1/* 2 * IDT Winchip specific Machine Check Exception Reporting 3 * (C) Copyright 2002 Alan Cox <alan@lxorguk.ukuu.org.uk> 4 */ 5#include <linux/interrupt.h> 6#include <linux/kernel.h> 7#include <linux/types.h> 8#include <linux/init.h> 9 10#include <asm/processor.h> 11#include <asm/system.h> 12#include <asm/mce.h> 13#include <asm/msr.h> 14 15/* Machine check handler for WinChip C6: */ 16static void winchip_machine_check(struct pt_regs *regs, long error_code) 17{ 18 printk(KERN_EMERG "CPU0: Machine Check Exception.\n"); 19 add_taint(TAINT_MACHINE_CHECK); 20} 21 22/* Set up machine check reporting on the Winchip C6 series */ 23void winchip_mcheck_init(struct cpuinfo_x86 *c) 24{ 25 u32 lo, hi; 26 27 machine_check_vector = winchip_machine_check; 28 /* Make sure the vector pointer is visible before we enable MCEs: */ 29 wmb(); 30 31 rdmsr(MSR_IDT_FCR1, lo, hi); 32 lo |= (1<<2); /* Enable EIERRINT (int 18 MCE) */ 33 lo &= ~(1<<4); /* Enable MCE */ 34 wrmsr(MSR_IDT_FCR1, lo, hi); 35 36 set_in_cr4(X86_CR4_MCE); 37 38 printk(KERN_INFO 39 "Winchip machine check reporting enabled on CPU#0.\n"); 40} 41