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-rw-r--r--arch/riscv/include/asm/bug.h92
1 files changed, 92 insertions, 0 deletions
diff --git a/arch/riscv/include/asm/bug.h b/arch/riscv/include/asm/bug.h
new file mode 100644
index 0000000000..1aaea81fb1
--- /dev/null
+++ b/arch/riscv/include/asm/bug.h
@@ -0,0 +1,92 @@
+/* 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 RISCV_INT " %0 - ."
+#else
+#define __BUG_ENTRY_ADDR RISCV_PTR " 1b"
+#define __BUG_ENTRY_FILE RISCV_PTR " %0"
+#endif
+
+#ifdef CONFIG_DEBUG_BUGVERBOSE
+#define __BUG_ENTRY \
+ __BUG_ENTRY_ADDR "\n\t" \
+ __BUG_ENTRY_FILE "\n\t" \
+ RISCV_SHORT " %1\n\t" \
+ RISCV_SHORT " %2"
+#else
+#define __BUG_ENTRY \
+ __BUG_ENTRY_ADDR "\n\t" \
+ RISCV_SHORT " %2"
+#endif
+
+#ifdef CONFIG_GENERIC_BUG
+#define __BUG_FLAGS(flags) \
+do { \
+ __asm__ __volatile__ ( \
+ "1:\n\t" \
+ "ebreak\n" \
+ ".pushsection __bug_table,\"aw\"\n\t" \
+ "2:\n\t" \
+ __BUG_ENTRY "\n\t" \
+ ".org 2b + %3\n\t" \
+ ".popsection" \
+ : \
+ : "i" (__FILE__), "i" (__LINE__), \
+ "i" (flags), \
+ "i" (sizeof(struct bug_entry))); \
+} while (0)
+#else /* CONFIG_GENERIC_BUG */
+#define __BUG_FLAGS(flags) do { \
+ __asm__ __volatile__ ("ebreak\n"); \
+} while (0)
+#endif /* CONFIG_GENERIC_BUG */
+
+#define BUG() do { \
+ __BUG_FLAGS(0); \
+ unreachable(); \
+} while (0)
+
+#define __WARN_FLAGS(flags) __BUG_FLAGS(BUGFLAG_WARNING|(flags))
+
+#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 */