1 /* SPDX-License-Identifier: GPL-2.0-only */ 2 /* 3 * Copyright (C) 2012 Regents of the University of California 4 */ 5 6 #ifndef _ASM_RISCV_BUG_H 7 #define _ASM_RISCV_BUG_H 8 9 #include <linux/compiler.h> 10 #include <linux/const.h> 11 #include <linux/types.h> 12 13 #include <asm/asm.h> 14 15 #define __INSN_LENGTH_MASK _UL(0x3) 16 #define __INSN_LENGTH_32 _UL(0x3) 17 #define __COMPRESSED_INSN_MASK _UL(0xffff) 18 19 #define __BUG_INSN_32 _UL(0x00100073) /* ebreak */ 20 #define __BUG_INSN_16 _UL(0x9002) /* c.ebreak */ 21 22 typedef u32 bug_insn_t; 23 24 #ifdef CONFIG_GENERIC_BUG_RELATIVE_POINTERS 25 #define __BUG_ENTRY_ADDR RISCV_INT " 1b - 2b" 26 #define __BUG_ENTRY_FILE RISCV_INT " %0 - 2b" 27 #else 28 #define __BUG_ENTRY_ADDR RISCV_PTR " 1b" 29 #define __BUG_ENTRY_FILE RISCV_PTR " %0" 30 #endif 31 32 #ifdef CONFIG_DEBUG_BUGVERBOSE 33 #define __BUG_ENTRY \ 34 __BUG_ENTRY_ADDR "\n\t" \ 35 __BUG_ENTRY_FILE "\n\t" \ 36 RISCV_SHORT " %1\n\t" \ 37 RISCV_SHORT " %2" 38 #else 39 #define __BUG_ENTRY \ 40 __BUG_ENTRY_ADDR "\n\t" \ 41 RISCV_SHORT " %2" 42 #endif 43 44 #ifdef CONFIG_GENERIC_BUG 45 #define __BUG_FLAGS(flags) \ 46 do { \ 47 __asm__ __volatile__ ( \ 48 "1:\n\t" \ 49 "ebreak\n" \ 50 ".pushsection __bug_table,\"aw\"\n\t" \ 51 "2:\n\t" \ 52 __BUG_ENTRY "\n\t" \ 53 ".org 2b + %3\n\t" \ 54 ".popsection" \ 55 : \ 56 : "i" (__FILE__), "i" (__LINE__), \ 57 "i" (flags), \ 58 "i" (sizeof(struct bug_entry))); \ 59 } while (0) 60 #else /* CONFIG_GENERIC_BUG */ 61 #define __BUG_FLAGS(flags) do { \ 62 __asm__ __volatile__ ("ebreak\n"); \ 63 } while (0) 64 #endif /* CONFIG_GENERIC_BUG */ 65 66 #define BUG() do { \ 67 __BUG_FLAGS(0); \ 68 unreachable(); \ 69 } while (0) 70 71 #define __WARN_FLAGS(flags) __BUG_FLAGS(BUGFLAG_WARNING|(flags)) 72 73 #define HAVE_ARCH_BUG 74 75 #include <asm-generic/bug.h> 76 77 struct pt_regs; 78 struct task_struct; 79 80 void die(struct pt_regs *regs, const char *str); 81 void do_trap(struct pt_regs *regs, int signo, int code, unsigned long addr); 82 83 #endif /* _ASM_RISCV_BUG_H */ 84