1 /* 2 * Copyright (C) 2012 Regents of the University of California 3 * 4 * This program is free software; you can redistribute it and/or 5 * modify it under the terms of the GNU General Public License 6 * as published by the Free Software Foundation, version 2. 7 * 8 * This program is distributed in the hope that it will be useful, 9 * but WITHOUT ANY WARRANTY; without even the implied warranty of 10 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 11 * GNU General Public License for more details. 12 */ 13 14 #ifndef _ASM_RISCV_BUG_H 15 #define _ASM_RISCV_BUG_H 16 17 #include <linux/compiler.h> 18 #include <linux/const.h> 19 #include <linux/types.h> 20 21 #include <asm/asm.h> 22 23 #ifdef CONFIG_GENERIC_BUG 24 #define __BUG_INSN _AC(0x00100073, UL) /* ebreak */ 25 26 #ifndef __ASSEMBLY__ 27 typedef u32 bug_insn_t; 28 29 #ifdef CONFIG_GENERIC_BUG_RELATIVE_POINTERS 30 #define __BUG_ENTRY_ADDR INT " 1b - 2b" 31 #define __BUG_ENTRY_FILE INT " %0 - 2b" 32 #else 33 #define __BUG_ENTRY_ADDR RISCV_PTR " 1b" 34 #define __BUG_ENTRY_FILE RISCV_PTR " %0" 35 #endif 36 37 #ifdef CONFIG_DEBUG_BUGVERBOSE 38 #define __BUG_ENTRY \ 39 __BUG_ENTRY_ADDR "\n\t" \ 40 __BUG_ENTRY_FILE "\n\t" \ 41 SHORT " %1" 42 #else 43 #define __BUG_ENTRY \ 44 __BUG_ENTRY_ADDR 45 #endif 46 47 #define BUG() \ 48 do { \ 49 __asm__ __volatile__ ( \ 50 "1:\n\t" \ 51 "ebreak\n" \ 52 ".pushsection __bug_table,\"a\"\n\t" \ 53 "2:\n\t" \ 54 __BUG_ENTRY "\n\t" \ 55 ".org 2b + %2\n\t" \ 56 ".popsection" \ 57 : \ 58 : "i" (__FILE__), "i" (__LINE__), \ 59 "i" (sizeof(struct bug_entry))); \ 60 unreachable(); \ 61 } while (0) 62 #endif /* !__ASSEMBLY__ */ 63 #else /* CONFIG_GENERIC_BUG */ 64 #ifndef __ASSEMBLY__ 65 #define BUG() \ 66 do { \ 67 __asm__ __volatile__ ("ebreak\n"); \ 68 unreachable(); \ 69 } while (0) 70 #endif /* !__ASSEMBLY__ */ 71 #endif /* CONFIG_GENERIC_BUG */ 72 73 #define HAVE_ARCH_BUG 74 75 #include <asm-generic/bug.h> 76 77 #ifndef __ASSEMBLY__ 78 79 struct pt_regs; 80 struct task_struct; 81 82 extern void die(struct pt_regs *regs, const char *str); 83 extern void do_trap(struct pt_regs *regs, int signo, int code, 84 unsigned long addr, struct task_struct *tsk); 85 86 #endif /* !__ASSEMBLY__ */ 87 88 #endif /* _ASM_RISCV_BUG_H */ 89