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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 |