| 1 | /*
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| 2 | * Copyright (c) 2006 Jakub Jermar
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| 3 | * All rights reserved.
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| 4 | *
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| 5 | * Redistribution and use in source and binary forms, with or without
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| 6 | * modification, are permitted provided that the following conditions
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| 7 | * are met:
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| 8 | *
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| 9 | * - Redistributions of source code must retain the above copyright
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| 10 | * notice, this list of conditions and the following disclaimer.
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| 11 | * - Redistributions in binary form must reproduce the above copyright
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| 12 | * notice, this list of conditions and the following disclaimer in the
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| 13 | * documentation and/or other materials provided with the distribution.
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| 14 | * - The name of the author may not be used to endorse or promote products
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| 15 | * derived from this software without specific prior written permission.
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| 16 | *
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| 17 | * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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| 18 | * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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| 19 | * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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| 20 | * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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| 21 | * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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| 22 | * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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| 23 | * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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| 24 | * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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| 25 | * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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| 26 | * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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| 27 | */
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| 28 |
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| 29 | #ifndef KERN_OFW_TREE_H_
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| 30 | #define KERN_OFW_TREE_H_
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| 31 |
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| 32 | #include <typedefs.h>
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| 33 |
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| 34 | #define OFW_TREE_PROPERTY_MAX_NAMELEN 32
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| 35 |
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| 36 | typedef uint32_t phandle;
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| 37 |
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| 38 | /** Memory representation of OpenFirmware device tree node property. */
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| 39 | typedef struct {
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| 40 | char name[OFW_TREE_PROPERTY_MAX_NAMELEN];
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| 41 | size_t size;
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| 42 | void *value;
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| 43 | } ofw_tree_property_t;
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| 44 |
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| 45 | /** Memory representation of OpenFirmware device tree node. */
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| 46 | typedef struct ofw_tree_node {
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| 47 | struct ofw_tree_node *parent;
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| 48 | struct ofw_tree_node *peer;
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| 49 | struct ofw_tree_node *child;
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| 50 |
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| 51 | phandle node_handle; /**< Old OpenFirmware node handle. */
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| 52 |
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| 53 | char *da_name; /**< Disambigued name. */
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| 54 |
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| 55 | size_t properties; /**< Number of properties. */
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| 56 | ofw_tree_property_t *property;
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| 57 |
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| 58 | /**
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| 59 | * Pointer to a structure representing respective device.
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| 60 | * Its semantics is device dependent.
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| 61 | */
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| 62 | void *device;
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| 63 | } ofw_tree_node_t;
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| 64 |
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| 65 | /* Walker for visiting OpenFirmware device tree nodes. */
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| 66 | typedef bool (* ofw_tree_walker_t)(ofw_tree_node_t *, void *);
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| 67 |
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| 68 | extern void ofw_tree_init(ofw_tree_node_t *);
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| 69 | extern void ofw_tree_print(void);
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| 70 |
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| 71 | extern const char *ofw_tree_node_name(const ofw_tree_node_t *);
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| 72 | extern ofw_tree_node_t *ofw_tree_lookup(const char *);
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| 73 | extern ofw_tree_property_t *ofw_tree_getprop(const ofw_tree_node_t *,
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| 74 | const char *);
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| 75 | extern void ofw_tree_walk_by_device_type(const char *, ofw_tree_walker_t,
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| 76 | void *);
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| 77 |
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| 78 | extern ofw_tree_node_t *ofw_tree_find_child(ofw_tree_node_t *, const char *);
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| 79 | extern ofw_tree_node_t *ofw_tree_find_child_by_device_type(ofw_tree_node_t *,
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| 80 | const char *);
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| 81 |
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| 82 | extern ofw_tree_node_t *ofw_tree_find_peer_by_device_type(ofw_tree_node_t *,
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| 83 | const char *);
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| 84 | extern ofw_tree_node_t *ofw_tree_find_peer_by_name(ofw_tree_node_t *,
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| 85 | const char *);
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| 86 | extern ofw_tree_node_t *ofw_tree_find_node_by_handle(ofw_tree_node_t *,
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| 87 | phandle);
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| 88 |
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| 89 | #endif
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