| 1 | // ========== Copyright Header Begin ========================================== |
| 2 | // |
| 3 | // OpenSPARC T2 Processor File: ncu_eccchk11_ctl.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 | // |
| 30 | // Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara, |
| 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 | module ncu_eccchk11_ctl ( |
| 36 | din, |
| 37 | ci, |
| 38 | ue, |
| 39 | ce, |
| 40 | dout, |
| 41 | co) ; |
| 42 | wire [4:0] e; |
| 43 | |
| 44 | |
| 45 | input [10:0] din; |
| 46 | input [4:0] ci; |
| 47 | |
| 48 | output ue; |
| 49 | output ce; |
| 50 | |
| 51 | output [10:0] dout; |
| 52 | output [4:0] co; |
| 53 | |
| 54 | |
| 55 | reg ue; |
| 56 | reg ce; |
| 57 | reg [10:0] dout; |
| 58 | reg [4:0] co; |
| 59 | |
| 60 | |
| 61 | assign e[4] = ^{din[10:0],ci[4:0]} ; |
| 62 | assign e[3] = ^{din[10:4],ci[3]} ; |
| 63 | assign e[2] = ^{din[10:7],din[3:1],ci[2]} ; |
| 64 | assign e[1] = ^{din[10:9],din[6:5],din[3:2],din[0],ci[1]} ; |
| 65 | assign e[0] = ^{din[10],din[8],din[6],din[4:3],din[1:0],ci[0]} ; |
| 66 | |
| 67 | always@(e or din or ci) begin |
| 68 | dout[10:0]=din[10:0]; |
| 69 | co[4:0]=ci[4:0]; |
| 70 | ue=1'b0; |
| 71 | ce=1'b1; |
| 72 | case(e[4:0]) |
| 73 | {1'b0,4'd0} : begin |
| 74 | ue=1'b0; |
| 75 | ce=1'b0; |
| 76 | dout[10:0]=din[10:0]; |
| 77 | co[4:0]=ci[4:0]; |
| 78 | end |
| 79 | {1'b1,4'd0} : co[4] = ~ci[4]; |
| 80 | {1'b1,4'd1} : co[0] = ~ci[0]; |
| 81 | {1'b1,4'd2} : co[1] = ~ci[1]; |
| 82 | {1'b1,4'd3} : dout[0] = ~din[0]; |
| 83 | {1'b1,4'd4} : co[2] = ~ci[2]; |
| 84 | {1'b1,4'd5} : dout[1] = ~din[1]; |
| 85 | {1'b1,4'd6} : dout[2] = ~din[2]; |
| 86 | {1'b1,4'd7} : dout[3] = ~din[3]; |
| 87 | {1'b1,4'd8} : co[3] = ~ci[3]; |
| 88 | {1'b1,4'd9} : dout[4] = ~din[4]; |
| 89 | {1'b1,4'd10}: dout[5] = ~din[5]; |
| 90 | {1'b1,4'd11}: dout[6] = ~din[6]; |
| 91 | {1'b1,4'd12}: dout[7] = ~din[7]; |
| 92 | {1'b1,4'd13}: dout[8] = ~din[8]; |
| 93 | {1'b1,4'd14}: dout[9] = ~din[9]; |
| 94 | {1'b1,4'd15}: dout[10] = ~din[10]; |
| 95 | default : begin |
| 96 | dout[10:0]=din[10:0]; |
| 97 | co[4:0]=ci[4:0]; |
| 98 | ue=1'b1; |
| 99 | ce=1'b0; |
| 100 | end |
| 101 | endcase |
| 102 | end |
| 103 | |
| 104 | endmodule |
| 105 | |
| 106 | |
| 107 | |
| 108 | |
| 109 | |
| 110 | |