150acfb2bSThomas Gleixner /* SPDX-License-Identifier: GPL-2.0-only */ 276d2a049SPalmer Dabbelt /* 376d2a049SPalmer Dabbelt * Copyright (C) 2012 Regents of the University of California 476d2a049SPalmer Dabbelt */ 576d2a049SPalmer Dabbelt 676d2a049SPalmer Dabbelt #ifndef _ASM_RISCV_BUG_H 776d2a049SPalmer Dabbelt #define _ASM_RISCV_BUG_H 876d2a049SPalmer Dabbelt 976d2a049SPalmer Dabbelt #include <linux/compiler.h> 1076d2a049SPalmer Dabbelt #include <linux/const.h> 1176d2a049SPalmer Dabbelt #include <linux/types.h> 1276d2a049SPalmer Dabbelt 1376d2a049SPalmer Dabbelt #include <asm/asm.h> 1476d2a049SPalmer Dabbelt 15ee72e0e7SVincent Chen #define __INSN_LENGTH_MASK _UL(0x3) 16ee72e0e7SVincent Chen #define __INSN_LENGTH_32 _UL(0x3) 17ee72e0e7SVincent Chen #define __COMPRESSED_INSN_MASK _UL(0xffff) 18ee72e0e7SVincent Chen 19ee72e0e7SVincent Chen #define __BUG_INSN_32 _UL(0x00100073) /* ebreak */ 20ee72e0e7SVincent Chen #define __BUG_INSN_16 _UL(0x9002) /* c.ebreak */ 2176d2a049SPalmer Dabbelt 2276d2a049SPalmer Dabbelt typedef u32 bug_insn_t; 2376d2a049SPalmer Dabbelt 2476d2a049SPalmer Dabbelt #ifdef CONFIG_GENERIC_BUG_RELATIVE_POINTERS 255e6f82b0SOlof Johansson #define __BUG_ENTRY_ADDR RISCV_INT " 1b - 2b" 265e6f82b0SOlof Johansson #define __BUG_ENTRY_FILE RISCV_INT " %0 - 2b" 2776d2a049SPalmer Dabbelt #else 2876d2a049SPalmer Dabbelt #define __BUG_ENTRY_ADDR RISCV_PTR " 1b" 2976d2a049SPalmer Dabbelt #define __BUG_ENTRY_FILE RISCV_PTR " %0" 3076d2a049SPalmer Dabbelt #endif 3176d2a049SPalmer Dabbelt 3276d2a049SPalmer Dabbelt #ifdef CONFIG_DEBUG_BUGVERBOSE 3376d2a049SPalmer Dabbelt #define __BUG_ENTRY \ 3476d2a049SPalmer Dabbelt __BUG_ENTRY_ADDR "\n\t" \ 3576d2a049SPalmer Dabbelt __BUG_ENTRY_FILE "\n\t" \ 36d18ebc27SVincent Chen RISCV_SHORT " %1\n\t" \ 37d18ebc27SVincent Chen RISCV_SHORT " %2" 3876d2a049SPalmer Dabbelt #else 3976d2a049SPalmer Dabbelt #define __BUG_ENTRY \ 40d18ebc27SVincent Chen __BUG_ENTRY_ADDR "\n\t" \ 41d18ebc27SVincent Chen RISCV_SHORT " %2" 4276d2a049SPalmer Dabbelt #endif 4376d2a049SPalmer Dabbelt 44a6d9e267SChristoph Hellwig #ifdef CONFIG_GENERIC_BUG 45d18ebc27SVincent Chen #define __BUG_FLAGS(flags) \ 4676d2a049SPalmer Dabbelt do { \ 4776d2a049SPalmer Dabbelt __asm__ __volatile__ ( \ 4876d2a049SPalmer Dabbelt "1:\n\t" \ 4976d2a049SPalmer Dabbelt "ebreak\n" \ 50d18ebc27SVincent Chen ".pushsection __bug_table,\"aw\"\n\t" \ 5176d2a049SPalmer Dabbelt "2:\n\t" \ 5276d2a049SPalmer Dabbelt __BUG_ENTRY "\n\t" \ 53d18ebc27SVincent Chen ".org 2b + %3\n\t" \ 5476d2a049SPalmer Dabbelt ".popsection" \ 5576d2a049SPalmer Dabbelt : \ 5676d2a049SPalmer Dabbelt : "i" (__FILE__), "i" (__LINE__), \ 57d18ebc27SVincent Chen "i" (flags), \ 5876d2a049SPalmer Dabbelt "i" (sizeof(struct bug_entry))); \ 5976d2a049SPalmer Dabbelt } while (0) 6076d2a049SPalmer Dabbelt #else /* CONFIG_GENERIC_BUG */ 61d18ebc27SVincent Chen #define __BUG_FLAGS(flags) do { \ 6276d2a049SPalmer Dabbelt __asm__ __volatile__ ("ebreak\n"); \ 6376d2a049SPalmer Dabbelt } while (0) 6476d2a049SPalmer Dabbelt #endif /* CONFIG_GENERIC_BUG */ 6576d2a049SPalmer Dabbelt 66d18ebc27SVincent Chen #define BUG() do { \ 67d18ebc27SVincent Chen __BUG_FLAGS(0); \ 68d18ebc27SVincent Chen unreachable(); \ 69d18ebc27SVincent Chen } while (0) 70d18ebc27SVincent Chen 71d18ebc27SVincent Chen #define __WARN_FLAGS(flags) __BUG_FLAGS(BUGFLAG_WARNING|(flags)) 72d18ebc27SVincent Chen 7376d2a049SPalmer Dabbelt #define HAVE_ARCH_BUG 7476d2a049SPalmer Dabbelt 7576d2a049SPalmer Dabbelt #include <asm-generic/bug.h> 7676d2a049SPalmer Dabbelt 7776d2a049SPalmer Dabbelt struct pt_regs; 7876d2a049SPalmer Dabbelt struct task_struct; 7976d2a049SPalmer Dabbelt 80a6d9e267SChristoph Hellwig void die(struct pt_regs *regs, const char *str); 81a6d9e267SChristoph Hellwig void do_trap(struct pt_regs *regs, int signo, int code, unsigned long addr); 8276d2a049SPalmer Dabbelt 8376d2a049SPalmer Dabbelt #endif /* _ASM_RISCV_BUG_H */ 84