From 5202bce32bd9157508ed48da37e114b7ade0ec70 Mon Sep 17 00:00:00 2001 From: Alejandro Soto Date: Wed, 25 Oct 2023 19:13:19 -0600 Subject: rtl/gfx: implement skid buffers --- rtl/gfx/skid_flow.sv | 31 +++++++++++++++++++++++++++++++ 1 file changed, 31 insertions(+) create mode 100644 rtl/gfx/skid_flow.sv (limited to 'rtl/gfx/skid_flow.sv') diff --git a/rtl/gfx/skid_flow.sv b/rtl/gfx/skid_flow.sv new file mode 100644 index 0000000..a38df65 --- /dev/null +++ b/rtl/gfx/skid_flow.sv @@ -0,0 +1,31 @@ +module skid_flow +( + input logic clk, + rst_n, + + input logic in_valid, + out_ready, + + output logic in_ready, + out_valid, + stall +); + + logic was_ready, was_valid; + + assign stall = !in_ready; + assign in_ready = was_ready || !was_valid; + assign out_valid = in_valid || was_valid; + + always @(posedge clk or negedge rst_n) + if (!rst_n) begin + was_ready <= 0; + was_valid <= 0; + end else begin + was_ready <= out_ready; + + if (!stall) + was_valid <= in_valid; + end + +endmodule -- cgit v1.2.3