gdb/rom68k-rom.c

   1 /* Remote target glue for the rom68k ROM monitor. This was running on a
   2 Motorola IDP board.
   3
   4    Copyright 1988, 1991, 1992, 1993, 1994 Free Software Foundation, Inc.
   5
   6 This file is part of GDB.
   7
   8 This program is free software; you can redistribute it and/or modify
   9 it under the terms of the GNU General Public License as published by
  10 the Free Software Foundation; either version 2 of the License, or
  11 (at your option) any later version.
  12
  13 This program is distributed in the hope that it will be useful,
  14 but WITHOUT ANY WARRANTY; without even the implied warranty of
  15 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  16 GNU General Public License for more details.
  17
  18 You should have received a copy of the GNU General Public License
  19 along with this program; if not, write to the Free Software
  20 Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.  */
  21
  22 #include "defs.h"
  23 #include "gdbcore.h"
  24 #include "target.h"
  25 #include "monitor.h"
  26 #include "serial.h"
  27
  28 static void rom68k_open PARAMS ((char *args, int from_tty));
  29
  30 static void
  31 rom68k_supply_register (regname, regnamelen, val, vallen)
  32      char *regname;
  33      int regnamelen;
  34      char *val;
  35      int vallen;
  36 {
  37   int numregs;
  38   int regno;
  39
  40   numregs = 1;
  41   regno = -1;
  42
  43   if (regnamelen == 2)
  44     switch (regname[0])
  45       {
  46       case 'S':
  47         if (regname[1] == 'R')
  48           regno = PS_REGNUM;
  49         break;
  50       case 'P':
  51         if (regname[1] == 'C')
  52           regno = PC_REGNUM;
  53         break;
  54       case 'D':
  55         if (regname[1] != 'R')
  56           break;
  57         regno = D0_REGNUM;
  58         numregs = 8;
  59         break;
  60       case 'A':
  61         if (regname[1] != 'R')
  62           break;
  63         regno = A0_REGNUM;
  64         numregs = 7;
  65         break;
  66       }
  67   else if (regnamelen == 3)
  68     switch (regname[0])
  69       {
  70       case 'I':
  71         if (regname[1] == 'S' && regname[2] == 'P')
  72           regno = SP_REGNUM;
  73       }
  74
  75   if (regno >= 0)
  76     while (numregs-- > 0)
  77       val = monitor_supply_register (regno++, val);
  78 }
  79
  80 /*
  81  * this array of registers need to match the indexes used by GDB. The
  82  * whole reason this exists is cause the various ROM monitors use
  83  * different strings than GDB does, and doesn't support all the
  84  * registers either. So, typing "info reg sp" becomes a "r30".
  85  */
  86 static char *rom68k_regnames[NUM_REGS] = {
  87   "D0", "D1", "D2", "D3", "D4", "D5", "D6", "D7",
  88   "A0", "A1", "A2", "A3", "A4", "A5", "A6", "ISP",
  89   "SR", "PC" };
  90
  91 /*
  92  * Define the monitor command strings. Since these are passed directly
  93  * through to a printf style function, we need can include formatting
  94  * strings. We also need a CR or LF on the end.
  95  */
  96
  97 static struct target_ops rom68k_ops;
  98
  99 static char *rom68k_loadtypes[] = {"none", "srec", "default", NULL};
 100 static char *rom68k_loadprotos[] = {"none", NULL};
 101
 102 static struct monitor_ops rom68k_cmds =
 103 {
 104   1,                            /* 1 for ASCII, 0 for binary */
 105   ".\r\r",                      /* monitor init string */
 106   "go \r",                      /* execute or usually GO command */
 107   "go \r",                      /* continue command */
 108   "st \r",                      /* single step */
 109   "db %x\r",                    /* set a breakpoint */
 110   "cb %x\r",                    /* clear a breakpoint */
 111   0,                            /* 0 for number, 1 for address */
 112   {
 113     "pm %x %x\r",               /* setmem.cmd (addr, value) */
 114     NULL,                       /* setreg.resp_delim */
 115     NULL,                       /* setreg.term */
 116     NULL,                       /* setreg.term_cmd */
 117   },
 118   {
 119     "dm %x %x\r",               /* getmem.cmd (addr, len) */
 120     "  ",                       /* getmem.resp_delim */
 121     NULL,                       /* getmem.term */
 122     NULL,                       /* getmem.term_cmd */
 123   },
 124   {
 125     "pr %s %x\r",               /* setreg.cmd (name, value) */
 126     NULL,                       /* setreg.resp_delim */
 127     NULL,                       /* setreg.term */
 128     NULL                        /* setreg.term_cmd */
 129   },
 130   {
 131     "pr %s\r",                  /* getreg.cmd (name) */
 132     ":  ",                      /* getreg.resp_delim */
 133     "= ",                       /* getreg.term */
 134     ".\r"                       /* getreg.term_cmd */
 135   },
 136                                 /* register_pattern */
 137   "\\(\\w+\\)=\\([0-9a-fA-F]+\\( +[0-9a-fA-F]+\\b\\)*\\)",
 138   rom68k_supply_register,       /* supply_register */
 139   "dc\r",                       /* download command */
 140   "ROM68K :->",                 /* monitor command prompt */
 141   "=",                          /* end-of-command delimitor */
 142   ".\r",                        /* optional command terminator */
 143   &rom68k_ops,                  /* target operations */
 144   rom68k_loadtypes,             /* loadtypes */
 145   rom68k_loadprotos,            /* loadprotos */
 146   "9600",                       /* supported baud rates */
 147   SERIAL_1_STOPBITS,            /* number of stop bits */
 148   rom68k_regnames               /* registers names */
 149   };
 150
 151 void
 152 rom68k_open(args, from_tty)
 153      char *args;
 154      int from_tty;
 155 {
 156   monitor_open (args, &rom68k_cmds, from_tty);
 157 }
 158
 159 void
 160 _initialize_rom68k ()
 161 {
 162   init_monitor_ops (&rom68k_ops);
 163
 164   rom68k_ops.to_shortname = "rom68k";
 165   rom68k_ops.to_longname = "Rom68k debug monitor for the IDP Eval board";
 166   rom68k_ops.to_doc = "Debug on a Motorola IDP eval board running the ROM68K monitor.\n\
 167 Specify the serial device it is connected to (e.g. /dev/ttya).";
 168   rom68k_ops.to_open = rom68k_open;
 169
 170   add_target (&rom68k_ops);
 171
 172   /* this is the default, since it's the only baud rate supported by the hardware */
 173   baud_rate = 9600;
 174 }