Daniel Barlow
7e2b0068e6
There is nothing in this commit except for the changes made by nix-shell -p nixfmt-rfc-style --run "nixfmt ." If this has mucked up your open branches then sorry about that. You can probably nixfmt them to match before merging
86 lines
2.4 KiB
Nix
86 lines
2.4 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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description = ''
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QEMU MIPS
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*********
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This target produces an image for
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QEMU, the "generic and open source machine emulator and
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virtualizer".
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MIPS QEMU emulates a "Malta" board, which was an ATX form factor
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evaluation board made by MIPS Technologies, but mostly in Liminix
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we use paravirtualized devices (Virtio) instead of emulating
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hardware.
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Building an image for QEMU results in a :file:`result/` directory
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containing ``run.sh`` ``vmlinux``, and ``rootfs`` files. To invoke
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the emulator, run ``run.sh``.
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The configuration includes two emulated "hardware" ethernet
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devices and the kernel :code:`mac80211_hwsim` module to
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provide an emulated wlan device. To read more about how
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to connect to this network, refer to :ref:`qemu-networking`
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in the Development manual.
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'';
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module =
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{
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config,
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lib,
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lim,
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...
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}:
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{
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imports = [
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../../modules/arch/mipseb.nix
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../families/qemu.nix
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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_MIPS32_R2 = "y";
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POWER_RESET = "y";
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POWER_RESET_SYSCON = "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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hardware =
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# from arch/mips/mti-malta/Platform:load-$(CONFIG_MIPS_MALTA) += 0xffffffff80100000
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let
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addr = lim.parseInt "0x80100000";
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in
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{
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loadAddress = addr;
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entryPoint = addr;
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# Unlike the arm qemu targets, we need a static dts when
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# running u-boot-using tests, qemu dumpdtb command doesn't
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# work for this board. I am not at all sure this dts is
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# *correct* but it does at least boot
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dts = lib.mkForce {
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src = "${config.system.outputs.kernel.modulesupport}/arch/mips/boot/dts/mti/malta.dts";
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includePaths = [
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"${config.system.outputs.kernel.modulesupport}/arch/mips/boot/dts/"
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];
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};
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};
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};
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}
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