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1 | // ========== Copyright Header Begin ========================================== |
2 | // | |
3 | // OpenSPARC T2 Processor File: niu_pio_virt_decode.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 | |
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32 | // have any questions. | |
33 | // | |
34 | // ========== Copyright Header End ============================================ | |
35 | /*%W% %G%*/ | |
36 | ||
37 | /***************************************************************** | |
38 | * | |
39 | * File Name : niu_pio_virt_decode.v | |
40 | * Author Name : Maya Suresh | |
41 | * Description : Virtualization Decoder | |
42 | * | |
43 | * Parent Module: niu_pio_regs.v | |
44 | * Child Module: | |
45 | * Interface Mod: | |
46 | * Date Created : 04/25/05 | |
47 | * | |
48 | * Copyright (c) 2020, Sun Microsystems, Inc. | |
49 | * Sun Proprietary and Confidential | |
50 | * | |
51 | * Modification : | |
52 | * | |
53 | ****************************************************************/ | |
54 | ||
55 | module niu_pio_virt_decode ( | |
56 | // Outputs | |
57 | virt_addr, pio_virt_sel_ok, fflp_virt_sel_ok, | |
58 | dma_virt_sel_ok, | |
59 | // Inputs | |
60 | addr, fc0_v, fc1_v, fc2_v, fc3_v | |
61 | ); | |
62 | ||
63 | output [26:0] virt_addr ; | |
64 | output pio_virt_sel_ok ; | |
65 | output fflp_virt_sel_ok ; | |
66 | output dma_virt_sel_ok; | |
67 | ||
68 | input [26:0] addr ; | |
69 | input fc0_v ; | |
70 | input fc1_v ; | |
71 | input fc2_v ; | |
72 | input fc3_v ; | |
73 | ||
74 | reg [26:0] virt_addr ; | |
75 | reg pio_virt_sel_ok ; | |
76 | reg fflp_virt_sel_ok ; | |
77 | reg dma_virt_sel_ok; | |
78 | ||
79 | always @ (addr or | |
80 | fc0_v or | |
81 | fc1_v or | |
82 | fc2_v or | |
83 | fc3_v ) | |
84 | begin | |
85 | virt_addr[26:0] = 27'b0; | |
86 | pio_virt_sel_ok = 1'b0 ; | |
87 | fflp_virt_sel_ok = 1'b0 ; | |
88 | dma_virt_sel_ok = 1'b0 ; | |
89 | ||
90 | // Function Zero Virtualization | |
91 | if (fc0_v) // Function Zero Virtualization Decode | |
92 | begin | |
93 | ||
94 | // Code for DMA Virtualization | |
95 | if (addr[23:13] == 11'b0000_0000_000) | |
96 | begin | |
97 | virt_addr[26:0] = addr[26:0]; | |
98 | dma_virt_sel_ok = 1'b1 ; | |
99 | end | |
100 | if (addr[23:13] == 11'b0000_0000_010) | |
101 | begin | |
102 | virt_addr[26:0] = addr[26:0]; | |
103 | dma_virt_sel_ok = 1'b1 ; | |
104 | end | |
105 | // END | |
106 | ||
107 | if (addr[15:8] == 8'b0010_0000) | |
108 | begin | |
109 | virt_addr[23:0] = {8'b1000_0000,addr[7:5],8'b0,addr[4:0]}; | |
110 | virt_addr[26:24]= addr[26:24]; | |
111 | pio_virt_sel_ok = 1'b1 ; | |
112 | end | |
113 | ||
114 | if (addr[15:8] == 8'b0110_0000) | |
115 | begin | |
116 | virt_addr[23:0] = {8'b1000_0001,addr[7:5],8'b0,addr[4:0]}; | |
117 | virt_addr[26:24]= addr[26:24]; | |
118 | pio_virt_sel_ok = 1'b1 ; | |
119 | end | |
120 | ||
121 | if (addr[15:0] == 16'b0010_0001_0000_0000) | |
122 | begin | |
123 | virt_addr[23:0] = {4'b0011,20'b0}; | |
124 | virt_addr[26:24]= addr[26:24]; | |
125 | fflp_virt_sel_ok = 1'b1 ; | |
126 | end | |
127 | if (addr[15:0] == 16'b0010_0001_0000_1000) | |
128 | begin | |
129 | virt_addr[23:0] = {4'b0011,16'b0,4'b1000}; | |
130 | virt_addr[26:24]= addr[26:24]; | |
131 | fflp_virt_sel_ok = 1'b1 ; | |
132 | end | |
133 | if (addr[15:0] == 16'b0010_0001_0001_0000) | |
134 | begin | |
135 | virt_addr[23:0] = {4'b0011,12'b0,4'b0001,4'b0000}; | |
136 | virt_addr[26:24]= addr[26:24]; | |
137 | fflp_virt_sel_ok = 1'b1 ; | |
138 | end | |
139 | ||
140 | if (addr[15:0] == 16'b0110_0001_0000_0000) | |
141 | begin | |
142 | virt_addr[23:0] = {4'b0011,4'b0000,4'b0010,12'b0}; | |
143 | virt_addr[26:24]= addr[26:24]; | |
144 | fflp_virt_sel_ok = 1'b1 ; | |
145 | end | |
146 | if (addr[15:0] == 16'b0110_0001_0000_1000) | |
147 | begin | |
148 | virt_addr[23:0] = {4'b0011,4'b0000,4'b0010,8'b0,4'b1000}; | |
149 | virt_addr[26:24]= addr[26:24]; | |
150 | fflp_virt_sel_ok = 1'b1 ; | |
151 | end | |
152 | if (addr[15:0] == 16'b0110_0001_0001_0000) | |
153 | begin | |
154 | fflp_virt_sel_ok = 1'b1 ; | |
155 | virt_addr[23:0] = {4'b0011,4'b0000,4'b0010,4'b0000,4'b0001,4'b0000}; | |
156 | virt_addr[26:24]= addr[26:24]; | |
157 | end | |
158 | end | |
159 | ||
160 | // Function One Virtualization | |
161 | if (fc1_v) // Function Zero Virtualization Decode | |
162 | begin | |
163 | ||
164 | // Code for DMA Virtualization | |
165 | if (addr[23:13] == 11'b0000_0000_000) | |
166 | begin | |
167 | virt_addr[26:0] = addr[26:0]; | |
168 | dma_virt_sel_ok = 1'b1 ; | |
169 | end | |
170 | if (addr[23:13] == 11'b0000_0000_010) | |
171 | begin | |
172 | virt_addr[26:0] = addr[26:0]; | |
173 | dma_virt_sel_ok = 1'b1 ; | |
174 | end | |
175 | // END | |
176 | ||
177 | if (addr[15:8] == 8'b0010_0000) | |
178 | begin | |
179 | virt_addr[23:0] = {8'b1000_0010,addr[7:5],8'b0,addr[4:0]}; | |
180 | virt_addr[26:24]= addr[26:24]; | |
181 | pio_virt_sel_ok = 1'b1 ; | |
182 | end | |
183 | if (addr[15:8] == 8'b0110_0000) | |
184 | begin | |
185 | virt_addr[23:0] = {8'b1000_0011,addr[7:5],8'b0,addr[4:0]}; | |
186 | virt_addr[26:24]= addr[26:24]; | |
187 | pio_virt_sel_ok = 1'b1 ; | |
188 | end | |
189 | ||
190 | if (addr[15:0] == 16'b0010_0001_0000_0000) | |
191 | begin | |
192 | virt_addr[23:0] = {4'b0011,4'b0000,4'b0100,8'b0,4'b0000}; | |
193 | virt_addr[26:24]= addr[26:24]; | |
194 | fflp_virt_sel_ok = 1'b1 ; | |
195 | end | |
196 | if (addr[15:0] == 16'b0010_0001_0000_1000) | |
197 | begin | |
198 | virt_addr[23:0] = {4'b0011,4'b0000,4'b0100,8'b0,4'b1000}; | |
199 | virt_addr[26:24]= addr[26:24]; | |
200 | fflp_virt_sel_ok = 1'b1 ; | |
201 | end | |
202 | if (addr[15:0] == 16'b0010_0001_0001_0000) | |
203 | begin | |
204 | virt_addr[23:0] = {4'b0011,4'b0000,4'b0100,4'b0,4'b0001,4'b0000}; | |
205 | virt_addr[26:24]= addr[26:24]; | |
206 | fflp_virt_sel_ok = 1'b1 ; | |
207 | end | |
208 | ||
209 | if (addr[15:0] == 16'b0110_0001_0000_0000) | |
210 | begin | |
211 | virt_addr[23:0] = {4'b0011,4'b0000,4'b0110,8'b0,4'b0000}; | |
212 | virt_addr[26:24]= addr[26:24]; | |
213 | fflp_virt_sel_ok = 1'b1 ; | |
214 | end | |
215 | if (addr[15:0] == 16'b0110_0001_0000_1000) | |
216 | begin | |
217 | virt_addr[23:0] = {4'b0011,4'b0000,4'b0110,8'b0,4'b1000}; | |
218 | virt_addr[26:24]= addr[26:24]; | |
219 | fflp_virt_sel_ok = 1'b1 ; | |
220 | end | |
221 | if (addr[15:0] == 16'b0110_0001_0001_0000) | |
222 | begin | |
223 | virt_addr[23:0] = {4'b0011,4'b0000,4'b0110,4'b0,4'b0001,4'b0000}; | |
224 | virt_addr[26:24]= addr[26:24]; | |
225 | fflp_virt_sel_ok = 1'b1 ; | |
226 | end | |
227 | end | |
228 | ||
229 | // Function Two Virtualization | |
230 | if (fc2_v) // Function Zero Virtualization Decode | |
231 | begin | |
232 | ||
233 | // Code for DMA Virtualization | |
234 | if (addr[23:13] == 11'b0000_0000_000) | |
235 | begin | |
236 | virt_addr[26:0] = addr[26:0]; | |
237 | dma_virt_sel_ok = 1'b1 ; | |
238 | end | |
239 | if (addr[23:13] == 11'b0000_0000_010) | |
240 | begin | |
241 | virt_addr[26:0] = addr[26:0]; | |
242 | dma_virt_sel_ok = 1'b1 ; | |
243 | end | |
244 | // END | |
245 | ||
246 | if (addr[15:8] == 8'b0010_0000) | |
247 | begin | |
248 | virt_addr[23:0] = {8'b1000_0100,addr[7:5],8'b0,addr[4:0]}; | |
249 | virt_addr[26:24]= addr[26:24]; | |
250 | pio_virt_sel_ok = 1'b1 ; | |
251 | end | |
252 | if (addr[15:8] == 8'b0110_0000) | |
253 | begin | |
254 | virt_addr[23:0] = {8'b1000_0101,addr[7:5],8'b0,addr[4:0]}; | |
255 | virt_addr[26:24]= addr[26:24]; | |
256 | pio_virt_sel_ok = 1'b1 ; | |
257 | end | |
258 | ||
259 | if (addr[15:0] == 16'b0010_0001_0000_0000) | |
260 | begin | |
261 | virt_addr[23:0] = {4'b0011,4'b0000,4'b1000,8'b0,4'b0000}; | |
262 | virt_addr[26:24]= addr[26:24]; | |
263 | fflp_virt_sel_ok = 1'b1 ; | |
264 | end | |
265 | if (addr[15:0] == 16'b0010_0001_0000_1000) | |
266 | begin | |
267 | virt_addr[23:0] = {4'b0011,4'b0000,4'b1000,8'b0,4'b1000}; | |
268 | virt_addr[26:24]= addr[26:24]; | |
269 | fflp_virt_sel_ok = 1'b1 ; | |
270 | end | |
271 | if (addr[15:0] == 16'b0010_0001_0001_0000) | |
272 | begin | |
273 | virt_addr[23:0] = {4'b0011,4'b0000,4'b1000,4'b0,4'b0001,4'b0000}; | |
274 | virt_addr[26:24]= addr[26:24]; | |
275 | fflp_virt_sel_ok = 1'b1 ; | |
276 | end | |
277 | ||
278 | if (addr[15:0] == 16'b0110_0001_0000_0000) | |
279 | begin | |
280 | virt_addr[23:0] = {4'b0011,4'b0000,4'b1010,8'b0,4'b0000}; | |
281 | virt_addr[26:24]= addr[26:24]; | |
282 | fflp_virt_sel_ok = 1'b1 ; | |
283 | end | |
284 | if (addr[15:0] == 16'b0110_0001_0000_1000) | |
285 | begin | |
286 | virt_addr[23:0] = {4'b0011,4'b0000,4'b1010,8'b0,4'b1000}; | |
287 | virt_addr[26:24]= addr[26:24]; | |
288 | fflp_virt_sel_ok = 1'b1 ; | |
289 | end | |
290 | if (addr[15:0] == 16'b0110_0001_0001_0000) | |
291 | begin | |
292 | fflp_virt_sel_ok = 1'b1 ; | |
293 | virt_addr[26:24]= addr[26:24]; | |
294 | virt_addr[23:0] = {4'b0011,4'b0000,4'b1010,4'b0,4'b0001,4'b0000}; | |
295 | end | |
296 | end | |
297 | ||
298 | // Function Three Virtualization | |
299 | if (fc3_v) // Function Zero Virtualization Decode | |
300 | begin | |
301 | ||
302 | // Code for DMA Virtualization | |
303 | if (addr[23:13] == 11'b0000_0000_000) | |
304 | begin | |
305 | virt_addr[26:0] = addr[26:0]; | |
306 | dma_virt_sel_ok = 1'b1 ; | |
307 | end | |
308 | if (addr[23:13] == 11'b0000_0000_010) | |
309 | begin | |
310 | virt_addr[26:0] = addr[26:0]; | |
311 | dma_virt_sel_ok = 1'b1 ; | |
312 | end | |
313 | // END | |
314 | ||
315 | if (addr[15:8] == 8'b0010_0000) | |
316 | begin | |
317 | virt_addr[23:0] = {8'b1000_0110,addr[7:5],8'b0,addr[4:0]}; | |
318 | virt_addr[26:24]= addr[26:24]; | |
319 | pio_virt_sel_ok = 1'b1 ; | |
320 | end | |
321 | if (addr[15:8] == 8'b0110_0000) | |
322 | begin | |
323 | virt_addr[23:0] = {8'b1000_0111,addr[7:5],8'b0,addr[4:0]}; | |
324 | virt_addr[26:24]= addr[26:24]; | |
325 | pio_virt_sel_ok = 1'b1 ; | |
326 | end | |
327 | ||
328 | if (addr[15:0] == 16'b0010_0001_0000_0000) | |
329 | begin | |
330 | virt_addr[23:0] = {4'b0011,4'b0000,4'b1100,8'b0,4'b0000}; | |
331 | virt_addr[26:24]= addr[26:24]; | |
332 | fflp_virt_sel_ok = 1'b1 ; | |
333 | end | |
334 | if (addr[15:0] == 16'b0010_0001_0000_1000) | |
335 | begin | |
336 | virt_addr[23:0] = {4'b0011,4'b0000,4'b1100,8'b0,4'b1000}; | |
337 | virt_addr[26:24]= addr[26:24]; | |
338 | fflp_virt_sel_ok = 1'b1 ; | |
339 | end | |
340 | if (addr[15:0] == 16'b0010_0001_0001_0000) | |
341 | begin | |
342 | virt_addr[23:0] = {4'b0011,4'b0000,4'b1100,4'b0,4'b0001,4'b0000}; | |
343 | virt_addr[26:24]= addr[26:24]; | |
344 | fflp_virt_sel_ok = 1'b1 ; | |
345 | end | |
346 | ||
347 | if (addr[15:0] == 16'b0110_0001_0000_0000) | |
348 | begin | |
349 | virt_addr[23:0] = {4'b0011,4'b0000,4'b1110,8'b0,4'b0000}; | |
350 | virt_addr[26:24]= addr[26:24]; | |
351 | fflp_virt_sel_ok = 1'b1 ; | |
352 | end | |
353 | if (addr[15:0] == 16'b0110_0001_0000_1000) | |
354 | begin | |
355 | virt_addr[23:0] = {4'b0011,4'b0000,4'b1110,8'b0,4'b1000}; | |
356 | virt_addr[26:24]= addr[26:24]; | |
357 | fflp_virt_sel_ok = 1'b1 ; | |
358 | end | |
359 | if (addr[15:0] == 16'b0110_0001_0001_0000) | |
360 | begin | |
361 | fflp_virt_sel_ok = 1'b1 ; | |
362 | virt_addr[26:24]= addr[26:24]; | |
363 | virt_addr[23:0] = {4'b0011,4'b0000,4'b1110,4'b0,4'b0001,4'b0000}; | |
364 | end | |
365 | end | |
366 | end | |
367 | ||
368 | endmodule // niu_pio_virt_decode | |
369 |