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Linus Torvalds1da177e2005-04-16 15:20:36 -07001/*
Linus Torvalds1da177e2005-04-16 15:20:36 -07002 * Copyright (C) 1995 Linus Torvalds
Linus Torvalds1da177e2005-04-16 15:20:36 -07003 */
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>
Jon Smirl894673e2006-07-10 04:44:13 -070018#include <linux/screen_info.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070019#include <linux/ioport.h>
20#include <linux/delay.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070021#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>
Vivek Goyalaac04b32006-01-09 20:51:47 -080029#include <linux/crash_dump.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070030#include <linux/root_dev.h>
31#include <linux/pci.h>
Huang, Ying5b836832008-01-30 13:31:19 +010032#include <linux/efi.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070033#include <linux/acpi.h>
34#include <linux/kallsyms.h>
35#include <linux/edd.h>
Konrad Rzeszutek138fe4e2008-04-09 19:50:41 -070036#include <linux/iscsi_ibft.h>
Matt Tolentinobbfceef2005-06-23 00:08:07 -070037#include <linux/mmzone.h>
Eric W. Biederman5f5609d2005-06-25 14:58:04 -070038#include <linux/kexec.h>
Venkatesh Pallipadi95235ca2005-12-02 10:43:20 -080039#include <linux/cpufreq.h>
Andi Kleene9928672006-01-11 22:43:33 +010040#include <linux/dmi.h>
Muli Ben-Yehuda17a941d2006-01-11 22:44:42 +010041#include <linux/dma-mapping.h>
Andi Kleen681558f2006-03-25 16:29:46 +010042#include <linux/ctype.h>
Glauber de Oliveira Costa746ef0c2008-01-30 13:31:11 +010043#include <linux/uaccess.h>
Bernhard Kaindlf212ec42008-01-30 13:34:11 +010044#include <linux/init_ohci1394_dma.h>
Glauber de Oliveira Costa790c73f2008-02-15 17:52:48 -020045#include <linux/kvm_para.h>
Matt Tolentinobbfceef2005-06-23 00:08:07 -070046
Linus Torvalds1da177e2005-04-16 15:20:36 -070047#include <asm/mtrr.h>
48#include <asm/uaccess.h>
49#include <asm/system.h>
Ingo Molnare4026442008-01-30 13:32:39 +010050#include <asm/vsyscall.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070051#include <asm/io.h>
52#include <asm/smp.h>
53#include <asm/msr.h>
54#include <asm/desc.h>
55#include <video/edid.h>
56#include <asm/e820.h>
57#include <asm/dma.h>
Yinghai Luaaf23042008-01-30 13:33:09 +010058#include <asm/gart.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070059#include <asm/mpspec.h>
60#include <asm/mmu_context.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070061#include <asm/proto.h>
62#include <asm/setup.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070063#include <asm/numa.h>
Andi Kleen2bc04142005-11-05 17:25:53 +010064#include <asm/sections.h>
Andi Kleenf2d3efe2006-03-25 16:30:22 +010065#include <asm/dmi.h>
Bernhard Walle00bf4092007-10-21 16:42:01 -070066#include <asm/cacheflush.h>
Thomas Gleixneraf7a78e2008-01-30 13:30:17 +010067#include <asm/mce.h>
Markus Metzgereee3af42008-01-30 13:31:09 +010068#include <asm/ds.h>
travis@sgi.comdf3825c2008-01-30 13:33:11 +010069#include <asm/topology.h>
Pavel Macheke44b7b72008-04-10 23:28:10 +020070#include <asm/trampoline.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070071
Glauber Costadd46e3c2008-03-25 18:10:46 -030072#include <mach_apic.h>
Glauber de Oliveira Costa746ef0c2008-01-30 13:31:11 +010073#ifdef CONFIG_PARAVIRT
74#include <asm/paravirt.h>
75#else
76#define ARCH_SETUP
77#endif
78
Linus Torvalds1da177e2005-04-16 15:20:36 -070079/*
80 * Machine setup..
81 */
82
Ravikiran G Thirumalai6c231b72005-09-06 15:17:45 -070083struct cpuinfo_x86 boot_cpu_data __read_mostly;
Andi Kleen2ee60e172006-06-26 13:59:44 +020084EXPORT_SYMBOL(boot_cpu_data);
Linus Torvalds1da177e2005-04-16 15:20:36 -070085
Andi Kleen7d851c82008-01-30 13:33:20 +010086__u32 cleared_cpu_caps[NCAPINTS] __cpuinitdata;
87
Linus Torvalds1da177e2005-04-16 15:20:36 -070088unsigned long mmu_cr4_features;
89
Linus Torvalds1da177e2005-04-16 15:20:36 -070090/* Boot loader ID as an integer, for the benefit of proc_dointvec */
91int bootloader_type;
92
93unsigned long saved_video_mode;
94
Andi Kleenf039b752007-05-02 19:27:12 +020095int force_mwait __cpuinitdata;
96
Thomas Gleixner04e1ba82008-01-30 13:30:39 +010097/*
Andi Kleenf2d3efe2006-03-25 16:30:22 +010098 * Early DMI memory
99 */
100int dmi_alloc_index;
101char dmi_alloc_data[DMI_MAX_DATA];
102
Linus Torvalds1da177e2005-04-16 15:20:36 -0700103/*
104 * Setup options
105 */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700106struct screen_info screen_info;
Andi Kleen2ee60e172006-06-26 13:59:44 +0200107EXPORT_SYMBOL(screen_info);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700108struct sys_desc_table_struct {
109 unsigned short length;
110 unsigned char table[0];
111};
112
113struct edid_info edid_info;
Antonino A. Daplasba707102006-06-26 00:26:37 -0700114EXPORT_SYMBOL_GPL(edid_info);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700115
116extern int root_mountflags;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700117
Alon Bar-Levadf48852007-02-12 00:54:25 -0800118char __initdata command_line[COMMAND_LINE_SIZE];
Linus Torvalds1da177e2005-04-16 15:20:36 -0700119
Dmitri Vorobieva2b4bd92008-04-20 06:54:33 +0400120static struct resource standard_io_resources[] = {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700121 { .name = "dma1", .start = 0x00, .end = 0x1f,
122 .flags = IORESOURCE_BUSY | IORESOURCE_IO },
123 { .name = "pic1", .start = 0x20, .end = 0x21,
124 .flags = IORESOURCE_BUSY | IORESOURCE_IO },
125 { .name = "timer0", .start = 0x40, .end = 0x43,
126 .flags = IORESOURCE_BUSY | IORESOURCE_IO },
127 { .name = "timer1", .start = 0x50, .end = 0x53,
128 .flags = IORESOURCE_BUSY | IORESOURCE_IO },
129 { .name = "keyboard", .start = 0x60, .end = 0x6f,
130 .flags = IORESOURCE_BUSY | IORESOURCE_IO },
131 { .name = "dma page reg", .start = 0x80, .end = 0x8f,
132 .flags = IORESOURCE_BUSY | IORESOURCE_IO },
133 { .name = "pic2", .start = 0xa0, .end = 0xa1,
134 .flags = IORESOURCE_BUSY | IORESOURCE_IO },
135 { .name = "dma2", .start = 0xc0, .end = 0xdf,
136 .flags = IORESOURCE_BUSY | IORESOURCE_IO },
137 { .name = "fpu", .start = 0xf0, .end = 0xff,
138 .flags = IORESOURCE_BUSY | IORESOURCE_IO }
139};
140
Linus Torvalds1da177e2005-04-16 15:20:36 -0700141#define IORESOURCE_RAM (IORESOURCE_BUSY | IORESOURCE_MEM)
142
Bernhard Wallec9cce832008-01-30 13:30:32 +0100143static struct resource data_resource = {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700144 .name = "Kernel data",
145 .start = 0,
146 .end = 0,
147 .flags = IORESOURCE_RAM,
148};
Bernhard Wallec9cce832008-01-30 13:30:32 +0100149static struct resource code_resource = {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700150 .name = "Kernel code",
151 .start = 0,
152 .end = 0,
153 .flags = IORESOURCE_RAM,
154};
Bernhard Wallec9cce832008-01-30 13:30:32 +0100155static struct resource bss_resource = {
Bernhard Walle00bf4092007-10-21 16:42:01 -0700156 .name = "Kernel bss",
157 .start = 0,
158 .end = 0,
159 .flags = IORESOURCE_RAM,
160};
Linus Torvalds1da177e2005-04-16 15:20:36 -0700161
Thomas Gleixner8c61b902008-01-30 13:30:16 +0100162static void __cpuinit early_identify_cpu(struct cpuinfo_x86 *c);
163
Vivek Goyalaac04b32006-01-09 20:51:47 -0800164#ifdef CONFIG_PROC_VMCORE
Andi Kleen2c8c0e62006-09-26 10:52:32 +0200165/* elfcorehdr= specifies the location of elf core header
166 * stored by the crashed kernel. This option will be passed
167 * by kexec loader to the capture kernel.
168 */
169static int __init setup_elfcorehdr(char *arg)
170{
171 char *end;
172 if (!arg)
173 return -EINVAL;
174 elfcorehdr_addr = memparse(arg, &end);
175 return end > arg ? 0 : -EINVAL;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700176}
Andi Kleen2c8c0e62006-09-26 10:52:32 +0200177early_param("elfcorehdr", setup_elfcorehdr);
178#endif
Linus Torvalds1da177e2005-04-16 15:20:36 -0700179
Matt Tolentino2b976902005-06-23 00:08:06 -0700180#ifndef CONFIG_NUMA
Matt Tolentinobbfceef2005-06-23 00:08:07 -0700181static void __init
182contig_initmem_init(unsigned long start_pfn, unsigned long end_pfn)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700183{
Matt Tolentinobbfceef2005-06-23 00:08:07 -0700184 unsigned long bootmap_size, bootmap;
185
Matt Tolentinobbfceef2005-06-23 00:08:07 -0700186 bootmap_size = bootmem_bootmap_pages(end_pfn)<<PAGE_SHIFT;
Yinghai Lu24a5da72008-02-01 17:49:41 +0100187 bootmap = find_e820_area(0, end_pfn<<PAGE_SHIFT, bootmap_size,
188 PAGE_SIZE);
Matt Tolentinobbfceef2005-06-23 00:08:07 -0700189 if (bootmap == -1L)
Thomas Gleixner04e1ba82008-01-30 13:30:39 +0100190 panic("Cannot find bootmem map of size %ld\n", bootmap_size);
Matt Tolentinobbfceef2005-06-23 00:08:07 -0700191 bootmap_size = init_bootmem(bootmap >> PAGE_SHIFT, end_pfn);
Mel Gorman5cb248a2006-09-27 01:49:52 -0700192 e820_register_active_regions(0, start_pfn, end_pfn);
193 free_bootmem_with_active_regions(0, end_pfn);
Yinghai Lu1a27fc02008-03-18 12:52:37 -0700194 early_res_to_bootmem(0, end_pfn<<PAGE_SHIFT);
Bernhard Walle72a7fe32008-02-07 00:15:17 -0800195 reserve_bootmem(bootmap, bootmap_size, BOOTMEM_DEFAULT);
Thomas Gleixner04e1ba82008-01-30 13:30:39 +0100196}
Linus Torvalds1da177e2005-04-16 15:20:36 -0700197#endif
198
Linus Torvalds1da177e2005-04-16 15:20:36 -0700199#if defined(CONFIG_EDD) || defined(CONFIG_EDD_MODULE)
200struct edd edd;
201#ifdef CONFIG_EDD_MODULE
202EXPORT_SYMBOL(edd);
203#endif
204/**
205 * copy_edd() - Copy the BIOS EDD information
206 * from boot_params into a safe place.
207 *
208 */
209static inline void copy_edd(void)
210{
H. Peter Anvin30c82642007-10-15 17:13:22 -0700211 memcpy(edd.mbr_signature, boot_params.edd_mbr_sig_buffer,
212 sizeof(edd.mbr_signature));
213 memcpy(edd.edd_info, boot_params.eddbuf, sizeof(edd.edd_info));
214 edd.mbr_signature_nr = boot_params.edd_mbr_sig_buf_entries;
215 edd.edd_info_nr = boot_params.eddbuf_entries;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700216}
217#else
218static inline void copy_edd(void)
219{
220}
221#endif
222
Bernhard Walle5c3391f2007-10-18 23:40:59 -0700223#ifdef CONFIG_KEXEC
224static void __init reserve_crashkernel(void)
225{
Bernhard Walle18a01a3b2008-02-07 00:15:19 -0800226 unsigned long long total_mem;
Bernhard Walle5c3391f2007-10-18 23:40:59 -0700227 unsigned long long crash_size, crash_base;
228 int ret;
229
Bernhard Walle18a01a3b2008-02-07 00:15:19 -0800230 total_mem = ((unsigned long long)max_low_pfn - min_low_pfn) << PAGE_SHIFT;
Bernhard Walle5c3391f2007-10-18 23:40:59 -0700231
Bernhard Walle18a01a3b2008-02-07 00:15:19 -0800232 ret = parse_crashkernel(boot_command_line, total_mem,
Bernhard Walle5c3391f2007-10-18 23:40:59 -0700233 &crash_size, &crash_base);
234 if (ret == 0 && crash_size) {
Bernhard Walle18a01a3b2008-02-07 00:15:19 -0800235 if (crash_base <= 0) {
Bernhard Walle5c3391f2007-10-18 23:40:59 -0700236 printk(KERN_INFO "crashkernel reservation failed - "
237 "you have to specify a base address\n");
Bernhard Walle18a01a3b2008-02-07 00:15:19 -0800238 return;
239 }
240
241 if (reserve_bootmem(crash_base, crash_size,
242 BOOTMEM_EXCLUSIVE) < 0) {
243 printk(KERN_INFO "crashkernel reservation failed - "
244 "memory is in use\n");
245 return;
246 }
247
248 printk(KERN_INFO "Reserving %ldMB of memory at %ldMB "
249 "for crashkernel (System RAM: %ldMB)\n",
250 (unsigned long)(crash_size >> 20),
251 (unsigned long)(crash_base >> 20),
252 (unsigned long)(total_mem >> 20));
253 crashk_res.start = crash_base;
254 crashk_res.end = crash_base + crash_size - 1;
Yinghai Lu3def3d62008-02-22 17:07:16 -0800255 insert_resource(&iomem_resource, &crashk_res);
Bernhard Walle5c3391f2007-10-18 23:40:59 -0700256 }
257}
258#else
259static inline void __init reserve_crashkernel(void)
260{}
261#endif
262
Glauber de Oliveira Costa746ef0c2008-01-30 13:31:11 +0100263/* Overridden in paravirt.c if CONFIG_PARAVIRT */
Andi Kleene3cfac82008-01-30 13:32:49 +0100264void __attribute__((weak)) __init memory_setup(void)
Glauber de Oliveira Costa746ef0c2008-01-30 13:31:11 +0100265{
266 machine_specific_memory_setup();
267}
268
Huang, Ying8b664aa2008-03-28 10:49:44 +0800269static void __init parse_setup_data(void)
270{
271 struct setup_data *data;
272 unsigned long pa_data;
273
274 if (boot_params.hdr.version < 0x0209)
275 return;
276 pa_data = boot_params.hdr.setup_data;
277 while (pa_data) {
278 data = early_ioremap(pa_data, PAGE_SIZE);
279 switch (data->type) {
280 default:
281 break;
282 }
Huang, Yingc14b2ad2008-03-28 10:49:48 +0800283#ifndef CONFIG_DEBUG_BOOT_PARAMS
Huang, Ying8b664aa2008-03-28 10:49:44 +0800284 free_early(pa_data, pa_data+sizeof(*data)+data->len);
Huang, Yingc14b2ad2008-03-28 10:49:48 +0800285#endif
Huang, Ying8b664aa2008-03-28 10:49:44 +0800286 pa_data = data->next;
287 early_iounmap(data, PAGE_SIZE);
288 }
289}
290
Bernhard Kaindlf212ec42008-01-30 13:34:11 +0100291/*
292 * setup_arch - architecture-specific boot-time initializations
293 *
294 * Note: On x86_64, fixmaps are ready for use even before this is called.
295 */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700296void __init setup_arch(char **cmdline_p)
297{
Thomas Gleixner04e1ba82008-01-30 13:30:39 +0100298 unsigned i;
299
Alon Bar-Levadf48852007-02-12 00:54:25 -0800300 printk(KERN_INFO "Command line: %s\n", boot_command_line);
Andi Kleen43c85c92006-09-26 10:52:32 +0200301
H. Peter Anvin30c82642007-10-15 17:13:22 -0700302 ROOT_DEV = old_decode_dev(boot_params.hdr.root_dev);
303 screen_info = boot_params.screen_info;
304 edid_info = boot_params.edid_info;
305 saved_video_mode = boot_params.hdr.vid_mode;
306 bootloader_type = boot_params.hdr.type_of_loader;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700307
308#ifdef CONFIG_BLK_DEV_RAM
H. Peter Anvin30c82642007-10-15 17:13:22 -0700309 rd_image_start = boot_params.hdr.ram_size & RAMDISK_IMAGE_START_MASK;
310 rd_prompt = ((boot_params.hdr.ram_size & RAMDISK_PROMPT_FLAG) != 0);
311 rd_doload = ((boot_params.hdr.ram_size & RAMDISK_LOAD_FLAG) != 0);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700312#endif
Huang, Ying5b836832008-01-30 13:31:19 +0100313#ifdef CONFIG_EFI
314 if (!strncmp((char *)&boot_params.efi_info.efi_loader_signature,
315 "EL64", 4))
316 efi_enabled = 1;
317#endif
Glauber de Oliveira Costa746ef0c2008-01-30 13:31:11 +0100318
319 ARCH_SETUP
320
321 memory_setup();
Linus Torvalds1da177e2005-04-16 15:20:36 -0700322 copy_edd();
323
H. Peter Anvin30c82642007-10-15 17:13:22 -0700324 if (!boot_params.hdr.root_flags)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700325 root_mountflags &= ~MS_RDONLY;
326 init_mm.start_code = (unsigned long) &_text;
327 init_mm.end_code = (unsigned long) &_etext;
328 init_mm.end_data = (unsigned long) &_edata;
329 init_mm.brk = (unsigned long) &_end;
330
Linus Torvaldse3ebadd2007-05-07 08:44:24 -0700331 code_resource.start = virt_to_phys(&_text);
332 code_resource.end = virt_to_phys(&_etext)-1;
333 data_resource.start = virt_to_phys(&_etext);
334 data_resource.end = virt_to_phys(&_edata)-1;
Bernhard Walle00bf4092007-10-21 16:42:01 -0700335 bss_resource.start = virt_to_phys(&__bss_start);
336 bss_resource.end = virt_to_phys(&__bss_stop)-1;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700337
Linus Torvalds1da177e2005-04-16 15:20:36 -0700338 early_identify_cpu(&boot_cpu_data);
339
Alon Bar-Levadf48852007-02-12 00:54:25 -0800340 strlcpy(command_line, boot_command_line, COMMAND_LINE_SIZE);
Andi Kleen2c8c0e62006-09-26 10:52:32 +0200341 *cmdline_p = command_line;
342
Huang, Ying8b664aa2008-03-28 10:49:44 +0800343 parse_setup_data();
344
Andi Kleen2c8c0e62006-09-26 10:52:32 +0200345 parse_early_param();
346
Bernhard Kaindlf212ec42008-01-30 13:34:11 +0100347#ifdef CONFIG_PROVIDE_OHCI1394_DMA_INIT
348 if (init_ohci1394_dma_early)
349 init_ohci1394_dma_on_all_controllers();
350#endif
351
Andi Kleen2c8c0e62006-09-26 10:52:32 +0200352 finish_e820_parsing();
Andi Kleen9ca33eb2006-09-26 10:52:32 +0200353
Yinghai Lu3def3d62008-02-22 17:07:16 -0800354 /* after parse_early_param, so could debug it */
355 insert_resource(&iomem_resource, &code_resource);
356 insert_resource(&iomem_resource, &data_resource);
357 insert_resource(&iomem_resource, &bss_resource);
358
Yinghai Luaaf23042008-01-30 13:33:09 +0100359 early_gart_iommu_check();
360
Mel Gorman5cb248a2006-09-27 01:49:52 -0700361 e820_register_active_regions(0, 0, -1UL);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700362 /*
363 * partially used pages are not usable - thus
364 * we are rounding upwards:
365 */
366 end_pfn = e820_end_of_ram();
Jesse Barnes99fc8d42008-01-30 13:33:18 +0100367 /* update e820 for memory not covered by WB MTRRs */
368 mtrr_bp_init();
369 if (mtrr_trim_uncached_memory(end_pfn)) {
370 e820_register_active_regions(0, 0, -1UL);
371 end_pfn = e820_end_of_ram();
372 }
373
Jan Beulichcaff0712006-09-26 10:52:31 +0200374 num_physpages = end_pfn;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700375
376 check_efer();
377
Andi Kleencc615032008-03-12 03:53:28 +0100378 max_pfn_mapped = init_memory_mapping(0, (max_pfn_mapped << PAGE_SHIFT));
Huang, Ying5b836832008-01-30 13:31:19 +0100379 if (efi_enabled)
380 efi_init();
Linus Torvalds1da177e2005-04-16 15:20:36 -0700381
Glauber Costa2785c8d2008-02-11 17:16:03 -0200382 vsmp_init();
Glauber Costa2785c8d2008-02-11 17:16:03 -0200383
Andi Kleenf2d3efe2006-03-25 16:30:22 +0100384 dmi_scan_machine();
385
Rene Hermanb02aae92008-01-30 13:30:05 +0100386 io_delay_init();
387
Glauber de Oliveira Costa790c73f2008-02-15 17:52:48 -0200388#ifdef CONFIG_KVM_CLOCK
389 kvmclock_init();
390#endif
391
Mike Travis71fff5e2007-10-19 20:35:03 +0200392#ifdef CONFIG_SMP
travis@sgi.comdf3825c2008-01-30 13:33:11 +0100393 /* setup to use the early static init tables during kernel startup */
Yinghai Lu3effef12008-01-30 13:33:33 +0100394 x86_cpu_to_apicid_early_ptr = (void *)x86_cpu_to_apicid_init;
395 x86_bios_cpu_apicid_early_ptr = (void *)x86_bios_cpu_apicid_init;
travis@sgi.come8c10ef2008-01-30 13:33:12 +0100396#ifdef CONFIG_NUMA
Yinghai Lu3effef12008-01-30 13:33:33 +0100397 x86_cpu_to_node_map_early_ptr = (void *)x86_cpu_to_node_map_init;
Mike Travis71fff5e2007-10-19 20:35:03 +0200398#endif
travis@sgi.come8c10ef2008-01-30 13:33:12 +0100399#endif
Mike Travis71fff5e2007-10-19 20:35:03 +0200400
Len Brown888ba6c2005-08-24 12:07:20 -0400401#ifdef CONFIG_ACPI
Linus Torvalds1da177e2005-04-16 15:20:36 -0700402 /*
403 * Initialize the ACPI boot-time table parser (gets the RSDP and SDT).
404 * Call this early for SRAT node setup.
405 */
406 acpi_boot_table_init();
407#endif
408
Jan Beulichcaff0712006-09-26 10:52:31 +0200409 /* How many end-of-memory variables you have, grandma! */
410 max_low_pfn = end_pfn;
411 max_pfn = end_pfn;
412 high_memory = (void *)__va(end_pfn * PAGE_SIZE - 1) + 1;
413
Mel Gorman5cb248a2006-09-27 01:49:52 -0700414 /* Remove active ranges so rediscovery with NUMA-awareness happens */
415 remove_all_active_ranges();
416
Linus Torvalds1da177e2005-04-16 15:20:36 -0700417#ifdef CONFIG_ACPI_NUMA
418 /*
419 * Parse SRAT to discover nodes.
420 */
421 acpi_numa_init();
422#endif
423
Matt Tolentino2b976902005-06-23 00:08:06 -0700424#ifdef CONFIG_NUMA
Thomas Gleixner04e1ba82008-01-30 13:30:39 +0100425 numa_initmem_init(0, end_pfn);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700426#else
Matt Tolentinobbfceef2005-06-23 00:08:07 -0700427 contig_initmem_init(0, end_pfn);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700428#endif
429
Yinghai Lu752bea42008-03-07 15:02:50 -0800430 dma32_reserve_bootmem();
431
Len Brown673d5b42007-07-28 03:33:16 -0400432#ifdef CONFIG_ACPI_SLEEP
Thomas Gleixner04e1ba82008-01-30 13:30:39 +0100433 /*
434 * Reserve low memory region for sleep support.
435 */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700436 acpi_reserve_bootmem();
437#endif
Huang, Ying5b836832008-01-30 13:31:19 +0100438
Huang, Yinga3828062008-01-30 13:34:10 +0100439 if (efi_enabled)
Huang, Ying5b836832008-01-30 13:31:19 +0100440 efi_reserve_bootmem();
Huang, Ying5b836832008-01-30 13:31:19 +0100441
Thomas Gleixner04e1ba82008-01-30 13:30:39 +0100442 /*
443 * Find and reserve possible boot-time SMP configuration:
444 */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700445 find_smp_config();
Linus Torvalds1da177e2005-04-16 15:20:36 -0700446#ifdef CONFIG_BLK_DEV_INITRD
H. Peter Anvin30c82642007-10-15 17:13:22 -0700447 if (boot_params.hdr.type_of_loader && boot_params.hdr.ramdisk_image) {
448 unsigned long ramdisk_image = boot_params.hdr.ramdisk_image;
449 unsigned long ramdisk_size = boot_params.hdr.ramdisk_size;
450 unsigned long ramdisk_end = ramdisk_image + ramdisk_size;
451 unsigned long end_of_mem = end_pfn << PAGE_SHIFT;
452
453 if (ramdisk_end <= end_of_mem) {
Yinghai Lu2b8106a2008-03-18 12:51:22 -0700454 /*
455 * don't need to reserve again, already reserved early
456 * in x86_64_start_kernel, and early_res_to_bootmem
457 * convert that to reserved in bootmem
458 */
H. Peter Anvin30c82642007-10-15 17:13:22 -0700459 initrd_start = ramdisk_image + PAGE_OFFSET;
460 initrd_end = initrd_start+ramdisk_size;
461 } else {
Andi Kleen75175272008-01-30 13:33:17 +0100462 free_bootmem(ramdisk_image, ramdisk_size);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700463 printk(KERN_ERR "initrd extends beyond end of memory "
H. Peter Anvin30c82642007-10-15 17:13:22 -0700464 "(0x%08lx > 0x%08lx)\ndisabling initrd\n",
465 ramdisk_end, end_of_mem);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700466 initrd_start = 0;
467 }
468 }
469#endif
Bernhard Walle5c3391f2007-10-18 23:40:59 -0700470 reserve_crashkernel();
Konrad Rzeszutek138fe4e2008-04-09 19:50:41 -0700471
472 reserve_ibft_region();
473
Linus Torvalds1da177e2005-04-16 15:20:36 -0700474 paging_init();
Ingo Molnare4026442008-01-30 13:32:39 +0100475 map_vsyscall();
Linus Torvalds1da177e2005-04-16 15:20:36 -0700476
Andi Kleendfa46982006-09-26 10:52:30 +0200477 early_quirks();
Linus Torvalds1da177e2005-04-16 15:20:36 -0700478
Len Brown888ba6c2005-08-24 12:07:20 -0400479#ifdef CONFIG_ACPI
Linus Torvalds1da177e2005-04-16 15:20:36 -0700480 /*
481 * Read APIC and some other early information from ACPI tables.
482 */
483 acpi_boot_init();
484#endif
485
Ravikiran Thirumalai05b3cbd2006-01-11 22:45:36 +0100486 init_cpu_to_node();
487
Linus Torvalds1da177e2005-04-16 15:20:36 -0700488 /*
489 * get boot-time SMP configuration:
490 */
491 if (smp_found_config)
492 get_smp_config();
493 init_apic_mappings();
Thomas Gleixner3e35a0e2008-01-30 13:30:19 +0100494 ioapic_init_mappings();
Linus Torvalds1da177e2005-04-16 15:20:36 -0700495
Marcelo Tosatti0cf1bfd2008-02-22 12:21:36 -0500496 kvm_guest_init();
497
Linus Torvalds1da177e2005-04-16 15:20:36 -0700498 /*
Andi Kleenfc986db2007-02-13 13:26:24 +0100499 * We trust e820 completely. No explicit ROM probing in memory.
Thomas Gleixner04e1ba82008-01-30 13:30:39 +0100500 */
Yinghai Lu3def3d62008-02-22 17:07:16 -0800501 e820_reserve_resources();
Rafael J. Wysockie8eff5a2006-09-25 23:32:46 -0700502 e820_mark_nosave_regions();
Linus Torvalds1da177e2005-04-16 15:20:36 -0700503
Linus Torvalds1da177e2005-04-16 15:20:36 -0700504 /* request I/O space for devices used on all i[345]86 PCs */
Andi Kleen9d0ef4f2006-09-30 01:47:55 +0200505 for (i = 0; i < ARRAY_SIZE(standard_io_resources); i++)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700506 request_resource(&ioport_resource, &standard_io_resources[i]);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700507
Andi Kleena1e97782005-04-16 15:25:12 -0700508 e820_setup_gap();
Linus Torvalds1da177e2005-04-16 15:20:36 -0700509
Linus Torvalds1da177e2005-04-16 15:20:36 -0700510#ifdef CONFIG_VT
511#if defined(CONFIG_VGA_CONSOLE)
Huang, Ying5b836832008-01-30 13:31:19 +0100512 if (!efi_enabled || (efi_mem_type(0xa0000) != EFI_CONVENTIONAL_MEMORY))
513 conswitchp = &vga_con;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700514#elif defined(CONFIG_DUMMY_CONSOLE)
515 conswitchp = &dummy_con;
516#endif
517#endif
518}
519
Ashok Raje6982c62005-06-25 14:54:58 -0700520static int __cpuinit get_model_name(struct cpuinfo_x86 *c)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700521{
522 unsigned int *v;
523
Andi Kleenebfcaa92005-04-16 15:25:18 -0700524 if (c->extended_cpuid_level < 0x80000004)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700525 return 0;
526
527 v = (unsigned int *) c->x86_model_id;
528 cpuid(0x80000002, &v[0], &v[1], &v[2], &v[3]);
529 cpuid(0x80000003, &v[4], &v[5], &v[6], &v[7]);
530 cpuid(0x80000004, &v[8], &v[9], &v[10], &v[11]);
531 c->x86_model_id[48] = 0;
532 return 1;
533}
534
535
Ashok Raje6982c62005-06-25 14:54:58 -0700536static void __cpuinit display_cacheinfo(struct cpuinfo_x86 *c)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700537{
538 unsigned int n, dummy, eax, ebx, ecx, edx;
539
Andi Kleenebfcaa92005-04-16 15:25:18 -0700540 n = c->extended_cpuid_level;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700541
542 if (n >= 0x80000005) {
543 cpuid(0x80000005, &dummy, &ebx, &ecx, &edx);
Thomas Gleixner04e1ba82008-01-30 13:30:39 +0100544 printk(KERN_INFO "CPU: L1 I Cache: %dK (%d bytes/line), "
545 "D cache %dK (%d bytes/line)\n",
546 edx>>24, edx&0xFF, ecx>>24, ecx&0xFF);
547 c->x86_cache_size = (ecx>>24) + (edx>>24);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700548 /* On K8 L1 TLB is inclusive, so don't count it */
549 c->x86_tlbsize = 0;
550 }
551
552 if (n >= 0x80000006) {
553 cpuid(0x80000006, &dummy, &ebx, &ecx, &edx);
554 ecx = cpuid_ecx(0x80000006);
555 c->x86_cache_size = ecx >> 16;
556 c->x86_tlbsize += ((ebx >> 16) & 0xfff) + (ebx & 0xfff);
557
558 printk(KERN_INFO "CPU: L2 Cache: %dK (%d bytes/line)\n",
559 c->x86_cache_size, ecx & 0xFF);
560 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700561 if (n >= 0x80000008) {
Thomas Gleixner04e1ba82008-01-30 13:30:39 +0100562 cpuid(0x80000008, &eax, &dummy, &dummy, &dummy);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700563 c->x86_virt_bits = (eax >> 8) & 0xff;
564 c->x86_phys_bits = eax & 0xff;
565 }
566}
567
Andi Kleen3f098c22005-09-12 18:49:24 +0200568#ifdef CONFIG_NUMA
Sam Ravnborg08acb672008-02-17 13:22:46 +0100569static int __cpuinit nearby_node(int apicid)
Andi Kleen3f098c22005-09-12 18:49:24 +0200570{
Thomas Gleixner04e1ba82008-01-30 13:30:39 +0100571 int i, node;
572
Andi Kleen3f098c22005-09-12 18:49:24 +0200573 for (i = apicid - 1; i >= 0; i--) {
Thomas Gleixner04e1ba82008-01-30 13:30:39 +0100574 node = apicid_to_node[i];
Andi Kleen3f098c22005-09-12 18:49:24 +0200575 if (node != NUMA_NO_NODE && node_online(node))
576 return node;
577 }
578 for (i = apicid + 1; i < MAX_LOCAL_APIC; i++) {
Thomas Gleixner04e1ba82008-01-30 13:30:39 +0100579 node = apicid_to_node[i];
Andi Kleen3f098c22005-09-12 18:49:24 +0200580 if (node != NUMA_NO_NODE && node_online(node))
581 return node;
582 }
583 return first_node(node_online_map); /* Shouldn't happen */
584}
585#endif
586
Andi Kleen63518642005-04-16 15:25:16 -0700587/*
588 * On a AMD dual core setup the lower bits of the APIC id distingush the cores.
589 * Assumes number of cores is a power of two.
590 */
Sam Ravnborgadb8dae2008-01-30 13:33:37 +0100591static void __cpuinit amd_detect_cmp(struct cpuinfo_x86 *c)
Andi Kleen63518642005-04-16 15:25:16 -0700592{
593#ifdef CONFIG_SMP
Andi Kleenb41e2932005-05-20 14:27:55 -0700594 unsigned bits;
Andi Kleen3f098c22005-09-12 18:49:24 +0200595#ifdef CONFIG_NUMA
Rohit Sethf3fa8eb2006-06-26 13:58:17 +0200596 int cpu = smp_processor_id();
Andi Kleen3f098c22005-09-12 18:49:24 +0200597 int node = 0;
Ravikiran G Thirumalai60c1bc82006-03-25 16:30:04 +0100598 unsigned apicid = hard_smp_processor_id();
Andi Kleen3f098c22005-09-12 18:49:24 +0200599#endif
Yinghai Lua860b632008-01-30 13:30:39 +0100600 bits = c->x86_coreid_bits;
Andi Kleenb41e2932005-05-20 14:27:55 -0700601
602 /* Low order bits define the core id (index of core in socket) */
Yinghai Lu01aaea12008-03-06 13:46:39 -0800603 c->cpu_core_id = c->initial_apicid & ((1 << bits)-1);
604 /* Convert the initial APIC ID into the socket ID */
605 c->phys_proc_id = c->initial_apicid >> bits;
Andi Kleen63518642005-04-16 15:25:16 -0700606
607#ifdef CONFIG_NUMA
Thomas Gleixner04e1ba82008-01-30 13:30:39 +0100608 node = c->phys_proc_id;
609 if (apicid_to_node[apicid] != NUMA_NO_NODE)
610 node = apicid_to_node[apicid];
611 if (!node_online(node)) {
612 /* Two possibilities here:
613 - The CPU is missing memory and no node was created.
614 In that case try picking one from a nearby CPU
615 - The APIC IDs differ from the HyperTransport node IDs
616 which the K8 northbridge parsing fills in.
617 Assume they are all increased by a constant offset,
618 but in the same order as the HT nodeids.
619 If that doesn't result in a usable node fall back to the
620 path for the previous case. */
621
Yinghai Lu01aaea12008-03-06 13:46:39 -0800622 int ht_nodeid = c->initial_apicid;
Thomas Gleixner04e1ba82008-01-30 13:30:39 +0100623
624 if (ht_nodeid >= 0 &&
625 apicid_to_node[ht_nodeid] != NUMA_NO_NODE)
626 node = apicid_to_node[ht_nodeid];
627 /* Pick a nearby node */
628 if (!node_online(node))
629 node = nearby_node(apicid);
630 }
Andi Kleen69d81fc2005-11-05 17:25:53 +0100631 numa_set_node(cpu, node);
Andi Kleena1586082005-05-16 21:53:21 -0700632
Rohit Sethe42f9432006-06-26 13:59:14 +0200633 printk(KERN_INFO "CPU %d/%x -> Node %d\n", cpu, apicid, node);
Andi Kleen3f098c22005-09-12 18:49:24 +0200634#endif
Andi Kleen63518642005-04-16 15:25:16 -0700635#endif
636}
Linus Torvalds1da177e2005-04-16 15:20:36 -0700637
Andi Kleen2b16a232008-01-30 13:32:40 +0100638static void __cpuinit early_init_amd_mc(struct cpuinfo_x86 *c)
Yinghai Lua860b632008-01-30 13:30:39 +0100639{
640#ifdef CONFIG_SMP
641 unsigned bits, ecx;
642
643 /* Multi core CPU? */
644 if (c->extended_cpuid_level < 0x80000008)
645 return;
646
647 ecx = cpuid_ecx(0x80000008);
648
649 c->x86_max_cores = (ecx & 0xff) + 1;
650
651 /* CPU telling us the core id bits shift? */
652 bits = (ecx >> 12) & 0xF;
653
654 /* Otherwise recompute */
655 if (bits == 0) {
656 while ((1 << bits) < c->x86_max_cores)
657 bits++;
658 }
659
660 c->x86_coreid_bits = bits;
661
662#endif
663}
664
Thomas Gleixnerfb79d222007-10-12 23:04:07 +0200665#define ENABLE_C1E_MASK 0x18000000
666#define CPUID_PROCESSOR_SIGNATURE 1
667#define CPUID_XFAM 0x0ff00000
668#define CPUID_XFAM_K8 0x00000000
669#define CPUID_XFAM_10H 0x00100000
670#define CPUID_XFAM_11H 0x00200000
671#define CPUID_XMOD 0x000f0000
672#define CPUID_XMOD_REV_F 0x00040000
673
674/* AMD systems with C1E don't have a working lAPIC timer. Check for that. */
675static __cpuinit int amd_apic_timer_broken(void)
676{
Thomas Gleixner04e1ba82008-01-30 13:30:39 +0100677 u32 lo, hi, eax = cpuid_eax(CPUID_PROCESSOR_SIGNATURE);
678
Thomas Gleixnerfb79d222007-10-12 23:04:07 +0200679 switch (eax & CPUID_XFAM) {
680 case CPUID_XFAM_K8:
681 if ((eax & CPUID_XMOD) < CPUID_XMOD_REV_F)
682 break;
683 case CPUID_XFAM_10H:
684 case CPUID_XFAM_11H:
685 rdmsr(MSR_K8_ENABLE_C1E, lo, hi);
686 if (lo & ENABLE_C1E_MASK)
687 return 1;
688 break;
689 default:
690 /* err on the side of caution */
691 return 1;
692 }
693 return 0;
694}
695
Andi Kleen2b16a232008-01-30 13:32:40 +0100696static void __cpuinit early_init_amd(struct cpuinfo_x86 *c)
697{
698 early_init_amd_mc(c);
699
700 /* c->x86_power is 8000_0007 edx. Bit 8 is constant TSC */
701 if (c->x86_power & (1<<8))
702 set_cpu_cap(c, X86_FEATURE_CONSTANT_TSC);
703}
704
Magnus Dammed775042006-09-26 10:52:36 +0200705static void __cpuinit init_amd(struct cpuinfo_x86 *c)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700706{
Andi Kleen7bcd3f32006-02-03 21:51:02 +0100707 unsigned level;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700708
Linus Torvaldsbc5e8fd2005-09-17 15:41:04 -0700709#ifdef CONFIG_SMP
710 unsigned long value;
711
Andi Kleen7d318d72005-09-29 22:05:55 +0200712 /*
713 * Disable TLB flush filter by setting HWCR.FFDIS on K8
714 * bit 6 of msr C001_0015
Thomas Gleixner04e1ba82008-01-30 13:30:39 +0100715 *
Andi Kleen7d318d72005-09-29 22:05:55 +0200716 * Errata 63 for SH-B3 steppings
717 * Errata 122 for all steppings (F+ have it disabled by default)
718 */
719 if (c->x86 == 15) {
720 rdmsrl(MSR_K8_HWCR, value);
721 value |= 1 << 6;
722 wrmsrl(MSR_K8_HWCR, value);
723 }
Linus Torvaldsbc5e8fd2005-09-17 15:41:04 -0700724#endif
725
Linus Torvalds1da177e2005-04-16 15:20:36 -0700726 /* Bit 31 in normal CPUID used for nonstandard 3DNow ID;
727 3DNow is IDd by bit 31 in extended CPUID (1*32+31) anyway */
Ingo Molnar97169512008-02-26 08:54:01 +0100728 clear_cpu_cap(c, 0*32+31);
Thomas Gleixner04e1ba82008-01-30 13:30:39 +0100729
Andi Kleen7bcd3f32006-02-03 21:51:02 +0100730 /* On C+ stepping K8 rep microcode works well for copy/memset */
731 level = cpuid_eax(1);
Thomas Gleixner04e1ba82008-01-30 13:30:39 +0100732 if (c->x86 == 15 && ((level >= 0x0f48 && level < 0x0f50) ||
733 level >= 0x0f58))
Jeremy Fitzhardinge53756d32008-01-30 13:30:55 +0100734 set_cpu_cap(c, X86_FEATURE_REP_GOOD);
Andi Kleen99741fa2007-10-17 18:04:41 +0200735 if (c->x86 == 0x10 || c->x86 == 0x11)
Jeremy Fitzhardinge53756d32008-01-30 13:30:55 +0100736 set_cpu_cap(c, X86_FEATURE_REP_GOOD);
Andi Kleen7bcd3f32006-02-03 21:51:02 +0100737
Andi Kleen18bd0572006-04-20 02:36:45 +0200738 /* Enable workaround for FXSAVE leak */
739 if (c->x86 >= 6)
Jeremy Fitzhardinge53756d32008-01-30 13:30:55 +0100740 set_cpu_cap(c, X86_FEATURE_FXSAVE_LEAK);
Andi Kleen18bd0572006-04-20 02:36:45 +0200741
Rohit Sethe42f9432006-06-26 13:59:14 +0200742 level = get_model_name(c);
743 if (!level) {
Thomas Gleixner04e1ba82008-01-30 13:30:39 +0100744 switch (c->x86) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700745 case 15:
746 /* Should distinguish Models here, but this is only
747 a fallback anyways. */
748 strcpy(c->x86_model_id, "Hammer");
Thomas Gleixner04e1ba82008-01-30 13:30:39 +0100749 break;
750 }
751 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700752 display_cacheinfo(c);
753
Andi Kleenfaee9a52006-06-26 13:56:10 +0200754 /* Multi core CPU? */
755 if (c->extended_cpuid_level >= 0x80000008)
Andi Kleen63518642005-04-16 15:25:16 -0700756 amd_detect_cmp(c);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700757
Andi Kleen67cddd92007-07-21 17:10:03 +0200758 if (c->extended_cpuid_level >= 0x80000006 &&
759 (cpuid_edx(0x80000006) & 0xf000))
760 num_cache_leaves = 4;
761 else
762 num_cache_leaves = 3;
Andi Kleen20493362006-09-26 10:52:41 +0200763
Andi Kleen0bd8acd2007-07-22 11:12:34 +0200764 if (c->x86 == 0xf || c->x86 == 0x10 || c->x86 == 0x11)
Jeremy Fitzhardinge53756d32008-01-30 13:30:55 +0100765 set_cpu_cap(c, X86_FEATURE_K8);
Andi Kleen0bd8acd2007-07-22 11:12:34 +0200766
Andi Kleende421862008-01-30 13:32:37 +0100767 /* MFENCE stops RDTSC speculation */
768 set_cpu_cap(c, X86_FEATURE_MFENCE_RDTSC);
Andi Kleenf039b752007-05-02 19:27:12 +0200769
Thomas Gleixnerfb79d222007-10-12 23:04:07 +0200770 if (amd_apic_timer_broken())
771 disable_apic_timer = 1;
Andi Kleen8346ea12008-03-12 03:53:32 +0100772
773 if (c == &boot_cpu_data && c->x86 >= 0xf && c->x86 <= 0x11) {
774 unsigned long long tseg;
775
776 /*
777 * Split up direct mapping around the TSEG SMM area.
778 * Don't do it for gbpages because there seems very little
779 * benefit in doing so.
780 */
781 if (!rdmsrl_safe(MSR_K8_TSEG_ADDR, &tseg) &&
782 (tseg >> PMD_SHIFT) < (max_pfn_mapped >> (PMD_SHIFT-PAGE_SHIFT)))
783 set_memory_4k((unsigned long)__va(tseg), 1);
784 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700785}
786
Glauber de Oliveira Costa1a539052008-01-30 13:31:39 +0100787void __cpuinit detect_ht(struct cpuinfo_x86 *c)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700788{
789#ifdef CONFIG_SMP
Thomas Gleixner04e1ba82008-01-30 13:30:39 +0100790 u32 eax, ebx, ecx, edx;
791 int index_msb, core_bits;
Siddha, Suresh B94605ef2005-11-05 17:25:54 +0100792
793 cpuid(1, &eax, &ebx, &ecx, &edx);
794
Siddha, Suresh B94605ef2005-11-05 17:25:54 +0100795
Rohit Sethe42f9432006-06-26 13:59:14 +0200796 if (!cpu_has(c, X86_FEATURE_HT))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700797 return;
Thomas Gleixner04e1ba82008-01-30 13:30:39 +0100798 if (cpu_has(c, X86_FEATURE_CMP_LEGACY))
Rohit Sethe42f9432006-06-26 13:59:14 +0200799 goto out;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700800
Linus Torvalds1da177e2005-04-16 15:20:36 -0700801 smp_num_siblings = (ebx & 0xff0000) >> 16;
Siddha, Suresh B94605ef2005-11-05 17:25:54 +0100802
Linus Torvalds1da177e2005-04-16 15:20:36 -0700803 if (smp_num_siblings == 1) {
804 printk(KERN_INFO "CPU: Hyper-Threading is disabled\n");
Thomas Gleixner04e1ba82008-01-30 13:30:39 +0100805 } else if (smp_num_siblings > 1) {
Siddha, Suresh B94605ef2005-11-05 17:25:54 +0100806
Linus Torvalds1da177e2005-04-16 15:20:36 -0700807 if (smp_num_siblings > NR_CPUS) {
Thomas Gleixner04e1ba82008-01-30 13:30:39 +0100808 printk(KERN_WARNING "CPU: Unsupported number of "
809 "siblings %d", smp_num_siblings);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700810 smp_num_siblings = 1;
811 return;
812 }
Siddha, Suresh B94605ef2005-11-05 17:25:54 +0100813
814 index_msb = get_count_order(smp_num_siblings);
Rohit Sethf3fa8eb2006-06-26 13:58:17 +0200815 c->phys_proc_id = phys_pkg_id(index_msb);
Andi Kleen3dd9d512005-04-16 15:25:15 -0700816
Siddha, Suresh B94605ef2005-11-05 17:25:54 +0100817 smp_num_siblings = smp_num_siblings / c->x86_max_cores;
Andi Kleen3dd9d512005-04-16 15:25:15 -0700818
Thomas Gleixner04e1ba82008-01-30 13:30:39 +0100819 index_msb = get_count_order(smp_num_siblings);
Andi Kleen3dd9d512005-04-16 15:25:15 -0700820
Siddha, Suresh B94605ef2005-11-05 17:25:54 +0100821 core_bits = get_count_order(c->x86_max_cores);
Andi Kleen3dd9d512005-04-16 15:25:15 -0700822
Rohit Sethf3fa8eb2006-06-26 13:58:17 +0200823 c->cpu_core_id = phys_pkg_id(index_msb) &
Siddha, Suresh B94605ef2005-11-05 17:25:54 +0100824 ((1 << core_bits) - 1);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700825 }
Rohit Sethe42f9432006-06-26 13:59:14 +0200826out:
827 if ((c->x86_max_cores * smp_num_siblings) > 1) {
Thomas Gleixner04e1ba82008-01-30 13:30:39 +0100828 printk(KERN_INFO "CPU: Physical Processor ID: %d\n",
829 c->phys_proc_id);
830 printk(KERN_INFO "CPU: Processor Core ID: %d\n",
831 c->cpu_core_id);
Rohit Sethe42f9432006-06-26 13:59:14 +0200832 }
833
Linus Torvalds1da177e2005-04-16 15:20:36 -0700834#endif
835}
836
Andi Kleen3dd9d512005-04-16 15:25:15 -0700837/*
838 * find out the number of processor cores on the die
839 */
Ashok Raje6982c62005-06-25 14:54:58 -0700840static int __cpuinit intel_num_cpu_cores(struct cpuinfo_x86 *c)
Andi Kleen3dd9d512005-04-16 15:25:15 -0700841{
Rohit Seth2bbc4192006-06-26 13:58:02 +0200842 unsigned int eax, t;
Andi Kleen3dd9d512005-04-16 15:25:15 -0700843
844 if (c->cpuid_level < 4)
845 return 1;
846
Rohit Seth2bbc4192006-06-26 13:58:02 +0200847 cpuid_count(4, 0, &eax, &t, &t, &t);
Andi Kleen3dd9d512005-04-16 15:25:15 -0700848
849 if (eax & 0x1f)
850 return ((eax >> 26) + 1);
851 else
852 return 1;
853}
854
Sam Ravnborg04d733b2008-02-17 13:22:47 +0100855static void __cpuinit srat_detect_node(void)
Andi Kleendf0cc262005-09-12 18:49:24 +0200856{
857#ifdef CONFIG_NUMA
Ravikiran G Thirumalaiddea7be2005-10-03 10:36:28 -0700858 unsigned node;
Andi Kleendf0cc262005-09-12 18:49:24 +0200859 int cpu = smp_processor_id();
Rohit Sethe42f9432006-06-26 13:59:14 +0200860 int apicid = hard_smp_processor_id();
Andi Kleendf0cc262005-09-12 18:49:24 +0200861
862 /* Don't do the funky fallback heuristics the AMD version employs
863 for now. */
Rohit Sethe42f9432006-06-26 13:59:14 +0200864 node = apicid_to_node[apicid];
Yinghai Lu475613b2008-02-24 23:23:09 -0800865 if (node == NUMA_NO_NODE || !node_online(node))
Daniel Yeisley0d015322006-05-30 22:47:57 +0200866 node = first_node(node_online_map);
Andi Kleen69d81fc2005-11-05 17:25:53 +0100867 numa_set_node(cpu, node);
Andi Kleendf0cc262005-09-12 18:49:24 +0200868
Andi Kleenc31fbb12006-09-26 10:52:33 +0200869 printk(KERN_INFO "CPU %d/%x -> Node %d\n", cpu, apicid, node);
Andi Kleendf0cc262005-09-12 18:49:24 +0200870#endif
871}
872
Andi Kleen2b16a232008-01-30 13:32:40 +0100873static void __cpuinit early_init_intel(struct cpuinfo_x86 *c)
874{
875 if ((c->x86 == 0xf && c->x86_model >= 0x03) ||
876 (c->x86 == 0x6 && c->x86_model >= 0x0e))
Ingo Molnar97169512008-02-26 08:54:01 +0100877 set_cpu_cap(c, X86_FEATURE_CONSTANT_TSC);
Andi Kleen2b16a232008-01-30 13:32:40 +0100878}
879
Ashok Raje6982c62005-06-25 14:54:58 -0700880static void __cpuinit init_intel(struct cpuinfo_x86 *c)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700881{
882 /* Cache sizes */
883 unsigned n;
884
885 init_intel_cacheinfo(c);
Thomas Gleixner04e1ba82008-01-30 13:30:39 +0100886 if (c->cpuid_level > 9) {
Venkatesh Pallipadi0080e662006-06-26 13:59:59 +0200887 unsigned eax = cpuid_eax(10);
888 /* Check for version and the number of counters */
889 if ((eax & 0xff) && (((eax>>8) & 0xff) > 1))
Jeremy Fitzhardinge53756d32008-01-30 13:30:55 +0100890 set_cpu_cap(c, X86_FEATURE_ARCH_PERFMON);
Venkatesh Pallipadi0080e662006-06-26 13:59:59 +0200891 }
892
Stephane Eranian36b2a8d2006-12-07 02:14:01 +0100893 if (cpu_has_ds) {
894 unsigned int l1, l2;
895 rdmsr(MSR_IA32_MISC_ENABLE, l1, l2);
Stephane Eranianee58fad2006-12-07 02:14:11 +0100896 if (!(l1 & (1<<11)))
Jeremy Fitzhardinge53756d32008-01-30 13:30:55 +0100897 set_cpu_cap(c, X86_FEATURE_BTS);
Stephane Eranian36b2a8d2006-12-07 02:14:01 +0100898 if (!(l1 & (1<<12)))
Jeremy Fitzhardinge53756d32008-01-30 13:30:55 +0100899 set_cpu_cap(c, X86_FEATURE_PEBS);
Stephane Eranian36b2a8d2006-12-07 02:14:01 +0100900 }
901
Markus Metzgereee3af42008-01-30 13:31:09 +0100902
903 if (cpu_has_bts)
904 ds_init_intel(c);
905
Andi Kleenebfcaa92005-04-16 15:25:18 -0700906 n = c->extended_cpuid_level;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700907 if (n >= 0x80000008) {
908 unsigned eax = cpuid_eax(0x80000008);
909 c->x86_virt_bits = (eax >> 8) & 0xff;
910 c->x86_phys_bits = eax & 0xff;
Shaohua Liaf9c1422005-11-05 17:25:54 +0100911 /* CPUID workaround for Intel 0F34 CPU */
912 if (c->x86_vendor == X86_VENDOR_INTEL &&
913 c->x86 == 0xF && c->x86_model == 0x3 &&
914 c->x86_mask == 0x4)
915 c->x86_phys_bits = 36;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700916 }
917
918 if (c->x86 == 15)
919 c->x86_cache_alignment = c->x86_clflush_size * 2;
Andi Kleen27fbe5b2006-09-26 10:52:41 +0200920 if (c->x86 == 6)
Jeremy Fitzhardinge53756d32008-01-30 13:30:55 +0100921 set_cpu_cap(c, X86_FEATURE_REP_GOOD);
Andi Kleen707fa8e2008-01-30 13:32:37 +0100922 set_cpu_cap(c, X86_FEATURE_LFENCE_RDTSC);
Thomas Gleixner04e1ba82008-01-30 13:30:39 +0100923 c->x86_max_cores = intel_num_cpu_cores(c);
Andi Kleendf0cc262005-09-12 18:49:24 +0200924
925 srat_detect_node();
Linus Torvalds1da177e2005-04-16 15:20:36 -0700926}
927
Dave Jones0e03eb82008-03-26 12:09:16 -0400928static void __cpuinit early_init_centaur(struct cpuinfo_x86 *c)
929{
930 if (c->x86 == 0x6 && c->x86_model >= 0xf)
931 set_bit(X86_FEATURE_CONSTANT_TSC, &c->x86_capability);
932}
933
934static void __cpuinit init_centaur(struct cpuinfo_x86 *c)
935{
936 /* Cache sizes */
937 unsigned n;
938
939 n = c->extended_cpuid_level;
940 if (n >= 0x80000008) {
941 unsigned eax = cpuid_eax(0x80000008);
942 c->x86_virt_bits = (eax >> 8) & 0xff;
943 c->x86_phys_bits = eax & 0xff;
944 }
945
946 if (c->x86 == 0x6 && c->x86_model >= 0xf) {
947 c->x86_cache_alignment = c->x86_clflush_size * 2;
948 set_cpu_cap(c, X86_FEATURE_CONSTANT_TSC);
949 set_cpu_cap(c, X86_FEATURE_REP_GOOD);
950 }
951 set_cpu_cap(c, X86_FEATURE_LFENCE_RDTSC);
952}
953
Adrian Bunk672289e2005-09-10 00:27:21 -0700954static void __cpuinit get_cpu_vendor(struct cpuinfo_x86 *c)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700955{
956 char *v = c->x86_vendor_id;
957
958 if (!strcmp(v, "AuthenticAMD"))
959 c->x86_vendor = X86_VENDOR_AMD;
960 else if (!strcmp(v, "GenuineIntel"))
961 c->x86_vendor = X86_VENDOR_INTEL;
Dave Jones0e03eb82008-03-26 12:09:16 -0400962 else if (!strcmp(v, "CentaurHauls"))
963 c->x86_vendor = X86_VENDOR_CENTAUR;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700964 else
965 c->x86_vendor = X86_VENDOR_UNKNOWN;
966}
967
Linus Torvalds1da177e2005-04-16 15:20:36 -0700968/* Do some early cpuid on the boot CPU to get some parameter that are
969 needed before check_bugs. Everything advanced is in identify_cpu
970 below. */
Thomas Gleixner8c61b902008-01-30 13:30:16 +0100971static void __cpuinit early_identify_cpu(struct cpuinfo_x86 *c)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700972{
Yinghai Lua860b632008-01-30 13:30:39 +0100973 u32 tfms, xlvl;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700974
975 c->loops_per_jiffy = loops_per_jiffy;
976 c->x86_cache_size = -1;
977 c->x86_vendor = X86_VENDOR_UNKNOWN;
978 c->x86_model = c->x86_mask = 0; /* So far unknown... */
979 c->x86_vendor_id[0] = '\0'; /* Unset */
980 c->x86_model_id[0] = '\0'; /* Unset */
981 c->x86_clflush_size = 64;
982 c->x86_cache_alignment = c->x86_clflush_size;
Siddha, Suresh B94605ef2005-11-05 17:25:54 +0100983 c->x86_max_cores = 1;
Yinghai Lua860b632008-01-30 13:30:39 +0100984 c->x86_coreid_bits = 0;
Andi Kleenebfcaa92005-04-16 15:25:18 -0700985 c->extended_cpuid_level = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700986 memset(&c->x86_capability, 0, sizeof c->x86_capability);
987
988 /* Get vendor name */
989 cpuid(0x00000000, (unsigned int *)&c->cpuid_level,
990 (unsigned int *)&c->x86_vendor_id[0],
991 (unsigned int *)&c->x86_vendor_id[8],
992 (unsigned int *)&c->x86_vendor_id[4]);
Thomas Gleixner04e1ba82008-01-30 13:30:39 +0100993
Linus Torvalds1da177e2005-04-16 15:20:36 -0700994 get_cpu_vendor(c);
995
996 /* Initialize the standard set of capabilities */
997 /* Note that the vendor-specific code below might override */
998
999 /* Intel-defined flags: level 0x00000001 */
1000 if (c->cpuid_level >= 0x00000001) {
1001 __u32 misc;
1002 cpuid(0x00000001, &tfms, &misc, &c->x86_capability[4],
1003 &c->x86_capability[0]);
1004 c->x86 = (tfms >> 8) & 0xf;
1005 c->x86_model = (tfms >> 4) & 0xf;
1006 c->x86_mask = tfms & 0xf;
Suresh Siddhaf5f786d2005-11-05 17:25:53 +01001007 if (c->x86 == 0xf)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001008 c->x86 += (tfms >> 20) & 0xff;
Suresh Siddhaf5f786d2005-11-05 17:25:53 +01001009 if (c->x86 >= 0x6)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001010 c->x86_model += ((tfms >> 16) & 0xF) << 4;
Ingo Molnar97169512008-02-26 08:54:01 +01001011 if (test_cpu_cap(c, X86_FEATURE_CLFLSH))
Linus Torvalds1da177e2005-04-16 15:20:36 -07001012 c->x86_clflush_size = ((misc >> 8) & 0xff) * 8;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001013 } else {
1014 /* Have CPUID level 0 only - unheard of */
1015 c->x86 = 4;
1016 }
Andi Kleena1586082005-05-16 21:53:21 -07001017
Yinghai Lu01aaea12008-03-06 13:46:39 -08001018 c->initial_apicid = (cpuid_ebx(1) >> 24) & 0xff;
Andi Kleena1586082005-05-16 21:53:21 -07001019#ifdef CONFIG_SMP
Yinghai Lu01aaea12008-03-06 13:46:39 -08001020 c->phys_proc_id = c->initial_apicid;
Andi Kleena1586082005-05-16 21:53:21 -07001021#endif
Linus Torvalds1da177e2005-04-16 15:20:36 -07001022 /* AMD-defined flags: level 0x80000001 */
1023 xlvl = cpuid_eax(0x80000000);
Andi Kleenebfcaa92005-04-16 15:25:18 -07001024 c->extended_cpuid_level = xlvl;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001025 if ((xlvl & 0xffff0000) == 0x80000000) {
1026 if (xlvl >= 0x80000001) {
1027 c->x86_capability[1] = cpuid_edx(0x80000001);
H. Peter Anvin5b7abc62005-05-01 08:58:49 -07001028 c->x86_capability[6] = cpuid_ecx(0x80000001);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001029 }
1030 if (xlvl >= 0x80000004)
1031 get_model_name(c); /* Default name */
1032 }
1033
1034 /* Transmeta-defined flags: level 0x80860001 */
1035 xlvl = cpuid_eax(0x80860000);
1036 if ((xlvl & 0xffff0000) == 0x80860000) {
1037 /* Don't set x86_cpuid_level here for now to not confuse. */
1038 if (xlvl >= 0x80860001)
1039 c->x86_capability[2] = cpuid_edx(0x80860001);
1040 }
1041
Andreas Herrmann9566e912008-01-30 13:32:41 +01001042 c->extended_cpuid_level = cpuid_eax(0x80000000);
1043 if (c->extended_cpuid_level >= 0x80000007)
1044 c->x86_power = cpuid_edx(0x80000007);
1045
Yinghai Lu9307cac2008-03-24 23:24:34 -07001046
1047 clear_cpu_cap(c, X86_FEATURE_PAT);
1048
Yinghai Lua860b632008-01-30 13:30:39 +01001049 switch (c->x86_vendor) {
1050 case X86_VENDOR_AMD:
1051 early_init_amd(c);
Yinghai Lu9307cac2008-03-24 23:24:34 -07001052 if (c->x86 >= 0xf && c->x86 <= 0x11)
1053 set_cpu_cap(c, X86_FEATURE_PAT);
Yinghai Lua860b632008-01-30 13:30:39 +01001054 break;
Yinghai Lu71617bf2008-01-30 13:33:18 +01001055 case X86_VENDOR_INTEL:
1056 early_init_intel(c);
Yinghai Lu9307cac2008-03-24 23:24:34 -07001057 if (c->x86 == 0xF || (c->x86 == 6 && c->x86_model >= 15))
1058 set_cpu_cap(c, X86_FEATURE_PAT);
Yinghai Lu71617bf2008-01-30 13:33:18 +01001059 break;
Dave Jones0e03eb82008-03-26 12:09:16 -04001060 case X86_VENDOR_CENTAUR:
1061 early_init_centaur(c);
1062 break;
Yinghai Lua860b632008-01-30 13:30:39 +01001063 }
1064
1065}
1066
1067/*
1068 * This does the hard work of actually picking apart the CPU stuff...
1069 */
1070void __cpuinit identify_cpu(struct cpuinfo_x86 *c)
1071{
1072 int i;
1073
1074 early_identify_cpu(c);
1075
Venki Pallipadi1d679532007-07-11 12:18:32 -07001076 init_scattered_cpuid_features(c);
1077
Siddha, Suresh B1e9f28f2006-03-27 01:15:22 -08001078 c->apicid = phys_pkg_id(0);
1079
Linus Torvalds1da177e2005-04-16 15:20:36 -07001080 /*
1081 * Vendor-specific initialization. In this section we
1082 * canonicalize the feature flags, meaning if there are
1083 * features a certain CPU supports which CPUID doesn't
1084 * tell us, CPUID claiming incorrect flags, or other bugs,
1085 * we handle them here.
1086 *
1087 * At the end of this section, c->x86_capability better
1088 * indicate the features this CPU genuinely supports!
1089 */
1090 switch (c->x86_vendor) {
1091 case X86_VENDOR_AMD:
1092 init_amd(c);
1093 break;
1094
1095 case X86_VENDOR_INTEL:
1096 init_intel(c);
1097 break;
1098
Dave Jones0e03eb82008-03-26 12:09:16 -04001099 case X86_VENDOR_CENTAUR:
1100 init_centaur(c);
1101 break;
1102
Linus Torvalds1da177e2005-04-16 15:20:36 -07001103 case X86_VENDOR_UNKNOWN:
1104 default:
1105 display_cacheinfo(c);
1106 break;
1107 }
1108
Thomas Gleixner04e1ba82008-01-30 13:30:39 +01001109 detect_ht(c);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001110
1111 /*
1112 * On SMP, boot_cpu_data holds the common feature set between
1113 * all CPUs; so make sure that we indicate which features are
1114 * common between the CPUs. The first time this routine gets
1115 * executed, c == &boot_cpu_data.
1116 */
1117 if (c != &boot_cpu_data) {
1118 /* AND the already accumulated flags with these */
Thomas Gleixner04e1ba82008-01-30 13:30:39 +01001119 for (i = 0; i < NCAPINTS; i++)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001120 boot_cpu_data.x86_capability[i] &= c->x86_capability[i];
1121 }
1122
Andi Kleen7d851c82008-01-30 13:33:20 +01001123 /* Clear all flags overriden by options */
1124 for (i = 0; i < NCAPINTS; i++)
Mikael Pettersson12c247a2008-02-24 18:27:03 +01001125 c->x86_capability[i] &= ~cleared_cpu_caps[i];
Andi Kleen7d851c82008-01-30 13:33:20 +01001126
Linus Torvalds1da177e2005-04-16 15:20:36 -07001127#ifdef CONFIG_X86_MCE
1128 mcheck_init(c);
1129#endif
Hiroshi Shimamoto74ff3052008-01-30 13:33:18 +01001130 select_idle_routine(c);
1131
Linus Torvalds1da177e2005-04-16 15:20:36 -07001132#ifdef CONFIG_NUMA
Andi Kleen3019e8e2005-07-28 21:15:28 -07001133 numa_add_cpu(smp_processor_id());
Linus Torvalds1da177e2005-04-16 15:20:36 -07001134#endif
Andi Kleen2b16a232008-01-30 13:32:40 +01001135
Linus Torvalds1da177e2005-04-16 15:20:36 -07001136}
Linus Torvalds1da177e2005-04-16 15:20:36 -07001137
Glauber de Oliveira Costa7a636af2008-03-19 14:25:02 -03001138void __cpuinit identify_boot_cpu(void)
1139{
1140 identify_cpu(&boot_cpu_data);
1141}
1142
1143void __cpuinit identify_secondary_cpu(struct cpuinfo_x86 *c)
1144{
1145 BUG_ON(c == &boot_cpu_data);
1146 identify_cpu(c);
1147 mtrr_ap_init();
1148}
1149
Andi Kleen191679f2008-01-30 13:33:21 +01001150static __init int setup_noclflush(char *arg)
1151{
1152 setup_clear_cpu_cap(X86_FEATURE_CLFLSH);
1153 return 1;
1154}
1155__setup("noclflush", setup_noclflush);
1156
Ashok Raje6982c62005-06-25 14:54:58 -07001157void __cpuinit print_cpu_info(struct cpuinfo_x86 *c)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001158{
1159 if (c->x86_model_id[0])
Marcin Slusarzd8ff0bb2008-02-01 21:31:51 +01001160 printk(KERN_CONT "%s", c->x86_model_id);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001161
Thomas Gleixner04e1ba82008-01-30 13:30:39 +01001162 if (c->x86_mask || c->cpuid_level >= 0)
1163 printk(KERN_CONT " stepping %02x\n", c->x86_mask);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001164 else
Thomas Gleixner04e1ba82008-01-30 13:30:39 +01001165 printk(KERN_CONT "\n");
Linus Torvalds1da177e2005-04-16 15:20:36 -07001166}
1167
Andi Kleenac72e782008-01-30 13:33:21 +01001168static __init int setup_disablecpuid(char *arg)
1169{
1170 int bit;
1171 if (get_option(&arg, &bit) && bit < NCAPINTS*32)
1172 setup_clear_cpu_cap(bit);
1173 else
1174 return 0;
1175 return 1;
1176}
1177__setup("clearcpuid=", setup_disablecpuid);