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git.ipfire.org Git - thirdparty/u-boot.git/blob - fs/ext4/dev.c
29076880bccc200efa5404ac3f23880eaedc9cfe
1 // SPDX-License-Identifier: GPL-2.0+
3 * (C) Copyright 2011 - 2012 Samsung Electronics
4 * EXT4 filesystem implementation in Uboot by
5 * Uma Shankar <uma.shankar@samsung.com>
6 * Manjunatha C Achar <a.manjunatha@samsung.com>
8 * made from existing ext2/dev.c file of Uboot
10 * esd gmbh <www.esd-electronics.com>
11 * Reinhard Arlt <reinhard.arlt@esd-electronics.com>
13 * based on code of fs/reiserfs/dev.c by
15 * (C) Copyright 2003 - 2004
16 * Sysgo AG, <www.elinos.com>, Pavel Bartusek <pba@sysgo.com>
21 * 0.1 - Newly created file for ext4fs support. Taken from
22 * fs/ext2/dev.c file in uboot.
28 #include <fs_internal.h>
30 #include <ext_common.h>
31 #include "ext4_common.h"
35 static struct blk_desc
*ext4fs_blk_desc
;
36 static disk_partition_t
*part_info
;
38 void ext4fs_set_blk_dev(struct blk_desc
*rbdd
, disk_partition_t
*info
)
40 assert(rbdd
->blksz
== (1 << rbdd
->log2blksz
));
41 ext4fs_blk_desc
= rbdd
;
42 get_fs()->dev_desc
= rbdd
;
44 part_offset
= info
->start
;
45 get_fs()->total_sect
= ((uint64_t)info
->size
* info
->blksz
) >>
46 get_fs()->dev_desc
->log2blksz
;
49 int ext4fs_devread(lbaint_t sector
, int byte_offset
, int byte_len
,
52 return fs_devread(get_fs()->dev_desc
, part_info
, sector
, byte_offset
,
56 int ext4_read_superblock(char *buffer
)
58 struct ext_filesystem
*fs
= get_fs();
59 int sect
= SUPERBLOCK_START
>> fs
->dev_desc
->log2blksz
;
60 int off
= SUPERBLOCK_START
% fs
->dev_desc
->blksz
;
62 return ext4fs_devread(sect
, off
, SUPERBLOCK_SIZE
,