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1 | // ========== Copyright Header Begin ========================================== |
2 | // | |
3 | // OpenSPARC T2 Processor File: niu_smx_sm_resp_cmdlaunch.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 | module niu_smx_sm_resp_cmdlaunch( | |
37 | /*AUTOARG*/ | |
38 | // Outputs | |
39 | smx_dmc_rdy, smx_dmc_cmd, smx_dmc_cmd_status, smx_dmc_addr, | |
40 | smx_dmc_len, smx_dmc_xid, smx_dmc_port, smx_dmc_dma, | |
41 | smx_dmc_client, smx_dmc_ack_rdy, smx_dmc_ack_cmd, | |
42 | smx_dmc_ack_cmd_status, | |
43 | smx_dmc_ack_xid, | |
44 | smx_dmc_ack_dma, | |
45 | smx_dmc_ack_client, rst_procflag, dvflag, | |
46 | dvflag_with_data, dvflag_line_en, dvflag_sop_pos, dvflag_eop_pos, | |
47 | dvflag_sop_byte_en, dvflag_eop_byte_en, dvflag_client, | |
48 | dvflag_xcomp, dvflag_status, early_dvflag, early_dvflag_with_data, | |
49 | early_dvflag_line_en, early_dvflag_sop_pos, early_dvflag_eop_pos, | |
50 | early_dvflag_sop_byte_en, early_dvflag_eop_byte_en, | |
51 | early_dvflag_client, early_dvflag_xcomp, early_dvflag_status, | |
52 | cmdl_tohdl_ack, cmdl_cs, | |
53 | // Inputs | |
54 | clk, reset_l, dmc_smx_accept, dmc_smx_ack_accept, procflag, | |
55 | procflag_cmd, procflag_addr, procflag_xid, | |
56 | procflag_port, procflag_dma, procflag_client, | |
57 | procflag_sop_line_en, procflag_eop_line_en, procflag_sop_byte_en, | |
58 | procflag_eop_byte_en, procflag_err, procflag_rd, | |
59 | procflag_with_data, procflag_xcomp, procflag_sop, procflag_eop, | |
60 | rst_dvflag, dv_idle, tohdl_cmdl_req, tohdl_cmdl_cmd, | |
61 | tohdl_cmdl_addr, tohdl_cmdl_len, tohdl_cmdl_xid, tohdl_cmdl_port, | |
62 | tohdl_cmdl_dma, tohdl_cmdl_client, tid_dirty_rdata_bus | |
63 | ); | |
64 | ||
65 | input clk; | |
66 | input reset_l; | |
67 | ||
68 | // dmc if | |
69 | output smx_dmc_rdy; | |
70 | output [7:0] smx_dmc_cmd; | |
71 | output [3:0] smx_dmc_cmd_status; | |
72 | output [63:0] smx_dmc_addr; | |
73 | output [13:0] smx_dmc_len; | |
74 | output [5:0] smx_dmc_xid; | |
75 | output [1:0] smx_dmc_port; | |
76 | output [4:0] smx_dmc_dma; | |
77 | output [7:0] smx_dmc_client; | |
78 | input [7:0] dmc_smx_accept; | |
79 | ||
80 | // ack if | |
81 | output smx_dmc_ack_rdy; | |
82 | output [7:0] smx_dmc_ack_cmd; | |
83 | output [3:0] smx_dmc_ack_cmd_status; | |
84 | // output [63:0] smx_dmc_ack_addr; | |
85 | // output [13:0] smx_dmc_ack_len; | |
86 | output [5:0] smx_dmc_ack_xid; | |
87 | // output [1:0] smx_dmc_ack_port; | |
88 | output [4:0] smx_dmc_ack_dma; | |
89 | output [7:0] smx_dmc_ack_client; | |
90 | input [7:0] dmc_smx_ack_accept; | |
91 | ||
92 | // cmdproc if | |
93 | input procflag; | |
94 | input [7:0] procflag_cmd; | |
95 | input [63:0] procflag_addr; | |
96 | input [5:0] procflag_xid; | |
97 | input [1:0] procflag_port; | |
98 | input [4:0] procflag_dma; | |
99 | input [7:0] procflag_client; | |
100 | input [3:0] procflag_sop_line_en; | |
101 | input [3:0] procflag_eop_line_en; | |
102 | input [3:0] procflag_sop_byte_en; | |
103 | input [3:0] procflag_eop_byte_en; | |
104 | input [2:0] procflag_err; | |
105 | input procflag_rd; // rd= 1, wr= 0 | |
106 | input procflag_with_data; //1- data, 0- no data | |
107 | input procflag_xcomp; | |
108 | input procflag_sop; | |
109 | input procflag_eop; | |
110 | output rst_procflag; | |
111 | ||
112 | // output cmdlaunch_idle; // in case need save 1 cycle at start | |
113 | // input early_procflag; | |
114 | // input [150:0] early_procflag_data; // not use for now | |
115 | ||
116 | ||
117 | // dv if | |
118 | output dvflag; | |
119 | output [1:0] dvflag_with_data; // 1= rd (data,dv also sio dq) , | |
120 | // 0= wr/rderr (sio dq only) | |
121 | output [3:0] dvflag_line_en; | |
122 | output [3:0] dvflag_sop_pos; // indicate first data line position | |
123 | output [3:0] dvflag_eop_pos; // indicate last data line position | |
124 | output [15:0] dvflag_sop_byte_en; // use this for 'first' data line | |
125 | output [15:0] dvflag_eop_byte_en; // use this for 'last' data line | |
126 | output [7:0] dvflag_client; | |
127 | output [3:0] dvflag_xcomp; | |
128 | output [3:0] dvflag_status; | |
129 | input rst_dvflag; | |
130 | ||
131 | input dv_idle; // dv in idle state | |
132 | output early_dvflag; // dv needs to be in idle to catch this pulse | |
133 | // and dvflag not set | |
134 | output [1:0] early_dvflag_with_data; // 1= rd (data,dv also sio dq) , | |
135 | // 0= wr/rderr (sio dq only) | |
136 | output [3:0] early_dvflag_line_en; | |
137 | output [3:0] early_dvflag_sop_pos; // indicate first data line position | |
138 | output [3:0] early_dvflag_eop_pos; // indicate last data line position | |
139 | output [15:0] early_dvflag_sop_byte_en; // use this for 'first' data line | |
140 | output [15:0] early_dvflag_eop_byte_en; // use this for 'last' data line | |
141 | output [7:0] early_dvflag_client; | |
142 | output [3:0] early_dvflag_xcomp; | |
143 | output [3:0] early_dvflag_status; | |
144 | ||
145 | // TO handler if | |
146 | input tohdl_cmdl_req; | |
147 | input [7:0] tohdl_cmdl_cmd; | |
148 | input [63:0] tohdl_cmdl_addr; | |
149 | input [13:0] tohdl_cmdl_len; | |
150 | input [5:0] tohdl_cmdl_xid; | |
151 | input [1:0] tohdl_cmdl_port; | |
152 | input [4:0] tohdl_cmdl_dma; | |
153 | input [7:0] tohdl_cmdl_client; | |
154 | output cmdl_tohdl_ack; | |
155 | ||
156 | output [2:0] cmdl_cs; | |
157 | ||
158 | // status i/f | |
159 | input [63:0] tid_dirty_rdata_bus; | |
160 | ||
161 | function [15:0] decode_eop_16b_byte_en_little; // B15,B14..,B1,B0 | |
162 | input [3:0] offset; | |
163 | ||
164 | reg [15:0] byte_en; | |
165 | begin | |
166 | case(offset) | |
167 | 4'h0: byte_en= 16'hffff; | |
168 | 4'h1: byte_en= 16'h1; | |
169 | 4'h2: byte_en= 16'h3; | |
170 | 4'h3: byte_en= 16'h7; | |
171 | 4'h4: byte_en= 16'hf; | |
172 | 4'h5: byte_en= 16'h1f; | |
173 | 4'h6: byte_en= 16'h3f; | |
174 | 4'h7: byte_en= 16'h7f; | |
175 | 4'h8: byte_en= 16'hff; | |
176 | 4'h9: byte_en= 16'h1ff; | |
177 | 4'ha: byte_en= 16'h3ff; | |
178 | 4'hb: byte_en= 16'h7ff; | |
179 | 4'hc: byte_en= 16'hfff; | |
180 | 4'hd: byte_en= 16'h1fff; | |
181 | 4'he: byte_en= 16'h3fff; | |
182 | 4'hf: byte_en= 16'h7fff; | |
183 | endcase | |
184 | decode_eop_16b_byte_en_little= byte_en; | |
185 | end | |
186 | endfunction | |
187 | ||
188 | function [15:0] decode_sop_16b_byte_en_little; // B15,B14..,B1,B0 | |
189 | input [3:0] offset; | |
190 | ||
191 | reg [15:0] byte_en; | |
192 | begin | |
193 | case(offset) | |
194 | 4'h0: byte_en= 16'hffff; | |
195 | 4'h1: byte_en= 16'hfffe; | |
196 | 4'h2: byte_en= 16'hfffc; | |
197 | 4'h3: byte_en= 16'hfff8; | |
198 | 4'h4: byte_en= 16'hfff0; | |
199 | 4'h5: byte_en= 16'hffe0; | |
200 | 4'h6: byte_en= 16'hffc0; | |
201 | 4'h7: byte_en= 16'hff80; | |
202 | 4'h8: byte_en= 16'hff00; | |
203 | 4'h9: byte_en= 16'hfe00; | |
204 | 4'ha: byte_en= 16'hfc00; | |
205 | 4'hb: byte_en= 16'hf800; | |
206 | 4'hc: byte_en= 16'hf000; | |
207 | 4'hd: byte_en= 16'he000; | |
208 | 4'he: byte_en= 16'hc000; | |
209 | 4'hf: byte_en= 16'h8000; | |
210 | endcase | |
211 | decode_sop_16b_byte_en_little= byte_en; | |
212 | end | |
213 | endfunction | |
214 | ||
215 | ||
216 | /* | |
217 | function [15:0] decode_eop_16b_byte_en_big; // B0,B1...,B14,B15 | |
218 | input [3:0] offset; | |
219 | ||
220 | reg [15:0] byte_en; | |
221 | ||
222 | begin | |
223 | case(offset) | |
224 | 4'h0: byte_en= 16'hffff; | |
225 | 4'h1: byte_en= 16'h8000; | |
226 | 4'h2: byte_en= 16'hc000; | |
227 | 4'h3: byte_en= 16'he000; | |
228 | 4'h4: byte_en= 16'hf000; | |
229 | 4'h5: byte_en= 16'hf800; | |
230 | 4'h6: byte_en= 16'hfc00; | |
231 | 4'h7: byte_en= 16'hfe00; | |
232 | 4'h8: byte_en= 16'hff00; | |
233 | 4'h9: byte_en= 16'hff80; | |
234 | 4'ha: byte_en= 16'hffc0; | |
235 | 4'hb: byte_en= 16'hffe0; | |
236 | 4'hc: byte_en= 16'hfff0; | |
237 | 4'hd: byte_en= 16'hfff8; | |
238 | 4'he: byte_en= 16'hfffc; | |
239 | 4'hf: byte_en= 16'hfffe; | |
240 | endcase | |
241 | decode_eop_16b_byte_en_big= byte_en; | |
242 | end | |
243 | endfunction | |
244 | ||
245 | function [15:0] decode_sop_16b_byte_en_big; // B0,B1...,B14,B15 | |
246 | input [3:0] offset; | |
247 | ||
248 | reg [15:0] byte_en; | |
249 | ||
250 | begin | |
251 | case(offset) | |
252 | 4'h0: byte_en= 16'hffff; | |
253 | 4'h1: byte_en= 16'h7fff; | |
254 | 4'h2: byte_en= 16'h3fff; | |
255 | 4'h3: byte_en= 16'h1fff; | |
256 | 4'h4: byte_en= 16'h0fff; | |
257 | 4'h5: byte_en= 16'h07ff; | |
258 | 4'h6: byte_en= 16'h03ff; | |
259 | 4'h7: byte_en= 16'h01ff; | |
260 | 4'h8: byte_en= 16'h00ff; | |
261 | 4'h9: byte_en= 16'h007f; | |
262 | 4'ha: byte_en= 16'h003f; | |
263 | 4'hb: byte_en= 16'h001f; | |
264 | 4'hc: byte_en= 16'h000f; | |
265 | 4'hd: byte_en= 16'h0007; | |
266 | 4'he: byte_en= 16'h0003; | |
267 | 4'hf: byte_en= 16'h0001; | |
268 | endcase | |
269 | decode_sop_16b_byte_en_big= byte_en; | |
270 | end | |
271 | endfunction | |
272 | */ | |
273 | ||
274 | parameter cmdl_s0= 3'h0, | |
275 | cmdl_s1= 3'h1, | |
276 | cmdl_s2= 3'h2, | |
277 | cmdl_s3= 3'h3, | |
278 | cmdl_s4= 3'h4; | |
279 | ||
280 | ||
281 | wire client_accept_n= (|(dmc_smx_accept & smx_dmc_client)) | | |
282 | (|(dmc_smx_ack_accept & smx_dmc_ack_client)); | |
283 | ||
284 | reg early_dvflag_n; | |
285 | wire early_dvflag= early_dvflag_n; | |
286 | ||
287 | reg rst_procflag_n; | |
288 | wire rst_procflag= rst_procflag_n; | |
289 | ||
290 | ||
291 | reg smx_dmc_rdy_n, smx_dmc_rdy ; | |
292 | reg smx_dmc_ack_rdy_n, smx_dmc_ack_rdy ; | |
293 | reg ld_dmc_n; | |
294 | reg set_dvflag_n; | |
295 | reg dvflag; | |
296 | reg [2:0] cmdl_ns, cmdl_cs; | |
297 | wire cmdl_req_n= procflag && !dvflag; | |
298 | reg rst_serve_tohdl_n; | |
299 | reg cmdl_tohdl_ack_n; | |
300 | wire cmdl_tohdl_ack= cmdl_tohdl_ack_n; | |
301 | reg serve_tohdl; | |
302 | ||
303 | wire proc_tid_is_dirty= tid_dirty_rdata_bus[procflag_xid]; | |
304 | ||
305 | always @(/*AUTOSENSE*/client_accept_n or cmdl_cs or cmdl_req_n | |
306 | or dv_idle or dvflag or procflag or procflag_err | |
307 | or procflag_rd or serve_tohdl or smx_dmc_ack_rdy | |
308 | or smx_dmc_rdy or tohdl_cmdl_req or tohdl_cmdl_xid | |
309 | or proc_tid_is_dirty) begin | |
310 | smx_dmc_rdy_n= smx_dmc_rdy; | |
311 | smx_dmc_ack_rdy_n= smx_dmc_ack_rdy; | |
312 | ld_dmc_n= 1'b0; // pulse to flop out smx_dmc cmd bus | |
313 | set_dvflag_n= 1'b0; // also set dvflag_data | |
314 | early_dvflag_n= 1'b0; | |
315 | rst_procflag_n= 1'b0; | |
316 | rst_serve_tohdl_n= 1'b0; | |
317 | cmdl_tohdl_ack_n= 1'b0; | |
318 | cmdl_ns= cmdl_cs; | |
319 | case(cmdl_cs) | |
320 | cmdl_s0: begin // wait procflag & !dvflag | |
321 | // gen early_dvflag_xx using procflag_xx | |
322 | ||
323 | // err ??? time share this with | |
324 | // err handle; | |
325 | // if both arb: serve_errhdl_first & lauch_err, cmdl_s3 (errhdl state) | |
326 | // set served errhdl_first= each regular served | |
327 | // rst each errhdl served | |
328 | // | |
329 | if(tohdl_cmdl_req & (serve_tohdl | (~serve_tohdl & ~cmdl_req_n))) begin | |
330 | if(!dvflag) cmdl_ns= cmdl_s3; | |
331 | end | |
332 | else begin | |
333 | if(procflag && !dvflag) begin | |
334 | // flop in procflag_xx (->early_dvflag_xx) | |
335 | rst_procflag_n= 1'b1; | |
336 | if(procflag_err[0] | proc_tid_is_dirty) begin // pkterr; drop pkt | |
337 | cmdl_ns= cmdl_s2; | |
338 | end | |
339 | else begin // launch cmd | |
340 | if(procflag_rd) // rd | |
341 | smx_dmc_rdy_n= 1'b1; | |
342 | else // wr | |
343 | smx_dmc_ack_rdy_n= 1'b1; | |
344 | ld_dmc_n= 1'b1; // flop out dmc cmd bus | |
345 | cmdl_ns= cmdl_s1; | |
346 | end | |
347 | end | |
348 | end | |
349 | end | |
350 | cmdl_s1: begin // wait dmc client accept | |
351 | // use procflag_xx_r to derive dvflag_xx_n | |
352 | if(client_accept_n) begin | |
353 | if(dv_idle) // kick dv earlier; save one cycle at start | |
354 | early_dvflag_n= 1'b1; // early_dvflag_xx available | |
355 | else | |
356 | set_dvflag_n= 1'b1; | |
357 | smx_dmc_rdy_n= 1'b0; // put all rdy to 0 | |
358 | smx_dmc_ack_rdy_n= 1'b0; | |
359 | cmdl_ns= cmdl_s0; | |
360 | end | |
361 | end | |
362 | cmdl_s2: begin // pkterr; drop pkt | |
363 | set_dvflag_n= 1'b1; | |
364 | cmdl_ns= cmdl_s0; | |
365 | end | |
366 | cmdl_s3: begin // TO hdlr | |
367 | rst_serve_tohdl_n= 1'b1; | |
368 | ld_dmc_n= 1'b1; | |
369 | if(tohdl_cmdl_xid[5]) // wr | |
370 | smx_dmc_ack_rdy_n= 1'b1; | |
371 | else | |
372 | smx_dmc_rdy_n= 1'b1; | |
373 | cmdl_ns= cmdl_s4; | |
374 | end | |
375 | cmdl_s4: begin | |
376 | if(client_accept_n) begin | |
377 | set_dvflag_n= 1'b1; | |
378 | smx_dmc_rdy_n= 1'b0; // put all rdy to 0 | |
379 | smx_dmc_ack_rdy_n= 1'b0; | |
380 | cmdl_tohdl_ack_n= 1'b1; | |
381 | cmdl_ns= cmdl_s0; | |
382 | end | |
383 | end | |
384 | endcase | |
385 | end | |
386 | ||
387 | always @(posedge clk) begin | |
388 | if(!reset_l) begin | |
389 | cmdl_cs<= `SMX_PD cmdl_s0; | |
390 | smx_dmc_rdy<= `SMX_PD 1'b0; | |
391 | smx_dmc_ack_rdy<= `SMX_PD 1'b0; | |
392 | dvflag<= `SMX_PD 1'b0; | |
393 | serve_tohdl<= `SMX_PD 1'b0; | |
394 | end | |
395 | else begin | |
396 | cmdl_cs<= `SMX_PD cmdl_ns; | |
397 | smx_dmc_rdy<= `SMX_PD smx_dmc_rdy_n; | |
398 | smx_dmc_ack_rdy<= `SMX_PD smx_dmc_ack_rdy_n; | |
399 | if(set_dvflag_n) dvflag<= `SMX_PD 1'b1; | |
400 | else if(rst_dvflag) dvflag<= `SMX_PD 1'b0; | |
401 | if(rst_procflag_n) serve_tohdl<= `SMX_PD 1'b1; | |
402 | else if(rst_serve_tohdl_n) serve_tohdl<= `SMX_PD 1'b0; | |
403 | end | |
404 | end | |
405 | ||
406 | // wire cmdlaunch_idle= (cmdl_cs==cmdl_s0); | |
407 | ||
408 | // reg [3:0] procflag_sop_line_en_r; | |
409 | // reg [3:0] procflag_eop_line_en_r; | |
410 | // reg [3:0] procflag_sop_byte_en_r; | |
411 | // reg [3:0] procflag_eop_byte_en_r; | |
412 | // reg [2:0] procflag_err_r; | |
413 | // reg procflag_rd_r; | |
414 | // reg procflag_with_data_r; | |
415 | // reg procflag_xcomp_r; | |
416 | // reg procflag_sop_r; | |
417 | // reg procflag_eop_r; | |
418 | ||
419 | reg [7:0] smx_dmc_cmd; | |
420 | reg [3:0] smx_dmc_cmd_status; | |
421 | reg [63:0] smx_dmc_addr; | |
422 | reg [13:0] smx_dmc_len; | |
423 | reg [5:0] smx_dmc_xid; | |
424 | reg [1:0] smx_dmc_port; | |
425 | reg [4:0] smx_dmc_dma; | |
426 | reg [7:0] smx_dmc_client; | |
427 | ||
428 | // wire [63:0] smx_dmc_ack_addr= smx_dmc_addr; | |
429 | // wire [13:0] smx_dmc_ack_len= smx_dmc_len; | |
430 | // wire [1:0] smx_dmc_ack_port= smx_dmc_port; | |
431 | ||
432 | // cc registered to prevent ghosting effect with response bus 062905 | |
433 | // wire [7:0] smx_dmc_ack_cmd= smx_dmc_cmd; | |
434 | // wire [3:0] smx_dmc_ack_cmd_status= smx_dmc_cmd_status; | |
435 | // wire [5:0] smx_dmc_ack_xid= smx_dmc_xid; | |
436 | // wire [4:0] smx_dmc_ack_dma= smx_dmc_dma; | |
437 | // wire [7:0] smx_dmc_ack_client= smx_dmc_client; | |
438 | ||
439 | reg [6:0] resp_len_n; | |
440 | ||
441 | reg [7:0] smx_dmc_ack_cmd; | |
442 | reg [3:0] smx_dmc_ack_cmd_status; | |
443 | reg [5:0] smx_dmc_ack_xid; | |
444 | reg [4:0] smx_dmc_ack_dma; | |
445 | reg [7:0] smx_dmc_ack_client; | |
446 | ||
447 | always @(posedge clk) begin | |
448 | if(ld_dmc_n & smx_dmc_ack_rdy_n) begin // cc qualify to smx_dmc_ack_rdy_n 062905 | |
449 | smx_dmc_ack_cmd <= `SMX_PD (rst_serve_tohdl_n)? tohdl_cmdl_cmd : procflag_cmd; | |
450 | smx_dmc_ack_cmd_status <= `SMX_PD (rst_serve_tohdl_n)? 4'hf : 4'h0; | |
451 | smx_dmc_ack_xid <= `SMX_PD (rst_serve_tohdl_n)? tohdl_cmdl_xid : procflag_xid; | |
452 | smx_dmc_ack_dma <= `SMX_PD (rst_serve_tohdl_n)? tohdl_cmdl_dma : procflag_dma; | |
453 | smx_dmc_ack_client <= `SMX_PD (rst_serve_tohdl_n)? tohdl_cmdl_client : procflag_client; | |
454 | end | |
455 | end | |
456 | ||
457 | always @(posedge clk) begin | |
458 | if(ld_dmc_n & smx_dmc_rdy_n) begin // cc qualify to smx_dmc_rdy_n 062905 | |
459 | smx_dmc_cmd <= `SMX_PD (rst_serve_tohdl_n)? tohdl_cmdl_cmd : procflag_cmd; | |
460 | smx_dmc_cmd_status <= `SMX_PD (rst_serve_tohdl_n)? 4'hf : 4'h0; | |
461 | smx_dmc_addr <= `SMX_PD (rst_serve_tohdl_n)? tohdl_cmdl_addr : procflag_addr; | |
462 | smx_dmc_len <= `SMX_PD (rst_serve_tohdl_n)? tohdl_cmdl_len : {7'h0, resp_len_n}; | |
463 | smx_dmc_xid <= `SMX_PD (rst_serve_tohdl_n)? tohdl_cmdl_xid : procflag_xid; | |
464 | smx_dmc_port <= `SMX_PD (rst_serve_tohdl_n)? tohdl_cmdl_port : procflag_port; | |
465 | smx_dmc_dma <= `SMX_PD (rst_serve_tohdl_n)? tohdl_cmdl_dma : procflag_dma; | |
466 | smx_dmc_client <= `SMX_PD (rst_serve_tohdl_n)? tohdl_cmdl_client : procflag_client; | |
467 | ||
468 | // also make own copy of non dmc | |
469 | // make not need this copy ??? | |
470 | // procflag_sop_line_en_r<= `SMX_PD procflag_sop_line_en; | |
471 | // procflag_eop_line_en_r<= `SMX_PD procflag_eop_line_en; | |
472 | // procflag_sop_byte_en_r<= `SMX_PD procflag_sop_byte_en; | |
473 | // procflag_eop_byte_en_r<= `SMX_PD procflag_eop_byte_en; | |
474 | // procflag_err_r<= `SMX_PD procflag_err; | |
475 | // procflag_rd_r<= `SMX_PD procflag_rd; | |
476 | // procflag_with_data_r<= `SMX_PD procflag_with_data; | |
477 | // procflag_xcomp_r<= `SMX_PD procflag_xcomp; | |
478 | // procflag_sop_r<= `SMX_PD procflag_sop; | |
479 | // procflag_eop_r<= `SMX_PD procflag_eop; | |
480 | end | |
481 | end | |
482 | ||
483 | reg [3:0] dvflag_line_en_n; | |
484 | always @ (/*AUTOSENSE*/procflag_eop or procflag_eop_line_en | |
485 | or procflag_sop or procflag_sop_line_en) begin | |
486 | case({procflag_sop, procflag_eop}) | |
487 | 2'b00: dvflag_line_en_n= 4'hf; // mid of pkt | |
488 | 2'b01: dvflag_line_en_n= procflag_eop_line_en; // rcving eop | |
489 | 2'b10: dvflag_line_en_n= procflag_sop_line_en; // rcving sop | |
490 | 2'b11: dvflag_line_en_n= (procflag_sop_line_en & procflag_eop_line_en); // single 64B | |
491 | endcase | |
492 | end | |
493 | ||
494 | reg [3:0] dvflag_sop_pos_n; | |
495 | always @ (/*AUTOSENSE*/procflag_sop_line_en) begin | |
496 | dvflag_sop_pos_n= 4'h0; | |
497 | case(procflag_sop_line_en) | |
498 | 4'b1111: dvflag_sop_pos_n= 4'b0001; | |
499 | 4'b1110: dvflag_sop_pos_n= 4'b0010; | |
500 | 4'b1100: dvflag_sop_pos_n= 4'b0100; | |
501 | 4'b1000: dvflag_sop_pos_n= 4'b1000; | |
502 | default: dvflag_sop_pos_n= 4'b0000; | |
503 | endcase | |
504 | end | |
505 | ||
506 | reg [3:0] dvflag_eop_pos_n; | |
507 | always @ (/*AUTOSENSE*/procflag_eop_line_en) begin | |
508 | dvflag_eop_pos_n= 4'h0; | |
509 | case(procflag_eop_line_en) | |
510 | 4'b1111: dvflag_eop_pos_n= 4'b1000; | |
511 | 4'b0111: dvflag_eop_pos_n= 4'b0100; | |
512 | 4'b0011: dvflag_eop_pos_n= 4'b0010; | |
513 | 4'b0001: dvflag_eop_pos_n= 4'b0001; | |
514 | default: dvflag_eop_pos_n= 4'b0000; | |
515 | endcase | |
516 | end | |
517 | ||
518 | wire [3:0] dvflag_xcomp_n; | |
519 | assign dvflag_xcomp_n[3]= procflag_xcomp & dvflag_line_en_n[3]; | |
520 | assign dvflag_xcomp_n[2]= procflag_xcomp && (dvflag_line_en_n[3:2]==2'b01); | |
521 | assign dvflag_xcomp_n[1]= procflag_xcomp && (dvflag_line_en_n[3:1]==3'b001); | |
522 | assign dvflag_xcomp_n[0]= (procflag_xcomp && (dvflag_line_en_n[3:0]==4'b0001)) || // rd | |
523 | (~procflag_rd && procflag_xcomp); // wr | |
524 | ||
525 | reg [1:0] dvflag_with_data; | |
526 | reg [3:0] dvflag_line_en; | |
527 | reg [3:0] dvflag_sop_pos; // indicate first data line position | |
528 | reg [3:0] dvflag_eop_pos; // indicate last data line position | |
529 | reg [15:0] dvflag_sop_byte_en; // use this for 'first' data line | |
530 | reg [15:0] dvflag_eop_byte_en; // use this for 'last' data line | |
531 | reg [7:0] dvflag_client; | |
532 | reg [3:0] dvflag_xcomp; | |
533 | reg [3:0] dvflag_status; | |
534 | ||
535 | reg [1:0] early_dvflag_with_data; // 1= rd (data,dv also sio dq) , | |
536 | // 0= wr/rderr (sio dq only) | |
537 | reg [3:0] early_dvflag_line_en; | |
538 | reg [3:0] early_dvflag_sop_pos; // indicate first data line position | |
539 | reg [3:0] early_dvflag_eop_pos; // indicate last data line position | |
540 | reg [15:0] early_dvflag_sop_byte_en; // use this for 'first' data line | |
541 | reg [15:0] early_dvflag_eop_byte_en; // use this for 'last' data line | |
542 | reg [7:0] early_dvflag_client; | |
543 | reg [3:0] early_dvflag_xcomp; | |
544 | reg [3:0] early_dvflag_status; | |
545 | ||
546 | ||
547 | wire procflag_err_0_cond= proc_tid_is_dirty? 1'b1 : procflag_err[0]; | |
548 | ||
549 | always @(posedge clk) begin | |
550 | if(rst_procflag_n) begin // make early dvflag_xxx | |
551 | early_dvflag_with_data<= `SMX_PD {procflag_rd, procflag_with_data}; | |
552 | early_dvflag_line_en<= `SMX_PD dvflag_line_en_n; | |
553 | // if rcving sop, sop at line X, else 0 | |
554 | early_dvflag_sop_pos<= `SMX_PD (procflag_sop)? dvflag_sop_pos_n : 4'h0; | |
555 | // if rcving eop, eop at line X, else 0 | |
556 | early_dvflag_eop_pos<= `SMX_PD (procflag_eop)? dvflag_eop_pos_n : 4'h0; | |
557 | // if 1 in sop/eop_pos , use sop/eop_byte_en | |
558 | early_dvflag_sop_byte_en<= `SMX_PD decode_sop_16b_byte_en_little(procflag_sop_byte_en); | |
559 | early_dvflag_eop_byte_en<= `SMX_PD decode_eop_16b_byte_en_little(procflag_eop_byte_en); | |
560 | early_dvflag_xcomp<= `SMX_PD dvflag_xcomp_n; | |
561 | early_dvflag_status<= `SMX_PD {1'b0, procflag_err[2:1],procflag_err_0_cond}; // extract from procflag_err | |
562 | early_dvflag_client<= `SMX_PD procflag_client; | |
563 | end | |
564 | if(set_dvflag_n) begin | |
565 | dvflag_with_data<= `SMX_PD (cmdl_tohdl_ack_n)? {~tohdl_cmdl_xid[5], 1'b0} : | |
566 | early_dvflag_with_data; | |
567 | dvflag_line_en<= `SMX_PD (cmdl_tohdl_ack_n)? 4'h0 : early_dvflag_line_en; | |
568 | dvflag_sop_pos<= `SMX_PD (cmdl_tohdl_ack_n)? 4'h0: early_dvflag_sop_pos; | |
569 | dvflag_eop_pos<= `SMX_PD (cmdl_tohdl_ack_n)? 4'h0: early_dvflag_eop_pos; | |
570 | dvflag_sop_byte_en<= `SMX_PD (cmdl_tohdl_ack_n)? 16'h0: early_dvflag_sop_byte_en; | |
571 | dvflag_eop_byte_en<= `SMX_PD (cmdl_tohdl_ack_n)? 16'h0: early_dvflag_eop_byte_en; | |
572 | dvflag_xcomp<= `SMX_PD (cmdl_tohdl_ack_n)? 4'h1 : early_dvflag_xcomp; | |
573 | dvflag_status<= `SMX_PD (cmdl_tohdl_ack_n)? 4'h0 : early_dvflag_status; | |
574 | dvflag_client<= `SMX_PD (cmdl_tohdl_ack_n)? tohdl_cmdl_client : early_dvflag_client; | |
575 | end | |
576 | /* | |
577 | ??? note if need to have bubble between accept and dv, | |
578 | need to put this back; right now, dv assert immediate | |
579 | after accpet ??? | |
580 | or simply hard code dv_idle to 0; | |
581 | ||
582 | if(set_dvflag_n) begin // right hand side all xx_r; gen dvflag_xx late | |
583 | // important!! | |
584 | // remember to chg dvflag_xx_n above to use _r if wanna use this | |
585 | // line_en_n, eop/sop_pos_n.... | |
586 | // important!! | |
587 | dvflag_with_data<= `SMX_PD procflag_with_data_r; | |
588 | dvflag_line_en<= `SMX_PD dvflag_line_en_n; | |
589 | dvflag_sop_pos<= `SMX_PD (procflag_sop_r)? dvflag_sop_pos_n : 4'h0; | |
590 | dvflag_eop_pos<= `SMX_PD (procflag_eop_r)? dvflag_eop_pos_n : 4'h0; | |
591 | dvflag_sop_byte_en<= `SMX_PD decode_sop_16b_byte_en_big(procflag_sop_byte_en_r); | |
592 | dvflag_eop_byte_en<= `SMX_PD decode_eop_16b_byte_en_big(procflag_eop_byte_en_r); | |
593 | dvflag_xcomp<= `SMX_PD procflag_xcomp_r; | |
594 | dvflag_status<= `SMX_PD 4'h0; // extract from procflag_err ???; | |
595 | dvflag_client<= `SMX_PD smx_dmc_client; | |
596 | end | |
597 | */ | |
598 | end | |
599 | ||
600 | // adj resp_len to be actual len | |
601 | // not sure if timing can be a problem ?? | |
602 | ||
603 | wire [1:0] sum_line_en_n= {1'b0, dvflag_line_en_n[0]} + | |
604 | {1'b0, dvflag_line_en_n[1]} + | |
605 | {1'b0, dvflag_line_en_n[2]} + | |
606 | {1'b0, dvflag_line_en_n[3]}; | |
607 | reg [6:0] sum_line_en_in_byte_n; // line_en in bytes | |
608 | ||
609 | always @(/*AUTOSENSE*/sum_line_en_n) begin | |
610 | case(sum_line_en_n) | |
611 | 2'h0: sum_line_en_in_byte_n= 7'd64; | |
612 | 2'h1: sum_line_en_in_byte_n= 7'd16; | |
613 | 2'h2: sum_line_en_in_byte_n= 7'd32; | |
614 | 2'h3: sum_line_en_in_byte_n= 7'd48; | |
615 | default: sum_line_en_in_byte_n= 7'd64; | |
616 | endcase | |
617 | end | |
618 | ||
619 | //wire [4:0] sop_firstline_in_byte_n= 5'd16 - {1'b0, procflag_sop_byte_en}; | |
620 | wire [4:0] sop_firstline_notuse_in_byte_n= {1'b0, procflag_sop_byte_en}; | |
621 | wire [4:0] eop_lastline_in_byte_n= (|procflag_eop_byte_en)? | |
622 | {1'b0, procflag_eop_byte_en} : 5'd16; | |
623 | wire [4:0] eop_lastline_notuse_in_byte_n= 5'd16 - eop_lastline_in_byte_n; | |
624 | ||
625 | always @(/*AUTOSENSE*/eop_lastline_notuse_in_byte_n or procflag_eop | |
626 | or procflag_sop or sop_firstline_notuse_in_byte_n | |
627 | or sum_line_en_in_byte_n) begin | |
628 | case({procflag_sop, procflag_eop}) | |
629 | 2'h0: resp_len_n= sum_line_en_in_byte_n; // mid resp | |
630 | 2'h1: resp_len_n= sum_line_en_in_byte_n - {2'h0, eop_lastline_notuse_in_byte_n}; // eop | |
631 | 2'h2: resp_len_n= sum_line_en_in_byte_n - {2'h0, sop_firstline_notuse_in_byte_n}; // sop | |
632 | 2'h3: resp_len_n= sum_line_en_in_byte_n - {2'h0, sop_firstline_notuse_in_byte_n} | |
633 | - {2'h0, eop_lastline_notuse_in_byte_n}; | |
634 | // sop/eop in this resp chunk | |
635 | default: resp_len_n= 7'd64; | |
636 | endcase | |
637 | end | |
638 | ||
639 | endmodule | |
640 | ||
641 | ||
642 | ||
643 | ||
644 |