projects / OpenSPARC-T2-SAM / blame
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1 | /* |
| 2 | * ========== Copyright Header Begin ========================================== | |
| 3 | * | |
| 4 | * OpenSPARC T2 Processor File: BL_CKEcc.h | |
| 5 | * Copyright (c) 2006 Sun Microsystems, Inc. All Rights Reserved. | |
| 6 | * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES. | |
| 7 | * | |
| 8 | * The above named program is free software; you can redistribute it and/or | |
| 9 | * modify it under the terms of the GNU General Public | |
| 10 | * License version 2 as published by the Free Software Foundation. | |
| 11 | * | |
| 12 | * The above named program is distributed in the hope that it will be | |
| 13 | * useful, but WITHOUT ANY WARRANTY; without even the implied warranty of | |
| 14 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
| 15 | * General Public License for more details. | |
| 16 | * | |
| 17 | * You should have received a copy of the GNU General Public | |
| 18 | * License along with this work; if not, write to the Free Software | |
| 19 | * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA. | |
| 20 | * | |
| 21 | * ========== Copyright Header End ============================================ | |
| 22 | */ | |
| 23 | /************************************************************************ | |
| 24 | ** | |
| 25 | ** Copyright (C) 2007, Sun Microsystems, Inc. | |
| 26 | ** | |
| 27 | ** Sun considers its source code as an unpublished, proprietary | |
| 28 | ** trade secret and it is available only under strict license provisions. | |
| 29 | ** This copyright notice is placed here only to protect Sun in the event | |
| 30 | ** the source is deemed a published work. Disassembly, decompilation, | |
| 31 | ** or other means of reducing the object code to human readable form | |
| 32 | ** is prohibited by the license agreement under which this code is | |
| 33 | ** provided to the user or company in possession of this copy. | |
| 34 | ** | |
| 35 | *************************************************************************/ | |
| 36 | #ifndef __BL_CkEccFile_h__ | |
| 37 | #define __BL_CkEccFile_h__ | |
| 38 | #include <iostream.h> | |
| 39 | ||
| 40 | //This class models the chip-kill ECC algorithim based on | |
| 41 | //Appexdix 6 of the Niagara PRM. | |
| 42 | class BL_CKEccFile | |
| 43 | { | |
| 44 | public: | |
| 45 | // the data payload of a Chip-Kill Line (128-bits) | |
| 46 | class ChipKillLine | |
| 47 | { | |
| 48 | public: | |
| 49 | ChipKillLine() {} | |
| 50 | virtual ~ChipKillLine() {} | |
| 51 | uint64_t msdw; | |
| 52 | uint64_t lsdw; | |
| 53 | }; | |
| 54 | ||
| 55 | // calculates the ECC for a Chip-Kill line | |
| 56 | static uint32_t generateChipkillECC(ChipKillLine line); | |
| 57 | ||
| 58 | private: | |
| 59 | // Constructor declaration | |
| 60 | BL_CKEccFile(); | |
| 61 | ||
| 62 | // Destructor declaration | |
| 63 | ~BL_CKEccFile(); | |
| 64 | ||
| 65 | // Precalculated syndrome [0] - nibble order matches PRM. [1] - | |
| 66 | // nibble order matches DESR.SYND | |
| 67 | const static int syndrome[1024][2]; | |
| 68 | ||
| 69 | const static unsigned long long synd_exp_data [1024][2]; | |
| 70 | ||
| 71 | // Galois field multiplication table. Gives a 16 value by 16 | |
| 72 | // value result. This table was created by galois.perl, the | |
| 73 | // perl script used to calculate tables in the PRM | |
| 74 | const static uint8_t galois[16][16]; | |
| 75 | ||
| 76 | // Factor table. Gives the nibble to be added in to the result, | |
| 77 | // and the multiplication to be performed on it. | |
| 78 | struct mulfact | |
| 79 | { | |
| 80 | uint8_t mult; // multipler | |
| 81 | uint8_t nibble_num; // nibble number to multiply and add | |
| 82 | }; | |
| 83 | ||
| 84 | // nibble factor tables | |
| 85 | const static struct mulfact nibbles[]; | |
| 86 | }; | |
| 87 | #endif //__BL_CkEccFile_h__ |