github-mirrors/cva6
1
0
Fork 0
mirror of https://github.com/openhwgroup/cva6.git synced 2025-04-22 13:17:41 -04:00
Code Issues Projects Releases Packages Wiki Activity Actions 5

miss_handler: Direct transition from FLUSH to AMO (#1679)

Browse source
This commit is contained in:
Nils Wistoff 2023-12-06 17:53:57 +01:00 • committed by GitHub
parent 683e5e8494
commit c0a30e1c85
No known key found for this signature in database
GPG key ID: 4AEE18F83AFDEB23
1 changed files with 10 additions and 10 deletions
Download patch file Download diff file Expand all files Collapse all files

20
core/cache_subsystem/miss_handler.sv
View file

@ -205,15 +205,9 @@ module miss_handler
// lowest priority are AMOs, wait until everything else is served before going for the AMOs
if (amo_req_i.req && !busy_i) begin
// 1. Flush the cache
if (!serve_amo_q) begin
state_d = FLUSH_REQ_STATUS;
serve_amo_d = 1'b1;
cnt_d = '0;
// 2. Do the AMO
end else begin
state_d = AMO_REQ;
serve_amo_d = 1'b0;
end
state_d = FLUSH_REQ_STATUS;
serve_amo_d = 1'b1;
cnt_d = '0;
end
// check if we want to flush and can flush e.g.: we are not busy anymore
// TODO: Check that the busy flag is indeed needed
@ -380,7 +374,13 @@ module miss_handler
if (cnt_q[DCACHE_INDEX_WIDTH-1:DCACHE_BYTE_OFFSET] == DCACHE_NUM_WORDS - 1) begin
// only acknowledge if the flush wasn't triggered by an atomic
flush_ack_o = ~serve_amo_q;
state_d = IDLE;
// if we are flushing because of an AMO go to serve it
if (serve_amo_q) begin
state_d = AMO_REQ;
serve_amo_d = 1'b0;
end else begin
state_d = IDLE;
end
end
end
end