arch/x86/kernel/cpu/mcheck/mce_32.c

   1 /*
   2  * mce.c - x86 Machine Check Exception Reporting
   3  * (c) 2002 Alan Cox <alan@lxorguk.ukuu.org.uk>, Dave Jones <davej@redhat.com>
   4  */
   5 #include <linux/thread_info.h>
   6 #include <linux/kernel.h>
   7 #include <linux/module.h>
   8 #include <linux/types.h>
   9 #include <linux/init.h>
  10 #include <linux/smp.h>
  11
  12 #include <asm/processor.h>
  13 #include <asm/system.h>
  14 #include <asm/mce.h>
  15
  16 #include "mce.h"
  17
  18 int mce_disabled;
  19
  20 int nr_mce_banks;
  21 EXPORT_SYMBOL_GPL(nr_mce_banks);        /* non-fatal.o */
  22
  23 /* Handle unconfigured int18 (should never happen) */
  24 static void unexpected_machine_check(struct pt_regs *regs, long error_code)
  25 {
  26         printk(KERN_ERR "CPU#%d: Unexpected int18 (Machine Check).\n",
  27                smp_processor_id());
  28 }
  29
  30 /* Call the installed machine check handler for this CPU setup. */
  31 void (*machine_check_vector)(struct pt_regs *, long error_code) =
  32                                                 unexpected_machine_check;
  33
  34 /* This has to be run for each processor */
  35 void mcheck_init(struct cpuinfo_x86 *c)
  36 {
  37         if (mce_disabled == 1)
  38                 return;
  39
  40         switch (c->x86_vendor) {
  41         case X86_VENDOR_AMD:
  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 1;
  68 }
  69
  70 static int __init mcheck_enable(char *str)
  71 {
  72         mce_disabled = -1;
  73         return 1;
  74 }
  75
  76 __setup("nomce", mcheck_disable);
  77 __setup("mce", mcheck_enable);