aboutsummaryrefslogtreecommitdiff
path: root/gdb/remote-d10v.c
blob: d529b2180f6a59d9d980ac8197f569e715741203 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
/* Remote target communications for d10v connected via a serial line.
   Copyright 1988, 1991, 1992, 1993, 1994, 1995, 1996, 1997 Free
   Software Foundation, Inc.

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 "gdb_string.h"
#include <fcntl.h>
#include "frame.h"
#include "inferior.h"
#include "bfd.h"
#include "symfile.h"
#include "target.h"
#include "wait.h"
/*#include "terminal.h"*/
#include "gdbcmd.h"
#include "objfiles.h"
#include "gdb-stabs.h"
#include "gdbthread.h"

#include "dcache.h"

#ifdef USG
#include <sys/types.h>
#endif

#include <signal.h>
#include "serial.h"

/* Prototypes for local functions */

static void remote_d10v_open PARAMS ((char *name, int from_tty));

/* Define the target subroutine names */
static struct target_ops remote_d10v_ops;

/* Open a connection to a remote debugger.
   NAME is the filename used for communication.  */

static void
remote_d10v_open (name, from_tty)
     char *name;
     int from_tty;
{
  pop_target ();
  push_remote_target (name, from_tty);
}


/* Translate a GDB virtual ADDR/LEN into a format the remote target
   understands.  Returns number of bytes that can be transfered
   starting at taddr, ZERO if no bytes can be transfered. */
int
remote_d10v_translate_xfer_address (memaddr, nr_bytes, taddr)
     CORE_ADDR memaddr;
     int nr_bytes;
     CORE_ADDR *taddr;
{
  CORE_ADDR phys;
  CORE_ADDR seg;
  CORE_ADDR off;
  char *from = "unknown";
  char *to = "unknown";
  unsigned short imap0 = read_register (IMAP0_REGNUM);
  unsigned short imap1 = read_register (IMAP1_REGNUM);
  unsigned short dmap = read_register (DMAP_REGNUM);

  /* GDB interprets addresses as:

       0x00xxxxxx: Logical data address segment        (DMAP translated memory)
       0x01xxxxxx: Logical instruction address segment (IMAP translated memory)
       0x10xxxxxx: Physical data memory segment        (On-chip data memory)
       0x11xxxxxx: Physical instruction memory segment (On-chip insn memory)
       0x12xxxxxx: Phisical unified memory segment     (Unified memory)

     The remote d10v board interprets addresses as:

       0x00xxxxxx: Phisical unified memory segment     (Unified memory)
       0x01xxxxxx: Physical instruction memory segment (On-chip insn memory)
       0x02xxxxxx: Physical data memory segment        (On-chip data memory)

     Translate according to current IMAP/dmap registers */

  enum {
    targ_unified = 0x00000000,
    targ_insn = 0x01000000,
    targ_data = 0x02000000,
  };

  seg = (memaddr >> 24);
  off = (memaddr & 0xffffffL);

  switch (seg) 
      {
      case 0x00: /* in logical data address segment */
	{
	  from = "logical-data";
	  if (off <= 0x7fffL)
	    {
	      /* On chip data */
	      phys = targ_data + off;
	      if (off + nr_bytes > 0x7fffL)
		/* don't cross VM boundary */
		nr_bytes = 0x7fffL - off + 1;
	      to = "chip-data";
	    }
	  else if (off <= 0xbfffL)
	    {
	      short map = dmap;
	      if (map & 0x1000)
		{
		  /* Instruction memory */
		  phys = targ_insn | ((map & 0xf) << 14) | (off & 0x3fff);
		  to = "chip-insn";
		}
	      else
		{
		  /* Unified memory */
		  phys = targ_unified | ((map & 0x3ff) << 14) | (off & 0x3fff);
		  to = "unified";
		}
	      if (off + nr_bytes > 0xbfffL)
		/* don't cross VM boundary */
		nr_bytes = (0xbfffL - off + 1);
	    }	    
	  else
	    {
	      /* Logical address out side of data segments, not supported */
	      return (0);
	    }
	  break;
	}

      case 0x01: /* in logical instruction address segment */
	{
	  short map;
	  from = "logical-insn";
	  if (off <= 0x1ffffL)
	    {
	      map = imap0;
	    }
	  else if (off <= 0x3ffffL)
	    {
	      map = imap1;
	    }
	  else
	    {
	      /* Logical address outside of IMAP[01] segment, not
		 supported */
	      return (0);
	    }
	  if ((off & 0x1ffff) + nr_bytes > 0x1ffffL)
	    {
	      /* don't cross VM boundary */
	      nr_bytes = 0x1ffffL - (off & 0x1ffffL) + 1;
	    }
	  if (map & 0x1000)
	    /* Instruction memory */
	    {
	      phys = targ_insn | off;
	      to = "chip-insn";
	    }
	  else
	    {
	      phys = ((map & 0x7fL) << 17) + (off & 0x1ffffL);
	      if (phys > 0xffffffL)
		/* Address outside of unified address segment */
		return (0);
	      phys |= targ_unified;
	      to = "unified";
	    }
	  break;
	}

      case 0x10: /* Physical data memory segment */
	from = "phys-data";
	phys = targ_data | off;
	to = "chip-data";
	break;

      case 0x11: /* Physical instruction memory */
	from = "phys-insn";
	phys = targ_insn | off;
	to = "chip-insn";
	break;

      case 0x12: /* Physical unified memory */
	from = "phys-unified";
	phys = targ_unified | off;
	to = "unified";
	break;

      default:
	return (0);
      }


  *taddr = phys;
  return nr_bytes;
}


void
_initialize_remote_d10v ()
{
  remote_d10v_ops.to_shortname = "d10v";
  remote_d10v_ops.to_longname = "Remote d10v serial target in gdb-specific protocol";
  remote_d10v_ops.to_doc = "Use a remote d10v via a serial line, using a gdb-specific protocol.\n\
Specify the serial device it is connected to (e.g. /dev/ttya).";
  remote_d10v_ops.to_open = remote_d10v_open;

  add_target (&remote_d10v_ops);
}