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