1*4882a593Smuzhiyun // SPDX-License-Identifier: GPL-2.0-or-later 2*4882a593Smuzhiyun /* 3*4882a593Smuzhiyun */ 4*4882a593Smuzhiyun 5*4882a593Smuzhiyun #include <linux/kernel.h> 6*4882a593Smuzhiyun #include <linux/printk.h> 7*4882a593Smuzhiyun #include <linux/ptrace.h> 8*4882a593Smuzhiyun 9*4882a593Smuzhiyun #include <asm/reg.h> 10*4882a593Smuzhiyun machine_check_8xx(struct pt_regs * regs)11*4882a593Smuzhiyunint machine_check_8xx(struct pt_regs *regs) 12*4882a593Smuzhiyun { 13*4882a593Smuzhiyun unsigned long reason = regs->msr; 14*4882a593Smuzhiyun 15*4882a593Smuzhiyun pr_err("Machine check in kernel mode.\n"); 16*4882a593Smuzhiyun pr_err("Caused by (from SRR1=%lx): ", reason); 17*4882a593Smuzhiyun if (reason & 0x40000000) 18*4882a593Smuzhiyun pr_cont("Fetch error at address %lx\n", regs->nip); 19*4882a593Smuzhiyun else 20*4882a593Smuzhiyun pr_cont("Data access error at address %lx\n", regs->dar); 21*4882a593Smuzhiyun 22*4882a593Smuzhiyun #ifdef CONFIG_PCI 23*4882a593Smuzhiyun /* the qspan pci read routines can cause machine checks -- Cort 24*4882a593Smuzhiyun * 25*4882a593Smuzhiyun * yuck !!! that totally needs to go away ! There are better ways 26*4882a593Smuzhiyun * to deal with that than having a wart in the mcheck handler. 27*4882a593Smuzhiyun * -- BenH 28*4882a593Smuzhiyun */ 29*4882a593Smuzhiyun bad_page_fault(regs, regs->dar, SIGBUS); 30*4882a593Smuzhiyun return 1; 31*4882a593Smuzhiyun #else 32*4882a593Smuzhiyun return 0; 33*4882a593Smuzhiyun #endif 34*4882a593Smuzhiyun } 35