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/*
* (C) 2001 Dave Jones.
*
* Licensed under the terms of the GNU GPL License version 2.
*
* Centaur specific parts.
*/
#include <stdio.h>
#include "../x86info.h"
#include "centaur.h"
static char *centaur_nameptr;
#define add_to_cpuname(x) centaur_nameptr += snprintf(centaur_nameptr, sizeof(x), "%s", x)
void identify_centaur(struct cpudata *cpu)
{
centaur_nameptr = cpu->name;
switch (tuple(cpu) & 0xff0) {
case 0x540:
add_to_cpuname("Winchip C6");
//transistors = 5400000;
//fab_process = "0.35 micron CMOS";
//die_size = "88 sq.mm";
//introduction_date = "September 1997";
//pipeline_stages = 6;
break;
case 0x580:
switch (cpu->stepping) {
case 0 ... 6:
add_to_cpuname("Winchip 2");
break;
case 7 ... 9:
add_to_cpuname("Winchip 2A");
break;
case 0xA ... 0xF:
add_to_cpuname("Winchip 2B");
break;
}
break;
case 0x590:
add_to_cpuname("Winchip 3");
break;
/* Family 6 is when VIA bought out Cyrix & Centaur
* This is the CyrixIII family. */
case 0x660:
add_to_cpuname("VIA Cyrix 3 (Samuel) [C5A]");
//pipeline_stages = 12;
//1.8-2.0V
//CPGA
//75mm
//0.18 Al
//500-733MHz
//11.3 mil transistors
//June 6 2000
break;
case 0x670:
switch (cpu->stepping) {
case 0 ... 7:
add_to_cpuname("VIA C3 (Samuel 2) [C5B]");
//pipeline_stages = 12;
//1.6V
//CPGA/EBGA
//52mm
//0.15u Al
//650-800MHz
//15.2 mil transistors
//Mar 25 2001
break;
case 8 ... 0xf:
add_to_cpuname("VIA C3 (Ezra) [C5C]");
//pipeline_stages = 12;
//1.35V
//CPGA/EBGA
//52mm
//0.15u/0.13u hybrid Al
//800-1000MHz
//15.4 mil transistors
//Sep 11 2001
break;
}
break;
/* Ezra-T is much like Ezra but reworked to run in Pentium III Tualatin sockets. */
case 0x680: add_to_cpuname("VIA C3 (Ezra-T) [C5M/C5N]");
//pipeline_stages = 12;
//CPGA/EBGA/uPGA2/uFCPGA
//900-1200MHz
//56mm
//0.15/0.13u hybrid (Cu)
//15.5 mil transistors
//C5N=copper interconnectrs
//2002
break;
case 0x690: add_to_cpuname("VIA C3 (Nehemiah) [C5XL]");
//pipeline_stages = 16;
//2 SSE units
//first C3 to run FPU at full clock speed (previous ran at 50%)
//1100-1300
//0.13 (Cu)
//die_size = "78 sq. mm"; (C5X)
//die_size = "54 sq. mm"; (C5XL)
//January 22 2003
break;
case 0x6A0: switch (cpu->stepping) {
case 0:
case 8 ... 0xF:
add_to_cpuname("VIA C3 (Esther) [C7-M]");
break;
case 1 ... 7:
add_to_cpuname("VIA C3 (Ruth) [C7-M]");
break;
}
break;
// C5P introduced the HW AES
// C5YL
// C5X
// CZA
default:
add_to_cpuname("Unknown VIA CPU");
break;
}
}
static void decode_centaur_cacheinfo(struct cpudata *cpu)
{
unsigned int eax, ebx, ecx, edx;
if (cpu->maxei >= 0x80000005) {
/* TLB and cache info */
cpuid(cpu->number, 0x80000005, &eax, &ebx, &ecx, &edx);
printf("Cache info\n");
printf(" L1 Instruction cache: %dKB, %d-way associative, %d lines per tag, line size=%d bytes.\n",
edx >> 24, (edx >> 16) & 0xff, (edx >> 8) & 0xff, edx & 0xff);
printf(" L1 Data cache: %dKB %d-way associative, %d lines per tag, line size=%d bytes.\n",
ecx >> 24, (ecx >> 16) & 0xff, (ecx >> 8) & 0xff, ecx & 0xff);
if (cpu->maxei >= 0x80000006) {
cpuid (cpu->number, 0x80000006, &eax, &ebx, &ecx, &edx);
if ((cpu->family==6) && (cpu->model==7 || cpu->model==8))
/* Work around errata. */
printf(" L2 (on CPU) cache: %dKB %d-way associative, %d lines per tag, line size=%d bytes.\n",
ecx >> 24, (ecx >> 16) & 0x0f, (ecx >> 8) & 0x0f, ecx & 0xff);
else
printf(" L2 (on CPU) cache: %dKB %d-way associative, %d lines per tag, line size=%d bytes.\n",
ecx >> 16, (ecx >> 12) & 0x0f, (ecx >> 8) & 0x0f, ecx & 0xff);
}
printf("TLB info\n");
cpuid(cpu->number, 0x80000005, &eax, &ebx, &ecx, &edx);
printf(" Instruction TLB: %d-way associative. %d entries.\n", (ebx >> 8) & 0xff, ebx & 0xff);
printf(" Data TLB: %d-way associative. %d entries.\n", ebx >> 24, (ebx >> 16) & 0xff);
}
/* check on-chip L2 cache size */
}
void display_centaur_info(struct cpudata *cpu)
{
if (cpu->maxei == 0)
return;
decode_centaur_cacheinfo(cpu);
if (cpu->family == 6 && show_cpuid)
dump_C3_MSR(cpu);
}
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