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9#ifndef _LINUX_OF_FDT_H
10#define _LINUX_OF_FDT_H
11
12#include <linux/types.h>
13#include <linux/init.h>
14#include <linux/errno.h>
15
16
17#define OF_DT_HEADER 0xd00dfeed
18
19#ifndef __ASSEMBLY__
20
21#if defined(CONFIG_OF_FLATTREE)
22
23struct device_node;
24
25
26extern void *of_fdt_unflatten_tree(const unsigned long *blob,
27 struct device_node *dad,
28 struct device_node **mynodes);
29
30
31extern int __initdata dt_root_addr_cells;
32extern int __initdata dt_root_size_cells;
33extern void *initial_boot_params;
34
35extern char __dtb_start[];
36extern char __dtb_end[];
37
38
39extern u64 of_flat_dt_translate_address(unsigned long node);
40extern void of_fdt_limit_memory(int limit);
41#endif
42
43#ifdef CONFIG_OF_EARLY_FLATTREE
44
45extern int of_scan_flat_dt(int (*it)(unsigned long node, const char *uname,
46 int depth, void *data),
47 void *data);
48extern 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);
53extern int of_get_flat_dt_subnode_by_name(unsigned long node,
54 const char *uname);
55extern const void *of_get_flat_dt_prop(unsigned long node, const char *name,
56 int *size);
57extern int of_flat_dt_is_compatible(unsigned long node, const char *name);
58extern unsigned long of_get_flat_dt_root(void);
59extern uint32_t of_get_flat_dt_phandle(unsigned long node);
60
61extern int early_init_dt_scan_chosen(unsigned long node, const char *uname,
62 int depth, void *data);
63extern int early_init_dt_scan_memory(unsigned long node, const char *uname,
64 int depth, void *data);
65extern int early_init_dt_scan_chosen_stdout(void);
66extern void early_init_fdt_scan_reserved_mem(void);
67extern void early_init_fdt_reserve_self(void);
68extern void __init early_init_dt_scan_chosen_arch(unsigned long node);
69extern void early_init_dt_add_memory_arch(u64 base, u64 size);
70extern u64 dt_mem_next_cell(int s, const __be32 **cellp);
71
72
73extern int early_init_dt_scan_root(unsigned long node, const char *uname,
74 int depth, void *data);
75
76extern bool early_init_dt_scan(void *params);
77extern bool early_init_dt_verify(void *params);
78extern void early_init_dt_scan_nodes(void);
79
80extern const char *of_flat_dt_get_machine_name(void);
81extern const void *of_flat_dt_match_machine(const void *default_match,
82 const void * (*get_next_compat)(const char * const**));
83
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85extern void unflatten_device_tree(void);
86extern void unflatten_and_copy_device_tree(void);
87extern void early_init_devtree(void *);
88extern void early_get_first_memblock_info(void *, phys_addr_t *);
89#else
90static inline int early_init_dt_scan_chosen_stdout(void) { return -ENODEV; }
91static inline void early_init_fdt_scan_reserved_mem(void) {}
92static inline void early_init_fdt_reserve_self(void) {}
93static inline const char *of_flat_dt_get_machine_name(void) { return NULL; }
94static inline void unflatten_device_tree(void) {}
95static inline void unflatten_and_copy_device_tree(void) {}
96#endif
97
98#endif
99#endif
100