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/* toplevel.c -- Top level simulator source 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. */
 
/* Simulator commands. Help and version output. SIGINT processing.
Stdout redirection is specific to linux (I need to fix this). */
 
#include "config.h"
 
#include <stdio.h>
#include <ctype.h>
#include <string.h>
#include <stdlib.h>
#include <unistd.h>
#include <signal.h>
#include <stdarg.h>
 
#ifdef HAVE_LIBREADLINE
#include <readline/readline.h>
#include <readline/history.h>
#endif /* HAVE_LIBREADLINE */
 
#include "arch.h"
#include "parse.h"
#include "abstract.h"
#include "trace.h"
#include "execute.h"
 
#include "coff.h"
 
/* CVS revision number. */
const char rcsrev[] = "$Revision: 1.10 $";
 
/* Continuos run versus single step tracing switch. */
int cont_run;
 
/* History of execution */
int histexec[HISTEXEC_LEN];
 
char *sim_commands [] = {
  "q",
  "t",
  "help",
  "de",
  "dm",
  "run",
  "pr",
  "pm",
  "pc",
  "reset",
  "break",
  "hist",
  "stats",
  "info",
  "r",
  "dv",
  0
};
 
void debug(const char *format, ...)
{
#if DEBUG
  char *p;
  va_list ap;
 
  if ((p = malloc(1000)) == NULL)
    return;
  va_start(ap, format);
  (void) vsnprintf(p, 1000, format, ap);
  va_end(ap);
  printf("%s\n", p);
  fflush(stdout);
  free(p);
#endif
  return;
}
 
/* Strip whitespace from the start and end of STRING.  Return a pointer
   into STRING. */
#ifndef whitespace
#define	whitespace(a)	((a) == '\t' ? 1 : ((a) == ' '? 1 : 0))
#endif
 
char *
stripwhite (string)
     char *string;
{
  register char *s, *t;
 
  for (s = string; whitespace (*s); s++)
    ;
 
  if (*s == 0)
    return (s);
 
  t = s + strlen (s) - 1;
  while (t > s && whitespace (*t))
    t--;
  *++t = '\0';
 
  return s;
}
 
void 
ctrl_c(signum)
     int signum;
{
	cont_run = 1;
  signal(SIGINT, ctrl_c);
}
 
void 
version()
{
	printf ("\n");
	printf ("OpenRISC 1000 (OR16+OR32) Architectural Simulator, %s\n", rcsrev);
	printf ("Copyright (C) 1999 Damjan Lampret, lampret@opencores.org\n");
	printf ("Copyright (C) 2000 Damjan Lampret, lampret@opencores.org\n");
	printf ("                   Jimmy Chen-Min Chen, jimmy@ee.nctu.edu.tw\n");
	printf ("                   Johan Rydberg, johan.rydberg@insight.se\n");
	printf ("Visit http://www.opencores.org for more information about ");
	printf ("OpenRISC 1000 and\nother open source cores.\n\n");
	printf ("This software comes with ABSOLUTELY NO WARRANTY; for ");
	printf ("details see COPYING.\nThis is free software, and you ");
	printf ("are welcome to redistribute it under certain\nconditions; ");
	printf ("for details see COPYING.\n");
}
 
void 
help()
{
	printf("q			 - quit simulator\n");
	printf("r			 - display all registers\n");
	printf("t			 - execute next instruction\n");
	printf("run <cycles> [<hush>]	 - execute <cycles> instructions, no reg dump if hush\n");
	printf("pr <r> <value>		 - patch register <r> with <value>\n");
	printf("dm <fromaddr> [<toaddr>] - display memory from <fromaddr> to <toaddr>\n");
	printf("de                       - debug insn memory\n");
	printf("pm <addr> <value>	 - patch memory location <addr> with <value>\n");
	printf("pc <value>		 - patch PC register with <value>\n");
	printf("break <addr>		 - toggle breakpoint at address <addr>\n");
	printf("reset		 	 - simulator reset\n");
	printf("hist		 	 - execution history\n");
	printf("stats <num|clear> 	 - execution statistics num or clear it.\n");
	printf("info		 	 - configuration info (caches etc.)\n");
	printf("dv <fromaddr> [<toaddr>] [<modname>] - dumps memory as verilog (use redirect)\n");
	printf("<cmd> > <filename>	 - redirect simulator stdout to <filename> (and not emulated printf)\n");
	printf("help			 - available commands (this list)\n");
}
 
void debugmem();
 
main(argc, argv)
     int argc;
     char *argv[];
{
	char *linestr;
	char item1[500], b2[500];
	char *redirstr;
	int hush;
 
	if (argc != 2) 
    {
      printf("Usage: %s <filename>\n", argv[0]);
      exit(-1);
    }
 
#ifdef HAVE_LIBREADLINE
  initialize_readline ();	/* Bind our completer. */
#endif	
 
	srand(getpid());
	version();
	init_defconfig();
	signal(SIGINT, ctrl_c);
	initstats();
	loadcode(argv[1]);
	uart_reset();
	reset();
 
	while(1) 
    {
#ifdef HAVE_LIBREADLINE
      linestr = readline("(sim) ");
#else
      printf ("(sim) ");
      linestr = fgets(b2, sizeof b2, stdin);
#endif
 
      if (!linestr)
        {
          break;
        }
      linestr = stripwhite (linestr);
 
#ifdef HAVE_LIBREADLINE
      if (strlen(linestr) == 0)
        {
          char *l = repeat_last_command ();
 
          if (l)
            {
              free (linestr);
              linestr = l;
            }
        }
 
      if (*linestr)
        {
          add_history (linestr);
        }
#endif /* HAVE_LIBREADLINE */
 
      if (redirstr = strstr(linestr, ">")) 
        {
          *redirstr = '\0';
          strtoken(&redirstr[1], item1, 1);
          freopen(item1, "w+", stdout);
        }
 
		strtoken(linestr, item1, 1);
		if (strcmp(item1, "q") == 0)	/* quit */
			exit(0);
		else
		if (strcmp(item1, "help") == 0)	/* help */
			help();
		else
		if (strcmp(item1, "t") == 0) {	/* trace */
			cont_run = 1;
		} else
		if (strcmp(item1, "dm") == 0) {	/* dump memory */
			char item2[20];
			char item3[20];
			static int from = 0, to = 0;
 
			strtoken(linestr, item2, 2);
			strtoken(linestr, item3, 3);
 
			if (strlen(item2)) {
				if (item2[0] == '_')
					from = eval_label(item2);
				else
					from = strtoul(item2, NULL, 0);
				to = from + 0x40;
			}
			if (strlen(item3))
				to = strtoul(item3, NULL, 0);
			dumpmemory(from, to);
      			printf("\n");
		} else
		if (strcmp(item1, "dv") == 0) {/* dump memory as verilog*/
			char item2[20];
			char item3[20];
			char item4[20];
			static int from = 0, to = 0;
 
			strtoken(linestr, item2, 2);
			strtoken(linestr, item3, 3);
			strtoken(linestr, item4, 4);
 
			if (strlen(item2)) {
				if (item2[0] == '_')
					from = eval_label(item2);
				else
					from = strtoul(item2, NULL, 0);
				to = from + 0x40;
			}
			if (strlen(item3))
				to = strtoul(item3, NULL, 0);
			if (!strlen(item4))
				strcpy(item4, "or1k_mem");
			dumpverilog(item4, from, to);
	  		printf("\n");
		} else
		if (strcmp(item1, "pm") == 0) {	/* patch memory */
			char item2[20];
			char item3[20];
			static int addr = 0;
 
			strtoken(linestr, item2, 2);
			strtoken(linestr, item3, 3);
			if (strlen(item2))
				if (item2[0] == '_')
					addr = eval_label(item2);
				else
					addr = strtoul(item2, NULL, 0);
			set_mem32(addr, strtoul(item3, NULL, 0));
		} else
		if (strcmp(item1, "pr") == 0) {	/* patch regs */
			char item2[20];
			char item3[20];
 
			strtoken(linestr, item2, 2);
			strtoken(linestr, item3, 3);
			set_reg32(item2, strtoul(item3, NULL, 0));
		} else
		if (strcmp(item1, "pc") == 0) {	/* patch PC */
			char item2[20];
 
			strtoken(linestr, item2, 2);
			pctemp = strtoul(item2, NULL, 0);
		} else
		if (strcmp(item1, "break") == 0) {	/* set/clear breakpoint */
			char item2[20];
 
			strtoken(linestr, item2, 2);
			set_insnbrkpoint(strtoul(item2, NULL, 0));
		} else
		if (strcmp(item1, "r") == 0) {	/* dump regs */
			dumpreg();
		} else
		if (strcmp(item1, "de") == 0) {	/* reset simulator */
			debugmem();
		} else
		if (strcmp(item1, "reset") == 0) {	/* reset simulator */
			uart_reset();
			reset();
		} else
		if (strcmp(item1, "hist") == 0) {	/* dump history */
			int i;
			for(i = HISTEXEC_LEN; i; i--)
				dumpmemory(histexec[i - 1], histexec[i - 1] + 4);
			printf("\n");
		} else
		if (strcmp(item1, "run") == 0) { /* run */
			char item2[20];
			char item3[20];
 
			strtoken(linestr, item2, 2);
			strtoken(linestr, item3, 3);
			if (strcmp(item3, "hush") == 0)
				hush = 1;
			else
				hush = 0;
			cont_run = strtoul(item2, NULL, 0);
		} else
		if (strcmp(item1, "stats") == 0) { /* stats */
			char item2[20];
			int i = 0;
 
			strtoken(linestr, item2, 2);
			if (strcmp(item2, "clear") == 0) {
				initstats();
				printf("Cleared.\n");
			} else {
				i = strtoul(item2, NULL, 0);
				printstats(i);
			}
		} else
		if (strcmp(item1, "info") == 0) { /* configuration info */
			bpb_info();
			btic_info();
			ic_info();
			dc_info();
			uart_status();
			sprs_status();
		} else {
      printf("%s: Unknown command.\n", linestr);
    }
 
		while(cont_run) {
			cont_run--;
			fetch();
			decode(&iqueue[0]);
			execute();
			uart_clock();
			if (!hush)
				dumpreg();
		}
 
		hush = 0;
		fflush(stdout);
		freopen("/dev/fd/0", "w+", stdout);
 
#ifdef HAVE_LIBREADLINE
    if (linestr)
      free (linestr);
#endif
 
	}
	exit(0);
}
 
#ifdef HAVE_LIBREADLINE
char *command_generator ();
char **sim_completion ();
 
/* Tell the GNU readline library how to complete.  We want to try to complete
   on command names if this is the first word in the line, or on filenames
   if not. */
void initialize_readline ()
{
  /* Allow conditional parsing of the ~/.inputrc file. */
  rl_readline_name = "or1ksim";
 
  /* Tell the completer that we want a crack first. */
  rl_attempted_completion_function = (CPPFunction *)sim_completion;
}
 
/* Attempt to complete on the contents of TEXT.  START and END bound the
   region of rl_line_buffer that contains the word to complete.  TEXT is
   the word to complete.  We can use the entire contents of rl_line_buffer
   in case we want to do some simple parsing.  Return the array of matches,
   or NULL if there aren't any. */
char **
sim_completion (text, start, end)
     char *text;
     int start, end;
{
  char **matches;
 
  matches = (char **)NULL;
 
  /* If this word is at the start of the line, then it is a command
     to complete.  Otherwise it is the name of a file in the current
     directory. */
  if (start == 0)
    matches = completion_matches (text, command_generator);
 
  return (matches);
}
 
/* Generator function for command completion.  STATE lets us know whether
   to start from scratch; without any state (i.e. STATE == 0), then we
   start at the top of the list. */
char *
command_generator (text, state)
     char *text;
     int state;
{
  static int list_index, len;
  char *name;
 
  /* If this is a new word to complete, initialize now.  This includes
     saving the length of TEXT for efficiency, and initializing the index
     variable to 0. */
  if (!state)
    {
      list_index = 0;
      len = strlen (text);
    }
 
  /* Return the next name which partially matches from the command list. */
  while (name = sim_commands[list_index])
    {
      list_index++;
 
      if (strncmp (name, text, len) == 0)
        return (dupstr(name));
    }
 
  /* If no names matched, then return NULL. */
  return ((char *)NULL);
}
 
char *
dupstr (s)
     char *s;
{
  char *r;
 
  r = xmalloc (strlen (s) + 1);
  strcpy (r, s);
  return (r);
}
 
/* Repeats the last command.  */
char *
repeat_last_command ()
{
  int offset = where_history ();
  HIST_ENTRY *hist;
 
  if (hist = history_get (offset))
    {
      return dupstr (hist->line);
    }
  return 0;
}
 
#endif
 
 
void debugmem() {
	int i;
	printf("starting to dump mem...\n");
	for(i=0; i<500; i++) {
		printf("i=%x :: ", i);
		if (mem[i].label)
			printf("label: %s |", mem[i].label->name);
		printf("%s ", mem[i].insn->insn);
		if(strlen(mem[i].insn->op1) != 0) printf("%s ", mem[i].insn->op1);
		if(strlen(mem[i].insn->op2) != 0) printf("%s ", mem[i].insn->op2);
		if(strlen(mem[i].insn->op3) != 0) printf("%s ", mem[i].insn->op3);
		if(strlen(mem[i].insn->op4) != 0) printf("%s ", mem[i].insn->op4);
		printf("\n");
	}
}