src/tools/cpuidtool.c

   1 /*
   2  * Copyright 2012 Haiku, Inc. All rights reserved.
   3  * Distributed under the terms of the MIT License.
   4  *
   5  * Authors:
   6  *              Alexander von Gluck, kallisti5@unixzen.com
   7  */
   8
   9 /*
  10  * Pass a standard CPUID in hex, and get out a CPUID for cpu_type.h
  11  */
  12
  13
  14 #include <stdio.h>
  15 #include <stdlib.h>
  16 #include <string.h>
  17
  18
  19 #define EXT_FAMILY_MASK 0xF00000
  20 #define EXT_MODEL_MASK  0x0F0000
  21 #define FAMILY_MASK             0x000F00
  22 #define MODEL_MASK              0x0000F0
  23 #define STEPPING_MASK   0x00000F
  24
  25
  26 // Converts a hexadecimal string to integer
  27 static int
  28 xtoi(const char* xs, unsigned int* result)
  29 {
  30         size_t szlen = strlen(xs);
  31         int i;
  32         int xv;
  33         int fact;
  34
  35         if (szlen > 0) {
  36                 // Converting more than 32bit hexadecimal value?
  37                 if (szlen > 8)
  38                         return 2;
  39
  40                 // Begin conversion here
  41                 *result = 0;
  42                 fact = 1;
  43
  44                 // Run until no more character to convert
  45                 for (i = szlen - 1; i>=0; i--) {
  46                         if (isxdigit(*(xs + i))) {
  47                                 if (*(xs + i) >= 97)
  48                                         xv = (*(xs + i) - 97) + 10;
  49                                 else if (*(xs + i) >= 65)
  50                                         xv = (*(xs + i) - 65) + 10;
  51                                 else
  52                                         xv = *(xs + i) - 48;
  53
  54                                 *result += (xv * fact);
  55                                 fact *= 16;
  56                         } else {
  57                                 // Conversion was abnormally terminated
  58                                 // by non hexadecimal digit, hence
  59                                 // returning only the converted with
  60                                 // an error value 4 (illegal hex character)
  61                                 return 4;
  62                         }
  63                 }
  64         }
  65
  66         // Nothing to convert
  67         return 1;
  68 }
  69
  70
  71 int
  72 main(int argc, char *argv[])
  73 {
  74         if (argc != 2) {
  75                 printf("Provide the cpuid in hex, and you will get how we id it\n");
  76                 printf("usage: cpuidhaiku <cpuid_hex>\n");
  77                 return 1;
  78         }
  79
  80         unsigned int cpuid = 0;
  81         xtoi(argv[1], &cpuid);
  82
  83         printf("cpuid: 0x%X\n", cpuid);
  84
  85     int family = ((cpuid >> 8) & 0xf) | ((cpuid >> 16) & 0xff0);
  86     int model = ((cpuid >> 4) & 0xf) | ((cpuid >> 12) & 0xf0);
  87     int stepping = cpuid & 0xf;
  88
  89         printf("Haiku CPUID: Family: 0x%x, Model: 0x%x, Stepping: 0x%x\n", family,
  90                 model, stepping);
  91
  92         return 0;
  93 }