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/* abstract.c -- Abstract entities
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Copyright (C) 1999 Damjan Lampret, lampret@opencores.org
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This file is part of OpenRISC 1000 Architectural Simulator.
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software
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Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */
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/* Abstract memory and routines that goes with this. I need to
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add all sorts of other abstract entities. Currently we have
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only memory. */
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#include <stdio.h>
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#include <ctype.h>
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#include <string.h>
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#include "parse.h"
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#include "abstract.h"
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#include "arch.h"
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#include "trace.h"
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#include "execute.h"
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extern unsigned long reg[];
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/* This is an abstract memory array rather than physical memory array */
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struct mem_entry mem[MEMORY_LEN];
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void dumpmemory(unsigned int from, unsigned int to)
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{
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unsigned int i;
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for(i = from; i < to; i++)
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if (strlen(mem[i].insn)) {
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printf("\n%.4x: ", i);
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if (strlen(mem[i].label))
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printf("%s%s\n", mem[i].label, LABELEND_CHAR);
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printf("\t\t%s\t%s", mem[i].insn, mem[i].op1);
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if (strlen(mem[i].op2))
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printf("%s%s", OPERAND_DELIM, mem[i].op2);
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if (strlen(mem[i].op3))
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printf("%s%s", OPERAND_DELIM, mem[i].op3);
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if (strlen(mem[i].op4))
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printf("%s%s", OPERAND_DELIM, mem[i].op4);
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i += 3; /* insn long 4 bytes */
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} else
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{
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if (i % 8 == 0)
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printf("\n%.4x: ", i);
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/* don't print ascii chars below 0x20. */
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if (mem[i].data < 0x20)
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printf("0x%.2x ", (unsigned char)mem[i].data);
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else
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printf("0x%.2x'%c' ", (unsigned char)mem[i].data, mem[i].data);
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}
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}
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/* Searches mem array for a particular label and returns label's address.
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If label does not exist, returns 0. */
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unsigned long eval_label(char *label)
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{
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int i;
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for(i = 0; i < MEMORY_LEN; i++)
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if (strcmp(label, mem[i].label) == 0)
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return i;
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printf("\nINTERNAL ERROR: undefined label %s\n", label);
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cont_run = 0;
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return 0;
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}
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/* Returns 32-bit values from mem array. Big endian version. */
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unsigned long eval_mem32(unsigned long memaddr)
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{
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unsigned long temp;
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if (memaddr < MEMORY_LEN) {
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/* temp = ((unsigned long)(mem[memaddr].data << 24) & 0xff000000);
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temp += ((unsigned long)(mem[memaddr + 1].data << 16) & 0x00ff0000);
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temp += ((unsigned long)(mem[memaddr + 2].data << 8) & 0x0000ff00);
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temp += ((unsigned long)mem[memaddr + 3].data & 0x000000ff); */
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temp = mem[memaddr].data << 24;
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temp += mem[memaddr + 1].data << 16;
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temp += mem[memaddr + 2].data << 8;
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temp += mem[memaddr + 3].data;
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} else {
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printf("EXCEPTION: read out of memory (32-bit access to %.8lx)\n", memaddr);
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cont_run = 0;
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temp = ((unsigned long)(mem[0].data << 24) & 0xff000000);
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temp += ((unsigned long)(mem[1].data << 16) & 0x00ff0000);
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temp += ((unsigned long)(mem[2].data << 8) & 0x0000ff00);
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temp += ((unsigned long)mem[3].data & 0x000000ff);
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}
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return temp;
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}
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/* Returns 16-bit values from mem array. Big endian version. */
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unsigned short eval_mem16(unsigned long memaddr)
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{
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unsigned short temp;
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if (memaddr < MEMORY_LEN) {
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temp = ((unsigned short)(mem[memaddr].data << 8) & 0xff00);
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temp += ((unsigned short)mem[memaddr + 1].data & 0x00ff);
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} else {
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printf("EXCEPTION: read out of memory (16-bit access to %.8lx)\n", memaddr);
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cont_run = 0;
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temp = ((unsigned short)(mem[0].data << 8) & 0xff00);
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temp += ((unsigned short)mem[1].data & 0x00ff);
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}
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return temp;
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}
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/* Returns 8-bit values from mem array. Big endian version. */
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unsigned char eval_mem8(unsigned long memaddr)
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{
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if (memaddr < MEMORY_LEN) {
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return (unsigned char)mem[memaddr].data;
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} else {
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printf("EXCEPTION: read out of memory (16-bit access to %.8lx)\n", memaddr);
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cont_run = 0;
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return (unsigned char)mem[0].data;
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}
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}
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/* Set mem, 32-bit. Big endian version. */
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void set_mem32(unsigned long memaddr, unsigned long value)
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{
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if (memaddr < MEMORY_LEN) {
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mem[memaddr].data = (value >> 24);
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mem[memaddr + 1].data = (char)(value >> 16);
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mem[memaddr + 2].data = (char)(value >> 8);
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mem[memaddr + 3].data = (char)(value);
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} else {
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printf("EXCEPTION: write out of memory (32-bit access to %.8lx)\n", memaddr);
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cont_run = 0;
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}
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return;
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}
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/* Set mem, 16-bit. Big endian version. */
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void set_mem16(unsigned long memaddr, unsigned short value)
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{
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if (memaddr < MEMORY_LEN) {
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mem[memaddr].data = (value >> 8);
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mem[memaddr + 1].data = (char)(value);
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} else {
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printf("EXCEPTION: write out of memory (16-bit access to %.8lx)\n", memaddr);
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cont_run = 0;
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}
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return;
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}
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/* Set mem, 8-bit. Big endian version. */
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void set_mem8(unsigned long memaddr, unsigned char value)
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{
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if (memaddr < MEMORY_LEN) {
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mem[memaddr].data = value;
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} else {
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printf("EXCEPTION: write out of memory (8-bit access to %.8lx)\n", memaddr);
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cont_run = 0;
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}
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return;
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}
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