LXR linux/arch/mips/kernel/probes-common.h

   1/* SPDX-License-Identifier: GPL-2.0-or-later */
   2/*
   3 * Copyright (C) 2016 Imagination Technologies
   4 * Author: Marcin Nowakowski <marcin.nowakowski@mips.com>
   5 */
   6
   7#ifndef __PROBES_COMMON_H
   8#define __PROBES_COMMON_H
   9
  10#include <asm/inst.h>
  11
  12int __insn_is_compact_branch(union mips_instruction insn);
  13
  14static inline int __insn_has_delay_slot(const union mips_instruction insn)
  15{
  16        switch (insn.i_format.opcode) {
  17        /*
  18         * jr and jalr are in r_format format.
  19         */
  20        case spec_op:
  21                switch (insn.r_format.func) {
  22                case jalr_op:
  23                case jr_op:
  24                        return 1;
  25                }
  26                break;
  27
  28        /*
  29         * This group contains:
  30         * bltz_op, bgez_op, bltzl_op, bgezl_op,
  31         * bltzal_op, bgezal_op, bltzall_op, bgezall_op.
  32         */
  33        case bcond_op:
  34                switch (insn.i_format.rt) {
  35                case bltz_op:
  36                case bltzl_op:
  37                case bgez_op:
  38                case bgezl_op:
  39                case bltzal_op:
  40                case bltzall_op:
  41                case bgezal_op:
  42                case bgezall_op:
  43                case bposge32_op:
  44                        return 1;
  45                }
  46                break;
  47
  48        /*
  49         * These are unconditional and in j_format.
  50         */
  51        case jal_op:
  52        case j_op:
  53        case beq_op:
  54        case beql_op:
  55        case bne_op:
  56        case bnel_op:
  57        case blez_op: /* not really i_format */
  58        case blezl_op:
  59        case bgtz_op:
  60        case bgtzl_op:
  61                return 1;
  62
  63        /*
  64         * And now the FPA/cp1 branch instructions.
  65         */
  66        case cop1_op:
  67#ifdef CONFIG_CPU_CAVIUM_OCTEON
  68        case lwc2_op: /* This is bbit0 on Octeon */
  69        case ldc2_op: /* This is bbit032 on Octeon */
  70        case swc2_op: /* This is bbit1 on Octeon */
  71        case sdc2_op: /* This is bbit132 on Octeon */
  72#endif
  73                return 1;
  74        }
  75
  76        return 0;
  77}
  78
  79#endif  /* __PROBES_COMMON_H */
  80