2003-10-16 Kei Sakamoto <sakamoto.kei@renesas.com>

	* remote-m32r-sdi.c : New file, interface to m32r on-chip
	debug interface, SDI (Scalable Debug Interface).
	* NEWS: Mention m32r SDI protocol was supported.
	* Makefile.in (remote-m32r-sdi.o): Add build rule.
	* config/m32r/m32r.mt (TDEPFILES) : Add remote-m32r-sdi.o.

5 files changed, 1690 insertions, 2 deletions

diff --git a/gdb/ChangeLog b/gdb/ChangeLog
index edaedda..4767e2b 100644
--- a/gdb/ChangeLog
+++ b/gdb/ChangeLog
@@ -1,3 +1,12 @@
+
+2003-10-16  Kei Sakamoto  <sakamoto.kei@renesas.com>
+
+	* remote-m32r-sdi.c : New file, interface to m32r on-chip
+	debug interface, SDI (Scalable Debug Interface).
+	* NEWS: Mention m32r SDI protocol was supported.
+	* Makefile.in (remote-m32r-sdi.o): Add build rule.
+	* config/m32r/m32r.mt (TDEPFILES) : Add remote-m32r-sdi.o.
+
 2003-10-15  Jeff Johnston  <jjohnstn@redhat.com>
 
 	* ia64-linux-tdep.c: Include gdbcore.h.
diff --git a/gdb/Makefile.in b/gdb/Makefile.in
index 17a7c7a..8a9e746 100644
--- a/gdb/Makefile.in
+++ b/gdb/Makefile.in
@@ -1287,7 +1287,7 @@ ALLDEPFILES = \
 	ppcnbsd-nat.o ppcnbsd-tdep.o \
 	procfs.c \
 	remote-e7000.c \
-	remote-hms.c remote-mips.c \
+	remote-hms.c remote-m32r-sdi.c remote-mips.c \
 	remote-rdp.c remote-sim.c \
 	remote-st.c remote-utils.c dcache.c \
 	remote-vx.c \
@@ -2161,6 +2161,8 @@ remote-fileio.o: remote-fileio.c $(defs_h) $(gdb_string_h) $(gdbcmd_h) \
 	$(remote_fileio_h)
 remote-hms.o: remote-hms.c $(defs_h) $(gdbcore_h) $(target_h) $(monitor_h) \
 	$(serial_h) $(regcache_h)
+remote-m32r-sdi.o: remote-m32r-sdi.c $(defs_h) $(gdbcmd_h) $(gdbcore_h) \
+	$(inferior_h) $(target_h) $(regcache_h) $(gdb_string_h) $(serial_h)
 remote-mips.o: remote-mips.c $(defs_h) $(inferior_h) $(bfd_h) $(symfile_h) \
 	$(gdbcmd_h) $(gdbcore_h) $(serial_h) $(target_h) $(remote_utils_h) \
 	$(gdb_string_h) $(gdb_stat_h) $(regcache_h)
diff --git a/gdb/NEWS b/gdb/NEWS
index d47863b..96ba000 100644
--- a/gdb/NEWS
+++ b/gdb/NEWS
@@ -3,6 +3,10 @@
 
 *** Changes since GDB 6.0:
 
+* New debugging protocols
+
+M32R with SDI protocol				m32r-*-elf*
+
 * "set prompt-escape-char" command deleted.
 
 The command "set prompt-escape-char" has been deleted.  This command,
diff --git a/gdb/config/m32r/m32r.mt b/gdb/config/m32r/m32r.mt
index 6d578c8..ff6def0 100644
--- a/gdb/config/m32r/m32r.mt
+++ b/gdb/config/m32r/m32r.mt
@@ -1,4 +1,4 @@
 # Target: Renesas m32r processor
-TDEPFILES= m32r-tdep.o monitor.o m32r-rom.o dsrec.o
+TDEPFILES= m32r-tdep.o monitor.o m32r-rom.o dsrec.o remote-m32r-sdi.o
 SIM_OBS = remote-sim.o
 SIM = ../sim/m32r/libsim.a
diff --git a/gdb/remote-m32r-sdi.c b/gdb/remote-m32r-sdi.c
new file mode 100644
index 0000000..7f0b90c
--- /dev/null
+++ b/gdb/remote-m32r-sdi.c
@@ -0,0 +1,1673 @@
+/* Remote debugging interface for M32R/SDI.
+
+   Copyright 2003 Free Software Foundation, Inc.
+
+   Contributed by Renesas Technology Co.
+   Written by Kei Sakamoto <sakamoto.kei@renesas.com>.
+
+   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 "gdbcmd.h"
+#include "gdbcore.h"
+#include "inferior.h"
+#include "target.h"
+#include "regcache.h"
+#include "gdb_string.h"
+#include <ctype.h>
+#include <signal.h>
+#include <netinet/in.h>
+#include <sys/types.h>
+#include <sys/time.h>
+#include <signal.h>
+#include <time.h>
+
+
+#include "serial.h"
+
+/* Descriptor for I/O to remote machine.  */
+
+static struct serial *sdi_desc = NULL;
+
+#define SDI_TIMEOUT 30
+
+
+#define SDIPORT 3232
+
+static char chip_name[64];
+
+static int step_mode;
+static unsigned long last_pc_addr = 0xffffffff;
+static unsigned char last_pc_addr_data[2];
+
+static int mmu_on = 0;
+
+static int use_ib_breakpoints = 1;
+
+#define MAX_BREAKPOINTS 1024
+static int max_ib_breakpoints;
+static unsigned long bp_address[MAX_BREAKPOINTS];
+static unsigned char bp_data[MAX_BREAKPOINTS][4];
+static const unsigned char ib_bp_entry_enable[] = {
+  0x00, 0x00, 0x00, 0x06
+};
+static const unsigned char ib_bp_entry_disable[] = {
+  0x00, 0x00, 0x00, 0x00
+};
+
+/* dbt -> nop */
+static const unsigned char dbt_bp_entry[] = {
+  0x10, 0xe0, 0x70, 0x00
+};
+
+#define MAX_ACCESS_BREAKS 4
+static int max_access_breaks;
+static unsigned long ab_address[MAX_ACCESS_BREAKS];
+static unsigned int ab_type[MAX_ACCESS_BREAKS];
+static unsigned int ab_size[MAX_ACCESS_BREAKS];
+static CORE_ADDR hit_watchpoint_addr = 0;
+
+static int interrupted = 0;
+
+/* Forward data declarations */
+extern struct target_ops m32r_ops;
+
+
+/* Commands */
+#define SDI_OPEN                 1
+#define SDI_CLOSE                2
+#define SDI_RELEASE              3
+#define SDI_READ_CPU_REG         4
+#define SDI_WRITE_CPU_REG        5
+#define SDI_READ_MEMORY          6
+#define SDI_WRITE_MEMORY         7
+#define SDI_EXEC_CPU             8
+#define SDI_STOP_CPU             9
+#define SDI_WAIT_FOR_READY      10
+#define SDI_GET_ATTR            11
+#define SDI_SET_ATTR            12
+#define SDI_STATUS              13
+
+/* Attributes */
+#define SDI_ATTR_NAME            1
+#define SDI_ATTR_BRK             2
+#define SDI_ATTR_ABRK            3
+#define SDI_ATTR_CACHE           4
+#define SDI_CACHE_TYPE_M32102    0
+#define SDI_CACHE_TYPE_CHAOS     1
+#define SDI_ATTR_MEM_ACCESS      5
+#define SDI_MEM_ACCESS_DEBUG_DMA 0
+#define SDI_MEM_ACCESS_MON_CODE  1
+
+/* Registers */
+#define SDI_REG_R0               0
+#define SDI_REG_R1               1
+#define SDI_REG_R2               2
+#define SDI_REG_R3               3
+#define SDI_REG_R4               4
+#define SDI_REG_R5               5
+#define SDI_REG_R6               6
+#define SDI_REG_R7               7
+#define SDI_REG_R8               8
+#define SDI_REG_R9               9
+#define SDI_REG_R10             10
+#define SDI_REG_R11             11
+#define SDI_REG_R12             12
+#define SDI_REG_FP              13
+#define SDI_REG_LR              14
+#define SDI_REG_SP              15
+#define SDI_REG_PSW             16
+#define SDI_REG_CBR             17
+#define SDI_REG_SPI             18
+#define SDI_REG_SPU             19
+#define SDI_REG_CR4             20
+#define SDI_REG_EVB             21
+#define SDI_REG_BPC             22
+#define SDI_REG_CR7             23
+#define SDI_REG_BBPSW           24
+#define SDI_REG_CR9             25
+#define SDI_REG_CR10            26
+#define SDI_REG_CR11            27
+#define SDI_REG_CR12            28
+#define SDI_REG_WR              29
+#define SDI_REG_BBPC            30
+#define SDI_REG_PBP             31
+#define SDI_REG_ACCH            32
+#define SDI_REG_ACCL            33
+#define SDI_REG_ACC1H           34
+#define SDI_REG_ACC1L           35
+
+
+/* Low level communication functions */
+
+/* Check an ack packet from the target */
+static int
+get_ack (void)
+{
+  int c;
+
+  if (!sdi_desc) 
+    return -1;
+
+  c = serial_readchar (sdi_desc, SDI_TIMEOUT);
+
+  if (c < 0)
+    return -1;
+
+  if (c != '+')		/* error */
+    return -1;
+
+  return 0;
+}
+
+/* Send data to the target and check an ack packet */
+static int
+send_data (void *buf, int len)
+{
+  int ret;
+
+  if (!sdi_desc) 
+    return -1;
+
+  if (serial_write (sdi_desc, buf, len) != 0)
+    return -1;
+
+  if (get_ack () == -1)
+    return -1;
+
+  return len;
+}
+
+/* Receive data from the target */
+static int
+recv_data (void *buf, int len)
+{
+  int total = 0;
+  int c;
+
+  if (!sdi_desc) 
+    return -1;
+
+  while (total < len)
+    {
+      c = serial_readchar (sdi_desc, SDI_TIMEOUT);
+
+      if (c < 0)
+	return -1;
+
+      ((unsigned char *) buf)[total++] = c;
+    }
+
+  return len;
+}
+
+/* Store unsigned long parameter on packet */
+static void
+store_long_parameter (void *buf, long val)
+{
+  val = htonl (val);
+  memcpy (buf, &val, 4);
+}
+
+/* Check if MMU is on */
+static void
+check_mmu_status (void)
+{
+  unsigned long val;
+  unsigned char buf[2];
+
+  /* Read PC address */
+  buf[0] = SDI_READ_CPU_REG;
+  buf[1] = SDI_REG_BPC;
+  if (send_data (buf, 2) == -1)
+    return;
+  recv_data (&val, 4);
+  val = ntohl (val);
+  if ((val & 0xc0000000) == 0x80000000)
+    {
+      mmu_on = 1;
+      return;
+    }
+
+  /* Read EVB address */
+  buf[0] = SDI_READ_CPU_REG;
+  buf[1] = SDI_REG_EVB;
+  if (send_data (buf, 2) == -1)
+    return;
+  recv_data (&val, 4);
+  val = ntohl (val);
+  if ((val & 0xc0000000) == 0x80000000)
+    {
+      mmu_on = 1;
+      return;
+    }
+
+  mmu_on = 0;
+}
+
+
+/* This is called not only when we first attach, but also when the
+   user types "run" after having attached.  */
+static void
+m32r_create_inferior (char *execfile, char *args, char **env)
+{
+  CORE_ADDR entry_pt;
+
+  if (args && *args)
+    error ("Cannot pass arguments to remote STDEBUG process");
+
+  if (execfile == 0 || exec_bfd == 0)
+    error ("No executable file specified");
+
+  if (remote_debug)
+    fprintf_unfiltered (gdb_stdlog, "m32r_create_inferior(%s,%s)\n", execfile,
+			args);
+
+  entry_pt = bfd_get_start_address (exec_bfd);
+
+  /* The "process" (board) is already stopped awaiting our commands, and
+     the program is already downloaded.  We just set its PC and go.  */
+
+  clear_proceed_status ();
+
+  /* Tell wait_for_inferior that we've started a new process.  */
+  init_wait_for_inferior ();
+
+  /* Set up the "saved terminal modes" of the inferior
+     based on what modes we are starting it with.  */
+  target_terminal_init ();
+
+  /* Install inferior's terminal modes.  */
+  target_terminal_inferior ();
+
+  proceed (entry_pt, TARGET_SIGNAL_DEFAULT, 0);
+}
+
+/* Open a connection to a remote debugger.
+   NAME is the filename used for communication.  */
+
+static void
+m32r_open (char *args, int from_tty)
+{
+  struct hostent *host_ent;
+  struct sockaddr_in server_addr;
+  char *port_str, hostname[256];
+  int port;
+  unsigned char buf[2];
+  int i, n;
+  int yes = 1;
+
+  if (remote_debug)
+    fprintf_unfiltered (gdb_stdlog, "m32r_open(%d)\n", from_tty);
+
+  target_preopen (from_tty);
+
+  push_target (&m32r_ops);
+
+  if (args == NULL)
+    sprintf (hostname, "localhost:%d", SDIPORT);
+  else
+    {
+      port_str = strchr (args, ':');
+      if (port_str == NULL)
+        sprintf (hostname, "%s:%d", args, SDIPORT);
+      else
+	strcpy (hostname, args);
+    }
+
+  sdi_desc = serial_open (hostname);
+  if (!sdi_desc)
+    error ("Connection refused\n");
+
+  if (get_ack () == -1)
+    error ("Cannot connect to SDI target\n");
+
+  buf[0] = SDI_OPEN;
+  if (send_data (buf, 1) == -1)
+    error ("Cannot connect to SDI target\n");
+
+  /* Get maximum number of ib breakpoints */
+  buf[0] = SDI_GET_ATTR;
+  buf[1] = SDI_ATTR_BRK;
+  send_data (buf, 2);
+  recv_data (buf, 1);
+  max_ib_breakpoints = buf[0];
+  if (remote_debug)
+    printf_filtered ("Max IB Breakpoints = %d\n", max_ib_breakpoints);
+
+  /* Initialize breakpoints. */
+  for (i = 0; i < MAX_BREAKPOINTS; i++)
+    bp_address[i] = 0xffffffff;
+
+  /* Get maximum number of access breaks. */
+  buf[0] = SDI_GET_ATTR;
+  buf[1] = SDI_ATTR_ABRK;
+  send_data (buf, 2);
+  recv_data (buf, 1);
+  max_access_breaks = buf[0];
+  if (remote_debug)
+    printf_filtered ("Max Access Breaks = %d\n", max_access_breaks);
+
+  /* Initialize access breask. */
+  for (i = 0; i < MAX_ACCESS_BREAKS; i++)
+    ab_address[i] = 0x00000000;
+
+  check_mmu_status ();
+
+  /* Get the name of chip on target board. */
+  buf[0] = SDI_GET_ATTR;
+  buf[1] = SDI_ATTR_NAME;
+  send_data (buf, 2);
+  recv_data (chip_name, 64);
+
+  if (from_tty)
+    printf_filtered ("Remote %s connected to %s\n", target_shortname,
+		     chip_name);
+}
+
+/* Close out all files and local state before this target loses control. */
+
+static void
+m32r_close (int quitting)
+{
+  unsigned char buf[1];
+
+  if (remote_debug)
+    fprintf_unfiltered (gdb_stdlog, "m32r_close(%d)\n", quitting);
+
+  if (sdi_desc)
+    {
+      buf[0] = SDI_CLOSE;
+      send_data (buf, 1);
+      serial_close (sdi_desc);
+      sdi_desc = NULL;
+    }
+
+  inferior_ptid = null_ptid;
+  return;
+}
+
+/* Tell the remote machine to resume.  */
+
+static void
+m32r_resume (ptid_t ptid, int step, enum target_signal sig)
+{
+  unsigned long pc_addr, bp_addr, ab_addr;
+  unsigned char buf[13];
+  int i;
+
+  if (remote_debug)
+    {
+      if (step)
+	fprintf_unfiltered (gdb_stdlog, "\nm32r_resume(step)\n");
+      else
+	fprintf_unfiltered (gdb_stdlog, "\nm32r_resume(cont)\n");
+    }
+
+  check_mmu_status ();
+
+  pc_addr = read_pc ();
+  if (remote_debug)
+    fprintf_unfiltered (gdb_stdlog, "pc <= 0x%lx\n", pc_addr);
+
+  /* At pc address there is a parallel instruction with +2 offset,
+     so we have to make it a serial instruction or avoid it. */
+  if (pc_addr == last_pc_addr)
+    {
+      /* Avoid a parallel nop. */
+      if (last_pc_addr_data[0] == 0xf0 && last_pc_addr_data[1] == 0x00)
+	{
+	  pc_addr += 2;
+	  /* Now we can forget this instruction. */
+	  last_pc_addr = 0xffffffff;
+	}
+      /* Clear a parallel bit. */
+      else
+	{
+	  buf[0] = SDI_WRITE_MEMORY;
+	  if (TARGET_BYTE_ORDER == BFD_ENDIAN_BIG)
+	    store_long_parameter (buf + 1, pc_addr);
+	  else
+	    store_long_parameter (buf + 1, pc_addr - 1);
+	  store_long_parameter (buf + 5, 1);
+	  buf[9] = last_pc_addr_data[0] & 0x7f;
+	  send_data (buf, 10);
+	}
+    }
+
+  /* Set PC. */
+  buf[0] = SDI_WRITE_CPU_REG;
+  buf[1] = SDI_REG_BPC;
+  store_long_parameter (buf + 2, pc_addr);
+  send_data (buf, 6);
+
+  /* step mode. */
+  step_mode = step;
+  if (step)
+    {
+      /* Set PBP. */
+      buf[0] = SDI_WRITE_CPU_REG;
+      buf[1] = SDI_REG_PBP;
+      store_long_parameter (buf + 2, pc_addr | 1);
+      send_data (buf, 6);
+    }
+  else
+    {
+      int ib_breakpoints;
+
+      if (use_ib_breakpoints)
+	ib_breakpoints = max_ib_breakpoints;
+      else
+	ib_breakpoints = 0;
+
+      /* Set ib breakpoints. */
+      for (i = 0; i < ib_breakpoints; i++)
+	{
+	  bp_addr = bp_address[i];
+	  if (bp_addr != 0xffffffff && bp_addr != pc_addr)
+	    {
+	      /* Set PBP. */
+	      buf[0] = SDI_WRITE_MEMORY;
+	      store_long_parameter (buf + 1, 0xffff8000 + 4 * i);
+	      store_long_parameter (buf + 5, 4);
+	      if (TARGET_BYTE_ORDER == BFD_ENDIAN_BIG)
+		{
+		  buf[9] = ib_bp_entry_enable[0];
+		  buf[10] = ib_bp_entry_enable[1];
+		  buf[11] = ib_bp_entry_enable[2];
+		  buf[12] = ib_bp_entry_enable[3];
+		}
+	      else
+		{
+		  buf[9] = ib_bp_entry_enable[3];
+		  buf[10] = ib_bp_entry_enable[2];
+		  buf[11] = ib_bp_entry_enable[1];
+		  buf[12] = ib_bp_entry_enable[0];
+		}
+	      send_data (buf, 13);
+
+	      buf[0] = SDI_WRITE_MEMORY;
+	      store_long_parameter (buf + 1, 0xffff8080 + 4 * i);
+	      store_long_parameter (buf + 5, 4);
+	      store_unsigned_integer (buf + 9, 4, bp_addr);
+	      send_data (buf, 13);
+	    }
+	}
+
+      /* Set dbt breakpoints. */
+      for (i = ib_breakpoints; i < MAX_BREAKPOINTS; i++)
+	{
+	  bp_addr = bp_address[i];
+	  if (bp_addr != 0xffffffff && bp_addr != pc_addr)
+	    {
+	      if (!mmu_on)
+		bp_addr &= 0x7fffffff;
+
+	      /* Write DBT instruction. */
+	      buf[0] = SDI_WRITE_MEMORY;
+	      if ((bp_addr & 2) == 0 && bp_addr != (pc_addr & 0xfffffffc))
+		{
+		  store_long_parameter (buf + 1, bp_addr);
+		  store_long_parameter (buf + 5, 4);
+		  if (TARGET_BYTE_ORDER == BFD_ENDIAN_BIG)
+		    {
+		      buf[9] = dbt_bp_entry[0];
+		      buf[10] = dbt_bp_entry[1];
+		      buf[11] = dbt_bp_entry[2];
+		      buf[12] = dbt_bp_entry[3];
+		    }
+		  else
+		    {
+		      buf[9] = dbt_bp_entry[3];
+		      buf[10] = dbt_bp_entry[2];
+		      buf[11] = dbt_bp_entry[1];
+		      buf[12] = dbt_bp_entry[0];
+		    }
+		  send_data (buf, 13);
+		}
+	      else
+		{
+		  if (TARGET_BYTE_ORDER == BFD_ENDIAN_BIG)
+		    store_long_parameter (buf + 1, bp_addr);
+		  else if ((bp_addr & 2) == 0)
+		    store_long_parameter (buf + 1, bp_addr + 2);
+		  else
+		    store_long_parameter (buf + 1, bp_addr - 2);
+		  store_long_parameter (buf + 5, 2);
+		  if (TARGET_BYTE_ORDER == BFD_ENDIAN_BIG)
+		    {
+		      buf[9] = dbt_bp_entry[0];
+		      buf[10] = dbt_bp_entry[1];
+		    }
+		  else
+		    {
+		      buf[9] = dbt_bp_entry[1];
+		      buf[10] = dbt_bp_entry[0];
+		    }
+		  send_data (buf, 11);
+		}
+	    }
+	}
+
+      /* Set access breaks. */
+      for (i = 0; i < max_access_breaks; i++)
+	{
+	  ab_addr = ab_address[i];
+	  if (ab_addr != 0x00000000)
+	    {
+	      /* DBC register */
+	      buf[0] = SDI_WRITE_MEMORY;
+	      store_long_parameter (buf + 1, 0xffff8100 + 4 * i);
+	      store_long_parameter (buf + 5, 4);
+	      if (TARGET_BYTE_ORDER == BFD_ENDIAN_BIG)
+		{
+		  buf[9] = 0x00;
+		  buf[10] = 0x00;
+		  buf[11] = 0x00;
+		  switch (ab_type[i])
+		    {
+		    case 0:	/* write watch */
+		      buf[12] = 0x86;
+		      break;
+		    case 1:	/* read watch */
+		      buf[12] = 0x46;
+		      break;
+		    case 2:	/* access watch */
+		      buf[12] = 0x06;
+		      break;
+		    }
+		}
+	      else
+		{
+		  switch (ab_type[i])
+		    {
+		    case 0:	/* write watch */
+		      buf[9] = 0x86;
+		      break;
+		    case 1:	/* read watch */
+		      buf[9] = 0x46;
+		      break;
+		    case 2:	/* access watch */
+		      buf[9] = 0x06;
+		      break;
+		    }
+		  buf[10] = 0x00;
+		  buf[11] = 0x00;
+		  buf[12] = 0x00;
+		}
+	      send_data (buf, 13);
+
+	      /* DBAH register */
+	      buf[0] = SDI_WRITE_MEMORY;
+	      store_long_parameter (buf + 1, 0xffff8180 + 4 * i);
+	      store_long_parameter (buf + 5, 4);
+	      store_unsigned_integer (buf + 9, 4, ab_addr);
+	      send_data (buf, 13);
+
+	      /* DBAL register */
+	      buf[0] = SDI_WRITE_MEMORY;
+	      store_long_parameter (buf + 1, 0xffff8200 + 4 * i);
+	      store_long_parameter (buf + 5, 4);
+	      store_long_parameter (buf + 9, 0xffffffff);
+	      send_data (buf, 13);
+
+	      /* DBD register */
+	      buf[0] = SDI_WRITE_MEMORY;
+	      store_long_parameter (buf + 1, 0xffff8280 + 4 * i);
+	      store_long_parameter (buf + 5, 4);
+	      store_long_parameter (buf + 9, 0x00000000);
+	      send_data (buf, 13);
+
+	      /* DBDM register */
+	      buf[0] = SDI_WRITE_MEMORY;
+	      store_long_parameter (buf + 1, 0xffff8300 + 4 * i);
+	      store_long_parameter (buf + 5, 4);
+	      store_long_parameter (buf + 9, 0x00000000);
+	      send_data (buf, 13);
+	    }
+	}
+
+      /* Unset PBP. */
+      buf[0] = SDI_WRITE_CPU_REG;
+      buf[1] = SDI_REG_PBP;
+      store_long_parameter (buf + 2, 0x00000000);
+      send_data (buf, 6);
+    }
+
+  buf[0] = SDI_EXEC_CPU;
+  send_data (buf, 1);
+
+  /* Without this, some commands which require an active target (such as kill)
+     won't work.  This variable serves (at least) double duty as both the pid
+     of the target process (if it has such), and as a flag indicating that a
+     target is active.  These functions should be split out into seperate
+     variables, especially since GDB will someday have a notion of debugging
+     several processes.  */
+  inferior_ptid = pid_to_ptid (32);
+
+  return;
+}
+
+/* Wait until the remote machine stops, then return,
+   storing status in STATUS just as `wait' would.  */
+
+static void
+gdb_cntrl_c (int signo)
+{
+  if (remote_debug)
+    fprintf_unfiltered (gdb_stdlog, "interrupt\n");
+  interrupted = 1;
+}
+
+static ptid_t
+m32r_wait (ptid_t ptid, struct target_waitstatus *status)
+{
+  static RETSIGTYPE (*prev_sigint) ();
+  unsigned long bp_addr, pc_addr;
+  long i;
+  unsigned char buf[13];
+  unsigned long val;
+  int ret, c;
+
+  if (remote_debug)
+    fprintf_unfiltered (gdb_stdlog, "m32r_wait()\n");
+
+  status->kind = TARGET_WAITKIND_EXITED;
+  status->value.sig = 0;
+
+  interrupted = 0;
+  prev_sigint = signal (SIGINT, gdb_cntrl_c);
+
+  /* Wait for ready */
+  buf[0] = SDI_WAIT_FOR_READY;
+  if (serial_write (sdi_desc, buf, 1) != 0)
+    error ("Remote connection closed");
+
+  while (1)
+    {
+      c = serial_readchar (sdi_desc, SDI_TIMEOUT);
+      if (c < 0)
+	error ("Remote connection closed");
+
+      if (c == '-')	/* error */
+	{
+	  status->kind = TARGET_WAITKIND_STOPPED;
+	  status->value.sig = TARGET_SIGNAL_HUP;
+	  return inferior_ptid;
+	}
+      else if (c == '+')	/* stopped */
+	break;
+
+      if (interrupted)
+	ret = serial_write (sdi_desc, "!", 1);	/* packet to interrupt */
+      else
+	ret = serial_write (sdi_desc, ".", 1);	/* packet to wait */
+      if (ret != 0)
+	error ("Remote connection closed");
+    }
+
+  status->kind = TARGET_WAITKIND_STOPPED;
+  if (interrupted)
+    status->value.sig = TARGET_SIGNAL_INT;
+  else
+    status->value.sig = TARGET_SIGNAL_TRAP;
+
+  interrupted = 0;
+  signal (SIGINT, prev_sigint);
+
+  check_mmu_status ();
+
+  /* Recover parallel bit. */
+  if (last_pc_addr != 0xffffffff)
+    {
+      buf[0] = SDI_WRITE_MEMORY;
+      if (TARGET_BYTE_ORDER == BFD_ENDIAN_BIG)
+	store_long_parameter (buf + 1, last_pc_addr);
+      else
+	store_long_parameter (buf + 1, last_pc_addr - 1);
+      store_long_parameter (buf + 5, 1);
+      buf[9] = last_pc_addr_data[0];
+      send_data (buf, 10);
+      last_pc_addr = 0xffffffff;
+    }
+
+  /* Breakpoints are inserted only for "next" command */
+  if (!step_mode)
+    {
+      int ib_breakpoints;
+
+      if (use_ib_breakpoints)
+	ib_breakpoints = max_ib_breakpoints;
+      else
+	ib_breakpoints = 0;
+
+      /* Set back pc by 2 if m32r is stopped with dbt. */
+      buf[0] = SDI_READ_CPU_REG;
+      buf[1] = SDI_REG_BPC;
+      send_data (buf, 2);
+      recv_data (&val, 4);
+      pc_addr = ntohl (val) - 2;
+      for (i = ib_breakpoints; i < MAX_BREAKPOINTS; i++)
+	{
+	  if (pc_addr == bp_address[i])
+	    {
+	      buf[0] = SDI_WRITE_CPU_REG;
+	      buf[1] = SDI_REG_BPC;
+	      store_long_parameter (buf + 2, pc_addr);
+	      send_data (buf, 6);
+
+	      /* If there is a parallel instruction with +2 offset at pc
+	         address, we have to take care of it later. */
+	      if ((pc_addr & 0x2) != 0)
+		{
+		  if (TARGET_BYTE_ORDER == BFD_ENDIAN_BIG)
+		    {
+		      if ((bp_data[i][2] & 0x80) != 0)
+			{
+			  last_pc_addr = pc_addr;
+			  last_pc_addr_data[0] = bp_data[i][2];
+			  last_pc_addr_data[1] = bp_data[i][3];
+			}
+		    }
+		  else
+		    {
+		      if ((bp_data[i][1] & 0x80) != 0)
+			{
+			  last_pc_addr = pc_addr;
+			  last_pc_addr_data[0] = bp_data[i][1];
+			  last_pc_addr_data[1] = bp_data[i][0];
+			}
+		    }
+		}
+	      break;
+	    }
+	}
+
+      /* Remove ib breakpoints. */
+      for (i = 0; i < ib_breakpoints; i++)
+	{
+	  if (bp_address[i] != 0xffffffff)
+	    {
+	      buf[0] = SDI_WRITE_MEMORY;
+	      store_long_parameter (buf + 1, 0xffff8000 + 4 * i);
+	      store_long_parameter (buf + 5, 4);
+	      buf[9] = ib_bp_entry_disable[0];
+	      buf[10] = ib_bp_entry_disable[1];
+	      buf[11] = ib_bp_entry_disable[2];
+	      buf[12] = ib_bp_entry_disable[3];
+	      send_data (buf, 13);
+	    }
+	}
+      /* Remove dbt breakpoints. */
+      for (i = ib_breakpoints; i < MAX_BREAKPOINTS; i++)
+	{
+	  bp_addr = bp_address[i];
+	  if (bp_addr != 0xffffffff)
+	    {
+	      if (!mmu_on)
+		bp_addr &= 0x7fffffff;
+	      buf[0] = SDI_WRITE_MEMORY;
+	      store_long_parameter (buf + 1, bp_addr & 0xfffffffc);
+	      store_long_parameter (buf + 5, 4);
+	      buf[9] = bp_data[i][0];
+	      buf[10] = bp_data[i][1];
+	      buf[11] = bp_data[i][2];
+	      buf[12] = bp_data[i][3];
+	      send_data (buf, 13);
+	    }
+	}
+
+      /* Remove access breaks. */
+      hit_watchpoint_addr = 0;
+      for (i = 0; i < max_access_breaks; i++)
+	{
+	  if (ab_address[i] != 0x00000000)
+	    {
+	      buf[0] = SDI_READ_MEMORY;
+	      store_long_parameter (buf + 1, 0xffff8100 + 4 * i);
+	      store_long_parameter (buf + 5, 4);
+	      serial_write (sdi_desc, buf, 9);
+	      c = serial_readchar (sdi_desc, SDI_TIMEOUT);
+	      if (c != '-' && recv_data (buf, 4) != -1)
+		{
+		  if (TARGET_BYTE_ORDER == BFD_ENDIAN_BIG)
+		    {
+		      if ((buf[3] & 0x1) == 0x1)
+			hit_watchpoint_addr = ab_address[i];
+		    }
+		  else
+		    {
+		      if ((buf[0] & 0x1) == 0x1)
+			hit_watchpoint_addr = ab_address[i];
+		    }
+		}
+
+	      buf[0] = SDI_WRITE_MEMORY;
+	      store_long_parameter (buf + 1, 0xffff8100 + 4 * i);
+	      store_long_parameter (buf + 5, 4);
+	      store_long_parameter (buf + 9, 0x00000000);
+	      send_data (buf, 13);
+	    }
+	}
+
+      if (remote_debug)
+	fprintf_unfiltered (gdb_stdlog, "pc => 0x%lx\n", pc_addr);
+    }
+  else
+    last_pc_addr = 0xffffffff;
+
+  return inferior_ptid;
+}
+
+/* Terminate the open connection to the remote debugger.
+   Use this when you want to detach and do something else
+   with your gdb.  */
+static void
+m32r_detach (char *args, int from_tty)
+{
+  if (remote_debug)
+    fprintf_unfiltered (gdb_stdlog, "m32r_detach(%d)\n", from_tty);
+
+  m32r_resume (inferior_ptid, 0, 0);
+
+  /* calls m32r_close to do the real work */
+  pop_target ();
+  if (from_tty)
+    fprintf_unfiltered (gdb_stdlog, "Ending remote %s debugging\n",
+			target_shortname);
+}
+
+/* Return the id of register number REGNO. */
+
+static int
+get_reg_id (int regno)
+{
+  switch (regno)
+    {
+    case 20:
+      return SDI_REG_BBPC;
+    case 21:
+      return SDI_REG_BPC;
+    case 22:
+      return SDI_REG_ACCL;
+    case 23:
+      return SDI_REG_ACCH;
+    case 24:
+      return SDI_REG_EVB;
+    }
+
+  return regno;
+}
+
+/* Read the remote registers into the block REGS.  */
+
+static void m32r_fetch_register (int);
+
+static void
+m32r_fetch_registers (void)
+{
+  int regno;
+
+  for (regno = 0; regno < NUM_REGS; regno++)
+    m32r_fetch_register (regno);
+}
+
+/* Fetch register REGNO, or all registers if REGNO is -1.
+   Returns errno value.  */
+static void
+m32r_fetch_register (int regno)
+{
+  unsigned long val, val2, regid;
+  unsigned char buf[2];
+
+  if (regno == -1)
+    m32r_fetch_registers ();
+  else
+    {
+      char buffer[MAX_REGISTER_SIZE];
+
+      regid = get_reg_id (regno);
+      buf[0] = SDI_READ_CPU_REG;
+      buf[1] = regid;
+      send_data (buf, 2);
+      recv_data (&val, 4);
+      val = ntohl (val);
+
+      if (regid == SDI_REG_PSW)
+	{
+	  buf[0] = SDI_READ_CPU_REG;
+	  buf[1] = SDI_REG_BBPSW;
+	  send_data (buf, 2);
+	  recv_data (&val2, 4);
+	  val2 = ntohl (val2);
+	  val = ((0x00c1 & val2) << 8) | ((0xc100 & val) >> 8);
+	}
+
+      if (remote_debug)
+	fprintf_unfiltered (gdb_stdlog, "m32r_fetch_register(%d,0x%08lx)\n",
+			    regno, val);
+
+      /* We got the number the register holds, but gdb expects to see a
+         value in the target byte ordering.  */
+      store_unsigned_integer (buffer, 4, val);
+      supply_register (regno, buffer);
+    }
+  return;
+}
+
+/* Store the remote registers from the contents of the block REGS.  */
+
+static void m32r_store_register (int);
+
+static void
+m32r_store_registers (void)
+{
+  int regno;
+
+  for (regno = 0; regno < NUM_REGS; regno++)
+    m32r_store_register (regno);
+
+  registers_changed ();
+}
+
+/* Store register REGNO, or all if REGNO == 0.
+   Return errno value.  */
+static void
+m32r_store_register (int regno)
+{
+  int regid;
+  ULONGEST regval, tmp;
+  unsigned char buf[6];
+
+  if (regno == -1)
+    m32r_store_registers ();
+  else
+    {
+      regcache_cooked_read_unsigned (current_regcache, regno, &regval);
+      regid = get_reg_id (regno);
+
+      if (regid == SDI_REG_PSW)
+	{
+	  unsigned long psw, bbpsw;
+
+	  buf[0] = SDI_READ_CPU_REG;
+	  buf[1] = SDI_REG_PSW;
+	  send_data (buf, 2);
+	  recv_data (&psw, 4);
+	  psw = ntohl (psw);
+
+	  buf[0] = SDI_READ_CPU_REG;
+	  buf[1] = SDI_REG_BBPSW;
+	  send_data (buf, 2);
+	  recv_data (&bbpsw, 4);
+	  bbpsw = ntohl (bbpsw);
+
+	  tmp = (0x00c1 & psw) | ((0x00c1 & regval) << 8);
+	  buf[0] = SDI_WRITE_CPU_REG;
+	  buf[1] = SDI_REG_PSW;
+	  store_long_parameter (buf + 2, tmp);
+	  send_data (buf, 6);
+
+	  tmp = (0x0030 & bbpsw) | ((0xc100 & regval) >> 8);
+	  buf[0] = SDI_WRITE_CPU_REG;
+	  buf[1] = SDI_REG_BBPSW;
+	  store_long_parameter (buf + 2, tmp);
+	  send_data (buf, 6);
+	}
+      else
+	{
+	  buf[0] = SDI_WRITE_CPU_REG;
+	  buf[1] = regid;
+	  store_long_parameter (buf + 2, regval);
+	  send_data (buf, 6);
+	}
+
+      if (remote_debug)
+	fprintf_unfiltered (gdb_stdlog, "m32r_store_register(%d,0x%08lu)\n",
+			    regno, (unsigned long) regval);
+    }
+}
+
+/* Get ready to modify the registers array.  On machines which store
+   individual registers, this doesn't need to do anything.  On machines
+   which store all the registers in one fell swoop, this makes sure
+   that registers contains all the registers from the program being
+   debugged.  */
+
+static void
+m32r_prepare_to_store (void)
+{
+  /* Do nothing, since we can store individual regs */
+  if (remote_debug)
+    fprintf_unfiltered (gdb_stdlog, "m32r_prepare_to_store()\n");
+}
+
+static void
+m32r_files_info (struct target_ops *target)
+{
+  char *file = "nothing";
+
+  if (exec_bfd)
+    {
+      file = bfd_get_filename (exec_bfd);
+      printf_filtered ("\tAttached to %s running program %s\n",
+		       chip_name, file);
+    }
+}
+
+/* Read/Write memory.  */
+static int
+m32r_xfer_memory (CORE_ADDR memaddr, char *myaddr, int len,
+		  int write,
+		  struct mem_attrib *attrib, struct target_ops *target)
+{
+  unsigned long taddr;
+  unsigned char buf[0x2000];
+  int ret, c;
+
+  taddr = memaddr;
+
+  if (!mmu_on)
+    {
+      if ((taddr & 0xa0000000) == 0x80000000)
+	taddr &= 0x7fffffff;
+    }
+
+  if (remote_debug)
+    {
+      if (write)
+	fprintf_unfiltered (gdb_stdlog, "m32r_xfer_memory(%08lx,%d,write)\n",
+			    memaddr, len);
+      else
+	fprintf_unfiltered (gdb_stdlog, "m32r_xfer_memory(%08lx,%d,read)\n",
+			    memaddr, len);
+    }
+
+  if (write)
+    {
+      buf[0] = SDI_WRITE_MEMORY;
+      store_long_parameter (buf + 1, taddr);
+      store_long_parameter (buf + 5, len);
+      if (len < 0x1000)
+	{
+	  memcpy (buf + 9, myaddr, len);
+	  ret = send_data (buf, len + 9) - 9;
+	}
+      else
+	{
+	  if (serial_write (sdi_desc, buf, 9) != 0)
+	    {
+	      if (remote_debug)
+		fprintf_unfiltered (gdb_stdlog,
+				    "m32r_xfer_memory() failed\n");
+	      return 0;
+	    }
+	  ret = send_data (myaddr, len);
+	}
+    }
+  else
+    {
+      buf[0] = SDI_READ_MEMORY;
+      store_long_parameter (buf + 1, taddr);
+      store_long_parameter (buf + 5, len);
+      if (serial_write (sdi_desc, buf, 9) != 0)
+	{
+	  if (remote_debug)
+	    fprintf_unfiltered (gdb_stdlog, "m32r_xfer_memory() failed\n");
+	  return 0;
+	}
+
+      c = serial_readchar (sdi_desc, SDI_TIMEOUT);
+      if (c < 0 || c == '-')
+	{
+	  if (remote_debug)
+	    fprintf_unfiltered (gdb_stdlog, "m32r_xfer_memory() failed\n");
+	  return 0;
+	}
+
+      ret = recv_data (myaddr, len);
+    }
+
+  if (ret <= 0)
+    {
+      if (remote_debug)
+	fprintf_unfiltered (gdb_stdlog, "m32r_xfer_memory() fails\n");
+      return 0;
+    }
+
+  return ret;
+}
+
+static void
+m32r_kill (void)
+{
+  if (remote_debug)
+    fprintf_unfiltered (gdb_stdlog, "m32r_kill()\n");
+
+  inferior_ptid = null_ptid;
+
+  return;
+}
+
+/* Clean up when a program exits.
+
+   The program actually lives on in the remote processor's RAM, and may be
+   run again without a download.  Don't leave it full of breakpoint
+   instructions.  */
+
+static void
+m32r_mourn_inferior (void)
+{
+  if (remote_debug)
+    fprintf_unfiltered (gdb_stdlog, "m32r_mourn_inferior()\n");
+
+  remove_breakpoints ();
+  generic_mourn_inferior ();
+}
+
+static int
+m32r_insert_breakpoint (CORE_ADDR addr, char *shadow)
+{
+  int ib_breakpoints;
+  unsigned char buf[13];
+  int i, c;
+
+  if (remote_debug)
+    fprintf_unfiltered (gdb_stdlog, "m32r_insert_breakpoint(%08lx,\"%s\")\n",
+			addr, shadow);
+
+  if (use_ib_breakpoints)
+    ib_breakpoints = max_ib_breakpoints;
+  else
+    ib_breakpoints = 0;
+
+  for (i = 0; i < MAX_BREAKPOINTS; i++)
+    {
+      if (bp_address[i] == 0xffffffff)
+	{
+	  bp_address[i] = addr;
+	  if (i >= ib_breakpoints)
+	    {
+	      buf[0] = SDI_READ_MEMORY;
+	      if (mmu_on)
+		store_long_parameter (buf + 1, addr & 0xfffffffc);
+	      else
+		store_long_parameter (buf + 1, addr & 0x7ffffffc);
+	      store_long_parameter (buf + 5, 4);
+	      serial_write (sdi_desc, buf, 9);
+	      c = serial_readchar (sdi_desc, SDI_TIMEOUT);
+	      if (c != '-')
+		recv_data (bp_data[i], 4);
+	    }
+	  return 0;
+	}
+    }
+
+  error ("Too many breakpoints");
+  return 1;
+}
+
+static int
+m32r_remove_breakpoint (CORE_ADDR addr, char *shadow)
+{
+  int i;
+
+  if (remote_debug)
+    fprintf_unfiltered (gdb_stdlog, "m32r_remove_breakpoint(%08lx,\"%s\")\n",
+			addr, shadow);
+
+  for (i = 0; i < MAX_BREAKPOINTS; i++)
+    {
+      if (bp_address[i] == addr)
+	{
+	  bp_address[i] = 0xffffffff;
+	  break;
+	}
+    }
+
+  return 0;
+}
+
+static void
+m32r_load (char *args, int from_tty)
+{
+  struct cleanup *old_chain;
+  asection *section;
+  bfd *pbfd;
+  bfd_vma entry;
+  char *filename;
+  int quiet;
+  int nostart;
+  time_t start_time, end_time;	/* Start and end times of download */
+  unsigned long data_count;	/* Number of bytes transferred to memory */
+  int ret;
+  static RETSIGTYPE (*prev_sigint) ();
+
+  /* for direct tcp connections, we can do a fast binary download */
+  quiet = 0;
+  nostart = 0;
+  filename = NULL;
+
+  while (*args != '\000')
+    {
+      char *arg;
+
+      while (isspace (*args))
+	args++;
+
+      arg = args;
+
+      while ((*args != '\000') && !isspace (*args))
+	args++;
+
+      if (*args != '\000')
+	*args++ = '\000';
+
+      if (*arg != '-')
+	filename = arg;
+      else if (strncmp (arg, "-quiet", strlen (arg)) == 0)
+	quiet = 1;
+      else if (strncmp (arg, "-nostart", strlen (arg)) == 0)
+	nostart = 1;
+      else
+	error ("Unknown option `%s'", arg);
+    }
+
+  if (!filename)
+    filename = get_exec_file (1);
+
+  pbfd = bfd_openr (filename, gnutarget);
+  if (pbfd == NULL)
+    {
+      perror_with_name (filename);
+      return;
+    }
+  old_chain = make_cleanup_bfd_close (pbfd);
+
+  if (!bfd_check_format (pbfd, bfd_object))
+    error ("\"%s\" is not an object file: %s", filename,
+	   bfd_errmsg (bfd_get_error ()));
+
+  start_time = time (NULL);
+  data_count = 0;
+
+  interrupted = 0;
+  prev_sigint = signal (SIGINT, gdb_cntrl_c);
+
+  for (section = pbfd->sections; section; section = section->next)
+    {
+      if (bfd_get_section_flags (pbfd, section) & SEC_LOAD)
+	{
+	  bfd_vma section_address;
+	  bfd_size_type section_size;
+	  file_ptr fptr;
+	  int n;
+
+	  section_address = bfd_section_lma (pbfd, section);
+	  section_size = bfd_get_section_size_before_reloc (section);
+
+	  if (!mmu_on)
+	    {
+	      if ((section_address & 0xa0000000) == 0x80000000)
+		section_address &= 0x7fffffff;
+	    }
+
+	  if (!quiet)
+	    printf_filtered ("[Loading section %s at 0x%lx (%d bytes)]\n",
+			     bfd_get_section_name (pbfd, section),
+			     section_address, (int) section_size);
+
+	  fptr = 0;
+
+	  data_count += section_size;
+
+	  n = 0;
+	  while (section_size > 0)
+	    {
+	      char unsigned buf[0x1000 + 9];
+	      int count;
+
+	      count = min (section_size, 0x1000);
+
+	      buf[0] = SDI_WRITE_MEMORY;
+	      store_long_parameter (buf + 1, section_address);
+	      store_long_parameter (buf + 5, count);
+
+	      bfd_get_section_contents (pbfd, section, buf + 9, fptr, count);
+	      if (send_data (buf, count + 9) <= 0)
+		error ("Error while downloading %s section.",
+		       bfd_get_section_name (pbfd, section));
+
+	      if (!quiet)
+		{
+		  printf_unfiltered (".");
+		  if (n++ > 60)
+		    {
+		      printf_unfiltered ("\n");
+		      n = 0;
+		    }
+		  gdb_flush (gdb_stdout);
+		}
+
+	      section_address += count;
+	      fptr += count;
+	      section_size -= count;
+
+	      if (interrupted)
+		break;
+	    }
+
+	  if (!quiet && !interrupted)
+	    {
+	      printf_unfiltered ("done.\n");
+	      gdb_flush (gdb_stdout);
+	    }
+	}
+
+      if (interrupted)
+	{
+	  printf_unfiltered ("Interrupted.\n");
+	  break;
+	}
+    }
+
+  interrupted = 0;
+  signal (SIGINT, prev_sigint);
+
+  end_time = time (NULL);
+
+  /* Make the PC point at the start address */
+  if (exec_bfd)
+    write_pc (bfd_get_start_address (exec_bfd));
+
+  inferior_ptid = null_ptid;	/* No process now */
+
+  /* This is necessary because many things were based on the PC at the time
+     that we attached to the monitor, which is no longer valid now that we
+     have loaded new code (and just changed the PC).  Another way to do this
+     might be to call normal_stop, except that the stack may not be valid,
+     and things would get horribly confused... */
+
+  clear_symtab_users ();
+
+  if (!nostart)
+    {
+      entry = bfd_get_start_address (pbfd);
+
+      if (!quiet)
+	printf_unfiltered ("[Starting %s at 0x%lx]\n", filename, entry);
+    }
+
+  print_transfer_performance (gdb_stdout, data_count, 0,
+			      end_time - start_time);
+
+  do_cleanups (old_chain);
+}
+
+static void
+m32r_stop (void)
+{
+  unsigned char buf[1];
+
+  if (remote_debug)
+    fprintf_unfiltered (gdb_stdlog, "m32r_stop()\n");
+
+  buf[0] = SDI_STOP_CPU;
+  send_data (buf, 1);
+
+  return;
+}
+
+
+/* Tell whether this target can support a hardware breakpoint. 
+   This implements the TARGET_CAN_USE_HARDWARE_WATCHPOINT macro.  */
+
+int
+m32r_can_use_hardware_watchpoint (void)
+{
+  return max_access_breaks;
+}
+
+/* Set a data watchpoint.  ADDR and LEN should be obvious.  TYPE is 0
+   for a write watchpoint, 1 for a read watchpoint, or 2 for a read/write
+   watchpoint. */
+
+int
+m32r_set_watchpoint (CORE_ADDR addr, int len, int type)
+{
+  int i;
+
+  if (remote_debug)
+    fprintf_unfiltered (gdb_stdlog, "m32r_set_watchpoint(%08lx,%d,%d)\n",
+			addr, len, type);
+
+  for (i = 0; i < MAX_ACCESS_BREAKS; i++)
+    {
+      if (ab_address[i] == 0x00000000)
+	{
+	  ab_address[i] = addr;
+	  ab_size[i] = len;
+	  ab_type[i] = type;
+	  return 0;
+	}
+    }
+
+  error ("Too many watchpoints");
+  return 1;
+}
+
+int
+m32r_remove_watchpoint (CORE_ADDR addr, int len, int type)
+{
+  int i;
+
+  if (remote_debug)
+    fprintf_unfiltered (gdb_stdlog, "m32r_remove_watchpoint(%08lx,%d,%d)\n",
+			addr, len, type);
+
+  for (i = 0; i < MAX_ACCESS_BREAKS; i++)
+    {
+      if (ab_address[i] == addr)
+	{
+	  ab_address[i] = 0x00000000;
+	  break;
+	}
+    }
+
+  return 0;
+}
+
+CORE_ADDR
+m32r_stopped_data_address (void)
+{
+  return hit_watchpoint_addr;
+}
+
+int
+m32r_stopped_by_watchpoint (void)
+{
+  return (hit_watchpoint_addr != 0x00000000);
+}
+
+
+static void
+sdireset_command (char *args, int from_tty)
+{
+  unsigned char buf[1];
+
+  if (remote_debug)
+    fprintf_unfiltered (gdb_stdlog, "m32r_sdireset()\n");
+
+  buf[0] = SDI_OPEN;
+  send_data (buf, 1);
+
+  inferior_ptid = null_ptid;
+}
+
+
+static void
+sdistatus_command (char *args, int from_tty)
+{
+  unsigned char buf[4096];
+  int i, c;
+
+  if (remote_debug)
+    fprintf_unfiltered (gdb_stdlog, "m32r_sdireset()\n");
+
+  if (!sdi_desc)
+    return;
+
+  buf[0] = SDI_STATUS;
+  send_data (buf, 1);
+  for (i = 0; i < 4096; i++)
+    {
+      c = serial_readchar (sdi_desc, SDI_TIMEOUT);
+      if (c < 0)
+        return;
+      buf[i] = c;
+      if (c == 0)
+        break;
+    }    
+
+  printf_filtered ("%s", buf);
+}
+
+
+static void
+debug_chaos_command (char *args, int from_tty)
+{
+  unsigned char buf[3];
+
+  buf[0] = SDI_SET_ATTR;
+  buf[1] = SDI_ATTR_CACHE;
+  buf[2] = SDI_CACHE_TYPE_CHAOS;
+  send_data (buf, 3);
+}
+
+
+static void
+use_debug_dma_command (char *args, int from_tty)
+{
+  unsigned char buf[3];
+
+  buf[0] = SDI_SET_ATTR;
+  buf[1] = SDI_ATTR_MEM_ACCESS;
+  buf[2] = SDI_MEM_ACCESS_DEBUG_DMA;
+  send_data (buf, 3);
+}
+
+static void
+use_mon_code_command (char *args, int from_tty)
+{
+  unsigned char buf[3];
+
+  buf[0] = SDI_SET_ATTR;
+  buf[1] = SDI_ATTR_MEM_ACCESS;
+  buf[2] = SDI_MEM_ACCESS_MON_CODE;
+  send_data (buf, 3);
+}
+
+
+static void
+use_ib_breakpoints_command (char *args, int from_tty)
+{
+  use_ib_breakpoints = 1;
+}
+
+static void
+use_dbt_breakpoints_command (char *args, int from_tty)
+{
+  use_ib_breakpoints = 0;
+}
+
+
+/* Define the target subroutine names */
+
+struct target_ops m32r_ops;
+
+static void
+init_m32r_ops (void)
+{
+  m32r_ops.to_shortname = "m32rsdi";
+  m32r_ops.to_longname = "Remote M32R debugging over SDI interface";
+  m32r_ops.to_doc = "Use an M32R board using SDI debugging protocol.";
+  m32r_ops.to_open = m32r_open;
+  m32r_ops.to_close = m32r_close;
+  m32r_ops.to_detach = m32r_detach;
+  m32r_ops.to_resume = m32r_resume;
+  m32r_ops.to_wait = m32r_wait;
+  m32r_ops.to_fetch_registers = m32r_fetch_register;
+  m32r_ops.to_store_registers = m32r_store_register;
+  m32r_ops.to_prepare_to_store = m32r_prepare_to_store;
+  m32r_ops.to_xfer_memory = m32r_xfer_memory;
+  m32r_ops.to_files_info = m32r_files_info;
+  m32r_ops.to_insert_breakpoint = m32r_insert_breakpoint;
+  m32r_ops.to_remove_breakpoint = m32r_remove_breakpoint;
+  m32r_ops.to_kill = m32r_kill;
+  m32r_ops.to_load = m32r_load;
+  m32r_ops.to_create_inferior = m32r_create_inferior;
+  m32r_ops.to_mourn_inferior = m32r_mourn_inferior;
+  m32r_ops.to_stop = m32r_stop;
+  m32r_ops.to_stratum = process_stratum;
+  m32r_ops.to_has_all_memory = 1;
+  m32r_ops.to_has_memory = 1;
+  m32r_ops.to_has_stack = 1;
+  m32r_ops.to_has_registers = 1;
+  m32r_ops.to_has_execution = 1;
+  m32r_ops.to_magic = OPS_MAGIC;
+};
+
+
+extern initialize_file_ftype _initialize_remote_m32r;
+
+void
+_initialize_remote_m32r (void)
+{
+  int i;
+
+  init_m32r_ops ();
+
+  /* Initialize breakpoints. */
+  for (i = 0; i < MAX_BREAKPOINTS; i++)
+    bp_address[i] = 0xffffffff;
+
+  /* Initialize access breaks. */
+  for (i = 0; i < MAX_ACCESS_BREAKS; i++)
+    ab_address[i] = 0x00000000;
+
+  add_target (&m32r_ops);
+
+  add_com ("sdireset", class_obscure, sdireset_command,
+	   "Reset SDI connection.");
+
+  add_com ("sdistatus", class_obscure, sdistatus_command,
+	   "Show status of SDI connection.");
+
+  add_com ("debug_chaos", class_obscure, debug_chaos_command,
+	   "Debug M32R/Chaos.");
+
+  add_com ("use_debug_dma", class_obscure, use_debug_dma_command,
+	   "Use debug DMA mem access.");
+  add_com ("use_mon_code", class_obscure, use_mon_code_command,
+	   "Use mon code mem access.");
+
+  add_com ("use_ib_break", class_obscure, use_ib_breakpoints_command,
+	   "Set breakpoints by IB break.");
+  add_com ("use_dbt_break", class_obscure, use_dbt_breakpoints_command,
+	   "Set breakpoints by dbt.");
+}