github-mirrors/cva6
1
0
Fork 0
mirror of https://github.com/openhwgroup/cva6.git synced 2025-04-24 22:27:10 -04:00
Code Issues Projects Releases Packages Wiki Activity Actions 1

commit_stage: Remove duplicate fence logic (#292)

Browse source
This commit is contained in:
Nils Wistoff 2019-08-12 10:22:01 +02:00 • committed by Florian Zaruba
parent 045d706cde
commit 97801afe83
1 changed files with 0 additions and 28 deletions
Download patch file Download diff file Expand all files Collapse all files

28
src/commit_stage.sv
View file

@ -206,34 +206,6 @@ module commit_stage #(
fence_o = no_st_pending_i; fence_o = no_st_pending_i;
end end
// ------------------ // ------------------
// SFENCE.VMA Logic
// ------------------
// check if this instruction was a SFENCE_VMA
if (commit_instr_i[0].op == SFENCE_VMA) begin
// no store pending so we can flush the TLBs and pipeline
sfence_vma_o = no_st_pending_i;
// wait for the store buffer to drain until flushing the pipeline
commit_ack_o[0] = no_st_pending_i;
end
// ------------------
// FENCE.I Logic
// ------------------
// Fence synchronizes data and instruction streams. That means that we need to flush the private icache
// and the private dcache. This is the most expensive instruction.
if (commit_instr_i[0].op == FENCE_I || (flush_dcache_i && commit_instr_i[0].fu != STORE)) begin
commit_ack_o[0] = no_st_pending_i;
// tell the controller to flush the I$
fence_i_o = no_st_pending_i;
end
// ------------------
// FENCE Logic
// ------------------
if (commit_instr_i[0].op == FENCE) begin
commit_ack_o[0] = no_st_pending_i;
// tell the controller to flush the D$
fence_o = no_st_pending_i;
end
// ------------------
// AMO // AMO
// ------------------ // ------------------
if (RVA && instr_0_is_amo) begin if (RVA && instr_0_is_amo) begin