libcaca/kernel/drivers/processor.c

/* 
 *  processor.c
 *  
 *
 *  Created by Jean-Yves Lamoureux on 12/19/09.
 *  Copyright 2009 Frob. All rights reserved.
 *
 */
#include "kernel.h"
#include "klibc.h"
#include "processor.h"


int processor_get_info(struct processor_info *processor_info)
{
    /* Vendor String */
    int code = CPUID_GETVENDORSTRING;
    unsigned int where[5];
    char *s;
    asm volatile ("cpuid":"=a" (*where), "=b"(*(where + 1)),
                  "=c"(*(where + 2)), "=d"(*(where + 3)):"0"(code));

    s = (char *)where;

    unsigned int a = 0;
    unsigned int b = where[1];
    unsigned int d = where[3];
    unsigned int c = where[2];

    where[0] = b;
    where[1] = d;
    where[2] = c;
    where[3] = 0;

    memcpy(processor_info->vendor, where, 13);

    /* Features */
    code = CPUID_GETFEATURES;
    asm volatile ("cpuid":"=a" (a), "=d"(d):"0"(code):"ecx", "ebx");
    processor_info->features = a;

    return 0;
}

void processor_print_info(struct processor_info *processor_info)
{
    printf("CPU%d\n", processor_info->id);
    printf("Vendor ID : %s\n", processor_info->vendor);
    printf("Features : 0x%x\n", processor_info->features);
}