Module Definition
dashboard | hierarchy | modlist | groups | tests | asserts



Module Instance : tb.dut.u_reseed_ctrl.u_edn_req.u_prim_sync_reqack_data.u_prim_sync_reqack

Instance :
SCORELINECONDTOGGLEFSMBRANCHASSERT
95.83 100.00 83.33 100.00 100.00


Instance's subtree :
SCORELINECONDTOGGLEFSMBRANCHASSERT
95.83 100.00 83.33 100.00 100.00


Parent :
SCORELINECONDTOGGLEFSMBRANCHASSERTNAME
100.00 100.00 100.00 u_prim_sync_reqack_data


Subtrees :
NAMESCORELINECONDTOGGLEFSMBRANCHASSERT
gen_nrz_hs_protocol.ack_sync 100.00 100.00 100.00
gen_nrz_hs_protocol.req_sync 100.00 100.00 100.00


Since this is the module's only instance, the coverage report is the same as for the module.
Line Coverage for Module : prim_sync_reqack
Line No.TotalCoveredPercent
TOTAL3636100.00
CONT_ASSIGN5500
CONT_ASSIGN19411100.00
CONT_ASSIGN19511100.00
ALWAYS2191212100.00
ALWAYS2631212100.00
ALWAYS30755100.00
ALWAYS31655100.00
CONT_ASSIGN33500
ALWAYS33900

54 logic unused_req_chk; 55 unreachable assign unused_req_chk = req_chk_i; 56 57 if (EnRzHs) begin : gen_rz_hs_protocol 58 ////////////////// 59 // RZ protocol // 60 ////////////////// 61 62 // Types 63 typedef enum logic { 64 LoSt, HiSt 65 } rz_fsm_e; 66 67 // Signals 68 rz_fsm_e src_fsm_d, src_fsm_q; 69 rz_fsm_e dst_fsm_d, dst_fsm_q; 70 logic src_ack, dst_ack; 71 logic src_req, dst_req; 72 73 // REQ-side FSM (SRC domain) 74 always_comb begin : src_fsm 75 src_fsm_d = src_fsm_q; 76 src_ack_o = 1'b0; 77 src_req = 1'b0; 78 79 unique case (src_fsm_q) 80 LoSt: begin 81 // Wait for the ack to go back to zero before starting 82 // a new transaction. 83 if (!src_ack && src_req_i) begin 84 src_fsm_d = HiSt; 85 end 86 end 87 HiSt: begin 88 src_req = 1'b1; 89 // Forward the acknowledgement. 90 src_ack_o = src_ack; 91 // If request drops out, we go back to LoSt. 92 // If DST side asserts ack, we also go back to LoSt. 93 if (!src_req_i || src_ack) begin 94 src_fsm_d = LoSt; 95 end 96 end 97 //VCS coverage off 98 // pragma coverage off 99 default: ; 100 //VCS coverage on 101 // pragma coverage on 102 endcase 103 end 104 105 // Move ACK over to SRC domain. 106 prim_flop_2sync #( 107 .Width(1) 108 ) ack_sync ( 109 .clk_i (clk_src_i), 110 .rst_ni (rst_src_ni), 111 .d_i (dst_ack), 112 .q_o (src_ack) 113 ); 114 115 // Registers 116 always_ff @(posedge clk_src_i or negedge rst_src_ni) begin 117 if (!rst_src_ni) begin 118 src_fsm_q <= LoSt; 119 end else begin 120 src_fsm_q <= src_fsm_d; 121 end 122 end 123 124 // ACK-side FSM (DST domain) 125 always_comb begin : dst_fsm 126 dst_fsm_d = dst_fsm_q; 127 dst_req_o = 1'b0; 128 dst_ack = 1'b0; 129 130 unique case (dst_fsm_q) 131 LoSt: begin 132 if (dst_req) begin 133 // Forward the request. 134 dst_req_o = 1'b1; 135 // Wait for the request and acknowledge to be asserted 136 // before responding to the SRC side. 137 if (dst_ack_i) begin 138 dst_fsm_d = HiSt; 139 end 140 end 141 end 142 HiSt: begin 143 dst_ack = 1'b1; 144 // Wait for the request to drop back to zero. 145 if (!dst_req) begin 146 dst_fsm_d = LoSt; 147 end 148 end 149 //VCS coverage off 150 // pragma coverage off 151 default: ; 152 //VCS coverage on 153 // pragma coverage on 154 endcase 155 end 156 157 // Move REQ over to DST domain. 158 prim_flop_2sync #( 159 .Width(1) 160 ) req_sync ( 161 .clk_i (clk_dst_i), 162 .rst_ni (rst_dst_ni), 163 .d_i (src_req), 164 .q_o (dst_req) 165 ); 166 167 // Registers 168 always_ff @(posedge clk_dst_i or negedge rst_dst_ni) begin 169 if (!rst_dst_ni) begin 170 dst_fsm_q <= LoSt; 171 end else begin 172 dst_fsm_q <= dst_fsm_d; 173 end 174 end 175 176 end else begin : gen_nrz_hs_protocol 177 ////////////////// 178 // NRZ protocol // 179 ////////////////// 180 181 // Types 182 typedef enum logic { 183 EVEN, ODD 184 } sync_reqack_fsm_e; 185 186 // Signals 187 sync_reqack_fsm_e src_fsm_ns, src_fsm_cs; 188 sync_reqack_fsm_e dst_fsm_ns, dst_fsm_cs; 189 190 logic src_req_d, src_req_q, src_ack; 191 logic dst_ack_d, dst_ack_q, dst_req; 192 logic src_handshake, dst_handshake; 193 194 1/1 assign src_handshake = src_req_i & src_ack_o; Tests: T1 T2 T3  195 1/1 assign dst_handshake = dst_req_o & dst_ack_i; Tests: T1 T2 T3  196 197 // Move REQ over to DST domain. 198 prim_flop_2sync #( 199 .Width(1) 200 ) req_sync ( 201 .clk_i (clk_dst_i), 202 .rst_ni (rst_dst_ni), 203 .d_i (src_req_q), 204 .q_o (dst_req) 205 ); 206 207 // Move ACK over to SRC domain. 208 prim_flop_2sync #( 209 .Width(1) 210 ) ack_sync ( 211 .clk_i (clk_src_i), 212 .rst_ni (rst_src_ni), 213 .d_i (dst_ack_q), 214 .q_o (src_ack) 215 ); 216 217 // REQ-side FSM (SRC domain) 218 always_comb begin : src_fsm 219 1/1 src_fsm_ns = src_fsm_cs; Tests: T1 T2 T3  220 221 // By default, we keep the internal REQ value and don't ACK. 222 1/1 src_req_d = src_req_q; Tests: T1 T2 T3  223 1/1 src_ack_o = 1'b0; Tests: T1 T2 T3  224 225 1/1 unique case (src_fsm_cs) Tests: T1 T2 T3  226 227 EVEN: begin 228 // Simply forward REQ and ACK. 229 1/1 src_req_d = src_req_i; Tests: T1 T2 T3  230 1/1 src_ack_o = src_ack; Tests: T1 T2 T3  231 232 // The handshake is done for exactly 1 clock cycle. 233 1/1 if (src_handshake) begin Tests: T1 T2 T3  234 1/1 src_fsm_ns = ODD; Tests: T1 T2 T3  235 end MISSING_ELSE 236 end 237 238 ODD: begin 239 // Internal REQ and ACK have inverted meaning now. If src_req_i is high again, this 240 // signals a new transaction. 241 1/1 src_req_d = ~src_req_i; Tests: T1 T2 T3  242 1/1 src_ack_o = ~src_ack; Tests: T1 T2 T3  243 244 // The handshake is done for exactly 1 clock cycle. 245 1/1 if (src_handshake) begin Tests: T1 T2 T3  246 1/1 src_fsm_ns = EVEN; Tests: T1 T2 T3  247 end MISSING_ELSE 248 end 249 250 //VCS coverage off 251 // pragma coverage off 252 253 default: ; 254 255 //VCS coverage on 256 // pragma coverage on 257 258 endcase 259 end 260 261 // ACK-side FSM (DST domain) 262 always_comb begin : dst_fsm 263 1/1 dst_fsm_ns = dst_fsm_cs; Tests: T1 T2 T3  264 265 // By default, we don't REQ and keep the internal ACK. 266 1/1 dst_req_o = 1'b0; Tests: T1 T2 T3  267 1/1 dst_ack_d = dst_ack_q; Tests: T1 T2 T3  268 269 1/1 unique case (dst_fsm_cs) Tests: T1 T2 T3  270 271 EVEN: begin 272 // Simply forward REQ and ACK. 273 1/1 dst_req_o = dst_req; Tests: T1 T2 T3  274 1/1 dst_ack_d = dst_ack_i; Tests: T1 T2 T3  275 276 // The handshake is done for exactly 1 clock cycle. 277 1/1 if (dst_handshake) begin Tests: T1 T2 T3  278 1/1 dst_fsm_ns = ODD; Tests: T1 T2 T3  279 end MISSING_ELSE 280 end 281 282 ODD: begin 283 // Internal REQ and ACK have inverted meaning now. If dst_req goes low, this signals a new 284 // transaction. 285 1/1 dst_req_o = ~dst_req; Tests: T1 T2 T3  286 1/1 dst_ack_d = ~dst_ack_i; Tests: T1 T2 T3  287 288 // The handshake is done for exactly 1 clock cycle. 289 1/1 if (dst_handshake) begin Tests: T1 T2 T3  290 1/1 dst_fsm_ns = EVEN; Tests: T1 T2 T3  291 end MISSING_ELSE 292 end 293 294 //VCS coverage off 295 // pragma coverage off 296 297 default: ; 298 299 //VCS coverage on 300 // pragma coverage on 301 302 endcase 303 end 304 305 // Registers 306 always_ff @(posedge clk_src_i or negedge rst_src_ni) begin 307 1/1 if (!rst_src_ni) begin Tests: T1 T2 T3  308 1/1 src_fsm_cs <= EVEN; Tests: T1 T2 T3  309 1/1 src_req_q <= 1'b0; Tests: T1 T2 T3  310 end else begin 311 1/1 src_fsm_cs <= src_fsm_ns; Tests: T1 T2 T3  312 1/1 src_req_q <= src_req_d; Tests: T1 T2 T3  313 end 314 end 315 always_ff @(posedge clk_dst_i or negedge rst_dst_ni) begin 316 1/1 if (!rst_dst_ni) begin Tests: T1 T2 T3  317 1/1 dst_fsm_cs <= EVEN; Tests: T1 T2 T3  318 1/1 dst_ack_q <= 1'b0; Tests: T1 T2 T3  319 end else begin 320 1/1 dst_fsm_cs <= dst_fsm_ns; Tests: T1 T2 T3  321 1/1 dst_ack_q <= dst_ack_d; Tests: T1 T2 T3  322 end 323 end 324 end 325 326 //////////////// 327 // Assertions // 328 //////////////// 329 330 `ifdef INC_ASSERT 331 //VCS coverage off 332 // pragma coverage off 333 334 logic effective_rst_n; 335 unreachable assign effective_rst_n = rst_src_ni && rst_dst_ni; 336 337 logic chk_flag; 338 always_ff @(posedge clk_src_i or negedge effective_rst_n) begin 339 unreachable if (!effective_rst_n) begin 340 unreachable chk_flag <= '0; 341 unreachable end else if (src_req_i && !chk_flag) begin 342 unreachable chk_flag <= 1'b1; 343 end ==> MISSING_ELSE

Cond Coverage for Module : prim_sync_reqack
TotalCoveredPercent
Conditions6583.33
Logical6583.33
Non-Logical00
Event00

 LINE       194
 EXPRESSION (src_req_i & src_ack_o)
             ----1----   ----2----
-1--2-StatusTests
01Not Covered
10CoveredT1,T2,T3
11CoveredT1,T2,T3

 LINE       195
 EXPRESSION (dst_req_o & dst_ack_i)
             ----1----   ----2----
-1--2-StatusTests
01CoveredT1,T2,T3
10CoveredT1,T2,T3
11CoveredT1,T2,T3

Branch Coverage for Module : prim_sync_reqack
Line No.TotalCoveredPercent
Branches 12 12 100.00
CASE 225 4 4 100.00
CASE 269 4 4 100.00
IF 307 2 2 100.00
IF 316 2 2 100.00


225 unique case (src_fsm_cs) -1- 226 227 EVEN: begin 228 // Simply forward REQ and ACK. 229 src_req_d = src_req_i; 230 src_ack_o = src_ack; 231 232 // The handshake is done for exactly 1 clock cycle. 233 if (src_handshake) begin -2- 234 src_fsm_ns = ODD; ==> 235 end MISSING_ELSE ==> 236 end 237 238 ODD: begin 239 // Internal REQ and ACK have inverted meaning now. If src_req_i is high again, this 240 // signals a new transaction. 241 src_req_d = ~src_req_i; 242 src_ack_o = ~src_ack; 243 244 // The handshake is done for exactly 1 clock cycle. 245 if (src_handshake) begin -3- 246 src_fsm_ns = EVEN; ==> 247 end MISSING_ELSE ==>

Branches:
-1--2--3-StatusTests
EVEN 1 - Covered T1,T2,T3
EVEN 0 - Covered T1,T2,T3
ODD - 1 Covered T1,T2,T3
ODD - 0 Covered T1,T2,T3


269 unique case (dst_fsm_cs) -1- 270 271 EVEN: begin 272 // Simply forward REQ and ACK. 273 dst_req_o = dst_req; 274 dst_ack_d = dst_ack_i; 275 276 // The handshake is done for exactly 1 clock cycle. 277 if (dst_handshake) begin -2- 278 dst_fsm_ns = ODD; ==> 279 end MISSING_ELSE ==> 280 end 281 282 ODD: begin 283 // Internal REQ and ACK have inverted meaning now. If dst_req goes low, this signals a new 284 // transaction. 285 dst_req_o = ~dst_req; 286 dst_ack_d = ~dst_ack_i; 287 288 // The handshake is done for exactly 1 clock cycle. 289 if (dst_handshake) begin -3- 290 dst_fsm_ns = EVEN; ==> 291 end MISSING_ELSE ==>

Branches:
-1--2--3-StatusTests
EVEN 1 - Covered T1,T2,T3
EVEN 0 - Covered T1,T2,T3
ODD - 1 Covered T1,T2,T3
ODD - 0 Covered T1,T2,T3


307 if (!rst_src_ni) begin -1- 308 src_fsm_cs <= EVEN; ==> 309 src_req_q <= 1'b0; 310 end else begin 311 src_fsm_cs <= src_fsm_ns; ==>

Branches:
-1-StatusTests
1 Covered T1,T2,T3
0 Covered T1,T2,T3


316 if (!rst_dst_ni) begin -1- 317 dst_fsm_cs <= EVEN; ==> 318 dst_ack_q <= 1'b0; 319 end else begin 320 dst_fsm_cs <= dst_fsm_ns; ==>

Branches:
-1-StatusTests
1 Covered T1,T2,T3
0 Covered T1,T2,T3


Assert Coverage for Module : prim_sync_reqack
TotalAttemptedPercentSucceeded/MatchedPercent
Assertions 2 2 100.00 2 100.00
Cover properties 0 0 0
Cover sequences 0 0 0
Total 2 2 100.00 2 100.00




Assertion Details

NameAttemptsReal SuccessesFailuresIncomplete
SyncReqAckAckNeedsReq 40833772 92401 0 0
SyncReqAckHoldReq 21705443 46141 0 0


SyncReqAckAckNeedsReq
NameAttemptsReal SuccessesFailuresIncomplete
Total 40833772 92401 0 0
T1 5239 65 0 0
T2 18057 6 0 0
T3 204555 67 0 0
T4 1577 8 0 0
T13 341 0 0 0
T14 4324 46 0 0
T15 13792 60 0 0
T16 18943 6 0 0
T17 9788 94 0 0
T18 3019 10 0 0
T35 0 18 0 0

SyncReqAckHoldReq
NameAttemptsReal SuccessesFailuresIncomplete
Total 21705443 46141 0 0
T1 5456 32 0 0
T2 18058 3 0 0
T3 17046 33 0 0
T4 5438 4 0 0
T13 1307 0 0 0
T14 4324 23 0 0
T15 4964 30 0 0
T16 4832 3 0 0
T17 9788 47 0 0
T18 11952 5 0 0
T35 0 9 0 0

0% 10% 20% 30% 40% 50% 60% 70% 80% 90% 100%