1 | /** |
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2 | * @file |
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3 | * @ingroup |
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4 | * @brief Instruction formats and opcode values for MIPS |
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5 | */ |
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6 | |
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7 | /* |
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8 | * Copyright (c) 1992 The Regents of the University of California. |
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9 | * All rights reserved. |
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10 | * |
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11 | * This code is derived from software contributed to Berkeley by |
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12 | * Ralph Campbell. |
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13 | * |
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14 | * Redistribution and use in source and binary forms, with or without |
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15 | * modification, are permitted provided that the following conditions |
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16 | * are met: |
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17 | * 1. Redistributions of source code must retain the above copyright |
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18 | * notice, this list of conditions and the following disclaimer. |
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19 | * 2. Redistributions in binary form must reproduce the above copyright |
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20 | * notice, this list of conditions and the following disclaimer in the |
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21 | * documentation and/or other materials provided with the distribution. |
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22 | * 3. All advertising materials mentioning features or use of this software |
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23 | * must display the following acknowledgement: |
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24 | * This product includes software developed by the University of |
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25 | * California, Berkeley and its contributors. |
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26 | * 4. Neither the name of the University nor the names of its contributors |
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27 | * may be used to endorse or promote products derived from this software |
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28 | * without specific prior written permission. |
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29 | * |
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30 | * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND |
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31 | * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
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32 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
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33 | * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE |
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34 | * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL |
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35 | * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS |
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36 | * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) |
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37 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT |
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38 | * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY |
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39 | * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF |
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40 | * SUCH DAMAGE. |
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41 | * |
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42 | * from: @(#)mips_opcode.h 7.1 (Berkeley) 3/19/92 |
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43 | * via: mips_opcode.h,v 1.1 1994/03/10 16:15:10 (algorithmics) |
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44 | */ |
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45 | |
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46 | /* |
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47 | * Define the instruction formats and opcode values for the |
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48 | * MIPS instruction set. |
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49 | */ |
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50 | |
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51 | #ifndef _MIPS_OPCODE_H |
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52 | #define _MIPS_OPCODE_H |
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53 | |
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54 | /** |
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55 | * @defgroup mips_ops MIPS Opcodes |
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56 | * @ingroup RTEMSBSPsMIPSShared |
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57 | * @brief MIPS Instruction Formats and Opcode Values |
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58 | * @{ |
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59 | */ |
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60 | |
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61 | /** |
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62 | * @name Instruction formats |
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63 | * @{ |
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64 | */ |
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65 | |
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66 | typedef union { |
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67 | unsigned word; |
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68 | |
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69 | #ifdef MIPSEL |
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70 | struct { |
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71 | unsigned imm: 16; |
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72 | unsigned rt: 5; |
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73 | unsigned rs: 5; |
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74 | unsigned op: 6; |
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75 | } IType; |
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76 | |
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77 | struct { |
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78 | unsigned target: 26; |
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79 | unsigned op: 6; |
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80 | } JType; |
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81 | |
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82 | struct { |
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83 | unsigned func: 6; |
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84 | unsigned shamt: 5; |
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85 | unsigned rd: 5; |
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86 | unsigned rt: 5; |
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87 | unsigned rs: 5; |
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88 | unsigned op: 6; |
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89 | } RType; |
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90 | |
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91 | struct { |
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92 | unsigned func: 6; |
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93 | unsigned fd: 5; |
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94 | unsigned fs: 5; |
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95 | unsigned ft: 5; |
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96 | unsigned fmt: 4; |
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97 | unsigned : 1; /* always '1' */ |
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98 | unsigned op: 6; /* always '0x11' */ |
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99 | } FRType; |
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100 | #else |
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101 | struct { |
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102 | unsigned op: 6; |
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103 | unsigned rs: 5; |
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104 | unsigned rt: 5; |
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105 | unsigned imm: 16; |
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106 | } IType; |
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107 | |
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108 | struct { |
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109 | unsigned op: 6; |
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110 | unsigned target: 26; |
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111 | } JType; |
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112 | |
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113 | struct { |
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114 | unsigned op: 6; |
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115 | unsigned rs: 5; |
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116 | unsigned rt: 5; |
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117 | unsigned rd: 5; |
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118 | unsigned shamt: 5; |
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119 | unsigned func: 6; |
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120 | } RType; |
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121 | |
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122 | struct { |
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123 | unsigned op: 6; /* always '0x11' */ |
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124 | unsigned : 1; /* always '1' */ |
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125 | unsigned fmt: 4; |
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126 | unsigned func: 6; |
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127 | unsigned ft: 5; |
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128 | unsigned fs: 5; |
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129 | unsigned fd: 5; |
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130 | } FRType; |
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131 | #endif |
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132 | } InstFmt; |
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133 | |
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134 | /** @} */ |
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135 | |
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136 | /** |
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137 | * @name 'op' field values |
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138 | * @{ |
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139 | */ |
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140 | |
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141 | #define OP_SPECIAL 000 |
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142 | #define OP_REGIMM 001 |
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143 | #define OP_J 002 |
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144 | #define OP_JAL 003 |
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145 | #define OP_BEQ 004 |
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146 | #define OP_BNE 005 |
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147 | #define OP_BLEZ 006 |
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148 | #define OP_BGTZ 007 |
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149 | |
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150 | #define OP_ADDI 010 |
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151 | #define OP_ADDIU 011 |
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152 | #define OP_SLTI 012 |
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153 | #define OP_SLTIU 013 |
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154 | #define OP_ANDI 014 |
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155 | #define OP_ORI 015 |
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156 | #define OP_XORI 016 |
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157 | #define OP_LUI 017 |
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158 | |
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159 | #define OP_COP0 020 |
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160 | #define OP_COP1 021 |
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161 | #define OP_COP2 022 |
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162 | #define OP_BEQL 024 |
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163 | #define OP_BNEL 025 |
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164 | #define OP_BLEZL 026 |
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165 | #define OP_BGTZL 027 |
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166 | |
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167 | #define OP_DADDI 030 |
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168 | #define OP_DADDIU 031 |
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169 | #define OP_LDL 032 |
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170 | #define OP_LDR 033 |
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171 | |
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172 | #define OP_LB 040 |
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173 | #define OP_LH 041 |
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174 | #define OP_LWL 042 |
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175 | #define OP_LW 043 |
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176 | #define OP_LBU 044 |
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177 | #define OP_LHU 045 |
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178 | #define OP_LWR 046 |
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179 | #define OP_LWU 047 |
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180 | |
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181 | #define OP_SB 050 |
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182 | #define OP_SH 051 |
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183 | #define OP_SWL 052 |
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184 | #define OP_SW 053 |
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185 | #define OP_SDL 054 |
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186 | #define OP_SDR 055 |
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187 | #define OP_SWR 056 |
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188 | #define OP_CACHE 057 |
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189 | |
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190 | #define OP_LL 060 |
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191 | #define OP_LWC1 061 |
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192 | #define OP_LWC2 062 |
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193 | #define OP_LLD 064 |
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194 | #define OP_LDC1 065 |
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195 | #define OP_LDC2 066 |
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196 | #define OP_LD 067 |
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197 | |
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198 | #define OP_SC 070 |
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199 | #define OP_SWC1 071 |
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200 | #define OP_SWC2 072 |
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201 | #define OP_SCD 074 |
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202 | #define OP_SDC1 075 |
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203 | #define OP_SDC2 076 |
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204 | #define OP_SD 077 |
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205 | |
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206 | /** |
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207 | * @name 'func' field values when 'op' == OP_SPECIAL. |
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208 | * @{ |
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209 | */ |
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210 | |
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211 | #define OP_SLL 000 |
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212 | #define OP_SRL 002 |
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213 | #define OP_SRA 003 |
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214 | #define OP_SLLV 004 |
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215 | #define OP_SRLV 006 |
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216 | #define OP_SRAV 007 |
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217 | |
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218 | #define OP_JR 010 |
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219 | #define OP_JALR 011 |
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220 | #define OP_SYSCALL 014 |
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221 | #define OP_BREAK 015 |
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222 | #define OP_SYNC 017 |
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223 | |
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224 | #define OP_MFHI 020 |
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225 | #define OP_MTHI 021 |
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226 | #define OP_MFLO 022 |
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227 | #define OP_MTLO 023 |
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228 | #define OP_DSLLV 024 |
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229 | #define OP_DSRLV 026 |
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230 | #define OP_DSRAV 027 |
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231 | |
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232 | #define OP_MULT 030 |
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233 | #define OP_MULTU 031 |
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234 | #define OP_DIV 032 |
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235 | #define OP_DIVU 033 |
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236 | #define OP_DMULT 034 |
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237 | #define OP_DMULTU 035 |
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238 | #define OP_DDIV 036 |
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239 | #define OP_DDIVU 037 |
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240 | |
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241 | #define OP_ADD 040 |
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242 | #define OP_ADDU 041 |
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243 | #define OP_SUB 042 |
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244 | #define OP_SUBU 043 |
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245 | #define OP_AND 044 |
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246 | #define OP_OR 045 |
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247 | #define OP_XOR 046 |
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248 | #define OP_NOR 047 |
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249 | |
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250 | #define OP_SLT 052 |
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251 | #define OP_SLTU 053 |
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252 | #define OP_DADD 054 |
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253 | #define OP_DADDU 055 |
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254 | #define OP_DSUB 056 |
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255 | #define OP_DSUBU 057 |
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256 | |
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257 | #define OP_TGE 060 |
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258 | #define OP_TGEU 061 |
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259 | #define OP_TLT 062 |
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260 | #define OP_TLTU 063 |
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261 | #define OP_TEQ 064 |
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262 | #define OP_TNE 066 |
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263 | |
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264 | #define OP_DSLL 070 |
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265 | #define OP_DSRL 072 |
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266 | #define OP_DSRA 073 |
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267 | #define OP_DSLL32 074 |
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268 | #define OP_DSRL32 076 |
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269 | #define OP_DSRA32 077 |
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270 | |
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271 | /** @} */ |
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272 | |
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273 | /** |
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274 | * 'func' field values when 'op' == OP_REGIMM. |
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275 | * @{ |
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276 | */ |
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277 | |
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278 | #define OP_BLTZ 000 |
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279 | #define OP_BGEZ 001 |
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280 | #define OP_BLTZL 002 |
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281 | #define OP_BGEZL 003 |
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282 | |
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283 | #define OP_TGEI 010 |
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284 | #define OP_TGEIU 011 |
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285 | #define OP_TLTI 012 |
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286 | #define OP_TLTIU 013 |
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287 | #define OP_TEQI 014 |
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288 | #define OP_TNEI 016 |
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289 | |
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290 | #define OP_BLTZAL 020 |
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291 | #define OP_BGEZAL 021 |
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292 | #define OP_BLTZALL 022 |
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293 | #define OP_BGEZALL 023 |
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294 | |
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295 | /** @} */ |
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296 | |
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297 | /** |
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298 | * @name 'rs' field values when 'op' == OP_COPz. |
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299 | * @{ |
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300 | */ |
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301 | |
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302 | #define OP_MF 000 |
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303 | #define OP_DMF 001 |
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304 | #define OP_CF 002 |
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305 | #define OP_MT 004 |
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306 | #define OP_DMT 005 |
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307 | #define OP_CT 006 |
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308 | #define OP_BC 010 |
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309 | |
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310 | /** @} */ |
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311 | |
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312 | /** |
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313 | * @name 'rt' field values when 'op' == OP_COPz and 'rt' == OP_BC. |
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314 | * @{ |
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315 | */ |
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316 | |
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317 | #define COPz_BCF 0x00 |
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318 | #define COPz_BCT 0x01 |
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319 | #define COPz_BCFL 0x02 |
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320 | #define COPz_BCTL 0x03 |
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321 | |
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322 | /** @} */ |
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323 | |
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324 | /** |
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325 | * @name Instructions with specal significance to debuggers. |
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326 | * @{ |
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327 | */ |
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328 | |
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329 | #define BREAK_INSTR 0x0000000d ///< @brief instruction code for break |
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330 | #define NOP_INSTR 0x00000000 ///< @brief instruction code for no-op |
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331 | |
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332 | /** @} */ |
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333 | |
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334 | /** @} */ |
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335 | |
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336 | #endif /* _MIPS_OPCODE_H */ |
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