Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1 | /* |
| 2 | * Copyright (c) 2000, 2003 Silicon Graphics, Inc. All rights reserved. |
| 3 | * Copyright (c) 2001 Intel Corp. |
| 4 | * Copyright (c) 2001 Tony Luck <tony.luck@intel.com> |
| 5 | * Copyright (c) 2002 NEC Corp. |
| 6 | * Copyright (c) 2002 Kimio Suganuma <k-suganuma@da.jp.nec.com> |
| 7 | * Copyright (c) 2004 Silicon Graphics, Inc |
| 8 | * Russ Anderson <rja@sgi.com> |
| 9 | * Jesse Barnes <jbarnes@sgi.com> |
| 10 | * Jack Steiner <steiner@sgi.com> |
| 11 | */ |
| 12 | |
| 13 | /* |
| 14 | * Platform initialization for Discontig Memory |
| 15 | */ |
| 16 | |
| 17 | #include <linux/kernel.h> |
| 18 | #include <linux/mm.h> |
| 19 | #include <linux/swap.h> |
| 20 | #include <linux/bootmem.h> |
| 21 | #include <linux/acpi.h> |
| 22 | #include <linux/efi.h> |
| 23 | #include <linux/nodemask.h> |
| 24 | #include <asm/pgalloc.h> |
| 25 | #include <asm/tlb.h> |
| 26 | #include <asm/meminit.h> |
| 27 | #include <asm/numa.h> |
| 28 | #include <asm/sections.h> |
| 29 | |
| 30 | /* |
| 31 | * Track per-node information needed to setup the boot memory allocator, the |
| 32 | * per-node areas, and the real VM. |
| 33 | */ |
| 34 | struct early_node_data { |
| 35 | struct ia64_node_data *node_data; |
| 36 | pg_data_t *pgdat; |
| 37 | unsigned long pernode_addr; |
| 38 | unsigned long pernode_size; |
| 39 | struct bootmem_data bootmem_data; |
| 40 | unsigned long num_physpages; |
| 41 | unsigned long num_dma_physpages; |
| 42 | unsigned long min_pfn; |
| 43 | unsigned long max_pfn; |
| 44 | }; |
| 45 | |
| 46 | static struct early_node_data mem_data[MAX_NUMNODES] __initdata; |
bob.picco | 564601a | 2005-06-30 09:52:00 -0700 | [diff] [blame] | 47 | static nodemask_t memory_less_mask __initdata; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 48 | |
| 49 | /* |
| 50 | * To prevent cache aliasing effects, align per-node structures so that they |
| 51 | * start at addresses that are strided by node number. |
| 52 | */ |
Jack Steiner | acb7f67 | 2005-12-05 13:56:50 -0600 | [diff] [blame] | 53 | #define MAX_NODE_ALIGN_OFFSET (32 * 1024 * 1024) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 54 | #define NODEDATA_ALIGN(addr, node) \ |
Jack Steiner | acb7f67 | 2005-12-05 13:56:50 -0600 | [diff] [blame] | 55 | ((((addr) + 1024*1024-1) & ~(1024*1024-1)) + \ |
| 56 | (((node)*PERCPU_PAGE_SIZE) & (MAX_NODE_ALIGN_OFFSET - 1))) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 57 | |
| 58 | /** |
| 59 | * build_node_maps - callback to setup bootmem structs for each node |
| 60 | * @start: physical start of range |
| 61 | * @len: length of range |
| 62 | * @node: node where this range resides |
| 63 | * |
| 64 | * We allocate a struct bootmem_data for each piece of memory that we wish to |
| 65 | * treat as a virtually contiguous block (i.e. each node). Each such block |
| 66 | * must start on an %IA64_GRANULE_SIZE boundary, so we round the address down |
| 67 | * if necessary. Any non-existent pages will simply be part of the virtual |
| 68 | * memmap. We also update min_low_pfn and max_low_pfn here as we receive |
| 69 | * memory ranges from the caller. |
| 70 | */ |
| 71 | static int __init build_node_maps(unsigned long start, unsigned long len, |
| 72 | int node) |
| 73 | { |
| 74 | unsigned long cstart, epfn, end = start + len; |
| 75 | struct bootmem_data *bdp = &mem_data[node].bootmem_data; |
| 76 | |
| 77 | epfn = GRANULEROUNDUP(end) >> PAGE_SHIFT; |
| 78 | cstart = GRANULEROUNDDOWN(start); |
| 79 | |
| 80 | if (!bdp->node_low_pfn) { |
| 81 | bdp->node_boot_start = cstart; |
| 82 | bdp->node_low_pfn = epfn; |
| 83 | } else { |
| 84 | bdp->node_boot_start = min(cstart, bdp->node_boot_start); |
| 85 | bdp->node_low_pfn = max(epfn, bdp->node_low_pfn); |
| 86 | } |
| 87 | |
| 88 | min_low_pfn = min(min_low_pfn, bdp->node_boot_start>>PAGE_SHIFT); |
| 89 | max_low_pfn = max(max_low_pfn, bdp->node_low_pfn); |
| 90 | |
| 91 | return 0; |
| 92 | } |
| 93 | |
| 94 | /** |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 95 | * early_nr_cpus_node - return number of cpus on a given node |
| 96 | * @node: node to check |
| 97 | * |
| 98 | * Count the number of cpus on @node. We can't use nr_cpus_node() yet because |
| 99 | * acpi_boot_init() (which builds the node_to_cpu_mask array) hasn't been |
| 100 | * called yet. Note that node 0 will also count all non-existent cpus. |
| 101 | */ |
bob.picco | 564601a | 2005-06-30 09:52:00 -0700 | [diff] [blame] | 102 | static int __init early_nr_cpus_node(int node) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 103 | { |
| 104 | int cpu, n = 0; |
| 105 | |
| 106 | for (cpu = 0; cpu < NR_CPUS; cpu++) |
| 107 | if (node == node_cpuid[cpu].nid) |
| 108 | n++; |
| 109 | |
| 110 | return n; |
| 111 | } |
| 112 | |
| 113 | /** |
bob.picco | 564601a | 2005-06-30 09:52:00 -0700 | [diff] [blame] | 114 | * compute_pernodesize - compute size of pernode data |
| 115 | * @node: the node id. |
| 116 | */ |
| 117 | static unsigned long __init compute_pernodesize(int node) |
| 118 | { |
| 119 | unsigned long pernodesize = 0, cpus; |
| 120 | |
| 121 | cpus = early_nr_cpus_node(node); |
| 122 | pernodesize += PERCPU_PAGE_SIZE * cpus; |
| 123 | pernodesize += node * L1_CACHE_BYTES; |
| 124 | pernodesize += L1_CACHE_ALIGN(sizeof(pg_data_t)); |
| 125 | pernodesize += L1_CACHE_ALIGN(sizeof(struct ia64_node_data)); |
| 126 | pernodesize = PAGE_ALIGN(pernodesize); |
| 127 | return pernodesize; |
| 128 | } |
| 129 | |
| 130 | /** |
Tony Luck | 8d7e351 | 2005-07-06 18:18:10 -0700 | [diff] [blame] | 131 | * per_cpu_node_setup - setup per-cpu areas on each node |
| 132 | * @cpu_data: per-cpu area on this node |
| 133 | * @node: node to setup |
| 134 | * |
| 135 | * Copy the static per-cpu data into the region we just set aside and then |
| 136 | * setup __per_cpu_offset for each CPU on this node. Return a pointer to |
| 137 | * the end of the area. |
| 138 | */ |
| 139 | static void *per_cpu_node_setup(void *cpu_data, int node) |
| 140 | { |
| 141 | #ifdef CONFIG_SMP |
| 142 | int cpu; |
| 143 | |
| 144 | for (cpu = 0; cpu < NR_CPUS; cpu++) { |
| 145 | if (node == node_cpuid[cpu].nid) { |
| 146 | memcpy(__va(cpu_data), __phys_per_cpu_start, |
| 147 | __per_cpu_end - __per_cpu_start); |
| 148 | __per_cpu_offset[cpu] = (char*)__va(cpu_data) - |
| 149 | __per_cpu_start; |
| 150 | cpu_data += PERCPU_PAGE_SIZE; |
| 151 | } |
| 152 | } |
| 153 | #endif |
| 154 | return cpu_data; |
| 155 | } |
| 156 | |
| 157 | /** |
bob.picco | 564601a | 2005-06-30 09:52:00 -0700 | [diff] [blame] | 158 | * fill_pernode - initialize pernode data. |
| 159 | * @node: the node id. |
| 160 | * @pernode: physical address of pernode data |
| 161 | * @pernodesize: size of the pernode data |
| 162 | */ |
| 163 | static void __init fill_pernode(int node, unsigned long pernode, |
| 164 | unsigned long pernodesize) |
| 165 | { |
| 166 | void *cpu_data; |
Tony Luck | 8d7e351 | 2005-07-06 18:18:10 -0700 | [diff] [blame] | 167 | int cpus = early_nr_cpus_node(node); |
bob.picco | 564601a | 2005-06-30 09:52:00 -0700 | [diff] [blame] | 168 | struct bootmem_data *bdp = &mem_data[node].bootmem_data; |
| 169 | |
| 170 | mem_data[node].pernode_addr = pernode; |
| 171 | mem_data[node].pernode_size = pernodesize; |
| 172 | memset(__va(pernode), 0, pernodesize); |
| 173 | |
| 174 | cpu_data = (void *)pernode; |
| 175 | pernode += PERCPU_PAGE_SIZE * cpus; |
| 176 | pernode += node * L1_CACHE_BYTES; |
| 177 | |
| 178 | mem_data[node].pgdat = __va(pernode); |
| 179 | pernode += L1_CACHE_ALIGN(sizeof(pg_data_t)); |
| 180 | |
| 181 | mem_data[node].node_data = __va(pernode); |
| 182 | pernode += L1_CACHE_ALIGN(sizeof(struct ia64_node_data)); |
| 183 | |
| 184 | mem_data[node].pgdat->bdata = bdp; |
| 185 | pernode += L1_CACHE_ALIGN(sizeof(pg_data_t)); |
| 186 | |
Tony Luck | 8d7e351 | 2005-07-06 18:18:10 -0700 | [diff] [blame] | 187 | cpu_data = per_cpu_node_setup(cpu_data, node); |
bob.picco | 564601a | 2005-06-30 09:52:00 -0700 | [diff] [blame] | 188 | |
| 189 | return; |
| 190 | } |
Tony Luck | 8d7e351 | 2005-07-06 18:18:10 -0700 | [diff] [blame] | 191 | |
bob.picco | 564601a | 2005-06-30 09:52:00 -0700 | [diff] [blame] | 192 | /** |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 193 | * find_pernode_space - allocate memory for memory map and per-node structures |
| 194 | * @start: physical start of range |
| 195 | * @len: length of range |
| 196 | * @node: node where this range resides |
| 197 | * |
| 198 | * This routine reserves space for the per-cpu data struct, the list of |
| 199 | * pg_data_ts and the per-node data struct. Each node will have something like |
| 200 | * the following in the first chunk of addr. space large enough to hold it. |
| 201 | * |
| 202 | * ________________________ |
| 203 | * | | |
| 204 | * |~~~~~~~~~~~~~~~~~~~~~~~~| <-- NODEDATA_ALIGN(start, node) for the first |
| 205 | * | PERCPU_PAGE_SIZE * | start and length big enough |
| 206 | * | cpus_on_this_node | Node 0 will also have entries for all non-existent cpus. |
| 207 | * |------------------------| |
| 208 | * | local pg_data_t * | |
| 209 | * |------------------------| |
| 210 | * | local ia64_node_data | |
| 211 | * |------------------------| |
| 212 | * | ??? | |
| 213 | * |________________________| |
| 214 | * |
| 215 | * Once this space has been set aside, the bootmem maps are initialized. We |
| 216 | * could probably move the allocation of the per-cpu and ia64_node_data space |
| 217 | * outside of this function and use alloc_bootmem_node(), but doing it here |
| 218 | * is straightforward and we get the alignments we want so... |
| 219 | */ |
| 220 | static int __init find_pernode_space(unsigned long start, unsigned long len, |
| 221 | int node) |
| 222 | { |
bob.picco | 564601a | 2005-06-30 09:52:00 -0700 | [diff] [blame] | 223 | unsigned long epfn; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 224 | unsigned long pernodesize = 0, pernode, pages, mapsize; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 225 | struct bootmem_data *bdp = &mem_data[node].bootmem_data; |
| 226 | |
| 227 | epfn = (start + len) >> PAGE_SHIFT; |
| 228 | |
| 229 | pages = bdp->node_low_pfn - (bdp->node_boot_start >> PAGE_SHIFT); |
| 230 | mapsize = bootmem_bootmap_pages(pages) << PAGE_SHIFT; |
| 231 | |
| 232 | /* |
| 233 | * Make sure this memory falls within this node's usable memory |
| 234 | * since we may have thrown some away in build_maps(). |
| 235 | */ |
| 236 | if (start < bdp->node_boot_start || epfn > bdp->node_low_pfn) |
| 237 | return 0; |
| 238 | |
| 239 | /* Don't setup this node's local space twice... */ |
| 240 | if (mem_data[node].pernode_addr) |
| 241 | return 0; |
| 242 | |
| 243 | /* |
| 244 | * Calculate total size needed, incl. what's necessary |
| 245 | * for good alignment and alias prevention. |
| 246 | */ |
bob.picco | 564601a | 2005-06-30 09:52:00 -0700 | [diff] [blame] | 247 | pernodesize = compute_pernodesize(node); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 248 | pernode = NODEDATA_ALIGN(start, node); |
| 249 | |
| 250 | /* Is this range big enough for what we want to store here? */ |
bob.picco | 564601a | 2005-06-30 09:52:00 -0700 | [diff] [blame] | 251 | if (start + len > (pernode + pernodesize + mapsize)) |
| 252 | fill_pernode(node, pernode, pernodesize); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 253 | |
| 254 | return 0; |
| 255 | } |
| 256 | |
| 257 | /** |
| 258 | * free_node_bootmem - free bootmem allocator memory for use |
| 259 | * @start: physical start of range |
| 260 | * @len: length of range |
| 261 | * @node: node where this range resides |
| 262 | * |
| 263 | * Simply calls the bootmem allocator to free the specified ranged from |
| 264 | * the given pg_data_t's bdata struct. After this function has been called |
| 265 | * for all the entries in the EFI memory map, the bootmem allocator will |
| 266 | * be ready to service allocation requests. |
| 267 | */ |
| 268 | static int __init free_node_bootmem(unsigned long start, unsigned long len, |
| 269 | int node) |
| 270 | { |
| 271 | free_bootmem_node(mem_data[node].pgdat, start, len); |
| 272 | |
| 273 | return 0; |
| 274 | } |
| 275 | |
| 276 | /** |
| 277 | * reserve_pernode_space - reserve memory for per-node space |
| 278 | * |
| 279 | * Reserve the space used by the bootmem maps & per-node space in the boot |
| 280 | * allocator so that when we actually create the real mem maps we don't |
| 281 | * use their memory. |
| 282 | */ |
| 283 | static void __init reserve_pernode_space(void) |
| 284 | { |
| 285 | unsigned long base, size, pages; |
| 286 | struct bootmem_data *bdp; |
| 287 | int node; |
| 288 | |
| 289 | for_each_online_node(node) { |
| 290 | pg_data_t *pdp = mem_data[node].pgdat; |
| 291 | |
bob.picco | 564601a | 2005-06-30 09:52:00 -0700 | [diff] [blame] | 292 | if (node_isset(node, memory_less_mask)) |
| 293 | continue; |
| 294 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 295 | bdp = pdp->bdata; |
| 296 | |
| 297 | /* First the bootmem_map itself */ |
| 298 | pages = bdp->node_low_pfn - (bdp->node_boot_start>>PAGE_SHIFT); |
| 299 | size = bootmem_bootmap_pages(pages) << PAGE_SHIFT; |
| 300 | base = __pa(bdp->node_bootmem_map); |
| 301 | reserve_bootmem_node(pdp, base, size); |
| 302 | |
| 303 | /* Now the per-node space */ |
| 304 | size = mem_data[node].pernode_size; |
| 305 | base = __pa(mem_data[node].pernode_addr); |
| 306 | reserve_bootmem_node(pdp, base, size); |
| 307 | } |
| 308 | } |
| 309 | |
| 310 | /** |
| 311 | * initialize_pernode_data - fixup per-cpu & per-node pointers |
| 312 | * |
| 313 | * Each node's per-node area has a copy of the global pg_data_t list, so |
| 314 | * we copy that to each node here, as well as setting the per-cpu pointer |
| 315 | * to the local node data structure. The active_cpus field of the per-node |
| 316 | * structure gets setup by the platform_cpu_init() function later. |
| 317 | */ |
| 318 | static void __init initialize_pernode_data(void) |
| 319 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 320 | pg_data_t *pgdat_list[MAX_NUMNODES]; |
Tony Luck | 8d7e351 | 2005-07-06 18:18:10 -0700 | [diff] [blame] | 321 | int cpu, node; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 322 | |
| 323 | for_each_online_node(node) |
| 324 | pgdat_list[node] = mem_data[node].pgdat; |
| 325 | |
| 326 | /* Copy the pg_data_t list to each node and init the node field */ |
| 327 | for_each_online_node(node) { |
| 328 | memcpy(mem_data[node].node_data->pg_data_ptrs, pgdat_list, |
| 329 | sizeof(pgdat_list)); |
| 330 | } |
Tony Luck | 8d7e351 | 2005-07-06 18:18:10 -0700 | [diff] [blame] | 331 | #ifdef CONFIG_SMP |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 332 | /* Set the node_data pointer for each per-cpu struct */ |
| 333 | for (cpu = 0; cpu < NR_CPUS; cpu++) { |
| 334 | node = node_cpuid[cpu].nid; |
| 335 | per_cpu(cpu_info, cpu).node_data = mem_data[node].node_data; |
| 336 | } |
Tony Luck | 8d7e351 | 2005-07-06 18:18:10 -0700 | [diff] [blame] | 337 | #else |
| 338 | { |
| 339 | struct cpuinfo_ia64 *cpu0_cpu_info; |
| 340 | cpu = 0; |
| 341 | node = node_cpuid[cpu].nid; |
| 342 | cpu0_cpu_info = (struct cpuinfo_ia64 *)(__phys_per_cpu_start + |
| 343 | ((char *)&per_cpu__cpu_info - __per_cpu_start)); |
| 344 | cpu0_cpu_info->node_data = mem_data[node].node_data; |
| 345 | } |
| 346 | #endif /* CONFIG_SMP */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 347 | } |
| 348 | |
| 349 | /** |
bob.picco | 564601a | 2005-06-30 09:52:00 -0700 | [diff] [blame] | 350 | * memory_less_node_alloc - * attempt to allocate memory on the best NUMA slit |
| 351 | * node but fall back to any other node when __alloc_bootmem_node fails |
| 352 | * for best. |
| 353 | * @nid: node id |
| 354 | * @pernodesize: size of this node's pernode data |
bob.picco | 564601a | 2005-06-30 09:52:00 -0700 | [diff] [blame] | 355 | */ |
Bob Picco | 9783524 | 2005-10-29 17:23:05 -0400 | [diff] [blame] | 356 | static void __init *memory_less_node_alloc(int nid, unsigned long pernodesize) |
bob.picco | 564601a | 2005-06-30 09:52:00 -0700 | [diff] [blame] | 357 | { |
| 358 | void *ptr = NULL; |
| 359 | u8 best = 0xff; |
Bob Picco | 9783524 | 2005-10-29 17:23:05 -0400 | [diff] [blame] | 360 | int bestnode = -1, node, anynode = 0; |
bob.picco | 564601a | 2005-06-30 09:52:00 -0700 | [diff] [blame] | 361 | |
| 362 | for_each_online_node(node) { |
| 363 | if (node_isset(node, memory_less_mask)) |
| 364 | continue; |
| 365 | else if (node_distance(nid, node) < best) { |
| 366 | best = node_distance(nid, node); |
| 367 | bestnode = node; |
| 368 | } |
Bob Picco | 9783524 | 2005-10-29 17:23:05 -0400 | [diff] [blame] | 369 | anynode = node; |
bob.picco | 564601a | 2005-06-30 09:52:00 -0700 | [diff] [blame] | 370 | } |
| 371 | |
Bob Picco | 9783524 | 2005-10-29 17:23:05 -0400 | [diff] [blame] | 372 | if (bestnode == -1) |
| 373 | bestnode = anynode; |
bob.picco | 564601a | 2005-06-30 09:52:00 -0700 | [diff] [blame] | 374 | |
Bob Picco | 9783524 | 2005-10-29 17:23:05 -0400 | [diff] [blame] | 375 | ptr = __alloc_bootmem_node(mem_data[bestnode].pgdat, pernodesize, |
| 376 | PERCPU_PAGE_SIZE, __pa(MAX_DMA_ADDRESS)); |
| 377 | |
bob.picco | 564601a | 2005-06-30 09:52:00 -0700 | [diff] [blame] | 378 | return ptr; |
| 379 | } |
| 380 | |
| 381 | /** |
bob.picco | 564601a | 2005-06-30 09:52:00 -0700 | [diff] [blame] | 382 | * memory_less_nodes - allocate and initialize CPU only nodes pernode |
| 383 | * information. |
| 384 | */ |
| 385 | static void __init memory_less_nodes(void) |
| 386 | { |
| 387 | unsigned long pernodesize; |
| 388 | void *pernode; |
| 389 | int node; |
| 390 | |
| 391 | for_each_node_mask(node, memory_less_mask) { |
| 392 | pernodesize = compute_pernodesize(node); |
Bob Picco | 9783524 | 2005-10-29 17:23:05 -0400 | [diff] [blame] | 393 | pernode = memory_less_node_alloc(node, pernodesize); |
bob.picco | 564601a | 2005-06-30 09:52:00 -0700 | [diff] [blame] | 394 | fill_pernode(node, __pa(pernode), pernodesize); |
| 395 | } |
| 396 | |
| 397 | return; |
| 398 | } |
| 399 | |
Bob Picco | 2d4b1fa | 2005-10-04 15:13:57 -0400 | [diff] [blame] | 400 | #ifdef CONFIG_SPARSEMEM |
| 401 | /** |
| 402 | * register_sparse_mem - notify SPARSEMEM that this memory range exists. |
| 403 | * @start: physical start of range |
| 404 | * @end: physical end of range |
| 405 | * @arg: unused |
| 406 | * |
| 407 | * Simply calls SPARSEMEM to register memory section(s). |
| 408 | */ |
| 409 | static int __init register_sparse_mem(unsigned long start, unsigned long end, |
| 410 | void *arg) |
| 411 | { |
| 412 | int nid; |
| 413 | |
| 414 | start = __pa(start) >> PAGE_SHIFT; |
| 415 | end = __pa(end) >> PAGE_SHIFT; |
| 416 | nid = early_pfn_to_nid(start); |
| 417 | memory_present(nid, start, end); |
| 418 | |
| 419 | return 0; |
| 420 | } |
| 421 | |
| 422 | static void __init arch_sparse_init(void) |
| 423 | { |
| 424 | efi_memmap_walk(register_sparse_mem, NULL); |
| 425 | sparse_init(); |
| 426 | } |
| 427 | #else |
| 428 | #define arch_sparse_init() do {} while (0) |
| 429 | #endif |
| 430 | |
bob.picco | 564601a | 2005-06-30 09:52:00 -0700 | [diff] [blame] | 431 | /** |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 432 | * find_memory - walk the EFI memory map and setup the bootmem allocator |
| 433 | * |
| 434 | * Called early in boot to setup the bootmem allocator, and to |
| 435 | * allocate the per-cpu and per-node structures. |
| 436 | */ |
| 437 | void __init find_memory(void) |
| 438 | { |
| 439 | int node; |
| 440 | |
| 441 | reserve_memory(); |
| 442 | |
| 443 | if (num_online_nodes() == 0) { |
| 444 | printk(KERN_ERR "node info missing!\n"); |
| 445 | node_set_online(0); |
| 446 | } |
| 447 | |
bob.picco | 564601a | 2005-06-30 09:52:00 -0700 | [diff] [blame] | 448 | nodes_or(memory_less_mask, memory_less_mask, node_online_map); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 449 | min_low_pfn = -1; |
| 450 | max_low_pfn = 0; |
| 451 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 452 | /* These actually end up getting called by call_pernode_memory() */ |
| 453 | efi_memmap_walk(filter_rsvd_memory, build_node_maps); |
| 454 | efi_memmap_walk(filter_rsvd_memory, find_pernode_space); |
| 455 | |
bob.picco | 564601a | 2005-06-30 09:52:00 -0700 | [diff] [blame] | 456 | for_each_online_node(node) |
| 457 | if (mem_data[node].bootmem_data.node_low_pfn) { |
| 458 | node_clear(node, memory_less_mask); |
| 459 | mem_data[node].min_pfn = ~0UL; |
| 460 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 461 | /* |
| 462 | * Initialize the boot memory maps in reverse order since that's |
| 463 | * what the bootmem allocator expects |
| 464 | */ |
| 465 | for (node = MAX_NUMNODES - 1; node >= 0; node--) { |
| 466 | unsigned long pernode, pernodesize, map; |
| 467 | struct bootmem_data *bdp; |
| 468 | |
| 469 | if (!node_online(node)) |
| 470 | continue; |
bob.picco | 564601a | 2005-06-30 09:52:00 -0700 | [diff] [blame] | 471 | else if (node_isset(node, memory_less_mask)) |
| 472 | continue; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 473 | |
| 474 | bdp = &mem_data[node].bootmem_data; |
| 475 | pernode = mem_data[node].pernode_addr; |
| 476 | pernodesize = mem_data[node].pernode_size; |
| 477 | map = pernode + pernodesize; |
| 478 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 479 | init_bootmem_node(mem_data[node].pgdat, |
| 480 | map>>PAGE_SHIFT, |
| 481 | bdp->node_boot_start>>PAGE_SHIFT, |
| 482 | bdp->node_low_pfn); |
| 483 | } |
| 484 | |
| 485 | efi_memmap_walk(filter_rsvd_memory, free_node_bootmem); |
| 486 | |
| 487 | reserve_pernode_space(); |
bob.picco | 564601a | 2005-06-30 09:52:00 -0700 | [diff] [blame] | 488 | memory_less_nodes(); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 489 | initialize_pernode_data(); |
| 490 | |
| 491 | max_pfn = max_low_pfn; |
| 492 | |
| 493 | find_initrd(); |
| 494 | } |
| 495 | |
Tony Luck | 8d7e351 | 2005-07-06 18:18:10 -0700 | [diff] [blame] | 496 | #ifdef CONFIG_SMP |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 497 | /** |
| 498 | * per_cpu_init - setup per-cpu variables |
| 499 | * |
| 500 | * find_pernode_space() does most of this already, we just need to set |
| 501 | * local_per_cpu_offset |
| 502 | */ |
Chen, Kenneth W | 244fd54 | 2006-03-12 09:00:13 -0800 | [diff] [blame] | 503 | void __cpuinit *per_cpu_init(void) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 504 | { |
| 505 | int cpu; |
Ashok Raj | ff74190 | 2005-11-11 14:32:40 -0800 | [diff] [blame] | 506 | static int first_time = 1; |
| 507 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 508 | |
Tony Luck | 8d7e351 | 2005-07-06 18:18:10 -0700 | [diff] [blame] | 509 | if (smp_processor_id() != 0) |
| 510 | return __per_cpu_start + __per_cpu_offset[smp_processor_id()]; |
| 511 | |
Ashok Raj | ff74190 | 2005-11-11 14:32:40 -0800 | [diff] [blame] | 512 | if (first_time) { |
| 513 | first_time = 0; |
| 514 | for (cpu = 0; cpu < NR_CPUS; cpu++) |
| 515 | per_cpu(local_per_cpu_offset, cpu) = __per_cpu_offset[cpu]; |
| 516 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 517 | |
| 518 | return __per_cpu_start + __per_cpu_offset[smp_processor_id()]; |
| 519 | } |
Tony Luck | 8d7e351 | 2005-07-06 18:18:10 -0700 | [diff] [blame] | 520 | #endif /* CONFIG_SMP */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 521 | |
Robin Holt | ace1d81 | 2006-04-13 15:34:45 -0700 | [diff] [blame] | 522 | #ifdef CONFIG_VIRTUAL_MEM_MAP |
| 523 | static inline int find_next_valid_pfn_for_pgdat(pg_data_t *pgdat, int i) |
| 524 | { |
| 525 | unsigned long end_address, hole_next_pfn; |
| 526 | unsigned long stop_address; |
| 527 | |
| 528 | end_address = (unsigned long) &vmem_map[pgdat->node_start_pfn + i]; |
| 529 | end_address = PAGE_ALIGN(end_address); |
| 530 | |
| 531 | stop_address = (unsigned long) &vmem_map[ |
| 532 | pgdat->node_start_pfn + pgdat->node_spanned_pages]; |
| 533 | |
| 534 | do { |
| 535 | pgd_t *pgd; |
| 536 | pud_t *pud; |
| 537 | pmd_t *pmd; |
| 538 | pte_t *pte; |
| 539 | |
| 540 | pgd = pgd_offset_k(end_address); |
| 541 | if (pgd_none(*pgd)) { |
| 542 | end_address += PGDIR_SIZE; |
| 543 | continue; |
| 544 | } |
| 545 | |
| 546 | pud = pud_offset(pgd, end_address); |
| 547 | if (pud_none(*pud)) { |
| 548 | end_address += PUD_SIZE; |
| 549 | continue; |
| 550 | } |
| 551 | |
| 552 | pmd = pmd_offset(pud, end_address); |
| 553 | if (pmd_none(*pmd)) { |
| 554 | end_address += PMD_SIZE; |
| 555 | continue; |
| 556 | } |
| 557 | |
| 558 | pte = pte_offset_kernel(pmd, end_address); |
| 559 | retry_pte: |
| 560 | if (pte_none(*pte)) { |
| 561 | end_address += PAGE_SIZE; |
| 562 | pte++; |
| 563 | if ((end_address < stop_address) && |
| 564 | (end_address != ALIGN(end_address, 1UL << PMD_SHIFT))) |
| 565 | goto retry_pte; |
| 566 | continue; |
| 567 | } |
| 568 | /* Found next valid vmem_map page */ |
| 569 | break; |
| 570 | } while (end_address < stop_address); |
| 571 | |
| 572 | end_address = min(end_address, stop_address); |
| 573 | end_address = end_address - (unsigned long) vmem_map + sizeof(struct page) - 1; |
| 574 | hole_next_pfn = end_address / sizeof(struct page); |
| 575 | return hole_next_pfn - pgdat->node_start_pfn; |
| 576 | } |
| 577 | #else |
| 578 | static inline int find_next_valid_pfn_for_pgdat(pg_data_t *pgdat, int i) |
| 579 | { |
| 580 | return i + 1; |
| 581 | } |
| 582 | #endif |
| 583 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 584 | /** |
| 585 | * show_mem - give short summary of memory stats |
| 586 | * |
| 587 | * Shows a simple page count of reserved and used pages in the system. |
| 588 | * For discontig machines, it does this on a per-pgdat basis. |
| 589 | */ |
| 590 | void show_mem(void) |
| 591 | { |
| 592 | int i, total_reserved = 0; |
| 593 | int total_shared = 0, total_cached = 0; |
| 594 | unsigned long total_present = 0; |
| 595 | pg_data_t *pgdat; |
| 596 | |
| 597 | printk("Mem-info:\n"); |
| 598 | show_free_areas(); |
| 599 | printk("Free swap: %6ldkB\n", nr_swap_pages<<(PAGE_SHIFT-10)); |
KAMEZAWA Hiroyuki | ec936fc | 2006-03-27 01:15:59 -0800 | [diff] [blame] | 600 | for_each_online_pgdat(pgdat) { |
Dave Hansen | 208d54e | 2005-10-29 18:16:52 -0700 | [diff] [blame] | 601 | unsigned long present; |
| 602 | unsigned long flags; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 603 | int shared = 0, cached = 0, reserved = 0; |
Dave Hansen | 208d54e | 2005-10-29 18:16:52 -0700 | [diff] [blame] | 604 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 605 | printk("Node ID: %d\n", pgdat->node_id); |
Dave Hansen | 208d54e | 2005-10-29 18:16:52 -0700 | [diff] [blame] | 606 | pgdat_resize_lock(pgdat, &flags); |
| 607 | present = pgdat->node_present_pages; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 608 | for(i = 0; i < pgdat->node_spanned_pages; i++) { |
Bob Picco | 2d4b1fa | 2005-10-04 15:13:57 -0400 | [diff] [blame] | 609 | struct page *page; |
| 610 | if (pfn_valid(pgdat->node_start_pfn + i)) |
| 611 | page = pfn_to_page(pgdat->node_start_pfn + i); |
Robin Holt | ace1d81 | 2006-04-13 15:34:45 -0700 | [diff] [blame] | 612 | else { |
| 613 | i = find_next_valid_pfn_for_pgdat(pgdat, i) - 1; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 614 | continue; |
Robin Holt | ace1d81 | 2006-04-13 15:34:45 -0700 | [diff] [blame] | 615 | } |
Dave Hansen | 408fde8 | 2005-06-23 00:07:37 -0700 | [diff] [blame] | 616 | if (PageReserved(page)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 617 | reserved++; |
Dave Hansen | 408fde8 | 2005-06-23 00:07:37 -0700 | [diff] [blame] | 618 | else if (PageSwapCache(page)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 619 | cached++; |
Dave Hansen | 408fde8 | 2005-06-23 00:07:37 -0700 | [diff] [blame] | 620 | else if (page_count(page)) |
| 621 | shared += page_count(page)-1; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 622 | } |
Dave Hansen | 208d54e | 2005-10-29 18:16:52 -0700 | [diff] [blame] | 623 | pgdat_resize_unlock(pgdat, &flags); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 624 | total_present += present; |
| 625 | total_reserved += reserved; |
| 626 | total_cached += cached; |
| 627 | total_shared += shared; |
| 628 | printk("\t%ld pages of RAM\n", present); |
| 629 | printk("\t%d reserved pages\n", reserved); |
| 630 | printk("\t%d pages shared\n", shared); |
| 631 | printk("\t%d pages swap cached\n", cached); |
| 632 | } |
| 633 | printk("%ld pages of RAM\n", total_present); |
| 634 | printk("%d reserved pages\n", total_reserved); |
| 635 | printk("%d pages shared\n", total_shared); |
| 636 | printk("%d pages swap cached\n", total_cached); |
Robin Holt | fde740e | 2005-04-25 13:13:16 -0700 | [diff] [blame] | 637 | printk("Total of %ld pages in page table cache\n", |
| 638 | pgtable_quicklist_total_size()); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 639 | printk("%d free buffer pages\n", nr_free_buffer_pages()); |
| 640 | } |
| 641 | |
| 642 | /** |
| 643 | * call_pernode_memory - use SRAT to call callback functions with node info |
| 644 | * @start: physical start of range |
| 645 | * @len: length of range |
| 646 | * @arg: function to call for each range |
| 647 | * |
| 648 | * efi_memmap_walk() knows nothing about layout of memory across nodes. Find |
| 649 | * out to which node a block of memory belongs. Ignore memory that we cannot |
| 650 | * identify, and split blocks that run across multiple nodes. |
| 651 | * |
| 652 | * Take this opportunity to round the start address up and the end address |
| 653 | * down to page boundaries. |
| 654 | */ |
| 655 | void call_pernode_memory(unsigned long start, unsigned long len, void *arg) |
| 656 | { |
| 657 | unsigned long rs, re, end = start + len; |
| 658 | void (*func)(unsigned long, unsigned long, int); |
| 659 | int i; |
| 660 | |
| 661 | start = PAGE_ALIGN(start); |
| 662 | end &= PAGE_MASK; |
| 663 | if (start >= end) |
| 664 | return; |
| 665 | |
| 666 | func = arg; |
| 667 | |
| 668 | if (!num_node_memblks) { |
| 669 | /* No SRAT table, so assume one node (node 0) */ |
| 670 | if (start < end) |
| 671 | (*func)(start, end - start, 0); |
| 672 | return; |
| 673 | } |
| 674 | |
| 675 | for (i = 0; i < num_node_memblks; i++) { |
| 676 | rs = max(start, node_memblk[i].start_paddr); |
| 677 | re = min(end, node_memblk[i].start_paddr + |
| 678 | node_memblk[i].size); |
| 679 | |
| 680 | if (rs < re) |
| 681 | (*func)(rs, re - rs, node_memblk[i].nid); |
| 682 | |
| 683 | if (re == end) |
| 684 | break; |
| 685 | } |
| 686 | } |
| 687 | |
| 688 | /** |
| 689 | * count_node_pages - callback to build per-node memory info structures |
| 690 | * @start: physical start of range |
| 691 | * @len: length of range |
| 692 | * @node: node where this range resides |
| 693 | * |
| 694 | * Each node has it's own number of physical pages, DMAable pages, start, and |
| 695 | * end page frame number. This routine will be called by call_pernode_memory() |
| 696 | * for each piece of usable memory and will setup these values for each node. |
| 697 | * Very similar to build_maps(). |
| 698 | */ |
| 699 | static __init int count_node_pages(unsigned long start, unsigned long len, int node) |
| 700 | { |
| 701 | unsigned long end = start + len; |
| 702 | |
| 703 | mem_data[node].num_physpages += len >> PAGE_SHIFT; |
| 704 | if (start <= __pa(MAX_DMA_ADDRESS)) |
| 705 | mem_data[node].num_dma_physpages += |
| 706 | (min(end, __pa(MAX_DMA_ADDRESS)) - start) >>PAGE_SHIFT; |
| 707 | start = GRANULEROUNDDOWN(start); |
| 708 | start = ORDERROUNDDOWN(start); |
| 709 | end = GRANULEROUNDUP(end); |
| 710 | mem_data[node].max_pfn = max(mem_data[node].max_pfn, |
| 711 | end >> PAGE_SHIFT); |
| 712 | mem_data[node].min_pfn = min(mem_data[node].min_pfn, |
| 713 | start >> PAGE_SHIFT); |
| 714 | |
| 715 | return 0; |
| 716 | } |
| 717 | |
| 718 | /** |
| 719 | * paging_init - setup page tables |
| 720 | * |
| 721 | * paging_init() sets up the page tables for each node of the system and frees |
| 722 | * the bootmem allocator memory for general use. |
| 723 | */ |
| 724 | void __init paging_init(void) |
| 725 | { |
| 726 | unsigned long max_dma; |
| 727 | unsigned long zones_size[MAX_NR_ZONES]; |
| 728 | unsigned long zholes_size[MAX_NR_ZONES]; |
| 729 | unsigned long pfn_offset = 0; |
| 730 | int node; |
| 731 | |
| 732 | max_dma = virt_to_phys((void *) MAX_DMA_ADDRESS) >> PAGE_SHIFT; |
| 733 | |
Bob Picco | 2d4b1fa | 2005-10-04 15:13:57 -0400 | [diff] [blame] | 734 | arch_sparse_init(); |
| 735 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 736 | efi_memmap_walk(filter_rsvd_memory, count_node_pages); |
| 737 | |
Bob Picco | 2d4b1fa | 2005-10-04 15:13:57 -0400 | [diff] [blame] | 738 | #ifdef CONFIG_VIRTUAL_MEM_MAP |
bob.picco | 564601a | 2005-06-30 09:52:00 -0700 | [diff] [blame] | 739 | vmalloc_end -= PAGE_ALIGN(max_low_pfn * sizeof(struct page)); |
| 740 | vmem_map = (struct page *) vmalloc_end; |
| 741 | efi_memmap_walk(create_mem_map_page_table, NULL); |
| 742 | printk("Virtual mem_map starts at 0x%p\n", vmem_map); |
Bob Picco | 2d4b1fa | 2005-10-04 15:13:57 -0400 | [diff] [blame] | 743 | #endif |
bob.picco | 564601a | 2005-06-30 09:52:00 -0700 | [diff] [blame] | 744 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 745 | for_each_online_node(node) { |
| 746 | memset(zones_size, 0, sizeof(zones_size)); |
| 747 | memset(zholes_size, 0, sizeof(zholes_size)); |
| 748 | |
| 749 | num_physpages += mem_data[node].num_physpages; |
| 750 | |
| 751 | if (mem_data[node].min_pfn >= max_dma) { |
| 752 | /* All of this node's memory is above ZONE_DMA */ |
| 753 | zones_size[ZONE_NORMAL] = mem_data[node].max_pfn - |
| 754 | mem_data[node].min_pfn; |
| 755 | zholes_size[ZONE_NORMAL] = mem_data[node].max_pfn - |
| 756 | mem_data[node].min_pfn - |
| 757 | mem_data[node].num_physpages; |
| 758 | } else if (mem_data[node].max_pfn < max_dma) { |
| 759 | /* All of this node's memory is in ZONE_DMA */ |
| 760 | zones_size[ZONE_DMA] = mem_data[node].max_pfn - |
| 761 | mem_data[node].min_pfn; |
| 762 | zholes_size[ZONE_DMA] = mem_data[node].max_pfn - |
| 763 | mem_data[node].min_pfn - |
| 764 | mem_data[node].num_dma_physpages; |
| 765 | } else { |
| 766 | /* This node has memory in both zones */ |
| 767 | zones_size[ZONE_DMA] = max_dma - |
| 768 | mem_data[node].min_pfn; |
| 769 | zholes_size[ZONE_DMA] = zones_size[ZONE_DMA] - |
| 770 | mem_data[node].num_dma_physpages; |
| 771 | zones_size[ZONE_NORMAL] = mem_data[node].max_pfn - |
| 772 | max_dma; |
| 773 | zholes_size[ZONE_NORMAL] = zones_size[ZONE_NORMAL] - |
| 774 | (mem_data[node].num_physpages - |
| 775 | mem_data[node].num_dma_physpages); |
| 776 | } |
| 777 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 778 | pfn_offset = mem_data[node].min_pfn; |
| 779 | |
Bob Picco | 2d4b1fa | 2005-10-04 15:13:57 -0400 | [diff] [blame] | 780 | #ifdef CONFIG_VIRTUAL_MEM_MAP |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 781 | NODE_DATA(node)->node_mem_map = vmem_map + pfn_offset; |
Bob Picco | 2d4b1fa | 2005-10-04 15:13:57 -0400 | [diff] [blame] | 782 | #endif |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 783 | free_area_init_node(node, NODE_DATA(node), zones_size, |
| 784 | pfn_offset, zholes_size); |
| 785 | } |
| 786 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 787 | zero_page_memmap_ptr = virt_to_page(ia64_imva(empty_zero_page)); |
| 788 | } |