]>
Commit | Line | Data |
---|---|---|
1da177e4 LT |
1 | /* |
2 | * linux/arch/x86_64/mm/init.c | |
3 | * | |
4 | * Copyright (C) 1995 Linus Torvalds | |
5 | * Copyright (C) 2000 Pavel Machek <pavel@suse.cz> | |
6 | * Copyright (C) 2002,2003 Andi Kleen <ak@suse.de> | |
7 | */ | |
8 | ||
1da177e4 LT |
9 | #include <linux/signal.h> |
10 | #include <linux/sched.h> | |
11 | #include <linux/kernel.h> | |
12 | #include <linux/errno.h> | |
13 | #include <linux/string.h> | |
14 | #include <linux/types.h> | |
15 | #include <linux/ptrace.h> | |
16 | #include <linux/mman.h> | |
17 | #include <linux/mm.h> | |
18 | #include <linux/swap.h> | |
19 | #include <linux/smp.h> | |
20 | #include <linux/init.h> | |
11034d55 | 21 | #include <linux/initrd.h> |
1da177e4 LT |
22 | #include <linux/pagemap.h> |
23 | #include <linux/bootmem.h> | |
24 | #include <linux/proc_fs.h> | |
59170891 | 25 | #include <linux/pci.h> |
6fb14755 | 26 | #include <linux/pfn.h> |
c9cf5528 | 27 | #include <linux/poison.h> |
17a941d8 | 28 | #include <linux/dma-mapping.h> |
44df75e6 MT |
29 | #include <linux/module.h> |
30 | #include <linux/memory_hotplug.h> | |
ae32b129 | 31 | #include <linux/nmi.h> |
1da177e4 LT |
32 | |
33 | #include <asm/processor.h> | |
34 | #include <asm/system.h> | |
35 | #include <asm/uaccess.h> | |
36 | #include <asm/pgtable.h> | |
37 | #include <asm/pgalloc.h> | |
38 | #include <asm/dma.h> | |
39 | #include <asm/fixmap.h> | |
40 | #include <asm/e820.h> | |
41 | #include <asm/apic.h> | |
42 | #include <asm/tlb.h> | |
43 | #include <asm/mmu_context.h> | |
44 | #include <asm/proto.h> | |
45 | #include <asm/smp.h> | |
2bc0414e | 46 | #include <asm/sections.h> |
718fc13b | 47 | #include <asm/kdebug.h> |
aaa64e04 | 48 | #include <asm/numa.h> |
7bfeab9a | 49 | #include <asm/cacheflush.h> |
1da177e4 | 50 | |
064d25f1 YL |
51 | /* |
52 | * end_pfn only includes RAM, while max_pfn_mapped includes all e820 entries. | |
53 | * The direct mapping extends to max_pfn_mapped, so that we can directly access | |
54 | * apertures, ACPI and other tables without having to play with fixmaps. | |
55 | */ | |
56 | unsigned long max_pfn_mapped; | |
57 | ||
e18c6874 AK |
58 | static unsigned long dma_reserve __initdata; |
59 | ||
1da177e4 LT |
60 | DEFINE_PER_CPU(struct mmu_gather, mmu_gathers); |
61 | ||
00d1c5e0 IM |
62 | int direct_gbpages __meminitdata |
63 | #ifdef CONFIG_DIRECT_GBPAGES | |
64 | = 1 | |
65 | #endif | |
66 | ; | |
67 | ||
68 | static int __init parse_direct_gbpages_off(char *arg) | |
69 | { | |
70 | direct_gbpages = 0; | |
71 | return 0; | |
72 | } | |
73 | early_param("nogbpages", parse_direct_gbpages_off); | |
74 | ||
75 | static int __init parse_direct_gbpages_on(char *arg) | |
76 | { | |
77 | direct_gbpages = 1; | |
78 | return 0; | |
79 | } | |
80 | early_param("gbpages", parse_direct_gbpages_on); | |
81 | ||
1da177e4 LT |
82 | /* |
83 | * NOTE: pagetable_init alloc all the fixmap pagetables contiguous on the | |
84 | * physical space so we can cache the place of the first one and move | |
85 | * around without checking the pgd every time. | |
86 | */ | |
87 | ||
88 | void show_mem(void) | |
89 | { | |
e92343cc AK |
90 | long i, total = 0, reserved = 0; |
91 | long shared = 0, cached = 0; | |
1da177e4 | 92 | struct page *page; |
14a62c34 | 93 | pg_data_t *pgdat; |
1da177e4 | 94 | |
e92343cc | 95 | printk(KERN_INFO "Mem-info:\n"); |
1da177e4 | 96 | show_free_areas(); |
ec936fc5 | 97 | for_each_online_pgdat(pgdat) { |
14a62c34 TG |
98 | for (i = 0; i < pgdat->node_spanned_pages; ++i) { |
99 | /* | |
100 | * This loop can take a while with 256 GB and | |
101 | * 4k pages so defer the NMI watchdog: | |
102 | */ | |
103 | if (unlikely(i % MAX_ORDER_NR_PAGES == 0)) | |
ae32b129 | 104 | touch_nmi_watchdog(); |
14a62c34 | 105 | |
12710a56 BP |
106 | if (!pfn_valid(pgdat->node_start_pfn + i)) |
107 | continue; | |
14a62c34 | 108 | |
1da177e4 LT |
109 | page = pfn_to_page(pgdat->node_start_pfn + i); |
110 | total++; | |
e92343cc AK |
111 | if (PageReserved(page)) |
112 | reserved++; | |
113 | else if (PageSwapCache(page)) | |
114 | cached++; | |
115 | else if (page_count(page)) | |
116 | shared += page_count(page) - 1; | |
14a62c34 | 117 | } |
1da177e4 | 118 | } |
14a62c34 TG |
119 | printk(KERN_INFO "%lu pages of RAM\n", total); |
120 | printk(KERN_INFO "%lu reserved pages\n", reserved); | |
121 | printk(KERN_INFO "%lu pages shared\n", shared); | |
122 | printk(KERN_INFO "%lu pages swap cached\n", cached); | |
1da177e4 LT |
123 | } |
124 | ||
1da177e4 LT |
125 | int after_bootmem; |
126 | ||
5f44a669 | 127 | static __init void *spp_getpage(void) |
14a62c34 | 128 | { |
1da177e4 | 129 | void *ptr; |
14a62c34 | 130 | |
1da177e4 | 131 | if (after_bootmem) |
14a62c34 | 132 | ptr = (void *) get_zeroed_page(GFP_ATOMIC); |
1da177e4 LT |
133 | else |
134 | ptr = alloc_bootmem_pages(PAGE_SIZE); | |
14a62c34 TG |
135 | |
136 | if (!ptr || ((unsigned long)ptr & ~PAGE_MASK)) { | |
137 | panic("set_pte_phys: cannot allocate page data %s\n", | |
138 | after_bootmem ? "after bootmem" : ""); | |
139 | } | |
1da177e4 | 140 | |
10f22dde | 141 | pr_debug("spp_getpage %p\n", ptr); |
14a62c34 | 142 | |
1da177e4 | 143 | return ptr; |
14a62c34 | 144 | } |
1da177e4 | 145 | |
d494a961 JF |
146 | void |
147 | set_pte_vaddr(unsigned long vaddr, pte_t new_pte) | |
1da177e4 LT |
148 | { |
149 | pgd_t *pgd; | |
150 | pud_t *pud; | |
151 | pmd_t *pmd; | |
d494a961 | 152 | pte_t *pte; |
1da177e4 | 153 | |
d494a961 | 154 | pr_debug("set_pte_vaddr %lx to %lx\n", vaddr, native_pte_val(new_pte)); |
1da177e4 LT |
155 | |
156 | pgd = pgd_offset_k(vaddr); | |
157 | if (pgd_none(*pgd)) { | |
10f22dde IM |
158 | printk(KERN_ERR |
159 | "PGD FIXMAP MISSING, it should be setup in head.S!\n"); | |
1da177e4 LT |
160 | return; |
161 | } | |
162 | pud = pud_offset(pgd, vaddr); | |
163 | if (pud_none(*pud)) { | |
14a62c34 | 164 | pmd = (pmd_t *) spp_getpage(); |
bb23e403 | 165 | pud_populate(&init_mm, pud, pmd); |
1da177e4 | 166 | if (pmd != pmd_offset(pud, 0)) { |
10f22dde | 167 | printk(KERN_ERR "PAGETABLE BUG #01! %p <-> %p\n", |
14a62c34 | 168 | pmd, pmd_offset(pud, 0)); |
1da177e4 LT |
169 | return; |
170 | } | |
171 | } | |
172 | pmd = pmd_offset(pud, vaddr); | |
173 | if (pmd_none(*pmd)) { | |
174 | pte = (pte_t *) spp_getpage(); | |
bb23e403 | 175 | pmd_populate_kernel(&init_mm, pmd, pte); |
1da177e4 | 176 | if (pte != pte_offset_kernel(pmd, 0)) { |
10f22dde | 177 | printk(KERN_ERR "PAGETABLE BUG #02!\n"); |
1da177e4 LT |
178 | return; |
179 | } | |
180 | } | |
1da177e4 LT |
181 | |
182 | pte = pte_offset_kernel(pmd, vaddr); | |
70c9f590 | 183 | if (!pte_none(*pte) && pte_val(new_pte) && |
1da177e4 LT |
184 | pte_val(*pte) != (pte_val(new_pte) & __supported_pte_mask)) |
185 | pte_ERROR(*pte); | |
186 | set_pte(pte, new_pte); | |
187 | ||
188 | /* | |
189 | * It's enough to flush this one mapping. | |
190 | * (PGE mappings get flushed as well) | |
191 | */ | |
192 | __flush_tlb_one(vaddr); | |
193 | } | |
194 | ||
31eedd82 | 195 | /* |
88f3aec7 IM |
196 | * The head.S code sets up the kernel high mapping: |
197 | * | |
198 | * from __START_KERNEL_map to __START_KERNEL_map + size (== _end-_text) | |
31eedd82 TG |
199 | * |
200 | * phys_addr holds the negative offset to the kernel, which is added | |
201 | * to the compile time generated pmds. This results in invalid pmds up | |
202 | * to the point where we hit the physaddr 0 mapping. | |
203 | * | |
204 | * We limit the mappings to the region from _text to _end. _end is | |
205 | * rounded up to the 2MB boundary. This catches the invalid pmds as | |
206 | * well, as they are located before _text: | |
207 | */ | |
208 | void __init cleanup_highmap(void) | |
209 | { | |
210 | unsigned long vaddr = __START_KERNEL_map; | |
211 | unsigned long end = round_up((unsigned long)_end, PMD_SIZE) - 1; | |
212 | pmd_t *pmd = level2_kernel_pgt; | |
213 | pmd_t *last_pmd = pmd + PTRS_PER_PMD; | |
214 | ||
215 | for (; pmd < last_pmd; pmd++, vaddr += PMD_SIZE) { | |
2884f110 | 216 | if (pmd_none(*pmd)) |
31eedd82 TG |
217 | continue; |
218 | if (vaddr < (unsigned long) _text || vaddr > end) | |
219 | set_pmd(pmd, __pmd(0)); | |
220 | } | |
221 | } | |
222 | ||
75175278 AK |
223 | static unsigned long __initdata table_start; |
224 | static unsigned long __meminitdata table_end; | |
d86623a0 | 225 | static unsigned long __meminitdata table_top; |
1da177e4 | 226 | |
dafe41ee | 227 | static __meminit void *alloc_low_page(unsigned long *phys) |
14a62c34 | 228 | { |
dafe41ee | 229 | unsigned long pfn = table_end++; |
1da177e4 LT |
230 | void *adr; |
231 | ||
44df75e6 MT |
232 | if (after_bootmem) { |
233 | adr = (void *)get_zeroed_page(GFP_ATOMIC); | |
234 | *phys = __pa(adr); | |
14a62c34 | 235 | |
44df75e6 MT |
236 | return adr; |
237 | } | |
238 | ||
d86623a0 | 239 | if (pfn >= table_top) |
14a62c34 | 240 | panic("alloc_low_page: ran out of memory"); |
dafe41ee VG |
241 | |
242 | adr = early_ioremap(pfn * PAGE_SIZE, PAGE_SIZE); | |
44df75e6 | 243 | memset(adr, 0, PAGE_SIZE); |
dafe41ee VG |
244 | *phys = pfn * PAGE_SIZE; |
245 | return adr; | |
246 | } | |
1da177e4 | 247 | |
dafe41ee | 248 | static __meminit void unmap_low_page(void *adr) |
14a62c34 | 249 | { |
44df75e6 MT |
250 | if (after_bootmem) |
251 | return; | |
252 | ||
dafe41ee | 253 | early_iounmap(adr, PAGE_SIZE); |
14a62c34 | 254 | } |
1da177e4 | 255 | |
4f9c11dd JF |
256 | static void __meminit |
257 | phys_pte_init(pte_t *pte_page, unsigned long addr, unsigned long end) | |
258 | { | |
259 | unsigned pages = 0; | |
260 | int i; | |
261 | pte_t *pte = pte_page + pte_index(addr); | |
262 | ||
263 | for(i = pte_index(addr); i < PTRS_PER_PTE; i++, addr += PAGE_SIZE, pte++) { | |
264 | ||
265 | if (addr >= end) { | |
266 | if (!after_bootmem) { | |
267 | for(; i < PTRS_PER_PTE; i++, pte++) | |
268 | set_pte(pte, __pte(0)); | |
269 | } | |
270 | break; | |
271 | } | |
272 | ||
273 | if (pte_val(*pte)) | |
274 | continue; | |
275 | ||
276 | if (0) | |
277 | printk(" pte=%p addr=%lx pte=%016lx\n", | |
278 | pte, addr, pfn_pte(addr >> PAGE_SHIFT, PAGE_KERNEL).pte); | |
279 | set_pte(pte, pfn_pte(addr >> PAGE_SHIFT, PAGE_KERNEL)); | |
280 | pages++; | |
281 | } | |
282 | update_page_count(PG_LEVEL_4K, pages); | |
283 | } | |
284 | ||
285 | static void __meminit | |
286 | phys_pte_update(pmd_t *pmd, unsigned long address, unsigned long end) | |
287 | { | |
288 | pte_t *pte = (pte_t *)pmd_page_vaddr(*pmd); | |
289 | ||
290 | phys_pte_init(pte, address, end); | |
291 | } | |
292 | ||
cc615032 | 293 | static unsigned long __meminit |
6ad91658 | 294 | phys_pmd_init(pmd_t *pmd_page, unsigned long address, unsigned long end) |
44df75e6 | 295 | { |
ce0c0e50 AK |
296 | unsigned long pages = 0; |
297 | ||
6ad91658 | 298 | int i = pmd_index(address); |
44df75e6 | 299 | |
6ad91658 | 300 | for (; i < PTRS_PER_PMD; i++, address += PMD_SIZE) { |
4f9c11dd | 301 | unsigned long pte_phys; |
6ad91658 | 302 | pmd_t *pmd = pmd_page + pmd_index(address); |
4f9c11dd | 303 | pte_t *pte; |
44df75e6 | 304 | |
5f51e139 | 305 | if (address >= end) { |
14a62c34 | 306 | if (!after_bootmem) { |
5f51e139 JB |
307 | for (; i < PTRS_PER_PMD; i++, pmd++) |
308 | set_pmd(pmd, __pmd(0)); | |
14a62c34 | 309 | } |
44df75e6 MT |
310 | break; |
311 | } | |
6ad91658 | 312 | |
4f9c11dd JF |
313 | if (pmd_val(*pmd)) { |
314 | phys_pte_update(pmd, address, end); | |
315 | continue; | |
316 | } | |
317 | ||
318 | if (cpu_has_pse) { | |
319 | pages++; | |
320 | set_pte((pte_t *)pmd, | |
321 | pfn_pte(address >> PAGE_SHIFT, PAGE_KERNEL_LARGE)); | |
6ad91658 | 322 | continue; |
4f9c11dd | 323 | } |
6ad91658 | 324 | |
4f9c11dd JF |
325 | pte = alloc_low_page(&pte_phys); |
326 | phys_pte_init(pte, address, end); | |
327 | unmap_low_page(pte); | |
328 | ||
329 | pmd_populate_kernel(&init_mm, pmd, __va(pte_phys)); | |
44df75e6 | 330 | } |
ce0c0e50 | 331 | update_page_count(PG_LEVEL_2M, pages); |
cc615032 | 332 | return address; |
44df75e6 MT |
333 | } |
334 | ||
cc615032 | 335 | static unsigned long __meminit |
44df75e6 MT |
336 | phys_pmd_update(pud_t *pud, unsigned long address, unsigned long end) |
337 | { | |
14a62c34 | 338 | pmd_t *pmd = pmd_offset(pud, 0); |
cc615032 AK |
339 | unsigned long last_map_addr; |
340 | ||
6ad91658 | 341 | spin_lock(&init_mm.page_table_lock); |
cc615032 | 342 | last_map_addr = phys_pmd_init(pmd, address, end); |
6ad91658 KM |
343 | spin_unlock(&init_mm.page_table_lock); |
344 | __flush_tlb_all(); | |
cc615032 | 345 | return last_map_addr; |
44df75e6 MT |
346 | } |
347 | ||
cc615032 | 348 | static unsigned long __meminit |
14a62c34 TG |
349 | phys_pud_init(pud_t *pud_page, unsigned long addr, unsigned long end) |
350 | { | |
ce0c0e50 | 351 | unsigned long pages = 0; |
cc615032 | 352 | unsigned long last_map_addr = end; |
6ad91658 | 353 | int i = pud_index(addr); |
44df75e6 | 354 | |
14a62c34 | 355 | for (; i < PTRS_PER_PUD; i++, addr = (addr & PUD_MASK) + PUD_SIZE) { |
6ad91658 KM |
356 | unsigned long pmd_phys; |
357 | pud_t *pud = pud_page + pud_index(addr); | |
1da177e4 LT |
358 | pmd_t *pmd; |
359 | ||
6ad91658 | 360 | if (addr >= end) |
1da177e4 | 361 | break; |
1da177e4 | 362 | |
14a62c34 TG |
363 | if (!after_bootmem && |
364 | !e820_any_mapped(addr, addr+PUD_SIZE, 0)) { | |
365 | set_pud(pud, __pud(0)); | |
1da177e4 | 366 | continue; |
14a62c34 | 367 | } |
1da177e4 | 368 | |
6ad91658 | 369 | if (pud_val(*pud)) { |
ef925766 | 370 | if (!pud_large(*pud)) |
cc615032 | 371 | last_map_addr = phys_pmd_update(pud, addr, end); |
ef925766 AK |
372 | continue; |
373 | } | |
374 | ||
375 | if (direct_gbpages) { | |
ce0c0e50 | 376 | pages++; |
ef925766 AK |
377 | set_pte((pte_t *)pud, |
378 | pfn_pte(addr >> PAGE_SHIFT, PAGE_KERNEL_LARGE)); | |
cc615032 | 379 | last_map_addr = (addr & PUD_MASK) + PUD_SIZE; |
6ad91658 KM |
380 | continue; |
381 | } | |
382 | ||
dafe41ee | 383 | pmd = alloc_low_page(&pmd_phys); |
14a62c34 | 384 | |
44df75e6 | 385 | spin_lock(&init_mm.page_table_lock); |
cc615032 | 386 | last_map_addr = phys_pmd_init(pmd, addr, end); |
4f9c11dd JF |
387 | unmap_low_page(pmd); |
388 | pud_populate(&init_mm, pud, __va(pmd_phys)); | |
44df75e6 | 389 | spin_unlock(&init_mm.page_table_lock); |
14a62c34 | 390 | |
1da177e4 | 391 | } |
1a2b4412 | 392 | __flush_tlb_all(); |
ce0c0e50 | 393 | update_page_count(PG_LEVEL_1G, pages); |
cc615032 | 394 | |
1a0db38e | 395 | return last_map_addr; |
14a62c34 | 396 | } |
1da177e4 | 397 | |
4f9c11dd JF |
398 | static unsigned long __meminit |
399 | phys_pud_update(pgd_t *pgd, unsigned long addr, unsigned long end) | |
400 | { | |
401 | pud_t *pud; | |
402 | ||
403 | pud = (pud_t *)pgd_page_vaddr(*pgd); | |
404 | ||
405 | return phys_pud_init(pud, addr, end); | |
406 | } | |
407 | ||
1da177e4 LT |
408 | static void __init find_early_table_space(unsigned long end) |
409 | { | |
4f9c11dd | 410 | unsigned long puds, tables, start; |
1da177e4 LT |
411 | |
412 | puds = (end + PUD_SIZE - 1) >> PUD_SHIFT; | |
ef925766 AK |
413 | tables = round_up(puds * sizeof(pud_t), PAGE_SIZE); |
414 | if (!direct_gbpages) { | |
4f9c11dd | 415 | unsigned long pmds = (end + PMD_SIZE - 1) >> PMD_SHIFT; |
ef925766 AK |
416 | tables += round_up(pmds * sizeof(pmd_t), PAGE_SIZE); |
417 | } | |
4f9c11dd JF |
418 | if (!cpu_has_pse) { |
419 | unsigned long ptes = (end + PAGE_SIZE - 1) >> PAGE_SHIFT; | |
420 | tables += round_up(ptes * sizeof(pte_t), PAGE_SIZE); | |
421 | } | |
1da177e4 | 422 | |
14a62c34 TG |
423 | /* |
424 | * RED-PEN putting page tables only on node 0 could | |
425 | * cause a hotspot and fill up ZONE_DMA. The page tables | |
426 | * need roughly 0.5KB per GB. | |
427 | */ | |
428 | start = 0x8000; | |
24a5da73 | 429 | table_start = find_e820_area(start, end, tables, PAGE_SIZE); |
1da177e4 LT |
430 | if (table_start == -1UL) |
431 | panic("Cannot find space for the kernel page tables"); | |
432 | ||
433 | table_start >>= PAGE_SHIFT; | |
434 | table_end = table_start; | |
d86623a0 | 435 | table_top = table_start + (tables >> PAGE_SHIFT); |
44df75e6 | 436 | |
d86623a0 YL |
437 | printk(KERN_DEBUG "kernel direct mapping tables up to %lx @ %lx-%lx\n", |
438 | end, table_start << PAGE_SHIFT, table_top << PAGE_SHIFT); | |
1da177e4 LT |
439 | } |
440 | ||
ef925766 AK |
441 | static void __init init_gbpages(void) |
442 | { | |
443 | if (direct_gbpages && cpu_has_gbpages) | |
444 | printk(KERN_INFO "Using GB pages for direct mapping\n"); | |
445 | else | |
446 | direct_gbpages = 0; | |
447 | } | |
448 | ||
03273184 | 449 | #ifdef CONFIG_MEMTEST |
c64df707 YL |
450 | |
451 | static void __init memtest(unsigned long start_phys, unsigned long size, | |
452 | unsigned pattern) | |
272b9cad YL |
453 | { |
454 | unsigned long i; | |
455 | unsigned long *start; | |
456 | unsigned long start_bad; | |
457 | unsigned long last_bad; | |
458 | unsigned long val; | |
459 | unsigned long start_phys_aligned; | |
460 | unsigned long count; | |
461 | unsigned long incr; | |
462 | ||
463 | switch (pattern) { | |
464 | case 0: | |
465 | val = 0UL; | |
466 | break; | |
467 | case 1: | |
468 | val = -1UL; | |
469 | break; | |
470 | case 2: | |
471 | val = 0x5555555555555555UL; | |
472 | break; | |
473 | case 3: | |
474 | val = 0xaaaaaaaaaaaaaaaaUL; | |
475 | break; | |
476 | default: | |
477 | return; | |
478 | } | |
479 | ||
480 | incr = sizeof(unsigned long); | |
481 | start_phys_aligned = ALIGN(start_phys, incr); | |
482 | count = (size - (start_phys_aligned - start_phys))/incr; | |
483 | start = __va(start_phys_aligned); | |
484 | start_bad = 0; | |
485 | last_bad = 0; | |
486 | ||
487 | for (i = 0; i < count; i++) | |
488 | start[i] = val; | |
489 | for (i = 0; i < count; i++, start++, start_phys_aligned += incr) { | |
490 | if (*start != val) { | |
491 | if (start_phys_aligned == last_bad + incr) { | |
492 | last_bad += incr; | |
493 | } else { | |
494 | if (start_bad) { | |
dcfe9465 | 495 | printk(KERN_CONT "\n %016lx bad mem addr %016lx - %016lx reserved", |
272b9cad YL |
496 | val, start_bad, last_bad + incr); |
497 | reserve_early(start_bad, last_bad - start_bad, "BAD RAM"); | |
498 | } | |
499 | start_bad = last_bad = start_phys_aligned; | |
500 | } | |
501 | } | |
502 | } | |
503 | if (start_bad) { | |
dcfe9465 | 504 | printk(KERN_CONT "\n %016lx bad mem addr %016lx - %016lx reserved", |
272b9cad YL |
505 | val, start_bad, last_bad + incr); |
506 | reserve_early(start_bad, last_bad - start_bad, "BAD RAM"); | |
507 | } | |
508 | ||
509 | } | |
510 | ||
03273184 YL |
511 | /* default is disabled */ |
512 | static int memtest_pattern __initdata; | |
c64df707 | 513 | |
272b9cad YL |
514 | static int __init parse_memtest(char *arg) |
515 | { | |
516 | if (arg) | |
c64df707 | 517 | memtest_pattern = simple_strtoul(arg, NULL, 0); |
272b9cad YL |
518 | return 0; |
519 | } | |
520 | ||
521 | early_param("memtest", parse_memtest); | |
522 | ||
523 | static void __init early_memtest(unsigned long start, unsigned long end) | |
524 | { | |
27df66a4 | 525 | u64 t_start, t_size; |
272b9cad YL |
526 | unsigned pattern; |
527 | ||
c64df707 YL |
528 | if (!memtest_pattern) |
529 | return; | |
530 | ||
531 | printk(KERN_INFO "early_memtest: pattern num %d", memtest_pattern); | |
272b9cad YL |
532 | for (pattern = 0; pattern < memtest_pattern; pattern++) { |
533 | t_start = start; | |
534 | t_size = 0; | |
535 | while (t_start < end) { | |
536 | t_start = find_e820_area_size(t_start, &t_size, 1); | |
537 | ||
538 | /* done ? */ | |
539 | if (t_start >= end) | |
540 | break; | |
541 | if (t_start + t_size > end) | |
542 | t_size = end - t_start; | |
543 | ||
27df66a4 AM |
544 | printk(KERN_CONT "\n %016llx - %016llx pattern %d", |
545 | (unsigned long long)t_start, | |
546 | (unsigned long long)t_start + t_size, pattern); | |
272b9cad YL |
547 | |
548 | memtest(t_start, t_size, pattern); | |
549 | ||
550 | t_start += t_size; | |
551 | } | |
552 | } | |
c64df707 | 553 | printk(KERN_CONT "\n"); |
272b9cad | 554 | } |
c64df707 YL |
555 | #else |
556 | static void __init early_memtest(unsigned long start, unsigned long end) | |
557 | { | |
558 | } | |
559 | #endif | |
272b9cad | 560 | |
14a62c34 TG |
561 | /* |
562 | * Setup the direct mapping of the physical memory at PAGE_OFFSET. | |
563 | * This runs before bootmem is initialized and gets pages directly from | |
564 | * the physical memory. To access them they are temporarily mapped. | |
565 | */ | |
cc615032 | 566 | unsigned long __init_refok init_memory_mapping(unsigned long start, unsigned long end) |
14a62c34 | 567 | { |
cc615032 | 568 | unsigned long next, last_map_addr = end; |
272b9cad | 569 | unsigned long start_phys = start, end_phys = end; |
1da177e4 | 570 | |
272b9cad | 571 | printk(KERN_INFO "init_memory_mapping\n"); |
1da177e4 | 572 | |
14a62c34 | 573 | /* |
1da177e4 | 574 | * Find space for the kernel direct mapping tables. |
14a62c34 TG |
575 | * |
576 | * Later we should allocate these tables in the local node of the | |
577 | * memory mapped. Unfortunately this is done currently before the | |
578 | * nodes are discovered. | |
1da177e4 | 579 | */ |
ef925766 AK |
580 | if (!after_bootmem) { |
581 | init_gbpages(); | |
44df75e6 | 582 | find_early_table_space(end); |
ef925766 | 583 | } |
1da177e4 LT |
584 | |
585 | start = (unsigned long)__va(start); | |
586 | end = (unsigned long)__va(end); | |
587 | ||
588 | for (; start < end; start = next) { | |
44df75e6 | 589 | pgd_t *pgd = pgd_offset_k(start); |
14a62c34 | 590 | unsigned long pud_phys; |
44df75e6 MT |
591 | pud_t *pud; |
592 | ||
4f9c11dd JF |
593 | next = start + PGDIR_SIZE; |
594 | if (next > end) | |
595 | next = end; | |
596 | ||
597 | if (pgd_val(*pgd)) { | |
598 | last_map_addr = phys_pud_update(pgd, __pa(start), __pa(end)); | |
599 | continue; | |
600 | } | |
601 | ||
44df75e6 | 602 | if (after_bootmem) |
d2ae5b5f | 603 | pud = pud_offset(pgd, start & PGDIR_MASK); |
44df75e6 | 604 | else |
dafe41ee | 605 | pud = alloc_low_page(&pud_phys); |
44df75e6 | 606 | |
cc615032 | 607 | last_map_addr = phys_pud_init(pud, __pa(start), __pa(next)); |
4f9c11dd | 608 | unmap_low_page(pud); |
44df75e6 | 609 | if (!after_bootmem) |
bb23e403 JF |
610 | pgd_populate(&init_mm, pgd_offset_k(start), |
611 | __va(pud_phys)); | |
14a62c34 | 612 | } |
1da177e4 | 613 | |
44df75e6 | 614 | if (!after_bootmem) |
f51c9452 | 615 | mmu_cr4_features = read_cr4(); |
1da177e4 | 616 | __flush_tlb_all(); |
75175278 | 617 | |
24a5da73 YL |
618 | if (!after_bootmem) |
619 | reserve_early(table_start << PAGE_SHIFT, | |
620 | table_end << PAGE_SHIFT, "PGTABLE"); | |
272b9cad YL |
621 | |
622 | if (!after_bootmem) | |
623 | early_memtest(start_phys, end_phys); | |
cc615032 | 624 | |
1a0db38e | 625 | return last_map_addr >> PAGE_SHIFT; |
1da177e4 LT |
626 | } |
627 | ||
2b97690f | 628 | #ifndef CONFIG_NUMA |
1f75d7e3 YL |
629 | void __init initmem_init(unsigned long start_pfn, unsigned long end_pfn) |
630 | { | |
631 | unsigned long bootmap_size, bootmap; | |
632 | ||
633 | bootmap_size = bootmem_bootmap_pages(end_pfn)<<PAGE_SHIFT; | |
634 | bootmap = find_e820_area(0, end_pfn<<PAGE_SHIFT, bootmap_size, | |
635 | PAGE_SIZE); | |
636 | if (bootmap == -1L) | |
637 | panic("Cannot find bootmem map of size %ld\n", bootmap_size); | |
346cafec YL |
638 | /* don't touch min_low_pfn */ |
639 | bootmap_size = init_bootmem_node(NODE_DATA(0), bootmap >> PAGE_SHIFT, | |
640 | 0, end_pfn); | |
1f75d7e3 YL |
641 | e820_register_active_regions(0, start_pfn, end_pfn); |
642 | free_bootmem_with_active_regions(0, end_pfn); | |
643 | early_res_to_bootmem(0, end_pfn<<PAGE_SHIFT); | |
644 | reserve_bootmem(bootmap, bootmap_size, BOOTMEM_DEFAULT); | |
645 | } | |
646 | ||
1da177e4 LT |
647 | void __init paging_init(void) |
648 | { | |
6391af17 | 649 | unsigned long max_zone_pfns[MAX_NR_ZONES]; |
14a62c34 | 650 | |
6391af17 MG |
651 | memset(max_zone_pfns, 0, sizeof(max_zone_pfns)); |
652 | max_zone_pfns[ZONE_DMA] = MAX_DMA_PFN; | |
653 | max_zone_pfns[ZONE_DMA32] = MAX_DMA32_PFN; | |
c987d12f | 654 | max_zone_pfns[ZONE_NORMAL] = max_pfn; |
6391af17 | 655 | |
c987d12f | 656 | memory_present(0, 0, max_pfn); |
44df75e6 | 657 | sparse_init(); |
5cb248ab | 658 | free_area_init_nodes(max_zone_pfns); |
1da177e4 LT |
659 | } |
660 | #endif | |
661 | ||
44df75e6 MT |
662 | /* |
663 | * Memory hotplug specific functions | |
44df75e6 | 664 | */ |
bc02af93 | 665 | #ifdef CONFIG_MEMORY_HOTPLUG |
9d99aaa3 AK |
666 | /* |
667 | * Memory is added always to NORMAL zone. This means you will never get | |
668 | * additional DMA/DMA32 memory. | |
669 | */ | |
bc02af93 | 670 | int arch_add_memory(int nid, u64 start, u64 size) |
44df75e6 | 671 | { |
bc02af93 | 672 | struct pglist_data *pgdat = NODE_DATA(nid); |
776ed98b | 673 | struct zone *zone = pgdat->node_zones + ZONE_NORMAL; |
cc615032 | 674 | unsigned long last_mapped_pfn, start_pfn = start >> PAGE_SHIFT; |
44df75e6 MT |
675 | unsigned long nr_pages = size >> PAGE_SHIFT; |
676 | int ret; | |
677 | ||
cc615032 AK |
678 | last_mapped_pfn = init_memory_mapping(start, start + size-1); |
679 | if (last_mapped_pfn > max_pfn_mapped) | |
680 | max_pfn_mapped = last_mapped_pfn; | |
45e0b78b | 681 | |
44df75e6 | 682 | ret = __add_pages(zone, start_pfn, nr_pages); |
10f22dde | 683 | WARN_ON(1); |
44df75e6 | 684 | |
44df75e6 | 685 | return ret; |
44df75e6 | 686 | } |
bc02af93 | 687 | EXPORT_SYMBOL_GPL(arch_add_memory); |
44df75e6 | 688 | |
8243229f | 689 | #if !defined(CONFIG_ACPI_NUMA) && defined(CONFIG_NUMA) |
4942e998 KM |
690 | int memory_add_physaddr_to_nid(u64 start) |
691 | { | |
692 | return 0; | |
693 | } | |
8c2676a5 | 694 | EXPORT_SYMBOL_GPL(memory_add_physaddr_to_nid); |
4942e998 KM |
695 | #endif |
696 | ||
45e0b78b KM |
697 | #endif /* CONFIG_MEMORY_HOTPLUG */ |
698 | ||
ae531c26 AV |
699 | /* |
700 | * devmem_is_allowed() checks to see if /dev/mem access to a certain address | |
701 | * is valid. The argument is a physical page number. | |
702 | * | |
703 | * | |
704 | * On x86, access has to be given to the first megabyte of ram because that area | |
705 | * contains bios code and data regions used by X and dosemu and similar apps. | |
706 | * Access has to be given to non-kernel-ram areas as well, these contain the PCI | |
707 | * mmio resources as well as potential bios/acpi data regions. | |
708 | */ | |
709 | int devmem_is_allowed(unsigned long pagenr) | |
710 | { | |
711 | if (pagenr <= 256) | |
712 | return 1; | |
713 | if (!page_is_ram(pagenr)) | |
714 | return 1; | |
715 | return 0; | |
716 | } | |
717 | ||
718 | ||
14a62c34 TG |
719 | static struct kcore_list kcore_mem, kcore_vmalloc, kcore_kernel, |
720 | kcore_modules, kcore_vsyscall; | |
1da177e4 LT |
721 | |
722 | void __init mem_init(void) | |
723 | { | |
0a43e4bf | 724 | long codesize, reservedpages, datasize, initsize; |
1da177e4 | 725 | |
0dc243ae | 726 | pci_iommu_alloc(); |
1da177e4 | 727 | |
48ddb154 | 728 | /* clear_bss() already clear the empty_zero_page */ |
1da177e4 LT |
729 | |
730 | reservedpages = 0; | |
731 | ||
732 | /* this will put all low memory onto the freelists */ | |
2b97690f | 733 | #ifdef CONFIG_NUMA |
0a43e4bf | 734 | totalram_pages = numa_free_all_bootmem(); |
1da177e4 | 735 | #else |
0a43e4bf | 736 | totalram_pages = free_all_bootmem(); |
1da177e4 | 737 | #endif |
c987d12f YL |
738 | reservedpages = max_pfn - totalram_pages - |
739 | absent_pages_in_range(0, max_pfn); | |
1da177e4 LT |
740 | after_bootmem = 1; |
741 | ||
742 | codesize = (unsigned long) &_etext - (unsigned long) &_text; | |
743 | datasize = (unsigned long) &_edata - (unsigned long) &_etext; | |
744 | initsize = (unsigned long) &__init_end - (unsigned long) &__init_begin; | |
745 | ||
746 | /* Register memory areas for /proc/kcore */ | |
14a62c34 TG |
747 | kclist_add(&kcore_mem, __va(0), max_low_pfn << PAGE_SHIFT); |
748 | kclist_add(&kcore_vmalloc, (void *)VMALLOC_START, | |
1da177e4 LT |
749 | VMALLOC_END-VMALLOC_START); |
750 | kclist_add(&kcore_kernel, &_stext, _end - _stext); | |
751 | kclist_add(&kcore_modules, (void *)MODULES_VADDR, MODULES_LEN); | |
14a62c34 | 752 | kclist_add(&kcore_vsyscall, (void *)VSYSCALL_START, |
1da177e4 LT |
753 | VSYSCALL_END - VSYSCALL_START); |
754 | ||
10f22dde | 755 | printk(KERN_INFO "Memory: %luk/%luk available (%ldk kernel code, " |
14a62c34 | 756 | "%ldk reserved, %ldk data, %ldk init)\n", |
1da177e4 | 757 | (unsigned long) nr_free_pages() << (PAGE_SHIFT-10), |
c987d12f | 758 | max_pfn << (PAGE_SHIFT-10), |
1da177e4 LT |
759 | codesize >> 10, |
760 | reservedpages << (PAGE_SHIFT-10), | |
761 | datasize >> 10, | |
762 | initsize >> 10); | |
76ebd054 TG |
763 | |
764 | cpa_init(); | |
1da177e4 LT |
765 | } |
766 | ||
d167a518 | 767 | void free_init_pages(char *what, unsigned long begin, unsigned long end) |
1da177e4 | 768 | { |
bfc734b2 | 769 | unsigned long addr = begin; |
1da177e4 | 770 | |
bfc734b2 | 771 | if (addr >= end) |
d167a518 GH |
772 | return; |
773 | ||
ee01f112 IM |
774 | /* |
775 | * If debugging page accesses then do not free this memory but | |
776 | * mark them not present - any buggy init-section access will | |
777 | * create a kernel page fault: | |
778 | */ | |
779 | #ifdef CONFIG_DEBUG_PAGEALLOC | |
780 | printk(KERN_INFO "debug: unmapping init memory %08lx..%08lx\n", | |
781 | begin, PAGE_ALIGN(end)); | |
782 | set_memory_np(begin, (end - begin) >> PAGE_SHIFT); | |
783 | #else | |
6fb14755 | 784 | printk(KERN_INFO "Freeing %s: %luk freed\n", what, (end - begin) >> 10); |
14a62c34 | 785 | |
bfc734b2 | 786 | for (; addr < end; addr += PAGE_SIZE) { |
e3ebadd9 LT |
787 | ClearPageReserved(virt_to_page(addr)); |
788 | init_page_count(virt_to_page(addr)); | |
789 | memset((void *)(addr & ~(PAGE_SIZE-1)), | |
790 | POISON_FREE_INITMEM, PAGE_SIZE); | |
e3ebadd9 | 791 | free_page(addr); |
1da177e4 LT |
792 | totalram_pages++; |
793 | } | |
ee01f112 | 794 | #endif |
d167a518 GH |
795 | } |
796 | ||
797 | void free_initmem(void) | |
798 | { | |
d167a518 | 799 | free_init_pages("unused kernel memory", |
e3ebadd9 LT |
800 | (unsigned long)(&__init_begin), |
801 | (unsigned long)(&__init_end)); | |
1da177e4 LT |
802 | } |
803 | ||
67df197b | 804 | #ifdef CONFIG_DEBUG_RODATA |
edeed305 AV |
805 | const int rodata_test_data = 0xC3; |
806 | EXPORT_SYMBOL_GPL(rodata_test_data); | |
67df197b | 807 | |
67df197b AV |
808 | void mark_rodata_ro(void) |
809 | { | |
4e4eee0e | 810 | unsigned long start = PFN_ALIGN(_stext), end = PFN_ALIGN(__end_rodata); |
67df197b | 811 | |
6fb14755 | 812 | printk(KERN_INFO "Write protecting the kernel read-only data: %luk\n", |
e3ebadd9 | 813 | (end - start) >> 10); |
984bb80d AV |
814 | set_memory_ro(start, (end - start) >> PAGE_SHIFT); |
815 | ||
816 | /* | |
817 | * The rodata section (but not the kernel text!) should also be | |
818 | * not-executable. | |
819 | */ | |
820 | start = ((unsigned long)__start_rodata + PAGE_SIZE - 1) & PAGE_MASK; | |
821 | set_memory_nx(start, (end - start) >> PAGE_SHIFT); | |
67df197b | 822 | |
1a487252 AV |
823 | rodata_test(); |
824 | ||
0c42f392 | 825 | #ifdef CONFIG_CPA_DEBUG |
10f22dde | 826 | printk(KERN_INFO "Testing CPA: undo %lx-%lx\n", start, end); |
6d238cc4 | 827 | set_memory_rw(start, (end-start) >> PAGE_SHIFT); |
0c42f392 | 828 | |
10f22dde | 829 | printk(KERN_INFO "Testing CPA: again\n"); |
6d238cc4 | 830 | set_memory_ro(start, (end-start) >> PAGE_SHIFT); |
0c42f392 | 831 | #endif |
67df197b | 832 | } |
4e4eee0e | 833 | |
67df197b AV |
834 | #endif |
835 | ||
1da177e4 LT |
836 | #ifdef CONFIG_BLK_DEV_INITRD |
837 | void free_initrd_mem(unsigned long start, unsigned long end) | |
838 | { | |
e3ebadd9 | 839 | free_init_pages("initrd memory", start, end); |
1da177e4 LT |
840 | } |
841 | #endif | |
842 | ||
d2dbf343 YL |
843 | int __init reserve_bootmem_generic(unsigned long phys, unsigned long len, |
844 | int flags) | |
14a62c34 | 845 | { |
2b97690f | 846 | #ifdef CONFIG_NUMA |
8b3cd09e | 847 | int nid, next_nid; |
6a07a0ed | 848 | int ret; |
5e58a02a AK |
849 | #endif |
850 | unsigned long pfn = phys >> PAGE_SHIFT; | |
14a62c34 | 851 | |
c987d12f | 852 | if (pfn >= max_pfn) { |
14a62c34 TG |
853 | /* |
854 | * This can happen with kdump kernels when accessing | |
855 | * firmware tables: | |
856 | */ | |
67794292 | 857 | if (pfn < max_pfn_mapped) |
8b2ef1d7 | 858 | return -EFAULT; |
14a62c34 | 859 | |
6a07a0ed | 860 | printk(KERN_ERR "reserve_bootmem: illegal reserve %lx %lu\n", |
5e58a02a | 861 | phys, len); |
8b2ef1d7 | 862 | return -EFAULT; |
5e58a02a AK |
863 | } |
864 | ||
865 | /* Should check here against the e820 map to avoid double free */ | |
866 | #ifdef CONFIG_NUMA | |
8b3cd09e YL |
867 | nid = phys_to_nid(phys); |
868 | next_nid = phys_to_nid(phys + len - 1); | |
869 | if (nid == next_nid) | |
8b2ef1d7 | 870 | ret = reserve_bootmem_node(NODE_DATA(nid), phys, len, flags); |
8b3cd09e | 871 | else |
8b2ef1d7 BW |
872 | ret = reserve_bootmem(phys, len, flags); |
873 | ||
874 | if (ret != 0) | |
875 | return ret; | |
876 | ||
14a62c34 | 877 | #else |
72a7fe39 | 878 | reserve_bootmem(phys, len, BOOTMEM_DEFAULT); |
1da177e4 | 879 | #endif |
8b3cd09e | 880 | |
0e0b864e | 881 | if (phys+len <= MAX_DMA_PFN*PAGE_SIZE) { |
e18c6874 | 882 | dma_reserve += len / PAGE_SIZE; |
0e0b864e MG |
883 | set_dma_reserve(dma_reserve); |
884 | } | |
8b2ef1d7 BW |
885 | |
886 | return 0; | |
1da177e4 LT |
887 | } |
888 | ||
14a62c34 TG |
889 | int kern_addr_valid(unsigned long addr) |
890 | { | |
1da177e4 | 891 | unsigned long above = ((long)addr) >> __VIRTUAL_MASK_SHIFT; |
14a62c34 TG |
892 | pgd_t *pgd; |
893 | pud_t *pud; | |
894 | pmd_t *pmd; | |
895 | pte_t *pte; | |
1da177e4 LT |
896 | |
897 | if (above != 0 && above != -1UL) | |
14a62c34 TG |
898 | return 0; |
899 | ||
1da177e4 LT |
900 | pgd = pgd_offset_k(addr); |
901 | if (pgd_none(*pgd)) | |
902 | return 0; | |
903 | ||
904 | pud = pud_offset(pgd, addr); | |
905 | if (pud_none(*pud)) | |
14a62c34 | 906 | return 0; |
1da177e4 LT |
907 | |
908 | pmd = pmd_offset(pud, addr); | |
909 | if (pmd_none(*pmd)) | |
910 | return 0; | |
14a62c34 | 911 | |
1da177e4 LT |
912 | if (pmd_large(*pmd)) |
913 | return pfn_valid(pmd_pfn(*pmd)); | |
914 | ||
915 | pte = pte_offset_kernel(pmd, addr); | |
916 | if (pte_none(*pte)) | |
917 | return 0; | |
14a62c34 | 918 | |
1da177e4 LT |
919 | return pfn_valid(pte_pfn(*pte)); |
920 | } | |
921 | ||
14a62c34 TG |
922 | /* |
923 | * A pseudo VMA to allow ptrace access for the vsyscall page. This only | |
924 | * covers the 64bit vsyscall page now. 32bit has a real VMA now and does | |
925 | * not need special handling anymore: | |
926 | */ | |
1da177e4 | 927 | static struct vm_area_struct gate_vma = { |
14a62c34 TG |
928 | .vm_start = VSYSCALL_START, |
929 | .vm_end = VSYSCALL_START + (VSYSCALL_MAPPED_PAGES * PAGE_SIZE), | |
930 | .vm_page_prot = PAGE_READONLY_EXEC, | |
931 | .vm_flags = VM_READ | VM_EXEC | |
1da177e4 LT |
932 | }; |
933 | ||
1da177e4 LT |
934 | struct vm_area_struct *get_gate_vma(struct task_struct *tsk) |
935 | { | |
936 | #ifdef CONFIG_IA32_EMULATION | |
1e014410 AK |
937 | if (test_tsk_thread_flag(tsk, TIF_IA32)) |
938 | return NULL; | |
1da177e4 LT |
939 | #endif |
940 | return &gate_vma; | |
941 | } | |
942 | ||
943 | int in_gate_area(struct task_struct *task, unsigned long addr) | |
944 | { | |
945 | struct vm_area_struct *vma = get_gate_vma(task); | |
14a62c34 | 946 | |
1e014410 AK |
947 | if (!vma) |
948 | return 0; | |
14a62c34 | 949 | |
1da177e4 LT |
950 | return (addr >= vma->vm_start) && (addr < vma->vm_end); |
951 | } | |
952 | ||
14a62c34 TG |
953 | /* |
954 | * Use this when you have no reliable task/vma, typically from interrupt | |
955 | * context. It is less reliable than using the task's vma and may give | |
956 | * false positives: | |
1da177e4 LT |
957 | */ |
958 | int in_gate_area_no_task(unsigned long addr) | |
959 | { | |
1e014410 | 960 | return (addr >= VSYSCALL_START) && (addr < VSYSCALL_END); |
1da177e4 | 961 | } |
2e1c49db | 962 | |
2aae950b AK |
963 | const char *arch_vma_name(struct vm_area_struct *vma) |
964 | { | |
965 | if (vma->vm_mm && vma->vm_start == (long)vma->vm_mm->context.vdso) | |
966 | return "[vdso]"; | |
967 | if (vma == &gate_vma) | |
968 | return "[vsyscall]"; | |
969 | return NULL; | |
970 | } | |
0889eba5 CL |
971 | |
972 | #ifdef CONFIG_SPARSEMEM_VMEMMAP | |
973 | /* | |
974 | * Initialise the sparsemem vmemmap using huge-pages at the PMD level. | |
975 | */ | |
c2b91e2e YL |
976 | static long __meminitdata addr_start, addr_end; |
977 | static void __meminitdata *p_start, *p_end; | |
978 | static int __meminitdata node_start; | |
979 | ||
14a62c34 TG |
980 | int __meminit |
981 | vmemmap_populate(struct page *start_page, unsigned long size, int node) | |
0889eba5 CL |
982 | { |
983 | unsigned long addr = (unsigned long)start_page; | |
984 | unsigned long end = (unsigned long)(start_page + size); | |
985 | unsigned long next; | |
986 | pgd_t *pgd; | |
987 | pud_t *pud; | |
988 | pmd_t *pmd; | |
989 | ||
990 | for (; addr < end; addr = next) { | |
7c934d39 | 991 | void *p = NULL; |
0889eba5 CL |
992 | |
993 | pgd = vmemmap_pgd_populate(addr, node); | |
994 | if (!pgd) | |
995 | return -ENOMEM; | |
14a62c34 | 996 | |
0889eba5 CL |
997 | pud = vmemmap_pud_populate(pgd, addr, node); |
998 | if (!pud) | |
999 | return -ENOMEM; | |
1000 | ||
7c934d39 JF |
1001 | if (!cpu_has_pse) { |
1002 | next = (addr + PAGE_SIZE) & PAGE_MASK; | |
1003 | pmd = vmemmap_pmd_populate(pud, addr, node); | |
1004 | ||
1005 | if (!pmd) | |
1006 | return -ENOMEM; | |
1007 | ||
1008 | p = vmemmap_pte_populate(pmd, addr, node); | |
14a62c34 | 1009 | |
0889eba5 CL |
1010 | if (!p) |
1011 | return -ENOMEM; | |
1012 | ||
7c934d39 JF |
1013 | addr_end = addr + PAGE_SIZE; |
1014 | p_end = p + PAGE_SIZE; | |
14a62c34 | 1015 | } else { |
7c934d39 JF |
1016 | next = pmd_addr_end(addr, end); |
1017 | ||
1018 | pmd = pmd_offset(pud, addr); | |
1019 | if (pmd_none(*pmd)) { | |
1020 | pte_t entry; | |
1021 | ||
1022 | p = vmemmap_alloc_block(PMD_SIZE, node); | |
1023 | if (!p) | |
1024 | return -ENOMEM; | |
1025 | ||
1026 | entry = pfn_pte(__pa(p) >> PAGE_SHIFT, | |
1027 | PAGE_KERNEL_LARGE); | |
1028 | set_pmd(pmd, __pmd(pte_val(entry))); | |
1029 | ||
1030 | addr_end = addr + PMD_SIZE; | |
1031 | p_end = p + PMD_SIZE; | |
1032 | ||
1033 | /* check to see if we have contiguous blocks */ | |
1034 | if (p_end != p || node_start != node) { | |
1035 | if (p_start) | |
1036 | printk(KERN_DEBUG " [%lx-%lx] PMD -> [%p-%p] on node %d\n", | |
1037 | addr_start, addr_end-1, p_start, p_end-1, node_start); | |
1038 | addr_start = addr; | |
1039 | node_start = node; | |
1040 | p_start = p; | |
1041 | } | |
1042 | } else | |
1043 | vmemmap_verify((pte_t *)pmd, node, addr, next); | |
14a62c34 | 1044 | } |
7c934d39 | 1045 | |
0889eba5 | 1046 | } |
0889eba5 CL |
1047 | return 0; |
1048 | } | |
c2b91e2e YL |
1049 | |
1050 | void __meminit vmemmap_populate_print_last(void) | |
1051 | { | |
1052 | if (p_start) { | |
1053 | printk(KERN_DEBUG " [%lx-%lx] PMD -> [%p-%p] on node %d\n", | |
1054 | addr_start, addr_end-1, p_start, p_end-1, node_start); | |
1055 | p_start = NULL; | |
1056 | p_end = NULL; | |
1057 | node_start = 0; | |
1058 | } | |
1059 | } | |
0889eba5 | 1060 | #endif |