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 1576d2a049SPalmer Dabbelt #ifdef CONFIG_GENERIC_BUG 16ee72e0e7SVincent Chen #define __INSN_LENGTH_MASK _UL(0x3) 17ee72e0e7SVincent Chen #define __INSN_LENGTH_32 _UL(0x3) 18ee72e0e7SVincent Chen #define __COMPRESSED_INSN_MASK _UL(0xffff) 19ee72e0e7SVincent Chen 20ee72e0e7SVincent Chen #define __BUG_INSN_32 _UL(0x00100073) /* ebreak */ 21ee72e0e7SVincent Chen #define __BUG_INSN_16 _UL(0x9002) /* c.ebreak */ 2276d2a049SPalmer Dabbelt 2376d2a049SPalmer Dabbelt #ifndef __ASSEMBLY__ 2476d2a049SPalmer Dabbelt typedef u32 bug_insn_t; 2576d2a049SPalmer Dabbelt 2676d2a049SPalmer Dabbelt #ifdef CONFIG_GENERIC_BUG_RELATIVE_POINTERS 275e6f82b0SOlof Johansson #define __BUG_ENTRY_ADDR RISCV_INT " 1b - 2b" 285e6f82b0SOlof Johansson #define __BUG_ENTRY_FILE RISCV_INT " %0 - 2b" 2976d2a049SPalmer Dabbelt #else 3076d2a049SPalmer Dabbelt #define __BUG_ENTRY_ADDR RISCV_PTR " 1b" 3176d2a049SPalmer Dabbelt #define __BUG_ENTRY_FILE RISCV_PTR " %0" 3276d2a049SPalmer Dabbelt #endif 3376d2a049SPalmer Dabbelt 3476d2a049SPalmer Dabbelt #ifdef CONFIG_DEBUG_BUGVERBOSE 3576d2a049SPalmer Dabbelt #define __BUG_ENTRY \ 3676d2a049SPalmer Dabbelt __BUG_ENTRY_ADDR "\n\t" \ 3776d2a049SPalmer Dabbelt __BUG_ENTRY_FILE "\n\t" \ 38d18ebc27SVincent Chen RISCV_SHORT " %1\n\t" \ 39d18ebc27SVincent Chen RISCV_SHORT " %2" 4076d2a049SPalmer Dabbelt #else 4176d2a049SPalmer Dabbelt #define __BUG_ENTRY \ 42d18ebc27SVincent Chen __BUG_ENTRY_ADDR "\n\t" \ 43d18ebc27SVincent Chen RISCV_SHORT " %2" 4476d2a049SPalmer Dabbelt #endif 4576d2a049SPalmer Dabbelt 46d18ebc27SVincent Chen #define __BUG_FLAGS(flags) \ 4776d2a049SPalmer Dabbelt do { \ 4876d2a049SPalmer Dabbelt __asm__ __volatile__ ( \ 4976d2a049SPalmer Dabbelt "1:\n\t" \ 5076d2a049SPalmer Dabbelt "ebreak\n" \ 51d18ebc27SVincent Chen ".pushsection __bug_table,\"aw\"\n\t" \ 5276d2a049SPalmer Dabbelt "2:\n\t" \ 5376d2a049SPalmer Dabbelt __BUG_ENTRY "\n\t" \ 54d18ebc27SVincent Chen ".org 2b + %3\n\t" \ 5576d2a049SPalmer Dabbelt ".popsection" \ 5676d2a049SPalmer Dabbelt : \ 5776d2a049SPalmer Dabbelt : "i" (__FILE__), "i" (__LINE__), \ 58d18ebc27SVincent Chen "i" (flags), \ 5976d2a049SPalmer Dabbelt "i" (sizeof(struct bug_entry))); \ 6076d2a049SPalmer Dabbelt } while (0) 61d18ebc27SVincent Chen 6276d2a049SPalmer Dabbelt #endif /* !__ASSEMBLY__ */ 6376d2a049SPalmer Dabbelt #else /* CONFIG_GENERIC_BUG */ 6476d2a049SPalmer Dabbelt #ifndef __ASSEMBLY__ 65d18ebc27SVincent Chen #define __BUG_FLAGS(flags) do { \ 6676d2a049SPalmer Dabbelt __asm__ __volatile__ ("ebreak\n"); \ 6776d2a049SPalmer Dabbelt } while (0) 6876d2a049SPalmer Dabbelt #endif /* !__ASSEMBLY__ */ 6976d2a049SPalmer Dabbelt #endif /* CONFIG_GENERIC_BUG */ 7076d2a049SPalmer Dabbelt 71d18ebc27SVincent Chen #define BUG() do { \ 72d18ebc27SVincent Chen __BUG_FLAGS(0); \ 73d18ebc27SVincent Chen unreachable(); \ 74d18ebc27SVincent Chen } while (0) 75d18ebc27SVincent Chen 76d18ebc27SVincent Chen #define __WARN_FLAGS(flags) __BUG_FLAGS(BUGFLAG_WARNING|(flags)) 77d18ebc27SVincent Chen 7876d2a049SPalmer Dabbelt #define HAVE_ARCH_BUG 7976d2a049SPalmer Dabbelt 8076d2a049SPalmer Dabbelt #include <asm-generic/bug.h> 8176d2a049SPalmer Dabbelt 8276d2a049SPalmer Dabbelt #ifndef __ASSEMBLY__ 8376d2a049SPalmer Dabbelt 8476d2a049SPalmer Dabbelt struct pt_regs; 8576d2a049SPalmer Dabbelt struct task_struct; 8676d2a049SPalmer Dabbelt 8776d2a049SPalmer Dabbelt extern void die(struct pt_regs *regs, const char *str); 8876d2a049SPalmer Dabbelt extern void do_trap(struct pt_regs *regs, int signo, int code, 8976d2a049SPalmer Dabbelt unsigned long addr, struct task_struct *tsk); 9076d2a049SPalmer Dabbelt 9176d2a049SPalmer Dabbelt #endif /* !__ASSEMBLY__ */ 9276d2a049SPalmer Dabbelt 9376d2a049SPalmer Dabbelt #endif /* _ASM_RISCV_BUG_H */ 94