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>
34 struct property *next;
36 unsigned int unique_id;
39 #if defined(CONFIG_SPARC)
40 struct of_irq_controller;
49 struct property *properties;
50 struct property *deadprops; /* removed properties */
51 struct device_node *parent;
52 struct device_node *child;
53 struct device_node *sibling;
54 struct device_node *next; /* next device of same type */
55 struct device_node *allnext; /* next in list of all nodes */
56 struct proc_dir_entry *pde; /* this node's proc directory */
60 #if defined(CONFIG_SPARC)
61 char *path_component_name;
62 unsigned int unique_id;
63 struct of_irq_controller *irq_trans;
67 /* Pointer for first entry in chain of all nodes. */
68 extern struct device_node *allnodes;
70 static inline int of_node_check_flag(struct device_node *n, unsigned long flag)
72 return test_bit(flag, &n->_flags);
75 static inline void of_node_set_flag(struct device_node *n, unsigned long flag)
77 set_bit(flag, &n->_flags);
80 extern struct device_node *of_find_all_nodes(struct device_node *prev);
82 #if defined(CONFIG_SPARC)
83 /* Dummy ref counting routines - to be implemented later */
84 static inline struct device_node *of_node_get(struct device_node *node)
88 static inline void of_node_put(struct device_node *node)
93 extern struct device_node *of_node_get(struct device_node *node);
94 extern void of_node_put(struct device_node *node);
98 * OF address retreival & translation
101 /* Helper to read a big number; size is in cells (not bytes) */
102 static inline u64 of_read_number(const __be32 *cell, int size)
106 r = (r << 32) | be32_to_cpu(*(cell++));
110 /* Like of_read_number, but we want an unsigned long result */
111 static inline unsigned long of_read_ulong(const __be32 *cell, int size)
113 /* toss away upper bits if unsigned long is smaller than u64 */
114 return of_read_number(cell, size);
117 #include <asm/prom.h>
119 /* Default #address and #size cells. Allow arch asm/prom.h to override */
120 #if !defined(OF_ROOT_NODE_ADDR_CELLS_DEFAULT)
121 #define OF_ROOT_NODE_ADDR_CELLS_DEFAULT 1
122 #define OF_ROOT_NODE_SIZE_CELLS_DEFAULT 1
125 /* Default string compare functions, Allow arch asm/prom.h to override */
126 #if !defined(of_compat_cmp)
127 #define of_compat_cmp(s1, s2, l) strncasecmp((s1), (s2), (l))
128 #define of_prop_cmp(s1, s2) strcmp((s1), (s2))
129 #define of_node_cmp(s1, s2) strcasecmp((s1), (s2))
132 /* flag descriptions */
133 #define OF_DYNAMIC 1 /* node and properties were allocated via kmalloc */
134 #define OF_DETACHED 2 /* node has been detached from the device tree */
136 #define OF_IS_DYNAMIC(x) test_bit(OF_DYNAMIC, &x->_flags)
137 #define OF_MARK_DYNAMIC(x) set_bit(OF_DYNAMIC, &x->_flags)
139 #define OF_BAD_ADDR ((u64)-1)
141 extern struct device_node *of_find_node_by_name(struct device_node *from,
143 #define for_each_node_by_name(dn, name) \
144 for (dn = of_find_node_by_name(NULL, name); dn; \
145 dn = of_find_node_by_name(dn, name))
146 extern struct device_node *of_find_node_by_type(struct device_node *from,
148 #define for_each_node_by_type(dn, type) \
149 for (dn = of_find_node_by_type(NULL, type); dn; \
150 dn = of_find_node_by_type(dn, type))
151 extern struct device_node *of_find_compatible_node(struct device_node *from,
152 const char *type, const char *compat);
153 #define for_each_compatible_node(dn, type, compatible) \
154 for (dn = of_find_compatible_node(NULL, type, compatible); dn; \
155 dn = of_find_compatible_node(dn, type, compatible))
156 extern struct device_node *of_find_matching_node(struct device_node *from,
157 const struct of_device_id *matches);
158 #define for_each_matching_node(dn, matches) \
159 for (dn = of_find_matching_node(NULL, matches); dn; \
160 dn = of_find_matching_node(dn, matches))
161 extern struct device_node *of_find_node_by_path(const char *path);
162 extern struct device_node *of_find_node_by_phandle(phandle handle);
163 extern struct device_node *of_get_parent(const struct device_node *node);
164 extern struct device_node *of_get_next_parent(struct device_node *node);
165 extern struct device_node *of_get_next_child(const struct device_node *node,
166 struct device_node *prev);
167 #define for_each_child_of_node(parent, child) \
168 for (child = of_get_next_child(parent, NULL); child != NULL; \
169 child = of_get_next_child(parent, child))
171 extern struct device_node *of_find_node_with_property(
172 struct device_node *from, const char *prop_name);
173 #define for_each_node_with_property(dn, prop_name) \
174 for (dn = of_find_node_with_property(NULL, prop_name); dn; \
175 dn = of_find_node_with_property(dn, prop_name))
177 extern struct property *of_find_property(const struct device_node *np,
180 extern int of_device_is_compatible(const struct device_node *device,
182 extern int of_device_is_available(const struct device_node *device);
183 extern const void *of_get_property(const struct device_node *node,
186 extern int of_n_addr_cells(struct device_node *np);
187 extern int of_n_size_cells(struct device_node *np);
188 extern const struct of_device_id *of_match_node(
189 const struct of_device_id *matches, const struct device_node *node);
190 extern int of_modalias_node(struct device_node *node, char *modalias, int len);
191 extern struct device_node *of_parse_phandle(struct device_node *np,
192 const char *phandle_name,
194 extern int of_parse_phandles_with_args(struct device_node *np,
195 const char *list_name, const char *cells_name, int index,
196 struct device_node **out_node, const void **out_args);
198 extern int of_machine_is_compatible(const char *compat);
200 extern int prom_add_property(struct device_node* np, struct property* prop);
201 extern int prom_remove_property(struct device_node *np, struct property *prop);
202 extern int prom_update_property(struct device_node *np,
203 struct property *newprop,
204 struct property *oldprop);
206 #if defined(CONFIG_OF_DYNAMIC)
207 /* For updating the device tree at runtime */
208 extern void of_attach_node(struct device_node *);
209 extern void of_detach_node(struct device_node *);
212 #endif /* CONFIG_OF */
213 #endif /* _LINUX_OF_H */