67 lines
2.9 KiB
C
67 lines
2.9 KiB
C
/******************************************************************************
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* Copyright (c) 2004, 2008 IBM Corporation
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* All rights reserved.
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* This program and the accompanying materials
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* are made available under the terms of the BSD License
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* which accompanies this distribution, and is available at
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* http://www.opensource.org/licenses/bsd-license.php
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*
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* Contributors:
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* IBM Corporation - initial implementation
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*****************************************************************************/
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#ifndef CALCULATECRC_H
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#define CALCULATECRC_H
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#define FLASHFS_DATADDR 0x18 // uint64_t position of pointer to data
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#define FLASHFS_FILE_SIZE_ADDR 0x08 // uint64_t pos of total flashimage size value relative to data
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#define FLASHFS_HEADER_SIZE_ADDR 0x08 // uint64_t position of total flash header size value
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#ifdef __ASSEMBLER__
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// "CRC_GENERATOR" must contain equal inforamtion as "CRC_METHODE"
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#define CRC_GENERATOR 0x0000000004C11DB7
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#define CRC_REGISTERMASK 0x00000000FFFFFFFF
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#define CRC_REGISTERLENGTH 32
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#endif /* __ASSEMBLER__ */
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#ifndef __ASSEMBLER__
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#define FLASHFS_ROMADDR 0x00 // uint64_t position of pointer to next file
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#define FLASHFS_HEADER_DATA_SIZE 0x68 // 104 bytes of total header data size
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#define CRC_METHODE Ethernet_32 // define the CRc genarator (CRC 16 bit to 64 is supported)
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//--- header format ---------------------------------
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struct stH {
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char magic[8]; // (generic!) headerfile
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uint64_t flashlen; // dyn
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char version[16]; // $DRIVER_INFO alignment!
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char platform_name[32]; // (hardware) headerfile
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char date[6]; // dyn (format -> JB)
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char padding1[2]; // padding byte
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char mdate[6]; // modify date
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char padding2[2]; // padding byte
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char platform_revision[4];// (hardware) headerfile
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uint32_t padding;
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uint64_t ui64CRC; // insert calculated CRC here
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uint64_t ui64FileEnd; // = 0xFFFF FFFF FFFF FFFF
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};
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#endif /* __ASSEMBLER__ */
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#endif /* CALCULATECRC_H */
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/*--- supported CRC Generators -------------------------
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+ Name length usage Generator
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+ Tap_16 16 bit Tape 0x00008005
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+ Floppy_16 16 bit Floppy 0x00001021
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+ Ethernet_32 32 bit Ethernet 0x04C11DB7
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+ SPTrEMBL_64 64 bit white noise like date 0x0000001B
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+ SPTrEMBL_improved_64 64 bit DNA code like date 0xAD93D23594C9362D
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+ DLT1_64 64 bit Tape 0x42F0E1EBA9EA3693
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+
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+ CRC_REGISTERLENGTH = bit length
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+ CRC_REGISTERMASK = -1 for a n-bit numer where n = bit length
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+ example TAP_16: CRC_REGSISTERLENGTH = 16
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+ CRC_REGISTERMASK = 0xFFFFFFFF = (-1 if 16 bit number is used)
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+
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+ TrEMBL see also http://www.cs.ud.ac.uk/staff/D.Jones/crcbote.pdf
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+ DLT1 se also http://www.ecma-international.org/publications/files/ECMA-ST/Ecma-182.pdf
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+--------------------------------------------------------*/
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