rtl: add axis iface

axi/rtl/axis_if_to_flat.sv

@@ -0,0 +1,30 @@
+module axis_if_to_flat #(
+  parameter int unsigned DATA_W = 64,
+  parameter int unsigned KEEP_W = DATA_W / 8,
+  parameter int unsigned ID_W   = 8,
+  parameter int unsigned DEST_W = 8,
+  parameter int unsigned USER_W = 1
+)(
+  axis_if.slave             s_axis,
+
+  output logic [DATA_W-1:0] m_axis_tdata,
+  output logic [KEEP_W-1:0] m_axis_tkeep,
+  output logic [KEEP_W-1:0] m_axis_tstrb,
+  output logic              m_axis_tlast,
+  output logic [ID_W-1:0]   m_axis_tid,
+  output logic [DEST_W-1:0] m_axis_tdest,
+  output logic [USER_W-1:0] m_axis_tuser,
+  output logic              m_axis_tvalid,
+  input  logic              m_axis_tready
+);
+  assign m_axis_tdata  = s_axis.req.t.data;
+  assign m_axis_tkeep  = s_axis.req.t.keep;
+  assign m_axis_tstrb  = s_axis.req.t.strb;
+  assign m_axis_tlast  = s_axis.req.t.last;
+  assign m_axis_tid    = s_axis.req.t.id;
+  assign m_axis_tdest  = s_axis.req.t.dest;
+  assign m_axis_tuser  = s_axis.req.t.user;
+  assign m_axis_tvalid = s_axis.req.t.valid;
+
+  assign s_axis.resp.ready = m_axis_tready;
+endmodule : axis_if_to_flat