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280 lines
7.2 KiB
C
280 lines
7.2 KiB
C
/* Remote target communications for d10v connected via a serial line.
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Copyright 1988, 1991, 1992, 1993, 1994, 1995, 1996, 1997 Free
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Software Foundation, Inc.
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This file is part of GDB.
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software
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Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
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#include "defs.h"
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#include "gdb_string.h"
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#include <fcntl.h>
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#include "frame.h"
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#include "inferior.h"
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#include "bfd.h"
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#include "symfile.h"
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#include "target.h"
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#include "wait.h"
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/*#include "terminal.h"*/
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#include "gdbcmd.h"
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#include "objfiles.h"
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#include "gdb-stabs.h"
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#include "gdbthread.h"
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#include "dcache.h"
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#ifdef USG
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#include <sys/types.h>
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#endif
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#include <signal.h>
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#include "serial.h"
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/* Prototypes for local functions */
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static int remote_d10v_xfer_memory PARAMS ((CORE_ADDR memaddr, char *myaddr,
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int len, int should_write,
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struct target_ops *target));
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static void remote_d10v_open PARAMS ((char *name, int from_tty));
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static void remote_d10v_mourn PARAMS ((void));
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static void initialize_remote_d10v_ops PARAMS ((int copy_remote));
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/* Define the target subroutine names */
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struct target_ops remote_d10v_ops;
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extern struct target_ops remote_ops;
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extern struct target_ops extended_remote_ops;
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struct target_ops *inherited_ops = &extended_remote_ops;
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void
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init_remote_d10v_ops (copy_remote)
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int copy_remote;
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{
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printf_filtered ("Opening d10v ...\n");
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if (copy_remote)
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memcpy (&remote_d10v_ops, inherited_ops, sizeof remote_d10v_ops);
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remote_d10v_ops.to_shortname = "d10v";
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remote_d10v_ops.to_longname = "Remote d10v serial target in gdb-specific protocol";
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remote_d10v_ops.to_doc = "Use a remote d10v via a serial line, using a gdb-specific protocol.\n\
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Specify the serial device it is connected to (e.g. /dev/ttya).";
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remote_d10v_ops.to_open = remote_d10v_open;
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remote_d10v_ops.to_xfer_memory = remote_d10v_xfer_memory;
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remote_d10v_ops.to_mourn_inferior = remote_d10v_mourn;
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remote_d10v_ops.to_magic = OPS_MAGIC;
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}
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/* Open a connection to a remote debugger.
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NAME is the filename used for communication. */
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static void
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remote_d10v_open (name, from_tty)
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char *name;
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int from_tty;
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{
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init_remote_d10v_ops (1);
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open_remote_target (name, from_tty, &remote_d10v_ops,
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inherited_ops == &extended_remote_ops);
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}
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/* Worker function for remote_mourn. */
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static void
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remote_d10v_mourn ()
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{
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if (inherited_ops == &remote_ops)
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{
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unpush_target (&remote_d10v_ops);
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generic_mourn_inferior ();
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}
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/* see remote.c:extended_remote_mourn() for why an extended remote
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target doesn't mourn */
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}
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/* Read or write LEN bytes from inferior memory at MEMADDR, transferring
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to or from debugger address MYADDR. Write to inferior if SHOULD_WRITE is
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nonzero. Returns length of data written or read; 0 for error. */
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/* ARGSUSED */
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static int
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remote_d10v_xfer_memory(memaddr, myaddr, nr_bytes, write_p, target)
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CORE_ADDR memaddr;
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char *myaddr;
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int nr_bytes;
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int write_p;
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struct target_ops *target; /* ignored */
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{
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CORE_ADDR phys;
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CORE_ADDR seg;
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CORE_ADDR off;
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char *from = "unknown";
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char *to = "unknown";
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unsigned short imap0 = read_register (IMAP0_REGNUM);
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unsigned short imap1 = read_register (IMAP1_REGNUM);
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unsigned short dmap = read_register (DMAP_REGNUM);
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/* GDB interprets addresses as:
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0x00xxxxxx: Logical data address segment (DMAP translated memory)
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0x01xxxxxx: Logical instruction address segment (IMAP translated memory)
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0x10xxxxxx: Physical data memory segment (On-chip data memory)
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0x11xxxxxx: Physical instruction memory segment (On-chip insn memory)
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0x12xxxxxx: Phisical unified memory segment (Unified memory)
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The remote d10v board interprets addresses as:
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0x00xxxxxx: Phisical unified memory segment (Unified memory)
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0x01xxxxxx: Physical instruction memory segment (On-chip insn memory)
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0x02xxxxxx: Physical data memory segment (On-chip data memory)
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Translate according to current IMAP/dmap registers */
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enum {
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targ_unified = 0x00000000,
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targ_insn = 0x01000000,
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targ_data = 0x02000000,
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};
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seg = (memaddr >> 24);
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off = (memaddr & 0xffffffL);
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switch (seg)
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{
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case 0x00: /* in logical data address segment */
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{
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from = "logical-data";
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if (off <= 0x7fffL)
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{
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/* On chip data */
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phys = targ_data + off;
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if (off + nr_bytes > 0x7fffL)
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/* don't cross VM boundary */
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nr_bytes = 0x7fffL - off + 1;
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to = "chip-data";
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}
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else if (off <= 0xbfffL)
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{
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short map = dmap;
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if (map & 0x1000)
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{
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/* Instruction memory */
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phys = targ_insn | ((map & 0xf) << 14) | (off & 0x3fff);
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to = "chip-insn";
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}
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else
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{
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/* Unified memory */
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phys = targ_unified | ((map & 0x3ff) << 14) | (off & 0x3fff);
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to = "unified";
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}
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if (off + nr_bytes > 0xbfffL)
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/* don't cross VM boundary */
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nr_bytes = (0xbfffL - off + 1);
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}
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else
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{
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/* Logical address out side of data segments, not supported */
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return (0);
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}
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break;
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}
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case 0x01: /* in logical instruction address segment */
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{
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short map;
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from = "logical-insn";
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if (off <= 0x1ffffL)
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{
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map = imap0;
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}
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else if (off <= 0x3ffffL)
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{
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map = imap1;
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}
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else
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{
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/* Logical address outside of IMAP[01] segment, not
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supported */
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return (0);
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}
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if ((off & 0x1ffff) + nr_bytes > 0x1ffffL)
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{
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/* don't cross VM boundary */
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nr_bytes = 0x1ffffL - (off & 0x1ffffL) + 1;
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}
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if (map & 0x1000)
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/* Instruction memory */
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{
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phys = targ_insn | off;
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to = "chip-insn";
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}
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else
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{
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phys = ((map & 0x7fL) << 17) + (off & 0x1ffffL);
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if (phys > 0xffffffL)
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/* Address outside of unified address segment */
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return (0);
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phys |= targ_unified;
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to = "unified";
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}
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break;
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}
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case 0x10: /* Physical data memory segment */
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from = "phys-data";
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phys = targ_data | off;
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to = "chip-data";
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break;
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case 0x11: /* Physical instruction memory */
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from = "phys-insn";
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phys = targ_insn | off;
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to = "chip-insn";
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break;
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case 0x12: /* Physical unified memory */
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from = "phys-unified";
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phys = targ_unified | off;
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to = "unified";
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break;
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default:
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return (0);
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}
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printf_unfiltered ("%s-xfer: 0x%08lx -> 0x%08lx imap0=%04x imap1=%04x, dmap=%04x, %s->%s, %d bytes\n",
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(write_p ? "wr" : "rd"),
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(long) memaddr,
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(long) phys,
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(int) imap0, (int) imap1, (int) dmap,
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from, to,
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(int) nr_bytes);
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return inherited_ops->to_xfer_memory (phys, myaddr, nr_bytes, write_p, target);
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}
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void
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_initialize_remote_d10v ()
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{
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init_remote_d10v_ops (0);
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add_target (&remote_d10v_ops);
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}
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