1/* Remote debugging interface for CPU32Bug Rom monitor for GDB, the GNU debugger.
2   Copyright 1995, 1996, 1998, 1999, 2000, 2001
3   Free Software Foundation, Inc.
4
5   Written by Stu Grossman 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
33static void cpu32bug_open (char *args, int from_tty);
34
35static void
36cpu32bug_supply_register (char *regname, int regnamelen, char *val, int vallen)
37{
38  int regno;
39
40  if (regnamelen != 2)
41    return;
42
43  switch (regname[0])
44    {
45    case 'S':
46      if (regname[1] != 'R')
47	return;
48      regno = PS_REGNUM;
49      break;
50    case 'P':
51      if (regname[1] != 'C')
52	return;
53      regno = PC_REGNUM;
54      break;
55    case 'D':
56      if (regname[1] < '0' || regname[1] > '7')
57	return;
58      regno = regname[1] - '0' + M68K_D0_REGNUM;
59      break;
60    case 'A':
61      if (regname[1] < '0' || regname[1] > '7')
62	return;
63      regno = regname[1] - '0' + M68K_A0_REGNUM;
64      break;
65    default:
66      return;
67    }
68
69  monitor_supply_register (regno, val);
70}
71
72/*
73 * This array of registers needs to match the indexes used by GDB. The
74 * whole reason this exists is because the various ROM monitors use
75 * different names than GDB does, and don't support all the
76 * registers either. So, typing "info reg sp" becomes an "A7".
77 */
78
79static const char *
80cpu32bug_regname (int index)
81{
82  static char *regnames[] =
83  {
84    "D0", "D1", "D2", "D3", "D4", "D5", "D6", "D7",
85    "A0", "A1", "A2", "A3", "A4", "A5", "A6", "A7",
86    "SR", "PC"
87  };
88
89  if ((index >= (sizeof (regnames) / sizeof (regnames[0])))
90       || (index < 0) || (index >= NUM_REGS))
91    return NULL;
92  else
93    return regnames[index];
94}
95
96/*
97 * Define the monitor command strings. Since these are passed directly
98 * through to a printf style function, we need can include formatting
99 * strings. We also need a CR or LF on the end.
100 */
101
102static struct target_ops cpu32bug_ops;
103
104static char *cpu32bug_inits[] =
105{"\r", NULL};
106
107static struct monitor_ops cpu32bug_cmds;
108
109static void
110init_cpu32bug_cmds (void)
111{
112  cpu32bug_cmds.flags = MO_CLR_BREAK_USES_ADDR;
113  cpu32bug_cmds.init = cpu32bug_inits;	/* Init strings */
114  cpu32bug_cmds.cont = "g\r";	/* continue command */
115  cpu32bug_cmds.step = "t\r";	/* single step */
116  cpu32bug_cmds.stop = NULL;	/* interrupt command */
117  cpu32bug_cmds.set_break = "br %x\r";	/* set a breakpoint */
118  cpu32bug_cmds.clr_break = "nobr %x\r";	/* clear a breakpoint */
119  cpu32bug_cmds.clr_all_break = "nobr\r";	/* clear all breakpoints */
120  cpu32bug_cmds.fill = "bf %x:%x %x;b\r";	/* fill (start count val) */
121  cpu32bug_cmds.setmem.cmdb = "ms %x %02x\r";	/* setmem.cmdb (addr, value) */
122  cpu32bug_cmds.setmem.cmdw = "ms %x %04x\r";	/* setmem.cmdw (addr, value) */
123  cpu32bug_cmds.setmem.cmdl = "ms %x %08x\r";	/* setmem.cmdl (addr, value) */
124  cpu32bug_cmds.setmem.cmdll = NULL;	/* setmem.cmdll (addr, value) */
125  cpu32bug_cmds.setmem.resp_delim = NULL;	/* setreg.resp_delim */
126  cpu32bug_cmds.setmem.term = NULL;	/* setreg.term */
127  cpu32bug_cmds.setmem.term_cmd = NULL;		/* setreg.term_cmd */
128  cpu32bug_cmds.getmem.cmdb = "md %x:%x;b\r";	/* getmem.cmdb (addr, len) */
129  cpu32bug_cmds.getmem.cmdw = "md %x:%x;b\r";	/* getmem.cmdw (addr, len) */
130  cpu32bug_cmds.getmem.cmdl = "md %x:%x;b\r";	/* getmem.cmdl (addr, len) */
131  cpu32bug_cmds.getmem.cmdll = NULL;	/* getmem.cmdll (addr, len) */
132  cpu32bug_cmds.getmem.resp_delim = " ";	/* getmem.resp_delim */
133  cpu32bug_cmds.getmem.term = NULL;	/* getmem.term */
134  cpu32bug_cmds.getmem.term_cmd = NULL;		/* getmem.term_cmd */
135  cpu32bug_cmds.setreg.cmd = "rs %s %x\r";	/* setreg.cmd (name, value) */
136  cpu32bug_cmds.setreg.resp_delim = NULL;	/* setreg.resp_delim */
137  cpu32bug_cmds.setreg.term = NULL;	/* setreg.term */
138  cpu32bug_cmds.setreg.term_cmd = NULL;		/* setreg.term_cmd */
139  cpu32bug_cmds.getreg.cmd = "rs %s\r";		/* getreg.cmd (name) */
140  cpu32bug_cmds.getreg.resp_delim = "=";	/* getreg.resp_delim */
141  cpu32bug_cmds.getreg.term = NULL;	/* getreg.term */
142  cpu32bug_cmds.getreg.term_cmd = NULL;		/* getreg.term_cmd */
143  cpu32bug_cmds.dump_registers = "rd\r";	/* dump_registers */
144  cpu32bug_cmds.register_pattern = "\\(\\w+\\) +=\\([0-9a-fA-F]+\\b\\)";	/* register_pattern */
145  cpu32bug_cmds.supply_register = cpu32bug_supply_register;	/* supply_register */
146  cpu32bug_cmds.load_routine = NULL;	/* load_routine (defaults to SRECs) */
147  cpu32bug_cmds.load = "lo\r";	/* download command */
148  cpu32bug_cmds.loadresp = "\n";	/* load response */
149  cpu32bug_cmds.prompt = "CPU32Bug>";	/* monitor command prompt */
150  cpu32bug_cmds.line_term = "\r";	/* end-of-line terminator */
151  cpu32bug_cmds.cmd_end = NULL;	/* optional command terminator */
152  cpu32bug_cmds.target = &cpu32bug_ops;		/* target operations */
153  cpu32bug_cmds.stopbits = SERIAL_1_STOPBITS;	/* number of stop bits */
154  cpu32bug_cmds.regnames = NULL;	/* registers names */
155  cpu32bug_cmds.regname = cpu32bug_regname;
156  cpu32bug_cmds.magic = MONITOR_OPS_MAGIC;	/* magic */
157};				/* init_cpu32bug_cmds */
158
159static void
160cpu32bug_open (char *args, int from_tty)
161{
162  monitor_open (args, &cpu32bug_cmds, from_tty);
163}
164
165extern initialize_file_ftype _initialize_cpu32bug_rom; /* -Wmissing-prototypes */
166
167void
168_initialize_cpu32bug_rom (void)
169{
170  init_cpu32bug_cmds ();
171  init_monitor_ops (&cpu32bug_ops);
172
173  cpu32bug_ops.to_shortname = "cpu32bug";
174  cpu32bug_ops.to_longname = "CPU32Bug monitor";
175  cpu32bug_ops.to_doc = "Debug via the CPU32Bug monitor.\n\
176Specify the serial device it is connected to (e.g. /dev/ttya).";
177  cpu32bug_ops.to_open = cpu32bug_open;
178
179  add_target (&cpu32bug_ops);
180}
181