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

   1 // SPDX-License-Identifier: GPL-2.0-or-later
   2 /*
   3  */
   4
   5 #include <linux/kernel.h>
   6 #include <linux/printk.h>
   7 #include <linux/ptrace.h>
   8
   9 #include <asm/reg.h>
  10
  11 int machine_check_8xx(struct pt_regs *regs)
  12 {
  13         unsigned long reason = regs->msr;
  14
  15         pr_err("Machine check in kernel mode.\n");
  16         pr_err("Caused by (from SRR1=%lx): ", reason);
  17         if (reason & 0x40000000)
  18                 pr_cont("Fetch error at address %lx\n", regs->nip);
  19         else
  20                 pr_cont("Data access error at address %lx\n", regs->dar);
  21
  22 #ifdef CONFIG_PCI
  23         /* the qspan pci read routines can cause machine checks -- Cort
  24          *
  25          * yuck !!! that totally needs to go away ! There are better ways
  26          * to deal with that than having a wart in the mcheck handler.
  27          * -- BenH
  28          */
  29         bad_page_fault(regs, regs->dar, SIGBUS);
  30         return 1;
  31 #else
  32         return 0;
  33 #endif
  34 }