Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1 | /* |
| 2 | * Written by: Patricia Gaughen <gone@us.ibm.com>, IBM Corporation |
| 3 | * August 2002: added remote node KVA remap - Martin J. Bligh |
| 4 | * |
| 5 | * Copyright (C) 2002, IBM Corp. |
| 6 | * |
| 7 | * All rights reserved. |
| 8 | * |
| 9 | * This program is free software; you can redistribute it and/or modify |
| 10 | * it under the terms of the GNU General Public License as published by |
| 11 | * the Free Software Foundation; either version 2 of the License, or |
| 12 | * (at your option) any later version. |
| 13 | * |
| 14 | * This program is distributed in the hope that it will be useful, but |
| 15 | * WITHOUT ANY WARRANTY; without even the implied warranty of |
| 16 | * MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, GOOD TITLE or |
| 17 | * NON INFRINGEMENT. See the GNU General Public License for more |
| 18 | * details. |
| 19 | * |
| 20 | * You should have received a copy of the GNU General Public License |
| 21 | * along with this program; if not, write to the Free Software |
| 22 | * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. |
| 23 | */ |
| 24 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 25 | #include <linux/mm.h> |
| 26 | #include <linux/bootmem.h> |
| 27 | #include <linux/mmzone.h> |
| 28 | #include <linux/highmem.h> |
| 29 | #include <linux/initrd.h> |
| 30 | #include <linux/nodemask.h> |
Alexey Dobriyan | 129f694 | 2005-06-23 00:08:33 -0700 | [diff] [blame] | 31 | #include <linux/module.h> |
Eric W. Biederman | 1bc3b91 | 2005-06-25 14:58:01 -0700 | [diff] [blame] | 32 | #include <linux/kexec.h> |
Dave Hansen | 22a9835 | 2006-03-27 01:16:04 -0800 | [diff] [blame] | 33 | #include <linux/pfn.h> |
Linus Torvalds | 28aa483 | 2007-05-15 18:45:49 -0700 | [diff] [blame] | 34 | #include <linux/swap.h> |
Mel Gorman | 1b000a5 | 2008-01-30 13:33:25 +0100 | [diff] [blame] | 35 | #include <linux/acpi.h> |
Eric W. Biederman | 1bc3b91 | 2005-06-25 14:58:01 -0700 | [diff] [blame] | 36 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 37 | #include <asm/e820.h> |
| 38 | #include <asm/setup.h> |
| 39 | #include <asm/mmzone.h> |
Alexey Starikovskiy | ce3fe6b | 2008-03-17 22:08:17 +0300 | [diff] [blame] | 40 | #include <asm/bios_ebda.h> |
Yinghai Lu | 287572c | 2008-06-01 21:06:31 -0700 | [diff] [blame] | 41 | #include <asm/proto.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 42 | |
Ravikiran G Thirumalai | 6c231b7 | 2005-09-06 15:17:45 -0700 | [diff] [blame] | 43 | struct pglist_data *node_data[MAX_NUMNODES] __read_mostly; |
Alexey Dobriyan | 129f694 | 2005-06-23 00:08:33 -0700 | [diff] [blame] | 44 | EXPORT_SYMBOL(node_data); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 45 | |
| 46 | /* |
Adrian Bunk | d254c8f | 2006-06-30 18:29:51 +0200 | [diff] [blame] | 47 | * numa interface - we expect the numa architecture specific code to have |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 48 | * populated the following initialisation. |
| 49 | * |
| 50 | * 1) node_online_map - the map of all nodes configured (online) in the system |
Andy Whitcroft | 05b79bd | 2005-06-23 00:07:57 -0700 | [diff] [blame] | 51 | * 2) node_start_pfn - the starting page frame number for a node |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 52 | * 3) node_end_pfn - the ending page fram number for a node |
| 53 | */ |
Ravikiran G Thirumalai | 6c231b7 | 2005-09-06 15:17:45 -0700 | [diff] [blame] | 54 | unsigned long node_start_pfn[MAX_NUMNODES] __read_mostly; |
| 55 | unsigned long node_end_pfn[MAX_NUMNODES] __read_mostly; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 56 | |
Andy Whitcroft | 05b79bd | 2005-06-23 00:07:57 -0700 | [diff] [blame] | 57 | |
| 58 | #ifdef CONFIG_DISCONTIGMEM |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 59 | /* |
Andy Whitcroft | 05b79bd | 2005-06-23 00:07:57 -0700 | [diff] [blame] | 60 | * 4) physnode_map - the mapping between a pfn and owning node |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 61 | * physnode_map keeps track of the physical memory layout of a generic |
Yinghai Lu | ba924c8 | 2008-05-31 22:51:51 -0700 | [diff] [blame] | 62 | * numa node on a 64Mb break (each element of the array will |
| 63 | * represent 64Mb of memory and will be marked by the node id. so, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 64 | * if the first gig is on node 0, and the second gig is on node 1 |
| 65 | * physnode_map will contain: |
| 66 | * |
Yinghai Lu | ba924c8 | 2008-05-31 22:51:51 -0700 | [diff] [blame] | 67 | * physnode_map[0-15] = 0; |
| 68 | * physnode_map[16-31] = 1; |
| 69 | * physnode_map[32- ] = -1; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 70 | */ |
Ravikiran G Thirumalai | 6c231b7 | 2005-09-06 15:17:45 -0700 | [diff] [blame] | 71 | s8 physnode_map[MAX_ELEMENTS] __read_mostly = { [0 ... (MAX_ELEMENTS - 1)] = -1}; |
Alexey Dobriyan | 129f694 | 2005-06-23 00:08:33 -0700 | [diff] [blame] | 72 | EXPORT_SYMBOL(physnode_map); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 73 | |
| 74 | void memory_present(int nid, unsigned long start, unsigned long end) |
| 75 | { |
| 76 | unsigned long pfn; |
| 77 | |
Yinghai Lu | c094345 | 2008-06-23 16:41:30 -0700 | [diff] [blame] | 78 | printk(KERN_INFO "Node: %d, start_pfn: %lx, end_pfn: %lx\n", |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 79 | nid, start, end); |
| 80 | printk(KERN_DEBUG " Setting physnode_map array to node %d for pfns:\n", nid); |
| 81 | printk(KERN_DEBUG " "); |
| 82 | for (pfn = start; pfn < end; pfn += PAGES_PER_ELEMENT) { |
| 83 | physnode_map[pfn / PAGES_PER_ELEMENT] = nid; |
Yinghai Lu | c094345 | 2008-06-23 16:41:30 -0700 | [diff] [blame] | 84 | printk(KERN_CONT "%lx ", pfn); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 85 | } |
Yinghai Lu | ba924c8 | 2008-05-31 22:51:51 -0700 | [diff] [blame] | 86 | printk(KERN_CONT "\n"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 87 | } |
| 88 | |
| 89 | unsigned long node_memmap_size_bytes(int nid, unsigned long start_pfn, |
| 90 | unsigned long end_pfn) |
| 91 | { |
| 92 | unsigned long nr_pages = end_pfn - start_pfn; |
| 93 | |
| 94 | if (!nr_pages) |
| 95 | return 0; |
| 96 | |
| 97 | return (nr_pages + 1) * sizeof(struct page); |
| 98 | } |
Andy Whitcroft | 05b79bd | 2005-06-23 00:07:57 -0700 | [diff] [blame] | 99 | #endif |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 100 | |
| 101 | extern unsigned long find_max_low_pfn(void); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 102 | extern unsigned long highend_pfn, highstart_pfn; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 103 | |
| 104 | #define LARGE_PAGE_BYTES (PTRS_PER_PTE * PAGE_SIZE) |
| 105 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 106 | unsigned long node_remap_size[MAX_NUMNODES]; |
Adrian Bunk | 59659f1 | 2007-10-17 18:04:36 +0200 | [diff] [blame] | 107 | static void *node_remap_start_vaddr[MAX_NUMNODES]; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 108 | void set_pmd_pfn(unsigned long vaddr, unsigned long pfn, pgprot_t flags); |
| 109 | |
keith mannthey | 9102330 | 2006-09-25 23:31:03 -0700 | [diff] [blame] | 110 | static unsigned long kva_start_pfn; |
| 111 | static unsigned long kva_pages; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 112 | /* |
| 113 | * FLAT - support for basic PC memory model with discontig enabled, essentially |
| 114 | * a single node with all available processors in it with a flat |
| 115 | * memory map. |
| 116 | */ |
| 117 | int __init get_memcfg_numa_flat(void) |
| 118 | { |
Yinghai Lu | c094345 | 2008-06-23 16:41:30 -0700 | [diff] [blame] | 119 | printk(KERN_DEBUG "NUMA - single node, flat memory mode\n"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 120 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 121 | node_start_pfn[0] = 0; |
| 122 | node_end_pfn[0] = max_pfn; |
Yinghai Lu | 7b2a0a6 | 2008-06-03 19:35:04 -0700 | [diff] [blame] | 123 | e820_register_active_regions(0, 0, max_pfn); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 124 | memory_present(0, 0, max_pfn); |
Yinghai Lu | b66cd72 | 2008-05-31 22:53:47 -0700 | [diff] [blame] | 125 | node_remap_size[0] = node_memmap_size_bytes(0, 0, max_pfn); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 126 | |
| 127 | /* Indicate there is one node available. */ |
| 128 | nodes_clear(node_online_map); |
| 129 | node_set_online(0); |
| 130 | return 1; |
| 131 | } |
| 132 | |
| 133 | /* |
| 134 | * Find the highest page frame number we have available for the node |
| 135 | */ |
Ingo Molnar | fa5c463 | 2008-04-16 02:29:42 +0200 | [diff] [blame] | 136 | static void __init propagate_e820_map_node(int nid) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 137 | { |
| 138 | if (node_end_pfn[nid] > max_pfn) |
| 139 | node_end_pfn[nid] = max_pfn; |
| 140 | /* |
| 141 | * if a user has given mem=XXXX, then we need to make sure |
| 142 | * that the node _starts_ before that, too, not just ends |
| 143 | */ |
| 144 | if (node_start_pfn[nid] > max_pfn) |
| 145 | node_start_pfn[nid] = max_pfn; |
Eric Sesterhenn | 8d8f3cb | 2006-10-03 23:34:58 +0200 | [diff] [blame] | 146 | BUG_ON(node_start_pfn[nid] > node_end_pfn[nid]); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 147 | } |
| 148 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 149 | /* |
| 150 | * Allocate memory for the pg_data_t for this node via a crude pre-bootmem |
| 151 | * method. For node zero take this from the bottom of memory, for |
| 152 | * subsequent nodes place them at node_remap_start_vaddr which contains |
| 153 | * node local data in physically node local memory. See setup_memory() |
| 154 | * for details. |
| 155 | */ |
| 156 | static void __init allocate_pgdat(int nid) |
| 157 | { |
Yinghai Lu | 996cf44 | 2008-06-30 18:34:58 -0700 | [diff] [blame] | 158 | char buf[16]; |
| 159 | |
| 160 | if (node_has_online_mem(nid) && node_remap_start_vaddr[nid]) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 161 | NODE_DATA(nid) = (pg_data_t *)node_remap_start_vaddr[nid]; |
| 162 | else { |
Yinghai Lu | 1638729 | 2008-05-29 12:57:22 -0700 | [diff] [blame] | 163 | unsigned long pgdat_phys; |
| 164 | pgdat_phys = find_e820_area(min_low_pfn<<PAGE_SHIFT, |
Yinghai Lu | 996cf44 | 2008-06-30 18:34:58 -0700 | [diff] [blame] | 165 | max_pfn_mapped<<PAGE_SHIFT, |
Yinghai Lu | 6af61a7 | 2008-06-01 23:53:50 -0700 | [diff] [blame] | 166 | sizeof(pg_data_t), |
Yinghai Lu | 1638729 | 2008-05-29 12:57:22 -0700 | [diff] [blame] | 167 | PAGE_SIZE); |
| 168 | NODE_DATA(nid) = (pg_data_t *)(pfn_to_kaddr(pgdat_phys>>PAGE_SHIFT)); |
Yinghai Lu | 996cf44 | 2008-06-30 18:34:58 -0700 | [diff] [blame] | 169 | memset(buf, 0, sizeof(buf)); |
| 170 | sprintf(buf, "NODE_DATA %d", nid); |
| 171 | reserve_early(pgdat_phys, pgdat_phys + sizeof(pg_data_t), buf); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 172 | } |
Yinghai Lu | e8c27ac | 2008-06-01 13:15:22 -0700 | [diff] [blame] | 173 | printk(KERN_DEBUG "allocate_pgdat: node %d NODE_DATA %08lx\n", |
| 174 | nid, (unsigned long)NODE_DATA(nid)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 175 | } |
| 176 | |
Mel Gorman | 1b000a5 | 2008-01-30 13:33:25 +0100 | [diff] [blame] | 177 | /* |
Andy Whitcroft | b9ada42 | 2008-05-20 11:01:08 +0100 | [diff] [blame] | 178 | * In the DISCONTIGMEM and SPARSEMEM memory model, a portion of the kernel |
| 179 | * virtual address space (KVA) is reserved and portions of nodes are mapped |
| 180 | * using it. This is to allow node-local memory to be allocated for |
| 181 | * structures that would normally require ZONE_NORMAL. The memory is |
| 182 | * allocated with alloc_remap() and callers should be prepared to allocate |
| 183 | * from the bootmem allocator instead. |
Mel Gorman | 1b000a5 | 2008-01-30 13:33:25 +0100 | [diff] [blame] | 184 | */ |
| 185 | static unsigned long node_remap_start_pfn[MAX_NUMNODES]; |
| 186 | static void *node_remap_end_vaddr[MAX_NUMNODES]; |
| 187 | static void *node_remap_alloc_vaddr[MAX_NUMNODES]; |
| 188 | static unsigned long node_remap_offset[MAX_NUMNODES]; |
| 189 | |
Dave Hansen | 6f167ec | 2005-06-23 00:07:39 -0700 | [diff] [blame] | 190 | void *alloc_remap(int nid, unsigned long size) |
| 191 | { |
| 192 | void *allocation = node_remap_alloc_vaddr[nid]; |
| 193 | |
| 194 | size = ALIGN(size, L1_CACHE_BYTES); |
| 195 | |
| 196 | if (!allocation || (allocation + size) >= node_remap_end_vaddr[nid]) |
Hannes Eder | 2366c29 | 2009-02-22 01:01:13 +0100 | [diff] [blame] | 197 | return NULL; |
Dave Hansen | 6f167ec | 2005-06-23 00:07:39 -0700 | [diff] [blame] | 198 | |
| 199 | node_remap_alloc_vaddr[nid] += size; |
| 200 | memset(allocation, 0, size); |
| 201 | |
| 202 | return allocation; |
| 203 | } |
| 204 | |
Yinghai Lu | 3a58a2a6 | 2008-06-24 12:19:41 -0700 | [diff] [blame] | 205 | static void __init remap_numa_kva(void) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 206 | { |
| 207 | void *vaddr; |
| 208 | unsigned long pfn; |
| 209 | int node; |
| 210 | |
| 211 | for_each_online_node(node) { |
Yinghai Lu | e8c27ac | 2008-06-01 13:15:22 -0700 | [diff] [blame] | 212 | printk(KERN_DEBUG "remap_numa_kva: node %d\n", node); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 213 | for (pfn=0; pfn < node_remap_size[node]; pfn += PTRS_PER_PTE) { |
| 214 | vaddr = node_remap_start_vaddr[node]+(pfn<<PAGE_SHIFT); |
Yinghai Lu | e8c27ac | 2008-06-01 13:15:22 -0700 | [diff] [blame] | 215 | printk(KERN_DEBUG "remap_numa_kva: %08lx to pfn %08lx\n", |
| 216 | (unsigned long)vaddr, |
| 217 | node_remap_start_pfn[node] + pfn); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 218 | set_pmd_pfn((ulong) vaddr, |
| 219 | node_remap_start_pfn[node] + pfn, |
| 220 | PAGE_KERNEL_LARGE); |
| 221 | } |
| 222 | } |
| 223 | } |
| 224 | |
Rafael J. Wysocki | 97a70e5 | 2008-11-12 23:22:35 +0100 | [diff] [blame] | 225 | #ifdef CONFIG_HIBERNATION |
| 226 | /** |
| 227 | * resume_map_numa_kva - add KVA mapping to the temporary page tables created |
| 228 | * during resume from hibernation |
| 229 | * @pgd_base - temporary resume page directory |
| 230 | */ |
| 231 | void resume_map_numa_kva(pgd_t *pgd_base) |
| 232 | { |
| 233 | int node; |
| 234 | |
| 235 | for_each_online_node(node) { |
| 236 | unsigned long start_va, start_pfn, size, pfn; |
| 237 | |
| 238 | start_va = (unsigned long)node_remap_start_vaddr[node]; |
| 239 | start_pfn = node_remap_start_pfn[node]; |
| 240 | size = node_remap_size[node]; |
| 241 | |
Harvey Harrison | 9b4778f | 2009-01-07 14:42:41 -0800 | [diff] [blame] | 242 | printk(KERN_DEBUG "%s: node %d\n", __func__, node); |
Rafael J. Wysocki | 97a70e5 | 2008-11-12 23:22:35 +0100 | [diff] [blame] | 243 | |
| 244 | for (pfn = 0; pfn < size; pfn += PTRS_PER_PTE) { |
| 245 | unsigned long vaddr = start_va + (pfn << PAGE_SHIFT); |
| 246 | pgd_t *pgd = pgd_base + pgd_index(vaddr); |
| 247 | pud_t *pud = pud_offset(pgd, vaddr); |
| 248 | pmd_t *pmd = pmd_offset(pud, vaddr); |
| 249 | |
| 250 | set_pmd(pmd, pfn_pmd(start_pfn + pfn, |
| 251 | PAGE_KERNEL_LARGE_EXEC)); |
| 252 | |
| 253 | printk(KERN_DEBUG "%s: %08lx -> pfn %08lx\n", |
Harvey Harrison | 9b4778f | 2009-01-07 14:42:41 -0800 | [diff] [blame] | 254 | __func__, vaddr, start_pfn + pfn); |
Rafael J. Wysocki | 97a70e5 | 2008-11-12 23:22:35 +0100 | [diff] [blame] | 255 | } |
| 256 | } |
| 257 | } |
| 258 | #endif |
| 259 | |
Jaswinder Singh Rajput | a81b631 | 2009-04-17 23:31:20 +0530 | [diff] [blame] | 260 | static __init unsigned long calculate_numa_remap_pages(void) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 261 | { |
| 262 | int nid; |
| 263 | unsigned long size, reserve_pages = 0; |
| 264 | |
| 265 | for_each_online_node(nid) { |
Yinghai Lu | cc1050b | 2008-06-13 19:08:52 -0700 | [diff] [blame] | 266 | u64 node_kva_target; |
| 267 | u64 node_kva_final; |
Mel Gorman | 4cfee88 | 2006-09-27 01:49:51 -0700 | [diff] [blame] | 268 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 269 | /* |
| 270 | * The acpi/srat node info can show hot-add memroy zones |
| 271 | * where memory could be added but not currently present. |
| 272 | */ |
Yinghai Lu | c094345 | 2008-06-23 16:41:30 -0700 | [diff] [blame] | 273 | printk(KERN_DEBUG "node %d pfn: [%lx - %lx]\n", |
Yinghai Lu | 9043f00 | 2008-06-06 18:53:33 -0700 | [diff] [blame] | 274 | nid, node_start_pfn[nid], node_end_pfn[nid]); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 275 | if (node_start_pfn[nid] > max_pfn) |
| 276 | continue; |
Yinghai Lu | 9043f00 | 2008-06-06 18:53:33 -0700 | [diff] [blame] | 277 | if (!node_end_pfn[nid]) |
| 278 | continue; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 279 | if (node_end_pfn[nid] > max_pfn) |
| 280 | node_end_pfn[nid] = max_pfn; |
| 281 | |
| 282 | /* ensure the remap includes space for the pgdat. */ |
| 283 | size = node_remap_size[nid] + sizeof(pg_data_t); |
| 284 | |
| 285 | /* convert size to large (pmd size) pages, rounding up */ |
| 286 | size = (size + LARGE_PAGE_BYTES - 1) / LARGE_PAGE_BYTES; |
| 287 | /* now the roundup is correct, convert to PAGE_SIZE pages */ |
| 288 | size = size * PTRS_PER_PTE; |
Dave Hansen | 5b505b9 | 2005-06-23 00:07:41 -0700 | [diff] [blame] | 289 | |
Yinghai Lu | cc1050b | 2008-06-13 19:08:52 -0700 | [diff] [blame] | 290 | node_kva_target = round_down(node_end_pfn[nid] - size, |
Yinghai Lu | 9043f00 | 2008-06-06 18:53:33 -0700 | [diff] [blame] | 291 | PTRS_PER_PTE); |
Yinghai Lu | cc1050b | 2008-06-13 19:08:52 -0700 | [diff] [blame] | 292 | node_kva_target <<= PAGE_SHIFT; |
Yinghai Lu | 9043f00 | 2008-06-06 18:53:33 -0700 | [diff] [blame] | 293 | do { |
Yinghai Lu | cc1050b | 2008-06-13 19:08:52 -0700 | [diff] [blame] | 294 | node_kva_final = find_e820_area(node_kva_target, |
Yinghai Lu | 9043f00 | 2008-06-06 18:53:33 -0700 | [diff] [blame] | 295 | ((u64)node_end_pfn[nid])<<PAGE_SHIFT, |
| 296 | ((u64)size)<<PAGE_SHIFT, |
| 297 | LARGE_PAGE_BYTES); |
Yinghai Lu | cc1050b | 2008-06-13 19:08:52 -0700 | [diff] [blame] | 298 | node_kva_target -= LARGE_PAGE_BYTES; |
| 299 | } while (node_kva_final == -1ULL && |
| 300 | (node_kva_target>>PAGE_SHIFT) > (node_start_pfn[nid])); |
Dave Hansen | 5b505b9 | 2005-06-23 00:07:41 -0700 | [diff] [blame] | 301 | |
Yinghai Lu | cc1050b | 2008-06-13 19:08:52 -0700 | [diff] [blame] | 302 | if (node_kva_final == -1ULL) |
Yinghai Lu | 9043f00 | 2008-06-06 18:53:33 -0700 | [diff] [blame] | 303 | panic("Can not get kva ram\n"); |
Dave Hansen | 5b505b9 | 2005-06-23 00:07:41 -0700 | [diff] [blame] | 304 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 305 | node_remap_size[nid] = size; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 306 | node_remap_offset[nid] = reserve_pages; |
Dave Hansen | 6f167ec | 2005-06-23 00:07:39 -0700 | [diff] [blame] | 307 | reserve_pages += size; |
Yinghai Lu | c094345 | 2008-06-23 16:41:30 -0700 | [diff] [blame] | 308 | printk(KERN_DEBUG "Reserving %ld pages of KVA for lmem_map of" |
| 309 | " node %d at %llx\n", |
Yinghai Lu | cc1050b | 2008-06-13 19:08:52 -0700 | [diff] [blame] | 310 | size, nid, node_kva_final>>PAGE_SHIFT); |
Ravikiran G Thirumalai | 4b0271e | 2005-08-07 09:42:50 -0700 | [diff] [blame] | 311 | |
Yinghai Lu | 9043f00 | 2008-06-06 18:53:33 -0700 | [diff] [blame] | 312 | /* |
| 313 | * prevent kva address below max_low_pfn want it on system |
| 314 | * with less memory later. |
| 315 | * layout will be: KVA address , KVA RAM |
Yinghai Lu | cc1050b | 2008-06-13 19:08:52 -0700 | [diff] [blame] | 316 | * |
| 317 | * we are supposed to only record the one less then max_low_pfn |
| 318 | * but we could have some hole in high memory, and it will only |
| 319 | * check page_is_ram(pfn) && !page_is_reserved_early(pfn) to decide |
| 320 | * to use it as free. |
| 321 | * So reserve_early here, hope we don't run out of that array |
Yinghai Lu | 9043f00 | 2008-06-06 18:53:33 -0700 | [diff] [blame] | 322 | */ |
Yinghai Lu | cc1050b | 2008-06-13 19:08:52 -0700 | [diff] [blame] | 323 | reserve_early(node_kva_final, |
| 324 | node_kva_final+(((u64)size)<<PAGE_SHIFT), |
| 325 | "KVA RAM"); |
Ravikiran G Thirumalai | 4b0271e | 2005-08-07 09:42:50 -0700 | [diff] [blame] | 326 | |
Yinghai Lu | cc1050b | 2008-06-13 19:08:52 -0700 | [diff] [blame] | 327 | node_remap_start_pfn[nid] = node_kva_final>>PAGE_SHIFT; |
| 328 | remove_active_range(nid, node_remap_start_pfn[nid], |
| 329 | node_remap_start_pfn[nid] + size); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 330 | } |
Yinghai Lu | c094345 | 2008-06-23 16:41:30 -0700 | [diff] [blame] | 331 | printk(KERN_INFO "Reserving total of %lx pages for numa KVA remap\n", |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 332 | reserve_pages); |
| 333 | return reserve_pages; |
| 334 | } |
| 335 | |
Mel Gorman | 1b000a5 | 2008-01-30 13:33:25 +0100 | [diff] [blame] | 336 | static void init_remap_allocator(int nid) |
| 337 | { |
| 338 | node_remap_start_vaddr[nid] = pfn_to_kaddr( |
| 339 | kva_start_pfn + node_remap_offset[nid]); |
| 340 | node_remap_end_vaddr[nid] = node_remap_start_vaddr[nid] + |
| 341 | (node_remap_size[nid] * PAGE_SIZE); |
| 342 | node_remap_alloc_vaddr[nid] = node_remap_start_vaddr[nid] + |
| 343 | ALIGN(sizeof(pg_data_t), PAGE_SIZE); |
| 344 | |
Yinghai Lu | c094345 | 2008-06-23 16:41:30 -0700 | [diff] [blame] | 345 | printk(KERN_DEBUG "node %d will remap to vaddr %08lx - %08lx\n", nid, |
Mel Gorman | 1b000a5 | 2008-01-30 13:33:25 +0100 | [diff] [blame] | 346 | (ulong) node_remap_start_vaddr[nid], |
Yinghai Lu | e8c27ac | 2008-06-01 13:15:22 -0700 | [diff] [blame] | 347 | (ulong) node_remap_end_vaddr[nid]); |
Mel Gorman | 1b000a5 | 2008-01-30 13:33:25 +0100 | [diff] [blame] | 348 | } |
Mel Gorman | 1b000a5 | 2008-01-30 13:33:25 +0100 | [diff] [blame] | 349 | |
Yinghai Lu | 2ec65f8 | 2008-06-23 03:05:30 -0700 | [diff] [blame] | 350 | void __init initmem_init(unsigned long start_pfn, |
Yinghai Lu | b2ac82a | 2008-06-22 02:45:39 -0700 | [diff] [blame] | 351 | unsigned long end_pfn) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 352 | { |
| 353 | int nid; |
Yinghai Lu | 84b56fa | 2008-06-03 19:32:30 -0700 | [diff] [blame] | 354 | long kva_target_pfn; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 355 | |
| 356 | /* |
| 357 | * When mapping a NUMA machine we allocate the node_mem_map arrays |
| 358 | * from node local memory. They are then mapped directly into KVA |
| 359 | * between zone normal and vmalloc space. Calculate the size of |
Simon Arlott | 27b46d7 | 2007-10-20 01:13:56 +0200 | [diff] [blame] | 360 | * this space and use it to adjust the boundary between ZONE_NORMAL |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 361 | * and ZONE_HIGHMEM. |
| 362 | */ |
Yinghai Lu | 7b2a0a6 | 2008-06-03 19:35:04 -0700 | [diff] [blame] | 363 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 364 | get_memcfg_numa(); |
| 365 | |
Joerg Roedel | 17f3ab7 | 2008-07-25 16:48:59 +0200 | [diff] [blame] | 366 | kva_pages = roundup(calculate_numa_remap_pages(), PTRS_PER_PTE); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 367 | |
Yinghai Lu | 84b56fa | 2008-06-03 19:32:30 -0700 | [diff] [blame] | 368 | kva_target_pfn = round_down(max_low_pfn - kva_pages, PTRS_PER_PTE); |
| 369 | do { |
| 370 | kva_start_pfn = find_e820_area(kva_target_pfn<<PAGE_SHIFT, |
| 371 | max_low_pfn<<PAGE_SHIFT, |
| 372 | kva_pages<<PAGE_SHIFT, |
| 373 | PTRS_PER_PTE<<PAGE_SHIFT) >> PAGE_SHIFT; |
| 374 | kva_target_pfn -= PTRS_PER_PTE; |
| 375 | } while (kva_start_pfn == -1UL && kva_target_pfn > min_low_pfn); |
keith mannthey | 9102330 | 2006-09-25 23:31:03 -0700 | [diff] [blame] | 376 | |
Yinghai Lu | 84b56fa | 2008-06-03 19:32:30 -0700 | [diff] [blame] | 377 | if (kva_start_pfn == -1UL) |
| 378 | panic("Can not get kva space\n"); |
Mel Gorman | bac4894 | 2008-01-30 13:32:54 +0100 | [diff] [blame] | 379 | |
Yinghai Lu | c094345 | 2008-06-23 16:41:30 -0700 | [diff] [blame] | 380 | printk(KERN_INFO "kva_start_pfn ~ %lx max_low_pfn ~ %lx\n", |
keith mannthey | 9102330 | 2006-09-25 23:31:03 -0700 | [diff] [blame] | 381 | kva_start_pfn, max_low_pfn); |
Yinghai Lu | c094345 | 2008-06-23 16:41:30 -0700 | [diff] [blame] | 382 | printk(KERN_INFO "max_pfn = %lx\n", max_pfn); |
Yinghai Lu | a548128 | 2008-05-29 12:58:37 -0700 | [diff] [blame] | 383 | |
| 384 | /* avoid clash with initrd */ |
| 385 | reserve_early(kva_start_pfn<<PAGE_SHIFT, |
| 386 | (kva_start_pfn + kva_pages)<<PAGE_SHIFT, |
| 387 | "KVA PG"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 388 | #ifdef CONFIG_HIGHMEM |
| 389 | highstart_pfn = highend_pfn = max_pfn; |
Yinghai Lu | 2ec65f8 | 2008-06-23 03:05:30 -0700 | [diff] [blame] | 390 | if (max_pfn > max_low_pfn) |
| 391 | highstart_pfn = max_low_pfn; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 392 | printk(KERN_NOTICE "%ldMB HIGHMEM available.\n", |
| 393 | pages_to_mb(highend_pfn - highstart_pfn)); |
Jan Beulich | ba9c231 | 2006-09-26 10:52:31 +0200 | [diff] [blame] | 394 | num_physpages = highend_pfn; |
| 395 | high_memory = (void *) __va(highstart_pfn * PAGE_SIZE - 1) + 1; |
| 396 | #else |
Yinghai Lu | 2ec65f8 | 2008-06-23 03:05:30 -0700 | [diff] [blame] | 397 | num_physpages = max_low_pfn; |
| 398 | high_memory = (void *) __va(max_low_pfn * PAGE_SIZE - 1) + 1; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 399 | #endif |
| 400 | printk(KERN_NOTICE "%ldMB LOWMEM available.\n", |
Yinghai Lu | 2ec65f8 | 2008-06-23 03:05:30 -0700 | [diff] [blame] | 401 | pages_to_mb(max_low_pfn)); |
Yinghai Lu | c094345 | 2008-06-23 16:41:30 -0700 | [diff] [blame] | 402 | printk(KERN_DEBUG "max_low_pfn = %lx, highstart_pfn = %lx\n", |
| 403 | max_low_pfn, highstart_pfn); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 404 | |
Yinghai Lu | c094345 | 2008-06-23 16:41:30 -0700 | [diff] [blame] | 405 | printk(KERN_DEBUG "Low memory ends at vaddr %08lx\n", |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 406 | (ulong) pfn_to_kaddr(max_low_pfn)); |
| 407 | for_each_online_node(nid) { |
Mel Gorman | 1b000a5 | 2008-01-30 13:33:25 +0100 | [diff] [blame] | 408 | init_remap_allocator(nid); |
Dave Hansen | 6f167ec | 2005-06-23 00:07:39 -0700 | [diff] [blame] | 409 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 410 | allocate_pgdat(nid); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 411 | } |
Yinghai Lu | 3a58a2a6 | 2008-06-24 12:19:41 -0700 | [diff] [blame] | 412 | remap_numa_kva(); |
| 413 | |
Yinghai Lu | c094345 | 2008-06-23 16:41:30 -0700 | [diff] [blame] | 414 | printk(KERN_DEBUG "High memory starts at vaddr %08lx\n", |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 415 | (ulong) pfn_to_kaddr(highstart_pfn)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 416 | for_each_online_node(nid) |
Ingo Molnar | fa5c463 | 2008-04-16 02:29:42 +0200 | [diff] [blame] | 417 | propagate_e820_map_node(nid); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 418 | |
Yinghai Lu | a71edd1 | 2009-03-04 01:22:35 -0800 | [diff] [blame] | 419 | for_each_online_node(nid) { |
Yinghai Lu | 3a58a2a6 | 2008-06-24 12:19:41 -0700 | [diff] [blame] | 420 | memset(NODE_DATA(nid), 0, sizeof(struct pglist_data)); |
Yinghai Lu | a71edd1 | 2009-03-04 01:22:35 -0800 | [diff] [blame] | 421 | NODE_DATA(nid)->bdata = &bootmem_node_data[nid]; |
| 422 | } |
Yinghai Lu | 3a58a2a6 | 2008-06-24 12:19:41 -0700 | [diff] [blame] | 423 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 424 | setup_bootmem_allocator(); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 425 | } |
| 426 | |
Yasunori Goto | 7c7e942 | 2006-12-22 01:11:13 -0800 | [diff] [blame] | 427 | #ifdef CONFIG_MEMORY_HOTPLUG |
Adrian Bunk | fb8c177 | 2007-10-24 18:24:47 +0200 | [diff] [blame] | 428 | static int paddr_to_nid(u64 addr) |
Yasunori Goto | 7c7e942 | 2006-12-22 01:11:13 -0800 | [diff] [blame] | 429 | { |
| 430 | int nid; |
| 431 | unsigned long pfn = PFN_DOWN(addr); |
| 432 | |
| 433 | for_each_node(nid) |
| 434 | if (node_start_pfn[nid] <= pfn && |
| 435 | pfn < node_end_pfn[nid]) |
| 436 | return nid; |
| 437 | |
| 438 | return -1; |
| 439 | } |
| 440 | |
| 441 | /* |
| 442 | * This function is used to ask node id BEFORE memmap and mem_section's |
| 443 | * initialization (pfn_to_nid() can't be used yet). |
| 444 | * If _PXM is not defined on ACPI's DSDT, node id must be found by this. |
| 445 | */ |
| 446 | int memory_add_physaddr_to_nid(u64 addr) |
| 447 | { |
| 448 | int nid = paddr_to_nid(addr); |
| 449 | return (nid >= 0) ? nid : 0; |
| 450 | } |
| 451 | |
| 452 | EXPORT_SYMBOL_GPL(memory_add_physaddr_to_nid); |
| 453 | #endif |
Ingo Molnar | 2772f54 | 2008-06-03 10:09:45 +0200 | [diff] [blame] | 454 | |