Djam/u-boot
1
0
Fork 0
mirror of https://github.com/u-boot/u-boot.git synced 2025-05-08 19:11:53 +00:00
Code Issues Projects Releases Packages Wiki Activity Actions

ext4fs ls load support

Browse source 
Signed-off-by: Uma Shankar <uma.shankar@samsung.com>
Signed-off-by: Manjunatha C Achar <a.manjunatha@samsung.com>
Signed-off-by: Iqbal Shareef <iqbal.ams@samsung.com>
Signed-off-by: Hakgoo Lee <goodguy.lee@samsung.com>
This commit is contained in:
Uma Shankar 2012-05-25 21:21:44 +05:30 • committed by Wolfgang Denk
parent 4d3c95f5ea
commit a1596438a6
16 changed files with 2036 additions and 1340 deletions
Download patch file Download diff file Expand all files Collapse all files

145
fs/ext4/dev.c Normal file
View file

@ -0,0 +1,145 @@
/*
* (C) Copyright 2011 - 2012 Samsung Electronics
* EXT4 filesystem implementation in Uboot by
* Uma Shankar <uma.shankar@samsung.com>
* Manjunatha C Achar <a.manjunatha@samsung.com>
*
* made from existing ext2/dev.c file of Uboot
* (C) Copyright 2004
* esd gmbh <www.esd-electronics.com>
* Reinhard Arlt <reinhard.arlt@esd-electronics.com>
*
* based on code of fs/reiserfs/dev.c by
*
* (C) Copyright 2003 - 2004
* Sysgo AG, <www.elinos.com>, Pavel Bartusek <pba@sysgo.com>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*
*/
/*
* Changelog:
* 0.1 - Newly created file for ext4fs support. Taken from
* fs/ext2/dev.c file in uboot.
*/
#include <common.h>
#include <config.h>
#include <ext_common.h>
static block_dev_desc_t *ext4fs_block_dev_desc;
static disk_partition_t part_info;
int ext4fs_set_blk_dev(block_dev_desc_t *rbdd, int part)
{
ext4fs_block_dev_desc = rbdd;
if (part == 0) {
/* disk doesn't use partition table */
part_info.start = 0;
part_info.size = rbdd->lba;
part_info.blksz = rbdd->blksz;
} else {
if (get_partition_info(ext4fs_block_dev_desc,
part, &part_info))
return 0;
}
return part_info.size;
}
int ext4fs_devread(int sector, int byte_offset, int byte_len, char *buf)
{
char sec_buf[SECTOR_SIZE];
unsigned block_len;
/* Check partition boundaries */
if ((sector < 0)
|| ((sector + ((byte_offset + byte_len - 1) >> SECTOR_BITS)) >=
part_info.size)) {
printf("%s read outside partition %d\n", __func__, sector);
return 0;
}
/* Get the read to the beginning of a partition */
sector += byte_offset >> SECTOR_BITS;
byte_offset &= SECTOR_SIZE - 1;
debug(" <%d, %d, %d>\n", sector, byte_offset, byte_len);
if (ext4fs_block_dev_desc == NULL) {
printf("** Invalid Block Device Descriptor (NULL)\n");
return 0;
}
if (byte_offset != 0) {
/* read first part which isn't aligned with start of sector */
if (ext4fs_block_dev_desc->
block_read(ext4fs_block_dev_desc->dev,
part_info.start + sector, 1,
(unsigned long *) sec_buf) != 1) {
printf(" ** ext2fs_devread() read error **\n");
return 0;
}
memcpy(buf, sec_buf + byte_offset,
min(SECTOR_SIZE - byte_offset, byte_len));
buf += min(SECTOR_SIZE - byte_offset, byte_len);
byte_len -= min(SECTOR_SIZE - byte_offset, byte_len);
sector++;
}
if (byte_len == 0)
return 1;
/* read sector aligned part */
block_len = byte_len & ~(SECTOR_SIZE - 1);
if (block_len == 0) {
u8 p[SECTOR_SIZE];
block_len = SECTOR_SIZE;
ext4fs_block_dev_desc->block_read(ext4fs_block_dev_desc->dev,
part_info.start + sector,
1, (unsigned long *)p);
memcpy(buf, p, byte_len);
return 1;
}
if (ext4fs_block_dev_desc->block_read(ext4fs_block_dev_desc->dev,
part_info.start + sector,
block_len / SECTOR_SIZE,
(unsigned long *) buf) !=
block_len / SECTOR_SIZE) {
printf(" ** %s read error - block\n", __func__);
return 0;
}
block_len = byte_len & ~(SECTOR_SIZE - 1);
buf += block_len;
byte_len -= block_len;
sector += block_len / SECTOR_SIZE;
if (byte_len != 0) {
/* read rest of data which are not in whole sector */
if (ext4fs_block_dev_desc->
block_read(ext4fs_block_dev_desc->dev,
part_info.start + sector, 1,
(unsigned long *) sec_buf) != 1) {
printf("* %s read error - last part\n", __func__);
return 0;
}
memcpy(buf, sec_buf, byte_len);
}
return 1;
}