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@@ -0,0 +1,417 @@
+# QEMU/RISCV64 环境配置搭建快速上手
+
+## 安装环境
+
+VMware Workstation Pro
+
+Ubuntu版本：24.06
+
+QEMU版本：8.2.2（最低需要6.2.0)
+
+网络部分：建议在搭建前提前配置好代理,主要是git和wget
+
+建议执行以下ubuntu的软件安装，确保已经有git等工具
+
+```
+sudo apt-get update
+sudo apt-get install git build-essential cmake
+```
+
+## 配置RT-Thread ENV环境
+
+### ENV工具简介
+RT-Thread推出的开发辅助工具env，是针对基于RT-Thread操作系统的项目工程提供编译构建环境、图形化系统配置以及软件包管理三大核心功能。
+
+其内置的menuconfig提供了简单易用的配置剪裁工具
+
+用户可以轻松对内核、组件和软件包进行自由裁剪，从而以搭积木的方式灵活构建系统。
+
+这一机制与Linux中的menuconfig源码配置方式类似，极大地简化了系统的定制化过程，提升了开发效率。
+
+### 下载安装
+
+```
+wget https://raw.githubusercontent.com/RT-Thread/env/master/install_ubuntu.sh
+chmod 777 install_ubuntu.sh
+./install_ubuntu.sh
+sudo apt install scons python3-kconfiglib python3-tqdm
+```
+
+安装完成后需要激活当前终端的环境变量，
+
+> 注意：激活的环境变量只对当前终端有效
+
+```
+source ~/.env/env.sh
+```
+
+> 如果需要在开启终端的时候自动激活，可以将这条命令放到~/.bashrc里，这样开启新终端的时候就会自动输入这条命令
+>
+> ENV仓库地址:[RT-Thread/env: Python Scripts for RT-Thread/ENV](https://github.com/RT-Thread/env)
+
+## 第一步：拉取仓库并配置工具链
+
+### 介绍仓库
+
+qemu-edu仓库主要用于板卡的适配工作，通过将RT-Thread内核以子模块的形式集成到项目中，实现了对不同板卡的支持与功能扩展。
+
+### 拉取仓库
+
+```
+cd ~
+git clone https://github.com/oscomp/RT-Thread
+cd qemu-edu
+git submodule update --init --force --recursive
+```
+
+git clone用于拉取仓库
+
+git submodule用于拉取RT-Thread内核仓库
+
+### 配置工具链
+
+下载对应的Smart工具链压缩包(此处的工具链仅供演示)
+
+来到拉取的仓库下的toolchains目录下，找到对应riscv的工具链，解压到/opt目录
+
+```
+cd toolchains/qemu-virt-riscv64
+sudo tar zxvf riscv64-linux-musleabi_for_x86_64-pc-linux-gnu_latest.tar.bz2 -C /opt
+```
+
+配置临时环境变量
+
+```
+export RTT_EXEC_PATH=/opt/riscv64gc-linux-musleabi_for_x86_64-pc-linux-gnu/bin
+export RTT_CC_PREFIX=riscv64-unknown-linux-musl-
+export PATH=/opt/riscv64gc-linux-musleabi_for_x86_64-pc-linux-gnu/bin:$PATH
+```
+
+验证下是否配置成功
+
+```
+riscv64-unknown-linux-musl-gcc --version
+```
+
+![image-20250321105730494](./QEMURISCV64-环境配置搭建.assets/image-20250321105730494.png)
+
+### 配置menuconfig组件和软件包
+
+#### RT-Thread Smart配置
+
+为了让内核能够支持运行挂载镜像上的脚本，这里需要开启RT-Thread Smart功能
+
+在终端输入scons --menuconfig打开图形化配置界面
+
+```
+source ~/.env/env.sh
+scons --menuconfig
+```
+
+上下键控制移动，空格确认打开，回车进入子菜单（如果有的话），ESC键返回
+
+找到RT-Thread Kernel选项进入可以看到对应的Enable RT-Thread Smart，按下空格看见有个星号即可
+
+![image-20250320175150469](./QEMURISCV64-环境配置搭建.assets/image-20250320175150469.png)
+
+按下ESC返回，直到退出的最后一步会询问你是否保存，按下Y即可保存
+
+#### 文件系统配置
+
+为了能支持ext4镜像，还需要打开对应的软件包,跟上述配置一样的操作
+
+如图第一排的是路径，按照该路径来到当前菜单
+
+随后选择lwext4软件包即可打开该软件包
+
+![image-20250320175511370](./QEMURISCV64-环境配置搭建.assets/image-20250320175511370.png)
+
+按下ESC返回，最后一步会询问你是否保存，按下Y即可保存
+
+![image-20250320175600428](./QEMURISCV64-环境配置搭建.assets/image-20250320175600428.png)
+
+由于软件包是需要通过外部仓库的形式下载的，所以用到下面的命令下载对应仓库
+
+```
+pkgs --update
+```
+
+这样就算是配置好了,随后编译
+
+```
+scons -j12
+```
+
+编译完成后会在目录下生成一个rtthread.bin文件，这里就是等下要用到的内核文件
+
+## 第二步：安装QEMU并运行QEMU-RISCV模拟器
+
+打开终端输入下面的命令安装高版本的QEMU
+
+```
+sudo apt update
+sudo apt install qemu-system-misc
+```
+
+安装完毕后可以看一下版本
+
+```
+qemu-system-riscv64 --version
+```
+
+![image-20250321093516364](./QEMURISCV64-环境配置搭建.assets/image-20250321093516364.png)
+
+### 运行QEMU-RISCV模拟器
+
+来到qemu-virt-riscv64目录下，输入运行命令即可将rtthread跑起来
+
+```
+qemu-system-riscv64 -nographic -machine virt -m 256M -kernel rtthread.bin
+```
+
+在当前目录下有一个脚本"run.sh"，里面默认配置各种硬件设备，包括存储设备、网络设备和串行设备，从而实现虚拟机与外部环境的交互。
+
+```
+./run.sh
+```
+
+同样输入命令运行即可调用刚刚生成的bin文件启动qemu
+
+![image-20250320180052572](./QEMURISCV64-环境配置搭建.assets/image-20250320180052572.png)
+
+### 挂载fat格式镜像
+
+当第一次使用run.sh启动qemu时，会在当前目录下自动生成空的sd.bin的fat格式镜像文件
+
+可以尝试对其进行挂载
+
+```
+mount virtio-blk0 / elm
+```
+
+![image-20250320180327389](./QEMURISCV64-环境配置搭建.assets/image-20250320180327389.png)
+
+- 如何退出 qemu，CTRL + a 组合键按下后，松开，再按一下 x 键
+
+# 第三步：尝试编译评测案例并挂载ext4镜像
+
+对[赛题评测样例]([oscomp/testsuits-for-oskernel at pre-2025](https://github.com/oscomp/testsuits-for-oskernel/tree/pre-2025))进行编译测试
+
+首先拉取仓库到本地
+
+```
+git clone -b pre-2025 https://github.com/oscomp/testsuits-for-oskernel.git
+```
+
+## 修改工具链
+
+通过修改Makefile来调用 RT-Thread Smart的工具链
+
+分别修改以下文件:
+
+### Makefile:
+
+```
+DOCKER ?= docker.educg.net/cg/os-contest:20250226
+
+all: sdcard
+
+build-all: build-rv
+
+build-rv:
+	make -f Makefile.sub clean
+	mkdir -p sdcard/riscv/musl
+	make -f Makefile.sub PREFIX=riscv64-unknown-linux-musl- DESTDIR=sdcard/riscv/musl
+	cp /opt/riscv64gc-linux-musleabi_for_x86_64-pc-linux-gnu/riscv64-unknown-linux-musl/lib/libc.so sdcard/riscv/musl/lib
+	sed -E -i 's/#### OS COMP TEST GROUP ([^ ]+) ([^ ]+) ####/#### OS COMP TEST GROUP \1 \2-musl ####/g' sdcard/riscv/musl/*_testcode.sh
+
+sdcard: build-all .PHONY
+	dd if=/dev/zero of=sdcard-rv.img count=128 bs=1M
+	mkfs.ext4 sdcard-rv.img
+	mkdir -p mnt
+	sudo mount sdcard-rv.img mnt
+	sudo cp -rL sdcard/riscv/* mnt
+	sudo umount mnt
+
+clean:
+	make -f Makefile.sub clean
+	rm -rf sdcard/riscv/*
+	rm -rf sdcard/loongarch/*
+
+docker:
+	docker run --rm -it -v .:/code --entrypoint bash -w /code --privileged $(DOCKER)
+
+
+.PHONY:
+
+```
+
+### basic/user/CMakeLists.txt:
+
+```
+cmake_minimum_required(VERSION 3.13)
+
+project(user)
+enable_language(ASM)
+set(CMAKE_OSX_DEPLOYMENT_TARGET "")
+
+# Path
+if (${ARCH} STREQUAL riscv32 OR ${ARCH} STREQUAL riscv64)
+    set(ARCH_DIR lib/arch/riscv)
+else()
+    set(ARCH_DIR lib/arch/${ARCH})
+endif()
+
+set(ASM_DIR asm)
+set(BIN_DIR bin)
+
+# Toolchain
+set(PREFIX ${ARCH}-unknown-linux-musl-)
+# riscv64-unknown-elf-
+
+if (${ARCH} STREQUAL riscv32)
+    set(CMAKE_C_FLAGS       "-march=rv32imac -mabi=ilp32 -mcmodel=medany")
+elseif (${ARCH} STREQUAL riscv64)
+    set(CMAKE_C_FLAGS       "-march=rv64imac -mabi=lp64 -mcmodel=medany")
+else()
+    message("Unsupported arch: ${ARCH}")
+endif ()
+
+set(CMAKE_ASM_COMPILER      ${PREFIX}gcc)
+set(CMAKE_C_COMPILER        ${PREFIX}gcc)
+set(CMAKE_OBJCOPY           ${PREFIX}objcopy)
+set(CMAKE_OBJDUMP           ${PREFIX}objdump)
+set(CMAKE_RANLIB            ${PREFIX}ranlib)
+set(CMAKE_C_FLAGS           "${CMAKE_C_FLAGS} -fno-builtin -nostdinc -fno-stack-protector -ggdb -Wall")
+set(CMAKE_ASM_FLAGS         ${CMAKE_C_FLAGS})
+set(CMAKE_C_LINK_FLAGS      "${LINK_FLAGS} -nostdlib -T ${CMAKE_CURRENT_SOURCE_DIR}/${ARCH_DIR}/user.ld")
+
+# Library
+aux_source_directory(lib LIBS)
+#set(LIBS ${ARCH_DIR}/crt.S ${LIBS})
+set(LIBS ${ARCH_DIR}/crt.S ${ARCH_DIR}/clone.s ${LIBS})
+add_library(ulib ${LIBS} syscall_ids)
+include_directories(include/)
+target_include_directories(ulib PRIVATE ${ARCH_DIR})
+
+# Execuatble
+set(ENTRY "0x1000")
+#aux_source_directory(src SRCS)
+aux_source_directory(src/oscomp SRCS)
+set(EXECUTABLE_OUTPUT_PATH ${ARCH})
+foreach(PATH ${SRCS})
+    get_filename_component(NAME ${PATH} NAME_WE)
+
+    if ("${CHAPTER}" STREQUAL 2)
+        math(EXPR ENTRY "0x80400000" OUTPUT_FORMAT HEXADECIMAL)
+    endif ()
+
+    if ("${CHAPTER}" MATCHES 3_*)
+        if(${NAME} STREQUAL ch4_mmap0)
+            break ()
+        elseif (${NAME} STREQUAL ch2_exit OR ${NAME} STREQUAL ch3_1_yield0 OR ${NAME} STREQUAL ch3_2_stride0)
+            math(EXPR ENTRY "0x80400000" OUTPUT_FORMAT HEXADECIMAL)
+        elseif (${NAME} STREQUAL ch3t_deadloop)
+            math(EXPR ENTRY "0x80500000" OUTPUT_FORMAT HEXADECIMAL)
+        else ()
+            math(EXPR ENTRY "${ENTRY} + 0x20000" OUTPUT_FORMAT HEXADECIMAL)
+        endif ()
+    endif ()
+
+    add_executable(${NAME} ${PATH})
+    target_link_libraries(${NAME} ulib)
+    target_link_options(${NAME} PRIVATE -Ttext ${ENTRY})
+
+    add_custom_command(
+            TARGET ${NAME}
+            POST_BUILD
+            COMMAND mkdir -p ${ASM_DIR}
+            COMMAND ${CMAKE_OBJDUMP} ARGS -d -S $<TARGET_FILE:${NAME}> > ${ASM_DIR}/${NAME}.asm
+    )
+    add_custom_command(
+            TARGET ${NAME}
+            POST_BUILD
+            COMMAND mkdir -p ${BIN_DIR}
+            COMMAND ${CMAKE_OBJCOPY} ARGS -O binary $<TARGET_FILE:${NAME}> ${BIN_DIR}/${NAME}.bin --set-section-flags .bss=alloc,load,contents
+    )
+endforeach()
+
+add_custom_command(
+        OUTPUT syscall_ids.h
+        COMMAND cp ${CMAKE_SOURCE_DIR}/${ARCH_DIR}/syscall_ids.h.in ${CMAKE_SOURCE_DIR}/lib/syscall_ids.h
+        COMMAND sed ARGS -n -e s/__NR_/SYS_/p
+        < ${CMAKE_SOURCE_DIR}/${ARCH_DIR}/syscall_ids.h.in
+        >> ${CMAKE_SOURCE_DIR}/lib/syscall_ids.h
+)
+```
+
+由于我这新开了一个终端所以还需要配置下临时环境变量
+
+```
+export RTT_EXEC_PATH=/opt/riscv64gc-linux-musleabi_for_x86_64-pc-linux-gnu/bin
+export RTT_CC_PREFIX=riscv64-unknown-linux-musl-
+export PATH=/opt/riscv64gc-linux-musleabi_for_x86_64-pc-linux-gnu/bin:$PATH
+```
+
+这时输入make即可自动编译
+
+最后生成的sdcard-rv.img移动到qemu-virt-riscv64目录下即可
+
+运行模拟器并且挂载ext4镜像
+
+```
+./run sdcard-rv.img
+```
+
+跑起来后手动挂载一下
+
+```
+mount virtio-blk0 / ext
+```
+
+![image-20250322151339894](./QEMURISCV64-环境配置搭建.assets/image-20250322151339894.png)
+
+![image-20250322151348431](./QEMURISCV64-环境配置搭建.assets/image-20250322151348431.png)
+
+# 第五步：QEMU-LoongsonLab环境搭建与配置
+
+## 下载仓库
+
+```
+git clone https://github.com/LoongsonLab/rt-thread.git
+```
+
+## 工具链安装
+
+```
+wget https://github.com/LoongsonLab/oscomp-toolchains-for-oskernel/releases/download/loongarch64-cross-toolchains/loongarch64-musl-gcc-nightly-2025-3-15.tar.gz
+sudo tar zxf loongarch64-musl-gcc-nightly-2025-3-15.tar.gz -C /opt/
+```
+
+## 配置环境变量
+
+```
+export RTT_EXEC_PATH=/opt/riscv64gc-linux-musleabi_for_x86_64-pc-linux-gnu/bin
+export RTT_CC_PREFIX=riscv64-unknown-linux-musl-
+export PATH=/opt/riscv64gc-linux-musleabi_for_x86_64-pc-linux-gnu/bin:$PATH
+```
+
+## 环境搭建
+
+```
+cd bsp/qemu-virt64-loongarch
+scons --menuconfig (无需设置，进入后在退出保存一下相当于初始化)
+source ~/.env/env.sh
+pkgs --update
+scons -j16
+```
+
+## 运行
+
+输入qemu的命令运行或者运行目录下的'run.sh' 但是注意要将run.sh里面的-m 256M改为-m 1024M
+
+```
+qemu-system-loongarch64 -nographic -machine virt -cpu la464 -m 1024M -kernel rtthread.elf
+```
+
+![image-20250322151217123](./QEMURISCV64-环境配置搭建.assets/image-20250322151217123.png)