2022-06-06 15:42:51 +03:00
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- Introduction
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LoongArch is the general processor architecture of Loongson.
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The following versions of the LoongArch core are supported
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core: 3A5000
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https://github.com/loongson/LoongArch-Documentation/releases/download/2021.08.17/LoongArch-Vol1-v1.00-EN.pdf
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We can get the latest loongarch documents at https://github.com/loongson/LoongArch-Documentation/tags.
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2022-06-06 15:43:08 +03:00
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- System emulation
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Mainly emulate a virt 3A5000 board and ls7a bridge that is not exactly the same as the host.
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3A5000 support multiple interrupt cascading while here we just emulate the extioi interrupt
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cascading. LS7A1000 host bridge support multiple devices, such as sata, gmac, uart, rtc
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and so on. But we just realize the rtc. Others use the qemu common devices. It does not affect
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the general use. We also introduced the emulation of devices at docs/system/loongarch/loongson3.rst.
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This version only supports running binary files in ELF format, and does not depend on BIOS and kernel file.
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You can compile the test program with 'make & make check-tcg' and run the test case with the following command:
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1. Install LoongArch cross-tools on X86 machines.
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Download cross-tools.
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wget https://github.com/loongson/build-tools/releases/latest/download/loongarch64-clfs-20211202-cross-tools.tar.xz
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tar -vxf loongarch64-clfs-20211202-cross-tools.tar.xz -C /opt
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Config cross-tools env.
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. setenv.sh
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setenv.sh:
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#!/bin/sh
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set -x
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CC_PREFIX=/opt/cross-tools
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export PATH=$CC_PREFIX/bin:$PATH
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export LD_LIBRARY_PATH=$CC_PREFIX/lib:$LD_LIBRARY_PATH
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export LD_LIBRARY_PATH=$CC_PREFIX/loongarch64-unknown-linux-gnu/lib/:$LD_LIBRARY_PATH
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set +x
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2. Test tests/tcg/multiarch.
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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 --disable-werror \
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--enable-debug --disable-capstone --disable-kvm --enable-profiler
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cd build/
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make && make check-tcg
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or
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./build/qemu-system-loongarch64 -machine virt -m 4G -cpu Loongson-3A5000 -smp 1 -kernel build/tests/tcg/loongarch64-softmmu/hello -monitor none -display none -chardev file,path=hello.out,id=output -serial chardev:output
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- Note.
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We can get the latest LoongArch documents or LoongArch tools at https://github.com/loongson/
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