mirror of
https://review.haiku-os.org/haiku
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112 lines
2.4 KiB
C
112 lines
2.4 KiB
C
/*
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* Copyright 2012 Haiku, Inc. All rights reserved.
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* Distributed under the terms of the MIT License.
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*
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* Authors:
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* Alexander von Gluck, kallisti5@unixzen.com
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*/
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/*
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* Pass a standard CPUID in hex, and get out a CPUID for OS.h
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*/
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#define EXT_FAMILY_MASK 0xF00000
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#define EXT_MODEL_MASK 0x0F0000
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#define FAMILY_MASK 0x000F00
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#define MODEL_MASK 0x0000F0
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#define STEPPING_MASK 0x00000F
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// Converts a hexadecimal string to integer
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static int
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xtoi(const char* xs, unsigned int* result)
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{
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size_t szlen = strlen(xs);
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int i;
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int xv;
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int fact;
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if (szlen > 0) {
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// Converting more than 32bit hexadecimal value?
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if (szlen > 8)
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return 2;
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// Begin conversion here
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*result = 0;
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fact = 1;
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// Run until no more character to convert
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for (i = szlen - 1; i>=0; i--) {
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if (isxdigit(*(xs + i))) {
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if (*(xs + i) >= 97)
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xv = (*(xs + i) - 97) + 10;
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else if (*(xs + i) >= 65)
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xv = (*(xs + i) - 65) + 10;
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else
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xv = *(xs + i) - 48;
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*result += (xv * fact);
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fact *= 16;
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} else {
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// Conversion was abnormally terminated
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// by non hexadecimal digit, hence
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// returning only the converted with
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// an error value 4 (illegal hex character)
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return 4;
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}
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}
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}
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// Nothing to convert
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return 1;
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}
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int
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main(int argc, char *argv[])
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{
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if (argc != 3) {
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printf("Provide the cpuid in hex, and you will get how we id it\n");
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printf("usage: cpuidhaiku <AMD|INTEL> <cpuid_hex>\n");
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return 1;
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}
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unsigned int cpuid = 0;
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xtoi(argv[2], &cpuid);
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printf("cpuid: 0x%X\n", cpuid);
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unsigned int extFam = (cpuid & EXT_FAMILY_MASK) >> 20;
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unsigned int extMod = (cpuid & EXT_MODEL_MASK) >> 16;
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unsigned int family = (cpuid & FAMILY_MASK) >> 8;
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unsigned int model = (cpuid & MODEL_MASK) >> 4;
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unsigned int stepping = (cpuid & STEPPING_MASK);
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unsigned int cpuidHaiku;
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if (strncmp(argv[1], "AMD", 3) == 0) {
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if (family == 0xF) {
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cpuidHaiku = (extFam << 20) + (extMod << 16)
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+ (family << 4) + model;
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} else
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cpuidHaiku = (family << 4) + model;
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cpuidHaiku += 0x1100; // AMD vendor id
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} else if (strncmp(argv[1], "INTEL", 5) == 0) {
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cpuidHaiku = (extFam << 20) + (extMod << 16)
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+ (family << 4) + model;
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cpuidHaiku += 0x1000; // Intel vendor id
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} else {
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printf("Vendor should be AMD or INTEL\n");
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return 1;
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}
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printf("Haiku CPUID: 0x%lx\n", cpuidHaiku);
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return 0;
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}
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