Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1 | /* |
| 2 | * linux/arch/x86-64/kernel/setup.c |
| 3 | * |
| 4 | * Copyright (C) 1995 Linus Torvalds |
| 5 | * |
| 6 | * Nov 2001 Dave Jones <davej@suse.de> |
| 7 | * Forked from i386 setup code. |
| 8 | * |
| 9 | * $Id$ |
| 10 | */ |
| 11 | |
| 12 | /* |
| 13 | * This file handles the architecture-dependent parts of initialization |
| 14 | */ |
| 15 | |
| 16 | #include <linux/errno.h> |
| 17 | #include <linux/sched.h> |
| 18 | #include <linux/kernel.h> |
| 19 | #include <linux/mm.h> |
| 20 | #include <linux/stddef.h> |
| 21 | #include <linux/unistd.h> |
| 22 | #include <linux/ptrace.h> |
| 23 | #include <linux/slab.h> |
| 24 | #include <linux/user.h> |
| 25 | #include <linux/a.out.h> |
| 26 | #include <linux/tty.h> |
| 27 | #include <linux/ioport.h> |
| 28 | #include <linux/delay.h> |
| 29 | #include <linux/config.h> |
| 30 | #include <linux/init.h> |
| 31 | #include <linux/initrd.h> |
| 32 | #include <linux/highmem.h> |
| 33 | #include <linux/bootmem.h> |
| 34 | #include <linux/module.h> |
| 35 | #include <asm/processor.h> |
| 36 | #include <linux/console.h> |
| 37 | #include <linux/seq_file.h> |
Vivek Goyal | aac04b3 | 2006-01-09 20:51:47 -0800 | [diff] [blame] | 38 | #include <linux/crash_dump.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 39 | #include <linux/root_dev.h> |
| 40 | #include <linux/pci.h> |
| 41 | #include <linux/acpi.h> |
| 42 | #include <linux/kallsyms.h> |
| 43 | #include <linux/edd.h> |
Matt Tolentino | bbfceef | 2005-06-23 00:08:07 -0700 | [diff] [blame] | 44 | #include <linux/mmzone.h> |
Eric W. Biederman | 5f5609d | 2005-06-25 14:58:04 -0700 | [diff] [blame] | 45 | #include <linux/kexec.h> |
Venkatesh Pallipadi | 95235ca | 2005-12-02 10:43:20 -0800 | [diff] [blame] | 46 | #include <linux/cpufreq.h> |
Andi Kleen | e992867 | 2006-01-11 22:43:33 +0100 | [diff] [blame] | 47 | #include <linux/dmi.h> |
Muli Ben-Yehuda | 17a941d | 2006-01-11 22:44:42 +0100 | [diff] [blame] | 48 | #include <linux/dma-mapping.h> |
Andi Kleen | 681558f | 2006-03-25 16:29:46 +0100 | [diff] [blame] | 49 | #include <linux/ctype.h> |
Matt Tolentino | bbfceef | 2005-06-23 00:08:07 -0700 | [diff] [blame] | 50 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 51 | #include <asm/mtrr.h> |
| 52 | #include <asm/uaccess.h> |
| 53 | #include <asm/system.h> |
| 54 | #include <asm/io.h> |
| 55 | #include <asm/smp.h> |
| 56 | #include <asm/msr.h> |
| 57 | #include <asm/desc.h> |
| 58 | #include <video/edid.h> |
| 59 | #include <asm/e820.h> |
| 60 | #include <asm/dma.h> |
| 61 | #include <asm/mpspec.h> |
| 62 | #include <asm/mmu_context.h> |
| 63 | #include <asm/bootsetup.h> |
| 64 | #include <asm/proto.h> |
| 65 | #include <asm/setup.h> |
| 66 | #include <asm/mach_apic.h> |
| 67 | #include <asm/numa.h> |
Muli Ben-Yehuda | 17a941d | 2006-01-11 22:44:42 +0100 | [diff] [blame] | 68 | #include <asm/swiotlb.h> |
Andi Kleen | 2bc0414 | 2005-11-05 17:25:53 +0100 | [diff] [blame] | 69 | #include <asm/sections.h> |
Muli Ben-Yehuda | 17a941d | 2006-01-11 22:44:42 +0100 | [diff] [blame] | 70 | #include <asm/gart-mapping.h> |
Andi Kleen | f2d3efe | 2006-03-25 16:30:22 +0100 | [diff] [blame] | 71 | #include <asm/dmi.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 72 | |
| 73 | /* |
| 74 | * Machine setup.. |
| 75 | */ |
| 76 | |
Ravikiran G Thirumalai | 6c231b7 | 2005-09-06 15:17:45 -0700 | [diff] [blame] | 77 | struct cpuinfo_x86 boot_cpu_data __read_mostly; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 78 | |
| 79 | unsigned long mmu_cr4_features; |
| 80 | |
| 81 | int acpi_disabled; |
| 82 | EXPORT_SYMBOL(acpi_disabled); |
Len Brown | 888ba6c | 2005-08-24 12:07:20 -0400 | [diff] [blame] | 83 | #ifdef CONFIG_ACPI |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 84 | extern int __initdata acpi_ht; |
| 85 | extern acpi_interrupt_flags acpi_sci_flags; |
| 86 | int __initdata acpi_force = 0; |
| 87 | #endif |
| 88 | |
| 89 | int acpi_numa __initdata; |
| 90 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 91 | /* Boot loader ID as an integer, for the benefit of proc_dointvec */ |
| 92 | int bootloader_type; |
| 93 | |
| 94 | unsigned long saved_video_mode; |
| 95 | |
Andi Kleen | f2d3efe | 2006-03-25 16:30:22 +0100 | [diff] [blame] | 96 | /* |
| 97 | * Early DMI memory |
| 98 | */ |
| 99 | int dmi_alloc_index; |
| 100 | char dmi_alloc_data[DMI_MAX_DATA]; |
| 101 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 102 | /* |
| 103 | * Setup options |
| 104 | */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 105 | struct screen_info screen_info; |
| 106 | struct sys_desc_table_struct { |
| 107 | unsigned short length; |
| 108 | unsigned char table[0]; |
| 109 | }; |
| 110 | |
| 111 | struct edid_info edid_info; |
| 112 | struct e820map e820; |
| 113 | |
| 114 | extern int root_mountflags; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 115 | |
| 116 | char command_line[COMMAND_LINE_SIZE]; |
| 117 | |
| 118 | struct resource standard_io_resources[] = { |
| 119 | { .name = "dma1", .start = 0x00, .end = 0x1f, |
| 120 | .flags = IORESOURCE_BUSY | IORESOURCE_IO }, |
| 121 | { .name = "pic1", .start = 0x20, .end = 0x21, |
| 122 | .flags = IORESOURCE_BUSY | IORESOURCE_IO }, |
| 123 | { .name = "timer0", .start = 0x40, .end = 0x43, |
| 124 | .flags = IORESOURCE_BUSY | IORESOURCE_IO }, |
| 125 | { .name = "timer1", .start = 0x50, .end = 0x53, |
| 126 | .flags = IORESOURCE_BUSY | IORESOURCE_IO }, |
| 127 | { .name = "keyboard", .start = 0x60, .end = 0x6f, |
| 128 | .flags = IORESOURCE_BUSY | IORESOURCE_IO }, |
| 129 | { .name = "dma page reg", .start = 0x80, .end = 0x8f, |
| 130 | .flags = IORESOURCE_BUSY | IORESOURCE_IO }, |
| 131 | { .name = "pic2", .start = 0xa0, .end = 0xa1, |
| 132 | .flags = IORESOURCE_BUSY | IORESOURCE_IO }, |
| 133 | { .name = "dma2", .start = 0xc0, .end = 0xdf, |
| 134 | .flags = IORESOURCE_BUSY | IORESOURCE_IO }, |
| 135 | { .name = "fpu", .start = 0xf0, .end = 0xff, |
| 136 | .flags = IORESOURCE_BUSY | IORESOURCE_IO } |
| 137 | }; |
| 138 | |
| 139 | #define STANDARD_IO_RESOURCES \ |
| 140 | (sizeof standard_io_resources / sizeof standard_io_resources[0]) |
| 141 | |
| 142 | #define IORESOURCE_RAM (IORESOURCE_BUSY | IORESOURCE_MEM) |
| 143 | |
| 144 | struct resource data_resource = { |
| 145 | .name = "Kernel data", |
| 146 | .start = 0, |
| 147 | .end = 0, |
| 148 | .flags = IORESOURCE_RAM, |
| 149 | }; |
| 150 | struct resource code_resource = { |
| 151 | .name = "Kernel code", |
| 152 | .start = 0, |
| 153 | .end = 0, |
| 154 | .flags = IORESOURCE_RAM, |
| 155 | }; |
| 156 | |
| 157 | #define IORESOURCE_ROM (IORESOURCE_BUSY | IORESOURCE_READONLY | IORESOURCE_MEM) |
| 158 | |
| 159 | static struct resource system_rom_resource = { |
| 160 | .name = "System ROM", |
| 161 | .start = 0xf0000, |
| 162 | .end = 0xfffff, |
| 163 | .flags = IORESOURCE_ROM, |
| 164 | }; |
| 165 | |
| 166 | static struct resource extension_rom_resource = { |
| 167 | .name = "Extension ROM", |
| 168 | .start = 0xe0000, |
| 169 | .end = 0xeffff, |
| 170 | .flags = IORESOURCE_ROM, |
| 171 | }; |
| 172 | |
| 173 | static struct resource adapter_rom_resources[] = { |
| 174 | { .name = "Adapter ROM", .start = 0xc8000, .end = 0, |
| 175 | .flags = IORESOURCE_ROM }, |
| 176 | { .name = "Adapter ROM", .start = 0, .end = 0, |
| 177 | .flags = IORESOURCE_ROM }, |
| 178 | { .name = "Adapter ROM", .start = 0, .end = 0, |
| 179 | .flags = IORESOURCE_ROM }, |
| 180 | { .name = "Adapter ROM", .start = 0, .end = 0, |
| 181 | .flags = IORESOURCE_ROM }, |
| 182 | { .name = "Adapter ROM", .start = 0, .end = 0, |
| 183 | .flags = IORESOURCE_ROM }, |
| 184 | { .name = "Adapter ROM", .start = 0, .end = 0, |
| 185 | .flags = IORESOURCE_ROM } |
| 186 | }; |
| 187 | |
| 188 | #define ADAPTER_ROM_RESOURCES \ |
| 189 | (sizeof adapter_rom_resources / sizeof adapter_rom_resources[0]) |
| 190 | |
| 191 | static struct resource video_rom_resource = { |
| 192 | .name = "Video ROM", |
| 193 | .start = 0xc0000, |
| 194 | .end = 0xc7fff, |
| 195 | .flags = IORESOURCE_ROM, |
| 196 | }; |
| 197 | |
| 198 | static struct resource video_ram_resource = { |
| 199 | .name = "Video RAM area", |
| 200 | .start = 0xa0000, |
| 201 | .end = 0xbffff, |
| 202 | .flags = IORESOURCE_RAM, |
| 203 | }; |
| 204 | |
| 205 | #define romsignature(x) (*(unsigned short *)(x) == 0xaa55) |
| 206 | |
| 207 | static int __init romchecksum(unsigned char *rom, unsigned long length) |
| 208 | { |
| 209 | unsigned char *p, sum = 0; |
| 210 | |
| 211 | for (p = rom; p < rom + length; p++) |
| 212 | sum += *p; |
| 213 | return sum == 0; |
| 214 | } |
| 215 | |
| 216 | static void __init probe_roms(void) |
| 217 | { |
| 218 | unsigned long start, length, upper; |
| 219 | unsigned char *rom; |
| 220 | int i; |
| 221 | |
| 222 | /* video rom */ |
| 223 | upper = adapter_rom_resources[0].start; |
| 224 | for (start = video_rom_resource.start; start < upper; start += 2048) { |
| 225 | rom = isa_bus_to_virt(start); |
| 226 | if (!romsignature(rom)) |
| 227 | continue; |
| 228 | |
| 229 | video_rom_resource.start = start; |
| 230 | |
| 231 | /* 0 < length <= 0x7f * 512, historically */ |
| 232 | length = rom[2] * 512; |
| 233 | |
| 234 | /* if checksum okay, trust length byte */ |
| 235 | if (length && romchecksum(rom, length)) |
| 236 | video_rom_resource.end = start + length - 1; |
| 237 | |
| 238 | request_resource(&iomem_resource, &video_rom_resource); |
| 239 | break; |
| 240 | } |
| 241 | |
| 242 | start = (video_rom_resource.end + 1 + 2047) & ~2047UL; |
| 243 | if (start < upper) |
| 244 | start = upper; |
| 245 | |
| 246 | /* system rom */ |
| 247 | request_resource(&iomem_resource, &system_rom_resource); |
| 248 | upper = system_rom_resource.start; |
| 249 | |
| 250 | /* check for extension rom (ignore length byte!) */ |
| 251 | rom = isa_bus_to_virt(extension_rom_resource.start); |
| 252 | if (romsignature(rom)) { |
| 253 | length = extension_rom_resource.end - extension_rom_resource.start + 1; |
| 254 | if (romchecksum(rom, length)) { |
| 255 | request_resource(&iomem_resource, &extension_rom_resource); |
| 256 | upper = extension_rom_resource.start; |
| 257 | } |
| 258 | } |
| 259 | |
| 260 | /* check for adapter roms on 2k boundaries */ |
| 261 | for (i = 0; i < ADAPTER_ROM_RESOURCES && start < upper; start += 2048) { |
| 262 | rom = isa_bus_to_virt(start); |
| 263 | if (!romsignature(rom)) |
| 264 | continue; |
| 265 | |
| 266 | /* 0 < length <= 0x7f * 512, historically */ |
| 267 | length = rom[2] * 512; |
| 268 | |
| 269 | /* but accept any length that fits if checksum okay */ |
| 270 | if (!length || start + length > upper || !romchecksum(rom, length)) |
| 271 | continue; |
| 272 | |
| 273 | adapter_rom_resources[i].start = start; |
| 274 | adapter_rom_resources[i].end = start + length - 1; |
| 275 | request_resource(&iomem_resource, &adapter_rom_resources[i]); |
| 276 | |
| 277 | start = adapter_rom_resources[i++].end & ~2047UL; |
| 278 | } |
| 279 | } |
| 280 | |
Andi Kleen | 681558f | 2006-03-25 16:29:46 +0100 | [diff] [blame] | 281 | /* Check for full argument with no trailing characters */ |
| 282 | static int fullarg(char *p, char *arg) |
| 283 | { |
| 284 | int l = strlen(arg); |
| 285 | return !memcmp(p, arg, l) && (p[l] == 0 || isspace(p[l])); |
| 286 | } |
| 287 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 288 | static __init void parse_cmdline_early (char ** cmdline_p) |
| 289 | { |
| 290 | char c = ' ', *to = command_line, *from = COMMAND_LINE; |
| 291 | int len = 0; |
akpm@osdl.org | 69cda7b | 2006-01-09 20:51:46 -0800 | [diff] [blame] | 292 | int userdef = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 293 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 294 | for (;;) { |
| 295 | if (c != ' ') |
| 296 | goto next_char; |
| 297 | |
| 298 | #ifdef CONFIG_SMP |
| 299 | /* |
| 300 | * If the BIOS enumerates physical processors before logical, |
| 301 | * maxcpus=N at enumeration-time can be used to disable HT. |
| 302 | */ |
| 303 | else if (!memcmp(from, "maxcpus=", 8)) { |
| 304 | extern unsigned int maxcpus; |
| 305 | |
| 306 | maxcpus = simple_strtoul(from + 8, NULL, 0); |
| 307 | } |
| 308 | #endif |
Len Brown | 888ba6c | 2005-08-24 12:07:20 -0400 | [diff] [blame] | 309 | #ifdef CONFIG_ACPI |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 310 | /* "acpi=off" disables both ACPI table parsing and interpreter init */ |
Andi Kleen | 681558f | 2006-03-25 16:29:46 +0100 | [diff] [blame] | 311 | if (fullarg(from,"acpi=off")) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 312 | disable_acpi(); |
| 313 | |
Andi Kleen | 681558f | 2006-03-25 16:29:46 +0100 | [diff] [blame] | 314 | if (fullarg(from, "acpi=force")) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 315 | /* add later when we do DMI horrors: */ |
| 316 | acpi_force = 1; |
| 317 | acpi_disabled = 0; |
| 318 | } |
| 319 | |
| 320 | /* acpi=ht just means: do ACPI MADT parsing |
| 321 | at bootup, but don't enable the full ACPI interpreter */ |
Andi Kleen | 681558f | 2006-03-25 16:29:46 +0100 | [diff] [blame] | 322 | if (fullarg(from, "acpi=ht")) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 323 | if (!acpi_force) |
| 324 | disable_acpi(); |
| 325 | acpi_ht = 1; |
| 326 | } |
Andi Kleen | 681558f | 2006-03-25 16:29:46 +0100 | [diff] [blame] | 327 | else if (fullarg(from, "pci=noacpi")) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 328 | acpi_disable_pci(); |
Andi Kleen | 681558f | 2006-03-25 16:29:46 +0100 | [diff] [blame] | 329 | else if (fullarg(from, "acpi=noirq")) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 330 | acpi_noirq_set(); |
| 331 | |
Andi Kleen | 681558f | 2006-03-25 16:29:46 +0100 | [diff] [blame] | 332 | else if (fullarg(from, "acpi_sci=edge")) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 333 | acpi_sci_flags.trigger = 1; |
Andi Kleen | 681558f | 2006-03-25 16:29:46 +0100 | [diff] [blame] | 334 | else if (fullarg(from, "acpi_sci=level")) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 335 | acpi_sci_flags.trigger = 3; |
Andi Kleen | 681558f | 2006-03-25 16:29:46 +0100 | [diff] [blame] | 336 | else if (fullarg(from, "acpi_sci=high")) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 337 | acpi_sci_flags.polarity = 1; |
Andi Kleen | 681558f | 2006-03-25 16:29:46 +0100 | [diff] [blame] | 338 | else if (fullarg(from, "acpi_sci=low")) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 339 | acpi_sci_flags.polarity = 3; |
| 340 | |
| 341 | /* acpi=strict disables out-of-spec workarounds */ |
Andi Kleen | 681558f | 2006-03-25 16:29:46 +0100 | [diff] [blame] | 342 | else if (fullarg(from, "acpi=strict")) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 343 | acpi_strict = 1; |
| 344 | } |
Andi Kleen | 2299924 | 2005-04-16 15:25:17 -0700 | [diff] [blame] | 345 | #ifdef CONFIG_X86_IO_APIC |
Andi Kleen | 681558f | 2006-03-25 16:29:46 +0100 | [diff] [blame] | 346 | else if (fullarg(from, "acpi_skip_timer_override")) |
Andi Kleen | 2299924 | 2005-04-16 15:25:17 -0700 | [diff] [blame] | 347 | acpi_skip_timer_override = 1; |
| 348 | #endif |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 349 | #endif |
| 350 | |
Andi Kleen | 681558f | 2006-03-25 16:29:46 +0100 | [diff] [blame] | 351 | if (fullarg(from, "disable_timer_pin_1")) |
Chuck Ebbert | 66759a0 | 2005-09-12 18:49:25 +0200 | [diff] [blame] | 352 | disable_timer_pin_1 = 1; |
Andi Kleen | 681558f | 2006-03-25 16:29:46 +0100 | [diff] [blame] | 353 | if (fullarg(from, "enable_timer_pin_1")) |
Chuck Ebbert | 66759a0 | 2005-09-12 18:49:25 +0200 | [diff] [blame] | 354 | disable_timer_pin_1 = -1; |
| 355 | |
Andi Kleen | 681558f | 2006-03-25 16:29:46 +0100 | [diff] [blame] | 356 | if (fullarg(from, "nolapic") || fullarg(from, "disableapic")) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 357 | disable_apic = 1; |
| 358 | |
Andi Kleen | 681558f | 2006-03-25 16:29:46 +0100 | [diff] [blame] | 359 | if (fullarg(from, "noapic")) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 360 | skip_ioapic_setup = 1; |
| 361 | |
Andi Kleen | 681558f | 2006-03-25 16:29:46 +0100 | [diff] [blame] | 362 | if (fullarg(from,"apic")) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 363 | skip_ioapic_setup = 0; |
| 364 | ioapic_force = 1; |
| 365 | } |
| 366 | |
| 367 | if (!memcmp(from, "mem=", 4)) |
| 368 | parse_memopt(from+4, &from); |
| 369 | |
akpm@osdl.org | 69cda7b | 2006-01-09 20:51:46 -0800 | [diff] [blame] | 370 | if (!memcmp(from, "memmap=", 7)) { |
| 371 | /* exactmap option is for used defined memory */ |
| 372 | if (!memcmp(from+7, "exactmap", 8)) { |
| 373 | #ifdef CONFIG_CRASH_DUMP |
| 374 | /* If we are doing a crash dump, we |
| 375 | * still need to know the real mem |
| 376 | * size before original memory map is |
| 377 | * reset. |
| 378 | */ |
| 379 | saved_max_pfn = e820_end_of_ram(); |
| 380 | #endif |
| 381 | from += 8+7; |
| 382 | end_pfn_map = 0; |
| 383 | e820.nr_map = 0; |
| 384 | userdef = 1; |
| 385 | } |
| 386 | else { |
| 387 | parse_memmapopt(from+7, &from); |
| 388 | userdef = 1; |
| 389 | } |
| 390 | } |
| 391 | |
Matt Tolentino | 2b97690 | 2005-06-23 00:08:06 -0700 | [diff] [blame] | 392 | #ifdef CONFIG_NUMA |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 393 | if (!memcmp(from, "numa=", 5)) |
| 394 | numa_setup(from+5); |
| 395 | #endif |
| 396 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 397 | if (!memcmp(from,"iommu=",6)) { |
| 398 | iommu_setup(from+6); |
| 399 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 400 | |
Andi Kleen | 681558f | 2006-03-25 16:29:46 +0100 | [diff] [blame] | 401 | if (fullarg(from,"oops=panic")) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 402 | panic_on_oops = 1; |
| 403 | |
| 404 | if (!memcmp(from, "noexec=", 7)) |
| 405 | nonx_setup(from + 7); |
| 406 | |
Eric W. Biederman | 5f5609d | 2005-06-25 14:58:04 -0700 | [diff] [blame] | 407 | #ifdef CONFIG_KEXEC |
| 408 | /* crashkernel=size@addr specifies the location to reserve for |
| 409 | * a crash kernel. By reserving this memory we guarantee |
| 410 | * that linux never set's it up as a DMA target. |
| 411 | * Useful for holding code to do something appropriate |
| 412 | * after a kernel panic. |
| 413 | */ |
| 414 | else if (!memcmp(from, "crashkernel=", 12)) { |
| 415 | unsigned long size, base; |
| 416 | size = memparse(from+12, &from); |
| 417 | if (*from == '@') { |
| 418 | base = memparse(from+1, &from); |
| 419 | /* FIXME: Do I want a sanity check |
| 420 | * to validate the memory range? |
| 421 | */ |
| 422 | crashk_res.start = base; |
| 423 | crashk_res.end = base + size - 1; |
| 424 | } |
| 425 | } |
| 426 | #endif |
| 427 | |
Vivek Goyal | aac04b3 | 2006-01-09 20:51:47 -0800 | [diff] [blame] | 428 | #ifdef CONFIG_PROC_VMCORE |
| 429 | /* elfcorehdr= specifies the location of elf core header |
| 430 | * stored by the crashed kernel. This option will be passed |
| 431 | * by kexec loader to the capture kernel. |
| 432 | */ |
| 433 | else if(!memcmp(from, "elfcorehdr=", 11)) |
| 434 | elfcorehdr_addr = memparse(from+11, &from); |
| 435 | #endif |
Andi Kleen | e2c0388 | 2006-02-26 04:18:46 +0100 | [diff] [blame] | 436 | |
Brian Magnuson | d517612 | 2006-02-27 04:02:04 +0100 | [diff] [blame] | 437 | #ifdef CONFIG_HOTPLUG_CPU |
Andi Kleen | e2c0388 | 2006-02-26 04:18:46 +0100 | [diff] [blame] | 438 | else if (!memcmp(from, "additional_cpus=", 16)) |
| 439 | setup_additional_cpus(from+16); |
| 440 | #endif |
| 441 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 442 | next_char: |
| 443 | c = *(from++); |
| 444 | if (!c) |
| 445 | break; |
| 446 | if (COMMAND_LINE_SIZE <= ++len) |
| 447 | break; |
| 448 | *(to++) = c; |
| 449 | } |
akpm@osdl.org | 69cda7b | 2006-01-09 20:51:46 -0800 | [diff] [blame] | 450 | if (userdef) { |
| 451 | printk(KERN_INFO "user-defined physical RAM map:\n"); |
| 452 | e820_print_map("user"); |
| 453 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 454 | *to = '\0'; |
| 455 | *cmdline_p = command_line; |
| 456 | } |
| 457 | |
Matt Tolentino | 2b97690 | 2005-06-23 00:08:06 -0700 | [diff] [blame] | 458 | #ifndef CONFIG_NUMA |
Matt Tolentino | bbfceef | 2005-06-23 00:08:07 -0700 | [diff] [blame] | 459 | static void __init |
| 460 | contig_initmem_init(unsigned long start_pfn, unsigned long end_pfn) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 461 | { |
Matt Tolentino | bbfceef | 2005-06-23 00:08:07 -0700 | [diff] [blame] | 462 | unsigned long bootmap_size, bootmap; |
| 463 | |
Matt Tolentino | bbfceef | 2005-06-23 00:08:07 -0700 | [diff] [blame] | 464 | bootmap_size = bootmem_bootmap_pages(end_pfn)<<PAGE_SHIFT; |
| 465 | bootmap = find_e820_area(0, end_pfn<<PAGE_SHIFT, bootmap_size); |
| 466 | if (bootmap == -1L) |
| 467 | panic("Cannot find bootmem map of size %ld\n",bootmap_size); |
| 468 | bootmap_size = init_bootmem(bootmap >> PAGE_SHIFT, end_pfn); |
| 469 | e820_bootmem_free(NODE_DATA(0), 0, end_pfn << PAGE_SHIFT); |
| 470 | reserve_bootmem(bootmap, bootmap_size); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 471 | } |
| 472 | #endif |
| 473 | |
| 474 | /* Use inline assembly to define this because the nops are defined |
| 475 | as inline assembly strings in the include files and we cannot |
| 476 | get them easily into strings. */ |
| 477 | asm("\t.data\nk8nops: " |
| 478 | K8_NOP1 K8_NOP2 K8_NOP3 K8_NOP4 K8_NOP5 K8_NOP6 |
| 479 | K8_NOP7 K8_NOP8); |
| 480 | |
| 481 | extern unsigned char k8nops[]; |
| 482 | static unsigned char *k8_nops[ASM_NOP_MAX+1] = { |
| 483 | NULL, |
| 484 | k8nops, |
| 485 | k8nops + 1, |
| 486 | k8nops + 1 + 2, |
| 487 | k8nops + 1 + 2 + 3, |
| 488 | k8nops + 1 + 2 + 3 + 4, |
| 489 | k8nops + 1 + 2 + 3 + 4 + 5, |
| 490 | k8nops + 1 + 2 + 3 + 4 + 5 + 6, |
| 491 | k8nops + 1 + 2 + 3 + 4 + 5 + 6 + 7, |
| 492 | }; |
| 493 | |
Andi Kleen | 7f6c5b0 | 2006-01-11 22:45:21 +0100 | [diff] [blame] | 494 | extern char __vsyscall_0; |
| 495 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 496 | /* Replace instructions with better alternatives for this CPU type. |
| 497 | |
| 498 | This runs before SMP is initialized to avoid SMP problems with |
| 499 | self modifying code. This implies that assymetric systems where |
| 500 | APs have less capabilities than the boot processor are not handled. |
| 501 | In this case boot with "noreplacement". */ |
| 502 | void apply_alternatives(void *start, void *end) |
| 503 | { |
| 504 | struct alt_instr *a; |
| 505 | int diff, i, k; |
| 506 | for (a = start; (void *)a < end; a++) { |
Andi Kleen | 7f6c5b0 | 2006-01-11 22:45:21 +0100 | [diff] [blame] | 507 | u8 *instr; |
| 508 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 509 | if (!boot_cpu_has(a->cpuid)) |
| 510 | continue; |
| 511 | |
| 512 | BUG_ON(a->replacementlen > a->instrlen); |
Andi Kleen | 7f6c5b0 | 2006-01-11 22:45:21 +0100 | [diff] [blame] | 513 | instr = a->instr; |
| 514 | /* vsyscall code is not mapped yet. resolve it manually. */ |
| 515 | if (instr >= (u8 *)VSYSCALL_START && instr < (u8*)VSYSCALL_END) |
| 516 | instr = __va(instr - (u8*)VSYSCALL_START + (u8*)__pa_symbol(&__vsyscall_0)); |
| 517 | __inline_memcpy(instr, a->replacement, a->replacementlen); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 518 | diff = a->instrlen - a->replacementlen; |
| 519 | |
| 520 | /* Pad the rest with nops */ |
| 521 | for (i = a->replacementlen; diff > 0; diff -= k, i += k) { |
| 522 | k = diff; |
| 523 | if (k > ASM_NOP_MAX) |
| 524 | k = ASM_NOP_MAX; |
Andi Kleen | 7f6c5b0 | 2006-01-11 22:45:21 +0100 | [diff] [blame] | 525 | __inline_memcpy(instr + i, k8_nops[k], k); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 526 | } |
| 527 | } |
| 528 | } |
| 529 | |
| 530 | static int no_replacement __initdata = 0; |
| 531 | |
| 532 | void __init alternative_instructions(void) |
| 533 | { |
| 534 | extern struct alt_instr __alt_instructions[], __alt_instructions_end[]; |
| 535 | if (no_replacement) |
| 536 | return; |
| 537 | apply_alternatives(__alt_instructions, __alt_instructions_end); |
| 538 | } |
| 539 | |
| 540 | static int __init noreplacement_setup(char *s) |
| 541 | { |
| 542 | no_replacement = 1; |
OGAWA Hirofumi | 9b41046 | 2006-03-31 02:30:33 -0800 | [diff] [blame^] | 543 | return 1; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 544 | } |
| 545 | |
| 546 | __setup("noreplacement", noreplacement_setup); |
| 547 | |
| 548 | #if defined(CONFIG_EDD) || defined(CONFIG_EDD_MODULE) |
| 549 | struct edd edd; |
| 550 | #ifdef CONFIG_EDD_MODULE |
| 551 | EXPORT_SYMBOL(edd); |
| 552 | #endif |
| 553 | /** |
| 554 | * copy_edd() - Copy the BIOS EDD information |
| 555 | * from boot_params into a safe place. |
| 556 | * |
| 557 | */ |
| 558 | static inline void copy_edd(void) |
| 559 | { |
| 560 | memcpy(edd.mbr_signature, EDD_MBR_SIGNATURE, sizeof(edd.mbr_signature)); |
| 561 | memcpy(edd.edd_info, EDD_BUF, sizeof(edd.edd_info)); |
| 562 | edd.mbr_signature_nr = EDD_MBR_SIG_NR; |
| 563 | edd.edd_info_nr = EDD_NR; |
| 564 | } |
| 565 | #else |
| 566 | static inline void copy_edd(void) |
| 567 | { |
| 568 | } |
| 569 | #endif |
| 570 | |
| 571 | #define EBDA_ADDR_POINTER 0x40E |
| 572 | static void __init reserve_ebda_region(void) |
| 573 | { |
| 574 | unsigned int addr; |
| 575 | /** |
| 576 | * there is a real-mode segmented pointer pointing to the |
| 577 | * 4K EBDA area at 0x40E |
| 578 | */ |
| 579 | addr = *(unsigned short *)phys_to_virt(EBDA_ADDR_POINTER); |
| 580 | addr <<= 4; |
| 581 | if (addr) |
| 582 | reserve_bootmem_generic(addr, PAGE_SIZE); |
| 583 | } |
| 584 | |
| 585 | void __init setup_arch(char **cmdline_p) |
| 586 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 587 | unsigned long kernel_end; |
| 588 | |
| 589 | ROOT_DEV = old_decode_dev(ORIG_ROOT_DEV); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 590 | screen_info = SCREEN_INFO; |
| 591 | edid_info = EDID_INFO; |
| 592 | saved_video_mode = SAVED_VIDEO_MODE; |
| 593 | bootloader_type = LOADER_TYPE; |
| 594 | |
| 595 | #ifdef CONFIG_BLK_DEV_RAM |
| 596 | rd_image_start = RAMDISK_FLAGS & RAMDISK_IMAGE_START_MASK; |
| 597 | rd_prompt = ((RAMDISK_FLAGS & RAMDISK_PROMPT_FLAG) != 0); |
| 598 | rd_doload = ((RAMDISK_FLAGS & RAMDISK_LOAD_FLAG) != 0); |
| 599 | #endif |
| 600 | setup_memory_region(); |
| 601 | copy_edd(); |
| 602 | |
| 603 | if (!MOUNT_ROOT_RDONLY) |
| 604 | root_mountflags &= ~MS_RDONLY; |
| 605 | init_mm.start_code = (unsigned long) &_text; |
| 606 | init_mm.end_code = (unsigned long) &_etext; |
| 607 | init_mm.end_data = (unsigned long) &_edata; |
| 608 | init_mm.brk = (unsigned long) &_end; |
| 609 | |
| 610 | code_resource.start = virt_to_phys(&_text); |
| 611 | code_resource.end = virt_to_phys(&_etext)-1; |
| 612 | data_resource.start = virt_to_phys(&_etext); |
| 613 | data_resource.end = virt_to_phys(&_edata)-1; |
| 614 | |
| 615 | parse_cmdline_early(cmdline_p); |
| 616 | |
| 617 | early_identify_cpu(&boot_cpu_data); |
| 618 | |
| 619 | /* |
| 620 | * partially used pages are not usable - thus |
| 621 | * we are rounding upwards: |
| 622 | */ |
| 623 | end_pfn = e820_end_of_ram(); |
Andi Kleen | 1f50249 | 2006-03-25 16:29:58 +0100 | [diff] [blame] | 624 | num_physpages = end_pfn; /* for pfn_valid */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 625 | |
| 626 | check_efer(); |
| 627 | |
| 628 | init_memory_mapping(0, (end_pfn_map << PAGE_SHIFT)); |
| 629 | |
Andi Kleen | f2d3efe | 2006-03-25 16:30:22 +0100 | [diff] [blame] | 630 | dmi_scan_machine(); |
| 631 | |
Siddha, Suresh B | f6c2e33 | 2005-11-05 17:25:53 +0100 | [diff] [blame] | 632 | zap_low_mappings(0); |
| 633 | |
Len Brown | 888ba6c | 2005-08-24 12:07:20 -0400 | [diff] [blame] | 634 | #ifdef CONFIG_ACPI |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 635 | /* |
| 636 | * Initialize the ACPI boot-time table parser (gets the RSDP and SDT). |
| 637 | * Call this early for SRAT node setup. |
| 638 | */ |
| 639 | acpi_boot_table_init(); |
| 640 | #endif |
| 641 | |
| 642 | #ifdef CONFIG_ACPI_NUMA |
| 643 | /* |
| 644 | * Parse SRAT to discover nodes. |
| 645 | */ |
| 646 | acpi_numa_init(); |
| 647 | #endif |
| 648 | |
Matt Tolentino | 2b97690 | 2005-06-23 00:08:06 -0700 | [diff] [blame] | 649 | #ifdef CONFIG_NUMA |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 650 | numa_initmem_init(0, end_pfn); |
| 651 | #else |
Matt Tolentino | bbfceef | 2005-06-23 00:08:07 -0700 | [diff] [blame] | 652 | contig_initmem_init(0, end_pfn); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 653 | #endif |
| 654 | |
| 655 | /* Reserve direct mapping */ |
| 656 | reserve_bootmem_generic(table_start << PAGE_SHIFT, |
| 657 | (table_end - table_start) << PAGE_SHIFT); |
| 658 | |
| 659 | /* reserve kernel */ |
| 660 | kernel_end = round_up(__pa_symbol(&_end),PAGE_SIZE); |
| 661 | reserve_bootmem_generic(HIGH_MEMORY, kernel_end - HIGH_MEMORY); |
| 662 | |
| 663 | /* |
| 664 | * reserve physical page 0 - it's a special BIOS page on many boxes, |
| 665 | * enabling clean reboots, SMP operation, laptop functions. |
| 666 | */ |
| 667 | reserve_bootmem_generic(0, PAGE_SIZE); |
| 668 | |
| 669 | /* reserve ebda region */ |
| 670 | reserve_ebda_region(); |
| 671 | |
| 672 | #ifdef CONFIG_SMP |
| 673 | /* |
| 674 | * But first pinch a few for the stack/trampoline stuff |
| 675 | * FIXME: Don't need the extra page at 4K, but need to fix |
| 676 | * trampoline before removing it. (see the GDT stuff) |
| 677 | */ |
| 678 | reserve_bootmem_generic(PAGE_SIZE, PAGE_SIZE); |
| 679 | |
| 680 | /* Reserve SMP trampoline */ |
| 681 | reserve_bootmem_generic(SMP_TRAMPOLINE_BASE, PAGE_SIZE); |
| 682 | #endif |
| 683 | |
| 684 | #ifdef CONFIG_ACPI_SLEEP |
| 685 | /* |
| 686 | * Reserve low memory region for sleep support. |
| 687 | */ |
| 688 | acpi_reserve_bootmem(); |
| 689 | #endif |
| 690 | #ifdef CONFIG_X86_LOCAL_APIC |
| 691 | /* |
| 692 | * Find and reserve possible boot-time SMP configuration: |
| 693 | */ |
| 694 | find_smp_config(); |
| 695 | #endif |
| 696 | #ifdef CONFIG_BLK_DEV_INITRD |
| 697 | if (LOADER_TYPE && INITRD_START) { |
| 698 | if (INITRD_START + INITRD_SIZE <= (end_pfn << PAGE_SHIFT)) { |
| 699 | reserve_bootmem_generic(INITRD_START, INITRD_SIZE); |
| 700 | initrd_start = |
| 701 | INITRD_START ? INITRD_START + PAGE_OFFSET : 0; |
| 702 | initrd_end = initrd_start+INITRD_SIZE; |
| 703 | } |
| 704 | else { |
| 705 | printk(KERN_ERR "initrd extends beyond end of memory " |
| 706 | "(0x%08lx > 0x%08lx)\ndisabling initrd\n", |
| 707 | (unsigned long)(INITRD_START + INITRD_SIZE), |
| 708 | (unsigned long)(end_pfn << PAGE_SHIFT)); |
| 709 | initrd_start = 0; |
| 710 | } |
| 711 | } |
| 712 | #endif |
Eric W. Biederman | 5f5609d | 2005-06-25 14:58:04 -0700 | [diff] [blame] | 713 | #ifdef CONFIG_KEXEC |
| 714 | if (crashk_res.start != crashk_res.end) { |
| 715 | reserve_bootmem(crashk_res.start, |
| 716 | crashk_res.end - crashk_res.start + 1); |
| 717 | } |
| 718 | #endif |
Eric W. Biederman | 0d317fb | 2005-08-06 13:47:36 -0600 | [diff] [blame] | 719 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 720 | paging_init(); |
| 721 | |
| 722 | check_ioapic(); |
| 723 | |
Ashok Raj | 51f62e1 | 2006-03-25 16:29:28 +0100 | [diff] [blame] | 724 | /* |
| 725 | * set this early, so we dont allocate cpu0 |
| 726 | * if MADT list doesnt list BSP first |
| 727 | * mpparse.c/MP_processor_info() allocates logical cpu numbers. |
| 728 | */ |
| 729 | cpu_set(0, cpu_present_map); |
Len Brown | 888ba6c | 2005-08-24 12:07:20 -0400 | [diff] [blame] | 730 | #ifdef CONFIG_ACPI |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 731 | /* |
| 732 | * Read APIC and some other early information from ACPI tables. |
| 733 | */ |
| 734 | acpi_boot_init(); |
| 735 | #endif |
| 736 | |
Ravikiran Thirumalai | 05b3cbd | 2006-01-11 22:45:36 +0100 | [diff] [blame] | 737 | init_cpu_to_node(); |
| 738 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 739 | #ifdef CONFIG_X86_LOCAL_APIC |
| 740 | /* |
| 741 | * get boot-time SMP configuration: |
| 742 | */ |
| 743 | if (smp_found_config) |
| 744 | get_smp_config(); |
| 745 | init_apic_mappings(); |
| 746 | #endif |
| 747 | |
| 748 | /* |
| 749 | * Request address space for all standard RAM and ROM resources |
| 750 | * and also for regions reported as reserved by the e820. |
| 751 | */ |
| 752 | probe_roms(); |
| 753 | e820_reserve_resources(); |
| 754 | |
| 755 | request_resource(&iomem_resource, &video_ram_resource); |
| 756 | |
| 757 | { |
| 758 | unsigned i; |
| 759 | /* request I/O space for devices used on all i[345]86 PCs */ |
| 760 | for (i = 0; i < STANDARD_IO_RESOURCES; i++) |
| 761 | request_resource(&ioport_resource, &standard_io_resources[i]); |
| 762 | } |
| 763 | |
Andi Kleen | a1e9778 | 2005-04-16 15:25:12 -0700 | [diff] [blame] | 764 | e820_setup_gap(); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 765 | |
| 766 | #ifdef CONFIG_GART_IOMMU |
Jon Mason | 5b7b644 | 2006-02-03 21:51:59 +0100 | [diff] [blame] | 767 | iommu_hole_init(); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 768 | #endif |
| 769 | |
| 770 | #ifdef CONFIG_VT |
| 771 | #if defined(CONFIG_VGA_CONSOLE) |
| 772 | conswitchp = &vga_con; |
| 773 | #elif defined(CONFIG_DUMMY_CONSOLE) |
| 774 | conswitchp = &dummy_con; |
| 775 | #endif |
| 776 | #endif |
| 777 | } |
| 778 | |
Ashok Raj | e6982c6 | 2005-06-25 14:54:58 -0700 | [diff] [blame] | 779 | static int __cpuinit get_model_name(struct cpuinfo_x86 *c) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 780 | { |
| 781 | unsigned int *v; |
| 782 | |
Andi Kleen | ebfcaa9 | 2005-04-16 15:25:18 -0700 | [diff] [blame] | 783 | if (c->extended_cpuid_level < 0x80000004) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 784 | return 0; |
| 785 | |
| 786 | v = (unsigned int *) c->x86_model_id; |
| 787 | cpuid(0x80000002, &v[0], &v[1], &v[2], &v[3]); |
| 788 | cpuid(0x80000003, &v[4], &v[5], &v[6], &v[7]); |
| 789 | cpuid(0x80000004, &v[8], &v[9], &v[10], &v[11]); |
| 790 | c->x86_model_id[48] = 0; |
| 791 | return 1; |
| 792 | } |
| 793 | |
| 794 | |
Ashok Raj | e6982c6 | 2005-06-25 14:54:58 -0700 | [diff] [blame] | 795 | static void __cpuinit display_cacheinfo(struct cpuinfo_x86 *c) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 796 | { |
| 797 | unsigned int n, dummy, eax, ebx, ecx, edx; |
| 798 | |
Andi Kleen | ebfcaa9 | 2005-04-16 15:25:18 -0700 | [diff] [blame] | 799 | n = c->extended_cpuid_level; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 800 | |
| 801 | if (n >= 0x80000005) { |
| 802 | cpuid(0x80000005, &dummy, &ebx, &ecx, &edx); |
| 803 | printk(KERN_INFO "CPU: L1 I Cache: %dK (%d bytes/line), D cache %dK (%d bytes/line)\n", |
| 804 | edx>>24, edx&0xFF, ecx>>24, ecx&0xFF); |
| 805 | c->x86_cache_size=(ecx>>24)+(edx>>24); |
| 806 | /* On K8 L1 TLB is inclusive, so don't count it */ |
| 807 | c->x86_tlbsize = 0; |
| 808 | } |
| 809 | |
| 810 | if (n >= 0x80000006) { |
| 811 | cpuid(0x80000006, &dummy, &ebx, &ecx, &edx); |
| 812 | ecx = cpuid_ecx(0x80000006); |
| 813 | c->x86_cache_size = ecx >> 16; |
| 814 | c->x86_tlbsize += ((ebx >> 16) & 0xfff) + (ebx & 0xfff); |
| 815 | |
| 816 | printk(KERN_INFO "CPU: L2 Cache: %dK (%d bytes/line)\n", |
| 817 | c->x86_cache_size, ecx & 0xFF); |
| 818 | } |
| 819 | |
| 820 | if (n >= 0x80000007) |
| 821 | cpuid(0x80000007, &dummy, &dummy, &dummy, &c->x86_power); |
| 822 | if (n >= 0x80000008) { |
| 823 | cpuid(0x80000008, &eax, &dummy, &dummy, &dummy); |
| 824 | c->x86_virt_bits = (eax >> 8) & 0xff; |
| 825 | c->x86_phys_bits = eax & 0xff; |
| 826 | } |
| 827 | } |
| 828 | |
Andi Kleen | 3f098c2 | 2005-09-12 18:49:24 +0200 | [diff] [blame] | 829 | #ifdef CONFIG_NUMA |
| 830 | static int nearby_node(int apicid) |
| 831 | { |
| 832 | int i; |
| 833 | for (i = apicid - 1; i >= 0; i--) { |
| 834 | int node = apicid_to_node[i]; |
| 835 | if (node != NUMA_NO_NODE && node_online(node)) |
| 836 | return node; |
| 837 | } |
| 838 | for (i = apicid + 1; i < MAX_LOCAL_APIC; i++) { |
| 839 | int node = apicid_to_node[i]; |
| 840 | if (node != NUMA_NO_NODE && node_online(node)) |
| 841 | return node; |
| 842 | } |
| 843 | return first_node(node_online_map); /* Shouldn't happen */ |
| 844 | } |
| 845 | #endif |
| 846 | |
Andi Kleen | 6351864 | 2005-04-16 15:25:16 -0700 | [diff] [blame] | 847 | /* |
| 848 | * On a AMD dual core setup the lower bits of the APIC id distingush the cores. |
| 849 | * Assumes number of cores is a power of two. |
| 850 | */ |
| 851 | static void __init amd_detect_cmp(struct cpuinfo_x86 *c) |
| 852 | { |
| 853 | #ifdef CONFIG_SMP |
Andi Kleen | 2942283 | 2005-05-16 21:53:26 -0700 | [diff] [blame] | 854 | int cpu = smp_processor_id(); |
Andi Kleen | b41e293 | 2005-05-20 14:27:55 -0700 | [diff] [blame] | 855 | unsigned bits; |
Andi Kleen | 3f098c2 | 2005-09-12 18:49:24 +0200 | [diff] [blame] | 856 | #ifdef CONFIG_NUMA |
| 857 | int node = 0; |
Ravikiran G Thirumalai | 60c1bc8 | 2006-03-25 16:30:04 +0100 | [diff] [blame] | 858 | unsigned apicid = hard_smp_processor_id(); |
Andi Kleen | 3f098c2 | 2005-09-12 18:49:24 +0200 | [diff] [blame] | 859 | #endif |
Andi Kleen | b41e293 | 2005-05-20 14:27:55 -0700 | [diff] [blame] | 860 | |
| 861 | bits = 0; |
Siddha, Suresh B | 94605ef | 2005-11-05 17:25:54 +0100 | [diff] [blame] | 862 | while ((1 << bits) < c->x86_max_cores) |
Andi Kleen | b41e293 | 2005-05-20 14:27:55 -0700 | [diff] [blame] | 863 | bits++; |
| 864 | |
| 865 | /* Low order bits define the core id (index of core in socket) */ |
| 866 | cpu_core_id[cpu] = phys_proc_id[cpu] & ((1 << bits)-1); |
| 867 | /* Convert the APIC ID into the socket ID */ |
Ravikiran G Thirumalai | 60c1bc8 | 2006-03-25 16:30:04 +0100 | [diff] [blame] | 868 | phys_proc_id[cpu] = phys_pkg_id(bits); |
Andi Kleen | 6351864 | 2005-04-16 15:25:16 -0700 | [diff] [blame] | 869 | |
| 870 | #ifdef CONFIG_NUMA |
Andi Kleen | 3f098c2 | 2005-09-12 18:49:24 +0200 | [diff] [blame] | 871 | node = phys_proc_id[cpu]; |
| 872 | if (apicid_to_node[apicid] != NUMA_NO_NODE) |
| 873 | node = apicid_to_node[apicid]; |
| 874 | if (!node_online(node)) { |
| 875 | /* Two possibilities here: |
| 876 | - The CPU is missing memory and no node was created. |
| 877 | In that case try picking one from a nearby CPU |
| 878 | - The APIC IDs differ from the HyperTransport node IDs |
| 879 | which the K8 northbridge parsing fills in. |
| 880 | Assume they are all increased by a constant offset, |
| 881 | but in the same order as the HT nodeids. |
| 882 | If that doesn't result in a usable node fall back to the |
| 883 | path for the previous case. */ |
| 884 | int ht_nodeid = apicid - (phys_proc_id[0] << bits); |
| 885 | if (ht_nodeid >= 0 && |
| 886 | apicid_to_node[ht_nodeid] != NUMA_NO_NODE) |
| 887 | node = apicid_to_node[ht_nodeid]; |
| 888 | /* Pick a nearby node */ |
| 889 | if (!node_online(node)) |
| 890 | node = nearby_node(apicid); |
| 891 | } |
Andi Kleen | 69d81fc | 2005-11-05 17:25:53 +0100 | [diff] [blame] | 892 | numa_set_node(cpu, node); |
Andi Kleen | a158608 | 2005-05-16 21:53:21 -0700 | [diff] [blame] | 893 | |
Andi Kleen | 77d910f | 2006-03-25 16:29:34 +0100 | [diff] [blame] | 894 | printk(KERN_INFO "CPU %d/%x(%d) -> Node %d -> Core %d\n", |
| 895 | cpu, apicid, c->x86_max_cores, node, cpu_core_id[cpu]); |
Andi Kleen | 3f098c2 | 2005-09-12 18:49:24 +0200 | [diff] [blame] | 896 | #endif |
Andi Kleen | 6351864 | 2005-04-16 15:25:16 -0700 | [diff] [blame] | 897 | #endif |
| 898 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 899 | |
| 900 | static int __init init_amd(struct cpuinfo_x86 *c) |
| 901 | { |
| 902 | int r; |
Andi Kleen | 7bcd3f3 | 2006-02-03 21:51:02 +0100 | [diff] [blame] | 903 | unsigned level; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 904 | |
Linus Torvalds | bc5e8fd | 2005-09-17 15:41:04 -0700 | [diff] [blame] | 905 | #ifdef CONFIG_SMP |
| 906 | unsigned long value; |
| 907 | |
Andi Kleen | 7d318d7 | 2005-09-29 22:05:55 +0200 | [diff] [blame] | 908 | /* |
| 909 | * Disable TLB flush filter by setting HWCR.FFDIS on K8 |
| 910 | * bit 6 of msr C001_0015 |
| 911 | * |
| 912 | * Errata 63 for SH-B3 steppings |
| 913 | * Errata 122 for all steppings (F+ have it disabled by default) |
| 914 | */ |
| 915 | if (c->x86 == 15) { |
| 916 | rdmsrl(MSR_K8_HWCR, value); |
| 917 | value |= 1 << 6; |
| 918 | wrmsrl(MSR_K8_HWCR, value); |
| 919 | } |
Linus Torvalds | bc5e8fd | 2005-09-17 15:41:04 -0700 | [diff] [blame] | 920 | #endif |
| 921 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 922 | /* Bit 31 in normal CPUID used for nonstandard 3DNow ID; |
| 923 | 3DNow is IDd by bit 31 in extended CPUID (1*32+31) anyway */ |
| 924 | clear_bit(0*32+31, &c->x86_capability); |
| 925 | |
Andi Kleen | 7bcd3f3 | 2006-02-03 21:51:02 +0100 | [diff] [blame] | 926 | /* On C+ stepping K8 rep microcode works well for copy/memset */ |
| 927 | level = cpuid_eax(1); |
| 928 | if (c->x86 == 15 && ((level >= 0x0f48 && level < 0x0f50) || level >= 0x0f58)) |
| 929 | set_bit(X86_FEATURE_REP_GOOD, &c->x86_capability); |
| 930 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 931 | r = get_model_name(c); |
| 932 | if (!r) { |
| 933 | switch (c->x86) { |
| 934 | case 15: |
| 935 | /* Should distinguish Models here, but this is only |
| 936 | a fallback anyways. */ |
| 937 | strcpy(c->x86_model_id, "Hammer"); |
| 938 | break; |
| 939 | } |
| 940 | } |
| 941 | display_cacheinfo(c); |
| 942 | |
Andi Kleen | 130951c | 2006-01-11 22:42:02 +0100 | [diff] [blame] | 943 | /* c->x86_power is 8000_0007 edx. Bit 8 is constant TSC */ |
| 944 | if (c->x86_power & (1<<8)) |
| 945 | set_bit(X86_FEATURE_CONSTANT_TSC, &c->x86_capability); |
| 946 | |
Andi Kleen | ebfcaa9 | 2005-04-16 15:25:18 -0700 | [diff] [blame] | 947 | if (c->extended_cpuid_level >= 0x80000008) { |
Siddha, Suresh B | 94605ef | 2005-11-05 17:25:54 +0100 | [diff] [blame] | 948 | c->x86_max_cores = (cpuid_ecx(0x80000008) & 0xff) + 1; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 949 | |
Andi Kleen | 6351864 | 2005-04-16 15:25:16 -0700 | [diff] [blame] | 950 | amd_detect_cmp(c); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 951 | } |
| 952 | |
| 953 | return r; |
| 954 | } |
| 955 | |
Ashok Raj | e6982c6 | 2005-06-25 14:54:58 -0700 | [diff] [blame] | 956 | static void __cpuinit detect_ht(struct cpuinfo_x86 *c) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 957 | { |
| 958 | #ifdef CONFIG_SMP |
| 959 | u32 eax, ebx, ecx, edx; |
Siddha, Suresh B | 94605ef | 2005-11-05 17:25:54 +0100 | [diff] [blame] | 960 | int index_msb, core_bits; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 961 | int cpu = smp_processor_id(); |
Siddha, Suresh B | 94605ef | 2005-11-05 17:25:54 +0100 | [diff] [blame] | 962 | |
| 963 | cpuid(1, &eax, &ebx, &ecx, &edx); |
| 964 | |
Siddha, Suresh B | 94605ef | 2005-11-05 17:25:54 +0100 | [diff] [blame] | 965 | |
Andi Kleen | 6351864 | 2005-04-16 15:25:16 -0700 | [diff] [blame] | 966 | if (!cpu_has(c, X86_FEATURE_HT) || cpu_has(c, X86_FEATURE_CMP_LEGACY)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 967 | return; |
| 968 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 969 | smp_num_siblings = (ebx & 0xff0000) >> 16; |
Siddha, Suresh B | 94605ef | 2005-11-05 17:25:54 +0100 | [diff] [blame] | 970 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 971 | if (smp_num_siblings == 1) { |
| 972 | printk(KERN_INFO "CPU: Hyper-Threading is disabled\n"); |
Siddha, Suresh B | 94605ef | 2005-11-05 17:25:54 +0100 | [diff] [blame] | 973 | } else if (smp_num_siblings > 1 ) { |
| 974 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 975 | if (smp_num_siblings > NR_CPUS) { |
| 976 | printk(KERN_WARNING "CPU: Unsupported number of the siblings %d", smp_num_siblings); |
| 977 | smp_num_siblings = 1; |
| 978 | return; |
| 979 | } |
Siddha, Suresh B | 94605ef | 2005-11-05 17:25:54 +0100 | [diff] [blame] | 980 | |
| 981 | index_msb = get_count_order(smp_num_siblings); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 982 | phys_proc_id[cpu] = phys_pkg_id(index_msb); |
Siddha, Suresh B | 94605ef | 2005-11-05 17:25:54 +0100 | [diff] [blame] | 983 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 984 | printk(KERN_INFO "CPU: Physical Processor ID: %d\n", |
| 985 | phys_proc_id[cpu]); |
Andi Kleen | 3dd9d51 | 2005-04-16 15:25:15 -0700 | [diff] [blame] | 986 | |
Siddha, Suresh B | 94605ef | 2005-11-05 17:25:54 +0100 | [diff] [blame] | 987 | smp_num_siblings = smp_num_siblings / c->x86_max_cores; |
Andi Kleen | 3dd9d51 | 2005-04-16 15:25:15 -0700 | [diff] [blame] | 988 | |
Siddha, Suresh B | 94605ef | 2005-11-05 17:25:54 +0100 | [diff] [blame] | 989 | index_msb = get_count_order(smp_num_siblings) ; |
Andi Kleen | 3dd9d51 | 2005-04-16 15:25:15 -0700 | [diff] [blame] | 990 | |
Siddha, Suresh B | 94605ef | 2005-11-05 17:25:54 +0100 | [diff] [blame] | 991 | core_bits = get_count_order(c->x86_max_cores); |
Andi Kleen | 3dd9d51 | 2005-04-16 15:25:15 -0700 | [diff] [blame] | 992 | |
Siddha, Suresh B | 94605ef | 2005-11-05 17:25:54 +0100 | [diff] [blame] | 993 | cpu_core_id[cpu] = phys_pkg_id(index_msb) & |
| 994 | ((1 << core_bits) - 1); |
| 995 | |
| 996 | if (c->x86_max_cores > 1) |
Andi Kleen | 3dd9d51 | 2005-04-16 15:25:15 -0700 | [diff] [blame] | 997 | printk(KERN_INFO "CPU: Processor Core ID: %d\n", |
| 998 | cpu_core_id[cpu]); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 999 | } |
| 1000 | #endif |
| 1001 | } |
| 1002 | |
Andi Kleen | 3dd9d51 | 2005-04-16 15:25:15 -0700 | [diff] [blame] | 1003 | /* |
| 1004 | * find out the number of processor cores on the die |
| 1005 | */ |
Ashok Raj | e6982c6 | 2005-06-25 14:54:58 -0700 | [diff] [blame] | 1006 | static int __cpuinit intel_num_cpu_cores(struct cpuinfo_x86 *c) |
Andi Kleen | 3dd9d51 | 2005-04-16 15:25:15 -0700 | [diff] [blame] | 1007 | { |
| 1008 | unsigned int eax; |
| 1009 | |
| 1010 | if (c->cpuid_level < 4) |
| 1011 | return 1; |
| 1012 | |
| 1013 | __asm__("cpuid" |
| 1014 | : "=a" (eax) |
| 1015 | : "0" (4), "c" (0) |
| 1016 | : "bx", "dx"); |
| 1017 | |
| 1018 | if (eax & 0x1f) |
| 1019 | return ((eax >> 26) + 1); |
| 1020 | else |
| 1021 | return 1; |
| 1022 | } |
| 1023 | |
Andi Kleen | df0cc26 | 2005-09-12 18:49:24 +0200 | [diff] [blame] | 1024 | static void srat_detect_node(void) |
| 1025 | { |
| 1026 | #ifdef CONFIG_NUMA |
Ravikiran G Thirumalai | ddea7be | 2005-10-03 10:36:28 -0700 | [diff] [blame] | 1027 | unsigned node; |
Andi Kleen | df0cc26 | 2005-09-12 18:49:24 +0200 | [diff] [blame] | 1028 | int cpu = smp_processor_id(); |
| 1029 | |
| 1030 | /* Don't do the funky fallback heuristics the AMD version employs |
| 1031 | for now. */ |
Ravikiran G Thirumalai | ddea7be | 2005-10-03 10:36:28 -0700 | [diff] [blame] | 1032 | node = apicid_to_node[hard_smp_processor_id()]; |
Andi Kleen | df0cc26 | 2005-09-12 18:49:24 +0200 | [diff] [blame] | 1033 | if (node == NUMA_NO_NODE) |
| 1034 | node = 0; |
Andi Kleen | 69d81fc | 2005-11-05 17:25:53 +0100 | [diff] [blame] | 1035 | numa_set_node(cpu, node); |
Andi Kleen | df0cc26 | 2005-09-12 18:49:24 +0200 | [diff] [blame] | 1036 | |
| 1037 | if (acpi_numa > 0) |
| 1038 | printk(KERN_INFO "CPU %d -> Node %d\n", cpu, node); |
| 1039 | #endif |
| 1040 | } |
| 1041 | |
Ashok Raj | e6982c6 | 2005-06-25 14:54:58 -0700 | [diff] [blame] | 1042 | static void __cpuinit init_intel(struct cpuinfo_x86 *c) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1043 | { |
| 1044 | /* Cache sizes */ |
| 1045 | unsigned n; |
| 1046 | |
| 1047 | init_intel_cacheinfo(c); |
Andi Kleen | ebfcaa9 | 2005-04-16 15:25:18 -0700 | [diff] [blame] | 1048 | n = c->extended_cpuid_level; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1049 | if (n >= 0x80000008) { |
| 1050 | unsigned eax = cpuid_eax(0x80000008); |
| 1051 | c->x86_virt_bits = (eax >> 8) & 0xff; |
| 1052 | c->x86_phys_bits = eax & 0xff; |
Shaohua Li | af9c142 | 2005-11-05 17:25:54 +0100 | [diff] [blame] | 1053 | /* CPUID workaround for Intel 0F34 CPU */ |
| 1054 | if (c->x86_vendor == X86_VENDOR_INTEL && |
| 1055 | c->x86 == 0xF && c->x86_model == 0x3 && |
| 1056 | c->x86_mask == 0x4) |
| 1057 | c->x86_phys_bits = 36; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1058 | } |
| 1059 | |
| 1060 | if (c->x86 == 15) |
| 1061 | c->x86_cache_alignment = c->x86_clflush_size * 2; |
Andi Kleen | 39b3a79 | 2006-01-11 22:42:45 +0100 | [diff] [blame] | 1062 | if ((c->x86 == 0xf && c->x86_model >= 0x03) || |
| 1063 | (c->x86 == 0x6 && c->x86_model >= 0x0e)) |
Andi Kleen | c29601e | 2005-04-16 15:25:05 -0700 | [diff] [blame] | 1064 | set_bit(X86_FEATURE_CONSTANT_TSC, &c->x86_capability); |
Andi Kleen | c818a18 | 2006-01-11 22:45:24 +0100 | [diff] [blame] | 1065 | set_bit(X86_FEATURE_SYNC_RDTSC, &c->x86_capability); |
Siddha, Suresh B | 94605ef | 2005-11-05 17:25:54 +0100 | [diff] [blame] | 1066 | c->x86_max_cores = intel_num_cpu_cores(c); |
Andi Kleen | df0cc26 | 2005-09-12 18:49:24 +0200 | [diff] [blame] | 1067 | |
| 1068 | srat_detect_node(); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1069 | } |
| 1070 | |
Adrian Bunk | 672289e | 2005-09-10 00:27:21 -0700 | [diff] [blame] | 1071 | static void __cpuinit get_cpu_vendor(struct cpuinfo_x86 *c) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1072 | { |
| 1073 | char *v = c->x86_vendor_id; |
| 1074 | |
| 1075 | if (!strcmp(v, "AuthenticAMD")) |
| 1076 | c->x86_vendor = X86_VENDOR_AMD; |
| 1077 | else if (!strcmp(v, "GenuineIntel")) |
| 1078 | c->x86_vendor = X86_VENDOR_INTEL; |
| 1079 | else |
| 1080 | c->x86_vendor = X86_VENDOR_UNKNOWN; |
| 1081 | } |
| 1082 | |
| 1083 | struct cpu_model_info { |
| 1084 | int vendor; |
| 1085 | int family; |
| 1086 | char *model_names[16]; |
| 1087 | }; |
| 1088 | |
| 1089 | /* Do some early cpuid on the boot CPU to get some parameter that are |
| 1090 | needed before check_bugs. Everything advanced is in identify_cpu |
| 1091 | below. */ |
Ashok Raj | e6982c6 | 2005-06-25 14:54:58 -0700 | [diff] [blame] | 1092 | void __cpuinit early_identify_cpu(struct cpuinfo_x86 *c) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1093 | { |
| 1094 | u32 tfms; |
| 1095 | |
| 1096 | c->loops_per_jiffy = loops_per_jiffy; |
| 1097 | c->x86_cache_size = -1; |
| 1098 | c->x86_vendor = X86_VENDOR_UNKNOWN; |
| 1099 | c->x86_model = c->x86_mask = 0; /* So far unknown... */ |
| 1100 | c->x86_vendor_id[0] = '\0'; /* Unset */ |
| 1101 | c->x86_model_id[0] = '\0'; /* Unset */ |
| 1102 | c->x86_clflush_size = 64; |
| 1103 | c->x86_cache_alignment = c->x86_clflush_size; |
Siddha, Suresh B | 94605ef | 2005-11-05 17:25:54 +0100 | [diff] [blame] | 1104 | c->x86_max_cores = 1; |
Andi Kleen | ebfcaa9 | 2005-04-16 15:25:18 -0700 | [diff] [blame] | 1105 | c->extended_cpuid_level = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1106 | memset(&c->x86_capability, 0, sizeof c->x86_capability); |
| 1107 | |
| 1108 | /* Get vendor name */ |
| 1109 | cpuid(0x00000000, (unsigned int *)&c->cpuid_level, |
| 1110 | (unsigned int *)&c->x86_vendor_id[0], |
| 1111 | (unsigned int *)&c->x86_vendor_id[8], |
| 1112 | (unsigned int *)&c->x86_vendor_id[4]); |
| 1113 | |
| 1114 | get_cpu_vendor(c); |
| 1115 | |
| 1116 | /* Initialize the standard set of capabilities */ |
| 1117 | /* Note that the vendor-specific code below might override */ |
| 1118 | |
| 1119 | /* Intel-defined flags: level 0x00000001 */ |
| 1120 | if (c->cpuid_level >= 0x00000001) { |
| 1121 | __u32 misc; |
| 1122 | cpuid(0x00000001, &tfms, &misc, &c->x86_capability[4], |
| 1123 | &c->x86_capability[0]); |
| 1124 | c->x86 = (tfms >> 8) & 0xf; |
| 1125 | c->x86_model = (tfms >> 4) & 0xf; |
| 1126 | c->x86_mask = tfms & 0xf; |
Suresh Siddha | f5f786d | 2005-11-05 17:25:53 +0100 | [diff] [blame] | 1127 | if (c->x86 == 0xf) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1128 | c->x86 += (tfms >> 20) & 0xff; |
Suresh Siddha | f5f786d | 2005-11-05 17:25:53 +0100 | [diff] [blame] | 1129 | if (c->x86 >= 0x6) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1130 | c->x86_model += ((tfms >> 16) & 0xF) << 4; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1131 | if (c->x86_capability[0] & (1<<19)) |
| 1132 | c->x86_clflush_size = ((misc >> 8) & 0xff) * 8; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1133 | } else { |
| 1134 | /* Have CPUID level 0 only - unheard of */ |
| 1135 | c->x86 = 4; |
| 1136 | } |
Andi Kleen | a158608 | 2005-05-16 21:53:21 -0700 | [diff] [blame] | 1137 | |
| 1138 | #ifdef CONFIG_SMP |
Andi Kleen | b41e293 | 2005-05-20 14:27:55 -0700 | [diff] [blame] | 1139 | phys_proc_id[smp_processor_id()] = (cpuid_ebx(1) >> 24) & 0xff; |
Andi Kleen | a158608 | 2005-05-16 21:53:21 -0700 | [diff] [blame] | 1140 | #endif |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1141 | } |
| 1142 | |
| 1143 | /* |
| 1144 | * This does the hard work of actually picking apart the CPU stuff... |
| 1145 | */ |
Ashok Raj | e6982c6 | 2005-06-25 14:54:58 -0700 | [diff] [blame] | 1146 | void __cpuinit identify_cpu(struct cpuinfo_x86 *c) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1147 | { |
| 1148 | int i; |
| 1149 | u32 xlvl; |
| 1150 | |
| 1151 | early_identify_cpu(c); |
| 1152 | |
| 1153 | /* AMD-defined flags: level 0x80000001 */ |
| 1154 | xlvl = cpuid_eax(0x80000000); |
Andi Kleen | ebfcaa9 | 2005-04-16 15:25:18 -0700 | [diff] [blame] | 1155 | c->extended_cpuid_level = xlvl; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1156 | if ((xlvl & 0xffff0000) == 0x80000000) { |
| 1157 | if (xlvl >= 0x80000001) { |
| 1158 | c->x86_capability[1] = cpuid_edx(0x80000001); |
H. Peter Anvin | 5b7abc6 | 2005-05-01 08:58:49 -0700 | [diff] [blame] | 1159 | c->x86_capability[6] = cpuid_ecx(0x80000001); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1160 | } |
| 1161 | if (xlvl >= 0x80000004) |
| 1162 | get_model_name(c); /* Default name */ |
| 1163 | } |
| 1164 | |
| 1165 | /* Transmeta-defined flags: level 0x80860001 */ |
| 1166 | xlvl = cpuid_eax(0x80860000); |
| 1167 | if ((xlvl & 0xffff0000) == 0x80860000) { |
| 1168 | /* Don't set x86_cpuid_level here for now to not confuse. */ |
| 1169 | if (xlvl >= 0x80860001) |
| 1170 | c->x86_capability[2] = cpuid_edx(0x80860001); |
| 1171 | } |
| 1172 | |
Siddha, Suresh B | 1e9f28f | 2006-03-27 01:15:22 -0800 | [diff] [blame] | 1173 | c->apicid = phys_pkg_id(0); |
| 1174 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1175 | /* |
| 1176 | * Vendor-specific initialization. In this section we |
| 1177 | * canonicalize the feature flags, meaning if there are |
| 1178 | * features a certain CPU supports which CPUID doesn't |
| 1179 | * tell us, CPUID claiming incorrect flags, or other bugs, |
| 1180 | * we handle them here. |
| 1181 | * |
| 1182 | * At the end of this section, c->x86_capability better |
| 1183 | * indicate the features this CPU genuinely supports! |
| 1184 | */ |
| 1185 | switch (c->x86_vendor) { |
| 1186 | case X86_VENDOR_AMD: |
| 1187 | init_amd(c); |
| 1188 | break; |
| 1189 | |
| 1190 | case X86_VENDOR_INTEL: |
| 1191 | init_intel(c); |
| 1192 | break; |
| 1193 | |
| 1194 | case X86_VENDOR_UNKNOWN: |
| 1195 | default: |
| 1196 | display_cacheinfo(c); |
| 1197 | break; |
| 1198 | } |
| 1199 | |
| 1200 | select_idle_routine(c); |
| 1201 | detect_ht(c); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1202 | |
| 1203 | /* |
| 1204 | * On SMP, boot_cpu_data holds the common feature set between |
| 1205 | * all CPUs; so make sure that we indicate which features are |
| 1206 | * common between the CPUs. The first time this routine gets |
| 1207 | * executed, c == &boot_cpu_data. |
| 1208 | */ |
| 1209 | if (c != &boot_cpu_data) { |
| 1210 | /* AND the already accumulated flags with these */ |
| 1211 | for (i = 0 ; i < NCAPINTS ; i++) |
| 1212 | boot_cpu_data.x86_capability[i] &= c->x86_capability[i]; |
| 1213 | } |
| 1214 | |
| 1215 | #ifdef CONFIG_X86_MCE |
| 1216 | mcheck_init(c); |
| 1217 | #endif |
Shaohua Li | 3b520b2 | 2005-07-07 17:56:38 -0700 | [diff] [blame] | 1218 | if (c == &boot_cpu_data) |
| 1219 | mtrr_bp_init(); |
| 1220 | else |
| 1221 | mtrr_ap_init(); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1222 | #ifdef CONFIG_NUMA |
Andi Kleen | 3019e8e | 2005-07-28 21:15:28 -0700 | [diff] [blame] | 1223 | numa_add_cpu(smp_processor_id()); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1224 | #endif |
| 1225 | } |
| 1226 | |
| 1227 | |
Ashok Raj | e6982c6 | 2005-06-25 14:54:58 -0700 | [diff] [blame] | 1228 | void __cpuinit print_cpu_info(struct cpuinfo_x86 *c) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1229 | { |
| 1230 | if (c->x86_model_id[0]) |
| 1231 | printk("%s", c->x86_model_id); |
| 1232 | |
| 1233 | if (c->x86_mask || c->cpuid_level >= 0) |
| 1234 | printk(" stepping %02x\n", c->x86_mask); |
| 1235 | else |
| 1236 | printk("\n"); |
| 1237 | } |
| 1238 | |
| 1239 | /* |
| 1240 | * Get CPU information for use by the procfs. |
| 1241 | */ |
| 1242 | |
| 1243 | static int show_cpuinfo(struct seq_file *m, void *v) |
| 1244 | { |
| 1245 | struct cpuinfo_x86 *c = v; |
| 1246 | |
| 1247 | /* |
| 1248 | * These flag bits must match the definitions in <asm/cpufeature.h>. |
| 1249 | * NULL means this bit is undefined or reserved; either way it doesn't |
| 1250 | * have meaning as far as Linux is concerned. Note that it's important |
| 1251 | * to realize there is a difference between this table and CPUID -- if |
| 1252 | * applications want to get the raw CPUID data, they should access |
| 1253 | * /dev/cpu/<cpu_nr>/cpuid instead. |
| 1254 | */ |
| 1255 | static char *x86_cap_flags[] = { |
| 1256 | /* Intel-defined */ |
| 1257 | "fpu", "vme", "de", "pse", "tsc", "msr", "pae", "mce", |
| 1258 | "cx8", "apic", NULL, "sep", "mtrr", "pge", "mca", "cmov", |
| 1259 | "pat", "pse36", "pn", "clflush", NULL, "dts", "acpi", "mmx", |
| 1260 | "fxsr", "sse", "sse2", "ss", "ht", "tm", "ia64", NULL, |
| 1261 | |
| 1262 | /* AMD-defined */ |
Zwane Mwaikambo | 3c3b73b | 2005-05-01 08:58:51 -0700 | [diff] [blame] | 1263 | NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1264 | NULL, NULL, NULL, "syscall", NULL, NULL, NULL, NULL, |
| 1265 | NULL, NULL, NULL, NULL, "nx", NULL, "mmxext", NULL, |
Andi Kleen | 3f98bc4 | 2006-01-11 22:42:51 +0100 | [diff] [blame] | 1266 | NULL, "fxsr_opt", "rdtscp", NULL, NULL, "lm", "3dnowext", "3dnow", |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1267 | |
| 1268 | /* Transmeta-defined */ |
| 1269 | "recovery", "longrun", NULL, "lrti", NULL, NULL, NULL, NULL, |
| 1270 | NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, |
| 1271 | NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, |
| 1272 | NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, |
| 1273 | |
| 1274 | /* Other (Linux-defined) */ |
Andi Kleen | 622dcaf | 2005-05-16 21:53:26 -0700 | [diff] [blame] | 1275 | "cxmmx", NULL, "cyrix_arr", "centaur_mcr", NULL, |
Andi Kleen | c29601e | 2005-04-16 15:25:05 -0700 | [diff] [blame] | 1276 | "constant_tsc", NULL, NULL, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1277 | NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, |
| 1278 | NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, |
| 1279 | NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, |
| 1280 | |
| 1281 | /* Intel-defined (#2) */ |
Andi Kleen | 9d95dd8 | 2006-03-25 16:31:22 +0100 | [diff] [blame] | 1282 | "pni", NULL, NULL, "monitor", "ds_cpl", "vmx", "smx", "est", |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1283 | "tm2", NULL, "cid", NULL, NULL, "cx16", "xtpr", NULL, |
| 1284 | NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, |
| 1285 | NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, |
| 1286 | |
H. Peter Anvin | 5b7abc6 | 2005-05-01 08:58:49 -0700 | [diff] [blame] | 1287 | /* VIA/Cyrix/Centaur-defined */ |
| 1288 | NULL, NULL, "rng", "rng_en", NULL, NULL, "ace", "ace_en", |
| 1289 | NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, |
| 1290 | NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, |
| 1291 | NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, |
| 1292 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1293 | /* AMD-defined (#2) */ |
Andi Kleen | 3f98bc4 | 2006-01-11 22:42:51 +0100 | [diff] [blame] | 1294 | "lahf_lm", "cmp_legacy", "svm", NULL, "cr8_legacy", NULL, NULL, NULL, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1295 | NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, |
| 1296 | NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, |
H. Peter Anvin | 5b7abc6 | 2005-05-01 08:58:49 -0700 | [diff] [blame] | 1297 | NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1298 | }; |
| 1299 | static char *x86_power_flags[] = { |
| 1300 | "ts", /* temperature sensor */ |
| 1301 | "fid", /* frequency id control */ |
| 1302 | "vid", /* voltage id control */ |
| 1303 | "ttp", /* thermal trip */ |
| 1304 | "tm", |
Andi Kleen | 3f98bc4 | 2006-01-11 22:42:51 +0100 | [diff] [blame] | 1305 | "stc", |
| 1306 | NULL, |
Andi Kleen | 39b3a79 | 2006-01-11 22:42:45 +0100 | [diff] [blame] | 1307 | /* nothing */ /* constant_tsc - moved to flags */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1308 | }; |
| 1309 | |
| 1310 | |
| 1311 | #ifdef CONFIG_SMP |
| 1312 | if (!cpu_online(c-cpu_data)) |
| 1313 | return 0; |
| 1314 | #endif |
| 1315 | |
| 1316 | seq_printf(m,"processor\t: %u\n" |
| 1317 | "vendor_id\t: %s\n" |
| 1318 | "cpu family\t: %d\n" |
| 1319 | "model\t\t: %d\n" |
| 1320 | "model name\t: %s\n", |
| 1321 | (unsigned)(c-cpu_data), |
| 1322 | c->x86_vendor_id[0] ? c->x86_vendor_id : "unknown", |
| 1323 | c->x86, |
| 1324 | (int)c->x86_model, |
| 1325 | c->x86_model_id[0] ? c->x86_model_id : "unknown"); |
| 1326 | |
| 1327 | if (c->x86_mask || c->cpuid_level >= 0) |
| 1328 | seq_printf(m, "stepping\t: %d\n", c->x86_mask); |
| 1329 | else |
| 1330 | seq_printf(m, "stepping\t: unknown\n"); |
| 1331 | |
| 1332 | if (cpu_has(c,X86_FEATURE_TSC)) { |
Venkatesh Pallipadi | 95235ca | 2005-12-02 10:43:20 -0800 | [diff] [blame] | 1333 | unsigned int freq = cpufreq_quick_get((unsigned)(c-cpu_data)); |
| 1334 | if (!freq) |
| 1335 | freq = cpu_khz; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1336 | seq_printf(m, "cpu MHz\t\t: %u.%03u\n", |
Venkatesh Pallipadi | 95235ca | 2005-12-02 10:43:20 -0800 | [diff] [blame] | 1337 | freq / 1000, (freq % 1000)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1338 | } |
| 1339 | |
| 1340 | /* Cache size */ |
| 1341 | if (c->x86_cache_size >= 0) |
| 1342 | seq_printf(m, "cache size\t: %d KB\n", c->x86_cache_size); |
| 1343 | |
| 1344 | #ifdef CONFIG_SMP |
Siddha, Suresh B | 94605ef | 2005-11-05 17:25:54 +0100 | [diff] [blame] | 1345 | if (smp_num_siblings * c->x86_max_cores > 1) { |
Andi Kleen | db46868 | 2005-04-16 15:24:51 -0700 | [diff] [blame] | 1346 | int cpu = c - cpu_data; |
| 1347 | seq_printf(m, "physical id\t: %d\n", phys_proc_id[cpu]); |
Siddha, Suresh B | 94605ef | 2005-11-05 17:25:54 +0100 | [diff] [blame] | 1348 | seq_printf(m, "siblings\t: %d\n", cpus_weight(cpu_core_map[cpu])); |
Siddha, Suresh B | d31ddaa | 2005-04-16 15:25:20 -0700 | [diff] [blame] | 1349 | seq_printf(m, "core id\t\t: %d\n", cpu_core_id[cpu]); |
Siddha, Suresh B | 94605ef | 2005-11-05 17:25:54 +0100 | [diff] [blame] | 1350 | seq_printf(m, "cpu cores\t: %d\n", c->booted_cores); |
Andi Kleen | db46868 | 2005-04-16 15:24:51 -0700 | [diff] [blame] | 1351 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1352 | #endif |
| 1353 | |
| 1354 | seq_printf(m, |
| 1355 | "fpu\t\t: yes\n" |
| 1356 | "fpu_exception\t: yes\n" |
| 1357 | "cpuid level\t: %d\n" |
| 1358 | "wp\t\t: yes\n" |
| 1359 | "flags\t\t:", |
| 1360 | c->cpuid_level); |
| 1361 | |
| 1362 | { |
| 1363 | int i; |
| 1364 | for ( i = 0 ; i < 32*NCAPINTS ; i++ ) |
Akinobu Mita | 3d1712c | 2006-03-24 03:15:11 -0800 | [diff] [blame] | 1365 | if (cpu_has(c, i) && x86_cap_flags[i] != NULL) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1366 | seq_printf(m, " %s", x86_cap_flags[i]); |
| 1367 | } |
| 1368 | |
| 1369 | seq_printf(m, "\nbogomips\t: %lu.%02lu\n", |
| 1370 | c->loops_per_jiffy/(500000/HZ), |
| 1371 | (c->loops_per_jiffy/(5000/HZ)) % 100); |
| 1372 | |
| 1373 | if (c->x86_tlbsize > 0) |
| 1374 | seq_printf(m, "TLB size\t: %d 4K pages\n", c->x86_tlbsize); |
| 1375 | seq_printf(m, "clflush size\t: %d\n", c->x86_clflush_size); |
| 1376 | seq_printf(m, "cache_alignment\t: %d\n", c->x86_cache_alignment); |
| 1377 | |
| 1378 | seq_printf(m, "address sizes\t: %u bits physical, %u bits virtual\n", |
| 1379 | c->x86_phys_bits, c->x86_virt_bits); |
| 1380 | |
| 1381 | seq_printf(m, "power management:"); |
| 1382 | { |
| 1383 | unsigned i; |
| 1384 | for (i = 0; i < 32; i++) |
| 1385 | if (c->x86_power & (1 << i)) { |
Andi Kleen | 3f98bc4 | 2006-01-11 22:42:51 +0100 | [diff] [blame] | 1386 | if (i < ARRAY_SIZE(x86_power_flags) && |
| 1387 | x86_power_flags[i]) |
| 1388 | seq_printf(m, "%s%s", |
| 1389 | x86_power_flags[i][0]?" ":"", |
| 1390 | x86_power_flags[i]); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1391 | else |
| 1392 | seq_printf(m, " [%d]", i); |
| 1393 | } |
| 1394 | } |
Andi Kleen | 3dd9d51 | 2005-04-16 15:25:15 -0700 | [diff] [blame] | 1395 | |
Siddha, Suresh B | d31ddaa | 2005-04-16 15:25:20 -0700 | [diff] [blame] | 1396 | seq_printf(m, "\n\n"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1397 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1398 | return 0; |
| 1399 | } |
| 1400 | |
| 1401 | static void *c_start(struct seq_file *m, loff_t *pos) |
| 1402 | { |
| 1403 | return *pos < NR_CPUS ? cpu_data + *pos : NULL; |
| 1404 | } |
| 1405 | |
| 1406 | static void *c_next(struct seq_file *m, void *v, loff_t *pos) |
| 1407 | { |
| 1408 | ++*pos; |
| 1409 | return c_start(m, pos); |
| 1410 | } |
| 1411 | |
| 1412 | static void c_stop(struct seq_file *m, void *v) |
| 1413 | { |
| 1414 | } |
| 1415 | |
| 1416 | struct seq_operations cpuinfo_op = { |
| 1417 | .start =c_start, |
| 1418 | .next = c_next, |
| 1419 | .stop = c_stop, |
| 1420 | .show = show_cpuinfo, |
| 1421 | }; |
Andi Kleen | e992867 | 2006-01-11 22:43:33 +0100 | [diff] [blame] | 1422 | |