[rom_ctrl, fpga] Add ROM init in fpga bit file

 * FPGA tests need ROM initialization to pass
 * RomInitFile argument and init file paths added to the
   nix/fpga.nix script

Author: KolosKoblasz-Semify

hw/top_chip/chip_mocha_genesys2.core

@@ -40,6 +40,12 @@ parameters:
     default: ""
     paramtype: vlogparam
 
+  RomInitFile:
+    datatype: str
+    description: ROM initialization file in 32 bit vmem hex format
+    default: ""
+    paramtype: vlogparam
+
 targets:
   default: &default_target
     filesets:
@@ -54,6 +60,7 @@ targets:
     toplevel: chip_mocha_genesys2
     parameters:
       - BootRomInitFile
+      - RomInitFile
     tools:
       vivado:
         part: "xc7k325tffg900-2" # Genesys 2 with K325T

hw/top_chip/rtl/chip_mocha_genesys2.sv

@@ -3,7 +3,8 @@
 // SPDX-License-Identifier: Apache-2.0
 
 module chip_mocha_genesys2 #(
-  parameter BootRomInitFile = ""
+  parameter BootRomInitFile = "",
+  parameter RomInitFile     = ""
 ) (
   // Onboard 200MHz oscillator
   input  logic sysclk_200m_ni,
@@ -146,7 +147,8 @@ module chip_mocha_genesys2 #(
 
   // CHERI Mocha top
   top_chip_system #(
-    .SramInitFile(BootRomInitFile)
+    .SramInitFile(BootRomInitFile),
+    .RomInitFile(RomInitFile)
   ) u_top_chip_system (
     // Clock and reset
     .clk_i    (clk_50m),

nix/fpga.nix

@@ -8,14 +8,15 @@
 }: let
   bitstream_path = "build/lowrisc_mocha_chip_mocha_genesys2_0/synth-vivado";
   bootrom_path = "build/sw/device/bootrom";
+  rom_init_path = "sw/device/tests/rom_ctrl";
 in {
   bitstream-hash = pkgs.writeShellApplication {
     name = "bitstream-hash";
     runtimeInputs = [pythonEnv llvm pkgs.gnumake pkgs.cmake pkgs.srecord];
     text = ''
       # Ask fusesoc to evaluate and generate the dependencies list.
       fusesoc --cores-root=. run --target=synth --setup lowrisc:mocha:chip_mocha_genesys2 > /dev/null 2>&1
-      
+
       # Build the bootROM because it's cheap, and copy the vmem to the src to be hashed.
       cmake -DCMAKE_BUILD_TYPE=Release -B build/sw -S sw  > /dev/null 2>&1
       cmake --build build/sw --target bootrom > /dev/null 2>&1
@@ -35,7 +36,8 @@ in {
 
       fusesoc --cores-root=. run --target=synth --setup \
         --build lowrisc:mocha:chip_mocha_genesys2 \
-        --BootRomInitFile="$PWD/${bootrom_path}/bootrom.vmem"
+        --BootRomInitFile="$PWD/${bootrom_path}/bootrom.vmem" \
+        --RomInitFile="$PWD/${rom_init_path}/mem_init_file.vmem"
     '';
   };