1 files changed, 90 insertions, 0 deletions
diff --git a/arch/x86/kernel/cpu/mcheck/mce.c b/arch/x86/kernel/cpu/mcheck/mce.c
new file mode 100644
index 00000000000..34c781eddee
--- /dev/null
+++ b/arch/x86/kernel/cpu/mcheck/mce.c
@@ -0,0 +1,90 @@
+/*
+ * mce.c - x86 Machine Check Exception Reporting
+ * (c) 2002 Alan Cox <alan@redhat.com>, Dave Jones <davej@codemonkey.org.uk>
+ */
+
+#include <linux/init.h>
+#include <linux/types.h>
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/smp.h>
+#include <linux/thread_info.h>
+
+#include <asm/processor.h> 
+#include <asm/system.h>
+#include <asm/mce.h>
+
+#include "mce.h"
+
+int mce_disabled = 0;
+int nr_mce_banks;
+
+EXPORT_SYMBOL_GPL(nr_mce_banks);	/* non-fatal.o */
+
+/* Handle unconfigured int18 (should never happen) */
+static fastcall void unexpected_machine_check(struct pt_regs * regs, long error_code)
+{	
+	printk(KERN_ERR "CPU#%d: Unexpected int18 (Machine Check).\n", smp_processor_id());
+}
+
+/* Call the installed machine check handler for this CPU setup. */
+void fastcall (*machine_check_vector)(struct pt_regs *, long error_code) = unexpected_machine_check;
+
+/* This has to be run for each processor */
+void mcheck_init(struct cpuinfo_x86 *c)
+{
+	if (mce_disabled==1)
+		return;
+
+	switch (c->x86_vendor) {
+		case X86_VENDOR_AMD:
+			amd_mcheck_init(c);
+			break;
+
+		case X86_VENDOR_INTEL:
+			if (c->x86==5)
+				intel_p5_mcheck_init(c);
+			if (c->x86==6)
+				intel_p6_mcheck_init(c);
+			if (c->x86==15)
+				intel_p4_mcheck_init(c);
+			break;
+
+		case X86_VENDOR_CENTAUR:
+			if (c->x86==5)
+				winchip_mcheck_init(c);
+			break;
+
+		default:
+			break;
+	}
+}
+
+static unsigned long old_cr4 __initdata;
+
+void __init stop_mce(void)
+{
+	old_cr4 = read_cr4();
+	clear_in_cr4(X86_CR4_MCE);
+}
+
+void __init restart_mce(void)
+{
+	if (old_cr4 & X86_CR4_MCE)
+		set_in_cr4(X86_CR4_MCE);
+}
+
+static int __init mcheck_disable(char *str)
+{
+	mce_disabled = 1;
+	return 1;
+}
+
+static int __init mcheck_enable(char *str)
+{
+	mce_disabled = -1;
+	return 1;
+}
+
+__setup("nomce", mcheck_disable);
+__setup("mce", mcheck_enable);