root/arch/x86/kernel/cpu/mcheck/winchip.c

DEFINITIONS

1. winchip_machine_check
2. winchip_mcheck_init

/*
 * IDT Winchip specific Machine Check Exception Reporting
 * (C) Copyright 2002 Alan Cox <alan@redhat.com>
 */

#include <linux/init.h>
#include <linux/types.h>
#include <linux/kernel.h>
#include <linux/interrupt.h>

#include <asm/processor.h>
#include <asm/system.h>
#include <asm/msr.h>

#include "mce.h"

/* Machine check handler for WinChip C6 */
static void winchip_machine_check(struct pt_regs *regs, long error_code)
{
        printk(KERN_EMERG "CPU0: Machine Check Exception.\n");
        add_taint(TAINT_MACHINE_CHECK);
}

/* Set up machine check reporting on the Winchip C6 series */
void winchip_mcheck_init(struct cpuinfo_x86 *c)
{
        u32 lo, hi;
        machine_check_vector = winchip_machine_check;
        wmb();
        rdmsr(MSR_IDT_FCR1, lo, hi);
        lo |= (1<<2);   /* Enable EIERRINT (int 18 MCE) */
        lo &= ~(1<<4);  /* Enable MCE */
        wrmsr(MSR_IDT_FCR1, lo, hi);
        set_in_cr4(X86_CR4_MCE);
        printk(KERN_INFO "Winchip machine check reporting enabled on CPU#0.\n");
}