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/* except.h -- OR1K architecture specific exceptions

   Copyright (C) 1999 Damjan Lampret, lampret@opencores.org

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. */

#ifndef _EXCEPT_H_

#define _EXCEPT_H_

/* Define if you want pure virtual machine simulation (no exceptions etc.) */

#define ONLY_VIRTUAL_MACHINE 0

/* Definition of OR1K exceptions */

#define EXCEPT_RESET    0x0100

#define EXCEPT_BUSERR   0x0200

#define EXCEPT_DPF      0x0300

#define EXCEPT_IPF      0x0400

#define EXCEPT_TICK     0x0500

#define EXCEPT_ALIGN    0x0600

#define EXCEPT_ILLEGAL  0x0700

#define EXCEPT_INT      0x0800

#define EXCEPT_DTLBMISS 0x0900

#define EXCEPT_ITLBMISS 0x0a00

#define EXCEPT_RANGE    0x0b00

#define EXCEPT_SYSCALL  0x0c00

#define EXCEPT_TRAP     0x0e00

/* Non maskable exceptions */

#define IS_NME(E) ((E) == EXCEPT_RESET)

#define EXCEPT_NAME(E) E == EXCEPT_RESET ? "Reset" : \

                        E == EXCEPT_BUSERR ? "Bus Error" : \

                        E == EXCEPT_DPF ? "Data Page Fault" : \

                        E == EXCEPT_IPF ? "Insn Page Fault" : \

                        E == EXCEPT_TICK ? "Tick timer" : \

                        E == EXCEPT_ALIGN ? "Alignment" : \

                        E == EXCEPT_ILLEGAL ? "Illegal instruction" : \

                        E == EXCEPT_INT ? "Interrupt" : \

                        E == EXCEPT_DTLBMISS ? "Data TLB Miss" : \

                        E == EXCEPT_ITLBMISS ? "Insn TLB Miss" : \

                        E == EXCEPT_RANGE ? "Range" : \

                        E == EXCEPT_SYSCALL ? "System Call" : \

                        E == EXCEPT_TRAP ? "Trap" : "Unknown"

extern struct _pending {

  int valid;

  int type;

  unsigned long address;

  unsigned long saved;

} pending;

/* Prototypes */

void except_handle(int except, unsigned long ea);

/* Actually handles exception */

void except_handle_backend (int except, unsigned long ea, unsigned long pc_saved);

/* Discards all pending exceptions */

void clear_pending_exception();

#endif