mirror of
https://github.com/AsahiLinux/u-boot
synced 2024-11-19 03:08:31 +00:00
4101f68792
Use 'struct' instead of a typdef. Also since 'struct block_dev_desc' is long and causes 80-column violations, rename it to struct blk_desc. Signed-off-by: Simon Glass <sjg@chromium.org> Reviewed-by: Bin Meng <bmeng.cn@gmail.com> Tested-by: Stephen Warren <swarren@nvidia.com>
99 lines
2.3 KiB
C
99 lines
2.3 KiB
C
/*
|
|
* (C) Copyright 2003 - 2004
|
|
* Sysgo AG, <www.elinos.com>, Pavel Bartusek <pba@sysgo.com>
|
|
*
|
|
* SPDX-License-Identifier: GPL-2.0+
|
|
*/
|
|
|
|
|
|
#include <common.h>
|
|
#include <config.h>
|
|
#include <reiserfs.h>
|
|
|
|
#include "reiserfs_private.h"
|
|
|
|
static struct blk_desc *reiserfs_blk_desc;
|
|
static disk_partition_t *part_info;
|
|
|
|
|
|
void reiserfs_set_blk_dev(struct blk_desc *rbdd, disk_partition_t *info)
|
|
{
|
|
reiserfs_blk_desc = rbdd;
|
|
part_info = info;
|
|
}
|
|
|
|
|
|
int reiserfs_devread (int sector, int byte_offset, int byte_len, char *buf)
|
|
{
|
|
char sec_buf[SECTOR_SIZE];
|
|
unsigned block_len;
|
|
/*
|
|
unsigned len = byte_len;
|
|
u8 *start = buf;
|
|
*/
|
|
/*
|
|
* Check partition boundaries
|
|
*/
|
|
if (sector < 0
|
|
|| ((sector + ((byte_offset + byte_len - 1) >> SECTOR_BITS))
|
|
>= part_info->size)) {
|
|
/* errnum = ERR_OUTSIDE_PART; */
|
|
printf (" ** reiserfs_devread() read outside partition\n");
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* Get the read to the beginning of a partition.
|
|
*/
|
|
sector += byte_offset >> SECTOR_BITS;
|
|
byte_offset &= SECTOR_SIZE - 1;
|
|
|
|
#if defined(DEBUG)
|
|
printf (" <%d, %d, %d> ", sector, byte_offset, byte_len);
|
|
#endif
|
|
|
|
|
|
if (reiserfs_blk_desc == NULL)
|
|
return 0;
|
|
|
|
|
|
if (byte_offset != 0) {
|
|
/* read first part which isn't aligned with start of sector */
|
|
if (reiserfs_blk_desc->block_read(reiserfs_blk_desc,
|
|
part_info->start + sector,
|
|
1, (void *)sec_buf) != 1) {
|
|
printf (" ** reiserfs_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++;
|
|
}
|
|
|
|
/* read sector aligned part */
|
|
block_len = byte_len & ~(SECTOR_SIZE-1);
|
|
if (reiserfs_blk_desc->block_read(reiserfs_blk_desc,
|
|
part_info->start + sector,
|
|
block_len / SECTOR_SIZE, (void *)buf)
|
|
!= block_len/SECTOR_SIZE) {
|
|
printf (" ** reiserfs_devread() read error - block\n");
|
|
return 0;
|
|
}
|
|
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 (reiserfs_blk_desc->block_read(reiserfs_blk_desc,
|
|
part_info->start + sector,
|
|
1, (void *)sec_buf) != 1) {
|
|
printf (" ** reiserfs_devread() read error - last part\n");
|
|
return 0;
|
|
}
|
|
memcpy(buf, sec_buf, byte_len);
|
|
}
|
|
|
|
return 1;
|
|
}
|