1 files changed, 339 insertions, 0 deletions
diff --git a/sim/common/hw-ports.c b/sim/common/hw-ports.c
new file mode 100644
index 00000000000..b7dc9850926
--- /dev/null
+++ b/sim/common/hw-ports.c
@@ -0,0 +1,339 @@
+/* Hardware ports.
+   Copyright (C) 1998 Free Software Foundation, Inc.
+   Contributed by Andrew Cagney and Cygnus Solutions.
+
+This file is part of GDB, the GNU debugger.
+
+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, 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 "hw-main.h"
+#include "hw-base.h"
+
+#ifdef HAVE_STDLIB_H
+#include <stdlib.h>
+#endif
+
+#ifdef HAVE_STRING_H
+#include <string.h>
+#else
+#ifdef HAVE_STRINGS_H
+#include <strings.h>
+#endif
+#endif
+
+#include <ctype.h>
+
+#define TRACE(x,y)
+
+
+struct hw_port_edge {
+  int my_port;
+  struct hw *dest;
+  int dest_port;
+  struct hw_port_edge *next;
+  object_disposition disposition;
+};
+
+struct hw_port_data {
+  hw_port_event_method *to_port_event;
+  const struct hw_port_descriptor *ports;
+  struct hw_port_edge *edges;
+};
+
+const struct hw_port_descriptor empty_hw_ports[] = {
+  { NULL, },
+};
+
+static void
+panic_hw_port_event (struct hw *me,
+		     int my_port,
+		     struct hw *source,
+		     int source_port,
+		     int level)
+{
+  hw_abort (me, "no port method");
+}
+
+void
+create_hw_port_data (struct hw *me)
+{
+  me->ports_of_hw = HW_ZALLOC (me, struct hw_port_data);
+  set_hw_port_event (me, panic_hw_port_event);
+  set_hw_ports (me, empty_hw_ports);
+}
+
+void
+delete_hw_port_data (struct hw *me)
+{
+  hw_free (me, me->ports_of_hw);
+  me->ports_of_hw = NULL;
+}
+
+void
+set_hw_ports (struct hw *me,
+	      const struct hw_port_descriptor ports[])
+{
+  me->ports_of_hw->ports = ports;
+}
+
+void
+set_hw_port_event (struct hw *me,
+		   hw_port_event_method *port_event)
+{
+  me->ports_of_hw->to_port_event = port_event;
+}
+
+
+static void
+attach_hw_port_edge (struct hw *me,
+		     struct hw_port_edge **list,
+		     int my_port,
+		     struct hw *dest,
+		     int dest_port,
+		     object_disposition disposition)
+{
+  struct hw_port_edge *new_edge = HW_ZALLOC (me, struct hw_port_edge);
+  new_edge->my_port = my_port;
+  new_edge->dest = dest;
+  new_edge->dest_port = dest_port;
+  new_edge->next = *list;
+  new_edge->disposition = disposition;
+  *list = new_edge;
+}
+
+
+static void
+detach_hw_port_edge (struct hw *me,
+		     struct hw_port_edge **list,
+		     int my_port,
+		     struct hw *dest,
+		     int dest_port)
+{
+  while (*list != NULL)
+    {
+      struct hw_port_edge *old_edge = *list;
+      if (old_edge->dest == dest
+	  && old_edge->dest_port == dest_port
+	  && old_edge->my_port == my_port)
+	{
+	  if (old_edge->disposition == permenant_object)
+	    hw_abort (me, "attempt to delete permenant port edge");
+	  *list = old_edge->next;
+	  hw_free (me, old_edge);
+	  return;
+	}
+    }
+  hw_abort (me, "attempt to delete unattached port");
+}
+
+
+#if 0
+static void
+clean_hw_port_edges (struct hw_port_edge **list)
+{
+  while (*list != NULL)
+    {
+      struct hw_port_edge *old_edge = *list;
+      switch (old_edge->disposition)
+	{
+	case permenant_object:
+	  list = &old_edge->next;
+	  break;
+	case temporary_object:
+	  *list = old_edge->next;
+	  hw_free (me, old_edge);
+	  break;
+	}
+    }
+}
+#endif
+
+
+/* Ports: */
+
+void
+hw_port_event (struct hw *me,
+	       int my_port,
+	       int level)
+{
+  int found_an_edge = 0;
+  struct hw_port_edge *edge;
+  /* device's lines directly connected */
+  for (edge = me->ports_of_hw->edges;
+       edge != NULL;
+       edge = edge->next)
+    {
+      if (edge->my_port == my_port)
+	{
+	  edge->dest->ports_of_hw->to_port_event (edge->dest,
+						  edge->dest_port,
+						  me,
+						  my_port,
+						  level);
+	  found_an_edge = 1;
+	}
+    }
+  if (!found_an_edge)
+    hw_abort (me, "No edge for port %d", my_port);
+}
+
+
+void
+hw_port_attach (struct hw *me,
+		int my_port,
+		struct hw *dest,
+		int dest_port,
+		object_disposition disposition)
+{
+  attach_hw_port_edge (me,
+		       &me->ports_of_hw->edges,
+		       my_port,
+		       dest,
+		       dest_port,
+		       disposition);
+}
+
+
+void
+hw_port_detach (struct hw *me,
+		int my_port,
+		struct hw *dest,
+		int dest_port)
+{
+  detach_hw_port_edge (me,
+		       &me->ports_of_hw->edges,
+		       my_port,
+		       dest,
+		       dest_port);
+}
+
+
+void
+hw_port_traverse (struct hw *me,
+		  hw_port_traverse_function *handler,
+		  void *data)
+{
+  struct hw_port_edge *port_edge;
+  for (port_edge = me->ports_of_hw->edges;
+       port_edge != NULL;
+       port_edge = port_edge->next)
+    {
+      handler (me, port_edge->my_port,
+	       port_edge->dest, port_edge->dest_port,
+	       data);
+    }
+}
+
+
+int
+hw_port_decode (struct hw *me,
+		const char *port_name,
+		port_direction direction)
+{
+  if (port_name == NULL || port_name[0] == '\0')
+    return 0;
+  if (isdigit(port_name[0]))
+    {
+      return strtoul (port_name, NULL, 0);
+    }
+  else
+    {
+      const struct hw_port_descriptor *ports =
+	me->ports_of_hw->ports;
+      if (ports != NULL) 
+	{
+	  while (ports->name != NULL)
+	    {
+	      if (ports->direction == bidirect_port
+		  || ports->direction == direction)
+		{
+		  if (ports->nr_ports > 0)
+		    {
+		      int len = strlen (ports->name);
+		      if (strncmp (port_name, ports->name, len) == 0)
+			{
+			  if (port_name[len] == '\0')
+			    return ports->number;
+			  else if(isdigit (port_name[len]))
+			    {
+			      int port = (ports->number
+					  + strtoul (&port_name[len], NULL, 0));
+			      if (port >= ports->number + ports->nr_ports)
+				hw_abort (me,
+					  "Port %s out of range",
+					  port_name);
+			      return port;
+			    }
+			}
+		    }
+		  else if (strcmp (port_name, ports->name) == 0)
+		    return ports->number;
+		}
+	      ports++;
+	    }
+	}
+    }
+  hw_abort (me, "Unreconized port %s", port_name);
+  return 0;
+}
+
+
+int
+hw_port_encode (struct hw *me,
+		int port_number,
+		char *buf,
+		int sizeof_buf,
+		port_direction direction)
+{
+  const struct hw_port_descriptor *ports = NULL;
+  ports = me->ports_of_hw->ports;
+  if (ports != NULL) {
+    while (ports->name != NULL)
+      {
+	if (ports->direction == bidirect_port
+	    || ports->direction == direction)
+	  {
+	    if (ports->nr_ports > 0)
+	      {
+		if (port_number >= ports->number
+		    && port_number < ports->number + ports->nr_ports)
+		  {
+		    strcpy (buf, ports->name);
+		    sprintf (buf + strlen(buf), "%d", port_number - ports->number);
+		    if (strlen (buf) >= sizeof_buf)
+		      hw_abort (me, "hw_port_encode: buffer overflow");
+		    return strlen (buf);
+		  }
+	      }
+	    else
+	      {
+		if (ports->number == port_number)
+		  {
+		    if (strlen(ports->name) >= sizeof_buf)
+		      hw_abort (me, "hw_port_encode: buffer overflow");
+		    strcpy(buf, ports->name);
+		    return strlen(buf);
+		  }
+	      }
+	  }
+	ports++;
+      }
+  }
+  sprintf (buf, "%d", port_number);
+  if (strlen(buf) >= sizeof_buf)
+    hw_abort (me, "hw_port_encode: buffer overflow");
+  return strlen(buf);
+}