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12#ifndef _LINUX_OF_FDT_H
13#define _LINUX_OF_FDT_H
14
15#include <linux/types.h>
16#include <linux/init.h>
17
18
19#define OF_DT_HEADER 0xd00dfeed
20#define OF_DT_BEGIN_NODE 0x1
21#define OF_DT_END_NODE 0x2
22#define OF_DT_PROP 0x3
23
24#define OF_DT_NOP 0x4
25#define OF_DT_END 0x9
26
27#define OF_DT_VERSION 0x10
28
29#ifndef __ASSEMBLY__
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43
44struct boot_param_header {
45 __be32 magic;
46 __be32 totalsize;
47 __be32 off_dt_struct;
48 __be32 off_dt_strings;
49 __be32 off_mem_rsvmap;
50 __be32 version;
51 __be32 last_comp_version;
52
53 __be32 boot_cpuid_phys;
54
55 __be32 dt_strings_size;
56
57 __be32 dt_struct_size;
58};
59
60#if defined(CONFIG_OF_FLATTREE)
61
62struct device_node;
63
64
65extern char *of_fdt_get_string(struct boot_param_header *blob, u32 offset);
66extern void *of_fdt_get_property(struct boot_param_header *blob,
67 unsigned long node,
68 const char *name,
69 unsigned long *size);
70extern int of_fdt_is_compatible(struct boot_param_header *blob,
71 unsigned long node,
72 const char *compat);
73extern int of_fdt_match(struct boot_param_header *blob, unsigned long node,
74 const char *const *compat);
75extern void of_fdt_unflatten_tree(unsigned long *blob,
76 struct device_node **mynodes);
77
78
79extern int __initdata dt_root_addr_cells;
80extern int __initdata dt_root_size_cells;
81extern struct boot_param_header *initial_boot_params;
82
83
84extern char *find_flat_dt_string(u32 offset);
85extern int of_scan_flat_dt(int (*it)(unsigned long node, const char *uname,
86 int depth, void *data),
87 void *data);
88extern void *of_get_flat_dt_prop(unsigned long node, const char *name,
89 unsigned long *size);
90extern int of_flat_dt_is_compatible(unsigned long node, const char *name);
91extern int of_flat_dt_match(unsigned long node, const char *const *matches);
92extern unsigned long of_get_flat_dt_root(void);
93
94extern int early_init_dt_scan_chosen(unsigned long node, const char *uname,
95 int depth, void *data);
96extern void early_init_dt_check_for_initrd(unsigned long node);
97extern int early_init_dt_scan_memory(unsigned long node, const char *uname,
98 int depth, void *data);
99extern void early_init_dt_add_memory_arch(u64 base, u64 size);
100extern void * early_init_dt_alloc_memory_arch(u64 size, u64 align);
101extern u64 dt_mem_next_cell(int s, __be32 **cellp);
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108#ifdef CONFIG_BLK_DEV_INITRD
109extern void early_init_dt_setup_initrd_arch(unsigned long start,
110 unsigned long end);
111#endif
112
113
114extern int early_init_dt_scan_root(unsigned long node, const char *uname,
115 int depth, void *data);
116
117
118extern void unflatten_device_tree(void);
119extern void early_init_devtree(void *);
120#else
121static inline void unflatten_device_tree(void) {}
122#endif
123
124#endif
125#endif
126