arch/powerpc/platforms/8xx/machine_check.c

   1 /*
   2  * This program is free software; you can redistribute it and/or
   3  * modify it under the terms of the GNU General Public License
   4  * as published by the Free Software Foundation; either version
   5  * 2 of the License, or (at your option) any later version.
   6  */
   7
   8 #include <linux/kernel.h>
   9 #include <linux/printk.h>
  10 #include <linux/ptrace.h>
  11
  12 #include <asm/reg.h>
  13
  14 int machine_check_8xx(struct pt_regs *regs)
  15 {
  16         unsigned long reason = regs->msr;
  17
  18         pr_err("Machine check in kernel mode.\n");
  19         pr_err("Caused by (from SRR1=%lx): ", reason);
  20         if (reason & 0x40000000)
  21                 pr_cont("Fetch error at address %lx\n", regs->nip);
  22         else
  23                 pr_cont("Data access error at address %lx\n", regs->dar);
  24
  25 #ifdef CONFIG_PCI
  26         /* the qspan pci read routines can cause machine checks -- Cort
  27          *
  28          * yuck !!! that totally needs to go away ! There are better ways
  29          * to deal with that than having a wart in the mcheck handler.
  30          * -- BenH
  31          */
  32         bad_page_fault(regs, regs->dar, SIGBUS);
  33         return 1;
  34 #else
  35         return 0;
  36 #endif
  37 }