1 /* 2 * (C) Copyright 2011 - 2012 Samsung Electronics 3 * EXT4 filesystem implementation in Uboot by 4 * Uma Shankar <uma.shankar@samsung.com> 5 * Manjunatha C Achar <a.manjunatha@samsung.com> 6 * 7 * made from existing ext2/dev.c file of Uboot 8 * (C) Copyright 2004 9 * esd gmbh <www.esd-electronics.com> 10 * Reinhard Arlt <reinhard.arlt@esd-electronics.com> 11 * 12 * based on code of fs/reiserfs/dev.c by 13 * 14 * (C) Copyright 2003 - 2004 15 * Sysgo AG, <www.elinos.com>, Pavel Bartusek <pba@sysgo.com> 16 * 17 * SPDX-License-Identifier: GPL-2.0+ 18 */ 19 20 /* 21 * Changelog: 22 * 0.1 - Newly created file for ext4fs support. Taken from 23 * fs/ext2/dev.c file in uboot. 24 */ 25 26 #include <common.h> 27 #include <blk.h> 28 #include <config.h> 29 #include <fs_internal.h> 30 #include <ext4fs.h> 31 #include <ext_common.h> 32 #include "ext4_common.h" 33 34 lbaint_t part_offset; 35 36 static struct blk_desc *ext4fs_blk_desc; 37 static disk_partition_t *part_info; 38 39 void ext4fs_set_blk_dev(struct blk_desc *rbdd, disk_partition_t *info) 40 { 41 assert(rbdd->blksz == (1 << rbdd->log2blksz)); 42 ext4fs_blk_desc = rbdd; 43 get_fs()->dev_desc = rbdd; 44 part_info = info; 45 part_offset = info->start; 46 get_fs()->total_sect = ((uint64_t)info->size * info->blksz) >> 47 get_fs()->dev_desc->log2blksz; 48 } 49 50 int ext4fs_devread(lbaint_t sector, int byte_offset, int byte_len, 51 char *buffer) 52 { 53 return fs_devread(get_fs()->dev_desc, part_info, sector, byte_offset, 54 byte_len, buffer); 55 } 56 57 int ext4_read_superblock(char *buffer) 58 { 59 struct ext_filesystem *fs = get_fs(); 60 int sect = SUPERBLOCK_START >> fs->dev_desc->log2blksz; 61 int off = SUPERBLOCK_START % fs->dev_desc->blksz; 62 63 return ext4fs_devread(sect, off, SUPERBLOCK_SIZE, 64 buffer); 65 } 66