| 1 | // ========== Copyright Header Begin ========================================== |
| 2 | // |
| 3 | // OpenSPARC T2 Processor File: niu_70data_ecc_check.v |
| 4 | // Copyright (C) 1995-2007 Sun Microsystems, Inc. All Rights Reserved |
| 5 | // 4150 Network Circle, Santa Clara, California 95054, U.S.A. |
| 6 | // |
| 7 | // * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
| 8 | // |
| 9 | // This program is free software; you can redistribute it and/or modify |
| 10 | // it under the terms of the GNU General Public License as published by |
| 11 | // the Free Software Foundation; version 2 of the License. |
| 12 | // |
| 13 | // This program is distributed in the hope that it will be useful, |
| 14 | // but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 15 | // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 16 | // GNU General Public License for more details. |
| 17 | // |
| 18 | // You should have received a copy of the GNU General Public License |
| 19 | // along with this program; if not, write to the Free Software |
| 20 | // Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA |
| 21 | // |
| 22 | // For the avoidance of doubt, and except that if any non-GPL license |
| 23 | // choice is available it will apply instead, Sun elects to use only |
| 24 | // the General Public License version 2 (GPLv2) at this time for any |
| 25 | // software where a choice of GPL license versions is made |
| 26 | // available with the language indicating that GPLv2 or any later version |
| 27 | // may be used, or where a choice of which version of the GPL is applied is |
| 28 | // otherwise unspecified. |
| 29 | // |
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| 31 | // CA 95054 USA or visit www.sun.com if you need additional information or |
| 32 | // have any questions. |
| 33 | // |
| 34 | // ========== Copyright Header End ============================================ |
| 35 | `timescale 1ns/1ns |
| 36 | // **************************************************************************** |
| 37 | // Copyright (c) 2002 by Sun Microsystems Inc. |
| 38 | // |
| 39 | // All rights reserved. No part of this design may be reproduced stored |
| 40 | // in a retrieval system, or transmitted, in any form or by any means, |
| 41 | // electronic, mechanical, photocopying, recording, or otherwise, without |
| 42 | // prior written permission of Sun Microsystems, Inc. |
| 43 | // |
| 44 | // Sun Proprietary/Confidential |
| 45 | // |
| 46 | // **************************************************************************** |
| 47 | // File Name : niu_70data_ecc_check.sv |
| 48 | // Version : /main/1 |
| 49 | // Last Update : 07/19/04 19:33:18 loj |
| 50 | // **************************************************************************** |
| 51 | // Module : niu_70data_ecc_check |
| 52 | // Description : Syndrome Gen. and Correction Circuitry for SEC-DED code |
| 53 | // For SEC and SEC-DED, din[77:0] refers to |
| 54 | // {data bits[69:0], check bits[7:0]}. |
| 55 | // dout [77:0] refers to {data bits[69:0], check bits[7:0]} |
| 56 | // if the -p switch is not set and |
| 57 | // {data bits[69:0]} if the -p switch is set. |
| 58 | // Order of bits in din and dout [77:0] are the same as |
| 59 | // dout[77:0] of the ecc_generate module (-p not set). |
| 60 | // |
| 61 | // Error Signals: error covers CE+UE events, corr_error |
| 62 | // covers CE events and uncorr_error covers UE events. |
| 63 | // This module is used while reading data |
| 64 | // *************************************************************************** |
| 65 | // Revision History |
| 66 | // Date Author Description |
| 67 | // 07/19/04 loj Initial verilog generated from ECC automation script |
| 68 | // **************************************************************************** |
| 69 | |
| 70 | |
| 71 | module niu_70data_ecc_check (din, dout, no_error, error, corr_error, uncorr_error); |
| 72 | |
| 73 | |
| 74 | input [77:0] din; |
| 75 | output [77:0] dout; |
| 76 | output no_error; |
| 77 | output error; |
| 78 | output corr_error; |
| 79 | output uncorr_error; |
| 80 | |
| 81 | wire [7:0] syn; |
| 82 | assign syn[7] = din[75] ^ din[72] ^ din[70] ^ din[67] ^ din[65] ^ din[62] ^ din[59] ^ din[56] ^ din[53] ^ din[51] ^ din[49] ^ din[45] ^ din[43] ^ din[41] ^ din[37] ^ din[36] ^ din[32] ^ din[29] ^ din[28] ^ din[24] ^ din[23] ^ din[20] ^ din[18] ^ din[17] ^ din[15] ^ din[14] ^ din[12] ^ din[11] ^ din[9] ^ din[7]; |
| 83 | assign syn[6] = din[75] ^ din[73] ^ din[70] ^ din[67] ^ din[64] ^ din[62] ^ din[60] ^ din[57] ^ din[54] ^ din[52] ^ din[48] ^ din[46] ^ din[44] ^ din[40] ^ din[38] ^ din[35] ^ din[32] ^ din[31] ^ din[27] ^ din[24] ^ din[22] ^ din[20] ^ din[19] ^ din[17] ^ din[15] ^ din[14] ^ din[12] ^ din[10] ^ din[9] ^ din[6]; |
| 84 | assign syn[5] = din[76] ^ din[73] ^ din[70] ^ din[68] ^ din[65] ^ din[63] ^ din[59] ^ din[57] ^ din[54] ^ din[51] ^ din[49] ^ din[47] ^ din[43] ^ din[42] ^ din[39] ^ din[35] ^ din[34] ^ din[30] ^ din[27] ^ din[26] ^ din[25] ^ din[20] ^ din[19] ^ din[17] ^ din[16] ^ din[14] ^ din[13] ^ din[11] ^ din[9] ^ din[8] ^ din[5]; |
| 85 | assign syn[4] = din[76] ^ din[73] ^ din[71] ^ din[68] ^ din[65] ^ din[62] ^ din[61] ^ din[58] ^ din[55] ^ din[52] ^ din[50] ^ din[46] ^ din[44] ^ din[41] ^ din[38] ^ din[36] ^ din[33] ^ din[30] ^ din[29] ^ din[25] ^ din[23] ^ din[21] ^ din[19] ^ din[17] ^ din[16] ^ din[14] ^ din[12] ^ din[11] ^ din[9] ^ din[8] ^ din[4]; |
| 86 | assign syn[3] = din[76] ^ din[74] ^ din[71] ^ din[69] ^ din[66] ^ din[63] ^ din[60] ^ din[57] ^ din[55] ^ din[52] ^ din[49] ^ din[47] ^ din[45] ^ din[41] ^ din[40] ^ din[37] ^ din[33] ^ din[31] ^ din[28] ^ din[26] ^ din[24] ^ din[21] ^ din[19] ^ din[18] ^ din[16] ^ din[14] ^ din[13] ^ din[11] ^ din[10] ^ din[8] ^ din[3]; |
| 87 | assign syn[2] = din[77] ^ din[74] ^ din[71] ^ din[68] ^ din[66] ^ din[63] ^ din[60] ^ din[58] ^ din[56] ^ din[53] ^ din[50] ^ din[48] ^ din[44] ^ din[43] ^ din[39] ^ din[36] ^ din[34] ^ din[32] ^ din[28] ^ din[27] ^ din[22] ^ din[21] ^ din[19] ^ din[18] ^ din[16] ^ din[15] ^ din[13] ^ din[11] ^ din[10] ^ din[8] ^ din[2]; |
| 88 | assign syn[1] = din[77] ^ din[74] ^ din[72] ^ din[69] ^ din[67] ^ din[64] ^ din[61] ^ din[58] ^ din[55] ^ din[53] ^ din[51] ^ din[47] ^ din[45] ^ din[42] ^ din[39] ^ din[38] ^ din[35] ^ din[31] ^ din[29] ^ din[25] ^ din[22] ^ din[21] ^ din[20] ^ din[18] ^ din[16] ^ din[15] ^ din[13] ^ din[12] ^ din[10] ^ din[9] ^ din[1]; |
| 89 | assign syn[0] = din[77] ^ din[75] ^ din[72] ^ din[69] ^ din[66] ^ din[64] ^ din[61] ^ din[59] ^ din[56] ^ din[54] ^ din[50] ^ din[48] ^ din[46] ^ din[42] ^ din[40] ^ din[37] ^ din[34] ^ din[33] ^ din[30] ^ din[26] ^ din[23] ^ din[21] ^ din[20] ^ din[18] ^ din[17] ^ din[15] ^ din[13] ^ din[12] ^ din[10] ^ din[8] ^ din[0]; |
| 90 | |
| 91 | assign dout[77] = din[77] ^ (syn == 8'b00000111); |
| 92 | assign dout[76] = din[76] ^ (syn == 8'b00111000); |
| 93 | assign dout[75] = din[75] ^ (syn == 8'b11000001); |
| 94 | assign dout[74] = din[74] ^ (syn == 8'b00001110); |
| 95 | assign dout[73] = din[73] ^ (syn == 8'b01110000); |
| 96 | assign dout[72] = din[72] ^ (syn == 8'b10000011); |
| 97 | assign dout[71] = din[71] ^ (syn == 8'b00011100); |
| 98 | assign dout[70] = din[70] ^ (syn == 8'b11100000); |
| 99 | assign dout[69] = din[69] ^ (syn == 8'b00001011); |
| 100 | assign dout[68] = din[68] ^ (syn == 8'b00110100); |
| 101 | assign dout[67] = din[67] ^ (syn == 8'b11000010); |
| 102 | assign dout[66] = din[66] ^ (syn == 8'b00001101); |
| 103 | assign dout[65] = din[65] ^ (syn == 8'b10110000); |
| 104 | assign dout[64] = din[64] ^ (syn == 8'b01000011); |
| 105 | assign dout[63] = din[63] ^ (syn == 8'b00101100); |
| 106 | assign dout[62] = din[62] ^ (syn == 8'b11010000); |
| 107 | assign dout[61] = din[61] ^ (syn == 8'b00010011); |
| 108 | assign dout[60] = din[60] ^ (syn == 8'b01001100); |
| 109 | assign dout[59] = din[59] ^ (syn == 8'b10100001); |
| 110 | assign dout[58] = din[58] ^ (syn == 8'b00010110); |
| 111 | assign dout[57] = din[57] ^ (syn == 8'b01101000); |
| 112 | assign dout[56] = din[56] ^ (syn == 8'b10000101); |
| 113 | assign dout[55] = din[55] ^ (syn == 8'b00011010); |
| 114 | assign dout[54] = din[54] ^ (syn == 8'b01100001); |
| 115 | assign dout[53] = din[53] ^ (syn == 8'b10000110); |
| 116 | assign dout[52] = din[52] ^ (syn == 8'b01011000); |
| 117 | assign dout[51] = din[51] ^ (syn == 8'b10100010); |
| 118 | assign dout[50] = din[50] ^ (syn == 8'b00010101); |
| 119 | assign dout[49] = din[49] ^ (syn == 8'b10101000); |
| 120 | assign dout[48] = din[48] ^ (syn == 8'b01000101); |
| 121 | assign dout[47] = din[47] ^ (syn == 8'b00101010); |
| 122 | assign dout[46] = din[46] ^ (syn == 8'b01010001); |
| 123 | assign dout[45] = din[45] ^ (syn == 8'b10001010); |
| 124 | assign dout[44] = din[44] ^ (syn == 8'b01010100); |
| 125 | assign dout[43] = din[43] ^ (syn == 8'b10100100); |
| 126 | assign dout[42] = din[42] ^ (syn == 8'b00100011); |
| 127 | assign dout[41] = din[41] ^ (syn == 8'b10011000); |
| 128 | assign dout[40] = din[40] ^ (syn == 8'b01001001); |
| 129 | assign dout[39] = din[39] ^ (syn == 8'b00100110); |
| 130 | assign dout[38] = din[38] ^ (syn == 8'b01010010); |
| 131 | assign dout[37] = din[37] ^ (syn == 8'b10001001); |
| 132 | assign dout[36] = din[36] ^ (syn == 8'b10010100); |
| 133 | assign dout[35] = din[35] ^ (syn == 8'b01100010); |
| 134 | assign dout[34] = din[34] ^ (syn == 8'b00100101); |
| 135 | assign dout[33] = din[33] ^ (syn == 8'b00011001); |
| 136 | assign dout[32] = din[32] ^ (syn == 8'b11000100); |
| 137 | assign dout[31] = din[31] ^ (syn == 8'b01001010); |
| 138 | assign dout[30] = din[30] ^ (syn == 8'b00110001); |
| 139 | assign dout[29] = din[29] ^ (syn == 8'b10010010); |
| 140 | assign dout[28] = din[28] ^ (syn == 8'b10001100); |
| 141 | assign dout[27] = din[27] ^ (syn == 8'b01100100); |
| 142 | assign dout[26] = din[26] ^ (syn == 8'b00101001); |
| 143 | assign dout[25] = din[25] ^ (syn == 8'b00110010); |
| 144 | assign dout[24] = din[24] ^ (syn == 8'b11001000); |
| 145 | assign dout[23] = din[23] ^ (syn == 8'b10010001); |
| 146 | assign dout[22] = din[22] ^ (syn == 8'b01000110); |
| 147 | assign dout[21] = din[21] ^ (syn == 8'b00011111); |
| 148 | assign dout[20] = din[20] ^ (syn == 8'b11100011); |
| 149 | assign dout[19] = din[19] ^ (syn == 8'b01111100); |
| 150 | assign dout[18] = din[18] ^ (syn == 8'b10001111); |
| 151 | assign dout[17] = din[17] ^ (syn == 8'b11110001); |
| 152 | assign dout[16] = din[16] ^ (syn == 8'b00111110); |
| 153 | assign dout[15] = din[15] ^ (syn == 8'b11000111); |
| 154 | assign dout[14] = din[14] ^ (syn == 8'b11111000); |
| 155 | assign dout[13] = din[13] ^ (syn == 8'b00101111); |
| 156 | assign dout[12] = din[12] ^ (syn == 8'b11010011); |
| 157 | assign dout[11] = din[11] ^ (syn == 8'b10111100); |
| 158 | assign dout[10] = din[10] ^ (syn == 8'b01001111); |
| 159 | assign dout[9] = din[9] ^ (syn == 8'b11110010); |
| 160 | assign dout[8] = din[8] ^ (syn == 8'b00111101); |
| 161 | assign dout[7] = din[7] ^ (syn == 8'b10000000); |
| 162 | assign dout[6] = din[6] ^ (syn == 8'b01000000); |
| 163 | assign dout[5] = din[5] ^ (syn == 8'b00100000); |
| 164 | assign dout[4] = din[4] ^ (syn == 8'b00010000); |
| 165 | assign dout[3] = din[3] ^ (syn == 8'b00001000); |
| 166 | assign dout[2] = din[2] ^ (syn == 8'b00000100); |
| 167 | assign dout[1] = din[1] ^ (syn == 8'b00000010); |
| 168 | assign dout[0] = din[0] ^ (syn == 8'b00000001); |
| 169 | |
| 170 | assign no_error = (syn == 8'b00000000); |
| 171 | assign error = (no_error != 1); |
| 172 | assign corr_error = ( syn == 8'b00000001 || syn == 8'b00000010 || syn == 8'b00000100 || syn == 8'b00001000 || syn == 8'b00010000 || syn == 8'b00100000 || syn == 8'b01000000 || syn == 8'b10000000 || syn == 8'b00111101 || syn == 8'b11110010 || syn == 8'b01001111 || syn == 8'b10111100 || syn == 8'b11010011 || syn == 8'b00101111 || syn == 8'b11111000 || syn == 8'b11000111 || syn == 8'b00111110 || syn == 8'b11110001 || syn == 8'b10001111 || syn == 8'b01111100 || syn == 8'b11100011 || syn == 8'b00011111 || syn == 8'b01000110 || syn == 8'b10010001 || syn == 8'b11001000 || syn == 8'b00110010 || syn == 8'b00101001 || syn == 8'b01100100 || syn == 8'b10001100 || syn == 8'b10010010 || syn == 8'b00110001 || syn == 8'b01001010 || syn == 8'b11000100 || syn == 8'b00011001 || syn == 8'b00100101 || syn == 8'b01100010 || syn == 8'b10010100 || syn == 8'b10001001 || syn == 8'b01010010 || syn == 8'b00100110 || syn == 8'b01001001 || syn == 8'b10011000 || syn == 8'b00100011 || syn == 8'b10100100 || syn == 8'b01010100 || syn == 8'b10001010 || syn == 8'b01010001 || syn == 8'b00101010 || syn == 8'b01000101 || syn == 8'b10101000 || syn == 8'b00010101 || syn == 8'b10100010 || syn == 8'b01011000 || syn == 8'b10000110 || syn == 8'b01100001 || syn == 8'b00011010 || syn == 8'b10000101 || syn == 8'b01101000 || syn == 8'b00010110 || syn == 8'b10100001 || syn == 8'b01001100 || syn == 8'b00010011 || syn == 8'b11010000 || syn == 8'b00101100 || syn == 8'b01000011 || syn == 8'b10110000 || syn == 8'b00001101 || syn == 8'b11000010 || syn == 8'b00110100 || syn == 8'b00001011 || syn == 8'b11100000 || syn == 8'b00011100 || syn == 8'b10000011 || syn == 8'b01110000 || syn == 8'b00001110 || syn == 8'b11000001 || syn == 8'b00111000 || syn == 8'b00000111); |
| 173 | assign uncorr_error = (corr_error!=1 && no_error!=1); |
| 174 | |
| 175 | endmodule |