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annotate packages/hal/openrisc/arch/current/include/openrisc_opcode.h @ 3292:7f8e529b4d82 default tip

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Fix FREESCALE_EDMA_NBYTES_MLOFFYES_MLOFF() so it works with negative offsets.
author vae
date Wed, 29 Apr 2015 23:31:48 +0000
parents 74dbf4c3f2e1
children
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1 //=============================================================================
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2 //
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3 // openrisc_opcode.h
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4 //
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5 // Define the instruction formats and opcode values for the OpenRISC
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6 // instruction set...or at least just enough of them to implement
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7 // single-stepping.
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8 //
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9 //=============================================================================
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10 // ####ECOSGPLCOPYRIGHTBEGIN####
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11 // -------------------------------------------
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12 // This file is part of eCos, the Embedded Configurable Operating System.
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13 // Copyright (C) 1998, 1999, 2000, 2001, 2002 Free Software Foundation, Inc.
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14 //
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15 // eCos is free software; you can redistribute it and/or modify it under
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16 // the terms of the GNU General Public License as published by the Free
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17 // Software Foundation; either version 2 or (at your option) any later
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18 // version.
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19 //
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20 // eCos is distributed in the hope that it will be useful, but WITHOUT
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21 // ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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22 // FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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23 // for more details.
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24 //
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25 // You should have received a copy of the GNU General Public License
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26 // along with eCos; if not, write to the Free Software Foundation, Inc.,
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27 // 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
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28 //
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29 // As a special exception, if other files instantiate templates or use
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30 // macros or inline functions from this file, or you compile this file
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31 // and link it with other works to produce a work based on this file,
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32 // this file does not by itself cause the resulting work to be covered by
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33 // the GNU General Public License. However the source code for this file
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34 // must still be made available in accordance with section (3) of the GNU
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35 // General Public License v2.
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36 //
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37 // This exception does not invalidate any other reasons why a work based
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38 // on this file might be covered by the GNU General Public License.
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39 // -------------------------------------------
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40 // ####ECOSGPLCOPYRIGHTEND####
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41 //=============================================================================
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42 //#####DESCRIPTIONBEGIN####
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43 //
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44 // Author(s): sfurman
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45 // Contributors:
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46 // Date: 2003-02-28
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47 // Purpose: Allow dissection of OpenRISC instructions
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48 // Description: The types and macros defined here define the instruction
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49 // formats of the OpenRISC instruction set...or at least the
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50 // very limited subset necessary to allow single-stepping.
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51 //
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52 //####DESCRIPTIONEND####
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53 //
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54 //=============================================================================
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55
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56 #ifndef _OPENRISC_OPCODE_H
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57 #define _OPENRISC_OPCODE_H
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58
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59
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60 // Define the instruction formats.
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61 typedef union {
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62 unsigned word;
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63
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64 // (Possibly conditional) relative jump w/ immediate displacement
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65 struct {
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66 unsigned op: 6; // OP_J, OP_JAL, OP_BNF, or OP_BF
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67 signed target: 26;
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68 } JType;
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69
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70 // Absolute jump w/ register contents used as PC target address
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71 struct {
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72 unsigned op: 6; // OP_JR or OP_JALR
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73 unsigned unused1:10;
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74 unsigned rB: 5; // Register containing new PC
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75 unsigned unused2:11;
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76 } JRType;
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77
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78 } InstFmt;
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79
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80 /*
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81 * Values for the 'op' field.
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82 */
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83 #define OP_J 0x00
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84 #define OP_JAL 0x01
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85 #define OP_BNF 0x03
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86 #define OP_BF 0x04
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87 #define OP_RFE 0x09
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88 #define OP_JR 0x11
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89 #define OP_JALR 0x12
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90
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91 #endif /* _OPENRISC_OPCODE_H */
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92
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93 // EOF openrisc_opcode.h