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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