Commit | Line | Data |
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d8678b58 GL |
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 | ||
8482f568 GL |
15 | #include <linux/types.h> |
16 | #include <linux/init.h> | |
17 | ||
d8678b58 GL |
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 | |
a0817487 GL |
25 | struct device_node; |
26 | ||
9706a36e | 27 | /* For scanning an arbitrary device-tree at any time */ |
c972de14 RH |
28 | extern char *of_fdt_get_string(const void *blob, u32 offset); |
29 | extern void *of_fdt_get_property(const void *blob, | |
9706a36e SN |
30 | unsigned long node, |
31 | const char *name, | |
9d0c4dfe | 32 | int *size); |
c972de14 | 33 | extern int of_fdt_is_compatible(const void *blob, |
9706a36e SN |
34 | unsigned long node, |
35 | const char *compat); | |
cc783786 KC |
36 | extern bool of_fdt_is_big_endian(const void *blob, |
37 | unsigned long node); | |
c972de14 | 38 | extern int of_fdt_match(const void *blob, unsigned long node, |
7b482c83 | 39 | const char *const *compat); |
83262418 GS |
40 | extern void *of_fdt_unflatten_tree(const unsigned long *blob, |
41 | struct device_node *dad, | |
42 | struct device_node **mynodes); | |
9706a36e | 43 | |
e169cfbe | 44 | /* TBD: Temporary export of fdt globals - remove when code fully merged */ |
f00abd94 GL |
45 | extern int __initdata dt_root_addr_cells; |
46 | extern int __initdata dt_root_size_cells; | |
1daa0c4c | 47 | extern void *initial_boot_params; |
e169cfbe | 48 | |
ccf3356e RH |
49 | extern char __dtb_start[]; |
50 | extern char __dtb_end[]; | |
51 | ||
8482f568 | 52 | /* For scanning the flat device-tree at boot time */ |
31a6a87d GL |
53 | extern int of_scan_flat_dt(int (*it)(unsigned long node, const char *uname, |
54 | int depth, void *data), | |
55 | void *data); | |
9c609868 SZ |
56 | extern int of_get_flat_dt_subnode_by_name(unsigned long node, |
57 | const char *uname); | |
9d0c4dfe RH |
58 | extern const void *of_get_flat_dt_prop(unsigned long node, const char *name, |
59 | int *size); | |
31a6a87d | 60 | extern int of_flat_dt_is_compatible(unsigned long node, const char *name); |
7b482c83 | 61 | extern int of_flat_dt_match(unsigned long node, const char *const *matches); |
31a6a87d | 62 | extern unsigned long of_get_flat_dt_root(void); |
c0556d3f | 63 | extern int of_get_flat_dt_size(void); |
32c97689 | 64 | |
86e03221 GL |
65 | extern int early_init_dt_scan_chosen(unsigned long node, const char *uname, |
66 | int depth, void *data); | |
51975db0 GL |
67 | extern int early_init_dt_scan_memory(unsigned long node, const char *uname, |
68 | int depth, void *data); | |
e8d9d1f5 | 69 | extern void early_init_fdt_scan_reserved_mem(void); |
24bbd929 | 70 | extern void early_init_fdt_reserve_self(void); |
51975db0 | 71 | extern void early_init_dt_add_memory_arch(u64 base, u64 size); |
e8d9d1f5 MS |
72 | extern int early_init_dt_reserve_memory_arch(phys_addr_t base, phys_addr_t size, |
73 | bool no_map); | |
fe55c184 | 74 | extern void * early_init_dt_alloc_memory_arch(u64 size, u64 align); |
9d0c4dfe | 75 | extern u64 dt_mem_next_cell(int s, const __be32 **cellp); |
8482f568 | 76 | |
f00abd94 GL |
77 | /* Early flat tree scan hooks */ |
78 | extern int early_init_dt_scan_root(unsigned long node, const char *uname, | |
79 | int depth, void *data); | |
80 | ||
0288ffcb | 81 | extern bool early_init_dt_scan(void *params); |
4972a74b LA |
82 | extern bool early_init_dt_verify(void *params); |
83 | extern void early_init_dt_scan_nodes(void); | |
0288ffcb | 84 | |
6a903a25 RH |
85 | extern const char *of_flat_dt_get_machine_name(void); |
86 | extern const void *of_flat_dt_match_machine(const void *default_match, | |
87 | const void * (*get_next_compat)(const char * const**)); | |
88 | ||
82b2928c | 89 | /* Other Prototypes */ |
82b2928c | 90 | extern void unflatten_device_tree(void); |
a8bf7527 | 91 | extern void unflatten_and_copy_device_tree(void); |
82b2928c | 92 | extern void early_init_devtree(void *); |
b27652dd | 93 | extern void early_get_first_memblock_info(void *, phys_addr_t *); |
c90fe9c0 | 94 | extern u64 of_flat_dt_translate_address(unsigned long node); |
704033ce | 95 | extern void of_fdt_limit_memory(int limit); |
8bfe9b5c | 96 | #else /* CONFIG_OF_FLATTREE */ |
e8d9d1f5 | 97 | static inline void early_init_fdt_scan_reserved_mem(void) {} |
24bbd929 | 98 | static inline void early_init_fdt_reserve_self(void) {} |
6a903a25 | 99 | static inline const char *of_flat_dt_get_machine_name(void) { return NULL; } |
8bfe9b5c | 100 | static inline void unflatten_device_tree(void) {} |
a8bf7527 | 101 | static inline void unflatten_and_copy_device_tree(void) {} |
cf32eb89 | 102 | #endif /* CONFIG_OF_FLATTREE */ |
82b2928c | 103 | |
d45d94f6 | 104 | #endif /* __ASSEMBLY__ */ |
d8678b58 | 105 | #endif /* _LINUX_OF_FDT_H */ |