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/* 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 */
extern void _initialize_remote_d10v PARAMS ((void));
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. */
void
remote_d10v_translate_xfer_address (memaddr, nr_bytes, targ_addr, targ_len)
CORE_ADDR memaddr;
int nr_bytes;
CORE_ADDR *targ_addr;
int *targ_len;
{
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 */
*targ_len = 0;
return;
}
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 */
*targ_len = 0;
return;
}
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 */
*targ_len = 0;
return;
}
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:
*targ_len = 0;
return;
}
*targ_addr = phys;
*targ_len = 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);
}
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