1/* Remote debugging interface for ABug Rom monitor for GDB, the GNU debugger.
2   Copyright 1995, 1996, 1998, 1999, 2000, 2001
3   Free Software Foundation, Inc.
4
5   Written by Rob Savoye of Cygnus Support
6
7   This file is part of GDB.
8
9   This program is free software; you can redistribute it and/or modify
10   it under the terms of the GNU General Public License as published by
11   the Free Software Foundation; either version 2 of the License, or
12   (at your option) any later version.
13
14   This program is distributed in the hope that it will be useful,
15   but WITHOUT ANY WARRANTY; without even the implied warranty of
16   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
17   GNU General Public License for more details.
18
19   You should have received a copy of the GNU General Public License
20   along with this program; if not, write to the Free Software
21   Foundation, Inc., 59 Temple Place - Suite 330,
22   Boston, MA 02111-1307, USA.  */
23
24#include "defs.h"
25#include "gdbcore.h"
26#include "target.h"
27#include "monitor.h"
28#include "serial.h"
29#include "regcache.h"
30
31#include "m68k-tdep.h"
32
33/* Prototypes for local functions. */
34
35static void abug_open (char *args, int from_tty);
36
37static void
38abug_supply_register (char *regname, int regnamelen, char *val, int vallen)
39{
40  int regno;
41
42  if (regnamelen != 2)
43    return;
44
45  switch (regname[0])
46    {
47    case 'S':
48      if (regname[1] != 'R')
49	return;
50      regno = PS_REGNUM;
51      break;
52    case 'P':
53      if (regname[1] != 'C')
54	return;
55      regno = PC_REGNUM;
56      break;
57    case 'D':
58      if (regname[1] < '0' || regname[1] > '7')
59	return;
60      regno = regname[1] - '0' + M68K_D0_REGNUM;
61      break;
62    case 'A':
63      if (regname[1] < '0' || regname[1] > '7')
64	return;
65      regno = regname[1] - '0' + M68K_A0_REGNUM;
66      break;
67    default:
68      return;
69    }
70
71  monitor_supply_register (regno, val);
72}
73
74/*
75 * This array of registers needs to match the indexes used by GDB. The
76 * whole reason this exists is because the various ROM monitors use
77 * different names than GDB does, and don't support all the
78 * registers either. So, typing "info reg sp" becomes an "A7".
79 */
80
81static const char *
82abug_regname (int index)
83{
84  static char *regnames[] =
85  {
86    "D0", "D1", "D2", "D3", "D4", "D5", "D6", "D7",
87    "A0", "A1", "A2", "A3", "A4", "A5", "A6", "A7",
88    "PC",
89  };
90
91  if ((index >= (sizeof (regnames) / sizeof (regnames[0])))
92       || (index < 0) || (index >= NUM_REGS))
93    return NULL;
94  else
95    return regnames[index];
96}
97
98/*
99 * Define the monitor command strings. Since these are passed directly
100 * through to a printf style function, we need can include formatting
101 * strings. We also need a CR or LF on the end.
102 */
103
104static struct target_ops abug_ops;
105
106static char *abug_inits[] =
107{"\r", NULL};
108
109static struct monitor_ops abug_cmds;
110
111static void
112init_abug_cmds (void)
113{
114  abug_cmds.flags = MO_CLR_BREAK_USES_ADDR;
115  abug_cmds.init = abug_inits;	/* Init strings */
116  abug_cmds.cont = "g\r";	/* continue command */
117  abug_cmds.step = "t\r";	/* single step */
118  abug_cmds.stop = NULL;	/* interrupt command */
119  abug_cmds.set_break = "br %x\r";	/* set a breakpoint */
120  abug_cmds.clr_break = "nobr %x\r";	/* clear a breakpoint */
121  abug_cmds.clr_all_break = "nobr\r";	/* clear all breakpoints */
122  abug_cmds.fill = "bf %x:%x %x;b\r";	/* fill (start count val) */
123  abug_cmds.setmem.cmdb = "ms %x %02x\r";	/* setmem.cmdb (addr, value) */
124  abug_cmds.setmem.cmdw = "ms %x %04x\r";	/* setmem.cmdw (addr, value) */
125  abug_cmds.setmem.cmdl = "ms %x %08x\r";	/* setmem.cmdl (addr, value) */
126  abug_cmds.setmem.cmdll = NULL;	/* setmem.cmdll (addr, value) */
127  abug_cmds.setmem.resp_delim = NULL;	/* setreg.resp_delim */
128  abug_cmds.setmem.term = NULL;	/* setreg.term */
129  abug_cmds.setmem.term_cmd = NULL;	/* setreg.term_cmd */
130  abug_cmds.getmem.cmdb = "md %x:%x;b\r";	/* getmem.cmdb (addr, len) */
131  abug_cmds.getmem.cmdw = "md %x:%x;b\r";	/* getmem.cmdw (addr, len) */
132  abug_cmds.getmem.cmdl = "md %x:%x;b\r";	/* getmem.cmdl (addr, len) */
133  abug_cmds.getmem.cmdll = NULL;	/* getmem.cmdll (addr, len) */
134  abug_cmds.getmem.resp_delim = " ";	/* getmem.resp_delim */
135  abug_cmds.getmem.term = NULL;	/* getmem.term */
136  abug_cmds.getmem.term_cmd = NULL;	/* getmem.term_cmd */
137  abug_cmds.setreg.cmd = "rm %s %x\r";	/* setreg.cmd (name, value) */
138  abug_cmds.setreg.resp_delim = "=";	/* setreg.resp_delim */
139  abug_cmds.setreg.term = "? ";	/* setreg.term */
140  abug_cmds.setreg.term_cmd = ".\r";	/* setreg.term_cmd */
141  abug_cmds.getreg.cmd = "rm %s\r";	/* getreg.cmd (name) */
142  abug_cmds.getreg.resp_delim = "=";	/* getreg.resp_delim */
143  abug_cmds.getreg.term = "? ";	/* getreg.term */
144  abug_cmds.getreg.term_cmd = ".\r";	/* getreg.term_cmd */
145  abug_cmds.dump_registers = "rd\r";	/* dump_registers */
146  abug_cmds.register_pattern = "\\(\\w+\\) +=\\([0-9a-fA-F]+\\b\\)";	/* register_pattern */
147  abug_cmds.supply_register = abug_supply_register;	/* supply_register */
148  abug_cmds.load_routine = NULL;	/* load_routine (defaults to SRECs) */
149  abug_cmds.load = "lo 0\r";	/* download command */
150  abug_cmds.loadresp = "\n";	/* load response */
151  abug_cmds.prompt = "135Bug>";	/* monitor command prompt */
152  abug_cmds.line_term = "\r";	/* end-of-line terminator */
153  abug_cmds.cmd_end = NULL;	/* optional command terminator */
154  abug_cmds.target = &abug_ops;	/* target operations */
155  abug_cmds.stopbits = SERIAL_1_STOPBITS;	/* number of stop bits */
156  abug_cmds.regnames = NULL;	/* registers names */
157  abug_cmds.regname = abug_regname;
158  abug_cmds.magic = MONITOR_OPS_MAGIC;	/* magic */
159};
160
161static void
162abug_open (char *args, int from_tty)
163{
164  monitor_open (args, &abug_cmds, from_tty);
165}
166
167extern initialize_file_ftype _initialize_abug_rom; /* -Wmissing-prototypes */
168
169void
170_initialize_abug_rom (void)
171{
172  init_abug_cmds ();
173  init_monitor_ops (&abug_ops);
174
175  abug_ops.to_shortname = "abug";
176  abug_ops.to_longname = "ABug monitor";
177  abug_ops.to_doc = "Debug via the ABug monitor.\n\
178Specify the serial device it is connected to (e.g. /dev/ttya).";
179  abug_ops.to_open = abug_open;
180
181  add_target (&abug_ops);
182}
183