Add initial NixOS expression for boot image

1 files changed, 39 insertions, 0 deletions

diff --git a/nix/sd-card.nix b/nix/sd-card.nix
new file mode 100644
index 0000000..d2faea8
--- /dev/null
+++ b/nix/sd-card.nix
@@ -0,0 +1,39 @@
+{ ... }: {
+  nixpkgs = {
+    config.allowUnsupportedSystem = true;
+
+    crossSystem = {
+      config = "armv4-unknown-linux-gnueabi";
+
+      gcc = {
+        # > Switch "--with-arch" may not be used with switch "--with-cpu"
+        # > make[1]: *** [Makefile:4315: configure-gcc] Error 1
+        #arch = "armv4";
+
+        # Ver SA110 en arch/arm/mm/Kconfig, es parecido 
+        cpu = "arm810";
+      };
+
+      linux-kernel = {
+        name = "taller";
+        target = "uImage";
+        makeFlags = [ "LOADADDR=0x01000000" ];
+        autoModules = false;
+        # Esto es solo para construir el toplevel del system
+        baseConfig = "multi_v5_defconfig"; # "multi_v4_defconfig";
+      };
+    };
+  };
+
+  system.stateVersion = "22.11";
+
+  fileSystems."/" = {
+    device = "tmpfs";
+    fsType = "tmpfs";
+  };
+
+  boot.loader = {
+    grub.enable = false;
+    generic-extlinux-compatible.enable = true;
+  };
+}