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