55 lines
1.3 KiB
Nix
55 lines
1.3 KiB
Nix
# This "device" generates images that can be used with the QEMU
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# emulator. The default output is a directory containing separate
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# kernel (uncompressed vmlinux) and initrd (squashfs) images
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{
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system = {
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crossSystem = {
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config = "mips-unknown-linux-musl";
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gcc = {
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abi = "32";
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arch = "mips32"; # maybe mips_24kc-
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};
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};
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};
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overlay = final: prev:
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let inherit (final) stdenvNoCC fetchFromGitHub;
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in {
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kernel = prev.kernel.override {
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# using fetchurl not fetchzip because it doesn't unpack, and
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# copying 6GB of data from one store location to another
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# takes an absolute bloody age
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src = final.fetchurl {
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name = "linux.tar.gz";
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url = "https://cdn.kernel.org/pub/linux/kernel/v5.x/linux-5.19.16.tar.gz";
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hash = "sha256-m4NeoEsCEK0HSIKTZ6zYTgk1fD3W0PSOMXN6fyHpkP8=";
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};
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};
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};
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kernel = {
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config = {
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MIPS_MALTA= "y";
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CPU_LITTLE_ENDIAN= "n";
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CPU_BIG_ENDIAN= "y";
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CPU_MIPS32_R2= "y";
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SQUASHFS = "y";
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SQUASHFS_XZ = "y";
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VIRTIO_MENU = "y";
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PCI = "y";
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VIRTIO_PCI = "y";
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BLOCK = "y";
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VIRTIO_BLK = "y";
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NETDEVICES = "y";
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VIRTIO_NET = "y";
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SERIAL_8250= "y";
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SERIAL_8250_CONSOLE= "y";
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};
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};
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outputs.default = "directory";
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}
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