github-mirrors/cve2
1
0
Fork 0
mirror of https://github.com/openhwgroup/cve2.git synced 2025-04-24 14:09:08 -04:00
Code Issues Projects Releases Packages Wiki Activity Actions

[rtl/icache] Make age matrix more consistent

Browse source 
The design currently relies on fill_done remaining set in the cycle
after the fill buffer completes to ensure the fill_older_q entry gets
cleared (when a fill buffer completes in the same cycle that one is
allocated). This fix makes the behaviour a bit more consistent and easy
to reason about.
This commit is contained in:
Tom Roberts 2020-03-16 11:07:07 +00:00 • committed by Tom Roberts
parent e03aeb1f4f
commit 854faeda39
1 changed files with 1 additions and 1 deletions
Download patch file Download diff file Expand all files Collapse all files

2
rtl/ibex_icache.sv
View file

@ -420,7 +420,7 @@ module ibex_icache #(
// Track which other fill buffers are older than this one (for age-based arbitration)
// TODO sparsify
assign fill_older_d[fb] = fill_alloc[fb] ? fill_busy_q : (fill_older_q[fb] & ~fill_done);
assign fill_older_d[fb] = (fill_alloc[fb] ? fill_busy_q : fill_older_q[fb]) & ~fill_done;
// A fill buffer can release once all its actions are completed
// all data written to the cache (unless hit or error)