op_cpu_type.c revision 5bbbe460405564a1aed8a67a13c43e9356ffc656 
1/**
2 * @file op_cpu_type.c
3 * CPU type determination
4 *
5 * @remark Copyright 2002 OProfile authors
6 * @remark Read the file COPYING
7 *
8 * @author John Levon
9 * @author Philippe Elie
10 */
11
12#include <stdio.h>
13#include <stdlib.h>
14#include <string.h>
15
16#include "op_cpu_type.h"
17#include "op_hw_specific.h"
18
19struct cpu_descr {
20	char const * pretty;
21	char const * name;
22	op_cpu cpu;
23	unsigned int nr_counters;
24};
25
26static struct cpu_descr const cpu_descrs[MAX_CPU_TYPE] = {
27	{ "Pentium Pro", "i386/ppro", CPU_PPRO, 2 },
28	{ "PII", "i386/pii", CPU_PII, 2 },
29	{ "PIII", "i386/piii", CPU_PIII, 2 },
30	{ "Athlon", "i386/athlon", CPU_ATHLON, 4 },
31	{ "CPU with timer interrupt", "timer", CPU_TIMER_INT, 1 },
32	{ "CPU with RTC device", "rtc", CPU_RTC, 1 },
33	{ "P4 / Xeon", "i386/p4", CPU_P4, 8 },
34	{ "IA64", "ia64/ia64", CPU_IA64, 4 },
35	{ "Itanium", "ia64/itanium", CPU_IA64_1, 4 },
36	{ "Itanium 2", "ia64/itanium2", CPU_IA64_2, 4 },
37	{ "AMD64 processors", "x86-64/hammer", CPU_HAMMER, 4 },
38	{ "P4 / Xeon with 2 hyper-threads", "i386/p4-ht", CPU_P4_HT2, 4 },
39	{ "Alpha EV4", "alpha/ev4", CPU_AXP_EV4, 2 },
40	{ "Alpha EV5", "alpha/ev5", CPU_AXP_EV5, 3 },
41	{ "Alpha PCA56", "alpha/pca56", CPU_AXP_PCA56, 3 },
42	{ "Alpha EV6", "alpha/ev6", CPU_AXP_EV6, 2 },
43	{ "Alpha EV67", "alpha/ev67", CPU_AXP_EV67, 20 },
44	{ "Pentium M (P6 core)", "i386/p6_mobile", CPU_P6_MOBILE, 2 },
45	{ "ARM/XScale PMU1", "arm/xscale1", CPU_ARM_XSCALE1, 3 },
46	{ "ARM/XScale PMU2", "arm/xscale2", CPU_ARM_XSCALE2, 5 },
47	{ "ppc64 POWER4", "ppc64/power4", CPU_PPC64_POWER4, 8 },
48	{ "ppc64 POWER5", "ppc64/power5", CPU_PPC64_POWER5, 6 },
49	{ "ppc64 POWER5+", "ppc64/power5+", CPU_PPC64_POWER5p, 6 },
50	{ "ppc64 970", "ppc64/970", CPU_PPC64_970, 8 },
51	{ "MIPS 20K", "mips/20K", CPU_MIPS_20K, 1},
52	{ "MIPS 24K", "mips/24K", CPU_MIPS_24K, 2},
53	{ "MIPS 25K", "mips/25K", CPU_MIPS_25K, 2},
54	{ "MIPS 34K", "mips/34K", CPU_MIPS_34K, 2},
55	{ "MIPS 5K", "mips/5K", CPU_MIPS_5K, 2},
56	{ "MIPS R10000", "mips/r10000", CPU_MIPS_R10000, 2 },
57	{ "MIPS R12000", "mips/r12000", CPU_MIPS_R12000, 4 },
58	{ "QED RM7000", "mips/rm7000", CPU_MIPS_RM7000, 1 },
59	{ "PMC-Sierra RM9000", "mips/rm9000", CPU_MIPS_RM9000, 2 },
60	{ "Sibyte SB1", "mips/sb1", CPU_MIPS_SB1, 4 },
61	{ "NEC VR5432", "mips/vr5432", CPU_MIPS_VR5432, 2 },
62	{ "NEC VR5500", "mips/vr5500", CPU_MIPS_VR5500, 2 },
63	{ "e500", "ppc/e500", CPU_PPC_E500, 4 },
64	{ "e500v2", "ppc/e500v2", CPU_PPC_E500_2, 4 },
65	{ "Core Solo / Duo", "i386/core", CPU_CORE, 2 },
66	{ "PowerPC G4", "ppc/7450",  CPU_PPC_7450, 6 },
67	{ "Core 2", "i386/core_2", CPU_CORE_2, 2 },
68	{ "ppc64 POWER6", "ppc64/power6", CPU_PPC64_POWER6, 4 },
69	{ "ppc64 970MP", "ppc64/970MP", CPU_PPC64_970MP, 8 },
70	{ "ppc64 Cell Broadband Engine", "ppc64/cell-be", CPU_PPC64_CELL, 8 },
71	{ "AMD64 family10", "x86-64/family10", CPU_FAMILY10, 4 },
72	{ "ppc64 PA6T", "ppc64/pa6t", CPU_PPC64_PA6T, 6 },
73	{ "ARM 11MPCore", "arm/mpcore", CPU_ARM_MPCORE, 2 },
74	{ "ARM V6 PMU", "arm/armv6", CPU_ARM_V6, 3 },
75	{ "ppc64 POWER5++", "ppc64/power5++", CPU_PPC64_POWER5pp, 6 },
76	{ "e300", "ppc/e300", CPU_PPC_E300, 4 },
77	{ "AVR32", "avr32", CPU_AVR32, 3 },
78	{ "ARM Cortex-A8", "arm/armv7", CPU_ARM_V7, 5 },
79 	{ "Intel Architectural Perfmon", "i386/arch_perfmon", CPU_ARCH_PERFMON, 0},
80	{ "AMD64 family11h", "x86-64/family11h", CPU_FAMILY11H, 4 },
81	{ "ppc64 POWER7", "ppc64/power7", CPU_PPC64_POWER7, 6 },
82	{ "ppc64 compat version 1", "ppc64/ibm-compat-v1", CPU_PPC64_IBM_COMPAT_V1, 4 },
83   	{ "Intel Core/i7", "i386/core_i7", CPU_CORE_I7, 4 },
84   	{ "Intel Atom", "i386/atom", CPU_ATOM, 2 },
85	{ "Loongson2", "mips/loongson2", CPU_MIPS_LOONGSON2, 2 },
86	{ "Intel Nehalem microarchitecture", "i386/nehalem", CPU_NEHALEM, 4 },
87	{ "ARM Cortex-A9", "arm/armv7-ca9", CPU_ARM_V7_CA9, 7 },
88	{ "MIPS 74K", "mips/74K", CPU_MIPS_74K, 4},
89	{ "MIPS 1004K", "mips/1004K", CPU_MIPS_1004K, 2},
90};
91
92static size_t const nr_cpu_descrs = sizeof(cpu_descrs) / sizeof(struct cpu_descr);
93
94op_cpu op_get_cpu_type(void)
95{
96	int cpu_type = CPU_NO_GOOD;
97	char str[100];
98	FILE * fp;
99
100	fp = fopen("/proc/sys/dev/oprofile/cpu_type", "r");
101	if (!fp) {
102		/* Try 2.6's oprofilefs one instead. */
103		fp = fopen("/dev/oprofile/cpu_type", "r");
104		if (!fp) {
105			fprintf(stderr, "Unable to open cpu_type file for reading\n");
106			fprintf(stderr, "Make sure you have done opcontrol --init\n");
107			return cpu_type;
108		}
109	}
110
111	if (!fgets(str, 99, fp)) {
112		fprintf(stderr, "Could not read cpu type.\n");
113		return CPU_NO_GOOD;
114	}
115
116	cpu_type = op_get_cpu_number(str);
117
118	fclose(fp);
119
120	return cpu_type;
121}
122
123
124op_cpu op_get_cpu_number(char const * cpu_string)
125{
126	int cpu_type = CPU_NO_GOOD;
127	size_t i;
128
129	for (i = 0; i < nr_cpu_descrs; ++i) {
130		if (!strcmp(cpu_descrs[i].name, cpu_string)) {
131			cpu_type = cpu_descrs[i].cpu;
132			break;
133		}
134	}
135
136	/* Attempt to convert into a number */
137	if (cpu_type == CPU_NO_GOOD)
138		sscanf(cpu_string, "%d\n", &cpu_type);
139
140	if (cpu_type <= CPU_NO_GOOD || cpu_type >= MAX_CPU_TYPE)
141		cpu_type = CPU_NO_GOOD;
142
143	return cpu_type;
144}
145
146
147char const * op_get_cpu_type_str(op_cpu cpu_type)
148{
149	if (cpu_type <= CPU_NO_GOOD || cpu_type >= MAX_CPU_TYPE)
150		return "invalid cpu type";
151
152	return cpu_descrs[cpu_type].pretty;
153}
154
155
156char const * op_get_cpu_name(op_cpu cpu_type)
157{
158	if (cpu_type <= CPU_NO_GOOD || cpu_type >= MAX_CPU_TYPE)
159		return "invalid cpu type";
160
161	return cpu_descrs[cpu_type].name;
162}
163
164
165int op_get_nr_counters(op_cpu cpu_type)
166{
167	int cnt;
168
169	if (cpu_type <= CPU_NO_GOOD || cpu_type >= MAX_CPU_TYPE)
170		return 0;
171
172	cnt = arch_num_counters(cpu_type);
173	if (cnt >= 0)
174		return cnt;
175
176	return cpu_descrs[cpu_type].nr_counters;
177}
178