diff options
Diffstat (limited to 'arch/x86/kernel/cpu/mcheck/winchip.c')
| -rw-r--r-- | arch/x86/kernel/cpu/mcheck/winchip.c | 39 |
1 files changed, 39 insertions, 0 deletions
diff --git a/arch/x86/kernel/cpu/mcheck/winchip.c b/arch/x86/kernel/cpu/mcheck/winchip.c new file mode 100644 index 00000000..2d7998fb --- /dev/null +++ b/arch/x86/kernel/cpu/mcheck/winchip.c @@ -0,0 +1,39 @@ +/* + * IDT Winchip specific Machine Check Exception Reporting + * (C) Copyright 2002 Alan Cox <alan@lxorguk.ukuu.org.uk> + */ +#include <linux/interrupt.h> +#include <linux/kernel.h> +#include <linux/types.h> +#include <linux/init.h> + +#include <asm/processor.h> +#include <asm/mce.h> +#include <asm/msr.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; + /* Make sure the vector pointer is visible before we enable MCEs: */ + 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"); +} |