initial commit

1 files changed, 30 insertions, 0 deletions

diff --git a/core/rtl/ifu.sv b/core/rtl/ifu.sv
new file mode 100644
index 0000000..0eb3b1d
--- /dev/null
+++ b/core/rtl/ifu.sv
@@ -0,0 +1,30 @@
+module ifu
+  import riscv_types::*;
+(
+    input logic clk,
+    input logic rst_l,
+
+    // IMEM interface
+    output logic [31:0] if_imem_addr_IF
+);
+
+  logic [31:0] pc_IF;
+  logic [31:0] pcNxt_IF;
+
+  assign if_imem_addr_IF = pc_IF;  // Always fetch PC from IMEM, addresses are always 32 bit aligned
+                                   // TODO: Find out if 32 is the best fetching width vs 16
+
+  // Program Counter (PC)
+  assign pcNxt_IF = pc_IF + 32'd4;
+
+  AFFR #(
+      .WIDTH(32)
+  ) ff_IF_pc (
+      .q(pc_IF),
+      .d(pcNxt_IF),
+      .en(1'b1),
+      .clk(clk),
+      .rst_l(rst_l)
+  );
+
+endmodule