/* Remote debugging interface for EST-300 ICE, for GDB
   Copyright 1995 Free Software Foundation, Inc.
   Contributed by Cygnus Support.

   Written by Steve Chamberlain for Cygnus Support.
   Re-written by Stu Grossman of Cygnus Support

This file is part of GDB.

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., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.  */

#include "defs.h"
#include "gdbcore.h"
#include "target.h"
#include "monitor.h"
#include "serial.h"

static void est_open PARAMS ((char *args, int from_tty));

static void
est_supply_register (regname, regnamelen, val, vallen)
     char *regname;
     int regnamelen;
     char *val;
     int vallen;
{
  int regno;

  if (regnamelen != 2)
    return;

  switch (regname[0])
    {
    case 'S':
      if (regname[1] != 'R')
	return;
      regno = PS_REGNUM;
      break;
    case 'P':
      if (regname[1] != 'C')
	return;
      regno = PC_REGNUM;
      break;
    case 'D':
      if (regname[1] < '0' || regname[1] > '7')
	return;
      regno = regname[1] - '0' + D0_REGNUM;
      break;
    case 'A':
      if (regname[1] < '0' || regname[1] > '7')
	return;
      regno = regname[1] - '0' + A0_REGNUM;
      break;
    default:
      return;
    }

  monitor_supply_register (regno, val);
}

/*
 * This array of registers needs to match the indexes used by GDB. The
 * whole reason this exists is because the various ROM monitors use
 * different names than GDB does, and don't support all the
 * registers either. So, typing "info reg sp" becomes a "r30".
 */

static char *est_regnames[NUM_REGS] =
{
  "D0", "D1", "D2", "D3", "D4", "D5", "D6", "D7",
  "A0", "A1", "A2", "A3", "A4", "A5", "A6", "A7",
  "SR", "PC",
};

/*
 * Define the monitor command strings. Since these are passed directly
 * through to a printf style function, we need can include formatting
 * strings. We also need a CR or LF on the end.
 */

static struct target_ops est_ops;

static char *est_inits[] = {"he\r", /* Resets the prompt, and clears repeated cmds */
			      NULL};

static struct monitor_ops est_cmds =
{
  MO_CLR_BREAK_USES_ADDR | MO_FILL_USES_ADDR | MO_NEED_REGDUMP_AFTER_CONT |
  MO_SREC_ACK | MO_SREC_ACK_PLUS,
  est_inits,			/* Init strings */
  "go\r",			/* continue command */
  "sidr\r",			/* single step */
  "\003",			/* ^C interrupts the program */
  "sb %x\r",			/* set a breakpoint */
  "rb %x\r",			/* clear a breakpoint */
  "rb\r",			/* clear all breakpoints */
  "bfb %x %x %x\r",		/* fill (start end val) */
  {
    "smb %x %x\r",		/* setmem.cmdb (addr, value) */
    "smw %x %x\r",		/* setmem.cmdw (addr, value) */
    "sml %x %x\r",		/* setmem.cmdl (addr, value) */
    NULL,			/* setmem.cmdll (addr, value) */
    NULL,			/* setreg.resp_delim */
    NULL,			/* setreg.term */
    NULL,			/* setreg.term_cmd */
  },
  {
    "dmb %x %x\r",		/* getmem.cmdb (addr, len) */
    "dmw %x %x\r",		/* getmem.cmdw (addr, len) */
    "dml %x %x\r",		/* getmem.cmdl (addr, len) */
    NULL,			/* getmem.cmdll (addr, len) */
    ": ",			/* getmem.resp_delim */
    NULL,			/* getmem.term */
    NULL,			/* getmem.term_cmd */
  },
  {
    "sr %s %x\r",		/* setreg.cmd (name, value) */
    NULL,			/* setreg.resp_delim */
    NULL,			/* setreg.term */
    NULL			/* setreg.term_cmd */
  },
  {
    "dr %s\r",			/* getreg.cmd (name) */
    " = ",			/* getreg.resp_delim */
    NULL,			/* getreg.term */
    NULL			/* getreg.term_cmd */
  },
  "dr\r",			/* dump_registers */
  "\\(\\w+\\) = \\([0-9a-fA-F]+\\)", /* register_pattern */
  est_supply_register,		/* supply_register */
  NULL,				/* load_routine (defaults to SRECs) */
  "dl\r",			/* download command */
  "+",				/* load response */
  ">BKM>",			/* monitor command prompt */
  "\r",				/* end-of-line terminator */
  NULL,				/* optional command terminator */
  &est_ops,			/* target operations */
  SERIAL_1_STOPBITS,		/* number of stop bits */
  est_regnames,			/* registers names */
  MONITOR_OPS_MAGIC		/* magic */
  };

static void
est_open(args, from_tty)
     char *args;
     int from_tty;
{
  monitor_open (args, &est_cmds, from_tty);
}

void
_initialize_est ()
{
  init_monitor_ops (&est_ops);

  est_ops.to_shortname = "est";
  est_ops.to_longname = "EST background debug monitor";
  est_ops.to_doc = "Debug via the EST BDM.\n\
Specify the serial device it is connected to (e.g. /dev/ttya).";
  est_ops.to_open = est_open;

  add_target (&est_ops);
}
