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feat: aarch64 port - Raspberry Pi 4/400 SD boot (SDHCI, ext2 root + first-boot grow), USB hubs, PCI INTx routing, SMP, DMA fences

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daniel committed 2026-10-25 13:48:26 +01:00
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commit 808e1d66fd
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GNUmakefile
+58 -6
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@@ -77,7 +77,10 @@ run-hdd-x86_64: $(IMAGE_NAME).hdd
$(QEMUFLAGS)
.PHONY: run-aarch64
# The machine mirrors the Raspberry Pi 4/400: Cortex-A72 cores and a GICv2.
# The machine mirrors the Raspberry Pi 4/400: Cortex-A72 cores, a GICv2, and
# keyboard and mouse behind a hub (every USB 2 device on the Pi is: the
# VL805's one USB 2 port carries an on-board hub). QEMU's hub is full-speed,
# so the transaction-translator path is only exercised on the real board.
# The kernel console is mirrored to the PL011 (-serial stdio).
run-aarch64: $(IMAGE_NAME).iso
qemu-system-$(ARCH) \
@@ -85,8 +88,9 @@ run-aarch64: $(IMAGE_NAME).iso
-cpu cortex-a72 \
-device ramfb \
-device qemu-xhci,id=xhci \
-device usb-kbd,bus=xhci.0 \
-device usb-mouse,bus=xhci.0 \
-device usb-hub,bus=xhci.0,port=1 \
-device usb-kbd,bus=xhci.0,port=1.1 \
-device usb-mouse,bus=xhci.0,port=1.2 \
-bios $(AARCH64_EFI_FIRMWARE) \
-cdrom $(IMAGE_NAME).iso \
-serial stdio \
@@ -99,14 +103,48 @@ run-hdd-aarch64: $(IMAGE_NAME).hdd
-cpu cortex-a72 \
-device ramfb \
-device qemu-xhci,id=xhci \
-device usb-kbd,bus=xhci.0 \
-device usb-mouse,bus=xhci.0 \
-device usb-hub,bus=xhci.0,port=1 \
-device usb-kbd,bus=xhci.0,port=1.1 \
-device usb-mouse,bus=xhci.0,port=1.2 \
-bios $(AARCH64_EFI_FIRMWARE) \
-drive if=none,id=hd0,format=raw,file=$(IMAGE_NAME).hdd \
-device virtio-blk-pci,drive=hd0 \
-serial stdio \
$(QEMUFLAGS)
# The SD card image on QEMU, with the root read through the SDHCI driver:
# the card goes on sdhci-pci as a padded copy (QEMU wants a power-of-two card;
# RPI4_QEMU_CARD_MIB, default 4 GiB, leaves the first-boot grow room to work
# with; every run starts from a fresh copy, so every run is a first boot),
# and since QEMU's UEFI has no SD driver, the card's ESP is also
# attached alone (the card's first partition, as its own disk) over virtio
# for the firmware to boot Limine from.
RPI4_QEMU_CARD_MIB ?= 4096
.PHONY: run-rpi4-sd
run-rpi4-sd: montauk-rpi4.img
cp --sparse=always montauk-rpi4.img rpi4-sd-qemu.img
size=$$(stat -c %s rpi4-sd-qemu.img); p=$$(($(RPI4_QEMU_CARD_MIB) * 1048576)); \
while [ $$p -lt $$size ]; do p=$$((p * 2)); done; truncate -s $$p rpi4-sd-qemu.img
end=$$(PATH=$$PATH:/usr/sbin:/sbin sfdisk -d montauk-rpi4.img | awk -F'[=,]' '/montauk-rpi4.img1/ {print $$2 + $$4}'); \
dd if=montauk-rpi4.img of=rpi4-esp-qemu.img bs=512 count=$$end status=none
PATH=$$PATH:/usr/sbin:/sbin sfdisk --quiet --delete rpi4-esp-qemu.img 2 2>/dev/null || true
qemu-system-aarch64 \
-M virt,gic-version=2 \
-cpu cortex-a72 \
-device ramfb \
-device qemu-xhci,id=xhci \
-device usb-hub,bus=xhci.0,port=1 \
-device usb-kbd,bus=xhci.0,port=1.1 \
-device usb-mouse,bus=xhci.0,port=1.2 \
-bios $(AARCH64_EFI_FIRMWARE) \
-drive if=none,id=esp,format=raw,file=rpi4-esp-qemu.img \
-device virtio-blk-pci,drive=esp \
-device sdhci-pci \
-drive if=none,id=sd,format=raw,file=rpi4-sd-qemu.img \
-device sd-card,drive=sd \
-serial stdio \
$(QEMUFLAGS)
.PHONY: run-riscv64
run-riscv64: $(IMAGE_NAME).iso
qemu-system-$(ARCH) \
@@ -377,6 +415,20 @@ ifeq ($(ARCH),loongarch64)
endif
rm -rf iso_root
# Raspberry Pi 4/400 SD card image (UEFI firmware + Limine + MontaukOS).
# ROOTFS=ext2 (default) puts the system on an ext2 partition read through the
# kernel's SD driver; ROOTFS=ramdisk has Limine load ramdisk.tar instead.
# Phony so switching ROOTFS always rebuilds the image.
ROOTFS ?= ext2
.PHONY: rpi4-sd montauk-rpi4.img
rpi4-sd: montauk-rpi4.img
montauk-rpi4.img: limine/limine kernel ramdisk
ifneq ($(ARCH),aarch64)
$(error rpi4-sd needs ARCH=aarch64)
endif
./scripts/mk-rpi4-sd.sh kernel/bin-$(ARCH)/kernel ramdisk.tar $@ $(ROOTFS) $(PROGRAMS_BIN)-rpi
$(IMAGE_NAME).hdd: limine/limine kernel ramdisk
rm -f $(IMAGE_NAME).hdd
dd if=/dev/zero bs=1M count=0 seek=64 of=$(IMAGE_NAME).hdd
@@ -408,7 +460,7 @@ endif
clean:
$(MAKE) -C kernel clean
# $(MAKE) -C programs clean
rm -rf iso_root .release-tmp $(IMAGE_NAME).iso $(IMAGE_NAME).hdd ramdisk.tar
rm -rf iso_root .release-tmp $(IMAGE_NAME).iso $(IMAGE_NAME).hdd montauk-rpi4.img rpi4-sd-qemu.img rpi4-esp-qemu.img ramdisk.tar
.PHONY: distclean
distclean: