162306a36Sopenharmony_ci// SPDX-License-Identifier: GPL-2.0-or-later 262306a36Sopenharmony_ci/* 362306a36Sopenharmony_ci */ 462306a36Sopenharmony_ci 562306a36Sopenharmony_ci#include <linux/kernel.h> 662306a36Sopenharmony_ci#include <linux/printk.h> 762306a36Sopenharmony_ci#include <linux/ptrace.h> 862306a36Sopenharmony_ci 962306a36Sopenharmony_ci#include <asm/reg.h> 1062306a36Sopenharmony_ci 1162306a36Sopenharmony_ciint machine_check_8xx(struct pt_regs *regs) 1262306a36Sopenharmony_ci{ 1362306a36Sopenharmony_ci unsigned long reason = regs->msr; 1462306a36Sopenharmony_ci 1562306a36Sopenharmony_ci pr_err("Machine check in kernel mode.\n"); 1662306a36Sopenharmony_ci pr_err("Caused by (from SRR1=%lx): ", reason); 1762306a36Sopenharmony_ci if (reason & 0x40000000) 1862306a36Sopenharmony_ci pr_cont("Fetch error at address %lx\n", regs->nip); 1962306a36Sopenharmony_ci else 2062306a36Sopenharmony_ci pr_cont("Data access error at address %lx\n", regs->dar); 2162306a36Sopenharmony_ci 2262306a36Sopenharmony_ci#ifdef CONFIG_PCI 2362306a36Sopenharmony_ci /* the qspan pci read routines can cause machine checks -- Cort 2462306a36Sopenharmony_ci * 2562306a36Sopenharmony_ci * yuck !!! that totally needs to go away ! There are better ways 2662306a36Sopenharmony_ci * to deal with that than having a wart in the mcheck handler. 2762306a36Sopenharmony_ci * -- BenH 2862306a36Sopenharmony_ci */ 2962306a36Sopenharmony_ci bad_page_fault(regs, SIGBUS); 3062306a36Sopenharmony_ci return 1; 3162306a36Sopenharmony_ci#else 3262306a36Sopenharmony_ci return 0; 3362306a36Sopenharmony_ci#endif 3462306a36Sopenharmony_ci} 35