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/**
* @file op_cpu_type.c
* CPU type determination
*
* @remark Copyright 2002 OProfile authors
* @remark Read the file COPYING
*
* @author John Levon
* @author Philippe Elie
*/
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include "op_cpu_type.h"
struct cpu_descr {
char const * pretty;
char const * name;
op_cpu cpu;
unsigned int nr_counters;
};
static struct cpu_descr const cpu_descrs[MAX_CPU_TYPE] = {
{ "Pentium Pro", "i386/ppro", CPU_PPRO, 2 },
{ "PII", "i386/pii", CPU_PII, 2 },
{ "PIII", "i386/piii", CPU_PIII, 2 },
{ "Athlon", "i386/athlon", CPU_ATHLON, 4 },
{ "CPU with timer interrupt", "timer", CPU_TIMER_INT, 1 },
{ "CPU with RTC device", "rtc", CPU_RTC, 1 },
{ "P4 / Xeon", "i386/p4", CPU_P4, 8 },
{ "IA64", "ia64/ia64", CPU_IA64, 4 },
{ "Itanium", "ia64/itanium", CPU_IA64_1, 4 },
{ "Itanium 2", "ia64/itanium2", CPU_IA64_2, 4 },
{ "AMD64 processors", "x86-64/hammer", CPU_HAMMER, 4 },
{ "P4 / Xeon with 2 hyper-threads", "i386/p4-ht", CPU_P4_HT2, 4 },
{ "Alpha EV4", "alpha/ev4", CPU_AXP_EV4, 2 },
{ "Alpha EV5", "alpha/ev5", CPU_AXP_EV5, 3 },
{ "Alpha PCA56", "alpha/pca56", CPU_AXP_PCA56, 3 },
{ "Alpha EV6", "alpha/ev6", CPU_AXP_EV6, 2 },
{ "Alpha EV67", "alpha/ev67", CPU_AXP_EV67, 20 },
{ "Pentium M (P6 core)", "i386/p6_mobile", CPU_P6_MOBILE, 2 },
{ "ARM/XScale PMU1", "arm/xscale1", CPU_ARM_XSCALE1, 3 },
{ "ARM/XScale PMU2", "arm/xscale2", CPU_ARM_XSCALE2, 5 },
{ "ppc64 POWER4", "ppc64/power4", CPU_PPC64_POWER4, 8 },
{ "ppc64 POWER5", "ppc64/power5", CPU_PPC64_POWER5, 6 },
{ "ppc64 970", "ppc64/970", CPU_PPC64_970, 8 },
{ "MIPS R10000", "mips/r10000", CPU_MIPS_R10000, 2 },
{ "MIPS R12000", "mips/r12000", CPU_MIPS_R12000, 4 },
{ "QED RM7000", "mips/rm7000", CPU_MIPS_RM7000, 1 },
{ "PMC-Sierra RM9000", "mips/rm9000", CPU_MIPS_RM9000, 2 },
{ "Sibyte SB1", "mips/sb1", CPU_MIPS_SB1, 4 },
{ "NEC VR5432", "mips/vr5432", CPU_MIPS_VR5432, 2 },
{ "NEC VR5500", "mips/vr5500", CPU_MIPS_VR5500, 2 },
{ "e500", "ppc/e500", CPU_PPC_E500, 4 },
};
static size_t const nr_cpu_descrs = sizeof(cpu_descrs) / sizeof(struct cpu_descr);
op_cpu op_get_cpu_type(void)
{
int cpu_type = CPU_NO_GOOD;
char str[100];
FILE * fp;
fp = fopen("/proc/sys/dev/oprofile/cpu_type", "r");
if (!fp) {
/* Try 2.6's oprofilefs one instead. */
fp = fopen("/dev/oprofile/cpu_type", "r");
if (!fp) {
fprintf(stderr, "Unable to open cpu_type file for reading\n");
fprintf(stderr, "Make sure you have done opcontrol --init\n");
return cpu_type;
}
}
if (!fgets(str, 99, fp)) {
fprintf(stderr, "Could not read cpu type.\n");
return CPU_NO_GOOD;
}
cpu_type = op_get_cpu_number(str);
fclose(fp);
return cpu_type;
}
op_cpu op_get_cpu_number(char const * cpu_string)
{
int cpu_type = CPU_NO_GOOD;
size_t i;
for (i = 0; i < nr_cpu_descrs; ++i) {
if (!strcmp(cpu_descrs[i].name, cpu_string)) {
cpu_type = cpu_descrs[i].cpu;
break;
}
}
/* Attempt to convert into a number */
if (cpu_type == CPU_NO_GOOD)
sscanf(cpu_string, "%d\n", &cpu_type);
if (cpu_type <= CPU_NO_GOOD || cpu_type >= MAX_CPU_TYPE)
cpu_type = CPU_NO_GOOD;
return cpu_type;
}
char const * op_get_cpu_type_str(op_cpu cpu_type)
{
if (cpu_type <= CPU_NO_GOOD || cpu_type >= MAX_CPU_TYPE)
return "invalid cpu type";
return cpu_descrs[cpu_type].pretty;
}
char const * op_get_cpu_name(op_cpu cpu_type)
{
if (cpu_type <= CPU_NO_GOOD || cpu_type >= MAX_CPU_TYPE)
return "invalid cpu type";
return cpu_descrs[cpu_type].name;
}
int op_get_nr_counters(op_cpu cpu_type)
{
if (cpu_type <= CPU_NO_GOOD || cpu_type >= MAX_CPU_TYPE)
return 0;
return cpu_descrs[cpu_type].nr_counters;
}