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Commit | Line | Data |
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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> |
1d9b16d1 | 96 | #include <asm/gart.h> |
46d671b5 YL |
97 | #include <asm/mmu_context.h> |
98 | #include <asm/proto.h> | |
99 | ||
100 | #include <mach_apic.h> | |
46d671b5 | 101 | #include <asm/paravirt.h> |
88b094fb | 102 | #include <asm/hypervisor.h> |
46d671b5 YL |
103 | |
104 | #include <asm/percpu.h> | |
46d671b5 YL |
105 | #include <asm/topology.h> |
106 | #include <asm/apicdef.h> | |
55f26239 YL |
107 | #ifdef CONFIG_X86_64 |
108 | #include <asm/numa_64.h> | |
109 | #endif | |
46d671b5 | 110 | |
042623bb YL |
111 | #ifndef ARCH_SETUP |
112 | #define ARCH_SETUP | |
113 | #endif | |
114 | ||
217b8ce8 YL |
115 | #ifndef CONFIG_DEBUG_BOOT_PARAMS |
116 | struct boot_params __initdata boot_params; | |
117 | #else | |
118 | struct boot_params boot_params; | |
119 | #endif | |
120 | ||
1da177e4 LT |
121 | /* |
122 | * Machine setup.. | |
123 | */ | |
c9cce83d BW |
124 | static struct resource data_resource = { |
125 | .name = "Kernel data", | |
126 | .start = 0, | |
127 | .end = 0, | |
128 | .flags = IORESOURCE_BUSY | IORESOURCE_MEM | |
129 | }; | |
130 | ||
131 | static struct resource code_resource = { | |
132 | .name = "Kernel code", | |
133 | .start = 0, | |
134 | .end = 0, | |
135 | .flags = IORESOURCE_BUSY | IORESOURCE_MEM | |
136 | }; | |
137 | ||
138 | static struct resource bss_resource = { | |
139 | .name = "Kernel bss", | |
140 | .start = 0, | |
141 | .end = 0, | |
142 | .flags = IORESOURCE_BUSY | IORESOURCE_MEM | |
143 | }; | |
144 | ||
7dea23ec YL |
145 | |
146 | #ifdef CONFIG_X86_32 | |
5092301c YL |
147 | /* This value is set up by the early boot code to point to the value |
148 | immediately after the boot time page tables. It contains a *physical* | |
149 | address, and must not be in the .bss segment! */ | |
150 | unsigned long init_pg_tables_start __initdata = ~0UL; | |
151 | unsigned long init_pg_tables_end __initdata = ~0UL; | |
152 | ||
c9cce83d BW |
153 | static struct resource video_ram_resource = { |
154 | .name = "Video RAM area", | |
155 | .start = 0xa0000, | |
156 | .end = 0xbffff, | |
157 | .flags = IORESOURCE_BUSY | IORESOURCE_MEM | |
158 | }; | |
159 | ||
1da177e4 | 160 | /* cpu data as detected by the assembly code in head.S */ |
7dea23ec | 161 | struct cpuinfo_x86 new_cpu_data __cpuinitdata = {0, 0, 0, 0, -1, 1, 0, 0, -1}; |
1da177e4 | 162 | /* common cpu data for all cpus */ |
7dea23ec | 163 | struct cpuinfo_x86 boot_cpu_data __read_mostly = {0, 0, 0, 0, -1, 1, 0, 0, -1}; |
129f6946 | 164 | EXPORT_SYMBOL(boot_cpu_data); |
7dea23ec YL |
165 | static void set_mca_bus(int x) |
166 | { | |
167 | #ifdef CONFIG_MCA | |
168 | MCA_bus = x; | |
169 | #endif | |
170 | } | |
1da177e4 | 171 | |
0c254e38 AS |
172 | unsigned int def_to_bigsmp; |
173 | ||
1da177e4 LT |
174 | /* for MCA, but anyone else can use it if they want */ |
175 | unsigned int machine_id; | |
176 | unsigned int machine_submodel_id; | |
177 | unsigned int BIOS_revision; | |
1da177e4 | 178 | |
7dea23ec YL |
179 | struct apm_info apm_info; |
180 | EXPORT_SYMBOL(apm_info); | |
181 | ||
182 | #if defined(CONFIG_X86_SPEEDSTEP_SMI) || \ | |
183 | defined(CONFIG_X86_SPEEDSTEP_SMI_MODULE) | |
184 | struct ist_info ist_info; | |
185 | EXPORT_SYMBOL(ist_info); | |
186 | #else | |
187 | struct ist_info ist_info; | |
188 | #endif | |
189 | ||
190 | #else | |
191 | struct cpuinfo_x86 boot_cpu_data __read_mostly; | |
192 | EXPORT_SYMBOL(boot_cpu_data); | |
193 | #endif | |
194 | ||
195 | ||
196 | #if !defined(CONFIG_X86_PAE) || defined(CONFIG_X86_64) | |
197 | unsigned long mmu_cr4_features; | |
198 | #else | |
199 | unsigned long mmu_cr4_features = X86_CR4_PAE; | |
200 | #endif | |
201 | ||
1da177e4 LT |
202 | /* Boot loader ID as an integer, for the benefit of proc_dointvec */ |
203 | int bootloader_type; | |
204 | ||
1c6e5503 YL |
205 | /* |
206 | * Early DMI memory | |
207 | */ | |
208 | int dmi_alloc_index; | |
209 | char dmi_alloc_data[DMI_MAX_DATA]; | |
210 | ||
1da177e4 LT |
211 | /* |
212 | * Setup options | |
213 | */ | |
1da177e4 | 214 | struct screen_info screen_info; |
129f6946 | 215 | EXPORT_SYMBOL(screen_info); |
1da177e4 | 216 | struct edid_info edid_info; |
5e518d76 | 217 | EXPORT_SYMBOL_GPL(edid_info); |
1da177e4 | 218 | |
1da177e4 LT |
219 | extern int root_mountflags; |
220 | ||
e44b7b75 | 221 | unsigned long saved_video_mode; |
1da177e4 | 222 | |
cf8fa920 | 223 | #define RAMDISK_IMAGE_START_MASK 0x07FF |
1da177e4 | 224 | #define RAMDISK_PROMPT_FLAG 0x8000 |
cf8fa920 | 225 | #define RAMDISK_LOAD_FLAG 0x4000 |
1da177e4 | 226 | |
4e498b66 | 227 | static char __initdata command_line[COMMAND_LINE_SIZE]; |
516cbf37 TB |
228 | #ifdef CONFIG_CMDLINE_BOOL |
229 | static char __initdata builtin_cmdline[COMMAND_LINE_SIZE] = CONFIG_CMDLINE; | |
230 | #endif | |
1da177e4 | 231 | |
1da177e4 LT |
232 | #if defined(CONFIG_EDD) || defined(CONFIG_EDD_MODULE) |
233 | struct edd edd; | |
234 | #ifdef CONFIG_EDD_MODULE | |
235 | EXPORT_SYMBOL(edd); | |
236 | #endif | |
237 | /** | |
238 | * copy_edd() - Copy the BIOS EDD information | |
239 | * from boot_params into a safe place. | |
240 | * | |
241 | */ | |
242 | static inline void copy_edd(void) | |
243 | { | |
30c82645 PA |
244 | memcpy(edd.mbr_signature, boot_params.edd_mbr_sig_buffer, |
245 | sizeof(edd.mbr_signature)); | |
246 | memcpy(edd.edd_info, boot_params.eddbuf, sizeof(edd.edd_info)); | |
247 | edd.mbr_signature_nr = boot_params.edd_mbr_sig_buf_entries; | |
248 | edd.edd_info_nr = boot_params.eddbuf_entries; | |
1da177e4 LT |
249 | } |
250 | #else | |
251 | static inline void copy_edd(void) | |
252 | { | |
253 | } | |
254 | #endif | |
255 | ||
cf8fa920 PA |
256 | #ifdef CONFIG_BLK_DEV_INITRD |
257 | ||
eb1379cb | 258 | #ifdef CONFIG_X86_32 |
cf8fa920 | 259 | |
eb1379cb YL |
260 | #define MAX_MAP_CHUNK (NR_FIX_BTMAPS << PAGE_SHIFT) |
261 | static void __init relocate_initrd(void) | |
cf8fa920 | 262 | { |
eb1379cb | 263 | |
ba5b14cc YL |
264 | u64 ramdisk_image = boot_params.hdr.ramdisk_image; |
265 | u64 ramdisk_size = boot_params.hdr.ramdisk_size; | |
ba5b14cc YL |
266 | u64 end_of_lowmem = max_low_pfn << PAGE_SHIFT; |
267 | u64 ramdisk_here; | |
eb1379cb YL |
268 | unsigned long slop, clen, mapaddr; |
269 | char *p, *q; | |
cf8fa920 PA |
270 | |
271 | /* We need to move the initrd down into lowmem */ | |
4e29684c YL |
272 | ramdisk_here = find_e820_area(0, end_of_lowmem, ramdisk_size, |
273 | PAGE_SIZE); | |
cf8fa920 | 274 | |
3945e2c9 YL |
275 | if (ramdisk_here == -1ULL) |
276 | panic("Cannot find place for new RAMDISK of size %lld\n", | |
277 | ramdisk_size); | |
278 | ||
cf8fa920 PA |
279 | /* Note: this includes all the lowmem currently occupied by |
280 | the initrd, we rely on that fact to keep the data intact. */ | |
3945e2c9 | 281 | reserve_early(ramdisk_here, ramdisk_here + ramdisk_size, |
ba5b14cc | 282 | "NEW RAMDISK"); |
cf8fa920 PA |
283 | initrd_start = ramdisk_here + PAGE_OFFSET; |
284 | initrd_end = initrd_start + ramdisk_size; | |
f0d43100 YL |
285 | printk(KERN_INFO "Allocated new RAMDISK: %08llx - %08llx\n", |
286 | ramdisk_here, ramdisk_here + ramdisk_size); | |
cf8fa920 | 287 | |
cf8fa920 PA |
288 | q = (char *)initrd_start; |
289 | ||
290 | /* Copy any lowmem portion of the initrd */ | |
291 | if (ramdisk_image < end_of_lowmem) { | |
292 | clen = end_of_lowmem - ramdisk_image; | |
293 | p = (char *)__va(ramdisk_image); | |
294 | memcpy(q, p, clen); | |
295 | q += clen; | |
296 | ramdisk_image += clen; | |
297 | ramdisk_size -= clen; | |
298 | } | |
299 | ||
300 | /* Copy the highmem portion of the initrd */ | |
301 | while (ramdisk_size) { | |
302 | slop = ramdisk_image & ~PAGE_MASK; | |
303 | clen = ramdisk_size; | |
304 | if (clen > MAX_MAP_CHUNK-slop) | |
305 | clen = MAX_MAP_CHUNK-slop; | |
306 | mapaddr = ramdisk_image & PAGE_MASK; | |
88b4c146 | 307 | p = early_memremap(mapaddr, clen+slop); |
cf8fa920 | 308 | memcpy(q, p+slop, clen); |
beacfaac | 309 | early_iounmap(p, clen+slop); |
cf8fa920 PA |
310 | q += clen; |
311 | ramdisk_image += clen; | |
312 | ramdisk_size -= clen; | |
313 | } | |
a4c81cf6 | 314 | /* high pages is not converted by early_res_to_bootmem */ |
ba5b14cc YL |
315 | ramdisk_image = boot_params.hdr.ramdisk_image; |
316 | ramdisk_size = boot_params.hdr.ramdisk_size; | |
eb1379cb YL |
317 | printk(KERN_INFO "Move RAMDISK from %016llx - %016llx to" |
318 | " %08llx - %08llx\n", | |
ba5b14cc YL |
319 | ramdisk_image, ramdisk_image + ramdisk_size - 1, |
320 | ramdisk_here, ramdisk_here + ramdisk_size - 1); | |
eb1379cb YL |
321 | } |
322 | #endif | |
9a27f5c5 | 323 | |
eb1379cb YL |
324 | static void __init reserve_initrd(void) |
325 | { | |
326 | u64 ramdisk_image = boot_params.hdr.ramdisk_image; | |
327 | u64 ramdisk_size = boot_params.hdr.ramdisk_size; | |
328 | u64 ramdisk_end = ramdisk_image + ramdisk_size; | |
329 | u64 end_of_lowmem = max_low_pfn << PAGE_SHIFT; | |
330 | ||
331 | if (!boot_params.hdr.type_of_loader || | |
332 | !ramdisk_image || !ramdisk_size) | |
333 | return; /* No initrd provided by bootloader */ | |
334 | ||
335 | initrd_start = 0; | |
336 | ||
337 | if (ramdisk_size >= (end_of_lowmem>>1)) { | |
338 | free_early(ramdisk_image, ramdisk_end); | |
339 | printk(KERN_ERR "initrd too large to handle, " | |
340 | "disabling initrd\n"); | |
341 | return; | |
342 | } | |
343 | ||
344 | printk(KERN_INFO "RAMDISK: %08llx - %08llx\n", ramdisk_image, | |
345 | ramdisk_end); | |
346 | ||
347 | ||
348 | if (ramdisk_end <= end_of_lowmem) { | |
349 | /* All in lowmem, easy case */ | |
350 | /* | |
351 | * don't need to reserve again, already reserved early | |
352 | * in i386_start_kernel | |
353 | */ | |
354 | initrd_start = ramdisk_image + PAGE_OFFSET; | |
355 | initrd_end = initrd_start + ramdisk_size; | |
356 | return; | |
357 | } | |
358 | ||
359 | #ifdef CONFIG_X86_32 | |
360 | relocate_initrd(); | |
361 | #else | |
362 | printk(KERN_ERR "initrd extends beyond end of memory " | |
363 | "(0x%08llx > 0x%08llx)\ndisabling initrd\n", | |
364 | ramdisk_end, end_of_lowmem); | |
365 | initrd_start = 0; | |
366 | #endif | |
367 | free_early(ramdisk_image, ramdisk_end); | |
cf8fa920 | 368 | } |
225c37d7 | 369 | #else |
eb1379cb | 370 | static void __init reserve_initrd(void) |
225c37d7 YL |
371 | { |
372 | } | |
cf8fa920 PA |
373 | #endif /* CONFIG_BLK_DEV_INITRD */ |
374 | ||
29f784e3 | 375 | static void __init parse_setup_data(void) |
257b0fde YL |
376 | { |
377 | struct setup_data *data; | |
378 | u64 pa_data; | |
379 | ||
380 | if (boot_params.hdr.version < 0x0209) | |
381 | return; | |
382 | pa_data = boot_params.hdr.setup_data; | |
383 | while (pa_data) { | |
88b4c146 | 384 | data = early_memremap(pa_data, PAGE_SIZE); |
257b0fde YL |
385 | switch (data->type) { |
386 | case SETUP_E820_EXT: | |
387 | parse_e820_ext(data, pa_data); | |
388 | break; | |
389 | default: | |
390 | break; | |
391 | } | |
257b0fde YL |
392 | pa_data = data->next; |
393 | early_iounmap(data, PAGE_SIZE); | |
394 | } | |
395 | } | |
396 | ||
a0a0becd | 397 | static void __init e820_reserve_setup_data(void) |
28bb2237 YL |
398 | { |
399 | struct setup_data *data; | |
400 | u64 pa_data; | |
d9a81b44 | 401 | int found = 0; |
28bb2237 YL |
402 | |
403 | if (boot_params.hdr.version < 0x0209) | |
404 | return; | |
405 | pa_data = boot_params.hdr.setup_data; | |
406 | while (pa_data) { | |
88b4c146 | 407 | data = early_memremap(pa_data, sizeof(*data)); |
28bb2237 YL |
408 | e820_update_range(pa_data, sizeof(*data)+data->len, |
409 | E820_RAM, E820_RESERVED_KERN); | |
d9a81b44 | 410 | found = 1; |
28bb2237 YL |
411 | pa_data = data->next; |
412 | early_iounmap(data, sizeof(*data)); | |
413 | } | |
d9a81b44 YL |
414 | if (!found) |
415 | return; | |
416 | ||
28bb2237 | 417 | sanitize_e820_map(e820.map, ARRAY_SIZE(e820.map), &e820.nr_map); |
a0a0becd | 418 | memcpy(&e820_saved, &e820, sizeof(struct e820map)); |
28bb2237 YL |
419 | printk(KERN_INFO "extended physical RAM map:\n"); |
420 | e820_print_map("reserve setup_data"); | |
421 | } | |
422 | ||
a0a0becd YL |
423 | static void __init reserve_early_setup_data(void) |
424 | { | |
425 | struct setup_data *data; | |
426 | u64 pa_data; | |
427 | char buf[32]; | |
428 | ||
429 | if (boot_params.hdr.version < 0x0209) | |
430 | return; | |
431 | pa_data = boot_params.hdr.setup_data; | |
432 | while (pa_data) { | |
88b4c146 | 433 | data = early_memremap(pa_data, sizeof(*data)); |
a0a0becd YL |
434 | sprintf(buf, "setup data %x", data->type); |
435 | reserve_early(pa_data, pa_data+sizeof(*data)+data->len, buf); | |
436 | pa_data = data->next; | |
437 | early_iounmap(data, sizeof(*data)); | |
438 | } | |
439 | } | |
440 | ||
ccb4defa YL |
441 | /* |
442 | * --------- Crashkernel reservation ------------------------------ | |
443 | */ | |
444 | ||
445 | #ifdef CONFIG_KEXEC | |
32105f7f BW |
446 | |
447 | /** | |
448 | * Reserve @size bytes of crashkernel memory at any suitable offset. | |
449 | * | |
450 | * @size: Size of the crashkernel memory to reserve. | |
451 | * Returns the base address on success, and -1ULL on failure. | |
452 | */ | |
a9b43c7d | 453 | static |
6b356022 | 454 | unsigned long long __init find_and_reserve_crashkernel(unsigned long long size) |
32105f7f BW |
455 | { |
456 | const unsigned long long alignment = 16<<20; /* 16M */ | |
457 | unsigned long long start = 0LL; | |
458 | ||
459 | while (1) { | |
460 | int ret; | |
461 | ||
462 | start = find_e820_area(start, ULONG_MAX, size, alignment); | |
463 | if (start == -1ULL) | |
464 | return start; | |
465 | ||
466 | /* try to reserve it */ | |
467 | ret = reserve_bootmem_generic(start, size, BOOTMEM_EXCLUSIVE); | |
468 | if (ret >= 0) | |
469 | return start; | |
470 | ||
471 | start += alignment; | |
472 | } | |
473 | } | |
474 | ||
ccb4defa YL |
475 | static inline unsigned long long get_total_mem(void) |
476 | { | |
477 | unsigned long long total; | |
478 | ||
479 | total = max_low_pfn - min_low_pfn; | |
480 | #ifdef CONFIG_HIGHMEM | |
481 | total += highend_pfn - highstart_pfn; | |
482 | #endif | |
483 | ||
484 | return total << PAGE_SHIFT; | |
485 | } | |
486 | ||
29f784e3 | 487 | static void __init reserve_crashkernel(void) |
ccb4defa YL |
488 | { |
489 | unsigned long long total_mem; | |
490 | unsigned long long crash_size, crash_base; | |
491 | int ret; | |
492 | ||
493 | total_mem = get_total_mem(); | |
494 | ||
495 | ret = parse_crashkernel(boot_command_line, total_mem, | |
496 | &crash_size, &crash_base); | |
32105f7f BW |
497 | if (ret != 0 || crash_size <= 0) |
498 | return; | |
499 | ||
500 | /* 0 means: find the address automatically */ | |
501 | if (crash_base <= 0) { | |
502 | crash_base = find_and_reserve_crashkernel(crash_size); | |
503 | if (crash_base == -1ULL) { | |
504 | pr_info("crashkernel reservation failed. " | |
505 | "No suitable area found.\n"); | |
ccb4defa YL |
506 | return; |
507 | } | |
32105f7f BW |
508 | } else { |
509 | ret = reserve_bootmem_generic(crash_base, crash_size, | |
510 | BOOTMEM_EXCLUSIVE); | |
511 | if (ret < 0) { | |
512 | pr_info("crashkernel reservation failed - " | |
513 | "memory is in use\n"); | |
ccb4defa YL |
514 | return; |
515 | } | |
32105f7f | 516 | } |
ccb4defa | 517 | |
32105f7f BW |
518 | printk(KERN_INFO "Reserving %ldMB of memory at %ldMB " |
519 | "for crashkernel (System RAM: %ldMB)\n", | |
520 | (unsigned long)(crash_size >> 20), | |
521 | (unsigned long)(crash_base >> 20), | |
522 | (unsigned long)(total_mem >> 20)); | |
ccb4defa | 523 | |
32105f7f BW |
524 | crashk_res.start = crash_base; |
525 | crashk_res.end = crash_base + crash_size - 1; | |
526 | insert_resource(&iomem_resource, &crashk_res); | |
ccb4defa YL |
527 | } |
528 | #else | |
29f784e3 | 529 | static void __init reserve_crashkernel(void) |
ccb4defa YL |
530 | { |
531 | } | |
532 | #endif | |
533 | ||
bdba0e70 YL |
534 | static struct resource standard_io_resources[] = { |
535 | { .name = "dma1", .start = 0x00, .end = 0x1f, | |
536 | .flags = IORESOURCE_BUSY | IORESOURCE_IO }, | |
537 | { .name = "pic1", .start = 0x20, .end = 0x21, | |
538 | .flags = IORESOURCE_BUSY | IORESOURCE_IO }, | |
539 | { .name = "timer0", .start = 0x40, .end = 0x43, | |
540 | .flags = IORESOURCE_BUSY | IORESOURCE_IO }, | |
541 | { .name = "timer1", .start = 0x50, .end = 0x53, | |
542 | .flags = IORESOURCE_BUSY | IORESOURCE_IO }, | |
543 | { .name = "keyboard", .start = 0x60, .end = 0x60, | |
544 | .flags = IORESOURCE_BUSY | IORESOURCE_IO }, | |
545 | { .name = "keyboard", .start = 0x64, .end = 0x64, | |
546 | .flags = IORESOURCE_BUSY | IORESOURCE_IO }, | |
547 | { .name = "dma page reg", .start = 0x80, .end = 0x8f, | |
548 | .flags = IORESOURCE_BUSY | IORESOURCE_IO }, | |
549 | { .name = "pic2", .start = 0xa0, .end = 0xa1, | |
550 | .flags = IORESOURCE_BUSY | IORESOURCE_IO }, | |
551 | { .name = "dma2", .start = 0xc0, .end = 0xdf, | |
552 | .flags = IORESOURCE_BUSY | IORESOURCE_IO }, | |
553 | { .name = "fpu", .start = 0xf0, .end = 0xff, | |
554 | .flags = IORESOURCE_BUSY | IORESOURCE_IO } | |
555 | }; | |
556 | ||
29f784e3 | 557 | static void __init reserve_standard_io_resources(void) |
bdba0e70 YL |
558 | { |
559 | int i; | |
560 | ||
561 | /* request I/O space for devices used on all i[345]86 PCs */ | |
562 | for (i = 0; i < ARRAY_SIZE(standard_io_resources); i++) | |
563 | request_resource(&ioport_resource, &standard_io_resources[i]); | |
564 | ||
565 | } | |
566 | ||
57cac4d1 VG |
567 | /* |
568 | * Note: elfcorehdr_addr is not just limited to vmcore. It is also used by | |
569 | * is_kdump_kernel() to determine if we are booting after a panic. Hence | |
570 | * ifdef it under CONFIG_CRASH_DUMP and not CONFIG_PROC_VMCORE. | |
571 | */ | |
572 | ||
573 | #ifdef CONFIG_CRASH_DUMP | |
0196bcbb YL |
574 | /* elfcorehdr= specifies the location of elf core header |
575 | * stored by the crashed kernel. This option will be passed | |
576 | * by kexec loader to the capture kernel. | |
577 | */ | |
578 | static int __init setup_elfcorehdr(char *arg) | |
579 | { | |
580 | char *end; | |
581 | if (!arg) | |
582 | return -EINVAL; | |
583 | elfcorehdr_addr = memparse(arg, &end); | |
584 | return end > arg ? 0 : -EINVAL; | |
585 | } | |
586 | early_param("elfcorehdr", setup_elfcorehdr); | |
587 | #endif | |
588 | ||
54ac14a8 | 589 | static int __init default_update_genapic(void) |
9f077871 | 590 | { |
f632ddcc IM |
591 | #ifdef CONFIG_X86_SMP |
592 | # if defined(CONFIG_X86_GENERICARCH) || defined(CONFIG_X86_64) | |
593 | genapic->wakeup_cpu = wakeup_secondary_cpu_via_init; | |
594 | # endif | |
c885df50 | 595 | #endif |
9f077871 | 596 | |
54ac14a8 | 597 | return 0; |
bb577f98 HD |
598 | } |
599 | ||
54ac14a8 YL |
600 | static struct x86_quirks default_x86_quirks __initdata = { |
601 | .update_genapic = default_update_genapic, | |
602 | }; | |
9f077871 | 603 | |
3c9cb6de | 604 | struct x86_quirks *x86_quirks __initdata = &default_x86_quirks; |
5394f80f | 605 | |
bb557460 | 606 | #ifdef CONFIG_X86_RESERVE_LOW_64K |
5649b7c3 IM |
607 | static int __init dmi_low_memory_corruption(const struct dmi_system_id *d) |
608 | { | |
609 | printk(KERN_NOTICE | |
45608399 | 610 | "%s detected: BIOS may corrupt low RAM, working around it.\n", |
5649b7c3 IM |
611 | d->ident); |
612 | ||
2216d199 YL |
613 | e820_update_range(0, 0x10000, E820_RAM, E820_RESERVED); |
614 | sanitize_e820_map(e820.map, ARRAY_SIZE(e820.map), &e820.nr_map); | |
5649b7c3 IM |
615 | |
616 | return 0; | |
617 | } | |
bb557460 | 618 | #endif |
5649b7c3 IM |
619 | |
620 | /* List of systems that have known low memory corruption BIOS problems */ | |
621 | static struct dmi_system_id __initdata bad_bios_dmi_table[] = { | |
fc381519 | 622 | #ifdef CONFIG_X86_RESERVE_LOW_64K |
5649b7c3 IM |
623 | { |
624 | .callback = dmi_low_memory_corruption, | |
625 | .ident = "AMI BIOS", | |
626 | .matches = { | |
627 | DMI_MATCH(DMI_BIOS_VENDOR, "American Megatrends Inc."), | |
628 | }, | |
629 | }, | |
1e22436e IM |
630 | { |
631 | .callback = dmi_low_memory_corruption, | |
632 | .ident = "Phoenix BIOS", | |
633 | .matches = { | |
0af40a4b | 634 | DMI_MATCH(DMI_BIOS_VENDOR, "Phoenix Technologies"), |
1e22436e IM |
635 | }, |
636 | }, | |
fc381519 | 637 | #endif |
a8b71a28 | 638 | {} |
5649b7c3 IM |
639 | }; |
640 | ||
1da177e4 LT |
641 | /* |
642 | * Determine if we were loaded by an EFI loader. If so, then we have also been | |
643 | * passed the efi memmap, systab, etc., so we should use these data structures | |
644 | * for initialization. Note, the efi init code path is determined by the | |
645 | * global efi_enabled. This allows the same kernel image to be used on existing | |
646 | * systems (with a traditional BIOS) as well as on EFI systems. | |
647 | */ | |
76934ed4 YL |
648 | /* |
649 | * setup_arch - architecture-specific boot-time initializations | |
650 | * | |
651 | * Note: On x86_64, fixmaps are ready for use even before this is called. | |
652 | */ | |
653 | ||
1da177e4 LT |
654 | void __init setup_arch(char **cmdline_p) |
655 | { | |
76934ed4 | 656 | #ifdef CONFIG_X86_32 |
1da177e4 | 657 | memcpy(&boot_cpu_data, &new_cpu_data, sizeof(new_cpu_data)); |
3b33553b | 658 | visws_early_detect(); |
1da177e4 | 659 | pre_setup_arch_hook(); |
76934ed4 YL |
660 | #else |
661 | printk(KERN_INFO "Command line: %s\n", boot_command_line); | |
662 | #endif | |
1da177e4 | 663 | |
ae8d04e2 ZA |
664 | /* VMI may relocate the fixmap; do this before touching ioremap area */ |
665 | vmi_init(); | |
666 | ||
9e882c92 | 667 | early_cpu_init(); |
1a98fd14 JF |
668 | early_ioremap_init(); |
669 | ||
30c82645 PA |
670 | ROOT_DEV = old_decode_dev(boot_params.hdr.root_dev); |
671 | screen_info = boot_params.screen_info; | |
672 | edid_info = boot_params.edid_info; | |
76934ed4 | 673 | #ifdef CONFIG_X86_32 |
30c82645 PA |
674 | apm_info.bios = boot_params.apm_bios_info; |
675 | ist_info = boot_params.ist_info; | |
76934ed4 | 676 | if (boot_params.sys_desc_table.length != 0) { |
30c82645 PA |
677 | set_mca_bus(boot_params.sys_desc_table.table[3] & 0x2); |
678 | machine_id = boot_params.sys_desc_table.table[0]; | |
679 | machine_submodel_id = boot_params.sys_desc_table.table[1]; | |
680 | BIOS_revision = boot_params.sys_desc_table.table[2]; | |
1da177e4 | 681 | } |
76934ed4 YL |
682 | #endif |
683 | saved_video_mode = boot_params.hdr.vid_mode; | |
30c82645 | 684 | bootloader_type = boot_params.hdr.type_of_loader; |
1da177e4 LT |
685 | |
686 | #ifdef CONFIG_BLK_DEV_RAM | |
30c82645 PA |
687 | rd_image_start = boot_params.hdr.ram_size & RAMDISK_IMAGE_START_MASK; |
688 | rd_prompt = ((boot_params.hdr.ram_size & RAMDISK_PROMPT_FLAG) != 0); | |
689 | rd_doload = ((boot_params.hdr.ram_size & RAMDISK_LOAD_FLAG) != 0); | |
1da177e4 | 690 | #endif |
7465252e YL |
691 | #ifdef CONFIG_EFI |
692 | if (!strncmp((char *)&boot_params.efi_info.efi_loader_signature, | |
76934ed4 YL |
693 | #ifdef CONFIG_X86_32 |
694 | "EL32", | |
695 | #else | |
696 | "EL64", | |
697 | #endif | |
698 | 4)) { | |
7465252e YL |
699 | efi_enabled = 1; |
700 | efi_reserve_early(); | |
701 | } | |
702 | #endif | |
703 | ||
1da177e4 | 704 | ARCH_SETUP |
2215e69d | 705 | |
0dbfafa5 | 706 | setup_memory_map(); |
28bb2237 | 707 | parse_setup_data(); |
a0a0becd YL |
708 | /* update the e820_saved too */ |
709 | e820_reserve_setup_data(); | |
28bb2237 | 710 | |
1da177e4 LT |
711 | copy_edd(); |
712 | ||
30c82645 | 713 | if (!boot_params.hdr.root_flags) |
1da177e4 LT |
714 | root_mountflags &= ~MS_RDONLY; |
715 | init_mm.start_code = (unsigned long) _text; | |
716 | init_mm.end_code = (unsigned long) _etext; | |
717 | init_mm.end_data = (unsigned long) _edata; | |
76934ed4 | 718 | #ifdef CONFIG_X86_32 |
1da177e4 | 719 | init_mm.brk = init_pg_tables_end + PAGE_OFFSET; |
76934ed4 YL |
720 | #else |
721 | init_mm.brk = (unsigned long) &_end; | |
722 | #endif | |
1da177e4 LT |
723 | |
724 | code_resource.start = virt_to_phys(_text); | |
725 | code_resource.end = virt_to_phys(_etext)-1; | |
726 | data_resource.start = virt_to_phys(_etext); | |
727 | data_resource.end = virt_to_phys(_edata)-1; | |
00bf4098 BW |
728 | bss_resource.start = virt_to_phys(&__bss_start); |
729 | bss_resource.end = virt_to_phys(&__bss_stop)-1; | |
1da177e4 | 730 | |
516cbf37 TB |
731 | #ifdef CONFIG_CMDLINE_BOOL |
732 | #ifdef CONFIG_CMDLINE_OVERRIDE | |
733 | strlcpy(boot_command_line, builtin_cmdline, COMMAND_LINE_SIZE); | |
734 | #else | |
735 | if (builtin_cmdline[0]) { | |
736 | /* append boot loader cmdline to builtin */ | |
737 | strlcat(builtin_cmdline, " ", COMMAND_LINE_SIZE); | |
738 | strlcat(builtin_cmdline, boot_command_line, COMMAND_LINE_SIZE); | |
739 | strlcpy(boot_command_line, builtin_cmdline, COMMAND_LINE_SIZE); | |
740 | } | |
741 | #endif | |
742 | #endif | |
743 | ||
9a2e5930 YL |
744 | strlcpy(command_line, boot_command_line, COMMAND_LINE_SIZE); |
745 | *cmdline_p = command_line; | |
746 | ||
1a3f239d | 747 | parse_early_param(); |
1da177e4 | 748 | |
0ad5bce7 JF |
749 | #ifdef CONFIG_X86_64 |
750 | check_efer(); | |
751 | #endif | |
752 | ||
ae8d04e2 ZA |
753 | /* Must be before kernel pagetables are setup */ |
754 | vmi_activate(); | |
3a6ddd5f | 755 | |
28bb2237 | 756 | /* after early param, so could get panic from serial */ |
a0a0becd | 757 | reserve_early_setup_data(); |
28bb2237 | 758 | |
76934ed4 | 759 | if (acpi_mps_check()) { |
3eb11edc | 760 | #ifdef CONFIG_X86_LOCAL_APIC |
76934ed4 | 761 | disable_apic = 1; |
3eb11edc | 762 | #endif |
988781dc | 763 | setup_clear_cpu_cap(X86_FEATURE_APIC); |
3c999f14 YL |
764 | } |
765 | ||
dc7c65db LT |
766 | #ifdef CONFIG_PCI |
767 | if (pci_early_dump_regs) | |
768 | early_dump_pci_devices(); | |
769 | #endif | |
770 | ||
0dbfafa5 | 771 | finish_e820_parsing(); |
1a3f239d | 772 | |
2216d199 YL |
773 | dmi_scan_machine(); |
774 | ||
775 | dmi_check_system(bad_bios_dmi_table); | |
776 | ||
88b094fb AK |
777 | /* |
778 | * VMware detection requires dmi to be available, so this | |
779 | * needs to be done after dmi_scan_machine, for the BP. | |
780 | */ | |
781 | init_hypervisor(&boot_cpu_data); | |
782 | ||
76934ed4 | 783 | #ifdef CONFIG_X86_32 |
41c094fd | 784 | probe_roms(); |
76934ed4 | 785 | #endif |
41c094fd YL |
786 | |
787 | /* after parse_early_param, so could debug it */ | |
788 | insert_resource(&iomem_resource, &code_resource); | |
789 | insert_resource(&iomem_resource, &data_resource); | |
790 | insert_resource(&iomem_resource, &bss_resource); | |
791 | ||
8b2cb7a8 HY |
792 | if (efi_enabled) |
793 | efi_init(); | |
794 | ||
76934ed4 | 795 | #ifdef CONFIG_X86_32 |
cc9f7a0c YL |
796 | if (ppro_with_ram_bug()) { |
797 | e820_update_range(0x70000000ULL, 0x40000ULL, E820_RAM, | |
798 | E820_RESERVED); | |
799 | sanitize_e820_map(e820.map, ARRAY_SIZE(e820.map), &e820.nr_map); | |
800 | printk(KERN_INFO "fixed physical RAM map:\n"); | |
801 | e820_print_map("bad_ppro"); | |
802 | } | |
76934ed4 YL |
803 | #else |
804 | early_gart_iommu_check(); | |
805 | #endif | |
cc9f7a0c | 806 | |
7b2a0a6c YL |
807 | /* |
808 | * partially used pages are not usable - thus | |
809 | * we are rounding upwards: | |
810 | */ | |
f361a450 | 811 | max_pfn = e820_end_of_ram_pfn(); |
7b2a0a6c | 812 | |
6780711e YL |
813 | /* preallocate 4k for mptable mpc */ |
814 | early_reserve_e820_mpc_new(); | |
093af8d7 YL |
815 | /* update e820 for memory not covered by WB MTRRs */ |
816 | mtrr_bp_init(); | |
2dc807b3 | 817 | if (mtrr_trim_uncached_memory(max_pfn)) |
f361a450 | 818 | max_pfn = e820_end_of_ram_pfn(); |
76c32418 | 819 | |
76934ed4 | 820 | #ifdef CONFIG_X86_32 |
4e29684c | 821 | /* max_low_pfn get updated here */ |
2ec65f8b | 822 | find_low_pfn_range(); |
76934ed4 YL |
823 | #else |
824 | num_physpages = max_pfn; | |
825 | ||
6e1cb38a SS |
826 | if (cpu_has_x2apic) |
827 | check_x2apic(); | |
76934ed4 YL |
828 | |
829 | /* How many end-of-memory variables you have, grandma! */ | |
830 | /* need this before calling reserve_initrd */ | |
f361a450 YL |
831 | if (max_pfn > (1UL<<(32 - PAGE_SHIFT))) |
832 | max_low_pfn = e820_end_of_low_ram_pfn(); | |
833 | else | |
834 | max_low_pfn = max_pfn; | |
835 | ||
76934ed4 YL |
836 | high_memory = (void *)__va(max_pfn * PAGE_SIZE - 1) + 1; |
837 | #endif | |
2ec65f8b | 838 | |
5394f80f JF |
839 | #ifdef CONFIG_X86_CHECK_BIOS_CORRUPTION |
840 | setup_bios_corruption_check(); | |
841 | #endif | |
842 | ||
4e29684c | 843 | /* max_pfn_mapped is updated here */ |
f361a450 YL |
844 | max_low_pfn_mapped = init_memory_mapping(0, max_low_pfn<<PAGE_SHIFT); |
845 | max_pfn_mapped = max_low_pfn_mapped; | |
846 | ||
847 | #ifdef CONFIG_X86_64 | |
848 | if (max_pfn > max_low_pfn) { | |
849 | max_pfn_mapped = init_memory_mapping(1UL<<32, | |
850 | max_pfn<<PAGE_SHIFT); | |
851 | /* can we preseve max_low_pfn ?*/ | |
852 | max_low_pfn = max_pfn; | |
853 | } | |
854 | #endif | |
4e29684c | 855 | |
e7b37895 YL |
856 | /* |
857 | * NOTE: On x86-32, only from this point on, fixmaps are ready for use. | |
858 | */ | |
859 | ||
860 | #ifdef CONFIG_PROVIDE_OHCI1394_DMA_INIT | |
861 | if (init_ohci1394_dma_early) | |
862 | init_ohci1394_dma_on_all_controllers(); | |
863 | #endif | |
864 | ||
2ec65f8b YL |
865 | reserve_initrd(); |
866 | ||
76934ed4 YL |
867 | #ifdef CONFIG_X86_64 |
868 | vsmp_init(); | |
869 | #endif | |
870 | ||
1c6e5503 YL |
871 | io_delay_init(); |
872 | ||
1c6e5503 YL |
873 | /* |
874 | * Parse the ACPI tables for possible boot-time SMP configuration. | |
875 | */ | |
876 | acpi_boot_table_init(); | |
1c6e5503 | 877 | |
2e42060c JS |
878 | early_acpi_boot_init(); |
879 | ||
1c6e5503 | 880 | #ifdef CONFIG_ACPI_NUMA |
f2f865fe YL |
881 | /* |
882 | * Parse SRAT to discover nodes. | |
883 | */ | |
884 | acpi_numa_init(); | |
1c6e5503 YL |
885 | #endif |
886 | ||
2ec65f8b | 887 | initmem_init(0, max_pfn); |
093af8d7 | 888 | |
593a0cc3 YL |
889 | #ifdef CONFIG_ACPI_SLEEP |
890 | /* | |
891 | * Reserve low memory region for sleep support. | |
892 | */ | |
893 | acpi_reserve_bootmem(); | |
894 | #endif | |
d1b20afe | 895 | #ifdef CONFIG_X86_FIND_SMP_CONFIG |
593a0cc3 YL |
896 | /* |
897 | * Find and reserve possible boot-time SMP configuration: | |
898 | */ | |
899 | find_smp_config(); | |
900 | #endif | |
901 | reserve_crashkernel(); | |
902 | ||
91467bdf BW |
903 | #ifdef CONFIG_X86_64 |
904 | /* | |
905 | * dma32_reserve_bootmem() allocates bootmem which may conflict | |
906 | * with the crashkernel command line, so do that after | |
907 | * reserve_crashkernel() | |
908 | */ | |
909 | dma32_reserve_bootmem(); | |
910 | #endif | |
911 | ||
593a0cc3 YL |
912 | reserve_ibft_region(); |
913 | ||
790c73f6 GOC |
914 | #ifdef CONFIG_KVM_CLOCK |
915 | kvmclock_init(); | |
916 | #endif | |
917 | ||
a312b37b | 918 | paravirt_pagetable_setup_start(swapper_pg_dir); |
1da177e4 | 919 | paging_init(); |
a312b37b | 920 | paravirt_pagetable_setup_done(swapper_pg_dir); |
c1f2f09e | 921 | paravirt_post_allocator_init(); |
f212ec4b | 922 | |
76934ed4 YL |
923 | #ifdef CONFIG_X86_64 |
924 | map_vsyscall(); | |
925 | #endif | |
926 | ||
1da177e4 | 927 | #ifdef CONFIG_X86_GENERICARCH |
1a3f239d | 928 | generic_apic_probe(); |
cf8fa920 | 929 | #endif |
1da177e4 | 930 | |
54ef3400 | 931 | early_quirks(); |
d44647b0 | 932 | |
295deae4 YL |
933 | /* |
934 | * Read APIC and some other early information from ACPI tables. | |
935 | */ | |
1da177e4 | 936 | acpi_boot_init(); |
04606618 | 937 | |
e0da3364 | 938 | #if defined(CONFIG_X86_MPPARSE) || defined(CONFIG_X86_VISWS) |
295deae4 YL |
939 | /* |
940 | * get boot-time SMP configuration: | |
941 | */ | |
e0da3364 YL |
942 | if (smp_found_config) |
943 | get_smp_config(); | |
944 | #endif | |
76934ed4 | 945 | |
329513a3 | 946 | prefill_possible_map(); |
301e6190 | 947 | |
5f4765f9 YL |
948 | #ifdef CONFIG_X86_64 |
949 | init_cpu_to_node(); | |
950 | #endif | |
951 | ||
76934ed4 YL |
952 | init_apic_mappings(); |
953 | ioapic_init_mappings(); | |
f3294a33 | 954 | |
9d6a4d08 | 955 | /* need to wait for io_apic is mapped */ |
be5d5350 | 956 | probe_nr_irqs_gsi(); |
9d6a4d08 | 957 | |
295deae4 | 958 | kvm_guest_init(); |
1da177e4 | 959 | |
41c094fd | 960 | e820_reserve_resources(); |
bf62f398 | 961 | e820_mark_nosave_regions(max_low_pfn); |
1da177e4 | 962 | |
76934ed4 | 963 | #ifdef CONFIG_X86_32 |
41c094fd | 964 | request_resource(&iomem_resource, &video_ram_resource); |
76934ed4 | 965 | #endif |
ce97c40e | 966 | reserve_standard_io_resources(); |
41c094fd YL |
967 | |
968 | e820_setup_gap(); | |
969 | ||
1da177e4 LT |
970 | #ifdef CONFIG_VT |
971 | #if defined(CONFIG_VGA_CONSOLE) | |
972 | if (!efi_enabled || (efi_mem_type(0xa0000) != EFI_CONVENTIONAL_MEMORY)) | |
973 | conswitchp = &vga_con; | |
974 | #elif defined(CONFIG_DUMMY_CONSOLE) | |
975 | conswitchp = &dummy_con; | |
976 | #endif | |
977 | #endif | |
978 | } | |
5649b7c3 IM |
979 | |
980 |