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 } 35