ebh_media.h revision 1.1.6.2
1 1.1.6.2 yamt /* $NetBSD: ebh_media.h,v 1.1.6.2 2012/04/17 00:08:55 yamt Exp $ */ 2 1.1.6.2 yamt 3 1.1.6.2 yamt /*- 4 1.1.6.2 yamt * Copyright (c) 2010 Department of Software Engineering, 5 1.1.6.2 yamt * University of Szeged, Hungary 6 1.1.6.2 yamt * Copyright (C) 2009 Ferenc Havasi <havasi (at) inf.u-szeged.hu> 7 1.1.6.2 yamt * Copyright (C) 2009 Zoltan Sogor <weth (at) inf.u-szeged.hu> 8 1.1.6.2 yamt * Copyright (C) 2009 David Tengeri <dtengeri (at) inf.u-szeged.hu> 9 1.1.6.2 yamt * Copyright (C) 2010 Adam Hoka <ahoka (at) NetBSD.org> 10 1.1.6.2 yamt * All rights reserved. 11 1.1.6.2 yamt * 12 1.1.6.2 yamt * This code is derived from software contributed to The NetBSD Foundation 13 1.1.6.2 yamt * by the Department of Software Engineering, University of Szeged, Hungary 14 1.1.6.2 yamt * 15 1.1.6.2 yamt * Redistribution and use in source and binary forms, with or without 16 1.1.6.2 yamt * modification, are permitted provided that the following conditions 17 1.1.6.2 yamt * are met: 18 1.1.6.2 yamt * 1. Redistributions of source code must retain the above copyright 19 1.1.6.2 yamt * notice, this list of conditions and the following disclaimer. 20 1.1.6.2 yamt * 2. Redistributions in binary form must reproduce the above copyright 21 1.1.6.2 yamt * notice, this list of conditions and the following disclaimer in the 22 1.1.6.2 yamt * documentation and/or other materials provided with the distribution. 23 1.1.6.2 yamt * 24 1.1.6.2 yamt * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 25 1.1.6.2 yamt * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 26 1.1.6.2 yamt * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 27 1.1.6.2 yamt * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 28 1.1.6.2 yamt * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, 29 1.1.6.2 yamt * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; 30 1.1.6.2 yamt * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED 31 1.1.6.2 yamt * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, 32 1.1.6.2 yamt * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 33 1.1.6.2 yamt * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 34 1.1.6.2 yamt * SUCH DAMAGE. 35 1.1.6.2 yamt */ 36 1.1.6.2 yamt 37 1.1.6.2 yamt #ifndef EBH_MEDIA_H_ 38 1.1.6.2 yamt #define EBH_MEDIA_H_ 39 1.1.6.2 yamt 40 1.1.6.2 yamt #ifndef _LE_TYPES 41 1.1.6.2 yamt #define _LE_TYPES 42 1.1.6.2 yamt typedef uint16_t le16; 43 1.1.6.2 yamt typedef uint32_t le32; 44 1.1.6.2 yamt typedef uint64_t le64; 45 1.1.6.2 yamt #endif 46 1.1.6.2 yamt 47 1.1.6.2 yamt /*****************************************************************************/ 48 1.1.6.2 yamt /* EBH specific structures */ 49 1.1.6.2 yamt /*****************************************************************************/ 50 1.1.6.2 yamt #define CHFS_MAGIC_BITMASK 0x53454452 51 1.1.6.2 yamt 52 1.1.6.2 yamt #define CHFS_LID_NOT_DIRTY_BIT 0x80000000 53 1.1.6.2 yamt #define CHFS_LID_DIRTY_BIT_MASK 0x7fffffff 54 1.1.6.2 yamt 55 1.1.6.2 yamt /* sizeof(crc) + sizeof(lid) */ 56 1.1.6.2 yamt #define CHFS_INVALIDATE_SIZE 8 57 1.1.6.2 yamt 58 1.1.6.2 yamt /* Size of magic + crc_ec + erase_cnt */ 59 1.1.6.2 yamt #define CHFS_EB_EC_HDR_SIZE sizeof(struct chfs_eb_ec_hdr) 60 1.1.6.2 yamt /* Size of NOR eraseblock header */ 61 1.1.6.2 yamt #define CHFS_EB_HDR_NOR_SIZE sizeof(struct chfs_nor_eb_hdr) 62 1.1.6.2 yamt /* Size of NAND eraseblock header */ 63 1.1.6.2 yamt #define CHFS_EB_HDR_NAND_SIZE sizeof(struct chfs_nand_eb_hdr) 64 1.1.6.2 yamt 65 1.1.6.2 yamt /* 66 1.1.6.2 yamt * chfs_eb_ec_hdr - erase counter header of eraseblock 67 1.1.6.2 yamt * @magic: filesystem magic 68 1.1.6.2 yamt * @crc_ec: CRC32 sum of erase counter 69 1.1.6.2 yamt * @erase_cnt: erase counter 70 1.1.6.2 yamt * 71 1.1.6.2 yamt * This structure holds the erasablock description information. 72 1.1.6.2 yamt * This will be written to the beginning of the eraseblock. 73 1.1.6.2 yamt * 74 1.1.6.2 yamt */ 75 1.1.6.2 yamt struct chfs_eb_ec_hdr { 76 1.1.6.2 yamt le32 magic; 77 1.1.6.2 yamt le32 crc_ec; 78 1.1.6.2 yamt le32 erase_cnt; 79 1.1.6.2 yamt } __packed; 80 1.1.6.2 yamt 81 1.1.6.2 yamt /** 82 1.1.6.2 yamt * struct chfs_nor_eb_hdr - eraseblock header on NOR flash 83 1.1.6.2 yamt * @crc: CRC32 sum 84 1.1.6.2 yamt * @lid: logical identifier 85 1.1.6.2 yamt * 86 1.1.6.2 yamt * @lid contains the logical block reference but only the first 31 bit (0-30) is 87 1.1.6.2 yamt * used. The 32th bit is for marking a lid dirty (marked for recovery purposes). 88 1.1.6.2 yamt * If a new eraseblock is succesfully assigned with the same lid then the lid of 89 1.1.6.2 yamt * the old one is zeroed. If power failure happened during this operation then 90 1.1.6.2 yamt * the recovery detects that there is two eraseblock with the same lid, but one 91 1.1.6.2 yamt * of them is marked (the old one). 92 1.1.6.2 yamt * 93 1.1.6.2 yamt * Invalidated eraseblock header means that the @crc and @lid is set to 0. 94 1.1.6.2 yamt */ 95 1.1.6.2 yamt struct chfs_nor_eb_hdr { 96 1.1.6.2 yamt le32 crc; 97 1.1.6.2 yamt le32 lid; 98 1.1.6.2 yamt } __packed; 99 1.1.6.2 yamt 100 1.1.6.2 yamt /** 101 1.1.6.2 yamt * struct chfs_nand_eb_hdr - eraseblock header on NAND flash 102 1.1.6.2 yamt * @crc: CRC32 sum 103 1.1.6.2 yamt * @lid: logical identifier 104 1.1.6.2 yamt * @serial: layout of the lid 105 1.1.6.2 yamt * 106 1.1.6.2 yamt * @serial is an unique number. Every eraseblock header on NAND flash has its 107 1.1.6.2 yamt * own serial. If there are two eraseblock on the flash referencing to the same 108 1.1.6.2 yamt * logical eraseblock, the one with bigger serial is the newer. 109 1.1.6.2 yamt */ 110 1.1.6.2 yamt struct chfs_nand_eb_hdr { 111 1.1.6.2 yamt le32 crc; 112 1.1.6.2 yamt le32 lid; 113 1.1.6.2 yamt le64 serial; 114 1.1.6.2 yamt } __packed; 115 1.1.6.2 yamt 116 1.1.6.2 yamt #endif /* EBH_MEDIA_H_ */ 117
Indexes created Sat Nov 01 05:10:12 GMT 2025