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