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[/] [openrisc/] [trunk/] [or1ksim/] [debug/] [jtag.h] - Blame information for rev 584

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1 82 jeremybenn
/* jtag.c -- JTAG modeling
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   Copyright (C) 2010 Embecosm Limited
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   Contributor Jeremy Bennett <jeremy.bennett@embecosm.com>
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   This file is part of Or1ksim, the OpenRISC 1000 Architectural Simulator.
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   This program is free software; you can redistribute it and/or modify it
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   under the terms of the GNU General Public License as published by the Free
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   Software Foundation; either version 3 of the License, or (at your option)
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   any later version.
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   This program is distributed in the hope that it will be useful, but WITHOUT
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   ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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   FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
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   more details.
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   You should have received a copy of the GNU General Public License along
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   with this program.  If not, see <http://www.gnu.org/licenses/>.  */
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/* This program is commented throughout in a fashion suitable for processing
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   with Doxygen. */
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#ifndef JTAG__H
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#define JTAG__H
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/*! Enumeration of the JTAG instruction types */
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enum  jtag_instr {
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  JI_UNDEFINED      =  -1,              /* Won't fit in bitfield */
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  JI_EXTEST         = 0x0,
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  JI_SAMPLE_PRELOAD = 0x1,
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  JI_IDCODE         = 0x2,
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  JI_DEBUG          = 0x8,
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  JI_MBIST          = 0x9,
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  JI_BYPASS         = 0xf
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};
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/*! Enumeration of the JTAG module IDs */
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enum  jtag_mod_id {
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  JM_UNDEFINED =  -1,                   /* Won't fit in bitfield */
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  JM_WISHBONE  = 0x0,
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  JM_CPU0      = 0x1,
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  JM_CPU1      = 0x2
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};
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/*! Enumeration of the DEBUG command types */
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enum  jtag_cmd {
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  JCMD_UNDEFINED     = -1,              /* Won't fit in bitfield */
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  JCMD_GO_COMMAND    = 0x0,
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  JCMD_READ_COMMAND  = 0x1,
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  JCMD_WRITE_COMMAND = 0x2,
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  JCMD_READ_CONTROL  = 0x3,
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  JCMD_WRITE_CONTROL = 0x4
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};
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/*! Enumeration of the access types for WRITE_COMMAND */
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enum  jtag_acc_type {
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  JAT_UNDEFINED  = -1,                  /* Won't fit in bitfield */
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  JAT_WRITE8     = 0,                    /* WishBone only */
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  JAT_WRITE16    = 1,                   /* WishBone only */
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  JAT_WRITE32    = 2,
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  JAT_READ8      = 4,                   /* WishBone only */
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  JAT_READ16     = 5,                   /* WishBone only */
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  JAT_READ32     = 6
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};
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/*! Enumeration of the status field bits */
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enum jtag_status {
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  JS_OK             = 0x0,              /*!< No error */
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  JS_CRC_IN_ERROR   = 0x1,              /*!< Supplied CRC error */
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  JS_MODULE_MISSING = 0x2,              /*!< Non-existent module select */
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  JS_WISHBONE_ERROR = 0x4,              /*!< Problem accessing Wishgone */
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  JS_OVER_UNDERRUN  = 0x8               /*!< Over/under-run of data */
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};
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/*! Enumeration of the control bits */
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enum jtag_control_bits {
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  JCB_RESET = 51,                       /*!< Reset the processor */
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  JCB_STALL = 50,                       /*!< Stall the processor */
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};
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/* Function prototypes for external use */
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extern void  jtag_init ();
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extern void  jtag_reset ();
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extern void  jtag_shift_ir (unsigned char *jreg,
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                            int            num_bits);
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extern void  jtag_shift_dr (unsigned char *jreg,
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                            int            num_bits);
91 82 jeremybenn
 
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#endif  /* JTAG__H */

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