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Commit | Line | Data |
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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> | |
eee206c3 | 32 | #include <asm/pci-direct.h> |
5b83683f | 33 | #include <linux/efi.h> |
1da177e4 LT |
34 | #include <linux/acpi.h> |
35 | #include <linux/kallsyms.h> | |
36 | #include <linux/edd.h> | |
138fe4e0 | 37 | #include <linux/iscsi_ibft.h> |
bbfceef4 | 38 | #include <linux/mmzone.h> |
5f5609df | 39 | #include <linux/kexec.h> |
95235ca2 | 40 | #include <linux/cpufreq.h> |
e9928674 | 41 | #include <linux/dmi.h> |
17a941d8 | 42 | #include <linux/dma-mapping.h> |
681558fd | 43 | #include <linux/ctype.h> |
eee206c3 | 44 | #include <linux/sort.h> |
746ef0cd | 45 | #include <linux/uaccess.h> |
f212ec4b | 46 | #include <linux/init_ohci1394_dma.h> |
790c73f6 | 47 | #include <linux/kvm_para.h> |
bbfceef4 | 48 | |
1da177e4 LT |
49 | #include <asm/mtrr.h> |
50 | #include <asm/uaccess.h> | |
51 | #include <asm/system.h> | |
e4026440 | 52 | #include <asm/vsyscall.h> |
1da177e4 LT |
53 | #include <asm/io.h> |
54 | #include <asm/smp.h> | |
55 | #include <asm/msr.h> | |
56 | #include <asm/desc.h> | |
57 | #include <video/edid.h> | |
58 | #include <asm/e820.h> | |
59 | #include <asm/dma.h> | |
aaf23042 | 60 | #include <asm/gart.h> |
1da177e4 LT |
61 | #include <asm/mpspec.h> |
62 | #include <asm/mmu_context.h> | |
1da177e4 LT |
63 | #include <asm/proto.h> |
64 | #include <asm/setup.h> | |
1da177e4 | 65 | #include <asm/numa.h> |
2bc0414e | 66 | #include <asm/sections.h> |
f2d3efed | 67 | #include <asm/dmi.h> |
00bf4098 | 68 | #include <asm/cacheflush.h> |
af7a78e9 | 69 | #include <asm/mce.h> |
eee3af4a | 70 | #include <asm/ds.h> |
df3825c5 | 71 | #include <asm/topology.h> |
e44b7b75 | 72 | #include <asm/trampoline.h> |
8d4a4300 | 73 | #include <asm/pat.h> |
1da177e4 | 74 | |
dd46e3ca | 75 | #include <mach_apic.h> |
746ef0cd GOC |
76 | #ifdef CONFIG_PARAVIRT |
77 | #include <asm/paravirt.h> | |
78 | #else | |
79 | #define ARCH_SETUP | |
80 | #endif | |
81 | ||
1da177e4 LT |
82 | /* |
83 | * Machine setup.. | |
84 | */ | |
85 | ||
6c231b7b | 86 | struct cpuinfo_x86 boot_cpu_data __read_mostly; |
2ee60e17 | 87 | EXPORT_SYMBOL(boot_cpu_data); |
1da177e4 | 88 | |
7d851c8d AK |
89 | __u32 cleared_cpu_caps[NCAPINTS] __cpuinitdata; |
90 | ||
1da177e4 LT |
91 | unsigned long mmu_cr4_features; |
92 | ||
1da177e4 LT |
93 | /* Boot loader ID as an integer, for the benefit of proc_dointvec */ |
94 | int bootloader_type; | |
95 | ||
96 | unsigned long saved_video_mode; | |
97 | ||
f039b754 AK |
98 | int force_mwait __cpuinitdata; |
99 | ||
04e1ba85 | 100 | /* |
f2d3efed AK |
101 | * Early DMI memory |
102 | */ | |
103 | int dmi_alloc_index; | |
104 | char dmi_alloc_data[DMI_MAX_DATA]; | |
105 | ||
1da177e4 LT |
106 | /* |
107 | * Setup options | |
108 | */ | |
1da177e4 | 109 | struct screen_info screen_info; |
2ee60e17 | 110 | EXPORT_SYMBOL(screen_info); |
1da177e4 LT |
111 | struct sys_desc_table_struct { |
112 | unsigned short length; | |
113 | unsigned char table[0]; | |
114 | }; | |
115 | ||
116 | struct edid_info edid_info; | |
ba70710e | 117 | EXPORT_SYMBOL_GPL(edid_info); |
1da177e4 LT |
118 | |
119 | extern int root_mountflags; | |
1da177e4 | 120 | |
adf48856 | 121 | char __initdata command_line[COMMAND_LINE_SIZE]; |
1da177e4 | 122 | |
a2b4bd9c | 123 | static struct resource standard_io_resources[] = { |
1da177e4 LT |
124 | { .name = "dma1", .start = 0x00, .end = 0x1f, |
125 | .flags = IORESOURCE_BUSY | IORESOURCE_IO }, | |
126 | { .name = "pic1", .start = 0x20, .end = 0x21, | |
127 | .flags = IORESOURCE_BUSY | IORESOURCE_IO }, | |
128 | { .name = "timer0", .start = 0x40, .end = 0x43, | |
129 | .flags = IORESOURCE_BUSY | IORESOURCE_IO }, | |
130 | { .name = "timer1", .start = 0x50, .end = 0x53, | |
131 | .flags = IORESOURCE_BUSY | IORESOURCE_IO }, | |
9096bd7a HW |
132 | { .name = "keyboard", .start = 0x60, .end = 0x60, |
133 | .flags = IORESOURCE_BUSY | IORESOURCE_IO }, | |
134 | { .name = "keyboard", .start = 0x64, .end = 0x64, | |
1da177e4 LT |
135 | .flags = IORESOURCE_BUSY | IORESOURCE_IO }, |
136 | { .name = "dma page reg", .start = 0x80, .end = 0x8f, | |
137 | .flags = IORESOURCE_BUSY | IORESOURCE_IO }, | |
138 | { .name = "pic2", .start = 0xa0, .end = 0xa1, | |
139 | .flags = IORESOURCE_BUSY | IORESOURCE_IO }, | |
140 | { .name = "dma2", .start = 0xc0, .end = 0xdf, | |
141 | .flags = IORESOURCE_BUSY | IORESOURCE_IO }, | |
142 | { .name = "fpu", .start = 0xf0, .end = 0xff, | |
143 | .flags = IORESOURCE_BUSY | IORESOURCE_IO } | |
144 | }; | |
145 | ||
1da177e4 LT |
146 | #define IORESOURCE_RAM (IORESOURCE_BUSY | IORESOURCE_MEM) |
147 | ||
c9cce83d | 148 | static struct resource data_resource = { |
1da177e4 LT |
149 | .name = "Kernel data", |
150 | .start = 0, | |
151 | .end = 0, | |
152 | .flags = IORESOURCE_RAM, | |
153 | }; | |
c9cce83d | 154 | static struct resource code_resource = { |
1da177e4 LT |
155 | .name = "Kernel code", |
156 | .start = 0, | |
157 | .end = 0, | |
158 | .flags = IORESOURCE_RAM, | |
159 | }; | |
c9cce83d | 160 | static struct resource bss_resource = { |
00bf4098 BW |
161 | .name = "Kernel bss", |
162 | .start = 0, | |
163 | .end = 0, | |
164 | .flags = IORESOURCE_RAM, | |
165 | }; | |
1da177e4 | 166 | |
8c61b900 TG |
167 | static void __cpuinit early_identify_cpu(struct cpuinfo_x86 *c); |
168 | ||
2c8c0e6b AK |
169 | #ifdef CONFIG_PROC_VMCORE |
170 | /* elfcorehdr= specifies the location of elf core header | |
171 | * stored by the crashed kernel. This option will be passed | |
172 | * by kexec loader to the capture kernel. | |
173 | */ | |
174 | static int __init setup_elfcorehdr(char *arg) | |
681558fd | 175 | { |
2c8c0e6b AK |
176 | char *end; |
177 | if (!arg) | |
178 | return -EINVAL; | |
179 | elfcorehdr_addr = memparse(arg, &end); | |
180 | return end > arg ? 0 : -EINVAL; | |
681558fd | 181 | } |
2c8c0e6b | 182 | early_param("elfcorehdr", setup_elfcorehdr); |
e2c03888 AK |
183 | #endif |
184 | ||
2b97690f | 185 | #ifndef CONFIG_NUMA |
bbfceef4 MT |
186 | static void __init |
187 | contig_initmem_init(unsigned long start_pfn, unsigned long end_pfn) | |
1da177e4 | 188 | { |
bbfceef4 MT |
189 | unsigned long bootmap_size, bootmap; |
190 | ||
bbfceef4 | 191 | bootmap_size = bootmem_bootmap_pages(end_pfn)<<PAGE_SHIFT; |
24a5da73 YL |
192 | bootmap = find_e820_area(0, end_pfn<<PAGE_SHIFT, bootmap_size, |
193 | PAGE_SIZE); | |
bbfceef4 | 194 | if (bootmap == -1L) |
04e1ba85 | 195 | panic("Cannot find bootmem map of size %ld\n", bootmap_size); |
bbfceef4 | 196 | bootmap_size = init_bootmem(bootmap >> PAGE_SHIFT, end_pfn); |
5cb248ab MG |
197 | e820_register_active_regions(0, start_pfn, end_pfn); |
198 | free_bootmem_with_active_regions(0, end_pfn); | |
1a27fc0a | 199 | early_res_to_bootmem(0, end_pfn<<PAGE_SHIFT); |
72a7fe39 | 200 | reserve_bootmem(bootmap, bootmap_size, BOOTMEM_DEFAULT); |
04e1ba85 | 201 | } |
1da177e4 LT |
202 | #endif |
203 | ||
1da177e4 LT |
204 | #if defined(CONFIG_EDD) || defined(CONFIG_EDD_MODULE) |
205 | struct edd edd; | |
206 | #ifdef CONFIG_EDD_MODULE | |
207 | EXPORT_SYMBOL(edd); | |
208 | #endif | |
209 | /** | |
210 | * copy_edd() - Copy the BIOS EDD information | |
211 | * from boot_params into a safe place. | |
212 | * | |
213 | */ | |
214 | static inline void copy_edd(void) | |
215 | { | |
30c82645 PA |
216 | memcpy(edd.mbr_signature, boot_params.edd_mbr_sig_buffer, |
217 | sizeof(edd.mbr_signature)); | |
218 | memcpy(edd.edd_info, boot_params.eddbuf, sizeof(edd.edd_info)); | |
219 | edd.mbr_signature_nr = boot_params.edd_mbr_sig_buf_entries; | |
220 | edd.edd_info_nr = boot_params.eddbuf_entries; | |
1da177e4 LT |
221 | } |
222 | #else | |
223 | static inline void copy_edd(void) | |
224 | { | |
225 | } | |
226 | #endif | |
227 | ||
5c3391f9 BW |
228 | #ifdef CONFIG_KEXEC |
229 | static void __init reserve_crashkernel(void) | |
230 | { | |
18a01a3b | 231 | unsigned long long total_mem; |
5c3391f9 BW |
232 | unsigned long long crash_size, crash_base; |
233 | int ret; | |
234 | ||
18a01a3b | 235 | total_mem = ((unsigned long long)max_low_pfn - min_low_pfn) << PAGE_SHIFT; |
5c3391f9 | 236 | |
18a01a3b | 237 | ret = parse_crashkernel(boot_command_line, total_mem, |
5c3391f9 BW |
238 | &crash_size, &crash_base); |
239 | if (ret == 0 && crash_size) { | |
18a01a3b | 240 | if (crash_base <= 0) { |
5c3391f9 BW |
241 | printk(KERN_INFO "crashkernel reservation failed - " |
242 | "you have to specify a base address\n"); | |
18a01a3b BW |
243 | return; |
244 | } | |
245 | ||
246 | if (reserve_bootmem(crash_base, crash_size, | |
247 | BOOTMEM_EXCLUSIVE) < 0) { | |
248 | printk(KERN_INFO "crashkernel reservation failed - " | |
249 | "memory is in use\n"); | |
250 | return; | |
251 | } | |
252 | ||
253 | printk(KERN_INFO "Reserving %ldMB of memory at %ldMB " | |
254 | "for crashkernel (System RAM: %ldMB)\n", | |
255 | (unsigned long)(crash_size >> 20), | |
256 | (unsigned long)(crash_base >> 20), | |
257 | (unsigned long)(total_mem >> 20)); | |
258 | crashk_res.start = crash_base; | |
259 | crashk_res.end = crash_base + crash_size - 1; | |
3def3d6d | 260 | insert_resource(&iomem_resource, &crashk_res); |
5c3391f9 BW |
261 | } |
262 | } | |
263 | #else | |
264 | static inline void __init reserve_crashkernel(void) | |
265 | {} | |
266 | #endif | |
267 | ||
746ef0cd | 268 | /* Overridden in paravirt.c if CONFIG_PARAVIRT */ |
e3cfac84 | 269 | void __attribute__((weak)) __init memory_setup(void) |
746ef0cd GOC |
270 | { |
271 | machine_specific_memory_setup(); | |
272 | } | |
273 | ||
8b664aa6 HY |
274 | static void __init parse_setup_data(void) |
275 | { | |
276 | struct setup_data *data; | |
277 | unsigned long pa_data; | |
278 | ||
279 | if (boot_params.hdr.version < 0x0209) | |
280 | return; | |
281 | pa_data = boot_params.hdr.setup_data; | |
282 | while (pa_data) { | |
283 | data = early_ioremap(pa_data, PAGE_SIZE); | |
284 | switch (data->type) { | |
285 | default: | |
286 | break; | |
287 | } | |
c14b2adf | 288 | #ifndef CONFIG_DEBUG_BOOT_PARAMS |
8b664aa6 | 289 | free_early(pa_data, pa_data+sizeof(*data)+data->len); |
c14b2adf | 290 | #endif |
8b664aa6 HY |
291 | pa_data = data->next; |
292 | early_iounmap(data, PAGE_SIZE); | |
293 | } | |
294 | } | |
295 | ||
5f0b2976 YL |
296 | #ifdef CONFIG_PCI_MMCONFIG |
297 | extern void __cpuinit fam10h_check_enable_mmcfg(void); | |
298 | extern void __init check_enable_amd_mmconf_dmi(void); | |
299 | #else | |
300 | void __cpuinit fam10h_check_enable_mmcfg(void) | |
301 | { | |
302 | } | |
303 | void __init check_enable_amd_mmconf_dmi(void) | |
304 | { | |
305 | } | |
306 | #endif | |
307 | ||
f212ec4b BK |
308 | /* |
309 | * setup_arch - architecture-specific boot-time initializations | |
310 | * | |
311 | * Note: On x86_64, fixmaps are ready for use even before this is called. | |
312 | */ | |
1da177e4 LT |
313 | void __init setup_arch(char **cmdline_p) |
314 | { | |
04e1ba85 TG |
315 | unsigned i; |
316 | ||
adf48856 | 317 | printk(KERN_INFO "Command line: %s\n", boot_command_line); |
43c85c9c | 318 | |
30c82645 PA |
319 | ROOT_DEV = old_decode_dev(boot_params.hdr.root_dev); |
320 | screen_info = boot_params.screen_info; | |
321 | edid_info = boot_params.edid_info; | |
322 | saved_video_mode = boot_params.hdr.vid_mode; | |
323 | bootloader_type = boot_params.hdr.type_of_loader; | |
1da177e4 LT |
324 | |
325 | #ifdef CONFIG_BLK_DEV_RAM | |
30c82645 PA |
326 | rd_image_start = boot_params.hdr.ram_size & RAMDISK_IMAGE_START_MASK; |
327 | rd_prompt = ((boot_params.hdr.ram_size & RAMDISK_PROMPT_FLAG) != 0); | |
328 | rd_doload = ((boot_params.hdr.ram_size & RAMDISK_LOAD_FLAG) != 0); | |
1da177e4 | 329 | #endif |
5b83683f HY |
330 | #ifdef CONFIG_EFI |
331 | if (!strncmp((char *)&boot_params.efi_info.efi_loader_signature, | |
332 | "EL64", 4)) | |
333 | efi_enabled = 1; | |
334 | #endif | |
746ef0cd GOC |
335 | |
336 | ARCH_SETUP | |
337 | ||
338 | memory_setup(); | |
1da177e4 LT |
339 | copy_edd(); |
340 | ||
30c82645 | 341 | if (!boot_params.hdr.root_flags) |
1da177e4 LT |
342 | root_mountflags &= ~MS_RDONLY; |
343 | init_mm.start_code = (unsigned long) &_text; | |
344 | init_mm.end_code = (unsigned long) &_etext; | |
345 | init_mm.end_data = (unsigned long) &_edata; | |
346 | init_mm.brk = (unsigned long) &_end; | |
347 | ||
e3ebadd9 LT |
348 | code_resource.start = virt_to_phys(&_text); |
349 | code_resource.end = virt_to_phys(&_etext)-1; | |
350 | data_resource.start = virt_to_phys(&_etext); | |
351 | data_resource.end = virt_to_phys(&_edata)-1; | |
00bf4098 BW |
352 | bss_resource.start = virt_to_phys(&__bss_start); |
353 | bss_resource.end = virt_to_phys(&__bss_stop)-1; | |
1da177e4 | 354 | |
1da177e4 LT |
355 | early_identify_cpu(&boot_cpu_data); |
356 | ||
adf48856 | 357 | strlcpy(command_line, boot_command_line, COMMAND_LINE_SIZE); |
2c8c0e6b AK |
358 | *cmdline_p = command_line; |
359 | ||
8b664aa6 HY |
360 | parse_setup_data(); |
361 | ||
2c8c0e6b AK |
362 | parse_early_param(); |
363 | ||
f212ec4b BK |
364 | #ifdef CONFIG_PROVIDE_OHCI1394_DMA_INIT |
365 | if (init_ohci1394_dma_early) | |
366 | init_ohci1394_dma_on_all_controllers(); | |
367 | #endif | |
368 | ||
2c8c0e6b | 369 | finish_e820_parsing(); |
9ca33eb6 | 370 | |
3def3d6d YL |
371 | /* after parse_early_param, so could debug it */ |
372 | insert_resource(&iomem_resource, &code_resource); | |
373 | insert_resource(&iomem_resource, &data_resource); | |
374 | insert_resource(&iomem_resource, &bss_resource); | |
375 | ||
aaf23042 YL |
376 | early_gart_iommu_check(); |
377 | ||
5cb248ab | 378 | e820_register_active_regions(0, 0, -1UL); |
1da177e4 LT |
379 | /* |
380 | * partially used pages are not usable - thus | |
381 | * we are rounding upwards: | |
382 | */ | |
383 | end_pfn = e820_end_of_ram(); | |
99fc8d42 JB |
384 | /* update e820 for memory not covered by WB MTRRs */ |
385 | mtrr_bp_init(); | |
386 | if (mtrr_trim_uncached_memory(end_pfn)) { | |
387 | e820_register_active_regions(0, 0, -1UL); | |
388 | end_pfn = e820_end_of_ram(); | |
389 | } | |
390 | ||
caff0710 | 391 | num_physpages = end_pfn; |
1da177e4 LT |
392 | |
393 | check_efer(); | |
394 | ||
cc615032 | 395 | max_pfn_mapped = init_memory_mapping(0, (max_pfn_mapped << PAGE_SHIFT)); |
5b83683f HY |
396 | if (efi_enabled) |
397 | efi_init(); | |
1da177e4 | 398 | |
2785c8d0 | 399 | vsmp_init(); |
2785c8d0 | 400 | |
f2d3efed AK |
401 | dmi_scan_machine(); |
402 | ||
b02aae9c RH |
403 | io_delay_init(); |
404 | ||
790c73f6 GOC |
405 | #ifdef CONFIG_KVM_CLOCK |
406 | kvmclock_init(); | |
407 | #endif | |
408 | ||
888ba6c6 | 409 | #ifdef CONFIG_ACPI |
1da177e4 LT |
410 | /* |
411 | * Initialize the ACPI boot-time table parser (gets the RSDP and SDT). | |
412 | * Call this early for SRAT node setup. | |
413 | */ | |
414 | acpi_boot_table_init(); | |
415 | #endif | |
416 | ||
caff0710 JB |
417 | /* How many end-of-memory variables you have, grandma! */ |
418 | max_low_pfn = end_pfn; | |
419 | max_pfn = end_pfn; | |
420 | high_memory = (void *)__va(end_pfn * PAGE_SIZE - 1) + 1; | |
421 | ||
5cb248ab MG |
422 | /* Remove active ranges so rediscovery with NUMA-awareness happens */ |
423 | remove_all_active_ranges(); | |
424 | ||
1da177e4 LT |
425 | #ifdef CONFIG_ACPI_NUMA |
426 | /* | |
427 | * Parse SRAT to discover nodes. | |
428 | */ | |
429 | acpi_numa_init(); | |
430 | #endif | |
431 | ||
2b97690f | 432 | #ifdef CONFIG_NUMA |
04e1ba85 | 433 | numa_initmem_init(0, end_pfn); |
1da177e4 | 434 | #else |
bbfceef4 | 435 | contig_initmem_init(0, end_pfn); |
1da177e4 LT |
436 | #endif |
437 | ||
752bea4a YL |
438 | dma32_reserve_bootmem(); |
439 | ||
673d5b43 | 440 | #ifdef CONFIG_ACPI_SLEEP |
1da177e4 | 441 | /* |
04e1ba85 | 442 | * Reserve low memory region for sleep support. |
1da177e4 | 443 | */ |
04e1ba85 TG |
444 | acpi_reserve_bootmem(); |
445 | #endif | |
5b83683f | 446 | |
a3828064 | 447 | if (efi_enabled) |
5b83683f | 448 | efi_reserve_bootmem(); |
5b83683f | 449 | |
04e1ba85 TG |
450 | /* |
451 | * Find and reserve possible boot-time SMP configuration: | |
452 | */ | |
1da177e4 | 453 | find_smp_config(); |
1da177e4 | 454 | #ifdef CONFIG_BLK_DEV_INITRD |
30c82645 PA |
455 | if (boot_params.hdr.type_of_loader && boot_params.hdr.ramdisk_image) { |
456 | unsigned long ramdisk_image = boot_params.hdr.ramdisk_image; | |
457 | unsigned long ramdisk_size = boot_params.hdr.ramdisk_size; | |
458 | unsigned long ramdisk_end = ramdisk_image + ramdisk_size; | |
459 | unsigned long end_of_mem = end_pfn << PAGE_SHIFT; | |
460 | ||
461 | if (ramdisk_end <= end_of_mem) { | |
2b8106a0 YL |
462 | /* |
463 | * don't need to reserve again, already reserved early | |
464 | * in x86_64_start_kernel, and early_res_to_bootmem | |
465 | * convert that to reserved in bootmem | |
466 | */ | |
30c82645 PA |
467 | initrd_start = ramdisk_image + PAGE_OFFSET; |
468 | initrd_end = initrd_start+ramdisk_size; | |
469 | } else { | |
75175278 | 470 | free_bootmem(ramdisk_image, ramdisk_size); |
1da177e4 | 471 | printk(KERN_ERR "initrd extends beyond end of memory " |
30c82645 PA |
472 | "(0x%08lx > 0x%08lx)\ndisabling initrd\n", |
473 | ramdisk_end, end_of_mem); | |
1da177e4 LT |
474 | initrd_start = 0; |
475 | } | |
476 | } | |
477 | #endif | |
5c3391f9 | 478 | reserve_crashkernel(); |
138fe4e0 KR |
479 | |
480 | reserve_ibft_region(); | |
481 | ||
1da177e4 | 482 | paging_init(); |
e4026440 | 483 | map_vsyscall(); |
1da177e4 | 484 | |
dfa4698c | 485 | early_quirks(); |
1da177e4 | 486 | |
888ba6c6 | 487 | #ifdef CONFIG_ACPI |
1da177e4 LT |
488 | /* |
489 | * Read APIC and some other early information from ACPI tables. | |
490 | */ | |
491 | acpi_boot_init(); | |
492 | #endif | |
493 | ||
05b3cbd8 RT |
494 | init_cpu_to_node(); |
495 | ||
1da177e4 LT |
496 | /* |
497 | * get boot-time SMP configuration: | |
498 | */ | |
499 | if (smp_found_config) | |
500 | get_smp_config(); | |
501 | init_apic_mappings(); | |
3e35a0e5 | 502 | ioapic_init_mappings(); |
1da177e4 | 503 | |
0cf1bfd2 MT |
504 | kvm_guest_init(); |
505 | ||
1da177e4 | 506 | /* |
fc986db4 | 507 | * We trust e820 completely. No explicit ROM probing in memory. |
04e1ba85 | 508 | */ |
3def3d6d | 509 | e820_reserve_resources(); |
e8eff5ac | 510 | e820_mark_nosave_regions(); |
1da177e4 | 511 | |
1da177e4 | 512 | /* request I/O space for devices used on all i[345]86 PCs */ |
9d0ef4fd | 513 | for (i = 0; i < ARRAY_SIZE(standard_io_resources); i++) |
1da177e4 | 514 | request_resource(&ioport_resource, &standard_io_resources[i]); |
1da177e4 | 515 | |
a1e97782 | 516 | e820_setup_gap(); |
1da177e4 | 517 | |
1da177e4 LT |
518 | #ifdef CONFIG_VT |
519 | #if defined(CONFIG_VGA_CONSOLE) | |
5b83683f HY |
520 | if (!efi_enabled || (efi_mem_type(0xa0000) != EFI_CONVENTIONAL_MEMORY)) |
521 | conswitchp = &vga_con; | |
1da177e4 LT |
522 | #elif defined(CONFIG_DUMMY_CONSOLE) |
523 | conswitchp = &dummy_con; | |
524 | #endif | |
525 | #endif | |
5f0b2976 YL |
526 | |
527 | /* do this before identify_cpu for boot cpu */ | |
528 | check_enable_amd_mmconf_dmi(); | |
1da177e4 LT |
529 | } |
530 | ||
e6982c67 | 531 | static int __cpuinit get_model_name(struct cpuinfo_x86 *c) |
1da177e4 LT |
532 | { |
533 | unsigned int *v; | |
534 | ||
ebfcaa96 | 535 | if (c->extended_cpuid_level < 0x80000004) |
1da177e4 LT |
536 | return 0; |
537 | ||
538 | v = (unsigned int *) c->x86_model_id; | |
539 | cpuid(0x80000002, &v[0], &v[1], &v[2], &v[3]); | |
540 | cpuid(0x80000003, &v[4], &v[5], &v[6], &v[7]); | |
541 | cpuid(0x80000004, &v[8], &v[9], &v[10], &v[11]); | |
542 | c->x86_model_id[48] = 0; | |
543 | return 1; | |
544 | } | |
545 | ||
546 | ||
e6982c67 | 547 | static void __cpuinit display_cacheinfo(struct cpuinfo_x86 *c) |
1da177e4 LT |
548 | { |
549 | unsigned int n, dummy, eax, ebx, ecx, edx; | |
550 | ||
ebfcaa96 | 551 | n = c->extended_cpuid_level; |
1da177e4 LT |
552 | |
553 | if (n >= 0x80000005) { | |
554 | cpuid(0x80000005, &dummy, &ebx, &ecx, &edx); | |
04e1ba85 TG |
555 | printk(KERN_INFO "CPU: L1 I Cache: %dK (%d bytes/line), " |
556 | "D cache %dK (%d bytes/line)\n", | |
557 | edx>>24, edx&0xFF, ecx>>24, ecx&0xFF); | |
558 | c->x86_cache_size = (ecx>>24) + (edx>>24); | |
1da177e4 LT |
559 | /* On K8 L1 TLB is inclusive, so don't count it */ |
560 | c->x86_tlbsize = 0; | |
561 | } | |
562 | ||
563 | if (n >= 0x80000006) { | |
564 | cpuid(0x80000006, &dummy, &ebx, &ecx, &edx); | |
565 | ecx = cpuid_ecx(0x80000006); | |
566 | c->x86_cache_size = ecx >> 16; | |
567 | c->x86_tlbsize += ((ebx >> 16) & 0xfff) + (ebx & 0xfff); | |
568 | ||
569 | printk(KERN_INFO "CPU: L2 Cache: %dK (%d bytes/line)\n", | |
570 | c->x86_cache_size, ecx & 0xFF); | |
571 | } | |
1da177e4 | 572 | if (n >= 0x80000008) { |
04e1ba85 | 573 | cpuid(0x80000008, &eax, &dummy, &dummy, &dummy); |
1da177e4 LT |
574 | c->x86_virt_bits = (eax >> 8) & 0xff; |
575 | c->x86_phys_bits = eax & 0xff; | |
576 | } | |
577 | } | |
578 | ||
3f098c26 | 579 | #ifdef CONFIG_NUMA |
08acb672 | 580 | static int __cpuinit nearby_node(int apicid) |
3f098c26 | 581 | { |
04e1ba85 TG |
582 | int i, node; |
583 | ||
3f098c26 | 584 | for (i = apicid - 1; i >= 0; i--) { |
04e1ba85 | 585 | node = apicid_to_node[i]; |
3f098c26 AK |
586 | if (node != NUMA_NO_NODE && node_online(node)) |
587 | return node; | |
588 | } | |
589 | for (i = apicid + 1; i < MAX_LOCAL_APIC; i++) { | |
04e1ba85 | 590 | node = apicid_to_node[i]; |
3f098c26 AK |
591 | if (node != NUMA_NO_NODE && node_online(node)) |
592 | return node; | |
593 | } | |
594 | return first_node(node_online_map); /* Shouldn't happen */ | |
595 | } | |
596 | #endif | |
597 | ||
63518644 AK |
598 | /* |
599 | * On a AMD dual core setup the lower bits of the APIC id distingush the cores. | |
600 | * Assumes number of cores is a power of two. | |
601 | */ | |
adb8daed | 602 | static void __cpuinit amd_detect_cmp(struct cpuinfo_x86 *c) |
63518644 AK |
603 | { |
604 | #ifdef CONFIG_SMP | |
b41e2939 | 605 | unsigned bits; |
3f098c26 | 606 | #ifdef CONFIG_NUMA |
f3fa8ebc | 607 | int cpu = smp_processor_id(); |
3f098c26 | 608 | int node = 0; |
60c1bc82 | 609 | unsigned apicid = hard_smp_processor_id(); |
3f098c26 | 610 | #endif |
a860b63c | 611 | bits = c->x86_coreid_bits; |
b41e2939 AK |
612 | |
613 | /* Low order bits define the core id (index of core in socket) */ | |
01aaea1a YL |
614 | c->cpu_core_id = c->initial_apicid & ((1 << bits)-1); |
615 | /* Convert the initial APIC ID into the socket ID */ | |
616 | c->phys_proc_id = c->initial_apicid >> bits; | |
63518644 AK |
617 | |
618 | #ifdef CONFIG_NUMA | |
04e1ba85 TG |
619 | node = c->phys_proc_id; |
620 | if (apicid_to_node[apicid] != NUMA_NO_NODE) | |
621 | node = apicid_to_node[apicid]; | |
622 | if (!node_online(node)) { | |
623 | /* Two possibilities here: | |
624 | - The CPU is missing memory and no node was created. | |
625 | In that case try picking one from a nearby CPU | |
626 | - The APIC IDs differ from the HyperTransport node IDs | |
627 | which the K8 northbridge parsing fills in. | |
628 | Assume they are all increased by a constant offset, | |
629 | but in the same order as the HT nodeids. | |
630 | If that doesn't result in a usable node fall back to the | |
631 | path for the previous case. */ | |
632 | ||
01aaea1a | 633 | int ht_nodeid = c->initial_apicid; |
04e1ba85 TG |
634 | |
635 | if (ht_nodeid >= 0 && | |
636 | apicid_to_node[ht_nodeid] != NUMA_NO_NODE) | |
637 | node = apicid_to_node[ht_nodeid]; | |
638 | /* Pick a nearby node */ | |
639 | if (!node_online(node)) | |
640 | node = nearby_node(apicid); | |
641 | } | |
69d81fcd | 642 | numa_set_node(cpu, node); |
3f098c26 | 643 | |
e42f9437 | 644 | printk(KERN_INFO "CPU %d/%x -> Node %d\n", cpu, apicid, node); |
63518644 | 645 | #endif |
63518644 AK |
646 | #endif |
647 | } | |
1da177e4 | 648 | |
2b16a235 | 649 | static void __cpuinit early_init_amd_mc(struct cpuinfo_x86 *c) |
a860b63c YL |
650 | { |
651 | #ifdef CONFIG_SMP | |
652 | unsigned bits, ecx; | |
653 | ||
654 | /* Multi core CPU? */ | |
655 | if (c->extended_cpuid_level < 0x80000008) | |
656 | return; | |
657 | ||
658 | ecx = cpuid_ecx(0x80000008); | |
659 | ||
660 | c->x86_max_cores = (ecx & 0xff) + 1; | |
661 | ||
662 | /* CPU telling us the core id bits shift? */ | |
663 | bits = (ecx >> 12) & 0xF; | |
664 | ||
665 | /* Otherwise recompute */ | |
666 | if (bits == 0) { | |
667 | while ((1 << bits) < c->x86_max_cores) | |
668 | bits++; | |
669 | } | |
670 | ||
671 | c->x86_coreid_bits = bits; | |
672 | ||
673 | #endif | |
674 | } | |
675 | ||
fb79d22e TG |
676 | #define ENABLE_C1E_MASK 0x18000000 |
677 | #define CPUID_PROCESSOR_SIGNATURE 1 | |
678 | #define CPUID_XFAM 0x0ff00000 | |
679 | #define CPUID_XFAM_K8 0x00000000 | |
680 | #define CPUID_XFAM_10H 0x00100000 | |
681 | #define CPUID_XFAM_11H 0x00200000 | |
682 | #define CPUID_XMOD 0x000f0000 | |
683 | #define CPUID_XMOD_REV_F 0x00040000 | |
684 | ||
685 | /* AMD systems with C1E don't have a working lAPIC timer. Check for that. */ | |
686 | static __cpuinit int amd_apic_timer_broken(void) | |
687 | { | |
04e1ba85 TG |
688 | u32 lo, hi, eax = cpuid_eax(CPUID_PROCESSOR_SIGNATURE); |
689 | ||
fb79d22e TG |
690 | switch (eax & CPUID_XFAM) { |
691 | case CPUID_XFAM_K8: | |
692 | if ((eax & CPUID_XMOD) < CPUID_XMOD_REV_F) | |
693 | break; | |
694 | case CPUID_XFAM_10H: | |
695 | case CPUID_XFAM_11H: | |
696 | rdmsr(MSR_K8_ENABLE_C1E, lo, hi); | |
697 | if (lo & ENABLE_C1E_MASK) | |
698 | return 1; | |
699 | break; | |
700 | default: | |
701 | /* err on the side of caution */ | |
702 | return 1; | |
703 | } | |
704 | return 0; | |
705 | } | |
706 | ||
2b16a235 AK |
707 | static void __cpuinit early_init_amd(struct cpuinfo_x86 *c) |
708 | { | |
709 | early_init_amd_mc(c); | |
710 | ||
711 | /* c->x86_power is 8000_0007 edx. Bit 8 is constant TSC */ | |
712 | if (c->x86_power & (1<<8)) | |
713 | set_cpu_cap(c, X86_FEATURE_CONSTANT_TSC); | |
714 | } | |
715 | ||
ed77504b | 716 | static void __cpuinit init_amd(struct cpuinfo_x86 *c) |
1da177e4 | 717 | { |
7bcd3f34 | 718 | unsigned level; |
1da177e4 | 719 | |
bc5e8fdf LT |
720 | #ifdef CONFIG_SMP |
721 | unsigned long value; | |
722 | ||
7d318d77 AK |
723 | /* |
724 | * Disable TLB flush filter by setting HWCR.FFDIS on K8 | |
725 | * bit 6 of msr C001_0015 | |
04e1ba85 | 726 | * |
7d318d77 AK |
727 | * Errata 63 for SH-B3 steppings |
728 | * Errata 122 for all steppings (F+ have it disabled by default) | |
729 | */ | |
730 | if (c->x86 == 15) { | |
731 | rdmsrl(MSR_K8_HWCR, value); | |
732 | value |= 1 << 6; | |
733 | wrmsrl(MSR_K8_HWCR, value); | |
734 | } | |
bc5e8fdf LT |
735 | #endif |
736 | ||
1da177e4 LT |
737 | /* Bit 31 in normal CPUID used for nonstandard 3DNow ID; |
738 | 3DNow is IDd by bit 31 in extended CPUID (1*32+31) anyway */ | |
9716951e | 739 | clear_cpu_cap(c, 0*32+31); |
04e1ba85 | 740 | |
7bcd3f34 AK |
741 | /* On C+ stepping K8 rep microcode works well for copy/memset */ |
742 | level = cpuid_eax(1); | |
04e1ba85 TG |
743 | if (c->x86 == 15 && ((level >= 0x0f48 && level < 0x0f50) || |
744 | level >= 0x0f58)) | |
53756d37 | 745 | set_cpu_cap(c, X86_FEATURE_REP_GOOD); |
99741faa | 746 | if (c->x86 == 0x10 || c->x86 == 0x11) |
53756d37 | 747 | set_cpu_cap(c, X86_FEATURE_REP_GOOD); |
7bcd3f34 | 748 | |
18bd057b AK |
749 | /* Enable workaround for FXSAVE leak */ |
750 | if (c->x86 >= 6) | |
53756d37 | 751 | set_cpu_cap(c, X86_FEATURE_FXSAVE_LEAK); |
18bd057b | 752 | |
e42f9437 RS |
753 | level = get_model_name(c); |
754 | if (!level) { | |
04e1ba85 | 755 | switch (c->x86) { |
1da177e4 LT |
756 | case 15: |
757 | /* Should distinguish Models here, but this is only | |
758 | a fallback anyways. */ | |
759 | strcpy(c->x86_model_id, "Hammer"); | |
04e1ba85 TG |
760 | break; |
761 | } | |
762 | } | |
1da177e4 LT |
763 | display_cacheinfo(c); |
764 | ||
faee9a5d AK |
765 | /* Multi core CPU? */ |
766 | if (c->extended_cpuid_level >= 0x80000008) | |
63518644 | 767 | amd_detect_cmp(c); |
1da177e4 | 768 | |
67cddd94 AK |
769 | if (c->extended_cpuid_level >= 0x80000006 && |
770 | (cpuid_edx(0x80000006) & 0xf000)) | |
771 | num_cache_leaves = 4; | |
772 | else | |
773 | num_cache_leaves = 3; | |
2049336f | 774 | |
0bd8acd1 | 775 | if (c->x86 == 0xf || c->x86 == 0x10 || c->x86 == 0x11) |
53756d37 | 776 | set_cpu_cap(c, X86_FEATURE_K8); |
0bd8acd1 | 777 | |
de421863 AK |
778 | /* MFENCE stops RDTSC speculation */ |
779 | set_cpu_cap(c, X86_FEATURE_MFENCE_RDTSC); | |
f039b754 | 780 | |
eee206c3 | 781 | if (c->x86 == 0x10) |
d39398a3 | 782 | fam10h_check_enable_mmcfg(); |
eee206c3 | 783 | |
fb79d22e TG |
784 | if (amd_apic_timer_broken()) |
785 | disable_apic_timer = 1; | |
8346ea17 AK |
786 | |
787 | if (c == &boot_cpu_data && c->x86 >= 0xf && c->x86 <= 0x11) { | |
788 | unsigned long long tseg; | |
789 | ||
790 | /* | |
791 | * Split up direct mapping around the TSEG SMM area. | |
792 | * Don't do it for gbpages because there seems very little | |
793 | * benefit in doing so. | |
794 | */ | |
795 | if (!rdmsrl_safe(MSR_K8_TSEG_ADDR, &tseg) && | |
796 | (tseg >> PMD_SHIFT) < (max_pfn_mapped >> (PMD_SHIFT-PAGE_SHIFT))) | |
797 | set_memory_4k((unsigned long)__va(tseg), 1); | |
798 | } | |
1da177e4 LT |
799 | } |
800 | ||
1a53905a | 801 | void __cpuinit detect_ht(struct cpuinfo_x86 *c) |
1da177e4 LT |
802 | { |
803 | #ifdef CONFIG_SMP | |
04e1ba85 TG |
804 | u32 eax, ebx, ecx, edx; |
805 | int index_msb, core_bits; | |
94605eff SS |
806 | |
807 | cpuid(1, &eax, &ebx, &ecx, &edx); | |
808 | ||
94605eff | 809 | |
e42f9437 | 810 | if (!cpu_has(c, X86_FEATURE_HT)) |
1da177e4 | 811 | return; |
04e1ba85 | 812 | if (cpu_has(c, X86_FEATURE_CMP_LEGACY)) |
e42f9437 | 813 | goto out; |
1da177e4 | 814 | |
1da177e4 | 815 | smp_num_siblings = (ebx & 0xff0000) >> 16; |
94605eff | 816 | |
1da177e4 LT |
817 | if (smp_num_siblings == 1) { |
818 | printk(KERN_INFO "CPU: Hyper-Threading is disabled\n"); | |
04e1ba85 | 819 | } else if (smp_num_siblings > 1) { |
94605eff | 820 | |
1da177e4 | 821 | if (smp_num_siblings > NR_CPUS) { |
04e1ba85 TG |
822 | printk(KERN_WARNING "CPU: Unsupported number of " |
823 | "siblings %d", smp_num_siblings); | |
1da177e4 LT |
824 | smp_num_siblings = 1; |
825 | return; | |
826 | } | |
94605eff SS |
827 | |
828 | index_msb = get_count_order(smp_num_siblings); | |
f3fa8ebc | 829 | c->phys_proc_id = phys_pkg_id(index_msb); |
3dd9d514 | 830 | |
94605eff | 831 | smp_num_siblings = smp_num_siblings / c->x86_max_cores; |
3dd9d514 | 832 | |
04e1ba85 | 833 | index_msb = get_count_order(smp_num_siblings); |
94605eff SS |
834 | |
835 | core_bits = get_count_order(c->x86_max_cores); | |
3dd9d514 | 836 | |
f3fa8ebc | 837 | c->cpu_core_id = phys_pkg_id(index_msb) & |
94605eff | 838 | ((1 << core_bits) - 1); |
1da177e4 | 839 | } |
e42f9437 RS |
840 | out: |
841 | if ((c->x86_max_cores * smp_num_siblings) > 1) { | |
04e1ba85 TG |
842 | printk(KERN_INFO "CPU: Physical Processor ID: %d\n", |
843 | c->phys_proc_id); | |
844 | printk(KERN_INFO "CPU: Processor Core ID: %d\n", | |
845 | c->cpu_core_id); | |
e42f9437 RS |
846 | } |
847 | ||
1da177e4 LT |
848 | #endif |
849 | } | |
850 | ||
3dd9d514 AK |
851 | /* |
852 | * find out the number of processor cores on the die | |
853 | */ | |
e6982c67 | 854 | static int __cpuinit intel_num_cpu_cores(struct cpuinfo_x86 *c) |
3dd9d514 | 855 | { |
2bbc419f | 856 | unsigned int eax, t; |
3dd9d514 AK |
857 | |
858 | if (c->cpuid_level < 4) | |
859 | return 1; | |
860 | ||
2bbc419f | 861 | cpuid_count(4, 0, &eax, &t, &t, &t); |
3dd9d514 AK |
862 | |
863 | if (eax & 0x1f) | |
864 | return ((eax >> 26) + 1); | |
865 | else | |
866 | return 1; | |
867 | } | |
868 | ||
04d733bd | 869 | static void __cpuinit srat_detect_node(void) |
df0cc26b AK |
870 | { |
871 | #ifdef CONFIG_NUMA | |
ddea7be0 | 872 | unsigned node; |
df0cc26b | 873 | int cpu = smp_processor_id(); |
e42f9437 | 874 | int apicid = hard_smp_processor_id(); |
df0cc26b AK |
875 | |
876 | /* Don't do the funky fallback heuristics the AMD version employs | |
877 | for now. */ | |
e42f9437 | 878 | node = apicid_to_node[apicid]; |
475613b9 | 879 | if (node == NUMA_NO_NODE || !node_online(node)) |
0d015324 | 880 | node = first_node(node_online_map); |
69d81fcd | 881 | numa_set_node(cpu, node); |
df0cc26b | 882 | |
c31fbb1a | 883 | printk(KERN_INFO "CPU %d/%x -> Node %d\n", cpu, apicid, node); |
df0cc26b AK |
884 | #endif |
885 | } | |
886 | ||
2b16a235 AK |
887 | static void __cpuinit early_init_intel(struct cpuinfo_x86 *c) |
888 | { | |
889 | if ((c->x86 == 0xf && c->x86_model >= 0x03) || | |
890 | (c->x86 == 0x6 && c->x86_model >= 0x0e)) | |
9716951e | 891 | set_cpu_cap(c, X86_FEATURE_CONSTANT_TSC); |
2b16a235 AK |
892 | } |
893 | ||
e6982c67 | 894 | static void __cpuinit init_intel(struct cpuinfo_x86 *c) |
1da177e4 LT |
895 | { |
896 | /* Cache sizes */ | |
897 | unsigned n; | |
898 | ||
899 | init_intel_cacheinfo(c); | |
04e1ba85 | 900 | if (c->cpuid_level > 9) { |
0080e667 VP |
901 | unsigned eax = cpuid_eax(10); |
902 | /* Check for version and the number of counters */ | |
903 | if ((eax & 0xff) && (((eax>>8) & 0xff) > 1)) | |
53756d37 | 904 | set_cpu_cap(c, X86_FEATURE_ARCH_PERFMON); |
0080e667 VP |
905 | } |
906 | ||
36b2a8d5 SE |
907 | if (cpu_has_ds) { |
908 | unsigned int l1, l2; | |
909 | rdmsr(MSR_IA32_MISC_ENABLE, l1, l2); | |
ee58fad5 | 910 | if (!(l1 & (1<<11))) |
53756d37 | 911 | set_cpu_cap(c, X86_FEATURE_BTS); |
36b2a8d5 | 912 | if (!(l1 & (1<<12))) |
53756d37 | 913 | set_cpu_cap(c, X86_FEATURE_PEBS); |
36b2a8d5 SE |
914 | } |
915 | ||
eee3af4a MM |
916 | |
917 | if (cpu_has_bts) | |
918 | ds_init_intel(c); | |
919 | ||
ebfcaa96 | 920 | n = c->extended_cpuid_level; |
1da177e4 LT |
921 | if (n >= 0x80000008) { |
922 | unsigned eax = cpuid_eax(0x80000008); | |
923 | c->x86_virt_bits = (eax >> 8) & 0xff; | |
924 | c->x86_phys_bits = eax & 0xff; | |
af9c142d SL |
925 | /* CPUID workaround for Intel 0F34 CPU */ |
926 | if (c->x86_vendor == X86_VENDOR_INTEL && | |
927 | c->x86 == 0xF && c->x86_model == 0x3 && | |
928 | c->x86_mask == 0x4) | |
929 | c->x86_phys_bits = 36; | |
1da177e4 LT |
930 | } |
931 | ||
932 | if (c->x86 == 15) | |
933 | c->x86_cache_alignment = c->x86_clflush_size * 2; | |
27fbe5b2 | 934 | if (c->x86 == 6) |
53756d37 | 935 | set_cpu_cap(c, X86_FEATURE_REP_GOOD); |
707fa8ed | 936 | set_cpu_cap(c, X86_FEATURE_LFENCE_RDTSC); |
04e1ba85 | 937 | c->x86_max_cores = intel_num_cpu_cores(c); |
df0cc26b AK |
938 | |
939 | srat_detect_node(); | |
1da177e4 LT |
940 | } |
941 | ||
0e03eb86 DJ |
942 | static void __cpuinit early_init_centaur(struct cpuinfo_x86 *c) |
943 | { | |
944 | if (c->x86 == 0x6 && c->x86_model >= 0xf) | |
8c45a4e4 | 945 | set_cpu_cap(c, X86_FEATURE_CONSTANT_TSC); |
0e03eb86 DJ |
946 | } |
947 | ||
948 | static void __cpuinit init_centaur(struct cpuinfo_x86 *c) | |
949 | { | |
950 | /* Cache sizes */ | |
951 | unsigned n; | |
952 | ||
953 | n = c->extended_cpuid_level; | |
954 | if (n >= 0x80000008) { | |
955 | unsigned eax = cpuid_eax(0x80000008); | |
956 | c->x86_virt_bits = (eax >> 8) & 0xff; | |
957 | c->x86_phys_bits = eax & 0xff; | |
958 | } | |
959 | ||
960 | if (c->x86 == 0x6 && c->x86_model >= 0xf) { | |
961 | c->x86_cache_alignment = c->x86_clflush_size * 2; | |
962 | set_cpu_cap(c, X86_FEATURE_CONSTANT_TSC); | |
963 | set_cpu_cap(c, X86_FEATURE_REP_GOOD); | |
964 | } | |
965 | set_cpu_cap(c, X86_FEATURE_LFENCE_RDTSC); | |
966 | } | |
967 | ||
672289e9 | 968 | static void __cpuinit get_cpu_vendor(struct cpuinfo_x86 *c) |
1da177e4 LT |
969 | { |
970 | char *v = c->x86_vendor_id; | |
971 | ||
972 | if (!strcmp(v, "AuthenticAMD")) | |
973 | c->x86_vendor = X86_VENDOR_AMD; | |
974 | else if (!strcmp(v, "GenuineIntel")) | |
975 | c->x86_vendor = X86_VENDOR_INTEL; | |
0e03eb86 DJ |
976 | else if (!strcmp(v, "CentaurHauls")) |
977 | c->x86_vendor = X86_VENDOR_CENTAUR; | |
1da177e4 LT |
978 | else |
979 | c->x86_vendor = X86_VENDOR_UNKNOWN; | |
980 | } | |
981 | ||
1da177e4 LT |
982 | /* Do some early cpuid on the boot CPU to get some parameter that are |
983 | needed before check_bugs. Everything advanced is in identify_cpu | |
984 | below. */ | |
8c61b900 | 985 | static void __cpuinit early_identify_cpu(struct cpuinfo_x86 *c) |
1da177e4 | 986 | { |
a860b63c | 987 | u32 tfms, xlvl; |
1da177e4 LT |
988 | |
989 | c->loops_per_jiffy = loops_per_jiffy; | |
990 | c->x86_cache_size = -1; | |
991 | c->x86_vendor = X86_VENDOR_UNKNOWN; | |
992 | c->x86_model = c->x86_mask = 0; /* So far unknown... */ | |
993 | c->x86_vendor_id[0] = '\0'; /* Unset */ | |
994 | c->x86_model_id[0] = '\0'; /* Unset */ | |
995 | c->x86_clflush_size = 64; | |
996 | c->x86_cache_alignment = c->x86_clflush_size; | |
94605eff | 997 | c->x86_max_cores = 1; |
a860b63c | 998 | c->x86_coreid_bits = 0; |
ebfcaa96 | 999 | c->extended_cpuid_level = 0; |
1da177e4 LT |
1000 | memset(&c->x86_capability, 0, sizeof c->x86_capability); |
1001 | ||
1002 | /* Get vendor name */ | |
1003 | cpuid(0x00000000, (unsigned int *)&c->cpuid_level, | |
1004 | (unsigned int *)&c->x86_vendor_id[0], | |
1005 | (unsigned int *)&c->x86_vendor_id[8], | |
1006 | (unsigned int *)&c->x86_vendor_id[4]); | |
04e1ba85 | 1007 | |
1da177e4 LT |
1008 | get_cpu_vendor(c); |
1009 | ||
1010 | /* Initialize the standard set of capabilities */ | |
1011 | /* Note that the vendor-specific code below might override */ | |
1012 | ||
1013 | /* Intel-defined flags: level 0x00000001 */ | |
1014 | if (c->cpuid_level >= 0x00000001) { | |
1015 | __u32 misc; | |
1016 | cpuid(0x00000001, &tfms, &misc, &c->x86_capability[4], | |
1017 | &c->x86_capability[0]); | |
1018 | c->x86 = (tfms >> 8) & 0xf; | |
1019 | c->x86_model = (tfms >> 4) & 0xf; | |
1020 | c->x86_mask = tfms & 0xf; | |
f5f786d0 | 1021 | if (c->x86 == 0xf) |
1da177e4 | 1022 | c->x86 += (tfms >> 20) & 0xff; |
f5f786d0 | 1023 | if (c->x86 >= 0x6) |
1da177e4 | 1024 | c->x86_model += ((tfms >> 16) & 0xF) << 4; |
9716951e | 1025 | if (test_cpu_cap(c, X86_FEATURE_CLFLSH)) |
1da177e4 | 1026 | c->x86_clflush_size = ((misc >> 8) & 0xff) * 8; |
1da177e4 LT |
1027 | } else { |
1028 | /* Have CPUID level 0 only - unheard of */ | |
1029 | c->x86 = 4; | |
1030 | } | |
a158608b | 1031 | |
01aaea1a | 1032 | c->initial_apicid = (cpuid_ebx(1) >> 24) & 0xff; |
a158608b | 1033 | #ifdef CONFIG_SMP |
01aaea1a | 1034 | c->phys_proc_id = c->initial_apicid; |
a158608b | 1035 | #endif |
1da177e4 LT |
1036 | /* AMD-defined flags: level 0x80000001 */ |
1037 | xlvl = cpuid_eax(0x80000000); | |
ebfcaa96 | 1038 | c->extended_cpuid_level = xlvl; |
1da177e4 LT |
1039 | if ((xlvl & 0xffff0000) == 0x80000000) { |
1040 | if (xlvl >= 0x80000001) { | |
1041 | c->x86_capability[1] = cpuid_edx(0x80000001); | |
5b7abc6f | 1042 | c->x86_capability[6] = cpuid_ecx(0x80000001); |
1da177e4 LT |
1043 | } |
1044 | if (xlvl >= 0x80000004) | |
1045 | get_model_name(c); /* Default name */ | |
1046 | } | |
1047 | ||
1048 | /* Transmeta-defined flags: level 0x80860001 */ | |
1049 | xlvl = cpuid_eax(0x80860000); | |
1050 | if ((xlvl & 0xffff0000) == 0x80860000) { | |
1051 | /* Don't set x86_cpuid_level here for now to not confuse. */ | |
1052 | if (xlvl >= 0x80860001) | |
1053 | c->x86_capability[2] = cpuid_edx(0x80860001); | |
1054 | } | |
1055 | ||
9566e91d AH |
1056 | c->extended_cpuid_level = cpuid_eax(0x80000000); |
1057 | if (c->extended_cpuid_level >= 0x80000007) | |
1058 | c->x86_power = cpuid_edx(0x80000007); | |
1059 | ||
a860b63c YL |
1060 | switch (c->x86_vendor) { |
1061 | case X86_VENDOR_AMD: | |
1062 | early_init_amd(c); | |
1063 | break; | |
71617bf1 YL |
1064 | case X86_VENDOR_INTEL: |
1065 | early_init_intel(c); | |
1066 | break; | |
0e03eb86 DJ |
1067 | case X86_VENDOR_CENTAUR: |
1068 | early_init_centaur(c); | |
1069 | break; | |
a860b63c YL |
1070 | } |
1071 | ||
8d4a4300 | 1072 | validate_pat_support(c); |
a860b63c YL |
1073 | } |
1074 | ||
1075 | /* | |
1076 | * This does the hard work of actually picking apart the CPU stuff... | |
1077 | */ | |
1078 | void __cpuinit identify_cpu(struct cpuinfo_x86 *c) | |
1079 | { | |
1080 | int i; | |
1081 | ||
1082 | early_identify_cpu(c); | |
1083 | ||
1d67953f VP |
1084 | init_scattered_cpuid_features(c); |
1085 | ||
1e9f28fa SS |
1086 | c->apicid = phys_pkg_id(0); |
1087 | ||
1da177e4 LT |
1088 | /* |
1089 | * Vendor-specific initialization. In this section we | |
1090 | * canonicalize the feature flags, meaning if there are | |
1091 | * features a certain CPU supports which CPUID doesn't | |
1092 | * tell us, CPUID claiming incorrect flags, or other bugs, | |
1093 | * we handle them here. | |
1094 | * | |
1095 | * At the end of this section, c->x86_capability better | |
1096 | * indicate the features this CPU genuinely supports! | |
1097 | */ | |
1098 | switch (c->x86_vendor) { | |
1099 | case X86_VENDOR_AMD: | |
1100 | init_amd(c); | |
1101 | break; | |
1102 | ||
1103 | case X86_VENDOR_INTEL: | |
1104 | init_intel(c); | |
1105 | break; | |
1106 | ||
0e03eb86 DJ |
1107 | case X86_VENDOR_CENTAUR: |
1108 | init_centaur(c); | |
1109 | break; | |
1110 | ||
1da177e4 LT |
1111 | case X86_VENDOR_UNKNOWN: |
1112 | default: | |
1113 | display_cacheinfo(c); | |
1114 | break; | |
1115 | } | |
1116 | ||
04e1ba85 | 1117 | detect_ht(c); |
1da177e4 LT |
1118 | |
1119 | /* | |
1120 | * On SMP, boot_cpu_data holds the common feature set between | |
1121 | * all CPUs; so make sure that we indicate which features are | |
1122 | * common between the CPUs. The first time this routine gets | |
1123 | * executed, c == &boot_cpu_data. | |
1124 | */ | |
1125 | if (c != &boot_cpu_data) { | |
1126 | /* AND the already accumulated flags with these */ | |
04e1ba85 | 1127 | for (i = 0; i < NCAPINTS; i++) |
1da177e4 LT |
1128 | boot_cpu_data.x86_capability[i] &= c->x86_capability[i]; |
1129 | } | |
1130 | ||
7d851c8d AK |
1131 | /* Clear all flags overriden by options */ |
1132 | for (i = 0; i < NCAPINTS; i++) | |
12c247a6 | 1133 | c->x86_capability[i] &= ~cleared_cpu_caps[i]; |
7d851c8d | 1134 | |
1da177e4 LT |
1135 | #ifdef CONFIG_X86_MCE |
1136 | mcheck_init(c); | |
1137 | #endif | |
74ff305b HS |
1138 | select_idle_routine(c); |
1139 | ||
1da177e4 | 1140 | #ifdef CONFIG_NUMA |
3019e8eb | 1141 | numa_add_cpu(smp_processor_id()); |
1da177e4 | 1142 | #endif |
2b16a235 | 1143 | |
1da177e4 | 1144 | } |
1da177e4 | 1145 | |
7a636af6 GOC |
1146 | void __cpuinit identify_boot_cpu(void) |
1147 | { | |
1148 | identify_cpu(&boot_cpu_data); | |
1149 | } | |
1150 | ||
1151 | void __cpuinit identify_secondary_cpu(struct cpuinfo_x86 *c) | |
1152 | { | |
1153 | BUG_ON(c == &boot_cpu_data); | |
1154 | identify_cpu(c); | |
1155 | mtrr_ap_init(); | |
1156 | } | |
1157 | ||
191679fd AK |
1158 | static __init int setup_noclflush(char *arg) |
1159 | { | |
1160 | setup_clear_cpu_cap(X86_FEATURE_CLFLSH); | |
1161 | return 1; | |
1162 | } | |
1163 | __setup("noclflush", setup_noclflush); | |
1164 | ||
e6982c67 | 1165 | void __cpuinit print_cpu_info(struct cpuinfo_x86 *c) |
1da177e4 LT |
1166 | { |
1167 | if (c->x86_model_id[0]) | |
d8ff0bbf | 1168 | printk(KERN_CONT "%s", c->x86_model_id); |
1da177e4 | 1169 | |
04e1ba85 TG |
1170 | if (c->x86_mask || c->cpuid_level >= 0) |
1171 | printk(KERN_CONT " stepping %02x\n", c->x86_mask); | |
1da177e4 | 1172 | else |
04e1ba85 | 1173 | printk(KERN_CONT "\n"); |
1da177e4 LT |
1174 | } |
1175 | ||
ac72e788 AK |
1176 | static __init int setup_disablecpuid(char *arg) |
1177 | { | |
1178 | int bit; | |
1179 | if (get_option(&arg, &bit) && bit < NCAPINTS*32) | |
1180 | setup_clear_cpu_cap(bit); | |
1181 | else | |
1182 | return 0; | |
1183 | return 1; | |
1184 | } | |
1185 | __setup("clearcpuid=", setup_disablecpuid); |