Line Coverage for Module :
prim_pulse_sync
| Line No. | Total | Covered | Percent |
TOTAL | | 7 | 7 | 100.00 |
ALWAYS | 31 | 3 | 3 | 100.00 |
CONT_ASSIGN | 49 | 0 | 0 | |
CONT_ASSIGN | 52 | 0 | 0 | |
ALWAYS | 55 | 0 | 0 | |
ALWAYS | 89 | 3 | 3 | 100.00 |
CONT_ASSIGN | 97 | 1 | 1 | 100.00 |
30 always_ff @(posedge clk_src_i or negedge rst_src_ni) begin
31 1/1 if (!rst_src_ni) begin
Tests: T1 T2 T3
32 1/1 src_level <= 1'b0;
Tests: T1 T2 T3
33 end else begin
34 1/1 src_level <= src_level ^ src_pulse_i;
Tests: T3 T4 T6
35 end
36 end
37
38
39 // source active must come far enough such that the destination domain has time
40 // to create a valid pulse.
41 `ifdef INC_ASSERT
42 //VCS coverage off
43 // pragma coverage off
44
45 // source active flag tracks whether there is an ongoing "toggle" event.
46 // Until this toggle event is accepted by the destination domain (negative edge of
47 // of the pulse output), the source side cannot toggle again.
48 logic effective_rst_n;
49 unreachable assign effective_rst_n = rst_src_ni && dst_pulse_o;
50
51 logic src_active_flag_d, src_active_flag_q;
52 unreachable assign src_active_flag_d = src_pulse_i || src_active_flag_q;
53
54 always_ff @(posedge clk_src_i or negedge effective_rst_n) begin
55 unreachable if (!effective_rst_n) begin
56 unreachable src_active_flag_q <= '0;
57 end else begin
58 unreachable src_active_flag_q <= src_active_flag_d;
59 end
60 end
61
62 //VCS coverage on
63 // pragma coverage on
64
65 `ASSERT(SrcPulseCheck_M, src_pulse_i |-> !src_active_flag_q, clk_src_i, !rst_src_ni)
66 `endif
67
68 //////////////////////////////////////////////////////////
69 // synchronize level signal to destination clock domain //
70 //////////////////////////////////////////////////////////
71 logic dst_level;
72
73 prim_flop_2sync #(.Width(1)) prim_flop_2sync (
74 // source clock domain
75 .d_i (src_level),
76 // destination clock domain
77 .clk_i (clk_dst_i),
78 .rst_ni (rst_dst_ni),
79 .q_o (dst_level)
80 );
81
82 ////////////////////////////////////////
83 // convert level signal back to pulse //
84 ////////////////////////////////////////
85 logic dst_level_q;
86
87 // delay dst_level by 1 cycle
88 always_ff @(posedge clk_dst_i or negedge rst_dst_ni) begin
89 1/1 if (!rst_dst_ni) begin
Tests: T1 T2 T3
90 1/1 dst_level_q <= 1'b0;
Tests: T1 T2 T3
91 end else begin
92 1/1 dst_level_q <= dst_level;
Tests: T1 T2 T3
93 end
94 end
95
96 // edge detection
97 1/1 assign dst_pulse_o = dst_level_q ^ dst_level;
Tests: T1 T2 T3
Cond Coverage for Module :
prim_pulse_sync
| Total | Covered | Percent |
Conditions | 8 | 8 | 100.00 |
Logical | 8 | 8 | 100.00 |
Non-Logical | 0 | 0 | |
Event | 0 | 0 | |
LINE 34
EXPRESSION (src_level ^ src_pulse_i)
----1---- -----2-----
-1- | -2- | Status | Tests |
0 | 0 | Covered | T3,T4,T6 |
0 | 1 | Covered | T19,T25,T51 |
1 | 0 | Covered | T19,T25,T51 |
1 | 1 | Covered | T19,T25,T51 |
LINE 97
EXPRESSION (dst_level_q ^ dst_level)
-----1----- ----2----
-1- | -2- | Status | Tests |
0 | 0 | Covered | T1,T2,T3 |
0 | 1 | Covered | T19,T25,T51 |
1 | 0 | Covered | T19,T25,T51 |
1 | 1 | Covered | T19,T25,T51 |
Branch Coverage for Module :
prim_pulse_sync
| Line No. | Total | Covered | Percent |
Branches |
|
4 |
4 |
100.00 |
IF |
31 |
2 |
2 |
100.00 |
IF |
89 |
2 |
2 |
100.00 |
31 if (!rst_src_ni) begin
-1-
32 src_level <= 1'b0;
==>
33 end else begin
34 src_level <= src_level ^ src_pulse_i;
==>
Branches:
-1- | Status | Tests |
1 |
Covered |
T1,T2,T3 |
0 |
Covered |
T3,T4,T6 |
89 if (!rst_dst_ni) begin
-1-
90 dst_level_q <= 1'b0;
==>
91 end else begin
92 dst_level_q <= dst_level;
==>
Branches:
-1- | Status | Tests |
1 |
Covered |
T1,T2,T3 |
0 |
Covered |
T1,T2,T3 |
Assert Coverage for Module :
prim_pulse_sync
Assertion Details
DstPulseCheck_A
Name | Attempts | Real Successes | Failures | Incomplete |
Total |
1359396522 |
2920 |
0 |
0 |
T19 |
47598 |
7 |
0 |
0 |
T20 |
116626 |
0 |
0 |
0 |
T21 |
30258 |
0 |
0 |
0 |
T22 |
3564 |
0 |
0 |
0 |
T25 |
0 |
7 |
0 |
0 |
T27 |
3136 |
0 |
0 |
0 |
T28 |
597652 |
0 |
0 |
0 |
T31 |
15366 |
0 |
0 |
0 |
T40 |
9866 |
0 |
0 |
0 |
T41 |
0 |
2 |
0 |
0 |
T42 |
0 |
16 |
0 |
0 |
T45 |
5304 |
0 |
0 |
0 |
T46 |
176935 |
4 |
0 |
0 |
T47 |
385803 |
0 |
0 |
0 |
T51 |
0 |
4 |
0 |
0 |
T52 |
0 |
7 |
0 |
0 |
T53 |
0 |
6 |
0 |
0 |
T54 |
0 |
6 |
0 |
0 |
T55 |
0 |
9 |
0 |
0 |
T57 |
0 |
2 |
0 |
0 |
T58 |
387327 |
3 |
0 |
0 |
T69 |
0 |
13 |
0 |
0 |
T70 |
307186 |
0 |
0 |
0 |
T76 |
3173 |
0 |
0 |
0 |
T77 |
89616 |
0 |
0 |
0 |
T78 |
1336 |
0 |
0 |
0 |
T79 |
403942 |
0 |
0 |
0 |
T80 |
50440 |
7 |
0 |
0 |
T81 |
233320 |
0 |
0 |
0 |
T82 |
0 |
3 |
0 |
0 |
T93 |
0 |
20 |
0 |
0 |
T100 |
1942 |
0 |
0 |
0 |
T124 |
0 |
7 |
0 |
0 |
T168 |
0 |
2 |
0 |
0 |
T169 |
0 |
2 |
0 |
0 |
T170 |
0 |
7 |
0 |
0 |
T171 |
0 |
2 |
0 |
0 |
SrcPulseCheck_M
Name | Attempts | Real Successes | Failures | Incomplete |
Total |
455914902 |
2920 |
0 |
0 |
T19 |
39660 |
7 |
0 |
0 |
T20 |
111064 |
0 |
0 |
0 |
T21 |
48544 |
0 |
0 |
0 |
T23 |
69862 |
0 |
0 |
0 |
T24 |
125394 |
0 |
0 |
0 |
T25 |
37590 |
7 |
0 |
0 |
T26 |
87248 |
0 |
0 |
0 |
T27 |
288 |
0 |
0 |
0 |
T28 |
175620 |
0 |
0 |
0 |
T29 |
7546 |
0 |
0 |
0 |
T41 |
0 |
2 |
0 |
0 |
T42 |
0 |
16 |
0 |
0 |
T46 |
141556 |
4 |
0 |
0 |
T47 |
62477 |
0 |
0 |
0 |
T51 |
0 |
4 |
0 |
0 |
T52 |
0 |
7 |
0 |
0 |
T53 |
0 |
6 |
0 |
0 |
T54 |
0 |
6 |
0 |
0 |
T55 |
0 |
9 |
0 |
0 |
T57 |
0 |
2 |
0 |
0 |
T58 |
77204 |
3 |
0 |
0 |
T69 |
0 |
13 |
0 |
0 |
T70 |
42231 |
0 |
0 |
0 |
T76 |
792 |
0 |
0 |
0 |
T77 |
14326 |
0 |
0 |
0 |
T78 |
1264 |
0 |
0 |
0 |
T79 |
49287 |
0 |
0 |
0 |
T80 |
14400 |
7 |
0 |
0 |
T81 |
53721 |
0 |
0 |
0 |
T82 |
0 |
3 |
0 |
0 |
T93 |
0 |
20 |
0 |
0 |
T124 |
0 |
7 |
0 |
0 |
T168 |
0 |
2 |
0 |
0 |
T169 |
0 |
2 |
0 |
0 |
T170 |
0 |
7 |
0 |
0 |
T171 |
0 |
2 |
0 |
0 |
Line Coverage for Instance : tb.dut.u_flash_readbuf_watermark_pulse_sync
| Line No. | Total | Covered | Percent |
TOTAL | | 7 | 7 | 100.00 |
ALWAYS | 31 | 3 | 3 | 100.00 |
CONT_ASSIGN | 49 | 0 | 0 | |
CONT_ASSIGN | 52 | 0 | 0 | |
ALWAYS | 55 | 0 | 0 | |
ALWAYS | 89 | 3 | 3 | 100.00 |
CONT_ASSIGN | 97 | 1 | 1 | 100.00 |
30 always_ff @(posedge clk_src_i or negedge rst_src_ni) begin
31 1/1 if (!rst_src_ni) begin
Tests: T1 T2 T3
32 1/1 src_level <= 1'b0;
Tests: T1 T2 T3
33 end else begin
34 1/1 src_level <= src_level ^ src_pulse_i;
Tests: T3 T4 T6
35 end
36 end
37
38
39 // source active must come far enough such that the destination domain has time
40 // to create a valid pulse.
41 `ifdef INC_ASSERT
42 //VCS coverage off
43 // pragma coverage off
44
45 // source active flag tracks whether there is an ongoing "toggle" event.
46 // Until this toggle event is accepted by the destination domain (negative edge of
47 // of the pulse output), the source side cannot toggle again.
48 logic effective_rst_n;
49 unreachable assign effective_rst_n = rst_src_ni && dst_pulse_o;
50
51 logic src_active_flag_d, src_active_flag_q;
52 unreachable assign src_active_flag_d = src_pulse_i || src_active_flag_q;
53
54 always_ff @(posedge clk_src_i or negedge effective_rst_n) begin
55 unreachable if (!effective_rst_n) begin
56 unreachable src_active_flag_q <= '0;
57 end else begin
58 unreachable src_active_flag_q <= src_active_flag_d;
59 end
60 end
61
62 //VCS coverage on
63 // pragma coverage on
64
65 `ASSERT(SrcPulseCheck_M, src_pulse_i |-> !src_active_flag_q, clk_src_i, !rst_src_ni)
66 `endif
67
68 //////////////////////////////////////////////////////////
69 // synchronize level signal to destination clock domain //
70 //////////////////////////////////////////////////////////
71 logic dst_level;
72
73 prim_flop_2sync #(.Width(1)) prim_flop_2sync (
74 // source clock domain
75 .d_i (src_level),
76 // destination clock domain
77 .clk_i (clk_dst_i),
78 .rst_ni (rst_dst_ni),
79 .q_o (dst_level)
80 );
81
82 ////////////////////////////////////////
83 // convert level signal back to pulse //
84 ////////////////////////////////////////
85 logic dst_level_q;
86
87 // delay dst_level by 1 cycle
88 always_ff @(posedge clk_dst_i or negedge rst_dst_ni) begin
89 1/1 if (!rst_dst_ni) begin
Tests: T1 T2 T3
90 1/1 dst_level_q <= 1'b0;
Tests: T1 T2 T3
91 end else begin
92 1/1 dst_level_q <= dst_level;
Tests: T1 T2 T3
93 end
94 end
95
96 // edge detection
97 1/1 assign dst_pulse_o = dst_level_q ^ dst_level;
Tests: T1 T2 T3
Cond Coverage for Instance : tb.dut.u_flash_readbuf_watermark_pulse_sync
| Total | Covered | Percent |
Conditions | 8 | 8 | 100.00 |
Logical | 8 | 8 | 100.00 |
Non-Logical | 0 | 0 | |
Event | 0 | 0 | |
LINE 34
EXPRESSION (src_level ^ src_pulse_i)
----1---- -----2-----
-1- | -2- | Status | Tests |
0 | 0 | Covered | T3,T4,T6 |
0 | 1 | Covered | T19,T25,T51 |
1 | 0 | Covered | T19,T25,T51 |
1 | 1 | Covered | T19,T25,T51 |
LINE 97
EXPRESSION (dst_level_q ^ dst_level)
-----1----- ----2----
-1- | -2- | Status | Tests |
0 | 0 | Covered | T1,T2,T3 |
0 | 1 | Covered | T19,T25,T51 |
1 | 0 | Covered | T19,T25,T51 |
1 | 1 | Covered | T19,T25,T51 |
Branch Coverage for Instance : tb.dut.u_flash_readbuf_watermark_pulse_sync
| Line No. | Total | Covered | Percent |
Branches |
|
4 |
4 |
100.00 |
IF |
31 |
2 |
2 |
100.00 |
IF |
89 |
2 |
2 |
100.00 |
31 if (!rst_src_ni) begin
-1-
32 src_level <= 1'b0;
==>
33 end else begin
34 src_level <= src_level ^ src_pulse_i;
==>
Branches:
-1- | Status | Tests |
1 |
Covered |
T1,T2,T3 |
0 |
Covered |
T3,T4,T6 |
89 if (!rst_dst_ni) begin
-1-
90 dst_level_q <= 1'b0;
==>
91 end else begin
92 dst_level_q <= dst_level;
==>
Branches:
-1- | Status | Tests |
1 |
Covered |
T1,T2,T3 |
0 |
Covered |
T1,T2,T3 |
Assert Coverage for Instance : tb.dut.u_flash_readbuf_watermark_pulse_sync
Assertion Details
DstPulseCheck_A
Name | Attempts | Real Successes | Failures | Incomplete |
Total |
453132174 |
162 |
0 |
0 |
T19 |
23799 |
2 |
0 |
0 |
T20 |
58313 |
0 |
0 |
0 |
T21 |
15129 |
0 |
0 |
0 |
T22 |
1782 |
0 |
0 |
0 |
T25 |
0 |
2 |
0 |
0 |
T27 |
1568 |
0 |
0 |
0 |
T28 |
298826 |
0 |
0 |
0 |
T31 |
7683 |
0 |
0 |
0 |
T40 |
4933 |
0 |
0 |
0 |
T41 |
0 |
1 |
0 |
0 |
T45 |
2652 |
0 |
0 |
0 |
T51 |
0 |
2 |
0 |
0 |
T52 |
0 |
2 |
0 |
0 |
T80 |
0 |
2 |
0 |
0 |
T100 |
971 |
0 |
0 |
0 |
T124 |
0 |
2 |
0 |
0 |
T168 |
0 |
1 |
0 |
0 |
T170 |
0 |
2 |
0 |
0 |
T171 |
0 |
2 |
0 |
0 |
SrcPulseCheck_M
Name | Attempts | Real Successes | Failures | Incomplete |
Total |
151971634 |
162 |
0 |
0 |
T19 |
19830 |
2 |
0 |
0 |
T20 |
55532 |
0 |
0 |
0 |
T21 |
24272 |
0 |
0 |
0 |
T23 |
34931 |
0 |
0 |
0 |
T24 |
62697 |
0 |
0 |
0 |
T25 |
18795 |
2 |
0 |
0 |
T26 |
43624 |
0 |
0 |
0 |
T27 |
144 |
0 |
0 |
0 |
T28 |
87810 |
0 |
0 |
0 |
T29 |
3773 |
0 |
0 |
0 |
T41 |
0 |
1 |
0 |
0 |
T51 |
0 |
2 |
0 |
0 |
T52 |
0 |
2 |
0 |
0 |
T80 |
0 |
2 |
0 |
0 |
T124 |
0 |
2 |
0 |
0 |
T168 |
0 |
1 |
0 |
0 |
T170 |
0 |
2 |
0 |
0 |
T171 |
0 |
2 |
0 |
0 |
Line Coverage for Instance : tb.dut.u_flash_readbuf_flip_pulse_sync
| Line No. | Total | Covered | Percent |
TOTAL | | 7 | 7 | 100.00 |
ALWAYS | 31 | 3 | 3 | 100.00 |
CONT_ASSIGN | 49 | 0 | 0 | |
CONT_ASSIGN | 52 | 0 | 0 | |
ALWAYS | 55 | 0 | 0 | |
ALWAYS | 89 | 3 | 3 | 100.00 |
CONT_ASSIGN | 97 | 1 | 1 | 100.00 |
30 always_ff @(posedge clk_src_i or negedge rst_src_ni) begin
31 1/1 if (!rst_src_ni) begin
Tests: T1 T2 T3
32 1/1 src_level <= 1'b0;
Tests: T1 T2 T3
33 end else begin
34 1/1 src_level <= src_level ^ src_pulse_i;
Tests: T3 T4 T6
35 end
36 end
37
38
39 // source active must come far enough such that the destination domain has time
40 // to create a valid pulse.
41 `ifdef INC_ASSERT
42 //VCS coverage off
43 // pragma coverage off
44
45 // source active flag tracks whether there is an ongoing "toggle" event.
46 // Until this toggle event is accepted by the destination domain (negative edge of
47 // of the pulse output), the source side cannot toggle again.
48 logic effective_rst_n;
49 unreachable assign effective_rst_n = rst_src_ni && dst_pulse_o;
50
51 logic src_active_flag_d, src_active_flag_q;
52 unreachable assign src_active_flag_d = src_pulse_i || src_active_flag_q;
53
54 always_ff @(posedge clk_src_i or negedge effective_rst_n) begin
55 unreachable if (!effective_rst_n) begin
56 unreachable src_active_flag_q <= '0;
57 end else begin
58 unreachable src_active_flag_q <= src_active_flag_d;
59 end
60 end
61
62 //VCS coverage on
63 // pragma coverage on
64
65 `ASSERT(SrcPulseCheck_M, src_pulse_i |-> !src_active_flag_q, clk_src_i, !rst_src_ni)
66 `endif
67
68 //////////////////////////////////////////////////////////
69 // synchronize level signal to destination clock domain //
70 //////////////////////////////////////////////////////////
71 logic dst_level;
72
73 prim_flop_2sync #(.Width(1)) prim_flop_2sync (
74 // source clock domain
75 .d_i (src_level),
76 // destination clock domain
77 .clk_i (clk_dst_i),
78 .rst_ni (rst_dst_ni),
79 .q_o (dst_level)
80 );
81
82 ////////////////////////////////////////
83 // convert level signal back to pulse //
84 ////////////////////////////////////////
85 logic dst_level_q;
86
87 // delay dst_level by 1 cycle
88 always_ff @(posedge clk_dst_i or negedge rst_dst_ni) begin
89 1/1 if (!rst_dst_ni) begin
Tests: T1 T2 T3
90 1/1 dst_level_q <= 1'b0;
Tests: T1 T2 T3
91 end else begin
92 1/1 dst_level_q <= dst_level;
Tests: T1 T2 T3
93 end
94 end
95
96 // edge detection
97 1/1 assign dst_pulse_o = dst_level_q ^ dst_level;
Tests: T1 T2 T3
Cond Coverage for Instance : tb.dut.u_flash_readbuf_flip_pulse_sync
| Total | Covered | Percent |
Conditions | 8 | 8 | 100.00 |
Logical | 8 | 8 | 100.00 |
Non-Logical | 0 | 0 | |
Event | 0 | 0 | |
LINE 34
EXPRESSION (src_level ^ src_pulse_i)
----1---- -----2-----
-1- | -2- | Status | Tests |
0 | 0 | Covered | T3,T4,T6 |
0 | 1 | Covered | T19,T25,T51 |
1 | 0 | Covered | T19,T25,T51 |
1 | 1 | Covered | T19,T25,T51 |
LINE 97
EXPRESSION (dst_level_q ^ dst_level)
-----1----- ----2----
-1- | -2- | Status | Tests |
0 | 0 | Covered | T1,T2,T3 |
0 | 1 | Covered | T19,T25,T51 |
1 | 0 | Covered | T19,T25,T51 |
1 | 1 | Covered | T19,T25,T51 |
Branch Coverage for Instance : tb.dut.u_flash_readbuf_flip_pulse_sync
| Line No. | Total | Covered | Percent |
Branches |
|
4 |
4 |
100.00 |
IF |
31 |
2 |
2 |
100.00 |
IF |
89 |
2 |
2 |
100.00 |
31 if (!rst_src_ni) begin
-1-
32 src_level <= 1'b0;
==>
33 end else begin
34 src_level <= src_level ^ src_pulse_i;
==>
Branches:
-1- | Status | Tests |
1 |
Covered |
T1,T2,T3 |
0 |
Covered |
T3,T4,T6 |
89 if (!rst_dst_ni) begin
-1-
90 dst_level_q <= 1'b0;
==>
91 end else begin
92 dst_level_q <= dst_level;
==>
Branches:
-1- | Status | Tests |
1 |
Covered |
T1,T2,T3 |
0 |
Covered |
T1,T2,T3 |
Assert Coverage for Instance : tb.dut.u_flash_readbuf_flip_pulse_sync
Assertion Details
DstPulseCheck_A
Name | Attempts | Real Successes | Failures | Incomplete |
Total |
453132174 |
308 |
0 |
0 |
T19 |
23799 |
5 |
0 |
0 |
T20 |
58313 |
0 |
0 |
0 |
T21 |
15129 |
0 |
0 |
0 |
T22 |
1782 |
0 |
0 |
0 |
T25 |
0 |
5 |
0 |
0 |
T27 |
1568 |
0 |
0 |
0 |
T28 |
298826 |
0 |
0 |
0 |
T31 |
7683 |
0 |
0 |
0 |
T40 |
4933 |
0 |
0 |
0 |
T41 |
0 |
1 |
0 |
0 |
T45 |
2652 |
0 |
0 |
0 |
T51 |
0 |
2 |
0 |
0 |
T52 |
0 |
5 |
0 |
0 |
T80 |
0 |
5 |
0 |
0 |
T100 |
971 |
0 |
0 |
0 |
T124 |
0 |
5 |
0 |
0 |
T168 |
0 |
1 |
0 |
0 |
T169 |
0 |
2 |
0 |
0 |
T170 |
0 |
5 |
0 |
0 |
SrcPulseCheck_M
Name | Attempts | Real Successes | Failures | Incomplete |
Total |
151971634 |
308 |
0 |
0 |
T19 |
19830 |
5 |
0 |
0 |
T20 |
55532 |
0 |
0 |
0 |
T21 |
24272 |
0 |
0 |
0 |
T23 |
34931 |
0 |
0 |
0 |
T24 |
62697 |
0 |
0 |
0 |
T25 |
18795 |
5 |
0 |
0 |
T26 |
43624 |
0 |
0 |
0 |
T27 |
144 |
0 |
0 |
0 |
T28 |
87810 |
0 |
0 |
0 |
T29 |
3773 |
0 |
0 |
0 |
T41 |
0 |
1 |
0 |
0 |
T51 |
0 |
2 |
0 |
0 |
T52 |
0 |
5 |
0 |
0 |
T80 |
0 |
5 |
0 |
0 |
T124 |
0 |
5 |
0 |
0 |
T168 |
0 |
1 |
0 |
0 |
T169 |
0 |
2 |
0 |
0 |
T170 |
0 |
5 |
0 |
0 |
Line Coverage for Instance : tb.dut.u_upload.u_payloadptr_clr_psync
| Line No. | Total | Covered | Percent |
TOTAL | | 7 | 7 | 100.00 |
ALWAYS | 31 | 3 | 3 | 100.00 |
CONT_ASSIGN | 49 | 0 | 0 | |
CONT_ASSIGN | 52 | 0 | 0 | |
ALWAYS | 55 | 0 | 0 | |
ALWAYS | 89 | 3 | 3 | 100.00 |
CONT_ASSIGN | 97 | 1 | 1 | 100.00 |
30 always_ff @(posedge clk_src_i or negedge rst_src_ni) begin
31 1/1 if (!rst_src_ni) begin
Tests: T1 T2 T3
32 1/1 src_level <= 1'b0;
Tests: T1 T2 T3
33 end else begin
34 1/1 src_level <= src_level ^ src_pulse_i;
Tests: T3 T4 T6
35 end
36 end
37
38
39 // source active must come far enough such that the destination domain has time
40 // to create a valid pulse.
41 `ifdef INC_ASSERT
42 //VCS coverage off
43 // pragma coverage off
44
45 // source active flag tracks whether there is an ongoing "toggle" event.
46 // Until this toggle event is accepted by the destination domain (negative edge of
47 // of the pulse output), the source side cannot toggle again.
48 logic effective_rst_n;
49 unreachable assign effective_rst_n = rst_src_ni && dst_pulse_o;
50
51 logic src_active_flag_d, src_active_flag_q;
52 unreachable assign src_active_flag_d = src_pulse_i || src_active_flag_q;
53
54 always_ff @(posedge clk_src_i or negedge effective_rst_n) begin
55 unreachable if (!effective_rst_n) begin
56 unreachable src_active_flag_q <= '0;
57 end else begin
58 unreachable src_active_flag_q <= src_active_flag_d;
59 end
60 end
61
62 //VCS coverage on
63 // pragma coverage on
64
65 `ASSERT(SrcPulseCheck_M, src_pulse_i |-> !src_active_flag_q, clk_src_i, !rst_src_ni)
66 `endif
67
68 //////////////////////////////////////////////////////////
69 // synchronize level signal to destination clock domain //
70 //////////////////////////////////////////////////////////
71 logic dst_level;
72
73 prim_flop_2sync #(.Width(1)) prim_flop_2sync (
74 // source clock domain
75 .d_i (src_level),
76 // destination clock domain
77 .clk_i (clk_dst_i),
78 .rst_ni (rst_dst_ni),
79 .q_o (dst_level)
80 );
81
82 ////////////////////////////////////////
83 // convert level signal back to pulse //
84 ////////////////////////////////////////
85 logic dst_level_q;
86
87 // delay dst_level by 1 cycle
88 always_ff @(posedge clk_dst_i or negedge rst_dst_ni) begin
89 1/1 if (!rst_dst_ni) begin
Tests: T1 T2 T3
90 1/1 dst_level_q <= 1'b0;
Tests: T1 T2 T3
91 end else begin
92 1/1 dst_level_q <= dst_level;
Tests: T1 T2 T3
93 end
94 end
95
96 // edge detection
97 1/1 assign dst_pulse_o = dst_level_q ^ dst_level;
Tests: T1 T2 T3
Cond Coverage for Instance : tb.dut.u_upload.u_payloadptr_clr_psync
| Total | Covered | Percent |
Conditions | 8 | 8 | 100.00 |
Logical | 8 | 8 | 100.00 |
Non-Logical | 0 | 0 | |
Event | 0 | 0 | |
LINE 34
EXPRESSION (src_level ^ src_pulse_i)
----1---- -----2-----
-1- | -2- | Status | Tests |
0 | 0 | Covered | T3,T4,T6 |
0 | 1 | Covered | T46,T58,T53 |
1 | 0 | Covered | T46,T58,T53 |
1 | 1 | Covered | T46,T58,T53 |
LINE 97
EXPRESSION (dst_level_q ^ dst_level)
-----1----- ----2----
-1- | -2- | Status | Tests |
0 | 0 | Covered | T1,T2,T3 |
0 | 1 | Covered | T46,T58,T53 |
1 | 0 | Covered | T46,T58,T53 |
1 | 1 | Covered | T46,T58,T53 |
Branch Coverage for Instance : tb.dut.u_upload.u_payloadptr_clr_psync
| Line No. | Total | Covered | Percent |
Branches |
|
4 |
4 |
100.00 |
IF |
31 |
2 |
2 |
100.00 |
IF |
89 |
2 |
2 |
100.00 |
31 if (!rst_src_ni) begin
-1-
32 src_level <= 1'b0;
==>
33 end else begin
34 src_level <= src_level ^ src_pulse_i;
==>
Branches:
-1- | Status | Tests |
1 |
Covered |
T1,T2,T3 |
0 |
Covered |
T3,T4,T6 |
89 if (!rst_dst_ni) begin
-1-
90 dst_level_q <= 1'b0;
==>
91 end else begin
92 dst_level_q <= dst_level;
==>
Branches:
-1- | Status | Tests |
1 |
Covered |
T1,T2,T3 |
0 |
Covered |
T1,T2,T3 |
Assert Coverage for Instance : tb.dut.u_upload.u_payloadptr_clr_psync
Assertion Details
DstPulseCheck_A
Name | Attempts | Real Successes | Failures | Incomplete |
Total |
453132174 |
2450 |
0 |
0 |
T42 |
0 |
16 |
0 |
0 |
T46 |
176935 |
4 |
0 |
0 |
T47 |
385803 |
0 |
0 |
0 |
T53 |
0 |
6 |
0 |
0 |
T54 |
0 |
6 |
0 |
0 |
T55 |
0 |
9 |
0 |
0 |
T57 |
0 |
2 |
0 |
0 |
T58 |
387327 |
3 |
0 |
0 |
T69 |
0 |
13 |
0 |
0 |
T70 |
307186 |
0 |
0 |
0 |
T76 |
3173 |
0 |
0 |
0 |
T77 |
89616 |
0 |
0 |
0 |
T78 |
1336 |
0 |
0 |
0 |
T79 |
403942 |
0 |
0 |
0 |
T80 |
50440 |
0 |
0 |
0 |
T81 |
233320 |
0 |
0 |
0 |
T82 |
0 |
3 |
0 |
0 |
T93 |
0 |
20 |
0 |
0 |
SrcPulseCheck_M
Name | Attempts | Real Successes | Failures | Incomplete |
Total |
151971634 |
2450 |
0 |
0 |
T42 |
0 |
16 |
0 |
0 |
T46 |
141556 |
4 |
0 |
0 |
T47 |
62477 |
0 |
0 |
0 |
T53 |
0 |
6 |
0 |
0 |
T54 |
0 |
6 |
0 |
0 |
T55 |
0 |
9 |
0 |
0 |
T57 |
0 |
2 |
0 |
0 |
T58 |
77204 |
3 |
0 |
0 |
T69 |
0 |
13 |
0 |
0 |
T70 |
42231 |
0 |
0 |
0 |
T76 |
792 |
0 |
0 |
0 |
T77 |
14326 |
0 |
0 |
0 |
T78 |
1264 |
0 |
0 |
0 |
T79 |
49287 |
0 |
0 |
0 |
T80 |
14400 |
0 |
0 |
0 |
T81 |
53721 |
0 |
0 |
0 |
T82 |
0 |
3 |
0 |
0 |
T93 |
0 |
20 |
0 |
0 |