gdb/remote-d10v.c

   1 /* Remote target communications for d10v connected via a serial line.
   2    Copyright 1988, 1991, 1992, 1993, 1994, 1995, 1996, 1997 Free
   3    Software Foundation, Inc.
   4
   5    This file is part of GDB.
   6
   7    This program is free software; you can redistribute it and/or modify
   8    it under the terms of the GNU General Public License as published by
   9    the Free Software Foundation; either version 2 of the License, or
  10    (at your option) any later version.
  11
  12    This program is distributed in the hope that it will be useful,
  13    but WITHOUT ANY WARRANTY; without even the implied warranty of
  14    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15    GNU General Public License for more details.
  16
  17    You should have received a copy of the GNU General Public License
  18    along with this program; if not, write to the Free Software
  19    Foundation, Inc., 59 Temple Place - Suite 330,
  20    Boston, MA 02111-1307, USA.  */
  21
  22 #include "defs.h"
  23 #include "gdb_string.h"
  24 #include <fcntl.h>
  25 #include "frame.h"
  26 #include "inferior.h"
  27 #include "bfd.h"
  28 #include "symfile.h"
  29 #include "target.h"
  30 #include "wait.h"
  31 /*#include "terminal.h" */
  32 #include "gdbcmd.h"
  33 #include "objfiles.h"
  34 #include "gdb-stabs.h"
  35 #include "gdbthread.h"
  36
  37 #include "dcache.h"
  38
  39 #ifdef USG
  40 #include <sys/types.h>
  41 #endif
  42
  43 #include <signal.h>
  44 #include "serial.h"
  45
  46 /* Prototypes for local functions */
  47
  48 extern void _initialize_remote_d10v PARAMS ((void));
  49
  50 static void remote_d10v_open PARAMS ((char *name, int from_tty));
  51
  52 /* Define the target subroutine names */
  53 static struct target_ops remote_d10v_ops;
  54
  55 /* Open a connection to a remote debugger.
  56    NAME is the filename used for communication.  */
  57
  58 static void
  59 remote_d10v_open (name, from_tty)
  60      char *name;
  61      int from_tty;
  62 {
  63   pop_target ();
  64   push_remote_target (name, from_tty);
  65 }
  66
  67
  68 /* Translate a GDB virtual ADDR/LEN into a format the remote target
  69    understands.  Returns number of bytes that can be transfered
  70    starting at taddr, ZERO if no bytes can be transfered. */
  71 void
  72 remote_d10v_translate_xfer_address (memaddr, nr_bytes, targ_addr, targ_len)
  73      CORE_ADDR memaddr;
  74      int nr_bytes;
  75      CORE_ADDR *targ_addr;
  76      int *targ_len;
  77 {
  78   CORE_ADDR phys;
  79   CORE_ADDR seg;
  80   CORE_ADDR off;
  81   char *from = "unknown";
  82   char *to = "unknown";
  83   unsigned short imap0 = read_register (IMAP0_REGNUM);
  84   unsigned short imap1 = read_register (IMAP1_REGNUM);
  85   unsigned short dmap = read_register (DMAP_REGNUM);
  86
  87   /* GDB interprets addresses as:
  88
  89      0x00xxxxxx: Logical data address segment        (DMAP translated memory)
  90      0x01xxxxxx: Logical instruction address segment (IMAP translated memory)
  91      0x10xxxxxx: Physical data memory segment        (On-chip data memory)
  92      0x11xxxxxx: Physical instruction memory segment (On-chip insn memory)
  93      0x12xxxxxx: Phisical unified memory segment     (Unified memory)
  94
  95      The remote d10v board interprets addresses as:
  96
  97      0x00xxxxxx: Phisical unified memory segment     (Unified memory)
  98      0x01xxxxxx: Physical instruction memory segment (On-chip insn memory)
  99      0x02xxxxxx: Physical data memory segment        (On-chip data memory)
 100
 101      Translate according to current IMAP/dmap registers */
 102
 103   enum
 104     {
 105       targ_unified = 0x00000000,
 106       targ_insn = 0x01000000,
 107       targ_data = 0x02000000,
 108     };
 109
 110   seg = (memaddr >> 24);
 111   off = (memaddr & 0xffffffL);
 112
 113   switch (seg)
 114     {
 115     case 0x00:                  /* in logical data address segment */
 116       {
 117         from = "logical-data";
 118         if (off <= 0x7fffL)
 119           {
 120             /* On chip data */
 121             phys = targ_data + off;
 122             if (off + nr_bytes > 0x7fffL)
 123               /* don't cross VM boundary */
 124               nr_bytes = 0x7fffL - off + 1;
 125             to = "chip-data";
 126           }
 127         else if (off <= 0xbfffL)
 128           {
 129             short map = dmap;
 130             if (map & 0x1000)
 131               {
 132                 /* Instruction memory */
 133                 phys = targ_insn | ((map & 0xf) << 14) | (off & 0x3fff);
 134                 to = "chip-insn";
 135               }
 136             else
 137               {
 138                 /* Unified memory */
 139                 phys = targ_unified | ((map & 0x3ff) << 14) | (off & 0x3fff);
 140                 to = "unified";
 141               }
 142             if (off + nr_bytes > 0xbfffL)
 143               /* don't cross VM boundary */
 144               nr_bytes = (0xbfffL - off + 1);
 145           }
 146         else
 147           {
 148             /* Logical address out side of data segments, not supported */
 149             *targ_len = 0;
 150             return;
 151           }
 152         break;
 153       }
 154
 155     case 0x01:                  /* in logical instruction address segment */
 156       {
 157         short map;
 158         from = "logical-insn";
 159         if (off <= 0x1ffffL)
 160           {
 161             map = imap0;
 162           }
 163         else if (off <= 0x3ffffL)
 164           {
 165             map = imap1;
 166           }
 167         else
 168           {
 169             /* Logical address outside of IMAP[01] segment, not
 170                supported */
 171             *targ_len = 0;
 172             return;
 173           }
 174         if ((off & 0x1ffff) + nr_bytes > 0x1ffffL)
 175           {
 176             /* don't cross VM boundary */
 177             nr_bytes = 0x1ffffL - (off & 0x1ffffL) + 1;
 178           }
 179         if (map & 0x1000)
 180           /* Instruction memory */
 181           {
 182             phys = targ_insn | off;
 183             to = "chip-insn";
 184           }
 185         else
 186           {
 187             phys = ((map & 0x7fL) << 17) + (off & 0x1ffffL);
 188             if (phys > 0xffffffL)
 189               {
 190                 /* Address outside of unified address segment */
 191                 *targ_len = 0;
 192                 return;
 193               }
 194             phys |= targ_unified;
 195             to = "unified";
 196           }
 197         break;
 198       }
 199
 200     case 0x10:                  /* Physical data memory segment */
 201       from = "phys-data";
 202       phys = targ_data | off;
 203       to = "chip-data";
 204       break;
 205
 206     case 0x11:                  /* Physical instruction memory */
 207       from = "phys-insn";
 208       phys = targ_insn | off;
 209       to = "chip-insn";
 210       break;
 211
 212     case 0x12:                  /* Physical unified memory */
 213       from = "phys-unified";
 214       phys = targ_unified | off;
 215       to = "unified";
 216       break;
 217
 218     default:
 219       *targ_len = 0;
 220       return;
 221     }
 222
 223
 224   *targ_addr = phys;
 225   *targ_len = nr_bytes;
 226 }
 227
 228
 229 void
 230 _initialize_remote_d10v ()
 231 {
 232   remote_d10v_ops.to_shortname = "d10v";
 233   remote_d10v_ops.to_longname = "Remote d10v serial target in gdb-specific protocol";
 234   remote_d10v_ops.to_doc = "Use a remote d10v via a serial line, using a gdb-specific protocol.\n\
 235 Specify the serial device it is connected to (e.g. /dev/ttya).";
 236   remote_d10v_ops.to_open = remote_d10v_open;
 237
 238   add_target (&remote_d10v_ops);
 239 }