bugs_64.c

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/*
 *  Copyright (C) 1994  Linus Torvalds
 *  Copyright (C) 2000  SuSE
 */

#include <linux/kernel.h>
#include <linux/init.h>
#include <asm/alternative.h>
#include <asm/bugs.h>
#include <asm/processor.h>
#include <asm/mtrr.h>
#include <asm/cacheflush.h>

void __init check_bugs(void)
{
    identify_boot_cpu();
#if !defined(CONFIG_SMP)
    printk(KERN_INFO "CPU: ");
    print_cpu_info(&boot_cpu_data);
#endif
    alternative_instructions();

    /*
     * Make sure the first 2MB area is not mapped by huge pages
     * There are typically fixed size MTRRs in there and overlapping
     * MTRRs into large pages causes slow downs.
     *
     * Right now we don't do that with gbpages because there seems
     * very little benefit for that case.
     */
    if (!direct_gbpages)
        set_memory_4k((unsigned long)__va(0), 1);
}