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authorMichael Meissner <gnu@the-meissners.org>1996-12-10 16:12:48 +0000
committerMichael Meissner <gnu@the-meissners.org>1996-12-10 16:12:48 +0000
commit3fbe064171ca48e2fafad0a454f561c07aceef7a (patch)
tree202691d6e02f2d932b55f0c85055be6d696ecebe /sim/ppc/tree.h
parenta7dd20e8396ab9dd76ea22e0aed0bcda42b9bc54 (diff)
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+/* This file is part of the program psim.
+
+ Copyright (C) 1994-1996, 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.
+
+ */
+
+
+#ifndef _TREE_H_
+#define _TREE_H_
+
+#ifndef INLINE_TREE
+#define INLINE_TREE
+#endif
+
+/* Constructing the device tree:
+
+ The initial device tree populated with devices and basic properties
+ is created using the function <<device_tree_add_parsed()>>. This
+ function parses a PSIM device specification and uses it to populate
+ the tree accordingly.
+
+ This function accepts a printf style formatted string as the
+ argument that describes the entry. Any properties or interrupt
+ connections added to a device tree using this function are marked
+ as having a permenant disposition. When the tree is (re)
+ initialized they will be restored to their initial value.
+
+ */
+
+EXTERN_TREE\
+(device *) tree_parse
+(device *root,
+ const char *fmt,
+ ...) __attribute__ ((format (printf, 2, 3)));
+
+
+INLINE_TREE\
+(void) tree_usage
+(int verbose);
+
+INLINE_TREE\
+(void) tree_print
+(device *root);
+
+INLINE_TREE\
+(device_instance*) tree_instance
+(device *root,
+ const char *device_specifier);
+
+
+/* Tree traversal::
+
+ The entire device tree can be traversed using the
+ <<device_tree_traverse()>> function. The traversal can be in
+ either pre- or postfix order.
+
+ */
+
+typedef void (tree_traverse_function)
+ (device *device,
+ void *data);
+
+INLINE_DEVICE\
+(void) tree_traverse
+(device *root,
+ tree_traverse_function *prefix,
+ tree_traverse_function *postfix,
+ void *data);
+
+
+/* Tree lookup::
+
+ The function <<tree_find_device()>> will attempt to locate
+ the specified device within the tree. If the device is not found a
+ NULL device is returned.
+
+ */
+
+INLINE_TREE\
+(device *) tree_find_device
+(device *root,
+ const char *path);
+
+
+INLINE_TREE\
+(const device_property *) tree_find_property
+(device *root,
+ const char *path_to_property);
+
+INLINE_TREE\
+(int) tree_find_boolean_property
+(device *root,
+ const char *path_to_property);
+
+INLINE_TREE\
+(signed_cell) tree_find_integer_property
+(device *root,
+ const char *path_to_property);
+
+INLINE_TREE\
+(device_instance *) tree_find_ihandle_property
+(device *root,
+ const char *path_to_property);
+
+INLINE_TREE\
+(const char *) tree_find_string_property
+(device *root,
+ const char *path_to_property);
+
+
+/* Initializing the created tree:
+
+ Once a device tree has been created the <<device_tree_init()>>
+ function is used to initialize it. The exact sequence of events
+ that occure during initialization are described separatly.
+
+ */
+
+INLINE_TREE\
+(void) tree_init
+(device *root,
+ psim *system);
+
+
+#endif /* _TREE_H_ */