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Initial commit of OpenSPARC T2 design and verification files.
[OpenSPARC-T2-DV] / design / sys / iop / niu / rtl / niu_scam_enc.v
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AT		 1// ========== Copyright Header Begin ==========================================
2//
3// OpenSPARC T2 Processor File: niu_scam_enc.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,
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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//
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32// have any questions.
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34// ========== Copyright Header End ============================================
35
36/**********************************************************
37***********************************************************
38
39 Project : Niu
40
41 File name : niu_scam_enc.v
42
43 Module(s) name : niu_scam_enc
44
45 Parent modules : niu_scam.v
46
47 Child modules : niu_scam_hit
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
66module niu_scam_enc (
67 match_array,
68 cmp_enc,
69 reset,
70 cam_clk,
71 cam_hit,
72 cam_haddr);
73
74input [127:0] match_array; // matched entries
75input cmp_enc; // do priority encode
76input reset;
77input cam_clk; // tcam internal clock
78output cam_hit; // cam has a match/hit
79output [6:0] cam_haddr; // cam's match/hit address
80
81reg cam_hit;
82reg [6:0] cam_haddr;
83
84reg [127:0] match_array_d;
85
86wire hit;
87reg [6:0] haddr;
88
89 assign hit = |(match_array[127:0]);
90
91// ------------------ priority encode the hit address ---------
92 always @(match_array_d)
93 casez (match_array_d) // synopsys parallel_case
94// 1 1 1 1 1 1 1
95// 6 5 4 3 2 1 0 9 8 7 6 5 4 3 2 1
96 ({124'h????_????_????_????_????_????_????_???,4'b???1} ): haddr=7'h00;
97 ({124'h????_????_????_????_????_????_????_???,4'b??10} ): haddr=7'h01;
98 ({124'h????_????_????_????_????_????_????_???,4'b?100} ): haddr=7'h02;
99 ({124'h????_????_????_????_????_????_????_???,4'b1000} ): haddr=7'h03;
100 ({120'h????_????_????_????_????_????_????_??, 4'b???1, 4'b0}): haddr=7'h04;
101 ({120'h????_????_????_????_????_????_????_??, 4'b??10, 4'b0}): haddr=7'h05;
102 ({120'h????_????_????_????_????_????_????_??, 4'b?100, 4'b0}): haddr=7'h06;
103 ({120'h????_????_????_????_????_????_????_??, 4'b1000, 4'b0}): haddr=7'h07;
104 ({116'h????_????_????_????_????_????_????_?, 4'b???1, 8'b0}): haddr=7'h08;
105 ({116'h????_????_????_????_????_????_????_?, 4'b??10, 8'b0}): haddr=7'h09;
106 ({116'h????_????_????_????_????_????_????_?, 4'b?100, 8'b0}): haddr=7'h0a;
107 ({116'h????_????_????_????_????_????_????_?, 4'b1000, 8'b0}): haddr=7'h0b;
108 ({112'h????_????_????_????_????_????_????, 4'b???1, 12'b0}): haddr=7'h0c;
109 ({112'h????_????_????_????_????_????_????, 4'b??10, 12'b0}): haddr=7'h0d;
110 ({112'h????_????_????_????_????_????_????, 4'b?100, 12'b0}): haddr=7'h0e;
111 ({112'h????_????_????_????_????_????_????, 4'b1000, 12'b0}): haddr=7'h0f;
112
113// 1 1 1 1 1 1 1
114// 6 5 4 3 2 1 0 9 8 7 6 5 4 3 2 1
115 ({108'h????_????_????_????_????_????_???, 4'b???1, 16'b0}): haddr=7'h10;
116 ({108'h????_????_????_????_????_????_???, 4'b??10, 16'b0}): haddr=7'h11;
117 ({108'h????_????_????_????_????_????_???, 4'b?100, 16'b0}): haddr=7'h12;
118 ({108'h????_????_????_????_????_????_???, 4'b1000, 16'b0}): haddr=7'h13;
119 ({104'h????_????_????_????_????_????_??, 4'b???1, 20'b0}): haddr=7'h14;
120 ({104'h????_????_????_????_????_????_??, 4'b??10, 20'b0}): haddr=7'h15;
121 ({104'h????_????_????_????_????_????_??, 4'b?100, 20'b0}): haddr=7'h16;
122 ({104'h????_????_????_????_????_????_??, 4'b1000, 20'b0}): haddr=7'h17;
123 ({100'h????_????_????_????_????_????_?, 4'b???1, 24'b0}): haddr=7'h18;
124 ({100'h????_????_????_????_????_????_?, 4'b??10, 24'b0}): haddr=7'h19;
125 ({100'h????_????_????_????_????_????_?, 4'b?100, 24'b0}): haddr=7'h1a;
126 ({100'h????_????_????_????_????_????_?, 4'b1000, 24'b0}): haddr=7'h1b;
127 ({096'h????_????_????_????_????_????, 4'b???1, 28'b0}): haddr=7'h1c;
128 ({096'h????_????_????_????_????_????, 4'b??10, 28'b0}): haddr=7'h1d;
129 ({096'h????_????_????_????_????_????, 4'b?100, 28'b0}): haddr=7'h1e;
130 ({096'h????_????_????_????_????_????, 4'b1000, 28'b0}): haddr=7'h1f;
131
132// 1 1 1 1 1 1 1
133// 6 5 4 3 2 1 0 9 8 7 6 5 4 3 2 1
134 ({092'h????_????_????_????_????_???, 4'b???1, 32'b0}): haddr=7'h20;
135 ({092'h????_????_????_????_????_???, 4'b??10, 32'b0}): haddr=7'h21;
136 ({092'h????_????_????_????_????_???, 4'b?100, 32'b0}): haddr=7'h22;
137 ({092'h????_????_????_????_????_???, 4'b1000, 32'b0}): haddr=7'h23;
138 ({088'h????_????_????_????_????_??, 4'b???1, 36'b0}): haddr=7'h24;
139 ({088'h????_????_????_????_????_??, 4'b??10, 36'b0}): haddr=7'h25;
140 ({088'h????_????_????_????_????_??, 4'b?100, 36'b0}): haddr=7'h26;
141 ({088'h????_????_????_????_????_??, 4'b1000, 36'b0}): haddr=7'h27;
142 ({084'h????_????_????_????_????_?, 4'b???1, 40'b0}): haddr=7'h28;
143 ({084'h????_????_????_????_????_?, 4'b??10, 40'b0}): haddr=7'h29;
144 ({084'h????_????_????_????_????_?, 4'b?100, 40'b0}): haddr=7'h2a;
145 ({084'h????_????_????_????_????_?, 4'b1000, 40'b0}): haddr=7'h2b;
146 ({080'h????_????_????_????_????, 4'b???1, 44'b0}): haddr=7'h2c;
147 ({080'h????_????_????_????_????, 4'b??10, 44'b0}): haddr=7'h2d;
148 ({080'h????_????_????_????_????, 4'b?100, 44'b0}): haddr=7'h2e;
149 ({080'h????_????_????_????_????, 4'b1000, 44'b0}): haddr=7'h2f;
150
151// 1 1 1 1 1 1 1
152// 6 5 4 3 2 1 0 9 8 7 6 5 4 3 2 1
153 ({076'h????_????_????_????_???, 4'b???1, 48'b0}): haddr=7'h30;
154 ({076'h????_????_????_????_???, 4'b??10, 48'b0}): haddr=7'h31;
155 ({076'h????_????_????_????_???, 4'b?100, 48'b0}): haddr=7'h32;
156 ({076'h????_????_????_????_???, 4'b1000, 48'b0}): haddr=7'h33;
157 ({072'h????_????_????_????_??, 4'b???1, 52'b0}): haddr=7'h34;
158 ({072'h????_????_????_????_??, 4'b??10, 52'b0}): haddr=7'h35;
159 ({072'h????_????_????_????_??, 4'b?100, 52'b0}): haddr=7'h36;
160 ({072'h????_????_????_????_??, 4'b1000, 52'b0}): haddr=7'h37;
161 ({068'h????_????_????_????_?, 4'b???1, 56'b0}): haddr=7'h38;
162 ({068'h????_????_????_????_?, 4'b??10, 56'b0}): haddr=7'h39;
163 ({068'h????_????_????_????_?, 4'b?100, 56'b0}): haddr=7'h3a;
164 ({068'h????_????_????_????_?, 4'b1000, 56'b0}): haddr=7'h3b;
165 ({064'h????_????_????_????, 4'b???1, 60'b0}): haddr=7'h3c;
166 ({064'h????_????_????_????, 4'b??10, 60'b0}): haddr=7'h3d;
167 ({064'h????_????_????_????, 4'b?100, 60'b0}): haddr=7'h3e;
168 ({064'h????_????_????_????, 4'b1000, 60'b0}): haddr=7'h3f;
169
170// 1 1 1 1 1 1 1
171// 6 5 4 3 2 1 0 9 8 7 6 5 4 3 2 1
172 ({060'h????_????_????_???, 4'b???1, 64'b0}): haddr=7'h40;
173 ({060'h????_????_????_???, 4'b??10, 64'b0}): haddr=7'h41;
174 ({060'h????_????_????_???, 4'b?100, 64'b0}): haddr=7'h42;
175 ({060'h????_????_????_???, 4'b1000, 64'b0}): haddr=7'h43;
176 ({056'h????_????_????_??, 4'b???1, 68'b0}): haddr=7'h44;
177 ({056'h????_????_????_??, 4'b??10, 68'b0}): haddr=7'h45;
178 ({056'h????_????_????_??, 4'b?100, 68'b0}): haddr=7'h46;
179 ({056'h????_????_????_??, 4'b1000, 68'b0}): haddr=7'h47;
180 ({052'h????_????_????_?, 4'b???1, 72'b0}): haddr=7'h48;
181 ({052'h????_????_????_?, 4'b??10, 72'b0}): haddr=7'h49;
182 ({052'h????_????_????_?, 4'b?100, 72'b0}): haddr=7'h4a;
183 ({052'h????_????_????_?, 4'b1000, 72'b0}): haddr=7'h4b;
184 ({048'h????_????_????, 4'b???1, 76'b0}): haddr=7'h4c;
185 ({048'h????_????_????, 4'b??10, 76'b0}): haddr=7'h4d;
186 ({048'h????_????_????, 4'b?100, 76'b0}): haddr=7'h4e;
187 ({048'h????_????_????, 4'b1000, 76'b0}): haddr=7'h4f;
188
189// 1 1 1 1 1 1 1
190// 6 5 4 3 2 1 0 9 8 7 6 5 4 3 2 1
191 ({044'h????_????_???, 4'b???1, 80'b0}): haddr=7'h50;
192 ({044'h????_????_???, 4'b??10, 80'b0}): haddr=7'h51;
193 ({044'h????_????_???, 4'b?100, 80'b0}): haddr=7'h52;
194 ({044'h????_????_???, 4'b1000, 80'b0}): haddr=7'h53;
195 ({040'h????_????_??, 4'b???1, 84'b0}): haddr=7'h54;
196 ({040'h????_????_??, 4'b??10, 84'b0}): haddr=7'h55;
197 ({040'h????_????_??, 4'b?100, 84'b0}): haddr=7'h56;
198 ({040'h????_????_??, 4'b1000, 84'b0}): haddr=7'h57;
199 ({036'h????_????_?, 4'b???1, 88'b0}): haddr=7'h58;
200 ({036'h????_????_?, 4'b??10, 88'b0}): haddr=7'h59;
201 ({036'h????_????_?, 4'b?100, 88'b0}): haddr=7'h5a;
202 ({036'h????_????_?, 4'b1000, 88'b0}): haddr=7'h5b;
203 ({032'h????_????, 4'b???1, 92'b0}): haddr=7'h5c;
204 ({032'h????_????, 4'b??10, 92'b0}): haddr=7'h5d;
205 ({032'h????_????, 4'b?100, 92'b0}): haddr=7'h5e;
206 ({032'h????_????, 4'b1000, 92'b0}): haddr=7'h5f;
207
208// 1 1 1 1 1 1 1
209// 6 5 4 3 2 1 0 9 8 7 6 5 4 3 2 1
210 ({028'h????_???, 4'b???1, 96'b0}): haddr=7'h60;
211 ({028'h????_???, 4'b??10, 96'b0}): haddr=7'h61;
212 ({028'h????_???, 4'b?100, 96'b0}): haddr=7'h62;
213 ({028'h????_???, 4'b1000, 96'b0}): haddr=7'h63;
214 ({024'h????_??, 4'b???1,100'b0}): haddr=7'h64;
215 ({024'h????_??, 4'b??10,100'b0}): haddr=7'h65;
216 ({024'h????_??, 4'b?100,100'b0}): haddr=7'h66;
217 ({024'h????_??, 4'b1000,100'b0}): haddr=7'h67;
218 ({020'h????_?, 4'b???1,104'b0}): haddr=7'h68;
219 ({020'h????_?, 4'b??10,104'b0}): haddr=7'h69;
220 ({020'h????_?, 4'b?100,104'b0}): haddr=7'h6a;
221 ({020'h????_?, 4'b1000,104'b0}): haddr=7'h6b;
222 ({016'h????, 4'b???1,108'b0}): haddr=7'h6c;
223 ({016'h????, 4'b??10,108'b0}): haddr=7'h6d;
224 ({016'h????, 4'b?100,108'b0}): haddr=7'h6e;
225 ({016'h????, 4'b1000,108'b0}): haddr=7'h6f;
226
227// 1 1 1 1 1 1 1
228// 6 5 4 3 2 1 0 9 8 7 6 5 4 3 2 1
229 ({012'h???, 4'b???1,112'b0}): haddr=7'h70;
230 ({012'h???, 4'b??10,112'b0}): haddr=7'h71;
231 ({012'h???, 4'b?100,112'b0}): haddr=7'h72;
232 ({012'h???, 4'b1000,112'b0}): haddr=7'h73;
233 ({008'h??, 4'b???1,116'b0}): haddr=7'h74;
234 ({008'h??, 4'b??10,116'b0}): haddr=7'h75;
235 ({008'h??, 4'b?100,116'b0}): haddr=7'h76;
236 ({008'h??, 4'b1000,116'b0}): haddr=7'h77;
237 ({004'h?, 4'b???1,120'b0}): haddr=7'h78;
238 ({004'h?, 4'b??10,120'b0}): haddr=7'h79;
239 ({004'h?, 4'b?100,120'b0}): haddr=7'h7a;
240 ({004'h?, 4'b1000,120'b0}): haddr=7'h7b;
241 ({ 4'b???1,124'b0}): haddr=7'h7c;
242 ({ 4'b??10,124'b0}): haddr=7'h7d;
243 ({ 4'b?100,124'b0}): haddr=7'h7e;
244 ({ 4'b1000,124'b0}): haddr=7'h7f;
245
246 default: haddr=7'd0;
247 endcase
248
249// ------------------ registers -------------------------------
250 always @(posedge cam_clk) begin
251 if (reset) begin
252 match_array_d <= 128'h0;
253 cam_hit <= 1'h0;
254 cam_haddr <= 7'h0;
255 end
256 else begin
257 match_array_d <= match_array[127:0];
258 cam_hit <= cmp_enc && hit;
259 cam_haddr <= {7{cmp_enc}} & haddr[6:0];
260 end
261 end
262
263endmodule
Full OpenSPARC design & verification tarball including full HDL.