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 #ifdef CONFIG_GENERIC_BUG 16 #define __INSN_LENGTH_MASK _UL(0x3) 17 #define __INSN_LENGTH_32 _UL(0x3) 18 #define __COMPRESSED_INSN_MASK _UL(0xffff) 19 20 #define __BUG_INSN_32 _UL(0x00100073) /* ebreak */ 21 #define __BUG_INSN_16 _UL(0x9002) /* c.ebreak */ 22 23 #ifndef __ASSEMBLY__ 24 typedef u32 bug_insn_t; 25 26 #ifdef CONFIG_GENERIC_BUG_RELATIVE_POINTERS 27 #define __BUG_ENTRY_ADDR RISCV_INT " 1b - 2b" 28 #define __BUG_ENTRY_FILE RISCV_INT " %0 - 2b" 29 #else 30 #define __BUG_ENTRY_ADDR RISCV_PTR " 1b" 31 #define __BUG_ENTRY_FILE RISCV_PTR " %0" 32 #endif 33 34 #ifdef CONFIG_DEBUG_BUGVERBOSE 35 #define __BUG_ENTRY \ 36 __BUG_ENTRY_ADDR "\n\t" \ 37 __BUG_ENTRY_FILE "\n\t" \ 38 RISCV_SHORT " %1\n\t" \ 39 RISCV_SHORT " %2" 40 #else 41 #define __BUG_ENTRY \ 42 __BUG_ENTRY_ADDR "\n\t" \ 43 RISCV_SHORT " %2" 44 #endif 45 46 #define __BUG_FLAGS(flags) \ 47 do { \ 48 __asm__ __volatile__ ( \ 49 "1:\n\t" \ 50 "ebreak\n" \ 51 ".pushsection __bug_table,\"aw\"\n\t" \ 52 "2:\n\t" \ 53 __BUG_ENTRY "\n\t" \ 54 ".org 2b + %3\n\t" \ 55 ".popsection" \ 56 : \ 57 : "i" (__FILE__), "i" (__LINE__), \ 58 "i" (flags), \ 59 "i" (sizeof(struct bug_entry))); \ 60 } while (0) 61 62 #endif /* !__ASSEMBLY__ */ 63 #else /* CONFIG_GENERIC_BUG */ 64 #ifndef __ASSEMBLY__ 65 #define __BUG_FLAGS(flags) do { \ 66 __asm__ __volatile__ ("ebreak\n"); \ 67 } while (0) 68 #endif /* !__ASSEMBLY__ */ 69 #endif /* CONFIG_GENERIC_BUG */ 70 71 #define BUG() do { \ 72 __BUG_FLAGS(0); \ 73 unreachable(); \ 74 } while (0) 75 76 #define __WARN_FLAGS(flags) __BUG_FLAGS(BUGFLAG_WARNING|(flags)) 77 78 #define HAVE_ARCH_BUG 79 80 #include <asm-generic/bug.h> 81 82 #ifndef __ASSEMBLY__ 83 84 struct pt_regs; 85 struct task_struct; 86 87 extern void die(struct pt_regs *regs, const char *str); 88 extern void do_trap(struct pt_regs *regs, int signo, int code, 89 unsigned long addr, struct task_struct *tsk); 90 91 #endif /* !__ASSEMBLY__ */ 92 93 #endif /* _ASM_RISCV_BUG_H */ 94