diff options
Diffstat (limited to 'arch/x86/kernel/cpu/common.c')
-rw-r--r-- | arch/x86/kernel/cpu/common.c | 105 |
1 files changed, 56 insertions, 49 deletions
diff --git a/arch/x86/kernel/cpu/common.c b/arch/x86/kernel/cpu/common.c index 0fd6be154d5d..ef9e31b89b35 100644 --- a/arch/x86/kernel/cpu/common.c +++ b/arch/x86/kernel/cpu/common.c | |||
@@ -62,9 +62,9 @@ __u32 cleared_cpu_caps[NCAPINTS] __cpuinitdata; | |||
62 | static int cachesize_override __cpuinitdata = -1; | 62 | static int cachesize_override __cpuinitdata = -1; |
63 | static int disable_x86_serial_nr __cpuinitdata = 1; | 63 | static int disable_x86_serial_nr __cpuinitdata = 1; |
64 | 64 | ||
65 | struct cpu_dev * cpu_devs[X86_VENDOR_NUM] = {}; | 65 | struct cpu_dev *cpu_devs[X86_VENDOR_NUM] = {}; |
66 | 66 | ||
67 | static void __cpuinit default_init(struct cpuinfo_x86 * c) | 67 | static void __cpuinit default_init(struct cpuinfo_x86 *c) |
68 | { | 68 | { |
69 | /* Not much we can do here... */ | 69 | /* Not much we can do here... */ |
70 | /* Check if at least it has cpuid */ | 70 | /* Check if at least it has cpuid */ |
@@ -81,11 +81,11 @@ static struct cpu_dev __cpuinitdata default_cpu = { | |||
81 | .c_init = default_init, | 81 | .c_init = default_init, |
82 | .c_vendor = "Unknown", | 82 | .c_vendor = "Unknown", |
83 | }; | 83 | }; |
84 | static struct cpu_dev * this_cpu __cpuinitdata = &default_cpu; | 84 | static struct cpu_dev *this_cpu __cpuinitdata = &default_cpu; |
85 | 85 | ||
86 | static int __init cachesize_setup(char *str) | 86 | static int __init cachesize_setup(char *str) |
87 | { | 87 | { |
88 | get_option (&str, &cachesize_override); | 88 | get_option(&str, &cachesize_override); |
89 | return 1; | 89 | return 1; |
90 | } | 90 | } |
91 | __setup("cachesize=", cachesize_setup); | 91 | __setup("cachesize=", cachesize_setup); |
@@ -107,12 +107,12 @@ int __cpuinit get_model_name(struct cpuinfo_x86 *c) | |||
107 | /* Intel chips right-justify this string for some dumb reason; | 107 | /* Intel chips right-justify this string for some dumb reason; |
108 | undo that brain damage */ | 108 | undo that brain damage */ |
109 | p = q = &c->x86_model_id[0]; | 109 | p = q = &c->x86_model_id[0]; |
110 | while ( *p == ' ' ) | 110 | while (*p == ' ') |
111 | p++; | 111 | p++; |
112 | if ( p != q ) { | 112 | if (p != q) { |
113 | while ( *p ) | 113 | while (*p) |
114 | *q++ = *p++; | 114 | *q++ = *p++; |
115 | while ( q <= &c->x86_model_id[48] ) | 115 | while (q <= &c->x86_model_id[48]) |
116 | *q++ = '\0'; /* Zero-pad the rest */ | 116 | *q++ = '\0'; /* Zero-pad the rest */ |
117 | } | 117 | } |
118 | 118 | ||
@@ -130,7 +130,7 @@ void __cpuinit display_cacheinfo(struct cpuinfo_x86 *c) | |||
130 | cpuid(0x80000005, &dummy, &dummy, &ecx, &edx); | 130 | cpuid(0x80000005, &dummy, &dummy, &ecx, &edx); |
131 | printk(KERN_INFO "CPU: L1 I Cache: %dK (%d bytes/line), D cache %dK (%d bytes/line)\n", | 131 | printk(KERN_INFO "CPU: L1 I Cache: %dK (%d bytes/line), D cache %dK (%d bytes/line)\n", |
132 | edx>>24, edx&0xFF, ecx>>24, ecx&0xFF); | 132 | edx>>24, edx&0xFF, ecx>>24, ecx&0xFF); |
133 | c->x86_cache_size=(ecx>>24)+(edx>>24); | 133 | c->x86_cache_size = (ecx>>24)+(edx>>24); |
134 | } | 134 | } |
135 | 135 | ||
136 | if (n < 0x80000006) /* Some chips just has a large L1. */ | 136 | if (n < 0x80000006) /* Some chips just has a large L1. */ |
@@ -138,16 +138,16 @@ void __cpuinit display_cacheinfo(struct cpuinfo_x86 *c) | |||
138 | 138 | ||
139 | ecx = cpuid_ecx(0x80000006); | 139 | ecx = cpuid_ecx(0x80000006); |
140 | l2size = ecx >> 16; | 140 | l2size = ecx >> 16; |
141 | 141 | ||
142 | /* do processor-specific cache resizing */ | 142 | /* do processor-specific cache resizing */ |
143 | if (this_cpu->c_size_cache) | 143 | if (this_cpu->c_size_cache) |
144 | l2size = this_cpu->c_size_cache(c,l2size); | 144 | l2size = this_cpu->c_size_cache(c, l2size); |
145 | 145 | ||
146 | /* Allow user to override all this if necessary. */ | 146 | /* Allow user to override all this if necessary. */ |
147 | if (cachesize_override != -1) | 147 | if (cachesize_override != -1) |
148 | l2size = cachesize_override; | 148 | l2size = cachesize_override; |
149 | 149 | ||
150 | if ( l2size == 0 ) | 150 | if (l2size == 0) |
151 | return; /* Again, no L2 cache is possible */ | 151 | return; /* Again, no L2 cache is possible */ |
152 | 152 | ||
153 | c->x86_cache_size = l2size; | 153 | c->x86_cache_size = l2size; |
@@ -156,16 +156,19 @@ void __cpuinit display_cacheinfo(struct cpuinfo_x86 *c) | |||
156 | l2size, ecx & 0xFF); | 156 | l2size, ecx & 0xFF); |
157 | } | 157 | } |
158 | 158 | ||
159 | /* Naming convention should be: <Name> [(<Codename>)] */ | 159 | /* |
160 | /* This table only is used unless init_<vendor>() below doesn't set it; */ | 160 | * Naming convention should be: <Name> [(<Codename>)] |
161 | /* in particular, if CPUID levels 0x80000002..4 are supported, this isn't used */ | 161 | * This table only is used unless init_<vendor>() below doesn't set it; |
162 | * in particular, if CPUID levels 0x80000002..4 are supported, this isn't used | ||
163 | * | ||
164 | */ | ||
162 | 165 | ||
163 | /* Look up CPU names by table lookup. */ | 166 | /* Look up CPU names by table lookup. */ |
164 | static char __cpuinit *table_lookup_model(struct cpuinfo_x86 *c) | 167 | static char __cpuinit *table_lookup_model(struct cpuinfo_x86 *c) |
165 | { | 168 | { |
166 | struct cpu_model_info *info; | 169 | struct cpu_model_info *info; |
167 | 170 | ||
168 | if ( c->x86_model >= 16 ) | 171 | if (c->x86_model >= 16) |
169 | return NULL; /* Range check */ | 172 | return NULL; /* Range check */ |
170 | 173 | ||
171 | if (!this_cpu) | 174 | if (!this_cpu) |
@@ -190,9 +193,9 @@ static void __cpuinit get_cpu_vendor(struct cpuinfo_x86 *c, int early) | |||
190 | 193 | ||
191 | for (i = 0; i < X86_VENDOR_NUM; i++) { | 194 | for (i = 0; i < X86_VENDOR_NUM; i++) { |
192 | if (cpu_devs[i]) { | 195 | if (cpu_devs[i]) { |
193 | if (!strcmp(v,cpu_devs[i]->c_ident[0]) || | 196 | if (!strcmp(v, cpu_devs[i]->c_ident[0]) || |
194 | (cpu_devs[i]->c_ident[1] && | 197 | (cpu_devs[i]->c_ident[1] && |
195 | !strcmp(v,cpu_devs[i]->c_ident[1]))) { | 198 | !strcmp(v, cpu_devs[i]->c_ident[1]))) { |
196 | c->x86_vendor = i; | 199 | c->x86_vendor = i; |
197 | if (!early) | 200 | if (!early) |
198 | this_cpu = cpu_devs[i]; | 201 | this_cpu = cpu_devs[i]; |
@@ -210,7 +213,7 @@ static void __cpuinit get_cpu_vendor(struct cpuinfo_x86 *c, int early) | |||
210 | } | 213 | } |
211 | 214 | ||
212 | 215 | ||
213 | static int __init x86_fxsr_setup(char * s) | 216 | static int __init x86_fxsr_setup(char *s) |
214 | { | 217 | { |
215 | setup_clear_cpu_cap(X86_FEATURE_FXSR); | 218 | setup_clear_cpu_cap(X86_FEATURE_FXSR); |
216 | setup_clear_cpu_cap(X86_FEATURE_XMM); | 219 | setup_clear_cpu_cap(X86_FEATURE_XMM); |
@@ -219,7 +222,7 @@ static int __init x86_fxsr_setup(char * s) | |||
219 | __setup("nofxsr", x86_fxsr_setup); | 222 | __setup("nofxsr", x86_fxsr_setup); |
220 | 223 | ||
221 | 224 | ||
222 | static int __init x86_sep_setup(char * s) | 225 | static int __init x86_sep_setup(char *s) |
223 | { | 226 | { |
224 | setup_clear_cpu_cap(X86_FEATURE_SEP); | 227 | setup_clear_cpu_cap(X86_FEATURE_SEP); |
225 | return 1; | 228 | return 1; |
@@ -308,12 +311,15 @@ static void __cpuinit early_get_cap(struct cpuinfo_x86 *c) | |||
308 | 311 | ||
309 | } | 312 | } |
310 | 313 | ||
311 | /* Do minimum CPU detection early. | 314 | /* |
312 | Fields really needed: vendor, cpuid_level, family, model, mask, cache alignment. | 315 | * Do minimum CPU detection early. |
313 | The others are not touched to avoid unwanted side effects. | 316 | * Fields really needed: vendor, cpuid_level, family, model, mask, |
314 | 317 | * cache alignment. | |
315 | WARNING: this function is only called on the BP. Don't add code here | 318 | * The others are not touched to avoid unwanted side effects. |
316 | that is supposed to run on all CPUs. */ | 319 | * |
320 | * WARNING: this function is only called on the BP. Don't add code here | ||
321 | * that is supposed to run on all CPUs. | ||
322 | */ | ||
317 | static void __init early_cpu_detect(void) | 323 | static void __init early_cpu_detect(void) |
318 | { | 324 | { |
319 | struct cpuinfo_x86 *c = &boot_cpu_data; | 325 | struct cpuinfo_x86 *c = &boot_cpu_data; |
@@ -335,7 +341,7 @@ static void __init early_cpu_detect(void) | |||
335 | early_get_cap(c); | 341 | early_get_cap(c); |
336 | } | 342 | } |
337 | 343 | ||
338 | static void __cpuinit generic_identify(struct cpuinfo_x86 * c) | 344 | static void __cpuinit generic_identify(struct cpuinfo_x86 *c) |
339 | { | 345 | { |
340 | u32 tfms, xlvl; | 346 | u32 tfms, xlvl; |
341 | unsigned int ebx; | 347 | unsigned int ebx; |
@@ -346,13 +352,12 @@ static void __cpuinit generic_identify(struct cpuinfo_x86 * c) | |||
346 | (unsigned int *)&c->x86_vendor_id[0], | 352 | (unsigned int *)&c->x86_vendor_id[0], |
347 | (unsigned int *)&c->x86_vendor_id[8], | 353 | (unsigned int *)&c->x86_vendor_id[8], |
348 | (unsigned int *)&c->x86_vendor_id[4]); | 354 | (unsigned int *)&c->x86_vendor_id[4]); |
349 | 355 | ||
350 | get_cpu_vendor(c, 0); | 356 | get_cpu_vendor(c, 0); |
351 | /* Initialize the standard set of capabilities */ | 357 | /* Initialize the standard set of capabilities */ |
352 | /* Note that the vendor-specific code below might override */ | 358 | /* Note that the vendor-specific code below might override */ |
353 | |||
354 | /* Intel-defined flags: level 0x00000001 */ | 359 | /* Intel-defined flags: level 0x00000001 */ |
355 | if ( c->cpuid_level >= 0x00000001 ) { | 360 | if (c->cpuid_level >= 0x00000001) { |
356 | u32 capability, excap; | 361 | u32 capability, excap; |
357 | cpuid(0x00000001, &tfms, &ebx, &excap, &capability); | 362 | cpuid(0x00000001, &tfms, &ebx, &excap, &capability); |
358 | c->x86_capability[0] = capability; | 363 | c->x86_capability[0] = capability; |
@@ -378,12 +383,12 @@ static void __cpuinit generic_identify(struct cpuinfo_x86 * c) | |||
378 | 383 | ||
379 | /* AMD-defined flags: level 0x80000001 */ | 384 | /* AMD-defined flags: level 0x80000001 */ |
380 | xlvl = cpuid_eax(0x80000000); | 385 | xlvl = cpuid_eax(0x80000000); |
381 | if ( (xlvl & 0xffff0000) == 0x80000000 ) { | 386 | if ((xlvl & 0xffff0000) == 0x80000000) { |
382 | if ( xlvl >= 0x80000001 ) { | 387 | if (xlvl >= 0x80000001) { |
383 | c->x86_capability[1] = cpuid_edx(0x80000001); | 388 | c->x86_capability[1] = cpuid_edx(0x80000001); |
384 | c->x86_capability[6] = cpuid_ecx(0x80000001); | 389 | c->x86_capability[6] = cpuid_ecx(0x80000001); |
385 | } | 390 | } |
386 | if ( xlvl >= 0x80000004 ) | 391 | if (xlvl >= 0x80000004) |
387 | get_model_name(c); /* Default name */ | 392 | get_model_name(c); /* Default name */ |
388 | } | 393 | } |
389 | 394 | ||
@@ -397,12 +402,12 @@ static void __cpuinit generic_identify(struct cpuinfo_x86 * c) | |||
397 | 402 | ||
398 | static void __cpuinit squash_the_stupid_serial_number(struct cpuinfo_x86 *c) | 403 | static void __cpuinit squash_the_stupid_serial_number(struct cpuinfo_x86 *c) |
399 | { | 404 | { |
400 | if (cpu_has(c, X86_FEATURE_PN) && disable_x86_serial_nr ) { | 405 | if (cpu_has(c, X86_FEATURE_PN) && disable_x86_serial_nr) { |
401 | /* Disable processor serial number */ | 406 | /* Disable processor serial number */ |
402 | unsigned long lo,hi; | 407 | unsigned long lo, hi; |
403 | rdmsr(MSR_IA32_BBL_CR_CTL,lo,hi); | 408 | rdmsr(MSR_IA32_BBL_CR_CTL, lo, hi); |
404 | lo |= 0x200000; | 409 | lo |= 0x200000; |
405 | wrmsr(MSR_IA32_BBL_CR_CTL,lo,hi); | 410 | wrmsr(MSR_IA32_BBL_CR_CTL, lo, hi); |
406 | printk(KERN_NOTICE "CPU serial number disabled.\n"); | 411 | printk(KERN_NOTICE "CPU serial number disabled.\n"); |
407 | clear_bit(X86_FEATURE_PN, c->x86_capability); | 412 | clear_bit(X86_FEATURE_PN, c->x86_capability); |
408 | 413 | ||
@@ -439,9 +444,11 @@ void __cpuinit identify_cpu(struct cpuinfo_x86 *c) | |||
439 | memset(&c->x86_capability, 0, sizeof c->x86_capability); | 444 | memset(&c->x86_capability, 0, sizeof c->x86_capability); |
440 | 445 | ||
441 | if (!have_cpuid_p()) { | 446 | if (!have_cpuid_p()) { |
442 | /* First of all, decide if this is a 486 or higher */ | 447 | /* |
443 | /* It's a 486 if we can modify the AC flag */ | 448 | * First of all, decide if this is a 486 or higher |
444 | if ( flag_is_changeable_p(X86_EFLAGS_AC) ) | 449 | * It's a 486 if we can modify the AC flag |
450 | */ | ||
451 | if (flag_is_changeable_p(X86_EFLAGS_AC)) | ||
445 | c->x86 = 4; | 452 | c->x86 = 4; |
446 | else | 453 | else |
447 | c->x86 = 3; | 454 | c->x86 = 3; |
@@ -474,10 +481,10 @@ void __cpuinit identify_cpu(struct cpuinfo_x86 *c) | |||
474 | */ | 481 | */ |
475 | 482 | ||
476 | /* If the model name is still unset, do table lookup. */ | 483 | /* If the model name is still unset, do table lookup. */ |
477 | if ( !c->x86_model_id[0] ) { | 484 | if (!c->x86_model_id[0]) { |
478 | char *p; | 485 | char *p; |
479 | p = table_lookup_model(c); | 486 | p = table_lookup_model(c); |
480 | if ( p ) | 487 | if (p) |
481 | strcpy(c->x86_model_id, p); | 488 | strcpy(c->x86_model_id, p); |
482 | else | 489 | else |
483 | /* Last resort... */ | 490 | /* Last resort... */ |
@@ -491,9 +498,9 @@ void __cpuinit identify_cpu(struct cpuinfo_x86 *c) | |||
491 | * common between the CPUs. The first time this routine gets | 498 | * common between the CPUs. The first time this routine gets |
492 | * executed, c == &boot_cpu_data. | 499 | * executed, c == &boot_cpu_data. |
493 | */ | 500 | */ |
494 | if ( c != &boot_cpu_data ) { | 501 | if (c != &boot_cpu_data) { |
495 | /* AND the already accumulated flags with these */ | 502 | /* AND the already accumulated flags with these */ |
496 | for ( i = 0 ; i < NCAPINTS ; i++ ) | 503 | for (i = 0 ; i < NCAPINTS ; i++) |
497 | boot_cpu_data.x86_capability[i] &= c->x86_capability[i]; | 504 | boot_cpu_data.x86_capability[i] &= c->x86_capability[i]; |
498 | } | 505 | } |
499 | 506 | ||
@@ -537,7 +544,7 @@ void __cpuinit detect_ht(struct cpuinfo_x86 *c) | |||
537 | 544 | ||
538 | if (smp_num_siblings == 1) { | 545 | if (smp_num_siblings == 1) { |
539 | printk(KERN_INFO "CPU: Hyper-Threading is disabled\n"); | 546 | printk(KERN_INFO "CPU: Hyper-Threading is disabled\n"); |
540 | } else if (smp_num_siblings > 1 ) { | 547 | } else if (smp_num_siblings > 1) { |
541 | 548 | ||
542 | if (smp_num_siblings > NR_CPUS) { | 549 | if (smp_num_siblings > NR_CPUS) { |
543 | printk(KERN_WARNING "CPU: Unsupported number of the " | 550 | printk(KERN_WARNING "CPU: Unsupported number of the " |
@@ -592,7 +599,7 @@ void __cpuinit print_cpu_info(struct cpuinfo_x86 *c) | |||
592 | else | 599 | else |
593 | printk("%s", c->x86_model_id); | 600 | printk("%s", c->x86_model_id); |
594 | 601 | ||
595 | if (c->x86_mask || c->cpuid_level >= 0) | 602 | if (c->x86_mask || c->cpuid_level >= 0) |
596 | printk(" stepping %02x\n", c->x86_mask); | 603 | printk(" stepping %02x\n", c->x86_mask); |
597 | else | 604 | else |
598 | printk("\n"); | 605 | printk("\n"); |
@@ -653,7 +660,7 @@ void __cpuinit cpu_init(void) | |||
653 | { | 660 | { |
654 | int cpu = smp_processor_id(); | 661 | int cpu = smp_processor_id(); |
655 | struct task_struct *curr = current; | 662 | struct task_struct *curr = current; |
656 | struct tss_struct * t = &per_cpu(init_tss, cpu); | 663 | struct tss_struct *t = &per_cpu(init_tss, cpu); |
657 | struct thread_struct *thread = &curr->thread; | 664 | struct thread_struct *thread = &curr->thread; |
658 | 665 | ||
659 | if (cpu_test_and_set(cpu, cpu_initialized)) { | 666 | if (cpu_test_and_set(cpu, cpu_initialized)) { |
@@ -679,7 +686,7 @@ void __cpuinit cpu_init(void) | |||
679 | enter_lazy_tlb(&init_mm, curr); | 686 | enter_lazy_tlb(&init_mm, curr); |
680 | 687 | ||
681 | load_sp0(t, thread); | 688 | load_sp0(t, thread); |
682 | set_tss_desc(cpu,t); | 689 | set_tss_desc(cpu, t); |
683 | load_TR_desc(); | 690 | load_TR_desc(); |
684 | load_LDT(&init_mm.context); | 691 | load_LDT(&init_mm.context); |
685 | 692 | ||