x86: remove some acpi ifdefs in setup_32/64
[linux-2.6] / arch / x86 / kernel / setup_64.c
1 /*
2  *  Copyright (C) 1995  Linus Torvalds
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>
18 #include <linux/screen_info.h>
19 #include <linux/ioport.h>
20 #include <linux/delay.h>
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>
29 #include <linux/crash_dump.h>
30 #include <linux/root_dev.h>
31 #include <linux/pci.h>
32 #include <asm/pci-direct.h>
33 #include <linux/efi.h>
34 #include <linux/acpi.h>
35 #include <linux/kallsyms.h>
36 #include <linux/edd.h>
37 #include <linux/iscsi_ibft.h>
38 #include <linux/mmzone.h>
39 #include <linux/kexec.h>
40 #include <linux/cpufreq.h>
41 #include <linux/dmi.h>
42 #include <linux/dma-mapping.h>
43 #include <linux/ctype.h>
44 #include <linux/sort.h>
45 #include <linux/uaccess.h>
46 #include <linux/init_ohci1394_dma.h>
47 #include <linux/kvm_para.h>
48
49 #include <asm/mtrr.h>
50 #include <asm/uaccess.h>
51 #include <asm/system.h>
52 #include <asm/vsyscall.h>
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/mpspec.h>
60 #include <asm/dma.h>
61 #include <asm/gart.h>
62 #include <asm/mpspec.h>
63 #include <asm/mmu_context.h>
64 #include <asm/proto.h>
65 #include <asm/setup.h>
66 #include <asm/numa.h>
67 #include <asm/sections.h>
68 #include <asm/dmi.h>
69 #include <asm/cacheflush.h>
70 #include <asm/mce.h>
71 #include <asm/ds.h>
72 #include <asm/topology.h>
73 #include <asm/trampoline.h>
74 #include <asm/pat.h>
75
76 #include <mach_apic.h>
77 #ifdef CONFIG_PARAVIRT
78 #include <asm/paravirt.h>
79 #else
80 #define ARCH_SETUP
81 #endif
82
83 /*
84  * Machine setup..
85  */
86
87 struct cpuinfo_x86 boot_cpu_data __read_mostly;
88 EXPORT_SYMBOL(boot_cpu_data);
89
90 __u32 cleared_cpu_caps[NCAPINTS] __cpuinitdata;
91
92 unsigned long mmu_cr4_features;
93
94 /* Boot loader ID as an integer, for the benefit of proc_dointvec */
95 int bootloader_type;
96
97 unsigned long saved_video_mode;
98
99 /*
100  * Early DMI memory
101  */
102 int dmi_alloc_index;
103 char dmi_alloc_data[DMI_MAX_DATA];
104
105 /*
106  * Setup options
107  */
108 struct screen_info screen_info;
109 EXPORT_SYMBOL(screen_info);
110 struct sys_desc_table_struct {
111         unsigned short length;
112         unsigned char table[0];
113 };
114
115 struct edid_info edid_info;
116 EXPORT_SYMBOL_GPL(edid_info);
117
118 extern int root_mountflags;
119
120 static char __initdata command_line[COMMAND_LINE_SIZE];
121
122 static struct resource standard_io_resources[] = {
123         { .name = "dma1", .start = 0x00, .end = 0x1f,
124                 .flags = IORESOURCE_BUSY | IORESOURCE_IO },
125         { .name = "pic1", .start = 0x20, .end = 0x21,
126                 .flags = IORESOURCE_BUSY | IORESOURCE_IO },
127         { .name = "timer0", .start = 0x40, .end = 0x43,
128                 .flags = IORESOURCE_BUSY | IORESOURCE_IO },
129         { .name = "timer1", .start = 0x50, .end = 0x53,
130                 .flags = IORESOURCE_BUSY | IORESOURCE_IO },
131         { .name = "keyboard", .start = 0x60, .end = 0x60,
132                 .flags = IORESOURCE_BUSY | IORESOURCE_IO },
133         { .name = "keyboard", .start = 0x64, .end = 0x64,
134                 .flags = IORESOURCE_BUSY | IORESOURCE_IO },
135         { .name = "dma page reg", .start = 0x80, .end = 0x8f,
136                 .flags = IORESOURCE_BUSY | IORESOURCE_IO },
137         { .name = "pic2", .start = 0xa0, .end = 0xa1,
138                 .flags = IORESOURCE_BUSY | IORESOURCE_IO },
139         { .name = "dma2", .start = 0xc0, .end = 0xdf,
140                 .flags = IORESOURCE_BUSY | IORESOURCE_IO },
141         { .name = "fpu", .start = 0xf0, .end = 0xff,
142                 .flags = IORESOURCE_BUSY | IORESOURCE_IO }
143 };
144
145 #define IORESOURCE_RAM (IORESOURCE_BUSY | IORESOURCE_MEM)
146
147 static struct resource data_resource = {
148         .name = "Kernel data",
149         .start = 0,
150         .end = 0,
151         .flags = IORESOURCE_RAM,
152 };
153 static struct resource code_resource = {
154         .name = "Kernel code",
155         .start = 0,
156         .end = 0,
157         .flags = IORESOURCE_RAM,
158 };
159 static struct resource bss_resource = {
160         .name = "Kernel bss",
161         .start = 0,
162         .end = 0,
163         .flags = IORESOURCE_RAM,
164 };
165
166 static void __init early_cpu_init(void);
167 static void __cpuinit early_identify_cpu(struct cpuinfo_x86 *c);
168
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)
175 {
176         char *end;
177         if (!arg)
178                 return -EINVAL;
179         elfcorehdr_addr = memparse(arg, &end);
180         return end > arg ? 0 : -EINVAL;
181 }
182 early_param("elfcorehdr", setup_elfcorehdr);
183 #endif
184
185 #ifndef CONFIG_NUMA
186 static void __init
187 contig_initmem_init(unsigned long start_pfn, unsigned long end_pfn)
188 {
189         unsigned long bootmap_size, bootmap;
190
191         bootmap_size = bootmem_bootmap_pages(end_pfn)<<PAGE_SHIFT;
192         bootmap = find_e820_area(0, end_pfn<<PAGE_SHIFT, bootmap_size,
193                                  PAGE_SIZE);
194         if (bootmap == -1L)
195                 panic("Cannot find bootmem map of size %ld\n", bootmap_size);
196         bootmap_size = init_bootmem(bootmap >> PAGE_SHIFT, end_pfn);
197         e820_register_active_regions(0, start_pfn, end_pfn);
198         free_bootmem_with_active_regions(0, end_pfn);
199         early_res_to_bootmem(0, end_pfn<<PAGE_SHIFT);
200         reserve_bootmem(bootmap, bootmap_size, BOOTMEM_DEFAULT);
201 }
202 #endif
203
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 {
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;
221 }
222 #else
223 static inline void copy_edd(void)
224 {
225 }
226 #endif
227
228 /* Overridden in paravirt.c if CONFIG_PARAVIRT */
229 void __attribute__((weak)) __init memory_setup(void)
230 {
231        machine_specific_memory_setup();
232 }
233
234 /* Current gdt points %fs at the "master" per-cpu area: after this,
235  * it's on the real one. */
236 void switch_to_new_gdt(void)
237 {
238         struct desc_ptr gdt_descr;
239
240         gdt_descr.address = (long)get_cpu_gdt_table(smp_processor_id());
241         gdt_descr.size = GDT_SIZE - 1;
242         load_gdt(&gdt_descr);
243 }
244
245 /*
246  * setup_arch - architecture-specific boot-time initializations
247  *
248  * Note: On x86_64, fixmaps are ready for use even before this is called.
249  */
250 void __init setup_arch(char **cmdline_p)
251 {
252         unsigned i;
253
254         printk(KERN_INFO "Command line: %s\n", boot_command_line);
255
256         ROOT_DEV = old_decode_dev(boot_params.hdr.root_dev);
257         screen_info = boot_params.screen_info;
258         edid_info = boot_params.edid_info;
259         saved_video_mode = boot_params.hdr.vid_mode;
260         bootloader_type = boot_params.hdr.type_of_loader;
261
262 #ifdef CONFIG_BLK_DEV_RAM
263         rd_image_start = boot_params.hdr.ram_size & RAMDISK_IMAGE_START_MASK;
264         rd_prompt = ((boot_params.hdr.ram_size & RAMDISK_PROMPT_FLAG) != 0);
265         rd_doload = ((boot_params.hdr.ram_size & RAMDISK_LOAD_FLAG) != 0);
266 #endif
267 #ifdef CONFIG_EFI
268         if (!strncmp((char *)&boot_params.efi_info.efi_loader_signature,
269                      "EL64", 4)) {
270                 efi_enabled = 1;
271                 efi_reserve_early();
272         }
273 #endif
274
275         ARCH_SETUP
276
277         setup_memory_map();
278         copy_edd();
279
280         if (!boot_params.hdr.root_flags)
281                 root_mountflags &= ~MS_RDONLY;
282         init_mm.start_code = (unsigned long) &_text;
283         init_mm.end_code = (unsigned long) &_etext;
284         init_mm.end_data = (unsigned long) &_edata;
285         init_mm.brk = (unsigned long) &_end;
286
287         code_resource.start = virt_to_phys(&_text);
288         code_resource.end = virt_to_phys(&_etext)-1;
289         data_resource.start = virt_to_phys(&_etext);
290         data_resource.end = virt_to_phys(&_edata)-1;
291         bss_resource.start = virt_to_phys(&__bss_start);
292         bss_resource.end = virt_to_phys(&__bss_stop)-1;
293
294         early_cpu_init();
295         early_identify_cpu(&boot_cpu_data);
296
297         strlcpy(command_line, boot_command_line, COMMAND_LINE_SIZE);
298         *cmdline_p = command_line;
299
300         parse_setup_data();
301
302         parse_early_param();
303
304         if (acpi_mps_check()) {
305                 disable_apic = 1;
306                 clear_cpu_cap(&boot_cpu_data, X86_FEATURE_APIC);
307         }
308
309 #ifdef CONFIG_PROVIDE_OHCI1394_DMA_INIT
310         if (init_ohci1394_dma_early)
311                 init_ohci1394_dma_on_all_controllers();
312 #endif
313
314         finish_e820_parsing();
315
316         /* after parse_early_param, so could debug it */
317         insert_resource(&iomem_resource, &code_resource);
318         insert_resource(&iomem_resource, &data_resource);
319         insert_resource(&iomem_resource, &bss_resource);
320
321         early_gart_iommu_check();
322
323         e820_register_active_regions(0, 0, -1UL);
324         /*
325          * partially used pages are not usable - thus
326          * we are rounding upwards:
327          */
328         end_pfn = e820_end_of_ram();
329
330         /* pre allocte 4k for mptable mpc */
331         early_reserve_e820_mpc_new();
332         /* update e820 for memory not covered by WB MTRRs */
333         mtrr_bp_init();
334         if (mtrr_trim_uncached_memory(end_pfn)) {
335                 remove_all_active_ranges();
336                 e820_register_active_regions(0, 0, -1UL);
337                 end_pfn = e820_end_of_ram();
338         }
339
340         num_physpages = end_pfn;
341
342         check_efer();
343
344         max_pfn_mapped = init_memory_mapping(0, (end_pfn << PAGE_SHIFT));
345         if (efi_enabled)
346                 efi_init();
347
348         vsmp_init();
349
350         dmi_scan_machine();
351
352         io_delay_init();
353
354 #ifdef CONFIG_KVM_CLOCK
355         kvmclock_init();
356 #endif
357
358         /*
359          * Initialize the ACPI boot-time table parser (gets the RSDP and SDT).
360          * Call this early for SRAT node setup.
361          */
362         acpi_boot_table_init();
363
364         /* How many end-of-memory variables you have, grandma! */
365         max_low_pfn = end_pfn;
366         max_pfn = end_pfn;
367         high_memory = (void *)__va(end_pfn * PAGE_SIZE - 1) + 1;
368
369         /* Remove active ranges so rediscovery with NUMA-awareness happens */
370         remove_all_active_ranges();
371
372 #ifdef CONFIG_ACPI_NUMA
373         /*
374          * Parse SRAT to discover nodes.
375          */
376         acpi_numa_init();
377 #endif
378
379 #ifdef CONFIG_NUMA
380         numa_initmem_init(0, end_pfn);
381 #else
382         contig_initmem_init(0, end_pfn);
383 #endif
384
385         dma32_reserve_bootmem();
386
387 #ifdef CONFIG_ACPI_SLEEP
388         /*
389          * Reserve low memory region for sleep support.
390          */
391        acpi_reserve_bootmem();
392 #endif
393
394 #ifdef CONFIG_X86_MPPARSE
395        /*
396         * Find and reserve possible boot-time SMP configuration:
397         */
398         find_smp_config();
399 #endif
400 #ifdef CONFIG_BLK_DEV_INITRD
401         if (boot_params.hdr.type_of_loader && boot_params.hdr.ramdisk_image) {
402                 unsigned long ramdisk_image = boot_params.hdr.ramdisk_image;
403                 unsigned long ramdisk_size  = boot_params.hdr.ramdisk_size;
404                 unsigned long ramdisk_end   = ramdisk_image + ramdisk_size;
405                 unsigned long end_of_mem    = end_pfn << PAGE_SHIFT;
406
407                 if (ramdisk_end <= end_of_mem) {
408                         /*
409                          * don't need to reserve again, already reserved early
410                          * in x86_64_start_kernel, and early_res_to_bootmem
411                          * convert that to reserved in bootmem
412                          */
413                         initrd_start = ramdisk_image + PAGE_OFFSET;
414                         initrd_end = initrd_start+ramdisk_size;
415                 } else {
416                         free_bootmem(ramdisk_image, ramdisk_size);
417                         printk(KERN_ERR "initrd extends beyond end of memory "
418                                "(0x%08lx > 0x%08lx)\ndisabling initrd\n",
419                                ramdisk_end, end_of_mem);
420                         initrd_start = 0;
421                 }
422         }
423 #endif
424         reserve_crashkernel();
425
426         reserve_ibft_region();
427
428         paging_init();
429         map_vsyscall();
430
431         early_quirks();
432
433         /*
434          * Read APIC and some other early information from ACPI tables.
435          */
436         acpi_boot_init();
437
438         init_cpu_to_node();
439
440 #ifdef CONFIG_X86_MPPARSE
441         /*
442          * get boot-time SMP configuration:
443          */
444         if (smp_found_config)
445                 get_smp_config();
446 #endif
447         init_apic_mappings();
448         ioapic_init_mappings();
449
450         kvm_guest_init();
451
452         /*
453          * We trust e820 completely. No explicit ROM probing in memory.
454          */
455         e820_reserve_resources();
456         e820_mark_nosave_regions(end_pfn);
457
458         /* request I/O space for devices used on all i[345]86 PCs */
459         for (i = 0; i < ARRAY_SIZE(standard_io_resources); i++)
460                 request_resource(&ioport_resource, &standard_io_resources[i]);
461
462         e820_setup_gap();
463
464 #ifdef CONFIG_VT
465 #if defined(CONFIG_VGA_CONSOLE)
466         if (!efi_enabled || (efi_mem_type(0xa0000) != EFI_CONVENTIONAL_MEMORY))
467                 conswitchp = &vga_con;
468 #elif defined(CONFIG_DUMMY_CONSOLE)
469         conswitchp = &dummy_con;
470 #endif
471 #endif
472 }
473
474 struct cpu_dev *cpu_devs[X86_VENDOR_NUM] = {};
475
476 static void __cpuinit default_init(struct cpuinfo_x86 *c)
477 {
478         display_cacheinfo(c);
479 }
480
481 static struct cpu_dev __cpuinitdata default_cpu = {
482         .c_init = default_init,
483         .c_vendor = "Unknown",
484 };
485 static struct cpu_dev *this_cpu __cpuinitdata = &default_cpu;
486
487 int __cpuinit get_model_name(struct cpuinfo_x86 *c)
488 {
489         unsigned int *v;
490
491         if (c->extended_cpuid_level < 0x80000004)
492                 return 0;
493
494         v = (unsigned int *) c->x86_model_id;
495         cpuid(0x80000002, &v[0], &v[1], &v[2], &v[3]);
496         cpuid(0x80000003, &v[4], &v[5], &v[6], &v[7]);
497         cpuid(0x80000004, &v[8], &v[9], &v[10], &v[11]);
498         c->x86_model_id[48] = 0;
499         return 1;
500 }
501
502
503 void __cpuinit display_cacheinfo(struct cpuinfo_x86 *c)
504 {
505         unsigned int n, dummy, eax, ebx, ecx, edx;
506
507         n = c->extended_cpuid_level;
508
509         if (n >= 0x80000005) {
510                 cpuid(0x80000005, &dummy, &ebx, &ecx, &edx);
511                 printk(KERN_INFO "CPU: L1 I Cache: %dK (%d bytes/line), "
512                        "D cache %dK (%d bytes/line)\n",
513                        edx>>24, edx&0xFF, ecx>>24, ecx&0xFF);
514                 c->x86_cache_size = (ecx>>24) + (edx>>24);
515                 /* On K8 L1 TLB is inclusive, so don't count it */
516                 c->x86_tlbsize = 0;
517         }
518
519         if (n >= 0x80000006) {
520                 cpuid(0x80000006, &dummy, &ebx, &ecx, &edx);
521                 ecx = cpuid_ecx(0x80000006);
522                 c->x86_cache_size = ecx >> 16;
523                 c->x86_tlbsize += ((ebx >> 16) & 0xfff) + (ebx & 0xfff);
524
525                 printk(KERN_INFO "CPU: L2 Cache: %dK (%d bytes/line)\n",
526                 c->x86_cache_size, ecx & 0xFF);
527         }
528         if (n >= 0x80000008) {
529                 cpuid(0x80000008, &eax, &dummy, &dummy, &dummy);
530                 c->x86_virt_bits = (eax >> 8) & 0xff;
531                 c->x86_phys_bits = eax & 0xff;
532         }
533 }
534
535 void __cpuinit detect_ht(struct cpuinfo_x86 *c)
536 {
537 #ifdef CONFIG_SMP
538         u32 eax, ebx, ecx, edx;
539         int index_msb, core_bits;
540
541         cpuid(1, &eax, &ebx, &ecx, &edx);
542
543
544         if (!cpu_has(c, X86_FEATURE_HT))
545                 return;
546         if (cpu_has(c, X86_FEATURE_CMP_LEGACY))
547                 goto out;
548
549         smp_num_siblings = (ebx & 0xff0000) >> 16;
550
551         if (smp_num_siblings == 1) {
552                 printk(KERN_INFO  "CPU: Hyper-Threading is disabled\n");
553         } else if (smp_num_siblings > 1) {
554
555                 if (smp_num_siblings > NR_CPUS) {
556                         printk(KERN_WARNING "CPU: Unsupported number of "
557                                "siblings %d", smp_num_siblings);
558                         smp_num_siblings = 1;
559                         return;
560                 }
561
562                 index_msb = get_count_order(smp_num_siblings);
563                 c->phys_proc_id = phys_pkg_id(index_msb);
564
565                 smp_num_siblings = smp_num_siblings / c->x86_max_cores;
566
567                 index_msb = get_count_order(smp_num_siblings);
568
569                 core_bits = get_count_order(c->x86_max_cores);
570
571                 c->cpu_core_id = phys_pkg_id(index_msb) &
572                                                ((1 << core_bits) - 1);
573         }
574 out:
575         if ((c->x86_max_cores * smp_num_siblings) > 1) {
576                 printk(KERN_INFO  "CPU: Physical Processor ID: %d\n",
577                        c->phys_proc_id);
578                 printk(KERN_INFO  "CPU: Processor Core ID: %d\n",
579                        c->cpu_core_id);
580         }
581
582 #endif
583 }
584
585 static void __cpuinit get_cpu_vendor(struct cpuinfo_x86 *c)
586 {
587         char *v = c->x86_vendor_id;
588         int i;
589         static int printed;
590
591         for (i = 0; i < X86_VENDOR_NUM; i++) {
592                 if (cpu_devs[i]) {
593                         if (!strcmp(v, cpu_devs[i]->c_ident[0]) ||
594                             (cpu_devs[i]->c_ident[1] &&
595                             !strcmp(v, cpu_devs[i]->c_ident[1]))) {
596                                 c->x86_vendor = i;
597                                 this_cpu = cpu_devs[i];
598                                 return;
599                         }
600                 }
601         }
602         if (!printed) {
603                 printed++;
604                 printk(KERN_ERR "CPU: Vendor unknown, using generic init.\n");
605                 printk(KERN_ERR "CPU: Your system may be unstable.\n");
606         }
607         c->x86_vendor = X86_VENDOR_UNKNOWN;
608 }
609
610 static void __init early_cpu_support_print(void)
611 {
612         int i,j;
613         struct cpu_dev *cpu_devx;
614
615         printk("KERNEL supported cpus:\n");
616         for (i = 0; i < X86_VENDOR_NUM; i++) {
617                 cpu_devx = cpu_devs[i];
618                 if (!cpu_devx)
619                         continue;
620                 for (j = 0; j < 2; j++) {
621                         if (!cpu_devx->c_ident[j])
622                                 continue;
623                         printk("  %s %s\n", cpu_devx->c_vendor,
624                                 cpu_devx->c_ident[j]);
625                 }
626         }
627 }
628
629 static void __init early_cpu_init(void)
630 {
631         struct cpu_vendor_dev *cvdev;
632
633         for (cvdev = __x86cpuvendor_start ;
634              cvdev < __x86cpuvendor_end   ;
635              cvdev++)
636                 cpu_devs[cvdev->vendor] = cvdev->cpu_dev;
637         early_cpu_support_print();
638 }
639
640 /* Do some early cpuid on the boot CPU to get some parameter that are
641    needed before check_bugs. Everything advanced is in identify_cpu
642    below. */
643 static void __cpuinit early_identify_cpu(struct cpuinfo_x86 *c)
644 {
645         u32 tfms, xlvl;
646
647         c->loops_per_jiffy = loops_per_jiffy;
648         c->x86_cache_size = -1;
649         c->x86_vendor = X86_VENDOR_UNKNOWN;
650         c->x86_model = c->x86_mask = 0; /* So far unknown... */
651         c->x86_vendor_id[0] = '\0'; /* Unset */
652         c->x86_model_id[0] = '\0';  /* Unset */
653         c->x86_clflush_size = 64;
654         c->x86_cache_alignment = c->x86_clflush_size;
655         c->x86_max_cores = 1;
656         c->x86_coreid_bits = 0;
657         c->extended_cpuid_level = 0;
658         memset(&c->x86_capability, 0, sizeof c->x86_capability);
659
660         /* Get vendor name */
661         cpuid(0x00000000, (unsigned int *)&c->cpuid_level,
662               (unsigned int *)&c->x86_vendor_id[0],
663               (unsigned int *)&c->x86_vendor_id[8],
664               (unsigned int *)&c->x86_vendor_id[4]);
665
666         get_cpu_vendor(c);
667
668         /* Initialize the standard set of capabilities */
669         /* Note that the vendor-specific code below might override */
670
671         /* Intel-defined flags: level 0x00000001 */
672         if (c->cpuid_level >= 0x00000001) {
673                 __u32 misc;
674                 cpuid(0x00000001, &tfms, &misc, &c->x86_capability[4],
675                       &c->x86_capability[0]);
676                 c->x86 = (tfms >> 8) & 0xf;
677                 c->x86_model = (tfms >> 4) & 0xf;
678                 c->x86_mask = tfms & 0xf;
679                 if (c->x86 == 0xf)
680                         c->x86 += (tfms >> 20) & 0xff;
681                 if (c->x86 >= 0x6)
682                         c->x86_model += ((tfms >> 16) & 0xF) << 4;
683                 if (test_cpu_cap(c, X86_FEATURE_CLFLSH))
684                         c->x86_clflush_size = ((misc >> 8) & 0xff) * 8;
685         } else {
686                 /* Have CPUID level 0 only - unheard of */
687                 c->x86 = 4;
688         }
689
690         c->initial_apicid = (cpuid_ebx(1) >> 24) & 0xff;
691 #ifdef CONFIG_SMP
692         c->phys_proc_id = c->initial_apicid;
693 #endif
694         /* AMD-defined flags: level 0x80000001 */
695         xlvl = cpuid_eax(0x80000000);
696         c->extended_cpuid_level = xlvl;
697         if ((xlvl & 0xffff0000) == 0x80000000) {
698                 if (xlvl >= 0x80000001) {
699                         c->x86_capability[1] = cpuid_edx(0x80000001);
700                         c->x86_capability[6] = cpuid_ecx(0x80000001);
701                 }
702                 if (xlvl >= 0x80000004)
703                         get_model_name(c); /* Default name */
704         }
705
706         /* Transmeta-defined flags: level 0x80860001 */
707         xlvl = cpuid_eax(0x80860000);
708         if ((xlvl & 0xffff0000) == 0x80860000) {
709                 /* Don't set x86_cpuid_level here for now to not confuse. */
710                 if (xlvl >= 0x80860001)
711                         c->x86_capability[2] = cpuid_edx(0x80860001);
712         }
713
714         c->extended_cpuid_level = cpuid_eax(0x80000000);
715         if (c->extended_cpuid_level >= 0x80000007)
716                 c->x86_power = cpuid_edx(0x80000007);
717
718         if (c->x86_vendor != X86_VENDOR_UNKNOWN &&
719             cpu_devs[c->x86_vendor]->c_early_init)
720                 cpu_devs[c->x86_vendor]->c_early_init(c);
721
722         validate_pat_support(c);
723
724         /* early_param could clear that, but recall get it set again */
725         if (disable_apic)
726                 clear_cpu_cap(c, X86_FEATURE_APIC);
727 }
728
729 /*
730  * This does the hard work of actually picking apart the CPU stuff...
731  */
732 void __cpuinit identify_cpu(struct cpuinfo_x86 *c)
733 {
734         int i;
735
736         early_identify_cpu(c);
737
738         init_scattered_cpuid_features(c);
739
740         c->apicid = phys_pkg_id(0);
741
742         /*
743          * Vendor-specific initialization.  In this section we
744          * canonicalize the feature flags, meaning if there are
745          * features a certain CPU supports which CPUID doesn't
746          * tell us, CPUID claiming incorrect flags, or other bugs,
747          * we handle them here.
748          *
749          * At the end of this section, c->x86_capability better
750          * indicate the features this CPU genuinely supports!
751          */
752         if (this_cpu->c_init)
753                 this_cpu->c_init(c);
754
755         detect_ht(c);
756
757         /*
758          * On SMP, boot_cpu_data holds the common feature set between
759          * all CPUs; so make sure that we indicate which features are
760          * common between the CPUs.  The first time this routine gets
761          * executed, c == &boot_cpu_data.
762          */
763         if (c != &boot_cpu_data) {
764                 /* AND the already accumulated flags with these */
765                 for (i = 0; i < NCAPINTS; i++)
766                         boot_cpu_data.x86_capability[i] &= c->x86_capability[i];
767         }
768
769         /* Clear all flags overriden by options */
770         for (i = 0; i < NCAPINTS; i++)
771                 c->x86_capability[i] &= ~cleared_cpu_caps[i];
772
773 #ifdef CONFIG_X86_MCE
774         mcheck_init(c);
775 #endif
776         select_idle_routine(c);
777
778 #ifdef CONFIG_NUMA
779         numa_add_cpu(smp_processor_id());
780 #endif
781
782 }
783
784 void __cpuinit identify_boot_cpu(void)
785 {
786         identify_cpu(&boot_cpu_data);
787 }
788
789 void __cpuinit identify_secondary_cpu(struct cpuinfo_x86 *c)
790 {
791         BUG_ON(c == &boot_cpu_data);
792         identify_cpu(c);
793         mtrr_ap_init();
794 }
795
796 static __init int setup_noclflush(char *arg)
797 {
798         setup_clear_cpu_cap(X86_FEATURE_CLFLSH);
799         return 1;
800 }
801 __setup("noclflush", setup_noclflush);
802
803 void __cpuinit print_cpu_info(struct cpuinfo_x86 *c)
804 {
805         if (c->x86_model_id[0])
806                 printk(KERN_CONT "%s", c->x86_model_id);
807
808         if (c->x86_mask || c->cpuid_level >= 0)
809                 printk(KERN_CONT " stepping %02x\n", c->x86_mask);
810         else
811                 printk(KERN_CONT "\n");
812 }
813
814 static __init int setup_disablecpuid(char *arg)
815 {
816         int bit;
817         if (get_option(&arg, &bit) && bit < NCAPINTS*32)
818                 setup_clear_cpu_cap(bit);
819         else
820                 return 0;
821         return 1;
822 }
823 __setup("clearcpuid=", setup_disablecpuid);