Commit | Line | Data |
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af6074fc | 1 | /* SPDX-License-Identifier: GPL-2.0 */ |
d8678b58 GL |
2 | /* |
3 | * Definitions for working with the Flattened Device Tree data format | |
4 | * | |
5 | * Copyright 2009 Benjamin Herrenschmidt, IBM Corp | |
6 | * benh@kernel.crashing.org | |
d8678b58 GL |
7 | */ |
8 | ||
9 | #ifndef _LINUX_OF_FDT_H | |
10 | #define _LINUX_OF_FDT_H | |
11 | ||
8482f568 GL |
12 | #include <linux/types.h> |
13 | #include <linux/init.h> | |
d503187b | 14 | #include <linux/errno.h> |
8482f568 | 15 | |
d8678b58 GL |
16 | /* Definitions used by the flattened device tree */ |
17 | #define OF_DT_HEADER 0xd00dfeed /* marker */ | |
d8678b58 | 18 | |
d45d94f6 | 19 | #ifndef __ASSEMBLY__ |
d45d94f6 | 20 | |
cf32eb89 | 21 | #if defined(CONFIG_OF_FLATTREE) |
9706a36e | 22 | |
a0817487 GL |
23 | struct device_node; |
24 | ||
9706a36e | 25 | /* For scanning an arbitrary device-tree at any time */ |
83262418 GS |
26 | extern void *of_fdt_unflatten_tree(const unsigned long *blob, |
27 | struct device_node *dad, | |
28 | struct device_node **mynodes); | |
9706a36e | 29 | |
e169cfbe | 30 | /* TBD: Temporary export of fdt globals - remove when code fully merged */ |
f00abd94 GL |
31 | extern int __initdata dt_root_addr_cells; |
32 | extern int __initdata dt_root_size_cells; | |
1daa0c4c | 33 | extern void *initial_boot_params; |
e169cfbe | 34 | |
ccf3356e RH |
35 | extern char __dtb_start[]; |
36 | extern char __dtb_end[]; | |
37 | ||
f347c367 GU |
38 | /* Other Prototypes */ |
39 | extern u64 of_flat_dt_translate_address(unsigned long node); | |
40 | extern void of_fdt_limit_memory(int limit); | |
41 | #endif /* CONFIG_OF_FLATTREE */ | |
42 | ||
43 | #ifdef CONFIG_OF_EARLY_FLATTREE | |
8482f568 | 44 | /* For scanning the flat device-tree at boot time */ |
31a6a87d GL |
45 | extern int of_scan_flat_dt(int (*it)(unsigned long node, const char *uname, |
46 | int depth, void *data), | |
47 | void *data); | |
ea47dd19 NP |
48 | extern int of_scan_flat_dt_subnodes(unsigned long node, |
49 | int (*it)(unsigned long node, | |
50 | const char *uname, | |
51 | void *data), | |
52 | void *data); | |
9c609868 SZ |
53 | extern int of_get_flat_dt_subnode_by_name(unsigned long node, |
54 | const char *uname); | |
9d0c4dfe RH |
55 | extern const void *of_get_flat_dt_prop(unsigned long node, const char *name, |
56 | int *size); | |
31a6a87d GL |
57 | extern int of_flat_dt_is_compatible(unsigned long node, const char *name); |
58 | extern unsigned long of_get_flat_dt_root(void); | |
ea47dd19 | 59 | extern uint32_t of_get_flat_dt_phandle(unsigned long node); |
32c97689 | 60 | |
60f20d84 | 61 | extern int early_init_dt_scan_chosen(char *cmdline); |
1f012283 | 62 | extern int early_init_dt_scan_memory(void); |
b398123b | 63 | extern void early_init_dt_check_for_usable_mem_range(void); |
d503187b | 64 | extern int early_init_dt_scan_chosen_stdout(void); |
e8d9d1f5 | 65 | extern void early_init_fdt_scan_reserved_mem(void); |
24bbd929 | 66 | extern void early_init_fdt_reserve_self(void); |
51975db0 | 67 | extern void early_init_dt_add_memory_arch(u64 base, u64 size); |
9d0c4dfe | 68 | extern u64 dt_mem_next_cell(int s, const __be32 **cellp); |
8482f568 | 69 | |
f00abd94 | 70 | /* Early flat tree scan hooks */ |
d665881d | 71 | extern int early_init_dt_scan_root(void); |
f00abd94 | 72 | |
0288ffcb | 73 | extern bool early_init_dt_scan(void *params); |
4972a74b LA |
74 | extern bool early_init_dt_verify(void *params); |
75 | extern void early_init_dt_scan_nodes(void); | |
0288ffcb | 76 | |
6a903a25 RH |
77 | extern const char *of_flat_dt_get_machine_name(void); |
78 | extern const void *of_flat_dt_match_machine(const void *default_match, | |
79 | const void * (*get_next_compat)(const char * const**)); | |
80 | ||
82b2928c | 81 | /* Other Prototypes */ |
82b2928c | 82 | extern void unflatten_device_tree(void); |
a8bf7527 | 83 | extern void unflatten_and_copy_device_tree(void); |
82b2928c | 84 | extern void early_init_devtree(void *); |
b27652dd | 85 | extern void early_get_first_memblock_info(void *, phys_addr_t *); |
f347c367 | 86 | #else /* CONFIG_OF_EARLY_FLATTREE */ |
b398123b | 87 | static inline void early_init_dt_check_for_usable_mem_range(void) {} |
d503187b | 88 | static inline int early_init_dt_scan_chosen_stdout(void) { return -ENODEV; } |
e8d9d1f5 | 89 | static inline void early_init_fdt_scan_reserved_mem(void) {} |
24bbd929 | 90 | static inline void early_init_fdt_reserve_self(void) {} |
6a903a25 | 91 | static inline const char *of_flat_dt_get_machine_name(void) { return NULL; } |
8bfe9b5c | 92 | static inline void unflatten_device_tree(void) {} |
a8bf7527 | 93 | static inline void unflatten_and_copy_device_tree(void) {} |
f347c367 | 94 | #endif /* CONFIG_OF_EARLY_FLATTREE */ |
82b2928c | 95 | |
d45d94f6 | 96 | #endif /* __ASSEMBLY__ */ |
d8678b58 | 97 | #endif /* _LINUX_OF_FDT_H */ |