[deliverable/binutils-gdb.git] / gdb / ppc-bdm.c

/* 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 */
\f
/* 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;
}
\f
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, &reglen);

  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);
    }
}
\f
/* 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);
}
Commit	Line	Data
35ce4f08 GN	1	/* Remote target communications for the Macraigor Systems BDM Wiggler
	2	talking to a Motorola PPC 505.
	3	Copyright 1996, 1997 Free 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, Boston, MA 02111-1307, USA. */
	20
	21	#include "defs.h"
	22	#include "gdbcore.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 "gdbcmd.h"
	32	#include "objfiles.h"
	33	#include "gdb-stabs.h"
	34	#include <sys/types.h>
	35	#include <signal.h>
	36	#include "serial.h"
	37	#include "ocd.h"
	38
	39	static void bdm_ppc_open PARAMS ((char *name, int from_tty));
	40
	41	static int bdm_ppc_wait PARAMS ((int pid,
	42	struct target_waitstatus *target_status));
	43
	44	static void bdm_ppc_fetch_registers PARAMS ((int regno));
	45
	46	static void bdm_ppc_store_registers PARAMS ((int regno));
	47
	48	extern struct target_ops bdm_ppc_ops; /* Forward decl */
	49	\f
	50	/* Open a connection to a remote debugger.
	51	NAME is the filename used for communication. */
	52
	53	static void
	54	bdm_ppc_open (name, from_tty)
	55	char *name;
	56	int from_tty;
	57	{
706eff3f	58	ocd_open (name, from_tty, OCD_TARGET_MOTO_PPC, &bdm_ppc_ops);
35ce4f08 GN	59	}
	60
	61	/* Wait until the remote machine stops, then return,
	62	storing status in STATUS just as `wait' would.
	63	Returns "pid" (though it's not clear what, if anything, that
	64	means in the case of this target). */
	65
	66	static int
	67	bdm_ppc_wait (pid, target_status)
	68	int pid;
	69	struct target_waitstatus *target_status;
	70	{
	71	int stop_reason;
	72
	73	target_status->kind = TARGET_WAITKIND_STOPPED;
	74
706eff3f	75	stop_reason = ocd_wait ();
35ce4f08 GN	76
	77	if (stop_reason)
	78	{
	79	target_status->value.sig = TARGET_SIGNAL_INT;
	80	return inferior_pid;
	81	}
	82
	83	target_status->value.sig = TARGET_SIGNAL_TRAP; /* XXX for now */
	84
	85	{
	86	unsigned long ecr, der;
	87
706eff3f GN	88	ecr = ocd_read_bdm_register (148); /* Read the exception cause register */
706eff3f GN	89	der = ocd_read_bdm_register (149); /* Read the debug enables register */
35ce4f08 GN	90	fprintf_unfiltered (gdb_stdout, "ecr = 0x%x, der = 0x%x\n", ecr, der);
	91	}
	92
	93	return inferior_pid;
	94	}
	95	\f
	96	static int bdm_regmap[] = {BDM_REGMAP};
	97
	98	/* Read the remote registers into regs.
	99
	100	The Wiggler uses the following codes to access the registers:
	101
	102	0 -> 1023 SPR 0 -> 1023
	103	0 - SPR 0 - MQ
	104	1 - SPR 1 - XER
	105	8 - SPR 8 - LR
	106	9 - SPR 9 - CTR (known as cnt in GDB)
	107	26 - SPR 26 - SRR0 - pc
	108	1024 -> 2047 DCR 0 -> DCR 1023 (IBM PPC 4xx only)
	109	2048 -> 2079 R0 -> R31
	110	2080 -> 2143 FP0 -> FP31 (64 bit regs)
	111	2144 CR (known as cnd in GDB)
	112	2145 FPCSR
	113	2146 MSR (known as ps in GDB)
	114	*/
	115
	116	static void
	117	bdm_ppc_fetch_registers (regno)
	118	int regno;
	119	{
	120	int i;
	121	unsigned char *regs;
	122	int first_regno, last_regno;
	123	int first_bdm_regno, last_bdm_regno;
	124	int reglen;
	125
	126	if (regno == -1)
	127	{
	128	first_regno = 0;
	129	last_regno = NUM_REGS - 1;
	130
	131	first_bdm_regno = 0;
	132	last_bdm_regno = BDM_NUM_REGS - 1;
	133	}
	134	else
	135	{
	136	first_regno = regno;
	137	last_regno = regno;
	138
	139	first_bdm_regno = bdm_regmap [regno];
	140	last_bdm_regno = bdm_regmap [regno];
	141	}
	142
	143	if (first_bdm_regno == -1)
	144	{
	145	supply_register (first_regno, NULL);
	146	return; /* Unsupported register */
	147	}
	148
706eff3f	149	regs = ocd_read_bdm_registers (first_bdm_regno, last_bdm_regno, &reglen);
35ce4f08 GN	150
	151	for (i = first_regno; i <= last_regno; i++)
	152	{
	153	int bdm_regno, regoffset;
	154
	155	bdm_regno = bdm_regmap [i];
	156	if (bdm_regno != -1)
	157	{
	158	regoffset = bdm_regno - first_bdm_regno;
	159
	160	if (regoffset >= reglen / 4)
	161	continue;
	162
	163	supply_register (i, regs + 4 * regoffset);
	164	}
	165	else
	166	supply_register (i, NULL); /* Unsupported register */
	167	}
	168	}
	169
	170	/* Store register REGNO, or all registers if REGNO == -1, from the contents
	171	of REGISTERS. FIXME: ignores errors. */
	172
	173	static void
	174	bdm_ppc_store_registers (regno)
	175	int regno;
	176	{
	177	int i;
	178	int first_regno, last_regno;
	179	int first_bdm_regno, last_bdm_regno;
	180
	181	if (regno == -1)
	182	{
	183	first_regno = 0;
	184	last_regno = NUM_REGS - 1;
	185
	186	first_bdm_regno = 0;
	187	last_bdm_regno = BDM_NUM_REGS - 1;
	188	}
	189	else
	190	{
	191	first_regno = regno;
	192	last_regno = regno;
	193
	194	first_bdm_regno = bdm_regmap [regno];
	195	last_bdm_regno = bdm_regmap [regno];
	196	}
	197
	198	if (first_bdm_regno == -1)
	199	return; /* Unsupported register */
	200
	201	for (i = first_regno; i <= last_regno; i++)
	202	{
	203	int bdm_regno;
	204
	205	bdm_regno = bdm_regmap [i];
	206
706eff3f	207	ocd_write_bdm_registers (bdm_regno, registers + REGISTER_BYTE (i), 4);
35ce4f08 GN	208	}
	209	}
	210	\f
	211	/* Define the target subroutine names */
	212
	213	struct target_ops bdm_ppc_ops = {
706eff3f	214	"ocd", /* to_shortname */
35ce4f08 GN	215	"", /* to_longname */
	216	"", /* to_doc */
	217	bdm_ppc_open, /* to_open */
706eff3f	218	ocd_close, /* to_close */
35ce4f08	219	NULL, /* to_attach */
706eff3f GN	220	ocd_detach, /* to_detach */
706eff3f GN	221	ocd_resume, /* to_resume */
35ce4f08 GN	222	bdm_ppc_wait, /* to_wait */
	223	bdm_ppc_fetch_registers, /* to_fetch_registers */
	224	bdm_ppc_store_registers, /* to_store_registers */
706eff3f GN	225	ocd_prepare_to_store, /* to_prepare_to_store */
	226	ocd_xfer_memory, /* to_xfer_memory */
	227	ocd_files_info, /* to_files_info */
35ce4f08 GN	228	memory_insert_breakpoint, /* to_insert_breakpoint */
	229	memory_remove_breakpoint, /* to_remove_breakpoint */
	230	NULL, /* to_terminal_init */
	231	NULL, /* to_terminal_inferior */
	232	NULL, /* to_terminal_ours_for_output */
	233	NULL, /* to_terminal_ours */
	234	NULL, /* to_terminal_info */
706eff3f GN	235	ocd_kill, /* to_kill */
706eff3f GN	236	ocd_load, /* to_load */
35ce4f08	237	NULL, /* to_lookup_symbol */
706eff3f GN	238	ocd_create_inferior, /* to_create_inferior */
706eff3f GN	239	ocd_mourn, /* to_mourn_inferior */
35ce4f08 GN	240	0, /* to_can_run */
35ce4f08 GN	241	0, /* to_notice_signals */
706eff3f GN	242	ocd_thread_alive, /* to_thread_alive */
706eff3f GN	243	ocd_stop, /* to_stop */
35ce4f08 GN	244	process_stratum, /* to_stratum */
	245	NULL, /* to_next */
	246	1, /* to_has_all_memory */
	247	1, /* to_has_memory */
	248	1, /* to_has_stack */
	249	1, /* to_has_registers */
	250	1, /* to_has_execution */
	251	NULL, /* sections */
	252	NULL, /* sections_end */
	253	OPS_MAGIC /* to_magic */
	254	};
	255
	256	void
	257	_initialize_bdm_ppc ()
	258	{
	259	add_target (&bdm_ppc_ops);
	260	}