dtb.c File Reference

#include "littleboot.h"
#include "string.h"
#include "dtb.h"

Include dependency graph for dtb.c:

Macros
#define	FDT_MAGIC   0xd00dfeed
#define	FDT_BEGIN_NODE   0x1
#define	FDT_END_NODE   0x2
#define	FDT_PROP   0x3
#define	FDT_NOP   0x4
#define	FDT_END   0x9

Functions
uint32_t	fdt32_to_cpu (uint32_t x)
uint32_t	swizzle (uint32_t from)
uint64_t	swizzle64 (uint64_t from)
uint16_t	swizzle16 (uint16_t from)
uint32_t *	find_subnode (uint32_t *node, char *strings, const char *name, uint32_t **node_out, int(*cmp)(const char *a, const char *b))
uint32_t *	skip_node (uint32_t *node, void(*callback)(uint32_t *child))
uint32_t *	dtb_find_node (const char *name)
uint32_t *	dtb_find_node_prefix (const char *name)
uint32_t *	find_node_int (const char *name, int(*comp)(const char *, const char *))
uint32_t *	node_find_property_int (uint32_t *node, char *strings, const char *property, uint32_t **out)
uint32_t *	dtb_node_find_property (uint32_t *node, const char *property)
void	LBDTBGetMemorySize (uint64_t *memaddr, size_t *physSize)
void	LBDeviceTreeInitialize (uint64_t dtb)
uint32_t	LBDTBGetTotalSize ()

Variables
uint64_t *	dtb_

Macro Definition Documentation

FDT_BEGIN_NODE

#define FDT_BEGIN_NODE   0x1

FDT_END

#define FDT_END   0x9

FDT_END_NODE

#define FDT_END_NODE   0x2

FDT_MAGIC

#define FDT_MAGIC   0xd00dfeed

FDT_NOP

#define FDT_NOP   0x4

FDT_PROP

#define FDT_PROP   0x3

Function Documentation

dtb_find_node()

uint32_t * dtb_find_node

(

const char *

name

)

dtb_find_node_prefix()

uint32_t * dtb_find_node_prefix

(

const char *

name

)

dtb_node_find_property()

uint32_t * dtb_node_find_property	(	uint32_t *	node,
		const char *	property
	)

fdt32_to_cpu()

uint32_t fdt32_to_cpu

(

uint32_t

x

)

find_node_int()

uint32_t * find_node_int	(	const char *	name,
		int(*)(const char *, const char *)	comp
	)

find_subnode()

uint32_t * find_subnode	(	uint32_t *	node,
		char *	strings,
		const char *	name,
		uint32_t **	node_out,
		int(*)(const char *a, const char *b)	cmp
	)

LBDeviceTreeInitialize()

void LBDeviceTreeInitialize

(

uint64_t

dtb

)

LBDTBGetMemorySize()

void LBDTBGetMemorySize	(	uint64_t *	memaddr,
		size_t *	physSize
	)

LBDTBGetTotalSize()

uint32_t LBDTBGetTotalSize

(

)

node_find_property_int()

uint32_t * node_find_property_int	(	uint32_t *	node,
		char *	strings,
		const char *	property,
		uint32_t **	out
	)

skip_node()

uint32_t * skip_node	(	uint32_t *	node,
		void(*)(uint32_t *child)	callback
	)

swizzle()

uint32_t swizzle

(

uint32_t

from

)

swizzle16()

uint16_t swizzle16

(

uint16_t

from

)

BSD 2-Clause License

Copyright (c) 2022-2025, Manas Kamal Choudhury All rights reserved.

Redistribution and use in source and binary forms, with or without modification, are permitted provided that the following conditions are met:

1. Redistributions of source code must retain the above copyright notice, this list of conditions and the following disclaimer.
2. Redistributions in binary form must reproduce the above copyright notice, this list of conditions and the following disclaimer in the documentation and/or other materials provided with the distribution.

THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

swizzle64()

uint64_t swizzle64

(

uint64_t

from

)

Variable Documentation

dtb_

uint64_t* dtb_

BSD 2-Clause License

Copyright (c) 2022-2025, Manas Kamal Choudhury All rights reserved.

Redistribution and use in source and binary forms, with or without modification, are permitted provided that the following conditions are met:

1. Redistributions of source code must retain the above copyright notice, this list of conditions and the following disclaimer.
2. Redistributions in binary form must reproduce the above copyright notice, this list of conditions and the following disclaimer in the documentation and/or other materials provided with the distribution.

THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.