scripts/dtc/libfdt/fdt.h

Source file repositories/reference/linux-study-clean/scripts/dtc/libfdt/fdt.h

File Facts

System
Linux kernel
Corpus path
scripts/dtc/libfdt/fdt.h
Extension
.h
Size
1763 bytes
Lines
67
Domain
Support Tooling And Documentation
Bucket
scripts
Inferred role
Support Tooling And Documentation: implementation source
Status
source implementation candidate

Why This File Exists

Repository support layer: documentation, build tooling, samples, user-space helper tools, generated initramfs support, licenses, and validation utilities.

Dependency Surface

Detected Declarations

Annotated Snippet

struct fdt_header {
	fdt32_t magic;			 /* magic word FDT_MAGIC */
	fdt32_t totalsize;		 /* total size of DT block */
	fdt32_t off_dt_struct;		 /* offset to structure */
	fdt32_t off_dt_strings;		 /* offset to strings */
	fdt32_t off_mem_rsvmap;		 /* offset to memory reserve map */
	fdt32_t version;		 /* format version */
	fdt32_t last_comp_version;	 /* last compatible version */

	/* version 2 fields below */
	fdt32_t boot_cpuid_phys;	 /* Which physical CPU id we're
					    booting on */
	/* version 3 fields below */
	fdt32_t size_dt_strings;	 /* size of the strings block */

	/* version 17 fields below */
	fdt32_t size_dt_struct;		 /* size of the structure block */
};

struct fdt_reserve_entry {
	fdt64_t address;
	fdt64_t size;
};

struct fdt_node_header {
	fdt32_t tag;
	char name[];
};

struct fdt_property {
	fdt32_t tag;
	fdt32_t len;
	fdt32_t nameoff;
	char data[];
};

#endif /* !__ASSEMBLER__ */

#define FDT_MAGIC	0xd00dfeed	/* 4: version, 4: total size */
#define FDT_TAGSIZE	sizeof(fdt32_t)

#define FDT_BEGIN_NODE	0x1		/* Start node: full name */
#define FDT_END_NODE	0x2		/* End node */
#define FDT_PROP	0x3		/* Property: name off,
					   size, content */
#define FDT_NOP		0x4		/* nop */
#define FDT_END		0x9

#define FDT_V1_SIZE	(7*sizeof(fdt32_t))
#define FDT_V2_SIZE	(FDT_V1_SIZE + sizeof(fdt32_t))
#define FDT_V3_SIZE	(FDT_V2_SIZE + sizeof(fdt32_t))
#define FDT_V16_SIZE	FDT_V3_SIZE
#define FDT_V17_SIZE	(FDT_V16_SIZE + sizeof(fdt32_t))

#endif /* FDT_H */

Annotation

Implementation Notes