1/* 2 * YAFFS: Yet Another Flash File System. A NAND-flash specific file system. 3 * 4 * Copyright (C) 2002-2010 Aleph One Ltd. 5 * for Toby Churchill Ltd and Brightstar Engineering 6 * 7 * Created by Charles Manning <charles@aleph1.co.uk> 8 * 9 * This program is free software; you can redistribute it and/or modify 10 * it under the terms of the GNU General Public License version 2 as 11 * published by the Free Software Foundation. 12 */ 13 14#include "yaffs_packedtags1.h" 15#include "yportenv.h" 16 17void yaffs_PackTags1(yaffs_PackedTags1 *pt, const yaffs_ext_tags *t) 18{ 19 pt->chunk_id = t->chunk_id; 20 pt->serial_number = t->serial_number; 21 pt->n_bytes = t->n_bytes; 22 pt->obj_id = t->obj_id; 23 pt->ecc = 0; 24 pt->deleted = (t->is_deleted) ? 0 : 1; 25 pt->unusedStuff = 0; 26 pt->shouldBeFF = 0xFFFFFFFF; 27 28} 29 30void yaffs_unpack_tags1(yaffs_ext_tags *t, const yaffs_PackedTags1 *pt) 31{ 32 static const __u8 allFF[] = 33 { 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 340xff }; 35 36 if (memcmp(allFF, pt, sizeof(yaffs_PackedTags1))) { 37 t->block_bad = 0; 38 if (pt->shouldBeFF != 0xFFFFFFFF) 39 t->block_bad = 1; 40 t->chunk_used = 1; 41 t->obj_id = pt->obj_id; 42 t->chunk_id = pt->chunk_id; 43 t->n_bytes = pt->n_bytes; 44 t->ecc_result = YAFFS_ECC_RESULT_NO_ERROR; 45 t->is_deleted = (pt->deleted) ? 0 : 1; 46 t->serial_number = pt->serial_number; 47 } else { 48 memset(t, 0, sizeof(yaffs_ext_tags)); 49 } 50} 51