| 1 | // ========== Copyright Header Begin ========================================== |
| 2 | // |
| 3 | // OpenSPARC T2 Processor File: niu_scam_pre.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 | |
| 36 | /********************************************************** |
| 37 | *********************************************************** |
| 38 | |
| 39 | Project : Niu |
| 40 | |
| 41 | File name : niu_scam_pre.v |
| 42 | |
| 43 | Module(s) name : niu_scam_pre |
| 44 | |
| 45 | Parent modules : niu_scam.v |
| 46 | |
| 47 | Child modules : |
| 48 | |
| 49 | Author's name : George Chu |
| 50 | |
| 51 | Date : Jan. 2004 |
| 52 | |
| 53 | Description : |
| 54 | |
| 55 | Synthesis Notes: |
| 56 | |
| 57 | Modification History: |
| 58 | Date Description |
| 59 | ---- ----------- |
| 60 | |
| 61 | ************************************************************ |
| 62 | ***********************************************************/ |
| 63 | |
| 64 | `timescale 1ns/10ps |
| 65 | |
| 66 | module niu_scam_pre (data_inp, cam_compare, |
| 67 | pio_wt, pio_rd, pio_sel, cam_index, |
| 68 | reset, cam_clk, |
| 69 | data_inp_d, cam_compare_d, |
| 70 | pio_wt_d, pio_rd_d, pio_sel_d, cam_index_d); |
| 71 | |
| 72 | input [199:0] data_inp; // compare_data/pio_write_data |
| 73 | input cam_compare; // initiate compare operation |
| 74 | input pio_wt; // if 1, pio writes to cam's data or mask planes. |
| 75 | input pio_rd; // if 1, pio reads from cam's data or mask planes. |
| 76 | input pio_sel; // pio access cam's mask<=1, data<=0 plane |
| 77 | input [6:0] cam_index; // pio access address, N2: {1'b0,cam_index[6:0]} |
| 78 | input reset; |
| 79 | input cam_clk; |
| 80 | output [199:0] data_inp_d; |
| 81 | output cam_compare_d; |
| 82 | output pio_wt_d; |
| 83 | output pio_rd_d; |
| 84 | output pio_sel_d; |
| 85 | output [6:0] cam_index_d; |
| 86 | |
| 87 | reg [199:0] data_inp_d; |
| 88 | reg cam_compare_d; |
| 89 | reg pio_wt_d; |
| 90 | reg pio_rd_d; |
| 91 | reg pio_sel_d; |
| 92 | reg [6:0] cam_index_d; |
| 93 | |
| 94 | always @(posedge cam_clk) begin |
| 95 | if (reset) begin |
| 96 | data_inp_d <= 200'h0; |
| 97 | cam_compare_d <= 1'h0; |
| 98 | pio_wt_d <= 1'h0; |
| 99 | pio_rd_d <= 1'h0; |
| 100 | pio_sel_d <= 1'h0; |
| 101 | cam_index_d <= 7'h0; |
| 102 | end |
| 103 | else begin |
| 104 | data_inp_d <= data_inp[199:0]; |
| 105 | cam_compare_d <= cam_compare; |
| 106 | pio_wt_d <= pio_wt; |
| 107 | pio_rd_d <= pio_rd; |
| 108 | pio_sel_d <= pio_sel; |
| 109 | cam_index_d <= cam_index[6:0]; |
| 110 | end |
| 111 | end |
| 112 | |
| 113 | endmodule |