Commit | Line | Data |
---|---|---|
1da177e4 | 1 | /* |
1da177e4 | 2 | * Copyright (C) 1995 Linus Torvalds |
1da177e4 LT |
3 | */ |
4 | ||
5 | /* | |
6 | * This file handles the architecture-dependent parts of initialization | |
7 | */ | |
8 | ||
9 | #include <linux/errno.h> | |
10 | #include <linux/sched.h> | |
11 | #include <linux/kernel.h> | |
12 | #include <linux/mm.h> | |
13 | #include <linux/stddef.h> | |
14 | #include <linux/unistd.h> | |
15 | #include <linux/ptrace.h> | |
16 | #include <linux/slab.h> | |
17 | #include <linux/user.h> | |
894673ee | 18 | #include <linux/screen_info.h> |
1da177e4 LT |
19 | #include <linux/ioport.h> |
20 | #include <linux/delay.h> | |
1da177e4 LT |
21 | #include <linux/init.h> |
22 | #include <linux/initrd.h> | |
23 | #include <linux/highmem.h> | |
24 | #include <linux/bootmem.h> | |
25 | #include <linux/module.h> | |
26 | #include <asm/processor.h> | |
27 | #include <linux/console.h> | |
28 | #include <linux/seq_file.h> | |
aac04b32 | 29 | #include <linux/crash_dump.h> |
1da177e4 LT |
30 | #include <linux/root_dev.h> |
31 | #include <linux/pci.h> | |
5b83683f | 32 | #include <linux/efi.h> |
1da177e4 LT |
33 | #include <linux/acpi.h> |
34 | #include <linux/kallsyms.h> | |
35 | #include <linux/edd.h> | |
138fe4e0 | 36 | #include <linux/iscsi_ibft.h> |
bbfceef4 | 37 | #include <linux/mmzone.h> |
5f5609df | 38 | #include <linux/kexec.h> |
95235ca2 | 39 | #include <linux/cpufreq.h> |
e9928674 | 40 | #include <linux/dmi.h> |
17a941d8 | 41 | #include <linux/dma-mapping.h> |
681558fd | 42 | #include <linux/ctype.h> |
746ef0cd | 43 | #include <linux/uaccess.h> |
f212ec4b | 44 | #include <linux/init_ohci1394_dma.h> |
bbfceef4 | 45 | |
1da177e4 LT |
46 | #include <asm/mtrr.h> |
47 | #include <asm/uaccess.h> | |
48 | #include <asm/system.h> | |
e4026440 | 49 | #include <asm/vsyscall.h> |
1da177e4 LT |
50 | #include <asm/io.h> |
51 | #include <asm/smp.h> | |
52 | #include <asm/msr.h> | |
53 | #include <asm/desc.h> | |
54 | #include <video/edid.h> | |
55 | #include <asm/e820.h> | |
56 | #include <asm/dma.h> | |
aaf23042 | 57 | #include <asm/gart.h> |
1da177e4 LT |
58 | #include <asm/mpspec.h> |
59 | #include <asm/mmu_context.h> | |
1da177e4 LT |
60 | #include <asm/proto.h> |
61 | #include <asm/setup.h> | |
1da177e4 | 62 | #include <asm/numa.h> |
2bc0414e | 63 | #include <asm/sections.h> |
f2d3efed | 64 | #include <asm/dmi.h> |
00bf4098 | 65 | #include <asm/cacheflush.h> |
af7a78e9 | 66 | #include <asm/mce.h> |
eee3af4a | 67 | #include <asm/ds.h> |
df3825c5 | 68 | #include <asm/topology.h> |
e44b7b75 | 69 | #include <asm/trampoline.h> |
1da177e4 | 70 | |
dd46e3ca | 71 | #include <mach_apic.h> |
746ef0cd GOC |
72 | #ifdef CONFIG_PARAVIRT |
73 | #include <asm/paravirt.h> | |
74 | #else | |
75 | #define ARCH_SETUP | |
76 | #endif | |
77 | ||
1da177e4 LT |
78 | /* |
79 | * Machine setup.. | |
80 | */ | |
81 | ||
6c231b7b | 82 | struct cpuinfo_x86 boot_cpu_data __read_mostly; |
2ee60e17 | 83 | EXPORT_SYMBOL(boot_cpu_data); |
1da177e4 | 84 | |
7d851c8d AK |
85 | __u32 cleared_cpu_caps[NCAPINTS] __cpuinitdata; |
86 | ||
1da177e4 LT |
87 | unsigned long mmu_cr4_features; |
88 | ||
1da177e4 LT |
89 | /* Boot loader ID as an integer, for the benefit of proc_dointvec */ |
90 | int bootloader_type; | |
91 | ||
92 | unsigned long saved_video_mode; | |
93 | ||
f039b754 AK |
94 | int force_mwait __cpuinitdata; |
95 | ||
04e1ba85 | 96 | /* |
f2d3efed AK |
97 | * Early DMI memory |
98 | */ | |
99 | int dmi_alloc_index; | |
100 | char dmi_alloc_data[DMI_MAX_DATA]; | |
101 | ||
1da177e4 LT |
102 | /* |
103 | * Setup options | |
104 | */ | |
1da177e4 | 105 | struct screen_info screen_info; |
2ee60e17 | 106 | EXPORT_SYMBOL(screen_info); |
1da177e4 LT |
107 | struct sys_desc_table_struct { |
108 | unsigned short length; | |
109 | unsigned char table[0]; | |
110 | }; | |
111 | ||
112 | struct edid_info edid_info; | |
ba70710e | 113 | EXPORT_SYMBOL_GPL(edid_info); |
1da177e4 LT |
114 | |
115 | extern int root_mountflags; | |
1da177e4 | 116 | |
adf48856 | 117 | char __initdata command_line[COMMAND_LINE_SIZE]; |
1da177e4 LT |
118 | |
119 | struct resource standard_io_resources[] = { | |
120 | { .name = "dma1", .start = 0x00, .end = 0x1f, | |
121 | .flags = IORESOURCE_BUSY | IORESOURCE_IO }, | |
122 | { .name = "pic1", .start = 0x20, .end = 0x21, | |
123 | .flags = IORESOURCE_BUSY | IORESOURCE_IO }, | |
124 | { .name = "timer0", .start = 0x40, .end = 0x43, | |
125 | .flags = IORESOURCE_BUSY | IORESOURCE_IO }, | |
126 | { .name = "timer1", .start = 0x50, .end = 0x53, | |
127 | .flags = IORESOURCE_BUSY | IORESOURCE_IO }, | |
128 | { .name = "keyboard", .start = 0x60, .end = 0x6f, | |
129 | .flags = IORESOURCE_BUSY | IORESOURCE_IO }, | |
130 | { .name = "dma page reg", .start = 0x80, .end = 0x8f, | |
131 | .flags = IORESOURCE_BUSY | IORESOURCE_IO }, | |
132 | { .name = "pic2", .start = 0xa0, .end = 0xa1, | |
133 | .flags = IORESOURCE_BUSY | IORESOURCE_IO }, | |
134 | { .name = "dma2", .start = 0xc0, .end = 0xdf, | |
135 | .flags = IORESOURCE_BUSY | IORESOURCE_IO }, | |
136 | { .name = "fpu", .start = 0xf0, .end = 0xff, | |
137 | .flags = IORESOURCE_BUSY | IORESOURCE_IO } | |
138 | }; | |
139 | ||
1da177e4 LT |
140 | #define IORESOURCE_RAM (IORESOURCE_BUSY | IORESOURCE_MEM) |
141 | ||
c9cce83d | 142 | static struct resource data_resource = { |
1da177e4 LT |
143 | .name = "Kernel data", |
144 | .start = 0, | |
145 | .end = 0, | |
146 | .flags = IORESOURCE_RAM, | |
147 | }; | |
c9cce83d | 148 | static struct resource code_resource = { |
1da177e4 LT |
149 | .name = "Kernel code", |
150 | .start = 0, | |
151 | .end = 0, | |
152 | .flags = IORESOURCE_RAM, | |
153 | }; | |
c9cce83d | 154 | static struct resource bss_resource = { |
00bf4098 BW |
155 | .name = "Kernel bss", |
156 | .start = 0, | |
157 | .end = 0, | |
158 | .flags = IORESOURCE_RAM, | |
159 | }; | |
1da177e4 | 160 | |
8c61b900 TG |
161 | static void __cpuinit early_identify_cpu(struct cpuinfo_x86 *c); |
162 | ||
2c8c0e6b AK |
163 | #ifdef CONFIG_PROC_VMCORE |
164 | /* elfcorehdr= specifies the location of elf core header | |
165 | * stored by the crashed kernel. This option will be passed | |
166 | * by kexec loader to the capture kernel. | |
167 | */ | |
168 | static int __init setup_elfcorehdr(char *arg) | |
681558fd | 169 | { |
2c8c0e6b AK |
170 | char *end; |
171 | if (!arg) | |
172 | return -EINVAL; | |
173 | elfcorehdr_addr = memparse(arg, &end); | |
174 | return end > arg ? 0 : -EINVAL; | |
681558fd | 175 | } |
2c8c0e6b | 176 | early_param("elfcorehdr", setup_elfcorehdr); |
e2c03888 AK |
177 | #endif |
178 | ||
2b97690f | 179 | #ifndef CONFIG_NUMA |
bbfceef4 MT |
180 | static void __init |
181 | contig_initmem_init(unsigned long start_pfn, unsigned long end_pfn) | |
1da177e4 | 182 | { |
bbfceef4 MT |
183 | unsigned long bootmap_size, bootmap; |
184 | ||
bbfceef4 | 185 | bootmap_size = bootmem_bootmap_pages(end_pfn)<<PAGE_SHIFT; |
24a5da73 YL |
186 | bootmap = find_e820_area(0, end_pfn<<PAGE_SHIFT, bootmap_size, |
187 | PAGE_SIZE); | |
bbfceef4 | 188 | if (bootmap == -1L) |
04e1ba85 | 189 | panic("Cannot find bootmem map of size %ld\n", bootmap_size); |
bbfceef4 | 190 | bootmap_size = init_bootmem(bootmap >> PAGE_SHIFT, end_pfn); |
5cb248ab MG |
191 | e820_register_active_regions(0, start_pfn, end_pfn); |
192 | free_bootmem_with_active_regions(0, end_pfn); | |
72a7fe39 | 193 | reserve_bootmem(bootmap, bootmap_size, BOOTMEM_DEFAULT); |
04e1ba85 | 194 | } |
1da177e4 LT |
195 | #endif |
196 | ||
1da177e4 LT |
197 | #if defined(CONFIG_EDD) || defined(CONFIG_EDD_MODULE) |
198 | struct edd edd; | |
199 | #ifdef CONFIG_EDD_MODULE | |
200 | EXPORT_SYMBOL(edd); | |
201 | #endif | |
202 | /** | |
203 | * copy_edd() - Copy the BIOS EDD information | |
204 | * from boot_params into a safe place. | |
205 | * | |
206 | */ | |
207 | static inline void copy_edd(void) | |
208 | { | |
30c82645 PA |
209 | memcpy(edd.mbr_signature, boot_params.edd_mbr_sig_buffer, |
210 | sizeof(edd.mbr_signature)); | |
211 | memcpy(edd.edd_info, boot_params.eddbuf, sizeof(edd.edd_info)); | |
212 | edd.mbr_signature_nr = boot_params.edd_mbr_sig_buf_entries; | |
213 | edd.edd_info_nr = boot_params.eddbuf_entries; | |
1da177e4 LT |
214 | } |
215 | #else | |
216 | static inline void copy_edd(void) | |
217 | { | |
218 | } | |
219 | #endif | |
220 | ||
5c3391f9 BW |
221 | #ifdef CONFIG_KEXEC |
222 | static void __init reserve_crashkernel(void) | |
223 | { | |
18a01a3b | 224 | unsigned long long total_mem; |
5c3391f9 BW |
225 | unsigned long long crash_size, crash_base; |
226 | int ret; | |
227 | ||
18a01a3b | 228 | total_mem = ((unsigned long long)max_low_pfn - min_low_pfn) << PAGE_SHIFT; |
5c3391f9 | 229 | |
18a01a3b | 230 | ret = parse_crashkernel(boot_command_line, total_mem, |
5c3391f9 BW |
231 | &crash_size, &crash_base); |
232 | if (ret == 0 && crash_size) { | |
18a01a3b | 233 | if (crash_base <= 0) { |
5c3391f9 BW |
234 | printk(KERN_INFO "crashkernel reservation failed - " |
235 | "you have to specify a base address\n"); | |
18a01a3b BW |
236 | return; |
237 | } | |
238 | ||
239 | if (reserve_bootmem(crash_base, crash_size, | |
240 | BOOTMEM_EXCLUSIVE) < 0) { | |
241 | printk(KERN_INFO "crashkernel reservation failed - " | |
242 | "memory is in use\n"); | |
243 | return; | |
244 | } | |
245 | ||
246 | printk(KERN_INFO "Reserving %ldMB of memory at %ldMB " | |
247 | "for crashkernel (System RAM: %ldMB)\n", | |
248 | (unsigned long)(crash_size >> 20), | |
249 | (unsigned long)(crash_base >> 20), | |
250 | (unsigned long)(total_mem >> 20)); | |
251 | crashk_res.start = crash_base; | |
252 | crashk_res.end = crash_base + crash_size - 1; | |
3def3d6d | 253 | insert_resource(&iomem_resource, &crashk_res); |
5c3391f9 BW |
254 | } |
255 | } | |
256 | #else | |
257 | static inline void __init reserve_crashkernel(void) | |
258 | {} | |
259 | #endif | |
260 | ||
746ef0cd | 261 | /* Overridden in paravirt.c if CONFIG_PARAVIRT */ |
e3cfac84 | 262 | void __attribute__((weak)) __init memory_setup(void) |
746ef0cd GOC |
263 | { |
264 | machine_specific_memory_setup(); | |
265 | } | |
266 | ||
f212ec4b BK |
267 | /* |
268 | * setup_arch - architecture-specific boot-time initializations | |
269 | * | |
270 | * Note: On x86_64, fixmaps are ready for use even before this is called. | |
271 | */ | |
1da177e4 LT |
272 | void __init setup_arch(char **cmdline_p) |
273 | { | |
04e1ba85 TG |
274 | unsigned i; |
275 | ||
adf48856 | 276 | printk(KERN_INFO "Command line: %s\n", boot_command_line); |
43c85c9c | 277 | |
30c82645 PA |
278 | ROOT_DEV = old_decode_dev(boot_params.hdr.root_dev); |
279 | screen_info = boot_params.screen_info; | |
280 | edid_info = boot_params.edid_info; | |
281 | saved_video_mode = boot_params.hdr.vid_mode; | |
282 | bootloader_type = boot_params.hdr.type_of_loader; | |
1da177e4 LT |
283 | |
284 | #ifdef CONFIG_BLK_DEV_RAM | |
30c82645 PA |
285 | rd_image_start = boot_params.hdr.ram_size & RAMDISK_IMAGE_START_MASK; |
286 | rd_prompt = ((boot_params.hdr.ram_size & RAMDISK_PROMPT_FLAG) != 0); | |
287 | rd_doload = ((boot_params.hdr.ram_size & RAMDISK_LOAD_FLAG) != 0); | |
1da177e4 | 288 | #endif |
5b83683f HY |
289 | #ifdef CONFIG_EFI |
290 | if (!strncmp((char *)&boot_params.efi_info.efi_loader_signature, | |
291 | "EL64", 4)) | |
292 | efi_enabled = 1; | |
293 | #endif | |
746ef0cd GOC |
294 | |
295 | ARCH_SETUP | |
296 | ||
297 | memory_setup(); | |
1da177e4 LT |
298 | copy_edd(); |
299 | ||
30c82645 | 300 | if (!boot_params.hdr.root_flags) |
1da177e4 LT |
301 | root_mountflags &= ~MS_RDONLY; |
302 | init_mm.start_code = (unsigned long) &_text; | |
303 | init_mm.end_code = (unsigned long) &_etext; | |
304 | init_mm.end_data = (unsigned long) &_edata; | |
305 | init_mm.brk = (unsigned long) &_end; | |
306 | ||
e3ebadd9 LT |
307 | code_resource.start = virt_to_phys(&_text); |
308 | code_resource.end = virt_to_phys(&_etext)-1; | |
309 | data_resource.start = virt_to_phys(&_etext); | |
310 | data_resource.end = virt_to_phys(&_edata)-1; | |
00bf4098 BW |
311 | bss_resource.start = virt_to_phys(&__bss_start); |
312 | bss_resource.end = virt_to_phys(&__bss_stop)-1; | |
1da177e4 | 313 | |
1da177e4 LT |
314 | early_identify_cpu(&boot_cpu_data); |
315 | ||
adf48856 | 316 | strlcpy(command_line, boot_command_line, COMMAND_LINE_SIZE); |
2c8c0e6b AK |
317 | *cmdline_p = command_line; |
318 | ||
319 | parse_early_param(); | |
320 | ||
f212ec4b BK |
321 | #ifdef CONFIG_PROVIDE_OHCI1394_DMA_INIT |
322 | if (init_ohci1394_dma_early) | |
323 | init_ohci1394_dma_on_all_controllers(); | |
324 | #endif | |
325 | ||
2c8c0e6b | 326 | finish_e820_parsing(); |
9ca33eb6 | 327 | |
3def3d6d YL |
328 | /* after parse_early_param, so could debug it */ |
329 | insert_resource(&iomem_resource, &code_resource); | |
330 | insert_resource(&iomem_resource, &data_resource); | |
331 | insert_resource(&iomem_resource, &bss_resource); | |
332 | ||
aaf23042 YL |
333 | early_gart_iommu_check(); |
334 | ||
5cb248ab | 335 | e820_register_active_regions(0, 0, -1UL); |
1da177e4 LT |
336 | /* |
337 | * partially used pages are not usable - thus | |
338 | * we are rounding upwards: | |
339 | */ | |
340 | end_pfn = e820_end_of_ram(); | |
99fc8d42 JB |
341 | /* update e820 for memory not covered by WB MTRRs */ |
342 | mtrr_bp_init(); | |
343 | if (mtrr_trim_uncached_memory(end_pfn)) { | |
344 | e820_register_active_regions(0, 0, -1UL); | |
345 | end_pfn = e820_end_of_ram(); | |
346 | } | |
347 | ||
caff0710 | 348 | num_physpages = end_pfn; |
1da177e4 LT |
349 | |
350 | check_efer(); | |
351 | ||
cc615032 | 352 | max_pfn_mapped = init_memory_mapping(0, (max_pfn_mapped << PAGE_SHIFT)); |
5b83683f HY |
353 | if (efi_enabled) |
354 | efi_init(); | |
1da177e4 | 355 | |
2785c8d0 | 356 | vsmp_init(); |
2785c8d0 | 357 | |
f2d3efed AK |
358 | dmi_scan_machine(); |
359 | ||
b02aae9c RH |
360 | io_delay_init(); |
361 | ||
71fff5e6 | 362 | #ifdef CONFIG_SMP |
df3825c5 | 363 | /* setup to use the early static init tables during kernel startup */ |
3effef1f YL |
364 | x86_cpu_to_apicid_early_ptr = (void *)x86_cpu_to_apicid_init; |
365 | x86_bios_cpu_apicid_early_ptr = (void *)x86_bios_cpu_apicid_init; | |
e8c10ef9 | 366 | #ifdef CONFIG_NUMA |
3effef1f | 367 | x86_cpu_to_node_map_early_ptr = (void *)x86_cpu_to_node_map_init; |
71fff5e6 | 368 | #endif |
e8c10ef9 | 369 | #endif |
71fff5e6 | 370 | |
888ba6c6 | 371 | #ifdef CONFIG_ACPI |
1da177e4 LT |
372 | /* |
373 | * Initialize the ACPI boot-time table parser (gets the RSDP and SDT). | |
374 | * Call this early for SRAT node setup. | |
375 | */ | |
376 | acpi_boot_table_init(); | |
377 | #endif | |
378 | ||
caff0710 JB |
379 | /* How many end-of-memory variables you have, grandma! */ |
380 | max_low_pfn = end_pfn; | |
381 | max_pfn = end_pfn; | |
382 | high_memory = (void *)__va(end_pfn * PAGE_SIZE - 1) + 1; | |
383 | ||
5cb248ab MG |
384 | /* Remove active ranges so rediscovery with NUMA-awareness happens */ |
385 | remove_all_active_ranges(); | |
386 | ||
1da177e4 LT |
387 | #ifdef CONFIG_ACPI_NUMA |
388 | /* | |
389 | * Parse SRAT to discover nodes. | |
390 | */ | |
391 | acpi_numa_init(); | |
392 | #endif | |
393 | ||
2b97690f | 394 | #ifdef CONFIG_NUMA |
04e1ba85 | 395 | numa_initmem_init(0, end_pfn); |
1da177e4 | 396 | #else |
bbfceef4 | 397 | contig_initmem_init(0, end_pfn); |
1da177e4 LT |
398 | #endif |
399 | ||
75175278 | 400 | early_res_to_bootmem(); |
1da177e4 | 401 | |
673d5b43 | 402 | #ifdef CONFIG_ACPI_SLEEP |
1da177e4 | 403 | /* |
04e1ba85 | 404 | * Reserve low memory region for sleep support. |
1da177e4 | 405 | */ |
04e1ba85 TG |
406 | acpi_reserve_bootmem(); |
407 | #endif | |
5b83683f | 408 | |
a3828064 | 409 | if (efi_enabled) |
5b83683f | 410 | efi_reserve_bootmem(); |
5b83683f | 411 | |
04e1ba85 TG |
412 | /* |
413 | * Find and reserve possible boot-time SMP configuration: | |
414 | */ | |
1da177e4 | 415 | find_smp_config(); |
1da177e4 | 416 | #ifdef CONFIG_BLK_DEV_INITRD |
30c82645 PA |
417 | if (boot_params.hdr.type_of_loader && boot_params.hdr.ramdisk_image) { |
418 | unsigned long ramdisk_image = boot_params.hdr.ramdisk_image; | |
419 | unsigned long ramdisk_size = boot_params.hdr.ramdisk_size; | |
420 | unsigned long ramdisk_end = ramdisk_image + ramdisk_size; | |
421 | unsigned long end_of_mem = end_pfn << PAGE_SHIFT; | |
422 | ||
423 | if (ramdisk_end <= end_of_mem) { | |
424 | reserve_bootmem_generic(ramdisk_image, ramdisk_size); | |
425 | initrd_start = ramdisk_image + PAGE_OFFSET; | |
426 | initrd_end = initrd_start+ramdisk_size; | |
427 | } else { | |
75175278 AK |
428 | /* Assumes everything on node 0 */ |
429 | free_bootmem(ramdisk_image, ramdisk_size); | |
1da177e4 | 430 | printk(KERN_ERR "initrd extends beyond end of memory " |
30c82645 PA |
431 | "(0x%08lx > 0x%08lx)\ndisabling initrd\n", |
432 | ramdisk_end, end_of_mem); | |
1da177e4 LT |
433 | initrd_start = 0; |
434 | } | |
435 | } | |
436 | #endif | |
5c3391f9 | 437 | reserve_crashkernel(); |
138fe4e0 KR |
438 | |
439 | reserve_ibft_region(); | |
440 | ||
1da177e4 | 441 | paging_init(); |
e4026440 | 442 | map_vsyscall(); |
1da177e4 | 443 | |
dfa4698c | 444 | early_quirks(); |
1da177e4 | 445 | |
888ba6c6 | 446 | #ifdef CONFIG_ACPI |
1da177e4 LT |
447 | /* |
448 | * Read APIC and some other early information from ACPI tables. | |
449 | */ | |
450 | acpi_boot_init(); | |
451 | #endif | |
452 | ||
05b3cbd8 RT |
453 | init_cpu_to_node(); |
454 | ||
1da177e4 LT |
455 | /* |
456 | * get boot-time SMP configuration: | |
457 | */ | |
458 | if (smp_found_config) | |
459 | get_smp_config(); | |
460 | init_apic_mappings(); | |
3e35a0e5 | 461 | ioapic_init_mappings(); |
1da177e4 LT |
462 | |
463 | /* | |
fc986db4 | 464 | * We trust e820 completely. No explicit ROM probing in memory. |
04e1ba85 | 465 | */ |
3def3d6d | 466 | e820_reserve_resources(); |
e8eff5ac | 467 | e820_mark_nosave_regions(); |
1da177e4 | 468 | |
1da177e4 | 469 | /* request I/O space for devices used on all i[345]86 PCs */ |
9d0ef4fd | 470 | for (i = 0; i < ARRAY_SIZE(standard_io_resources); i++) |
1da177e4 | 471 | request_resource(&ioport_resource, &standard_io_resources[i]); |
1da177e4 | 472 | |
a1e97782 | 473 | e820_setup_gap(); |
1da177e4 | 474 | |
1da177e4 LT |
475 | #ifdef CONFIG_VT |
476 | #if defined(CONFIG_VGA_CONSOLE) | |
5b83683f HY |
477 | if (!efi_enabled || (efi_mem_type(0xa0000) != EFI_CONVENTIONAL_MEMORY)) |
478 | conswitchp = &vga_con; | |
1da177e4 LT |
479 | #elif defined(CONFIG_DUMMY_CONSOLE) |
480 | conswitchp = &dummy_con; | |
481 | #endif | |
482 | #endif | |
483 | } | |
484 | ||
e6982c67 | 485 | static int __cpuinit get_model_name(struct cpuinfo_x86 *c) |
1da177e4 LT |
486 | { |
487 | unsigned int *v; | |
488 | ||
ebfcaa96 | 489 | if (c->extended_cpuid_level < 0x80000004) |
1da177e4 LT |
490 | return 0; |
491 | ||
492 | v = (unsigned int *) c->x86_model_id; | |
493 | cpuid(0x80000002, &v[0], &v[1], &v[2], &v[3]); | |
494 | cpuid(0x80000003, &v[4], &v[5], &v[6], &v[7]); | |
495 | cpuid(0x80000004, &v[8], &v[9], &v[10], &v[11]); | |
496 | c->x86_model_id[48] = 0; | |
497 | return 1; | |
498 | } | |
499 | ||
500 | ||
e6982c67 | 501 | static void __cpuinit display_cacheinfo(struct cpuinfo_x86 *c) |
1da177e4 LT |
502 | { |
503 | unsigned int n, dummy, eax, ebx, ecx, edx; | |
504 | ||
ebfcaa96 | 505 | n = c->extended_cpuid_level; |
1da177e4 LT |
506 | |
507 | if (n >= 0x80000005) { | |
508 | cpuid(0x80000005, &dummy, &ebx, &ecx, &edx); | |
04e1ba85 TG |
509 | printk(KERN_INFO "CPU: L1 I Cache: %dK (%d bytes/line), " |
510 | "D cache %dK (%d bytes/line)\n", | |
511 | edx>>24, edx&0xFF, ecx>>24, ecx&0xFF); | |
512 | c->x86_cache_size = (ecx>>24) + (edx>>24); | |
1da177e4 LT |
513 | /* On K8 L1 TLB is inclusive, so don't count it */ |
514 | c->x86_tlbsize = 0; | |
515 | } | |
516 | ||
517 | if (n >= 0x80000006) { | |
518 | cpuid(0x80000006, &dummy, &ebx, &ecx, &edx); | |
519 | ecx = cpuid_ecx(0x80000006); | |
520 | c->x86_cache_size = ecx >> 16; | |
521 | c->x86_tlbsize += ((ebx >> 16) & 0xfff) + (ebx & 0xfff); | |
522 | ||
523 | printk(KERN_INFO "CPU: L2 Cache: %dK (%d bytes/line)\n", | |
524 | c->x86_cache_size, ecx & 0xFF); | |
525 | } | |
1da177e4 | 526 | if (n >= 0x80000008) { |
04e1ba85 | 527 | cpuid(0x80000008, &eax, &dummy, &dummy, &dummy); |
1da177e4 LT |
528 | c->x86_virt_bits = (eax >> 8) & 0xff; |
529 | c->x86_phys_bits = eax & 0xff; | |
530 | } | |
531 | } | |
532 | ||
3f098c26 | 533 | #ifdef CONFIG_NUMA |
08acb672 | 534 | static int __cpuinit nearby_node(int apicid) |
3f098c26 | 535 | { |
04e1ba85 TG |
536 | int i, node; |
537 | ||
3f098c26 | 538 | for (i = apicid - 1; i >= 0; i--) { |
04e1ba85 | 539 | node = apicid_to_node[i]; |
3f098c26 AK |
540 | if (node != NUMA_NO_NODE && node_online(node)) |
541 | return node; | |
542 | } | |
543 | for (i = apicid + 1; i < MAX_LOCAL_APIC; i++) { | |
04e1ba85 | 544 | node = apicid_to_node[i]; |
3f098c26 AK |
545 | if (node != NUMA_NO_NODE && node_online(node)) |
546 | return node; | |
547 | } | |
548 | return first_node(node_online_map); /* Shouldn't happen */ | |
549 | } | |
550 | #endif | |
551 | ||
63518644 AK |
552 | /* |
553 | * On a AMD dual core setup the lower bits of the APIC id distingush the cores. | |
554 | * Assumes number of cores is a power of two. | |
555 | */ | |
adb8daed | 556 | static void __cpuinit amd_detect_cmp(struct cpuinfo_x86 *c) |
63518644 AK |
557 | { |
558 | #ifdef CONFIG_SMP | |
b41e2939 | 559 | unsigned bits; |
3f098c26 | 560 | #ifdef CONFIG_NUMA |
f3fa8ebc | 561 | int cpu = smp_processor_id(); |
3f098c26 | 562 | int node = 0; |
60c1bc82 | 563 | unsigned apicid = hard_smp_processor_id(); |
3f098c26 | 564 | #endif |
a860b63c | 565 | bits = c->x86_coreid_bits; |
b41e2939 AK |
566 | |
567 | /* Low order bits define the core id (index of core in socket) */ | |
01aaea1a YL |
568 | c->cpu_core_id = c->initial_apicid & ((1 << bits)-1); |
569 | /* Convert the initial APIC ID into the socket ID */ | |
570 | c->phys_proc_id = c->initial_apicid >> bits; | |
63518644 AK |
571 | |
572 | #ifdef CONFIG_NUMA | |
04e1ba85 TG |
573 | node = c->phys_proc_id; |
574 | if (apicid_to_node[apicid] != NUMA_NO_NODE) | |
575 | node = apicid_to_node[apicid]; | |
576 | if (!node_online(node)) { | |
577 | /* Two possibilities here: | |
578 | - The CPU is missing memory and no node was created. | |
579 | In that case try picking one from a nearby CPU | |
580 | - The APIC IDs differ from the HyperTransport node IDs | |
581 | which the K8 northbridge parsing fills in. | |
582 | Assume they are all increased by a constant offset, | |
583 | but in the same order as the HT nodeids. | |
584 | If that doesn't result in a usable node fall back to the | |
585 | path for the previous case. */ | |
586 | ||
01aaea1a | 587 | int ht_nodeid = c->initial_apicid; |
04e1ba85 TG |
588 | |
589 | if (ht_nodeid >= 0 && | |
590 | apicid_to_node[ht_nodeid] != NUMA_NO_NODE) | |
591 | node = apicid_to_node[ht_nodeid]; | |
592 | /* Pick a nearby node */ | |
593 | if (!node_online(node)) | |
594 | node = nearby_node(apicid); | |
595 | } | |
69d81fcd | 596 | numa_set_node(cpu, node); |
3f098c26 | 597 | |
e42f9437 | 598 | printk(KERN_INFO "CPU %d/%x -> Node %d\n", cpu, apicid, node); |
63518644 | 599 | #endif |
63518644 AK |
600 | #endif |
601 | } | |
1da177e4 | 602 | |
2b16a235 | 603 | static void __cpuinit early_init_amd_mc(struct cpuinfo_x86 *c) |
a860b63c YL |
604 | { |
605 | #ifdef CONFIG_SMP | |
606 | unsigned bits, ecx; | |
607 | ||
608 | /* Multi core CPU? */ | |
609 | if (c->extended_cpuid_level < 0x80000008) | |
610 | return; | |
611 | ||
612 | ecx = cpuid_ecx(0x80000008); | |
613 | ||
614 | c->x86_max_cores = (ecx & 0xff) + 1; | |
615 | ||
616 | /* CPU telling us the core id bits shift? */ | |
617 | bits = (ecx >> 12) & 0xF; | |
618 | ||
619 | /* Otherwise recompute */ | |
620 | if (bits == 0) { | |
621 | while ((1 << bits) < c->x86_max_cores) | |
622 | bits++; | |
623 | } | |
624 | ||
625 | c->x86_coreid_bits = bits; | |
626 | ||
627 | #endif | |
628 | } | |
629 | ||
fb79d22e TG |
630 | #define ENABLE_C1E_MASK 0x18000000 |
631 | #define CPUID_PROCESSOR_SIGNATURE 1 | |
632 | #define CPUID_XFAM 0x0ff00000 | |
633 | #define CPUID_XFAM_K8 0x00000000 | |
634 | #define CPUID_XFAM_10H 0x00100000 | |
635 | #define CPUID_XFAM_11H 0x00200000 | |
636 | #define CPUID_XMOD 0x000f0000 | |
637 | #define CPUID_XMOD_REV_F 0x00040000 | |
638 | ||
639 | /* AMD systems with C1E don't have a working lAPIC timer. Check for that. */ | |
640 | static __cpuinit int amd_apic_timer_broken(void) | |
641 | { | |
04e1ba85 TG |
642 | u32 lo, hi, eax = cpuid_eax(CPUID_PROCESSOR_SIGNATURE); |
643 | ||
fb79d22e TG |
644 | switch (eax & CPUID_XFAM) { |
645 | case CPUID_XFAM_K8: | |
646 | if ((eax & CPUID_XMOD) < CPUID_XMOD_REV_F) | |
647 | break; | |
648 | case CPUID_XFAM_10H: | |
649 | case CPUID_XFAM_11H: | |
650 | rdmsr(MSR_K8_ENABLE_C1E, lo, hi); | |
651 | if (lo & ENABLE_C1E_MASK) | |
652 | return 1; | |
653 | break; | |
654 | default: | |
655 | /* err on the side of caution */ | |
656 | return 1; | |
657 | } | |
658 | return 0; | |
659 | } | |
660 | ||
2b16a235 AK |
661 | static void __cpuinit early_init_amd(struct cpuinfo_x86 *c) |
662 | { | |
663 | early_init_amd_mc(c); | |
664 | ||
665 | /* c->x86_power is 8000_0007 edx. Bit 8 is constant TSC */ | |
666 | if (c->x86_power & (1<<8)) | |
667 | set_cpu_cap(c, X86_FEATURE_CONSTANT_TSC); | |
668 | } | |
669 | ||
ed77504b | 670 | static void __cpuinit init_amd(struct cpuinfo_x86 *c) |
1da177e4 | 671 | { |
7bcd3f34 | 672 | unsigned level; |
1da177e4 | 673 | |
bc5e8fdf LT |
674 | #ifdef CONFIG_SMP |
675 | unsigned long value; | |
676 | ||
7d318d77 AK |
677 | /* |
678 | * Disable TLB flush filter by setting HWCR.FFDIS on K8 | |
679 | * bit 6 of msr C001_0015 | |
04e1ba85 | 680 | * |
7d318d77 AK |
681 | * Errata 63 for SH-B3 steppings |
682 | * Errata 122 for all steppings (F+ have it disabled by default) | |
683 | */ | |
684 | if (c->x86 == 15) { | |
685 | rdmsrl(MSR_K8_HWCR, value); | |
686 | value |= 1 << 6; | |
687 | wrmsrl(MSR_K8_HWCR, value); | |
688 | } | |
bc5e8fdf LT |
689 | #endif |
690 | ||
1da177e4 LT |
691 | /* Bit 31 in normal CPUID used for nonstandard 3DNow ID; |
692 | 3DNow is IDd by bit 31 in extended CPUID (1*32+31) anyway */ | |
9716951e | 693 | clear_cpu_cap(c, 0*32+31); |
04e1ba85 | 694 | |
7bcd3f34 AK |
695 | /* On C+ stepping K8 rep microcode works well for copy/memset */ |
696 | level = cpuid_eax(1); | |
04e1ba85 TG |
697 | if (c->x86 == 15 && ((level >= 0x0f48 && level < 0x0f50) || |
698 | level >= 0x0f58)) | |
53756d37 | 699 | set_cpu_cap(c, X86_FEATURE_REP_GOOD); |
99741faa | 700 | if (c->x86 == 0x10 || c->x86 == 0x11) |
53756d37 | 701 | set_cpu_cap(c, X86_FEATURE_REP_GOOD); |
7bcd3f34 | 702 | |
18bd057b AK |
703 | /* Enable workaround for FXSAVE leak */ |
704 | if (c->x86 >= 6) | |
53756d37 | 705 | set_cpu_cap(c, X86_FEATURE_FXSAVE_LEAK); |
18bd057b | 706 | |
e42f9437 RS |
707 | level = get_model_name(c); |
708 | if (!level) { | |
04e1ba85 | 709 | switch (c->x86) { |
1da177e4 LT |
710 | case 15: |
711 | /* Should distinguish Models here, but this is only | |
712 | a fallback anyways. */ | |
713 | strcpy(c->x86_model_id, "Hammer"); | |
04e1ba85 TG |
714 | break; |
715 | } | |
716 | } | |
1da177e4 LT |
717 | display_cacheinfo(c); |
718 | ||
faee9a5d AK |
719 | /* Multi core CPU? */ |
720 | if (c->extended_cpuid_level >= 0x80000008) | |
63518644 | 721 | amd_detect_cmp(c); |
1da177e4 | 722 | |
67cddd94 AK |
723 | if (c->extended_cpuid_level >= 0x80000006 && |
724 | (cpuid_edx(0x80000006) & 0xf000)) | |
725 | num_cache_leaves = 4; | |
726 | else | |
727 | num_cache_leaves = 3; | |
2049336f | 728 | |
0bd8acd1 | 729 | if (c->x86 == 0xf || c->x86 == 0x10 || c->x86 == 0x11) |
53756d37 | 730 | set_cpu_cap(c, X86_FEATURE_K8); |
0bd8acd1 | 731 | |
de421863 AK |
732 | /* MFENCE stops RDTSC speculation */ |
733 | set_cpu_cap(c, X86_FEATURE_MFENCE_RDTSC); | |
f039b754 | 734 | |
fb79d22e TG |
735 | if (amd_apic_timer_broken()) |
736 | disable_apic_timer = 1; | |
8346ea17 AK |
737 | |
738 | if (c == &boot_cpu_data && c->x86 >= 0xf && c->x86 <= 0x11) { | |
739 | unsigned long long tseg; | |
740 | ||
741 | /* | |
742 | * Split up direct mapping around the TSEG SMM area. | |
743 | * Don't do it for gbpages because there seems very little | |
744 | * benefit in doing so. | |
745 | */ | |
746 | if (!rdmsrl_safe(MSR_K8_TSEG_ADDR, &tseg) && | |
747 | (tseg >> PMD_SHIFT) < (max_pfn_mapped >> (PMD_SHIFT-PAGE_SHIFT))) | |
748 | set_memory_4k((unsigned long)__va(tseg), 1); | |
749 | } | |
1da177e4 LT |
750 | } |
751 | ||
1a53905a | 752 | void __cpuinit detect_ht(struct cpuinfo_x86 *c) |
1da177e4 LT |
753 | { |
754 | #ifdef CONFIG_SMP | |
04e1ba85 TG |
755 | u32 eax, ebx, ecx, edx; |
756 | int index_msb, core_bits; | |
94605eff SS |
757 | |
758 | cpuid(1, &eax, &ebx, &ecx, &edx); | |
759 | ||
94605eff | 760 | |
e42f9437 | 761 | if (!cpu_has(c, X86_FEATURE_HT)) |
1da177e4 | 762 | return; |
04e1ba85 | 763 | if (cpu_has(c, X86_FEATURE_CMP_LEGACY)) |
e42f9437 | 764 | goto out; |
1da177e4 | 765 | |
1da177e4 | 766 | smp_num_siblings = (ebx & 0xff0000) >> 16; |
94605eff | 767 | |
1da177e4 LT |
768 | if (smp_num_siblings == 1) { |
769 | printk(KERN_INFO "CPU: Hyper-Threading is disabled\n"); | |
04e1ba85 | 770 | } else if (smp_num_siblings > 1) { |
94605eff | 771 | |
1da177e4 | 772 | if (smp_num_siblings > NR_CPUS) { |
04e1ba85 TG |
773 | printk(KERN_WARNING "CPU: Unsupported number of " |
774 | "siblings %d", smp_num_siblings); | |
1da177e4 LT |
775 | smp_num_siblings = 1; |
776 | return; | |
777 | } | |
94605eff SS |
778 | |
779 | index_msb = get_count_order(smp_num_siblings); | |
f3fa8ebc | 780 | c->phys_proc_id = phys_pkg_id(index_msb); |
3dd9d514 | 781 | |
94605eff | 782 | smp_num_siblings = smp_num_siblings / c->x86_max_cores; |
3dd9d514 | 783 | |
04e1ba85 | 784 | index_msb = get_count_order(smp_num_siblings); |
94605eff SS |
785 | |
786 | core_bits = get_count_order(c->x86_max_cores); | |
3dd9d514 | 787 | |
f3fa8ebc | 788 | c->cpu_core_id = phys_pkg_id(index_msb) & |
94605eff | 789 | ((1 << core_bits) - 1); |
1da177e4 | 790 | } |
e42f9437 RS |
791 | out: |
792 | if ((c->x86_max_cores * smp_num_siblings) > 1) { | |
04e1ba85 TG |
793 | printk(KERN_INFO "CPU: Physical Processor ID: %d\n", |
794 | c->phys_proc_id); | |
795 | printk(KERN_INFO "CPU: Processor Core ID: %d\n", | |
796 | c->cpu_core_id); | |
e42f9437 RS |
797 | } |
798 | ||
1da177e4 LT |
799 | #endif |
800 | } | |
801 | ||
3dd9d514 AK |
802 | /* |
803 | * find out the number of processor cores on the die | |
804 | */ | |
e6982c67 | 805 | static int __cpuinit intel_num_cpu_cores(struct cpuinfo_x86 *c) |
3dd9d514 | 806 | { |
2bbc419f | 807 | unsigned int eax, t; |
3dd9d514 AK |
808 | |
809 | if (c->cpuid_level < 4) | |
810 | return 1; | |
811 | ||
2bbc419f | 812 | cpuid_count(4, 0, &eax, &t, &t, &t); |
3dd9d514 AK |
813 | |
814 | if (eax & 0x1f) | |
815 | return ((eax >> 26) + 1); | |
816 | else | |
817 | return 1; | |
818 | } | |
819 | ||
04d733bd | 820 | static void __cpuinit srat_detect_node(void) |
df0cc26b AK |
821 | { |
822 | #ifdef CONFIG_NUMA | |
ddea7be0 | 823 | unsigned node; |
df0cc26b | 824 | int cpu = smp_processor_id(); |
e42f9437 | 825 | int apicid = hard_smp_processor_id(); |
df0cc26b AK |
826 | |
827 | /* Don't do the funky fallback heuristics the AMD version employs | |
828 | for now. */ | |
e42f9437 | 829 | node = apicid_to_node[apicid]; |
475613b9 | 830 | if (node == NUMA_NO_NODE || !node_online(node)) |
0d015324 | 831 | node = first_node(node_online_map); |
69d81fcd | 832 | numa_set_node(cpu, node); |
df0cc26b | 833 | |
c31fbb1a | 834 | printk(KERN_INFO "CPU %d/%x -> Node %d\n", cpu, apicid, node); |
df0cc26b AK |
835 | #endif |
836 | } | |
837 | ||
2b16a235 AK |
838 | static void __cpuinit early_init_intel(struct cpuinfo_x86 *c) |
839 | { | |
840 | if ((c->x86 == 0xf && c->x86_model >= 0x03) || | |
841 | (c->x86 == 0x6 && c->x86_model >= 0x0e)) | |
9716951e | 842 | set_cpu_cap(c, X86_FEATURE_CONSTANT_TSC); |
2b16a235 AK |
843 | } |
844 | ||
e6982c67 | 845 | static void __cpuinit init_intel(struct cpuinfo_x86 *c) |
1da177e4 LT |
846 | { |
847 | /* Cache sizes */ | |
848 | unsigned n; | |
849 | ||
850 | init_intel_cacheinfo(c); | |
04e1ba85 | 851 | if (c->cpuid_level > 9) { |
0080e667 VP |
852 | unsigned eax = cpuid_eax(10); |
853 | /* Check for version and the number of counters */ | |
854 | if ((eax & 0xff) && (((eax>>8) & 0xff) > 1)) | |
53756d37 | 855 | set_cpu_cap(c, X86_FEATURE_ARCH_PERFMON); |
0080e667 VP |
856 | } |
857 | ||
36b2a8d5 SE |
858 | if (cpu_has_ds) { |
859 | unsigned int l1, l2; | |
860 | rdmsr(MSR_IA32_MISC_ENABLE, l1, l2); | |
ee58fad5 | 861 | if (!(l1 & (1<<11))) |
53756d37 | 862 | set_cpu_cap(c, X86_FEATURE_BTS); |
36b2a8d5 | 863 | if (!(l1 & (1<<12))) |
53756d37 | 864 | set_cpu_cap(c, X86_FEATURE_PEBS); |
36b2a8d5 SE |
865 | } |
866 | ||
eee3af4a MM |
867 | |
868 | if (cpu_has_bts) | |
869 | ds_init_intel(c); | |
870 | ||
ebfcaa96 | 871 | n = c->extended_cpuid_level; |
1da177e4 LT |
872 | if (n >= 0x80000008) { |
873 | unsigned eax = cpuid_eax(0x80000008); | |
874 | c->x86_virt_bits = (eax >> 8) & 0xff; | |
875 | c->x86_phys_bits = eax & 0xff; | |
af9c142d SL |
876 | /* CPUID workaround for Intel 0F34 CPU */ |
877 | if (c->x86_vendor == X86_VENDOR_INTEL && | |
878 | c->x86 == 0xF && c->x86_model == 0x3 && | |
879 | c->x86_mask == 0x4) | |
880 | c->x86_phys_bits = 36; | |
1da177e4 LT |
881 | } |
882 | ||
883 | if (c->x86 == 15) | |
884 | c->x86_cache_alignment = c->x86_clflush_size * 2; | |
27fbe5b2 | 885 | if (c->x86 == 6) |
53756d37 | 886 | set_cpu_cap(c, X86_FEATURE_REP_GOOD); |
707fa8ed | 887 | set_cpu_cap(c, X86_FEATURE_LFENCE_RDTSC); |
04e1ba85 | 888 | c->x86_max_cores = intel_num_cpu_cores(c); |
df0cc26b AK |
889 | |
890 | srat_detect_node(); | |
1da177e4 LT |
891 | } |
892 | ||
0e03eb86 DJ |
893 | static void __cpuinit early_init_centaur(struct cpuinfo_x86 *c) |
894 | { | |
895 | if (c->x86 == 0x6 && c->x86_model >= 0xf) | |
896 | set_bit(X86_FEATURE_CONSTANT_TSC, &c->x86_capability); | |
897 | } | |
898 | ||
899 | static void __cpuinit init_centaur(struct cpuinfo_x86 *c) | |
900 | { | |
901 | /* Cache sizes */ | |
902 | unsigned n; | |
903 | ||
904 | n = c->extended_cpuid_level; | |
905 | if (n >= 0x80000008) { | |
906 | unsigned eax = cpuid_eax(0x80000008); | |
907 | c->x86_virt_bits = (eax >> 8) & 0xff; | |
908 | c->x86_phys_bits = eax & 0xff; | |
909 | } | |
910 | ||
911 | if (c->x86 == 0x6 && c->x86_model >= 0xf) { | |
912 | c->x86_cache_alignment = c->x86_clflush_size * 2; | |
913 | set_cpu_cap(c, X86_FEATURE_CONSTANT_TSC); | |
914 | set_cpu_cap(c, X86_FEATURE_REP_GOOD); | |
915 | } | |
916 | set_cpu_cap(c, X86_FEATURE_LFENCE_RDTSC); | |
917 | } | |
918 | ||
672289e9 | 919 | static void __cpuinit get_cpu_vendor(struct cpuinfo_x86 *c) |
1da177e4 LT |
920 | { |
921 | char *v = c->x86_vendor_id; | |
922 | ||
923 | if (!strcmp(v, "AuthenticAMD")) | |
924 | c->x86_vendor = X86_VENDOR_AMD; | |
925 | else if (!strcmp(v, "GenuineIntel")) | |
926 | c->x86_vendor = X86_VENDOR_INTEL; | |
0e03eb86 DJ |
927 | else if (!strcmp(v, "CentaurHauls")) |
928 | c->x86_vendor = X86_VENDOR_CENTAUR; | |
1da177e4 LT |
929 | else |
930 | c->x86_vendor = X86_VENDOR_UNKNOWN; | |
931 | } | |
932 | ||
1da177e4 LT |
933 | /* Do some early cpuid on the boot CPU to get some parameter that are |
934 | needed before check_bugs. Everything advanced is in identify_cpu | |
935 | below. */ | |
8c61b900 | 936 | static void __cpuinit early_identify_cpu(struct cpuinfo_x86 *c) |
1da177e4 | 937 | { |
a860b63c | 938 | u32 tfms, xlvl; |
1da177e4 LT |
939 | |
940 | c->loops_per_jiffy = loops_per_jiffy; | |
941 | c->x86_cache_size = -1; | |
942 | c->x86_vendor = X86_VENDOR_UNKNOWN; | |
943 | c->x86_model = c->x86_mask = 0; /* So far unknown... */ | |
944 | c->x86_vendor_id[0] = '\0'; /* Unset */ | |
945 | c->x86_model_id[0] = '\0'; /* Unset */ | |
946 | c->x86_clflush_size = 64; | |
947 | c->x86_cache_alignment = c->x86_clflush_size; | |
94605eff | 948 | c->x86_max_cores = 1; |
a860b63c | 949 | c->x86_coreid_bits = 0; |
ebfcaa96 | 950 | c->extended_cpuid_level = 0; |
1da177e4 LT |
951 | memset(&c->x86_capability, 0, sizeof c->x86_capability); |
952 | ||
953 | /* Get vendor name */ | |
954 | cpuid(0x00000000, (unsigned int *)&c->cpuid_level, | |
955 | (unsigned int *)&c->x86_vendor_id[0], | |
956 | (unsigned int *)&c->x86_vendor_id[8], | |
957 | (unsigned int *)&c->x86_vendor_id[4]); | |
04e1ba85 | 958 | |
1da177e4 LT |
959 | get_cpu_vendor(c); |
960 | ||
961 | /* Initialize the standard set of capabilities */ | |
962 | /* Note that the vendor-specific code below might override */ | |
963 | ||
964 | /* Intel-defined flags: level 0x00000001 */ | |
965 | if (c->cpuid_level >= 0x00000001) { | |
966 | __u32 misc; | |
967 | cpuid(0x00000001, &tfms, &misc, &c->x86_capability[4], | |
968 | &c->x86_capability[0]); | |
969 | c->x86 = (tfms >> 8) & 0xf; | |
970 | c->x86_model = (tfms >> 4) & 0xf; | |
971 | c->x86_mask = tfms & 0xf; | |
f5f786d0 | 972 | if (c->x86 == 0xf) |
1da177e4 | 973 | c->x86 += (tfms >> 20) & 0xff; |
f5f786d0 | 974 | if (c->x86 >= 0x6) |
1da177e4 | 975 | c->x86_model += ((tfms >> 16) & 0xF) << 4; |
9716951e | 976 | if (test_cpu_cap(c, X86_FEATURE_CLFLSH)) |
1da177e4 | 977 | c->x86_clflush_size = ((misc >> 8) & 0xff) * 8; |
1da177e4 LT |
978 | } else { |
979 | /* Have CPUID level 0 only - unheard of */ | |
980 | c->x86 = 4; | |
981 | } | |
a158608b | 982 | |
01aaea1a | 983 | c->initial_apicid = (cpuid_ebx(1) >> 24) & 0xff; |
a158608b | 984 | #ifdef CONFIG_SMP |
01aaea1a | 985 | c->phys_proc_id = c->initial_apicid; |
a158608b | 986 | #endif |
1da177e4 LT |
987 | /* AMD-defined flags: level 0x80000001 */ |
988 | xlvl = cpuid_eax(0x80000000); | |
ebfcaa96 | 989 | c->extended_cpuid_level = xlvl; |
1da177e4 LT |
990 | if ((xlvl & 0xffff0000) == 0x80000000) { |
991 | if (xlvl >= 0x80000001) { | |
992 | c->x86_capability[1] = cpuid_edx(0x80000001); | |
5b7abc6f | 993 | c->x86_capability[6] = cpuid_ecx(0x80000001); |
1da177e4 LT |
994 | } |
995 | if (xlvl >= 0x80000004) | |
996 | get_model_name(c); /* Default name */ | |
997 | } | |
998 | ||
999 | /* Transmeta-defined flags: level 0x80860001 */ | |
1000 | xlvl = cpuid_eax(0x80860000); | |
1001 | if ((xlvl & 0xffff0000) == 0x80860000) { | |
1002 | /* Don't set x86_cpuid_level here for now to not confuse. */ | |
1003 | if (xlvl >= 0x80860001) | |
1004 | c->x86_capability[2] = cpuid_edx(0x80860001); | |
1005 | } | |
1006 | ||
9566e91d AH |
1007 | c->extended_cpuid_level = cpuid_eax(0x80000000); |
1008 | if (c->extended_cpuid_level >= 0x80000007) | |
1009 | c->x86_power = cpuid_edx(0x80000007); | |
1010 | ||
9307caca YL |
1011 | |
1012 | clear_cpu_cap(c, X86_FEATURE_PAT); | |
1013 | ||
a860b63c YL |
1014 | switch (c->x86_vendor) { |
1015 | case X86_VENDOR_AMD: | |
1016 | early_init_amd(c); | |
9307caca YL |
1017 | if (c->x86 >= 0xf && c->x86 <= 0x11) |
1018 | set_cpu_cap(c, X86_FEATURE_PAT); | |
a860b63c | 1019 | break; |
71617bf1 YL |
1020 | case X86_VENDOR_INTEL: |
1021 | early_init_intel(c); | |
9307caca YL |
1022 | if (c->x86 == 0xF || (c->x86 == 6 && c->x86_model >= 15)) |
1023 | set_cpu_cap(c, X86_FEATURE_PAT); | |
71617bf1 | 1024 | break; |
0e03eb86 DJ |
1025 | case X86_VENDOR_CENTAUR: |
1026 | early_init_centaur(c); | |
1027 | break; | |
a860b63c YL |
1028 | } |
1029 | ||
1030 | } | |
1031 | ||
1032 | /* | |
1033 | * This does the hard work of actually picking apart the CPU stuff... | |
1034 | */ | |
1035 | void __cpuinit identify_cpu(struct cpuinfo_x86 *c) | |
1036 | { | |
1037 | int i; | |
1038 | ||
1039 | early_identify_cpu(c); | |
1040 | ||
1d67953f VP |
1041 | init_scattered_cpuid_features(c); |
1042 | ||
1e9f28fa SS |
1043 | c->apicid = phys_pkg_id(0); |
1044 | ||
1da177e4 LT |
1045 | /* |
1046 | * Vendor-specific initialization. In this section we | |
1047 | * canonicalize the feature flags, meaning if there are | |
1048 | * features a certain CPU supports which CPUID doesn't | |
1049 | * tell us, CPUID claiming incorrect flags, or other bugs, | |
1050 | * we handle them here. | |
1051 | * | |
1052 | * At the end of this section, c->x86_capability better | |
1053 | * indicate the features this CPU genuinely supports! | |
1054 | */ | |
1055 | switch (c->x86_vendor) { | |
1056 | case X86_VENDOR_AMD: | |
1057 | init_amd(c); | |
1058 | break; | |
1059 | ||
1060 | case X86_VENDOR_INTEL: | |
1061 | init_intel(c); | |
1062 | break; | |
1063 | ||
0e03eb86 DJ |
1064 | case X86_VENDOR_CENTAUR: |
1065 | init_centaur(c); | |
1066 | break; | |
1067 | ||
1da177e4 LT |
1068 | case X86_VENDOR_UNKNOWN: |
1069 | default: | |
1070 | display_cacheinfo(c); | |
1071 | break; | |
1072 | } | |
1073 | ||
04e1ba85 | 1074 | detect_ht(c); |
1da177e4 LT |
1075 | |
1076 | /* | |
1077 | * On SMP, boot_cpu_data holds the common feature set between | |
1078 | * all CPUs; so make sure that we indicate which features are | |
1079 | * common between the CPUs. The first time this routine gets | |
1080 | * executed, c == &boot_cpu_data. | |
1081 | */ | |
1082 | if (c != &boot_cpu_data) { | |
1083 | /* AND the already accumulated flags with these */ | |
04e1ba85 | 1084 | for (i = 0; i < NCAPINTS; i++) |
1da177e4 LT |
1085 | boot_cpu_data.x86_capability[i] &= c->x86_capability[i]; |
1086 | } | |
1087 | ||
7d851c8d AK |
1088 | /* Clear all flags overriden by options */ |
1089 | for (i = 0; i < NCAPINTS; i++) | |
12c247a6 | 1090 | c->x86_capability[i] &= ~cleared_cpu_caps[i]; |
7d851c8d | 1091 | |
1da177e4 LT |
1092 | #ifdef CONFIG_X86_MCE |
1093 | mcheck_init(c); | |
1094 | #endif | |
74ff305b HS |
1095 | select_idle_routine(c); |
1096 | ||
1da177e4 | 1097 | #ifdef CONFIG_NUMA |
3019e8eb | 1098 | numa_add_cpu(smp_processor_id()); |
1da177e4 | 1099 | #endif |
2b16a235 | 1100 | |
1da177e4 | 1101 | } |
1da177e4 | 1102 | |
7a636af6 GOC |
1103 | void __cpuinit identify_boot_cpu(void) |
1104 | { | |
1105 | identify_cpu(&boot_cpu_data); | |
1106 | } | |
1107 | ||
1108 | void __cpuinit identify_secondary_cpu(struct cpuinfo_x86 *c) | |
1109 | { | |
1110 | BUG_ON(c == &boot_cpu_data); | |
1111 | identify_cpu(c); | |
1112 | mtrr_ap_init(); | |
1113 | } | |
1114 | ||
191679fd AK |
1115 | static __init int setup_noclflush(char *arg) |
1116 | { | |
1117 | setup_clear_cpu_cap(X86_FEATURE_CLFLSH); | |
1118 | return 1; | |
1119 | } | |
1120 | __setup("noclflush", setup_noclflush); | |
1121 | ||
e6982c67 | 1122 | void __cpuinit print_cpu_info(struct cpuinfo_x86 *c) |
1da177e4 LT |
1123 | { |
1124 | if (c->x86_model_id[0]) | |
d8ff0bbf | 1125 | printk(KERN_CONT "%s", c->x86_model_id); |
1da177e4 | 1126 | |
04e1ba85 TG |
1127 | if (c->x86_mask || c->cpuid_level >= 0) |
1128 | printk(KERN_CONT " stepping %02x\n", c->x86_mask); | |
1da177e4 | 1129 | else |
04e1ba85 | 1130 | printk(KERN_CONT "\n"); |
1da177e4 LT |
1131 | } |
1132 | ||
ac72e788 AK |
1133 | static __init int setup_disablecpuid(char *arg) |
1134 | { | |
1135 | int bit; | |
1136 | if (get_option(&arg, &bit) && bit < NCAPINTS*32) | |
1137 | setup_clear_cpu_cap(bit); | |
1138 | else | |
1139 | return 0; | |
1140 | return 1; | |
1141 | } | |
1142 | __setup("clearcpuid=", setup_disablecpuid); |