LXR linux/arch/riscv/include/asm/bug.h

   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
  30typedef 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)                                      \
  54do {                                                            \
  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
  85struct pt_regs;
  86struct task_struct;
  87
  88void __show_regs(struct pt_regs *regs);
  89void die(struct pt_regs *regs, const char *str);
  90void do_trap(struct pt_regs *regs, int signo, int code, unsigned long addr);
  91
  92#endif /* _ASM_RISCV_BUG_H */
  93