4 * Definitions for talking to the Open Firmware PROM on
5 * Power Macintosh and other computers.
7 * Copyright (C) 1996-2005 Paul Mackerras.
9 * Updates for PPC64 by Peter Bergner & David Engebretsen, IBM Corp.
10 * Updates for SPARC64 by David S. Miller
11 * Derived from PowerPC and Sparc prom.h files by Stephen Rothwell, IBM Corp.
13 * This program is free software; you can redistribute it and/or
14 * modify it under the terms of the GNU General Public License
15 * as published by the Free Software Foundation; either version
16 * 2 of the License, or (at your option) any later version.
18 #include <linux/types.h>
19 #include <linux/bitops.h>
20 #include <linux/kref.h>
21 #include <linux/mod_devicetable.h>
23 #include <asm/byteorder.h>
32 struct property *next;
34 unsigned int unique_id;
37 #if defined(CONFIG_SPARC)
38 struct of_irq_controller;
47 struct property *properties;
48 struct property *deadprops; /* removed properties */
49 struct device_node *parent;
50 struct device_node *child;
51 struct device_node *sibling;
52 struct device_node *next; /* next device of same type */
53 struct device_node *allnext; /* next in list of all nodes */
54 struct proc_dir_entry *pde; /* this node's proc directory */
58 #if defined(CONFIG_SPARC)
59 char *path_component_name;
60 unsigned int unique_id;
61 struct of_irq_controller *irq_trans;
65 /* Pointer for first entry in chain of all nodes. */
66 extern struct device_node *allnodes;
68 static inline int of_node_check_flag(struct device_node *n, unsigned long flag)
70 return test_bit(flag, &n->_flags);
73 static inline void of_node_set_flag(struct device_node *n, unsigned long flag)
75 set_bit(flag, &n->_flags);
78 extern struct device_node *of_find_all_nodes(struct device_node *prev);
80 #if defined(CONFIG_SPARC)
81 /* Dummy ref counting routines - to be implemented later */
82 static inline struct device_node *of_node_get(struct device_node *node)
86 static inline void of_node_put(struct device_node *node)
91 extern struct device_node *of_node_get(struct device_node *node);
92 extern void of_node_put(struct device_node *node);
96 * OF address retreival & translation
99 /* Helper to read a big number; size is in cells (not bytes) */
100 static inline u64 of_read_number(const __be32 *cell, int size)
104 r = (r << 32) | be32_to_cpu(*(cell++));
108 /* Like of_read_number, but we want an unsigned long result */
109 static inline unsigned long of_read_ulong(const __be32 *cell, int size)
111 /* toss away upper bits if unsigned long is smaller than u64 */
112 return of_read_number(cell, size);
115 #include <asm/prom.h>
117 /* flag descriptions */
118 #define OF_DYNAMIC 1 /* node and properties were allocated via kmalloc */
119 #define OF_DETACHED 2 /* node has been detached from the device tree */
121 #define OF_IS_DYNAMIC(x) test_bit(OF_DYNAMIC, &x->_flags)
122 #define OF_MARK_DYNAMIC(x) set_bit(OF_DYNAMIC, &x->_flags)
124 #define OF_BAD_ADDR ((u64)-1)
126 extern struct device_node *of_find_node_by_name(struct device_node *from,
128 #define for_each_node_by_name(dn, name) \
129 for (dn = of_find_node_by_name(NULL, name); dn; \
130 dn = of_find_node_by_name(dn, name))
131 extern struct device_node *of_find_node_by_type(struct device_node *from,
133 #define for_each_node_by_type(dn, type) \
134 for (dn = of_find_node_by_type(NULL, type); dn; \
135 dn = of_find_node_by_type(dn, type))
136 extern struct device_node *of_find_compatible_node(struct device_node *from,
137 const char *type, const char *compat);
138 #define for_each_compatible_node(dn, type, compatible) \
139 for (dn = of_find_compatible_node(NULL, type, compatible); dn; \
140 dn = of_find_compatible_node(dn, type, compatible))
141 extern struct device_node *of_find_matching_node(struct device_node *from,
142 const struct of_device_id *matches);
143 #define for_each_matching_node(dn, matches) \
144 for (dn = of_find_matching_node(NULL, matches); dn; \
145 dn = of_find_matching_node(dn, matches))
146 extern struct device_node *of_find_node_by_path(const char *path);
147 extern struct device_node *of_find_node_by_phandle(phandle handle);
148 extern struct device_node *of_get_parent(const struct device_node *node);
149 extern struct device_node *of_get_next_parent(struct device_node *node);
150 extern struct device_node *of_get_next_child(const struct device_node *node,
151 struct device_node *prev);
152 #define for_each_child_of_node(parent, child) \
153 for (child = of_get_next_child(parent, NULL); child != NULL; \
154 child = of_get_next_child(parent, child))
156 extern struct device_node *of_find_node_with_property(
157 struct device_node *from, const char *prop_name);
158 #define for_each_node_with_property(dn, prop_name) \
159 for (dn = of_find_node_with_property(NULL, prop_name); dn; \
160 dn = of_find_node_with_property(dn, prop_name))
162 extern struct property *of_find_property(const struct device_node *np,
165 extern int of_device_is_compatible(const struct device_node *device,
167 extern int of_device_is_available(const struct device_node *device);
168 extern const void *of_get_property(const struct device_node *node,
171 extern int of_n_addr_cells(struct device_node *np);
172 extern int of_n_size_cells(struct device_node *np);
173 extern const struct of_device_id *of_match_node(
174 const struct of_device_id *matches, const struct device_node *node);
175 extern int of_modalias_node(struct device_node *node, char *modalias, int len);
176 extern struct device_node *of_parse_phandle(struct device_node *np,
177 const char *phandle_name,
179 extern int of_parse_phandles_with_args(struct device_node *np,
180 const char *list_name, const char *cells_name, int index,
181 struct device_node **out_node, const void **out_args);
183 #if defined(CONFIG_OF_DYNAMIC)
184 /* For updating the device tree at runtime */
185 extern void of_attach_node(struct device_node *);
186 extern void of_detach_node(struct device_node *);
189 #endif /* _LINUX_OF_H */