Preparing Environment

GNU toolchain

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$ mkdir -p /opt/riscv/bin ~/riscv
$ echo 'export RISCV=/opt/riscv' >> ~/.zshrc
$ echo 'export PATH=$PATH:$RISCV/bin' >> ~/.zshrc
$ sudo apt install git autoconf automake autotools-dev curl python3 libmpc-dev libmpfr-dev libgmp-dev gawk build-essential bison flex texinfo gperf libtool patchutils bc zlib1g-dev libexpat1-dev ninja-build
$ cd ~/riscv
$ git clone --recurse-submodules -j8 --depth 1 https://github.com/riscv/riscv-gnu-toolchain

https://stackoverflow.com/questions/2144406/how-to-make-shallow-git-submodules 這裡因為如果在 make 時再去抓 submodule 好像會怪怪的

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$ cd riscv-gnu-toolchain
$ ./configure --prefix=$RISCV --enable-multilib

執行這步之前要先去每個 submodule 下指令 git reset HEAD --hard，應該可以修改 git clone 指令做到，但懶得重試了

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$ sudo make linux -j4

這步驟要編很久

其他工具

其他工具包含 spike、proxy kernel，這兩個編譯方式都一樣

spike

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$ cd ~/riscv
$ sudo apt-get install device-tree-compiler
$ git clone --depth 1 https://github.com/riscv/riscv-isa-sim.git
$ cd riscv-isa-sim
$ mkdir build
$ cd build
$ ../configure --prefix=$RISCV
$ make
$ sudo make install

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$ cd ~/riscv
$ git clone https://github.com/riscv/riscv-pk.git
$ cd riscv-pk
$ mkdir build
$ cd build
$ ../configure --prefix=$RISCV --host=riscv64-unknown-linux-gnu
$ make
$ sudo make install

測試

GNU toolchain

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$ riscv64-unknown-linux-gnu-gcc -v

others tool

/tmp/hello.c

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#include <stdio.h>

int main(){
	printf("hello world");
	return 0;
}

執行

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$ riscv64-unknown-linux-gnu-gcc -static -o /tmp/hello /tmp/hello.c
$ spike --isa=RV64GC $RISCV/riscv64-unknown-linux-gnu/bin/pk /tmp/hello

參考資料

上課 Homework 0 講義