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

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

This file is part of 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 2 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, write to the Free Software

Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */

typedef enum {

  JTAG_CHAIN_GLOBAL = 0,

  JTAG_CHAIN_DEBUG_UNIT = 1,

  JTAG_CHAIN_TEST = 2,

  JTAG_CHAIN_TRACE = 3,

  JTAG_CHAIN_DEVELOPMENT = 4,

  JTAG_CHAIN_WISHBONE = 5,

  JTAG_CHAIN_BLOCK1 = 6,

  JTAG_CHAIN_BLOCK2 = 7,

  JTAG_CHAIN_OPTIONAL0 = 8,

  JTAG_CHAIN_OPTIONAL1 = 9,

  JTAG_CHAIN_OPTIONAL2 = 10,

  JTAG_CHAIN_OPTIONAL3 = 11,

  JTAG_CHAIN_OPTIONAL4 = 12,

  JTAG_CHAIN_OPTIONAL5 = 13,

  JTAG_CHAIN_OPTIONAL6 = 14,

  JTAG_CHAIN_OPTIONAL7 = 15,

} DebugScanChainIDs;

typedef struct {

  unsigned int DCR_hit;

  unsigned int watchpoint;

} DebugUnit;

typedef enum {

  DebugInstructionFetch = 1,

  DebugLoadAddress = 2,

  DebugStoreAddress = 3,

  DebugLoadData = 4,

  DebugStoreData = 5,

} DebugUnitAction;

/* Debug registers and their bits */

typedef struct {

  unsigned long moder;

  unsigned long tsel;

  unsigned long qsel;

  unsigned long ssel;

  unsigned long riscop;

  unsigned long recwp[11];

  unsigned long recbp;

} DevelopmentInterface;

typedef enum {

  DEVELOPINT_MODER = 0,

  DEVELOPINT_TSEL = 1,

  DEVELOPINT_QSEL = 2,

  DEVELOPINT_SSEL = 3,

  DEVELOPINT_RISCOP = 4,

  DEVELOPINT_RECWP0 = 16,

  DEVELOPINT_RECWP1 = 17,

  DEVELOPINT_RECWP2 = 18,

  DEVELOPINT_RECWP3 = 19,

  DEVELOPINT_RECWP4 = 20,

  DEVELOPINT_RECWP5 = 21,

  DEVELOPINT_RECWP6 = 22,

  DEVELOPINT_RECWP7 = 23,

  DEVELOPINT_RECWP8 = 24,

  DEVELOPINT_RECWP9 = 25,

  DEVELOPINT_RECWP10 = 26,

  DEVELOPINT_RECBP0 = 27,

} DevelopmentInterfaceAddressSpace;

#define RISCOP_STALL  0x00000001

#define RISCOP_RESET  0x00000002

/* Resets the debug unit */

void du_reset(void);

/* do cycle-related initialisation (watchpoints etc.) */

void du_clock();

/* set cpu_stalled flag */

void set_stall_state (int state);

/* Whether debug unit should ignore exception */

int debug_ignore_exception (unsigned long except);

/* Gets development interface register */

int get_devint_reg(unsigned int addr, unsigned long *data);

/* Sets development interface register */

int set_devint_reg(unsigned int addr, unsigned long data);

/* Reads from bus address */

int debug_get_mem(unsigned int address, unsigned long *data);

/* Writes to bus address */

int debug_set_mem(unsigned int address, unsigned long data);

int DebugGetRegister(unsigned int address, unsigned long *data);

int DebugSetRegister(unsigned int address, unsigned long data);

int DebugSetChain(int chain);

#ifdef DEBUGMOD_OFF

#define CheckDebugUnit(x,y) 0

#else

int CheckDebugUnit(DebugUnitAction, unsigned long);

#endif