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Merge branch 'omap-for-v3.17/dt' into omap-for-v3.18/dt
[mirror_ubuntu-artful-kernel.git] / include / linux / of_fdt.h
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1/*
2 * Definitions for working with the Flattened Device Tree data format
3 *
4 * Copyright 2009 Benjamin Herrenschmidt, IBM Corp
5 * benh@kernel.crashing.org
6 *
7 * This program is free software; you can redistribute it and/or
8 * modify it under the terms of the GNU General Public License
9 * version 2 as published by the Free Software Foundation.
10 */
11
12#ifndef _LINUX_OF_FDT_H
13#define _LINUX_OF_FDT_H
14
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15#include <linux/types.h>
16#include <linux/init.h>
17
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18/* Definitions used by the flattened device tree */
19#define OF_DT_HEADER 0xd00dfeed /* marker */
d8678b58 20
d45d94f6 21#ifndef __ASSEMBLY__
d45d94f6 22
cf32eb89 23#if defined(CONFIG_OF_FLATTREE)
9706a36e 24
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25struct device_node;
26
9706a36e 27/* For scanning an arbitrary device-tree at any time */
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28extern char *of_fdt_get_string(const void *blob, u32 offset);
29extern void *of_fdt_get_property(const void *blob,
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30 unsigned long node,
31 const char *name,
9d0c4dfe 32 int *size);
c972de14 33extern int of_fdt_is_compatible(const void *blob,
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34 unsigned long node,
35 const char *compat);
c972de14 36extern int of_fdt_match(const void *blob, unsigned long node,
7b482c83 37 const char *const *compat);
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38extern void of_fdt_unflatten_tree(unsigned long *blob,
39 struct device_node **mynodes);
9706a36e 40
e169cfbe 41/* TBD: Temporary export of fdt globals - remove when code fully merged */
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42extern int __initdata dt_root_addr_cells;
43extern int __initdata dt_root_size_cells;
1daa0c4c 44extern void *initial_boot_params;
e169cfbe 45
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46extern char __dtb_start[];
47extern char __dtb_end[];
48
8482f568 49/* For scanning the flat device-tree at boot time */
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50extern int of_scan_flat_dt(int (*it)(unsigned long node, const char *uname,
51 int depth, void *data),
52 void *data);
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53extern const void *of_get_flat_dt_prop(unsigned long node, const char *name,
54 int *size);
31a6a87d 55extern int of_flat_dt_is_compatible(unsigned long node, const char *name);
7b482c83 56extern int of_flat_dt_match(unsigned long node, const char *const *matches);
31a6a87d 57extern unsigned long of_get_flat_dt_root(void);
c0556d3f 58extern int of_get_flat_dt_size(void);
32c97689 59
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60extern int early_init_dt_scan_chosen(unsigned long node, const char *uname,
61 int depth, void *data);
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62extern int early_init_dt_scan_memory(unsigned long node, const char *uname,
63 int depth, void *data);
e8d9d1f5 64extern void early_init_fdt_scan_reserved_mem(void);
51975db0 65extern void early_init_dt_add_memory_arch(u64 base, u64 size);
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66extern int early_init_dt_reserve_memory_arch(phys_addr_t base, phys_addr_t size,
67 bool no_map);
fe55c184 68extern void * early_init_dt_alloc_memory_arch(u64 size, u64 align);
9d0c4dfe 69extern u64 dt_mem_next_cell(int s, const __be32 **cellp);
8482f568 70
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71/* Early flat tree scan hooks */
72extern int early_init_dt_scan_root(unsigned long node, const char *uname,
73 int depth, void *data);
74
0288ffcb 75extern bool early_init_dt_scan(void *params);
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76extern bool early_init_dt_verify(void *params);
77extern void early_init_dt_scan_nodes(void);
0288ffcb 78
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79extern const char *of_flat_dt_get_machine_name(void);
80extern const void *of_flat_dt_match_machine(const void *default_match,
81 const void * (*get_next_compat)(const char * const**));
82
82b2928c 83/* Other Prototypes */
82b2928c 84extern void unflatten_device_tree(void);
a8bf7527 85extern void unflatten_and_copy_device_tree(void);
82b2928c 86extern void early_init_devtree(void *);
b27652dd 87extern void early_get_first_memblock_info(void *, phys_addr_t *);
e06e8b27 88extern u64 fdt_translate_address(const void *blob, int node_offset);
704033ce 89extern void of_fdt_limit_memory(int limit);
8bfe9b5c 90#else /* CONFIG_OF_FLATTREE */
e8d9d1f5 91static inline void early_init_fdt_scan_reserved_mem(void) {}
6a903a25 92static inline const char *of_flat_dt_get_machine_name(void) { return NULL; }
8bfe9b5c 93static inline void unflatten_device_tree(void) {}
a8bf7527 94static inline void unflatten_and_copy_device_tree(void) {}
cf32eb89 95#endif /* CONFIG_OF_FLATTREE */
82b2928c 96
d45d94f6 97#endif /* __ASSEMBLY__ */
d8678b58 98#endif /* _LINUX_OF_FDT_H */