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1da177e4 LT |
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> | |
99a19cf1 | 19 | #include <linux/nmi.h> |
1da177e4 LT |
20 | #include <linux/swap.h> |
21 | #include <linux/bootmem.h> | |
22 | #include <linux/acpi.h> | |
23 | #include <linux/efi.h> | |
24 | #include <linux/nodemask.h> | |
5a0e3ad6 | 25 | #include <linux/slab.h> |
1da177e4 LT |
26 | #include <asm/pgalloc.h> |
27 | #include <asm/tlb.h> | |
28 | #include <asm/meminit.h> | |
29 | #include <asm/numa.h> | |
30 | #include <asm/sections.h> | |
31 | ||
32 | /* | |
33 | * Track per-node information needed to setup the boot memory allocator, the | |
34 | * per-node areas, and the real VM. | |
35 | */ | |
36 | struct early_node_data { | |
37 | struct ia64_node_data *node_data; | |
1da177e4 LT |
38 | unsigned long pernode_addr; |
39 | unsigned long pernode_size; | |
09ae1f58 | 40 | #ifdef CONFIG_ZONE_DMA |
1da177e4 | 41 | unsigned long num_dma_physpages; |
09ae1f58 | 42 | #endif |
1da177e4 LT |
43 | unsigned long min_pfn; |
44 | unsigned long max_pfn; | |
45 | }; | |
46 | ||
47 | static struct early_node_data mem_data[MAX_NUMNODES] __initdata; | |
564601a5 | 48 | static nodemask_t memory_less_mask __initdata; |
1da177e4 | 49 | |
fd59d231 | 50 | pg_data_t *pgdat_list[MAX_NUMNODES]; |
ae5a2c1c | 51 | |
1da177e4 LT |
52 | /* |
53 | * To prevent cache aliasing effects, align per-node structures so that they | |
54 | * start at addresses that are strided by node number. | |
55 | */ | |
acb7f672 | 56 | #define MAX_NODE_ALIGN_OFFSET (32 * 1024 * 1024) |
1da177e4 | 57 | #define NODEDATA_ALIGN(addr, node) \ |
acb7f672 JS |
58 | ((((addr) + 1024*1024-1) & ~(1024*1024-1)) + \ |
59 | (((node)*PERCPU_PAGE_SIZE) & (MAX_NODE_ALIGN_OFFSET - 1))) | |
1da177e4 LT |
60 | |
61 | /** | |
62 | * build_node_maps - callback to setup bootmem structs for each node | |
63 | * @start: physical start of range | |
64 | * @len: length of range | |
65 | * @node: node where this range resides | |
66 | * | |
67 | * We allocate a struct bootmem_data for each piece of memory that we wish to | |
68 | * treat as a virtually contiguous block (i.e. each node). Each such block | |
69 | * must start on an %IA64_GRANULE_SIZE boundary, so we round the address down | |
70 | * if necessary. Any non-existent pages will simply be part of the virtual | |
71 | * memmap. We also update min_low_pfn and max_low_pfn here as we receive | |
72 | * memory ranges from the caller. | |
73 | */ | |
74 | static int __init build_node_maps(unsigned long start, unsigned long len, | |
75 | int node) | |
76 | { | |
3560e249 | 77 | unsigned long spfn, epfn, end = start + len; |
b61bfa3c | 78 | struct bootmem_data *bdp = &bootmem_node_data[node]; |
1da177e4 LT |
79 | |
80 | epfn = GRANULEROUNDUP(end) >> PAGE_SHIFT; | |
3560e249 | 81 | spfn = GRANULEROUNDDOWN(start) >> PAGE_SHIFT; |
1da177e4 LT |
82 | |
83 | if (!bdp->node_low_pfn) { | |
3560e249 | 84 | bdp->node_min_pfn = spfn; |
1da177e4 LT |
85 | bdp->node_low_pfn = epfn; |
86 | } else { | |
3560e249 | 87 | bdp->node_min_pfn = min(spfn, bdp->node_min_pfn); |
1da177e4 LT |
88 | bdp->node_low_pfn = max(epfn, bdp->node_low_pfn); |
89 | } | |
90 | ||
1da177e4 LT |
91 | return 0; |
92 | } | |
93 | ||
94 | /** | |
564601a5 | 95 | * early_nr_cpus_node - return number of cpus on a given node |
1da177e4 LT |
96 | * @node: node to check |
97 | * | |
564601a5 | 98 | * Count the number of cpus on @node. We can't use nr_cpus_node() yet because |
1da177e4 | 99 | * acpi_boot_init() (which builds the node_to_cpu_mask array) hasn't been |
564601a5 | 100 | * called yet. Note that node 0 will also count all non-existent cpus. |
1da177e4 | 101 | */ |
dd0932d9 | 102 | static int __meminit early_nr_cpus_node(int node) |
1da177e4 LT |
103 | { |
104 | int cpu, n = 0; | |
105 | ||
2c6e6db4 | 106 | for_each_possible_early_cpu(cpu) |
1da177e4 | 107 | if (node == node_cpuid[cpu].nid) |
564601a5 | 108 | n++; |
1da177e4 LT |
109 | |
110 | return n; | |
111 | } | |
112 | ||
564601a5 | 113 | /** |
114 | * compute_pernodesize - compute size of pernode data | |
115 | * @node: the node id. | |
116 | */ | |
dd0932d9 | 117 | static unsigned long __meminit compute_pernodesize(int node) |
564601a5 | 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)); | |
41bd26d6 | 126 | pernodesize += L1_CACHE_ALIGN(sizeof(pg_data_t)); |
564601a5 | 127 | pernodesize = PAGE_ALIGN(pernodesize); |
128 | return pernodesize; | |
129 | } | |
1da177e4 | 130 | |
8d7e3517 TL |
131 | /** |
132 | * per_cpu_node_setup - setup per-cpu areas on each node | |
133 | * @cpu_data: per-cpu area on this node | |
134 | * @node: node to setup | |
135 | * | |
136 | * Copy the static per-cpu data into the region we just set aside and then | |
137 | * setup __per_cpu_offset for each CPU on this node. Return a pointer to | |
138 | * the end of the area. | |
139 | */ | |
140 | static void *per_cpu_node_setup(void *cpu_data, int node) | |
141 | { | |
142 | #ifdef CONFIG_SMP | |
143 | int cpu; | |
144 | ||
2c6e6db4 | 145 | for_each_possible_early_cpu(cpu) { |
36886478 TH |
146 | void *src = cpu == 0 ? __cpu0_per_cpu : __phys_per_cpu_start; |
147 | ||
148 | if (node != node_cpuid[cpu].nid) | |
149 | continue; | |
150 | ||
151 | memcpy(__va(cpu_data), src, __per_cpu_end - __per_cpu_start); | |
152 | __per_cpu_offset[cpu] = (char *)__va(cpu_data) - | |
153 | __per_cpu_start; | |
154 | ||
155 | /* | |
156 | * percpu area for cpu0 is moved from the __init area | |
157 | * which is setup by head.S and used till this point. | |
158 | * Update ar.k3. This move is ensures that percpu | |
159 | * area for cpu0 is on the correct node and its | |
160 | * virtual address isn't insanely far from other | |
161 | * percpu areas which is important for congruent | |
162 | * percpu allocator. | |
163 | */ | |
164 | if (cpu == 0) | |
165 | ia64_set_kr(IA64_KR_PER_CPU_DATA, | |
166 | (unsigned long)cpu_data - | |
167 | (unsigned long)__per_cpu_start); | |
168 | ||
169 | cpu_data += PERCPU_PAGE_SIZE; | |
8d7e3517 TL |
170 | } |
171 | #endif | |
172 | return cpu_data; | |
173 | } | |
174 | ||
52594762 TH |
175 | #ifdef CONFIG_SMP |
176 | /** | |
177 | * setup_per_cpu_areas - setup percpu areas | |
178 | * | |
179 | * Arch code has already allocated and initialized percpu areas. All | |
180 | * this function has to do is to teach the determined layout to the | |
181 | * dynamic percpu allocator, which happens to be more complex than | |
182 | * creating whole new ones using helpers. | |
183 | */ | |
184 | void __init setup_per_cpu_areas(void) | |
185 | { | |
186 | struct pcpu_alloc_info *ai; | |
187 | struct pcpu_group_info *uninitialized_var(gi); | |
188 | unsigned int *cpu_map; | |
189 | void *base; | |
190 | unsigned long base_offset; | |
191 | unsigned int cpu; | |
192 | ssize_t static_size, reserved_size, dyn_size; | |
193 | int node, prev_node, unit, nr_units, rc; | |
194 | ||
195 | ai = pcpu_alloc_alloc_info(MAX_NUMNODES, nr_cpu_ids); | |
196 | if (!ai) | |
197 | panic("failed to allocate pcpu_alloc_info"); | |
198 | cpu_map = ai->groups[0].cpu_map; | |
199 | ||
200 | /* determine base */ | |
201 | base = (void *)ULONG_MAX; | |
202 | for_each_possible_cpu(cpu) | |
203 | base = min(base, | |
204 | (void *)(__per_cpu_offset[cpu] + __per_cpu_start)); | |
205 | base_offset = (void *)__per_cpu_start - base; | |
206 | ||
207 | /* build cpu_map, units are grouped by node */ | |
208 | unit = 0; | |
209 | for_each_node(node) | |
210 | for_each_possible_cpu(cpu) | |
211 | if (node == node_cpuid[cpu].nid) | |
212 | cpu_map[unit++] = cpu; | |
213 | nr_units = unit; | |
214 | ||
215 | /* set basic parameters */ | |
216 | static_size = __per_cpu_end - __per_cpu_start; | |
217 | reserved_size = PERCPU_MODULE_RESERVE; | |
218 | dyn_size = PERCPU_PAGE_SIZE - static_size - reserved_size; | |
219 | if (dyn_size < 0) | |
220 | panic("percpu area overflow static=%zd reserved=%zd\n", | |
221 | static_size, reserved_size); | |
222 | ||
223 | ai->static_size = static_size; | |
224 | ai->reserved_size = reserved_size; | |
225 | ai->dyn_size = dyn_size; | |
226 | ai->unit_size = PERCPU_PAGE_SIZE; | |
227 | ai->atom_size = PAGE_SIZE; | |
228 | ai->alloc_size = PERCPU_PAGE_SIZE; | |
229 | ||
230 | /* | |
231 | * CPUs are put into groups according to node. Walk cpu_map | |
232 | * and create new groups at node boundaries. | |
233 | */ | |
234 | prev_node = -1; | |
235 | ai->nr_groups = 0; | |
236 | for (unit = 0; unit < nr_units; unit++) { | |
237 | cpu = cpu_map[unit]; | |
238 | node = node_cpuid[cpu].nid; | |
239 | ||
240 | if (node == prev_node) { | |
241 | gi->nr_units++; | |
242 | continue; | |
243 | } | |
244 | prev_node = node; | |
245 | ||
246 | gi = &ai->groups[ai->nr_groups++]; | |
247 | gi->nr_units = 1; | |
248 | gi->base_offset = __per_cpu_offset[cpu] + base_offset; | |
249 | gi->cpu_map = &cpu_map[unit]; | |
250 | } | |
251 | ||
252 | rc = pcpu_setup_first_chunk(ai, base); | |
253 | if (rc) | |
254 | panic("failed to setup percpu area (err=%d)", rc); | |
255 | ||
256 | pcpu_free_alloc_info(ai); | |
257 | } | |
258 | #endif | |
259 | ||
1da177e4 | 260 | /** |
564601a5 | 261 | * fill_pernode - initialize pernode data. |
262 | * @node: the node id. | |
263 | * @pernode: physical address of pernode data | |
264 | * @pernodesize: size of the pernode data | |
1da177e4 | 265 | */ |
564601a5 | 266 | static void __init fill_pernode(int node, unsigned long pernode, |
267 | unsigned long pernodesize) | |
1da177e4 | 268 | { |
564601a5 | 269 | void *cpu_data; |
8d7e3517 | 270 | int cpus = early_nr_cpus_node(node); |
b61bfa3c | 271 | struct bootmem_data *bdp = &bootmem_node_data[node]; |
1da177e4 | 272 | |
564601a5 | 273 | mem_data[node].pernode_addr = pernode; |
274 | mem_data[node].pernode_size = pernodesize; | |
275 | memset(__va(pernode), 0, pernodesize); | |
1da177e4 | 276 | |
564601a5 | 277 | cpu_data = (void *)pernode; |
278 | pernode += PERCPU_PAGE_SIZE * cpus; | |
279 | pernode += node * L1_CACHE_BYTES; | |
280 | ||
ae5a2c1c | 281 | pgdat_list[node] = __va(pernode); |
564601a5 | 282 | pernode += L1_CACHE_ALIGN(sizeof(pg_data_t)); |
283 | ||
284 | mem_data[node].node_data = __va(pernode); | |
285 | pernode += L1_CACHE_ALIGN(sizeof(struct ia64_node_data)); | |
286 | ||
ae5a2c1c | 287 | pgdat_list[node]->bdata = bdp; |
564601a5 | 288 | pernode += L1_CACHE_ALIGN(sizeof(pg_data_t)); |
289 | ||
8d7e3517 | 290 | cpu_data = per_cpu_node_setup(cpu_data, node); |
1da177e4 | 291 | |
564601a5 | 292 | return; |
293 | } | |
8d7e3517 | 294 | |
1da177e4 LT |
295 | /** |
296 | * find_pernode_space - allocate memory for memory map and per-node structures | |
297 | * @start: physical start of range | |
298 | * @len: length of range | |
299 | * @node: node where this range resides | |
300 | * | |
301 | * This routine reserves space for the per-cpu data struct, the list of | |
302 | * pg_data_ts and the per-node data struct. Each node will have something like | |
303 | * the following in the first chunk of addr. space large enough to hold it. | |
304 | * | |
305 | * ________________________ | |
306 | * | | | |
307 | * |~~~~~~~~~~~~~~~~~~~~~~~~| <-- NODEDATA_ALIGN(start, node) for the first | |
308 | * | PERCPU_PAGE_SIZE * | start and length big enough | |
309 | * | cpus_on_this_node | Node 0 will also have entries for all non-existent cpus. | |
310 | * |------------------------| | |
311 | * | local pg_data_t * | | |
312 | * |------------------------| | |
313 | * | local ia64_node_data | | |
314 | * |------------------------| | |
315 | * | ??? | | |
316 | * |________________________| | |
317 | * | |
318 | * Once this space has been set aside, the bootmem maps are initialized. We | |
319 | * could probably move the allocation of the per-cpu and ia64_node_data space | |
320 | * outside of this function and use alloc_bootmem_node(), but doing it here | |
321 | * is straightforward and we get the alignments we want so... | |
322 | */ | |
323 | static int __init find_pernode_space(unsigned long start, unsigned long len, | |
324 | int node) | |
325 | { | |
3560e249 | 326 | unsigned long spfn, epfn; |
1da177e4 | 327 | unsigned long pernodesize = 0, pernode, pages, mapsize; |
b61bfa3c | 328 | struct bootmem_data *bdp = &bootmem_node_data[node]; |
1da177e4 | 329 | |
3560e249 | 330 | spfn = start >> PAGE_SHIFT; |
1da177e4 LT |
331 | epfn = (start + len) >> PAGE_SHIFT; |
332 | ||
3560e249 | 333 | pages = bdp->node_low_pfn - bdp->node_min_pfn; |
1da177e4 LT |
334 | mapsize = bootmem_bootmap_pages(pages) << PAGE_SHIFT; |
335 | ||
336 | /* | |
337 | * Make sure this memory falls within this node's usable memory | |
338 | * since we may have thrown some away in build_maps(). | |
339 | */ | |
3560e249 | 340 | if (spfn < bdp->node_min_pfn || epfn > bdp->node_low_pfn) |
1da177e4 LT |
341 | return 0; |
342 | ||
343 | /* Don't setup this node's local space twice... */ | |
344 | if (mem_data[node].pernode_addr) | |
345 | return 0; | |
346 | ||
347 | /* | |
348 | * Calculate total size needed, incl. what's necessary | |
349 | * for good alignment and alias prevention. | |
350 | */ | |
564601a5 | 351 | pernodesize = compute_pernodesize(node); |
1da177e4 LT |
352 | pernode = NODEDATA_ALIGN(start, node); |
353 | ||
354 | /* Is this range big enough for what we want to store here? */ | |
564601a5 | 355 | if (start + len > (pernode + pernodesize + mapsize)) |
356 | fill_pernode(node, pernode, pernodesize); | |
1da177e4 LT |
357 | |
358 | return 0; | |
359 | } | |
360 | ||
361 | /** | |
362 | * free_node_bootmem - free bootmem allocator memory for use | |
363 | * @start: physical start of range | |
364 | * @len: length of range | |
365 | * @node: node where this range resides | |
366 | * | |
367 | * Simply calls the bootmem allocator to free the specified ranged from | |
368 | * the given pg_data_t's bdata struct. After this function has been called | |
369 | * for all the entries in the EFI memory map, the bootmem allocator will | |
370 | * be ready to service allocation requests. | |
371 | */ | |
372 | static int __init free_node_bootmem(unsigned long start, unsigned long len, | |
373 | int node) | |
374 | { | |
ae5a2c1c | 375 | free_bootmem_node(pgdat_list[node], start, len); |
1da177e4 LT |
376 | |
377 | return 0; | |
378 | } | |
379 | ||
380 | /** | |
381 | * reserve_pernode_space - reserve memory for per-node space | |
382 | * | |
383 | * Reserve the space used by the bootmem maps & per-node space in the boot | |
384 | * allocator so that when we actually create the real mem maps we don't | |
385 | * use their memory. | |
386 | */ | |
387 | static void __init reserve_pernode_space(void) | |
388 | { | |
389 | unsigned long base, size, pages; | |
390 | struct bootmem_data *bdp; | |
391 | int node; | |
392 | ||
393 | for_each_online_node(node) { | |
ae5a2c1c | 394 | pg_data_t *pdp = pgdat_list[node]; |
1da177e4 | 395 | |
564601a5 | 396 | if (node_isset(node, memory_less_mask)) |
397 | continue; | |
398 | ||
1da177e4 LT |
399 | bdp = pdp->bdata; |
400 | ||
401 | /* First the bootmem_map itself */ | |
3560e249 | 402 | pages = bdp->node_low_pfn - bdp->node_min_pfn; |
1da177e4 LT |
403 | size = bootmem_bootmap_pages(pages) << PAGE_SHIFT; |
404 | base = __pa(bdp->node_bootmem_map); | |
72a7fe39 | 405 | reserve_bootmem_node(pdp, base, size, BOOTMEM_DEFAULT); |
1da177e4 LT |
406 | |
407 | /* Now the per-node space */ | |
408 | size = mem_data[node].pernode_size; | |
409 | base = __pa(mem_data[node].pernode_addr); | |
72a7fe39 | 410 | reserve_bootmem_node(pdp, base, size, BOOTMEM_DEFAULT); |
1da177e4 LT |
411 | } |
412 | } | |
413 | ||
7049027c YG |
414 | static void __meminit scatter_node_data(void) |
415 | { | |
416 | pg_data_t **dst; | |
417 | int node; | |
418 | ||
dd8041f1 YG |
419 | /* |
420 | * for_each_online_node() can't be used at here. | |
421 | * node_online_map is not set for hot-added nodes at this time, | |
422 | * because we are halfway through initialization of the new node's | |
423 | * structures. If for_each_online_node() is used, a new node's | |
72fdbdce | 424 | * pg_data_ptrs will be not initialized. Instead of using it, |
dd8041f1 YG |
425 | * pgdat_list[] is checked. |
426 | */ | |
427 | for_each_node(node) { | |
428 | if (pgdat_list[node]) { | |
429 | dst = LOCAL_DATA_ADDR(pgdat_list[node])->pg_data_ptrs; | |
430 | memcpy(dst, pgdat_list, sizeof(pgdat_list)); | |
431 | } | |
7049027c YG |
432 | } |
433 | } | |
434 | ||
1da177e4 LT |
435 | /** |
436 | * initialize_pernode_data - fixup per-cpu & per-node pointers | |
437 | * | |
438 | * Each node's per-node area has a copy of the global pg_data_t list, so | |
439 | * we copy that to each node here, as well as setting the per-cpu pointer | |
440 | * to the local node data structure. The active_cpus field of the per-node | |
441 | * structure gets setup by the platform_cpu_init() function later. | |
442 | */ | |
443 | static void __init initialize_pernode_data(void) | |
444 | { | |
8d7e3517 | 445 | int cpu, node; |
1da177e4 | 446 | |
7049027c YG |
447 | scatter_node_data(); |
448 | ||
8d7e3517 | 449 | #ifdef CONFIG_SMP |
1da177e4 | 450 | /* Set the node_data pointer for each per-cpu struct */ |
2c6e6db4 | 451 | for_each_possible_early_cpu(cpu) { |
1da177e4 | 452 | node = node_cpuid[cpu].nid; |
877105cc TH |
453 | per_cpu(ia64_cpu_info, cpu).node_data = |
454 | mem_data[node].node_data; | |
1da177e4 | 455 | } |
8d7e3517 TL |
456 | #else |
457 | { | |
458 | struct cpuinfo_ia64 *cpu0_cpu_info; | |
459 | cpu = 0; | |
460 | node = node_cpuid[cpu].nid; | |
461 | cpu0_cpu_info = (struct cpuinfo_ia64 *)(__phys_per_cpu_start + | |
dd17c8f7 | 462 | ((char *)&ia64_cpu_info - __per_cpu_start)); |
8d7e3517 TL |
463 | cpu0_cpu_info->node_data = mem_data[node].node_data; |
464 | } | |
465 | #endif /* CONFIG_SMP */ | |
1da177e4 LT |
466 | } |
467 | ||
564601a5 | 468 | /** |
469 | * memory_less_node_alloc - * attempt to allocate memory on the best NUMA slit | |
470 | * node but fall back to any other node when __alloc_bootmem_node fails | |
471 | * for best. | |
472 | * @nid: node id | |
473 | * @pernodesize: size of this node's pernode data | |
564601a5 | 474 | */ |
97835245 | 475 | static void __init *memory_less_node_alloc(int nid, unsigned long pernodesize) |
564601a5 | 476 | { |
477 | void *ptr = NULL; | |
478 | u8 best = 0xff; | |
97835245 | 479 | int bestnode = -1, node, anynode = 0; |
564601a5 | 480 | |
481 | for_each_online_node(node) { | |
482 | if (node_isset(node, memory_less_mask)) | |
483 | continue; | |
484 | else if (node_distance(nid, node) < best) { | |
485 | best = node_distance(nid, node); | |
486 | bestnode = node; | |
487 | } | |
97835245 | 488 | anynode = node; |
564601a5 | 489 | } |
490 | ||
97835245 BP |
491 | if (bestnode == -1) |
492 | bestnode = anynode; | |
493 | ||
ae5a2c1c | 494 | ptr = __alloc_bootmem_node(pgdat_list[bestnode], pernodesize, |
97835245 | 495 | PERCPU_PAGE_SIZE, __pa(MAX_DMA_ADDRESS)); |
564601a5 | 496 | |
564601a5 | 497 | return ptr; |
498 | } | |
499 | ||
564601a5 | 500 | /** |
501 | * memory_less_nodes - allocate and initialize CPU only nodes pernode | |
502 | * information. | |
503 | */ | |
504 | static void __init memory_less_nodes(void) | |
505 | { | |
506 | unsigned long pernodesize; | |
507 | void *pernode; | |
508 | int node; | |
509 | ||
510 | for_each_node_mask(node, memory_less_mask) { | |
511 | pernodesize = compute_pernodesize(node); | |
97835245 | 512 | pernode = memory_less_node_alloc(node, pernodesize); |
564601a5 | 513 | fill_pernode(node, __pa(pernode), pernodesize); |
514 | } | |
515 | ||
516 | return; | |
517 | } | |
518 | ||
1da177e4 LT |
519 | /** |
520 | * find_memory - walk the EFI memory map and setup the bootmem allocator | |
521 | * | |
522 | * Called early in boot to setup the bootmem allocator, and to | |
523 | * allocate the per-cpu and per-node structures. | |
524 | */ | |
525 | void __init find_memory(void) | |
526 | { | |
527 | int node; | |
528 | ||
529 | reserve_memory(); | |
530 | ||
531 | if (num_online_nodes() == 0) { | |
532 | printk(KERN_ERR "node info missing!\n"); | |
533 | node_set_online(0); | |
534 | } | |
535 | ||
564601a5 | 536 | nodes_or(memory_less_mask, memory_less_mask, node_online_map); |
1da177e4 LT |
537 | min_low_pfn = -1; |
538 | max_low_pfn = 0; | |
539 | ||
1da177e4 LT |
540 | /* These actually end up getting called by call_pernode_memory() */ |
541 | efi_memmap_walk(filter_rsvd_memory, build_node_maps); | |
542 | efi_memmap_walk(filter_rsvd_memory, find_pernode_space); | |
a3f5c338 | 543 | efi_memmap_walk(find_max_min_low_pfn, NULL); |
1da177e4 | 544 | |
564601a5 | 545 | for_each_online_node(node) |
b61bfa3c | 546 | if (bootmem_node_data[node].node_low_pfn) { |
564601a5 | 547 | node_clear(node, memory_less_mask); |
548 | mem_data[node].min_pfn = ~0UL; | |
549 | } | |
139b8304 | 550 | |
98075d24 | 551 | efi_memmap_walk(filter_memory, register_active_ranges); |
139b8304 | 552 | |
1da177e4 LT |
553 | /* |
554 | * Initialize the boot memory maps in reverse order since that's | |
555 | * what the bootmem allocator expects | |
556 | */ | |
557 | for (node = MAX_NUMNODES - 1; node >= 0; node--) { | |
558 | unsigned long pernode, pernodesize, map; | |
559 | struct bootmem_data *bdp; | |
560 | ||
561 | if (!node_online(node)) | |
562 | continue; | |
564601a5 | 563 | else if (node_isset(node, memory_less_mask)) |
564 | continue; | |
1da177e4 | 565 | |
b61bfa3c | 566 | bdp = &bootmem_node_data[node]; |
1da177e4 LT |
567 | pernode = mem_data[node].pernode_addr; |
568 | pernodesize = mem_data[node].pernode_size; | |
569 | map = pernode + pernodesize; | |
570 | ||
ae5a2c1c | 571 | init_bootmem_node(pgdat_list[node], |
1da177e4 | 572 | map>>PAGE_SHIFT, |
3560e249 | 573 | bdp->node_min_pfn, |
1da177e4 LT |
574 | bdp->node_low_pfn); |
575 | } | |
576 | ||
577 | efi_memmap_walk(filter_rsvd_memory, free_node_bootmem); | |
578 | ||
579 | reserve_pernode_space(); | |
564601a5 | 580 | memory_less_nodes(); |
1da177e4 LT |
581 | initialize_pernode_data(); |
582 | ||
583 | max_pfn = max_low_pfn; | |
584 | ||
585 | find_initrd(); | |
586 | } | |
587 | ||
8d7e3517 | 588 | #ifdef CONFIG_SMP |
1da177e4 LT |
589 | /** |
590 | * per_cpu_init - setup per-cpu variables | |
591 | * | |
592 | * find_pernode_space() does most of this already, we just need to set | |
593 | * local_per_cpu_offset | |
594 | */ | |
ccce9bb8 | 595 | void *per_cpu_init(void) |
1da177e4 LT |
596 | { |
597 | int cpu; | |
ff741906 AR |
598 | static int first_time = 1; |
599 | ||
ff741906 AR |
600 | if (first_time) { |
601 | first_time = 0; | |
2c6e6db4 | 602 | for_each_possible_early_cpu(cpu) |
ff741906 AR |
603 | per_cpu(local_per_cpu_offset, cpu) = __per_cpu_offset[cpu]; |
604 | } | |
1da177e4 LT |
605 | |
606 | return __per_cpu_start + __per_cpu_offset[smp_processor_id()]; | |
607 | } | |
8d7e3517 | 608 | #endif /* CONFIG_SMP */ |
1da177e4 | 609 | |
1da177e4 LT |
610 | /** |
611 | * call_pernode_memory - use SRAT to call callback functions with node info | |
612 | * @start: physical start of range | |
613 | * @len: length of range | |
614 | * @arg: function to call for each range | |
615 | * | |
616 | * efi_memmap_walk() knows nothing about layout of memory across nodes. Find | |
617 | * out to which node a block of memory belongs. Ignore memory that we cannot | |
618 | * identify, and split blocks that run across multiple nodes. | |
619 | * | |
620 | * Take this opportunity to round the start address up and the end address | |
621 | * down to page boundaries. | |
622 | */ | |
623 | void call_pernode_memory(unsigned long start, unsigned long len, void *arg) | |
624 | { | |
625 | unsigned long rs, re, end = start + len; | |
626 | void (*func)(unsigned long, unsigned long, int); | |
627 | int i; | |
628 | ||
629 | start = PAGE_ALIGN(start); | |
630 | end &= PAGE_MASK; | |
631 | if (start >= end) | |
632 | return; | |
633 | ||
634 | func = arg; | |
635 | ||
636 | if (!num_node_memblks) { | |
637 | /* No SRAT table, so assume one node (node 0) */ | |
638 | if (start < end) | |
639 | (*func)(start, end - start, 0); | |
640 | return; | |
641 | } | |
642 | ||
643 | for (i = 0; i < num_node_memblks; i++) { | |
644 | rs = max(start, node_memblk[i].start_paddr); | |
645 | re = min(end, node_memblk[i].start_paddr + | |
646 | node_memblk[i].size); | |
647 | ||
648 | if (rs < re) | |
649 | (*func)(rs, re - rs, node_memblk[i].nid); | |
650 | ||
651 | if (re == end) | |
652 | break; | |
653 | } | |
654 | } | |
655 | ||
656 | /** | |
657 | * count_node_pages - callback to build per-node memory info structures | |
658 | * @start: physical start of range | |
659 | * @len: length of range | |
660 | * @node: node where this range resides | |
661 | * | |
662 | * Each node has it's own number of physical pages, DMAable pages, start, and | |
663 | * end page frame number. This routine will be called by call_pernode_memory() | |
664 | * for each piece of usable memory and will setup these values for each node. | |
665 | * Very similar to build_maps(). | |
666 | */ | |
667 | static __init int count_node_pages(unsigned long start, unsigned long len, int node) | |
668 | { | |
669 | unsigned long end = start + len; | |
670 | ||
09ae1f58 | 671 | #ifdef CONFIG_ZONE_DMA |
1da177e4 LT |
672 | if (start <= __pa(MAX_DMA_ADDRESS)) |
673 | mem_data[node].num_dma_physpages += | |
674 | (min(end, __pa(MAX_DMA_ADDRESS)) - start) >>PAGE_SHIFT; | |
09ae1f58 | 675 | #endif |
1da177e4 | 676 | start = GRANULEROUNDDOWN(start); |
1da177e4 LT |
677 | end = GRANULEROUNDUP(end); |
678 | mem_data[node].max_pfn = max(mem_data[node].max_pfn, | |
679 | end >> PAGE_SHIFT); | |
680 | mem_data[node].min_pfn = min(mem_data[node].min_pfn, | |
681 | start >> PAGE_SHIFT); | |
682 | ||
683 | return 0; | |
684 | } | |
685 | ||
686 | /** | |
687 | * paging_init - setup page tables | |
688 | * | |
689 | * paging_init() sets up the page tables for each node of the system and frees | |
690 | * the bootmem allocator memory for general use. | |
691 | */ | |
692 | void __init paging_init(void) | |
693 | { | |
694 | unsigned long max_dma; | |
1da177e4 | 695 | unsigned long pfn_offset = 0; |
05e0caad | 696 | unsigned long max_pfn = 0; |
1da177e4 | 697 | int node; |
05e0caad | 698 | unsigned long max_zone_pfns[MAX_NR_ZONES]; |
1da177e4 LT |
699 | |
700 | max_dma = virt_to_phys((void *) MAX_DMA_ADDRESS) >> PAGE_SHIFT; | |
701 | ||
1da177e4 LT |
702 | efi_memmap_walk(filter_rsvd_memory, count_node_pages); |
703 | ||
524fd988 BP |
704 | sparse_memory_present_with_active_regions(MAX_NUMNODES); |
705 | sparse_init(); | |
706 | ||
2d4b1fa2 | 707 | #ifdef CONFIG_VIRTUAL_MEM_MAP |
126b3fcd | 708 | VMALLOC_END -= PAGE_ALIGN(ALIGN(max_low_pfn, MAX_ORDER_NR_PAGES) * |
921eea1c | 709 | sizeof(struct page)); |
126b3fcd | 710 | vmem_map = (struct page *) VMALLOC_END; |
564601a5 | 711 | efi_memmap_walk(create_mem_map_page_table, NULL); |
712 | printk("Virtual mem_map starts at 0x%p\n", vmem_map); | |
2d4b1fa2 | 713 | #endif |
564601a5 | 714 | |
1da177e4 | 715 | for_each_online_node(node) { |
1da177e4 LT |
716 | pfn_offset = mem_data[node].min_pfn; |
717 | ||
2d4b1fa2 | 718 | #ifdef CONFIG_VIRTUAL_MEM_MAP |
1da177e4 | 719 | NODE_DATA(node)->node_mem_map = vmem_map + pfn_offset; |
2d4b1fa2 | 720 | #endif |
05e0caad MG |
721 | if (mem_data[node].max_pfn > max_pfn) |
722 | max_pfn = mem_data[node].max_pfn; | |
1da177e4 LT |
723 | } |
724 | ||
6391af17 | 725 | memset(max_zone_pfns, 0, sizeof(max_zone_pfns)); |
09ae1f58 | 726 | #ifdef CONFIG_ZONE_DMA |
05e0caad | 727 | max_zone_pfns[ZONE_DMA] = max_dma; |
09ae1f58 | 728 | #endif |
05e0caad MG |
729 | max_zone_pfns[ZONE_NORMAL] = max_pfn; |
730 | free_area_init_nodes(max_zone_pfns); | |
731 | ||
1da177e4 LT |
732 | zero_page_memmap_ptr = virt_to_page(ia64_imva(empty_zero_page)); |
733 | } | |
7049027c | 734 | |
a3142c8e | 735 | #ifdef CONFIG_MEMORY_HOTPLUG |
dd0932d9 YG |
736 | pg_data_t *arch_alloc_nodedata(int nid) |
737 | { | |
738 | unsigned long size = compute_pernodesize(nid); | |
739 | ||
740 | return kzalloc(size, GFP_KERNEL); | |
741 | } | |
742 | ||
743 | void arch_free_nodedata(pg_data_t *pgdat) | |
744 | { | |
745 | kfree(pgdat); | |
746 | } | |
747 | ||
7049027c YG |
748 | void arch_refresh_nodedata(int update_node, pg_data_t *update_pgdat) |
749 | { | |
750 | pgdat_list[update_node] = update_pgdat; | |
751 | scatter_node_data(); | |
752 | } | |
a3142c8e | 753 | #endif |
ef229c5a CL |
754 | |
755 | #ifdef CONFIG_SPARSEMEM_VMEMMAP | |
0aad818b | 756 | int __meminit vmemmap_populate(unsigned long start, unsigned long end, int node) |
ef229c5a | 757 | { |
0aad818b | 758 | return vmemmap_populate_basepages(start, end, node); |
ef229c5a | 759 | } |
46723bfa | 760 | |
0aad818b | 761 | void vmemmap_free(unsigned long start, unsigned long end) |
0197518c TC |
762 | { |
763 | } | |
ef229c5a | 764 | #endif |