1 files changed, 99 insertions, 0 deletions
diff --git a/arch/riscv/include/asm/bug.h b/arch/riscv/include/asm/bug.h
new file mode 100644
index 000000000000..6f581b84d8fc
--- /dev/null
+++ b/arch/riscv/include/asm/bug.h
@@ -0,0 +1,99 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
+/*
+ * Copyright (C) 2012 Regents of the University of California
+ */
+
+#ifndef _ASM_RISCV_BUG_H
+#define _ASM_RISCV_BUG_H
+
+#include <linux/compiler.h>
+#include <linux/const.h>
+#include <linux/types.h>
+
+#include <asm/asm.h>
+
+#define __INSN_LENGTH_MASK  _UL(0x3)
+#define __INSN_LENGTH_32    _UL(0x3)
+#define __COMPRESSED_INSN_MASK	_UL(0xffff)
+
+#define __BUG_INSN_32	_UL(0x00100073) /* ebreak */
+#define __BUG_INSN_16	_UL(0x9002) /* c.ebreak */
+
+#define GET_INSN_LENGTH(insn)						\
+({									\
+	unsigned long __len;						\
+	__len = ((insn & __INSN_LENGTH_MASK) == __INSN_LENGTH_32) ?	\
+		4UL : 2UL;						\
+	__len;								\
+})
+
+typedef u32 bug_insn_t;
+
+#ifdef CONFIG_GENERIC_BUG_RELATIVE_POINTERS
+#define __BUG_ENTRY_ADDR	RISCV_INT " 1b - ."
+#define __BUG_ENTRY_FILE(file)	RISCV_INT " " file " - ."
+#else
+#define __BUG_ENTRY_ADDR	RISCV_PTR " 1b"
+#define __BUG_ENTRY_FILE(file)	RISCV_PTR " " file
+#endif
+
+#ifdef CONFIG_DEBUG_BUGVERBOSE
+#define __BUG_ENTRY(file, line, flags)	\
+	__BUG_ENTRY_ADDR "\n\t"		\
+	__BUG_ENTRY_FILE(file) "\n\t"	\
+	RISCV_SHORT " " line "\n\t"	\
+	RISCV_SHORT " " flags
+#else
+#define __BUG_ENTRY(file, line, flags)		\
+	__BUG_ENTRY_ADDR "\n\t"			\
+	RISCV_SHORT " " flags
+#endif
+
+#ifdef CONFIG_GENERIC_BUG
+
+#define ARCH_WARN_ASM(file, line, flags, size)			\
+		"1:\n\t"					\
+			"ebreak\n"				\
+			".pushsection __bug_table,\"aw\"\n\t"	\
+		"2:\n\t"					\
+		__BUG_ENTRY(file, line, flags) "\n\t"		\
+			".org 2b + " size "\n\t"                \
+			".popsection"				\
+
+#define __BUG_FLAGS(cond_str, flags)				\
+do {								\
+	__asm__ __volatile__ (					\
+		ARCH_WARN_ASM("%0", "%1", "%2", "%3")		\
+		:						\
+		: "i" (WARN_CONDITION_STR(cond_str) __FILE__), "i" (__LINE__),	\
+		  "i" (flags),					\
+		  "i" (sizeof(struct bug_entry)));              \
+} while (0)
+
+#else /* CONFIG_GENERIC_BUG */
+#define __BUG_FLAGS(cond_str, flags) do {			\
+	__asm__ __volatile__ ("ebreak\n");			\
+} while (0)
+#endif /* CONFIG_GENERIC_BUG */
+
+#define BUG() do {						\
+	__BUG_FLAGS("", 0);					\
+	unreachable();						\
+} while (0)
+
+#define __WARN_FLAGS(cond_str, flags) __BUG_FLAGS(cond_str, BUGFLAG_WARNING|(flags))
+
+#define ARCH_WARN_REACHABLE
+
+#define HAVE_ARCH_BUG
+
+#include <asm-generic/bug.h>
+
+struct pt_regs;
+struct task_struct;
+
+void __show_regs(struct pt_regs *regs);
+void die(struct pt_regs *regs, const char *str);
+void do_trap(struct pt_regs *regs, int signo, int code, unsigned long addr);
+
+#endif /* _ASM_RISCV_BUG_H */