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