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README
Apache-2.0

22:12 2023/6/24

一、简介

XEMU 是一款轻量级的 RISC-V 解释型模拟器,基于 C 语言实现,支持 RV32IM 指令集,支持简单外设模拟

  • 解释型模拟器:取指、译指、执行、更新 PC,例如 Spick、XEMU

  • 翻译型模拟器:取值、译指、生成本机指令序列、更新 PC,例如 QEMU

二、功能介绍

1. 环境介绍

  • 软件编译器:GNU MCU Eclipse RISC-V Embedded GCC, 64-bit (gcc version 8.2.0)

2. 地址分配

起始地址 结束地址 大小 外设 支持
0x0000_0000 0x0fff_ffff 512K ROM
0x1000_0000 0x1fff_ffff 512K RAM
0x2000_0000 0x2fff_ffff 4K TIMER1 ×
0x3000_0000 0x3fff_ffff 4K UART1
0x4000_0000 0x4fff_ffff 4K LCD1

实际使用的空间大小详见 link.lds 文件。

三、使用说明

0. 安装 curses 库和 XCB 库

sudo apt-get update
sudo apt-get install -y libncurses-dev
sudo apt-get install -y libxcb-randr0-dev libxcb-xtest0-dev libxcb-xinerama0-dev libxcb-shape0-dev libxcb-xkb-dev libxcb-image0-dev

1. 指令集测试

  1. 在源代码中关闭宏 ENABLE_UART

  2. 执行 gcc -DDEBUG_ISA xemu.c -o xemu.exe

  3. 执行 xemu.exe ./rv32im/rv32ui-p-add.bin,观察打印的结果

  4. 执行 ./autotest.sh,自动测试所有指令

模拟器退出条件:x26=1,x27=0/1

2. 处理器功能模拟

  1. 进入 ./sim 文件夹下,选择测试用例并进入,执行 make build

  2. 在根目录下执行 make build && make run

模拟器退出条件:1. 通过 UART1 发送字节序列 0x1b 0x04
模拟器退出条件:2. 键盘输入 Ctrl+b/B

四、修改日志

注意,目前只支持在 Ubuntu 上运行!

  • v4.0

    • 添加 lcd 外设(22:13 2023/8/28)
  • v3.0

    • 修复 bug(23:36 2023/7/6)
  • v2.3

    • 重构代码,减少适配对 rt-thread 源码的修改(22:12 2023/07/04)
  • v2.2

    • 适配 rt-thread(16:59 2023/6/27)
  • v2.1

    • 支持在 Linux 平台运行(00:31 2023/6/27)
  • v2.0

    • 添加键盘输入线程(14:17 2023/6/26)
  • v1.1

    • 添加 UART RX 功能(05:27 2023/6/26)
  • v1.0

    • 创建项目并集成测试(22:12 2023/6/24)

五、维护

如果有任何疑问或者建议,欢迎在下方评论,或者通过邮件联系(E-mail:ytesliang@163.com),我会尽可能在 24 小时内进行回复。

ATONEMAN
2023.06.24

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简介

XEMU 是一款轻量级的 RISC-V 解释型模拟器,基于 C 语言实现,支持 RV32IM 指令集,支持简单外设模拟 展开 收起
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