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linux-7.2.3/arch/powerpc/platforms/8xx/machine_check.c

@@ -0,0 +1,34 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+/*
+ */
+
+#include <linux/kernel.h>
+#include <linux/printk.h>
+#include <linux/ptrace.h>
+
+#include <asm/reg.h>
+
+int machine_check_8xx(struct pt_regs *regs)
+{
+	unsigned long reason = regs->msr;
+
+	pr_err("Machine check in kernel mode.\n");
+	pr_err("Caused by (from SRR1=%lx): ", reason);
+	if (reason & 0x40000000)
+		pr_cont("Fetch error at address %lx\n", regs->nip);
+	else
+		pr_cont("Data access error at address %lx\n", regs->dar);
+
+#ifdef CONFIG_PCI
+	/* the qspan pci read routines can cause machine checks -- Cort
+	 *
+	 * yuck !!! that totally needs to go away ! There are better ways
+	 * to deal with that than having a wart in the mcheck handler.
+	 * -- BenH
+	 */
+	bad_page_fault(regs, SIGBUS);
+	return 1;
+#else
+	return 0;
+#endif
+}