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); |
Johannes Weiner | 3560e24 | 2008-07-23 21:28:09 -0700 | [diff] [blame] | 83 | if (bdata->node_min_pfn < ent->node_min_pfn) |
Johannes Weiner | 636cc40 | 2008-07-23 21:28:03 -0700 | [diff] [blame] | 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)); |
Johannes Weiner | 3560e24 | 2008-07-23 21:28:09 -0700 | [diff] [blame] | 99 | bdata->node_min_pfn = 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 | 3560e24 | 2008-07-23 21:28:09 -0700 | [diff] [blame] | 154 | start = bdata->node_min_pfn; |
Johannes Weiner | 41546c1 | 2008-07-23 21:28:03 -0700 | [diff] [blame] | 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; |
Johannes Weiner | 3560e24 | 2008-07-23 21:28:09 -0700 | [diff] [blame] | 170 | idx = start - bdata->node_min_pfn; |
Johannes Weiner | 41546c1 | 2008-07-23 21:28:03 -0700 | [diff] [blame] | 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 | 3560e24 | 2008-07-23 21:28:09 -0700 | [diff] [blame] | 195 | pages = bdata->node_low_pfn - bdata->node_min_pfn; |
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, |
Johannes Weiner | 3560e24 | 2008-07-23 21:28:09 -0700 | [diff] [blame] | 234 | sidx + bdata->node_min_pfn, |
| 235 | eidx + bdata->node_min_pfn); |
Johannes Weiner | d747fa4 | 2008-07-23 21:28:05 -0700 | [diff] [blame] | 236 | |
Johannes Weiner | e2bf3ca | 2008-07-23 21:28:06 -0700 | [diff] [blame] | 237 | if (bdata->hint_idx > sidx) |
| 238 | bdata->hint_idx = sidx; |
| 239 | |
Johannes Weiner | d747fa4 | 2008-07-23 21:28:05 -0700 | [diff] [blame] | 240 | for (idx = sidx; idx < eidx; idx++) |
| 241 | if (!test_and_clear_bit(idx, bdata->node_bootmem_map)) |
| 242 | BUG(); |
| 243 | } |
| 244 | |
| 245 | static int __init __reserve(bootmem_data_t *bdata, unsigned long sidx, |
| 246 | unsigned long eidx, int flags) |
| 247 | { |
| 248 | unsigned long idx; |
| 249 | int exclusive = flags & BOOTMEM_EXCLUSIVE; |
| 250 | |
| 251 | bdebug("nid=%td start=%lx end=%lx flags=%x\n", |
| 252 | bdata - bootmem_node_data, |
Johannes Weiner | 3560e24 | 2008-07-23 21:28:09 -0700 | [diff] [blame] | 253 | sidx + bdata->node_min_pfn, |
| 254 | eidx + bdata->node_min_pfn, |
Johannes Weiner | d747fa4 | 2008-07-23 21:28:05 -0700 | [diff] [blame] | 255 | flags); |
| 256 | |
| 257 | for (idx = sidx; idx < eidx; idx++) |
| 258 | if (test_and_set_bit(idx, bdata->node_bootmem_map)) { |
| 259 | if (exclusive) { |
| 260 | __free(bdata, sidx, idx); |
| 261 | return -EBUSY; |
| 262 | } |
| 263 | bdebug("silent double reserve of PFN %lx\n", |
Johannes Weiner | 3560e24 | 2008-07-23 21:28:09 -0700 | [diff] [blame] | 264 | idx + bdata->node_min_pfn); |
Johannes Weiner | d747fa4 | 2008-07-23 21:28:05 -0700 | [diff] [blame] | 265 | } |
| 266 | return 0; |
| 267 | } |
| 268 | |
Johannes Weiner | e2bf3ca | 2008-07-23 21:28:06 -0700 | [diff] [blame] | 269 | static int __init mark_bootmem_node(bootmem_data_t *bdata, |
| 270 | unsigned long start, unsigned long end, |
| 271 | int reserve, int flags) |
Johannes Weiner | 223e8dc | 2008-07-23 21:28:00 -0700 | [diff] [blame] | 272 | { |
| 273 | unsigned long sidx, eidx; |
Johannes Weiner | 223e8dc | 2008-07-23 21:28:00 -0700 | [diff] [blame] | 274 | |
Johannes Weiner | e2bf3ca | 2008-07-23 21:28:06 -0700 | [diff] [blame] | 275 | bdebug("nid=%td start=%lx end=%lx reserve=%d flags=%x\n", |
| 276 | bdata - bootmem_node_data, start, end, reserve, flags); |
Johannes Weiner | 223e8dc | 2008-07-23 21:28:00 -0700 | [diff] [blame] | 277 | |
Johannes Weiner | 3560e24 | 2008-07-23 21:28:09 -0700 | [diff] [blame] | 278 | BUG_ON(start < bdata->node_min_pfn); |
Johannes Weiner | e2bf3ca | 2008-07-23 21:28:06 -0700 | [diff] [blame] | 279 | BUG_ON(end > bdata->node_low_pfn); |
Johannes Weiner | 223e8dc | 2008-07-23 21:28:00 -0700 | [diff] [blame] | 280 | |
Johannes Weiner | 3560e24 | 2008-07-23 21:28:09 -0700 | [diff] [blame] | 281 | sidx = start - bdata->node_min_pfn; |
| 282 | eidx = end - bdata->node_min_pfn; |
Johannes Weiner | 223e8dc | 2008-07-23 21:28:00 -0700 | [diff] [blame] | 283 | |
Johannes Weiner | e2bf3ca | 2008-07-23 21:28:06 -0700 | [diff] [blame] | 284 | if (reserve) |
| 285 | return __reserve(bdata, sidx, eidx, flags); |
Johannes Weiner | 223e8dc | 2008-07-23 21:28:00 -0700 | [diff] [blame] | 286 | else |
Johannes Weiner | e2bf3ca | 2008-07-23 21:28:06 -0700 | [diff] [blame] | 287 | __free(bdata, sidx, eidx); |
| 288 | return 0; |
| 289 | } |
Johannes Weiner | 223e8dc | 2008-07-23 21:28:00 -0700 | [diff] [blame] | 290 | |
Johannes Weiner | e2bf3ca | 2008-07-23 21:28:06 -0700 | [diff] [blame] | 291 | static int __init mark_bootmem(unsigned long start, unsigned long end, |
| 292 | int reserve, int flags) |
| 293 | { |
| 294 | unsigned long pos; |
| 295 | bootmem_data_t *bdata; |
Johannes Weiner | 223e8dc | 2008-07-23 21:28:00 -0700 | [diff] [blame] | 296 | |
Johannes Weiner | e2bf3ca | 2008-07-23 21:28:06 -0700 | [diff] [blame] | 297 | pos = start; |
| 298 | list_for_each_entry(bdata, &bdata_list, list) { |
| 299 | int err; |
| 300 | unsigned long max; |
| 301 | |
Johannes Weiner | 3560e24 | 2008-07-23 21:28:09 -0700 | [diff] [blame] | 302 | if (pos < bdata->node_min_pfn || |
| 303 | pos >= bdata->node_low_pfn) { |
Johannes Weiner | e2bf3ca | 2008-07-23 21:28:06 -0700 | [diff] [blame] | 304 | BUG_ON(pos != start); |
| 305 | continue; |
| 306 | } |
| 307 | |
| 308 | max = min(bdata->node_low_pfn, end); |
| 309 | |
| 310 | err = mark_bootmem_node(bdata, pos, max, reserve, flags); |
| 311 | if (reserve && err) { |
| 312 | mark_bootmem(start, pos, 0, 0); |
| 313 | return err; |
| 314 | } |
| 315 | |
| 316 | if (max == end) |
| 317 | return 0; |
| 318 | pos = bdata->node_low_pfn; |
| 319 | } |
| 320 | BUG(); |
Johannes Weiner | 223e8dc | 2008-07-23 21:28:00 -0700 | [diff] [blame] | 321 | } |
| 322 | |
Johannes Weiner | a66fd7d | 2008-07-23 21:28:01 -0700 | [diff] [blame] | 323 | /** |
| 324 | * free_bootmem_node - mark a page range as usable |
| 325 | * @pgdat: node the range resides on |
| 326 | * @physaddr: starting address of the range |
| 327 | * @size: size of the range in bytes |
| 328 | * |
| 329 | * Partial pages will be considered reserved and left as they are. |
| 330 | * |
Johannes Weiner | e2bf3ca | 2008-07-23 21:28:06 -0700 | [diff] [blame] | 331 | * The range must reside completely on the specified node. |
Johannes Weiner | a66fd7d | 2008-07-23 21:28:01 -0700 | [diff] [blame] | 332 | */ |
Johannes Weiner | 223e8dc | 2008-07-23 21:28:00 -0700 | [diff] [blame] | 333 | void __init free_bootmem_node(pg_data_t *pgdat, unsigned long physaddr, |
| 334 | unsigned long size) |
| 335 | { |
Johannes Weiner | e2bf3ca | 2008-07-23 21:28:06 -0700 | [diff] [blame] | 336 | unsigned long start, end; |
| 337 | |
| 338 | start = PFN_UP(physaddr); |
| 339 | end = PFN_DOWN(physaddr + size); |
| 340 | |
| 341 | mark_bootmem_node(pgdat->bdata, start, end, 0, 0); |
Johannes Weiner | 223e8dc | 2008-07-23 21:28:00 -0700 | [diff] [blame] | 342 | } |
| 343 | |
Johannes Weiner | a66fd7d | 2008-07-23 21:28:01 -0700 | [diff] [blame] | 344 | /** |
| 345 | * free_bootmem - mark a page range as usable |
| 346 | * @addr: starting address of the range |
| 347 | * @size: size of the range in bytes |
| 348 | * |
| 349 | * Partial pages will be considered reserved and left as they are. |
| 350 | * |
Johannes Weiner | e2bf3ca | 2008-07-23 21:28:06 -0700 | [diff] [blame] | 351 | * The range must be contiguous but may span node boundaries. |
Johannes Weiner | a66fd7d | 2008-07-23 21:28:01 -0700 | [diff] [blame] | 352 | */ |
Johannes Weiner | 223e8dc | 2008-07-23 21:28:00 -0700 | [diff] [blame] | 353 | void __init free_bootmem(unsigned long addr, unsigned long size) |
| 354 | { |
Johannes Weiner | e2bf3ca | 2008-07-23 21:28:06 -0700 | [diff] [blame] | 355 | unsigned long start, end; |
Johannes Weiner | 223e8dc | 2008-07-23 21:28:00 -0700 | [diff] [blame] | 356 | |
Johannes Weiner | e2bf3ca | 2008-07-23 21:28:06 -0700 | [diff] [blame] | 357 | start = PFN_UP(addr); |
| 358 | end = PFN_DOWN(addr + size); |
Yinghai Lu | a5645a6 | 2008-03-18 12:49:12 -0700 | [diff] [blame] | 359 | |
Johannes Weiner | e2bf3ca | 2008-07-23 21:28:06 -0700 | [diff] [blame] | 360 | mark_bootmem(start, end, 0, 0); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 361 | } |
| 362 | |
Johannes Weiner | a66fd7d | 2008-07-23 21:28:01 -0700 | [diff] [blame] | 363 | /** |
| 364 | * reserve_bootmem_node - mark a page range as reserved |
| 365 | * @pgdat: node the range resides on |
| 366 | * @physaddr: starting address of the range |
| 367 | * @size: size of the range in bytes |
| 368 | * @flags: reservation flags (see linux/bootmem.h) |
| 369 | * |
| 370 | * Partial pages will be reserved. |
| 371 | * |
Johannes Weiner | e2bf3ca | 2008-07-23 21:28:06 -0700 | [diff] [blame] | 372 | * The range must reside completely on the specified node. |
Johannes Weiner | a66fd7d | 2008-07-23 21:28:01 -0700 | [diff] [blame] | 373 | */ |
Johannes Weiner | 223e8dc | 2008-07-23 21:28:00 -0700 | [diff] [blame] | 374 | int __init reserve_bootmem_node(pg_data_t *pgdat, unsigned long physaddr, |
| 375 | unsigned long size, int flags) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 376 | { |
Johannes Weiner | e2bf3ca | 2008-07-23 21:28:06 -0700 | [diff] [blame] | 377 | unsigned long start, end; |
Franck Bui-Huu | bbc7b92 | 2006-09-25 23:31:07 -0700 | [diff] [blame] | 378 | |
Johannes Weiner | e2bf3ca | 2008-07-23 21:28:06 -0700 | [diff] [blame] | 379 | start = PFN_DOWN(physaddr); |
| 380 | end = PFN_UP(physaddr + size); |
| 381 | |
| 382 | return mark_bootmem_node(pgdat->bdata, start, end, 1, flags); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 383 | } |
| 384 | |
Johannes Weiner | 223e8dc | 2008-07-23 21:28:00 -0700 | [diff] [blame] | 385 | #ifndef CONFIG_HAVE_ARCH_BOOTMEM_NODE |
Johannes Weiner | a66fd7d | 2008-07-23 21:28:01 -0700 | [diff] [blame] | 386 | /** |
| 387 | * reserve_bootmem - mark a page range as usable |
| 388 | * @addr: starting address of the range |
| 389 | * @size: size of the range in bytes |
| 390 | * @flags: reservation flags (see linux/bootmem.h) |
| 391 | * |
| 392 | * Partial pages will be reserved. |
| 393 | * |
Johannes Weiner | e2bf3ca | 2008-07-23 21:28:06 -0700 | [diff] [blame] | 394 | * The range must be contiguous but may span node boundaries. |
Johannes Weiner | a66fd7d | 2008-07-23 21:28:01 -0700 | [diff] [blame] | 395 | */ |
Johannes Weiner | 223e8dc | 2008-07-23 21:28:00 -0700 | [diff] [blame] | 396 | int __init reserve_bootmem(unsigned long addr, unsigned long size, |
| 397 | int flags) |
| 398 | { |
Johannes Weiner | e2bf3ca | 2008-07-23 21:28:06 -0700 | [diff] [blame] | 399 | unsigned long start, end; |
Johannes Weiner | 223e8dc | 2008-07-23 21:28:00 -0700 | [diff] [blame] | 400 | |
Johannes Weiner | e2bf3ca | 2008-07-23 21:28:06 -0700 | [diff] [blame] | 401 | start = PFN_DOWN(addr); |
| 402 | end = PFN_UP(addr + size); |
Johannes Weiner | 223e8dc | 2008-07-23 21:28:00 -0700 | [diff] [blame] | 403 | |
Johannes Weiner | e2bf3ca | 2008-07-23 21:28:06 -0700 | [diff] [blame] | 404 | return mark_bootmem(start, end, 1, flags); |
Johannes Weiner | 223e8dc | 2008-07-23 21:28:00 -0700 | [diff] [blame] | 405 | } |
| 406 | #endif /* !CONFIG_HAVE_ARCH_BOOTMEM_NODE */ |
| 407 | |
Johannes Weiner | 5f2809e | 2008-07-23 21:28:05 -0700 | [diff] [blame] | 408 | static void * __init alloc_bootmem_core(struct bootmem_data *bdata, |
| 409 | unsigned long size, unsigned long align, |
| 410 | unsigned long goal, unsigned long limit) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 411 | { |
Johannes Weiner | 0f3caba | 2008-07-23 21:28:07 -0700 | [diff] [blame] | 412 | unsigned long fallback = 0; |
Johannes Weiner | 5f2809e | 2008-07-23 21:28:05 -0700 | [diff] [blame] | 413 | unsigned long min, max, start, sidx, midx, step; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 414 | |
Johannes Weiner | 5f2809e | 2008-07-23 21:28:05 -0700 | [diff] [blame] | 415 | BUG_ON(!size); |
| 416 | BUG_ON(align & (align - 1)); |
| 417 | BUG_ON(limit && goal + size > limit); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 418 | |
Christian Krafft | 7c309a6 | 2006-12-06 20:32:41 -0800 | [diff] [blame] | 419 | if (!bdata->node_bootmem_map) |
| 420 | return NULL; |
| 421 | |
Johannes Weiner | 2e5237d | 2008-07-23 21:28:02 -0700 | [diff] [blame] | 422 | bdebug("nid=%td size=%lx [%lu pages] align=%lx goal=%lx limit=%lx\n", |
| 423 | bdata - bootmem_node_data, size, PAGE_ALIGN(size) >> PAGE_SHIFT, |
| 424 | align, goal, limit); |
| 425 | |
Johannes Weiner | 3560e24 | 2008-07-23 21:28:09 -0700 | [diff] [blame] | 426 | min = bdata->node_min_pfn; |
Johannes Weiner | 5f2809e | 2008-07-23 21:28:05 -0700 | [diff] [blame] | 427 | max = bdata->node_low_pfn; |
Yinghai Lu | 9a2dc04 | 2008-03-18 12:44:48 -0700 | [diff] [blame] | 428 | |
Johannes Weiner | 5f2809e | 2008-07-23 21:28:05 -0700 | [diff] [blame] | 429 | goal >>= PAGE_SHIFT; |
| 430 | limit >>= PAGE_SHIFT; |
| 431 | |
| 432 | if (limit && max > limit) |
| 433 | max = limit; |
| 434 | if (max <= min) |
Yinghai Lu | 9a2dc04 | 2008-03-18 12:44:48 -0700 | [diff] [blame] | 435 | return NULL; |
| 436 | |
Johannes Weiner | 5f2809e | 2008-07-23 21:28:05 -0700 | [diff] [blame] | 437 | step = max(align >> PAGE_SHIFT, 1UL); |
Yasunori Goto | 281dd25 | 2005-10-19 15:52:18 -0700 | [diff] [blame] | 438 | |
Johannes Weiner | 5f2809e | 2008-07-23 21:28:05 -0700 | [diff] [blame] | 439 | if (goal && min < goal && goal < max) |
| 440 | start = ALIGN(goal, step); |
| 441 | else |
| 442 | start = ALIGN(min, step); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 443 | |
Johannes Weiner | 3560e24 | 2008-07-23 21:28:09 -0700 | [diff] [blame] | 444 | sidx = start - bdata->node_min_pfn;; |
| 445 | midx = max - bdata->node_min_pfn; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 446 | |
Johannes Weiner | 5f2809e | 2008-07-23 21:28:05 -0700 | [diff] [blame] | 447 | if (bdata->hint_idx > sidx) { |
Johannes Weiner | 0f3caba | 2008-07-23 21:28:07 -0700 | [diff] [blame] | 448 | /* |
| 449 | * Handle the valid case of sidx being zero and still |
| 450 | * catch the fallback below. |
| 451 | */ |
| 452 | fallback = sidx + 1; |
Johannes Weiner | 5f2809e | 2008-07-23 21:28:05 -0700 | [diff] [blame] | 453 | sidx = ALIGN(bdata->hint_idx, step); |
Yinghai Lu | ad09315 | 2008-03-10 23:23:42 -0700 | [diff] [blame] | 454 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 455 | |
Johannes Weiner | 5f2809e | 2008-07-23 21:28:05 -0700 | [diff] [blame] | 456 | while (1) { |
| 457 | int merge; |
| 458 | void *region; |
| 459 | unsigned long eidx, i, start_off, end_off; |
| 460 | find_block: |
| 461 | sidx = find_next_zero_bit(bdata->node_bootmem_map, midx, sidx); |
| 462 | sidx = ALIGN(sidx, step); |
| 463 | eidx = sidx + PFN_UP(size); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 464 | |
Johannes Weiner | 5f2809e | 2008-07-23 21:28:05 -0700 | [diff] [blame] | 465 | if (sidx >= midx || eidx > midx) |
Haren Myneni | 66d43e9 | 2005-12-12 00:37:39 -0800 | [diff] [blame] | 466 | break; |
Johannes Weiner | 5f2809e | 2008-07-23 21:28:05 -0700 | [diff] [blame] | 467 | |
| 468 | for (i = sidx; i < eidx; i++) |
| 469 | if (test_bit(i, bdata->node_bootmem_map)) { |
| 470 | sidx = ALIGN(i, step); |
| 471 | if (sidx == i) |
| 472 | sidx += step; |
| 473 | goto find_block; |
| 474 | } |
| 475 | |
Mikulas Patocka | 627240a | 2008-08-15 00:40:17 -0700 | [diff] [blame] | 476 | if (bdata->last_end_off & (PAGE_SIZE - 1) && |
Johannes Weiner | 5f2809e | 2008-07-23 21:28:05 -0700 | [diff] [blame] | 477 | PFN_DOWN(bdata->last_end_off) + 1 == sidx) |
| 478 | start_off = ALIGN(bdata->last_end_off, align); |
| 479 | else |
| 480 | start_off = PFN_PHYS(sidx); |
| 481 | |
| 482 | merge = PFN_DOWN(start_off) < sidx; |
| 483 | end_off = start_off + size; |
| 484 | |
| 485 | bdata->last_end_off = end_off; |
| 486 | bdata->hint_idx = PFN_UP(end_off); |
| 487 | |
| 488 | /* |
| 489 | * Reserve the area now: |
| 490 | */ |
Johannes Weiner | d747fa4 | 2008-07-23 21:28:05 -0700 | [diff] [blame] | 491 | if (__reserve(bdata, PFN_DOWN(start_off) + merge, |
| 492 | PFN_UP(end_off), BOOTMEM_EXCLUSIVE)) |
| 493 | BUG(); |
Johannes Weiner | 5f2809e | 2008-07-23 21:28:05 -0700 | [diff] [blame] | 494 | |
Johannes Weiner | 3560e24 | 2008-07-23 21:28:09 -0700 | [diff] [blame] | 495 | region = phys_to_virt(PFN_PHYS(bdata->node_min_pfn) + |
| 496 | start_off); |
Johannes Weiner | 5f2809e | 2008-07-23 21:28:05 -0700 | [diff] [blame] | 497 | memset(region, 0, size); |
| 498 | return region; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 499 | } |
| 500 | |
Johannes Weiner | 0f3caba | 2008-07-23 21:28:07 -0700 | [diff] [blame] | 501 | if (fallback) { |
| 502 | sidx = ALIGN(fallback - 1, step); |
| 503 | fallback = 0; |
| 504 | goto find_block; |
| 505 | } |
| 506 | |
| 507 | return NULL; |
| 508 | } |
| 509 | |
| 510 | static void * __init ___alloc_bootmem_nopanic(unsigned long size, |
| 511 | unsigned long align, |
| 512 | unsigned long goal, |
| 513 | unsigned long limit) |
| 514 | { |
| 515 | bootmem_data_t *bdata; |
| 516 | |
| 517 | restart: |
| 518 | list_for_each_entry(bdata, &bdata_list, list) { |
| 519 | void *region; |
| 520 | |
| 521 | if (goal && bdata->node_low_pfn <= PFN_DOWN(goal)) |
| 522 | continue; |
Johannes Weiner | 3560e24 | 2008-07-23 21:28:09 -0700 | [diff] [blame] | 523 | if (limit && bdata->node_min_pfn >= PFN_DOWN(limit)) |
Johannes Weiner | 0f3caba | 2008-07-23 21:28:07 -0700 | [diff] [blame] | 524 | break; |
| 525 | |
| 526 | region = alloc_bootmem_core(bdata, size, align, goal, limit); |
| 527 | if (region) |
| 528 | return region; |
| 529 | } |
| 530 | |
Johannes Weiner | 5f2809e | 2008-07-23 21:28:05 -0700 | [diff] [blame] | 531 | if (goal) { |
| 532 | goal = 0; |
Johannes Weiner | 0f3caba | 2008-07-23 21:28:07 -0700 | [diff] [blame] | 533 | goto restart; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 534 | } |
Johannes Weiner | 5f2809e | 2008-07-23 21:28:05 -0700 | [diff] [blame] | 535 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 536 | return NULL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 537 | } |
| 538 | |
Johannes Weiner | a66fd7d | 2008-07-23 21:28:01 -0700 | [diff] [blame] | 539 | /** |
| 540 | * __alloc_bootmem_nopanic - allocate boot memory without panicking |
| 541 | * @size: size of the request in bytes |
| 542 | * @align: alignment of the region |
| 543 | * @goal: preferred starting address of the region |
| 544 | * |
| 545 | * The goal is dropped if it can not be satisfied and the allocation will |
| 546 | * fall back to memory below @goal. |
| 547 | * |
| 548 | * Allocation may happen on any node in the system. |
| 549 | * |
| 550 | * Returns NULL on failure. |
| 551 | */ |
Franck Bui-Huu | bb0923a | 2006-09-25 23:31:05 -0700 | [diff] [blame] | 552 | void * __init __alloc_bootmem_nopanic(unsigned long size, unsigned long align, |
Johannes Weiner | 0f3caba | 2008-07-23 21:28:07 -0700 | [diff] [blame] | 553 | unsigned long goal) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 554 | { |
Johannes Weiner | 0f3caba | 2008-07-23 21:28:07 -0700 | [diff] [blame] | 555 | return ___alloc_bootmem_nopanic(size, align, goal, 0); |
| 556 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 557 | |
Johannes Weiner | 0f3caba | 2008-07-23 21:28:07 -0700 | [diff] [blame] | 558 | static void * __init ___alloc_bootmem(unsigned long size, unsigned long align, |
| 559 | unsigned long goal, unsigned long limit) |
| 560 | { |
| 561 | void *mem = ___alloc_bootmem_nopanic(size, align, goal, limit); |
| 562 | |
| 563 | if (mem) |
| 564 | return mem; |
| 565 | /* |
| 566 | * Whoops, we cannot satisfy the allocation request. |
| 567 | */ |
| 568 | printk(KERN_ALERT "bootmem alloc of %lu bytes failed!\n", size); |
| 569 | panic("Out of memory"); |
Andi Kleen | a806223 | 2006-04-07 19:49:21 +0200 | [diff] [blame] | 570 | return NULL; |
| 571 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 572 | |
Johannes Weiner | a66fd7d | 2008-07-23 21:28:01 -0700 | [diff] [blame] | 573 | /** |
| 574 | * __alloc_bootmem - allocate boot memory |
| 575 | * @size: size of the request in bytes |
| 576 | * @align: alignment of the region |
| 577 | * @goal: preferred starting address of the region |
| 578 | * |
| 579 | * The goal is dropped if it can not be satisfied and the allocation will |
| 580 | * fall back to memory below @goal. |
| 581 | * |
| 582 | * Allocation may happen on any node in the system. |
| 583 | * |
| 584 | * The function panics if the request can not be satisfied. |
| 585 | */ |
Franck Bui-Huu | bb0923a | 2006-09-25 23:31:05 -0700 | [diff] [blame] | 586 | void * __init __alloc_bootmem(unsigned long size, unsigned long align, |
| 587 | unsigned long goal) |
Andi Kleen | a806223 | 2006-04-07 19:49:21 +0200 | [diff] [blame] | 588 | { |
Johannes Weiner | 0f3caba | 2008-07-23 21:28:07 -0700 | [diff] [blame] | 589 | return ___alloc_bootmem(size, align, goal, 0); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 590 | } |
| 591 | |
Johannes Weiner | 4cc278b | 2008-07-23 21:28:08 -0700 | [diff] [blame] | 592 | static void * __init ___alloc_bootmem_node(bootmem_data_t *bdata, |
| 593 | unsigned long size, unsigned long align, |
| 594 | unsigned long goal, unsigned long limit) |
| 595 | { |
| 596 | void *ptr; |
| 597 | |
| 598 | ptr = alloc_bootmem_core(bdata, size, align, goal, limit); |
| 599 | if (ptr) |
| 600 | return ptr; |
| 601 | |
| 602 | return ___alloc_bootmem(size, align, goal, limit); |
| 603 | } |
| 604 | |
Johannes Weiner | a66fd7d | 2008-07-23 21:28:01 -0700 | [diff] [blame] | 605 | /** |
| 606 | * __alloc_bootmem_node - allocate boot memory from a specific node |
| 607 | * @pgdat: node to allocate from |
| 608 | * @size: size of the request in bytes |
| 609 | * @align: alignment of the region |
| 610 | * @goal: preferred starting address of the region |
| 611 | * |
| 612 | * The goal is dropped if it can not be satisfied and the allocation will |
| 613 | * fall back to memory below @goal. |
| 614 | * |
| 615 | * Allocation may fall back to any node in the system if the specified node |
| 616 | * can not hold the requested memory. |
| 617 | * |
| 618 | * The function panics if the request can not be satisfied. |
| 619 | */ |
Franck Bui-Huu | bb0923a | 2006-09-25 23:31:05 -0700 | [diff] [blame] | 620 | void * __init __alloc_bootmem_node(pg_data_t *pgdat, unsigned long size, |
| 621 | unsigned long align, unsigned long goal) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 622 | { |
Johannes Weiner | 4cc278b | 2008-07-23 21:28:08 -0700 | [diff] [blame] | 623 | return ___alloc_bootmem_node(pgdat->bdata, size, align, goal, 0); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 624 | } |
| 625 | |
Yasunori Goto | e70260a | 2008-04-28 02:13:32 -0700 | [diff] [blame] | 626 | #ifdef CONFIG_SPARSEMEM |
Johannes Weiner | a66fd7d | 2008-07-23 21:28:01 -0700 | [diff] [blame] | 627 | /** |
| 628 | * alloc_bootmem_section - allocate boot memory from a specific section |
| 629 | * @size: size of the request in bytes |
| 630 | * @section_nr: sparse map section to allocate from |
| 631 | * |
| 632 | * Return NULL on failure. |
| 633 | */ |
Yasunori Goto | e70260a | 2008-04-28 02:13:32 -0700 | [diff] [blame] | 634 | void * __init alloc_bootmem_section(unsigned long size, |
| 635 | unsigned long section_nr) |
| 636 | { |
Johannes Weiner | 75a56cf | 2008-07-23 21:28:09 -0700 | [diff] [blame] | 637 | bootmem_data_t *bdata; |
| 638 | unsigned long pfn, goal, limit; |
Yasunori Goto | e70260a | 2008-04-28 02:13:32 -0700 | [diff] [blame] | 639 | |
| 640 | pfn = section_nr_to_pfn(section_nr); |
Johannes Weiner | 75a56cf | 2008-07-23 21:28:09 -0700 | [diff] [blame] | 641 | goal = pfn << PAGE_SHIFT; |
| 642 | limit = section_nr_to_pfn(section_nr + 1) << PAGE_SHIFT; |
| 643 | bdata = &bootmem_node_data[early_pfn_to_nid(pfn)]; |
Yasunori Goto | e70260a | 2008-04-28 02:13:32 -0700 | [diff] [blame] | 644 | |
Johannes Weiner | 75a56cf | 2008-07-23 21:28:09 -0700 | [diff] [blame] | 645 | return alloc_bootmem_core(bdata, size, SMP_CACHE_BYTES, goal, limit); |
Yasunori Goto | e70260a | 2008-04-28 02:13:32 -0700 | [diff] [blame] | 646 | } |
| 647 | #endif |
| 648 | |
Andi Kleen | b54bbf7 | 2008-07-23 21:27:45 -0700 | [diff] [blame] | 649 | void * __init __alloc_bootmem_node_nopanic(pg_data_t *pgdat, unsigned long size, |
| 650 | unsigned long align, unsigned long goal) |
| 651 | { |
| 652 | void *ptr; |
| 653 | |
| 654 | ptr = alloc_bootmem_core(pgdat->bdata, size, align, goal, 0); |
| 655 | if (ptr) |
| 656 | return ptr; |
| 657 | |
| 658 | return __alloc_bootmem_nopanic(size, align, goal); |
| 659 | } |
| 660 | |
Heiko Carstens | dfd54cb | 2006-09-25 23:31:33 -0700 | [diff] [blame] | 661 | #ifndef ARCH_LOW_ADDRESS_LIMIT |
| 662 | #define ARCH_LOW_ADDRESS_LIMIT 0xffffffffUL |
| 663 | #endif |
Ravikiran G Thirumalai | 008857c | 2006-01-06 00:11:01 -0800 | [diff] [blame] | 664 | |
Johannes Weiner | a66fd7d | 2008-07-23 21:28:01 -0700 | [diff] [blame] | 665 | /** |
| 666 | * __alloc_bootmem_low - allocate low boot memory |
| 667 | * @size: size of the request in bytes |
| 668 | * @align: alignment of the region |
| 669 | * @goal: preferred starting address of the region |
| 670 | * |
| 671 | * The goal is dropped if it can not be satisfied and the allocation will |
| 672 | * fall back to memory below @goal. |
| 673 | * |
| 674 | * Allocation may happen on any node in the system. |
| 675 | * |
| 676 | * The function panics if the request can not be satisfied. |
| 677 | */ |
Franck Bui-Huu | bb0923a | 2006-09-25 23:31:05 -0700 | [diff] [blame] | 678 | void * __init __alloc_bootmem_low(unsigned long size, unsigned long align, |
| 679 | unsigned long goal) |
Ravikiran G Thirumalai | 008857c | 2006-01-06 00:11:01 -0800 | [diff] [blame] | 680 | { |
Johannes Weiner | 0f3caba | 2008-07-23 21:28:07 -0700 | [diff] [blame] | 681 | return ___alloc_bootmem(size, align, goal, ARCH_LOW_ADDRESS_LIMIT); |
Ravikiran G Thirumalai | 008857c | 2006-01-06 00:11:01 -0800 | [diff] [blame] | 682 | } |
| 683 | |
Johannes Weiner | a66fd7d | 2008-07-23 21:28:01 -0700 | [diff] [blame] | 684 | /** |
| 685 | * __alloc_bootmem_low_node - allocate low boot memory from a specific node |
| 686 | * @pgdat: node to allocate from |
| 687 | * @size: size of the request in bytes |
| 688 | * @align: alignment of the region |
| 689 | * @goal: preferred starting address of the region |
| 690 | * |
| 691 | * The goal is dropped if it can not be satisfied and the allocation will |
| 692 | * fall back to memory below @goal. |
| 693 | * |
| 694 | * Allocation may fall back to any node in the system if the specified node |
| 695 | * can not hold the requested memory. |
| 696 | * |
| 697 | * The function panics if the request can not be satisfied. |
| 698 | */ |
Ravikiran G Thirumalai | 008857c | 2006-01-06 00:11:01 -0800 | [diff] [blame] | 699 | void * __init __alloc_bootmem_low_node(pg_data_t *pgdat, unsigned long size, |
| 700 | unsigned long align, unsigned long goal) |
| 701 | { |
Johannes Weiner | 4cc278b | 2008-07-23 21:28:08 -0700 | [diff] [blame] | 702 | return ___alloc_bootmem_node(pgdat->bdata, size, align, |
| 703 | goal, ARCH_LOW_ADDRESS_LIMIT); |
Ravikiran G Thirumalai | 008857c | 2006-01-06 00:11:01 -0800 | [diff] [blame] | 704 | } |