CPUID.c Example
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/* Intel and AMD x86 CPUID display program v 3.3 (1 Jan 2002)
* Copyright 2002 Phil Karn, KA9Q
* Updated 24 Apr 2001 to latest Intel CPUID spec
* Updated 22 Dec 2001 to decode Intel flag 28, hyper threading
* Updated 1 Jan 2002 to cover AMD Duron, Athlon
* May be used under the terms of the GNU Public License (GPL)
* Reference documents:
* ftp://download.intel.com/design/pro/applnots/24161809.pdf (AP-485)
* http://developer.intel.com/design/Pentium4/manuals/24547103.pdf
* http://developer.intel.com/design/pentiumiii/applnots/24512501.pdf (AP-909)
* http://www.amd.com/us-en/assets/content_type/white_papers_and_tech_docs/20734.pdf
*
*/
#include <stdio.h>
void decode_intel_tlb(int);
void decode_cyrix_tlb(int);
void dointel(int),doamd(int),docyrix(int);
void printregs(int eax,int ebx,int ecx,int edx);
#define MAXBRANDS 9
char *Brands[MAXBRANDS] = {
"brand 0",
"Celeron processor",
"Pentium III processor",
"Intel Pentium III Xeon processor",
"brand 4",
"brand 5",
"brand 6",
"brand 7",
"Intel Pentium 4 processor",
};
#define cpuid(in,a,b,c,d)\
asm("cpuid": "=a" (a), "=b" (b), "=c" (c), "=d" (d) : "a" (in));
int main(){
int i;
unsigned long li,maxi,maxei,ebx,ecx,edx,unused;
/* Insert code here to test if CPUID instruction is available */
/* Dump all the CPUID results in raw hex */
cpuid(0,maxi,unused,unused,unused);
maxi &= 0xffff; /* The high-order word is non-zero on some Cyrix CPUs */
printf(" eax in eax ebx ecx edx\n");
for(i=0;i<=maxi;i++){
unsigned long eax,ebx,ecx,edx;
cpuid(i,eax,ebx,ecx,edx);
printf("%08x %08lx %08lx %08lx %08lx\n",i,eax,ebx,ecx,edx);
}
cpuid(0x80000000,maxei,unused,unused,unused);
for(li=0x80000000;li<=maxei;li++){
unsigned long eax,ebx,ecx,edx;
cpuid(li,eax,ebx,ecx,edx);
printf("%08lx %08lx %08lx %08lx %08lx\n",li,eax,ebx,ecx,edx);
}
printf("\n");
/* Vendor ID and max CPUID level supported */
cpuid(0,unused,ebx,ecx,edx);
printf("Vendor ID: \"");
for(i=0;i<4;i++)
putchar(ebx >> (8*i));
for(i=0;i<4;i++)
putchar(edx >> (8*i));
for(i=0;i<4;i++)
putchar(ecx >> (8*i));
printf("\"; CPUID level %ld\n\n",maxi);
switch(ebx){
case 0x756e6547: /* Intel */
dointel(maxi);
break;
case 0x68747541: /* AMD */
doamd(maxi);
break;
case 0x69727943: /* Cyrix */
docyrix(maxi);
break;
default:
printf("Unknown vendor\n");
break;
}
exit(0);
}
char *Intel_feature_flags[] = {
"FPU Floating Point Unit",
"VME Virtual 8086 Mode Enhancements",
"DE Debugging Extensions",
"PSE Page Size Extensions",
"TSC Time Stamp Counter",
"MSR Model Specific Registers",
"PAE Physical Address Extension",
"MCE Machine Check Exception",
"CX8 COMPXCHG8B Instruction",
"APIC On-chip Advanced Programmable Interrupt Controller present and enabled",
"10 Reserved",
"SEP Fast System Call",
"MTRR Memory Type Range Registers",
"PGE PTE Global Flag",
"MCA Machine Check Architecture",
"CMOV Conditional Move and Compare Instructions",
"FGPAT Page Attribute Table",
"PSE-36 36-bit Page Size Extension",
"PN Processor Serial Number present and enabled",
"CLFSH CFLUSH instruction",
"20 reserved",
"DS Debug store",
"ACPI Thermal Monitor and Clock Ctrl",
"MMX MMX instruction set",
"FXSR Fast FP/MMX Streaming SIMD Extensions save/restore",
"SSE Streaming SIMD Extensions instruction set",
"SSE2 SSE2 extensions",
"SS Self Snoop",
"HT Hyper Threading",
"TM Thermal monitor",
"30 reserved",
"31 reserved",
};
/* Intel-specific information */
void dointel(int maxi){
printf("Intel-specific functions:\n");
if(maxi >= 1){
/* Family/model/type etc */
int clf,apic_id,feature_flags;
int extended_model = -1,extended_family = -1;
unsigned long eax,ebx,edx,unused;
int stepping,model,family,type,reserved,brand,siblings;
int i;
cpuid(1,eax,ebx,unused,edx);
printf("Version %08lx:\n",eax);
stepping = eax & 0xf;
model = (eax >> 4) & 0xf;
family = (eax >> 8) & 0xf;
type = (eax >> 12) & 0x3;
reserved = eax >> 14;
clf = (ebx >> 8) & 0xff;
apic_id = (ebx >> 24) & 0xff;
siblings = (ebx >> 16) & 0xff;
feature_flags = edx;
printf("Type %d - ",type);
switch(type){
case 0:
printf("Original OEM");
break;
case 1:
printf("Overdrive");
break;
case 2:
printf("Dual-capable");
break;
case 3:
printf("Reserved");
break;
}
printf("\n");
printf("Family %d - ",family);
switch(family){
case 3:
printf("i386");
break;
case 4:
printf("i486");
break;
case 5:
printf("Pentium");
break;
case 6:
printf("Pentium Pro");
break;
case 15:
printf("Pentium 4");
}
printf("\n");
if(family == 15){
extended_family = (eax >> 20) & 0xff;
printf("Extended family %d\n",extended_family);
}
printf("Model %d - ",model);
switch(family){
case 3:
break;
case 4:
switch(model){
case 0:
case 1:
printf("DX");
break;
case 2:
printf("SX");
break;
case 3:
printf("487/DX2");
break;
case 4:
printf("SL");
break;
case 5:
printf("SX2");
break;
case 7:
printf("write-back enhanced DX2");
break;
case 8:
printf("DX4");
break;
}
break;
case 5:
switch(model){
case 1:
printf("60/66");
break;
case 2:
printf("75-200");
break;
case 3:
printf("for 486 system");
break;
case 4:
printf("MMX");
break;
}
break;
case 6:
switch(model){
case 1:
printf("Pentium Pro");
break;
case 3:
printf("Pentium II Model 3");
break;
case 5:
printf("Pentium II Model 5/Xeon/Celeron");
break;
case 6:
printf("Celeron");
break;
case 7:
printf("Pentium III/Pentium III Xeon - external L2 cache");
break;
case 8:
printf("Pentium III/Pentium III Xeon - internal L2 cache");
break;
}
break;
case 15:
break;
}
printf("\n");
if(model == 15){
extended_model = (eax >> 16) & 0xf;
printf("Extended model %d\n",extended_model);
}
printf("Stepping %d\n",stepping);
printf("Reserved %d\n\n",reserved);
brand = ebx & 0xff;
if(brand > 0){
printf("Brand index: %d [",brand);
if(brand < MAXBRANDS){
printf("%s]\n",Brands[brand]);
} else {
printf("not in table]\n");
}
}
cpuid(0x80000000,eax,ebx,unused,edx);
if(eax & 0x80000000){
/* Extended feature/signature bits supported */
int maxe = eax;
if(maxe >= 0x80000004){
int i;
printf("Extended brand string: \"");
for(i=0x80000002;i<=0x80000004;i++){
unsigned long eax,ebx,ecx,edx;
cpuid(i,eax,ebx,ecx,edx);
printregs(eax,ebx,ecx,edx);
}
printf("\"\n");
}
}
if(clf)
printf("CLFLUSH instruction cache line size: %d\n",clf);
if(apic_id)
printf("Initial APIC ID: %d\n",apic_id);
if(feature_flags & (1<<28)){
printf("Hyper threading siblings: %d\n",siblings);
}
printf("\nFeature flags %08x:\n",feature_flags);
for(i=0;i<32;i++){
if(feature_flags & (1<<i)){
printf("%s\n",Intel_feature_flags[i]);
}
}
printf("\n");
}
if(maxi >= 2){
/* Decode TLB and cache info */
int ntlb,i;
ntlb = 255;
printf("TLB and cache info:\n");
for(i=0;i<ntlb;i++){
unsigned long eax,ebx,ecx,edx;
cpuid(2,eax,ebx,ecx,edx);
ntlb = eax & 0xff;
decode_intel_tlb(eax >> 8);
decode_intel_tlb(eax >> 16);
decode_intel_tlb(eax >> 24);
if((ebx & 0x80000000) == 0){
decode_intel_tlb(ebx);
decode_intel_tlb(ebx >> 8);
decode_intel_tlb(ebx >> 16);
decode_intel_tlb(ebx >> 24);
}
if((ecx & 0x80000000) == 0){
decode_intel_tlb(ecx);
decode_intel_tlb(ecx >> 8);
decode_intel_tlb(ecx >> 16);
decode_intel_tlb(ecx >> 24);
}
if((edx & 0x80000000) == 0){
decode_intel_tlb(edx);
decode_intel_tlb(edx >> 8);
decode_intel_tlb(edx >> 16);
decode_intel_tlb(edx >> 24);
}
}
}
if(maxi >= 3){
/* Pentium III CPU serial number */
unsigned long signature,unused,ecx,edx;
cpuid(1,signature,unused,unused,unused);
cpuid(3,unused,unused,ecx,edx);
printf("Processor serial: ");
printf("%04lX",signature >> 16);
printf("-%04lX",signature & 0xffff);
printf("-%04lX",edx >> 16);
printf("-%04lX",edx & 0xffff);
printf("-%04lX",ecx >> 16);
printf("-%04lX\n",ecx & 0xffff);
}
}
void printregs(int eax,int ebx,int ecx,int edx){
int j;
char string[17];
string[16] = '\0';
for(j=0;j<4;j++){
string[j] = eax >> (8*j);
string[j+4] = ebx >> (8*j);
string[j+8] = ecx >> (8*j);
string[j+12] = edx >> (8*j);
}
printf("%s",string);
}
/* Decode Intel TLB and cache info descriptors */
void decode_intel_tlb(int x){
x &= 0xff;
if(x != 0)
printf("%02x: ",x);
switch(x){
case 0:
break;
case 0x1:
printf("Instruction TLB: 4KB pages, 4-way set assoc, 32 entries\n");
break;
case 0x2:
printf("Instruction TLB: 4MB pages, 4-way set assoc, 2 entries\n");
break;
case 0x3:
printf("Data TLB: 4KB pages, 4-way set assoc, 64 entries\n");
break;
case 0x4:
printf("Data TLB: 4MB pages, 4-way set assoc, 8 entries\n");
break;
case 0x6:
printf("1st-level instruction cache: 8KB, 4-way set assoc, 32 byte line size\n");
break;
case 0x8:
printf("1st-level instruction cache: 16KB, 4-way set assoc, 32 byte line size\n");
break;
case 0xa:
printf("1st-level data cache: 8KB, 2-way set assoc, 32 byte line size\n");
break;
case 0xc:
printf("1st-level data cache: 16KB, 4-way set assoc, 32 byte line size\n");
break;
case 0x40:
printf("No 2nd-level cache, or if 2nd-level cache exists, no 3rd-level cache\n");
break;
case 0x41:
printf("2nd-level cache: 128KB, 4-way set assoc, 32 byte line size\n");
break;
case 0x42:
printf("2nd-level cache: 256KB, 4-way set assoc, 32 byte line size\n");
break;
case 0x43:
printf("2nd-level cache: 512KB, 4-way set assoc, 32 byte line size\n");
break;
case 0x44:
printf("2nd-level cache: 1MB, 4-way set assoc, 32 byte line size\n");
break;
case 0x45:
printf("2nd-level cache: 2MB, 4-way set assoc, 32 byte line size\n");
break;
case 0x50:
printf("Instruction TLB: 4KB and 2MB or 4MB pages, 64 entries\n");
break;
case 0x51:
printf("Instruction TLB: 4KB and 2MB or 4MB pages, 128 entries\n");
break;
case 0x52:
printf("Instruction TLB: 4KB and 2MB or 4MB pages, 256 entries\n");
break;
case 0x5b:
printf("Data TLB: 4KB and 4MB pages, 64 entries\n");
break;
case 0x5c:
printf("Data TLB: 4KB and 4MB pages, 128 entries\n");
break;
case 0x5d:
printf("Data TLB: 4KB and 4MB pages, 256 entries\n");
break;
case 0x66:
printf("1st-level data cache: 8KB, 4-way set assoc, 64 byte line size\n");
break;
case 0x67:
printf("1st-level data cache: 16KB, 4-way set assoc, 64 byte line size\n");
break;
case 0x68:
printf("1st-level data cache: 32KB, 4-way set assoc, 64 byte line size\n");
break;
case 0x70:
printf("Trace cache: 12K-micro-op, 4-way set assoc\n");
break;
case 0x71:
printf("Trace cache: 16K-micro-op, 4-way set assoc\n");
break;
case 0x72:
printf("Trace cache: 32K-micro-op, 4-way set assoc\n");
break;
case 0x79:
printf("2nd-level cache: 128KB, 8-way set assoc, sectored, 64 byte line size\n");
break;
case 0x7a:
printf("2nd-level cache: 256KB, 8-way set assoc, sectored, 64 byte line size\n");
break;
case 0x7b:
printf("2nd-level cache: 512KB, 8-way set assoc, sectored, 64 byte line size\n");
break;
case 0x7c:
printf("2nd-level cache: 1MB, 8-way set assoc, sectored, 64 byte line size\n");
break;
case 0x82:
printf("2nd-level cache: 256KB, 8-way set assoc, 32 byte line size\n");
break;
case 0x83:
printf("2nd-level cache: 512KB, 8-way set assoc 32 byte line size\n");
break;
case 0x84:
printf("2nd-level cache: 1MB, 8-way set assoc, 32 byte line size\n");
break;
case 0x85:
printf("2nd-level cache: 2MB, 8-way set assoc, 32 byte line size\n");
break;
default:
printf("unknown TLB/cache descriptor\n");
break;
}
}
char *AMD_feature_flags[] = {
"Floating Point Unit",
"Virtual Mode Extensions",
"Debugging Extensions",
"Page Size Extensions",
"Time Stamp Counter (with RDTSC and CR4 disable bit)",
"Model Specific Registers with RDMSR & WRMSR",
"PAE - Page Address Extensions",
"Machine Check Exception",
"COMPXCHG8B Instruction",
"APIC",
"10 - Reserved",
"SYSCALL/SYSRET or SYSENTER/SYSEXIT instructions",
"MTRR - Memory Type Range Registers",
"Global paging extension",
"Machine Check Architecture",
"Conditional Move Instruction",
"PAT - Page Attribute Table",
"PSE-36 - Page Size Extensions",
"18 - reserved",
"19 - reserved",
"20 - reserved",
"21 - reserved",
"AMD MMX Instruction Extensions",
"MMX instructions",
"FXSAVE/FXRSTOR",
"25 - reserved",
"26 - reserved",
"27 - reserved",
"28 - reserved",
"29 - reserved",
"3DNow! Instruction Extensions",
"3DNow instructions",
};
char *Assoc[] = {
"L2 off",
"Direct mapped",
"2-way",
"reserved",
"4-way",
"reserved",
"8-way",
"reserved",
"16-way",
"reserved",
"reserved",
"reserved",
"reserved",
"reserved",
"reserved",
"full",
};
/* AMD-specific information */
void doamd(int maxi){
unsigned long maxei,unused;
int family = 0;
printf("AMD-specific functions\n");
/* Do standard stuff */
if(maxi >= 1){
unsigned long eax,ebx,edx,unused;
int stepping,model,reserved;
cpuid(1,eax,ebx,unused,edx);
stepping = eax & 0xf;
model = (eax >> 4) & 0xf;
family = (eax >> 8) & 0xf;
reserved = eax >> 12;
printf("Version %08lx:\n",eax);
printf("Family: %d Model: %d [",family,model);
switch(family){
case 4:
printf("486 model %d",model);
break;
case 5:
switch(model){
case 0:
case 1:
case 2:
case 3:
case 6:
case 7:
printf("K6 Model %d",model);
break;
case 8:
printf("K6-2 Model 8");
break;
case 9:
printf("K6-III Model 9");
break;
default:
printf("K5/K6 model %d",model);
break;
}
break;
case 6:
switch(model){
case 1:
case 2:
case 4:
printf("Athlon model %d",model);
break;
case 3:
printf("Duron model 3");
break;
case 6:
printf("Athlon MP/Mobile Athlon model 6");
break;
case 7:
printf("Mobile Duron Model 7");
break;
default:
printf("Duron/Athlon model %d",model);
break;
}
break;
}
printf("]\n\n");
{
int i;
printf("Standard feature flags %08lx:\n",edx);
for(i=0;i<32;i++){
if(family == 5 && model == 0){
if(i == 9)
printf("Global Paging Extensions\n");
else if(i == 13)
printf("13 - reserved\n");
} else {
if(edx & (1<<i)){
printf("%s\n",AMD_feature_flags[i]);
}
}
}
}
}
/* Check for presence of extended info */
cpuid(0x80000000,maxei,unused,unused,unused);
if(maxei == 0)
return;
if(maxei >= 0x80000001){
unsigned long eax,ebx,ecx,edx;
int stepping,model,generation,reserved;
int i;
cpuid(0x80000001,eax,ebx,ecx,edx);
stepping = eax & 0xf;
model = (eax >> 4) & 0xf;
generation = (eax >> 8) & 0xf;
reserved = eax >> 12;
printf("Generation: %d Model: %d\n",generation,model);
printf("Extended feature flags %08lx:\n",edx);
for(i=0;i<32;i++){
if(family == 5 && model == 0 && i == 9){
printf("Global Paging Extensions\n");
} else {
if(edx & (1<<i)){
printf("%s\n",AMD_feature_flags[i]);
}
}
}
}
printf("\n");
if(maxei >= 0x80000002){
/* Processor identification string */
int j;
printf("Processor name string: ");
for(j=0x80000002;j<=0x80000004;j++){
unsigned long eax,ebx,ecx,edx;
cpuid(j,eax,ebx,ecx,edx);
printregs(eax,ebx,ecx,edx);
}
printf("\n");
}
if(maxei >= 0x80000005){
/* TLB and cache info */
unsigned long eax,ebx,ecx,edx;
cpuid(0x80000005,eax,ebx,ecx,edx);
printf("L1 Cache Information:\n");
if(family >= 6){
printf("2/4-MB Pages:\n");
printf(" Data TLB: associativity %ld-way #entries %ld\n",
(eax >> 24) & 0xff,(eax >> 16) & 0xff);
printf(" Instruction TLB: associativity %ld-way #entries %ld\n",
(eax >> 8) & 0xff,eax & 0xff);
}
printf("4-KB Pages:\n");
printf(" Data TLB: associativity %ld-way #entries %ld\n",
(ebx >> 24) & 0xff,(ebx >> 16) & 0xff);
printf(" Instruction TLB: associativity %ld-way #entries %ld\n",
(ebx >> 8) & 0xff,ebx & 0xff);
printf("L1 Data cache:\n");
printf(" size %ld KB associativity %lx-way lines per tag %ld line size %ld\n",
ecx >> 24,(ecx>>16) & 0xff,(ecx >> 8)&0xff,ecx&0xff);
printf("L1 Instruction cache:\n");
printf(" size %ld KB associativity %lx-way lines per tag %ld line size %ld\n",
edx >> 24,(edx>>16) & 0xff,(edx >> 8)&0xff,edx&0xff);
printf("\n");
}
/* check K6-III (and later?) on-chip L2 cache size */
if (maxei >= 0x80000006) {
unsigned long eax,ebx,ecx,unused;
int assoc;
cpuid(0x80000006,eax,ebx,ecx,unused);
printf("L2 Cache Information:\n");
if(family >= 6){
printf("2/4-MB Pages:\n");
assoc = (eax >> 24) & 0xff;
if(assoc == 6)
assoc = 8;
printf(" Data TLB: associativity %s #entries %ld\n",
Assoc[(eax >> 24) & 0xf],(eax >> 16) & 0xff);
assoc = (eax >> 16) & 0xff;
printf(" Instruction TLB: associativity %s #entries %ld\n",
Assoc[(eax >> 8) & 0xf],eax & 0xff);
printf("4-KB Pages:\n");
printf(" Data TLB: associativity %s #entries %ld\n",
Assoc[(ebx >> 24) & 0xf],(ebx >> 16) & 0xff);
printf(" Instruction TLB: associativity %s #entries %ld\n",
Assoc[(ebx >> 8) & 0xf],ebx & 0xff);
}
printf(" size %ld KB associativity %s lines per tag %ld line size %ld\n",
ecx >> 24,Assoc[(ecx>>16) & 0xf],(ecx >> 8)&0xff,ecx&0xff);
printf("\n");
}
/* Check power management feature flags */
if(maxei >= 0x80000007){
unsigned long unused,edx;
printf("Advanced Power Management Feature Flags\n");
cpuid(0x80000007,unused,unused,unused,edx);
if(edx & 1)
printf("Has temperature sensing diode\n");
if(edx & 2)
printf("Supports Frequency ID control\n");
if(edx & 4)
printf("Supports Voltage ID control\n");
}
/* Check phys address & linear address size */
if(maxei >= 0x80000008){
unsigned long unused,eax;
cpuid(0x80000008,eax,unused,unused,unused);
printf("Maximum linear address: %ld; maximum phys address %ld\n",
(eax>>8) & 0xff,eax&0xff);
}
}
char *Cyrix_standard_feature_flags_5[] = {
"FPU Floating Point Unit",
"V86 Virtual Mode Extensions",
"Debug Extension",
"4MB Page Size",
"Time Stamp Counter",
"RDMSR/WRMSR (Model Specific Registers)",
"PAE",
"Machine Check Exception",
"COMPXCHG8B Instruction",
"APIC - On-chip Advanced Programmable Interrupt Controller present and enabled",
"10 - Reserved",
"11 - Reserved",
"MTRR Memory Type Range Registers",
"13 - reserved",
"Machine Check",
"CMOV Conditional Move Instruction",
"16 - reserved",
"17 - reserved",
"18 - reserved",
"19 - reserved",
"20 - reserved",
"21 - reserved",
"22 - reserved",
"MMX instructions",
"24 - reserved",
"25 - reserved",
"26 - reserved",
"27 - reserved",
"28 - reserved",
"29 - reserved",
"30 - reserved",
};
char *Cyrix_standard_feature_flags_not5[] = {
"FPU Floating Point Unit",
"V86 Virtual Mode Extensions",
"Debug Extension",
"4MB Page Size",
"Time Stamp Counter",
"RDMSR/WRMSR (Model Specific Registers)",
"PAE",
"Machine Check Exception",
"COMPXCHG8B Instruction",
"APIC - On-chip Advanced Programmable Interrupt Controller present and enabled",
"10 - Reserved",
"11 - Reserved",
"MTRR Memory Type Range Registers",
"Global Paging Extension",
"Machine Check",
"CMOV Conditional Move Instruction",
"16 - reserved",
"17 - reserved",
"18 - reserved",
"19 - reserved",
"20 - reserved",
"21 - reserved",
"22 - reserved",
"MMX instructions",
"24 - reserved",
"25 - reserved",
"26 - reserved",
"27 - reserved",
"28 - reserved",
"29 - reserved",
"30 - reserved",
};
char *Cyrix_extended_feature_flags[] = {
"FPU Floating Point Unit",
"V86 Virtual Mode Extensions",
"Debug Extension",
"Page Size Extensions",
"Time Stamp Counter",
"Cyrix MSR",
"PAE",
"MC Exception",
"COMPXCHG8B",
"APIC on chip",
"SYSCALL/SYSRET",
"11 - reserved",
"MTRR",
"Global bit",
"Machine Check",
"CMOV",
"FPU CMOV",
"17 - reserved",
"18 - reserved",
"19 - reserved",
"20 - reserved",
"21 - reserved",
"22 - reserved",
"MMX",
"Extended MMX",
"25 - reserved",
"26 - reserved",
"27 - reserved",
"28 - reserved",
"29 - reserved",
"30 - reserved",
"3DNow instructions",
};
/* Cyrix-specific information */
void docyrix(int maxi){
unsigned long maxei,unused;
int i;
printf("Cyrix-specific functions\n");
cpuid(0x80000000,maxei,unused,unused,unused);
/* Dump extended info, if any, in raw hex */
for(i=0x80000000;i<=maxei;i++){
unsigned long eax,ebx,ecx,edx;
cpuid(i,eax,ebx,ecx,edx);
printf("eax in: 0x%x, eax = %08lx ebx = %08lx ecx = %08lx edx = %08lx\n",i,eax,ebx,ecx,edx);
}
/* Do standard stuff */
if(maxi >= 1){
unsigned long eax,unused,edx;
int stepping,model,family,reserved;
cpuid(1,eax,unused,unused,edx);
stepping = eax & 0xf;
model = (eax >> 4) & 0xf;
family = (eax >> 8) & 0xf;
reserved = eax >> 12;
printf("Family: %d Model: %d [",family,model);
switch(family){
case 4:
switch(model){
case 4:
printf("MediaGX");
break;
}
break;
case 5:
switch(model){
case 2:
printf("6x86");
break;
case 4:
printf("BXm");
break;
}
break;
case 6:
switch(model){
case 0:
printf("6x86/MX");
break;
}
break;
}
printf("]\n\n");
if(family == 5 && model == 0){
int i;
for(i=0;i<32;i++){
if(edx & (1<<i)){
printf("%s\n",Cyrix_standard_feature_flags_5[i]);
}
}
} else {
int i;
for(i=0;i<32;i++){
if(edx & (1<<i)){
printf("%s\n",Cyrix_standard_feature_flags_not5[i]);
}
}
}
}
if(maxi >= 2){
/* TLB and L1 Cache info */
int ntlb = 255;
int i;
for(i=0;i<ntlb;i++){
unsigned long eax,edx,unused;
cpuid(2,eax,unused,unused,edx);
ntlb = eax & 0xff;
decode_cyrix_tlb(eax >> 8);
decode_cyrix_tlb(eax >> 16);
decode_cyrix_tlb(eax >> 24);
/* ebx and ecx are reserved */
if((edx & 0x80000000) == 0){
decode_cyrix_tlb(edx);
decode_cyrix_tlb(edx >> 8);
decode_cyrix_tlb(edx >> 16);
decode_cyrix_tlb(edx >> 24);
}
}
}
/* Check for presence of extended info */
if(maxei < 0x80000000)
return;
printf("\nExtended info:\n");
if(maxei >= 0x80000001){
unsigned long eax,ebx,ecx,edx;
int stepping,model,family,reserved,i;
cpuid(0x80000001,eax,ebx,ecx,edx);
stepping = eax & 0xf;
model = (eax >> 4) & 0xf;
family = (eax >> 8) & 0xf;
reserved = eax >> 12;
printf("Family: %d Model: %d [",family,model);
switch(family){
case 4:
printf("MediaGX");
break;
case 5:
printf("6x86/GXm");
break;
case 6:
printf("6x86/MX");
}
printf("]\n\n");
printf("Extended feature flags:\n");
for(i=0;i<32;i++){
if(edx & (1<<i)){
printf("%s\n",Cyrix_extended_feature_flags[i]);
}
}
}
printf("\n");
if(maxei >= 0x80000002){
/* Processor identification string */
char namestring[49],*cp;
int j;
cp = namestring;
printf("Processor name string: ");
for(j=0x80000002;j<=0x80000004;j++){
unsigned long eax,ebx,ecx,edx;
cpuid(j,eax,ebx,ecx,edx);
printregs(eax,ebx,ecx,edx);
}
}
if(maxei >= 0x80000005){
/* TLB and L1 Cache info */
int ntlb = 255;
int i;
for(i=0;i<ntlb;i++){
unsigned long eax,ebx,ecx,unused;
cpuid(0x80000005,eax,ebx,ecx,unused);
ntlb = eax & 0xff;
decode_cyrix_tlb(ebx >> 8);
decode_cyrix_tlb(ebx >> 16);
decode_cyrix_tlb(ebx >> 24);
/* eax and edx are reserved */
if((ecx & 0x80000000) == 0){
decode_cyrix_tlb(ecx);
decode_cyrix_tlb(ecx >> 8);
decode_cyrix_tlb(ecx >> 16);
decode_cyrix_tlb(ecx >> 24);
}
}
}
}
/* Decode Cyrix TLB and cache info descriptors */
void decode_cyrix_tlb(int x){
switch(x & 0xff){
case 0:
break;
case 0x70:
printf("TLB: 32 entries 4-way associative 4KB pages\n");
break;
case 0x80:
printf("L1 Cache: 16KB 4-way associative 16 bytes/line\n");
break;
}
}
]]>