Unified Coverage Report :: Module :: sram_ctrl

Module : sram_ctrl

SCORE	LINE	COND	TOGGLE	FSM	BRANCH	ASSERT
91.54	100.00	87.13	100.00		100.00	70.59

Source File(s) :
/workspaces/repo/scratch/os_regression_2024_09_08/sram_ctrl_ret-sim-vcs/default/sim-vcs/../src/lowrisc_ip_sram_ctrl_0.1/rtl/sram_ctrl.sv

Module self-instances :

NAME	SCORE	LINE	COND	TOGGLE	FSM	BRANCH	ASSERT
tb.dut	91.90	100.00	88.89	100.00		100.00	70.59

---

Module Instance : tb.dut

Instance :

SCORE	LINE	COND	TOGGLE	FSM	BRANCH	ASSERT
91.90	100.00	88.89	100.00		100.00	70.59

Instance's subtree :

SCORE	LINE	COND	TOGGLE	FSM	BRANCH	ASSERT
98.04	99.16	94.27	99.72	100.00	95.95	99.12

Parent :

SCORE	LINE	COND	TOGGLE	FSM	BRANCH	ASSERT	NAME
							tb

Subtrees :

NAME	SCORE	LINE	COND	TOGGLE	FSM	BRANCH	ASSERT
sram_ctrl_regs_csr_assert	100.00						100.00
tlul_assert_device_ram	100.00	100.00				100.00	100.00
tlul_assert_device_regs	100.00	100.00				100.00	100.00
u_lfsr	100.00			100.00
u_prim_alert_sender_parity	100.00			100.00
u_prim_count	100.00			100.00
u_prim_lc_sync	100.00	100.00				100.00	100.00
u_prim_ram_1p_scr	99.85	99.26	100.00	100.00		100.00	100.00
u_prim_sync_reqack_data	100.00	100.00	100.00			100.00	100.00
u_reg_regs	98.03	98.43	96.44	100.00		95.28	100.00
u_tlul_adapter_sram	97.56	99.10	93.51	98.44	100.00	94.29	100.00
u_tlul_data_integ_enc	100.00	100.00
u_tlul_lc_gate	96.79	100.00	100.00		100.00	96.43	87.50

Line Coverage for Module : sram_ctrl

	Line No.	Total	Covered	Percent
TOTAL		52	52	100.00
CONT_ASSIGN	131	1	1	100.00
CONT_ASSIGN	139	1	1	100.00
CONT_ASSIGN	142	1	1	100.00
CONT_ASSIGN	146	1	1	100.00
CONT_ASSIGN	150	1	1	100.00
CONT_ASSIGN	154	1	1	100.00
CONT_ASSIGN	157	1	1	100.00
CONT_ASSIGN	189	1	1	100.00
CONT_ASSIGN	191	1	1	100.00
CONT_ASSIGN	199	1	1	100.00
CONT_ASSIGN	207	1	1	100.00
CONT_ASSIGN	217	1	1	100.00
CONT_ASSIGN	226	1	1	100.00
CONT_ASSIGN	231	1	1	100.00
ALWAYS	235	3	3	100.00
CONT_ASSIGN	247	1	1	100.00
CONT_ASSIGN	248	1	1	100.00
CONT_ASSIGN	272	1	1	100.00
CONT_ASSIGN	273	1	1	100.00
CONT_ASSIGN	284	1	1	100.00
CONT_ASSIGN	289	1	1	100.00
CONT_ASSIGN	293	1	1	100.00
CONT_ASSIGN	294	1	1	100.00
CONT_ASSIGN	298	1	1	100.00
CONT_ASSIGN	299	1	1	100.00
CONT_ASSIGN	303	1	1	100.00
CONT_ASSIGN	304	1	1	100.00
ALWAYS	307	11	11	100.00
CONT_ASSIGN	351	1	1	100.00
CONT_ASSIGN	394	1	1	100.00
CONT_ASSIGN	471	1	1	100.00
CONT_ASSIGN	512	1	1	100.00
CONT_ASSIGN	518	1	1	100.00
CONT_ASSIGN	519	1	1	100.00
CONT_ASSIGN	520	1	1	100.00
CONT_ASSIGN	521	1	1	100.00
CONT_ASSIGN	522	1	1	100.00
CONT_ASSIGN	523	1	1	100.00
CONT_ASSIGN	534	1	1	100.00
CONT_ASSIGN	573	1	1	100.00

130                         logic unused_nonce;
131        1/1              assign unused_nonce = ^nonce_q[otp_ctrl_pkg::SramNonceWidth-1:NonceWidth];
           Tests:       T1 T2 T3 
132                       end
133                     
134                       //////////////////
135                       // Alert Sender //
136                       //////////////////
137                     
138                       logic alert_test;
139        1/1            assign alert_test = reg2hw.alert_test.q & reg2hw.alert_test.qe;
           Tests:       T1 T2 T3 
140                     
141                       assign hw2reg.status.bus_integ_error.d  = 1'b1;
142        1/1            assign hw2reg.status.bus_integ_error.de = |bus_integ_error;
           Tests:       T1 T2 T3 
143                     
144                       logic init_error;
145                       assign hw2reg.status.init_error.d  = 1'b1;
146        1/1            assign hw2reg.status.init_error.de = init_error;
           Tests:       T1 T2 T3 
147                     
148                       logic readback_error;
149                       assign hw2reg.status.readback_error.d  = 1'b1;
150        1/1            assign hw2reg.status.readback_error.de = readback_error;
           Tests:       T1 T2 T3 
151                     
152                       logic sram_alert;
153                       assign hw2reg.status.sram_alert.d  = 1'b1;
154        1/1            assign hw2reg.status.sram_alert.de = sram_alert;
           Tests:       T1 T2 T3 
155                     
156                       logic alert_req;
157        1/1            assign alert_req = (|bus_integ_error) | init_error | readback_error | sram_alert;
           Tests:       T1 T2 T3 
158                     
159                       prim_alert_sender #(
160                         .AsyncOn(AlertAsyncOn[0]),
161                         .IsFatal(1)
162                       ) u_prim_alert_sender_parity (
163                         .clk_i,
164                         .rst_ni,
165                         .alert_test_i  ( alert_test    ),
166                         .alert_req_i   ( alert_req     ),
167                         .alert_ack_o   (               ),
168                         .alert_state_o (               ),
169                         .alert_rx_i    ( alert_rx_i[0] ),
170                         .alert_tx_o    ( alert_tx_o[0] )
171                       );
172                     
173                       /////////////////////////
174                       // Escalation Triggers //
175                       /////////////////////////
176                     
177                       lc_tx_t [1:0] escalate_en;
178                       prim_lc_sync #(
179                         .NumCopies (2)
180                       ) u_prim_lc_sync (
181                         .clk_i,
182                         .rst_ni,
183                         .lc_en_i (lc_escalate_en_i),
184                         .lc_en_o (escalate_en)
185                       );
186                     
187                       // SEC_CM: KEY.GLOBAL_ESC
188                       logic escalate;
189        1/1            assign escalate = lc_tx_test_true_loose(escalate_en[0]);
           Tests:       T1 T2 T3 
190                       assign hw2reg.status.escalated.d  = 1'b1;
191        1/1            assign hw2reg.status.escalated.de = escalate;
           Tests:       T1 T2 T3 
192                     
193                       // SEC_CM: KEY.LOCAL_ESC
194                       // Aggregate external and internal escalation sources.
195                       // This is used in countermeasures further below (key reset and transaction blocking).
196                       logic local_esc, local_esc_reg;
197                       // This signal only aggregates registered escalation signals and is used for transaction
198                       // blocking further below, which is on a timing-critical path.
199        1/1            assign local_esc_reg = reg2hw.status.escalated.q  |
           Tests:       T1 T2 T3 
200                                              reg2hw.status.init_error.q |
201                                              reg2hw.status.bus_integ_error.q |
202                                              reg2hw.status.sram_alert.q |
203                                              reg2hw.status.readback_error.q;
204                       // This signal aggregates all escalation trigger signals, including the ones that are generated
205                       // in the same cycle such as init_error, sram alert, and bus_integ_error. It is used for
206                       // countermeasures that are not on the critical path (such as clearing the scrambling keys).
207        1/1            assign local_esc = escalate           |
           Tests:       T1 T2 T3 
208                                          init_error         |
209                                          (|bus_integ_error) |
210                                          sram_alert         |
211                                          readback_error     |
212                                          local_esc_reg;
213                     
214                       // Convert registered, local escalation sources to a multibit signal and combine this with
215                       // the incoming escalation enable signal before feeding into the TL-UL gate further below.
216                       lc_tx_t lc_tlul_gate_en;
217        1/1            assign lc_tlul_gate_en = lc_tx_inv(lc_tx_or_hi(escalate_en[1],
           Tests:       T1 T2 T3 
218                                                                      lc_tx_bool_to_lc_tx(local_esc_reg)));
219                       ///////////////////////
220                       // HW Initialization //
221                       ///////////////////////
222                     
223                       // A write to the init register reloads the LFSR seed, resets the init counter and
224                       // sets init_q to flag a pending initialization request.
225                       logic init_trig, init_q;
226        1/1            assign init_trig = reg2hw.ctrl.init.q &&
           Tests:       T1 T2 T3 
227                                          reg2hw.ctrl.init.qe &&
228                                          !init_q; // Ignore new requests while memory init is already pending.
229                     
230                       logic init_d, init_done;
231        1/1            assign init_d = (init_done) ? 1'b0 :
           Tests:       T1 T2 T3 
232                                       (init_trig) ? 1'b1 : init_q;
233                     
234                       always_ff @(posedge clk_i or negedge rst_ni) begin : p_init_reg
235        1/1              if(!rst_ni) begin
           Tests:       T1 T2 T3 
236        1/1                init_q <= 1'b0;
           Tests:       T1 T2 T3 
237                         end else begin
238        1/1                init_q <= init_d;
           Tests:       T1 T2 T3 
239                         end
240                       end
241                     
242                       // This waits until the scrambling keys are actually valid (this allows the SW to trigger
243                       // key renewal and initialization at the same time).
244                       logic init_req;
245                       logic [AddrWidth-1:0] init_cnt;
246                       logic key_req_pending_d, key_req_pending_q;
247        1/1            assign init_req  = init_q & ~key_req_pending_q;
           Tests:       T1 T2 T3 
248        1/1            assign init_done = (init_cnt == AddrWidth'(Depth - 1)) & init_req;
           Tests:       T1 T2 T3 
249                     
250                       // We employ two redundant counters to guard against FI attacks.
251                       // If any of the two is glitched and the two counter states do not agree,
252                       // we trigger an alert.
253                       // SEC_CM: INIT.CTR.REDUN
254                       prim_count #(
255                         .Width(AddrWidth)
256                       ) u_prim_count (
257                         .clk_i,
258                         .rst_ni,
259                         .clr_i(init_trig),
260                         .set_i(1'b0),
261                         .set_cnt_i('0),
262                         .incr_en_i(init_req),
263                         .decr_en_i(1'b0),
264                         .step_i(AddrWidth'(1)),
265                         .commit_i(1'b1),
266                         .cnt_o(init_cnt),
267                         .cnt_after_commit_o(),
268                         .err_o(init_error)
269                       );
270                     
271                       // Clear this bit on local escalation.
272        1/1            assign hw2reg.status.init_done.d  = init_done & ~init_trig & ~local_esc;
           Tests:       T1 T2 T3 
273        1/1            assign hw2reg.status.init_done.de = init_done | init_trig | local_esc;
           Tests:       T1 T2 T3 
274                     
275                       ////////////////////////////
276                       // Scrambling Key Request //
277                       ////////////////////////////
278                     
279                       // The scrambling key and nonce have to be requested from the OTP controller via a req/ack
280                       // protocol. Since the OTP controller works in a different clock domain, we have to synchronize
281                       // the req/ack protocol as described in more details here:
282                       // https://docs.opentitan.org/hw/ip/otp_ctrl/doc/index.html#interfaces-to-sram-and-otbn-scramblers
283                       logic key_req, key_ack;
284        1/1            assign key_req = reg2hw.ctrl.renew_scr_key.q &&
           Tests:       T1 T2 T3 
285                                        reg2hw.ctrl.renew_scr_key.qe &&
286                                        !key_req_pending_q && // Ignore new requests while a request is already pending.
287                                        !init_q; // Ignore new requests while memory init is already pending.
288                     
289        1/1            assign key_req_pending_d = (key_req) ? 1'b1 :
           Tests:       T1 T2 T3 
290                                                  (key_ack) ? 1'b0 : key_req_pending_q;
291                     
292                       // Clear this bit on local escalation.
293        1/1            assign hw2reg.status.scr_key_valid.d   = key_ack & ~key_req & ~local_esc;
           Tests:       T1 T2 T3 
294        1/1            assign hw2reg.status.scr_key_valid.de  = key_req | key_ack | local_esc;
           Tests:       T1 T2 T3 
295                     
296                       // As opposed to scr_key_valid, SW is responsible for clearing this register.
297                       // It is not automatically cleared by HW, except when escalating.
298        1/1            assign hw2reg.scr_key_rotated.d  = (key_ack & ~local_esc) ? MuBi4True : MuBi4False;
           Tests:       T1 T2 T3 
299        1/1            assign hw2reg.scr_key_rotated.de = key_ack | local_esc;
           Tests:       T1 T2 T3 
300                     
301                       // Clear this bit on local escalation.
302                       logic key_seed_valid;
303        1/1            assign hw2reg.status.scr_key_seed_valid.d  = key_seed_valid & ~local_esc;
           Tests:       T1 T2 T3 
304        1/1            assign hw2reg.status.scr_key_seed_valid.de = key_ack | local_esc;
           Tests:       T1 T2 T3 
305                     
306                       always_ff @(posedge clk_i or negedge rst_ni) begin : p_regs
307        1/1              if (!rst_ni) begin
           Tests:       T1 T2 T3 
308        1/1                key_req_pending_q <= 1'b0;
           Tests:       T1 T2 T3 
309                           // reset case does not use buffered values as the
310                           // reset value will be directly encoded into flop types
311        1/1                key_q             <= RndCnstSramKey;
           Tests:       T1 T2 T3 
312        1/1                nonce_q           <= RndCnstSramNonce;
           Tests:       T1 T2 T3 
313                         end else begin
314        1/1                key_req_pending_q <= key_req_pending_d;
           Tests:       T1 T2 T3 
315        1/1                if (key_ack) begin
           Tests:       T1 T2 T3 
316        1/1                  key_q   <= key_d;
           Tests:       T1 T2 T3 
317        1/1                  nonce_q <= nonce_d;
           Tests:       T1 T2 T3 
318                           end
                        MISSING_ELSE
319                           // This scraps the keys.
320                           // SEC_CM: KEY.GLOBAL_ESC
321                           // SEC_CM: KEY.LOCAL_ESC
322        1/1                if (local_esc) begin
           Tests:       T1 T2 T3 
323        1/1                  key_q   <= cnst_sram_key;
           Tests:       T4 T5 T6 
324        1/1                  nonce_q <= cnst_sram_nonce;
           Tests:       T4 T5 T6 
325                           end
                        MISSING_ELSE
326                         end
327                       end
328                     
329                       prim_sync_reqack_data #(
330                         .Width($bits(otp_ctrl_pkg::sram_otp_key_rsp_t)-1),
331                         .DataSrc2Dst(1'b0)
332                       ) u_prim_sync_reqack_data (
333                         .clk_src_i  ( clk_i              ),
334                         .rst_src_ni ( rst_ni             ),
335                         .clk_dst_i  ( clk_otp_i          ),
336                         .rst_dst_ni ( rst_otp_ni         ),
337                         .req_chk_i  ( 1'b1               ),
338                         .src_req_i  ( key_req_pending_q  ),
339                         .src_ack_o  ( key_ack            ),
340                         .dst_req_o  ( sram_otp_key_o.req ),
341                         .dst_ack_i  ( sram_otp_key_i.ack ),
342                         .data_i     ( {sram_otp_key_i.key,
343                                        sram_otp_key_i.nonce,
344                                        sram_otp_key_i.seed_valid} ),
345                         .data_o     ( {key_d,
346                                        nonce_d,
347                                        key_seed_valid} )
348                       );
349                     
350                       logic unused_csr_sigs;
351        1/1            assign unused_csr_sigs = ^{reg2hw.status.init_done.q,
           Tests:       T1 T2 T3 
352                                                  reg2hw.status.scr_key_seed_valid.q};
353                     
354                       ////////////////////
355                       // SRAM Execution //
356                       ////////////////////
357                     
358                       mubi4_t en_ifetch;
359                       if (InstrExec) begin : gen_instr_ctrl
360                         lc_tx_t lc_hw_debug_en;
361                         prim_lc_sync #(
362                           .NumCopies (1)
363                         ) u_prim_lc_sync_hw_debug_en (
364                           .clk_i,
365                           .rst_ni,
366                           .lc_en_i (lc_hw_debug_en_i),
367                           .lc_en_o ({lc_hw_debug_en})
368                         );
369                     
370                         mubi8_t otp_en_sram_ifetch;
371                         prim_mubi8_sync #(
372                           .NumCopies (1)
373                         ) u_prim_mubi8_sync_otp_en_sram_ifetch (
374                           .clk_i,
375                           .rst_ni,
376                           .mubi_i(otp_en_sram_ifetch_i),
377                           .mubi_o({otp_en_sram_ifetch})
378                         );
379                     
380                         mubi4_t lc_ifetch_en;
381                         mubi4_t reg_ifetch_en;
382                         // SEC_CM: INSTR.BUS.LC_GATED
383                         assign lc_ifetch_en = lc_to_mubi4(lc_hw_debug_en);
384                         // SEC_CM: EXEC.CONFIG.MUBI
385                         assign reg_ifetch_en = mubi4_t'(reg2hw.exec.q);
386                         // SEC_CM: EXEC.INTERSIG.MUBI
387                         assign en_ifetch = (mubi8_test_true_strict(otp_en_sram_ifetch)) ? reg_ifetch_en :
388                                                                                           lc_ifetch_en;
389                       end else begin : gen_tieoff
390                         assign en_ifetch = MuBi4False;
391                     
392                         // tie off unused signals
393                         logic unused_sigs;
394        1/1              assign unused_sigs = ^{lc_hw_debug_en_i,
           Tests:       T1 T2 T3 
395                                                reg2hw.exec.q,
396                                                otp_en_sram_ifetch_i};
397                       end
398                     
399                       /////////////////////////
400                       // Initialization LFSR //
401                       /////////////////////////
402                     
403                       logic [LfsrWidth-1:0] lfsr_out;
404                       prim_lfsr #(
405                         .LfsrDw      ( LfsrWidth       ),
406                         .EntropyDw   ( LfsrWidth       ),
407                         .StateOutDw  ( LfsrWidth       ),
408                         .DefaultSeed ( RndCnstLfsrSeed ),
409                         .StatePermEn ( 1'b1            ),
410                         .StatePerm   ( RndCnstLfsrPerm )
411                       ) u_lfsr (
412                         .clk_i,
413                         .rst_ni,
414                         .lfsr_en_i(init_req),
415                         .seed_en_i(init_trig),
416                         .seed_i(nonce_q[NonceWidth +: LfsrWidth]),
417                         .entropy_i('0),
418                         .state_o(lfsr_out)
419                       );
420                     
421                       // Compute the correct integrity alongside for the pseudo-random initialization values.
422                       logic [DataWidth - 1 :0] lfsr_out_integ;
423                       tlul_data_integ_enc u_tlul_data_integ_enc (
424                         .data_i(lfsr_out),
425                         .data_intg_o(lfsr_out_integ)
426                       );
427                     
428                       ////////////////////////////
429                       // SRAM TL-UL Access Gate //
430                       ////////////////////////////
431                     
432                       logic tl_gate_resp_pending;
433                       tlul_pkg::tl_h2d_t ram_tl_in_gated;
434                       tlul_pkg::tl_d2h_t ram_tl_out_gated;
435                     
436                       // SEC_CM: RAM_TL_LC_GATE.FSM.SPARSE
437                       tlul_lc_gate #(
438                         .NumGatesPerDirection(2)
439                       ) u_tlul_lc_gate (
440                         .clk_i,
441                         .rst_ni,
442                         .tl_h2d_i(ram_tl_i),
443                         .tl_d2h_o(ram_tl_o),
444                         .tl_h2d_o(ram_tl_in_gated),
445                         .tl_d2h_i(ram_tl_out_gated),
446                         .flush_req_i('0),
447                         .flush_ack_o(),
448                         .resp_pending_o(tl_gate_resp_pending),
449                         .lc_en_i (lc_tlul_gate_en),
450                         .err_o   (bus_integ_error[2])
451                       );
452                     
453                       /////////////////////////////////
454                       // SRAM with scrambling device //
455                       /////////////////////////////////
456                     
457                       logic tlul_req, tlul_gnt, tlul_we;
458                       logic [AddrWidth-1:0] tlul_addr;
459                       logic [DataWidth-1:0] tlul_wdata, tlul_wmask;
460                     
461                       logic sram_intg_error, sram_req, sram_gnt, sram_we, sram_rvalid;
462                       logic [AddrWidth-1:0] sram_addr;
463                       logic [DataWidth-1:0] sram_wdata, sram_wmask, sram_rdata;
464                       logic                 sram_wpending, sram_wr_collision;
465                     
466                       logic sram_compound_txn_in_progress;
467                     
468                     
469                       // // SEC_CM: MEM.READBACK
470                       mubi4_t reg_readback_en;
471        1/1            assign reg_readback_en = mubi4_t'(reg2hw.readback.q);
           Tests:       T1 T2 T3 
472                     
473                       tlul_adapter_sram #(
474                         .SramAw(AddrWidth),
475                         .SramDw(DataWidth - tlul_pkg::DataIntgWidth),
476                         .Outstanding(2),
477                         .ByteAccess(1),
478                         .CmdIntgCheck(1),
479                         .EnableRspIntgGen(1),
480                         .EnableDataIntgGen(0),
481                         .EnableDataIntgPt(1), // SEC_CM: MEM.INTEGRITY
482                         .SecFifoPtr      (1), // SEC_CM: TLUL_FIFO.CTR.REDUN
483                         .EnableReadback  (1)  // SEC_CM: MEM.READBACK
484                       ) u_tlul_adapter_sram (
485                         .clk_i,
486                         .rst_ni,
487                         .tl_i                       (ram_tl_in_gated),
488                         .tl_o                       (ram_tl_out_gated),
489                         .en_ifetch_i                (en_ifetch),
490                         .req_o                      (tlul_req),
491                         .req_type_o                 (),
492                         .gnt_i                      (tlul_gnt),
493                         .we_o                       (tlul_we),
494                         .addr_o                     (tlul_addr),
495                         .wdata_o                    (tlul_wdata),
496                         .wmask_o                    (tlul_wmask),
497                         // SEC_CM: BUS.INTEGRITY
498                         .intg_error_o               (bus_integ_error[1]),
499                         .rdata_i                    (sram_rdata),
500                         .rvalid_i                   (sram_rvalid),
501                         .rerror_i                   ('0),
502                         .compound_txn_in_progress_o (sram_compound_txn_in_progress),
503                         .readback_en_i              (reg_readback_en),
504                         .readback_error_o           (readback_error),
505                         .wr_collision_i             (sram_wr_collision),
506                         .write_pending_i            (sram_wpending)
507                       );
508                     
509                       logic key_valid;
510                     
511                       // Interposing mux logic for initialization with pseudo random data.
512        1/1            assign sram_req        = tlul_req | init_req;
           Tests:       T1 T2 T3 
513                       // This grant signal acts more like a ready internally in tlul_adapter_sram. In particular it's
514                       // fine to assert it when tlul_req is low (it has no effect). So here tlul_gnt is asserted when
515                       // a request from tlul_req will be granted regardless of whether a request exists. This is done
516                       // for timing reasons so that the output TL ready isn't combinatorially connected to the incoming
517                       // TL valid. In particular we must not use `sram_gnt` in the expression to avoid this.
518        1/1            assign tlul_gnt        = key_valid & ~init_req;
           Tests:       T1 T2 T3 
519        1/1            assign sram_we         = tlul_we | init_req;
           Tests:       T1 T2 T3 
520        1/1            assign sram_intg_error = |bus_integ_error[2:1] & ~init_req;
           Tests:       T1 T2 T3 
521        1/1            assign sram_addr       = (init_req) ? init_cnt          : tlul_addr;
           Tests:       T1 T2 T3 
522        1/1            assign sram_wdata      = (init_req) ? lfsr_out_integ    : tlul_wdata;
           Tests:       T1 T2 T3 
523        1/1            assign sram_wmask      = (init_req) ? {DataWidth{1'b1}} : tlul_wmask;
           Tests:       T1 T2 T3 
524                     
525                       // The SRAM scrambling wrapper will not accept any transactions while the
526                       // key req is pending or if we have escalated. Note that we're not using
527                       // the scr_key_valid CSR here, such that the SRAM can be used right after
528                       // reset, where the keys are reset to the default netlist constant.
529                       //
530                       // If we have escalated, but there is a pending request in the TL gate, we may have a pending
531                       // read-modify-write transaction or readback in the SRAM adapter. In that case we force key_valid
532                       // high to enable that to complete so it returns a response, the TL gate won't accept any new
533                       // transactions and the SRAM keys have been clobbered already.
534        1/1            assign key_valid =
           Tests:       T1 T2 T3 
535                         (key_req_pending_q)         ? 1'b0 :
536                         (reg2hw.status.escalated.q) ? (tl_gate_resp_pending & sram_compound_txn_in_progress) : 1'b1;
537                     
538                       // SEC_CM: MEM.SCRAMBLE, ADDR.SCRAMBLE
539                       prim_ram_1p_scr #(
540                         .Width(DataWidth),
541                         .Depth(Depth),
542                         .EnableParity(0),
543                         .DataBitsPerMask(DataWidth),
544                         .NumPrinceRoundsHalf(NumPrinceRoundsHalf)
545                       ) u_prim_ram_1p_scr (
546                         .clk_i,
547                         .rst_ni,
548                     
549                         .key_valid_i      (key_valid),
550                         .key_i            (key_q),
551                         .nonce_i          (nonce_q[NonceWidth-1:0]),
552                     
553                         .req_i            (sram_req),
554                         .intg_error_i     (sram_intg_error),
555                         .gnt_o            (sram_gnt),
556                         .write_i          (sram_we),
557                         .addr_i           (sram_addr),
558                         .wdata_i          (sram_wdata),
559                         .wmask_i          (sram_wmask),
560                         .rdata_o          (sram_rdata),
561                         .rvalid_o         (sram_rvalid),
562                         .rerror_o         ( ),
563                         .raddr_o          ( ),
564                         .cfg_i,
565                         .wr_collision_o   (sram_wr_collision),
566                         .write_pending_o  (sram_wpending),
567                         .alert_o          (sram_alert)
568                       );
569                     
570                       logic unused_sram_gnt;
571                       // Ignore sram_gnt signal to avoid creating a bad timing path, see comment on `tlul_gnt` above for
572                       // more details.
573        1/1            assign unused_sram_gnt = sram_gnt;
           Tests:       T1 T2 T3 

---

Cond Coverage for Module : sram_ctrl

	Total	Covered	Percent
Conditions	101	88	87.13
Logical	101	88	87.13
Non-Logical	0	0
Event	0	0

 LINE       139
 EXPRESSION (reg2hw.alert_test.q & reg2hw.alert_test.qe)
             ---------1---------   ----------2---------

-1-	-2-	Status	Tests
0	1	Covered	T11,T13,T14
1	0	Covered	T1,T2,T3
1	1	Covered	T11,T13,T14

 LINE       157
 EXPRESSION (((|bus_integ_error)) | init_error | readback_error | sram_alert)
             ----------1---------   -----2----   -------3------   -----4----

-1-	-2-	-3-	-4-	Status	Tests
0	0	0	0	Covered	T1,T2,T3
0	0	0	1	Not Covered
0	0	1	0	Not Covered
0	1	0	0	Covered	T5,T15,T16
1	0	0	0	Covered	T5,T15,T16

 LINE       199
 EXPRESSION 
 Number  Term
      1  reg2hw.status.escalated.q | 
      2  reg2hw.status.init_error.q | 
      3  reg2hw.status.bus_integ_error.q | 
      4  reg2hw.status.sram_alert.q | 
      5  reg2hw.status.readback_error.q)

-1-	-2-	-3-	-4-	-5-	Status	Tests
0	0	0	0	0	Covered	T1,T2,T3
0	0	0	0	1	Not Covered
0	0	0	1	0	Not Covered
0	0	1	0	0	Covered	T5,T15,T16
0	1	0	0	0	Covered	T5,T15,T16
1	0	0	0	0	Covered	T4,T6,T7

 LINE       207
 EXPRESSION (escalate | init_error | ((|bus_integ_error)) | sram_alert | readback_error | local_esc_reg)
             ----1---   -----2----   ----------3---------   -----4----   -------5------   ------6------

-1-	-2-	-3-	-4-	-5-	-6-	Status	Tests
0	0	0	0	0	0	Covered	T1,T2,T3
0	0	0	0	0	1	Covered	T4,T5,T6
0	0	0	0	1	0	Not Covered
0	0	0	1	0	0	Not Covered
0	0	1	0	0	0	Covered	T5,T15,T16
0	1	0	0	0	0	Covered	T5,T15,T16
1	0	0	0	0	0	Covered	T4,T6,T7

 LINE       226
 EXPRESSION (reg2hw.ctrl.init.q && reg2hw.ctrl.init.qe && ((!init_q)))
             ---------1--------    ---------2---------    -----3-----

-1-	-2-	-3-	Status	Tests
0	1	1	Covered	T4,T6,T7
1	0	1	Covered	T1,T2,T3
1	1	0	Not Covered
1	1	1	Covered	T1,T2,T3

 LINE       231
 EXPRESSION (init_done ? 1'b0 : (init_trig ? 1'b1 : init_q))
             ----1----

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

 LINE       231
 SUB-EXPRESSION (init_trig ? 1'b1 : init_q)
                 ----1----

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

 LINE       247
 EXPRESSION (init_q & ((~key_req_pending_q)))
             ---1--   -----------2----------

-1-	-2-	Status	Tests
0	1	Covered	T1,T2,T3
1	0	Covered	T1,T2,T3
1	1	Covered	T1,T2,T3

 LINE       248
 EXPRESSION ((init_cnt == 10'((Depth - 1))) & init_req)
             ---------------1--------------   ----2---

-1-	-2-	Status	Tests
0	1	Covered	T1,T2,T3
1	0	Covered	T1,T2,T3
1	1	Covered	T1,T2,T3

 LINE       248
 SUB-EXPRESSION (init_cnt == 10'((Depth - 1)))
                ---------------1--------------

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

 LINE       272
 EXPRESSION (init_done & ((~init_trig)) & ((~local_esc)))
             ----1----   -------2------   -------3------

-1-	-2-	-3-	Status	Tests
0	1	1	Covered	T1,T2,T3
1	0	1	Not Covered
1	1	0	Covered	T4,T6,T7
1	1	1	Covered	T1,T2,T3

 LINE       273
 EXPRESSION (init_done | init_trig | local_esc)
             ----1----   ----2----   ----3----

-1-	-2-	-3-	Status	Tests
0	0	0	Covered	T1,T2,T3
0	0	1	Covered	T4,T5,T6
0	1	0	Covered	T1,T2,T3
1	0	0	Covered	T1,T2,T3

 LINE       284
 EXPRESSION (reg2hw.ctrl.renew_scr_key.q && reg2hw.ctrl.renew_scr_key.qe && ((!key_req_pending_q)) && ((!init_q)))
             -------------1-------------    --------------2-------------    -----------3----------    -----4-----

-1-	-2-	-3-	-4-	Status	Tests
0	1	1	1	Covered	T17,T18,T19
1	0	1	1	Covered	T1,T2,T3
1	1	0	1	Not Covered
1	1	1	0	Not Covered
1	1	1	1	Covered	T1,T2,T3

 LINE       289
 EXPRESSION (key_req ? 1'b1 : (key_ack ? 1'b0 : key_req_pending_q))
             ---1---

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

 LINE       289
 SUB-EXPRESSION (key_ack ? 1'b0 : key_req_pending_q)
                 ---1---

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

 LINE       293
 EXPRESSION (key_ack & ((~key_req)) & ((~local_esc)))
             ---1---   ------2-----   -------3------

-1-	-2-	-3-	Status	Tests
0	1	1	Covered	T1,T2,T3
1	0	1	Not Covered
1	1	0	Covered	T4,T6,T7
1	1	1	Covered	T1,T2,T3

 LINE       294
 EXPRESSION (key_req | key_ack | local_esc)
             ---1---   ---2---   ----3----

-1-	-2-	-3-	Status	Tests
0	0	0	Covered	T1,T2,T3
0	0	1	Covered	T4,T5,T6
0	1	0	Covered	T1,T2,T3
1	0	0	Covered	T1,T2,T3

 LINE       298
 EXPRESSION ((key_ack & ((~local_esc))) ? MuBi4True : MuBi4False)
             -------------1------------

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

 LINE       298
 SUB-EXPRESSION (key_ack & ((~local_esc)))
                 ---1---   -------2------

-1-	-2-	Status	Tests
0	1	Covered	T1,T2,T3
1	0	Covered	T4,T6,T7
1	1	Covered	T1,T2,T3

 LINE       299
 EXPRESSION (key_ack | local_esc)
             ---1---   ----2----

-1-	-2-	Status	Tests
0	0	Covered	T1,T2,T3
0	1	Covered	T4,T5,T6
1	0	Covered	T1,T2,T3

 LINE       303
 EXPRESSION (key_seed_valid & ((~local_esc)))
             -------1------   -------2------

-1-	-2-	Status	Tests
0	1	Covered	T1,T4,T8
1	0	Covered	T4,T6,T7
1	1	Covered	T2,T3,T4

 LINE       304
 EXPRESSION (key_ack | local_esc)
             ---1---   ----2----

-1-	-2-	Status	Tests
0	0	Covered	T1,T2,T3
0	1	Covered	T4,T5,T6
1	0	Covered	T1,T2,T3

 LINE       512
 EXPRESSION (tlul_req | init_req)
             ----1---   ----2---

-1-	-2-	Status	Tests
0	0	Covered	T1,T2,T3
0	1	Covered	T1,T2,T3
1	0	Covered	T2,T3,T4

 LINE       518
 EXPRESSION (key_valid & ((~init_req)))
             ----1----   ------2------

-1-	-2-	Status	Tests
0	1	Covered	T1,T2,T3
1	0	Covered	T1,T2,T3
1	1	Covered	T1,T2,T3

 LINE       519
 EXPRESSION (tlul_we | init_req)
             ---1---   ----2---

-1-	-2-	Status	Tests
0	0	Covered	T1,T2,T3
0	1	Covered	T1,T2,T3
1	0	Covered	T2,T3,T4

 LINE       520
 EXPRESSION (((|bus_integ_error[2:1])) & ((~init_req)))
             ------------1------------   ------2------

-1-	-2-	Status	Tests
0	1	Covered	T1,T2,T3
1	0	Not Covered
1	1	Covered	T5,T15,T16

 LINE       521
 EXPRESSION (init_req ? init_cnt : tlul_addr)
             ----1---

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

 LINE       522
 EXPRESSION (init_req ? lfsr_out_integ : tlul_wdata)
             ----1---

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

 LINE       523
 EXPRESSION (init_req ? ({sram_ctrl_pkg::DataWidth {1'b1}}) : tlul_wmask)
             ----1---

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

 LINE       534
 EXPRESSION (key_req_pending_q ? 1'b0 : (reg2hw.status.escalated.q ? (tl_gate_resp_pending & sram_compound_txn_in_progress) : 1'b1))
             --------1--------

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

 LINE       534
 SUB-EXPRESSION (reg2hw.status.escalated.q ? (tl_gate_resp_pending & sram_compound_txn_in_progress) : 1'b1)
                 ------------1------------

-1-	Status	Tests
0	Covered	T1,T2,T3
1	Covered	T4,T6,T7

 LINE       534
 SUB-EXPRESSION (tl_gate_resp_pending & sram_compound_txn_in_progress)
                 ----------1---------   --------------2--------------

-1-	-2-	Status	Tests
0	1	Not Covered
1	0	Covered	T4,T6,T7
1	1	Covered	T6,T7,T20

---

Toggle Coverage for Module : sram_ctrl

	Total	Covered	Percent
Totals	62	62	100.00
Total Bits	1230	1230	100.00
Total Bits 0->1	615	615	100.00
Total Bits 1->0	615	615	100.00

Ports	62	62	100.00
Port Bits	1230	1230	100.00
Port Bits 0->1	615	615	100.00
Port Bits 1->0	615	615	100.00

Port Details

Name	Toggle	Toggle 1->0	Tests	Toggle 0->1	Tests	Direction
clk_i	Yes	Yes	T1,T2,T3	Yes	T1,T2,T3	INPUT
rst_ni	Yes	Yes	T4,T5,T6	Yes	T1,T2,T3	INPUT
clk_otp_i	Yes	Yes	T1,T2,T3	Yes	T1,T2,T3	INPUT
rst_otp_ni	Yes	Yes	T4,T5,T6	Yes	T1,T2,T3	INPUT
ram_tl_i.d_ready	Yes	Yes	T1,T2,T4	Yes	T1,T2,T3	INPUT
ram_tl_i.a_user.data_intg[6:0]	Yes	Yes	T2,T3,T4	Yes	T2,T3,T4	INPUT
ram_tl_i.a_user.cmd_intg[6:0]	Yes	Yes	T2,T3,T4	Yes	T2,T3,T4	INPUT
ram_tl_i.a_user.instr_type[3:0]	Yes	Yes	T4,T10,T21	Yes	T4,T10,T21	INPUT
ram_tl_i.a_user.rsvd[4:0]	Unreachable	Unreachable		Unreachable		INPUT
ram_tl_i.a_data[31:0]	Yes	Yes	T2,T3,T4	Yes	T2,T3,T4	INPUT
ram_tl_i.a_mask[3:0]	Yes	Yes	T2,T3,T4	Yes	T2,T3,T4	INPUT
ram_tl_i.a_address[31:0]	Yes	Yes	T2,T3,T4	Yes	T2,T3,T4	INPUT
ram_tl_i.a_source[7:0]	Yes	Yes	T2,T3,T4	Yes	T2,T3,T4	INPUT
ram_tl_i.a_size[1:0]	Yes	Yes	T2,T3,T4	Yes	T2,T3,T4	INPUT
ram_tl_i.a_param[2:0]	Unreachable	Unreachable		Unreachable		INPUT
ram_tl_i.a_opcode[2:0]	Yes	Yes	T2,T3,T4	Yes	T2,T3,T4	INPUT
ram_tl_i.a_valid	Yes	Yes	T2,T3,T4	Yes	T2,T3,T4	INPUT
ram_tl_o.a_ready	Yes	Yes	T1,T2,T3	Yes	T1,T2,T3	OUTPUT
ram_tl_o.d_error	Yes	Yes	T1,T2,T3	Yes	T4,T5,T6	OUTPUT
ram_tl_o.d_user.data_intg[6:0]	Yes	Yes	T2,T3,T4	Yes	T2,T3,T4	OUTPUT
ram_tl_o.d_user.rsp_intg[5:0]	Yes	Yes	T2,T3,T4	Yes	T1,T2,T3	OUTPUT
ram_tl_o.d_user.rsp_intg[6]	Unreachable	Unreachable		Unreachable		OUTPUT
ram_tl_o.d_data[31:0]	Yes	Yes	T2,T3,T4	Yes	T2,T3,T4	OUTPUT
ram_tl_o.d_sink	Unreachable	Unreachable		Unreachable		OUTPUT
ram_tl_o.d_source[7:0]	Yes	Yes	T2,T3,T4	Yes	T2,T3,T4	OUTPUT
ram_tl_o.d_size[1:0]	Yes	Yes	T2,T3,T4	Yes	T2,T3,T4	OUTPUT
ram_tl_o.d_param[2:0]	Unreachable	Unreachable		Unreachable		OUTPUT
ram_tl_o.d_opcode[0]	Yes	Yes	*T2,*T3,*T4	Yes	T2,T3,T4	OUTPUT
ram_tl_o.d_opcode[2:1]	Unreachable	Unreachable		Unreachable		OUTPUT
ram_tl_o.d_valid	Yes	Yes	T2,T3,T4	Yes	T2,T3,T4	OUTPUT
regs_tl_i.d_ready	Yes	Yes	T1,T2,T4	Yes	T1,T2,T3	INPUT
regs_tl_i.a_user.data_intg[6:0]	Yes	Yes	T2,T4,T8	Yes	T4,T8,T11	INPUT
regs_tl_i.a_user.cmd_intg[6:0]	Yes	Yes	T2,T4,T8	Yes	T2,T4,T8	INPUT
regs_tl_i.a_user.instr_type[3:0]	Yes	Yes	T2,T8,T11	Yes	T2,T8,T11	INPUT
regs_tl_i.a_user.rsvd[4:0]	Unreachable	Unreachable		Unreachable		INPUT
regs_tl_i.a_data[31:0]	Yes	Yes	T4,T8,T10	Yes	T2,T4,T8	INPUT
regs_tl_i.a_mask[3:0]	Yes	Yes	T4,T8,T11	Yes	T2,T4,T11	INPUT
regs_tl_i.a_address[31:0]	Yes	Yes	T2,T4,T11	Yes	T2,T4,T11	INPUT
regs_tl_i.a_source[7:0]	Yes	Yes	T4,T8,T10	Yes	T4,T8,T11	INPUT
regs_tl_i.a_size[1:0]	Yes	Yes	T2,T4,T8	Yes	T2,T4,T8	INPUT
regs_tl_i.a_param[2:0]	Unreachable	Unreachable		Unreachable		INPUT
regs_tl_i.a_opcode[2:0]	Yes	Yes	T2,T4,T8	Yes	T2,T3,T4	INPUT
regs_tl_i.a_valid	Yes	Yes	T1,T2,T3	Yes	T1,T2,T3	INPUT
regs_tl_o.a_ready	Yes	Yes	T1,T2,T3	Yes	T1,T2,T3	OUTPUT
regs_tl_o.d_error	Yes	Yes	T22,T23,T24	Yes	T22,T23,T24	OUTPUT
regs_tl_o.d_user.data_intg[6:0]	Yes	Yes	T4,T5,T6	Yes	T4,T5,T6	OUTPUT
regs_tl_o.d_user.rsp_intg[5:0]	Yes	Yes	*T4,*T10,*T11	Yes	T2,T3,T4	OUTPUT
regs_tl_o.d_user.rsp_intg[6]	Unreachable	Unreachable		Unreachable		OUTPUT
regs_tl_o.d_data[31:0]	Yes	Yes	T4,T5,T6	Yes	T1,T2,T3	OUTPUT
regs_tl_o.d_sink	Unreachable	Unreachable		Unreachable		OUTPUT
regs_tl_o.d_source[7:0]	Yes	Yes	T4,T10,T11	Yes	T3,T4,T8	OUTPUT
regs_tl_o.d_size[1:0]	Yes	Yes	T4,T10,T9	Yes	T2,T4,T8	OUTPUT
regs_tl_o.d_param[2:0]	Unreachable	Unreachable		Unreachable		OUTPUT
regs_tl_o.d_opcode[0]	Yes	Yes	*T4,*T5,*T6	Yes	T4,T5,T6	OUTPUT
regs_tl_o.d_opcode[2:1]	Unreachable	Unreachable		Unreachable		OUTPUT
regs_tl_o.d_valid	Yes	Yes	T1,T2,T3	Yes	T1,T2,T3	OUTPUT
alert_rx_i[0].ack_n	Yes	Yes	T1,T2,T3	Yes	T1,T2,T3	INPUT
alert_rx_i[0].ack_p	Yes	Yes	T11,T5,T13	Yes	T11,T5,T13	INPUT
alert_rx_i[0].ping_n	Unreachable	Unreachable		Unreachable		INPUT
alert_rx_i[0].ping_p	Unreachable	Unreachable		Unreachable		INPUT
alert_tx_o[0].alert_n	Yes	Yes	T1,T2,T3	Yes	T1,T2,T3	OUTPUT
alert_tx_o[0].alert_p	Yes	Yes	T11,T5,T13	Yes	T11,T5,T13	OUTPUT
lc_escalate_en_i[3:0]	Yes	Yes	T4,T6,T7	Yes	T4,T6,T7	INPUT
lc_hw_debug_en_i[3:0]	Yes	Yes	T22,T23,T24	Yes	T22,T23,T24	INPUT
otp_en_sram_ifetch_i[7:0]	Yes	Yes	T22,T23,T24	Yes	T22,T23,T24	INPUT
sram_otp_key_o.req	Yes	Yes	T1,T2,T3	Yes	T1,T2,T3	OUTPUT
sram_otp_key_i.seed_valid	Yes	Yes	T4,T21,T6	Yes	T4,T6,T7	INPUT
sram_otp_key_i.nonce[127:0]	Yes	Yes	T4,T9,T21	Yes	T3,T4,T6	INPUT
sram_otp_key_i.key[127:0]	Yes	Yes	T4,T21,T6	Yes	T3,T4,T9	INPUT
sram_otp_key_i.ack	Yes	Yes	T1,T2,T3	Yes	T1,T2,T3	INPUT
cfg_i.rf_cfg.cfg[3:0]	Yes	Yes	T1,T12,T25	Yes	T1,T12,T25	INPUT
cfg_i.rf_cfg.cfg_en	Yes	Yes	T1,T12,T25	Yes	T1,T12,T25	INPUT
cfg_i.rf_cfg.test	Yes	Yes	T1,T12,T25	Yes	T1,T12,T25	INPUT
cfg_i.ram_cfg.cfg[3:0]	Yes	Yes	T1,T12,T25	Yes	T1,T12,T25	INPUT
cfg_i.ram_cfg.cfg_en	Yes	Yes	T1,T12,T25	Yes	T1,T12,T25	INPUT
cfg_i.ram_cfg.test	Yes	Yes	T1,T12,T25	Yes	T1,T12,T25	INPUT

*Tests covering at least one bit in the range

---

Branch Coverage for Module : sram_ctrl

	Line No.	Total	Covered	Percent
Branches		24	24	100.00
TERNARY	231	3	3	100.00
TERNARY	289	3	3	100.00
TERNARY	298	2	2	100.00
TERNARY	521	2	2	100.00
TERNARY	522	2	2	100.00
TERNARY	523	2	2	100.00
TERNARY	534	3	3	100.00
IF	235	2	2	100.00
IF	307	5	5	100.00

231          assign init_d = (init_done) ? 1'b0 :
                                         -1-  
                                         ==>  
232                          (init_trig) ? 1'b1 : init_q;
                                         -2-  
                                         ==>  
                                         ==>  

Branches:

-1-	-2-	Status	Tests
1	-	Covered	T1,T2,T3
0	1	Covered	T1,T2,T3
0	0	Covered	T1,T2,T3

289          assign key_req_pending_d = (key_req) ? 1'b1 :
                                                  -1-  
                                                  ==>  
290                                     (key_ack) ? 1'b0 : key_req_pending_q;
                                                  -2-  
                                                  ==>  
                                                  ==>  

Branches:

-1-	-2-	Status	Tests
1	-	Covered	T1,T2,T3
0	1	Covered	T1,T2,T3
0	0	Covered	T1,T2,T3

298          assign hw2reg.scr_key_rotated.d  = (key_ack & ~local_esc) ? MuBi4True : MuBi4False;
                                                                       -1-  
                                                                       ==>  
                                                                       ==>  

Branches:

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

521          assign sram_addr       = (init_req) ? init_cnt          : tlul_addr;
                                                 -1-  
                                                 ==>  
                                                 ==>  

Branches:

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

522          assign sram_wdata      = (init_req) ? lfsr_out_integ    : tlul_wdata;
                                                 -1-  
                                                 ==>  
                                                 ==>  

Branches:

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

523          assign sram_wmask      = (init_req) ? {DataWidth{1'b1}} : tlul_wmask;
                                                 -1-  
                                                 ==>  
                                                 ==>  

Branches:

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

534          assign key_valid =
                               
535            (key_req_pending_q)         ? 1'b0 :
                                           -1-  
                                           ==>  
536            (reg2hw.status.escalated.q) ? (tl_gate_resp_pending & sram_compound_txn_in_progress) : 1'b1;
                                           -2-  
                                           ==>  
                                           ==>  

Branches:

-1-	-2-	Status	Tests
1	-	Covered	T1,T2,T3
0	1	Covered	T4,T6,T7
0	0	Covered	T1,T2,T3

235            if(!rst_ni) begin
               -1-  
236              init_q <= 1'b0;
                 ==>
237            end else begin
238              init_q <= init_d;
                 ==>

Branches:

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

307            if (!rst_ni) begin
               -1-  
308              key_req_pending_q <= 1'b0;
                 ==>
309              // reset case does not use buffered values as the
310              // reset value will be directly encoded into flop types
311              key_q             <= RndCnstSramKey;
312              nonce_q           <= RndCnstSramNonce;
313            end else begin
314              key_req_pending_q <= key_req_pending_d;
315              if (key_ack) begin
                 -2-  
316                key_q   <= key_d;
                   ==>
317                nonce_q <= nonce_d;
318              end
                 MISSING_ELSE
                 ==>
319              // This scraps the keys.
320              // SEC_CM: KEY.GLOBAL_ESC
321              // SEC_CM: KEY.LOCAL_ESC
322              if (local_esc) begin
                 -3-  
323                key_q   <= cnst_sram_key;
                   ==>
324                nonce_q <= cnst_sram_nonce;
325              end
                 MISSING_ELSE
                 ==>

Branches:

-1-	-2-	-3-	Status	Tests
1	-	-	Covered	T1,T2,T3
0	1	-	Covered	T1,T2,T3
0	0	-	Covered	T1,T2,T3
0	-	1	Covered	T4,T5,T6
0	-	0	Covered	T1,T2,T3

---

Assert Coverage for Module : sram_ctrl

	Total	Attempted	Percent	Succeeded/Matched	Percent
Assertions	17	17	100.00	12	70.59
Cover properties	0	0		0
Cover sequences	0	0		0
Total	17	17	100.00	12	70.59

---

Assertion Details

Name	Attempts	Real Successes	Failures	Incomplete
AlertOutKnown_A	322406092	322303845	0	0
FpvSecCmCntCheck_A	322406092	70	0	0
FpvSecCmLcGateFsmCheck_A	322406092	0	0	0
FpvSecCmRegWeOnehotCheck_A	322406092	70	0	0
FpvSecCmReqFifoRptrCheck_A	322406092	0	0	0
FpvSecCmReqFifoWptrCheck_A	322406092	0	0	0
FpvSecCmRspFifoRptrCheck_A	322406092	70	0	0
FpvSecCmRspFifoWptrCheck_A	322406092	70	0	0
FpvSecCmSramReqFifoRptrCheck_A	322406092	0	0	0
FpvSecCmSramReqFifoWptrCheck_A	322406092	0	0	0
NonceWidthsLessThanSource_A	893	893	0	0
RamTlOutKnown_A	322406092	322303845	0	0
RamTlOutPayLoadKnown_A	322406092	133031396	0	0
RamTlOutPayLoadKnown_AKnownEnable	322406092	322303845	0	0
RegsTlOutKnown_A	322406092	322303845	0	0
SramOtpKeyKnown_A	322406092	322303845	0	0
TlulGntIsCorrect_A	322406092	65737425	0	0

AlertOutKnown_A

Name	Attempts	Real Successes	Failures	Incomplete
Total	322406092	322303845	0	0
T1	1623	1567	0	0
T2	9045	8990	0	0
T3	4225	4148	0	0
T4	32061	31902	0	0
T5	11232	8552	0	0
T8	18819	18746	0	0
T9	5321	5243	0	0
T10	28255	28199	0	0
T11	1354	1292	0	0
T12	2447	2383	0	0

FpvSecCmCntCheck_A

Name	Attempts	Real Successes	Failures	Incomplete
Total	322406092	70	0	0
T5	11232	10	0	0
T6	28229	0	0	0
T13	1154	0	0	0
T14	723	0	0	0
T15	16365	20	0	0
T16	0	20	0	0
T21	6692	0	0	0
T25	1986	0	0	0
T26	0	10	0	0
T27	0	10	0	0
T28	33450	0	0	0
T29	4213	0	0	0
T30	27749	0	0	0

FpvSecCmLcGateFsmCheck_A

Name	Attempts	Real Successes	Failures	Incomplete
Total	322406092	0	0	0

FpvSecCmRegWeOnehotCheck_A

Name	Attempts	Real Successes	Failures	Incomplete
Total	322406092	70	0	0
T5	11232	10	0	0
T6	28229	0	0	0
T13	1154	0	0	0
T14	723	0	0	0
T15	16365	20	0	0
T16	0	20	0	0
T21	6692	0	0	0
T25	1986	0	0	0
T26	0	10	0	0
T27	0	10	0	0
T28	33450	0	0	0
T29	4213	0	0	0
T30	27749	0	0	0

FpvSecCmReqFifoRptrCheck_A

Name	Attempts	Real Successes	Failures	Incomplete
Total	322406092	0	0	0

FpvSecCmReqFifoWptrCheck_A

Name	Attempts	Real Successes	Failures	Incomplete
Total	322406092	0	0	0

FpvSecCmRspFifoRptrCheck_A

Name	Attempts	Real Successes	Failures	Incomplete
Total	322406092	70	0	0
T5	11232	10	0	0
T6	28229	0	0	0
T13	1154	0	0	0
T14	723	0	0	0
T15	16365	20	0	0
T16	0	20	0	0
T21	6692	0	0	0
T25	1986	0	0	0
T26	0	10	0	0
T27	0	10	0	0
T28	33450	0	0	0
T29	4213	0	0	0
T30	27749	0	0	0

FpvSecCmRspFifoWptrCheck_A

Name	Attempts	Real Successes	Failures	Incomplete
Total	322406092	70	0	0
T5	11232	10	0	0
T6	28229	0	0	0
T13	1154	0	0	0
T14	723	0	0	0
T15	16365	20	0	0
T16	0	20	0	0
T21	6692	0	0	0
T25	1986	0	0	0
T26	0	10	0	0
T27	0	10	0	0
T28	33450	0	0	0
T29	4213	0	0	0
T30	27749	0	0	0

FpvSecCmSramReqFifoRptrCheck_A

Name	Attempts	Real Successes	Failures	Incomplete
Total	322406092	0	0	0

FpvSecCmSramReqFifoWptrCheck_A

Name	Attempts	Real Successes	Failures	Incomplete
Total	322406092	0	0	0

NonceWidthsLessThanSource_A

Name	Attempts	Real Successes	Failures	Incomplete
Total	893	893	0	0
T1	1	1	0	0
T2	1	1	0	0
T3	1	1	0	0
T4	1	1	0	0
T5	1	1	0	0
T8	1	1	0	0
T9	1	1	0	0
T10	1	1	0	0
T11	1	1	0	0
T12	1	1	0	0

RamTlOutKnown_A

Name	Attempts	Real Successes	Failures	Incomplete
Total	322406092	322303845	0	0
T1	1623	1567	0	0
T2	9045	8990	0	0
T3	4225	4148	0	0
T4	32061	31902	0	0
T5	11232	8552	0	0
T8	18819	18746	0	0
T9	5321	5243	0	0
T10	28255	28199	0	0
T11	1354	1292	0	0
T12	2447	2383	0	0

RamTlOutPayLoadKnown_A

Name	Attempts	Real Successes	Failures	Incomplete
Total	322406092	133031396	0	0
T2	9045	2704	0	0
T3	4225	765	0	0
T4	32061	2271	0	0
T5	11232	527	0	0
T6	0	2776	0	0
T8	18819	8581	0	0
T9	5321	2379	0	0
T10	28255	9099	0	0
T11	1354	0	0	0
T12	2447	0	0	0
T21	6692	3253	0	0
T28	0	13703	0	0

RamTlOutPayLoadKnown_AKnownEnable

Name	Attempts	Real Successes	Failures	Incomplete
Total	322406092	322303845	0	0
T1	1623	1567	0	0
T2	9045	8990	0	0
T3	4225	4148	0	0
T4	32061	31902	0	0
T5	11232	8552	0	0
T8	18819	18746	0	0
T9	5321	5243	0	0
T10	28255	28199	0	0
T11	1354	1292	0	0
T12	2447	2383	0	0

RegsTlOutKnown_A

Name	Attempts	Real Successes	Failures	Incomplete
Total	322406092	322303845	0	0
T1	1623	1567	0	0
T2	9045	8990	0	0
T3	4225	4148	0	0
T4	32061	31902	0	0
T5	11232	8552	0	0
T8	18819	18746	0	0
T9	5321	5243	0	0
T10	28255	28199	0	0
T11	1354	1292	0	0
T12	2447	2383	0	0

SramOtpKeyKnown_A

Name	Attempts	Real Successes	Failures	Incomplete
Total	322406092	322303845	0	0
T1	1623	1567	0	0
T2	9045	8990	0	0
T3	4225	4148	0	0
T4	32061	31902	0	0
T5	11232	8552	0	0
T8	18819	18746	0	0
T9	5321	5243	0	0
T10	28255	28199	0	0
T11	1354	1292	0	0
T12	2447	2383	0	0

TlulGntIsCorrect_A

Name	Attempts	Real Successes	Failures	Incomplete
Total	322406092	65737425	0	0
T2	9045	637	0	0
T3	4225	833	0	0
T4	32061	659	0	0
T5	11232	0	0	0
T6	0	811	0	0
T8	18819	4680	0	0
T9	5321	2379	0	0
T10	28255	4868	0	0
T11	1354	0	0	0
T12	2447	0	0	0
T21	6692	3545	0	0
T28	0	5410	0	0
T29	0	1547	0	0

Line Coverage for Instance : tb.dut

	Line No.	Total	Covered	Percent
TOTAL		52	52	100.00
CONT_ASSIGN	131	1	1	100.00
CONT_ASSIGN	139	1	1	100.00
CONT_ASSIGN	142	1	1	100.00
CONT_ASSIGN	146	1	1	100.00
CONT_ASSIGN	150	1	1	100.00
CONT_ASSIGN	154	1	1	100.00
CONT_ASSIGN	157	1	1	100.00
CONT_ASSIGN	189	1	1	100.00
CONT_ASSIGN	191	1	1	100.00
CONT_ASSIGN	199	1	1	100.00
CONT_ASSIGN	207	1	1	100.00
CONT_ASSIGN	217	1	1	100.00
CONT_ASSIGN	226	1	1	100.00
CONT_ASSIGN	231	1	1	100.00
ALWAYS	235	3	3	100.00
CONT_ASSIGN	247	1	1	100.00
CONT_ASSIGN	248	1	1	100.00
CONT_ASSIGN	272	1	1	100.00
CONT_ASSIGN	273	1	1	100.00
CONT_ASSIGN	284	1	1	100.00
CONT_ASSIGN	289	1	1	100.00
CONT_ASSIGN	293	1	1	100.00
CONT_ASSIGN	294	1	1	100.00
CONT_ASSIGN	298	1	1	100.00
CONT_ASSIGN	299	1	1	100.00
CONT_ASSIGN	303	1	1	100.00
CONT_ASSIGN	304	1	1	100.00
ALWAYS	307	11	11	100.00
CONT_ASSIGN	351	1	1	100.00
CONT_ASSIGN	394	1	1	100.00
CONT_ASSIGN	471	1	1	100.00
CONT_ASSIGN	512	1	1	100.00
CONT_ASSIGN	518	1	1	100.00
CONT_ASSIGN	519	1	1	100.00
CONT_ASSIGN	520	1	1	100.00
CONT_ASSIGN	521	1	1	100.00
CONT_ASSIGN	522	1	1	100.00
CONT_ASSIGN	523	1	1	100.00
CONT_ASSIGN	534	1	1	100.00
CONT_ASSIGN	573	1	1	100.00

130                         logic unused_nonce;
131        1/1              assign unused_nonce = ^nonce_q[otp_ctrl_pkg::SramNonceWidth-1:NonceWidth];
           Tests:       T1 T2 T3 
132                       end
133                     
134                       //////////////////
135                       // Alert Sender //
136                       //////////////////
137                     
138                       logic alert_test;
139        1/1            assign alert_test = reg2hw.alert_test.q & reg2hw.alert_test.qe;
           Tests:       T1 T2 T3 
140                     
141                       assign hw2reg.status.bus_integ_error.d  = 1'b1;
142        1/1            assign hw2reg.status.bus_integ_error.de = |bus_integ_error;
           Tests:       T1 T2 T3 
143                     
144                       logic init_error;
145                       assign hw2reg.status.init_error.d  = 1'b1;
146        1/1            assign hw2reg.status.init_error.de = init_error;
           Tests:       T1 T2 T3 
147                     
148                       logic readback_error;
149                       assign hw2reg.status.readback_error.d  = 1'b1;
150        1/1            assign hw2reg.status.readback_error.de = readback_error;
           Tests:       T1 T2 T3 
151                     
152                       logic sram_alert;
153                       assign hw2reg.status.sram_alert.d  = 1'b1;
154        1/1            assign hw2reg.status.sram_alert.de = sram_alert;
           Tests:       T1 T2 T3 
155                     
156                       logic alert_req;
157        1/1            assign alert_req = (|bus_integ_error) | init_error | readback_error | sram_alert;
           Tests:       T1 T2 T3 
158                     
159                       prim_alert_sender #(
160                         .AsyncOn(AlertAsyncOn[0]),
161                         .IsFatal(1)
162                       ) u_prim_alert_sender_parity (
163                         .clk_i,
164                         .rst_ni,
165                         .alert_test_i  ( alert_test    ),
166                         .alert_req_i   ( alert_req     ),
167                         .alert_ack_o   (               ),
168                         .alert_state_o (               ),
169                         .alert_rx_i    ( alert_rx_i[0] ),
170                         .alert_tx_o    ( alert_tx_o[0] )
171                       );
172                     
173                       /////////////////////////
174                       // Escalation Triggers //
175                       /////////////////////////
176                     
177                       lc_tx_t [1:0] escalate_en;
178                       prim_lc_sync #(
179                         .NumCopies (2)
180                       ) u_prim_lc_sync (
181                         .clk_i,
182                         .rst_ni,
183                         .lc_en_i (lc_escalate_en_i),
184                         .lc_en_o (escalate_en)
185                       );
186                     
187                       // SEC_CM: KEY.GLOBAL_ESC
188                       logic escalate;
189        1/1            assign escalate = lc_tx_test_true_loose(escalate_en[0]);
           Tests:       T1 T2 T3 
190                       assign hw2reg.status.escalated.d  = 1'b1;
191        1/1            assign hw2reg.status.escalated.de = escalate;
           Tests:       T1 T2 T3 
192                     
193                       // SEC_CM: KEY.LOCAL_ESC
194                       // Aggregate external and internal escalation sources.
195                       // This is used in countermeasures further below (key reset and transaction blocking).
196                       logic local_esc, local_esc_reg;
197                       // This signal only aggregates registered escalation signals and is used for transaction
198                       // blocking further below, which is on a timing-critical path.
199        1/1            assign local_esc_reg = reg2hw.status.escalated.q  |
           Tests:       T1 T2 T3 
200                                              reg2hw.status.init_error.q |
201                                              reg2hw.status.bus_integ_error.q |
202                                              reg2hw.status.sram_alert.q |
203                                              reg2hw.status.readback_error.q;
204                       // This signal aggregates all escalation trigger signals, including the ones that are generated
205                       // in the same cycle such as init_error, sram alert, and bus_integ_error. It is used for
206                       // countermeasures that are not on the critical path (such as clearing the scrambling keys).
207        1/1            assign local_esc = escalate           |
           Tests:       T1 T2 T3 
208                                          init_error         |
209                                          (|bus_integ_error) |
210                                          sram_alert         |
211                                          readback_error     |
212                                          local_esc_reg;
213                     
214                       // Convert registered, local escalation sources to a multibit signal and combine this with
215                       // the incoming escalation enable signal before feeding into the TL-UL gate further below.
216                       lc_tx_t lc_tlul_gate_en;
217        1/1            assign lc_tlul_gate_en = lc_tx_inv(lc_tx_or_hi(escalate_en[1],
           Tests:       T1 T2 T3 
218                                                                      lc_tx_bool_to_lc_tx(local_esc_reg)));
219                       ///////////////////////
220                       // HW Initialization //
221                       ///////////////////////
222                     
223                       // A write to the init register reloads the LFSR seed, resets the init counter and
224                       // sets init_q to flag a pending initialization request.
225                       logic init_trig, init_q;
226        1/1            assign init_trig = reg2hw.ctrl.init.q &&
           Tests:       T1 T2 T3 
227                                          reg2hw.ctrl.init.qe &&
228                                          !init_q; // Ignore new requests while memory init is already pending.
229                     
230                       logic init_d, init_done;
231        1/1            assign init_d = (init_done) ? 1'b0 :
           Tests:       T1 T2 T3 
232                                       (init_trig) ? 1'b1 : init_q;
233                     
234                       always_ff @(posedge clk_i or negedge rst_ni) begin : p_init_reg
235        1/1              if(!rst_ni) begin
           Tests:       T1 T2 T3 
236        1/1                init_q <= 1'b0;
           Tests:       T1 T2 T3 
237                         end else begin
238        1/1                init_q <= init_d;
           Tests:       T1 T2 T3 
239                         end
240                       end
241                     
242                       // This waits until the scrambling keys are actually valid (this allows the SW to trigger
243                       // key renewal and initialization at the same time).
244                       logic init_req;
245                       logic [AddrWidth-1:0] init_cnt;
246                       logic key_req_pending_d, key_req_pending_q;
247        1/1            assign init_req  = init_q & ~key_req_pending_q;
           Tests:       T1 T2 T3 
248        1/1            assign init_done = (init_cnt == AddrWidth'(Depth - 1)) & init_req;
           Tests:       T1 T2 T3 
249                     
250                       // We employ two redundant counters to guard against FI attacks.
251                       // If any of the two is glitched and the two counter states do not agree,
252                       // we trigger an alert.
253                       // SEC_CM: INIT.CTR.REDUN
254                       prim_count #(
255                         .Width(AddrWidth)
256                       ) u_prim_count (
257                         .clk_i,
258                         .rst_ni,
259                         .clr_i(init_trig),
260                         .set_i(1'b0),
261                         .set_cnt_i('0),
262                         .incr_en_i(init_req),
263                         .decr_en_i(1'b0),
264                         .step_i(AddrWidth'(1)),
265                         .commit_i(1'b1),
266                         .cnt_o(init_cnt),
267                         .cnt_after_commit_o(),
268                         .err_o(init_error)
269                       );
270                     
271                       // Clear this bit on local escalation.
272        1/1            assign hw2reg.status.init_done.d  = init_done & ~init_trig & ~local_esc;
           Tests:       T1 T2 T3 
273        1/1            assign hw2reg.status.init_done.de = init_done | init_trig | local_esc;
           Tests:       T1 T2 T3 
274                     
275                       ////////////////////////////
276                       // Scrambling Key Request //
277                       ////////////////////////////
278                     
279                       // The scrambling key and nonce have to be requested from the OTP controller via a req/ack
280                       // protocol. Since the OTP controller works in a different clock domain, we have to synchronize
281                       // the req/ack protocol as described in more details here:
282                       // https://docs.opentitan.org/hw/ip/otp_ctrl/doc/index.html#interfaces-to-sram-and-otbn-scramblers
283                       logic key_req, key_ack;
284        1/1            assign key_req = reg2hw.ctrl.renew_scr_key.q &&
           Tests:       T1 T2 T3 
285                                        reg2hw.ctrl.renew_scr_key.qe &&
286                                        !key_req_pending_q && // Ignore new requests while a request is already pending.
287                                        !init_q; // Ignore new requests while memory init is already pending.
288                     
289        1/1            assign key_req_pending_d = (key_req) ? 1'b1 :
           Tests:       T1 T2 T3 
290                                                  (key_ack) ? 1'b0 : key_req_pending_q;
291                     
292                       // Clear this bit on local escalation.
293        1/1            assign hw2reg.status.scr_key_valid.d   = key_ack & ~key_req & ~local_esc;
           Tests:       T1 T2 T3 
294        1/1            assign hw2reg.status.scr_key_valid.de  = key_req | key_ack | local_esc;
           Tests:       T1 T2 T3 
295                     
296                       // As opposed to scr_key_valid, SW is responsible for clearing this register.
297                       // It is not automatically cleared by HW, except when escalating.
298        1/1            assign hw2reg.scr_key_rotated.d  = (key_ack & ~local_esc) ? MuBi4True : MuBi4False;
           Tests:       T1 T2 T3 
299        1/1            assign hw2reg.scr_key_rotated.de = key_ack | local_esc;
           Tests:       T1 T2 T3 
300                     
301                       // Clear this bit on local escalation.
302                       logic key_seed_valid;
303        1/1            assign hw2reg.status.scr_key_seed_valid.d  = key_seed_valid & ~local_esc;
           Tests:       T1 T2 T3 
304        1/1            assign hw2reg.status.scr_key_seed_valid.de = key_ack | local_esc;
           Tests:       T1 T2 T3 
305                     
306                       always_ff @(posedge clk_i or negedge rst_ni) begin : p_regs
307        1/1              if (!rst_ni) begin
           Tests:       T1 T2 T3 
308        1/1                key_req_pending_q <= 1'b0;
           Tests:       T1 T2 T3 
309                           // reset case does not use buffered values as the
310                           // reset value will be directly encoded into flop types
311        1/1                key_q             <= RndCnstSramKey;
           Tests:       T1 T2 T3 
312        1/1                nonce_q           <= RndCnstSramNonce;
           Tests:       T1 T2 T3 
313                         end else begin
314        1/1                key_req_pending_q <= key_req_pending_d;
           Tests:       T1 T2 T3 
315        1/1                if (key_ack) begin
           Tests:       T1 T2 T3 
316        1/1                  key_q   <= key_d;
           Tests:       T1 T2 T3 
317        1/1                  nonce_q <= nonce_d;
           Tests:       T1 T2 T3 
318                           end
                        MISSING_ELSE
319                           // This scraps the keys.
320                           // SEC_CM: KEY.GLOBAL_ESC
321                           // SEC_CM: KEY.LOCAL_ESC
322        1/1                if (local_esc) begin
           Tests:       T1 T2 T3 
323        1/1                  key_q   <= cnst_sram_key;
           Tests:       T4 T5 T6 
324        1/1                  nonce_q <= cnst_sram_nonce;
           Tests:       T4 T5 T6 
325                           end
                        MISSING_ELSE
326                         end
327                       end
328                     
329                       prim_sync_reqack_data #(
330                         .Width($bits(otp_ctrl_pkg::sram_otp_key_rsp_t)-1),
331                         .DataSrc2Dst(1'b0)
332                       ) u_prim_sync_reqack_data (
333                         .clk_src_i  ( clk_i              ),
334                         .rst_src_ni ( rst_ni             ),
335                         .clk_dst_i  ( clk_otp_i          ),
336                         .rst_dst_ni ( rst_otp_ni         ),
337                         .req_chk_i  ( 1'b1               ),
338                         .src_req_i  ( key_req_pending_q  ),
339                         .src_ack_o  ( key_ack            ),
340                         .dst_req_o  ( sram_otp_key_o.req ),
341                         .dst_ack_i  ( sram_otp_key_i.ack ),
342                         .data_i     ( {sram_otp_key_i.key,
343                                        sram_otp_key_i.nonce,
344                                        sram_otp_key_i.seed_valid} ),
345                         .data_o     ( {key_d,
346                                        nonce_d,
347                                        key_seed_valid} )
348                       );
349                     
350                       logic unused_csr_sigs;
351        1/1            assign unused_csr_sigs = ^{reg2hw.status.init_done.q,
           Tests:       T1 T2 T3 
352                                                  reg2hw.status.scr_key_seed_valid.q};
353                     
354                       ////////////////////
355                       // SRAM Execution //
356                       ////////////////////
357                     
358                       mubi4_t en_ifetch;
359                       if (InstrExec) begin : gen_instr_ctrl
360                         lc_tx_t lc_hw_debug_en;
361                         prim_lc_sync #(
362                           .NumCopies (1)
363                         ) u_prim_lc_sync_hw_debug_en (
364                           .clk_i,
365                           .rst_ni,
366                           .lc_en_i (lc_hw_debug_en_i),
367                           .lc_en_o ({lc_hw_debug_en})
368                         );
369                     
370                         mubi8_t otp_en_sram_ifetch;
371                         prim_mubi8_sync #(
372                           .NumCopies (1)
373                         ) u_prim_mubi8_sync_otp_en_sram_ifetch (
374                           .clk_i,
375                           .rst_ni,
376                           .mubi_i(otp_en_sram_ifetch_i),
377                           .mubi_o({otp_en_sram_ifetch})
378                         );
379                     
380                         mubi4_t lc_ifetch_en;
381                         mubi4_t reg_ifetch_en;
382                         // SEC_CM: INSTR.BUS.LC_GATED
383                         assign lc_ifetch_en = lc_to_mubi4(lc_hw_debug_en);
384                         // SEC_CM: EXEC.CONFIG.MUBI
385                         assign reg_ifetch_en = mubi4_t'(reg2hw.exec.q);
386                         // SEC_CM: EXEC.INTERSIG.MUBI
387                         assign en_ifetch = (mubi8_test_true_strict(otp_en_sram_ifetch)) ? reg_ifetch_en :
388                                                                                           lc_ifetch_en;
389                       end else begin : gen_tieoff
390                         assign en_ifetch = MuBi4False;
391                     
392                         // tie off unused signals
393                         logic unused_sigs;
394        1/1              assign unused_sigs = ^{lc_hw_debug_en_i,
           Tests:       T1 T2 T3 
395                                                reg2hw.exec.q,
396                                                otp_en_sram_ifetch_i};
397                       end
398                     
399                       /////////////////////////
400                       // Initialization LFSR //
401                       /////////////////////////
402                     
403                       logic [LfsrWidth-1:0] lfsr_out;
404                       prim_lfsr #(
405                         .LfsrDw      ( LfsrWidth       ),
406                         .EntropyDw   ( LfsrWidth       ),
407                         .StateOutDw  ( LfsrWidth       ),
408                         .DefaultSeed ( RndCnstLfsrSeed ),
409                         .StatePermEn ( 1'b1            ),
410                         .StatePerm   ( RndCnstLfsrPerm )
411                       ) u_lfsr (
412                         .clk_i,
413                         .rst_ni,
414                         .lfsr_en_i(init_req),
415                         .seed_en_i(init_trig),
416                         .seed_i(nonce_q[NonceWidth +: LfsrWidth]),
417                         .entropy_i('0),
418                         .state_o(lfsr_out)
419                       );
420                     
421                       // Compute the correct integrity alongside for the pseudo-random initialization values.
422                       logic [DataWidth - 1 :0] lfsr_out_integ;
423                       tlul_data_integ_enc u_tlul_data_integ_enc (
424                         .data_i(lfsr_out),
425                         .data_intg_o(lfsr_out_integ)
426                       );
427                     
428                       ////////////////////////////
429                       // SRAM TL-UL Access Gate //
430                       ////////////////////////////
431                     
432                       logic tl_gate_resp_pending;
433                       tlul_pkg::tl_h2d_t ram_tl_in_gated;
434                       tlul_pkg::tl_d2h_t ram_tl_out_gated;
435                     
436                       // SEC_CM: RAM_TL_LC_GATE.FSM.SPARSE
437                       tlul_lc_gate #(
438                         .NumGatesPerDirection(2)
439                       ) u_tlul_lc_gate (
440                         .clk_i,
441                         .rst_ni,
442                         .tl_h2d_i(ram_tl_i),
443                         .tl_d2h_o(ram_tl_o),
444                         .tl_h2d_o(ram_tl_in_gated),
445                         .tl_d2h_i(ram_tl_out_gated),
446                         .flush_req_i('0),
447                         .flush_ack_o(),
448                         .resp_pending_o(tl_gate_resp_pending),
449                         .lc_en_i (lc_tlul_gate_en),
450                         .err_o   (bus_integ_error[2])
451                       );
452                     
453                       /////////////////////////////////
454                       // SRAM with scrambling device //
455                       /////////////////////////////////
456                     
457                       logic tlul_req, tlul_gnt, tlul_we;
458                       logic [AddrWidth-1:0] tlul_addr;
459                       logic [DataWidth-1:0] tlul_wdata, tlul_wmask;
460                     
461                       logic sram_intg_error, sram_req, sram_gnt, sram_we, sram_rvalid;
462                       logic [AddrWidth-1:0] sram_addr;
463                       logic [DataWidth-1:0] sram_wdata, sram_wmask, sram_rdata;
464                       logic                 sram_wpending, sram_wr_collision;
465                     
466                       logic sram_compound_txn_in_progress;
467                     
468                     
469                       // // SEC_CM: MEM.READBACK
470                       mubi4_t reg_readback_en;
471        1/1            assign reg_readback_en = mubi4_t'(reg2hw.readback.q);
           Tests:       T1 T2 T3 
472                     
473                       tlul_adapter_sram #(
474                         .SramAw(AddrWidth),
475                         .SramDw(DataWidth - tlul_pkg::DataIntgWidth),
476                         .Outstanding(2),
477                         .ByteAccess(1),
478                         .CmdIntgCheck(1),
479                         .EnableRspIntgGen(1),
480                         .EnableDataIntgGen(0),
481                         .EnableDataIntgPt(1), // SEC_CM: MEM.INTEGRITY
482                         .SecFifoPtr      (1), // SEC_CM: TLUL_FIFO.CTR.REDUN
483                         .EnableReadback  (1)  // SEC_CM: MEM.READBACK
484                       ) u_tlul_adapter_sram (
485                         .clk_i,
486                         .rst_ni,
487                         .tl_i                       (ram_tl_in_gated),
488                         .tl_o                       (ram_tl_out_gated),
489                         .en_ifetch_i                (en_ifetch),
490                         .req_o                      (tlul_req),
491                         .req_type_o                 (),
492                         .gnt_i                      (tlul_gnt),
493                         .we_o                       (tlul_we),
494                         .addr_o                     (tlul_addr),
495                         .wdata_o                    (tlul_wdata),
496                         .wmask_o                    (tlul_wmask),
497                         // SEC_CM: BUS.INTEGRITY
498                         .intg_error_o               (bus_integ_error[1]),
499                         .rdata_i                    (sram_rdata),
500                         .rvalid_i                   (sram_rvalid),
501                         .rerror_i                   ('0),
502                         .compound_txn_in_progress_o (sram_compound_txn_in_progress),
503                         .readback_en_i              (reg_readback_en),
504                         .readback_error_o           (readback_error),
505                         .wr_collision_i             (sram_wr_collision),
506                         .write_pending_i            (sram_wpending)
507                       );
508                     
509                       logic key_valid;
510                     
511                       // Interposing mux logic for initialization with pseudo random data.
512        1/1            assign sram_req        = tlul_req | init_req;
           Tests:       T1 T2 T3 
513                       // This grant signal acts more like a ready internally in tlul_adapter_sram. In particular it's
514                       // fine to assert it when tlul_req is low (it has no effect). So here tlul_gnt is asserted when
515                       // a request from tlul_req will be granted regardless of whether a request exists. This is done
516                       // for timing reasons so that the output TL ready isn't combinatorially connected to the incoming
517                       // TL valid. In particular we must not use `sram_gnt` in the expression to avoid this.
518        1/1            assign tlul_gnt        = key_valid & ~init_req;
           Tests:       T1 T2 T3 
519        1/1            assign sram_we         = tlul_we | init_req;
           Tests:       T1 T2 T3 
520        1/1            assign sram_intg_error = |bus_integ_error[2:1] & ~init_req;
           Tests:       T1 T2 T3 
521        1/1            assign sram_addr       = (init_req) ? init_cnt          : tlul_addr;
           Tests:       T1 T2 T3 
522        1/1            assign sram_wdata      = (init_req) ? lfsr_out_integ    : tlul_wdata;
           Tests:       T1 T2 T3 
523        1/1            assign sram_wmask      = (init_req) ? {DataWidth{1'b1}} : tlul_wmask;
           Tests:       T1 T2 T3 
524                     
525                       // The SRAM scrambling wrapper will not accept any transactions while the
526                       // key req is pending or if we have escalated. Note that we're not using
527                       // the scr_key_valid CSR here, such that the SRAM can be used right after
528                       // reset, where the keys are reset to the default netlist constant.
529                       //
530                       // If we have escalated, but there is a pending request in the TL gate, we may have a pending
531                       // read-modify-write transaction or readback in the SRAM adapter. In that case we force key_valid
532                       // high to enable that to complete so it returns a response, the TL gate won't accept any new
533                       // transactions and the SRAM keys have been clobbered already.
534        1/1            assign key_valid =
           Tests:       T1 T2 T3 
535                         (key_req_pending_q)         ? 1'b0 :
536                         (reg2hw.status.escalated.q) ? (tl_gate_resp_pending & sram_compound_txn_in_progress) : 1'b1;
537                     
538                       // SEC_CM: MEM.SCRAMBLE, ADDR.SCRAMBLE
539                       prim_ram_1p_scr #(
540                         .Width(DataWidth),
541                         .Depth(Depth),
542                         .EnableParity(0),
543                         .DataBitsPerMask(DataWidth),
544                         .NumPrinceRoundsHalf(NumPrinceRoundsHalf)
545                       ) u_prim_ram_1p_scr (
546                         .clk_i,
547                         .rst_ni,
548                     
549                         .key_valid_i      (key_valid),
550                         .key_i            (key_q),
551                         .nonce_i          (nonce_q[NonceWidth-1:0]),
552                     
553                         .req_i            (sram_req),
554                         .intg_error_i     (sram_intg_error),
555                         .gnt_o            (sram_gnt),
556                         .write_i          (sram_we),
557                         .addr_i           (sram_addr),
558                         .wdata_i          (sram_wdata),
559                         .wmask_i          (sram_wmask),
560                         .rdata_o          (sram_rdata),
561                         .rvalid_o         (sram_rvalid),
562                         .rerror_o         ( ),
563                         .raddr_o          ( ),
564                         .cfg_i,
565                         .wr_collision_o   (sram_wr_collision),
566                         .write_pending_o  (sram_wpending),
567                         .alert_o          (sram_alert)
568                       );
569                     
570                       logic unused_sram_gnt;
571                       // Ignore sram_gnt signal to avoid creating a bad timing path, see comment on `tlul_gnt` above for
572                       // more details.
573        1/1            assign unused_sram_gnt = sram_gnt;
           Tests:       T1 T2 T3 

---

Cond Coverage for Instance : tb.dut

	Total	Covered	Percent
Conditions	99	88	88.89
Logical	99	88	88.89
Non-Logical	0	0
Event	0	0

 LINE       139
 EXPRESSION (reg2hw.alert_test.q & reg2hw.alert_test.qe)
             ---------1---------   ----------2---------

-1-	-2-	Status	Tests
0	1	Covered	T11,T13,T14
1	0	Covered	T1,T2,T3
1	1	Covered	T11,T13,T14

 LINE       157
 EXPRESSION (((|bus_integ_error)) | init_error | readback_error | sram_alert)
             ----------1---------   -----2----   -------3------   -----4----

-1-	-2-	-3-	-4-	Status	Tests
0	0	0	0	Covered	T1,T2,T3
0	0	0	1	Not Covered
0	0	1	0	Not Covered
0	1	0	0	Covered	T5,T15,T16
1	0	0	0	Covered	T5,T15,T16

 LINE       199
 EXPRESSION 
 Number  Term
      1  reg2hw.status.escalated.q | 
      2  reg2hw.status.init_error.q | 
      3  reg2hw.status.bus_integ_error.q | 
      4  reg2hw.status.sram_alert.q | 
      5  reg2hw.status.readback_error.q)

-1-	-2-	-3-	-4-	-5-	Status	Tests
0	0	0	0	0	Covered	T1,T2,T3
0	0	0	0	1	Not Covered
0	0	0	1	0	Not Covered
0	0	1	0	0	Covered	T5,T15,T16
0	1	0	0	0	Covered	T5,T15,T16
1	0	0	0	0	Covered	T4,T6,T7

 LINE       207
 EXPRESSION (escalate | init_error | ((|bus_integ_error)) | sram_alert | readback_error | local_esc_reg)
             ----1---   -----2----   ----------3---------   -----4----   -------5------   ------6------

-1-	-2-	-3-	-4-	-5-	-6-	Status	Tests
0	0	0	0	0	0	Covered	T1,T2,T3
0	0	0	0	0	1	Covered	T4,T5,T6
0	0	0	0	1	0	Not Covered
0	0	0	1	0	0	Not Covered
0	0	1	0	0	0	Covered	T5,T15,T16
0	1	0	0	0	0	Covered	T5,T15,T16
1	0	0	0	0	0	Covered	T4,T6,T7

 LINE       226
 EXPRESSION (reg2hw.ctrl.init.q && reg2hw.ctrl.init.qe && ((!init_q)))
             ---------1--------    ---------2---------    -----3-----

-1-	-2-	-3-	Status	Tests
0	1	1	Covered	T4,T6,T7
1	0	1	Covered	T1,T2,T3
1	1	0	Not Covered
1	1	1	Covered	T1,T2,T3

 LINE       231
 EXPRESSION (init_done ? 1'b0 : (init_trig ? 1'b1 : init_q))
             ----1----

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

 LINE       231
 SUB-EXPRESSION (init_trig ? 1'b1 : init_q)
                 ----1----

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

 LINE       247
 EXPRESSION (init_q & ((~key_req_pending_q)))
             ---1--   -----------2----------

-1-	-2-	Status	Tests
0	1	Covered	T1,T2,T3
1	0	Covered	T1,T2,T3
1	1	Covered	T1,T2,T3

 LINE       248
 EXPRESSION ((init_cnt == 10'((Depth - 1))) & init_req)
             ---------------1--------------   ----2---

-1-	-2-	Status	Tests
0	1	Covered	T1,T2,T3
1	0	Covered	T1,T2,T3
1	1	Covered	T1,T2,T3

 LINE       248
 SUB-EXPRESSION (init_cnt == 10'((Depth - 1)))
                ---------------1--------------

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

 LINE       272
 EXPRESSION (init_done & ((~init_trig)) & ((~local_esc)))
             ----1----   -------2------   -------3------

-1-	-2-	-3-	Status	Tests	Exclude Annotation
0	1	1	Covered	T1,T2,T3
1	0	1	Excluded		[LOWRISK] we don't issue a new init when there is a unfinished init
1	1	0	Covered	T4,T6,T7
1	1	1	Covered	T1,T2,T3

 LINE       273
 EXPRESSION (init_done | init_trig | local_esc)
             ----1----   ----2----   ----3----

-1-	-2-	-3-	Status	Tests
0	0	0	Covered	T1,T2,T3
0	0	1	Covered	T4,T5,T6
0	1	0	Covered	T1,T2,T3
1	0	0	Covered	T1,T2,T3

 LINE       284
 EXPRESSION (reg2hw.ctrl.renew_scr_key.q && reg2hw.ctrl.renew_scr_key.qe && ((!key_req_pending_q)) && ((!init_q)))
             -------------1-------------    --------------2-------------    -----------3----------    -----4-----

-1-	-2-	-3-	-4-	Status	Tests
0	1	1	1	Covered	T17,T18,T19
1	0	1	1	Covered	T1,T2,T3
1	1	0	1	Not Covered
1	1	1	0	Not Covered
1	1	1	1	Covered	T1,T2,T3

 LINE       289
 EXPRESSION (key_req ? 1'b1 : (key_ack ? 1'b0 : key_req_pending_q))
             ---1---

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

 LINE       289
 SUB-EXPRESSION (key_ack ? 1'b0 : key_req_pending_q)
                 ---1---

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

 LINE       293
 EXPRESSION (key_ack & ((~key_req)) & ((~local_esc)))
             ---1---   ------2-----   -------3------

-1-	-2-	-3-	Status	Tests	Exclude Annotation
0	1	1	Covered	T1,T2,T3
1	0	1	Excluded		[UNSUPPORTED] ACK can't come without REQ
1	1	0	Covered	T4,T6,T7
1	1	1	Covered	T1,T2,T3

 LINE       294
 EXPRESSION (key_req | key_ack | local_esc)
             ---1---   ---2---   ----3----

-1-	-2-	-3-	Status	Tests
0	0	0	Covered	T1,T2,T3
0	0	1	Covered	T4,T5,T6
0	1	0	Covered	T1,T2,T3
1	0	0	Covered	T1,T2,T3

 LINE       298
 EXPRESSION ((key_ack & ((~local_esc))) ? MuBi4True : MuBi4False)
             -------------1------------

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

 LINE       298
 SUB-EXPRESSION (key_ack & ((~local_esc)))
                 ---1---   -------2------

-1-	-2-	Status	Tests
0	1	Covered	T1,T2,T3
1	0	Covered	T4,T6,T7
1	1	Covered	T1,T2,T3

 LINE       299
 EXPRESSION (key_ack | local_esc)
             ---1---   ----2----

-1-	-2-	Status	Tests
0	0	Covered	T1,T2,T3
0	1	Covered	T4,T5,T6
1	0	Covered	T1,T2,T3

 LINE       303
 EXPRESSION (key_seed_valid & ((~local_esc)))
             -------1------   -------2------

-1-	-2-	Status	Tests
0	1	Covered	T1,T4,T8
1	0	Covered	T4,T6,T7
1	1	Covered	T2,T3,T4

 LINE       304
 EXPRESSION (key_ack | local_esc)
             ---1---   ----2----

-1-	-2-	Status	Tests
0	0	Covered	T1,T2,T3
0	1	Covered	T4,T5,T6
1	0	Covered	T1,T2,T3

 LINE       512
 EXPRESSION (tlul_req | init_req)
             ----1---   ----2---

-1-	-2-	Status	Tests
0	0	Covered	T1,T2,T3
0	1	Covered	T1,T2,T3
1	0	Covered	T2,T3,T4

 LINE       518
 EXPRESSION (key_valid & ((~init_req)))
             ----1----   ------2------

-1-	-2-	Status	Tests
0	1	Covered	T1,T2,T3
1	0	Covered	T1,T2,T3
1	1	Covered	T1,T2,T3

 LINE       519
 EXPRESSION (tlul_we | init_req)
             ---1---   ----2---

-1-	-2-	Status	Tests
0	0	Covered	T1,T2,T3
0	1	Covered	T1,T2,T3
1	0	Covered	T2,T3,T4

 LINE       520
 EXPRESSION (((|bus_integ_error[2:1])) & ((~init_req)))
             ------------1------------   ------2------

-1-	-2-	Status	Tests
0	1	Covered	T1,T2,T3
1	0	Not Covered
1	1	Covered	T5,T15,T16

 LINE       521
 EXPRESSION (init_req ? init_cnt : tlul_addr)
             ----1---

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

 LINE       522
 EXPRESSION (init_req ? lfsr_out_integ : tlul_wdata)
             ----1---

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

 LINE       523
 EXPRESSION (init_req ? ({sram_ctrl_pkg::DataWidth {1'b1}}) : tlul_wmask)
             ----1---

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

 LINE       534
 EXPRESSION (key_req_pending_q ? 1'b0 : (reg2hw.status.escalated.q ? (tl_gate_resp_pending & sram_compound_txn_in_progress) : 1'b1))
             --------1--------

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

 LINE       534
 SUB-EXPRESSION (reg2hw.status.escalated.q ? (tl_gate_resp_pending & sram_compound_txn_in_progress) : 1'b1)
                 ------------1------------

-1-	Status	Tests
0	Covered	T1,T2,T3
1	Covered	T4,T6,T7

 LINE       534
 SUB-EXPRESSION (tl_gate_resp_pending & sram_compound_txn_in_progress)
                 ----------1---------   --------------2--------------

-1-	-2-	Status	Tests
0	1	Not Covered
1	0	Covered	T4,T6,T7
1	1	Covered	T6,T7,T20

---

Toggle Coverage for Instance : tb.dut

	Total	Covered	Percent
Totals	62	62	100.00
Total Bits	1230	1230	100.00
Total Bits 0->1	615	615	100.00
Total Bits 1->0	615	615	100.00

Ports	62	62	100.00
Port Bits	1230	1230	100.00
Port Bits 0->1	615	615	100.00
Port Bits 1->0	615	615	100.00

Port Details

Name	Toggle	Toggle 1->0	Tests	Toggle 0->1	Tests	Direction
clk_i	Yes	Yes	T1,T2,T3	Yes	T1,T2,T3	INPUT
rst_ni	Yes	Yes	T4,T5,T6	Yes	T1,T2,T3	INPUT
clk_otp_i	Yes	Yes	T1,T2,T3	Yes	T1,T2,T3	INPUT
rst_otp_ni	Yes	Yes	T4,T5,T6	Yes	T1,T2,T3	INPUT
ram_tl_i.d_ready	Yes	Yes	T1,T2,T4	Yes	T1,T2,T3	INPUT
ram_tl_i.a_user.data_intg[6:0]	Yes	Yes	T2,T3,T4	Yes	T2,T3,T4	INPUT
ram_tl_i.a_user.cmd_intg[6:0]	Yes	Yes	T2,T3,T4	Yes	T2,T3,T4	INPUT
ram_tl_i.a_user.instr_type[3:0]	Yes	Yes	T4,T10,T21	Yes	T4,T10,T21	INPUT
ram_tl_i.a_user.rsvd[4:0]	Unreachable	Unreachable		Unreachable		INPUT
ram_tl_i.a_data[31:0]	Yes	Yes	T2,T3,T4	Yes	T2,T3,T4	INPUT
ram_tl_i.a_mask[3:0]	Yes	Yes	T2,T3,T4	Yes	T2,T3,T4	INPUT
ram_tl_i.a_address[31:0]	Yes	Yes	T2,T3,T4	Yes	T2,T3,T4	INPUT
ram_tl_i.a_source[7:0]	Yes	Yes	T2,T3,T4	Yes	T2,T3,T4	INPUT
ram_tl_i.a_size[1:0]	Yes	Yes	T2,T3,T4	Yes	T2,T3,T4	INPUT
ram_tl_i.a_param[2:0]	Unreachable	Unreachable		Unreachable		INPUT
ram_tl_i.a_opcode[2:0]	Yes	Yes	T2,T3,T4	Yes	T2,T3,T4	INPUT
ram_tl_i.a_valid	Yes	Yes	T2,T3,T4	Yes	T2,T3,T4	INPUT
ram_tl_o.a_ready	Yes	Yes	T1,T2,T3	Yes	T1,T2,T3	OUTPUT
ram_tl_o.d_error	Yes	Yes	T1,T2,T3	Yes	T4,T5,T6	OUTPUT
ram_tl_o.d_user.data_intg[6:0]	Yes	Yes	T2,T3,T4	Yes	T2,T3,T4	OUTPUT
ram_tl_o.d_user.rsp_intg[5:0]	Yes	Yes	T2,T3,T4	Yes	T1,T2,T3	OUTPUT
ram_tl_o.d_user.rsp_intg[6]	Unreachable	Unreachable		Unreachable		OUTPUT
ram_tl_o.d_data[31:0]	Yes	Yes	T2,T3,T4	Yes	T2,T3,T4	OUTPUT
ram_tl_o.d_sink	Unreachable	Unreachable		Unreachable		OUTPUT
ram_tl_o.d_source[7:0]	Yes	Yes	T2,T3,T4	Yes	T2,T3,T4	OUTPUT
ram_tl_o.d_size[1:0]	Yes	Yes	T2,T3,T4	Yes	T2,T3,T4	OUTPUT
ram_tl_o.d_param[2:0]	Unreachable	Unreachable		Unreachable		OUTPUT
ram_tl_o.d_opcode[0]	Yes	Yes	*T2,*T3,*T4	Yes	T2,T3,T4	OUTPUT
ram_tl_o.d_opcode[2:1]	Unreachable	Unreachable		Unreachable		OUTPUT
ram_tl_o.d_valid	Yes	Yes	T2,T3,T4	Yes	T2,T3,T4	OUTPUT
regs_tl_i.d_ready	Yes	Yes	T1,T2,T4	Yes	T1,T2,T3	INPUT
regs_tl_i.a_user.data_intg[6:0]	Yes	Yes	T2,T4,T8	Yes	T4,T8,T11	INPUT
regs_tl_i.a_user.cmd_intg[6:0]	Yes	Yes	T2,T4,T8	Yes	T2,T4,T8	INPUT
regs_tl_i.a_user.instr_type[3:0]	Yes	Yes	T2,T8,T11	Yes	T2,T8,T11	INPUT
regs_tl_i.a_user.rsvd[4:0]	Unreachable	Unreachable		Unreachable		INPUT
regs_tl_i.a_data[31:0]	Yes	Yes	T4,T8,T10	Yes	T2,T4,T8	INPUT
regs_tl_i.a_mask[3:0]	Yes	Yes	T4,T8,T11	Yes	T2,T4,T11	INPUT
regs_tl_i.a_address[31:0]	Yes	Yes	T2,T4,T11	Yes	T2,T4,T11	INPUT
regs_tl_i.a_source[7:0]	Yes	Yes	T4,T8,T10	Yes	T4,T8,T11	INPUT
regs_tl_i.a_size[1:0]	Yes	Yes	T2,T4,T8	Yes	T2,T4,T8	INPUT
regs_tl_i.a_param[2:0]	Unreachable	Unreachable		Unreachable		INPUT
regs_tl_i.a_opcode[2:0]	Yes	Yes	T2,T4,T8	Yes	T2,T3,T4	INPUT
regs_tl_i.a_valid	Yes	Yes	T1,T2,T3	Yes	T1,T2,T3	INPUT
regs_tl_o.a_ready	Yes	Yes	T1,T2,T3	Yes	T1,T2,T3	OUTPUT
regs_tl_o.d_error	Yes	Yes	T22,T23,T24	Yes	T22,T23,T24	OUTPUT
regs_tl_o.d_user.data_intg[6:0]	Yes	Yes	T4,T5,T6	Yes	T4,T5,T6	OUTPUT
regs_tl_o.d_user.rsp_intg[5:0]	Yes	Yes	*T4,*T10,*T11	Yes	T2,T3,T4	OUTPUT
regs_tl_o.d_user.rsp_intg[6]	Unreachable	Unreachable		Unreachable		OUTPUT
regs_tl_o.d_data[31:0]	Yes	Yes	T4,T5,T6	Yes	T1,T2,T3	OUTPUT
regs_tl_o.d_sink	Unreachable	Unreachable		Unreachable		OUTPUT
regs_tl_o.d_source[7:0]	Yes	Yes	T4,T10,T11	Yes	T3,T4,T8	OUTPUT
regs_tl_o.d_size[1:0]	Yes	Yes	T4,T10,T9	Yes	T2,T4,T8	OUTPUT
regs_tl_o.d_param[2:0]	Unreachable	Unreachable		Unreachable		OUTPUT
regs_tl_o.d_opcode[0]	Yes	Yes	*T4,*T5,*T6	Yes	T4,T5,T6	OUTPUT
regs_tl_o.d_opcode[2:1]	Unreachable	Unreachable		Unreachable		OUTPUT
regs_tl_o.d_valid	Yes	Yes	T1,T2,T3	Yes	T1,T2,T3	OUTPUT
alert_rx_i[0].ack_n	Yes	Yes	T1,T2,T3	Yes	T1,T2,T3	INPUT
alert_rx_i[0].ack_p	Yes	Yes	T11,T5,T13	Yes	T11,T5,T13	INPUT
alert_rx_i[0].ping_n	Unreachable	Unreachable		Unreachable		INPUT
alert_rx_i[0].ping_p	Unreachable	Unreachable		Unreachable		INPUT
alert_tx_o[0].alert_n	Yes	Yes	T1,T2,T3	Yes	T1,T2,T3	OUTPUT
alert_tx_o[0].alert_p	Yes	Yes	T11,T5,T13	Yes	T11,T5,T13	OUTPUT
lc_escalate_en_i[3:0]	Yes	Yes	T4,T6,T7	Yes	T4,T6,T7	INPUT
lc_hw_debug_en_i[3:0]	Yes	Yes	T22,T23,T24	Yes	T22,T23,T24	INPUT
otp_en_sram_ifetch_i[7:0]	Yes	Yes	T22,T23,T24	Yes	T22,T23,T24	INPUT
sram_otp_key_o.req	Yes	Yes	T1,T2,T3	Yes	T1,T2,T3	OUTPUT
sram_otp_key_i.seed_valid	Yes	Yes	T4,T21,T6	Yes	T4,T6,T7	INPUT
sram_otp_key_i.nonce[127:0]	Yes	Yes	T4,T9,T21	Yes	T3,T4,T6	INPUT
sram_otp_key_i.key[127:0]	Yes	Yes	T4,T21,T6	Yes	T3,T4,T9	INPUT
sram_otp_key_i.ack	Yes	Yes	T1,T2,T3	Yes	T1,T2,T3	INPUT
cfg_i.rf_cfg.cfg[3:0]	Yes	Yes	T1,T12,T25	Yes	T1,T12,T25	INPUT
cfg_i.rf_cfg.cfg_en	Yes	Yes	T1,T12,T25	Yes	T1,T12,T25	INPUT
cfg_i.rf_cfg.test	Yes	Yes	T1,T12,T25	Yes	T1,T12,T25	INPUT
cfg_i.ram_cfg.cfg[3:0]	Yes	Yes	T1,T12,T25	Yes	T1,T12,T25	INPUT
cfg_i.ram_cfg.cfg_en	Yes	Yes	T1,T12,T25	Yes	T1,T12,T25	INPUT
cfg_i.ram_cfg.test	Yes	Yes	T1,T12,T25	Yes	T1,T12,T25	INPUT

*Tests covering at least one bit in the range

---

Branch Coverage for Instance : tb.dut

	Line No.	Total	Covered	Percent
Branches		24	24	100.00
TERNARY	231	3	3	100.00
TERNARY	289	3	3	100.00
TERNARY	298	2	2	100.00
TERNARY	521	2	2	100.00
TERNARY	522	2	2	100.00
TERNARY	523	2	2	100.00
TERNARY	534	3	3	100.00
IF	235	2	2	100.00
IF	307	5	5	100.00

231          assign init_d = (init_done) ? 1'b0 :
                                         -1-  
                                         ==>  
232                          (init_trig) ? 1'b1 : init_q;
                                         -2-  
                                         ==>  
                                         ==>  

Branches:

-1-	-2-	Status	Tests
1	-	Covered	T1,T2,T3
0	1	Covered	T1,T2,T3
0	0	Covered	T1,T2,T3

289          assign key_req_pending_d = (key_req) ? 1'b1 :
                                                  -1-  
                                                  ==>  
290                                     (key_ack) ? 1'b0 : key_req_pending_q;
                                                  -2-  
                                                  ==>  
                                                  ==>  

Branches:

-1-	-2-	Status	Tests
1	-	Covered	T1,T2,T3
0	1	Covered	T1,T2,T3
0	0	Covered	T1,T2,T3

298          assign hw2reg.scr_key_rotated.d  = (key_ack & ~local_esc) ? MuBi4True : MuBi4False;
                                                                       -1-  
                                                                       ==>  
                                                                       ==>  

Branches:

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

521          assign sram_addr       = (init_req) ? init_cnt          : tlul_addr;
                                                 -1-  
                                                 ==>  
                                                 ==>  

Branches:

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

522          assign sram_wdata      = (init_req) ? lfsr_out_integ    : tlul_wdata;
                                                 -1-  
                                                 ==>  
                                                 ==>  

Branches:

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

523          assign sram_wmask      = (init_req) ? {DataWidth{1'b1}} : tlul_wmask;
                                                 -1-  
                                                 ==>  
                                                 ==>  

Branches:

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

534          assign key_valid =
                               
535            (key_req_pending_q)         ? 1'b0 :
                                           -1-  
                                           ==>  
536            (reg2hw.status.escalated.q) ? (tl_gate_resp_pending & sram_compound_txn_in_progress) : 1'b1;
                                           -2-  
                                           ==>  
                                           ==>  

Branches:

-1-	-2-	Status	Tests
1	-	Covered	T1,T2,T3
0	1	Covered	T4,T6,T7
0	0	Covered	T1,T2,T3

235            if(!rst_ni) begin
               -1-  
236              init_q <= 1'b0;
                 ==>
237            end else begin
238              init_q <= init_d;
                 ==>

Branches:

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

307            if (!rst_ni) begin
               -1-  
308              key_req_pending_q <= 1'b0;
                 ==>
309              // reset case does not use buffered values as the
310              // reset value will be directly encoded into flop types
311              key_q             <= RndCnstSramKey;
312              nonce_q           <= RndCnstSramNonce;
313            end else begin
314              key_req_pending_q <= key_req_pending_d;
315              if (key_ack) begin
                 -2-  
316                key_q   <= key_d;
                   ==>
317                nonce_q <= nonce_d;
318              end
                 MISSING_ELSE
                 ==>
319              // This scraps the keys.
320              // SEC_CM: KEY.GLOBAL_ESC
321              // SEC_CM: KEY.LOCAL_ESC
322              if (local_esc) begin
                 -3-  
323                key_q   <= cnst_sram_key;
                   ==>
324                nonce_q <= cnst_sram_nonce;
325              end
                 MISSING_ELSE
                 ==>

Branches:

-1-	-2-	-3-	Status	Tests
1	-	-	Covered	T1,T2,T3
0	1	-	Covered	T1,T2,T3
0	0	-	Covered	T1,T2,T3
0	-	1	Covered	T4,T5,T6
0	-	0	Covered	T1,T2,T3

---

Assert Coverage for Instance : tb.dut

	Total	Attempted	Percent	Succeeded/Matched	Percent
Assertions	17	17	100.00	12	70.59
Cover properties	0	0		0
Cover sequences	0	0		0
Total	17	17	100.00	12	70.59

---

Assertion Details

Name	Attempts	Real Successes	Failures	Incomplete
AlertOutKnown_A	322406092	322303845	0	0
FpvSecCmCntCheck_A	322406092	70	0	0
FpvSecCmLcGateFsmCheck_A	322406092	0	0	0
FpvSecCmRegWeOnehotCheck_A	322406092	70	0	0
FpvSecCmReqFifoRptrCheck_A	322406092	0	0	0
FpvSecCmReqFifoWptrCheck_A	322406092	0	0	0
FpvSecCmRspFifoRptrCheck_A	322406092	70	0	0
FpvSecCmRspFifoWptrCheck_A	322406092	70	0	0
FpvSecCmSramReqFifoRptrCheck_A	322406092	0	0	0
FpvSecCmSramReqFifoWptrCheck_A	322406092	0	0	0
NonceWidthsLessThanSource_A	893	893	0	0
RamTlOutKnown_A	322406092	322303845	0	0
RamTlOutPayLoadKnown_A	322406092	133031396	0	0
RamTlOutPayLoadKnown_AKnownEnable	322406092	322303845	0	0
RegsTlOutKnown_A	322406092	322303845	0	0
SramOtpKeyKnown_A	322406092	322303845	0	0
TlulGntIsCorrect_A	322406092	65737425	0	0

AlertOutKnown_A

Name	Attempts	Real Successes	Failures	Incomplete
Total	322406092	322303845	0	0
T1	1623	1567	0	0
T2	9045	8990	0	0
T3	4225	4148	0	0
T4	32061	31902	0	0
T5	11232	8552	0	0
T8	18819	18746	0	0
T9	5321	5243	0	0
T10	28255	28199	0	0
T11	1354	1292	0	0
T12	2447	2383	0	0

FpvSecCmCntCheck_A

Name	Attempts	Real Successes	Failures	Incomplete
Total	322406092	70	0	0
T5	11232	10	0	0
T6	28229	0	0	0
T13	1154	0	0	0
T14	723	0	0	0
T15	16365	20	0	0
T16	0	20	0	0
T21	6692	0	0	0
T25	1986	0	0	0
T26	0	10	0	0
T27	0	10	0	0
T28	33450	0	0	0
T29	4213	0	0	0
T30	27749	0	0	0

FpvSecCmLcGateFsmCheck_A

Name	Attempts	Real Successes	Failures	Incomplete
Total	322406092	0	0	0

FpvSecCmRegWeOnehotCheck_A

Name	Attempts	Real Successes	Failures	Incomplete
Total	322406092	70	0	0
T5	11232	10	0	0
T6	28229	0	0	0
T13	1154	0	0	0
T14	723	0	0	0
T15	16365	20	0	0
T16	0	20	0	0
T21	6692	0	0	0
T25	1986	0	0	0
T26	0	10	0	0
T27	0	10	0	0
T28	33450	0	0	0
T29	4213	0	0	0
T30	27749	0	0	0

FpvSecCmReqFifoRptrCheck_A

Name	Attempts	Real Successes	Failures	Incomplete
Total	322406092	0	0	0

FpvSecCmReqFifoWptrCheck_A

Name	Attempts	Real Successes	Failures	Incomplete
Total	322406092	0	0	0

FpvSecCmRspFifoRptrCheck_A

Name	Attempts	Real Successes	Failures	Incomplete
Total	322406092	70	0	0
T5	11232	10	0	0
T6	28229	0	0	0
T13	1154	0	0	0
T14	723	0	0	0
T15	16365	20	0	0
T16	0	20	0	0
T21	6692	0	0	0
T25	1986	0	0	0
T26	0	10	0	0
T27	0	10	0	0
T28	33450	0	0	0
T29	4213	0	0	0
T30	27749	0	0	0

FpvSecCmRspFifoWptrCheck_A

Name	Attempts	Real Successes	Failures	Incomplete
Total	322406092	70	0	0
T5	11232	10	0	0
T6	28229	0	0	0
T13	1154	0	0	0
T14	723	0	0	0
T15	16365	20	0	0
T16	0	20	0	0
T21	6692	0	0	0
T25	1986	0	0	0
T26	0	10	0	0
T27	0	10	0	0
T28	33450	0	0	0
T29	4213	0	0	0
T30	27749	0	0	0

FpvSecCmSramReqFifoRptrCheck_A

Name	Attempts	Real Successes	Failures	Incomplete
Total	322406092	0	0	0

FpvSecCmSramReqFifoWptrCheck_A

Name	Attempts	Real Successes	Failures	Incomplete
Total	322406092	0	0	0

NonceWidthsLessThanSource_A

Name	Attempts	Real Successes	Failures	Incomplete
Total	893	893	0	0
T1	1	1	0	0
T2	1	1	0	0
T3	1	1	0	0
T4	1	1	0	0
T5	1	1	0	0
T8	1	1	0	0
T9	1	1	0	0
T10	1	1	0	0
T11	1	1	0	0
T12	1	1	0	0

RamTlOutKnown_A

Name	Attempts	Real Successes	Failures	Incomplete
Total	322406092	322303845	0	0
T1	1623	1567	0	0
T2	9045	8990	0	0
T3	4225	4148	0	0
T4	32061	31902	0	0
T5	11232	8552	0	0
T8	18819	18746	0	0
T9	5321	5243	0	0
T10	28255	28199	0	0
T11	1354	1292	0	0
T12	2447	2383	0	0

RamTlOutPayLoadKnown_A

Name	Attempts	Real Successes	Failures	Incomplete
Total	322406092	133031396	0	0
T2	9045	2704	0	0
T3	4225	765	0	0
T4	32061	2271	0	0
T5	11232	527	0	0
T6	0	2776	0	0
T8	18819	8581	0	0
T9	5321	2379	0	0
T10	28255	9099	0	0
T11	1354	0	0	0
T12	2447	0	0	0
T21	6692	3253	0	0
T28	0	13703	0	0

RamTlOutPayLoadKnown_AKnownEnable

Name	Attempts	Real Successes	Failures	Incomplete
Total	322406092	322303845	0	0
T1	1623	1567	0	0
T2	9045	8990	0	0
T3	4225	4148	0	0
T4	32061	31902	0	0
T5	11232	8552	0	0
T8	18819	18746	0	0
T9	5321	5243	0	0
T10	28255	28199	0	0
T11	1354	1292	0	0
T12	2447	2383	0	0

RegsTlOutKnown_A

Name	Attempts	Real Successes	Failures	Incomplete
Total	322406092	322303845	0	0
T1	1623	1567	0	0
T2	9045	8990	0	0
T3	4225	4148	0	0
T4	32061	31902	0	0
T5	11232	8552	0	0
T8	18819	18746	0	0
T9	5321	5243	0	0
T10	28255	28199	0	0
T11	1354	1292	0	0
T12	2447	2383	0	0

SramOtpKeyKnown_A

Name	Attempts	Real Successes	Failures	Incomplete
Total	322406092	322303845	0	0
T1	1623	1567	0	0
T2	9045	8990	0	0
T3	4225	4148	0	0
T4	32061	31902	0	0
T5	11232	8552	0	0
T8	18819	18746	0	0
T9	5321	5243	0	0
T10	28255	28199	0	0
T11	1354	1292	0	0
T12	2447	2383	0	0

TlulGntIsCorrect_A

Name	Attempts	Real Successes	Failures	Incomplete
Total	322406092	65737425	0	0
T2	9045	637	0	0
T3	4225	833	0	0
T4	32061	659	0	0
T5	11232	0	0	0
T6	0	811	0	0
T8	18819	4680	0	0
T9	5321	2379	0	0
T10	28255	4868	0	0
T11	1354	0	0	0
T12	2447	0	0	0
T21	6692	3545	0	0
T28	0	5410	0	0
T29	0	1547	0	0