cpuid.c

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/*
 * kernel_arch/i386/kernel/cpu/cpuid.c
 *
 * Copyright (c) 2003-2004 Lukasz Dembinski <dembol@nasa.com.pl>
 * All Rights Reserved
 * 
 * Date:        2004/01
 * Author:      Lukasz Dembinski
 * Info:        cpuid. core file
 * Contact:     mailto: <dembol@nasa.com.pl>
 *
 */

#include <agnix/agnix.h>

void cpuid(u32 level, u32 *eax, u32 *ebx, u32 *ecx, u32 *edx)
{
    asm("cpuid"
        :"=a"(*eax), "=b"(*ebx), "=c"(*ecx), "=d"(*edx)
        :"0"(level));
}

u32 cpuid_reg(u32 level, int reg_nr)
{
    u32 eax, ebx, ecx, edx;

    asm("cpuid"
        :"=a"(eax), "=b"(ebx), "=c"(ecx), "=d"(edx)
        :"0"(level));
    
    switch(reg_nr) {
        case 0: return eax;
        case 1: return ebx;
        case 2: return ecx;
        case 3: return edx;
    }

    return 0;
}