Unified Coverage Report :: Module :: spi_passthrough

Module : spi_passthrough

SCORE	LINE	COND	TOGGLE	FSM	BRANCH	ASSERT
90.17	94.50	88.66		75.00	92.71	100.00

Source File(s) :
/workspaces/repo/scratch/os_regression_2024_10_14/spi_device_2p-sim-vcs/default/sim-vcs/../src/lowrisc_ip_spi_device_0.1/rtl/spi_passthrough.sv

Module self-instances :

NAME	SCORE	LINE	COND	TOGGLE	FSM	BRANCH	ASSERT
tb.dut.u_passthrough	90.74	94.50	91.49		75.00	92.71	100.00

---

Module Instance : tb.dut.u_passthrough

Instance :

SCORE	LINE	COND	TOGGLE	FSM	BRANCH	ASSERT
90.74	94.50	91.49		75.00	92.71	100.00

Instance's subtree :

SCORE	LINE	COND	TOGGLE	FSM	BRANCH	ASSERT
91.08	94.95	91.92		75.00	93.52	100.00

Parent :

SCORE	LINE	COND	TOGGLE	FSM	BRANCH	ASSERT	NAME
95.10	95.20	93.48	97.84		93.55	95.45	dut

Subtrees :

NAME	SCORE	LINE	COND	TOGGLE	FSM	BRANCH	ASSERT
u_pt_sck_cg	100.00	100.00	100.00			100.00
u_read_half_cycle	100.00	100.00				100.00
u_read_pipe_oe_stg1	100.00	100.00				100.00
u_read_pipe_oe_stg2	100.00	100.00				100.00
u_read_pipe_stg1	100.00	100.00				100.00
u_read_pipe_stg2	100.00	100.00				100.00

Line Coverage for Module : spi_passthrough

	Line No.	Total	Covered	Percent
TOTAL		200	189	94.50
CONT_ASSIGN	271	1	1	100.00
CONT_ASSIGN	276	1	1	100.00
CONT_ASSIGN	326	1	1	100.00
CONT_ASSIGN	333	1	1	100.00
ALWAYS	336	4	4	100.00
ALWAYS	345	4	4	100.00
ALWAYS	349	3	3	100.00
CONT_ASSIGN	355	1	1	100.00
ALWAYS	360	4	4	100.00
CONT_ASSIGN	372	1	1	100.00
CONT_ASSIGN	373	1	1	100.00
ALWAYS	376	4	4	100.00
ALWAYS	400	8	8	100.00
ALWAYS	414	4	4	100.00
ALWAYS	425	4	4	100.00
CONT_ASSIGN	439	0	0
ALWAYS	449	4	4	100.00
CONT_ASSIGN	463	1	1	100.00
ALWAYS	466	3	3	100.00
CONT_ASSIGN	475	1	1	100.00
ALWAYS	478	3	3	100.00
ALWAYS	486	6	6	100.00
CONT_ASSIGN	497	1	1	100.00
ALWAYS	506	3	3	100.00
ALWAYS	520	4	4	100.00
ALWAYS	528	3	3	100.00
ALWAYS	533	6	6	100.00
ALWAYS	539	3	3	100.00
CONT_ASSIGN	543	1	1	100.00
CONT_ASSIGN	546	1	1	100.00
ALWAYS	561	5	5	100.00
CONT_ASSIGN	570	1	1	100.00
CONT_ASSIGN	572	1	1	100.00
CONT_ASSIGN	575	1	1	100.00
CONT_ASSIGN	576	1	1	100.00
ALWAYS	582	6	6	100.00
CONT_ASSIGN	589	1	1	100.00
ALWAYS	596	6	4	66.67
CONT_ASSIGN	604	1	1	100.00
CONT_ASSIGN	609	1	1	100.00
ALWAYS	613	3	3	100.00
CONT_ASSIGN	616	1	1	100.00
ALWAYS	685	13	13	100.00
ALWAYS	713	3	3	100.00
CONT_ASSIGN	728	1	1	100.00
CONT_ASSIGN	734	1	1	100.00
CONT_ASSIGN	737	1	1	100.00
ALWAYS	745	3	3	100.00
ALWAYS	753	68	59	86.76

270                       logic is_active;
271        1/1            assign is_active = (spi_mode_i == PassThrough);
           Tests:       T1 T2 T3 
272                     
273                       logic [7:0] opcode, opcode_d;
274                     
275                       logic unused_opcode_7;
276        1/1            assign unused_opcode_7 = opcode[7];
           Tests:       T1 T2 T3 
277                     
278                       // If the filter becomes 1 on the 8th beat, it lowers SCK enable signal to CG
279                       // cell then, at the 8th posedge of SCK, csb_deassert becomes 1.
280                       //                      ____      ____      ____
281                       // SCK             ____/ 7  \____/ 8  \____/
282                       //                             ___
283                       // filter       _______/XXXXXX/   \______________
284                       //              ______________
285                       // sck_gate_en                \__________________
286                       //                                 ______________
287                       // csb_deassert __________________/
288                       logic filter;
289                     
290                       // If 1, SCK propagates to the downstream SPI Flash device.
291                       logic sck_gate_en;
292                     
293                       // CSb to the downstream device control If 1, CSb is de-asserted. This signal
294                       // is glitch sensitive. This value is changed at SCK posedge. This does not
295                       // drive CSb output directly. CSb to downstream is OR-ed with this and CSb
296                       // from host system.
297                       //
298                       // `cdb_deassert` should be latched at the posedge of SCK. `filter` signal is
299                       // computed in between the 7th posedge of SCK and the 8th posedge. As the
300                       // command bit does not arrive until the 7th negedge of SCK, the filter signal
301                       // is not valid in the first half of the period. By latching the filter signal
302                       // at the posedge of the SCK, csb_deassert always shows correct value if the
303                       // command needs to be filtered or not.
304                       //
305                       // However, the CSb output to the downstream flash device is better to be in
306                       // the out clock domain. It helps the design constraints to be simpler. So,
307                       // the `csb_deassert` is again latched at the outclk (which is the negedge of
308                       // SCK).
309                       logic csb_deassert;
310                       logic csb_deassert_outclk;
311                     
312                       // == BEGIN: Counters  ======================================================
313                       // bitcnt to count up to dummy
314                       localparam int unsigned MetaMaxBeat = 8+32+8; // Cmd + Addr + Dummy
315                       localparam int unsigned MetaBitCntW = $clog2(MetaMaxBeat);
316                       logic [MetaBitCntW-1:0] bitcnt;
317                     
318                       // Address or anything host driving after opcode counter
319                       logic [AddrCntW-1:0] addrcnt_outclk;
320                     
321                       // Dummy counter
322                       logic [DummyCntW-1:0] dummycnt, dummycnt_d;
323                       // -- END:   Counters  ------------------------------------------------------
324                     
325                       // event
326        1/1            assign event_cmd_filtered_o = filter;
           Tests:       T1 T2 T3 
327                     
328                       //////////////
329                       // Datapath //
330                       //////////////
331                     
332                       // Opcode Latch
333        1/1            assign opcode_d = {opcode[6:0], host_s_i[0]};
           Tests:       T1 T2 T3 
334                     
335                       always_ff @(posedge clk_i or negedge rst_ni) begin
336        1/1              if (!rst_ni) begin
           Tests:       T1 T2 T3 
337        1/1                opcode <= 8'h 00;
           Tests:       T1 T2 T3 
338        1/1              end else if (bitcnt < MetaBitCntW'(8)) begin
           Tests:       T6 T9 T10 
339        1/1                opcode <= opcode_d;
           Tests:       T6 T9 T10 
340                         end
                        MISSING_ELSE
341                       end
342                     
343                       // Command Filter: CSb control
344                       always_ff @(posedge clk_i or negedge rst_ni) begin
345        2/2              if (!rst_ni)     csb_deassert <= 1'b 0;
           Tests:       T1 T2 T3  | T1 T2 T3 
346        2/2              else if (filter) csb_deassert <= 1'b 1;
           Tests:       T6 T9 T10  | T6 T9 T10 
                        MISSING_ELSE
347                       end
348                       always_ff @(posedge clk_out_i or negedge rst_out_ni) begin
349        2/2              if (!rst_out_ni) csb_deassert_outclk <= 1'b 0;
           Tests:       T1 T2 T3  | T1 T2 T3 
350        1/1              else             csb_deassert_outclk <= csb_deassert;
           Tests:       T6 T9 T10 
351                       end
352                     
353                       // Look at the waveform above to see why sck_gate_en is inversion of fliter OR
354                       // csb_deassert
355        1/1            assign sck_gate_en = ~(filter | csb_deassert);
           Tests:       T1 T2 T3 
356                     
357                       // Bitcnt counter
358                       /// Bitcnt increases until it hit the max value then wait reset.
359                       always_ff @(posedge clk_i or negedge rst_ni) begin
360        1/1              if (!rst_ni) begin
           Tests:       T1 T2 T3 
361        1/1                bitcnt <= '0;
           Tests:       T1 T2 T3 
362        1/1              end else if (bitcnt != '1) begin
           Tests:       T6 T9 T10 
363        1/1                bitcnt <= bitcnt + MetaBitCntW'(1);
           Tests:       T6 T9 T10 
364                         end
                        MISSING_ELSE
365                       end
366                     
367                       // Latch only two bits at 7th cmd opcode
368                       logic cmd_7th; // 7th beat of transaction
369                       logic cmd_8th; // in 8th beat of transaction
370                       logic [1:0] cmd_filter;
371                     
372        1/1            assign cmd_7th = (bitcnt == MetaBitCntW'(6));
           Tests:       T1 T2 T3 
373        1/1            assign cmd_8th = (bitcnt == MetaBitCntW'(7));
           Tests:       T1 T2 T3 
374                     
375                       always_ff @(posedge clk_i or negedge rst_ni) begin
376        1/1              if (!rst_ni) begin
           Tests:       T1 T2 T3 
377        1/1                cmd_filter <= 2'b 00;
           Tests:       T1 T2 T3 
378        1/1              end else if (cmd_7th) begin
           Tests:       T6 T9 T10 
379                           // In this 7th beat, cmd_filter latches 2 bits from cfg_cmd_filter_i
380                           // This reduces the last filter datapath from muxing 256 to just mux2
381                           //
382                           // If below syntax does not work, it can be replaced with
383                           // for (int unsigned i = 0 ; i < 128 ; i++) begin
384                           //   it (i == opcode[6:0]) cmd_filter <= cfg_cmd_filter_i[2*i+:2];
385                           // end
386        1/1                cmd_filter <= cfg_cmd_filter_i[{opcode_d[6:0],1'b0}+:2];
           Tests:       T6 T9 T10 
387                         end
                        MISSING_ELSE
388                       end
389                     
390                       // Command Info Latch
391                       cmd_info_t       cmd_info, cmd_info_d;
392                       cmd_info_t [1:0] cmd_info_7th, cmd_info_7th_d;
393                     
394                       logic [AddrCntW-1:0] addr_size_d;
395                     
396                       logic cmd_info_latch;
397                     
398                       // Search opcode @ 7th opcode
399                       always_comb begin
400        1/1              cmd_info_7th_d = {CmdInfoInput, CmdInfoInput};
           Tests:       T1 T2 T3 
401        1/1              if (cmd_7th) begin
           Tests:       T1 T2 T3 
402        1/1                for(int unsigned i = 0 ; i < NumTotalCmdInfo ; i++) begin
           Tests:       T6 T9 T10 
403        1/1                  if (cmd_info_i[i].valid) begin
           Tests:       T6 T9 T10 
404        1/1                    if (cmd_info_i[i].opcode == {opcode_d[6:0], 1'b1}) begin
           Tests:       T6 T9 T10 
405        1/1                      cmd_info_7th_d[1] = cmd_info_i[i];
           Tests:       T6 T9 T10 
406        1/1                    end else if (cmd_info_i[i].opcode == {opcode_d[6:0], 1'b0}) begin
           Tests:       T6 T9 T10 
407        1/1                      cmd_info_7th_d[0] = cmd_info_i[i];
           Tests:       T6 T9 T17 
408                               end
                        MISSING_ELSE
409                             end // cmd_info_i[i].valid
                        MISSING_ELSE
410                           end
411                         end
                        MISSING_ELSE
412                       end
413                       always_ff @(posedge clk_i or negedge rst_ni) begin
414        1/1              if (!rst_ni) begin
           Tests:       T1 T2 T3 
415        1/1                cmd_info_7th <= '0;
           Tests:       T1 T2 T3 
416        1/1              end else if (cmd_7th) begin
           Tests:       T6 T9 T10 
417                           // Search two candidate among NumCmdInfo. If only one matched, other
418                           // cmd_info is Always Input command.
419        1/1                cmd_info_7th <= cmd_info_7th_d;
           Tests:       T6 T9 T10 
420                           //cmd_info_7th <= {PassThroughCmdInfo[{opcode_d[6:0],1'b1}],
421                           //                 PassThroughCmdInfo[{opcode_d[6:0],1'b0}]};
422                         end
                        MISSING_ELSE
423                       end
424                       always_ff @(posedge clk_i or negedge rst_ni) begin
425        1/1              if (!rst_ni) begin
           Tests:       T1 T2 T3 
426        1/1                cmd_info <= '0;
           Tests:       T1 T2 T3 
427        1/1              end else if (cmd_info_latch) begin
           Tests:       T6 T9 T10 
428                           // Latch only two cmd_info when the 7th bit arrives. Then select among two
429                           // at the 8th beat for cmd_info_d to reduce timing.
430        1/1                cmd_info <= cmd_info_d;
           Tests:       T6 T9 T10 
431                         end
                        MISSING_ELSE
432                       end
433                     
434                       // Some of the fields of cmd_info are used in the big FSM below. The opcode field and the addr_*
435                       // fields are ignored because we pick them from cmd_info_d instead (in a different FSM state). We
436                       // rely on the synthesis tool not to generate the unneeded flops but must explicitly waive lint
437                       // warnings about unused fields.
438                       logic unused_cmd_info_fields;
439        unreachable    assign unused_cmd_info_fields = &{
440                         1'b0,
441                         cmd_info.valid, // valid bit is checked before latching into cmd_info
442                         cmd_info.opcode,
443                         cmd_info.opcode,
444                         cmd_info.upload,
445                         cmd_info.busy
446                       };
447                     
448                       always_comb begin
449        1/1              cmd_info_d = '0;
           Tests:       T1 T2 T3 
450                     
451        1/1              if (cmd_8th) begin
           Tests:       T1 T2 T3 
452                           // Latch only two cmd_info when the 7th bit arrives. Then select among two
453                           // at the 8th beat for cmd_info_d to reduce timing.
454        1/1                cmd_info_d = cmd_info_7th[host_s_i[0]];
           Tests:       T6 T9 T10 
455                     
456        1/1                cmd_info_d.opcode = opcode_d;
           Tests:       T6 T9 T10 
457                     
458                           // dummy_size is set inside State Machine
459                         end
                        MISSING_ELSE
460                       end
461                     
462                       addr_mode_e addr_mode;
463        1/1            assign addr_mode = get_addr_mode(cmd_info.addr_mode, cfg_addr_4b_en_i);
           Tests:       T1 T2 T3 
464                     
465                       always_comb begin
466        1/1              addr_size_d = AddrCntW'(23);
           Tests:       T1 T2 T3 
467        1/1              if (addr_mode == Addr4B) begin
           Tests:       T1 T2 T3 
468        1/1                addr_size_d = AddrCntW'(31);
           Tests:       T10 T16 T17 
469                         end
                        MISSING_ELSE
470                       end
471                     
472                       // Address swap
473                       logic addr_set_d, addr_set_q;
474                       logic addr_phase, addr_phase_outclk;
475        1/1            assign addr_phase = (st == StAddress);
           Tests:       T1 T2 T3 
476                     
477                       always_ff @(posedge clk_i or negedge rst_ni) begin
478        1/1              if (!rst_ni) begin
           Tests:       T1 T2 T3 
479        1/1                addr_set_q <= '0;
           Tests:       T1 T2 T3 
480                         end else begin
481        1/1                addr_set_q <= addr_set_d;
           Tests:       T6 T9 T10 
482                         end
483                       end
484                     
485                       always_ff @(posedge clk_out_i or negedge rst_out_ni) begin
486        1/1              if (!rst_out_ni) begin
           Tests:       T1 T2 T3 
487        1/1                addrcnt_outclk <= '0;
           Tests:       T1 T2 T3 
488        1/1              end else if (addr_set_q) begin
           Tests:       T6 T9 T10 
489        1/1                addrcnt_outclk <= addr_size_d;
           Tests:       T6 T10 T16 
490        1/1              end else if (addrcnt_outclk != '0) begin
           Tests:       T6 T9 T10 
491        1/1                addrcnt_outclk <= addrcnt_outclk - AddrCntW'(1);
           Tests:       T6 T10 T16 
492                         end
                        MISSING_ELSE
493                       end
494                     
495                       // Based on AddrCnt, the logic swap.
496                       logic addr_swap;
497        1/1            assign addr_swap = cfg_addr_mask_i[addrcnt_outclk]
           Tests:       T1 T2 T3 
498                                        ? cfg_addr_value_i[addrcnt_outclk]
499                                        : host_s_i[0];
500                     
501                       // Address swap should happen in outclk domain.
502                       // The state machine operates in inclk domain.
503                       // The state generates mux selection signal.
504                       // The signal latched in outclk domain then activates the mux.
505                       always_ff @(posedge clk_out_i or negedge rst_out_ni) begin
506        2/2              if (!rst_out_ni) addr_phase_outclk <= 1'b 0;
           Tests:       T1 T2 T3  | T1 T2 T3 
507        1/1              else             addr_phase_outclk <= addr_phase;
           Tests:       T6 T9 T10 
508                       end
509                     
510                       // Payload (4 bytes) swap
511                       logic [4:0] payloadcnt, payloadcnt_outclk;
512                       logic       payload_replace, payload_replace_outclk;
513                       logic       payload_replace_set, payload_replace_clr;
514                     
515                       // payload counter
516                       //
517                       // Reset to 'd31. decrease by 1 in every inclk. Stop at 0 then
518                       // payload_replace is cleared.
519                       always_ff @(posedge clk_i or negedge rst_ni) begin
520        1/1              if (!rst_ni) begin
           Tests:       T1 T2 T3 
521        1/1                payloadcnt <= 5'h 1F;
           Tests:       T1 T2 T3 
522        1/1              end else if ((payloadcnt != '0) && payload_replace) begin
           Tests:       T6 T9 T10 
523        1/1                payloadcnt <= payloadcnt - 1'b 1;
           Tests:       T10 T20 T56 
524                         end
                        MISSING_ELSE
525                       end
526                     
527                       always_ff @(posedge clk_out_i or negedge rst_out_ni) begin
528        2/2              if (!rst_out_ni) payloadcnt_outclk <= 5'h 1F;
           Tests:       T1 T2 T3  | T1 T2 T3 
529        1/1              else             payloadcnt_outclk <= payloadcnt;
           Tests:       T6 T9 T10 
530                       end
531                     
532                       always_ff @(posedge clk_i or negedge rst_ni) begin
533        2/2              if (!rst_ni)                  payload_replace <= 1'b 0;
           Tests:       T1 T2 T3  | T1 T2 T3 
534        2/2              else if (payload_replace_set) payload_replace <= 1'b 1;
           Tests:       T6 T9 T10  | T9 T10 T19 
535        2/2              else if (payload_replace_clr) payload_replace <= 1'b 0;
           Tests:       T6 T9 T10  | T10 T20 T56 
                        MISSING_ELSE
536                       end
537                     
538                       always_ff @(posedge clk_out_i or negedge rst_out_ni) begin
539        2/2              if (!rst_out_ni) payload_replace_outclk <= 1'b 0;
           Tests:       T1 T2 T3  | T1 T2 T3 
540        1/1              else             payload_replace_outclk <= payload_replace;
           Tests:       T6 T9 T10 
541                       end
542                     
543        1/1            assign payload_replace_clr = (payloadcnt == '0);
           Tests:       T1 T2 T3 
544                       // FSM drives payload_replace_set : assert when st moves to StDriving
545                       logic payload_swap;
546        1/1            assign payload_swap = cfg_payload_mask_i[payloadcnt_outclk]
           Tests:       T1 T2 T3 
547                                           ? cfg_payload_data_i[payloadcnt_outclk]
548                                           : host_s_i[0] ;
549                     
550                       // SPI swap (merging Addr & Payload)
551                       logic swap_en, swap_data, addr_swap_en, payload_swap_en;
552                     
553                       // Latch cmd_info config signals in output clock.
554                       // cmd_info structure is latched in input clock.  But addr_swap_en and
555                       // payload_swap_en affects the output path (from host to the downstream flash
556                       // device).  as the output delay is bigger than the half of SCK, these paths
557                       // violates timing regardless of the path delay.  By latching the configs
558                       // into output clock (inverted SCK), it alleviates the timing budget.
559                       logic cmd_info_addr_swap_en_outclk, cmd_info_payload_swap_en_outclk;
560                       always_ff @(posedge clk_out_i or negedge rst_out_ni) begin
561        1/1              if (!rst_out_ni) begin
           Tests:       T1 T2 T3 
562        1/1                cmd_info_addr_swap_en_outclk    <= 1'b 0;
           Tests:       T1 T2 T3 
563        1/1                cmd_info_payload_swap_en_outclk <= 1'b 0;
           Tests:       T1 T2 T3 
564                         end else begin
565        1/1                cmd_info_addr_swap_en_outclk    <= cmd_info.addr_swap_en;
           Tests:       T6 T9 T10 
566        1/1                cmd_info_payload_swap_en_outclk <= cmd_info.payload_swap_en;
           Tests:       T6 T9 T10 
567                         end
568                       end
569                     
570        1/1            assign addr_swap_en    = addr_phase_outclk
           Tests:       T1 T2 T3 
571                                              & cmd_info_addr_swap_en_outclk;
572        1/1            assign payload_swap_en = payload_replace_outclk
           Tests:       T1 T2 T3 
573                                              & cmd_info_payload_swap_en_outclk;
574                     
575        1/1            assign swap_en   = addr_swap_en | payload_swap_en ;
           Tests:       T1 T2 T3 
576        1/1            assign swap_data = (addr_swap_en) ? addr_swap : payload_swap ;
           Tests:       T1 T2 T3 
577                     
578                       // Dummy Counter
579                       logic dummy_set;
580                       logic dummycnt_zero;
581                       always_ff @(posedge clk_i or negedge rst_ni) begin
582        2/2              if (!rst_ni) dummycnt <= '0;
           Tests:       T1 T2 T3  | T1 T2 T3 
583        1/1              else if (dummy_set) begin
           Tests:       T6 T9 T10 
584        1/1                dummycnt <= dummycnt_d;
           Tests:       T6 T16 T17 
585        1/1              end else if (st == StHighZ) begin
           Tests:       T6 T9 T10 
586        1/1                dummycnt <= dummycnt - 1'b 1;
           Tests:       T6 T16 T17 
587                         end
                        MISSING_ELSE
588                       end
589        1/1            assign dummycnt_zero = (dummycnt == '0);
           Tests:       T1 T2 T3 
590                     
591                       // MByte counter
592                       logic mbyte_set;
593                       logic mbytecnt_zero;
594                       logic [1:0] mbyte_cnt;
595                       always_ff @(posedge clk_i or negedge rst_ni) begin
596        1/1              if (!rst_ni) begin
           Tests:       T1 T2 T3 
597        1/1                mbyte_cnt <= '0;
           Tests:       T1 T2 T3 
598        1/1              end else if (mbyte_set) begin
           Tests:       T6 T9 T10 
599        0/1     ==>        mbyte_cnt <= 2'h 3;
600        1/1              end else if (st == StMByte) begin
           Tests:       T6 T9 T10 
601        0/1     ==>        mbyte_cnt <= mbyte_cnt - 1'b 1;
602                         end
                        MISSING_ELSE
603                       end
604        1/1            assign mbytecnt_zero = (mbyte_cnt == '0);
           Tests:       T1 T2 T3 
605                     
606                       // = BEGIN: Passthrough Mux (!important) ====================================
607                     
608                       // As swap_en is in outclk domain, addr_swap can be directly used.
609        1/1            assign passthrough_o.s = (swap_en) ? {host_s_i[3:1], swap_data} : host_s_i ;
           Tests:       T1 T2 T3 
610                     
611                       logic [3:0] passthrough_s_en;
612                       always_ff @(posedge clk_out_i or negedge rst_out_ni) begin
613        2/2              if (!rst_out_ni) passthrough_s_en <= 4'h 1; // S[0] active by default
           Tests:       T1 T2 T3  | T1 T2 T3 
614        1/1              else             passthrough_s_en <= device_s_en_inclk;
           Tests:       T6 T9 T10 
615                       end
616        1/1            assign passthrough_o.s_en = passthrough_s_en;
           Tests:       T1 T2 T3 
617                     
618                       // 2-stage pipeline for high-throughput read commands
619                       logic [3:0] half_cycle_sampled_sd;
620                       logic [3:0] read_pipeline_stg1_d, read_pipeline_stg1_q;
621                       logic [3:0] read_pipeline_stg2_d, read_pipeline_stg2_q;
622                       logic [3:0] host_s_en_muxed;
623                       logic [3:0] read_pipeline_oe_stg1_d, read_pipeline_oe_stg1_q;
624                       logic [3:0] read_pipeline_oe_stg2_d, read_pipeline_oe_stg2_q;
625                     
626                       // Sample on the ordinary capture edge, in case half-cycle sampling is
627                       // selected. This flop samples data that is to be prepared for a later
628                       // launch edge, in a sort of store-and-forward setup.
629                       prim_flop #(
630                         .Width         ($bits(passthrough_i.s)),
631                         .ResetValue    ('0)
632                       ) u_read_half_cycle (
633                         .clk_i     (clk_i),
634                         .rst_ni,
635                         .d_i       (passthrough_i.s),
636                         .q_o       (half_cycle_sampled_sd)
637                       );
638                     
639                       // This flop begins the 2-stage pipeline on clk_out_i, the launch clock for
640                       // data output. The input data is either the combinatorial input from the
641                       // pad connected to the downstream SPI flash, or it is the output of the
642                       // u_read_half_cycle flop above, which sampled the data on the capture edge
643                       // that occurred a half cycle earlier.
644                       prim_flop #(
645                         .Width         ($bits(read_pipeline_stg1_d)),
646                         .ResetValue    ('0)
647                       ) u_read_pipe_stg1 (
648                         .clk_i     (clk_out_i),
649                         .rst_ni    (rst_out_ni),
650                         .d_i       (read_pipeline_stg1_d),
651                         .q_o       (read_pipeline_stg1_q)
652                       );
653                     
654                       prim_flop #(
655                         .Width         ($bits(read_pipeline_stg2_d)),
656                         .ResetValue    ('0)
657                       ) u_read_pipe_stg2 (
658                         .clk_i     (clk_out_i),
659                         .rst_ni    (rst_out_ni),
660                         .d_i       (read_pipeline_stg2_d),
661                         .q_o       (read_pipeline_stg2_q)
662                       );
663                     
664                       prim_flop #(
665                         .Width         ($bits(read_pipeline_oe_stg1_d)),
666                         .ResetValue    ('0)
667                       ) u_read_pipe_oe_stg1 (
668                         .clk_i     (clk_out_i),
669                         .rst_ni    (rst_out_ni),
670                         .d_i       (read_pipeline_oe_stg1_d),
671                         .q_o       (read_pipeline_oe_stg1_q)
672                       );
673                     
674                       prim_flop #(
675                         .Width         ($bits(read_pipeline_oe_stg2_d)),
676                         .ResetValue    ('0)
677                       ) u_read_pipe_oe_stg2 (
678                         .clk_i     (clk_out_i),
679                         .rst_ni    (rst_out_ni),
680                         .d_i       (read_pipeline_oe_stg2_d),
681                         .q_o       (read_pipeline_oe_stg2_q)
682                       );
683                     
684                       always_comb begin
685        1/1              host_s_o = passthrough_i.s;
           Tests:       T1 T2 T3 
686        1/1              read_pipeline_stg2_d = read_pipeline_stg1_q;
           Tests:       T1 T2 T3 
687        1/1              read_pipeline_stg1_d = half_cycle_sampled_sd;
           Tests:       T1 T2 T3 
688                     
689        1/1              host_s_en_muxed = host_s_en_inclk;
           Tests:       T1 T2 T3 
690        1/1              read_pipeline_oe_stg2_d = read_pipeline_oe_stg1_q;
           Tests:       T1 T2 T3 
691        1/1              read_pipeline_oe_stg1_d = host_s_en_inclk;
           Tests:       T1 T2 T3 
692                     
693        1/1              unique case (cmd_info.read_pipeline_mode)
           Tests:       T1 T2 T3 
694                           RdPipeTwoStageFullCycle: begin
695        1/1                  host_s_o = read_pipeline_stg2_q;
           Tests:       T20 T39 T55 
696        1/1                  read_pipeline_stg1_d = passthrough_i.s;
           Tests:       T20 T39 T55 
697        1/1                  host_s_en_muxed = read_pipeline_oe_stg2_q;
           Tests:       T20 T39 T55 
698                           end
699                           RdPipeTwoStageHalfCycle: begin
700        1/1                  host_s_o = read_pipeline_stg2_q;
           Tests:       T16 T17 T39 
701        1/1                  read_pipeline_stg1_d = half_cycle_sampled_sd;
           Tests:       T16 T17 T39 
702        1/1                  host_s_en_muxed = read_pipeline_oe_stg2_q;
           Tests:       T16 T17 T39 
703                           end
704                           default: begin
705                             host_s_o = passthrough_i.s;
706                             read_pipeline_stg1_d = half_cycle_sampled_sd;
707                             host_s_en_muxed = host_s_en_inclk;
708                           end
709                         endcase
710                       end
711                     
712                       always_ff @(posedge clk_out_i or negedge rst_out_ni) begin
713        2/2              if (!rst_out_ni) host_s_en_o <= '0; // input mode
           Tests:       T1 T2 T3  | T1 T2 T3 
714        1/1              else             host_s_en_o <= host_s_en_muxed;
           Tests:       T6 T9 T10 
715                       end
716                     
717                       logic pt_gated_sck;
718                       prim_clock_gating #(
719                         .NoFpgaGate    (1'b 0),
720                         .FpgaBufGlobal (1'b 1) // Going outside of chip
721                       ) u_pt_sck_cg (
722                         .clk_i     (host_sck_i  ),
723                         .en_i      (sck_gate_en ),
724                         .test_en_i (1'b 0       ), // No FF connected to this gated SCK
725                         .clk_o     (pt_gated_sck)
726                       );
727                     
728        1/1            assign passthrough_o.sck    = pt_gated_sck;
           Tests:       T1 T2 T3 
729                       assign passthrough_o.sck_en = 1'b 1;
730                     
731                       // CSb propagation:  csb_deassert signal should be an output of FF or latch to
732                       // make CSb glitch-free.
733                       assign passthrough_o.csb_en = 1'b 1;
734        1/1            assign passthrough_o.csb    = host_csb_i | csb_deassert_outclk ;
           Tests:       T1 T2 T3 
735                     
736                       // passthrough_en
737        1/1            assign passthrough_o.passthrough_en = is_active && !passthrough_block_i;
           Tests:       T1 T2 T3 
738                     
739                       // - END:   Passthrough Mux (!important) ------------------------------------
740                     
741                       ///////////////////
742                       // State Machine //
743                       ///////////////////
744                       always_ff @(posedge clk_i or negedge rst_ni) begin
745        1/1              if (!rst_ni) begin
           Tests:       T1 T2 T3 
746        1/1                st <= StIdle;
           Tests:       T1 T2 T3 
747                         end else begin
748        1/1                st <= st_d;
           Tests:       T6 T9 T10 
749                         end
750                       end
751                     
752                       always_comb begin
753        1/1              st_d = st;
           Tests:       T1 T2 T3 
754                     
755                         // filter
756        1/1              filter = 1'b 0;
           Tests:       T1 T2 T3 
757                     
758                         // Command Cfg Latch
759        1/1              cmd_info_latch = 1'b 0;
           Tests:       T1 T2 T3 
760                     
761                         // addr_set
762        1/1              addr_set_d = 1'b 0;
           Tests:       T1 T2 T3 
763                     
764                         // Payload swap control
765        1/1              payload_replace_set = 1'b 0;
           Tests:       T1 T2 T3 
766                     
767                         // mbyte counter udpate
768        1/1              mbyte_set = 1'b 0;
           Tests:       T1 T2 T3 
769                     
770                         // Dummy
771        1/1              dummy_set = 1'b 0;
           Tests:       T1 T2 T3 
772        1/1              dummycnt_d = '0;
           Tests:       T1 T2 T3 
773                     
774                         // Output enable
775        1/1              host_s_en_inclk   = 4'h 0;
           Tests:       T1 T2 T3 
776        1/1              device_s_en_inclk = 4'h 1; // S[0] MOSI active
           Tests:       T1 T2 T3 
777                     
778        1/1              unique case (st)
           Tests:       T1 T2 T3 
779                           StIdle: begin
780        1/1                  if (!is_active) begin
           Tests:       T1 T2 T3 
781        1/1                    st_d = StIdle;
           Tests:       T1 T2 T3 
782        1/1                  end else if (cmd_8th && cmd_filter[host_s_i[0]]) begin
           Tests:       T6 T9 T10 
783        1/1                    st_d = StFilter;
           Tests:       T6 T9 T10 
784        1/1                    filter = 1'b 1;
           Tests:       T6 T9 T10 
785                     
786                               // Send notification event to SW
787        1/1                  end else if (cmd_8th && cmd_info_d.valid) begin
           Tests:       T6 T9 T10 
788        1/1                    cmd_info_latch = 1'b 1;
           Tests:       T6 T9 T10 
789                     
790                               // Divert to multiple states.
791                               //
792                               // The following states are mainly for controlling the output enable
793                               // signals. StAddress state, however, controls the SPI lines for
794                               // address swap in case of Read Commands.
795                               //
796                               // Order: addr_mode , dummy_en, |payload_en
797                               // Note that no direct transition to MByte state.
798        1/1                    if (cmd_info_d.addr_mode != AddrDisabled) begin
           Tests:       T6 T9 T10 
799        1/1                      st_d = StAddress;
           Tests:       T6 T10 T16 
800                     
801        1/1                      addr_set_d = 1'b 1;
           Tests:       T6 T10 T16 
802        1/1                    end else if (cmd_info_d.dummy_en) begin
           Tests:       T6 T9 T17 
803        1/1                      st_d = StHighZ;
           Tests:       T57 T58 T59 
804                     
805        1/1                      dummy_set = 1'b 1;
           Tests:       T57 T58 T59 
806        1/1                      dummycnt_d = cmd_info_d.dummy_size;
           Tests:       T57 T58 T59 
807        1/1                    end else if (cmd_info_d.payload_en != 0) begin
           Tests:       T6 T9 T17 
808                                 // Any input/output payload
809        1/1                      if (cmd_info_d.payload_dir == PayloadOut) begin
           Tests:       T6 T9 T17 
810        1/1                        st_d = StWait;
           Tests:       T6 T17 T18 
811                                 end else begin
812        1/1                        st_d = StDriving;
           Tests:       T9 T19 T60 
813                     
814        1/1                        payload_replace_set = 1'b 1;
           Tests:       T9 T19 T60 
815                                 end
816                               end
                        MISSING_ELSE
817                             end // cmd_8th && cmd_info_d.valid
818        1/1                  else if (cmd_8th) begin
           Tests:       T6 T9 T10 
819                               // cmd_info_d.valid is 0. Skip current transaction
820        1/1                    st_d = StFilter;
           Tests:       T9 T16 T17 
821        1/1                    filter = 1'b 1;
           Tests:       T9 T16 T17 
822                             end
                        MISSING_ELSE
823                           end
824                     
825                           StMByte: begin
826        0/1     ==>          if (mbytecnt_zero) begin
827        0/1     ==>            st_d = StHighZ;
828                     
829        0/1     ==>            dummy_set = 1'b 1;
830        0/1     ==>            dummycnt_d = cmd_info_d.dummy_size;
831                             end else begin
832        0/1     ==>            st_d = StMByte;
833                             end
834                           end
835                     
836                           StFilter: begin
837                             // Command is filtered. Wait until reset(CSb) comes.
838        1/1                  st_d = StFilter;
           Tests:       T6 T9 T10 
839        1/1                  host_s_en_inclk   = 4'h 0; // explicit
           Tests:       T6 T9 T10 
840        1/1                  device_s_en_inclk = 4'h 0;
           Tests:       T6 T9 T10 
841                           end
842                     
843                           StWait: begin
844                             // Device Returns Data to host
845        1/1                  st_d = StWait;
           Tests:       T6 T16 T17 
846                     
847                             // output enable for host
848        1/1                  host_s_en_inclk = cmd_info.payload_en;
           Tests:       T6 T16 T17 
849        1/1                  device_s_en_inclk = 4'h 0;
           Tests:       T6 T16 T17 
850                           end
851                     
852                           StDriving: begin
853                             // Host sends Data to device
854        1/1                  st_d = StDriving;
           Tests:       T9 T10 T19 
855                     
856                             // Output enable for device
857        1/1                  host_s_en_inclk   = 4'h 0; // explicit
           Tests:       T9 T10 T19 
858        1/1                  device_s_en_inclk = cmd_info.payload_en;
           Tests:       T9 T10 T19 
859                           end
860                     
861                           StHighZ: begin
862        1/1                  host_s_en_inclk   = 4'h 0; // explicit
           Tests:       T6 T16 T17 
863        1/1                  device_s_en_inclk = 4'h 0; // float
           Tests:       T6 T16 T17 
864        1/1                  if (dummycnt_zero && (cmd_info.payload_dir == PayloadOut)) begin
           Tests:       T6 T16 T17 
865                               // Assume payload_en not 0
866        1/1                    st_d = StWait;
           Tests:       T6 T16 T17 
867        1/1                  end else if (dummycnt_zero && (cmd_info.payload_dir == PayloadIn)) begin
           Tests:       T6 T16 T17 
868        0/1     ==>            st_d = StDriving;
869                     
870        0/1     ==>            payload_replace_set = 1'b 1;
871                             end
                        MISSING_ELSE
872                           end
873                     
874                           StAddress: begin
875                             // based on state, addr_phase is set. So just check if counter reaches 0
876        1/1                  if (addrcnt_outclk == '0) begin
           Tests:       T6 T10 T16 
877        1/1                    if (cmd_info.mbyte_en) begin
           Tests:       T6 T10 T16 
878        0/1     ==>              st_d = StMByte;
879                     
880        0/1     ==>              mbyte_set = 1'b 1;
881        1/1                    end else if (cmd_info.dummy_en) begin
           Tests:       T6 T10 T16 
882        1/1                      st_d = StHighZ;
           Tests:       T6 T16 T17 
883                     
884        1/1                      dummy_set = 1'b 1;
           Tests:       T6 T16 T17 
885        1/1                      dummycnt_d = cmd_info.dummy_size;
           Tests:       T6 T16 T17 
886        1/1                    end else if (cmd_info.payload_en != 0
           Tests:       T10 T17 T20 
887                                            && (cmd_info.payload_dir == PayloadOut)) begin
888        1/1                      st_d = StWait;
           Tests:       T39 T55 T61 
889        1/1                    end else if (cmd_info.payload_en != 0
           Tests:       T10 T17 T20 
890                                            && (cmd_info.payload_dir == PayloadIn)) begin
891        1/1                      st_d = StDriving;
           Tests:       T10 T20 T56 
892                     
893        1/1                      payload_replace_set = 1'b 1;
           Tests:       T10 T20 T56 
894                               end else begin
895                                 // Addr completed command. goto wait state
896        1/1                      st_d = StWait;
           Tests:       T17 T62 T63 
897                               end
898                             end
                        MISSING_ELSE
899                           end
900                     
901                           default: begin
902                             st_d = StIdle;

---

Cond Coverage for Module : spi_passthrough

	Total	Covered	Percent
Conditions	97	86	88.66
Logical	97	86	88.66
Non-Logical	0	0
Event	0	0

 LINE       271
 EXPRESSION (spi_mode_i == PassThrough)
            -------------1-------------

-1-	Status	Tests
0	Covered	T1,T2,T3
1	Covered	T6,T9,T10

 LINE       355
 SUB-EXPRESSION (filter | csb_deassert)
                 ---1--   ------2-----

-1-	-2-	Status	Tests
0	0	Covered	T1,T2,T3
0	1	Covered	T6,T9,T10
1	0	Covered	T6,T9,T10

 LINE       362
 EXPRESSION (bitcnt != '1)
            -------1------

-1-	Status	Tests
0	Covered	T6,T9,T10
1	Covered	T6,T9,T10

 LINE       372
 EXPRESSION (bitcnt == 6'(6))
            --------1--------

-1-	Status	Tests
0	Covered	T1,T2,T3
1	Covered	T6,T9,T10

 LINE       373
 EXPRESSION (bitcnt == 6'(7))
            --------1--------

-1-	Status	Tests
0	Covered	T1,T2,T3
1	Covered	T6,T9,T10

 LINE       404
 EXPRESSION (cmd_info_i[i].opcode == {opcode_d[6:0], 1'b1})
            -----------------------1-----------------------

-1-	Status	Tests
0	Covered	T6,T9,T10
1	Covered	T6,T9,T10

 LINE       406
 EXPRESSION (cmd_info_i[i].opcode == {opcode_d[6:0], 1'b0})
            -----------------------1-----------------------

-1-	Status	Tests
0	Covered	T6,T9,T10
1	Covered	T6,T9,T17

 LINE       467
 EXPRESSION (addr_mode == Addr4B)
            ----------1----------

-1-	Status	Tests
0	Covered	T1,T2,T3
1	Covered	T10,T16,T17

 LINE       475
 EXPRESSION (st == StAddress)
            --------1--------

-1-	Status	Tests
0	Covered	T1,T2,T3
1	Covered	T6,T10,T16

 LINE       490
 EXPRESSION (addrcnt_outclk != '0)
            -----------1----------

-1-	Status	Tests
0	Covered	T6,T9,T10
1	Covered	T6,T10,T16

 LINE       497
 EXPRESSION (cfg_addr_mask_i[addrcnt_outclk] ? cfg_addr_value_i[addrcnt_outclk] : host_s_i[0])
             ---------------1---------------

-1-	Status	Tests
0	Covered	T1,T2,T3
1	Covered	T6,T9,T10

 LINE       522
 EXPRESSION ((payloadcnt != '0) && payload_replace)
             ---------1--------    -------2-------

-1-	-2-	Status	Tests
0	1	Covered	T10,T20,T56
1	0	Covered	T6,T9,T10
1	1	Covered	T10,T20,T56

 LINE       522
 SUB-EXPRESSION (payloadcnt != '0)
                ---------1--------

-1-	Status	Tests
0	Covered	T10,T20,T56
1	Covered	T6,T9,T10

 LINE       543
 EXPRESSION (payloadcnt == '0)
            ---------1--------

-1-	Status	Tests
0	Covered	T1,T2,T3
1	Covered	T10,T20,T56

 LINE       546
 EXPRESSION (cfg_payload_mask_i[payloadcnt_outclk] ? cfg_payload_data_i[payloadcnt_outclk] : host_s_i[0])
             ------------------1------------------

-1-	Status	Tests
0	Covered	T1,T2,T3
1	Covered	T9,T10,T12

 LINE       570
 EXPRESSION (addr_phase_outclk & cmd_info_addr_swap_en_outclk)
             --------1--------   --------------2-------------

-1-	-2-	Status	Tests
0	1	Covered	T10,T18,T56
1	0	Covered	T6,T16,T17
1	1	Covered	T10,T18,T56

 LINE       572
 EXPRESSION (payload_replace_outclk & cmd_info_payload_swap_en_outclk)
             -----------1----------   ---------------2---------------

-1-	-2-	Status	Tests
0	1	Covered	T10,T56,T62
1	0	Covered	T9,T19,T20
1	1	Covered	T10,T56,T62

 LINE       575
 EXPRESSION (addr_swap_en | payload_swap_en)
             ------1-----   -------2-------

-1-	-2-	Status	Tests
0	0	Covered	T1,T2,T3
0	1	Covered	T10,T56,T62
1	0	Covered	T10,T18,T56

 LINE       576
 EXPRESSION (addr_swap_en ? addr_swap : payload_swap)
             ------1-----

-1-	Status	Tests
0	Covered	T1,T2,T3
1	Covered	T10,T18,T56

 LINE       585
 EXPRESSION (st == StHighZ)
            -------1-------

-1-	Status	Tests
0	Covered	T6,T9,T10
1	Covered	T6,T16,T17

 LINE       589
 EXPRESSION (dummycnt == '0)
            --------1-------

-1-	Status	Tests
0	Covered	T1,T2,T3
1	Covered	T1,T2,T3

 LINE       600
 EXPRESSION (st == StMByte)
            -------1-------

-1-	Status	Tests
0	Covered	T6,T9,T10
1	Not Covered

 LINE       604
 EXPRESSION (mbyte_cnt == '0)
            --------1--------

-1-	Status	Tests
0	Covered	T1,T2,T3
1	Covered	T1,T2,T3

 LINE       609
 EXPRESSION (swap_en ? ({host_s_i[3:1], swap_data}) : host_s_i)
             ---1---

-1-	Status	Tests
0	Covered	T1,T2,T3
1	Covered	T10,T18,T56

 LINE       734
 EXPRESSION (host_csb_i | csb_deassert_outclk)
             -----1----   ---------2---------

-1-	-2-	Status	Tests
0	0	Covered	T1,T6,T9
0	1	Covered	T6,T9,T10
1	0	Covered	T1,T2,T3

 LINE       737
 EXPRESSION (is_active && ((!passthrough_block_i)))
             ----1----    ------------2-----------

-1-	-2-	Status	Tests
0	1	Covered	T1,T2,T3
1	0	Covered	T20,T60,T62
1	1	Covered	T6,T9,T10

 LINE       782
 EXPRESSION (cmd_8th && cmd_filter[host_s_i[0]])
             ---1---    -----------2-----------

-1-	-2-	Status	Tests
0	1	Not Covered
1	0	Covered	T6,T9,T10
1	1	Covered	T6,T9,T10

 LINE       787
 EXPRESSION (cmd_8th && cmd_info_d.valid)
             ---1---    --------2-------

-1-	-2-	Status	Tests
0	1	Not Covered
1	0	Covered	T9,T16,T17
1	1	Covered	T6,T9,T10

 LINE       798
 EXPRESSION (cmd_info_d.addr_mode != AddrDisabled)
            -------------------1------------------

-1-	Status	Tests
0	Covered	T6,T9,T17
1	Covered	T6,T10,T16

 LINE       807
 EXPRESSION (cmd_info_d.payload_en != 4'b0)
            ---------------1---------------

-1-	Status	Tests
0	Covered	T6,T64,T65
1	Covered	T6,T9,T17

 LINE       809
 EXPRESSION (cmd_info_d.payload_dir == PayloadOut)
            -------------------1------------------

-1-	Status	Tests
0	Covered	T9,T19,T60
1	Covered	T6,T17,T18

 LINE       864
 EXPRESSION (dummycnt_zero && (cmd_info.payload_dir == PayloadOut))
             ------1------    ------------------2-----------------

-1-	-2-	Status	Tests
0	1	Covered	T6,T16,T17
1	0	Not Covered
1	1	Covered	T6,T16,T17

 LINE       864
 SUB-EXPRESSION (cmd_info.payload_dir == PayloadOut)
                ------------------1-----------------

-1-	Status	Tests
0	Not Covered
1	Covered	T6,T16,T17

 LINE       867
 EXPRESSION (dummycnt_zero && (cmd_info.payload_dir == PayloadIn))
             ------1------    -----------------2-----------------

-1-	-2-	Status	Tests
0	1	Not Covered
1	0	Not Covered
1	1	Not Covered

 LINE       867
 SUB-EXPRESSION (cmd_info.payload_dir == PayloadIn)
                -----------------1-----------------

-1-	Status	Tests
0	Covered	T6,T16,T17
1	Not Covered

 LINE       876
 EXPRESSION (addrcnt_outclk == '0)
            -----------1----------

-1-	Status	Tests
0	Covered	T6,T10,T16
1	Covered	T6,T10,T16

 LINE       886
 EXPRESSION ((cmd_info.payload_en != 4'b0) && (cmd_info.payload_dir == PayloadOut))
             --------------1--------------    ------------------2-----------------

-1-	-2-	Status	Tests
0	1	Covered	T17,T62,T63
1	0	Covered	T10,T20,T56
1	1	Covered	T39,T55,T61

 LINE       886
 SUB-EXPRESSION (cmd_info.payload_en != 4'b0)
                --------------1--------------

-1-	Status	Tests
0	Covered	T17,T62,T63
1	Covered	T10,T20,T39

 LINE       886
 SUB-EXPRESSION (cmd_info.payload_dir == PayloadOut)
                ------------------1-----------------

-1-	Status	Tests
0	Covered	T10,T20,T56
1	Covered	T17,T39,T55

 LINE       889
 EXPRESSION ((cmd_info.payload_en != 4'b0) && (cmd_info.payload_dir == PayloadIn))
             --------------1--------------    -----------------2-----------------

-1-	-2-	Status	Tests
0	1	Not Covered
1	0	Not Covered
1	1	Covered	T10,T20,T56

 LINE       889
 SUB-EXPRESSION (cmd_info.payload_en != 4'b0)
                --------------1--------------

-1-	Status	Tests
0	Covered	T17,T62,T63
1	Covered	T10,T20,T56

 LINE       889
 SUB-EXPRESSION (cmd_info.payload_dir == PayloadIn)
                -----------------1-----------------

-1-	Status	Tests
0	Covered	T17,T62,T63
1	Covered	T10,T20,T56

---

FSM Coverage for Module : spi_passthrough

Summary for FSM :: st

	Total	Covered	Percent
States	7	6	85.71	(Not included in score)
Transitions	12	9	75.00
Sequences	0	0

State, Transition and Sequence Details for FSM :: st

---

states	Line No.	Covered	Tests
StAddress	799	Covered	T6,T10,T16
StDriving	812	Covered	T9,T10,T19
StFilter	783	Covered	T6,T9,T10
StHighZ	803	Covered	T6,T16,T17
StIdle	781	Covered	T1,T2,T3
StMByte	832	Not Covered
StWait	810	Covered	T6,T16,T17

transitions	Line No.	Covered	Tests
StAddress->StDriving	891	Covered	T10,T20,T56
StAddress->StHighZ	882	Covered	T6,T16,T17
StAddress->StMByte	878	Not Covered
StAddress->StWait	888	Covered	T17,T39,T55
StHighZ->StDriving	868	Not Covered
StHighZ->StWait	866	Covered	T6,T16,T17
StIdle->StAddress	799	Covered	T6,T10,T16
StIdle->StDriving	812	Covered	T9,T19,T60
StIdle->StFilter	783	Covered	T6,T9,T10
StIdle->StHighZ	803	Covered	T57,T58,T59
StIdle->StWait	810	Covered	T6,T17,T18
StMByte->StHighZ	827	Not Covered

---

Branch Coverage for Module : spi_passthrough

	Line No.	Total	Covered	Percent
Branches		96	89	92.71
TERNARY	497	2	2	100.00
TERNARY	546	2	2	100.00
TERNARY	576	2	2	100.00
TERNARY	609	2	2	100.00
IF	336	3	3	100.00
IF	345	3	3	100.00
IF	349	2	2	100.00
IF	360	3	3	100.00
IF	376	3	3	100.00
IF	401	2	2	100.00
IF	414	3	3	100.00
IF	425	3	3	100.00
IF	451	2	2	100.00
IF	467	2	2	100.00
IF	478	2	2	100.00
IF	486	4	4	100.00
IF	506	2	2	100.00
IF	520	3	3	100.00
IF	528	2	2	100.00
IF	533	4	4	100.00
IF	539	2	2	100.00
IF	561	2	2	100.00
IF	582	4	4	100.00
IF	596	4	2	50.00
IF	613	2	2	100.00
CASE	693	3	3	100.00
IF	713	2	2	100.00
IF	745	2	2	100.00
CASE	778	24	19	79.17

497          assign addr_swap = cfg_addr_mask_i[addrcnt_outclk]
                                                               
498                           ? cfg_addr_value_i[addrcnt_outclk]
                              -1-  
                              ==>  
                              ==>  

Branches:

-1-	Status	Tests
1	Covered	T6,T9,T10
0	Covered	T1,T2,T3

546          assign payload_swap = cfg_payload_mask_i[payloadcnt_outclk]
                                                                        
547                              ? cfg_payload_data_i[payloadcnt_outclk]
                                 -1-  
                                 ==>  
                                 ==>  

Branches:

-1-	Status	Tests
1	Covered	T9,T10,T12
0	Covered	T1,T2,T3

576          assign swap_data = (addr_swap_en) ? addr_swap : payload_swap ;
                                               -1-  
                                               ==>  
                                               ==>  

Branches:

-1-	Status	Tests
1	Covered	T10,T18,T56
0	Covered	T1,T2,T3

609          assign passthrough_o.s = (swap_en) ? {host_s_i[3:1], swap_data} : host_s_i ;
                                                -1-  
                                                ==>  
                                                ==>  

Branches:

-1-	Status	Tests
1	Covered	T10,T18,T56
0	Covered	T1,T2,T3

336            if (!rst_ni) begin
               -1-  
337              opcode <= 8'h 00;
                 ==>
338            end else if (bitcnt < MetaBitCntW'(8)) begin
                        -2-  
339              opcode <= opcode_d;
                 ==>
340            end
               MISSING_ELSE
               ==>

Branches:

-1-	-2-	Status	Tests
1	-	Covered	T1,T2,T3
0	1	Covered	T6,T9,T10
0	0	Covered	T6,T9,T10

345            if (!rst_ni)     csb_deassert <= 1'b 0;
               -1-  
               ==>
346            else if (filter) csb_deassert <= 1'b 1;
                    -2-  
               ==>
               MISSING_ELSE
               ==>

Branches:

-1-	-2-	Status	Tests
1	-	Covered	T1,T2,T3
0	1	Covered	T6,T9,T10
0	0	Covered	T6,T9,T10

349            if (!rst_out_ni) csb_deassert_outclk <= 1'b 0;
               -1-  
               ==>
350            else             csb_deassert_outclk <= csb_deassert;
               ==>

Branches:

-1-	Status	Tests
1	Covered	T1,T2,T3
0	Covered	T6,T9,T10

360            if (!rst_ni) begin
               -1-  
361              bitcnt <= '0;
                 ==>
362            end else if (bitcnt != '1) begin
                        -2-  
363              bitcnt <= bitcnt + MetaBitCntW'(1);
                 ==>
364            end
               MISSING_ELSE
               ==>

Branches:

-1-	-2-	Status	Tests
1	-	Covered	T1,T2,T3
0	1	Covered	T6,T9,T10
0	0	Covered	T6,T9,T10

376            if (!rst_ni) begin
               -1-  
377              cmd_filter <= 2'b 00;
                 ==>
378            end else if (cmd_7th) begin
                        -2-  
379              // In this 7th beat, cmd_filter latches 2 bits from cfg_cmd_filter_i
380              // This reduces the last filter datapath from muxing 256 to just mux2
381              //
382              // If below syntax does not work, it can be replaced with
383              // for (int unsigned i = 0 ; i < 128 ; i++) begin
384              //   it (i == opcode[6:0]) cmd_filter <= cfg_cmd_filter_i[2*i+:2];
385              // end
386              cmd_filter <= cfg_cmd_filter_i[{opcode_d[6:0],1'b0}+:2];
                 ==>
387            end
               MISSING_ELSE
               ==>

Branches:

-1-	-2-	Status	Tests
1	-	Covered	T1,T2,T3
0	1	Covered	T6,T9,T10
0	0	Covered	T6,T9,T10

401            if (cmd_7th) begin
               -1-  
402              for(int unsigned i = 0 ; i < NumTotalCmdInfo ; i++) begin
                 ==>
403                if (cmd_info_i[i].valid) begin
404                  if (cmd_info_i[i].opcode == {opcode_d[6:0], 1'b1}) begin
405                    cmd_info_7th_d[1] = cmd_info_i[i];
406                  end else if (cmd_info_i[i].opcode == {opcode_d[6:0], 1'b0}) begin
407                    cmd_info_7th_d[0] = cmd_info_i[i];
408                  end
409                end // cmd_info_i[i].valid
410              end
411            end
               MISSING_ELSE
               ==>

Branches:

-1-	Status	Tests
1	Covered	T6,T9,T10
0	Covered	T1,T2,T3

414            if (!rst_ni) begin
               -1-  
415              cmd_info_7th <= '0;
                 ==>
416            end else if (cmd_7th) begin
                        -2-  
417              // Search two candidate among NumCmdInfo. If only one matched, other
418              // cmd_info is Always Input command.
419              cmd_info_7th <= cmd_info_7th_d;
                 ==>
420              //cmd_info_7th <= {PassThroughCmdInfo[{opcode_d[6:0],1'b1}],
421              //                 PassThroughCmdInfo[{opcode_d[6:0],1'b0}]};
422            end
               MISSING_ELSE
               ==>

Branches:

-1-	-2-	Status	Tests
1	-	Covered	T1,T2,T3
0	1	Covered	T6,T9,T10
0	0	Covered	T6,T9,T10

425            if (!rst_ni) begin
               -1-  
426              cmd_info <= '0;
                 ==>
427            end else if (cmd_info_latch) begin
                        -2-  
428              // Latch only two cmd_info when the 7th bit arrives. Then select among two
429              // at the 8th beat for cmd_info_d to reduce timing.
430              cmd_info <= cmd_info_d;
                 ==>
431            end
               MISSING_ELSE
               ==>

Branches:

-1-	-2-	Status	Tests
1	-	Covered	T1,T2,T3
0	1	Covered	T6,T9,T10
0	0	Covered	T6,T9,T10

451            if (cmd_8th) begin
               -1-  
452              // Latch only two cmd_info when the 7th bit arrives. Then select among two
453              // at the 8th beat for cmd_info_d to reduce timing.
454              cmd_info_d = cmd_info_7th[host_s_i[0]];
                 ==>
455        
456              cmd_info_d.opcode = opcode_d;
457        
458              // dummy_size is set inside State Machine
459            end
               MISSING_ELSE
               ==>

Branches:

-1-	Status	Tests
1	Covered	T6,T9,T10
0	Covered	T1,T2,T3

467            if (addr_mode == Addr4B) begin
               -1-  
468              addr_size_d = AddrCntW'(31);
                 ==>
469            end
               MISSING_ELSE
               ==>

Branches:

-1-	Status	Tests
1	Covered	T10,T16,T17
0	Covered	T1,T2,T3

478            if (!rst_ni) begin
               -1-  
479              addr_set_q <= '0;
                 ==>
480            end else begin
481              addr_set_q <= addr_set_d;
                 ==>

Branches:

-1-	Status	Tests
1	Covered	T1,T2,T3
0	Covered	T6,T9,T10

486            if (!rst_out_ni) begin
               -1-  
487              addrcnt_outclk <= '0;
                 ==>
488            end else if (addr_set_q) begin
                        -2-  
489              addrcnt_outclk <= addr_size_d;
                 ==>
490            end else if (addrcnt_outclk != '0) begin
                        -3-  
491              addrcnt_outclk <= addrcnt_outclk - AddrCntW'(1);
                 ==>
492            end
               MISSING_ELSE
               ==>

Branches:

-1-	-2-	-3-	Status	Tests
1	-	-	Covered	T1,T2,T3
0	1	-	Covered	T6,T10,T16
0	0	1	Covered	T6,T10,T16
0	0	0	Covered	T6,T9,T10

506            if (!rst_out_ni) addr_phase_outclk <= 1'b 0;
               -1-  
               ==>
507            else             addr_phase_outclk <= addr_phase;
               ==>

Branches:

-1-	Status	Tests
1	Covered	T1,T2,T3
0	Covered	T6,T9,T10

520            if (!rst_ni) begin
               -1-  
521              payloadcnt <= 5'h 1F;
                 ==>
522            end else if ((payloadcnt != '0) && payload_replace) begin
                        -2-  
523              payloadcnt <= payloadcnt - 1'b 1;
                 ==>
524            end
               MISSING_ELSE
               ==>

Branches:

-1-	-2-	Status	Tests
1	-	Covered	T1,T2,T3
0	1	Covered	T10,T20,T56
0	0	Covered	T6,T9,T10

528            if (!rst_out_ni) payloadcnt_outclk <= 5'h 1F;
               -1-  
               ==>
529            else             payloadcnt_outclk <= payloadcnt;
               ==>

Branches:

-1-	Status	Tests
1	Covered	T1,T2,T3
0	Covered	T6,T9,T10

533            if (!rst_ni)                  payload_replace <= 1'b 0;
               -1-  
               ==>
534            else if (payload_replace_set) payload_replace <= 1'b 1;
                    -2-  
               ==>
535            else if (payload_replace_clr) payload_replace <= 1'b 0;
                    -3-  
               ==>
               MISSING_ELSE
               ==>

Branches:

-1-	-2-	-3-	Status	Tests
1	-	-	Covered	T1,T2,T3
0	1	-	Covered	T9,T10,T19
0	0	1	Covered	T10,T20,T56
0	0	0	Covered	T6,T9,T10

539            if (!rst_out_ni) payload_replace_outclk <= 1'b 0;
               -1-  
               ==>
540            else             payload_replace_outclk <= payload_replace;
               ==>

Branches:

-1-	Status	Tests
1	Covered	T1,T2,T3
0	Covered	T6,T9,T10

561            if (!rst_out_ni) begin
               -1-  
562              cmd_info_addr_swap_en_outclk    <= 1'b 0;
                 ==>
563              cmd_info_payload_swap_en_outclk <= 1'b 0;
564            end else begin
565              cmd_info_addr_swap_en_outclk    <= cmd_info.addr_swap_en;
                 ==>

Branches:

-1-	Status	Tests
1	Covered	T1,T2,T3
0	Covered	T6,T9,T10

582            if (!rst_ni) dummycnt <= '0;
               -1-  
               ==>
583            else if (dummy_set) begin
                    -2-  
584              dummycnt <= dummycnt_d;
                 ==>
585            end else if (st == StHighZ) begin
                        -3-  
586              dummycnt <= dummycnt - 1'b 1;
                 ==>
587            end
               MISSING_ELSE
               ==>

Branches:

-1-	-2-	-3-	Status	Tests
1	-	-	Covered	T1,T2,T3
0	1	-	Covered	T6,T16,T17
0	0	1	Covered	T6,T16,T17
0	0	0	Covered	T6,T9,T10

596            if (!rst_ni) begin
               -1-  
597              mbyte_cnt <= '0;
                 ==>
598            end else if (mbyte_set) begin
                        -2-  
599              mbyte_cnt <= 2'h 3;
                 ==>
600            end else if (st == StMByte) begin
                        -3-  
601              mbyte_cnt <= mbyte_cnt - 1'b 1;
                 ==>
602            end
               MISSING_ELSE
               ==>

Branches:

-1-	-2-	-3-	Status	Tests
1	-	-	Covered	T1,T2,T3
0	1	-	Not Covered
0	0	1	Not Covered
0	0	0	Covered	T6,T9,T10

613            if (!rst_out_ni) passthrough_s_en <= 4'h 1; // S[0] active by default
               -1-  
               ==>
614            else             passthrough_s_en <= device_s_en_inclk;
               ==>

Branches:

-1-	Status	Tests
1	Covered	T1,T2,T3
0	Covered	T6,T9,T10

693            unique case (cmd_info.read_pipeline_mode)
                      -1-  
694              RdPipeTwoStageFullCycle: begin
695                host_s_o = read_pipeline_stg2_q;
                   ==>
696                read_pipeline_stg1_d = passthrough_i.s;
697                host_s_en_muxed = read_pipeline_oe_stg2_q;
698              end
699              RdPipeTwoStageHalfCycle: begin
700                host_s_o = read_pipeline_stg2_q;
                   ==>
701                read_pipeline_stg1_d = half_cycle_sampled_sd;
702                host_s_en_muxed = read_pipeline_oe_stg2_q;
703              end
704              default: begin
705                host_s_o = passthrough_i.s;
                   ==>

Branches:

-1-	Status	Tests
RdPipeTwoStageFullCycle	Covered	T20,T39,T55
RdPipeTwoStageHalfCycle	Covered	T16,T17,T39
default	Covered	T1,T2,T3

713            if (!rst_out_ni) host_s_en_o <= '0; // input mode
               -1-  
               ==>
714            else             host_s_en_o <= host_s_en_muxed;
               ==>

Branches:

-1-	Status	Tests
1	Covered	T1,T2,T3
0	Covered	T6,T9,T10

745            if (!rst_ni) begin
               -1-  
746              st <= StIdle;
                 ==>
747            end else begin
748              st <= st_d;
                 ==>

Branches:

-1-	Status	Tests
1	Covered	T1,T2,T3
0	Covered	T6,T9,T10

778            unique case (st)
                      -1-  
779              StIdle: begin
780                if (!is_active) begin
                   -2-  
781                  st_d = StIdle;
                     ==>
782                end else if (cmd_8th && cmd_filter[host_s_i[0]]) begin
                            -3-  
783                  st_d = StFilter;
                     ==>
784                  filter = 1'b 1;
785        
786                  // Send notification event to SW
787                end else if (cmd_8th && cmd_info_d.valid) begin
                            -4-  
788                  cmd_info_latch = 1'b 1;
789        
790                  // Divert to multiple states.
791                  //
792                  // The following states are mainly for controlling the output enable
793                  // signals. StAddress state, however, controls the SPI lines for
794                  // address swap in case of Read Commands.
795                  //
796                  // Order: addr_mode , dummy_en, |payload_en
797                  // Note that no direct transition to MByte state.
798                  if (cmd_info_d.addr_mode != AddrDisabled) begin
                     -5-  
799                    st_d = StAddress;
                       ==>
800        
801                    addr_set_d = 1'b 1;
802                  end else if (cmd_info_d.dummy_en) begin
                              -6-  
803                    st_d = StHighZ;
                       ==>
804        
805                    dummy_set = 1'b 1;
806                    dummycnt_d = cmd_info_d.dummy_size;
807                  end else if (cmd_info_d.payload_en != 0) begin
                              -7-  
808                    // Any input/output payload
809                    if (cmd_info_d.payload_dir == PayloadOut) begin
                       -8-  
810                      st_d = StWait;
                         ==>
811                    end else begin
812                      st_d = StDriving;
                         ==>
813        
814                      payload_replace_set = 1'b 1;
815                    end
816                  end
                     MISSING_ELSE
                     ==>
817                end // cmd_8th && cmd_info_d.valid
818                else if (cmd_8th) begin
                        -9-  
819                  // cmd_info_d.valid is 0. Skip current transaction
820                  st_d = StFilter;
                     ==>
821                  filter = 1'b 1;
822                end
                   MISSING_ELSE
                   ==>
823              end
824        
825              StMByte: begin
826                if (mbytecnt_zero) begin
                   -10-  
827                  st_d = StHighZ;
                     ==>
828        
829                  dummy_set = 1'b 1;
830                  dummycnt_d = cmd_info_d.dummy_size;
831                end else begin
832                  st_d = StMByte;
                     ==>
833                end
834              end
835        
836              StFilter: begin
837                // Command is filtered. Wait until reset(CSb) comes.
838                st_d = StFilter;
                   ==>
839                host_s_en_inclk   = 4'h 0; // explicit
840                device_s_en_inclk = 4'h 0;
841              end
842        
843              StWait: begin
844                // Device Returns Data to host
845                st_d = StWait;
                   ==>
846        
847                // output enable for host
848                host_s_en_inclk = cmd_info.payload_en;
849                device_s_en_inclk = 4'h 0;
850              end
851        
852              StDriving: begin
853                // Host sends Data to device
854                st_d = StDriving;
                   ==>
855        
856                // Output enable for device
857                host_s_en_inclk   = 4'h 0; // explicit
858                device_s_en_inclk = cmd_info.payload_en;
859              end
860        
861              StHighZ: begin
862                host_s_en_inclk   = 4'h 0; // explicit
863                device_s_en_inclk = 4'h 0; // float
864                if (dummycnt_zero && (cmd_info.payload_dir == PayloadOut)) begin
                   -11-  
865                  // Assume payload_en not 0
866                  st_d = StWait;
                     ==>
867                end else if (dummycnt_zero && (cmd_info.payload_dir == PayloadIn)) begin
                            -12-  
868                  st_d = StDriving;
                     ==>
869        
870                  payload_replace_set = 1'b 1;
871                end
                   MISSING_ELSE
                   ==>
872              end
873        
874              StAddress: begin
875                // based on state, addr_phase is set. So just check if counter reaches 0
876                if (addrcnt_outclk == '0) begin
                   -13-  
877                  if (cmd_info.mbyte_en) begin
                     -14-  
878                    st_d = StMByte;
                       ==>
879        
880                    mbyte_set = 1'b 1;
881                  end else if (cmd_info.dummy_en) begin
                              -15-  
882                    st_d = StHighZ;
                       ==>
883        
884                    dummy_set = 1'b 1;
885                    dummycnt_d = cmd_info.dummy_size;
886                  end else if (cmd_info.payload_en != 0
                              -16-  
887                               && (cmd_info.payload_dir == PayloadOut)) begin
888                    st_d = StWait;
                       ==>
889                  end else if (cmd_info.payload_en != 0
                              -17-  
890                               && (cmd_info.payload_dir == PayloadIn)) begin
891                    st_d = StDriving;
                       ==>
892        
893                    payload_replace_set = 1'b 1;
894                  end else begin
895                    // Addr completed command. goto wait state
896                    st_d = StWait;
                       ==>
897                  end
898                end
                   MISSING_ELSE
                   ==>
899              end
900        
901              default: begin
902                st_d = StIdle;
                   ==>

Branches:

-1-	-2-	-3-	-4-	-5-	-6-	-7-	-8-	-9-	-10-	-11-	-12-	-13-	-14-	-15-	-16-	-17-	Status	Tests
StIdle	1	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	Covered	T1,T2,T3
StIdle	0	1	-	-	-	-	-	-	-	-	-	-	-	-	-	-	Covered	T6,T9,T10
StIdle	0	0	1	1	-	-	-	-	-	-	-	-	-	-	-	-	Covered	T6,T10,T16
StIdle	0	0	1	0	1	-	-	-	-	-	-	-	-	-	-	-	Covered	T57,T58,T59
StIdle	0	0	1	0	0	1	1	-	-	-	-	-	-	-	-	-	Covered	T6,T17,T18
StIdle	0	0	1	0	0	1	0	-	-	-	-	-	-	-	-	-	Covered	T9,T19,T60
StIdle	0	0	1	0	0	0	-	-	-	-	-	-	-	-	-	-	Covered	T6,T64,T65
StIdle	0	0	0	-	-	-	-	1	-	-	-	-	-	-	-	-	Covered	T9,T16,T17
StIdle	0	0	0	-	-	-	-	0	-	-	-	-	-	-	-	-	Covered	T6,T9,T10
StMByte	-	-	-	-	-	-	-	-	1	-	-	-	-	-	-	-	Not Covered
StMByte	-	-	-	-	-	-	-	-	0	-	-	-	-	-	-	-	Not Covered
StFilter	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	Covered	T6,T9,T10
StWait	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	Covered	T6,T16,T17
StDriving	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	Covered	T9,T10,T19
StHighZ	-	-	-	-	-	-	-	-	-	1	-	-	-	-	-	-	Covered	T6,T16,T17
StHighZ	-	-	-	-	-	-	-	-	-	0	1	-	-	-	-	-	Not Covered
StHighZ	-	-	-	-	-	-	-	-	-	0	0	-	-	-	-	-	Covered	T6,T16,T17
StAddress	-	-	-	-	-	-	-	-	-	-	-	1	1	-	-	-	Not Covered
StAddress	-	-	-	-	-	-	-	-	-	-	-	1	0	1	-	-	Covered	T6,T16,T17
StAddress	-	-	-	-	-	-	-	-	-	-	-	1	0	0	1	-	Covered	T39,T55,T61
StAddress	-	-	-	-	-	-	-	-	-	-	-	1	0	0	0	1	Covered	T10,T20,T56
StAddress	-	-	-	-	-	-	-	-	-	-	-	1	0	0	0	0	Covered	T17,T62,T63
StAddress	-	-	-	-	-	-	-	-	-	-	-	0	-	-	-	-	Covered	T6,T10,T16
default	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	Not Covered

---

Assert Coverage for Module : spi_passthrough

	Total	Attempted	Percent	Succeeded/Matched	Percent
Assertions	2	2	100.00	2	100.00
Cover properties	0	0		0
Cover sequences	0	0		0
Total	2	2	100.00	2	100.00

---

Assertion Details

Name	Attempts	Real Successes	Failures	Incomplete
PassThroughStKnown_A	146705487	120576950	0	0
PayloadSwapConstraint_M	146705487	2097344	0	0

PassThroughStKnown_A

Name	Attempts	Real Successes	Failures	Incomplete
Total	146705487	120576950	0	0
T6	5232	5232	0	0
T9	5758	4240	0	0
T10	4176	4176	0	0
T12	12573	12573	0	0
T13	15465	0	0	0
T14	592	0	0	0
T15	33752	33752	0	0
T16	7272	7272	0	0
T17	103604	103072	0	0
T18	0	21680	0	0
T19	0	3728	0	0
T20	0	23836	0	0
T26	46864	0	0	0

PayloadSwapConstraint_M

Name	Attempts	Real Successes	Failures	Incomplete
Total	146705487	2097344	0	0
T10	4176	2080	0	0
T12	12573	0	0	0
T13	15465	0	0	0
T14	592	0	0	0
T15	33752	0	0	0
T16	7272	0	0	0
T17	103604	0	0	0
T18	22560	0	0	0
T19	3728	0	0	0
T26	46864	0	0	0
T36	0	32	0	0
T48	0	8040	0	0
T56	0	64	0	0
T58	0	2072	0	0
T62	0	2080	0	0
T66	0	2800	0	0
T67	0	568	0	0
T68	0	19392	0	0
T69	0	26856	0	0

Line Coverage for Instance : tb.dut.u_passthrough

	Line No.	Total	Covered	Percent
TOTAL		200	189	94.50
CONT_ASSIGN	271	1	1	100.00
CONT_ASSIGN	276	1	1	100.00
CONT_ASSIGN	326	1	1	100.00
CONT_ASSIGN	333	1	1	100.00
ALWAYS	336	4	4	100.00
ALWAYS	345	4	4	100.00
ALWAYS	349	3	3	100.00
CONT_ASSIGN	355	1	1	100.00
ALWAYS	360	4	4	100.00
CONT_ASSIGN	372	1	1	100.00
CONT_ASSIGN	373	1	1	100.00
ALWAYS	376	4	4	100.00
ALWAYS	400	8	8	100.00
ALWAYS	414	4	4	100.00
ALWAYS	425	4	4	100.00
CONT_ASSIGN	439	0	0
ALWAYS	449	4	4	100.00
CONT_ASSIGN	463	1	1	100.00
ALWAYS	466	3	3	100.00
CONT_ASSIGN	475	1	1	100.00
ALWAYS	478	3	3	100.00
ALWAYS	486	6	6	100.00
CONT_ASSIGN	497	1	1	100.00
ALWAYS	506	3	3	100.00
ALWAYS	520	4	4	100.00
ALWAYS	528	3	3	100.00
ALWAYS	533	6	6	100.00
ALWAYS	539	3	3	100.00
CONT_ASSIGN	543	1	1	100.00
CONT_ASSIGN	546	1	1	100.00
ALWAYS	561	5	5	100.00
CONT_ASSIGN	570	1	1	100.00
CONT_ASSIGN	572	1	1	100.00
CONT_ASSIGN	575	1	1	100.00
CONT_ASSIGN	576	1	1	100.00
ALWAYS	582	6	6	100.00
CONT_ASSIGN	589	1	1	100.00
ALWAYS	596	6	4	66.67
CONT_ASSIGN	604	1	1	100.00
CONT_ASSIGN	609	1	1	100.00
ALWAYS	613	3	3	100.00
CONT_ASSIGN	616	1	1	100.00
ALWAYS	685	13	13	100.00
ALWAYS	713	3	3	100.00
CONT_ASSIGN	728	1	1	100.00
CONT_ASSIGN	734	1	1	100.00
CONT_ASSIGN	737	1	1	100.00
ALWAYS	745	3	3	100.00
ALWAYS	753	68	59	86.76

270                       logic is_active;
271        1/1            assign is_active = (spi_mode_i == PassThrough);
           Tests:       T1 T2 T3 
272                     
273                       logic [7:0] opcode, opcode_d;
274                     
275                       logic unused_opcode_7;
276        1/1            assign unused_opcode_7 = opcode[7];
           Tests:       T1 T2 T3 
277                     
278                       // If the filter becomes 1 on the 8th beat, it lowers SCK enable signal to CG
279                       // cell then, at the 8th posedge of SCK, csb_deassert becomes 1.
280                       //                      ____      ____      ____
281                       // SCK             ____/ 7  \____/ 8  \____/
282                       //                             ___
283                       // filter       _______/XXXXXX/   \______________
284                       //              ______________
285                       // sck_gate_en                \__________________
286                       //                                 ______________
287                       // csb_deassert __________________/
288                       logic filter;
289                     
290                       // If 1, SCK propagates to the downstream SPI Flash device.
291                       logic sck_gate_en;
292                     
293                       // CSb to the downstream device control If 1, CSb is de-asserted. This signal
294                       // is glitch sensitive. This value is changed at SCK posedge. This does not
295                       // drive CSb output directly. CSb to downstream is OR-ed with this and CSb
296                       // from host system.
297                       //
298                       // `cdb_deassert` should be latched at the posedge of SCK. `filter` signal is
299                       // computed in between the 7th posedge of SCK and the 8th posedge. As the
300                       // command bit does not arrive until the 7th negedge of SCK, the filter signal
301                       // is not valid in the first half of the period. By latching the filter signal
302                       // at the posedge of the SCK, csb_deassert always shows correct value if the
303                       // command needs to be filtered or not.
304                       //
305                       // However, the CSb output to the downstream flash device is better to be in
306                       // the out clock domain. It helps the design constraints to be simpler. So,
307                       // the `csb_deassert` is again latched at the outclk (which is the negedge of
308                       // SCK).
309                       logic csb_deassert;
310                       logic csb_deassert_outclk;
311                     
312                       // == BEGIN: Counters  ======================================================
313                       // bitcnt to count up to dummy
314                       localparam int unsigned MetaMaxBeat = 8+32+8; // Cmd + Addr + Dummy
315                       localparam int unsigned MetaBitCntW = $clog2(MetaMaxBeat);
316                       logic [MetaBitCntW-1:0] bitcnt;
317                     
318                       // Address or anything host driving after opcode counter
319                       logic [AddrCntW-1:0] addrcnt_outclk;
320                     
321                       // Dummy counter
322                       logic [DummyCntW-1:0] dummycnt, dummycnt_d;
323                       // -- END:   Counters  ------------------------------------------------------
324                     
325                       // event
326        1/1            assign event_cmd_filtered_o = filter;
           Tests:       T1 T2 T3 
327                     
328                       //////////////
329                       // Datapath //
330                       //////////////
331                     
332                       // Opcode Latch
333        1/1            assign opcode_d = {opcode[6:0], host_s_i[0]};
           Tests:       T1 T2 T3 
334                     
335                       always_ff @(posedge clk_i or negedge rst_ni) begin
336        1/1              if (!rst_ni) begin
           Tests:       T1 T2 T3 
337        1/1                opcode <= 8'h 00;
           Tests:       T1 T2 T3 
338        1/1              end else if (bitcnt < MetaBitCntW'(8)) begin
           Tests:       T6 T9 T10 
339        1/1                opcode <= opcode_d;
           Tests:       T6 T9 T10 
340                         end
                        MISSING_ELSE
341                       end
342                     
343                       // Command Filter: CSb control
344                       always_ff @(posedge clk_i or negedge rst_ni) begin
345        2/2              if (!rst_ni)     csb_deassert <= 1'b 0;
           Tests:       T1 T2 T3  | T1 T2 T3 
346        2/2              else if (filter) csb_deassert <= 1'b 1;
           Tests:       T6 T9 T10  | T6 T9 T10 
                        MISSING_ELSE
347                       end
348                       always_ff @(posedge clk_out_i or negedge rst_out_ni) begin
349        2/2              if (!rst_out_ni) csb_deassert_outclk <= 1'b 0;
           Tests:       T1 T2 T3  | T1 T2 T3 
350        1/1              else             csb_deassert_outclk <= csb_deassert;
           Tests:       T6 T9 T10 
351                       end
352                     
353                       // Look at the waveform above to see why sck_gate_en is inversion of fliter OR
354                       // csb_deassert
355        1/1            assign sck_gate_en = ~(filter | csb_deassert);
           Tests:       T1 T2 T3 
356                     
357                       // Bitcnt counter
358                       /// Bitcnt increases until it hit the max value then wait reset.
359                       always_ff @(posedge clk_i or negedge rst_ni) begin
360        1/1              if (!rst_ni) begin
           Tests:       T1 T2 T3 
361        1/1                bitcnt <= '0;
           Tests:       T1 T2 T3 
362        1/1              end else if (bitcnt != '1) begin
           Tests:       T6 T9 T10 
363        1/1                bitcnt <= bitcnt + MetaBitCntW'(1);
           Tests:       T6 T9 T10 
364                         end
                        MISSING_ELSE
365                       end
366                     
367                       // Latch only two bits at 7th cmd opcode
368                       logic cmd_7th; // 7th beat of transaction
369                       logic cmd_8th; // in 8th beat of transaction
370                       logic [1:0] cmd_filter;
371                     
372        1/1            assign cmd_7th = (bitcnt == MetaBitCntW'(6));
           Tests:       T1 T2 T3 
373        1/1            assign cmd_8th = (bitcnt == MetaBitCntW'(7));
           Tests:       T1 T2 T3 
374                     
375                       always_ff @(posedge clk_i or negedge rst_ni) begin
376        1/1              if (!rst_ni) begin
           Tests:       T1 T2 T3 
377        1/1                cmd_filter <= 2'b 00;
           Tests:       T1 T2 T3 
378        1/1              end else if (cmd_7th) begin
           Tests:       T6 T9 T10 
379                           // In this 7th beat, cmd_filter latches 2 bits from cfg_cmd_filter_i
380                           // This reduces the last filter datapath from muxing 256 to just mux2
381                           //
382                           // If below syntax does not work, it can be replaced with
383                           // for (int unsigned i = 0 ; i < 128 ; i++) begin
384                           //   it (i == opcode[6:0]) cmd_filter <= cfg_cmd_filter_i[2*i+:2];
385                           // end
386        1/1                cmd_filter <= cfg_cmd_filter_i[{opcode_d[6:0],1'b0}+:2];
           Tests:       T6 T9 T10 
387                         end
                        MISSING_ELSE
388                       end
389                     
390                       // Command Info Latch
391                       cmd_info_t       cmd_info, cmd_info_d;
392                       cmd_info_t [1:0] cmd_info_7th, cmd_info_7th_d;
393                     
394                       logic [AddrCntW-1:0] addr_size_d;
395                     
396                       logic cmd_info_latch;
397                     
398                       // Search opcode @ 7th opcode
399                       always_comb begin
400        1/1              cmd_info_7th_d = {CmdInfoInput, CmdInfoInput};
           Tests:       T1 T2 T3 
401        1/1              if (cmd_7th) begin
           Tests:       T1 T2 T3 
402        1/1                for(int unsigned i = 0 ; i < NumTotalCmdInfo ; i++) begin
           Tests:       T6 T9 T10 
403        1/1                  if (cmd_info_i[i].valid) begin
           Tests:       T6 T9 T10 
404        1/1                    if (cmd_info_i[i].opcode == {opcode_d[6:0], 1'b1}) begin
           Tests:       T6 T9 T10 
405        1/1                      cmd_info_7th_d[1] = cmd_info_i[i];
           Tests:       T6 T9 T10 
406        1/1                    end else if (cmd_info_i[i].opcode == {opcode_d[6:0], 1'b0}) begin
           Tests:       T6 T9 T10 
407        1/1                      cmd_info_7th_d[0] = cmd_info_i[i];
           Tests:       T6 T9 T17 
408                               end
                        MISSING_ELSE
409                             end // cmd_info_i[i].valid
                        MISSING_ELSE
410                           end
411                         end
                        MISSING_ELSE
412                       end
413                       always_ff @(posedge clk_i or negedge rst_ni) begin
414        1/1              if (!rst_ni) begin
           Tests:       T1 T2 T3 
415        1/1                cmd_info_7th <= '0;
           Tests:       T1 T2 T3 
416        1/1              end else if (cmd_7th) begin
           Tests:       T6 T9 T10 
417                           // Search two candidate among NumCmdInfo. If only one matched, other
418                           // cmd_info is Always Input command.
419        1/1                cmd_info_7th <= cmd_info_7th_d;
           Tests:       T6 T9 T10 
420                           //cmd_info_7th <= {PassThroughCmdInfo[{opcode_d[6:0],1'b1}],
421                           //                 PassThroughCmdInfo[{opcode_d[6:0],1'b0}]};
422                         end
                        MISSING_ELSE
423                       end
424                       always_ff @(posedge clk_i or negedge rst_ni) begin
425        1/1              if (!rst_ni) begin
           Tests:       T1 T2 T3 
426        1/1                cmd_info <= '0;
           Tests:       T1 T2 T3 
427        1/1              end else if (cmd_info_latch) begin
           Tests:       T6 T9 T10 
428                           // Latch only two cmd_info when the 7th bit arrives. Then select among two
429                           // at the 8th beat for cmd_info_d to reduce timing.
430        1/1                cmd_info <= cmd_info_d;
           Tests:       T6 T9 T10 
431                         end
                        MISSING_ELSE
432                       end
433                     
434                       // Some of the fields of cmd_info are used in the big FSM below. The opcode field and the addr_*
435                       // fields are ignored because we pick them from cmd_info_d instead (in a different FSM state). We
436                       // rely on the synthesis tool not to generate the unneeded flops but must explicitly waive lint
437                       // warnings about unused fields.
438                       logic unused_cmd_info_fields;
439        unreachable    assign unused_cmd_info_fields = &{
440                         1'b0,
441                         cmd_info.valid, // valid bit is checked before latching into cmd_info
442                         cmd_info.opcode,
443                         cmd_info.opcode,
444                         cmd_info.upload,
445                         cmd_info.busy
446                       };
447                     
448                       always_comb begin
449        1/1              cmd_info_d = '0;
           Tests:       T1 T2 T3 
450                     
451        1/1              if (cmd_8th) begin
           Tests:       T1 T2 T3 
452                           // Latch only two cmd_info when the 7th bit arrives. Then select among two
453                           // at the 8th beat for cmd_info_d to reduce timing.
454        1/1                cmd_info_d = cmd_info_7th[host_s_i[0]];
           Tests:       T6 T9 T10 
455                     
456        1/1                cmd_info_d.opcode = opcode_d;
           Tests:       T6 T9 T10 
457                     
458                           // dummy_size is set inside State Machine
459                         end
                        MISSING_ELSE
460                       end
461                     
462                       addr_mode_e addr_mode;
463        1/1            assign addr_mode = get_addr_mode(cmd_info.addr_mode, cfg_addr_4b_en_i);
           Tests:       T1 T2 T3 
464                     
465                       always_comb begin
466        1/1              addr_size_d = AddrCntW'(23);
           Tests:       T1 T2 T3 
467        1/1              if (addr_mode == Addr4B) begin
           Tests:       T1 T2 T3 
468        1/1                addr_size_d = AddrCntW'(31);
           Tests:       T10 T16 T17 
469                         end
                        MISSING_ELSE
470                       end
471                     
472                       // Address swap
473                       logic addr_set_d, addr_set_q;
474                       logic addr_phase, addr_phase_outclk;
475        1/1            assign addr_phase = (st == StAddress);
           Tests:       T1 T2 T3 
476                     
477                       always_ff @(posedge clk_i or negedge rst_ni) begin
478        1/1              if (!rst_ni) begin
           Tests:       T1 T2 T3 
479        1/1                addr_set_q <= '0;
           Tests:       T1 T2 T3 
480                         end else begin
481        1/1                addr_set_q <= addr_set_d;
           Tests:       T6 T9 T10 
482                         end
483                       end
484                     
485                       always_ff @(posedge clk_out_i or negedge rst_out_ni) begin
486        1/1              if (!rst_out_ni) begin
           Tests:       T1 T2 T3 
487        1/1                addrcnt_outclk <= '0;
           Tests:       T1 T2 T3 
488        1/1              end else if (addr_set_q) begin
           Tests:       T6 T9 T10 
489        1/1                addrcnt_outclk <= addr_size_d;
           Tests:       T6 T10 T16 
490        1/1              end else if (addrcnt_outclk != '0) begin
           Tests:       T6 T9 T10 
491        1/1                addrcnt_outclk <= addrcnt_outclk - AddrCntW'(1);
           Tests:       T6 T10 T16 
492                         end
                        MISSING_ELSE
493                       end
494                     
495                       // Based on AddrCnt, the logic swap.
496                       logic addr_swap;
497        1/1            assign addr_swap = cfg_addr_mask_i[addrcnt_outclk]
           Tests:       T1 T2 T3 
498                                        ? cfg_addr_value_i[addrcnt_outclk]
499                                        : host_s_i[0];
500                     
501                       // Address swap should happen in outclk domain.
502                       // The state machine operates in inclk domain.
503                       // The state generates mux selection signal.
504                       // The signal latched in outclk domain then activates the mux.
505                       always_ff @(posedge clk_out_i or negedge rst_out_ni) begin
506        2/2              if (!rst_out_ni) addr_phase_outclk <= 1'b 0;
           Tests:       T1 T2 T3  | T1 T2 T3 
507        1/1              else             addr_phase_outclk <= addr_phase;
           Tests:       T6 T9 T10 
508                       end
509                     
510                       // Payload (4 bytes) swap
511                       logic [4:0] payloadcnt, payloadcnt_outclk;
512                       logic       payload_replace, payload_replace_outclk;
513                       logic       payload_replace_set, payload_replace_clr;
514                     
515                       // payload counter
516                       //
517                       // Reset to 'd31. decrease by 1 in every inclk. Stop at 0 then
518                       // payload_replace is cleared.
519                       always_ff @(posedge clk_i or negedge rst_ni) begin
520        1/1              if (!rst_ni) begin
           Tests:       T1 T2 T3 
521        1/1                payloadcnt <= 5'h 1F;
           Tests:       T1 T2 T3 
522        1/1              end else if ((payloadcnt != '0) && payload_replace) begin
           Tests:       T6 T9 T10 
523        1/1                payloadcnt <= payloadcnt - 1'b 1;
           Tests:       T10 T20 T56 
524                         end
                        MISSING_ELSE
525                       end
526                     
527                       always_ff @(posedge clk_out_i or negedge rst_out_ni) begin
528        2/2              if (!rst_out_ni) payloadcnt_outclk <= 5'h 1F;
           Tests:       T1 T2 T3  | T1 T2 T3 
529        1/1              else             payloadcnt_outclk <= payloadcnt;
           Tests:       T6 T9 T10 
530                       end
531                     
532                       always_ff @(posedge clk_i or negedge rst_ni) begin
533        2/2              if (!rst_ni)                  payload_replace <= 1'b 0;
           Tests:       T1 T2 T3  | T1 T2 T3 
534        2/2              else if (payload_replace_set) payload_replace <= 1'b 1;
           Tests:       T6 T9 T10  | T9 T10 T19 
535        2/2              else if (payload_replace_clr) payload_replace <= 1'b 0;
           Tests:       T6 T9 T10  | T10 T20 T56 
                        MISSING_ELSE
536                       end
537                     
538                       always_ff @(posedge clk_out_i or negedge rst_out_ni) begin
539        2/2              if (!rst_out_ni) payload_replace_outclk <= 1'b 0;
           Tests:       T1 T2 T3  | T1 T2 T3 
540        1/1              else             payload_replace_outclk <= payload_replace;
           Tests:       T6 T9 T10 
541                       end
542                     
543        1/1            assign payload_replace_clr = (payloadcnt == '0);
           Tests:       T1 T2 T3 
544                       // FSM drives payload_replace_set : assert when st moves to StDriving
545                       logic payload_swap;
546        1/1            assign payload_swap = cfg_payload_mask_i[payloadcnt_outclk]
           Tests:       T1 T2 T3 
547                                           ? cfg_payload_data_i[payloadcnt_outclk]
548                                           : host_s_i[0] ;
549                     
550                       // SPI swap (merging Addr & Payload)
551                       logic swap_en, swap_data, addr_swap_en, payload_swap_en;
552                     
553                       // Latch cmd_info config signals in output clock.
554                       // cmd_info structure is latched in input clock.  But addr_swap_en and
555                       // payload_swap_en affects the output path (from host to the downstream flash
556                       // device).  as the output delay is bigger than the half of SCK, these paths
557                       // violates timing regardless of the path delay.  By latching the configs
558                       // into output clock (inverted SCK), it alleviates the timing budget.
559                       logic cmd_info_addr_swap_en_outclk, cmd_info_payload_swap_en_outclk;
560                       always_ff @(posedge clk_out_i or negedge rst_out_ni) begin
561        1/1              if (!rst_out_ni) begin
           Tests:       T1 T2 T3 
562        1/1                cmd_info_addr_swap_en_outclk    <= 1'b 0;
           Tests:       T1 T2 T3 
563        1/1                cmd_info_payload_swap_en_outclk <= 1'b 0;
           Tests:       T1 T2 T3 
564                         end else begin
565        1/1                cmd_info_addr_swap_en_outclk    <= cmd_info.addr_swap_en;
           Tests:       T6 T9 T10 
566        1/1                cmd_info_payload_swap_en_outclk <= cmd_info.payload_swap_en;
           Tests:       T6 T9 T10 
567                         end
568                       end
569                     
570        1/1            assign addr_swap_en    = addr_phase_outclk
           Tests:       T1 T2 T3 
571                                              & cmd_info_addr_swap_en_outclk;
572        1/1            assign payload_swap_en = payload_replace_outclk
           Tests:       T1 T2 T3 
573                                              & cmd_info_payload_swap_en_outclk;
574                     
575        1/1            assign swap_en   = addr_swap_en | payload_swap_en ;
           Tests:       T1 T2 T3 
576        1/1            assign swap_data = (addr_swap_en) ? addr_swap : payload_swap ;
           Tests:       T1 T2 T3 
577                     
578                       // Dummy Counter
579                       logic dummy_set;
580                       logic dummycnt_zero;
581                       always_ff @(posedge clk_i or negedge rst_ni) begin
582        2/2              if (!rst_ni) dummycnt <= '0;
           Tests:       T1 T2 T3  | T1 T2 T3 
583        1/1              else if (dummy_set) begin
           Tests:       T6 T9 T10 
584        1/1                dummycnt <= dummycnt_d;
           Tests:       T6 T16 T17 
585        1/1              end else if (st == StHighZ) begin
           Tests:       T6 T9 T10 
586        1/1                dummycnt <= dummycnt - 1'b 1;
           Tests:       T6 T16 T17 
587                         end
                        MISSING_ELSE
588                       end
589        1/1            assign dummycnt_zero = (dummycnt == '0);
           Tests:       T1 T2 T3 
590                     
591                       // MByte counter
592                       logic mbyte_set;
593                       logic mbytecnt_zero;
594                       logic [1:0] mbyte_cnt;
595                       always_ff @(posedge clk_i or negedge rst_ni) begin
596        1/1              if (!rst_ni) begin
           Tests:       T1 T2 T3 
597        1/1                mbyte_cnt <= '0;
           Tests:       T1 T2 T3 
598        1/1              end else if (mbyte_set) begin
           Tests:       T6 T9 T10 
599        0/1     ==>        mbyte_cnt <= 2'h 3;
600        1/1              end else if (st == StMByte) begin
           Tests:       T6 T9 T10 
601        0/1     ==>        mbyte_cnt <= mbyte_cnt - 1'b 1;
602                         end
                        MISSING_ELSE
603                       end
604        1/1            assign mbytecnt_zero = (mbyte_cnt == '0);
           Tests:       T1 T2 T3 
605                     
606                       // = BEGIN: Passthrough Mux (!important) ====================================
607                     
608                       // As swap_en is in outclk domain, addr_swap can be directly used.
609        1/1            assign passthrough_o.s = (swap_en) ? {host_s_i[3:1], swap_data} : host_s_i ;
           Tests:       T1 T2 T3 
610                     
611                       logic [3:0] passthrough_s_en;
612                       always_ff @(posedge clk_out_i or negedge rst_out_ni) begin
613        2/2              if (!rst_out_ni) passthrough_s_en <= 4'h 1; // S[0] active by default
           Tests:       T1 T2 T3  | T1 T2 T3 
614        1/1              else             passthrough_s_en <= device_s_en_inclk;
           Tests:       T6 T9 T10 
615                       end
616        1/1            assign passthrough_o.s_en = passthrough_s_en;
           Tests:       T1 T2 T3 
617                     
618                       // 2-stage pipeline for high-throughput read commands
619                       logic [3:0] half_cycle_sampled_sd;
620                       logic [3:0] read_pipeline_stg1_d, read_pipeline_stg1_q;
621                       logic [3:0] read_pipeline_stg2_d, read_pipeline_stg2_q;
622                       logic [3:0] host_s_en_muxed;
623                       logic [3:0] read_pipeline_oe_stg1_d, read_pipeline_oe_stg1_q;
624                       logic [3:0] read_pipeline_oe_stg2_d, read_pipeline_oe_stg2_q;
625                     
626                       // Sample on the ordinary capture edge, in case half-cycle sampling is
627                       // selected. This flop samples data that is to be prepared for a later
628                       // launch edge, in a sort of store-and-forward setup.
629                       prim_flop #(
630                         .Width         ($bits(passthrough_i.s)),
631                         .ResetValue    ('0)
632                       ) u_read_half_cycle (
633                         .clk_i     (clk_i),
634                         .rst_ni,
635                         .d_i       (passthrough_i.s),
636                         .q_o       (half_cycle_sampled_sd)
637                       );
638                     
639                       // This flop begins the 2-stage pipeline on clk_out_i, the launch clock for
640                       // data output. The input data is either the combinatorial input from the
641                       // pad connected to the downstream SPI flash, or it is the output of the
642                       // u_read_half_cycle flop above, which sampled the data on the capture edge
643                       // that occurred a half cycle earlier.
644                       prim_flop #(
645                         .Width         ($bits(read_pipeline_stg1_d)),
646                         .ResetValue    ('0)
647                       ) u_read_pipe_stg1 (
648                         .clk_i     (clk_out_i),
649                         .rst_ni    (rst_out_ni),
650                         .d_i       (read_pipeline_stg1_d),
651                         .q_o       (read_pipeline_stg1_q)
652                       );
653                     
654                       prim_flop #(
655                         .Width         ($bits(read_pipeline_stg2_d)),
656                         .ResetValue    ('0)
657                       ) u_read_pipe_stg2 (
658                         .clk_i     (clk_out_i),
659                         .rst_ni    (rst_out_ni),
660                         .d_i       (read_pipeline_stg2_d),
661                         .q_o       (read_pipeline_stg2_q)
662                       );
663                     
664                       prim_flop #(
665                         .Width         ($bits(read_pipeline_oe_stg1_d)),
666                         .ResetValue    ('0)
667                       ) u_read_pipe_oe_stg1 (
668                         .clk_i     (clk_out_i),
669                         .rst_ni    (rst_out_ni),
670                         .d_i       (read_pipeline_oe_stg1_d),
671                         .q_o       (read_pipeline_oe_stg1_q)
672                       );
673                     
674                       prim_flop #(
675                         .Width         ($bits(read_pipeline_oe_stg2_d)),
676                         .ResetValue    ('0)
677                       ) u_read_pipe_oe_stg2 (
678                         .clk_i     (clk_out_i),
679                         .rst_ni    (rst_out_ni),
680                         .d_i       (read_pipeline_oe_stg2_d),
681                         .q_o       (read_pipeline_oe_stg2_q)
682                       );
683                     
684                       always_comb begin
685        1/1              host_s_o = passthrough_i.s;
           Tests:       T1 T2 T3 
686        1/1              read_pipeline_stg2_d = read_pipeline_stg1_q;
           Tests:       T1 T2 T3 
687        1/1              read_pipeline_stg1_d = half_cycle_sampled_sd;
           Tests:       T1 T2 T3 
688                     
689        1/1              host_s_en_muxed = host_s_en_inclk;
           Tests:       T1 T2 T3 
690        1/1              read_pipeline_oe_stg2_d = read_pipeline_oe_stg1_q;
           Tests:       T1 T2 T3 
691        1/1              read_pipeline_oe_stg1_d = host_s_en_inclk;
           Tests:       T1 T2 T3 
692                     
693        1/1              unique case (cmd_info.read_pipeline_mode)
           Tests:       T1 T2 T3 
694                           RdPipeTwoStageFullCycle: begin
695        1/1                  host_s_o = read_pipeline_stg2_q;
           Tests:       T20 T39 T55 
696        1/1                  read_pipeline_stg1_d = passthrough_i.s;
           Tests:       T20 T39 T55 
697        1/1                  host_s_en_muxed = read_pipeline_oe_stg2_q;
           Tests:       T20 T39 T55 
698                           end
699                           RdPipeTwoStageHalfCycle: begin
700        1/1                  host_s_o = read_pipeline_stg2_q;
           Tests:       T16 T17 T39 
701        1/1                  read_pipeline_stg1_d = half_cycle_sampled_sd;
           Tests:       T16 T17 T39 
702        1/1                  host_s_en_muxed = read_pipeline_oe_stg2_q;
           Tests:       T16 T17 T39 
703                           end
704                           default: begin
705                             host_s_o = passthrough_i.s;
706                             read_pipeline_stg1_d = half_cycle_sampled_sd;
707                             host_s_en_muxed = host_s_en_inclk;
708                           end
709                         endcase
710                       end
711                     
712                       always_ff @(posedge clk_out_i or negedge rst_out_ni) begin
713        2/2              if (!rst_out_ni) host_s_en_o <= '0; // input mode
           Tests:       T1 T2 T3  | T1 T2 T3 
714        1/1              else             host_s_en_o <= host_s_en_muxed;
           Tests:       T6 T9 T10 
715                       end
716                     
717                       logic pt_gated_sck;
718                       prim_clock_gating #(
719                         .NoFpgaGate    (1'b 0),
720                         .FpgaBufGlobal (1'b 1) // Going outside of chip
721                       ) u_pt_sck_cg (
722                         .clk_i     (host_sck_i  ),
723                         .en_i      (sck_gate_en ),
724                         .test_en_i (1'b 0       ), // No FF connected to this gated SCK
725                         .clk_o     (pt_gated_sck)
726                       );
727                     
728        1/1            assign passthrough_o.sck    = pt_gated_sck;
           Tests:       T1 T2 T3 
729                       assign passthrough_o.sck_en = 1'b 1;
730                     
731                       // CSb propagation:  csb_deassert signal should be an output of FF or latch to
732                       // make CSb glitch-free.
733                       assign passthrough_o.csb_en = 1'b 1;
734        1/1            assign passthrough_o.csb    = host_csb_i | csb_deassert_outclk ;
           Tests:       T1 T2 T3 
735                     
736                       // passthrough_en
737        1/1            assign passthrough_o.passthrough_en = is_active && !passthrough_block_i;
           Tests:       T1 T2 T3 
738                     
739                       // - END:   Passthrough Mux (!important) ------------------------------------
740                     
741                       ///////////////////
742                       // State Machine //
743                       ///////////////////
744                       always_ff @(posedge clk_i or negedge rst_ni) begin
745        1/1              if (!rst_ni) begin
           Tests:       T1 T2 T3 
746        1/1                st <= StIdle;
           Tests:       T1 T2 T3 
747                         end else begin
748        1/1                st <= st_d;
           Tests:       T6 T9 T10 
749                         end
750                       end
751                     
752                       always_comb begin
753        1/1              st_d = st;
           Tests:       T1 T2 T3 
754                     
755                         // filter
756        1/1              filter = 1'b 0;
           Tests:       T1 T2 T3 
757                     
758                         // Command Cfg Latch
759        1/1              cmd_info_latch = 1'b 0;
           Tests:       T1 T2 T3 
760                     
761                         // addr_set
762        1/1              addr_set_d = 1'b 0;
           Tests:       T1 T2 T3 
763                     
764                         // Payload swap control
765        1/1              payload_replace_set = 1'b 0;
           Tests:       T1 T2 T3 
766                     
767                         // mbyte counter udpate
768        1/1              mbyte_set = 1'b 0;
           Tests:       T1 T2 T3 
769                     
770                         // Dummy
771        1/1              dummy_set = 1'b 0;
           Tests:       T1 T2 T3 
772        1/1              dummycnt_d = '0;
           Tests:       T1 T2 T3 
773                     
774                         // Output enable
775        1/1              host_s_en_inclk   = 4'h 0;
           Tests:       T1 T2 T3 
776        1/1              device_s_en_inclk = 4'h 1; // S[0] MOSI active
           Tests:       T1 T2 T3 
777                     
778        1/1              unique case (st)
           Tests:       T1 T2 T3 
779                           StIdle: begin
780        1/1                  if (!is_active) begin
           Tests:       T1 T2 T3 
781        1/1                    st_d = StIdle;
           Tests:       T1 T2 T3 
782        1/1                  end else if (cmd_8th && cmd_filter[host_s_i[0]]) begin
           Tests:       T6 T9 T10 
783        1/1                    st_d = StFilter;
           Tests:       T6 T9 T10 
784        1/1                    filter = 1'b 1;
           Tests:       T6 T9 T10 
785                     
786                               // Send notification event to SW
787        1/1                  end else if (cmd_8th && cmd_info_d.valid) begin
           Tests:       T6 T9 T10 
788        1/1                    cmd_info_latch = 1'b 1;
           Tests:       T6 T9 T10 
789                     
790                               // Divert to multiple states.
791                               //
792                               // The following states are mainly for controlling the output enable
793                               // signals. StAddress state, however, controls the SPI lines for
794                               // address swap in case of Read Commands.
795                               //
796                               // Order: addr_mode , dummy_en, |payload_en
797                               // Note that no direct transition to MByte state.
798        1/1                    if (cmd_info_d.addr_mode != AddrDisabled) begin
           Tests:       T6 T9 T10 
799        1/1                      st_d = StAddress;
           Tests:       T6 T10 T16 
800                     
801        1/1                      addr_set_d = 1'b 1;
           Tests:       T6 T10 T16 
802        1/1                    end else if (cmd_info_d.dummy_en) begin
           Tests:       T6 T9 T17 
803        1/1                      st_d = StHighZ;
           Tests:       T57 T58 T59 
804                     
805        1/1                      dummy_set = 1'b 1;
           Tests:       T57 T58 T59 
806        1/1                      dummycnt_d = cmd_info_d.dummy_size;
           Tests:       T57 T58 T59 
807        1/1                    end else if (cmd_info_d.payload_en != 0) begin
           Tests:       T6 T9 T17 
808                                 // Any input/output payload
809        1/1                      if (cmd_info_d.payload_dir == PayloadOut) begin
           Tests:       T6 T9 T17 
810        1/1                        st_d = StWait;
           Tests:       T6 T17 T18 
811                                 end else begin
812        1/1                        st_d = StDriving;
           Tests:       T9 T19 T60 
813                     
814        1/1                        payload_replace_set = 1'b 1;
           Tests:       T9 T19 T60 
815                                 end
816                               end
                        MISSING_ELSE
817                             end // cmd_8th && cmd_info_d.valid
818        1/1                  else if (cmd_8th) begin
           Tests:       T6 T9 T10 
819                               // cmd_info_d.valid is 0. Skip current transaction
820        1/1                    st_d = StFilter;
           Tests:       T9 T16 T17 
821        1/1                    filter = 1'b 1;
           Tests:       T9 T16 T17 
822                             end
                        MISSING_ELSE
823                           end
824                     
825                           StMByte: begin
826        0/1     ==>          if (mbytecnt_zero) begin
827        0/1     ==>            st_d = StHighZ;
828                     
829        0/1     ==>            dummy_set = 1'b 1;
830        0/1     ==>            dummycnt_d = cmd_info_d.dummy_size;
831                             end else begin
832        0/1     ==>            st_d = StMByte;
833                             end
834                           end
835                     
836                           StFilter: begin
837                             // Command is filtered. Wait until reset(CSb) comes.
838        1/1                  st_d = StFilter;
           Tests:       T6 T9 T10 
839        1/1                  host_s_en_inclk   = 4'h 0; // explicit
           Tests:       T6 T9 T10 
840        1/1                  device_s_en_inclk = 4'h 0;
           Tests:       T6 T9 T10 
841                           end
842                     
843                           StWait: begin
844                             // Device Returns Data to host
845        1/1                  st_d = StWait;
           Tests:       T6 T16 T17 
846                     
847                             // output enable for host
848        1/1                  host_s_en_inclk = cmd_info.payload_en;
           Tests:       T6 T16 T17 
849        1/1                  device_s_en_inclk = 4'h 0;
           Tests:       T6 T16 T17 
850                           end
851                     
852                           StDriving: begin
853                             // Host sends Data to device
854        1/1                  st_d = StDriving;
           Tests:       T9 T10 T19 
855                     
856                             // Output enable for device
857        1/1                  host_s_en_inclk   = 4'h 0; // explicit
           Tests:       T9 T10 T19 
858        1/1                  device_s_en_inclk = cmd_info.payload_en;
           Tests:       T9 T10 T19 
859                           end
860                     
861                           StHighZ: begin
862        1/1                  host_s_en_inclk   = 4'h 0; // explicit
           Tests:       T6 T16 T17 
863        1/1                  device_s_en_inclk = 4'h 0; // float
           Tests:       T6 T16 T17 
864        1/1                  if (dummycnt_zero && (cmd_info.payload_dir == PayloadOut)) begin
           Tests:       T6 T16 T17 
865                               // Assume payload_en not 0
866        1/1                    st_d = StWait;
           Tests:       T6 T16 T17 
867        1/1                  end else if (dummycnt_zero && (cmd_info.payload_dir == PayloadIn)) begin
           Tests:       T6 T16 T17 
868        0/1     ==>            st_d = StDriving;
869                     
870        0/1     ==>            payload_replace_set = 1'b 1;
871                             end
                        MISSING_ELSE
872                           end
873                     
874                           StAddress: begin
875                             // based on state, addr_phase is set. So just check if counter reaches 0
876        1/1                  if (addrcnt_outclk == '0) begin
           Tests:       T6 T10 T16 
877        1/1                    if (cmd_info.mbyte_en) begin
           Tests:       T6 T10 T16 
878        0/1     ==>              st_d = StMByte;
879                     
880        0/1     ==>              mbyte_set = 1'b 1;
881        1/1                    end else if (cmd_info.dummy_en) begin
           Tests:       T6 T10 T16 
882        1/1                      st_d = StHighZ;
           Tests:       T6 T16 T17 
883                     
884        1/1                      dummy_set = 1'b 1;
           Tests:       T6 T16 T17 
885        1/1                      dummycnt_d = cmd_info.dummy_size;
           Tests:       T6 T16 T17 
886        1/1                    end else if (cmd_info.payload_en != 0
           Tests:       T10 T17 T20 
887                                            && (cmd_info.payload_dir == PayloadOut)) begin
888        1/1                      st_d = StWait;
           Tests:       T39 T55 T61 
889        1/1                    end else if (cmd_info.payload_en != 0
           Tests:       T10 T17 T20 
890                                            && (cmd_info.payload_dir == PayloadIn)) begin
891        1/1                      st_d = StDriving;
           Tests:       T10 T20 T56 
892                     
893        1/1                      payload_replace_set = 1'b 1;
           Tests:       T10 T20 T56 
894                               end else begin
895                                 // Addr completed command. goto wait state
896        1/1                      st_d = StWait;
           Tests:       T17 T62 T63 
897                               end
898                             end
                        MISSING_ELSE
899                           end
900                     
901                           default: begin
902                             st_d = StIdle;

---

Cond Coverage for Instance : tb.dut.u_passthrough

	Total	Covered	Percent
Conditions	94	86	91.49
Logical	94	86	91.49
Non-Logical	0	0
Event	0	0

 LINE       271
 EXPRESSION (spi_mode_i == PassThrough)
            -------------1-------------

-1-	Status	Tests
0	Covered	T1,T2,T3
1	Covered	T6,T9,T10

 LINE       355
 SUB-EXPRESSION (filter | csb_deassert)
                 ---1--   ------2-----

-1-	-2-	Status	Tests
0	0	Covered	T1,T2,T3
0	1	Covered	T6,T9,T10
1	0	Covered	T6,T9,T10

 LINE       362
 EXPRESSION (bitcnt != '1)
            -------1------

-1-	Status	Tests
0	Covered	T6,T9,T10
1	Covered	T6,T9,T10

 LINE       372
 EXPRESSION (bitcnt == 6'(6))
            --------1--------

-1-	Status	Tests
0	Covered	T1,T2,T3
1	Covered	T6,T9,T10

 LINE       373
 EXPRESSION (bitcnt == 6'(7))
            --------1--------

-1-	Status	Tests
0	Covered	T1,T2,T3
1	Covered	T6,T9,T10

 LINE       404
 EXPRESSION (cmd_info_i[i].opcode == {opcode_d[6:0], 1'b1})
            -----------------------1-----------------------

-1-	Status	Tests
0	Covered	T6,T9,T10
1	Covered	T6,T9,T10

 LINE       406
 EXPRESSION (cmd_info_i[i].opcode == {opcode_d[6:0], 1'b0})
            -----------------------1-----------------------

-1-	Status	Tests
0	Covered	T6,T9,T10
1	Covered	T6,T9,T17

 LINE       467
 EXPRESSION (addr_mode == Addr4B)
            ----------1----------

-1-	Status	Tests
0	Covered	T1,T2,T3
1	Covered	T10,T16,T17

 LINE       475
 EXPRESSION (st == StAddress)
            --------1--------

-1-	Status	Tests
0	Covered	T1,T2,T3
1	Covered	T6,T10,T16

 LINE       490
 EXPRESSION (addrcnt_outclk != '0)
            -----------1----------

-1-	Status	Tests
0	Covered	T6,T9,T10
1	Covered	T6,T10,T16

 LINE       497
 EXPRESSION (cfg_addr_mask_i[addrcnt_outclk] ? cfg_addr_value_i[addrcnt_outclk] : host_s_i[0])
             ---------------1---------------

-1-	Status	Tests
0	Covered	T1,T2,T3
1	Covered	T6,T9,T10

 LINE       522
 EXPRESSION ((payloadcnt != '0) && payload_replace)
             ---------1--------    -------2-------

-1-	-2-	Status	Tests
0	1	Covered	T10,T20,T56
1	0	Covered	T6,T9,T10
1	1	Covered	T10,T20,T56

 LINE       522
 SUB-EXPRESSION (payloadcnt != '0)
                ---------1--------

-1-	Status	Tests
0	Covered	T10,T20,T56
1	Covered	T6,T9,T10

 LINE       543
 EXPRESSION (payloadcnt == '0)
            ---------1--------

-1-	Status	Tests
0	Covered	T1,T2,T3
1	Covered	T10,T20,T56

 LINE       546
 EXPRESSION (cfg_payload_mask_i[payloadcnt_outclk] ? cfg_payload_data_i[payloadcnt_outclk] : host_s_i[0])
             ------------------1------------------

-1-	Status	Tests
0	Covered	T1,T2,T3
1	Covered	T9,T10,T12

 LINE       570
 EXPRESSION (addr_phase_outclk & cmd_info_addr_swap_en_outclk)
             --------1--------   --------------2-------------

-1-	-2-	Status	Tests
0	1	Covered	T10,T18,T56
1	0	Covered	T6,T16,T17
1	1	Covered	T10,T18,T56

 LINE       572
 EXPRESSION (payload_replace_outclk & cmd_info_payload_swap_en_outclk)
             -----------1----------   ---------------2---------------

-1-	-2-	Status	Tests
0	1	Covered	T10,T56,T62
1	0	Covered	T9,T19,T20
1	1	Covered	T10,T56,T62

 LINE       575
 EXPRESSION (addr_swap_en | payload_swap_en)
             ------1-----   -------2-------

-1-	-2-	Status	Tests
0	0	Covered	T1,T2,T3
0	1	Covered	T10,T56,T62
1	0	Covered	T10,T18,T56

 LINE       576
 EXPRESSION (addr_swap_en ? addr_swap : payload_swap)
             ------1-----

-1-	Status	Tests
0	Covered	T1,T2,T3
1	Covered	T10,T18,T56

 LINE       585
 EXPRESSION (st == StHighZ)
            -------1-------

-1-	Status	Tests
0	Covered	T6,T9,T10
1	Covered	T6,T16,T17

 LINE       589
 EXPRESSION (dummycnt == '0)
            --------1-------

-1-	Status	Tests
0	Covered	T1,T2,T3
1	Covered	T1,T2,T3

 LINE       600
 EXPRESSION (st == StMByte)
            -------1-------

-1-	Status	Tests
0	Covered	T6,T9,T10
1	Not Covered

 LINE       604
 EXPRESSION (mbyte_cnt == '0)
            --------1--------

-1-	Status	Tests
0	Covered	T1,T2,T3
1	Covered	T1,T2,T3

 LINE       609
 EXPRESSION (swap_en ? ({host_s_i[3:1], swap_data}) : host_s_i)
             ---1---

-1-	Status	Tests
0	Covered	T1,T2,T3
1	Covered	T10,T18,T56

 LINE       734
 EXPRESSION (host_csb_i | csb_deassert_outclk)
             -----1----   ---------2---------

-1-	-2-	Status	Tests
0	0	Covered	T1,T6,T9
0	1	Covered	T6,T9,T10
1	0	Covered	T1,T2,T3

 LINE       737
 EXPRESSION (is_active && ((!passthrough_block_i)))
             ----1----    ------------2-----------

-1-	-2-	Status	Tests
0	1	Covered	T1,T2,T3
1	0	Covered	T20,T60,T62
1	1	Covered	T6,T9,T10

 LINE       782
 EXPRESSION (cmd_8th && cmd_filter[host_s_i[0]])
             ---1---    -----------2-----------

-1-	-2-	Status	Tests
0	1	Not Covered
1	0	Covered	T6,T9,T10
1	1	Covered	T6,T9,T10

 LINE       787
 EXPRESSION (cmd_8th && cmd_info_d.valid)
             ---1---    --------2-------

-1-	-2-	Status	Tests	Exclude Annotation
0	1	Excluded		VC_COV_UNR
1	0	Covered	T9,T16,T17
1	1	Covered	T6,T9,T10

 LINE       798
 EXPRESSION (cmd_info_d.addr_mode != AddrDisabled)
            -------------------1------------------

-1-	Status	Tests
0	Covered	T6,T9,T17
1	Covered	T6,T10,T16

 LINE       807
 EXPRESSION (cmd_info_d.payload_en != 4'b0)
            ---------------1---------------

-1-	Status	Tests
0	Covered	T6,T64,T65
1	Covered	T6,T9,T17

 LINE       809
 EXPRESSION (cmd_info_d.payload_dir == PayloadOut)
            -------------------1------------------

-1-	Status	Tests
0	Covered	T9,T19,T60
1	Covered	T6,T17,T18

 LINE       864
 EXPRESSION (dummycnt_zero && (cmd_info.payload_dir == PayloadOut))
             ------1------    ------------------2-----------------

-1-	-2-	Status	Tests
0	1	Covered	T6,T16,T17
1	0	Not Covered
1	1	Covered	T6,T16,T17

 LINE       864
 SUB-EXPRESSION (cmd_info.payload_dir == PayloadOut)
                ------------------1-----------------

-1-	Status	Tests
0	Not Covered
1	Covered	T6,T16,T17

 LINE       867
 EXPRESSION (dummycnt_zero && (cmd_info.payload_dir == PayloadIn))
             ------1------    -----------------2-----------------

-1-	-2-	Status	Tests	Exclude Annotation
0	1	Not Covered
1	0	Excluded		VC_COV_UNR
1	1	Not Covered

 LINE       867
 SUB-EXPRESSION (cmd_info.payload_dir == PayloadIn)
                -----------------1-----------------

-1-	Status	Tests
0	Covered	T6,T16,T17
1	Not Covered

 LINE       876
 EXPRESSION (addrcnt_outclk == '0)
            -----------1----------

-1-	Status	Tests
0	Covered	T6,T10,T16
1	Covered	T6,T10,T16

 LINE       886
 EXPRESSION ((cmd_info.payload_en != 4'b0) && (cmd_info.payload_dir == PayloadOut))
             --------------1--------------    ------------------2-----------------

-1-	-2-	Status	Tests
0	1	Covered	T17,T62,T63
1	0	Covered	T10,T20,T56
1	1	Covered	T39,T55,T61

 LINE       886
 SUB-EXPRESSION (cmd_info.payload_en != 4'b0)
                --------------1--------------

-1-	Status	Tests
0	Covered	T17,T62,T63
1	Covered	T10,T20,T39

 LINE       886
 SUB-EXPRESSION (cmd_info.payload_dir == PayloadOut)
                ------------------1-----------------

-1-	Status	Tests
0	Covered	T10,T20,T56
1	Covered	T17,T39,T55

 LINE       889
 EXPRESSION ((cmd_info.payload_en != 4'b0) && (cmd_info.payload_dir == PayloadIn))
             --------------1--------------    -----------------2-----------------

-1-	-2-	Status	Tests	Exclude Annotation
0	1	Not Covered
1	0	Excluded		VC_COV_UNR
1	1	Covered	T10,T20,T56

 LINE       889
 SUB-EXPRESSION (cmd_info.payload_en != 4'b0)
                --------------1--------------

-1-	Status	Tests
0	Covered	T17,T62,T63
1	Covered	T10,T20,T56

 LINE       889
 SUB-EXPRESSION (cmd_info.payload_dir == PayloadIn)
                -----------------1-----------------

-1-	Status	Tests
0	Covered	T17,T62,T63
1	Covered	T10,T20,T56

---

FSM Coverage for Instance : tb.dut.u_passthrough

Summary for FSM :: st

	Total	Covered	Percent
States	7	6	85.71	(Not included in score)
Transitions	12	9	75.00
Sequences	0	0

State, Transition and Sequence Details for FSM :: st

---

states	Line No.	Covered	Tests
StAddress	799	Covered	T6,T10,T16
StDriving	812	Covered	T9,T10,T19
StFilter	783	Covered	T6,T9,T10
StHighZ	803	Covered	T6,T16,T17
StIdle	781	Covered	T1,T2,T3
StMByte	832	Not Covered
StWait	810	Covered	T6,T16,T17

transitions	Line No.	Covered	Tests
StAddress->StDriving	891	Covered	T10,T20,T56
StAddress->StHighZ	882	Covered	T6,T16,T17
StAddress->StMByte	878	Not Covered
StAddress->StWait	888	Covered	T17,T39,T55
StHighZ->StDriving	868	Not Covered
StHighZ->StWait	866	Covered	T6,T16,T17
StIdle->StAddress	799	Covered	T6,T10,T16
StIdle->StDriving	812	Covered	T9,T19,T60
StIdle->StFilter	783	Covered	T6,T9,T10
StIdle->StHighZ	803	Covered	T57,T58,T59
StIdle->StWait	810	Covered	T6,T17,T18
StMByte->StHighZ	827	Not Covered

---

Branch Coverage for Instance : tb.dut.u_passthrough

	Line No.	Total	Covered	Percent
Branches		96	89	92.71
TERNARY	497	2	2	100.00
TERNARY	546	2	2	100.00
TERNARY	576	2	2	100.00
TERNARY	609	2	2	100.00
IF	336	3	3	100.00
IF	345	3	3	100.00
IF	349	2	2	100.00
IF	360	3	3	100.00
IF	376	3	3	100.00
IF	401	2	2	100.00
IF	414	3	3	100.00
IF	425	3	3	100.00
IF	451	2	2	100.00
IF	467	2	2	100.00
IF	478	2	2	100.00
IF	486	4	4	100.00
IF	506	2	2	100.00
IF	520	3	3	100.00
IF	528	2	2	100.00
IF	533	4	4	100.00
IF	539	2	2	100.00
IF	561	2	2	100.00
IF	582	4	4	100.00
IF	596	4	2	50.00
IF	613	2	2	100.00
CASE	693	3	3	100.00
IF	713	2	2	100.00
IF	745	2	2	100.00
CASE	778	24	19	79.17

497          assign addr_swap = cfg_addr_mask_i[addrcnt_outclk]
                                                               
498                           ? cfg_addr_value_i[addrcnt_outclk]
                              -1-  
                              ==>  
                              ==>  

Branches:

-1-	Status	Tests
1	Covered	T6,T9,T10
0	Covered	T1,T2,T3

546          assign payload_swap = cfg_payload_mask_i[payloadcnt_outclk]
                                                                        
547                              ? cfg_payload_data_i[payloadcnt_outclk]
                                 -1-  
                                 ==>  
                                 ==>  

Branches:

-1-	Status	Tests
1	Covered	T9,T10,T12
0	Covered	T1,T2,T3

576          assign swap_data = (addr_swap_en) ? addr_swap : payload_swap ;
                                               -1-  
                                               ==>  
                                               ==>  

Branches:

-1-	Status	Tests
1	Covered	T10,T18,T56
0	Covered	T1,T2,T3

609          assign passthrough_o.s = (swap_en) ? {host_s_i[3:1], swap_data} : host_s_i ;
                                                -1-  
                                                ==>  
                                                ==>  

Branches:

-1-	Status	Tests
1	Covered	T10,T18,T56
0	Covered	T1,T2,T3

336            if (!rst_ni) begin
               -1-  
337              opcode <= 8'h 00;
                 ==>
338            end else if (bitcnt < MetaBitCntW'(8)) begin
                        -2-  
339              opcode <= opcode_d;
                 ==>
340            end
               MISSING_ELSE
               ==>

Branches:

-1-	-2-	Status	Tests
1	-	Covered	T1,T2,T3
0	1	Covered	T6,T9,T10
0	0	Covered	T6,T9,T10

345            if (!rst_ni)     csb_deassert <= 1'b 0;
               -1-  
               ==>
346            else if (filter) csb_deassert <= 1'b 1;
                    -2-  
               ==>
               MISSING_ELSE
               ==>

Branches:

-1-	-2-	Status	Tests
1	-	Covered	T1,T2,T3
0	1	Covered	T6,T9,T10
0	0	Covered	T6,T9,T10

349            if (!rst_out_ni) csb_deassert_outclk <= 1'b 0;
               -1-  
               ==>
350            else             csb_deassert_outclk <= csb_deassert;
               ==>

Branches:

-1-	Status	Tests
1	Covered	T1,T2,T3
0	Covered	T6,T9,T10

360            if (!rst_ni) begin
               -1-  
361              bitcnt <= '0;
                 ==>
362            end else if (bitcnt != '1) begin
                        -2-  
363              bitcnt <= bitcnt + MetaBitCntW'(1);
                 ==>
364            end
               MISSING_ELSE
               ==>

Branches:

-1-	-2-	Status	Tests
1	-	Covered	T1,T2,T3
0	1	Covered	T6,T9,T10
0	0	Covered	T6,T9,T10

376            if (!rst_ni) begin
               -1-  
377              cmd_filter <= 2'b 00;
                 ==>
378            end else if (cmd_7th) begin
                        -2-  
379              // In this 7th beat, cmd_filter latches 2 bits from cfg_cmd_filter_i
380              // This reduces the last filter datapath from muxing 256 to just mux2
381              //
382              // If below syntax does not work, it can be replaced with
383              // for (int unsigned i = 0 ; i < 128 ; i++) begin
384              //   it (i == opcode[6:0]) cmd_filter <= cfg_cmd_filter_i[2*i+:2];
385              // end
386              cmd_filter <= cfg_cmd_filter_i[{opcode_d[6:0],1'b0}+:2];
                 ==>
387            end
               MISSING_ELSE
               ==>

Branches:

-1-	-2-	Status	Tests
1	-	Covered	T1,T2,T3
0	1	Covered	T6,T9,T10
0	0	Covered	T6,T9,T10

401            if (cmd_7th) begin
               -1-  
402              for(int unsigned i = 0 ; i < NumTotalCmdInfo ; i++) begin
                 ==>
403                if (cmd_info_i[i].valid) begin
404                  if (cmd_info_i[i].opcode == {opcode_d[6:0], 1'b1}) begin
405                    cmd_info_7th_d[1] = cmd_info_i[i];
406                  end else if (cmd_info_i[i].opcode == {opcode_d[6:0], 1'b0}) begin
407                    cmd_info_7th_d[0] = cmd_info_i[i];
408                  end
409                end // cmd_info_i[i].valid
410              end
411            end
               MISSING_ELSE
               ==>

Branches:

-1-	Status	Tests
1	Covered	T6,T9,T10
0	Covered	T1,T2,T3

414            if (!rst_ni) begin
               -1-  
415              cmd_info_7th <= '0;
                 ==>
416            end else if (cmd_7th) begin
                        -2-  
417              // Search two candidate among NumCmdInfo. If only one matched, other
418              // cmd_info is Always Input command.
419              cmd_info_7th <= cmd_info_7th_d;
                 ==>
420              //cmd_info_7th <= {PassThroughCmdInfo[{opcode_d[6:0],1'b1}],
421              //                 PassThroughCmdInfo[{opcode_d[6:0],1'b0}]};
422            end
               MISSING_ELSE
               ==>

Branches:

-1-	-2-	Status	Tests
1	-	Covered	T1,T2,T3
0	1	Covered	T6,T9,T10
0	0	Covered	T6,T9,T10

425            if (!rst_ni) begin
               -1-  
426              cmd_info <= '0;
                 ==>
427            end else if (cmd_info_latch) begin
                        -2-  
428              // Latch only two cmd_info when the 7th bit arrives. Then select among two
429              // at the 8th beat for cmd_info_d to reduce timing.
430              cmd_info <= cmd_info_d;
                 ==>
431            end
               MISSING_ELSE
               ==>

Branches:

-1-	-2-	Status	Tests
1	-	Covered	T1,T2,T3
0	1	Covered	T6,T9,T10
0	0	Covered	T6,T9,T10

451            if (cmd_8th) begin
               -1-  
452              // Latch only two cmd_info when the 7th bit arrives. Then select among two
453              // at the 8th beat for cmd_info_d to reduce timing.
454              cmd_info_d = cmd_info_7th[host_s_i[0]];
                 ==>
455        
456              cmd_info_d.opcode = opcode_d;
457        
458              // dummy_size is set inside State Machine
459            end
               MISSING_ELSE
               ==>

Branches:

-1-	Status	Tests
1	Covered	T6,T9,T10
0	Covered	T1,T2,T3

467            if (addr_mode == Addr4B) begin
               -1-  
468              addr_size_d = AddrCntW'(31);
                 ==>
469            end
               MISSING_ELSE
               ==>

Branches:

-1-	Status	Tests
1	Covered	T10,T16,T17
0	Covered	T1,T2,T3

478            if (!rst_ni) begin
               -1-  
479              addr_set_q <= '0;
                 ==>
480            end else begin
481              addr_set_q <= addr_set_d;
                 ==>

Branches:

-1-	Status	Tests
1	Covered	T1,T2,T3
0	Covered	T6,T9,T10

486            if (!rst_out_ni) begin
               -1-  
487              addrcnt_outclk <= '0;
                 ==>
488            end else if (addr_set_q) begin
                        -2-  
489              addrcnt_outclk <= addr_size_d;
                 ==>
490            end else if (addrcnt_outclk != '0) begin
                        -3-  
491              addrcnt_outclk <= addrcnt_outclk - AddrCntW'(1);
                 ==>
492            end
               MISSING_ELSE
               ==>

Branches:

-1-	-2-	-3-	Status	Tests
1	-	-	Covered	T1,T2,T3
0	1	-	Covered	T6,T10,T16
0	0	1	Covered	T6,T10,T16
0	0	0	Covered	T6,T9,T10

506            if (!rst_out_ni) addr_phase_outclk <= 1'b 0;
               -1-  
               ==>
507            else             addr_phase_outclk <= addr_phase;
               ==>

Branches:

-1-	Status	Tests
1	Covered	T1,T2,T3
0	Covered	T6,T9,T10

520            if (!rst_ni) begin
               -1-  
521              payloadcnt <= 5'h 1F;
                 ==>
522            end else if ((payloadcnt != '0) && payload_replace) begin
                        -2-  
523              payloadcnt <= payloadcnt - 1'b 1;
                 ==>
524            end
               MISSING_ELSE
               ==>

Branches:

-1-	-2-	Status	Tests
1	-	Covered	T1,T2,T3
0	1	Covered	T10,T20,T56
0	0	Covered	T6,T9,T10

528            if (!rst_out_ni) payloadcnt_outclk <= 5'h 1F;
               -1-  
               ==>
529            else             payloadcnt_outclk <= payloadcnt;
               ==>

Branches:

-1-	Status	Tests
1	Covered	T1,T2,T3
0	Covered	T6,T9,T10

533            if (!rst_ni)                  payload_replace <= 1'b 0;
               -1-  
               ==>
534            else if (payload_replace_set) payload_replace <= 1'b 1;
                    -2-  
               ==>
535            else if (payload_replace_clr) payload_replace <= 1'b 0;
                    -3-  
               ==>
               MISSING_ELSE
               ==>

Branches:

-1-	-2-	-3-	Status	Tests
1	-	-	Covered	T1,T2,T3
0	1	-	Covered	T9,T10,T19
0	0	1	Covered	T10,T20,T56
0	0	0	Covered	T6,T9,T10

539            if (!rst_out_ni) payload_replace_outclk <= 1'b 0;
               -1-  
               ==>
540            else             payload_replace_outclk <= payload_replace;
               ==>

Branches:

-1-	Status	Tests
1	Covered	T1,T2,T3
0	Covered	T6,T9,T10

561            if (!rst_out_ni) begin
               -1-  
562              cmd_info_addr_swap_en_outclk    <= 1'b 0;
                 ==>
563              cmd_info_payload_swap_en_outclk <= 1'b 0;
564            end else begin
565              cmd_info_addr_swap_en_outclk    <= cmd_info.addr_swap_en;
                 ==>

Branches:

-1-	Status	Tests
1	Covered	T1,T2,T3
0	Covered	T6,T9,T10

582            if (!rst_ni) dummycnt <= '0;
               -1-  
               ==>
583            else if (dummy_set) begin
                    -2-  
584              dummycnt <= dummycnt_d;
                 ==>
585            end else if (st == StHighZ) begin
                        -3-  
586              dummycnt <= dummycnt - 1'b 1;
                 ==>
587            end
               MISSING_ELSE
               ==>

Branches:

-1-	-2-	-3-	Status	Tests
1	-	-	Covered	T1,T2,T3
0	1	-	Covered	T6,T16,T17
0	0	1	Covered	T6,T16,T17
0	0	0	Covered	T6,T9,T10

596            if (!rst_ni) begin
               -1-  
597              mbyte_cnt <= '0;
                 ==>
598            end else if (mbyte_set) begin
                        -2-  
599              mbyte_cnt <= 2'h 3;
                 ==>
600            end else if (st == StMByte) begin
                        -3-  
601              mbyte_cnt <= mbyte_cnt - 1'b 1;
                 ==>
602            end
               MISSING_ELSE
               ==>

Branches:

-1-	-2-	-3-	Status	Tests
1	-	-	Covered	T1,T2,T3
0	1	-	Not Covered
0	0	1	Not Covered
0	0	0	Covered	T6,T9,T10

613            if (!rst_out_ni) passthrough_s_en <= 4'h 1; // S[0] active by default
               -1-  
               ==>
614            else             passthrough_s_en <= device_s_en_inclk;
               ==>

Branches:

-1-	Status	Tests
1	Covered	T1,T2,T3
0	Covered	T6,T9,T10

693            unique case (cmd_info.read_pipeline_mode)
                      -1-  
694              RdPipeTwoStageFullCycle: begin
695                host_s_o = read_pipeline_stg2_q;
                   ==>
696                read_pipeline_stg1_d = passthrough_i.s;
697                host_s_en_muxed = read_pipeline_oe_stg2_q;
698              end
699              RdPipeTwoStageHalfCycle: begin
700                host_s_o = read_pipeline_stg2_q;
                   ==>
701                read_pipeline_stg1_d = half_cycle_sampled_sd;
702                host_s_en_muxed = read_pipeline_oe_stg2_q;
703              end
704              default: begin
705                host_s_o = passthrough_i.s;
                   ==>

Branches:

-1-	Status	Tests
RdPipeTwoStageFullCycle	Covered	T20,T39,T55
RdPipeTwoStageHalfCycle	Covered	T16,T17,T39
default	Covered	T1,T2,T3

713            if (!rst_out_ni) host_s_en_o <= '0; // input mode
               -1-  
               ==>
714            else             host_s_en_o <= host_s_en_muxed;
               ==>

Branches:

-1-	Status	Tests
1	Covered	T1,T2,T3
0	Covered	T6,T9,T10

745            if (!rst_ni) begin
               -1-  
746              st <= StIdle;
                 ==>
747            end else begin
748              st <= st_d;
                 ==>

Branches:

-1-	Status	Tests
1	Covered	T1,T2,T3
0	Covered	T6,T9,T10

778            unique case (st)
                      -1-  
779              StIdle: begin
780                if (!is_active) begin
                   -2-  
781                  st_d = StIdle;
                     ==>
782                end else if (cmd_8th && cmd_filter[host_s_i[0]]) begin
                            -3-  
783                  st_d = StFilter;
                     ==>
784                  filter = 1'b 1;
785        
786                  // Send notification event to SW
787                end else if (cmd_8th && cmd_info_d.valid) begin
                            -4-  
788                  cmd_info_latch = 1'b 1;
789        
790                  // Divert to multiple states.
791                  //
792                  // The following states are mainly for controlling the output enable
793                  // signals. StAddress state, however, controls the SPI lines for
794                  // address swap in case of Read Commands.
795                  //
796                  // Order: addr_mode , dummy_en, |payload_en
797                  // Note that no direct transition to MByte state.
798                  if (cmd_info_d.addr_mode != AddrDisabled) begin
                     -5-  
799                    st_d = StAddress;
                       ==>
800        
801                    addr_set_d = 1'b 1;
802                  end else if (cmd_info_d.dummy_en) begin
                              -6-  
803                    st_d = StHighZ;
                       ==>
804        
805                    dummy_set = 1'b 1;
806                    dummycnt_d = cmd_info_d.dummy_size;
807                  end else if (cmd_info_d.payload_en != 0) begin
                              -7-  
808                    // Any input/output payload
809                    if (cmd_info_d.payload_dir == PayloadOut) begin
                       -8-  
810                      st_d = StWait;
                         ==>
811                    end else begin
812                      st_d = StDriving;
                         ==>
813        
814                      payload_replace_set = 1'b 1;
815                    end
816                  end
                     MISSING_ELSE
                     ==>
817                end // cmd_8th && cmd_info_d.valid
818                else if (cmd_8th) begin
                        -9-  
819                  // cmd_info_d.valid is 0. Skip current transaction
820                  st_d = StFilter;
                     ==>
821                  filter = 1'b 1;
822                end
                   MISSING_ELSE
                   ==>
823              end
824        
825              StMByte: begin
826                if (mbytecnt_zero) begin
                   -10-  
827                  st_d = StHighZ;
                     ==>
828        
829                  dummy_set = 1'b 1;
830                  dummycnt_d = cmd_info_d.dummy_size;
831                end else begin
832                  st_d = StMByte;
                     ==>
833                end
834              end
835        
836              StFilter: begin
837                // Command is filtered. Wait until reset(CSb) comes.
838                st_d = StFilter;
                   ==>
839                host_s_en_inclk   = 4'h 0; // explicit
840                device_s_en_inclk = 4'h 0;
841              end
842        
843              StWait: begin
844                // Device Returns Data to host
845                st_d = StWait;
                   ==>
846        
847                // output enable for host
848                host_s_en_inclk = cmd_info.payload_en;
849                device_s_en_inclk = 4'h 0;
850              end
851        
852              StDriving: begin
853                // Host sends Data to device
854                st_d = StDriving;
                   ==>
855        
856                // Output enable for device
857                host_s_en_inclk   = 4'h 0; // explicit
858                device_s_en_inclk = cmd_info.payload_en;
859              end
860        
861              StHighZ: begin
862                host_s_en_inclk   = 4'h 0; // explicit
863                device_s_en_inclk = 4'h 0; // float
864                if (dummycnt_zero && (cmd_info.payload_dir == PayloadOut)) begin
                   -11-  
865                  // Assume payload_en not 0
866                  st_d = StWait;
                     ==>
867                end else if (dummycnt_zero && (cmd_info.payload_dir == PayloadIn)) begin
                            -12-  
868                  st_d = StDriving;
                     ==>
869        
870                  payload_replace_set = 1'b 1;
871                end
                   MISSING_ELSE
                   ==>
872              end
873        
874              StAddress: begin
875                // based on state, addr_phase is set. So just check if counter reaches 0
876                if (addrcnt_outclk == '0) begin
                   -13-  
877                  if (cmd_info.mbyte_en) begin
                     -14-  
878                    st_d = StMByte;
                       ==>
879        
880                    mbyte_set = 1'b 1;
881                  end else if (cmd_info.dummy_en) begin
                              -15-  
882                    st_d = StHighZ;
                       ==>
883        
884                    dummy_set = 1'b 1;
885                    dummycnt_d = cmd_info.dummy_size;
886                  end else if (cmd_info.payload_en != 0
                              -16-  
887                               && (cmd_info.payload_dir == PayloadOut)) begin
888                    st_d = StWait;
                       ==>
889                  end else if (cmd_info.payload_en != 0
                              -17-  
890                               && (cmd_info.payload_dir == PayloadIn)) begin
891                    st_d = StDriving;
                       ==>
892        
893                    payload_replace_set = 1'b 1;
894                  end else begin
895                    // Addr completed command. goto wait state
896                    st_d = StWait;
                       ==>
897                  end
898                end
                   MISSING_ELSE
                   ==>
899              end
900        
901              default: begin
902                st_d = StIdle;
                   ==>

Branches:

-1-	-2-	-3-	-4-	-5-	-6-	-7-	-8-	-9-	-10-	-11-	-12-	-13-	-14-	-15-	-16-	-17-	Status	Tests
StIdle	1	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	Covered	T1,T2,T3
StIdle	0	1	-	-	-	-	-	-	-	-	-	-	-	-	-	-	Covered	T6,T9,T10
StIdle	0	0	1	1	-	-	-	-	-	-	-	-	-	-	-	-	Covered	T6,T10,T16
StIdle	0	0	1	0	1	-	-	-	-	-	-	-	-	-	-	-	Covered	T57,T58,T59
StIdle	0	0	1	0	0	1	1	-	-	-	-	-	-	-	-	-	Covered	T6,T17,T18
StIdle	0	0	1	0	0	1	0	-	-	-	-	-	-	-	-	-	Covered	T9,T19,T60
StIdle	0	0	1	0	0	0	-	-	-	-	-	-	-	-	-	-	Covered	T6,T64,T65
StIdle	0	0	0	-	-	-	-	1	-	-	-	-	-	-	-	-	Covered	T9,T16,T17
StIdle	0	0	0	-	-	-	-	0	-	-	-	-	-	-	-	-	Covered	T6,T9,T10
StMByte	-	-	-	-	-	-	-	-	1	-	-	-	-	-	-	-	Not Covered
StMByte	-	-	-	-	-	-	-	-	0	-	-	-	-	-	-	-	Not Covered
StFilter	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	Covered	T6,T9,T10
StWait	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	Covered	T6,T16,T17
StDriving	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	Covered	T9,T10,T19
StHighZ	-	-	-	-	-	-	-	-	-	1	-	-	-	-	-	-	Covered	T6,T16,T17
StHighZ	-	-	-	-	-	-	-	-	-	0	1	-	-	-	-	-	Not Covered
StHighZ	-	-	-	-	-	-	-	-	-	0	0	-	-	-	-	-	Covered	T6,T16,T17
StAddress	-	-	-	-	-	-	-	-	-	-	-	1	1	-	-	-	Not Covered
StAddress	-	-	-	-	-	-	-	-	-	-	-	1	0	1	-	-	Covered	T6,T16,T17
StAddress	-	-	-	-	-	-	-	-	-	-	-	1	0	0	1	-	Covered	T39,T55,T61
StAddress	-	-	-	-	-	-	-	-	-	-	-	1	0	0	0	1	Covered	T10,T20,T56
StAddress	-	-	-	-	-	-	-	-	-	-	-	1	0	0	0	0	Covered	T17,T62,T63
StAddress	-	-	-	-	-	-	-	-	-	-	-	0	-	-	-	-	Covered	T6,T10,T16
default	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	Not Covered

---

Assert Coverage for Instance : tb.dut.u_passthrough

	Total	Attempted	Percent	Succeeded/Matched	Percent
Assertions	2	2	100.00	2	100.00
Cover properties	0	0		0
Cover sequences	0	0		0
Total	2	2	100.00	2	100.00

---

Assertion Details

Name	Attempts	Real Successes	Failures	Incomplete
PassThroughStKnown_A	146705487	120576950	0	0
PayloadSwapConstraint_M	146705487	2097344	0	0

PassThroughStKnown_A

Name	Attempts	Real Successes	Failures	Incomplete
Total	146705487	120576950	0	0
T6	5232	5232	0	0
T9	5758	4240	0	0
T10	4176	4176	0	0
T12	12573	12573	0	0
T13	15465	0	0	0
T14	592	0	0	0
T15	33752	33752	0	0
T16	7272	7272	0	0
T17	103604	103072	0	0
T18	0	21680	0	0
T19	0	3728	0	0
T20	0	23836	0	0
T26	46864	0	0	0

PayloadSwapConstraint_M

Name	Attempts	Real Successes	Failures	Incomplete
Total	146705487	2097344	0	0
T10	4176	2080	0	0
T12	12573	0	0	0
T13	15465	0	0	0
T14	592	0	0	0
T15	33752	0	0	0
T16	7272	0	0	0
T17	103604	0	0	0
T18	22560	0	0	0
T19	3728	0	0	0
T26	46864	0	0	0
T36	0	32	0	0
T48	0	8040	0	0
T56	0	64	0	0
T58	0	2072	0	0
T62	0	2080	0	0
T66	0	2800	0	0
T67	0	568	0	0
T68	0	19392	0	0
T69	0	26856	0	0