Subversion Repositories openrisc_2011-10-31

/* debug-unit.h -- Simulation of Or1k debug unit

   Copyright (C) 2001 Chris Ziomkowski, chris@asics.ws

   Copyright (C) 2008 Embecosm Limited

   Contributor Jeremy Bennett <jeremy.bennett@embecosm.com>

   This file is part of Or1ksim, the OpenRISC 1000 Architectural Simulator.

   This program is free software; you can redistribute it and/or modify it

   under the terms of the GNU General Public License as published by the Free

   Software Foundation; either version 3 of the License, or (at your option)

   any later version.

   This program is distributed in the hope that it will be useful, but WITHOUT

   ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or

   FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for

   more details.

   You should have received a copy of the GNU General Public License along

   with this program.  If not, see <http://www.gnu.org/licenses/>.  */

/* This program is commented throughout in a fashion suitable for processing

   with Doxygen. */

#ifndef DEBUG_UNIT__H

#define DEBUG_UNIT__H

/*! The possible debug unit actions */

enum debug_unit_action

{

  DebugInstructionFetch = 1,

  DebugLoadAddress      = 2,

  DebugStoreAddress     = 3,

  DebugLoadData         = 4,

  DebugStoreData        = 5

};

/*! Enumeration of the various JTAG scan chains. Only those actually

    implemented are specified. */

enum debug_scan_chain_ids

{

  JTAG_CHAIN_GLOBAL      = 0,

  JTAG_CHAIN_DEBUG_UNIT  = 1,

  JTAG_CHAIN_TRACE       = 3,

  JTAG_CHAIN_DEVELOPMENT = 4,

  JTAG_CHAIN_WISHBONE    = 5,

};

/* Function prototypes for external use */

extern void  du_reset ();

extern void  set_stall_state (int state);

extern int   check_debug_unit (enum debug_unit_action  action,

                               unsigned long           udata);

extern int   debug_get_register (oraddr_t  address,

                                 uorreg_t *data);

extern int   debug_set_register (oraddr_t  address,

                                 uorreg_t  data);

extern int   debug_set_chain (enum debug_scan_chain_ids  chain);

extern int   debug_ignore_exception (unsigned long except);

extern void  reg_debug_sec ();

#endif  /*  DEBUG_UNIT__H */