Linux-2.6.12-rc2
[linux-3.10.git] / 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);