1 files changed, 285 insertions, 0 deletions
diff --git a/sim/common/hw-instances.c b/sim/common/hw-instances.c
new file mode 100644
index 00000000000..613f8198e54
--- /dev/null
+++ b/sim/common/hw-instances.c
@@ -0,0 +1,285 @@
+/*  This file is part of the program psim.
+
+    Copyright (C) 1994-1998, 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"
+
+#include "sim-assert.h"
+
+struct hw_instance_data {
+  hw_finish_instance_method *to_finish;
+  struct hw_instance *instances;
+};
+
+static hw_finish_instance_method abort_hw_finish_instance;
+
+void
+create_hw_instance_data (struct hw *me)
+{
+  me->instances_of_hw = HW_ZALLOC (me, struct hw_instance_data);
+  set_hw_finish_instance (me, abort_hw_finish_instance);
+}
+
+void
+delete_hw_instance_data (struct hw *me)
+{
+  /* NOP */
+}
+
+
+static void
+abort_hw_finish_instance (struct hw *hw,
+			  struct hw_instance *instance)
+{
+  hw_abort (hw, "no instance finish method");
+}
+
+void
+set_hw_finish_instance (struct hw *me,
+			hw_finish_instance_method *finish)
+{
+  me->instances_of_hw->to_finish = finish;
+}
+
+
+#if 0
+void
+clean_hw_instances (struct hw *me)
+{
+  struct hw_instance **instance = &me->instances;
+  while (*instance != NULL)
+    {
+      struct hw_instance *old_instance = *instance;
+      hw_instance_delete (old_instance);
+      instance = &me->instances;
+    }
+}
+#endif
+
+
+void
+hw_instance_delete (struct hw_instance *instance)
+{
+#if 1
+  hw_abort (hw_instance_hw (instance), "not implemented");
+#else
+  struct hw *me = hw_instance_hw (instance);
+  if (instance->to_instance_delete == NULL)
+    hw_abort (me, "no delete method");
+  instance->method->delete(instance);
+  if (instance->args != NULL)
+    zfree (instance->args);
+  if (instance->path != NULL)
+    zfree (instance->path);
+  if (instance->child == NULL)
+    {
+      /* only remove leaf nodes */
+      struct hw_instance **curr = &me->instances;
+      while (*curr != instance)
+	{
+	  ASSERT (*curr != NULL);
+	  curr = &(*curr)->next;
+	}
+      *curr = instance->next;
+    }
+  else
+    {
+      /* check it isn't in the instance list */
+      struct hw_instance *curr = me->instances;
+      while (curr != NULL)
+	{
+	  ASSERT(curr != instance);
+	  curr = curr->next;
+	}
+      /* unlink the child */
+      ASSERT (instance->child->parent == instance);
+      instance->child->parent = NULL;
+    }
+  cap_remove (me->ihandles, instance);
+  zfree (instance);
+#endif
+}
+
+
+static int
+panic_hw_instance_read (struct hw_instance *instance,
+			void *addr,
+			unsigned_word len)
+{
+  hw_abort (hw_instance_hw (instance), "no read method");
+  return -1;
+}
+
+
+
+static int
+panic_hw_instance_write (struct hw_instance *instance,
+			 const void *addr,
+			 unsigned_word len)
+{
+  hw_abort (hw_instance_hw (instance), "no write method");
+  return -1;
+}
+
+
+static int
+panic_hw_instance_seek (struct hw_instance *instance,
+			unsigned_word pos_hi,
+			unsigned_word pos_lo)
+{
+  hw_abort (hw_instance_hw (instance), "no seek method");
+  return -1;
+}
+
+
+int
+hw_instance_call_method (struct hw_instance *instance,
+			 const char *method_name,
+			 int n_stack_args,
+			 unsigned_cell stack_args[/*n_stack_args*/],	
+			 int n_stack_returns,
+			 unsigned_cell stack_returns[/*n_stack_args*/])
+{
+#if 1
+  hw_abort (hw_instance_hw (instance), "not implemented");
+  return -1;
+#else
+  struct hw *me = instance->owner;
+  const hw_instance_methods *method = instance->method->methods;
+  if (method == NULL)
+    {
+      hw_abort (me, "no methods (want %s)", method_name);
+    }
+  while (method->name != NULL)
+    {
+      if (strcmp(method->name, method_name) == 0)
+	{
+	  return method->method (instance,
+				 n_stack_args, stack_args,
+				 n_stack_returns, stack_returns);
+	}
+      method++;
+    }
+  hw_abort (me, "no %s method", method_name);
+  return 0;
+#endif
+}
+
+
+#define set_hw_instance_read(instance, method)\
+((instance)->to_instance_read = (method))
+
+#define set_hw_instance_write(instance, method)\
+((instance)->to_instance_write = (method))
+
+#define set_hw_instance_seek(instance, method)\
+((instance)->to_instance_seek = (method))
+
+
+#if 0
+static void
+set_hw_instance_finish (struct hw *me,
+			hw_instance_finish_method *method)
+{
+  if (me->instances_of_hw == NULL)
+    me->instances_of_hw = HW_ZALLOC (me, struct hw_instance_data);
+  me->instances_of_hw->to_finish = method;
+}
+#endif
+
+
+struct hw_instance *
+hw_instance_create (struct hw *me,
+		    struct hw_instance *parent,
+		    const char *path,
+		    const char *args)
+{
+  struct hw_instance *instance = ZALLOC (struct hw_instance);
+  /*instance->unit*/
+  /* link this instance into the devices list */
+  instance->hw_of_instance = me;
+  instance->parent_of_instance = NULL;
+  /* link this instance into the front of the devices instance list */
+  instance->sibling_of_instance = me->instances_of_hw->instances;
+  me->instances_of_hw->instances = instance;
+  if (parent != NULL)
+    {
+      ASSERT (parent->child_of_instance == NULL);
+      parent->child_of_instance = instance;
+      instance->parent_of_instance = parent;
+    }
+  instance->args_of_instance = hw_strdup (me, args);
+  instance->path_of_instance = hw_strdup (me, path);
+  set_hw_instance_read (instance, panic_hw_instance_read);
+  set_hw_instance_write (instance, panic_hw_instance_write);
+  set_hw_instance_seek (instance, panic_hw_instance_seek);
+  hw_handle_add_ihandle (me, instance);
+  me->instances_of_hw->to_finish (me, instance);
+  return instance;
+}
+
+
+struct hw_instance *
+hw_instance_interceed (struct hw_instance *parent,
+		       const char *path,
+		       const char *args)
+{
+#if 1
+  return NULL;
+#else
+  struct hw_instance *instance = ZALLOC (struct hw_instance);
+  /*instance->unit*/
+  /* link this instance into the devices list */
+  if (me != NULL)
+    {
+      ASSERT (parent == NULL);
+      instance->hw_of_instance = me;
+      instance->parent_of_instance = NULL;
+      /* link this instance into the front of the devices instance list */
+      instance->sibling_of_instance = me->instances_of_hw->instances;
+      me->instances_of_hw->instances = instance;
+    }
+  if (parent != NULL)
+    {
+      struct hw_instance **previous;
+      ASSERT (parent->child_of_instance == NULL);
+      parent->child_of_instance = instance;
+      instance->owner = parent->owner;
+      instance->parent_of_instance = parent;
+      /* in the devices instance list replace the parent instance with
+	 this one */
+      instance->next = parent->next;
+      /* replace parent with this new node */
+      previous = &instance->owner->instances;
+      while (*previous != parent)
+	{
+	  ASSERT (*previous != NULL);
+	  previous = &(*previous)->next;
+	}
+      *previous = instance;
+    }
+  instance->data = data;
+  instance->args = (args == NULL ? NULL : (char *) strdup(args));
+  instance->path = (path == NULL ? NULL : (char *) strdup(path));
+  cap_add (instance->owner->ihandles, instance);
+  return instance;
+#endif
+}