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qemu armv7

This commit is contained in:
Daniel Barlow 2023-11-05 20:56:25 +00:00
parent c94d12934f
commit 6489a39424
4 changed files with 96 additions and 1 deletions

2
ci.nix
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@ -9,7 +9,7 @@ let
borderVmConf = ./bordervm.conf-example.nix;
inherit (pkgs.lib.attrsets) genAttrs;
devices = {
virt = [ "qemu" "qemu-aarch64" ];
virt = [ "qemu" "qemu-aarch64" "qemu-armv7l" ];
hw = [ "gl-ar750" "gl-mt300n-v2" "gl-mt300a" ];
};
vanilla = ./vanilla-configuration.nix;

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@ -0,0 +1,78 @@
# This "device" generates images that can be used with the QEMU
# emulator. The default output is a directory containing separate
# kernel ("Image" format) and root filesystem (squashfs or jffs2)
# images
{
system = {
crossSystem = {
config = "armv7l-unknown-linux-musleabihf";
};
};
# this device is described by the "qemu" device
description = "";
module = {pkgs, config, ... }: {
imports = [ ../../modules/arch/arm.nix ];
kernel = {
src = pkgs.pkgsBuildBuild.fetchurl {
name = "linux.tar.gz";
url = "https://cdn.kernel.org/pub/linux/kernel/v5.x/linux-5.15.71.tar.gz";
hash = "sha256-yhO2cXIeIgUxkSZf/4aAsF11uxyh+UUZu6D1h92vCD8=";
};
config = {
PCI_HOST_GENERIC = "y";
PCI = "y";
ARCH_VIRT = "y";
VFP = "y";
NEON = "y";
AEABI = "y";
MTD = "y";
MTD_BLOCK = "y";
MTD_CMDLINE_PARTS = "y";
MTD_PHRAM = "y";
VIRTIO_MENU = "y";
VIRTIO_PCI = "y";
BLOCK = "y";
VIRTIO_BLK = "y";
VIRTIO_NET = "y";
SERIAL_EARLYCON_ARM_SEMIHOST = "y"; # earlycon=smh
SERIAL_AMBA_PL011 = "y";
SERIAL_AMBA_PL011_CONSOLE = "y";
};
};
boot.commandLine = [
"console=ttyAMA0"
];
hardware =
let
mac80211 = pkgs.mac80211.override {
drivers = ["mac80211_hwsim"];
klibBuild = config.system.outputs.kernel.modulesupport;
};
in {
defaultOutput = "vmroot";
loadAddress = "0x00010000";
entryPoint = "0x00010000";
rootDevice = "/dev/mtdblock0";
flash.eraseBlockSize = "65536"; # c.f. pkgs/mips-vm/mips-vm.sh
networkInterfaces =
let inherit (config.system.service.network) link;
in {
wan = link.build { ifname = "eth0"; };
lan = link.build { ifname = "eth1"; };
wlan_24 = link.build {
ifname = "wlan0";
dependencies = [ mac80211 ];
};
};
};
};
}

9
modules/arch/arm.nix Normal file
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@ -0,0 +1,9 @@
{ lib, lim, pkgs, config, ...}:
{
config = {
kernel.config = {
OF = "y";
};
hardware.ram.startAddress = lim.parseInt "0x40000000";
};
}

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@ -52,6 +52,14 @@ case "$arch" in
aarch64)
QEMU="qemu-system-aarch64 -M virt -semihosting -cpu cortex-a72"
;;
arm)
# https://bugs.launchpad.net/qemu/+bug/1790975
QEMU="qemu-system-arm -M virt,highmem=off -cpu cortex-a15"
;;
*)
echo "unrecognised arch $arch"
exit 1;
;;
esac
phram="mtdparts=phram0:16M(rootfs) phram.phram=phram0,${PHRAM_ADDRESS},16Mi,65536 root=/dev/mtdblock0";