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 #define GET_INSN_LENGTH(insn) \ 23 ({ \ 24 unsigned long __len; \ 25 __len = ((insn & __INSN_LENGTH_MASK) == __INSN_LENGTH_32) ? \ 26 4UL : 2UL; \ 27 __len; \ 28 }) 29 30 typedef u32 bug_insn_t; 31 32 #ifdef CONFIG_GENERIC_BUG_RELATIVE_POINTERS 33 #define __BUG_ENTRY_ADDR RISCV_INT " 1b - 2b" 34 #define __BUG_ENTRY_FILE RISCV_INT " %0 - 2b" 35 #else 36 #define __BUG_ENTRY_ADDR RISCV_PTR " 1b" 37 #define __BUG_ENTRY_FILE RISCV_PTR " %0" 38 #endif 39 40 #ifdef CONFIG_DEBUG_BUGVERBOSE 41 #define __BUG_ENTRY \ 42 __BUG_ENTRY_ADDR "\n\t" \ 43 __BUG_ENTRY_FILE "\n\t" \ 44 RISCV_SHORT " %1\n\t" \ 45 RISCV_SHORT " %2" 46 #else 47 #define __BUG_ENTRY \ 48 __BUG_ENTRY_ADDR "\n\t" \ 49 RISCV_SHORT " %2" 50 #endif 51 52 #ifdef CONFIG_GENERIC_BUG 53 #define __BUG_FLAGS(flags) \ 54 do { \ 55 __asm__ __volatile__ ( \ 56 "1:\n\t" \ 57 "ebreak\n" \ 58 ".pushsection __bug_table,\"aw\"\n\t" \ 59 "2:\n\t" \ 60 __BUG_ENTRY "\n\t" \ 61 ".org 2b + %3\n\t" \ 62 ".popsection" \ 63 : \ 64 : "i" (__FILE__), "i" (__LINE__), \ 65 "i" (flags), \ 66 "i" (sizeof(struct bug_entry))); \ 67 } while (0) 68 #else /* CONFIG_GENERIC_BUG */ 69 #define __BUG_FLAGS(flags) do { \ 70 __asm__ __volatile__ ("ebreak\n"); \ 71 } while (0) 72 #endif /* CONFIG_GENERIC_BUG */ 73 74 #define BUG() do { \ 75 __BUG_FLAGS(0); \ 76 unreachable(); \ 77 } while (0) 78 79 #define __WARN_FLAGS(flags) __BUG_FLAGS(BUGFLAG_WARNING|(flags)) 80 81 #define HAVE_ARCH_BUG 82 83 #include <asm-generic/bug.h> 84 85 struct pt_regs; 86 struct task_struct; 87 88 void __show_regs(struct pt_regs *regs); 89 void die(struct pt_regs *regs, const char *str); 90 void do_trap(struct pt_regs *regs, int signo, int code, unsigned long addr); 91 92 #endif /* _ASM_RISCV_BUG_H */ 93