Pull in preliminary versions of hw instances and handles from ../ppc

sim/common/hw-handles.c

@@ -0,0 +1,237 @@
+/*  This file is part of the program psim.
+
+    Copyright (C) 1994-1995,1997-1998, Andrew Cagney <cagney@highland.com.au>
+
+    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 "hw-main.h"
+#include "hw-base.h"
+
+
+struct hw_handle_mapping {
+  cell_word external;
+  struct hw *phandle;
+  struct hw_instance *ihandle;
+  struct hw_handle_mapping *next;
+};
+
+
+struct hw_handle_data {
+  int nr_mappings;
+  struct hw_handle_mapping *mappings;
+};
+
+void
+create_hw_handle_data (struct hw *hw)
+{
+  if (hw_parent (hw) == NULL)
+    {
+      hw->handles_of_hw = HW_ZALLOC (hw, struct hw_handle_data);
+    }
+  else
+    {
+      hw->handles_of_hw = hw_root (hw)->handles_of_hw;
+    }
+}
+
+void
+delete_hw_handle_data (struct hw *hw)
+{
+  /* NULL */
+}
+
+
+
+#if 0
+void
+hw_handle_init (struct hw *hw)
+{
+  struct hw_handle_mapping *current_map = db->mappings;
+  if (current_map != NULL)
+    {
+      db->nr_mappings = db->mappings->external;
+      /* verify that the mappings that were not removed are in
+	 sequence down to nr 1 */
+      while (current_map->next != NULL)
+	{
+	  if (current_map->external != current_map->next->external + 1)
+	    error ("hw_handle: hw_handle database possibly corrupt");
+	  current_map = current_map->next;
+	}
+      ASSERT (current_map->next == NULL);
+      if (current_map->external != 1)
+	error ("hw_handle: hw_handle database possibly corrupt");
+    }
+  else
+    {
+      db->nr_mappings = 0;
+    }
+}
+#endif
+
+
+struct hw_instance *
+hw_handle_ihandle2 (struct hw *hw,
+		    cell_word external)
+{
+  struct hw_handle_data *db = hw->handles_of_hw;
+  struct hw_handle_mapping *current_map = db->mappings;
+  while (current_map != NULL)
+    {
+      if (current_map->external == external)
+	return current_map->ihandle;
+      current_map = current_map->next;
+    }
+  return (void*)0;
+}
+
+
+struct hw *
+hw_handle_phandle2 (struct hw *hw,
+		    cell_word external)
+{
+  struct hw_handle_data *db = hw->handles_of_hw;
+  struct hw_handle_mapping *current_map = db->mappings;
+  while (current_map != NULL)
+    {
+      if (current_map->external == external)
+	return current_map->phandle;
+      current_map = current_map->next;
+    }
+  return (void*)0;
+}
+
+
+cell_word
+hw_handle_2ihandle (struct hw *hw,
+		    struct hw_instance *internal)
+{
+  struct hw_handle_data *db = hw->handles_of_hw;
+  struct hw_handle_mapping *current_map = db->mappings;
+  while (current_map != NULL)
+    {
+      if (current_map->ihandle == internal)
+	return current_map->external;
+      current_map = current_map->next;
+    }
+  return 0;
+}
+
+
+cell_word
+hw_handle_2phandle (struct hw *hw,
+		    struct hw *internal)
+{
+  struct hw_handle_data *db = hw->handles_of_hw;
+  struct hw_handle_mapping *current_map = db->mappings;
+  while (current_map != NULL)
+    {
+      if (current_map->phandle == internal)
+	return current_map->external;
+      current_map = current_map->next;
+    }
+  return 0;
+}
+
+
+void
+hw_handle_add_ihandle (struct hw *hw,
+		       struct hw_instance *internal)
+{
+  struct hw_handle_data *db = hw->handles_of_hw;
+  if (hw_handle_2ihandle (hw, internal) != NULL) 
+    {
+      hw_abort (hw, "attempting to add an ihandle already in the data base");
+    }
+  else
+    {
+      /* insert at the front making things in decending order */
+      struct hw_handle_mapping *new_map = ZALLOC (struct hw_handle_mapping);
+      new_map->next = db->mappings;
+      new_map->ihandle = internal;
+      db->nr_mappings += 1;
+      new_map->external = db->nr_mappings;
+      db->mappings = new_map;
+    }
+}
+
+
+void
+hw_handle_add_phandle (struct hw *hw,
+		       struct hw *internal)
+{
+  struct hw_handle_data *db = hw->handles_of_hw;
+  if (hw_handle_2phandle (hw, internal) != NULL) 
+    {
+      hw_abort (hw, "attempting to add a phandle already in the data base");
+    }
+  else
+    {
+      /* insert at the front making things in decending order */
+      struct hw_handle_mapping *new_map = ZALLOC (struct hw_handle_mapping);
+      new_map->next = db->mappings;
+      new_map->phandle = internal;
+      db->nr_mappings += 1;
+      new_map->external = db->nr_mappings;
+      db->mappings = new_map;
+    }
+}
+
+
+void
+hw_handle_remove_ihandle (struct hw *hw,
+			  struct hw_instance *internal)
+{
+  struct hw_handle_data *db = hw->handles_of_hw;
+  struct hw_handle_mapping **current_map = &db->mappings;
+  while (*current_map != NULL)
+    {
+      if ((*current_map)->ihandle == internal)
+	{
+	  struct hw_handle_mapping *delete = *current_map;
+	  *current_map = delete->next;
+	  zfree (delete);
+	  return;
+	}
+      current_map = &(*current_map)->next;
+    }
+  hw_abort (hw, "attempt to remove nonexistant ihandle");
+}
+
+
+void
+hw_handle_remove_phandle (struct hw *hw,
+			  struct hw *internal)
+{
+  struct hw_handle_data *db = hw->handles_of_hw;
+  struct hw_handle_mapping **current_map = &db->mappings;
+  while (*current_map != NULL)
+    {
+      if ((*current_map)->phandle == internal)
+	{
+	  struct hw_handle_mapping *delete = *current_map;
+	  *current_map = delete->next;
+	  zfree (delete);
+	  return;
+	}
+      current_map = &(*current_map)->next;
+    }
+  hw_abort (hw, "attempt to remove nonexistant phandle");
+}
+
+