fixed DRAM response backpressure inside Cache

2020-11-10 05:24:57 -08:00
parent ed69be4027
commit 725322807e
19 changed files with 69 additions and 36 deletions
--- a/hw/rtl/cache/VX_snp_forwarder.v
+++ b/hw/rtl/cache/VX_snp_forwarder.v
@@ -109,7 +109,7 @@ module VX_snp_forwarder #(
            .grant_onehot (sel_1hot)
        );

-        wire stall = fwdin_valid && ~fwdin_ready;
+        wire stall = ~fwdin_ready && fwdin_valid;

        VX_generic_register #(
            .N(1 + `LOG2UP(SNRQ_SIZE)),