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
11int 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, SIGBUS);
30	return 1;
31#else
32	return 0;
33#endif
34}