2 * Copyright (c) 1982, 1987, 1990 The Regents of the University of California.
3 * Copyright (c) 1992 Terrence R. Lambert.
4 * Copyright (c) 1997 KATO Takenori.
5 * Copyright (c) 2001 Tamotsu Hattori.
6 * Copyright (c) 2001 Mitsuru IWASAKI.
9 * This code is derived from software contributed to Berkeley by
12 * Redistribution and use in source and binary forms, with or without
13 * modification, are permitted provided that the following conditions
15 * 1. Redistributions of source code must retain the above copyright
16 * notice, this list of conditions and the following disclaimer.
17 * 2. Redistributions in binary form must reproduce the above copyright
18 * notice, this list of conditions and the following disclaimer in the
19 * documentation and/or other materials provided with the distribution.
20 * 3. All advertising materials mentioning features or use of this software
21 * must display the following acknowledgement:
22 * This product includes software developed by the University of
23 * California, Berkeley and its contributors.
24 * 4. Neither the name of the University nor the names of its contributors
25 * may be used to endorse or promote products derived from this software
26 * without specific prior written permission.
28 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
29 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
30 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
31 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
32 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
33 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
34 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
35 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
36 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
37 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
40 * from: Id: machdep.c,v 1.193 1996/06/18 01:22:04 bde Exp
41 * $FreeBSD: src/sys/i386/i386/identcpu.c,v 1.80.2.15 2003/04/11 17:06:41 jhb Exp $
42 * $DragonFly: src/sys/platform/pc32/i386/identcpu.c,v 1.24 2008/11/24 13:14:21 swildner Exp $
47 #include <sys/param.h>
48 #include <sys/systm.h>
49 #include <sys/kernel.h>
50 #include <sys/sysctl.h>
53 #include <machine/asmacros.h>
54 #include <machine/clock.h>
55 #include <machine/cputypes.h>
56 #include <machine/segments.h>
57 #include <machine/specialreg.h>
58 #include <machine/md_var.h>
60 #include <machine_base/isa/intr_machdep.h>
62 #define IDENTBLUE_CYRIX486 0
63 #define IDENTBLUE_IBMCPU 1
64 #define IDENTBLUE_CYRIXM2 2
66 /* XXX - should be in header file: */
67 void printcpuinfo(void);
68 void finishidentcpu(void);
69 #if defined(I586_CPU) && defined(CPU_WT_ALLOC)
70 void enable_K5_wt_alloc(void);
71 void enable_K6_wt_alloc(void);
72 void enable_K6_2_wt_alloc(void);
74 void panicifcpuunsupported(void);
76 static void identifycyrix(void);
77 #if defined(I486_CPU) || defined(I586_CPU) || defined(I686_CPU)
78 static void print_AMD_features(void);
80 static void print_AMD_info(void);
81 static void print_AMD_assoc(int i);
82 static void print_transmeta_info(void);
83 static void setup_tmx86_longrun(void);
84 static void print_via_padlock_info(void);
86 int cpu_class = CPUCLASS_386;
87 u_int cpu_exthigh; /* Highest arg to extended CPUID */
88 u_int cyrix_did; /* Device ID of Cyrix CPU */
89 char machine[] = MACHINE;
90 SYSCTL_STRING(_hw, HW_MACHINE, machine, CTLFLAG_RD,
91 machine, 0, "Machine class");
93 static char cpu_model[128];
94 SYSCTL_STRING(_hw, HW_MODEL, model, CTLFLAG_RD,
95 cpu_model, 0, "Machine model");
97 static char cpu_brand[48];
99 #define MAX_ADDITIONAL_INFO 16
101 static const char *additional_cpu_info_ary[MAX_ADDITIONAL_INFO];
102 static u_int additional_cpu_info_count;
104 #define MAX_BRAND_INDEX 23
107 * Brand ID's according to Intel document AP-485, number 241618-31, published
108 * September 2006, page 42.
110 static const char *cpu_brandtable[MAX_BRAND_INDEX + 1] = {
114 "Intel Pentium III Xeon",
116 NULL, /* Unspecified */
117 "Mobile Intel Pentium III-M",
118 "Mobile Intel Celeron",
124 NULL, /* Unspecified */
125 "Mobile Intel Pentium 4-M",
126 "Mobile Intel Celeron",
127 NULL, /* Unspecified */
128 "Mobile Genuine Intel",
130 "Mobile Intel Celeron",
132 "Mobile Genuine Intel",
134 "Mobile Intel Celeron"
137 static struct cpu_nameclass i386_cpus[] = {
138 { "Intel 80286", CPUCLASS_286 }, /* CPU_286 */
139 { "i386SX", CPUCLASS_386 }, /* CPU_386SX */
140 { "i386DX", CPUCLASS_386 }, /* CPU_386 */
141 { "i486SX", CPUCLASS_486 }, /* CPU_486SX */
142 { "i486DX", CPUCLASS_486 }, /* CPU_486 */
143 { "Pentium", CPUCLASS_586 }, /* CPU_586 */
144 { "Cyrix 486", CPUCLASS_486 }, /* CPU_486DLC */
145 { "Pentium Pro", CPUCLASS_686 }, /* CPU_686 */
146 { "Cyrix 5x86", CPUCLASS_486 }, /* CPU_M1SC */
147 { "Cyrix 6x86", CPUCLASS_486 }, /* CPU_M1 */
148 { "Blue Lightning", CPUCLASS_486 }, /* CPU_BLUE */
149 { "Cyrix 6x86MX", CPUCLASS_686 }, /* CPU_M2 */
150 { "NexGen 586", CPUCLASS_386 }, /* CPU_NX586 (XXX) */
151 { "Cyrix 486S/DX", CPUCLASS_486 }, /* CPU_CY486DX */
152 { "Pentium II", CPUCLASS_686 }, /* CPU_PII */
153 { "Pentium III", CPUCLASS_686 }, /* CPU_PIII */
154 { "Pentium 4", CPUCLASS_686 }, /* CPU_P4 */
157 #if defined(I586_CPU) && !defined(NO_F00F_HACK)
158 int has_f00f_bug = 0; /* Initialized so that it can be patched. */
164 #if defined(I486_CPU) || defined(I586_CPU) || defined(I686_CPU)
169 cpu_class = i386_cpus[cpu].cpu_class;
171 strncpy(cpu_model, i386_cpus[cpu].cpu_name, sizeof (cpu_model));
173 #if defined(I486_CPU) || defined(I586_CPU) || defined(I686_CPU)
174 /* Check for extended CPUID information and a processor name. */
176 (strcmp(cpu_vendor, "GenuineIntel") == 0 ||
177 strcmp(cpu_vendor, "AuthenticAMD") == 0 ||
178 strcmp(cpu_vendor, "GenuineTMx86") == 0 ||
179 strcmp(cpu_vendor, "TransmetaCPU") == 0)) {
180 do_cpuid(0x80000000, regs);
181 if (regs[0] >= 0x80000000) {
182 cpu_exthigh = regs[0];
183 if (cpu_exthigh >= 0x80000004) {
185 for (i = 0x80000002; i < 0x80000005; i++) {
187 memcpy(brand, regs, sizeof(regs));
188 brand += sizeof(regs);
194 if (strcmp(cpu_vendor, "GenuineIntel") == 0) {
195 if ((cpu_id & 0xf00) > 0x300) {
200 switch (cpu_id & 0x3000) {
202 strcpy(cpu_model, "Overdrive ");
205 strcpy(cpu_model, "Dual ");
209 switch (cpu_id & 0xf00) {
211 strcat(cpu_model, "i486 ");
212 /* Check the particular flavor of 486 */
213 switch (cpu_id & 0xf0) {
216 strcat(cpu_model, "DX");
219 strcat(cpu_model, "SX");
222 strcat(cpu_model, "DX2");
225 strcat(cpu_model, "SL");
228 strcat(cpu_model, "SX2");
232 "DX2 Write-Back Enhanced");
235 strcat(cpu_model, "DX4");
240 /* Check the particular flavor of 586 */
241 strcat(cpu_model, "Pentium");
242 switch (cpu_id & 0xf0) {
244 strcat(cpu_model, " A-step");
247 strcat(cpu_model, "/P5");
250 strcat(cpu_model, "/P54C");
253 strcat(cpu_model, "/P54T Overdrive");
256 strcat(cpu_model, "/P55C");
259 strcat(cpu_model, "/P54C");
262 strcat(cpu_model, "/P55C (quarter-micron)");
268 #if defined(I586_CPU) && !defined(NO_F00F_HACK)
270 * XXX - If/when Intel fixes the bug, this
271 * should also check the version of the
272 * CPU, not just that it's a Pentium.
278 /* Check the particular flavor of 686 */
279 switch (cpu_id & 0xf0) {
281 strcat(cpu_model, "Pentium Pro A-step");
284 strcat(cpu_model, "Pentium Pro");
290 "Pentium II/Pentium II Xeon/Celeron");
298 "Pentium III/Pentium III Xeon/Celeron");
302 strcat(cpu_model, "Unknown 80686");
307 strcat(cpu_model, "Pentium 4");
311 strcat(cpu_model, "unknown");
316 * If we didn't get a brand name from the extended
317 * CPUID, try to look it up in the brand table.
319 if (cpu_high > 0 && *cpu_brand == '\0') {
320 brand_index = cpu_procinfo & CPUID_BRAND_INDEX;
321 if (brand_index <= MAX_BRAND_INDEX &&
322 cpu_brandtable[brand_index] != NULL)
324 cpu_brandtable[brand_index]);
327 } else if (strcmp(cpu_vendor, "AuthenticAMD") == 0) {
329 * Values taken from AMD Processor Recognition
330 * http://www.amd.com/K6/k6docs/pdf/20734g.pdf
331 * (also describes ``Features'' encodings.
333 strcpy(cpu_model, "AMD ");
334 switch (cpu_id & 0xFF0) {
336 strcat(cpu_model, "Standard Am486DX");
339 strcat(cpu_model, "Enhanced Am486DX2 Write-Through");
342 strcat(cpu_model, "Enhanced Am486DX2 Write-Back");
345 strcat(cpu_model, "Enhanced Am486DX4/Am5x86 Write-Through");
348 strcat(cpu_model, "Enhanced Am486DX4/Am5x86 Write-Back");
351 strcat(cpu_model, "Am5x86 Write-Through");
354 strcat(cpu_model, "Am5x86 Write-Back");
357 strcat(cpu_model, "K5 model 0");
361 strcat(cpu_model, "K5 model 1");
364 strcat(cpu_model, "K5 PR166 (model 2)");
367 strcat(cpu_model, "K5 PR200 (model 3)");
370 strcat(cpu_model, "K6");
373 strcat(cpu_model, "K6 266 (model 1)");
376 strcat(cpu_model, "K6-2");
379 strcat(cpu_model, "K6-III");
382 strcat(cpu_model, "Unknown");
385 #if defined(I586_CPU) && defined(CPU_WT_ALLOC)
386 if ((cpu_id & 0xf00) == 0x500) {
387 if (((cpu_id & 0x0f0) > 0)
388 && ((cpu_id & 0x0f0) < 0x60)
389 && ((cpu_id & 0x00f) > 3))
390 enable_K5_wt_alloc();
391 else if (((cpu_id & 0x0f0) > 0x80)
392 || (((cpu_id & 0x0f0) == 0x80)
393 && (cpu_id & 0x00f) > 0x07))
394 enable_K6_2_wt_alloc();
395 else if ((cpu_id & 0x0f0) > 0x50)
396 enable_K6_wt_alloc();
399 } else if (strcmp(cpu_vendor, "CyrixInstead") == 0) {
400 strcpy(cpu_model, "Cyrix ");
401 switch (cpu_id & 0xff0) {
403 strcat(cpu_model, "MediaGX");
406 strcat(cpu_model, "6x86");
409 cpu_class = CPUCLASS_586;
410 strcat(cpu_model, "GXm");
413 strcat(cpu_model, "6x86MX");
417 * Even though CPU supports the cpuid
418 * instruction, it can be disabled.
419 * Therefore, this routine supports all Cyrix
422 switch (cyrix_did & 0xf0) {
424 switch (cyrix_did & 0x0f) {
426 strcat(cpu_model, "486SLC");
429 strcat(cpu_model, "486DLC");
432 strcat(cpu_model, "486SLC2");
435 strcat(cpu_model, "486DLC2");
438 strcat(cpu_model, "486SRx");
441 strcat(cpu_model, "486DRx");
444 strcat(cpu_model, "486SRx2");
447 strcat(cpu_model, "486DRx2");
450 strcat(cpu_model, "486SRu");
453 strcat(cpu_model, "486DRu");
456 strcat(cpu_model, "486SRu2");
459 strcat(cpu_model, "486DRu2");
462 strcat(cpu_model, "Unknown");
467 switch (cyrix_did & 0x0f) {
469 strcat(cpu_model, "486S");
472 strcat(cpu_model, "486S2");
475 strcat(cpu_model, "486Se");
478 strcat(cpu_model, "486S2e");
481 strcat(cpu_model, "486DX");
484 strcat(cpu_model, "486DX2");
487 strcat(cpu_model, "486DX4");
490 strcat(cpu_model, "Unknown");
495 if ((cyrix_did & 0x0f) < 8)
496 strcat(cpu_model, "6x86"); /* Where did you get it? */
498 strcat(cpu_model, "5x86");
501 strcat(cpu_model, "6x86");
504 if ((cyrix_did & 0xf000) == 0x3000) {
505 cpu_class = CPUCLASS_586;
506 strcat(cpu_model, "GXm");
508 strcat(cpu_model, "MediaGX");
511 strcat(cpu_model, "6x86MX");
514 switch (cyrix_did & 0x0f) {
516 strcat(cpu_model, "Overdrive CPU");
519 strcpy(cpu_model, "Texas Instruments 486SXL");
522 strcat(cpu_model, "486SLC/DLC");
525 strcat(cpu_model, "Unknown");
530 strcat(cpu_model, "Unknown");
535 } else if (strcmp(cpu_vendor, "RiseRiseRise") == 0) {
536 strcpy(cpu_model, "Rise ");
537 switch (cpu_id & 0xff0) {
539 strcat(cpu_model, "mP6");
542 strcat(cpu_model, "Unknown");
544 } else if (strcmp(cpu_vendor, "CentaurHauls") == 0) {
545 switch (cpu_id & 0xff0) {
547 strcpy(cpu_model, "IDT WinChip C6");
551 strcpy(cpu_model, "IDT WinChip 2");
554 strcpy(cpu_model, "VIA C3 Samuel");
558 strcpy(cpu_model, "VIA C3 Ezra");
560 strcpy(cpu_model, "VIA C3 Samuel 2");
563 strcpy(cpu_model, "VIA C3 Ezra-T");
566 strcpy(cpu_model, "VIA C3 Nehemiah");
570 strcpy(cpu_model, "VIA C7 Esther");
573 strcpy(cpu_model, "VIA Nano");
576 strcpy(cpu_model, "VIA/IDT Unknown");
578 } else if (strcmp(cpu_vendor, "IBM") == 0) {
579 strcpy(cpu_model, "Blue Lightning CPU");
583 * Replace cpu_model with cpu_brand minus leading spaces if
587 while (*brand == ' ')
590 strcpy(cpu_model, brand);
594 kprintf("%s (", cpu_model);
602 #if defined(I486_CPU)
605 /* bzero = i486_bzero; */
608 #if defined(I586_CPU)
610 kprintf("%lld.%02lld-MHz ",
611 (tsc_frequency + 4999LL) / 1000000LL,
612 ((tsc_frequency + 4999LL) / 10000LL) % 100LL);
616 #if defined(I686_CPU)
618 kprintf("%lld.%02lld-MHz ",
619 (tsc_frequency + 4999LL) / 1000000LL,
620 ((tsc_frequency + 4999LL) / 10000LL) % 100LL);
625 kprintf("Unknown"); /* will panic below... */
627 kprintf("-class CPU)\n");
628 #if defined(I486_CPU) || defined(I586_CPU) || defined(I686_CPU)
630 kprintf(" Origin = \"%s\"",cpu_vendor);
632 kprintf(" Id = 0x%x", cpu_id);
634 if (strcmp(cpu_vendor, "GenuineIntel") == 0 ||
635 strcmp(cpu_vendor, "AuthenticAMD") == 0 ||
636 strcmp(cpu_vendor, "RiseRiseRise") == 0 ||
637 strcmp(cpu_vendor, "CentaurHauls") == 0 ||
638 ((strcmp(cpu_vendor, "CyrixInstead") == 0) &&
639 ((cpu_id & 0xf00) > 0x500))) {
640 kprintf(" Stepping = %u", cpu_id & 0xf);
641 if (strcmp(cpu_vendor, "CyrixInstead") == 0)
642 kprintf(" DIR=0x%04x", cyrix_did);
645 * Here we should probably set up flags indicating
646 * whether or not various features are available.
647 * The interesting ones are probably VME, PSE, PAE,
648 * and PGE. The code already assumes without bothering
649 * to check that all CPUs >= Pentium have a TSC and
652 kprintf("\n Features=0x%b", cpu_feature,
654 "\001FPU" /* Integral FPU */
655 "\002VME" /* Extended VM86 mode support */
656 "\003DE" /* Debugging Extensions (CR4.DE) */
657 "\004PSE" /* 4MByte page tables */
658 "\005TSC" /* Timestamp counter */
659 "\006MSR" /* Machine specific registers */
660 "\007PAE" /* Physical address extension */
661 "\010MCE" /* Machine Check support */
662 "\011CX8" /* CMPEXCH8 instruction */
663 "\012APIC" /* SMP local APIC */
664 "\013oldMTRR" /* Previous implementation of MTRR */
665 "\014SEP" /* Fast System Call */
666 "\015MTRR" /* Memory Type Range Registers */
667 "\016PGE" /* PG_G (global bit) support */
668 "\017MCA" /* Machine Check Architecture */
669 "\020CMOV" /* CMOV instruction */
670 "\021PAT" /* Page attributes table */
671 "\022PSE36" /* 36 bit address space support */
672 "\023PN" /* Processor Serial number */
673 "\024CLFLUSH" /* Has the CLFLUSH instruction */
675 "\026DTS" /* Debug Trace Store */
676 "\027ACPI" /* ACPI support */
677 "\030MMX" /* MMX instructions */
678 "\031FXSR" /* FXSAVE/FXRSTOR */
679 "\032SSE" /* Streaming SIMD Extensions */
680 "\033SSE2" /* Streaming SIMD Extensions #2 */
681 "\034SS" /* Self snoop */
682 "\035HTT" /* Hyperthreading (see EBX bit 16-23) */
683 "\036TM" /* Thermal Monitor clock slowdown */
684 "\037IA64" /* CPU can execute IA64 instructions */
685 "\040PBE" /* Pending Break Enable */
688 if (cpu_feature2 != 0) {
689 kprintf("\n Features2=0x%b", cpu_feature2,
691 "\001SSE3" /* SSE3 */
693 "\003DTES64" /* 64-bit Debug Trace */
694 "\004MON" /* MONITOR/MWAIT Instructions */
695 "\005DS_CPL" /* CPL Qualified Debug Store */
696 "\006VMX" /* Virtual Machine Extensions */
697 "\007SMX" /* Safer Mode Extensions */
698 "\010EST" /* Enhanced SpeedStep */
699 "\011TM2" /* Thermal Monitor 2 */
700 "\012SSSE3" /* SSSE3 */
701 "\013CNXT-ID" /* L1 context ID available */
704 "\016CX16" /* CMPXCHG16B Instruction */
705 "\017xTPR" /* Send Task Priority Messages*/
706 "\020PDCM" /* Perf/Debug Capability MSR */
709 "\023DCA" /* Direct Cache Access */
712 "\026x2APIC" /* xAPIC Extensions */
713 "\027MOVBE" /* MOVBE instruction */
725 if (strcmp(cpu_vendor, "CentaurHauls") == 0)
726 print_via_padlock_info();
729 * If this CPU supports hyperthreading then mention
730 * the number of logical CPU's it contains.
732 if (cpu_feature & CPUID_HTT &&
733 (cpu_procinfo & CPUID_HTT_CORES) >> 16 > 1)
734 kprintf("\n Hyperthreading: %d logical CPUs",
735 (cpu_procinfo & CPUID_HTT_CORES) >> 16);
737 if (strcmp(cpu_vendor, "AuthenticAMD") == 0 &&
738 cpu_exthigh >= 0x80000001)
739 print_AMD_features();
740 } else if (strcmp(cpu_vendor, "CyrixInstead") == 0) {
741 kprintf(" DIR=0x%04x", cyrix_did);
742 kprintf(" Stepping=%u", (cyrix_did & 0xf000) >> 12);
743 kprintf(" Revision=%u", (cyrix_did & 0x0f00) >> 8);
744 #ifndef CYRIX_CACHE_REALLY_WORKS
745 if (cpu == CPU_M1 && (cyrix_did & 0xff00) < 0x1700)
746 kprintf("\n CPU cache: write-through mode");
749 /* Avoid ugly blank lines: only print newline when we have to. */
750 if (*cpu_vendor || cpu_id)
754 if (strcmp(cpu_vendor, "GenuineTMx86") == 0 ||
755 strcmp(cpu_vendor, "TransmetaCPU") == 0) {
756 setup_tmx86_longrun();
759 for (i = 0; i < additional_cpu_info_count; ++i) {
760 kprintf(" %s\n", additional_cpu_info_ary[i]);
766 if (strcmp(cpu_vendor, "AuthenticAMD") == 0)
768 else if (strcmp(cpu_vendor, "GenuineTMx86") == 0 ||
769 strcmp(cpu_vendor, "TransmetaCPU") == 0)
770 print_transmeta_info();
774 * XXX - Do PPro CPUID level=2 stuff here?
776 * No, but maybe in a print_Intel_info() function called from here.
782 panicifcpuunsupported(void)
785 #if !defined(I486_CPU) && !defined(I586_CPU) && !defined(I686_CPU)
786 #error This kernel is not configured for one of the supported CPUs
789 * Now that we have told the user what they have,
790 * let them know if that machine type isn't configured.
794 * A 286 and 386 should not make it this far, anyway.
798 #if !defined(I486_CPU)
801 #if !defined(I586_CPU)
804 #if !defined(I686_CPU)
807 panic("CPU class not configured");
814 static volatile u_int trap_by_rdmsr;
817 * Special exception 6 handler.
818 * The rdmsr instruction generates invalid opcodes fault on 486-class
819 * Cyrix CPU. Stacked eip register points the rdmsr instruction in the
820 * function identblue() when this handler is called. Stacked eip should
827 " .p2align 2,0x90 \n"
828 " .type " __XSTRING(CNAME(bluetrap6)) ",@function \n"
829 __XSTRING(CNAME(bluetrap6)) ": \n"
831 " movl $0xa8c1d," __XSTRING(CNAME(trap_by_rdmsr)) " \n"
832 " addl $2, (%esp) # I know rdmsr is a 2-bytes instruction. \n"
837 * Special exception 13 handler.
838 * Accessing non-existent MSR generates general protection fault.
840 inthand_t bluetrap13;
844 " .p2align 2,0x90 \n"
845 " .type " __XSTRING(CNAME(bluetrap13)) ",@function \n"
846 __XSTRING(CNAME(bluetrap13)) ": \n"
848 " movl $0xa89c4," __XSTRING(CNAME(trap_by_rdmsr)) " \n"
849 " popl %eax # discard errorcode. \n"
850 " addl $2, (%esp) # I know rdmsr is a 2-bytes instruction. \n"
855 * Distinguish IBM Blue Lightning CPU from Cyrix CPUs that does not
856 * support cpuid instruction. This function should be called after
857 * loading interrupt descriptor table register.
859 * I don't like this method that handles fault, but I couldn't get
860 * information for any other methods. Does blue giant know?
869 * Cyrix 486-class CPU does not support rdmsr instruction.
870 * The rdmsr instruction generates invalid opcode fault, and exception
871 * will be trapped by bluetrap6() on Cyrix 486-class CPU. The
872 * bluetrap6() set the magic number to trap_by_rdmsr.
874 setidt(6, bluetrap6, SDT_SYS386TGT, SEL_KPL, GSEL(GCODE_SEL, SEL_KPL));
877 * Certain BIOS disables cpuid instruction of Cyrix 6x86MX CPU.
878 * In this case, rdmsr generates general protection fault, and
879 * exception will be trapped by bluetrap13().
881 setidt(13, bluetrap13, SDT_SYS386TGT, SEL_KPL, GSEL(GCODE_SEL, SEL_KPL));
883 rdmsr(0x1002); /* Cyrix CPU generates fault. */
885 if (trap_by_rdmsr == 0xa8c1d)
886 return IDENTBLUE_CYRIX486;
887 else if (trap_by_rdmsr == 0xa89c4)
888 return IDENTBLUE_CYRIXM2;
889 return IDENTBLUE_IBMCPU;
894 * identifycyrix() set lower 16 bits of cyrix_did as follows:
896 * F E D C B A 9 8 7 6 5 4 3 2 1 0
897 * +-------+-------+---------------+
898 * | SID | RID | Device ID |
899 * | (DIR 1) | (DIR 0) |
900 * +-------+-------+---------------+
905 int ccr2_test = 0, dir_test = 0;
910 ccr2 = read_cyrix_reg(CCR2);
911 write_cyrix_reg(CCR2, ccr2 ^ CCR2_LOCK_NW);
912 read_cyrix_reg(CCR2);
913 if (read_cyrix_reg(CCR2) != ccr2)
915 write_cyrix_reg(CCR2, ccr2);
917 ccr3 = read_cyrix_reg(CCR3);
918 write_cyrix_reg(CCR3, ccr3 ^ CCR3_MAPEN3);
919 read_cyrix_reg(CCR3);
920 if (read_cyrix_reg(CCR3) != ccr3)
921 dir_test = 1; /* CPU supports DIRs. */
922 write_cyrix_reg(CCR3, ccr3);
925 /* Device ID registers are available. */
926 cyrix_did = read_cyrix_reg(DIR1) << 8;
927 cyrix_did += read_cyrix_reg(DIR0);
928 } else if (ccr2_test)
929 cyrix_did = 0x0010; /* 486S A-step */
931 cyrix_did = 0x00ff; /* Old 486SLC/DLC and TI486SXLC/SXL */
937 * Final stage of CPU identification. -- Should I check TI?
946 if (strcmp(cpu_vendor, "CyrixInstead") == 0) {
947 if (cpu == CPU_486) {
949 * These conditions are equivalent to:
950 * - CPU does not support cpuid instruction.
951 * - Cyrix/IBM CPU is detected.
953 isblue = identblue();
954 if (isblue == IDENTBLUE_IBMCPU) {
955 strcpy(cpu_vendor, "IBM");
960 switch (cpu_id & 0xf00) {
963 * Cyrix's datasheet does not describe DIRs.
964 * Therefor, I assume it does not have them
965 * and use the result of the cpuid instruction.
966 * XXX they seem to have it for now at least. -Peter
974 * This routine contains a trick.
975 * Don't check (cpu_id & 0x00f0) == 0x50 to detect M2, now.
977 switch (cyrix_did & 0x00f0) {
986 if ((cyrix_did & 0x000f) < 8)
999 /* M2 and later CPUs are treated as M2. */
1003 * enable cpuid instruction.
1005 ccr3 = read_cyrix_reg(CCR3);
1006 write_cyrix_reg(CCR3, CCR3_MAPEN0);
1007 write_cyrix_reg(CCR4, read_cyrix_reg(CCR4) | CCR4_CPUID);
1008 write_cyrix_reg(CCR3, ccr3);
1011 cpu_high = regs[0]; /* eax */
1013 cpu_id = regs[0]; /* eax */
1014 cpu_feature = regs[3]; /* edx */
1018 } else if (cpu == CPU_486 && *cpu_vendor == '\0') {
1020 * There are BlueLightning CPUs that do not change
1021 * undefined flags by dividing 5 by 2. In this case,
1022 * the CPU identification routine in locore.s leaves
1023 * cpu_vendor null string and puts CPU_486 into the
1026 isblue = identblue();
1027 if (isblue == IDENTBLUE_IBMCPU) {
1028 strcpy(cpu_vendor, "IBM");
1036 print_AMD_assoc(int i)
1039 kprintf(", fully associative\n");
1041 kprintf(", %d-way associative\n", i);
1045 * #31116 Rev 3.06 section 3.9
1046 * CPUID Fn8000_0006 L2/L3 Cache and L2 TLB Identifiers
1049 print_AMD_L2L3_assoc(int i)
1051 static const char *assoc_str[] = {
1053 [0x1] = "direct mapped",
1054 [0x2] = "2-way associative",
1055 [0x4] = "4-way associative",
1056 [0x6] = "8-way associative",
1057 [0x8] = "16-way associative",
1058 [0xa] = "32-way associative",
1059 [0xb] = "48-way associative",
1060 [0xc] = "64-way associative",
1061 [0xd] = "96-way associative",
1062 [0xe] = "128-way associative",
1063 [0xf] = "fully associative"
1067 if (assoc_str[i] == NULL)
1068 kprintf(", unknown associative\n");
1070 kprintf(", %s\n", assoc_str[i]);
1074 print_AMD_info(void)
1078 if (cpu_exthigh >= 0x80000005) {
1081 do_cpuid(0x80000005, regs);
1082 kprintf("Data TLB: %d entries", (regs[1] >> 16) & 0xff);
1083 print_AMD_assoc(regs[1] >> 24);
1084 kprintf("Instruction TLB: %d entries", regs[1] & 0xff);
1085 print_AMD_assoc((regs[1] >> 8) & 0xff);
1086 kprintf("L1 data cache: %d kbytes", regs[2] >> 24);
1087 kprintf(", %d bytes/line", regs[2] & 0xff);
1088 kprintf(", %d lines/tag", (regs[2] >> 8) & 0xff);
1089 print_AMD_assoc((regs[2] >> 16) & 0xff);
1090 kprintf("L1 instruction cache: %d kbytes", regs[3] >> 24);
1091 kprintf(", %d bytes/line", regs[3] & 0xff);
1092 kprintf(", %d lines/tag", (regs[3] >> 8) & 0xff);
1093 print_AMD_assoc((regs[3] >> 16) & 0xff);
1094 if (cpu_exthigh >= 0x80000006) { /* K6-III, or later */
1095 do_cpuid(0x80000006, regs);
1097 * Report right L2 cache size on Duron rev. A0.
1099 if ((cpu_id & 0xFF0) == 0x630)
1100 kprintf("L2 internal cache: 64 kbytes");
1102 kprintf("L2 internal cache: %d kbytes",
1105 kprintf(", %d bytes/line", regs[2] & 0xff);
1106 kprintf(", %d lines/tag", (regs[2] >> 8) & 0x0f);
1107 print_AMD_L2L3_assoc((regs[2] >> 12) & 0x0f);
1110 * #31116 Rev 3.06 section 2.16.2:
1111 * ... If EDX[31:16] is not zero then the processor
1112 * includes an L3. ...
1114 if ((regs[3] & 0xffff0000) != 0) {
1115 kprintf("L3 shared cache: %d kbytes",
1116 (regs[3] >> 18) * 512);
1117 kprintf(", %d bytes/line", regs[3] & 0xff);
1118 kprintf(", %d lines/tag", (regs[3] >> 8) & 0x0f);
1119 print_AMD_L2L3_assoc((regs[3] >> 12) & 0x0f);
1123 if (((cpu_id & 0xf00) == 0x500)
1124 && (((cpu_id & 0x0f0) > 0x80)
1125 || (((cpu_id & 0x0f0) == 0x80)
1126 && (cpu_id & 0x00f) > 0x07))) {
1127 /* K6-2(new core [Stepping 8-F]), K6-III or later */
1128 amd_whcr = rdmsr(0xc0000082);
1129 if (!(amd_whcr & (0x3ff << 22))) {
1130 kprintf("Write Allocate Disable\n");
1132 kprintf("Write Allocate Enable Limit: %dM bytes\n",
1133 (u_int32_t)((amd_whcr & (0x3ff << 22)) >> 22) * 4);
1134 kprintf("Write Allocate 15-16M bytes: %s\n",
1135 (amd_whcr & (1 << 16)) ? "Enable" : "Disable");
1137 } else if (((cpu_id & 0xf00) == 0x500)
1138 && ((cpu_id & 0x0f0) > 0x50)) {
1139 /* K6, K6-2(old core) */
1140 amd_whcr = rdmsr(0xc0000082);
1141 if (!(amd_whcr & (0x7f << 1))) {
1142 kprintf("Write Allocate Disable\n");
1144 kprintf("Write Allocate Enable Limit: %dM bytes\n",
1145 (u_int32_t)((amd_whcr & (0x7f << 1)) >> 1) * 4);
1146 kprintf("Write Allocate 15-16M bytes: %s\n",
1147 (amd_whcr & 0x0001) ? "Enable" : "Disable");
1148 kprintf("Hardware Write Allocate Control: %s\n",
1149 (amd_whcr & 0x0100) ? "Enable" : "Disable");
1154 #if defined(I486_CPU) || defined(I586_CPU) || defined(I686_CPU)
1156 print_AMD_features(void)
1161 * Values taken from AMD Processor Recognition
1162 * http://www.amd.com/products/cpg/athlon/techdocs/pdf/20734.pdf
1164 do_cpuid(0x80000001, regs);
1165 kprintf("\n AMD Features=0x%b", regs[3] &~ cpu_feature,
1167 "\001FPU" /* Integral FPU */
1168 "\002VME" /* Extended VM86 mode support */
1169 "\003DE" /* Debug extensions */
1170 "\004PSE" /* 4MByte page tables */
1171 "\005TSC" /* Timestamp counter */
1172 "\006MSR" /* Machine specific registers */
1173 "\007PAE" /* Physical address extension */
1174 "\010MCE" /* Machine Check support */
1175 "\011CX8" /* CMPEXCH8 instruction */
1176 "\012APIC" /* SMP local APIC */
1178 "\014SYSCALL" /* SYSENTER/SYSEXIT instructions */
1179 "\015MTRR" /* Memory Type Range Registers */
1180 "\016PGE" /* PG_G (global bit) support */
1181 "\017MCA" /* Machine Check Architecture */
1182 "\020ICMOV" /* CMOV instruction */
1183 "\021PAT" /* Page attributes table */
1184 "\022PGE36" /* 36 bit address space support */
1185 "\023RSVD" /* Reserved, unknown */
1186 "\024MP" /* Multiprocessor Capable */
1187 "\025NX" /* No-execute page protection */
1189 "\027AMIE" /* AMD MMX Instruction Extensions */
1191 "\031FXSAVE" /* FXSAVE/FXRSTOR */
1194 "\034RDTSCP" /* RDTSCP instruction */
1196 "\036LM" /* Long mode */
1197 "\037DSP" /* AMD 3DNow! Instruction Extensions */
1204 * Transmeta Crusoe LongRun Support by Tamotsu Hattori.
1207 #define MSR_TMx86_LONGRUN 0x80868010
1208 #define MSR_TMx86_LONGRUN_FLAGS 0x80868011
1210 #define LONGRUN_MODE_MASK(x) ((x) & 0x000000007f)
1211 #define LONGRUN_MODE_RESERVED(x) ((x) & 0xffffff80)
1212 #define LONGRUN_MODE_WRITE(x, y) (LONGRUN_MODE_RESERVED(x) | LONGRUN_MODE_MASK(y))
1214 #define LONGRUN_MODE_MINFREQUENCY 0x00
1215 #define LONGRUN_MODE_ECONOMY 0x01
1216 #define LONGRUN_MODE_PERFORMANCE 0x02
1217 #define LONGRUN_MODE_MAXFREQUENCY 0x03
1218 #define LONGRUN_MODE_UNKNOWN 0x04
1219 #define LONGRUN_MODE_MAX 0x04
1226 u_int32_t longrun_modes[LONGRUN_MODE_MAX][3] = {
1227 /* MSR low, MSR high, flags bit0 */
1228 { 0, 0, 0}, /* LONGRUN_MODE_MINFREQUENCY */
1229 { 0, 100, 0}, /* LONGRUN_MODE_ECONOMY */
1230 { 0, 100, 1}, /* LONGRUN_MODE_PERFORMANCE */
1231 { 100, 100, 1}, /* LONGRUN_MODE_MAXFREQUENCY */
1235 tmx86_get_longrun_mode(void)
1237 union msrinfo msrinfo;
1238 u_int low, high, flags, mode;
1242 msrinfo.msr = rdmsr(MSR_TMx86_LONGRUN);
1243 low = LONGRUN_MODE_MASK(msrinfo.regs[0]);
1244 high = LONGRUN_MODE_MASK(msrinfo.regs[1]);
1245 flags = rdmsr(MSR_TMx86_LONGRUN_FLAGS) & 0x01;
1247 for (mode = 0; mode < LONGRUN_MODE_MAX; mode++) {
1248 if (low == longrun_modes[mode][0] &&
1249 high == longrun_modes[mode][1] &&
1250 flags == longrun_modes[mode][2]) {
1254 mode = LONGRUN_MODE_UNKNOWN;
1261 tmx86_get_longrun_status(u_int * frequency, u_int * voltage, u_int * percentage)
1267 do_cpuid(0x80860007, regs);
1268 *frequency = regs[0];
1270 *percentage = regs[2];
1277 tmx86_set_longrun_mode(u_int mode)
1279 union msrinfo msrinfo;
1281 if (mode >= LONGRUN_MODE_UNKNOWN) {
1287 /* Write LongRun mode values to Model Specific Register. */
1288 msrinfo.msr = rdmsr(MSR_TMx86_LONGRUN);
1289 msrinfo.regs[0] = LONGRUN_MODE_WRITE(msrinfo.regs[0],
1290 longrun_modes[mode][0]);
1291 msrinfo.regs[1] = LONGRUN_MODE_WRITE(msrinfo.regs[1],
1292 longrun_modes[mode][1]);
1293 wrmsr(MSR_TMx86_LONGRUN, msrinfo.msr);
1295 /* Write LongRun mode flags to Model Specific Register. */
1296 msrinfo.msr = rdmsr(MSR_TMx86_LONGRUN_FLAGS);
1297 msrinfo.regs[0] = (msrinfo.regs[0] & ~0x01) | longrun_modes[mode][2];
1298 wrmsr(MSR_TMx86_LONGRUN_FLAGS, msrinfo.msr);
1304 static u_int crusoe_longrun;
1305 static u_int crusoe_frequency;
1306 static u_int crusoe_voltage;
1307 static u_int crusoe_percentage;
1308 static struct sysctl_ctx_list crusoe_sysctl_ctx;
1309 static struct sysctl_oid *crusoe_sysctl_tree;
1312 tmx86_longrun_sysctl(SYSCTL_HANDLER_ARGS)
1317 crusoe_longrun = tmx86_get_longrun_mode();
1318 mode = crusoe_longrun;
1319 error = sysctl_handle_int(oidp, &mode, 0, req);
1320 if (error || !req->newptr) {
1323 if (mode >= LONGRUN_MODE_UNKNOWN) {
1327 if (crusoe_longrun != mode) {
1328 crusoe_longrun = mode;
1329 tmx86_set_longrun_mode(crusoe_longrun);
1336 tmx86_status_sysctl(SYSCTL_HANDLER_ARGS)
1341 tmx86_get_longrun_status(&crusoe_frequency,
1342 &crusoe_voltage, &crusoe_percentage);
1343 val = *(u_int *)oidp->oid_arg1;
1344 error = sysctl_handle_int(oidp, &val, 0, req);
1349 setup_tmx86_longrun(void)
1351 static int done = 0;
1357 sysctl_ctx_init(&crusoe_sysctl_ctx);
1358 crusoe_sysctl_tree = SYSCTL_ADD_NODE(&crusoe_sysctl_ctx,
1359 SYSCTL_STATIC_CHILDREN(_hw), OID_AUTO,
1360 "crusoe", CTLFLAG_RD, 0,
1361 "Transmeta Crusoe LongRun support");
1362 SYSCTL_ADD_PROC(&crusoe_sysctl_ctx, SYSCTL_CHILDREN(crusoe_sysctl_tree),
1363 OID_AUTO, "longrun", CTLTYPE_INT | CTLFLAG_RW,
1364 &crusoe_longrun, 0, tmx86_longrun_sysctl, "I",
1365 "LongRun mode [0-3]");
1366 SYSCTL_ADD_PROC(&crusoe_sysctl_ctx, SYSCTL_CHILDREN(crusoe_sysctl_tree),
1367 OID_AUTO, "frequency", CTLTYPE_INT | CTLFLAG_RD,
1368 &crusoe_frequency, 0, tmx86_status_sysctl, "I",
1369 "Current frequency (MHz)");
1370 SYSCTL_ADD_PROC(&crusoe_sysctl_ctx, SYSCTL_CHILDREN(crusoe_sysctl_tree),
1371 OID_AUTO, "voltage", CTLTYPE_INT | CTLFLAG_RD,
1372 &crusoe_voltage, 0, tmx86_status_sysctl, "I",
1373 "Current voltage (mV)");
1374 SYSCTL_ADD_PROC(&crusoe_sysctl_ctx, SYSCTL_CHILDREN(crusoe_sysctl_tree),
1375 OID_AUTO, "percentage", CTLTYPE_INT | CTLFLAG_RD,
1376 &crusoe_percentage, 0, tmx86_status_sysctl, "I",
1377 "Processing performance (%)");
1381 print_transmeta_info(void)
1383 u_int regs[4], nreg = 0;
1385 do_cpuid(0x80860000, regs);
1387 if (nreg >= 0x80860001) {
1388 do_cpuid(0x80860001, regs);
1389 kprintf(" Processor revision %u.%u.%u.%u\n",
1390 (regs[1] >> 24) & 0xff,
1391 (regs[1] >> 16) & 0xff,
1392 (regs[1] >> 8) & 0xff,
1395 if (nreg >= 0x80860002) {
1396 do_cpuid(0x80860002, regs);
1397 kprintf(" Code Morphing Software revision %u.%u.%u-%u-%u\n",
1398 (regs[1] >> 24) & 0xff,
1399 (regs[1] >> 16) & 0xff,
1400 (regs[1] >> 8) & 0xff,
1404 if (nreg >= 0x80860006) {
1406 do_cpuid(0x80860003, (u_int*) &info[0]);
1407 do_cpuid(0x80860004, (u_int*) &info[16]);
1408 do_cpuid(0x80860005, (u_int*) &info[32]);
1409 do_cpuid(0x80860006, (u_int*) &info[48]);
1411 kprintf(" %s\n", info);
1414 crusoe_longrun = tmx86_get_longrun_mode();
1415 tmx86_get_longrun_status(&crusoe_frequency,
1416 &crusoe_voltage, &crusoe_percentage);
1417 kprintf(" LongRun mode: %d <%dMHz %dmV %d%%>\n", crusoe_longrun,
1418 crusoe_frequency, crusoe_voltage, crusoe_percentage);
1422 additional_cpu_info(const char *line)
1426 if ((i = additional_cpu_info_count) < MAX_ADDITIONAL_INFO) {
1427 additional_cpu_info_ary[i] = line;
1428 ++additional_cpu_info_count;
1433 print_via_padlock_info(void)
1437 /* Check for supported models. */
1438 switch (cpu_id & 0xff0) {
1440 if ((cpu_id & 0xf) < 3)
1450 do_cpuid(0xc0000000, regs);
1451 if (regs[0] >= 0xc0000001)
1452 do_cpuid(0xc0000001, regs);
1456 kprintf("\n VIA Padlock Features=0x%b", regs[3],
1460 "\011AES-CTR" /* ACE2 */
1461 "\013SHA1,SHA256" /* PHE */