Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1 | /* |
Johannes Weiner | 57cfc29 | 2008-07-23 21:28:00 -0700 | [diff] [blame] | 2 | * bootmem - A boot-time physical memory allocator and configurator |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3 | * |
| 4 | * Copyright (C) 1999 Ingo Molnar |
Johannes Weiner | 57cfc29 | 2008-07-23 21:28:00 -0700 | [diff] [blame] | 5 | * 1999 Kanoj Sarcar, SGI |
| 6 | * 2008 Johannes Weiner |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 7 | * |
Johannes Weiner | 57cfc29 | 2008-07-23 21:28:00 -0700 | [diff] [blame] | 8 | * Access to this subsystem has to be serialized externally (which is true |
| 9 | * for the boot process anyway). |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 10 | */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 11 | #include <linux/init.h> |
Franck Bui-Huu | bbc7b92 | 2006-09-25 23:31:07 -0700 | [diff] [blame] | 12 | #include <linux/pfn.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 13 | #include <linux/bootmem.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 14 | #include <linux/module.h> |
Franck Bui-Huu | e786e86 | 2006-09-25 23:31:06 -0700 | [diff] [blame] | 15 | |
| 16 | #include <asm/bug.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 17 | #include <asm/io.h> |
Heiko Carstens | dfd54cb | 2006-09-25 23:31:33 -0700 | [diff] [blame] | 18 | #include <asm/processor.h> |
Franck Bui-Huu | e786e86 | 2006-09-25 23:31:06 -0700 | [diff] [blame] | 19 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 20 | #include "internal.h" |
| 21 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 22 | unsigned long max_low_pfn; |
| 23 | unsigned long min_low_pfn; |
| 24 | unsigned long max_pfn; |
| 25 | |
Vivek Goyal | 92aa63a | 2005-06-25 14:58:18 -0700 | [diff] [blame] | 26 | #ifdef CONFIG_CRASH_DUMP |
| 27 | /* |
| 28 | * If we have booted due to a crash, max_pfn will be a very low value. We need |
| 29 | * to know the amount of memory that the previous kernel used. |
| 30 | */ |
| 31 | unsigned long saved_max_pfn; |
| 32 | #endif |
| 33 | |
Johannes Weiner | b61bfa3 | 2008-07-23 21:26:55 -0700 | [diff] [blame] | 34 | bootmem_data_t bootmem_node_data[MAX_NUMNODES] __initdata; |
| 35 | |
Johannes Weiner | 636cc40 | 2008-07-23 21:28:03 -0700 | [diff] [blame] | 36 | static struct list_head bdata_list __initdata = LIST_HEAD_INIT(bdata_list); |
| 37 | |
Johannes Weiner | 2e5237d | 2008-07-23 21:28:02 -0700 | [diff] [blame] | 38 | static int bootmem_debug; |
| 39 | |
| 40 | static int __init bootmem_debug_setup(char *buf) |
| 41 | { |
| 42 | bootmem_debug = 1; |
| 43 | return 0; |
| 44 | } |
| 45 | early_param("bootmem_debug", bootmem_debug_setup); |
| 46 | |
| 47 | #define bdebug(fmt, args...) ({ \ |
| 48 | if (unlikely(bootmem_debug)) \ |
| 49 | printk(KERN_INFO \ |
| 50 | "bootmem::%s " fmt, \ |
| 51 | __FUNCTION__, ## args); \ |
| 52 | }) |
| 53 | |
Johannes Weiner | df049a5 | 2008-07-23 21:28:02 -0700 | [diff] [blame] | 54 | static unsigned long __init bootmap_bytes(unsigned long pages) |
Johannes Weiner | 223e8dc | 2008-07-23 21:28:00 -0700 | [diff] [blame] | 55 | { |
Johannes Weiner | df049a5 | 2008-07-23 21:28:02 -0700 | [diff] [blame] | 56 | unsigned long bytes = (pages + 7) / 8; |
Johannes Weiner | 223e8dc | 2008-07-23 21:28:00 -0700 | [diff] [blame] | 57 | |
Johannes Weiner | df049a5 | 2008-07-23 21:28:02 -0700 | [diff] [blame] | 58 | return ALIGN(bytes, sizeof(long)); |
Johannes Weiner | 223e8dc | 2008-07-23 21:28:00 -0700 | [diff] [blame] | 59 | } |
| 60 | |
Johannes Weiner | a66fd7d | 2008-07-23 21:28:01 -0700 | [diff] [blame] | 61 | /** |
| 62 | * bootmem_bootmap_pages - calculate bitmap size in pages |
| 63 | * @pages: number of pages the bitmap has to represent |
| 64 | */ |
Franck Bui-Huu | f71bf0c | 2006-09-25 23:31:08 -0700 | [diff] [blame] | 65 | unsigned long __init bootmem_bootmap_pages(unsigned long pages) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 66 | { |
Johannes Weiner | df049a5 | 2008-07-23 21:28:02 -0700 | [diff] [blame] | 67 | unsigned long bytes = bootmap_bytes(pages); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 68 | |
Johannes Weiner | df049a5 | 2008-07-23 21:28:02 -0700 | [diff] [blame] | 69 | return PAGE_ALIGN(bytes) >> PAGE_SHIFT; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 70 | } |
Franck Bui-Huu | f71bf0c | 2006-09-25 23:31:08 -0700 | [diff] [blame] | 71 | |
KAMEZAWA Hiroyuki | 679bc9f | 2006-03-27 01:15:58 -0800 | [diff] [blame] | 72 | /* |
| 73 | * link bdata in order |
| 74 | */ |
Franck Bui-Huu | 69d49e6 | 2006-09-25 23:31:04 -0700 | [diff] [blame] | 75 | static void __init link_bootmem(bootmem_data_t *bdata) |
KAMEZAWA Hiroyuki | 679bc9f | 2006-03-27 01:15:58 -0800 | [diff] [blame] | 76 | { |
Johannes Weiner | 636cc40 | 2008-07-23 21:28:03 -0700 | [diff] [blame] | 77 | struct list_head *iter; |
Franck Bui-Huu | f71bf0c | 2006-09-25 23:31:08 -0700 | [diff] [blame] | 78 | |
Johannes Weiner | 636cc40 | 2008-07-23 21:28:03 -0700 | [diff] [blame] | 79 | list_for_each(iter, &bdata_list) { |
| 80 | bootmem_data_t *ent; |
| 81 | |
| 82 | ent = list_entry(iter, bootmem_data_t, list); |
| 83 | if (bdata->node_boot_start < ent->node_boot_start) |
| 84 | break; |
KAMEZAWA Hiroyuki | 679bc9f | 2006-03-27 01:15:58 -0800 | [diff] [blame] | 85 | } |
Johannes Weiner | 636cc40 | 2008-07-23 21:28:03 -0700 | [diff] [blame] | 86 | list_add_tail(&bdata->list, iter); |
KAMEZAWA Hiroyuki | 679bc9f | 2006-03-27 01:15:58 -0800 | [diff] [blame] | 87 | } |
| 88 | |
Franck Bui-Huu | bbc7b92 | 2006-09-25 23:31:07 -0700 | [diff] [blame] | 89 | /* |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 90 | * Called once to set up the allocator itself. |
| 91 | */ |
Johannes Weiner | 8ae0446 | 2008-07-23 21:26:59 -0700 | [diff] [blame] | 92 | static unsigned long __init init_bootmem_core(bootmem_data_t *bdata, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 93 | unsigned long mapstart, unsigned long start, unsigned long end) |
| 94 | { |
Franck Bui-Huu | bbc7b92 | 2006-09-25 23:31:07 -0700 | [diff] [blame] | 95 | unsigned long mapsize; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 96 | |
Mel Gorman | 2dbb51c | 2008-07-23 21:26:52 -0700 | [diff] [blame] | 97 | mminit_validate_memmodel_limits(&start, &end); |
Franck Bui-Huu | bbc7b92 | 2006-09-25 23:31:07 -0700 | [diff] [blame] | 98 | bdata->node_bootmem_map = phys_to_virt(PFN_PHYS(mapstart)); |
| 99 | bdata->node_boot_start = PFN_PHYS(start); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 100 | bdata->node_low_pfn = end; |
KAMEZAWA Hiroyuki | 679bc9f | 2006-03-27 01:15:58 -0800 | [diff] [blame] | 101 | link_bootmem(bdata); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 102 | |
| 103 | /* |
| 104 | * Initially all pages are reserved - setup_arch() has to |
| 105 | * register free RAM areas explicitly. |
| 106 | */ |
Johannes Weiner | df049a5 | 2008-07-23 21:28:02 -0700 | [diff] [blame] | 107 | mapsize = bootmap_bytes(end - start); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 108 | memset(bdata->node_bootmem_map, 0xff, mapsize); |
| 109 | |
Johannes Weiner | 2e5237d | 2008-07-23 21:28:02 -0700 | [diff] [blame] | 110 | bdebug("nid=%td start=%lx map=%lx end=%lx mapsize=%lx\n", |
| 111 | bdata - bootmem_node_data, start, mapstart, end, mapsize); |
| 112 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 113 | return mapsize; |
| 114 | } |
| 115 | |
Johannes Weiner | a66fd7d | 2008-07-23 21:28:01 -0700 | [diff] [blame] | 116 | /** |
| 117 | * init_bootmem_node - register a node as boot memory |
| 118 | * @pgdat: node to register |
| 119 | * @freepfn: pfn where the bitmap for this node is to be placed |
| 120 | * @startpfn: first pfn on the node |
| 121 | * @endpfn: first pfn after the node |
| 122 | * |
| 123 | * Returns the number of bytes needed to hold the bitmap for this node. |
| 124 | */ |
Johannes Weiner | 223e8dc | 2008-07-23 21:28:00 -0700 | [diff] [blame] | 125 | unsigned long __init init_bootmem_node(pg_data_t *pgdat, unsigned long freepfn, |
| 126 | unsigned long startpfn, unsigned long endpfn) |
| 127 | { |
| 128 | return init_bootmem_core(pgdat->bdata, freepfn, startpfn, endpfn); |
| 129 | } |
| 130 | |
Johannes Weiner | a66fd7d | 2008-07-23 21:28:01 -0700 | [diff] [blame] | 131 | /** |
| 132 | * init_bootmem - register boot memory |
| 133 | * @start: pfn where the bitmap is to be placed |
| 134 | * @pages: number of available physical pages |
| 135 | * |
| 136 | * Returns the number of bytes needed to hold the bitmap. |
| 137 | */ |
Johannes Weiner | 223e8dc | 2008-07-23 21:28:00 -0700 | [diff] [blame] | 138 | unsigned long __init init_bootmem(unsigned long start, unsigned long pages) |
| 139 | { |
| 140 | max_low_pfn = pages; |
| 141 | min_low_pfn = start; |
| 142 | return init_bootmem_core(NODE_DATA(0)->bdata, start, 0, pages); |
| 143 | } |
| 144 | |
| 145 | static unsigned long __init free_all_bootmem_core(bootmem_data_t *bdata) |
| 146 | { |
Johannes Weiner | 41546c1 | 2008-07-23 21:28:03 -0700 | [diff] [blame] | 147 | int aligned; |
Johannes Weiner | 223e8dc | 2008-07-23 21:28:00 -0700 | [diff] [blame] | 148 | struct page *page; |
Johannes Weiner | 41546c1 | 2008-07-23 21:28:03 -0700 | [diff] [blame] | 149 | unsigned long start, end, pages, count = 0; |
Johannes Weiner | 223e8dc | 2008-07-23 21:28:00 -0700 | [diff] [blame] | 150 | |
Johannes Weiner | 41546c1 | 2008-07-23 21:28:03 -0700 | [diff] [blame] | 151 | if (!bdata->node_bootmem_map) |
| 152 | return 0; |
Johannes Weiner | 223e8dc | 2008-07-23 21:28:00 -0700 | [diff] [blame] | 153 | |
Johannes Weiner | 41546c1 | 2008-07-23 21:28:03 -0700 | [diff] [blame] | 154 | start = PFN_DOWN(bdata->node_boot_start); |
| 155 | end = bdata->node_low_pfn; |
| 156 | |
Johannes Weiner | 223e8dc | 2008-07-23 21:28:00 -0700 | [diff] [blame] | 157 | /* |
Johannes Weiner | 41546c1 | 2008-07-23 21:28:03 -0700 | [diff] [blame] | 158 | * If the start is aligned to the machines wordsize, we might |
| 159 | * be able to free pages in bulks of that order. |
Johannes Weiner | 223e8dc | 2008-07-23 21:28:00 -0700 | [diff] [blame] | 160 | */ |
Johannes Weiner | 41546c1 | 2008-07-23 21:28:03 -0700 | [diff] [blame] | 161 | aligned = !(start & (BITS_PER_LONG - 1)); |
Johannes Weiner | 223e8dc | 2008-07-23 21:28:00 -0700 | [diff] [blame] | 162 | |
Johannes Weiner | 41546c1 | 2008-07-23 21:28:03 -0700 | [diff] [blame] | 163 | bdebug("nid=%td start=%lx end=%lx aligned=%d\n", |
| 164 | bdata - bootmem_node_data, start, end, aligned); |
Johannes Weiner | 223e8dc | 2008-07-23 21:28:00 -0700 | [diff] [blame] | 165 | |
Johannes Weiner | 41546c1 | 2008-07-23 21:28:03 -0700 | [diff] [blame] | 166 | while (start < end) { |
| 167 | unsigned long *map, idx, vec; |
Johannes Weiner | 223e8dc | 2008-07-23 21:28:00 -0700 | [diff] [blame] | 168 | |
Johannes Weiner | 41546c1 | 2008-07-23 21:28:03 -0700 | [diff] [blame] | 169 | map = bdata->node_bootmem_map; |
| 170 | idx = start - PFN_DOWN(bdata->node_boot_start); |
| 171 | vec = ~map[idx / BITS_PER_LONG]; |
| 172 | |
| 173 | if (aligned && vec == ~0UL && start + BITS_PER_LONG < end) { |
| 174 | int order = ilog2(BITS_PER_LONG); |
| 175 | |
| 176 | __free_pages_bootmem(pfn_to_page(start), order); |
Johannes Weiner | 223e8dc | 2008-07-23 21:28:00 -0700 | [diff] [blame] | 177 | count += BITS_PER_LONG; |
Johannes Weiner | 223e8dc | 2008-07-23 21:28:00 -0700 | [diff] [blame] | 178 | } else { |
Johannes Weiner | 41546c1 | 2008-07-23 21:28:03 -0700 | [diff] [blame] | 179 | unsigned long off = 0; |
| 180 | |
| 181 | while (vec && off < BITS_PER_LONG) { |
| 182 | if (vec & 1) { |
| 183 | page = pfn_to_page(start + off); |
| 184 | __free_pages_bootmem(page, 0); |
| 185 | count++; |
| 186 | } |
| 187 | vec >>= 1; |
| 188 | off++; |
| 189 | } |
Johannes Weiner | 223e8dc | 2008-07-23 21:28:00 -0700 | [diff] [blame] | 190 | } |
Johannes Weiner | 41546c1 | 2008-07-23 21:28:03 -0700 | [diff] [blame] | 191 | start += BITS_PER_LONG; |
Johannes Weiner | 223e8dc | 2008-07-23 21:28:00 -0700 | [diff] [blame] | 192 | } |
| 193 | |
Johannes Weiner | 223e8dc | 2008-07-23 21:28:00 -0700 | [diff] [blame] | 194 | page = virt_to_page(bdata->node_bootmem_map); |
Johannes Weiner | df049a5 | 2008-07-23 21:28:02 -0700 | [diff] [blame] | 195 | pages = bdata->node_low_pfn - PFN_DOWN(bdata->node_boot_start); |
Johannes Weiner | 41546c1 | 2008-07-23 21:28:03 -0700 | [diff] [blame] | 196 | pages = bootmem_bootmap_pages(pages); |
| 197 | count += pages; |
| 198 | while (pages--) |
| 199 | __free_pages_bootmem(page++, 0); |
Johannes Weiner | 223e8dc | 2008-07-23 21:28:00 -0700 | [diff] [blame] | 200 | |
Johannes Weiner | 2e5237d | 2008-07-23 21:28:02 -0700 | [diff] [blame] | 201 | bdebug("nid=%td released=%lx\n", bdata - bootmem_node_data, count); |
| 202 | |
Johannes Weiner | 223e8dc | 2008-07-23 21:28:00 -0700 | [diff] [blame] | 203 | return count; |
| 204 | } |
| 205 | |
Johannes Weiner | a66fd7d | 2008-07-23 21:28:01 -0700 | [diff] [blame] | 206 | /** |
| 207 | * free_all_bootmem_node - release a node's free pages to the buddy allocator |
| 208 | * @pgdat: node to be released |
| 209 | * |
| 210 | * Returns the number of pages actually released. |
| 211 | */ |
Johannes Weiner | 223e8dc | 2008-07-23 21:28:00 -0700 | [diff] [blame] | 212 | unsigned long __init free_all_bootmem_node(pg_data_t *pgdat) |
| 213 | { |
| 214 | register_page_bootmem_info_node(pgdat); |
| 215 | return free_all_bootmem_core(pgdat->bdata); |
| 216 | } |
| 217 | |
Johannes Weiner | a66fd7d | 2008-07-23 21:28:01 -0700 | [diff] [blame] | 218 | /** |
| 219 | * free_all_bootmem - release free pages to the buddy allocator |
| 220 | * |
| 221 | * Returns the number of pages actually released. |
| 222 | */ |
Johannes Weiner | 223e8dc | 2008-07-23 21:28:00 -0700 | [diff] [blame] | 223 | unsigned long __init free_all_bootmem(void) |
| 224 | { |
| 225 | return free_all_bootmem_core(NODE_DATA(0)->bdata); |
| 226 | } |
| 227 | |
Johannes Weiner | d747fa4 | 2008-07-23 21:28:05 -0700 | [diff] [blame^] | 228 | static void __init __free(bootmem_data_t *bdata, |
| 229 | unsigned long sidx, unsigned long eidx) |
| 230 | { |
| 231 | unsigned long idx; |
| 232 | |
| 233 | bdebug("nid=%td start=%lx end=%lx\n", bdata - bootmem_node_data, |
| 234 | sidx + PFN_DOWN(bdata->node_boot_start), |
| 235 | eidx + PFN_DOWN(bdata->node_boot_start)); |
| 236 | |
| 237 | for (idx = sidx; idx < eidx; idx++) |
| 238 | if (!test_and_clear_bit(idx, bdata->node_bootmem_map)) |
| 239 | BUG(); |
| 240 | } |
| 241 | |
| 242 | static int __init __reserve(bootmem_data_t *bdata, unsigned long sidx, |
| 243 | unsigned long eidx, int flags) |
| 244 | { |
| 245 | unsigned long idx; |
| 246 | int exclusive = flags & BOOTMEM_EXCLUSIVE; |
| 247 | |
| 248 | bdebug("nid=%td start=%lx end=%lx flags=%x\n", |
| 249 | bdata - bootmem_node_data, |
| 250 | sidx + PFN_DOWN(bdata->node_boot_start), |
| 251 | eidx + PFN_DOWN(bdata->node_boot_start), |
| 252 | flags); |
| 253 | |
| 254 | for (idx = sidx; idx < eidx; idx++) |
| 255 | if (test_and_set_bit(idx, bdata->node_bootmem_map)) { |
| 256 | if (exclusive) { |
| 257 | __free(bdata, sidx, idx); |
| 258 | return -EBUSY; |
| 259 | } |
| 260 | bdebug("silent double reserve of PFN %lx\n", |
| 261 | idx + PFN_DOWN(bdata->node_boot_start)); |
| 262 | } |
| 263 | return 0; |
| 264 | } |
| 265 | |
Johannes Weiner | 223e8dc | 2008-07-23 21:28:00 -0700 | [diff] [blame] | 266 | static void __init free_bootmem_core(bootmem_data_t *bdata, unsigned long addr, |
| 267 | unsigned long size) |
| 268 | { |
| 269 | unsigned long sidx, eidx; |
| 270 | unsigned long i; |
| 271 | |
| 272 | BUG_ON(!size); |
| 273 | |
| 274 | /* out range */ |
| 275 | if (addr + size < bdata->node_boot_start || |
| 276 | PFN_DOWN(addr) > bdata->node_low_pfn) |
| 277 | return; |
| 278 | /* |
| 279 | * round down end of usable mem, partially free pages are |
| 280 | * considered reserved. |
| 281 | */ |
| 282 | |
Johannes Weiner | 5f2809e | 2008-07-23 21:28:05 -0700 | [diff] [blame] | 283 | if (addr >= bdata->node_boot_start && |
| 284 | PFN_DOWN(addr - bdata->node_boot_start) < bdata->hint_idx) |
| 285 | bdata->hint_idx = PFN_DOWN(addr - bdata->node_boot_start); |
Johannes Weiner | 223e8dc | 2008-07-23 21:28:00 -0700 | [diff] [blame] | 286 | |
| 287 | /* |
| 288 | * Round up to index to the range. |
| 289 | */ |
| 290 | if (PFN_UP(addr) > PFN_DOWN(bdata->node_boot_start)) |
| 291 | sidx = PFN_UP(addr) - PFN_DOWN(bdata->node_boot_start); |
| 292 | else |
| 293 | sidx = 0; |
| 294 | |
| 295 | eidx = PFN_DOWN(addr + size - bdata->node_boot_start); |
| 296 | if (eidx > bdata->node_low_pfn - PFN_DOWN(bdata->node_boot_start)) |
| 297 | eidx = bdata->node_low_pfn - PFN_DOWN(bdata->node_boot_start); |
| 298 | |
Johannes Weiner | d747fa4 | 2008-07-23 21:28:05 -0700 | [diff] [blame^] | 299 | __free(bdata, sidx, eidx); |
Johannes Weiner | 223e8dc | 2008-07-23 21:28:00 -0700 | [diff] [blame] | 300 | } |
| 301 | |
Johannes Weiner | a66fd7d | 2008-07-23 21:28:01 -0700 | [diff] [blame] | 302 | /** |
| 303 | * free_bootmem_node - mark a page range as usable |
| 304 | * @pgdat: node the range resides on |
| 305 | * @physaddr: starting address of the range |
| 306 | * @size: size of the range in bytes |
| 307 | * |
| 308 | * Partial pages will be considered reserved and left as they are. |
| 309 | * |
| 310 | * Only physical pages that actually reside on @pgdat are marked. |
| 311 | */ |
Johannes Weiner | 223e8dc | 2008-07-23 21:28:00 -0700 | [diff] [blame] | 312 | void __init free_bootmem_node(pg_data_t *pgdat, unsigned long physaddr, |
| 313 | unsigned long size) |
| 314 | { |
| 315 | free_bootmem_core(pgdat->bdata, physaddr, size); |
| 316 | } |
| 317 | |
Johannes Weiner | a66fd7d | 2008-07-23 21:28:01 -0700 | [diff] [blame] | 318 | /** |
| 319 | * free_bootmem - mark a page range as usable |
| 320 | * @addr: starting address of the range |
| 321 | * @size: size of the range in bytes |
| 322 | * |
| 323 | * Partial pages will be considered reserved and left as they are. |
| 324 | * |
| 325 | * All physical pages within the range are marked, no matter what |
| 326 | * node they reside on. |
| 327 | */ |
Johannes Weiner | 223e8dc | 2008-07-23 21:28:00 -0700 | [diff] [blame] | 328 | void __init free_bootmem(unsigned long addr, unsigned long size) |
| 329 | { |
| 330 | bootmem_data_t *bdata; |
| 331 | list_for_each_entry(bdata, &bdata_list, list) |
| 332 | free_bootmem_core(bdata, addr, size); |
| 333 | } |
| 334 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 335 | /* |
| 336 | * Marks a particular physical memory range as unallocatable. Usable RAM |
| 337 | * might be used for boot-time allocations - or it might get added |
| 338 | * to the free page pool later on. |
| 339 | */ |
Yinghai Lu | a5645a6 | 2008-03-18 12:49:12 -0700 | [diff] [blame] | 340 | static int __init can_reserve_bootmem_core(bootmem_data_t *bdata, |
Bernhard Walle | 72a7fe3 | 2008-02-07 00:15:17 -0800 | [diff] [blame] | 341 | unsigned long addr, unsigned long size, int flags) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 342 | { |
Franck Bui-Huu | bbc7b92 | 2006-09-25 23:31:07 -0700 | [diff] [blame] | 343 | unsigned long sidx, eidx; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 344 | unsigned long i; |
Yinghai Lu | a5645a6 | 2008-03-18 12:49:12 -0700 | [diff] [blame] | 345 | |
| 346 | BUG_ON(!size); |
| 347 | |
| 348 | /* out of range, don't hold other */ |
| 349 | if (addr + size < bdata->node_boot_start || |
| 350 | PFN_DOWN(addr) > bdata->node_low_pfn) |
| 351 | return 0; |
Franck Bui-Huu | bbc7b92 | 2006-09-25 23:31:07 -0700 | [diff] [blame] | 352 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 353 | /* |
Yinghai Lu | a5645a6 | 2008-03-18 12:49:12 -0700 | [diff] [blame] | 354 | * Round up to index to the range. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 355 | */ |
Yinghai Lu | a5645a6 | 2008-03-18 12:49:12 -0700 | [diff] [blame] | 356 | if (addr > bdata->node_boot_start) |
| 357 | sidx= PFN_DOWN(addr - bdata->node_boot_start); |
| 358 | else |
| 359 | sidx = 0; |
Franck Bui-Huu | bbc7b92 | 2006-09-25 23:31:07 -0700 | [diff] [blame] | 360 | |
Franck Bui-Huu | bbc7b92 | 2006-09-25 23:31:07 -0700 | [diff] [blame] | 361 | eidx = PFN_UP(addr + size - bdata->node_boot_start); |
Yinghai Lu | a5645a6 | 2008-03-18 12:49:12 -0700 | [diff] [blame] | 362 | if (eidx > bdata->node_low_pfn - PFN_DOWN(bdata->node_boot_start)) |
| 363 | eidx = bdata->node_low_pfn - PFN_DOWN(bdata->node_boot_start); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 364 | |
Yinghai Lu | a5645a6 | 2008-03-18 12:49:12 -0700 | [diff] [blame] | 365 | for (i = sidx; i < eidx; i++) { |
| 366 | if (test_bit(i, bdata->node_bootmem_map)) { |
| 367 | if (flags & BOOTMEM_EXCLUSIVE) |
| 368 | return -EBUSY; |
| 369 | } |
| 370 | } |
| 371 | |
| 372 | return 0; |
| 373 | |
| 374 | } |
| 375 | |
| 376 | static void __init reserve_bootmem_core(bootmem_data_t *bdata, |
| 377 | unsigned long addr, unsigned long size, int flags) |
| 378 | { |
| 379 | unsigned long sidx, eidx; |
| 380 | unsigned long i; |
| 381 | |
| 382 | BUG_ON(!size); |
| 383 | |
| 384 | /* out of range */ |
| 385 | if (addr + size < bdata->node_boot_start || |
| 386 | PFN_DOWN(addr) > bdata->node_low_pfn) |
| 387 | return; |
| 388 | |
| 389 | /* |
| 390 | * Round up to index to the range. |
| 391 | */ |
| 392 | if (addr > bdata->node_boot_start) |
| 393 | sidx= PFN_DOWN(addr - bdata->node_boot_start); |
| 394 | else |
| 395 | sidx = 0; |
| 396 | |
| 397 | eidx = PFN_UP(addr + size - bdata->node_boot_start); |
| 398 | if (eidx > bdata->node_low_pfn - PFN_DOWN(bdata->node_boot_start)) |
| 399 | eidx = bdata->node_low_pfn - PFN_DOWN(bdata->node_boot_start); |
| 400 | |
Johannes Weiner | d747fa4 | 2008-07-23 21:28:05 -0700 | [diff] [blame^] | 401 | return __reserve(bdata, sidx, eidx, flags); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 402 | } |
| 403 | |
Johannes Weiner | a66fd7d | 2008-07-23 21:28:01 -0700 | [diff] [blame] | 404 | /** |
| 405 | * reserve_bootmem_node - mark a page range as reserved |
| 406 | * @pgdat: node the range resides on |
| 407 | * @physaddr: starting address of the range |
| 408 | * @size: size of the range in bytes |
| 409 | * @flags: reservation flags (see linux/bootmem.h) |
| 410 | * |
| 411 | * Partial pages will be reserved. |
| 412 | * |
| 413 | * Only physical pages that actually reside on @pgdat are marked. |
| 414 | */ |
Johannes Weiner | 223e8dc | 2008-07-23 21:28:00 -0700 | [diff] [blame] | 415 | int __init reserve_bootmem_node(pg_data_t *pgdat, unsigned long physaddr, |
| 416 | unsigned long size, int flags) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 417 | { |
Johannes Weiner | 223e8dc | 2008-07-23 21:28:00 -0700 | [diff] [blame] | 418 | int ret; |
Franck Bui-Huu | bbc7b92 | 2006-09-25 23:31:07 -0700 | [diff] [blame] | 419 | |
Johannes Weiner | 223e8dc | 2008-07-23 21:28:00 -0700 | [diff] [blame] | 420 | ret = can_reserve_bootmem_core(pgdat->bdata, physaddr, size, flags); |
| 421 | if (ret < 0) |
| 422 | return -ENOMEM; |
| 423 | reserve_bootmem_core(pgdat->bdata, physaddr, size, flags); |
| 424 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 425 | } |
| 426 | |
Johannes Weiner | 223e8dc | 2008-07-23 21:28:00 -0700 | [diff] [blame] | 427 | #ifndef CONFIG_HAVE_ARCH_BOOTMEM_NODE |
Johannes Weiner | a66fd7d | 2008-07-23 21:28:01 -0700 | [diff] [blame] | 428 | /** |
| 429 | * reserve_bootmem - mark a page range as usable |
| 430 | * @addr: starting address of the range |
| 431 | * @size: size of the range in bytes |
| 432 | * @flags: reservation flags (see linux/bootmem.h) |
| 433 | * |
| 434 | * Partial pages will be reserved. |
| 435 | * |
| 436 | * All physical pages within the range are marked, no matter what |
| 437 | * node they reside on. |
| 438 | */ |
Johannes Weiner | 223e8dc | 2008-07-23 21:28:00 -0700 | [diff] [blame] | 439 | int __init reserve_bootmem(unsigned long addr, unsigned long size, |
| 440 | int flags) |
| 441 | { |
| 442 | bootmem_data_t *bdata; |
| 443 | int ret; |
| 444 | |
| 445 | list_for_each_entry(bdata, &bdata_list, list) { |
| 446 | ret = can_reserve_bootmem_core(bdata, addr, size, flags); |
| 447 | if (ret < 0) |
| 448 | return ret; |
| 449 | } |
| 450 | list_for_each_entry(bdata, &bdata_list, list) |
| 451 | reserve_bootmem_core(bdata, addr, size, flags); |
| 452 | |
| 453 | return 0; |
| 454 | } |
| 455 | #endif /* !CONFIG_HAVE_ARCH_BOOTMEM_NODE */ |
| 456 | |
Johannes Weiner | 5f2809e | 2008-07-23 21:28:05 -0700 | [diff] [blame] | 457 | static void * __init alloc_bootmem_core(struct bootmem_data *bdata, |
| 458 | unsigned long size, unsigned long align, |
| 459 | unsigned long goal, unsigned long limit) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 460 | { |
Johannes Weiner | 5f2809e | 2008-07-23 21:28:05 -0700 | [diff] [blame] | 461 | unsigned long min, max, start, sidx, midx, step; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 462 | |
Johannes Weiner | 5f2809e | 2008-07-23 21:28:05 -0700 | [diff] [blame] | 463 | BUG_ON(!size); |
| 464 | BUG_ON(align & (align - 1)); |
| 465 | BUG_ON(limit && goal + size > limit); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 466 | |
Christian Krafft | 7c309a6 | 2006-12-06 20:32:41 -0800 | [diff] [blame] | 467 | if (!bdata->node_bootmem_map) |
| 468 | return NULL; |
| 469 | |
Johannes Weiner | 2e5237d | 2008-07-23 21:28:02 -0700 | [diff] [blame] | 470 | bdebug("nid=%td size=%lx [%lu pages] align=%lx goal=%lx limit=%lx\n", |
| 471 | bdata - bootmem_node_data, size, PAGE_ALIGN(size) >> PAGE_SHIFT, |
| 472 | align, goal, limit); |
| 473 | |
Johannes Weiner | 5f2809e | 2008-07-23 21:28:05 -0700 | [diff] [blame] | 474 | min = PFN_DOWN(bdata->node_boot_start); |
| 475 | max = bdata->node_low_pfn; |
Yinghai Lu | 9a2dc04 | 2008-03-18 12:44:48 -0700 | [diff] [blame] | 476 | |
Johannes Weiner | 5f2809e | 2008-07-23 21:28:05 -0700 | [diff] [blame] | 477 | goal >>= PAGE_SHIFT; |
| 478 | limit >>= PAGE_SHIFT; |
| 479 | |
| 480 | if (limit && max > limit) |
| 481 | max = limit; |
| 482 | if (max <= min) |
Yinghai Lu | 9a2dc04 | 2008-03-18 12:44:48 -0700 | [diff] [blame] | 483 | return NULL; |
| 484 | |
Johannes Weiner | 5f2809e | 2008-07-23 21:28:05 -0700 | [diff] [blame] | 485 | step = max(align >> PAGE_SHIFT, 1UL); |
Yasunori Goto | 281dd25 | 2005-10-19 15:52:18 -0700 | [diff] [blame] | 486 | |
Johannes Weiner | 5f2809e | 2008-07-23 21:28:05 -0700 | [diff] [blame] | 487 | if (goal && min < goal && goal < max) |
| 488 | start = ALIGN(goal, step); |
| 489 | else |
| 490 | start = ALIGN(min, step); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 491 | |
Johannes Weiner | 5f2809e | 2008-07-23 21:28:05 -0700 | [diff] [blame] | 492 | sidx = start - PFN_DOWN(bdata->node_boot_start); |
| 493 | midx = max - PFN_DOWN(bdata->node_boot_start); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 494 | |
Johannes Weiner | 5f2809e | 2008-07-23 21:28:05 -0700 | [diff] [blame] | 495 | if (bdata->hint_idx > sidx) { |
| 496 | /* Make sure we retry on failure */ |
| 497 | goal = 1; |
| 498 | sidx = ALIGN(bdata->hint_idx, step); |
Yinghai Lu | ad09315 | 2008-03-10 23:23:42 -0700 | [diff] [blame] | 499 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 500 | |
Johannes Weiner | 5f2809e | 2008-07-23 21:28:05 -0700 | [diff] [blame] | 501 | while (1) { |
| 502 | int merge; |
| 503 | void *region; |
| 504 | unsigned long eidx, i, start_off, end_off; |
| 505 | find_block: |
| 506 | sidx = find_next_zero_bit(bdata->node_bootmem_map, midx, sidx); |
| 507 | sidx = ALIGN(sidx, step); |
| 508 | eidx = sidx + PFN_UP(size); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 509 | |
Johannes Weiner | 5f2809e | 2008-07-23 21:28:05 -0700 | [diff] [blame] | 510 | if (sidx >= midx || eidx > midx) |
Haren Myneni | 66d43e9 | 2005-12-12 00:37:39 -0800 | [diff] [blame] | 511 | break; |
Johannes Weiner | 5f2809e | 2008-07-23 21:28:05 -0700 | [diff] [blame] | 512 | |
| 513 | for (i = sidx; i < eidx; i++) |
| 514 | if (test_bit(i, bdata->node_bootmem_map)) { |
| 515 | sidx = ALIGN(i, step); |
| 516 | if (sidx == i) |
| 517 | sidx += step; |
| 518 | goto find_block; |
| 519 | } |
| 520 | |
| 521 | if (bdata->last_end_off && |
| 522 | PFN_DOWN(bdata->last_end_off) + 1 == sidx) |
| 523 | start_off = ALIGN(bdata->last_end_off, align); |
| 524 | else |
| 525 | start_off = PFN_PHYS(sidx); |
| 526 | |
| 527 | merge = PFN_DOWN(start_off) < sidx; |
| 528 | end_off = start_off + size; |
| 529 | |
| 530 | bdata->last_end_off = end_off; |
| 531 | bdata->hint_idx = PFN_UP(end_off); |
| 532 | |
| 533 | /* |
| 534 | * Reserve the area now: |
| 535 | */ |
Johannes Weiner | d747fa4 | 2008-07-23 21:28:05 -0700 | [diff] [blame^] | 536 | if (__reserve(bdata, PFN_DOWN(start_off) + merge, |
| 537 | PFN_UP(end_off), BOOTMEM_EXCLUSIVE)) |
| 538 | BUG(); |
Johannes Weiner | 5f2809e | 2008-07-23 21:28:05 -0700 | [diff] [blame] | 539 | |
| 540 | region = phys_to_virt(bdata->node_boot_start + start_off); |
| 541 | memset(region, 0, size); |
| 542 | return region; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 543 | } |
| 544 | |
Johannes Weiner | 5f2809e | 2008-07-23 21:28:05 -0700 | [diff] [blame] | 545 | if (goal) { |
| 546 | goal = 0; |
| 547 | sidx = 0; |
| 548 | goto find_block; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 549 | } |
Johannes Weiner | 5f2809e | 2008-07-23 21:28:05 -0700 | [diff] [blame] | 550 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 551 | return NULL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 552 | } |
| 553 | |
Johannes Weiner | a66fd7d | 2008-07-23 21:28:01 -0700 | [diff] [blame] | 554 | /** |
| 555 | * __alloc_bootmem_nopanic - allocate boot memory without panicking |
| 556 | * @size: size of the request in bytes |
| 557 | * @align: alignment of the region |
| 558 | * @goal: preferred starting address of the region |
| 559 | * |
| 560 | * The goal is dropped if it can not be satisfied and the allocation will |
| 561 | * fall back to memory below @goal. |
| 562 | * |
| 563 | * Allocation may happen on any node in the system. |
| 564 | * |
| 565 | * Returns NULL on failure. |
| 566 | */ |
Franck Bui-Huu | bb0923a | 2006-09-25 23:31:05 -0700 | [diff] [blame] | 567 | void * __init __alloc_bootmem_nopanic(unsigned long size, unsigned long align, |
| 568 | unsigned long goal) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 569 | { |
KAMEZAWA Hiroyuki | 679bc9f | 2006-03-27 01:15:58 -0800 | [diff] [blame] | 570 | bootmem_data_t *bdata; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 571 | void *ptr; |
| 572 | |
Franck Bui-Huu | f71bf0c | 2006-09-25 23:31:08 -0700 | [diff] [blame] | 573 | list_for_each_entry(bdata, &bdata_list, list) { |
Johannes Weiner | ffc6421 | 2008-07-23 21:26:59 -0700 | [diff] [blame] | 574 | ptr = alloc_bootmem_core(bdata, size, align, goal, 0); |
Franck Bui-Huu | f71bf0c | 2006-09-25 23:31:08 -0700 | [diff] [blame] | 575 | if (ptr) |
| 576 | return ptr; |
| 577 | } |
Andi Kleen | a806223 | 2006-04-07 19:49:21 +0200 | [diff] [blame] | 578 | return NULL; |
| 579 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 580 | |
Johannes Weiner | a66fd7d | 2008-07-23 21:28:01 -0700 | [diff] [blame] | 581 | /** |
| 582 | * __alloc_bootmem - allocate boot memory |
| 583 | * @size: size of the request in bytes |
| 584 | * @align: alignment of the region |
| 585 | * @goal: preferred starting address of the region |
| 586 | * |
| 587 | * The goal is dropped if it can not be satisfied and the allocation will |
| 588 | * fall back to memory below @goal. |
| 589 | * |
| 590 | * Allocation may happen on any node in the system. |
| 591 | * |
| 592 | * The function panics if the request can not be satisfied. |
| 593 | */ |
Franck Bui-Huu | bb0923a | 2006-09-25 23:31:05 -0700 | [diff] [blame] | 594 | void * __init __alloc_bootmem(unsigned long size, unsigned long align, |
| 595 | unsigned long goal) |
Andi Kleen | a806223 | 2006-04-07 19:49:21 +0200 | [diff] [blame] | 596 | { |
| 597 | void *mem = __alloc_bootmem_nopanic(size,align,goal); |
Franck Bui-Huu | f71bf0c | 2006-09-25 23:31:08 -0700 | [diff] [blame] | 598 | |
Andi Kleen | a806223 | 2006-04-07 19:49:21 +0200 | [diff] [blame] | 599 | if (mem) |
| 600 | return mem; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 601 | /* |
| 602 | * Whoops, we cannot satisfy the allocation request. |
| 603 | */ |
| 604 | printk(KERN_ALERT "bootmem alloc of %lu bytes failed!\n", size); |
| 605 | panic("Out of memory"); |
| 606 | return NULL; |
| 607 | } |
| 608 | |
Johannes Weiner | a66fd7d | 2008-07-23 21:28:01 -0700 | [diff] [blame] | 609 | /** |
| 610 | * __alloc_bootmem_node - allocate boot memory from a specific node |
| 611 | * @pgdat: node to allocate from |
| 612 | * @size: size of the request in bytes |
| 613 | * @align: alignment of the region |
| 614 | * @goal: preferred starting address of the region |
| 615 | * |
| 616 | * The goal is dropped if it can not be satisfied and the allocation will |
| 617 | * fall back to memory below @goal. |
| 618 | * |
| 619 | * Allocation may fall back to any node in the system if the specified node |
| 620 | * can not hold the requested memory. |
| 621 | * |
| 622 | * The function panics if the request can not be satisfied. |
| 623 | */ |
Franck Bui-Huu | bb0923a | 2006-09-25 23:31:05 -0700 | [diff] [blame] | 624 | void * __init __alloc_bootmem_node(pg_data_t *pgdat, unsigned long size, |
| 625 | unsigned long align, unsigned long goal) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 626 | { |
| 627 | void *ptr; |
| 628 | |
Johannes Weiner | ffc6421 | 2008-07-23 21:26:59 -0700 | [diff] [blame] | 629 | ptr = alloc_bootmem_core(pgdat->bdata, size, align, goal, 0); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 630 | if (ptr) |
Franck Bui-Huu | f71bf0c | 2006-09-25 23:31:08 -0700 | [diff] [blame] | 631 | return ptr; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 632 | |
Ravikiran G Thirumalai | 008857c | 2006-01-06 00:11:01 -0800 | [diff] [blame] | 633 | return __alloc_bootmem(size, align, goal); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 634 | } |
| 635 | |
Yasunori Goto | e70260a | 2008-04-28 02:13:32 -0700 | [diff] [blame] | 636 | #ifdef CONFIG_SPARSEMEM |
Johannes Weiner | a66fd7d | 2008-07-23 21:28:01 -0700 | [diff] [blame] | 637 | /** |
| 638 | * alloc_bootmem_section - allocate boot memory from a specific section |
| 639 | * @size: size of the request in bytes |
| 640 | * @section_nr: sparse map section to allocate from |
| 641 | * |
| 642 | * Return NULL on failure. |
| 643 | */ |
Yasunori Goto | e70260a | 2008-04-28 02:13:32 -0700 | [diff] [blame] | 644 | void * __init alloc_bootmem_section(unsigned long size, |
| 645 | unsigned long section_nr) |
| 646 | { |
| 647 | void *ptr; |
| 648 | unsigned long limit, goal, start_nr, end_nr, pfn; |
| 649 | struct pglist_data *pgdat; |
| 650 | |
| 651 | pfn = section_nr_to_pfn(section_nr); |
| 652 | goal = PFN_PHYS(pfn); |
| 653 | limit = PFN_PHYS(section_nr_to_pfn(section_nr + 1)) - 1; |
| 654 | pgdat = NODE_DATA(early_pfn_to_nid(pfn)); |
Johannes Weiner | ffc6421 | 2008-07-23 21:26:59 -0700 | [diff] [blame] | 655 | ptr = alloc_bootmem_core(pgdat->bdata, size, SMP_CACHE_BYTES, goal, |
| 656 | limit); |
Yasunori Goto | e70260a | 2008-04-28 02:13:32 -0700 | [diff] [blame] | 657 | |
| 658 | if (!ptr) |
| 659 | return NULL; |
| 660 | |
| 661 | start_nr = pfn_to_section_nr(PFN_DOWN(__pa(ptr))); |
| 662 | end_nr = pfn_to_section_nr(PFN_DOWN(__pa(ptr) + size)); |
| 663 | if (start_nr != section_nr || end_nr != section_nr) { |
| 664 | printk(KERN_WARNING "alloc_bootmem failed on section %ld.\n", |
| 665 | section_nr); |
| 666 | free_bootmem_core(pgdat->bdata, __pa(ptr), size); |
| 667 | ptr = NULL; |
| 668 | } |
| 669 | |
| 670 | return ptr; |
| 671 | } |
| 672 | #endif |
| 673 | |
Andi Kleen | b54bbf7 | 2008-07-23 21:27:45 -0700 | [diff] [blame] | 674 | void * __init __alloc_bootmem_node_nopanic(pg_data_t *pgdat, unsigned long size, |
| 675 | unsigned long align, unsigned long goal) |
| 676 | { |
| 677 | void *ptr; |
| 678 | |
| 679 | ptr = alloc_bootmem_core(pgdat->bdata, size, align, goal, 0); |
| 680 | if (ptr) |
| 681 | return ptr; |
| 682 | |
| 683 | return __alloc_bootmem_nopanic(size, align, goal); |
| 684 | } |
| 685 | |
Heiko Carstens | dfd54cb | 2006-09-25 23:31:33 -0700 | [diff] [blame] | 686 | #ifndef ARCH_LOW_ADDRESS_LIMIT |
| 687 | #define ARCH_LOW_ADDRESS_LIMIT 0xffffffffUL |
| 688 | #endif |
Ravikiran G Thirumalai | 008857c | 2006-01-06 00:11:01 -0800 | [diff] [blame] | 689 | |
Johannes Weiner | a66fd7d | 2008-07-23 21:28:01 -0700 | [diff] [blame] | 690 | /** |
| 691 | * __alloc_bootmem_low - allocate low boot memory |
| 692 | * @size: size of the request in bytes |
| 693 | * @align: alignment of the region |
| 694 | * @goal: preferred starting address of the region |
| 695 | * |
| 696 | * The goal is dropped if it can not be satisfied and the allocation will |
| 697 | * fall back to memory below @goal. |
| 698 | * |
| 699 | * Allocation may happen on any node in the system. |
| 700 | * |
| 701 | * The function panics if the request can not be satisfied. |
| 702 | */ |
Franck Bui-Huu | bb0923a | 2006-09-25 23:31:05 -0700 | [diff] [blame] | 703 | void * __init __alloc_bootmem_low(unsigned long size, unsigned long align, |
| 704 | unsigned long goal) |
Ravikiran G Thirumalai | 008857c | 2006-01-06 00:11:01 -0800 | [diff] [blame] | 705 | { |
KAMEZAWA Hiroyuki | 679bc9f | 2006-03-27 01:15:58 -0800 | [diff] [blame] | 706 | bootmem_data_t *bdata; |
Ravikiran G Thirumalai | 008857c | 2006-01-06 00:11:01 -0800 | [diff] [blame] | 707 | void *ptr; |
| 708 | |
Franck Bui-Huu | f71bf0c | 2006-09-25 23:31:08 -0700 | [diff] [blame] | 709 | list_for_each_entry(bdata, &bdata_list, list) { |
Johannes Weiner | ffc6421 | 2008-07-23 21:26:59 -0700 | [diff] [blame] | 710 | ptr = alloc_bootmem_core(bdata, size, align, goal, |
| 711 | ARCH_LOW_ADDRESS_LIMIT); |
Franck Bui-Huu | f71bf0c | 2006-09-25 23:31:08 -0700 | [diff] [blame] | 712 | if (ptr) |
| 713 | return ptr; |
| 714 | } |
Ravikiran G Thirumalai | 008857c | 2006-01-06 00:11:01 -0800 | [diff] [blame] | 715 | |
| 716 | /* |
| 717 | * Whoops, we cannot satisfy the allocation request. |
| 718 | */ |
| 719 | printk(KERN_ALERT "low bootmem alloc of %lu bytes failed!\n", size); |
| 720 | panic("Out of low memory"); |
| 721 | return NULL; |
| 722 | } |
| 723 | |
Johannes Weiner | a66fd7d | 2008-07-23 21:28:01 -0700 | [diff] [blame] | 724 | /** |
| 725 | * __alloc_bootmem_low_node - allocate low boot memory from a specific node |
| 726 | * @pgdat: node to allocate from |
| 727 | * @size: size of the request in bytes |
| 728 | * @align: alignment of the region |
| 729 | * @goal: preferred starting address of the region |
| 730 | * |
| 731 | * The goal is dropped if it can not be satisfied and the allocation will |
| 732 | * fall back to memory below @goal. |
| 733 | * |
| 734 | * Allocation may fall back to any node in the system if the specified node |
| 735 | * can not hold the requested memory. |
| 736 | * |
| 737 | * The function panics if the request can not be satisfied. |
| 738 | */ |
Ravikiran G Thirumalai | 008857c | 2006-01-06 00:11:01 -0800 | [diff] [blame] | 739 | void * __init __alloc_bootmem_low_node(pg_data_t *pgdat, unsigned long size, |
| 740 | unsigned long align, unsigned long goal) |
| 741 | { |
Johannes Weiner | ffc6421 | 2008-07-23 21:26:59 -0700 | [diff] [blame] | 742 | return alloc_bootmem_core(pgdat->bdata, size, align, goal, |
| 743 | ARCH_LOW_ADDRESS_LIMIT); |
Ravikiran G Thirumalai | 008857c | 2006-01-06 00:11:01 -0800 | [diff] [blame] | 744 | } |