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1 | // ========== Copyright Header Begin ========================================== |
2 | // | |
3 | // OpenSPARC T2 Processor File: niu_pio_macros.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 | /*%W% %G%*/ | |
36 | ||
37 | /***************************************************************** | |
38 | * | |
39 | * File Name : niu_pio_macros.v | |
40 | * Author Name : John Lo | |
41 | * Description : It contains macros. | |
42 | * | |
43 | * Parent Module: | |
44 | * Child Module: | |
45 | * Interface Mod: many. | |
46 | * Date Created : 3/15/04 | |
47 | * | |
48 | * Copyright (c) 2020, Sun Microsystems, Inc. | |
49 | * Sun Proprietary and Confidential | |
50 | * | |
51 | * Modification : | |
52 | * | |
53 | ****************************************************************/ | |
54 | ||
55 | ||
56 | //***************************** | |
57 | // Register xREG2 | |
58 | //***************************** | |
59 | module pio_xREG2 (clk,reset,reset_value,load,din,qout); | |
60 | ||
61 | parameter dwidth = 10; | |
62 | input clk; | |
63 | input reset; | |
64 | input [dwidth-1:0] reset_value; | |
65 | input load; | |
66 | input [dwidth-1:0] din; | |
67 | output [dwidth-1:0] qout; | |
68 | ||
69 | reg [dwidth-1:0] qout; | |
70 | ||
71 | ||
72 | always @ (posedge clk) | |
73 | if (reset) | |
74 | qout <= reset_value; | |
75 | else if (load) | |
76 | qout <= din; | |
77 | else | |
78 | qout <= qout; | |
79 | ||
80 | endmodule | |
81 | ||
82 | ||
83 | /*********************************** | |
84 | * 1 bit rst reset dff | |
85 | ***********************************/ | |
86 | module rffre (clk,reset,rst,en,d,q); | |
87 | ||
88 | input clk; | |
89 | input reset; | |
90 | input rst; | |
91 | input en; | |
92 | input d; | |
93 | output q; | |
94 | ||
95 | reg nx_q; | |
96 | wire q; | |
97 | ||
98 | always @ (rst or en or d or q) | |
99 | if (rst) | |
100 | nx_q = 0; | |
101 | else if (en) | |
102 | nx_q = d; | |
103 | else | |
104 | nx_q = q; | |
105 | ||
106 | dffr #(1) dffr (.clk(clk),.reset(reset),.d(nx_q),.q(q)); | |
107 | ||
108 | endmodule | |
109 | ||
110 | /*********************************** | |
111 | * 6 bit count down counter | |
112 | ***********************************/ | |
113 | module timer_6bit (clk,reset,rst,dec,en,d,q); | |
114 | ||
115 | input clk; | |
116 | input reset; | |
117 | input rst; | |
118 | input dec; | |
119 | input en; | |
120 | input [5:0] d; | |
121 | output [5:0] q; | |
122 | ||
123 | reg [5:0] nx_q; | |
124 | wire [5:0] q; | |
125 | ||
126 | always @ (rst or en or d or q or dec) | |
127 | if (rst) | |
128 | nx_q = 0; | |
129 | else if (en) | |
130 | nx_q = d; | |
131 | else if (~(|q)) // q == 0 | |
132 | nx_q = q; | |
133 | else if (dec) | |
134 | nx_q = q -1; | |
135 | else | |
136 | nx_q = q; | |
137 | ||
138 | dffr #(6) dffr (.clk(clk),.reset(reset),.d(nx_q),.q(q)); | |
139 | ||
140 | endmodule // timer_6bit | |
141 | ||
142 | /*********************************** | |
143 | * 20 bit resolution counter | |
144 | ***********************************/ | |
145 | module rtimer_20bit (clk,reset,dec_timer,en,d,q); | |
146 | ||
147 | input clk; | |
148 | input reset; | |
149 | input en; | |
150 | input [19:0] d; | |
151 | output dec_timer; | |
152 | output [19:0] q; | |
153 | ||
154 | ||
155 | reg [19:0] nx_cnt; | |
156 | wire [19:0] cnt; | |
157 | wire timer_pls; | |
158 | ||
159 | dffre #(20) resolution_dffre (.clk(clk),.reset(reset),.en(en),.d(d),.q(q)); | |
160 | ||
161 | // assign nx_cnt = cnt +1; | |
162 | always @ (q or cnt or timer_pls) | |
163 | if ((~(|q)) | timer_pls) // q == 0 | |
164 | nx_cnt = 0; | |
165 | else | |
166 | nx_cnt = cnt+1; | |
167 | ||
168 | dffr #(20) cnt_dffr (.clk(clk),.reset(reset),.d(nx_cnt),.q(cnt)); | |
169 | ||
170 | assign timer_pls = (cnt == q) ; | |
171 | ||
172 | df1 #(1) dec_timer_df1 (.clk(clk),.d(timer_pls),.q(dec_timer)); | |
173 | ||
174 | endmodule // timer_6bit | |
175 | ||
176 | ||
177 | ||
178 | ||
179 | module niu_pls_gen2 (clk,sig_in,lead,trail); | |
180 | input sig_in, clk; | |
181 | output lead,trail; | |
182 | ||
183 | wire sig_in, sig_out,lead,trail; | |
184 | df1 sig_out_df1 (.clk(clk),.d(sig_in),.q(sig_out)); | |
185 | assign lead = sig_in & ~sig_out; | |
186 | assign trail= ~sig_in & sig_out; | |
187 | ||
188 | endmodule | |
189 | ||
190 | ||
191 | ||
192 | ||
193 | module mux_r64to1(din,sel,dout); | |
194 | input [63:0] din; | |
195 | input [5:0] sel; | |
196 | output dout; | |
197 | ||
198 | wire [5:0] sel; | |
199 | reg dout; | |
200 | ||
201 | always @ (sel or din) | |
202 | casex(sel) // synopsys parallel_case full_case | |
203 | 6'd0 : dout = din[63] ; | |
204 | 6'd1 : dout = din[62] ; | |
205 | 6'd2 : dout = din[61] ; | |
206 | 6'd3 : dout = din[60] ; | |
207 | 6'd4 : dout = din[59] ; | |
208 | 6'd5 : dout = din[58] ; | |
209 | 6'd6 : dout = din[57] ; | |
210 | 6'd7 : dout = din[56] ; | |
211 | 6'd8 : dout = din[55] ; | |
212 | 6'd9 : dout = din[54] ; | |
213 | 6'd10 : dout = din[53] ; | |
214 | 6'd11 : dout = din[52] ; | |
215 | 6'd12 : dout = din[51] ; | |
216 | 6'd13 : dout = din[50] ; | |
217 | 6'd14 : dout = din[49] ; | |
218 | 6'd15 : dout = din[48] ; | |
219 | 6'd16 : dout = din[47] ; | |
220 | 6'd17 : dout = din[46] ; | |
221 | 6'd18 : dout = din[45] ; | |
222 | 6'd19 : dout = din[44] ; | |
223 | 6'd20 : dout = din[43] ; | |
224 | 6'd21 : dout = din[42] ; | |
225 | 6'd22 : dout = din[41] ; | |
226 | 6'd23 : dout = din[40] ; | |
227 | 6'd24 : dout = din[39] ; | |
228 | 6'd25 : dout = din[38] ; | |
229 | 6'd26 : dout = din[37] ; | |
230 | 6'd27 : dout = din[36] ; | |
231 | 6'd28 : dout = din[35] ; | |
232 | 6'd29 : dout = din[34] ; | |
233 | 6'd30 : dout = din[33] ; | |
234 | 6'd31 : dout = din[32] ; | |
235 | 6'd32 : dout = din[31] ; | |
236 | 6'd33 : dout = din[30] ; | |
237 | 6'd34 : dout = din[29] ; | |
238 | 6'd35 : dout = din[28] ; | |
239 | 6'd36 : dout = din[27] ; | |
240 | 6'd37 : dout = din[26] ; | |
241 | 6'd38 : dout = din[25] ; | |
242 | 6'd39 : dout = din[24] ; | |
243 | 6'd40 : dout = din[23] ; | |
244 | 6'd41 : dout = din[22] ; | |
245 | 6'd42 : dout = din[21] ; | |
246 | 6'd43 : dout = din[20] ; | |
247 | 6'd44 : dout = din[19] ; | |
248 | 6'd45 : dout = din[18] ; | |
249 | 6'd46 : dout = din[17] ; | |
250 | 6'd47 : dout = din[16] ; | |
251 | 6'd48 : dout = din[15] ; | |
252 | 6'd49 : dout = din[14] ; | |
253 | 6'd50 : dout = din[13] ; | |
254 | 6'd51 : dout = din[12] ; | |
255 | 6'd52 : dout = din[11] ; | |
256 | 6'd53 : dout = din[10] ; | |
257 | 6'd54 : dout = din[9] ; | |
258 | 6'd55 : dout = din[8] ; | |
259 | 6'd56 : dout = din[7] ; | |
260 | 6'd57 : dout = din[6] ; | |
261 | 6'd58 : dout = din[5] ; | |
262 | 6'd59 : dout = din[4] ; | |
263 | 6'd60 : dout = din[3] ; | |
264 | 6'd61 : dout = din[2] ; | |
265 | 6'd62 : dout = din[1] ; | |
266 | 6'd63 : dout = din[0] ; | |
267 | endcase | |
268 | ||
269 | endmodule // mux_r64to1 | |
270 | ||
271 | ||
272 | ||
273 | ||
274 | module niu_pio_mux_2to1_x144(dout, select, din1, din0); | |
275 | input select; | |
276 | input [143:0] din1, din0; | |
277 | output [143:0] dout; | |
278 | ||
279 | wire [143:0] din1, din0, dout; | |
280 | ||
281 | // Use the following code when IBM is NOT used as founder | |
282 | assign dout = select ? din1 : din0; | |
283 | ||
284 | ||
285 | endmodule // niu_pio_mux_2to1_x144 | |
286 | ||
287 | ||
288 |