From 62b2318035adf61a3418c635a24d179b62bca66c Mon Sep 17 00:00:00 2001
From: "John W. Terrell" <john@coolpeople.io>
Date: Thu, 18 Sep 2025 15:10:42 -0700
Subject: [PATCH] Added Makefile support

---
 Makefile               | 14 ++++++++++++++
 shell.nix              | 21 +++++++++++++++++++++
 src/Cpu/CSRs/module.mk |  8 ++++++++
 src/Cpu/module.mk      | 11 +++++++++++
 src/Memory/module.mk   |  8 ++++++++
 src/Util/module.mk     |  8 ++++++++
 src/module.mk          | 17 +++++++++++++++++
 7 files changed, 87 insertions(+)
 create mode 100644 Makefile
 create mode 100644 shell.nix
 create mode 100644 src/Cpu/CSRs/module.mk
 create mode 100644 src/Cpu/module.mk
 create mode 100644 src/Memory/module.mk
 create mode 100644 src/Util/module.mk
 create mode 100644 src/module.mk

diff --git a/Makefile b/Makefile
new file mode 100644
index 0000000..487a6fc
--- /dev/null
+++ b/Makefile
@@ -0,0 +1,14 @@
+SRCDIRS :=
+empty:=
+space:=$(empty) $(empty)
+
+dir := src
+include $(dir)/module.mk
+
+all: sim
+
+sim_output_location:
+	mkdir -p build/sim/
+
+sim: sim_output_location
+	bsc -u -p $(subst $(space):,:,$(SRCDIRS)) src/ESeries.bsv
diff --git a/shell.nix b/shell.nix
new file mode 100644
index 0000000..ec508ff
--- /dev/null
+++ b/shell.nix
@@ -0,0 +1,21 @@
+let
+  nixpkgs = fetchTarball "https://github.com/NixOS/nixpkgs/tarball/nixos-25.05";
+  pkgs = import nixpkgs { config = {}; overlays = []; };
+in
+pkgs.mkShell {
+  # Dependencies that only exist in the build environment
+  nativeBuildInputs = with pkgs; [
+    bluespec
+    clang   # for clang-format
+  ];
+
+  # Dependencies that only exist in the runtime environment
+  buildInputs = with pkgs; [
+  ];
+
+  shellHook =
+    ''
+      # This provides git an email address for commits
+      export EMAIL="john@coolpeople.io"
+    '';
+}
diff --git a/src/Cpu/CSRs/module.mk b/src/Cpu/CSRs/module.mk
new file mode 100644
index 0000000..28c2c6f
--- /dev/null
+++ b/src/Cpu/CSRs/module.mk
@@ -0,0 +1,8 @@
+sp := $(sp).x
+dirstack_$(sp) := $(d)
+d := $(dir)
+
+SRCDIRS+=:$(d)
+
+d := $(dirstack_$(sp))
+sp := $(basename $(sp))
diff --git a/src/Cpu/module.mk b/src/Cpu/module.mk
new file mode 100644
index 0000000..6b582e7
--- /dev/null
+++ b/src/Cpu/module.mk
@@ -0,0 +1,11 @@
+sp := $(sp).x
+dirstack_$(sp) := $(d)
+d := $(dir)
+
+SRCDIRS+=:$(d)
+
+dir := $(d)/CSRs
+include $(dir)/module.mk
+
+d := $(dirstack_$(sp))
+sp := $(basename $(sp))
diff --git a/src/Memory/module.mk b/src/Memory/module.mk
new file mode 100644
index 0000000..28c2c6f
--- /dev/null
+++ b/src/Memory/module.mk
@@ -0,0 +1,8 @@
+sp := $(sp).x
+dirstack_$(sp) := $(d)
+d := $(dir)
+
+SRCDIRS+=:$(d)
+
+d := $(dirstack_$(sp))
+sp := $(basename $(sp))
diff --git a/src/Util/module.mk b/src/Util/module.mk
new file mode 100644
index 0000000..28c2c6f
--- /dev/null
+++ b/src/Util/module.mk
@@ -0,0 +1,8 @@
+sp := $(sp).x
+dirstack_$(sp) := $(d)
+d := $(dir)
+
+SRCDIRS+=:$(d)
+
+d := $(dirstack_$(sp))
+sp := $(basename $(sp))
diff --git a/src/module.mk b/src/module.mk
new file mode 100644
index 0000000..b85b16c
--- /dev/null
+++ b/src/module.mk
@@ -0,0 +1,17 @@
+sp := $(sp).x
+dirstack_$(sp) := $(d)
+d := $(dir)
+
+SRCDIRS+=:$(d)
+
+dir := $(d)/Cpu
+include $(dir)/module.mk
+
+dir := $(d)/Memory
+include $(dir)/module.mk
+
+dir := $(d)/Util
+include $(dir)/module.mk
+
+d := $(dirstack_$(sp))
+sp := $(basename $(sp))