " |
| 414 | "Not freeing memmap.\n"); |
| 415 | break; |
| 416 | } |
| 417 | |
| 418 | /* |
| 419 | * If we had a previous bank, and there is a space |
| 420 | * between the current bank and the previous, free it. |
| 421 | */ |
| 422 | if (prev_bank_end && prev_bank_end != bank_start) |
Russell King | be37030 | 2010-05-07 17:40:33 +0100 | [diff] [blame] | 423 | free_memmap(prev_bank_end, bank_start); |
Russell King | a013053 | 2005-06-27 14:16:47 +0100 | [diff] [blame] | 424 | |
Russell King | d2a38ef | 2008-10-01 16:56:15 +0100 | [diff] [blame] | 425 | prev_bank_end = bank_pfn_end(bank); |
Russell King | a013053 | 2005-06-27 14:16:47 +0100 | [diff] [blame] | 426 | } |
| 427 | } |
| 428 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 429 | /* |
| 430 | * mem_init() marks the free areas in the mem_map and tells us how much |
| 431 | * memory is free. This is done after various parts of the system have |
| 432 | * claimed their memory after the kernel image. |
| 433 | */ |
| 434 | void __init mem_init(void) |
| 435 | { |
Fenkart/Bostandzhyan | db9ef1a | 2010-02-07 21:45:47 +0100 | [diff] [blame] | 436 | unsigned long reserved_pages, free_pages; |
Russell King | be37030 | 2010-05-07 17:40:33 +0100 | [diff] [blame] | 437 | int i; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 438 | |
Nicolas Pitre | 3835f6c | 2008-09-17 15:21:55 -0400 | [diff] [blame] | 439 | max_mapnr = pfn_to_page(max_pfn + PHYS_PFN_OFFSET) - mem_map; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 440 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 441 | /* this will put all unused low memory onto the freelists */ |
Russell King | be37030 | 2010-05-07 17:40:33 +0100 | [diff] [blame] | 442 | free_unused_memmap(&meminfo); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 443 | |
Russell King | be37030 | 2010-05-07 17:40:33 +0100 | [diff] [blame] | 444 | totalram_pages += free_all_bootmem(); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 445 | |
| 446 | #ifdef CONFIG_SA1111 |
| 447 | /* 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] | 448 | totalram_pages += free_area(PHYS_PFN_OFFSET, |
| 449 | __phys_to_pfn(__pa(swapper_pg_dir)), NULL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 450 | #endif |
| 451 | |
Nicolas Pitre | 3835f6c | 2008-09-17 15:21:55 -0400 | [diff] [blame] | 452 | #ifdef CONFIG_HIGHMEM |
| 453 | /* set highmem page free */ |
Russell King | be37030 | 2010-05-07 17:40:33 +0100 | [diff] [blame] | 454 | for_each_bank (i, &meminfo) { |
| 455 | unsigned long start = bank_pfn_start(&meminfo.bank[i]); |
| 456 | unsigned long end = bank_pfn_end(&meminfo.bank[i]); |
| 457 | if (start >= max_low_pfn + PHYS_PFN_OFFSET) |
| 458 | totalhigh_pages += free_area(start, end, NULL); |
Nicolas Pitre | 3835f6c | 2008-09-17 15:21:55 -0400 | [diff] [blame] | 459 | } |
| 460 | totalram_pages += totalhigh_pages; |
| 461 | #endif |
| 462 | |
Fenkart/Bostandzhyan | db9ef1a | 2010-02-07 21:45:47 +0100 | [diff] [blame] | 463 | reserved_pages = free_pages = 0; |
| 464 | |
Russell King | be37030 | 2010-05-07 17:40:33 +0100 | [diff] [blame] | 465 | for_each_bank(i, &meminfo) { |
| 466 | struct membank *bank = &meminfo.bank[i]; |
| 467 | unsigned int pfn1, pfn2; |
| 468 | struct page *page, *end; |
Fenkart/Bostandzhyan | db9ef1a | 2010-02-07 21:45:47 +0100 | [diff] [blame] | 469 | |
Russell King | be37030 | 2010-05-07 17:40:33 +0100 | [diff] [blame] | 470 | pfn1 = bank_pfn_start(bank); |
| 471 | pfn2 = bank_pfn_end(bank); |
Fenkart/Bostandzhyan | db9ef1a | 2010-02-07 21:45:47 +0100 | [diff] [blame] | 472 | |
Russell King | be37030 | 2010-05-07 17:40:33 +0100 | [diff] [blame] | 473 | page = pfn_to_page(pfn1); |
| 474 | end = pfn_to_page(pfn2 - 1) + 1; |
Fenkart/Bostandzhyan | db9ef1a | 2010-02-07 21:45:47 +0100 | [diff] [blame] | 475 | |
Russell King | be37030 | 2010-05-07 17:40:33 +0100 | [diff] [blame] | 476 | do { |
| 477 | if (PageReserved(page)) |
| 478 | reserved_pages++; |
| 479 | else if (!page_count(page)) |
| 480 | free_pages++; |
| 481 | page++; |
| 482 | } while (page < end); |
Fenkart/Bostandzhyan | db9ef1a | 2010-02-07 21:45:47 +0100 | [diff] [blame] | 483 | } |
| 484 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 485 | /* |
| 486 | * Since our memory may not be contiguous, calculate the |
| 487 | * real number of pages we have in this system |
| 488 | */ |
| 489 | printk(KERN_INFO "Memory:"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 490 | num_physpages = 0; |
| 491 | for (i = 0; i < meminfo.nr_banks; i++) { |
Russell King | d2a38ef | 2008-10-01 16:56:15 +0100 | [diff] [blame] | 492 | num_physpages += bank_pfn_size(&meminfo.bank[i]); |
| 493 | printk(" %ldMB", bank_phys_size(&meminfo.bank[i]) >> 20); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 494 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 495 | printk(" = %luMB total\n", num_physpages >> (20 - PAGE_SHIFT)); |
Nicolas Pitre | 6db015e | 2008-09-17 14:50:42 -0400 | [diff] [blame] | 496 | |
Fenkart/Bostandzhyan | db9ef1a | 2010-02-07 21:45:47 +0100 | [diff] [blame] | 497 | printk(KERN_NOTICE "Memory: %luk/%luk available, %luk reserved, %luK highmem\n", |
| 498 | nr_free_pages() << (PAGE_SHIFT-10), |
| 499 | free_pages << (PAGE_SHIFT-10), |
| 500 | reserved_pages << (PAGE_SHIFT-10), |
Andreas Fenkart | 4b52940 | 2010-01-08 14:42:31 -0800 | [diff] [blame] | 501 | totalhigh_pages << (PAGE_SHIFT-10)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 502 | |
Fenkart/Bostandzhyan | db9ef1a | 2010-02-07 21:45:47 +0100 | [diff] [blame] | 503 | #define MLK(b, t) b, t, ((t) - (b)) >> 10 |
| 504 | #define MLM(b, t) b, t, ((t) - (b)) >> 20 |
| 505 | #define MLK_ROUNDUP(b, t) b, t, DIV_ROUND_UP(((t) - (b)), SZ_1K) |
| 506 | |
| 507 | printk(KERN_NOTICE "Virtual kernel memory layout:\n" |
| 508 | " vector : 0x%08lx - 0x%08lx (%4ld kB)\n" |
| 509 | " fixmap : 0x%08lx - 0x%08lx (%4ld kB)\n" |
Fenkart/Bostandzhyan | a7bd08c | 2010-02-07 21:46:33 +0100 | [diff] [blame] | 510 | #ifdef CONFIG_MMU |
| 511 | " DMA : 0x%08lx - 0x%08lx (%4ld MB)\n" |
| 512 | #endif |
Fenkart/Bostandzhyan | db9ef1a | 2010-02-07 21:45:47 +0100 | [diff] [blame] | 513 | " vmalloc : 0x%08lx - 0x%08lx (%4ld MB)\n" |
| 514 | " lowmem : 0x%08lx - 0x%08lx (%4ld MB)\n" |
| 515 | #ifdef CONFIG_HIGHMEM |
| 516 | " pkmap : 0x%08lx - 0x%08lx (%4ld MB)\n" |
| 517 | #endif |
| 518 | " modules : 0x%08lx - 0x%08lx (%4ld MB)\n" |
| 519 | " .init : 0x%p" " - 0x%p" " (%4d kB)\n" |
| 520 | " .text : 0x%p" " - 0x%p" " (%4d kB)\n" |
| 521 | " .data : 0x%p" " - 0x%p" " (%4d kB)\n", |
| 522 | |
| 523 | MLK(UL(CONFIG_VECTORS_BASE), UL(CONFIG_VECTORS_BASE) + |
| 524 | (PAGE_SIZE)), |
| 525 | MLK(FIXADDR_START, FIXADDR_TOP), |
Fenkart/Bostandzhyan | a7bd08c | 2010-02-07 21:46:33 +0100 | [diff] [blame] | 526 | #ifdef CONFIG_MMU |
| 527 | MLM(CONSISTENT_BASE, CONSISTENT_END), |
| 528 | #endif |
Fenkart/Bostandzhyan | c931b4f | 2010-02-07 21:47:17 +0100 | [diff] [blame] | 529 | MLM(VMALLOC_START, VMALLOC_END), |
Fenkart/Bostandzhyan | db9ef1a | 2010-02-07 21:45:47 +0100 | [diff] [blame] | 530 | MLM(PAGE_OFFSET, (unsigned long)high_memory), |
| 531 | #ifdef CONFIG_HIGHMEM |
| 532 | MLM(PKMAP_BASE, (PKMAP_BASE) + (LAST_PKMAP) * |
| 533 | (PAGE_SIZE)), |
| 534 | #endif |
| 535 | MLM(MODULES_VADDR, MODULES_END), |
| 536 | |
| 537 | MLK_ROUNDUP(__init_begin, __init_end), |
| 538 | MLK_ROUNDUP(_text, _etext), |
| 539 | MLK_ROUNDUP(_data, _edata)); |
| 540 | |
| 541 | #undef MLK |
| 542 | #undef MLM |
| 543 | #undef MLK_ROUNDUP |
| 544 | |
Fenkart/Bostandzhyan | a183927 | 2010-02-07 21:47:58 +0100 | [diff] [blame] | 545 | /* |
| 546 | * Check boundaries twice: Some fundamental inconsistencies can |
| 547 | * be detected at build time already. |
| 548 | */ |
| 549 | #ifdef CONFIG_MMU |
| 550 | BUILD_BUG_ON(VMALLOC_END > CONSISTENT_BASE); |
| 551 | BUG_ON(VMALLOC_END > CONSISTENT_BASE); |
| 552 | |
| 553 | BUILD_BUG_ON(TASK_SIZE > MODULES_VADDR); |
| 554 | BUG_ON(TASK_SIZE > MODULES_VADDR); |
| 555 | #endif |
| 556 | |
| 557 | #ifdef CONFIG_HIGHMEM |
| 558 | BUILD_BUG_ON(PKMAP_BASE + LAST_PKMAP * PAGE_SIZE > PAGE_OFFSET); |
| 559 | BUG_ON(PKMAP_BASE + LAST_PKMAP * PAGE_SIZE > PAGE_OFFSET); |
| 560 | #endif |
| 561 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 562 | if (PAGE_SIZE >= 16384 && num_physpages <= 128) { |
| 563 | extern int sysctl_overcommit_memory; |
| 564 | /* |
| 565 | * On a machine this small we won't get |
| 566 | * anywhere without overcommit, so turn |
| 567 | * it on by default. |
| 568 | */ |
| 569 | sysctl_overcommit_memory = OVERCOMMIT_ALWAYS; |
| 570 | } |
| 571 | } |
| 572 | |
| 573 | void free_initmem(void) |
| 574 | { |
Linus Walleij | bc58177 | 2009-09-15 17:30:37 +0100 | [diff] [blame] | 575 | #ifdef CONFIG_HAVE_TCM |
Linus Walleij | ea208f6 | 2010-05-26 07:37:57 +0100 | [diff] [blame] | 576 | extern char __tcm_start, __tcm_end; |
Linus Walleij | bc58177 | 2009-09-15 17:30:37 +0100 | [diff] [blame] | 577 | |
Linus Walleij | ea208f6 | 2010-05-26 07:37:57 +0100 | [diff] [blame] | 578 | totalram_pages += free_area(__phys_to_pfn(__pa(&__tcm_start)), |
| 579 | __phys_to_pfn(__pa(&__tcm_end)), |
Linus Walleij | bc58177 | 2009-09-15 17:30:37 +0100 | [diff] [blame] | 580 | "TCM link"); |
| 581 | #endif |
| 582 | |
Nicolas Pitre | 6db015e | 2008-09-17 14:50:42 -0400 | [diff] [blame] | 583 | if (!machine_is_integrator() && !machine_is_cintegrator()) |
Russell King | 37efe64 | 2008-12-01 11:53:07 +0000 | [diff] [blame] | 584 | totalram_pages += free_area(__phys_to_pfn(__pa(__init_begin)), |
| 585 | __phys_to_pfn(__pa(__init_end)), |
Nicolas Pitre | 6db015e | 2008-09-17 14:50:42 -0400 | [diff] [blame] | 586 | "init"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 587 | } |
| 588 | |
| 589 | #ifdef CONFIG_BLK_DEV_INITRD |
| 590 | |
| 591 | static int keep_initrd; |
| 592 | |
| 593 | void free_initrd_mem(unsigned long start, unsigned long end) |
| 594 | { |
| 595 | if (!keep_initrd) |
Nicolas Pitre | 6db015e | 2008-09-17 14:50:42 -0400 | [diff] [blame] | 596 | totalram_pages += free_area(__phys_to_pfn(__pa(start)), |
| 597 | __phys_to_pfn(__pa(end)), |
| 598 | "initrd"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 599 | } |
| 600 | |
| 601 | static int __init keepinitrd_setup(char *__unused) |
| 602 | { |
| 603 | keep_initrd = 1; |
| 604 | return 1; |
| 605 | } |
| 606 | |
| 607 | __setup("keepinitrd", keepinitrd_setup); |
| 608 | #endif |