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/* Remote target communications for the Macraigor Systems BDM Wiggler
talking to a Motorola PPC 505.
Copyright 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 "gdbcore.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 "gdbcmd.h"
#include "objfiles.h"
#include "gdb-stabs.h"
#include <sys/types.h>
#include <signal.h>
#include "serial.h"
#include "ocd.h"
static void bdm_ppc_open PARAMS ((char *name, int from_tty));
static int bdm_ppc_wait PARAMS ((int pid,
struct target_waitstatus *target_status));
static void bdm_ppc_fetch_registers PARAMS ((int regno));
static void bdm_ppc_store_registers PARAMS ((int regno));
extern struct target_ops bdm_ppc_ops; /* Forward decl */
/* Open a connection to a remote debugger.
NAME is the filename used for communication. */
static void
bdm_ppc_open (name, from_tty)
char *name;
int from_tty;
{
ocd_open (name, from_tty, OCD_TARGET_MOTO_PPC, &bdm_ppc_ops);
}
/* Wait until the remote machine stops, then return,
storing status in STATUS just as `wait' would.
Returns "pid" (though it's not clear what, if anything, that
means in the case of this target). */
static int
bdm_ppc_wait (pid, target_status)
int pid;
struct target_waitstatus *target_status;
{
int stop_reason;
target_status->kind = TARGET_WAITKIND_STOPPED;
stop_reason = ocd_wait ();
if (stop_reason)
{
target_status->value.sig = TARGET_SIGNAL_INT;
return inferior_pid;
}
target_status->value.sig = TARGET_SIGNAL_TRAP; /* XXX for now */
{
unsigned long ecr, der;
ecr = ocd_read_bdm_register (148); /* Read the exception cause register */
der = ocd_read_bdm_register (149); /* Read the debug enables register */
fprintf_unfiltered (gdb_stdout, "ecr = 0x%x, der = 0x%x\n", ecr, der);
}
return inferior_pid;
}
static int bdm_regmap[] = {BDM_REGMAP};
/* Read the remote registers into regs.
The Wiggler uses the following codes to access the registers:
0 -> 1023 SPR 0 -> 1023
0 - SPR 0 - MQ
1 - SPR 1 - XER
8 - SPR 8 - LR
9 - SPR 9 - CTR (known as cnt in GDB)
26 - SPR 26 - SRR0 - pc
1024 -> 2047 DCR 0 -> DCR 1023 (IBM PPC 4xx only)
2048 -> 2079 R0 -> R31
2080 -> 2143 FP0 -> FP31 (64 bit regs)
2144 CR (known as cnd in GDB)
2145 FPCSR
2146 MSR (known as ps in GDB)
*/
static void
bdm_ppc_fetch_registers (regno)
int regno;
{
int i;
unsigned char *regs;
int first_regno, last_regno;
int first_bdm_regno, last_bdm_regno;
int reglen;
if (regno == -1)
{
first_regno = 0;
last_regno = NUM_REGS - 1;
first_bdm_regno = 0;
last_bdm_regno = BDM_NUM_REGS - 1;
}
else
{
first_regno = regno;
last_regno = regno;
first_bdm_regno = bdm_regmap [regno];
last_bdm_regno = bdm_regmap [regno];
}
if (first_bdm_regno == -1)
{
supply_register (first_regno, NULL);
return; /* Unsupported register */
}
regs = ocd_read_bdm_registers (first_bdm_regno, last_bdm_regno, ®len);
for (i = first_regno; i <= last_regno; i++)
{
int bdm_regno, regoffset;
bdm_regno = bdm_regmap [i];
if (bdm_regno != -1)
{
regoffset = bdm_regno - first_bdm_regno;
if (regoffset >= reglen / 4)
continue;
supply_register (i, regs + 4 * regoffset);
}
else
supply_register (i, NULL); /* Unsupported register */
}
}
/* Store register REGNO, or all registers if REGNO == -1, from the contents
of REGISTERS. FIXME: ignores errors. */
static void
bdm_ppc_store_registers (regno)
int regno;
{
int i;
int first_regno, last_regno;
int first_bdm_regno, last_bdm_regno;
if (regno == -1)
{
first_regno = 0;
last_regno = NUM_REGS - 1;
first_bdm_regno = 0;
last_bdm_regno = BDM_NUM_REGS - 1;
}
else
{
first_regno = regno;
last_regno = regno;
first_bdm_regno = bdm_regmap [regno];
last_bdm_regno = bdm_regmap [regno];
}
if (first_bdm_regno == -1)
return; /* Unsupported register */
for (i = first_regno; i <= last_regno; i++)
{
int bdm_regno;
bdm_regno = bdm_regmap [i];
ocd_write_bdm_registers (bdm_regno, registers + REGISTER_BYTE (i), 4);
}
}
/* Define the target subroutine names */
struct target_ops bdm_ppc_ops = {
"ocd", /* to_shortname */
"", /* to_longname */
"", /* to_doc */
bdm_ppc_open, /* to_open */
ocd_close, /* to_close */
NULL, /* to_attach */
ocd_detach, /* to_detach */
ocd_resume, /* to_resume */
bdm_ppc_wait, /* to_wait */
bdm_ppc_fetch_registers, /* to_fetch_registers */
bdm_ppc_store_registers, /* to_store_registers */
ocd_prepare_to_store, /* to_prepare_to_store */
ocd_xfer_memory, /* to_xfer_memory */
ocd_files_info, /* to_files_info */
memory_insert_breakpoint, /* to_insert_breakpoint */
memory_remove_breakpoint, /* to_remove_breakpoint */
NULL, /* to_terminal_init */
NULL, /* to_terminal_inferior */
NULL, /* to_terminal_ours_for_output */
NULL, /* to_terminal_ours */
NULL, /* to_terminal_info */
ocd_kill, /* to_kill */
ocd_load, /* to_load */
NULL, /* to_lookup_symbol */
ocd_create_inferior, /* to_create_inferior */
ocd_mourn, /* to_mourn_inferior */
0, /* to_can_run */
0, /* to_notice_signals */
ocd_thread_alive, /* to_thread_alive */
ocd_stop, /* to_stop */
process_stratum, /* to_stratum */
NULL, /* to_next */
1, /* to_has_all_memory */
1, /* to_has_memory */
1, /* to_has_stack */
1, /* to_has_registers */
1, /* to_has_execution */
NULL, /* sections */
NULL, /* sections_end */
OPS_MAGIC /* to_magic */
};
void
_initialize_bdm_ppc ()
{
add_target (&bdm_ppc_ops);
}
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