Line Coverage for Module :
spid_dpram
| Line No. | Total | Covered | Percent |
|---|
| TOTAL | | 18 | 18 | 100.00 |
| CONT_ASSIGN | 64 | 1 | 1 | 100.00 |
| CONT_ASSIGN | 65 | 1 | 1 | 100.00 |
| CONT_ASSIGN | 70 | 1 | 1 | 100.00 |
| CONT_ASSIGN | 71 | 1 | 1 | 100.00 |
| CONT_ASSIGN | 83 | 1 | 1 | 100.00 |
| CONT_ASSIGN | 84 | 1 | 1 | 100.00 |
| CONT_ASSIGN | 91 | 1 | 1 | 100.00 |
| CONT_ASSIGN | 92 | 1 | 1 | 100.00 |
| ALWAYS | 103 | 7 | 7 | 100.00 |
| ALWAYS | 118 | 3 | 3 | 100.00 |
63 sram_addr_t sys2spi_wr_addr;
64 1/1 assign sys2spi_wr_req = (sys_addr_i < Sys2SpiEnd) & sys_req_i & sys_write_i;
Tests: T1 T2 T3
65 1/1 assign sys2spi_wr_addr = sys_addr_i - Sys2SpiOffset;
Tests: T1 T2 T3
66
67 // SPI reads from only the Sys2Spi memory.
68 logic sys2spi_rd_req;
69 sram_addr_t sys2spi_rd_addr;
70 1/1 assign sys2spi_rd_req = spi_req_i & !spi_write_i;
Tests: T1 T2 T3
71 1/1 assign sys2spi_rd_addr = spi_addr_i - Sys2SpiOffset;
Tests: T1 T2 T3
72
73 // SPI Wr, SYS Rd is for payload upload
74 localparam sram_addr_t Spi2SysOffset = SramIngressIdx;
75 localparam int unsigned Spi2SysMinDepth = SramPayloadDepth + SramCmdFifoDepth
76 + SramAddrFifoDepth + SramTpmWrFifoDepth;
77 localparam int unsigned Spi2SysAw = $clog2(Spi2SysMinDepth);
78 localparam int unsigned Spi2SysDepth = 1 << Spi2SysAw;
79
80 // SPI writes to only the Spi2Sys memory.
81 logic spi2sys_wr_req;
82 sram_addr_t spi2sys_wr_addr;
83 1/1 assign spi2sys_wr_req = spi_req_i & spi_write_i;
Tests: T1 T2 T3
84 1/1 assign spi2sys_wr_addr = spi_addr_i - Spi2SysOffset;
Tests: T1 T2 T3
85
86 // SYS reads only read from the Spi2Sys memory.
87 // Allow all reads to complete, so the bus always gets a response, even if
88 // software chooses to read from write-only addresses.
89 logic spi2sys_rd_req;
90 sram_addr_t spi2sys_rd_addr;
91 1/1 assign spi2sys_rd_req = sys_req_i & !sys_write_i;
Tests: T1 T2 T3
92 1/1 assign spi2sys_rd_addr = sys_addr_i - Spi2SysOffset;
Tests: T1 T2 T3
93
94 // The SPI -> core buffer for the payload uses parity and SW has no way of initializing it since
95 // the write port is in the SPI domain. Since the SPI side writes the payload byte by byte,
96 // we need to guard against partially initialized 32bit words, because these could cause TL-UL
97 // bus errors upon readout. Unfortunately, an initialization circuit that initializes the entire
98 // SRAM on the SPI clock domain is infeasible since that clock is only intermittently available.
99 // Hence, we keep track of uninitialized words using a valid bit array, and upon the first write
100 // to a word, uninitialized bytes are set to zero if the write operation is a sub-word write op.
101 logic [SramDw-1:0] spi_wdata, spi_wmask;
102 logic [Spi2SysDepth-1:0] initialized_words_d, initialized_words_q;
103 1/1 always_comb begin initialized_words_d = initialized_words_q;
Tests: T1 T2 T3
104 // By default, we just loop through the data and wmask.
105 1/1 spi_wdata = spi_wdata_i;
Tests: T1 T2 T3
106 1/1 spi_wmask = spi_wmask_i;
Tests: T1 T2 T3
107 // If the word has not been initialized yet we modify the data and wmask to initialize all bits.
108 1/1 if (spi2sys_wr_req && !initialized_words_q[Spi2SysAw'(spi2sys_wr_addr)]) begin
Tests: T1 T2 T3
109 // Mask data at this point already and set all masked bits to 0.
110 1/1 spi_wdata = spi_wdata_i & spi_wmask_i;
Tests: T4 T11 T15
111 1/1 spi_wmask = {SramDw{1'b1}};
Tests: T4 T11 T15
112 // Mark this word as initialized
113 1/1 initialized_words_d[Spi2SysAw'(spi2sys_wr_addr)] = 1'b1;
Tests: T4 T11 T15
114 end
MISSING_ELSE
115 end
116
117 always_ff @(posedge clk_spi_i or negedge rst_spi_ni) begin : p_spi_regs
118 1/1 if (!rst_spi_ni) begin
Tests: T1 T2 T3
119 1/1 initialized_words_q <= '0;
Tests: T1 T2 T3
120 end else begin
121 1/1 initialized_words_q <= initialized_words_d;
Tests: T3 T4 T5
Cond Coverage for Module :
spid_dpram
| Total | Covered | Percent |
|---|
| Conditions | 16 | 12 | 75.00 |
| Logical | 16 | 12 | 75.00 |
| Non-Logical | 0 | 0 | |
| Event | 0 | 0 | |
LINE 64
EXPRESSION ((sys_addr_i < Sys2SpiEnd) & sys_req_i & sys_write_i)
------------1------------ ----2---- -----3-----
| -1- | -2- | -3- | Status | Tests |
|---|
| 0 | 1 | 1 | Not Covered | |
| 1 | 0 | 1 | Not Covered | |
| 1 | 1 | 0 | Not Covered | |
| 1 | 1 | 1 | Covered | T4,T5,T6 |
LINE 70
EXPRESSION (spi_req_i & ((!spi_write_i)))
----1---- --------2-------
| -1- | -2- | Status | Tests |
|---|
| 0 | 1 | Covered | T1,T2,T3 |
| 1 | 0 | Covered | T4,T11,T15 |
| 1 | 1 | Covered | T4,T5,T8 |
LINE 83
EXPRESSION (spi_req_i & spi_write_i)
----1---- -----2-----
| -1- | -2- | Status | Tests |
|---|
| 0 | 1 | Not Covered | |
| 1 | 0 | Covered | T4,T5,T8 |
| 1 | 1 | Covered | T4,T11,T15 |
LINE 91
EXPRESSION (sys_req_i & ((!sys_write_i)))
----1---- --------2-------
| -1- | -2- | Status | Tests |
|---|
| 0 | 1 | Covered | T1,T2,T3 |
| 1 | 0 | Covered | T4,T5,T6 |
| 1 | 1 | Covered | T4,T11,T15 |
LINE 108
EXPRESSION (spi2sys_wr_req && ((!initialized_words_q[7'(spi2sys_wr_addr)])))
-------1------ ----------------------2----------------------
| -1- | -2- | Status | Tests |
|---|
| 0 | 1 | Covered | T1,T2,T3 |
| 1 | 0 | Covered | T4,T11,T15 |
| 1 | 1 | Covered | T4,T11,T15 |
Branch Coverage for Module :
spid_dpram
| Line No. | Total | Covered | Percent |
| Branches |
|
4 |
4 |
100.00 |
| IF |
108 |
2 |
2 |
100.00 |
| IF |
118 |
2 |
2 |
100.00 |
108 if (spi2sys_wr_req && !initialized_words_q[Spi2SysAw'(spi2sys_wr_addr)]) begin
-1-
109 // Mask data at this point already and set all masked bits to 0.
110 spi_wdata = spi_wdata_i & spi_wmask_i;
==>
111 spi_wmask = {SramDw{1'b1}};
112 // Mark this word as initialized
113 initialized_words_d[Spi2SysAw'(spi2sys_wr_addr)] = 1'b1;
114 end
MISSING_ELSE
==>
Branches:
| -1- | Status | Tests |
| 1 |
Covered |
T4,T11,T15 |
| 0 |
Covered |
T1,T2,T3 |
118 if (!rst_spi_ni) begin
-1-
119 initialized_words_q <= '0;
==>
120 end else begin
121 initialized_words_q <= initialized_words_d;
==>
Branches:
| -1- | Status | Tests |
| 1 |
Covered |
T1,T2,T3 |
| 0 |
Covered |
T3,T4,T5 |