qemu/roms/SLOF/include/calculatecrc.h

   1 /******************************************************************************
   2  * Copyright (c) 2004, 2008 IBM Corporation
   3  * All rights reserved.
   4  * This program and the accompanying materials
   5  * are made available under the terms of the BSD License
   6  * which accompanies this distribution, and is available at
   7  * http://www.opensource.org/licenses/bsd-license.php
   8  *
   9  * Contributors:
  10  *     IBM Corporation - initial implementation
  11  *****************************************************************************/
  12 #ifndef CALCULATECRC_H
  13 #define CALCULATECRC_H
  14
  15         #define FLASHFS_DATADDR 0x18                // uint64_t position of pointer to data
  16         #define FLASHFS_FILE_SIZE_ADDR 0x08         // uint64_t pos of total flashimage size value relative to data
  17         #define FLASHFS_HEADER_SIZE_ADDR 0x08       // uint64_t position of total flash header size value
  18
  19         #ifdef __ASSEMBLER__
  20                 // "CRC_GENERATOR" must contain equal inforamtion as "CRC_METHODE"
  21                 #define CRC_GENERATOR 0x0000000004C11DB7
  22                 #define CRC_REGISTERMASK 0x00000000FFFFFFFF
  23                 #define CRC_REGISTERLENGTH 32
  24         #endif          /* __ASSEMBLER__ */
  25
  26         #ifndef __ASSEMBLER__
  27                 #define FLASHFS_ROMADDR 0x00            // uint64_t position of pointer to next file
  28                 #define FLASHFS_HEADER_DATA_SIZE 0x68   // 104 bytes of total header data size
  29                 #define CRC_METHODE Ethernet_32         // define the CRc genarator (CRC 16 bit to 64 is supported)
  30
  31         //--- header format ---------------------------------
  32                 struct stH {
  33                                 char magic[8];            // (generic!) headerfile
  34                                 uint64_t flashlen;        // dyn
  35                                 char version[16];         // $DRIVER_INFO alignment!
  36                                 char platform_name[32];   // (hardware)   headerfile
  37                                 char date[6];             // dyn (format -> JB)
  38                                 char padding1[2];         // padding byte
  39                                 char mdate[6];            // modify date
  40                                 char padding2[2];         // padding byte
  41                                 char platform_revision[4];// (hardware)   headerfile
  42                                 uint32_t padding;
  43                                 uint64_t ui64CRC;         // insert calculated CRC here
  44                                 uint64_t ui64FileEnd;     // = 0xFFFF FFFF FFFF FFFF
  45                 };
  46         #endif          /* __ASSEMBLER__ */
  47
  48 #endif          /* CALCULATECRC_H */
  49
  50 /*--- supported CRC Generators -------------------------
  51 +       Name                                            length          usage                                           Generator
  52 +       Tap_16                                          16 bit          Tape                                            0x00008005
  53 +       Floppy_16                                       16 bit          Floppy                                          0x00001021
  54 +       Ethernet_32                                     32 bit          Ethernet                                        0x04C11DB7
  55 +       SPTrEMBL_64                                     64 bit          white noise like date           0x0000001B
  56 +       SPTrEMBL_improved_64            64 bit          DNA code like date                      0xAD93D23594C9362D
  57 +       DLT1_64                                         64 bit          Tape                                            0x42F0E1EBA9EA3693
  58 +
  59 +       CRC_REGISTERLENGTH      = bit length
  60 +       CRC_REGISTERMASK        = -1 for a n-bit numer where n = bit length
  61 +               example TAP_16:         CRC_REGSISTERLENGTH = 16
  62 +                                                       CRC_REGISTERMASK = 0xFFFFFFFF = (-1 if 16 bit number is used)
  63 +
  64 +       TrEMBL see also http://www.cs.ud.ac.uk/staff/D.Jones/crcbote.pdf
  65 +       DLT1 se also    http://www.ecma-international.org/publications/files/ECMA-ST/Ecma-182.pdf
  66 +--------------------------------------------------------*/