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/* abstract.c -- Abstract entities header file
   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. */
 
#define DEFAULT_MEMORY_START	0
#define DEFAULT_MEMORY_LEN	0x800000
#define STACK_SIZE	20
#define LABELNAME_LEN	50
#define INSNAME_LEN	15
#define OPERANDNAME_LEN 50
 
#define MAX_OPERANDS    (4)
 
/* Structure for holding several labels of a particular memory location */
struct label_entry {
  char *name;
  struct label_entry *next;
};
 
#define OP_MEM_ACCESS 0x80000000
 
/* This is an abstract memory type rather than physical memory type.  It holds
disassembled instructions.  */
struct mem_entry {
  unsigned char data;
  unsigned char brk;
  struct label_entry *label; /* labels */
};
 
enum insn_type { unknown, exception, arith, shift, compare, branch,
		 jump, load, store, movimm, move, extend, nop, mac };
 
/* Instruction queue */
struct iqueue_entry {
  enum insn_type func_unit;
  int insn_index;  
  unsigned long insn;
  unsigned long op[2 * MAX_OPERANDS];
  unsigned long insn_addr;
};
 
/* Memory regions assigned to devices */
struct dev_memarea {
  struct dev_memarea *next;  
  unsigned long start;
  unsigned long end;
  unsigned long size;
  unsigned char (*readfunc)(unsigned long);
  void (*writefunc)(unsigned long, unsigned char);
  struct mem_entry* (*getentry) (unsigned long);
  /* private data */
  unsigned long misc;
};
 
extern struct iqueue_entry iqueue[20];
extern struct iqueue_entry icomplet[20];
extern unsigned long pc;
 
extern void dumpmemory(unsigned int from, unsigned int to, int disasm);
extern unsigned long eval_label(char *label);
extern unsigned long eval_mem32(unsigned long memaddr,int*);
extern unsigned short eval_mem16(unsigned long memaddr,int*);
extern unsigned char eval_mem8(unsigned long memaddr,int*);
extern void set_mem32(unsigned long memaddr, unsigned long value,int*);
extern void set_mem16(unsigned long memaddr, unsigned short value,int*);
extern void set_mem8(unsigned long memaddr, unsigned char value,int*);
 
unsigned long evalsim_mem32(unsigned long);
unsigned short evalsim_mem16(unsigned long);
unsigned char evalsim_mem8(unsigned long);
void setsim_mem32(unsigned long,unsigned long);
void setsim_mem16(unsigned long,unsigned short);
void setsim_mem8(unsigned long,unsigned char);
 
void sim_read_memory_table (char *filename);
 
/* Register read and write function for a memory area (used by peripheral
   devices like 16450 UART etc.) */
void register_memoryarea(unsigned long start, unsigned long size, unsigned char (readfunc)(unsigned long),
                         void (writefunc)(unsigned long, unsigned char), struct mem_entry *(getentry)(unsigned long));
/* Check if access is to registered area of memory. */
struct dev_memarea *verify_memoryarea(unsigned long addr);
/* Temporary variable to increase speed.  */
extern struct dev_memarea *cur_area;
 
#ifndef DEBUGMOD_OFF
extern int GlobalMode; /* Added by CZ 26/05/01 */
#else /* DEBUGMOD_OFF */
#define GlobalMode 0
#endif /* DEBUGMOD_OFF */
 
/* Added by MM */
#ifndef LONGEST
#define LONGEST long long
#define ULONGEST unsigned long long
#endif /* ! LONGEST */