packages/hal/nios2/arch/current/include/nios2_opcode.h

   1 #ifndef CYGONCE_NIOS2_OPCODE_H
   2 #define CYGONCE_NIOS2_OPCODE_H
   3
   4 //=============================================================================
   5 //
   6 //      nios2_opcode.h
   7 //
   8 //      Opcodes for Nios II.
   9 //
  10 //=============================================================================
  11 //####ECOSGPLCOPYRIGHTBEGIN####
  12 // -------------------------------------------
  13 // This file is part of eCos, the Embedded Configurable Operating System.
  14 //
  15 // eCos is free software; you can redistribute it and/or modify it under
  16 // the terms of the GNU General Public License as published by the Free
  17 // Software Foundation; either version 2 or (at your option) any later version.
  18 //
  19 // eCos is distributed in the hope that it will be useful, but WITHOUT ANY
  20 // WARRANTY; without even the implied warranty of MERCHANTABILITY or
  21 // FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  22 // for more details.
  23 //
  24 // You should have received a copy of the GNU General Public License along
  25 // with eCos; if not, write to the Free Software Foundation, Inc.,
  26 // 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA.
  27 //
  28 // As a special exception, if other files instantiate templates or use macros
  29 // or inline functions from this file, or you compile this file and link it
  30 // with other works to produce a work based on this file, this file does not
  31 // by itself cause the resulting work to be covered by the GNU General Public
  32 // License. However the source code for this file must still be made available
  33 // in accordance with section (3) of the GNU General Public License.
  34 //
  35 // This exception does not invalidate any other reasons why a work based on
  36 // this file might be covered by the GNU General Public License.
  37 //
  38 // -------------------------------------------
  39 //####ECOSGPLCOPYRIGHTEND####
  40 //=============================================================================
  41
  42 // Provide structures and defines used for decoding Nios II instructions
  43
  44 // Define the instruction formats.
  45
  46 typedef union {
  47     unsigned word;
  48
  49     struct {
  50         unsigned op: 6;
  51         unsigned imm: 16;
  52         unsigned b: 5;
  53         unsigned a: 5;
  54     } IType;
  55
  56     struct {
  57         unsigned op: 6;
  58         unsigned blank: 5;
  59         unsigned opx: 6;
  60         unsigned c: 5;
  61         unsigned b: 5;
  62         unsigned a: 5;
  63     } RType;
  64
  65     struct {
  66         unsigned op: 6;
  67         unsigned imm: 26;
  68     } JType;
  69 } InstFmt;
  70
  71 //Values for the 'op' field.
  72
  73 #define OP_ADDI         0x04
  74 #define OP_ANDHI        0x2c
  75 #define OP_ANDI         0x0c
  76 #define OP_BEQ          0x26
  77 #define OP_BGE          0x0e
  78 #define OP_BGEU         0x2e
  79 #define OP_BLT          0x16
  80 #define OP_BLTU         0x36
  81 #define OP_BNE          0x1e
  82 #define OP_BR           0x06
  83 #define OP_CALL         0x00
  84 #define OP_CMPEQI       0x20
  85 #define OP_CMPGEI       0x08
  86 #define OP_CMPGEUI      0x28
  87 #define OP_CMPLTI       0x10
  88 #define OP_CMPLTUI      0x30
  89 #define OP_CMPNEI       0x18
  90 #define OP_FLUSHD       0x3b
  91 #define OP_LDB          0x07
  92 #define OP_LDBIO        0x27
  93 #define OP_LDBU         0x03
  94 #define OP_LDBUIO       0x23
  95 #define OP_LDH          0x0f
  96 #define OP_LDHIO        0x2f
  97 #define OP_LDHU         0x0b
  98 #define OP_LDHUIO       0x2b
  99 #define OP_LDW          0x17
 100 #define OP_LDWIO        0x37
 101 #define OP_MULI         0x24
 102 #define OP_ORHI         0x34
 103 #define OP_ORI          0x14
 104 #define OP_STB          0x05
 105 #define OP_STBIO        0x25
 106 #define OP_STH          0x0d
 107 #define OP_STHIO        0x2d
 108 #define OP_STW          0x15
 109 #define OP_STWIO        0x35
 110 #define OP_USR          0x32
 111 #define OP_XORHI        0x3c
 112 #define OP_XORI         0x1c
 113 #define OP_RTYPE        0x3a
 114
 115 // Values of the 'opx' field for when the opcode = OP_RTYPE
 116
 117 #define OPX_ERET        0x01
 118 #define OPX_ROLI        0x02
 119 #define OPX_ROL         0x03
 120 #define OPX_FLUSHP      0x04
 121 #define OPX_RET         0x05
 122 #define OPX_NOR         0x06
 123 #define OPX_MULXUU      0x07
 124 #define OPX_CMPGE       0x08
 125 #define OPX_BRET        0x09
 126 #define OPX_ROR         0x0b
 127 #define OPX_FLUSHI      0x0c
 128 #define OPX_JMP         0x0d
 129 #define OPX_AND         0x0e
 130 #define OPX_CMPLT       0x10
 131 #define OPX_SLLI        0x12
 132 #define OPX_SLL         0x13
 133 #define OPX_OR          0x16
 134 #define OPX_MULXSU      0x17
 135 #define OPX_CMPNE       0x18
 136 #define OPX_SRLI        0x1a
 137 #define OPX_SRL         0x1b
 138 #define OPX_NEXTPC      0x1c
 139 #define OPX_CALLR       0x1d
 140 #define OPX_XOR         0x1e
 141 #define OPX_MULXSS      0x1f
 142 #define OPX_CMPEQ       0x20
 143 #define OPX_DIVU        0x24
 144 #define OPX_DIV         0x25
 145 #define OPX_RDCTL       0x26
 146 #define OPX_MUL         0x27
 147 #define OPX_CMPGEU      0x28
 148 #define OPX_TRAP        0x2d
 149 #define OPX_WRCTL       0x2e
 150 #define OPX_CMPLTU      0x30
 151 #define OPX_ADD         0x31
 152 #define OPX_BREAK       0x34
 153 #define OPX_SYNC        0x36
 154 #define OPX_SUB         0x39
 155 #define OPX_SRAI        0x3a
 156 #define OPX_SRA         0x3b
 157
 158 // Instructions with specal significance to debuggers.
 159
 160 #define BREAK_INSTR     0x005b603a      // instruction code for break (actually trap)
 161 #define NOP_INSTR       0x0001883a      // instruction code for no-op
 162
 163 #endif  // CYGONCE_NIOS2_OPCODE_H