1 /* ----------------------------------------------------------------------- * 2 * 3 * Copyright 2010 Intel Corporation; author: H. Peter Anvin 4 * 5 * This program is free software; you can redistribute it and/or modify 6 * it under the terms of the GNU General Public License as published by 7 * the Free Software Foundation, Inc., 51 Franklin St, Fifth Floor, 8 * Boston MA 02110-1301, USA; either version 2 of the License, or 9 * (at your option) any later version; incorporated herein by reference. 10 * 11 * ----------------------------------------------------------------------- */ 12 13 #include <stdio.h> 14 #include <stdlib.h> 15 #include <sys/cpu.h> 16 #include <console.h> 17 #include <com32.h> 18 19 static void dump_reg(const char *name, uint32_t val) 20 { 21 int i; 22 23 printf("%-3s : %10u 0x%08x ", name, val, val); 24 25 for (i = 3; i >= 0; i--) { 26 uint8_t c = val >> (i*8); 27 putchar((c >= ' ' && c <= '~') ? c : '.'); 28 } 29 putchar('\n'); 30 } 31 32 int main(int argc, char *argv[]) 33 { 34 uint32_t leaf, counter; 35 uint32_t eax, ebx, ecx, edx; 36 37 if (argc < 2 || argc > 4) { 38 printf("Usage: %s leaf [counter]\n", argv[0]); 39 exit(1); 40 } 41 42 leaf = strtoul(argv[1], NULL, 0); 43 counter = (argc > 2) ? strtoul(argv[2], NULL, 0) : 0; 44 45 if (!cpu_has_eflag(EFLAGS_ID)) { 46 printf("The CPUID instruction is not supported\n"); 47 exit(1); 48 } 49 50 cpuid_count(leaf, counter, &eax, &ebx, &ecx, &edx); 51 52 dump_reg("eax", eax); 53 dump_reg("ebx", ebx); 54 dump_reg("ecx", ecx); 55 dump_reg("edx", edx); 56 57 return 0; 58 } 59
