[dv/hmac] packer updates
According to the changes on PR #3065, packer can hold one 32 bits
data during hmac msg stream in.
However, hmac DV scb previously assumes after hmac_progress, no more
data can be read from the fifo except the leftover unfinished bytes
(less than a word).
This PR updates the SCB to allow wr_cnter to increment by checking if
the msg_size is larger than the wr_cnter.
Signed-off-by: Cindy Chen <chencindy@google.com>
diff --git a/hw/ip/hmac/dv/env/hmac_scoreboard.sv b/hw/ip/hmac/dv/env/hmac_scoreboard.sv
index ddf19de..b93741e 100644
--- a/hw/ip/hmac/dv/env/hmac_scoreboard.sv
+++ b/hw/ip/hmac/dv/env/hmac_scoreboard.sv
@@ -254,8 +254,11 @@
begin : increase_wr_cnt
bit has_unprocessed_msg = 1;
wait(msg_q.size() >= (hmac_wr_cnt + 1) * 4 || (hmac_process && msg_q.size() > 0));
+ // if hmac process is issued and there are still unprocessed word (can hold up to at
+ // most one word), then the hmac_wr_cnt will increment
+ // if all the written msgs have been process, will skip the counter incrementation
if (hmac_process) begin
- has_unprocessed_msg = msg_q.size() % 4 != 0;
+ if (msg_q.size() <= hmac_wr_cnt * 4) has_unprocessed_msg = 0;
msg_q.delete();
end
if (sha_en && has_unprocessed_msg) begin
