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/VX_csr_io_arb.v
+++ b/hw/rtl/VX_csr_io_arb.v
@@ -60,7 +60,7 @@ module VX_csr_io_arb #(
            .grant_onehot (rsp_1hot)
        );   

-        wire stall = csr_io_rsp_valid_out && ~csr_io_rsp_ready_out;
+        wire stall = ~csr_io_rsp_ready_out && csr_io_rsp_valid_out;

        VX_generic_register #(
            .N(1 + 32),