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1 | // ========== Copyright Header Begin ========================================== |
2 | // | |
3 | // OpenSPARC T2 Processor File: niu_scam.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.v | |
42 | ||
43 | Module(s) name : niu_scam | |
44 | ||
45 | Parent modules : niu_scam.v | |
46 | ||
47 | Child modules : niu_scam_lib.v | |
48 | ||
49 | Author's name : George Chu | |
50 | ||
51 | Date : April, 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 ( | |
67 | data_inp, cam_compare, | |
68 | pio_wt, pio_rd, pio_sel, cam_index, | |
69 | reset, clk, | |
70 | cam_valid, cam_hit, cam_haddr, | |
71 | pio_rd_vld, | |
72 | msk_dat_out); | |
73 | ||
74 | input [199:0] data_inp; // compare_data/pio_data_input | |
75 | input cam_compare; // initiate compare operation | |
76 | input pio_wt; // if 1, pio writes to cam's data or mask or valid planes. | |
77 | input pio_rd; // if 1, pio reads from cam's data or mask or valid planes. | |
78 | input pio_sel; // pio access cam's mask<=1, data<=0 plane | |
79 | input [6:0] cam_index; // pio access address, N2: {1'b0,cam_index[6:0]} | |
80 | input reset; | |
81 | input clk; | |
82 | output cam_valid; // if 1, cam is ready to accept a new comparison | |
83 | output cam_hit; // if 1, there is a cam match/hit | |
84 | output [6:0] cam_haddr; // index of a cam match/hit entry, N2: {1'b0,haddr[6:0]} | |
85 | output pio_rd_vld; // pio_read_out_data valid for the core_clk domain | |
86 | output [199:0] msk_dat_out; // pio data read out of cam's mask or data plane | |
87 | ||
88 | wire cam_valid; | |
89 | wire cam_hit; | |
90 | wire [6:0] cam_haddr; | |
91 | wire pio_rd_vld; | |
92 | wire [199:0] msk_dat_out; | |
93 | ||
94 | // ----------- cam's pre-registers -------------------- | |
95 | wire [199:0] data_inp_d; | |
96 | wire cam_compare_d; | |
97 | wire pio_wt_d; | |
98 | wire pio_rd_d; | |
99 | wire pio_sel_d; | |
100 | wire [6:0] cam_index_d; | |
101 | ||
102 | // ----------- cam's match_array ---------------------- | |
103 | wire [127:0] match_array; | |
104 | ||
105 | // ----------- cam's control -------------------------- | |
106 | wire cmp_enc; | |
107 | wire cmp_busy; | |
108 | wire clr_cam; | |
109 | wire c_scam_st; | |
110 | wire wt_data; | |
111 | wire wt_mask; | |
112 | wire rd_data; | |
113 | wire rd_mask; | |
114 | wire c_pio_rw_st; | |
115 | ||
116 | // =================================== CAM's data pre_registered ========================== | |
117 | niu_scam_pre niu_scam_pre0 ( | |
118 | .data_inp (data_inp[199:0]), | |
119 | .cam_compare (cam_compare), | |
120 | .pio_wt (pio_wt), | |
121 | .pio_rd (pio_rd), | |
122 | .pio_sel (pio_sel), | |
123 | .cam_index (cam_index[6:0]), | |
124 | .reset (reset), | |
125 | .cam_clk (clk), | |
126 | .data_inp_d (data_inp_d[199:0]), | |
127 | .cam_compare_d (cam_compare_d), | |
128 | .pio_wt_d (pio_wt_d), | |
129 | .pio_rd_d (pio_rd_d), | |
130 | .pio_sel_d (pio_sel_d), | |
131 | .cam_index_d (cam_index_d[6:0]) | |
132 | ); | |
133 | ||
134 | // =================================== CAM's arrays ======================================= | |
135 | niu_scam_ary niu_scam_ary0 ( | |
136 | .data_inp_d (data_inp_d[199:0]), | |
137 | .wt_data (wt_data), | |
138 | .wt_mask (wt_mask), | |
139 | .rd_data (rd_data), | |
140 | .rd_mask (rd_mask), | |
141 | .cam_index_d (cam_index_d[6:0]), | |
142 | .reset (reset), | |
143 | .cam_clk (clk), | |
144 | .match_array (match_array[127:0]), | |
145 | .msk_dat_out (msk_dat_out[199:0]) | |
146 | ); | |
147 | ||
148 | // =================================== CAM's priority encoder ============================= | |
149 | niu_scam_enc niu_scam_enc0 ( | |
150 | .match_array (match_array[127:0]), | |
151 | .cmp_enc (cmp_enc), | |
152 | .reset (reset), | |
153 | .cam_clk (clk), | |
154 | .cam_hit (cam_hit), | |
155 | .cam_haddr (cam_haddr[6:0]) | |
156 | ); | |
157 | ||
158 | // =================================== CAM's control ====================================== | |
159 | niu_scam_ctl niu_scam_ctl0 ( | |
160 | .cam_compare_d (cam_compare_d), | |
161 | .pio_wt_d (pio_wt_d), | |
162 | .pio_rd_d (pio_rd_d), | |
163 | .pio_sel_d (pio_sel_d), | |
164 | .reset (reset), | |
165 | .cam_clk (clk), | |
166 | .cmp_enc (cmp_enc), | |
167 | .cmp_busy (cmp_busy), | |
168 | .cam_valid (cam_valid), | |
169 | .clr_cam (clr_cam), | |
170 | .c_scam_st (c_scam_st), | |
171 | .wt_data (wt_data), | |
172 | .wt_mask (wt_mask), | |
173 | .rd_data (rd_data), | |
174 | .rd_mask (rd_mask), | |
175 | .pio_rd_vld (pio_rd_vld), | |
176 | .c_pio_rw_st (c_pio_rw_st) | |
177 | ); | |
178 | ||
179 | endmodule |