Add package for ibex-cosim

pkgs/default.nix

@@ -12,6 +12,8 @@
   verilator_ot = import ./verilator {inherit pkgs;};
   python_ot = pkgs.callPackage ./python_ot {inherit inputs;};
   bazel_ot = pkgs.callPackage ./bazel_ot {};
+
+  ibex-cosim = pkgs.callPackage ./ibex-cosim.nix {};
 }
 // pkgs.lib.optionalAttrs (pkgs.system == "x86_64-linux") {
   lowrisc-toolchain-gcc-rv32imcb = pkgs.callPackage ./lowrisc-toolchain-gcc-rv32imcb.nix {};

pkgs/ibex-cosim.nix

@@ -0,0 +1,28 @@
+{
+  fetchFromGitHub,
+  stdenv,
+  dtc,
+}:
+stdenv.mkDerivation rec {
+  pname = "ibex-cosim";
+  version = "15fbd56";
+
+  src = fetchFromGitHub {
+    owner = "lowRISC";
+    repo = "riscv-isa-sim";
+    # branch ibex_cosim
+    rev = "15fbd5680e44da699f828c67db15345822a47ef6";
+    hash = "sha256-LK/IXmRHrGxaMRudcUYmeZV5eXU8eH7ruIw7kliumdY=";
+  };
+
+  nativeBuildInputs = [
+    dtc
+  ];
+
+  configureFlags = [
+    "--enable-commitlog"
+    "--enable-misaligned"
+  ];
+
+  enableParallelBuilding = true;
+}