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1da177e4 LT |
1 | /* |
2 | * linux/arch/x86-64/kernel/setup.c | |
3 | * | |
4 | * Copyright (C) 1995 Linus Torvalds | |
5 | * | |
6 | * Nov 2001 Dave Jones <davej@suse.de> | |
7 | * Forked from i386 setup code. | |
8 | * | |
9 | * $Id$ | |
10 | */ | |
11 | ||
12 | /* | |
13 | * This file handles the architecture-dependent parts of initialization | |
14 | */ | |
15 | ||
16 | #include <linux/errno.h> | |
17 | #include <linux/sched.h> | |
18 | #include <linux/kernel.h> | |
19 | #include <linux/mm.h> | |
20 | #include <linux/stddef.h> | |
21 | #include <linux/unistd.h> | |
22 | #include <linux/ptrace.h> | |
23 | #include <linux/slab.h> | |
24 | #include <linux/user.h> | |
25 | #include <linux/a.out.h> | |
26 | #include <linux/tty.h> | |
27 | #include <linux/ioport.h> | |
28 | #include <linux/delay.h> | |
29 | #include <linux/config.h> | |
30 | #include <linux/init.h> | |
31 | #include <linux/initrd.h> | |
32 | #include <linux/highmem.h> | |
33 | #include <linux/bootmem.h> | |
34 | #include <linux/module.h> | |
35 | #include <asm/processor.h> | |
36 | #include <linux/console.h> | |
37 | #include <linux/seq_file.h> | |
aac04b32 | 38 | #include <linux/crash_dump.h> |
1da177e4 LT |
39 | #include <linux/root_dev.h> |
40 | #include <linux/pci.h> | |
41 | #include <linux/acpi.h> | |
42 | #include <linux/kallsyms.h> | |
43 | #include <linux/edd.h> | |
bbfceef4 | 44 | #include <linux/mmzone.h> |
5f5609df | 45 | #include <linux/kexec.h> |
95235ca2 | 46 | #include <linux/cpufreq.h> |
e9928674 | 47 | #include <linux/dmi.h> |
bbfceef4 | 48 | |
1da177e4 LT |
49 | #include <asm/mtrr.h> |
50 | #include <asm/uaccess.h> | |
51 | #include <asm/system.h> | |
52 | #include <asm/io.h> | |
53 | #include <asm/smp.h> | |
54 | #include <asm/msr.h> | |
55 | #include <asm/desc.h> | |
56 | #include <video/edid.h> | |
57 | #include <asm/e820.h> | |
58 | #include <asm/dma.h> | |
59 | #include <asm/mpspec.h> | |
60 | #include <asm/mmu_context.h> | |
61 | #include <asm/bootsetup.h> | |
62 | #include <asm/proto.h> | |
63 | #include <asm/setup.h> | |
64 | #include <asm/mach_apic.h> | |
65 | #include <asm/numa.h> | |
2bc0414e | 66 | #include <asm/sections.h> |
1da177e4 LT |
67 | |
68 | /* | |
69 | * Machine setup.. | |
70 | */ | |
71 | ||
6c231b7b | 72 | struct cpuinfo_x86 boot_cpu_data __read_mostly; |
1da177e4 LT |
73 | |
74 | unsigned long mmu_cr4_features; | |
75 | ||
76 | int acpi_disabled; | |
77 | EXPORT_SYMBOL(acpi_disabled); | |
888ba6c6 | 78 | #ifdef CONFIG_ACPI |
1da177e4 LT |
79 | extern int __initdata acpi_ht; |
80 | extern acpi_interrupt_flags acpi_sci_flags; | |
81 | int __initdata acpi_force = 0; | |
82 | #endif | |
83 | ||
84 | int acpi_numa __initdata; | |
85 | ||
1da177e4 LT |
86 | /* Boot loader ID as an integer, for the benefit of proc_dointvec */ |
87 | int bootloader_type; | |
88 | ||
89 | unsigned long saved_video_mode; | |
90 | ||
91 | #ifdef CONFIG_SWIOTLB | |
92 | int swiotlb; | |
93 | EXPORT_SYMBOL(swiotlb); | |
94 | #endif | |
95 | ||
96 | /* | |
97 | * Setup options | |
98 | */ | |
99 | struct drive_info_struct { char dummy[32]; } drive_info; | |
100 | struct screen_info screen_info; | |
101 | struct sys_desc_table_struct { | |
102 | unsigned short length; | |
103 | unsigned char table[0]; | |
104 | }; | |
105 | ||
106 | struct edid_info edid_info; | |
107 | struct e820map e820; | |
108 | ||
109 | extern int root_mountflags; | |
1da177e4 LT |
110 | |
111 | char command_line[COMMAND_LINE_SIZE]; | |
112 | ||
113 | struct resource standard_io_resources[] = { | |
114 | { .name = "dma1", .start = 0x00, .end = 0x1f, | |
115 | .flags = IORESOURCE_BUSY | IORESOURCE_IO }, | |
116 | { .name = "pic1", .start = 0x20, .end = 0x21, | |
117 | .flags = IORESOURCE_BUSY | IORESOURCE_IO }, | |
118 | { .name = "timer0", .start = 0x40, .end = 0x43, | |
119 | .flags = IORESOURCE_BUSY | IORESOURCE_IO }, | |
120 | { .name = "timer1", .start = 0x50, .end = 0x53, | |
121 | .flags = IORESOURCE_BUSY | IORESOURCE_IO }, | |
122 | { .name = "keyboard", .start = 0x60, .end = 0x6f, | |
123 | .flags = IORESOURCE_BUSY | IORESOURCE_IO }, | |
124 | { .name = "dma page reg", .start = 0x80, .end = 0x8f, | |
125 | .flags = IORESOURCE_BUSY | IORESOURCE_IO }, | |
126 | { .name = "pic2", .start = 0xa0, .end = 0xa1, | |
127 | .flags = IORESOURCE_BUSY | IORESOURCE_IO }, | |
128 | { .name = "dma2", .start = 0xc0, .end = 0xdf, | |
129 | .flags = IORESOURCE_BUSY | IORESOURCE_IO }, | |
130 | { .name = "fpu", .start = 0xf0, .end = 0xff, | |
131 | .flags = IORESOURCE_BUSY | IORESOURCE_IO } | |
132 | }; | |
133 | ||
134 | #define STANDARD_IO_RESOURCES \ | |
135 | (sizeof standard_io_resources / sizeof standard_io_resources[0]) | |
136 | ||
137 | #define IORESOURCE_RAM (IORESOURCE_BUSY | IORESOURCE_MEM) | |
138 | ||
139 | struct resource data_resource = { | |
140 | .name = "Kernel data", | |
141 | .start = 0, | |
142 | .end = 0, | |
143 | .flags = IORESOURCE_RAM, | |
144 | }; | |
145 | struct resource code_resource = { | |
146 | .name = "Kernel code", | |
147 | .start = 0, | |
148 | .end = 0, | |
149 | .flags = IORESOURCE_RAM, | |
150 | }; | |
151 | ||
152 | #define IORESOURCE_ROM (IORESOURCE_BUSY | IORESOURCE_READONLY | IORESOURCE_MEM) | |
153 | ||
154 | static struct resource system_rom_resource = { | |
155 | .name = "System ROM", | |
156 | .start = 0xf0000, | |
157 | .end = 0xfffff, | |
158 | .flags = IORESOURCE_ROM, | |
159 | }; | |
160 | ||
161 | static struct resource extension_rom_resource = { | |
162 | .name = "Extension ROM", | |
163 | .start = 0xe0000, | |
164 | .end = 0xeffff, | |
165 | .flags = IORESOURCE_ROM, | |
166 | }; | |
167 | ||
168 | static struct resource adapter_rom_resources[] = { | |
169 | { .name = "Adapter ROM", .start = 0xc8000, .end = 0, | |
170 | .flags = IORESOURCE_ROM }, | |
171 | { .name = "Adapter ROM", .start = 0, .end = 0, | |
172 | .flags = IORESOURCE_ROM }, | |
173 | { .name = "Adapter ROM", .start = 0, .end = 0, | |
174 | .flags = IORESOURCE_ROM }, | |
175 | { .name = "Adapter ROM", .start = 0, .end = 0, | |
176 | .flags = IORESOURCE_ROM }, | |
177 | { .name = "Adapter ROM", .start = 0, .end = 0, | |
178 | .flags = IORESOURCE_ROM }, | |
179 | { .name = "Adapter ROM", .start = 0, .end = 0, | |
180 | .flags = IORESOURCE_ROM } | |
181 | }; | |
182 | ||
183 | #define ADAPTER_ROM_RESOURCES \ | |
184 | (sizeof adapter_rom_resources / sizeof adapter_rom_resources[0]) | |
185 | ||
186 | static struct resource video_rom_resource = { | |
187 | .name = "Video ROM", | |
188 | .start = 0xc0000, | |
189 | .end = 0xc7fff, | |
190 | .flags = IORESOURCE_ROM, | |
191 | }; | |
192 | ||
193 | static struct resource video_ram_resource = { | |
194 | .name = "Video RAM area", | |
195 | .start = 0xa0000, | |
196 | .end = 0xbffff, | |
197 | .flags = IORESOURCE_RAM, | |
198 | }; | |
199 | ||
200 | #define romsignature(x) (*(unsigned short *)(x) == 0xaa55) | |
201 | ||
202 | static int __init romchecksum(unsigned char *rom, unsigned long length) | |
203 | { | |
204 | unsigned char *p, sum = 0; | |
205 | ||
206 | for (p = rom; p < rom + length; p++) | |
207 | sum += *p; | |
208 | return sum == 0; | |
209 | } | |
210 | ||
211 | static void __init probe_roms(void) | |
212 | { | |
213 | unsigned long start, length, upper; | |
214 | unsigned char *rom; | |
215 | int i; | |
216 | ||
217 | /* video rom */ | |
218 | upper = adapter_rom_resources[0].start; | |
219 | for (start = video_rom_resource.start; start < upper; start += 2048) { | |
220 | rom = isa_bus_to_virt(start); | |
221 | if (!romsignature(rom)) | |
222 | continue; | |
223 | ||
224 | video_rom_resource.start = start; | |
225 | ||
226 | /* 0 < length <= 0x7f * 512, historically */ | |
227 | length = rom[2] * 512; | |
228 | ||
229 | /* if checksum okay, trust length byte */ | |
230 | if (length && romchecksum(rom, length)) | |
231 | video_rom_resource.end = start + length - 1; | |
232 | ||
233 | request_resource(&iomem_resource, &video_rom_resource); | |
234 | break; | |
235 | } | |
236 | ||
237 | start = (video_rom_resource.end + 1 + 2047) & ~2047UL; | |
238 | if (start < upper) | |
239 | start = upper; | |
240 | ||
241 | /* system rom */ | |
242 | request_resource(&iomem_resource, &system_rom_resource); | |
243 | upper = system_rom_resource.start; | |
244 | ||
245 | /* check for extension rom (ignore length byte!) */ | |
246 | rom = isa_bus_to_virt(extension_rom_resource.start); | |
247 | if (romsignature(rom)) { | |
248 | length = extension_rom_resource.end - extension_rom_resource.start + 1; | |
249 | if (romchecksum(rom, length)) { | |
250 | request_resource(&iomem_resource, &extension_rom_resource); | |
251 | upper = extension_rom_resource.start; | |
252 | } | |
253 | } | |
254 | ||
255 | /* check for adapter roms on 2k boundaries */ | |
256 | for (i = 0; i < ADAPTER_ROM_RESOURCES && start < upper; start += 2048) { | |
257 | rom = isa_bus_to_virt(start); | |
258 | if (!romsignature(rom)) | |
259 | continue; | |
260 | ||
261 | /* 0 < length <= 0x7f * 512, historically */ | |
262 | length = rom[2] * 512; | |
263 | ||
264 | /* but accept any length that fits if checksum okay */ | |
265 | if (!length || start + length > upper || !romchecksum(rom, length)) | |
266 | continue; | |
267 | ||
268 | adapter_rom_resources[i].start = start; | |
269 | adapter_rom_resources[i].end = start + length - 1; | |
270 | request_resource(&iomem_resource, &adapter_rom_resources[i]); | |
271 | ||
272 | start = adapter_rom_resources[i++].end & ~2047UL; | |
273 | } | |
274 | } | |
275 | ||
276 | static __init void parse_cmdline_early (char ** cmdline_p) | |
277 | { | |
278 | char c = ' ', *to = command_line, *from = COMMAND_LINE; | |
279 | int len = 0; | |
69cda7b1 | 280 | int userdef = 0; |
1da177e4 LT |
281 | |
282 | /* Save unparsed command line copy for /proc/cmdline */ | |
283 | memcpy(saved_command_line, COMMAND_LINE, COMMAND_LINE_SIZE); | |
284 | saved_command_line[COMMAND_LINE_SIZE-1] = '\0'; | |
285 | ||
286 | for (;;) { | |
287 | if (c != ' ') | |
288 | goto next_char; | |
289 | ||
290 | #ifdef CONFIG_SMP | |
291 | /* | |
292 | * If the BIOS enumerates physical processors before logical, | |
293 | * maxcpus=N at enumeration-time can be used to disable HT. | |
294 | */ | |
295 | else if (!memcmp(from, "maxcpus=", 8)) { | |
296 | extern unsigned int maxcpus; | |
297 | ||
298 | maxcpus = simple_strtoul(from + 8, NULL, 0); | |
299 | } | |
300 | #endif | |
888ba6c6 | 301 | #ifdef CONFIG_ACPI |
1da177e4 LT |
302 | /* "acpi=off" disables both ACPI table parsing and interpreter init */ |
303 | if (!memcmp(from, "acpi=off", 8)) | |
304 | disable_acpi(); | |
305 | ||
306 | if (!memcmp(from, "acpi=force", 10)) { | |
307 | /* add later when we do DMI horrors: */ | |
308 | acpi_force = 1; | |
309 | acpi_disabled = 0; | |
310 | } | |
311 | ||
312 | /* acpi=ht just means: do ACPI MADT parsing | |
313 | at bootup, but don't enable the full ACPI interpreter */ | |
314 | if (!memcmp(from, "acpi=ht", 7)) { | |
315 | if (!acpi_force) | |
316 | disable_acpi(); | |
317 | acpi_ht = 1; | |
318 | } | |
319 | else if (!memcmp(from, "pci=noacpi", 10)) | |
320 | acpi_disable_pci(); | |
321 | else if (!memcmp(from, "acpi=noirq", 10)) | |
322 | acpi_noirq_set(); | |
323 | ||
324 | else if (!memcmp(from, "acpi_sci=edge", 13)) | |
325 | acpi_sci_flags.trigger = 1; | |
326 | else if (!memcmp(from, "acpi_sci=level", 14)) | |
327 | acpi_sci_flags.trigger = 3; | |
328 | else if (!memcmp(from, "acpi_sci=high", 13)) | |
329 | acpi_sci_flags.polarity = 1; | |
330 | else if (!memcmp(from, "acpi_sci=low", 12)) | |
331 | acpi_sci_flags.polarity = 3; | |
332 | ||
333 | /* acpi=strict disables out-of-spec workarounds */ | |
334 | else if (!memcmp(from, "acpi=strict", 11)) { | |
335 | acpi_strict = 1; | |
336 | } | |
22999244 AK |
337 | #ifdef CONFIG_X86_IO_APIC |
338 | else if (!memcmp(from, "acpi_skip_timer_override", 24)) | |
339 | acpi_skip_timer_override = 1; | |
340 | #endif | |
1da177e4 LT |
341 | #endif |
342 | ||
66759a01 CE |
343 | if (!memcmp(from, "disable_timer_pin_1", 19)) |
344 | disable_timer_pin_1 = 1; | |
345 | if (!memcmp(from, "enable_timer_pin_1", 18)) | |
346 | disable_timer_pin_1 = -1; | |
347 | ||
1da177e4 LT |
348 | if (!memcmp(from, "nolapic", 7) || |
349 | !memcmp(from, "disableapic", 11)) | |
350 | disable_apic = 1; | |
351 | ||
352 | if (!memcmp(from, "noapic", 6)) | |
353 | skip_ioapic_setup = 1; | |
354 | ||
ed8388a5 AK |
355 | /* Make sure to not confuse with apic= */ |
356 | if (!memcmp(from, "apic", 4) && | |
357 | (from[4] == ' ' || from[4] == 0)) { | |
1da177e4 LT |
358 | skip_ioapic_setup = 0; |
359 | ioapic_force = 1; | |
360 | } | |
361 | ||
362 | if (!memcmp(from, "mem=", 4)) | |
363 | parse_memopt(from+4, &from); | |
364 | ||
69cda7b1 | 365 | if (!memcmp(from, "memmap=", 7)) { |
366 | /* exactmap option is for used defined memory */ | |
367 | if (!memcmp(from+7, "exactmap", 8)) { | |
368 | #ifdef CONFIG_CRASH_DUMP | |
369 | /* If we are doing a crash dump, we | |
370 | * still need to know the real mem | |
371 | * size before original memory map is | |
372 | * reset. | |
373 | */ | |
374 | saved_max_pfn = e820_end_of_ram(); | |
375 | #endif | |
376 | from += 8+7; | |
377 | end_pfn_map = 0; | |
378 | e820.nr_map = 0; | |
379 | userdef = 1; | |
380 | } | |
381 | else { | |
382 | parse_memmapopt(from+7, &from); | |
383 | userdef = 1; | |
384 | } | |
385 | } | |
386 | ||
2b97690f | 387 | #ifdef CONFIG_NUMA |
1da177e4 LT |
388 | if (!memcmp(from, "numa=", 5)) |
389 | numa_setup(from+5); | |
390 | #endif | |
391 | ||
392 | #ifdef CONFIG_GART_IOMMU | |
393 | if (!memcmp(from,"iommu=",6)) { | |
394 | iommu_setup(from+6); | |
395 | } | |
396 | #endif | |
397 | ||
398 | if (!memcmp(from,"oops=panic", 10)) | |
399 | panic_on_oops = 1; | |
400 | ||
401 | if (!memcmp(from, "noexec=", 7)) | |
402 | nonx_setup(from + 7); | |
403 | ||
5f5609df EB |
404 | #ifdef CONFIG_KEXEC |
405 | /* crashkernel=size@addr specifies the location to reserve for | |
406 | * a crash kernel. By reserving this memory we guarantee | |
407 | * that linux never set's it up as a DMA target. | |
408 | * Useful for holding code to do something appropriate | |
409 | * after a kernel panic. | |
410 | */ | |
411 | else if (!memcmp(from, "crashkernel=", 12)) { | |
412 | unsigned long size, base; | |
413 | size = memparse(from+12, &from); | |
414 | if (*from == '@') { | |
415 | base = memparse(from+1, &from); | |
416 | /* FIXME: Do I want a sanity check | |
417 | * to validate the memory range? | |
418 | */ | |
419 | crashk_res.start = base; | |
420 | crashk_res.end = base + size - 1; | |
421 | } | |
422 | } | |
423 | #endif | |
424 | ||
aac04b32 VG |
425 | #ifdef CONFIG_PROC_VMCORE |
426 | /* elfcorehdr= specifies the location of elf core header | |
427 | * stored by the crashed kernel. This option will be passed | |
428 | * by kexec loader to the capture kernel. | |
429 | */ | |
430 | else if(!memcmp(from, "elfcorehdr=", 11)) | |
431 | elfcorehdr_addr = memparse(from+11, &from); | |
432 | #endif | |
1da177e4 LT |
433 | next_char: |
434 | c = *(from++); | |
435 | if (!c) | |
436 | break; | |
437 | if (COMMAND_LINE_SIZE <= ++len) | |
438 | break; | |
439 | *(to++) = c; | |
440 | } | |
69cda7b1 | 441 | if (userdef) { |
442 | printk(KERN_INFO "user-defined physical RAM map:\n"); | |
443 | e820_print_map("user"); | |
444 | } | |
1da177e4 LT |
445 | *to = '\0'; |
446 | *cmdline_p = command_line; | |
447 | } | |
448 | ||
2b97690f | 449 | #ifndef CONFIG_NUMA |
bbfceef4 MT |
450 | static void __init |
451 | contig_initmem_init(unsigned long start_pfn, unsigned long end_pfn) | |
1da177e4 | 452 | { |
bbfceef4 MT |
453 | unsigned long bootmap_size, bootmap; |
454 | ||
bbfceef4 MT |
455 | bootmap_size = bootmem_bootmap_pages(end_pfn)<<PAGE_SHIFT; |
456 | bootmap = find_e820_area(0, end_pfn<<PAGE_SHIFT, bootmap_size); | |
457 | if (bootmap == -1L) | |
458 | panic("Cannot find bootmem map of size %ld\n",bootmap_size); | |
459 | bootmap_size = init_bootmem(bootmap >> PAGE_SHIFT, end_pfn); | |
460 | e820_bootmem_free(NODE_DATA(0), 0, end_pfn << PAGE_SHIFT); | |
461 | reserve_bootmem(bootmap, bootmap_size); | |
1da177e4 LT |
462 | } |
463 | #endif | |
464 | ||
465 | /* Use inline assembly to define this because the nops are defined | |
466 | as inline assembly strings in the include files and we cannot | |
467 | get them easily into strings. */ | |
468 | asm("\t.data\nk8nops: " | |
469 | K8_NOP1 K8_NOP2 K8_NOP3 K8_NOP4 K8_NOP5 K8_NOP6 | |
470 | K8_NOP7 K8_NOP8); | |
471 | ||
472 | extern unsigned char k8nops[]; | |
473 | static unsigned char *k8_nops[ASM_NOP_MAX+1] = { | |
474 | NULL, | |
475 | k8nops, | |
476 | k8nops + 1, | |
477 | k8nops + 1 + 2, | |
478 | k8nops + 1 + 2 + 3, | |
479 | k8nops + 1 + 2 + 3 + 4, | |
480 | k8nops + 1 + 2 + 3 + 4 + 5, | |
481 | k8nops + 1 + 2 + 3 + 4 + 5 + 6, | |
482 | k8nops + 1 + 2 + 3 + 4 + 5 + 6 + 7, | |
483 | }; | |
484 | ||
485 | /* Replace instructions with better alternatives for this CPU type. | |
486 | ||
487 | This runs before SMP is initialized to avoid SMP problems with | |
488 | self modifying code. This implies that assymetric systems where | |
489 | APs have less capabilities than the boot processor are not handled. | |
490 | In this case boot with "noreplacement". */ | |
491 | void apply_alternatives(void *start, void *end) | |
492 | { | |
493 | struct alt_instr *a; | |
494 | int diff, i, k; | |
495 | for (a = start; (void *)a < end; a++) { | |
496 | if (!boot_cpu_has(a->cpuid)) | |
497 | continue; | |
498 | ||
499 | BUG_ON(a->replacementlen > a->instrlen); | |
500 | __inline_memcpy(a->instr, a->replacement, a->replacementlen); | |
501 | diff = a->instrlen - a->replacementlen; | |
502 | ||
503 | /* Pad the rest with nops */ | |
504 | for (i = a->replacementlen; diff > 0; diff -= k, i += k) { | |
505 | k = diff; | |
506 | if (k > ASM_NOP_MAX) | |
507 | k = ASM_NOP_MAX; | |
508 | __inline_memcpy(a->instr + i, k8_nops[k], k); | |
509 | } | |
510 | } | |
511 | } | |
512 | ||
513 | static int no_replacement __initdata = 0; | |
514 | ||
515 | void __init alternative_instructions(void) | |
516 | { | |
517 | extern struct alt_instr __alt_instructions[], __alt_instructions_end[]; | |
518 | if (no_replacement) | |
519 | return; | |
520 | apply_alternatives(__alt_instructions, __alt_instructions_end); | |
521 | } | |
522 | ||
523 | static int __init noreplacement_setup(char *s) | |
524 | { | |
525 | no_replacement = 1; | |
526 | return 0; | |
527 | } | |
528 | ||
529 | __setup("noreplacement", noreplacement_setup); | |
530 | ||
531 | #if defined(CONFIG_EDD) || defined(CONFIG_EDD_MODULE) | |
532 | struct edd edd; | |
533 | #ifdef CONFIG_EDD_MODULE | |
534 | EXPORT_SYMBOL(edd); | |
535 | #endif | |
536 | /** | |
537 | * copy_edd() - Copy the BIOS EDD information | |
538 | * from boot_params into a safe place. | |
539 | * | |
540 | */ | |
541 | static inline void copy_edd(void) | |
542 | { | |
543 | memcpy(edd.mbr_signature, EDD_MBR_SIGNATURE, sizeof(edd.mbr_signature)); | |
544 | memcpy(edd.edd_info, EDD_BUF, sizeof(edd.edd_info)); | |
545 | edd.mbr_signature_nr = EDD_MBR_SIG_NR; | |
546 | edd.edd_info_nr = EDD_NR; | |
547 | } | |
548 | #else | |
549 | static inline void copy_edd(void) | |
550 | { | |
551 | } | |
552 | #endif | |
553 | ||
554 | #define EBDA_ADDR_POINTER 0x40E | |
555 | static void __init reserve_ebda_region(void) | |
556 | { | |
557 | unsigned int addr; | |
558 | /** | |
559 | * there is a real-mode segmented pointer pointing to the | |
560 | * 4K EBDA area at 0x40E | |
561 | */ | |
562 | addr = *(unsigned short *)phys_to_virt(EBDA_ADDR_POINTER); | |
563 | addr <<= 4; | |
564 | if (addr) | |
565 | reserve_bootmem_generic(addr, PAGE_SIZE); | |
566 | } | |
567 | ||
568 | void __init setup_arch(char **cmdline_p) | |
569 | { | |
1da177e4 LT |
570 | unsigned long kernel_end; |
571 | ||
572 | ROOT_DEV = old_decode_dev(ORIG_ROOT_DEV); | |
573 | drive_info = DRIVE_INFO; | |
574 | screen_info = SCREEN_INFO; | |
575 | edid_info = EDID_INFO; | |
576 | saved_video_mode = SAVED_VIDEO_MODE; | |
577 | bootloader_type = LOADER_TYPE; | |
578 | ||
579 | #ifdef CONFIG_BLK_DEV_RAM | |
580 | rd_image_start = RAMDISK_FLAGS & RAMDISK_IMAGE_START_MASK; | |
581 | rd_prompt = ((RAMDISK_FLAGS & RAMDISK_PROMPT_FLAG) != 0); | |
582 | rd_doload = ((RAMDISK_FLAGS & RAMDISK_LOAD_FLAG) != 0); | |
583 | #endif | |
584 | setup_memory_region(); | |
585 | copy_edd(); | |
586 | ||
587 | if (!MOUNT_ROOT_RDONLY) | |
588 | root_mountflags &= ~MS_RDONLY; | |
589 | init_mm.start_code = (unsigned long) &_text; | |
590 | init_mm.end_code = (unsigned long) &_etext; | |
591 | init_mm.end_data = (unsigned long) &_edata; | |
592 | init_mm.brk = (unsigned long) &_end; | |
593 | ||
594 | code_resource.start = virt_to_phys(&_text); | |
595 | code_resource.end = virt_to_phys(&_etext)-1; | |
596 | data_resource.start = virt_to_phys(&_etext); | |
597 | data_resource.end = virt_to_phys(&_edata)-1; | |
598 | ||
599 | parse_cmdline_early(cmdline_p); | |
600 | ||
601 | early_identify_cpu(&boot_cpu_data); | |
602 | ||
603 | /* | |
604 | * partially used pages are not usable - thus | |
605 | * we are rounding upwards: | |
606 | */ | |
607 | end_pfn = e820_end_of_ram(); | |
608 | ||
609 | check_efer(); | |
610 | ||
611 | init_memory_mapping(0, (end_pfn_map << PAGE_SHIFT)); | |
612 | ||
f6c2e333 SS |
613 | zap_low_mappings(0); |
614 | ||
888ba6c6 | 615 | #ifdef CONFIG_ACPI |
1da177e4 LT |
616 | /* |
617 | * Initialize the ACPI boot-time table parser (gets the RSDP and SDT). | |
618 | * Call this early for SRAT node setup. | |
619 | */ | |
620 | acpi_boot_table_init(); | |
621 | #endif | |
622 | ||
623 | #ifdef CONFIG_ACPI_NUMA | |
624 | /* | |
625 | * Parse SRAT to discover nodes. | |
626 | */ | |
627 | acpi_numa_init(); | |
628 | #endif | |
629 | ||
2b97690f | 630 | #ifdef CONFIG_NUMA |
1da177e4 LT |
631 | numa_initmem_init(0, end_pfn); |
632 | #else | |
bbfceef4 | 633 | contig_initmem_init(0, end_pfn); |
1da177e4 LT |
634 | #endif |
635 | ||
636 | /* Reserve direct mapping */ | |
637 | reserve_bootmem_generic(table_start << PAGE_SHIFT, | |
638 | (table_end - table_start) << PAGE_SHIFT); | |
639 | ||
640 | /* reserve kernel */ | |
641 | kernel_end = round_up(__pa_symbol(&_end),PAGE_SIZE); | |
642 | reserve_bootmem_generic(HIGH_MEMORY, kernel_end - HIGH_MEMORY); | |
643 | ||
644 | /* | |
645 | * reserve physical page 0 - it's a special BIOS page on many boxes, | |
646 | * enabling clean reboots, SMP operation, laptop functions. | |
647 | */ | |
648 | reserve_bootmem_generic(0, PAGE_SIZE); | |
649 | ||
650 | /* reserve ebda region */ | |
651 | reserve_ebda_region(); | |
652 | ||
653 | #ifdef CONFIG_SMP | |
654 | /* | |
655 | * But first pinch a few for the stack/trampoline stuff | |
656 | * FIXME: Don't need the extra page at 4K, but need to fix | |
657 | * trampoline before removing it. (see the GDT stuff) | |
658 | */ | |
659 | reserve_bootmem_generic(PAGE_SIZE, PAGE_SIZE); | |
660 | ||
661 | /* Reserve SMP trampoline */ | |
662 | reserve_bootmem_generic(SMP_TRAMPOLINE_BASE, PAGE_SIZE); | |
663 | #endif | |
664 | ||
665 | #ifdef CONFIG_ACPI_SLEEP | |
666 | /* | |
667 | * Reserve low memory region for sleep support. | |
668 | */ | |
669 | acpi_reserve_bootmem(); | |
670 | #endif | |
671 | #ifdef CONFIG_X86_LOCAL_APIC | |
672 | /* | |
673 | * Find and reserve possible boot-time SMP configuration: | |
674 | */ | |
675 | find_smp_config(); | |
676 | #endif | |
677 | #ifdef CONFIG_BLK_DEV_INITRD | |
678 | if (LOADER_TYPE && INITRD_START) { | |
679 | if (INITRD_START + INITRD_SIZE <= (end_pfn << PAGE_SHIFT)) { | |
680 | reserve_bootmem_generic(INITRD_START, INITRD_SIZE); | |
681 | initrd_start = | |
682 | INITRD_START ? INITRD_START + PAGE_OFFSET : 0; | |
683 | initrd_end = initrd_start+INITRD_SIZE; | |
684 | } | |
685 | else { | |
686 | printk(KERN_ERR "initrd extends beyond end of memory " | |
687 | "(0x%08lx > 0x%08lx)\ndisabling initrd\n", | |
688 | (unsigned long)(INITRD_START + INITRD_SIZE), | |
689 | (unsigned long)(end_pfn << PAGE_SHIFT)); | |
690 | initrd_start = 0; | |
691 | } | |
692 | } | |
693 | #endif | |
5f5609df EB |
694 | #ifdef CONFIG_KEXEC |
695 | if (crashk_res.start != crashk_res.end) { | |
696 | reserve_bootmem(crashk_res.start, | |
697 | crashk_res.end - crashk_res.start + 1); | |
698 | } | |
699 | #endif | |
0d317fb7 | 700 | |
1da177e4 LT |
701 | paging_init(); |
702 | ||
703 | check_ioapic(); | |
704 | ||
888ba6c6 | 705 | #ifdef CONFIG_ACPI |
1da177e4 LT |
706 | /* |
707 | * Read APIC and some other early information from ACPI tables. | |
708 | */ | |
709 | acpi_boot_init(); | |
710 | #endif | |
711 | ||
712 | #ifdef CONFIG_X86_LOCAL_APIC | |
713 | /* | |
714 | * get boot-time SMP configuration: | |
715 | */ | |
716 | if (smp_found_config) | |
717 | get_smp_config(); | |
718 | init_apic_mappings(); | |
719 | #endif | |
720 | ||
721 | /* | |
722 | * Request address space for all standard RAM and ROM resources | |
723 | * and also for regions reported as reserved by the e820. | |
724 | */ | |
725 | probe_roms(); | |
726 | e820_reserve_resources(); | |
727 | ||
728 | request_resource(&iomem_resource, &video_ram_resource); | |
729 | ||
730 | { | |
731 | unsigned i; | |
732 | /* request I/O space for devices used on all i[345]86 PCs */ | |
733 | for (i = 0; i < STANDARD_IO_RESOURCES; i++) | |
734 | request_resource(&ioport_resource, &standard_io_resources[i]); | |
735 | } | |
736 | ||
a1e97782 | 737 | e820_setup_gap(); |
1da177e4 LT |
738 | |
739 | #ifdef CONFIG_GART_IOMMU | |
740 | iommu_hole_init(); | |
741 | #endif | |
742 | ||
743 | #ifdef CONFIG_VT | |
744 | #if defined(CONFIG_VGA_CONSOLE) | |
745 | conswitchp = &vga_con; | |
746 | #elif defined(CONFIG_DUMMY_CONSOLE) | |
747 | conswitchp = &dummy_con; | |
748 | #endif | |
749 | #endif | |
750 | } | |
751 | ||
e6982c67 | 752 | static int __cpuinit get_model_name(struct cpuinfo_x86 *c) |
1da177e4 LT |
753 | { |
754 | unsigned int *v; | |
755 | ||
ebfcaa96 | 756 | if (c->extended_cpuid_level < 0x80000004) |
1da177e4 LT |
757 | return 0; |
758 | ||
759 | v = (unsigned int *) c->x86_model_id; | |
760 | cpuid(0x80000002, &v[0], &v[1], &v[2], &v[3]); | |
761 | cpuid(0x80000003, &v[4], &v[5], &v[6], &v[7]); | |
762 | cpuid(0x80000004, &v[8], &v[9], &v[10], &v[11]); | |
763 | c->x86_model_id[48] = 0; | |
764 | return 1; | |
765 | } | |
766 | ||
767 | ||
e6982c67 | 768 | static void __cpuinit display_cacheinfo(struct cpuinfo_x86 *c) |
1da177e4 LT |
769 | { |
770 | unsigned int n, dummy, eax, ebx, ecx, edx; | |
771 | ||
ebfcaa96 | 772 | n = c->extended_cpuid_level; |
1da177e4 LT |
773 | |
774 | if (n >= 0x80000005) { | |
775 | cpuid(0x80000005, &dummy, &ebx, &ecx, &edx); | |
776 | printk(KERN_INFO "CPU: L1 I Cache: %dK (%d bytes/line), D cache %dK (%d bytes/line)\n", | |
777 | edx>>24, edx&0xFF, ecx>>24, ecx&0xFF); | |
778 | c->x86_cache_size=(ecx>>24)+(edx>>24); | |
779 | /* On K8 L1 TLB is inclusive, so don't count it */ | |
780 | c->x86_tlbsize = 0; | |
781 | } | |
782 | ||
783 | if (n >= 0x80000006) { | |
784 | cpuid(0x80000006, &dummy, &ebx, &ecx, &edx); | |
785 | ecx = cpuid_ecx(0x80000006); | |
786 | c->x86_cache_size = ecx >> 16; | |
787 | c->x86_tlbsize += ((ebx >> 16) & 0xfff) + (ebx & 0xfff); | |
788 | ||
789 | printk(KERN_INFO "CPU: L2 Cache: %dK (%d bytes/line)\n", | |
790 | c->x86_cache_size, ecx & 0xFF); | |
791 | } | |
792 | ||
793 | if (n >= 0x80000007) | |
794 | cpuid(0x80000007, &dummy, &dummy, &dummy, &c->x86_power); | |
795 | if (n >= 0x80000008) { | |
796 | cpuid(0x80000008, &eax, &dummy, &dummy, &dummy); | |
797 | c->x86_virt_bits = (eax >> 8) & 0xff; | |
798 | c->x86_phys_bits = eax & 0xff; | |
799 | } | |
800 | } | |
801 | ||
3f098c26 AK |
802 | #ifdef CONFIG_NUMA |
803 | static int nearby_node(int apicid) | |
804 | { | |
805 | int i; | |
806 | for (i = apicid - 1; i >= 0; i--) { | |
807 | int node = apicid_to_node[i]; | |
808 | if (node != NUMA_NO_NODE && node_online(node)) | |
809 | return node; | |
810 | } | |
811 | for (i = apicid + 1; i < MAX_LOCAL_APIC; i++) { | |
812 | int node = apicid_to_node[i]; | |
813 | if (node != NUMA_NO_NODE && node_online(node)) | |
814 | return node; | |
815 | } | |
816 | return first_node(node_online_map); /* Shouldn't happen */ | |
817 | } | |
818 | #endif | |
819 | ||
63518644 AK |
820 | /* |
821 | * On a AMD dual core setup the lower bits of the APIC id distingush the cores. | |
822 | * Assumes number of cores is a power of two. | |
823 | */ | |
824 | static void __init amd_detect_cmp(struct cpuinfo_x86 *c) | |
825 | { | |
826 | #ifdef CONFIG_SMP | |
2942283e | 827 | int cpu = smp_processor_id(); |
b41e2939 | 828 | unsigned bits; |
3f098c26 AK |
829 | #ifdef CONFIG_NUMA |
830 | int node = 0; | |
0b07e984 | 831 | unsigned apicid = phys_proc_id[cpu]; |
3f098c26 | 832 | #endif |
b41e2939 AK |
833 | |
834 | bits = 0; | |
94605eff | 835 | while ((1 << bits) < c->x86_max_cores) |
b41e2939 AK |
836 | bits++; |
837 | ||
838 | /* Low order bits define the core id (index of core in socket) */ | |
839 | cpu_core_id[cpu] = phys_proc_id[cpu] & ((1 << bits)-1); | |
840 | /* Convert the APIC ID into the socket ID */ | |
841 | phys_proc_id[cpu] >>= bits; | |
63518644 AK |
842 | |
843 | #ifdef CONFIG_NUMA | |
3f098c26 AK |
844 | node = phys_proc_id[cpu]; |
845 | if (apicid_to_node[apicid] != NUMA_NO_NODE) | |
846 | node = apicid_to_node[apicid]; | |
847 | if (!node_online(node)) { | |
848 | /* Two possibilities here: | |
849 | - The CPU is missing memory and no node was created. | |
850 | In that case try picking one from a nearby CPU | |
851 | - The APIC IDs differ from the HyperTransport node IDs | |
852 | which the K8 northbridge parsing fills in. | |
853 | Assume they are all increased by a constant offset, | |
854 | but in the same order as the HT nodeids. | |
855 | If that doesn't result in a usable node fall back to the | |
856 | path for the previous case. */ | |
857 | int ht_nodeid = apicid - (phys_proc_id[0] << bits); | |
858 | if (ht_nodeid >= 0 && | |
859 | apicid_to_node[ht_nodeid] != NUMA_NO_NODE) | |
860 | node = apicid_to_node[ht_nodeid]; | |
861 | /* Pick a nearby node */ | |
862 | if (!node_online(node)) | |
863 | node = nearby_node(apicid); | |
864 | } | |
69d81fcd | 865 | numa_set_node(cpu, node); |
3f098c26 AK |
866 | |
867 | printk(KERN_INFO "CPU %d(%d) -> Node %d -> Core %d\n", | |
94605eff | 868 | cpu, c->x86_max_cores, node, cpu_core_id[cpu]); |
63518644 | 869 | #endif |
63518644 AK |
870 | #endif |
871 | } | |
1da177e4 LT |
872 | |
873 | static int __init init_amd(struct cpuinfo_x86 *c) | |
874 | { | |
875 | int r; | |
876 | int level; | |
1da177e4 | 877 | |
bc5e8fdf LT |
878 | #ifdef CONFIG_SMP |
879 | unsigned long value; | |
880 | ||
7d318d77 AK |
881 | /* |
882 | * Disable TLB flush filter by setting HWCR.FFDIS on K8 | |
883 | * bit 6 of msr C001_0015 | |
884 | * | |
885 | * Errata 63 for SH-B3 steppings | |
886 | * Errata 122 for all steppings (F+ have it disabled by default) | |
887 | */ | |
888 | if (c->x86 == 15) { | |
889 | rdmsrl(MSR_K8_HWCR, value); | |
890 | value |= 1 << 6; | |
891 | wrmsrl(MSR_K8_HWCR, value); | |
892 | } | |
bc5e8fdf LT |
893 | #endif |
894 | ||
1da177e4 LT |
895 | /* Bit 31 in normal CPUID used for nonstandard 3DNow ID; |
896 | 3DNow is IDd by bit 31 in extended CPUID (1*32+31) anyway */ | |
897 | clear_bit(0*32+31, &c->x86_capability); | |
898 | ||
899 | /* C-stepping K8? */ | |
900 | level = cpuid_eax(1); | |
901 | if ((level >= 0x0f48 && level < 0x0f50) || level >= 0x0f58) | |
902 | set_bit(X86_FEATURE_K8_C, &c->x86_capability); | |
903 | ||
904 | r = get_model_name(c); | |
905 | if (!r) { | |
906 | switch (c->x86) { | |
907 | case 15: | |
908 | /* Should distinguish Models here, but this is only | |
909 | a fallback anyways. */ | |
910 | strcpy(c->x86_model_id, "Hammer"); | |
911 | break; | |
912 | } | |
913 | } | |
914 | display_cacheinfo(c); | |
915 | ||
130951cc AK |
916 | /* c->x86_power is 8000_0007 edx. Bit 8 is constant TSC */ |
917 | if (c->x86_power & (1<<8)) | |
918 | set_bit(X86_FEATURE_CONSTANT_TSC, &c->x86_capability); | |
919 | ||
ebfcaa96 | 920 | if (c->extended_cpuid_level >= 0x80000008) { |
94605eff SS |
921 | c->x86_max_cores = (cpuid_ecx(0x80000008) & 0xff) + 1; |
922 | if (c->x86_max_cores & (c->x86_max_cores - 1)) | |
923 | c->x86_max_cores = 1; | |
1da177e4 | 924 | |
63518644 | 925 | amd_detect_cmp(c); |
1da177e4 LT |
926 | } |
927 | ||
928 | return r; | |
929 | } | |
930 | ||
e6982c67 | 931 | static void __cpuinit detect_ht(struct cpuinfo_x86 *c) |
1da177e4 LT |
932 | { |
933 | #ifdef CONFIG_SMP | |
934 | u32 eax, ebx, ecx, edx; | |
94605eff | 935 | int index_msb, core_bits; |
1da177e4 | 936 | int cpu = smp_processor_id(); |
94605eff SS |
937 | |
938 | cpuid(1, &eax, &ebx, &ecx, &edx); | |
939 | ||
940 | c->apicid = phys_pkg_id(0); | |
941 | ||
63518644 | 942 | if (!cpu_has(c, X86_FEATURE_HT) || cpu_has(c, X86_FEATURE_CMP_LEGACY)) |
1da177e4 LT |
943 | return; |
944 | ||
1da177e4 | 945 | smp_num_siblings = (ebx & 0xff0000) >> 16; |
94605eff | 946 | |
1da177e4 LT |
947 | if (smp_num_siblings == 1) { |
948 | printk(KERN_INFO "CPU: Hyper-Threading is disabled\n"); | |
94605eff SS |
949 | } else if (smp_num_siblings > 1 ) { |
950 | ||
1da177e4 LT |
951 | if (smp_num_siblings > NR_CPUS) { |
952 | printk(KERN_WARNING "CPU: Unsupported number of the siblings %d", smp_num_siblings); | |
953 | smp_num_siblings = 1; | |
954 | return; | |
955 | } | |
94605eff SS |
956 | |
957 | index_msb = get_count_order(smp_num_siblings); | |
1da177e4 | 958 | phys_proc_id[cpu] = phys_pkg_id(index_msb); |
94605eff | 959 | |
1da177e4 LT |
960 | printk(KERN_INFO "CPU: Physical Processor ID: %d\n", |
961 | phys_proc_id[cpu]); | |
3dd9d514 | 962 | |
94605eff | 963 | smp_num_siblings = smp_num_siblings / c->x86_max_cores; |
3dd9d514 | 964 | |
94605eff SS |
965 | index_msb = get_count_order(smp_num_siblings) ; |
966 | ||
967 | core_bits = get_count_order(c->x86_max_cores); | |
3dd9d514 | 968 | |
94605eff SS |
969 | cpu_core_id[cpu] = phys_pkg_id(index_msb) & |
970 | ((1 << core_bits) - 1); | |
3dd9d514 | 971 | |
94605eff | 972 | if (c->x86_max_cores > 1) |
3dd9d514 AK |
973 | printk(KERN_INFO "CPU: Processor Core ID: %d\n", |
974 | cpu_core_id[cpu]); | |
1da177e4 LT |
975 | } |
976 | #endif | |
977 | } | |
978 | ||
3dd9d514 AK |
979 | /* |
980 | * find out the number of processor cores on the die | |
981 | */ | |
e6982c67 | 982 | static int __cpuinit intel_num_cpu_cores(struct cpuinfo_x86 *c) |
3dd9d514 AK |
983 | { |
984 | unsigned int eax; | |
985 | ||
986 | if (c->cpuid_level < 4) | |
987 | return 1; | |
988 | ||
989 | __asm__("cpuid" | |
990 | : "=a" (eax) | |
991 | : "0" (4), "c" (0) | |
992 | : "bx", "dx"); | |
993 | ||
994 | if (eax & 0x1f) | |
995 | return ((eax >> 26) + 1); | |
996 | else | |
997 | return 1; | |
998 | } | |
999 | ||
df0cc26b AK |
1000 | static void srat_detect_node(void) |
1001 | { | |
1002 | #ifdef CONFIG_NUMA | |
ddea7be0 | 1003 | unsigned node; |
df0cc26b AK |
1004 | int cpu = smp_processor_id(); |
1005 | ||
1006 | /* Don't do the funky fallback heuristics the AMD version employs | |
1007 | for now. */ | |
ddea7be0 | 1008 | node = apicid_to_node[hard_smp_processor_id()]; |
df0cc26b AK |
1009 | if (node == NUMA_NO_NODE) |
1010 | node = 0; | |
69d81fcd | 1011 | numa_set_node(cpu, node); |
df0cc26b AK |
1012 | |
1013 | if (acpi_numa > 0) | |
1014 | printk(KERN_INFO "CPU %d -> Node %d\n", cpu, node); | |
1015 | #endif | |
1016 | } | |
1017 | ||
e6982c67 | 1018 | static void __cpuinit init_intel(struct cpuinfo_x86 *c) |
1da177e4 LT |
1019 | { |
1020 | /* Cache sizes */ | |
1021 | unsigned n; | |
1022 | ||
1023 | init_intel_cacheinfo(c); | |
ebfcaa96 | 1024 | n = c->extended_cpuid_level; |
1da177e4 LT |
1025 | if (n >= 0x80000008) { |
1026 | unsigned eax = cpuid_eax(0x80000008); | |
1027 | c->x86_virt_bits = (eax >> 8) & 0xff; | |
1028 | c->x86_phys_bits = eax & 0xff; | |
af9c142d SL |
1029 | /* CPUID workaround for Intel 0F34 CPU */ |
1030 | if (c->x86_vendor == X86_VENDOR_INTEL && | |
1031 | c->x86 == 0xF && c->x86_model == 0x3 && | |
1032 | c->x86_mask == 0x4) | |
1033 | c->x86_phys_bits = 36; | |
1da177e4 LT |
1034 | } |
1035 | ||
1036 | if (c->x86 == 15) | |
1037 | c->x86_cache_alignment = c->x86_clflush_size * 2; | |
39b3a791 AK |
1038 | if ((c->x86 == 0xf && c->x86_model >= 0x03) || |
1039 | (c->x86 == 0x6 && c->x86_model >= 0x0e)) | |
c29601e9 | 1040 | set_bit(X86_FEATURE_CONSTANT_TSC, &c->x86_capability); |
94605eff | 1041 | c->x86_max_cores = intel_num_cpu_cores(c); |
df0cc26b AK |
1042 | |
1043 | srat_detect_node(); | |
1da177e4 LT |
1044 | } |
1045 | ||
672289e9 | 1046 | static void __cpuinit get_cpu_vendor(struct cpuinfo_x86 *c) |
1da177e4 LT |
1047 | { |
1048 | char *v = c->x86_vendor_id; | |
1049 | ||
1050 | if (!strcmp(v, "AuthenticAMD")) | |
1051 | c->x86_vendor = X86_VENDOR_AMD; | |
1052 | else if (!strcmp(v, "GenuineIntel")) | |
1053 | c->x86_vendor = X86_VENDOR_INTEL; | |
1054 | else | |
1055 | c->x86_vendor = X86_VENDOR_UNKNOWN; | |
1056 | } | |
1057 | ||
1058 | struct cpu_model_info { | |
1059 | int vendor; | |
1060 | int family; | |
1061 | char *model_names[16]; | |
1062 | }; | |
1063 | ||
1064 | /* Do some early cpuid on the boot CPU to get some parameter that are | |
1065 | needed before check_bugs. Everything advanced is in identify_cpu | |
1066 | below. */ | |
e6982c67 | 1067 | void __cpuinit early_identify_cpu(struct cpuinfo_x86 *c) |
1da177e4 LT |
1068 | { |
1069 | u32 tfms; | |
1070 | ||
1071 | c->loops_per_jiffy = loops_per_jiffy; | |
1072 | c->x86_cache_size = -1; | |
1073 | c->x86_vendor = X86_VENDOR_UNKNOWN; | |
1074 | c->x86_model = c->x86_mask = 0; /* So far unknown... */ | |
1075 | c->x86_vendor_id[0] = '\0'; /* Unset */ | |
1076 | c->x86_model_id[0] = '\0'; /* Unset */ | |
1077 | c->x86_clflush_size = 64; | |
1078 | c->x86_cache_alignment = c->x86_clflush_size; | |
94605eff | 1079 | c->x86_max_cores = 1; |
ebfcaa96 | 1080 | c->extended_cpuid_level = 0; |
1da177e4 LT |
1081 | memset(&c->x86_capability, 0, sizeof c->x86_capability); |
1082 | ||
1083 | /* Get vendor name */ | |
1084 | cpuid(0x00000000, (unsigned int *)&c->cpuid_level, | |
1085 | (unsigned int *)&c->x86_vendor_id[0], | |
1086 | (unsigned int *)&c->x86_vendor_id[8], | |
1087 | (unsigned int *)&c->x86_vendor_id[4]); | |
1088 | ||
1089 | get_cpu_vendor(c); | |
1090 | ||
1091 | /* Initialize the standard set of capabilities */ | |
1092 | /* Note that the vendor-specific code below might override */ | |
1093 | ||
1094 | /* Intel-defined flags: level 0x00000001 */ | |
1095 | if (c->cpuid_level >= 0x00000001) { | |
1096 | __u32 misc; | |
1097 | cpuid(0x00000001, &tfms, &misc, &c->x86_capability[4], | |
1098 | &c->x86_capability[0]); | |
1099 | c->x86 = (tfms >> 8) & 0xf; | |
1100 | c->x86_model = (tfms >> 4) & 0xf; | |
1101 | c->x86_mask = tfms & 0xf; | |
f5f786d0 | 1102 | if (c->x86 == 0xf) |
1da177e4 | 1103 | c->x86 += (tfms >> 20) & 0xff; |
f5f786d0 | 1104 | if (c->x86 >= 0x6) |
1da177e4 | 1105 | c->x86_model += ((tfms >> 16) & 0xF) << 4; |
1da177e4 LT |
1106 | if (c->x86_capability[0] & (1<<19)) |
1107 | c->x86_clflush_size = ((misc >> 8) & 0xff) * 8; | |
1da177e4 LT |
1108 | } else { |
1109 | /* Have CPUID level 0 only - unheard of */ | |
1110 | c->x86 = 4; | |
1111 | } | |
a158608b AK |
1112 | |
1113 | #ifdef CONFIG_SMP | |
b41e2939 | 1114 | phys_proc_id[smp_processor_id()] = (cpuid_ebx(1) >> 24) & 0xff; |
a158608b | 1115 | #endif |
1da177e4 LT |
1116 | } |
1117 | ||
1118 | /* | |
1119 | * This does the hard work of actually picking apart the CPU stuff... | |
1120 | */ | |
e6982c67 | 1121 | void __cpuinit identify_cpu(struct cpuinfo_x86 *c) |
1da177e4 LT |
1122 | { |
1123 | int i; | |
1124 | u32 xlvl; | |
1125 | ||
1126 | early_identify_cpu(c); | |
1127 | ||
1128 | /* AMD-defined flags: level 0x80000001 */ | |
1129 | xlvl = cpuid_eax(0x80000000); | |
ebfcaa96 | 1130 | c->extended_cpuid_level = xlvl; |
1da177e4 LT |
1131 | if ((xlvl & 0xffff0000) == 0x80000000) { |
1132 | if (xlvl >= 0x80000001) { | |
1133 | c->x86_capability[1] = cpuid_edx(0x80000001); | |
5b7abc6f | 1134 | c->x86_capability[6] = cpuid_ecx(0x80000001); |
1da177e4 LT |
1135 | } |
1136 | if (xlvl >= 0x80000004) | |
1137 | get_model_name(c); /* Default name */ | |
1138 | } | |
1139 | ||
1140 | /* Transmeta-defined flags: level 0x80860001 */ | |
1141 | xlvl = cpuid_eax(0x80860000); | |
1142 | if ((xlvl & 0xffff0000) == 0x80860000) { | |
1143 | /* Don't set x86_cpuid_level here for now to not confuse. */ | |
1144 | if (xlvl >= 0x80860001) | |
1145 | c->x86_capability[2] = cpuid_edx(0x80860001); | |
1146 | } | |
1147 | ||
1148 | /* | |
1149 | * Vendor-specific initialization. In this section we | |
1150 | * canonicalize the feature flags, meaning if there are | |
1151 | * features a certain CPU supports which CPUID doesn't | |
1152 | * tell us, CPUID claiming incorrect flags, or other bugs, | |
1153 | * we handle them here. | |
1154 | * | |
1155 | * At the end of this section, c->x86_capability better | |
1156 | * indicate the features this CPU genuinely supports! | |
1157 | */ | |
1158 | switch (c->x86_vendor) { | |
1159 | case X86_VENDOR_AMD: | |
1160 | init_amd(c); | |
1161 | break; | |
1162 | ||
1163 | case X86_VENDOR_INTEL: | |
1164 | init_intel(c); | |
1165 | break; | |
1166 | ||
1167 | case X86_VENDOR_UNKNOWN: | |
1168 | default: | |
1169 | display_cacheinfo(c); | |
1170 | break; | |
1171 | } | |
1172 | ||
1173 | select_idle_routine(c); | |
1174 | detect_ht(c); | |
1da177e4 LT |
1175 | |
1176 | /* | |
1177 | * On SMP, boot_cpu_data holds the common feature set between | |
1178 | * all CPUs; so make sure that we indicate which features are | |
1179 | * common between the CPUs. The first time this routine gets | |
1180 | * executed, c == &boot_cpu_data. | |
1181 | */ | |
1182 | if (c != &boot_cpu_data) { | |
1183 | /* AND the already accumulated flags with these */ | |
1184 | for (i = 0 ; i < NCAPINTS ; i++) | |
1185 | boot_cpu_data.x86_capability[i] &= c->x86_capability[i]; | |
1186 | } | |
1187 | ||
1188 | #ifdef CONFIG_X86_MCE | |
1189 | mcheck_init(c); | |
1190 | #endif | |
3b520b23 SL |
1191 | if (c == &boot_cpu_data) |
1192 | mtrr_bp_init(); | |
1193 | else | |
1194 | mtrr_ap_init(); | |
1da177e4 | 1195 | #ifdef CONFIG_NUMA |
3019e8eb | 1196 | numa_add_cpu(smp_processor_id()); |
1da177e4 LT |
1197 | #endif |
1198 | } | |
1199 | ||
1200 | ||
e6982c67 | 1201 | void __cpuinit print_cpu_info(struct cpuinfo_x86 *c) |
1da177e4 LT |
1202 | { |
1203 | if (c->x86_model_id[0]) | |
1204 | printk("%s", c->x86_model_id); | |
1205 | ||
1206 | if (c->x86_mask || c->cpuid_level >= 0) | |
1207 | printk(" stepping %02x\n", c->x86_mask); | |
1208 | else | |
1209 | printk("\n"); | |
1210 | } | |
1211 | ||
1212 | /* | |
1213 | * Get CPU information for use by the procfs. | |
1214 | */ | |
1215 | ||
1216 | static int show_cpuinfo(struct seq_file *m, void *v) | |
1217 | { | |
1218 | struct cpuinfo_x86 *c = v; | |
1219 | ||
1220 | /* | |
1221 | * These flag bits must match the definitions in <asm/cpufeature.h>. | |
1222 | * NULL means this bit is undefined or reserved; either way it doesn't | |
1223 | * have meaning as far as Linux is concerned. Note that it's important | |
1224 | * to realize there is a difference between this table and CPUID -- if | |
1225 | * applications want to get the raw CPUID data, they should access | |
1226 | * /dev/cpu/<cpu_nr>/cpuid instead. | |
1227 | */ | |
1228 | static char *x86_cap_flags[] = { | |
1229 | /* Intel-defined */ | |
1230 | "fpu", "vme", "de", "pse", "tsc", "msr", "pae", "mce", | |
1231 | "cx8", "apic", NULL, "sep", "mtrr", "pge", "mca", "cmov", | |
1232 | "pat", "pse36", "pn", "clflush", NULL, "dts", "acpi", "mmx", | |
1233 | "fxsr", "sse", "sse2", "ss", "ht", "tm", "ia64", NULL, | |
1234 | ||
1235 | /* AMD-defined */ | |
3c3b73b6 | 1236 | NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, |
1da177e4 LT |
1237 | NULL, NULL, NULL, "syscall", NULL, NULL, NULL, NULL, |
1238 | NULL, NULL, NULL, NULL, "nx", NULL, "mmxext", NULL, | |
3f98bc49 | 1239 | NULL, "fxsr_opt", "rdtscp", NULL, NULL, "lm", "3dnowext", "3dnow", |
1da177e4 LT |
1240 | |
1241 | /* Transmeta-defined */ | |
1242 | "recovery", "longrun", NULL, "lrti", NULL, NULL, NULL, NULL, | |
1243 | NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, | |
1244 | NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, | |
1245 | NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, | |
1246 | ||
1247 | /* Other (Linux-defined) */ | |
622dcaf9 | 1248 | "cxmmx", NULL, "cyrix_arr", "centaur_mcr", NULL, |
c29601e9 | 1249 | "constant_tsc", NULL, NULL, |
1da177e4 LT |
1250 | NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, |
1251 | NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, | |
1252 | NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, | |
1253 | ||
1254 | /* Intel-defined (#2) */ | |
daedb82d | 1255 | "pni", NULL, NULL, "monitor", "ds_cpl", "vmx", NULL, "est", |
1da177e4 LT |
1256 | "tm2", NULL, "cid", NULL, NULL, "cx16", "xtpr", NULL, |
1257 | NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, | |
1258 | NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, | |
1259 | ||
5b7abc6f PA |
1260 | /* VIA/Cyrix/Centaur-defined */ |
1261 | NULL, NULL, "rng", "rng_en", NULL, NULL, "ace", "ace_en", | |
1262 | NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, | |
1263 | NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, | |
1264 | NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, | |
1265 | ||
1da177e4 | 1266 | /* AMD-defined (#2) */ |
3f98bc49 | 1267 | "lahf_lm", "cmp_legacy", "svm", NULL, "cr8_legacy", NULL, NULL, NULL, |
1da177e4 LT |
1268 | NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, |
1269 | NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, | |
5b7abc6f | 1270 | NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, |
1da177e4 LT |
1271 | }; |
1272 | static char *x86_power_flags[] = { | |
1273 | "ts", /* temperature sensor */ | |
1274 | "fid", /* frequency id control */ | |
1275 | "vid", /* voltage id control */ | |
1276 | "ttp", /* thermal trip */ | |
1277 | "tm", | |
3f98bc49 AK |
1278 | "stc", |
1279 | NULL, | |
39b3a791 | 1280 | /* nothing */ /* constant_tsc - moved to flags */ |
1da177e4 LT |
1281 | }; |
1282 | ||
1283 | ||
1284 | #ifdef CONFIG_SMP | |
1285 | if (!cpu_online(c-cpu_data)) | |
1286 | return 0; | |
1287 | #endif | |
1288 | ||
1289 | seq_printf(m,"processor\t: %u\n" | |
1290 | "vendor_id\t: %s\n" | |
1291 | "cpu family\t: %d\n" | |
1292 | "model\t\t: %d\n" | |
1293 | "model name\t: %s\n", | |
1294 | (unsigned)(c-cpu_data), | |
1295 | c->x86_vendor_id[0] ? c->x86_vendor_id : "unknown", | |
1296 | c->x86, | |
1297 | (int)c->x86_model, | |
1298 | c->x86_model_id[0] ? c->x86_model_id : "unknown"); | |
1299 | ||
1300 | if (c->x86_mask || c->cpuid_level >= 0) | |
1301 | seq_printf(m, "stepping\t: %d\n", c->x86_mask); | |
1302 | else | |
1303 | seq_printf(m, "stepping\t: unknown\n"); | |
1304 | ||
1305 | if (cpu_has(c,X86_FEATURE_TSC)) { | |
95235ca2 VP |
1306 | unsigned int freq = cpufreq_quick_get((unsigned)(c-cpu_data)); |
1307 | if (!freq) | |
1308 | freq = cpu_khz; | |
1da177e4 | 1309 | seq_printf(m, "cpu MHz\t\t: %u.%03u\n", |
95235ca2 | 1310 | freq / 1000, (freq % 1000)); |
1da177e4 LT |
1311 | } |
1312 | ||
1313 | /* Cache size */ | |
1314 | if (c->x86_cache_size >= 0) | |
1315 | seq_printf(m, "cache size\t: %d KB\n", c->x86_cache_size); | |
1316 | ||
1317 | #ifdef CONFIG_SMP | |
94605eff | 1318 | if (smp_num_siblings * c->x86_max_cores > 1) { |
db468681 AK |
1319 | int cpu = c - cpu_data; |
1320 | seq_printf(m, "physical id\t: %d\n", phys_proc_id[cpu]); | |
94605eff | 1321 | seq_printf(m, "siblings\t: %d\n", cpus_weight(cpu_core_map[cpu])); |
d31ddaa1 | 1322 | seq_printf(m, "core id\t\t: %d\n", cpu_core_id[cpu]); |
94605eff | 1323 | seq_printf(m, "cpu cores\t: %d\n", c->booted_cores); |
db468681 | 1324 | } |
1da177e4 LT |
1325 | #endif |
1326 | ||
1327 | seq_printf(m, | |
1328 | "fpu\t\t: yes\n" | |
1329 | "fpu_exception\t: yes\n" | |
1330 | "cpuid level\t: %d\n" | |
1331 | "wp\t\t: yes\n" | |
1332 | "flags\t\t:", | |
1333 | c->cpuid_level); | |
1334 | ||
1335 | { | |
1336 | int i; | |
1337 | for ( i = 0 ; i < 32*NCAPINTS ; i++ ) | |
1338 | if ( test_bit(i, &c->x86_capability) && | |
1339 | x86_cap_flags[i] != NULL ) | |
1340 | seq_printf(m, " %s", x86_cap_flags[i]); | |
1341 | } | |
1342 | ||
1343 | seq_printf(m, "\nbogomips\t: %lu.%02lu\n", | |
1344 | c->loops_per_jiffy/(500000/HZ), | |
1345 | (c->loops_per_jiffy/(5000/HZ)) % 100); | |
1346 | ||
1347 | if (c->x86_tlbsize > 0) | |
1348 | seq_printf(m, "TLB size\t: %d 4K pages\n", c->x86_tlbsize); | |
1349 | seq_printf(m, "clflush size\t: %d\n", c->x86_clflush_size); | |
1350 | seq_printf(m, "cache_alignment\t: %d\n", c->x86_cache_alignment); | |
1351 | ||
1352 | seq_printf(m, "address sizes\t: %u bits physical, %u bits virtual\n", | |
1353 | c->x86_phys_bits, c->x86_virt_bits); | |
1354 | ||
1355 | seq_printf(m, "power management:"); | |
1356 | { | |
1357 | unsigned i; | |
1358 | for (i = 0; i < 32; i++) | |
1359 | if (c->x86_power & (1 << i)) { | |
3f98bc49 AK |
1360 | if (i < ARRAY_SIZE(x86_power_flags) && |
1361 | x86_power_flags[i]) | |
1362 | seq_printf(m, "%s%s", | |
1363 | x86_power_flags[i][0]?" ":"", | |
1364 | x86_power_flags[i]); | |
1da177e4 LT |
1365 | else |
1366 | seq_printf(m, " [%d]", i); | |
1367 | } | |
1368 | } | |
1da177e4 | 1369 | |
d31ddaa1 | 1370 | seq_printf(m, "\n\n"); |
1da177e4 LT |
1371 | |
1372 | return 0; | |
1373 | } | |
1374 | ||
1375 | static void *c_start(struct seq_file *m, loff_t *pos) | |
1376 | { | |
1377 | return *pos < NR_CPUS ? cpu_data + *pos : NULL; | |
1378 | } | |
1379 | ||
1380 | static void *c_next(struct seq_file *m, void *v, loff_t *pos) | |
1381 | { | |
1382 | ++*pos; | |
1383 | return c_start(m, pos); | |
1384 | } | |
1385 | ||
1386 | static void c_stop(struct seq_file *m, void *v) | |
1387 | { | |
1388 | } | |
1389 | ||
1390 | struct seq_operations cpuinfo_op = { | |
1391 | .start =c_start, | |
1392 | .next = c_next, | |
1393 | .stop = c_stop, | |
1394 | .show = show_cpuinfo, | |
1395 | }; | |
e9928674 AK |
1396 | |
1397 | static int __init run_dmi_scan(void) | |
1398 | { | |
1399 | dmi_scan_machine(); | |
1400 | return 0; | |
1401 | } | |
1402 | core_initcall(run_dmi_scan); | |
1403 |