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1 | // ========== Copyright Header Begin ========================================== |
2 | // | |
3 | // OpenSPARC T2 Processor File: dmu_cmu_tcm_pkrcd_q.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 | module dmu_cmu_tcm_pkrcd_q ( | |
36 | clk, | |
37 | rst_l, | |
38 | enq, | |
39 | rcd_in, | |
40 | deq, | |
41 | typ, | |
42 | len, | |
43 | dwbe, | |
44 | addr, | |
45 | sbd_tag, | |
46 | dptr, | |
47 | cntxt_num, | |
48 | pkseq_num, | |
49 | full, | |
50 | empty, | |
51 | overflow, | |
52 | underflow | |
53 | ); | |
54 | ||
55 | //************************************************ | |
56 | // PARAMETERS | |
57 | //************************************************ | |
58 | ||
59 | parameter DEPTH = 4; | |
60 | ||
61 | // Packet Record Field widths | |
62 | parameter PRTYP_WDTH = `FIRE_DLC_EPR_TYP_WDTH, // 7 | |
63 | PRLEN_WDTH = `FIRE_DLC_EPR_LEN_WDTH, //10 | |
64 | PRDWBE_WDTH = `FIRE_DLC_EPR_DWBE_WDTH, // 8 | |
65 | PRADDR_WDTH = `FIRE_DLC_EPR_ADDR_WDTH, //34 | |
66 | PRSBDTAG_WDTH = `FIRE_DLC_EPR_SBDTAG_WDTH, // 5 | |
67 | PRDPTR_WDTH = `FIRE_DLC_EPR_DPTR_WDTH, // 6 | |
68 | PRSEQNUM_WDTH = `FIRE_DLC_EPR_PKSEQNUM_WDTH, // 5 | |
69 | PRCNTXTNUM_WDTH = `FIRE_DLC_EPR_CNTXTNUM_WDTH; // 5 | |
70 | ||
71 | parameter PRCNTXTNUMLSB = `FIRE_DLC_EPR_CNTXTNUM_LSB, | |
72 | PRCNTXTNUMMSB = `FIRE_DLC_EPR_CNTXTNUM_MSB, | |
73 | PRSEQNUMLSB = `FIRE_DLC_EPR_PKSEQNUM_LSB, | |
74 | PRSEQNUMMSB = `FIRE_DLC_EPR_PKSEQNUM_MSB, | |
75 | PRDPTRLSB = `FIRE_DLC_EPR_DPTR_LSB, | |
76 | PRDPTRMSB = `FIRE_DLC_EPR_DPTR_MSB, | |
77 | PRSBDTAGLSB = `FIRE_DLC_EPR_SBDTAG_LSB, | |
78 | PRSBDTAGMSB = `FIRE_DLC_EPR_SBDTAG_MSB, | |
79 | PRADDRLSB = `FIRE_DLC_EPR_ADDR_LSB, | |
80 | PRADDRMSB = `FIRE_DLC_EPR_ADDR_MSB, | |
81 | PRDWBELSB = `FIRE_DLC_EPR_DWBE_LSB, | |
82 | PRDWBEMSB = `FIRE_DLC_EPR_DWBE_MSB, | |
83 | PRLENLSB = `FIRE_DLC_EPR_LEN_LSB, | |
84 | PRLENMSB = `FIRE_DLC_EPR_LEN_MSB, | |
85 | PRTYPLSB = `FIRE_DLC_EPR_TYP_LSB, | |
86 | PRTYPMSB = `FIRE_DLC_EPR_TYP_MSB; | |
87 | ||
88 | ||
89 | // parameter CL2CM_WDTH = `FIRE_DLC_EPR_REC_WDTH; //80 | |
90 | ||
91 | parameter EPRMSB = `FIRE_DLC_EPR_MSB; // CL2CM_WDTH -1; | |
92 | ||
93 | ||
94 | //************************************************ | |
95 | // PORTS | |
96 | //************************************************ | |
97 | ||
98 | input clk; // The input clock | |
99 | input rst_l; // The fifo rst_l | |
100 | ||
101 | input [EPRMSB :0] rcd_in; // Egress packet record in | |
102 | input enq; // enqueue to prcd_q | |
103 | input deq; // local dequeue for packet fifo | |
104 | ||
105 | output [PRTYP_WDTH -1 : 0] typ; | |
106 | output [PRLEN_WDTH -1 : 0] len; | |
107 | output [PRDWBE_WDTH -1 : 0] dwbe; | |
108 | output [PRADDR_WDTH -1 : 0] addr; | |
109 | output [PRSBDTAG_WDTH -1 : 0] sbd_tag; | |
110 | output [PRDPTR_WDTH -1 : 0] dptr; | |
111 | output [PRCNTXTNUM_WDTH -1 : 0] cntxt_num; | |
112 | output [PRSEQNUM_WDTH -1 : 0] pkseq_num; | |
113 | ||
114 | output full; // prcd_q is full | |
115 | output overflow; // prcd_q overflow | |
116 | output underflow; // prcd_q underflow | |
117 | output empty; // fifo empty exported | |
118 | ||
119 | //************************************************ | |
120 | // SIGNALS | |
121 | //************************************************ | |
122 | ||
123 | wire clk; | |
124 | wire rst_l; | |
125 | ||
126 | wire typ_full, typ_empty, typ_overflow, typ_underflow; | |
127 | wire len_empty, len_overflow, len_underflow; | |
128 | wire dwbe_empty, dwbe_overflow, dwbe_underflow; | |
129 | wire addr_empty, addr_overflow, addr_underflow; | |
130 | wire sbdtag_empty, sbdtag_overflow, sbdtag_underflow; | |
131 | wire dptr_empty, dptr_overflow, dptr_underflow; | |
132 | wire pkseqnum_empty, pkseqnum_overflow, pkseqnum_underflow; | |
133 | wire cntxtnum_empty, cntxtnum_overflow, cntxtnum_underflow; | |
134 | ||
135 | wire [PRTYP_WDTH -1 : 0] rcd_typ; | |
136 | wire [PRLEN_WDTH -1 : 0] rcd_len; | |
137 | wire [PRDWBE_WDTH -1 : 0] rcd_dwbe; | |
138 | wire [PRADDR_WDTH -1 : 0] rcd_addr; | |
139 | wire [PRSBDTAG_WDTH -1 : 0] rcd_sbdtag; | |
140 | wire [PRDPTR_WDTH -1 : 0] rcd_dptr; | |
141 | wire [PRSEQNUM_WDTH -1 : 0] rcd_pkseqnum; | |
142 | wire [PRCNTXTNUM_WDTH -1 : 0] rcd_cntxtnum; | |
143 | ||
144 | ||
145 | ||
146 | // Packet Record field assignments to PRM signals | |
147 | assign rcd_typ[PRTYP_WDTH -1 : 0] = rcd_in[PRTYPMSB : PRTYPLSB ]; | |
148 | assign rcd_len[PRLEN_WDTH -1 : 0] = rcd_in[PRLENMSB : PRLENLSB]; | |
149 | assign rcd_dwbe[PRDWBE_WDTH -1 : 0] = rcd_in[PRDWBEMSB : PRDWBELSB]; | |
150 | assign rcd_addr[PRADDR_WDTH -1 : 0] = rcd_in[PRADDRMSB : PRADDRLSB]; | |
151 | assign rcd_sbdtag[PRSBDTAG_WDTH -1 : 0] = rcd_in[PRSBDTAGMSB : PRSBDTAGLSB]; | |
152 | assign rcd_dptr[PRDPTR_WDTH -1 : 0] = rcd_in[PRDPTRMSB : PRDPTRLSB]; | |
153 | assign rcd_pkseqnum[PRSEQNUM_WDTH -1 : 0] = rcd_in[PRSEQNUMMSB : PRSEQNUMLSB]; | |
154 | assign rcd_cntxtnum[PRCNTXTNUM_WDTH -1 : 0] = rcd_in[PRCNTXTNUMMSB : PRCNTXTNUMLSB]; | |
155 | ||
156 | //************************************************ | |
157 | // Modules | |
158 | //************************************************ | |
159 | ||
160 | fire_dmc_common_srfifo #(PRTYP_WDTH, DEPTH) typ_srfifo ( | |
161 | .clk (clk), | |
162 | .rst_l (rst_l), | |
163 | .enq (enq), | |
164 | .data_in (rcd_typ), | |
165 | .deq (deq), | |
166 | .data_out (typ), | |
167 | .full (typ_full), | |
168 | .empty (typ_empty), | |
169 | .overflow(typ_overflow), | |
170 | .underflow(typ_underflow) | |
171 | ); | |
172 | ||
173 | fire_dmc_common_srfifo #(PRLEN_WDTH, DEPTH) len_srfifo ( | |
174 | .clk (clk), | |
175 | .rst_l (rst_l), | |
176 | .enq (enq), | |
177 | .data_in (rcd_len), | |
178 | .deq (deq), | |
179 | .data_out (len), | |
180 | .full (), | |
181 | .empty (len_empty), | |
182 | .overflow(len_overflow), | |
183 | .underflow(len_underflow) | |
184 | ); | |
185 | ||
186 | fire_dmc_common_srfifo #(PRDWBE_WDTH, DEPTH) dwbe_srfifo ( | |
187 | .clk (clk), | |
188 | .rst_l (rst_l), | |
189 | .enq (enq), | |
190 | .data_in (rcd_dwbe), | |
191 | .deq (deq), | |
192 | .data_out (dwbe), | |
193 | .full (), | |
194 | .empty (dwbe_empty), | |
195 | .overflow(dwbe_overflow), | |
196 | .underflow(dwbe_underflow) | |
197 | ); | |
198 | ||
199 | fire_dmc_common_srfifo #(PRADDR_WDTH, DEPTH) addr_srfifo ( | |
200 | .clk (clk), | |
201 | .rst_l (rst_l), | |
202 | .enq (enq), | |
203 | .data_in (rcd_addr), | |
204 | .deq (deq), | |
205 | .data_out (addr), | |
206 | .full (), | |
207 | .empty (addr_empty), | |
208 | .overflow(addr_overflow), | |
209 | .underflow(addr_underflow) | |
210 | ); | |
211 | ||
212 | fire_dmc_common_srfifo #(PRSBDTAG_WDTH, DEPTH) sbdtag_srfifo ( | |
213 | .clk (clk), | |
214 | .rst_l (rst_l), | |
215 | .enq (enq), | |
216 | .data_in (rcd_sbdtag), | |
217 | .deq (deq), | |
218 | .data_out (sbd_tag), | |
219 | .full (), | |
220 | .empty (sbdtag_empty), | |
221 | .overflow(sbdtag_overflow), | |
222 | .underflow(sbdtag_underflow) | |
223 | ); | |
224 | ||
225 | fire_dmc_common_srfifo #(PRDPTR_WDTH, DEPTH) dptr_srfifo ( | |
226 | .clk (clk), | |
227 | .rst_l (rst_l), | |
228 | .enq (enq), | |
229 | .data_in (rcd_dptr), | |
230 | .deq (deq), | |
231 | .data_out (dptr), | |
232 | .full (), | |
233 | .empty (dptr_empty), | |
234 | .overflow(dptr_overflow), | |
235 | .underflow(dptr_underflow) | |
236 | ); | |
237 | ||
238 | fire_dmc_common_srfifo #(PRSEQNUM_WDTH, DEPTH) pkseqnum_srfifo ( | |
239 | .clk (clk), | |
240 | .rst_l (rst_l), | |
241 | .enq (enq), | |
242 | .data_in (rcd_pkseqnum), | |
243 | .deq (deq), | |
244 | .data_out (pkseq_num), | |
245 | .full (), | |
246 | .empty (pkseqnum_empty), | |
247 | .overflow(pkseqnum_overflow), | |
248 | .underflow(pkseqnum_underflow) | |
249 | ); | |
250 | ||
251 | fire_dmc_common_srfifo #(PRCNTXTNUM_WDTH, DEPTH) cntxtnum_srfifo ( | |
252 | .clk (clk), | |
253 | .rst_l (rst_l), | |
254 | .enq (enq), | |
255 | .data_in (rcd_cntxtnum), | |
256 | .deq (deq), | |
257 | .data_out (cntxt_num), | |
258 | .full (), | |
259 | .empty (cntxtnum_empty), | |
260 | .overflow(cntxtnum_overflow), | |
261 | .underflow(cntxtnum_underflow) | |
262 | ); | |
263 | ||
264 | //assign full = (typ_full | len_full | dwbe_full | cntxtnum_full | | |
265 | // pkseqnum_full | addr_full | dptr_full | sbdtag_full); | |
266 | ||
267 | assign full = typ_full; // since all fifos are in lock step, single fifo full | |
268 | // can be exported | |
269 | ||
270 | assign overflow = (typ_overflow | len_overflow | dwbe_overflow | | |
271 | cntxtnum_overflow | pkseqnum_overflow | addr_overflow | | |
272 | dptr_overflow | sbdtag_overflow); | |
273 | ||
274 | assign underflow = (typ_underflow | len_underflow | dwbe_underflow | | |
275 | cntxtnum_underflow | pkseqnum_underflow | addr_underflow | | |
276 | dptr_underflow | sbdtag_underflow); | |
277 | ||
278 | assign empty = (typ_empty & len_empty & dwbe_empty & cntxtnum_empty & | |
279 | pkseqnum_empty & addr_empty & dptr_empty & sbdtag_empty); | |
280 | ||
281 | endmodule | |
282 |