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Diffstat (limited to 'arch/x86/kernel/cpu/intel.c')
-rw-r--r--arch/x86/kernel/cpu/intel.c142
1 files changed, 142 insertions, 0 deletions
diff --git a/arch/x86/kernel/cpu/intel.c b/arch/x86/kernel/cpu/intel.c
index 3e6ff6cbf42a..ed0d512cf51b 100644
--- a/arch/x86/kernel/cpu/intel.c
+++ b/arch/x86/kernel/cpu/intel.c
@@ -491,6 +491,147 @@ static unsigned int __cpuinit intel_size_cache(struct cpuinfo_x86 *c, unsigned i
491} 491}
492#endif 492#endif
493 493
494#define TLB_INST_4K 0x01
495#define TLB_INST_4M 0x02
496#define TLB_INST_2M_4M 0x03
497
498#define TLB_INST_ALL 0x05
499#define TLB_INST_1G 0x06
500
501#define TLB_DATA_4K 0x11
502#define TLB_DATA_4M 0x12
503#define TLB_DATA_2M_4M 0x13
504#define TLB_DATA_4K_4M 0x14
505
506#define TLB_DATA_1G 0x16
507
508#define TLB_DATA0_4K 0x21
509#define TLB_DATA0_4M 0x22
510#define TLB_DATA0_2M_4M 0x23
511
512#define STLB_4K 0x41
513
514static const struct _tlb_table intel_tlb_table[] __cpuinitconst = {
515 { 0x01, TLB_INST_4K, 32, " TLB_INST 4 KByte pages, 4-way set associative" },
516 { 0x02, TLB_INST_4M, 2, " TLB_INST 4 MByte pages, full associative" },
517 { 0x03, TLB_DATA_4K, 64, " TLB_DATA 4 KByte pages, 4-way set associative" },
518 { 0x04, TLB_DATA_4M, 8, " TLB_DATA 4 MByte pages, 4-way set associative" },
519 { 0x05, TLB_DATA_4M, 32, " TLB_DATA 4 MByte pages, 4-way set associative" },
520 { 0x0b, TLB_INST_4M, 4, " TLB_INST 4 MByte pages, 4-way set associative" },
521 { 0x4f, TLB_INST_4K, 32, " TLB_INST 4 KByte pages */" },
522 { 0x50, TLB_INST_ALL, 64, " TLB_INST 4 KByte and 2-MByte or 4-MByte pages" },
523 { 0x51, TLB_INST_ALL, 128, " TLB_INST 4 KByte and 2-MByte or 4-MByte pages" },
524 { 0x52, TLB_INST_ALL, 256, " TLB_INST 4 KByte and 2-MByte or 4-MByte pages" },
525 { 0x55, TLB_INST_2M_4M, 7, " TLB_INST 2-MByte or 4-MByte pages, fully associative" },
526 { 0x56, TLB_DATA0_4M, 16, " TLB_DATA0 4 MByte pages, 4-way set associative" },
527 { 0x57, TLB_DATA0_4K, 16, " TLB_DATA0 4 KByte pages, 4-way associative" },
528 { 0x59, TLB_DATA0_4K, 16, " TLB_DATA0 4 KByte pages, fully associative" },
529 { 0x5a, TLB_DATA0_2M_4M, 32, " TLB_DATA0 2-MByte or 4 MByte pages, 4-way set associative" },
530 { 0x5b, TLB_DATA_4K_4M, 64, " TLB_DATA 4 KByte and 4 MByte pages" },
531 { 0x5c, TLB_DATA_4K_4M, 128, " TLB_DATA 4 KByte and 4 MByte pages" },
532 { 0x5d, TLB_DATA_4K_4M, 256, " TLB_DATA 4 KByte and 4 MByte pages" },
533 { 0xb0, TLB_INST_4K, 128, " TLB_INST 4 KByte pages, 4-way set associative" },
534 { 0xb1, TLB_INST_2M_4M, 4, " TLB_INST 2M pages, 4-way, 8 entries or 4M pages, 4-way entries" },
535 { 0xb2, TLB_INST_4K, 64, " TLB_INST 4KByte pages, 4-way set associative" },
536 { 0xb3, TLB_DATA_4K, 128, " TLB_DATA 4 KByte pages, 4-way set associative" },
537 { 0xb4, TLB_DATA_4K, 256, " TLB_DATA 4 KByte pages, 4-way associative" },
538 { 0xba, TLB_DATA_4K, 64, " TLB_DATA 4 KByte pages, 4-way associative" },
539 { 0xc0, TLB_DATA_4K_4M, 8, " TLB_DATA 4 KByte and 4 MByte pages, 4-way associative" },
540 { 0xca, STLB_4K, 512, " STLB 4 KByte pages, 4-way associative" },
541 { 0x00, 0, 0 }
542};
543
544static void __cpuinit intel_tlb_lookup(const unsigned char desc)
545{
546 unsigned char k;
547 if (desc == 0)
548 return;
549
550 /* look up this descriptor in the table */
551 for (k = 0; intel_tlb_table[k].descriptor != desc && \
552 intel_tlb_table[k].descriptor != 0; k++)
553 ;
554
555 if (intel_tlb_table[k].tlb_type == 0)
556 return;
557
558 switch (intel_tlb_table[k].tlb_type) {
559 case STLB_4K:
560 if (tlb_lli_4k[ENTRIES] < intel_tlb_table[k].entries)
561 tlb_lli_4k[ENTRIES] = intel_tlb_table[k].entries;
562 if (tlb_lld_4k[ENTRIES] < intel_tlb_table[k].entries)
563 tlb_lld_4k[ENTRIES] = intel_tlb_table[k].entries;
564 break;
565 case TLB_INST_ALL:
566 if (tlb_lli_4k[ENTRIES] < intel_tlb_table[k].entries)
567 tlb_lli_4k[ENTRIES] = intel_tlb_table[k].entries;
568 if (tlb_lli_2m[ENTRIES] < intel_tlb_table[k].entries)
569 tlb_lli_2m[ENTRIES] = intel_tlb_table[k].entries;
570 if (tlb_lli_4m[ENTRIES] < intel_tlb_table[k].entries)
571 tlb_lli_4m[ENTRIES] = intel_tlb_table[k].entries;
572 break;
573 case TLB_INST_4K:
574 if (tlb_lli_4k[ENTRIES] < intel_tlb_table[k].entries)
575 tlb_lli_4k[ENTRIES] = intel_tlb_table[k].entries;
576 break;
577 case TLB_INST_4M:
578 if (tlb_lli_4m[ENTRIES] < intel_tlb_table[k].entries)
579 tlb_lli_4m[ENTRIES] = intel_tlb_table[k].entries;
580 break;
581 case TLB_INST_2M_4M:
582 if (tlb_lli_2m[ENTRIES] < intel_tlb_table[k].entries)
583 tlb_lli_2m[ENTRIES] = intel_tlb_table[k].entries;
584 if (tlb_lli_4m[ENTRIES] < intel_tlb_table[k].entries)
585 tlb_lli_4m[ENTRIES] = intel_tlb_table[k].entries;
586 break;
587 case TLB_DATA_4K:
588 case TLB_DATA0_4K:
589 if (tlb_lld_4k[ENTRIES] < intel_tlb_table[k].entries)
590 tlb_lld_4k[ENTRIES] = intel_tlb_table[k].entries;
591 break;
592 case TLB_DATA_4M:
593 case TLB_DATA0_4M:
594 if (tlb_lld_4m[ENTRIES] < intel_tlb_table[k].entries)
595 tlb_lld_4m[ENTRIES] = intel_tlb_table[k].entries;
596 break;
597 case TLB_DATA_2M_4M:
598 case TLB_DATA0_2M_4M:
599 if (tlb_lld_2m[ENTRIES] < intel_tlb_table[k].entries)
600 tlb_lld_2m[ENTRIES] = intel_tlb_table[k].entries;
601 if (tlb_lld_4m[ENTRIES] < intel_tlb_table[k].entries)
602 tlb_lld_4m[ENTRIES] = intel_tlb_table[k].entries;
603 break;
604 case TLB_DATA_4K_4M:
605 if (tlb_lld_4k[ENTRIES] < intel_tlb_table[k].entries)
606 tlb_lld_4k[ENTRIES] = intel_tlb_table[k].entries;
607 if (tlb_lld_4m[ENTRIES] < intel_tlb_table[k].entries)
608 tlb_lld_4m[ENTRIES] = intel_tlb_table[k].entries;
609 break;
610 }
611}
612
613static void __cpuinit intel_detect_tlb(struct cpuinfo_x86 *c)
614{
615 int i, j, n;
616 unsigned int regs[4];
617 unsigned char *desc = (unsigned char *)regs;
618 /* Number of times to iterate */
619 n = cpuid_eax(2) & 0xFF;
620
621 for (i = 0 ; i < n ; i++) {
622 cpuid(2, &regs[0], &regs[1], &regs[2], &regs[3]);
623
624 /* If bit 31 is set, this is an unknown format */
625 for (j = 0 ; j < 3 ; j++)
626 if (regs[j] & (1 << 31))
627 regs[j] = 0;
628
629 /* Byte 0 is level count, not a descriptor */
630 for (j = 1 ; j < 16 ; j++)
631 intel_tlb_lookup(desc[j]);
632 }
633}
634
494static const struct cpu_dev __cpuinitconst intel_cpu_dev = { 635static const struct cpu_dev __cpuinitconst intel_cpu_dev = {
495 .c_vendor = "Intel", 636 .c_vendor = "Intel",
496 .c_ident = { "GenuineIntel" }, 637 .c_ident = { "GenuineIntel" },
@@ -546,6 +687,7 @@ static const struct cpu_dev __cpuinitconst intel_cpu_dev = {
546 }, 687 },
547 .c_size_cache = intel_size_cache, 688 .c_size_cache = intel_size_cache,
548#endif 689#endif
690 .c_detect_tlb = intel_detect_tlb,
549 .c_early_init = early_init_intel, 691 .c_early_init = early_init_intel,
550 .c_init = init_intel, 692 .c_init = init_intel,
551 .c_x86_vendor = X86_VENDOR_INTEL, 693 .c_x86_vendor = X86_VENDOR_INTEL,
generated by cgit v1.2.2 (git 2.25.0) at 2024-10-13 05:19:29 -0400