arch/i386/kernel/cpu/mcheck/mce.c

   1 /*
   2  * mce.c - x86 Machine Check Exception Reporting
   3  * (c) 2002 Alan Cox <alan@redhat.com>, Dave Jones <davej@codemonkey.org.uk>
   4  */
   5
   6 #include <linux/init.h>
   7 #include <linux/types.h>
   8 #include <linux/kernel.h>
   9 #include <linux/module.h>
  10 #include <linux/smp.h>
  11 #include <linux/thread_info.h>
  12
  13 #include <asm/processor.h>
  14 #include <asm/system.h>
  15
  16 #include "mce.h"
  17
  18 int mce_disabled = 0;
  19 int nr_mce_banks;
  20
  21 EXPORT_SYMBOL_GPL(nr_mce_banks);        /* non-fatal.o */
  22
  23 /* Handle unconfigured int18 (should never happen) */
  24 static fastcall void unexpected_machine_check(struct pt_regs * regs, long error_code)
  25 {
  26         printk(KERN_ERR "CPU#%d: Unexpected int18 (Machine Check).\n", smp_processor_id());
  27 }
  28
  29 /* Call the installed machine check handler for this CPU setup. */
  30 void fastcall (*machine_check_vector)(struct pt_regs *, long error_code) = unexpected_machine_check;
  31
  32 /* This has to be run for each processor */
  33 void mcheck_init(struct cpuinfo_x86 *c)
  34 {
  35         if (mce_disabled==1)
  36                 return;
  37
  38         switch (c->x86_vendor) {
  39                 case X86_VENDOR_AMD:
  40                         if (c->x86==6 || c->x86==15)
  41                                 amd_mcheck_init(c);
  42                         break;
  43
  44                 case X86_VENDOR_INTEL:
  45                         if (c->x86==5)
  46                                 intel_p5_mcheck_init(c);
  47                         if (c->x86==6)
  48                                 intel_p6_mcheck_init(c);
  49                         if (c->x86==15)
  50                                 intel_p4_mcheck_init(c);
  51                         break;
  52
  53                 case X86_VENDOR_CENTAUR:
  54                         if (c->x86==5)
  55                                 winchip_mcheck_init(c);
  56                         break;
  57
  58                 default:
  59                         break;
  60         }
  61 }
  62
  63 static int __init mcheck_disable(char *str)
  64 {
  65         mce_disabled = 1;
  66         return 1;
  67 }
  68
  69 static int __init mcheck_enable(char *str)
  70 {
  71         mce_disabled = -1;
  72         return 1;
  73 }
  74
  75 __setup("nomce", mcheck_disable);
  76 __setup("mce", mcheck_enable);