Commit | Line | Data |
---|---|---|
1da177e4 | 1 | /* |
1da177e4 LT |
2 | * Copyright (C) 1995 Linus Torvalds |
3 | * | |
4 | * Support of BIGMEM added by Gerhard Wichert, Siemens AG, July 1999 | |
5 | * | |
6 | * Memory region support | |
7 | * David Parsons <orc@pell.chi.il.us>, July-August 1999 | |
8 | * | |
9 | * Added E820 sanitization routine (removes overlapping memory regions); | |
10 | * Brian Moyle <bmoyle@mvista.com>, February 2001 | |
11 | * | |
12 | * Moved CPU detection code to cpu/${cpu}.c | |
13 | * Patrick Mochel <mochel@osdl.org>, March 2002 | |
14 | * | |
15 | * Provisions for empty E820 memory regions (reported by certain BIOSes). | |
16 | * Alex Achenbach <xela@slit.de>, December 2002. | |
17 | * | |
18 | */ | |
19 | ||
20 | /* | |
21 | * This file handles the architecture-dependent parts of initialization | |
22 | */ | |
23 | ||
24 | #include <linux/sched.h> | |
25 | #include <linux/mm.h> | |
05b79bdc | 26 | #include <linux/mmzone.h> |
894673ee | 27 | #include <linux/screen_info.h> |
1da177e4 LT |
28 | #include <linux/ioport.h> |
29 | #include <linux/acpi.h> | |
30 | #include <linux/apm_bios.h> | |
31 | #include <linux/initrd.h> | |
32 | #include <linux/bootmem.h> | |
33 | #include <linux/seq_file.h> | |
34 | #include <linux/console.h> | |
35 | #include <linux/mca.h> | |
36 | #include <linux/root_dev.h> | |
37 | #include <linux/highmem.h> | |
38 | #include <linux/module.h> | |
39 | #include <linux/efi.h> | |
40 | #include <linux/init.h> | |
41 | #include <linux/edd.h> | |
138fe4e0 | 42 | #include <linux/iscsi_ibft.h> |
1da177e4 | 43 | #include <linux/nodemask.h> |
1bc3b91a | 44 | #include <linux/kexec.h> |
e9928674 | 45 | #include <linux/dmi.h> |
22a9835c | 46 | #include <linux/pfn.h> |
376ff035 | 47 | #include <linux/pci.h> |
46d671b5 | 48 | #include <asm/pci-direct.h> |
f212ec4b | 49 | #include <linux/init_ohci1394_dma.h> |
790c73f6 | 50 | #include <linux/kvm_para.h> |
1bc3b91a | 51 | |
46d671b5 YL |
52 | #include <linux/errno.h> |
53 | #include <linux/kernel.h> | |
54 | #include <linux/stddef.h> | |
55 | #include <linux/unistd.h> | |
56 | #include <linux/ptrace.h> | |
57 | #include <linux/slab.h> | |
58 | #include <linux/user.h> | |
59 | #include <linux/delay.h> | |
46d671b5 YL |
60 | |
61 | #include <linux/kallsyms.h> | |
46d671b5 YL |
62 | #include <linux/cpufreq.h> |
63 | #include <linux/dma-mapping.h> | |
64 | #include <linux/ctype.h> | |
65 | #include <linux/uaccess.h> | |
66 | ||
67 | #include <linux/percpu.h> | |
68 | #include <linux/crash_dump.h> | |
69 | ||
1da177e4 | 70 | #include <video/edid.h> |
1bc3b91a | 71 | |
093af8d7 | 72 | #include <asm/mtrr.h> |
9635b47d | 73 | #include <asm/apic.h> |
1da177e4 LT |
74 | #include <asm/e820.h> |
75 | #include <asm/mpspec.h> | |
76 | #include <asm/setup.h> | |
77 | #include <asm/arch_hooks.h> | |
55f26239 | 78 | #include <asm/efi.h> |
1da177e4 | 79 | #include <asm/sections.h> |
1c6e5503 | 80 | #include <asm/dmi.h> |
1da177e4 LT |
81 | #include <asm/io_apic.h> |
82 | #include <asm/ist.h> | |
7ce0bcfd | 83 | #include <asm/vmi.h> |
e75eac33 | 84 | #include <setup_arch.h> |
ce3fe6b2 | 85 | #include <asm/bios_ebda.h> |
00bf4098 | 86 | #include <asm/cacheflush.h> |
2fde61fd | 87 | #include <asm/processor.h> |
cc9f7a0c | 88 | #include <asm/bugs.h> |
1da177e4 | 89 | |
46d671b5 YL |
90 | #include <asm/system.h> |
91 | #include <asm/vsyscall.h> | |
92 | #include <asm/smp.h> | |
93 | #include <asm/desc.h> | |
94 | #include <asm/dma.h> | |
46a7fa27 | 95 | #include <asm/iommu.h> |
46d671b5 YL |
96 | #include <asm/mmu_context.h> |
97 | #include <asm/proto.h> | |
98 | ||
99 | #include <mach_apic.h> | |
46d671b5 | 100 | #include <asm/paravirt.h> |
46d671b5 YL |
101 | |
102 | #include <asm/percpu.h> | |
46d671b5 YL |
103 | #include <asm/topology.h> |
104 | #include <asm/apicdef.h> | |
55f26239 YL |
105 | #ifdef CONFIG_X86_64 |
106 | #include <asm/numa_64.h> | |
107 | #endif | |
46d671b5 | 108 | |
042623bb YL |
109 | #ifndef ARCH_SETUP |
110 | #define ARCH_SETUP | |
111 | #endif | |
112 | ||
217b8ce8 YL |
113 | #ifndef CONFIG_DEBUG_BOOT_PARAMS |
114 | struct boot_params __initdata boot_params; | |
115 | #else | |
116 | struct boot_params boot_params; | |
117 | #endif | |
118 | ||
1da177e4 LT |
119 | /* |
120 | * Machine setup.. | |
121 | */ | |
c9cce83d BW |
122 | static struct resource data_resource = { |
123 | .name = "Kernel data", | |
124 | .start = 0, | |
125 | .end = 0, | |
126 | .flags = IORESOURCE_BUSY | IORESOURCE_MEM | |
127 | }; | |
128 | ||
129 | static struct resource code_resource = { | |
130 | .name = "Kernel code", | |
131 | .start = 0, | |
132 | .end = 0, | |
133 | .flags = IORESOURCE_BUSY | IORESOURCE_MEM | |
134 | }; | |
135 | ||
136 | static struct resource bss_resource = { | |
137 | .name = "Kernel bss", | |
138 | .start = 0, | |
139 | .end = 0, | |
140 | .flags = IORESOURCE_BUSY | IORESOURCE_MEM | |
141 | }; | |
142 | ||
7dea23ec YL |
143 | |
144 | #ifdef CONFIG_X86_32 | |
5092301c YL |
145 | /* This value is set up by the early boot code to point to the value |
146 | immediately after the boot time page tables. It contains a *physical* | |
147 | address, and must not be in the .bss segment! */ | |
148 | unsigned long init_pg_tables_start __initdata = ~0UL; | |
149 | unsigned long init_pg_tables_end __initdata = ~0UL; | |
150 | ||
c9cce83d BW |
151 | static struct resource video_ram_resource = { |
152 | .name = "Video RAM area", | |
153 | .start = 0xa0000, | |
154 | .end = 0xbffff, | |
155 | .flags = IORESOURCE_BUSY | IORESOURCE_MEM | |
156 | }; | |
157 | ||
1da177e4 | 158 | /* cpu data as detected by the assembly code in head.S */ |
7dea23ec | 159 | struct cpuinfo_x86 new_cpu_data __cpuinitdata = {0, 0, 0, 0, -1, 1, 0, 0, -1}; |
1da177e4 | 160 | /* common cpu data for all cpus */ |
7dea23ec | 161 | struct cpuinfo_x86 boot_cpu_data __read_mostly = {0, 0, 0, 0, -1, 1, 0, 0, -1}; |
129f6946 | 162 | EXPORT_SYMBOL(boot_cpu_data); |
7dea23ec YL |
163 | static void set_mca_bus(int x) |
164 | { | |
165 | #ifdef CONFIG_MCA | |
166 | MCA_bus = x; | |
167 | #endif | |
168 | } | |
1da177e4 | 169 | |
0c254e38 AS |
170 | unsigned int def_to_bigsmp; |
171 | ||
1da177e4 LT |
172 | /* for MCA, but anyone else can use it if they want */ |
173 | unsigned int machine_id; | |
174 | unsigned int machine_submodel_id; | |
175 | unsigned int BIOS_revision; | |
1da177e4 | 176 | |
7dea23ec YL |
177 | struct apm_info apm_info; |
178 | EXPORT_SYMBOL(apm_info); | |
179 | ||
180 | #if defined(CONFIG_X86_SPEEDSTEP_SMI) || \ | |
181 | defined(CONFIG_X86_SPEEDSTEP_SMI_MODULE) | |
182 | struct ist_info ist_info; | |
183 | EXPORT_SYMBOL(ist_info); | |
184 | #else | |
185 | struct ist_info ist_info; | |
186 | #endif | |
187 | ||
188 | #else | |
189 | struct cpuinfo_x86 boot_cpu_data __read_mostly; | |
190 | EXPORT_SYMBOL(boot_cpu_data); | |
191 | #endif | |
192 | ||
193 | ||
194 | #if !defined(CONFIG_X86_PAE) || defined(CONFIG_X86_64) | |
195 | unsigned long mmu_cr4_features; | |
196 | #else | |
197 | unsigned long mmu_cr4_features = X86_CR4_PAE; | |
198 | #endif | |
199 | ||
1da177e4 LT |
200 | /* Boot loader ID as an integer, for the benefit of proc_dointvec */ |
201 | int bootloader_type; | |
202 | ||
1c6e5503 YL |
203 | /* |
204 | * Early DMI memory | |
205 | */ | |
206 | int dmi_alloc_index; | |
207 | char dmi_alloc_data[DMI_MAX_DATA]; | |
208 | ||
1da177e4 LT |
209 | /* |
210 | * Setup options | |
211 | */ | |
1da177e4 | 212 | struct screen_info screen_info; |
129f6946 | 213 | EXPORT_SYMBOL(screen_info); |
1da177e4 | 214 | struct edid_info edid_info; |
5e518d76 | 215 | EXPORT_SYMBOL_GPL(edid_info); |
1da177e4 | 216 | |
1da177e4 LT |
217 | extern int root_mountflags; |
218 | ||
e44b7b75 | 219 | unsigned long saved_video_mode; |
1da177e4 | 220 | |
cf8fa920 | 221 | #define RAMDISK_IMAGE_START_MASK 0x07FF |
1da177e4 | 222 | #define RAMDISK_PROMPT_FLAG 0x8000 |
cf8fa920 | 223 | #define RAMDISK_LOAD_FLAG 0x4000 |
1da177e4 | 224 | |
4e498b66 | 225 | static char __initdata command_line[COMMAND_LINE_SIZE]; |
1da177e4 | 226 | |
1da177e4 LT |
227 | #if defined(CONFIG_EDD) || defined(CONFIG_EDD_MODULE) |
228 | struct edd edd; | |
229 | #ifdef CONFIG_EDD_MODULE | |
230 | EXPORT_SYMBOL(edd); | |
231 | #endif | |
232 | /** | |
233 | * copy_edd() - Copy the BIOS EDD information | |
234 | * from boot_params into a safe place. | |
235 | * | |
236 | */ | |
237 | static inline void copy_edd(void) | |
238 | { | |
30c82645 PA |
239 | memcpy(edd.mbr_signature, boot_params.edd_mbr_sig_buffer, |
240 | sizeof(edd.mbr_signature)); | |
241 | memcpy(edd.edd_info, boot_params.eddbuf, sizeof(edd.edd_info)); | |
242 | edd.mbr_signature_nr = boot_params.edd_mbr_sig_buf_entries; | |
243 | edd.edd_info_nr = boot_params.eddbuf_entries; | |
1da177e4 LT |
244 | } |
245 | #else | |
246 | static inline void copy_edd(void) | |
247 | { | |
248 | } | |
249 | #endif | |
250 | ||
cf8fa920 PA |
251 | #ifdef CONFIG_BLK_DEV_INITRD |
252 | ||
eb1379cb | 253 | #ifdef CONFIG_X86_32 |
cf8fa920 | 254 | |
eb1379cb YL |
255 | #define MAX_MAP_CHUNK (NR_FIX_BTMAPS << PAGE_SHIFT) |
256 | static void __init relocate_initrd(void) | |
cf8fa920 | 257 | { |
eb1379cb | 258 | |
ba5b14cc YL |
259 | u64 ramdisk_image = boot_params.hdr.ramdisk_image; |
260 | u64 ramdisk_size = boot_params.hdr.ramdisk_size; | |
ba5b14cc YL |
261 | u64 end_of_lowmem = max_low_pfn << PAGE_SHIFT; |
262 | u64 ramdisk_here; | |
eb1379cb YL |
263 | unsigned long slop, clen, mapaddr; |
264 | char *p, *q; | |
cf8fa920 PA |
265 | |
266 | /* We need to move the initrd down into lowmem */ | |
4e29684c YL |
267 | ramdisk_here = find_e820_area(0, end_of_lowmem, ramdisk_size, |
268 | PAGE_SIZE); | |
cf8fa920 | 269 | |
3945e2c9 YL |
270 | if (ramdisk_here == -1ULL) |
271 | panic("Cannot find place for new RAMDISK of size %lld\n", | |
272 | ramdisk_size); | |
273 | ||
cf8fa920 PA |
274 | /* Note: this includes all the lowmem currently occupied by |
275 | the initrd, we rely on that fact to keep the data intact. */ | |
3945e2c9 | 276 | reserve_early(ramdisk_here, ramdisk_here + ramdisk_size, |
ba5b14cc | 277 | "NEW RAMDISK"); |
cf8fa920 PA |
278 | initrd_start = ramdisk_here + PAGE_OFFSET; |
279 | initrd_end = initrd_start + ramdisk_size; | |
f0d43100 YL |
280 | printk(KERN_INFO "Allocated new RAMDISK: %08llx - %08llx\n", |
281 | ramdisk_here, ramdisk_here + ramdisk_size); | |
cf8fa920 | 282 | |
cf8fa920 PA |
283 | q = (char *)initrd_start; |
284 | ||
285 | /* Copy any lowmem portion of the initrd */ | |
286 | if (ramdisk_image < end_of_lowmem) { | |
287 | clen = end_of_lowmem - ramdisk_image; | |
288 | p = (char *)__va(ramdisk_image); | |
289 | memcpy(q, p, clen); | |
290 | q += clen; | |
291 | ramdisk_image += clen; | |
292 | ramdisk_size -= clen; | |
293 | } | |
294 | ||
295 | /* Copy the highmem portion of the initrd */ | |
296 | while (ramdisk_size) { | |
297 | slop = ramdisk_image & ~PAGE_MASK; | |
298 | clen = ramdisk_size; | |
299 | if (clen > MAX_MAP_CHUNK-slop) | |
300 | clen = MAX_MAP_CHUNK-slop; | |
301 | mapaddr = ramdisk_image & PAGE_MASK; | |
beacfaac | 302 | p = early_ioremap(mapaddr, clen+slop); |
cf8fa920 | 303 | memcpy(q, p+slop, clen); |
beacfaac | 304 | early_iounmap(p, clen+slop); |
cf8fa920 PA |
305 | q += clen; |
306 | ramdisk_image += clen; | |
307 | ramdisk_size -= clen; | |
308 | } | |
a4c81cf6 | 309 | /* high pages is not converted by early_res_to_bootmem */ |
ba5b14cc YL |
310 | ramdisk_image = boot_params.hdr.ramdisk_image; |
311 | ramdisk_size = boot_params.hdr.ramdisk_size; | |
eb1379cb YL |
312 | printk(KERN_INFO "Move RAMDISK from %016llx - %016llx to" |
313 | " %08llx - %08llx\n", | |
ba5b14cc YL |
314 | ramdisk_image, ramdisk_image + ramdisk_size - 1, |
315 | ramdisk_here, ramdisk_here + ramdisk_size - 1); | |
eb1379cb YL |
316 | } |
317 | #endif | |
9a27f5c5 | 318 | |
eb1379cb YL |
319 | static void __init reserve_initrd(void) |
320 | { | |
321 | u64 ramdisk_image = boot_params.hdr.ramdisk_image; | |
322 | u64 ramdisk_size = boot_params.hdr.ramdisk_size; | |
323 | u64 ramdisk_end = ramdisk_image + ramdisk_size; | |
324 | u64 end_of_lowmem = max_low_pfn << PAGE_SHIFT; | |
325 | ||
326 | if (!boot_params.hdr.type_of_loader || | |
327 | !ramdisk_image || !ramdisk_size) | |
328 | return; /* No initrd provided by bootloader */ | |
329 | ||
330 | initrd_start = 0; | |
331 | ||
332 | if (ramdisk_size >= (end_of_lowmem>>1)) { | |
333 | free_early(ramdisk_image, ramdisk_end); | |
334 | printk(KERN_ERR "initrd too large to handle, " | |
335 | "disabling initrd\n"); | |
336 | return; | |
337 | } | |
338 | ||
339 | printk(KERN_INFO "RAMDISK: %08llx - %08llx\n", ramdisk_image, | |
340 | ramdisk_end); | |
341 | ||
342 | ||
343 | if (ramdisk_end <= end_of_lowmem) { | |
344 | /* All in lowmem, easy case */ | |
345 | /* | |
346 | * don't need to reserve again, already reserved early | |
347 | * in i386_start_kernel | |
348 | */ | |
349 | initrd_start = ramdisk_image + PAGE_OFFSET; | |
350 | initrd_end = initrd_start + ramdisk_size; | |
351 | return; | |
352 | } | |
353 | ||
354 | #ifdef CONFIG_X86_32 | |
355 | relocate_initrd(); | |
356 | #else | |
357 | printk(KERN_ERR "initrd extends beyond end of memory " | |
358 | "(0x%08llx > 0x%08llx)\ndisabling initrd\n", | |
359 | ramdisk_end, end_of_lowmem); | |
360 | initrd_start = 0; | |
361 | #endif | |
362 | free_early(ramdisk_image, ramdisk_end); | |
cf8fa920 | 363 | } |
225c37d7 | 364 | #else |
eb1379cb | 365 | static void __init reserve_initrd(void) |
225c37d7 YL |
366 | { |
367 | } | |
cf8fa920 PA |
368 | #endif /* CONFIG_BLK_DEV_INITRD */ |
369 | ||
29f784e3 | 370 | static void __init parse_setup_data(void) |
257b0fde YL |
371 | { |
372 | struct setup_data *data; | |
373 | u64 pa_data; | |
374 | ||
375 | if (boot_params.hdr.version < 0x0209) | |
376 | return; | |
377 | pa_data = boot_params.hdr.setup_data; | |
378 | while (pa_data) { | |
379 | data = early_ioremap(pa_data, PAGE_SIZE); | |
380 | switch (data->type) { | |
381 | case SETUP_E820_EXT: | |
382 | parse_e820_ext(data, pa_data); | |
383 | break; | |
384 | default: | |
385 | break; | |
386 | } | |
257b0fde YL |
387 | pa_data = data->next; |
388 | early_iounmap(data, PAGE_SIZE); | |
389 | } | |
390 | } | |
391 | ||
a0a0becd | 392 | static void __init e820_reserve_setup_data(void) |
28bb2237 YL |
393 | { |
394 | struct setup_data *data; | |
395 | u64 pa_data; | |
d9a81b44 | 396 | int found = 0; |
28bb2237 YL |
397 | |
398 | if (boot_params.hdr.version < 0x0209) | |
399 | return; | |
400 | pa_data = boot_params.hdr.setup_data; | |
401 | while (pa_data) { | |
402 | data = early_ioremap(pa_data, sizeof(*data)); | |
28bb2237 YL |
403 | e820_update_range(pa_data, sizeof(*data)+data->len, |
404 | E820_RAM, E820_RESERVED_KERN); | |
d9a81b44 | 405 | found = 1; |
28bb2237 YL |
406 | pa_data = data->next; |
407 | early_iounmap(data, sizeof(*data)); | |
408 | } | |
d9a81b44 YL |
409 | if (!found) |
410 | return; | |
411 | ||
28bb2237 | 412 | sanitize_e820_map(e820.map, ARRAY_SIZE(e820.map), &e820.nr_map); |
a0a0becd | 413 | memcpy(&e820_saved, &e820, sizeof(struct e820map)); |
28bb2237 YL |
414 | printk(KERN_INFO "extended physical RAM map:\n"); |
415 | e820_print_map("reserve setup_data"); | |
416 | } | |
417 | ||
a0a0becd YL |
418 | static void __init reserve_early_setup_data(void) |
419 | { | |
420 | struct setup_data *data; | |
421 | u64 pa_data; | |
422 | char buf[32]; | |
423 | ||
424 | if (boot_params.hdr.version < 0x0209) | |
425 | return; | |
426 | pa_data = boot_params.hdr.setup_data; | |
427 | while (pa_data) { | |
428 | data = early_ioremap(pa_data, sizeof(*data)); | |
429 | sprintf(buf, "setup data %x", data->type); | |
430 | reserve_early(pa_data, pa_data+sizeof(*data)+data->len, buf); | |
431 | pa_data = data->next; | |
432 | early_iounmap(data, sizeof(*data)); | |
433 | } | |
434 | } | |
435 | ||
ccb4defa YL |
436 | /* |
437 | * --------- Crashkernel reservation ------------------------------ | |
438 | */ | |
439 | ||
440 | #ifdef CONFIG_KEXEC | |
32105f7f BW |
441 | |
442 | /** | |
443 | * Reserve @size bytes of crashkernel memory at any suitable offset. | |
444 | * | |
445 | * @size: Size of the crashkernel memory to reserve. | |
446 | * Returns the base address on success, and -1ULL on failure. | |
447 | */ | |
6b356022 | 448 | unsigned long long __init find_and_reserve_crashkernel(unsigned long long size) |
32105f7f BW |
449 | { |
450 | const unsigned long long alignment = 16<<20; /* 16M */ | |
451 | unsigned long long start = 0LL; | |
452 | ||
453 | while (1) { | |
454 | int ret; | |
455 | ||
456 | start = find_e820_area(start, ULONG_MAX, size, alignment); | |
457 | if (start == -1ULL) | |
458 | return start; | |
459 | ||
460 | /* try to reserve it */ | |
461 | ret = reserve_bootmem_generic(start, size, BOOTMEM_EXCLUSIVE); | |
462 | if (ret >= 0) | |
463 | return start; | |
464 | ||
465 | start += alignment; | |
466 | } | |
467 | } | |
468 | ||
ccb4defa YL |
469 | static inline unsigned long long get_total_mem(void) |
470 | { | |
471 | unsigned long long total; | |
472 | ||
473 | total = max_low_pfn - min_low_pfn; | |
474 | #ifdef CONFIG_HIGHMEM | |
475 | total += highend_pfn - highstart_pfn; | |
476 | #endif | |
477 | ||
478 | return total << PAGE_SHIFT; | |
479 | } | |
480 | ||
29f784e3 | 481 | static void __init reserve_crashkernel(void) |
ccb4defa YL |
482 | { |
483 | unsigned long long total_mem; | |
484 | unsigned long long crash_size, crash_base; | |
485 | int ret; | |
486 | ||
487 | total_mem = get_total_mem(); | |
488 | ||
489 | ret = parse_crashkernel(boot_command_line, total_mem, | |
490 | &crash_size, &crash_base); | |
32105f7f BW |
491 | if (ret != 0 || crash_size <= 0) |
492 | return; | |
493 | ||
494 | /* 0 means: find the address automatically */ | |
495 | if (crash_base <= 0) { | |
496 | crash_base = find_and_reserve_crashkernel(crash_size); | |
497 | if (crash_base == -1ULL) { | |
498 | pr_info("crashkernel reservation failed. " | |
499 | "No suitable area found.\n"); | |
ccb4defa YL |
500 | return; |
501 | } | |
32105f7f BW |
502 | } else { |
503 | ret = reserve_bootmem_generic(crash_base, crash_size, | |
504 | BOOTMEM_EXCLUSIVE); | |
505 | if (ret < 0) { | |
506 | pr_info("crashkernel reservation failed - " | |
507 | "memory is in use\n"); | |
ccb4defa YL |
508 | return; |
509 | } | |
32105f7f | 510 | } |
ccb4defa | 511 | |
32105f7f BW |
512 | printk(KERN_INFO "Reserving %ldMB of memory at %ldMB " |
513 | "for crashkernel (System RAM: %ldMB)\n", | |
514 | (unsigned long)(crash_size >> 20), | |
515 | (unsigned long)(crash_base >> 20), | |
516 | (unsigned long)(total_mem >> 20)); | |
ccb4defa | 517 | |
32105f7f BW |
518 | crashk_res.start = crash_base; |
519 | crashk_res.end = crash_base + crash_size - 1; | |
520 | insert_resource(&iomem_resource, &crashk_res); | |
ccb4defa YL |
521 | } |
522 | #else | |
29f784e3 | 523 | static void __init reserve_crashkernel(void) |
ccb4defa YL |
524 | { |
525 | } | |
526 | #endif | |
527 | ||
bdba0e70 YL |
528 | static struct resource standard_io_resources[] = { |
529 | { .name = "dma1", .start = 0x00, .end = 0x1f, | |
530 | .flags = IORESOURCE_BUSY | IORESOURCE_IO }, | |
531 | { .name = "pic1", .start = 0x20, .end = 0x21, | |
532 | .flags = IORESOURCE_BUSY | IORESOURCE_IO }, | |
533 | { .name = "timer0", .start = 0x40, .end = 0x43, | |
534 | .flags = IORESOURCE_BUSY | IORESOURCE_IO }, | |
535 | { .name = "timer1", .start = 0x50, .end = 0x53, | |
536 | .flags = IORESOURCE_BUSY | IORESOURCE_IO }, | |
537 | { .name = "keyboard", .start = 0x60, .end = 0x60, | |
538 | .flags = IORESOURCE_BUSY | IORESOURCE_IO }, | |
539 | { .name = "keyboard", .start = 0x64, .end = 0x64, | |
540 | .flags = IORESOURCE_BUSY | IORESOURCE_IO }, | |
541 | { .name = "dma page reg", .start = 0x80, .end = 0x8f, | |
542 | .flags = IORESOURCE_BUSY | IORESOURCE_IO }, | |
543 | { .name = "pic2", .start = 0xa0, .end = 0xa1, | |
544 | .flags = IORESOURCE_BUSY | IORESOURCE_IO }, | |
545 | { .name = "dma2", .start = 0xc0, .end = 0xdf, | |
546 | .flags = IORESOURCE_BUSY | IORESOURCE_IO }, | |
547 | { .name = "fpu", .start = 0xf0, .end = 0xff, | |
548 | .flags = IORESOURCE_BUSY | IORESOURCE_IO } | |
549 | }; | |
550 | ||
29f784e3 | 551 | static void __init reserve_standard_io_resources(void) |
bdba0e70 YL |
552 | { |
553 | int i; | |
554 | ||
555 | /* request I/O space for devices used on all i[345]86 PCs */ | |
556 | for (i = 0; i < ARRAY_SIZE(standard_io_resources); i++) | |
557 | request_resource(&ioport_resource, &standard_io_resources[i]); | |
558 | ||
559 | } | |
560 | ||
0196bcbb YL |
561 | #ifdef CONFIG_PROC_VMCORE |
562 | /* elfcorehdr= specifies the location of elf core header | |
563 | * stored by the crashed kernel. This option will be passed | |
564 | * by kexec loader to the capture kernel. | |
565 | */ | |
566 | static int __init setup_elfcorehdr(char *arg) | |
567 | { | |
568 | char *end; | |
569 | if (!arg) | |
570 | return -EINVAL; | |
571 | elfcorehdr_addr = memparse(arg, &end); | |
572 | return end > arg ? 0 : -EINVAL; | |
573 | } | |
574 | early_param("elfcorehdr", setup_elfcorehdr); | |
575 | #endif | |
576 | ||
3c9cb6de YL |
577 | static struct x86_quirks default_x86_quirks __initdata; |
578 | ||
579 | struct x86_quirks *x86_quirks __initdata = &default_x86_quirks; | |
580 | ||
5394f80f JF |
581 | /* |
582 | * Some BIOSes seem to corrupt the low 64k of memory during events | |
583 | * like suspend/resume and unplugging an HDMI cable. Reserve all | |
584 | * remaining free memory in that area and fill it with a distinct | |
585 | * pattern. | |
586 | */ | |
587 | #ifdef CONFIG_X86_CHECK_BIOS_CORRUPTION | |
588 | #define MAX_SCAN_AREAS 8 | |
9f077871 JF |
589 | |
590 | static int __read_mostly memory_corruption_check = 0; | |
591 | static unsigned __read_mostly corruption_check_size = 64*1024; | |
592 | static unsigned __read_mostly corruption_check_period = 60; /* seconds */ | |
593 | ||
5394f80f JF |
594 | static struct e820entry scan_areas[MAX_SCAN_AREAS]; |
595 | static int num_scan_areas; | |
596 | ||
9f077871 JF |
597 | |
598 | static int set_corruption_check(char *arg) | |
599 | { | |
600 | char *end; | |
601 | ||
602 | memory_corruption_check = simple_strtol(arg, &end, 10); | |
603 | ||
604 | return (*end == 0) ? 0 : -EINVAL; | |
605 | } | |
606 | early_param("memory_corruption_check", set_corruption_check); | |
607 | ||
608 | static int set_corruption_check_period(char *arg) | |
609 | { | |
610 | char *end; | |
611 | ||
612 | corruption_check_period = simple_strtoul(arg, &end, 10); | |
613 | ||
614 | return (*end == 0) ? 0 : -EINVAL; | |
615 | } | |
616 | early_param("memory_corruption_check_period", set_corruption_check_period); | |
617 | ||
618 | static int set_corruption_check_size(char *arg) | |
619 | { | |
620 | char *end; | |
621 | unsigned size; | |
622 | ||
623 | size = memparse(arg, &end); | |
624 | ||
625 | if (*end == '\0') | |
626 | corruption_check_size = size; | |
627 | ||
628 | return (size == corruption_check_size) ? 0 : -EINVAL; | |
629 | } | |
630 | early_param("memory_corruption_check_size", set_corruption_check_size); | |
631 | ||
632 | ||
5394f80f JF |
633 | static void __init setup_bios_corruption_check(void) |
634 | { | |
635 | u64 addr = PAGE_SIZE; /* assume first page is reserved anyway */ | |
636 | ||
9f077871 JF |
637 | if (corruption_check_size == 0) |
638 | memory_corruption_check = 0; | |
639 | ||
640 | if (!memory_corruption_check) | |
641 | return; | |
642 | ||
643 | corruption_check_size = round_up(corruption_check_size, PAGE_SIZE); | |
644 | ||
645 | while(addr < corruption_check_size && num_scan_areas < MAX_SCAN_AREAS) { | |
5394f80f JF |
646 | u64 size; |
647 | addr = find_e820_area_size(addr, &size, PAGE_SIZE); | |
648 | ||
649 | if (addr == 0) | |
650 | break; | |
651 | ||
9f077871 JF |
652 | if ((addr + size) > corruption_check_size) |
653 | size = corruption_check_size - addr; | |
5394f80f JF |
654 | |
655 | if (size == 0) | |
656 | break; | |
657 | ||
658 | e820_update_range(addr, size, E820_RAM, E820_RESERVED); | |
659 | scan_areas[num_scan_areas].addr = addr; | |
660 | scan_areas[num_scan_areas].size = size; | |
661 | num_scan_areas++; | |
662 | ||
663 | /* Assume we've already mapped this early memory */ | |
664 | memset(__va(addr), 0, size); | |
665 | ||
666 | addr += size; | |
667 | } | |
668 | ||
9f077871 | 669 | printk(KERN_INFO "Scanning %d areas for low memory corruption\n", |
5394f80f JF |
670 | num_scan_areas); |
671 | update_e820(); | |
672 | } | |
673 | ||
bb577f98 | 674 | static struct timer_list periodic_check_timer; |
5394f80f JF |
675 | |
676 | void check_for_bios_corruption(void) | |
677 | { | |
678 | int i; | |
679 | int corruption = 0; | |
680 | ||
9f077871 | 681 | if (!memory_corruption_check) |
5394f80f JF |
682 | return; |
683 | ||
684 | for(i = 0; i < num_scan_areas; i++) { | |
685 | unsigned long *addr = __va(scan_areas[i].addr); | |
686 | unsigned long size = scan_areas[i].size; | |
687 | ||
688 | for(; size; addr++, size -= sizeof(unsigned long)) { | |
689 | if (!*addr) | |
690 | continue; | |
691 | printk(KERN_ERR "Corrupted low memory at %p (%lx phys) = %08lx\n", | |
692 | addr, __pa(addr), *addr); | |
693 | corruption = 1; | |
694 | *addr = 0; | |
695 | } | |
696 | } | |
697 | ||
9f077871 | 698 | WARN(corruption, KERN_ERR "Memory corruption detected in low memory\n"); |
5394f80f JF |
699 | } |
700 | ||
bb577f98 HD |
701 | static void periodic_check_for_corruption(unsigned long data) |
702 | { | |
703 | check_for_bios_corruption(); | |
9f077871 | 704 | mod_timer(&periodic_check_timer, jiffies + corruption_check_period*HZ); |
bb577f98 HD |
705 | } |
706 | ||
707 | void start_periodic_check_for_corruption(void) | |
708 | { | |
9f077871 | 709 | if (!memory_corruption_check || corruption_check_period == 0) |
bb577f98 HD |
710 | return; |
711 | ||
9f077871 JF |
712 | printk(KERN_INFO "Scanning for low memory corruption every %d seconds\n", |
713 | corruption_check_period); | |
714 | ||
bb577f98 HD |
715 | init_timer(&periodic_check_timer); |
716 | periodic_check_timer.function = &periodic_check_for_corruption; | |
717 | periodic_check_for_corruption(0); | |
718 | } | |
5394f80f JF |
719 | #endif |
720 | ||
1da177e4 LT |
721 | /* |
722 | * Determine if we were loaded by an EFI loader. If so, then we have also been | |
723 | * passed the efi memmap, systab, etc., so we should use these data structures | |
724 | * for initialization. Note, the efi init code path is determined by the | |
725 | * global efi_enabled. This allows the same kernel image to be used on existing | |
726 | * systems (with a traditional BIOS) as well as on EFI systems. | |
727 | */ | |
76934ed4 YL |
728 | /* |
729 | * setup_arch - architecture-specific boot-time initializations | |
730 | * | |
731 | * Note: On x86_64, fixmaps are ready for use even before this is called. | |
732 | */ | |
733 | ||
1da177e4 LT |
734 | void __init setup_arch(char **cmdline_p) |
735 | { | |
76934ed4 | 736 | #ifdef CONFIG_X86_32 |
1da177e4 | 737 | memcpy(&boot_cpu_data, &new_cpu_data, sizeof(new_cpu_data)); |
3b33553b | 738 | visws_early_detect(); |
1da177e4 | 739 | pre_setup_arch_hook(); |
76934ed4 YL |
740 | #else |
741 | printk(KERN_INFO "Command line: %s\n", boot_command_line); | |
742 | #endif | |
1da177e4 | 743 | |
9e882c92 | 744 | early_cpu_init(); |
1a98fd14 JF |
745 | early_ioremap_init(); |
746 | ||
30c82645 PA |
747 | ROOT_DEV = old_decode_dev(boot_params.hdr.root_dev); |
748 | screen_info = boot_params.screen_info; | |
749 | edid_info = boot_params.edid_info; | |
76934ed4 | 750 | #ifdef CONFIG_X86_32 |
30c82645 PA |
751 | apm_info.bios = boot_params.apm_bios_info; |
752 | ist_info = boot_params.ist_info; | |
76934ed4 | 753 | if (boot_params.sys_desc_table.length != 0) { |
30c82645 PA |
754 | set_mca_bus(boot_params.sys_desc_table.table[3] & 0x2); |
755 | machine_id = boot_params.sys_desc_table.table[0]; | |
756 | machine_submodel_id = boot_params.sys_desc_table.table[1]; | |
757 | BIOS_revision = boot_params.sys_desc_table.table[2]; | |
1da177e4 | 758 | } |
76934ed4 YL |
759 | #endif |
760 | saved_video_mode = boot_params.hdr.vid_mode; | |
30c82645 | 761 | bootloader_type = boot_params.hdr.type_of_loader; |
1da177e4 LT |
762 | |
763 | #ifdef CONFIG_BLK_DEV_RAM | |
30c82645 PA |
764 | rd_image_start = boot_params.hdr.ram_size & RAMDISK_IMAGE_START_MASK; |
765 | rd_prompt = ((boot_params.hdr.ram_size & RAMDISK_PROMPT_FLAG) != 0); | |
766 | rd_doload = ((boot_params.hdr.ram_size & RAMDISK_LOAD_FLAG) != 0); | |
1da177e4 | 767 | #endif |
7465252e YL |
768 | #ifdef CONFIG_EFI |
769 | if (!strncmp((char *)&boot_params.efi_info.efi_loader_signature, | |
76934ed4 YL |
770 | #ifdef CONFIG_X86_32 |
771 | "EL32", | |
772 | #else | |
773 | "EL64", | |
774 | #endif | |
775 | 4)) { | |
7465252e YL |
776 | efi_enabled = 1; |
777 | efi_reserve_early(); | |
778 | } | |
779 | #endif | |
780 | ||
1da177e4 | 781 | ARCH_SETUP |
2215e69d | 782 | |
0dbfafa5 | 783 | setup_memory_map(); |
28bb2237 | 784 | parse_setup_data(); |
a0a0becd YL |
785 | /* update the e820_saved too */ |
786 | e820_reserve_setup_data(); | |
28bb2237 | 787 | |
1da177e4 LT |
788 | copy_edd(); |
789 | ||
30c82645 | 790 | if (!boot_params.hdr.root_flags) |
1da177e4 LT |
791 | root_mountflags &= ~MS_RDONLY; |
792 | init_mm.start_code = (unsigned long) _text; | |
793 | init_mm.end_code = (unsigned long) _etext; | |
794 | init_mm.end_data = (unsigned long) _edata; | |
76934ed4 | 795 | #ifdef CONFIG_X86_32 |
1da177e4 | 796 | init_mm.brk = init_pg_tables_end + PAGE_OFFSET; |
76934ed4 YL |
797 | #else |
798 | init_mm.brk = (unsigned long) &_end; | |
799 | #endif | |
1da177e4 LT |
800 | |
801 | code_resource.start = virt_to_phys(_text); | |
802 | code_resource.end = virt_to_phys(_etext)-1; | |
803 | data_resource.start = virt_to_phys(_etext); | |
804 | data_resource.end = virt_to_phys(_edata)-1; | |
00bf4098 BW |
805 | bss_resource.start = virt_to_phys(&__bss_start); |
806 | bss_resource.end = virt_to_phys(&__bss_stop)-1; | |
1da177e4 | 807 | |
9a2e5930 YL |
808 | strlcpy(command_line, boot_command_line, COMMAND_LINE_SIZE); |
809 | *cmdline_p = command_line; | |
810 | ||
1a3f239d | 811 | parse_early_param(); |
1da177e4 | 812 | |
3a6ddd5f AK |
813 | #if defined(CONFIG_VMI) && defined(CONFIG_X86_32) |
814 | /* | |
815 | * Must be before kernel pagetables are setup | |
816 | * or fixmap area is touched. | |
817 | */ | |
818 | vmi_init(); | |
819 | #endif | |
820 | ||
28bb2237 | 821 | /* after early param, so could get panic from serial */ |
a0a0becd | 822 | reserve_early_setup_data(); |
28bb2237 | 823 | |
76934ed4 | 824 | if (acpi_mps_check()) { |
3eb11edc | 825 | #ifdef CONFIG_X86_LOCAL_APIC |
76934ed4 | 826 | disable_apic = 1; |
3eb11edc | 827 | #endif |
988781dc | 828 | setup_clear_cpu_cap(X86_FEATURE_APIC); |
3c999f14 YL |
829 | } |
830 | ||
dc7c65db LT |
831 | #ifdef CONFIG_PCI |
832 | if (pci_early_dump_regs) | |
833 | early_dump_pci_devices(); | |
834 | #endif | |
835 | ||
0dbfafa5 | 836 | finish_e820_parsing(); |
1a3f239d | 837 | |
76934ed4 | 838 | #ifdef CONFIG_X86_32 |
41c094fd | 839 | probe_roms(); |
76934ed4 | 840 | #endif |
41c094fd YL |
841 | |
842 | /* after parse_early_param, so could debug it */ | |
843 | insert_resource(&iomem_resource, &code_resource); | |
844 | insert_resource(&iomem_resource, &data_resource); | |
845 | insert_resource(&iomem_resource, &bss_resource); | |
846 | ||
8b2cb7a8 HY |
847 | if (efi_enabled) |
848 | efi_init(); | |
849 | ||
76934ed4 | 850 | #ifdef CONFIG_X86_32 |
cc9f7a0c YL |
851 | if (ppro_with_ram_bug()) { |
852 | e820_update_range(0x70000000ULL, 0x40000ULL, E820_RAM, | |
853 | E820_RESERVED); | |
854 | sanitize_e820_map(e820.map, ARRAY_SIZE(e820.map), &e820.nr_map); | |
855 | printk(KERN_INFO "fixed physical RAM map:\n"); | |
856 | e820_print_map("bad_ppro"); | |
857 | } | |
76934ed4 YL |
858 | #else |
859 | early_gart_iommu_check(); | |
860 | #endif | |
cc9f7a0c | 861 | |
7b2a0a6c YL |
862 | /* |
863 | * partially used pages are not usable - thus | |
864 | * we are rounding upwards: | |
865 | */ | |
f361a450 | 866 | max_pfn = e820_end_of_ram_pfn(); |
7b2a0a6c | 867 | |
6780711e YL |
868 | /* preallocate 4k for mptable mpc */ |
869 | early_reserve_e820_mpc_new(); | |
093af8d7 YL |
870 | /* update e820 for memory not covered by WB MTRRs */ |
871 | mtrr_bp_init(); | |
2dc807b3 | 872 | if (mtrr_trim_uncached_memory(max_pfn)) |
f361a450 | 873 | max_pfn = e820_end_of_ram_pfn(); |
76c32418 | 874 | |
76934ed4 | 875 | #ifdef CONFIG_X86_32 |
4e29684c | 876 | /* max_low_pfn get updated here */ |
2ec65f8b | 877 | find_low_pfn_range(); |
76934ed4 YL |
878 | #else |
879 | num_physpages = max_pfn; | |
880 | ||
881 | check_efer(); | |
882 | ||
883 | /* How many end-of-memory variables you have, grandma! */ | |
884 | /* need this before calling reserve_initrd */ | |
f361a450 YL |
885 | if (max_pfn > (1UL<<(32 - PAGE_SHIFT))) |
886 | max_low_pfn = e820_end_of_low_ram_pfn(); | |
887 | else | |
888 | max_low_pfn = max_pfn; | |
889 | ||
76934ed4 YL |
890 | high_memory = (void *)__va(max_pfn * PAGE_SIZE - 1) + 1; |
891 | #endif | |
2ec65f8b | 892 | |
5394f80f JF |
893 | #ifdef CONFIG_X86_CHECK_BIOS_CORRUPTION |
894 | setup_bios_corruption_check(); | |
895 | #endif | |
896 | ||
4e29684c | 897 | /* max_pfn_mapped is updated here */ |
f361a450 YL |
898 | max_low_pfn_mapped = init_memory_mapping(0, max_low_pfn<<PAGE_SHIFT); |
899 | max_pfn_mapped = max_low_pfn_mapped; | |
900 | ||
901 | #ifdef CONFIG_X86_64 | |
902 | if (max_pfn > max_low_pfn) { | |
903 | max_pfn_mapped = init_memory_mapping(1UL<<32, | |
904 | max_pfn<<PAGE_SHIFT); | |
905 | /* can we preseve max_low_pfn ?*/ | |
906 | max_low_pfn = max_pfn; | |
907 | } | |
908 | #endif | |
4e29684c | 909 | |
e7b37895 YL |
910 | /* |
911 | * NOTE: On x86-32, only from this point on, fixmaps are ready for use. | |
912 | */ | |
913 | ||
914 | #ifdef CONFIG_PROVIDE_OHCI1394_DMA_INIT | |
915 | if (init_ohci1394_dma_early) | |
916 | init_ohci1394_dma_on_all_controllers(); | |
917 | #endif | |
918 | ||
2ec65f8b YL |
919 | reserve_initrd(); |
920 | ||
76934ed4 YL |
921 | #ifdef CONFIG_X86_64 |
922 | vsmp_init(); | |
923 | #endif | |
924 | ||
1c6e5503 YL |
925 | dmi_scan_machine(); |
926 | ||
927 | io_delay_init(); | |
928 | ||
1c6e5503 YL |
929 | /* |
930 | * Parse the ACPI tables for possible boot-time SMP configuration. | |
931 | */ | |
932 | acpi_boot_table_init(); | |
1c6e5503 YL |
933 | |
934 | #ifdef CONFIG_ACPI_NUMA | |
f2f865fe YL |
935 | /* |
936 | * Parse SRAT to discover nodes. | |
937 | */ | |
938 | acpi_numa_init(); | |
1c6e5503 YL |
939 | #endif |
940 | ||
2ec65f8b | 941 | initmem_init(0, max_pfn); |
093af8d7 | 942 | |
593a0cc3 YL |
943 | #ifdef CONFIG_ACPI_SLEEP |
944 | /* | |
945 | * Reserve low memory region for sleep support. | |
946 | */ | |
947 | acpi_reserve_bootmem(); | |
948 | #endif | |
d1b20afe | 949 | #ifdef CONFIG_X86_FIND_SMP_CONFIG |
593a0cc3 YL |
950 | /* |
951 | * Find and reserve possible boot-time SMP configuration: | |
952 | */ | |
953 | find_smp_config(); | |
954 | #endif | |
955 | reserve_crashkernel(); | |
956 | ||
91467bdf BW |
957 | #ifdef CONFIG_X86_64 |
958 | /* | |
959 | * dma32_reserve_bootmem() allocates bootmem which may conflict | |
960 | * with the crashkernel command line, so do that after | |
961 | * reserve_crashkernel() | |
962 | */ | |
963 | dma32_reserve_bootmem(); | |
964 | #endif | |
965 | ||
593a0cc3 YL |
966 | reserve_ibft_region(); |
967 | ||
790c73f6 GOC |
968 | #ifdef CONFIG_KVM_CLOCK |
969 | kvmclock_init(); | |
970 | #endif | |
971 | ||
a312b37b | 972 | paravirt_pagetable_setup_start(swapper_pg_dir); |
1da177e4 | 973 | paging_init(); |
a312b37b | 974 | paravirt_pagetable_setup_done(swapper_pg_dir); |
c1f2f09e | 975 | paravirt_post_allocator_init(); |
f212ec4b | 976 | |
76934ed4 YL |
977 | #ifdef CONFIG_X86_64 |
978 | map_vsyscall(); | |
979 | #endif | |
980 | ||
1da177e4 | 981 | #ifdef CONFIG_X86_GENERICARCH |
1a3f239d | 982 | generic_apic_probe(); |
cf8fa920 | 983 | #endif |
1da177e4 | 984 | |
54ef3400 | 985 | early_quirks(); |
d44647b0 | 986 | |
295deae4 YL |
987 | /* |
988 | * Read APIC and some other early information from ACPI tables. | |
989 | */ | |
1da177e4 | 990 | acpi_boot_init(); |
04606618 | 991 | |
e0da3364 | 992 | #if defined(CONFIG_X86_MPPARSE) || defined(CONFIG_X86_VISWS) |
295deae4 YL |
993 | /* |
994 | * get boot-time SMP configuration: | |
995 | */ | |
e0da3364 YL |
996 | if (smp_found_config) |
997 | get_smp_config(); | |
998 | #endif | |
76934ed4 | 999 | |
329513a3 | 1000 | prefill_possible_map(); |
5f4765f9 YL |
1001 | #ifdef CONFIG_X86_64 |
1002 | init_cpu_to_node(); | |
1003 | #endif | |
1004 | ||
76934ed4 YL |
1005 | init_apic_mappings(); |
1006 | ioapic_init_mappings(); | |
f3294a33 | 1007 | |
295deae4 | 1008 | kvm_guest_init(); |
1da177e4 | 1009 | |
41c094fd | 1010 | e820_reserve_resources(); |
bf62f398 | 1011 | e820_mark_nosave_regions(max_low_pfn); |
1da177e4 | 1012 | |
76934ed4 | 1013 | #ifdef CONFIG_X86_32 |
41c094fd | 1014 | request_resource(&iomem_resource, &video_ram_resource); |
76934ed4 | 1015 | #endif |
ce97c40e | 1016 | reserve_standard_io_resources(); |
41c094fd YL |
1017 | |
1018 | e820_setup_gap(); | |
1019 | ||
1da177e4 LT |
1020 | #ifdef CONFIG_VT |
1021 | #if defined(CONFIG_VGA_CONSOLE) | |
1022 | if (!efi_enabled || (efi_mem_type(0xa0000) != EFI_CONVENTIONAL_MEMORY)) | |
1023 | conswitchp = &vga_con; | |
1024 | #elif defined(CONFIG_DUMMY_CONSOLE) | |
1025 | conswitchp = &dummy_con; | |
1026 | #endif | |
1027 | #endif | |
1028 | } |