Linux 3.8-rc7
[cris-mirror.git] / arch / x86 / kernel / cpu / mcheck / winchip.c
blob2d7998fb628cb5679069b5ef50ba7d6e41a1c498
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>
10 #include <asm/processor.h>
11 #include <asm/mce.h>
12 #include <asm/msr.h>
14 /* Machine check handler for WinChip C6: */
15 static void winchip_machine_check(struct pt_regs *regs, long error_code)
17 printk(KERN_EMERG "CPU0: Machine Check Exception.\n");
18 add_taint(TAINT_MACHINE_CHECK);
21 /* Set up machine check reporting on the Winchip C6 series */
22 void winchip_mcheck_init(struct cpuinfo_x86 *c)
24 u32 lo, hi;
26 machine_check_vector = winchip_machine_check;
27 /* Make sure the vector pointer is visible before we enable MCEs: */
28 wmb();
30 rdmsr(MSR_IDT_FCR1, lo, hi);
31 lo |= (1<<2); /* Enable EIERRINT (int 18 MCE) */
32 lo &= ~(1<<4); /* Enable MCE */
33 wrmsr(MSR_IDT_FCR1, lo, hi);
35 set_in_cr4(X86_CR4_MCE);
37 printk(KERN_INFO
38 "Winchip machine check reporting enabled on CPU#0.\n");