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
xtoi(const char * xs,unsigned int * result)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
main(int argc,char * argv[])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 }
94