5f4c96b779
Since the EDK2 had already support LoongArch, update build bios, and update cpu type, cross-tools. Reviewed-by: Richard Henderson <richard.henderson@linaro.org> Signed-off-by: Song Gao <gaosong@loongson.cn> Message-Id: <20230227035905.1290953-1-gaosong@loongson.cn>
109 lines
3.2 KiB
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109 lines
3.2 KiB
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==========================================
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loongson3 virt generic platform (``virt``)
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==========================================
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The ``virt`` machine use gpex host bridge, and there are some
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emulated devices on virt board, such as loongson7a RTC device,
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IOAPIC device, ACPI device and so on.
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Supported devices
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-----------------
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The ``virt`` machine supports:
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- Gpex host bridge
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- Ls7a RTC device
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- Ls7a IOAPIC device
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- ACPI GED device
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- Fw_cfg device
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- PCI/PCIe devices
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- Memory device
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- CPU device. Type: la464.
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CPU and machine Type
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--------------------
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The ``qemu-system-loongarch64`` provides emulation for virt
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machine. You can specify the machine type ``virt`` and
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cpu type ``la464``.
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Boot options
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------------
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We can boot the LoongArch virt machine by specifying the uefi bios,
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initrd, and linux kernel. And those source codes and binary files
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can be accessed by following steps.
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(1) Build qemu-system-loongarch64:
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.. code-block:: bash
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./configure --disable-rdma --disable-pvrdma --prefix=/usr \
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--target-list="loongarch64-softmmu" \
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--disable-libiscsi --disable-libnfs --disable-libpmem \
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--disable-glusterfs --enable-libusb --enable-usb-redir \
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--disable-opengl --disable-xen --enable-spice \
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--enable-debug --disable-capstone --disable-kvm \
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--enable-profiler
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make -j8
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(2) Set cross tools:
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.. code-block:: bash
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wget https://github.com/loongson/build-tools/releases/download/2022.09.06/loongarch64-clfs-6.3-cross-tools-gcc-glibc.tar.xz
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tar -vxf loongarch64-clfs-6.3-cross-tools-gcc-glibc.tar.xz -C /opt
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export PATH=/opt/cross-tools/bin:$PATH
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export LD_LIBRARY_PATH=/opt/cross-tools/lib:$LD_LIBRARY_PATH
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export LD_LIBRARY_PATH=/opt/cross-tools/loongarch64-unknown-linux-gnu/lib/:$LD_LIBRARY_PATH
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Note: You need get the latest cross-tools at https://github.com/loongson/build-tools
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(3) Build BIOS:
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See: https://github.com/tianocore/edk2-platforms/tree/master/Platform/Loongson/LoongArchQemuPkg#readme
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Note: To build the release version of the bios, set --buildtarget=RELEASE,
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the bios file path: Build/LoongArchQemu/RELEASE_GCC5/FV/QEMU_EFI.fd
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(4) Build kernel:
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.. code-block:: bash
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git clone https://github.com/loongson/linux.git
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cd linux
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git checkout loongarch-next
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make ARCH=loongarch CROSS_COMPILE=loongarch64-unknown-linux-gnu- loongson3_defconfig
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make ARCH=loongarch CROSS_COMPILE=loongarch64-unknown-linux-gnu- -j32
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Note: The branch of linux source code is loongarch-next.
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the kernel file: arch/loongarch/boot/vmlinuz.efi
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(5) Get initrd:
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You can use busybox tool and the linux modules to make a initrd file. Or you can access the
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binary files: https://github.com/yangxiaojuan-loongson/qemu-binary
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.. code-block:: bash
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git clone https://github.com/yangxiaojuan-loongson/qemu-binary
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Note: the initrd file is ramdisk
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(6) Booting LoongArch:
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.. code-block:: bash
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$ ./build/qemu-system-loongarch64 -machine virt -m 4G -cpu la464 \
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-smp 1 -bios QEMU_EFI.fd -kernel vmlinuz.efi -initrd ramdisk \
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-serial stdio -monitor telnet:localhost:4495,server,nowait \
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-append "root=/dev/ram rdinit=/sbin/init console=ttyS0,115200" \
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--nographic
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