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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> | |
60 | #include <linux/highmem.h> | |
61 | ||
62 | #include <linux/kallsyms.h> | |
63 | #include <linux/edd.h> | |
64 | #include <linux/iscsi_ibft.h> | |
65 | #include <linux/kexec.h> | |
66 | #include <linux/cpufreq.h> | |
67 | #include <linux/dma-mapping.h> | |
68 | #include <linux/ctype.h> | |
69 | #include <linux/uaccess.h> | |
70 | ||
71 | #include <linux/percpu.h> | |
72 | #include <linux/crash_dump.h> | |
73 | ||
1da177e4 | 74 | #include <video/edid.h> |
1bc3b91a | 75 | |
093af8d7 | 76 | #include <asm/mtrr.h> |
9635b47d | 77 | #include <asm/apic.h> |
1da177e4 LT |
78 | #include <asm/e820.h> |
79 | #include <asm/mpspec.h> | |
80 | #include <asm/setup.h> | |
81 | #include <asm/arch_hooks.h> | |
55f26239 | 82 | #include <asm/efi.h> |
1da177e4 | 83 | #include <asm/sections.h> |
1c6e5503 | 84 | #include <asm/dmi.h> |
1da177e4 LT |
85 | #include <asm/io_apic.h> |
86 | #include <asm/ist.h> | |
7ce0bcfd | 87 | #include <asm/vmi.h> |
e75eac33 | 88 | #include <setup_arch.h> |
ce3fe6b2 | 89 | #include <asm/bios_ebda.h> |
00bf4098 | 90 | #include <asm/cacheflush.h> |
2fde61fd | 91 | #include <asm/processor.h> |
cc9f7a0c | 92 | #include <asm/bugs.h> |
1da177e4 | 93 | |
46d671b5 YL |
94 | #include <asm/system.h> |
95 | #include <asm/vsyscall.h> | |
96 | #include <asm/smp.h> | |
97 | #include <asm/desc.h> | |
98 | #include <asm/dma.h> | |
99 | #include <asm/gart.h> | |
100 | #include <asm/mmu_context.h> | |
101 | #include <asm/proto.h> | |
102 | ||
103 | #include <mach_apic.h> | |
46d671b5 | 104 | #include <asm/paravirt.h> |
46d671b5 YL |
105 | |
106 | #include <asm/percpu.h> | |
107 | #include <asm/sections.h> | |
108 | #include <asm/topology.h> | |
109 | #include <asm/apicdef.h> | |
55f26239 YL |
110 | #ifdef CONFIG_X86_64 |
111 | #include <asm/numa_64.h> | |
112 | #endif | |
46d671b5 | 113 | |
042623bb YL |
114 | #ifndef ARCH_SETUP |
115 | #define ARCH_SETUP | |
116 | #endif | |
117 | ||
217b8ce8 YL |
118 | #ifndef CONFIG_DEBUG_BOOT_PARAMS |
119 | struct boot_params __initdata boot_params; | |
120 | #else | |
121 | struct boot_params boot_params; | |
122 | #endif | |
123 | ||
1da177e4 LT |
124 | /* |
125 | * Machine setup.. | |
126 | */ | |
c9cce83d BW |
127 | static struct resource data_resource = { |
128 | .name = "Kernel data", | |
129 | .start = 0, | |
130 | .end = 0, | |
131 | .flags = IORESOURCE_BUSY | IORESOURCE_MEM | |
132 | }; | |
133 | ||
134 | static struct resource code_resource = { | |
135 | .name = "Kernel code", | |
136 | .start = 0, | |
137 | .end = 0, | |
138 | .flags = IORESOURCE_BUSY | IORESOURCE_MEM | |
139 | }; | |
140 | ||
141 | static struct resource bss_resource = { | |
142 | .name = "Kernel bss", | |
143 | .start = 0, | |
144 | .end = 0, | |
145 | .flags = IORESOURCE_BUSY | IORESOURCE_MEM | |
146 | }; | |
147 | ||
7dea23ec YL |
148 | |
149 | #ifdef CONFIG_X86_32 | |
5092301c YL |
150 | /* This value is set up by the early boot code to point to the value |
151 | immediately after the boot time page tables. It contains a *physical* | |
152 | address, and must not be in the .bss segment! */ | |
153 | unsigned long init_pg_tables_start __initdata = ~0UL; | |
154 | unsigned long init_pg_tables_end __initdata = ~0UL; | |
155 | ||
c9cce83d BW |
156 | static struct resource video_ram_resource = { |
157 | .name = "Video RAM area", | |
158 | .start = 0xa0000, | |
159 | .end = 0xbffff, | |
160 | .flags = IORESOURCE_BUSY | IORESOURCE_MEM | |
161 | }; | |
162 | ||
1da177e4 | 163 | /* cpu data as detected by the assembly code in head.S */ |
7dea23ec | 164 | struct cpuinfo_x86 new_cpu_data __cpuinitdata = {0, 0, 0, 0, -1, 1, 0, 0, -1}; |
1da177e4 | 165 | /* common cpu data for all cpus */ |
7dea23ec | 166 | struct cpuinfo_x86 boot_cpu_data __read_mostly = {0, 0, 0, 0, -1, 1, 0, 0, -1}; |
129f6946 | 167 | EXPORT_SYMBOL(boot_cpu_data); |
7dea23ec YL |
168 | static void set_mca_bus(int x) |
169 | { | |
170 | #ifdef CONFIG_MCA | |
171 | MCA_bus = x; | |
172 | #endif | |
173 | } | |
1da177e4 | 174 | |
0c254e38 AS |
175 | unsigned int def_to_bigsmp; |
176 | ||
1da177e4 LT |
177 | /* for MCA, but anyone else can use it if they want */ |
178 | unsigned int machine_id; | |
179 | unsigned int machine_submodel_id; | |
180 | unsigned int BIOS_revision; | |
1da177e4 | 181 | |
7dea23ec YL |
182 | struct apm_info apm_info; |
183 | EXPORT_SYMBOL(apm_info); | |
184 | ||
185 | #if defined(CONFIG_X86_SPEEDSTEP_SMI) || \ | |
186 | defined(CONFIG_X86_SPEEDSTEP_SMI_MODULE) | |
187 | struct ist_info ist_info; | |
188 | EXPORT_SYMBOL(ist_info); | |
189 | #else | |
190 | struct ist_info ist_info; | |
191 | #endif | |
192 | ||
193 | #else | |
194 | struct cpuinfo_x86 boot_cpu_data __read_mostly; | |
195 | EXPORT_SYMBOL(boot_cpu_data); | |
196 | #endif | |
197 | ||
198 | ||
199 | #if !defined(CONFIG_X86_PAE) || defined(CONFIG_X86_64) | |
200 | unsigned long mmu_cr4_features; | |
201 | #else | |
202 | unsigned long mmu_cr4_features = X86_CR4_PAE; | |
203 | #endif | |
204 | ||
1da177e4 LT |
205 | /* Boot loader ID as an integer, for the benefit of proc_dointvec */ |
206 | int bootloader_type; | |
207 | ||
1c6e5503 YL |
208 | /* |
209 | * Early DMI memory | |
210 | */ | |
211 | int dmi_alloc_index; | |
212 | char dmi_alloc_data[DMI_MAX_DATA]; | |
213 | ||
1da177e4 LT |
214 | /* |
215 | * Setup options | |
216 | */ | |
1da177e4 | 217 | struct screen_info screen_info; |
129f6946 | 218 | EXPORT_SYMBOL(screen_info); |
1da177e4 | 219 | struct edid_info edid_info; |
5e518d76 | 220 | EXPORT_SYMBOL_GPL(edid_info); |
1da177e4 | 221 | |
1da177e4 LT |
222 | extern int root_mountflags; |
223 | ||
e44b7b75 | 224 | unsigned long saved_video_mode; |
1da177e4 | 225 | |
cf8fa920 | 226 | #define RAMDISK_IMAGE_START_MASK 0x07FF |
1da177e4 | 227 | #define RAMDISK_PROMPT_FLAG 0x8000 |
cf8fa920 | 228 | #define RAMDISK_LOAD_FLAG 0x4000 |
1da177e4 | 229 | |
4e498b66 | 230 | static char __initdata command_line[COMMAND_LINE_SIZE]; |
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; | |
beacfaac | 307 | p = early_ioremap(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) { | |
384 | data = early_ioremap(pa_data, PAGE_SIZE); | |
385 | switch (data->type) { | |
386 | case SETUP_E820_EXT: | |
387 | parse_e820_ext(data, pa_data); | |
388 | break; | |
389 | default: | |
390 | break; | |
391 | } | |
392 | #ifndef CONFIG_DEBUG_BOOT_PARAMS | |
393 | free_early(pa_data, pa_data+sizeof(*data)+data->len); | |
394 | #endif | |
395 | pa_data = data->next; | |
396 | early_iounmap(data, PAGE_SIZE); | |
397 | } | |
398 | } | |
399 | ||
ccb4defa YL |
400 | /* |
401 | * --------- Crashkernel reservation ------------------------------ | |
402 | */ | |
403 | ||
404 | #ifdef CONFIG_KEXEC | |
405 | static inline unsigned long long get_total_mem(void) | |
406 | { | |
407 | unsigned long long total; | |
408 | ||
409 | total = max_low_pfn - min_low_pfn; | |
410 | #ifdef CONFIG_HIGHMEM | |
411 | total += highend_pfn - highstart_pfn; | |
412 | #endif | |
413 | ||
414 | return total << PAGE_SHIFT; | |
415 | } | |
416 | ||
29f784e3 | 417 | static void __init reserve_crashkernel(void) |
ccb4defa YL |
418 | { |
419 | unsigned long long total_mem; | |
420 | unsigned long long crash_size, crash_base; | |
421 | int ret; | |
422 | ||
423 | total_mem = get_total_mem(); | |
424 | ||
425 | ret = parse_crashkernel(boot_command_line, total_mem, | |
426 | &crash_size, &crash_base); | |
427 | if (ret == 0 && crash_size > 0) { | |
428 | if (crash_base <= 0) { | |
429 | printk(KERN_INFO "crashkernel reservation failed - " | |
430 | "you have to specify a base address\n"); | |
431 | return; | |
432 | } | |
433 | ||
434 | if (reserve_bootmem_generic(crash_base, crash_size, | |
435 | BOOTMEM_EXCLUSIVE) < 0) { | |
436 | printk(KERN_INFO "crashkernel reservation failed - " | |
437 | "memory is in use\n"); | |
438 | return; | |
439 | } | |
440 | ||
441 | printk(KERN_INFO "Reserving %ldMB of memory at %ldMB " | |
442 | "for crashkernel (System RAM: %ldMB)\n", | |
443 | (unsigned long)(crash_size >> 20), | |
444 | (unsigned long)(crash_base >> 20), | |
445 | (unsigned long)(total_mem >> 20)); | |
446 | ||
447 | crashk_res.start = crash_base; | |
448 | crashk_res.end = crash_base + crash_size - 1; | |
449 | insert_resource(&iomem_resource, &crashk_res); | |
450 | } | |
451 | } | |
452 | #else | |
29f784e3 | 453 | static void __init reserve_crashkernel(void) |
ccb4defa YL |
454 | { |
455 | } | |
456 | #endif | |
457 | ||
bdba0e70 YL |
458 | static struct resource standard_io_resources[] = { |
459 | { .name = "dma1", .start = 0x00, .end = 0x1f, | |
460 | .flags = IORESOURCE_BUSY | IORESOURCE_IO }, | |
461 | { .name = "pic1", .start = 0x20, .end = 0x21, | |
462 | .flags = IORESOURCE_BUSY | IORESOURCE_IO }, | |
463 | { .name = "timer0", .start = 0x40, .end = 0x43, | |
464 | .flags = IORESOURCE_BUSY | IORESOURCE_IO }, | |
465 | { .name = "timer1", .start = 0x50, .end = 0x53, | |
466 | .flags = IORESOURCE_BUSY | IORESOURCE_IO }, | |
467 | { .name = "keyboard", .start = 0x60, .end = 0x60, | |
468 | .flags = IORESOURCE_BUSY | IORESOURCE_IO }, | |
469 | { .name = "keyboard", .start = 0x64, .end = 0x64, | |
470 | .flags = IORESOURCE_BUSY | IORESOURCE_IO }, | |
471 | { .name = "dma page reg", .start = 0x80, .end = 0x8f, | |
472 | .flags = IORESOURCE_BUSY | IORESOURCE_IO }, | |
473 | { .name = "pic2", .start = 0xa0, .end = 0xa1, | |
474 | .flags = IORESOURCE_BUSY | IORESOURCE_IO }, | |
475 | { .name = "dma2", .start = 0xc0, .end = 0xdf, | |
476 | .flags = IORESOURCE_BUSY | IORESOURCE_IO }, | |
477 | { .name = "fpu", .start = 0xf0, .end = 0xff, | |
478 | .flags = IORESOURCE_BUSY | IORESOURCE_IO } | |
479 | }; | |
480 | ||
29f784e3 | 481 | static void __init reserve_standard_io_resources(void) |
bdba0e70 YL |
482 | { |
483 | int i; | |
484 | ||
485 | /* request I/O space for devices used on all i[345]86 PCs */ | |
486 | for (i = 0; i < ARRAY_SIZE(standard_io_resources); i++) | |
487 | request_resource(&ioport_resource, &standard_io_resources[i]); | |
488 | ||
489 | } | |
490 | ||
0196bcbb YL |
491 | #ifdef CONFIG_PROC_VMCORE |
492 | /* elfcorehdr= specifies the location of elf core header | |
493 | * stored by the crashed kernel. This option will be passed | |
494 | * by kexec loader to the capture kernel. | |
495 | */ | |
496 | static int __init setup_elfcorehdr(char *arg) | |
497 | { | |
498 | char *end; | |
499 | if (!arg) | |
500 | return -EINVAL; | |
501 | elfcorehdr_addr = memparse(arg, &end); | |
502 | return end > arg ? 0 : -EINVAL; | |
503 | } | |
504 | early_param("elfcorehdr", setup_elfcorehdr); | |
505 | #endif | |
506 | ||
1da177e4 LT |
507 | /* |
508 | * Determine if we were loaded by an EFI loader. If so, then we have also been | |
509 | * passed the efi memmap, systab, etc., so we should use these data structures | |
510 | * for initialization. Note, the efi init code path is determined by the | |
511 | * global efi_enabled. This allows the same kernel image to be used on existing | |
512 | * systems (with a traditional BIOS) as well as on EFI systems. | |
513 | */ | |
76934ed4 YL |
514 | /* |
515 | * setup_arch - architecture-specific boot-time initializations | |
516 | * | |
517 | * Note: On x86_64, fixmaps are ready for use even before this is called. | |
518 | */ | |
519 | ||
1da177e4 LT |
520 | void __init setup_arch(char **cmdline_p) |
521 | { | |
76934ed4 | 522 | #ifdef CONFIG_X86_32 |
1da177e4 LT |
523 | memcpy(&boot_cpu_data, &new_cpu_data, sizeof(new_cpu_data)); |
524 | pre_setup_arch_hook(); | |
525 | early_cpu_init(); | |
beacfaac | 526 | early_ioremap_init(); |
c45a707d | 527 | reserve_setup_data(); |
76934ed4 YL |
528 | #else |
529 | printk(KERN_INFO "Command line: %s\n", boot_command_line); | |
530 | #endif | |
1da177e4 | 531 | |
30c82645 PA |
532 | ROOT_DEV = old_decode_dev(boot_params.hdr.root_dev); |
533 | screen_info = boot_params.screen_info; | |
534 | edid_info = boot_params.edid_info; | |
76934ed4 | 535 | #ifdef CONFIG_X86_32 |
30c82645 PA |
536 | apm_info.bios = boot_params.apm_bios_info; |
537 | ist_info = boot_params.ist_info; | |
76934ed4 | 538 | if (boot_params.sys_desc_table.length != 0) { |
30c82645 PA |
539 | set_mca_bus(boot_params.sys_desc_table.table[3] & 0x2); |
540 | machine_id = boot_params.sys_desc_table.table[0]; | |
541 | machine_submodel_id = boot_params.sys_desc_table.table[1]; | |
542 | BIOS_revision = boot_params.sys_desc_table.table[2]; | |
1da177e4 | 543 | } |
76934ed4 YL |
544 | #endif |
545 | saved_video_mode = boot_params.hdr.vid_mode; | |
30c82645 | 546 | bootloader_type = boot_params.hdr.type_of_loader; |
1da177e4 LT |
547 | |
548 | #ifdef CONFIG_BLK_DEV_RAM | |
30c82645 PA |
549 | rd_image_start = boot_params.hdr.ram_size & RAMDISK_IMAGE_START_MASK; |
550 | rd_prompt = ((boot_params.hdr.ram_size & RAMDISK_PROMPT_FLAG) != 0); | |
551 | rd_doload = ((boot_params.hdr.ram_size & RAMDISK_LOAD_FLAG) != 0); | |
1da177e4 | 552 | #endif |
7465252e YL |
553 | #ifdef CONFIG_EFI |
554 | if (!strncmp((char *)&boot_params.efi_info.efi_loader_signature, | |
76934ed4 YL |
555 | #ifdef CONFIG_X86_32 |
556 | "EL32", | |
557 | #else | |
558 | "EL64", | |
559 | #endif | |
560 | 4)) { | |
7465252e YL |
561 | efi_enabled = 1; |
562 | efi_reserve_early(); | |
563 | } | |
564 | #endif | |
565 | ||
1da177e4 | 566 | ARCH_SETUP |
2215e69d | 567 | |
0dbfafa5 | 568 | setup_memory_map(); |
1da177e4 LT |
569 | copy_edd(); |
570 | ||
30c82645 | 571 | if (!boot_params.hdr.root_flags) |
1da177e4 LT |
572 | root_mountflags &= ~MS_RDONLY; |
573 | init_mm.start_code = (unsigned long) _text; | |
574 | init_mm.end_code = (unsigned long) _etext; | |
575 | init_mm.end_data = (unsigned long) _edata; | |
76934ed4 | 576 | #ifdef CONFIG_X86_32 |
1da177e4 | 577 | init_mm.brk = init_pg_tables_end + PAGE_OFFSET; |
76934ed4 YL |
578 | #else |
579 | init_mm.brk = (unsigned long) &_end; | |
580 | #endif | |
1da177e4 LT |
581 | |
582 | code_resource.start = virt_to_phys(_text); | |
583 | code_resource.end = virt_to_phys(_etext)-1; | |
584 | data_resource.start = virt_to_phys(_etext); | |
585 | data_resource.end = virt_to_phys(_edata)-1; | |
00bf4098 BW |
586 | bss_resource.start = virt_to_phys(&__bss_start); |
587 | bss_resource.end = virt_to_phys(&__bss_stop)-1; | |
1da177e4 | 588 | |
76934ed4 YL |
589 | #ifdef CONFIG_X86_64 |
590 | early_cpu_init(); | |
591 | #endif | |
9a2e5930 YL |
592 | strlcpy(command_line, boot_command_line, COMMAND_LINE_SIZE); |
593 | *cmdline_p = command_line; | |
594 | ||
c45a707d HY |
595 | parse_setup_data(); |
596 | ||
1a3f239d | 597 | parse_early_param(); |
1da177e4 | 598 | |
76934ed4 | 599 | if (acpi_mps_check()) { |
3eb11edc | 600 | #ifdef CONFIG_X86_LOCAL_APIC |
76934ed4 | 601 | #ifdef CONFIG_X86_32 |
3c999f14 | 602 | enable_local_apic = -1; |
76934ed4 YL |
603 | #else |
604 | disable_apic = 1; | |
605 | #endif | |
3eb11edc | 606 | #endif |
3c999f14 YL |
607 | clear_cpu_cap(&boot_cpu_data, X86_FEATURE_APIC); |
608 | } | |
609 | ||
0dbfafa5 | 610 | finish_e820_parsing(); |
1a3f239d | 611 | |
76934ed4 | 612 | #ifdef CONFIG_X86_32 |
41c094fd | 613 | probe_roms(); |
76934ed4 | 614 | #endif |
41c094fd YL |
615 | |
616 | /* after parse_early_param, so could debug it */ | |
617 | insert_resource(&iomem_resource, &code_resource); | |
618 | insert_resource(&iomem_resource, &data_resource); | |
619 | insert_resource(&iomem_resource, &bss_resource); | |
620 | ||
8b2cb7a8 HY |
621 | if (efi_enabled) |
622 | efi_init(); | |
623 | ||
76934ed4 | 624 | #ifdef CONFIG_X86_32 |
cc9f7a0c YL |
625 | if (ppro_with_ram_bug()) { |
626 | e820_update_range(0x70000000ULL, 0x40000ULL, E820_RAM, | |
627 | E820_RESERVED); | |
628 | sanitize_e820_map(e820.map, ARRAY_SIZE(e820.map), &e820.nr_map); | |
629 | printk(KERN_INFO "fixed physical RAM map:\n"); | |
630 | e820_print_map("bad_ppro"); | |
631 | } | |
76934ed4 YL |
632 | #else |
633 | early_gart_iommu_check(); | |
634 | #endif | |
cc9f7a0c | 635 | |
7b2a0a6c YL |
636 | e820_register_active_regions(0, 0, -1UL); |
637 | /* | |
638 | * partially used pages are not usable - thus | |
639 | * we are rounding upwards: | |
640 | */ | |
641 | max_pfn = e820_end_of_ram(); | |
642 | ||
6780711e YL |
643 | /* preallocate 4k for mptable mpc */ |
644 | early_reserve_e820_mpc_new(); | |
093af8d7 YL |
645 | /* update e820 for memory not covered by WB MTRRs */ |
646 | mtrr_bp_init(); | |
7b2a0a6c YL |
647 | if (mtrr_trim_uncached_memory(max_pfn)) { |
648 | remove_all_active_ranges(); | |
649 | e820_register_active_regions(0, 0, -1UL); | |
650 | max_pfn = e820_end_of_ram(); | |
651 | } | |
76c32418 | 652 | |
76934ed4 | 653 | #ifdef CONFIG_X86_32 |
4e29684c | 654 | /* max_low_pfn get updated here */ |
2ec65f8b | 655 | find_low_pfn_range(); |
76934ed4 YL |
656 | #else |
657 | num_physpages = max_pfn; | |
658 | ||
659 | check_efer(); | |
660 | ||
661 | /* How many end-of-memory variables you have, grandma! */ | |
662 | /* need this before calling reserve_initrd */ | |
663 | max_low_pfn = max_pfn; | |
664 | high_memory = (void *)__va(max_pfn * PAGE_SIZE - 1) + 1; | |
665 | #endif | |
2ec65f8b | 666 | |
4e29684c | 667 | /* max_pfn_mapped is updated here */ |
b9d19f4a | 668 | max_pfn_mapped = init_memory_mapping(0, (max_low_pfn << PAGE_SHIFT)); |
4e29684c | 669 | |
e7b37895 YL |
670 | /* |
671 | * NOTE: On x86-32, only from this point on, fixmaps are ready for use. | |
672 | */ | |
673 | ||
674 | #ifdef CONFIG_PROVIDE_OHCI1394_DMA_INIT | |
675 | if (init_ohci1394_dma_early) | |
676 | init_ohci1394_dma_on_all_controllers(); | |
677 | #endif | |
678 | ||
2ec65f8b YL |
679 | reserve_initrd(); |
680 | ||
76934ed4 YL |
681 | #ifdef CONFIG_X86_64 |
682 | vsmp_init(); | |
683 | #endif | |
684 | ||
1c6e5503 YL |
685 | dmi_scan_machine(); |
686 | ||
687 | io_delay_init(); | |
688 | ||
1c6e5503 YL |
689 | /* |
690 | * Parse the ACPI tables for possible boot-time SMP configuration. | |
691 | */ | |
692 | acpi_boot_table_init(); | |
1c6e5503 | 693 | |
76934ed4 YL |
694 | #ifdef CONFIG_X86_64 |
695 | /* Remove active ranges so rediscovery with NUMA-awareness happens */ | |
696 | remove_all_active_ranges(); | |
697 | #endif | |
698 | ||
1c6e5503 | 699 | #ifdef CONFIG_ACPI_NUMA |
f2f865fe YL |
700 | /* |
701 | * Parse SRAT to discover nodes. | |
702 | */ | |
703 | acpi_numa_init(); | |
1c6e5503 YL |
704 | #endif |
705 | ||
2ec65f8b | 706 | initmem_init(0, max_pfn); |
093af8d7 | 707 | |
76934ed4 YL |
708 | #ifdef CONFIG_X86_64 |
709 | dma32_reserve_bootmem(); | |
710 | #endif | |
711 | ||
593a0cc3 YL |
712 | #ifdef CONFIG_ACPI_SLEEP |
713 | /* | |
714 | * Reserve low memory region for sleep support. | |
715 | */ | |
716 | acpi_reserve_bootmem(); | |
717 | #endif | |
d1b20afe | 718 | #ifdef CONFIG_X86_FIND_SMP_CONFIG |
593a0cc3 YL |
719 | /* |
720 | * Find and reserve possible boot-time SMP configuration: | |
721 | */ | |
722 | find_smp_config(); | |
723 | #endif | |
724 | reserve_crashkernel(); | |
725 | ||
726 | reserve_ibft_region(); | |
727 | ||
790c73f6 GOC |
728 | #ifdef CONFIG_KVM_CLOCK |
729 | kvmclock_init(); | |
730 | #endif | |
731 | ||
76934ed4 | 732 | #if defined(CONFIG_VMI) && defined(CONFIG_X86_32) |
7ce0bcfd ZA |
733 | /* |
734 | * Must be after max_low_pfn is determined, and before kernel | |
735 | * pagetables are setup. | |
736 | */ | |
737 | vmi_init(); | |
738 | #endif | |
1da177e4 | 739 | |
1da177e4 | 740 | paging_init(); |
f212ec4b | 741 | |
76934ed4 YL |
742 | #ifdef CONFIG_X86_64 |
743 | map_vsyscall(); | |
744 | #endif | |
745 | ||
1da177e4 | 746 | #ifdef CONFIG_X86_GENERICARCH |
1a3f239d | 747 | generic_apic_probe(); |
cf8fa920 | 748 | #endif |
1da177e4 | 749 | |
54ef3400 | 750 | early_quirks(); |
d44647b0 | 751 | |
295deae4 YL |
752 | /* |
753 | * Read APIC and some other early information from ACPI tables. | |
754 | */ | |
1da177e4 | 755 | acpi_boot_init(); |
04606618 | 756 | |
76934ed4 YL |
757 | #ifdef CONFIG_X86_64 |
758 | init_cpu_to_node(); | |
759 | #endif | |
760 | ||
e0da3364 | 761 | #if defined(CONFIG_X86_MPPARSE) || defined(CONFIG_X86_VISWS) |
295deae4 YL |
762 | /* |
763 | * get boot-time SMP configuration: | |
764 | */ | |
e0da3364 YL |
765 | if (smp_found_config) |
766 | get_smp_config(); | |
767 | #endif | |
76934ed4 YL |
768 | |
769 | #ifdef CONFIG_X86_64 | |
770 | init_apic_mappings(); | |
771 | ioapic_init_mappings(); | |
772 | #else | |
773 | # if defined(CONFIG_SMP) && defined(CONFIG_X86_PC) | |
911a62d4 VP |
774 | if (def_to_bigsmp) |
775 | printk(KERN_WARNING "More than 8 CPUs detected and " | |
776 | "CONFIG_X86_PC cannot handle it.\nUse " | |
777 | "CONFIG_X86_GENERICARCH or CONFIG_X86_BIGSMP.\n"); | |
76934ed4 | 778 | # endif |
911a62d4 | 779 | #endif |
295deae4 | 780 | kvm_guest_init(); |
1da177e4 | 781 | |
41c094fd | 782 | e820_reserve_resources(); |
bf62f398 | 783 | e820_mark_nosave_regions(max_low_pfn); |
1da177e4 | 784 | |
76934ed4 | 785 | #ifdef CONFIG_X86_32 |
41c094fd | 786 | request_resource(&iomem_resource, &video_ram_resource); |
76934ed4 | 787 | #endif |
ce97c40e | 788 | reserve_standard_io_resources(); |
41c094fd YL |
789 | |
790 | e820_setup_gap(); | |
791 | ||
1da177e4 LT |
792 | #ifdef CONFIG_VT |
793 | #if defined(CONFIG_VGA_CONSOLE) | |
794 | if (!efi_enabled || (efi_mem_type(0xa0000) != EFI_CONVENTIONAL_MEMORY)) | |
795 | conswitchp = &vga_con; | |
796 | #elif defined(CONFIG_DUMMY_CONSOLE) | |
797 | conswitchp = &dummy_con; | |
798 | #endif | |
799 | #endif | |
800 | } |