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<li class="toctree-l2"><a class="reference internal" href="5exercise.html">chapter3练习</a></li>
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<li class="toctree-l2"><a class="reference internal" href="../chapter4/3sv39-implementation-1.html">实现 SV39 多级页表机制（上）</a></li>
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<li class="toctree-l2"><a class="reference internal" href="../chapter4/4sv39-implementation-2.html">实现 SV39 多级页表机制（下）</a></li>
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<li class="toctree-l2"><a class="reference internal" href="../chapter4/7exercise.html">chapter4练习</a></li>
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<li class="toctree-l2"><a class="reference internal" href="../chapter5/1process.html">与进程有关的重要系统调用</a></li>
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<li class="toctree-l2"><a class="reference internal" href="../chapter5/2core-data-structures.html">进程管理的核心数据结构</a></li>
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<li class="toctree-l2"><a class="reference internal" href="../chapter5/3implement-process-mechanism.html">进程管理机制的设计实现</a></li>
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<li class="toctree-l2"><a class="reference internal" href="../chapter5/4exercise.html">chapter5练习</a></li>
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<li class="toctree-l2"><a class="reference internal" href="../chapter6/2fs-implementation-1.html">简易文件系统 easy-fs (上)</a></li>
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<li class="toctree-l2"><a class="reference internal" href="../chapter6/2fs-implementation-2.html">简易文件系统 easy-fs (下)</a></li>
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</ul>
|
||
</li>
|
||
</ul>
|
||
<p class="caption" role="heading"><span class="caption-text">附录</span></p>
|
||
<ul>
|
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<li class="toctree-l1 has-children"><a class="reference internal" href="../appendix-a/index.html">附录 A：Rust 系统编程资料</a><input class="toctree-checkbox" id="toctree-checkbox-17" name="toctree-checkbox-17" role="switch" type="checkbox"/><label for="toctree-checkbox-17"><div class="visually-hidden">Toggle child pages in navigation</div><i class="icon"><svg><use href="#svg-arrow-right"></use></svg></i></label><ul class="simple">
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<li class="toctree-l1 has-children"><a class="reference internal" href="../appendix-b/index.html">附录 B：常见工具的使用方法</a><input class="toctree-checkbox" id="toctree-checkbox-18" name="toctree-checkbox-18" role="switch" type="checkbox"/><label for="toctree-checkbox-18"><div class="visually-hidden">Toggle child pages in navigation</div><i class="icon"><svg><use href="#svg-arrow-right"></use></svg></i></label><ul class="simple">
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<li class="toctree-l1 has-children"><a class="reference internal" href="../appendix-c/index.html">附录 C：深入机器模式：RustSBI</a><input class="toctree-checkbox" id="toctree-checkbox-19" name="toctree-checkbox-19" role="switch" type="checkbox"/><label for="toctree-checkbox-19"><div class="visually-hidden">Toggle child pages in navigation</div><i class="icon"><svg><use href="#svg-arrow-right"></use></svg></i></label><ul class="simple">
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<li class="toctree-l1"><a class="reference internal" href="../appendix-d/index.html">附录 D：RISC-V相关信息</a></li>
|
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</ul>
|
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<p class="caption" role="heading"><span class="caption-text">开发注记</span></p>
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<div class="section" id="id1">
|
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<h1>引言<a class="headerlink" href="#id1" title="永久链接至标题">¶</a></h1>
|
||
<div class="section" id="id2">
|
||
<h2>本章导读<a class="headerlink" href="#id2" title="永久链接至标题">¶</a></h2>
|
||
<p>本章的目标是实现分时多任务系统，它能并发地执行多个用户程序，并调度这些程序。为此需要实现</p>
|
||
<ul class="simple">
|
||
<li><p>一次性加载所有用户程序，减少任务切换开销；</p></li>
|
||
<li><p>支持任务切换机制，保存切换前后程序上下文；</p></li>
|
||
<li><p>支持程序主动放弃处理器，实现 yield 系统调用；</p></li>
|
||
<li><p>以时间片轮转算法调度用户程序，实现资源的时分复用。</p></li>
|
||
</ul>
|
||
</div>
|
||
<div class="section" id="id3">
|
||
<h2>实践体验<a class="headerlink" href="#id3" title="永久链接至标题">¶</a></h2>
|
||
<div class="admonition note">
|
||
<p class="admonition-title">注解</p>
|
||
<p>基于github classroom的开发方式</p>
|
||
<p>基于github classroom，可方便建立开发用的git repository，并可基于github的 codespace （在线版ubuntu +vscode）在线开发使用。整个开发环境仅仅需要一个网络浏览器。</p>
|
||
<ol class="arabic simple">
|
||
<li><p>在网络浏览器中用自己的 github id 登录 github.com</p></li>
|
||
<li><p>接收 <a class="reference external" href="https://classroom.github.com/a/s1v7GyJM">第一个实验(os3)的github classroom在线邀请</a> ，根据提示一路选择OK即可。</p></li>
|
||
<li><p>完成第二步后，你的第一个实验的 github repository 会被自动建立好，点击此github repository的链接，就可看到你要完成的第一个实验了。</p></li>
|
||
<li><p>在你的第一个实验的网页的中上部可以看到一个醒目的 <cite>code</cite> 绿色按钮，点击后，可以进一步看到 <cite>codespace</cite> 标签和醒目的 <cite>create codesapce on main</cite> 绿色按钮。请点击这个绿色按钮，就可以进入到在线的ubuntu +vscode环境中</p></li>
|
||
<li><p>再按照下面的环境安装提示在vscode的 <cite>console</cite> 中安装配置开发环境：rustc，qemu等工具。注：也可在vscode的 <cite>console</cite> 中执行 <code class="docutils literal notranslate"><span class="pre">make</span> <span class="pre">codespaces_setenv</span></code> 来自动安装配置开发环境（执行``sudo``需要root权限，仅需要执行一次）。</p></li>
|
||
<li><p>在vscode的 <cite>console</cite> 中执行 <cite>make setupclassroom_test3</cite> （该命令仅执行一次）配置githubclassroom 自动评分功能。</p></li>
|
||
<li><p>然后就可以基于在线vscode进行开发、运行、提交等完整的实验过程了。</p></li>
|
||
</ol>
|
||
<p>上述的3，4，5步不是必须的，你也可以线下本地开发。</p>
|
||
<p>注：如果是本地的ubuntu中建立开发环境，可在shell中执行 <code class="docutils literal notranslate"><span class="pre">make</span> <span class="pre">ubuntu_local_setenv</span></code> 来自动安装配置开发环境（执行``sudo``需要root权限，仅需要执行一次）。</p>
|
||
</div>
|
||
<p>获取本章代码：</p>
|
||
<div class="highlight-console notranslate"><div class="highlight"><pre><span></span><span class="gp">$ </span>git clone <span class="sb">``</span>gitaddr of github-classroom-build-lab1<span class="sb">``</span>
|
||
<span class="gp">$ </span><span class="nb">cd</span> <span class="sb">``</span>github-classroom-build-lab1<span class="sb">``</span>
|
||
<span class="gp">$ </span>make setupclassroom_test3 //注意：这一步很重要，是用于github classroom自动评测你的工作。这一步只需在首次克隆项目仓库时执行一次，以后一般就不用执行了，除非 .github/workflows/classroom.yml发生了变化。
|
||
</pre></div>
|
||
</div>
|
||
<div class="admonition note">
|
||
<p class="admonition-title">注解</p>
|
||
<p>实验名称 ：实验编号</p>
|
||
<ul class="simple">
|
||
<li><p>lab0-0 : test1</p></li>
|
||
<li><p>lab0-1：test2</p></li>
|
||
<li><p>lab1：test3</p></li>
|
||
<li><p>lab2：test4</p></li>
|
||
<li><p>lab3：test5</p></li>
|
||
<li><p>lab4：test6</p></li>
|
||
<li><p>lab5：test8</p></li>
|
||
</ul>
|
||
</div>
|
||
<p>在 qemu 模拟器上运行 <a class="reference external" href="https://github.com/LearningOS/rust-based-os-comp2022/tree/main/os3-ref">lab1(os3)参考框架:</a> ：</p>
|
||
<div class="highlight-console notranslate"><div class="highlight"><pre><span></span><span class="gp">$ </span><span class="nb">cd</span> os3-ref
|
||
<span class="gp">$ </span>make run
|
||
</pre></div>
|
||
</div>
|
||
<p>运行代码，看到用户程序交替输出信息：</p>
|
||
<div class="highlight-default notranslate"><div class="highlight"><pre><span></span>[rustsbi] RustSBI version 0.2.0-alpha.4
|
||
.______ __ __ _______.___________. _______..______ __
|
||
| _ \ | | | | / | | / || _ \ | |
|
||
| |_) | | | | | | (----`---| |----`| (----`| |_) || |
|
||
| / | | | | \ \ | | \ \ | _ < | |
|
||
| |\ \----.| `--' |.----) | | | .----) | | |_) || |
|
||
| _| `._____| \______/ |_______/ |__| |_______/ |______/ |__|
|
||
|
||
[rustsbi] Implementation: RustSBI-QEMU Version 0.0.1
|
||
[rustsbi-dtb] Hart count: cluster0 with 1 cores
|
||
[rustsbi] misa: RV64ACDFIMSU
|
||
[rustsbi] mideleg: ssoft, stimer, sext (0x222)
|
||
[rustsbi] medeleg: ima, ia, bkpt, la, sa, uecall, ipage, lpage, spage (0xb1ab)
|
||
[rustsbi] pmp0: 0x80000000 ..= 0x800fffff (rwx)
|
||
[rustsbi] pmp1: 0x80000000 ..= 0x807fffff (rwx)
|
||
[rustsbi] pmp2: 0x0 ..= 0xffffffffffffff (---)
|
||
[rustsbi] enter supervisor 0x80200000
|
||
[kernel] Hello, world!
|
||
power_3 [10000/200000]
|
||
power_3 [20000/200000]
|
||
power_3 [30000/200000]
|
||
power_3 [40000/200000]
|
||
power_3 [50000/200000]
|
||
power_3 [60000/200000]
|
||
power_3 [70000/200000]
|
||
power_3 [80000/200000]
|
||
power_3 [90000/200000]
|
||
power_3 [100000/200000]
|
||
power_3 [110000/200000]
|
||
power_3 [120000/200000]
|
||
power_3 [130000/200000]
|
||
power_3 [140000/200000]
|
||
power_3 [150000/200000]
|
||
power_3 [160000/200000]
|
||
power_3 [170000/200000]
|
||
power_3 [180000/200000]
|
||
power_3 [190000/200000]
|
||
power_3 [200000/200000]
|
||
3^200000 = 871008973(MOD 998244353)
|
||
Test power_3 OK!
|
||
power_5 [10000/140000]
|
||
power_5 [20000/140000]
|
||
power_5 [30000/140000]
|
||
power_5 [40000/140000]
|
||
power_5 [50000/140000]
|
||
power_5 [60000/140000]
|
||
power_7 [10000/160000]
|
||
power_7 [20000/160000]
|
||
power_7 [30000/160000]
|
||
power_7 [40000/160000]
|
||
power_7 [50000/160000]
|
||
power_7 [60000/160000]
|
||
power_7 [70000/160000]
|
||
power_7 [80000/160000]
|
||
power_7 [90000/160000]
|
||
power_7 [100000/160000]
|
||
power_7 [110000/160000]
|
||
power_7 [120000/160000]
|
||
power_7 [130000/160000]
|
||
power_7 [140000/160000]
|
||
power_7 [150000/160000]
|
||
power_7 [160000/160000]
|
||
7^160000 = 667897727(MOD 998244353)
|
||
Test power_7 OK!
|
||
get_time OK! 42
|
||
current time_msec = 42
|
||
AAAAAAAAAA [1/5]
|
||
BBBBBBBBBB [1/5]
|
||
CCCCCCCCCC [1/5]
|
||
power_5 [70000/140000]
|
||
AAAAAAAAAA [2/5]
|
||
BBBBBBBBBB [2/5]
|
||
CCCCCCCCCC [2/5]
|
||
power_5 [80000/140000]
|
||
power_5 [90000/140000]
|
||
power_5 [100000/140000]
|
||
power_5 [110000/140000]
|
||
power_5 [120000/140000]
|
||
power_5 [130000/140000]
|
||
power_5 [140000/140000]
|
||
5^140000 = 386471875(MOD 998244353)
|
||
Test power_5 OK!
|
||
AAAAAAAAAA [3/5]
|
||
BBBBBBBBBB [3/5]
|
||
CCCCCCCCCC [3/5]
|
||
AAAAAAAAAA [4/5]
|
||
BBBBBBBBBB [4/5]
|
||
CCCCCCCCCC [4/5]
|
||
AAAAAAAAAA [5/5]
|
||
BBBBBBBBBB [5/5]
|
||
CCCCCCCCCC [5/5]
|
||
Test write A OK!
|
||
Test write B OK!
|
||
Test write C OK!
|
||
time_msec = 143 after sleeping 100 ticks, delta = 101ms!
|
||
Test sleep1 passed!
|
||
Test sleep OK!
|
||
Panicked at src/task/mod.rs:98 All applications completed!
|
||
</pre></div>
|
||
</div>
|
||
</div>
|
||
<div class="section" id="id5">
|
||
<h2><a class="reference external" href="https://github.com/LearningOS/rust-based-os-comp2022/tree/main/os3-ref">lab1(os3)参考框架:</a><a class="headerlink" href="#id5" title="永久链接至标题">¶</a></h2>
|
||
<div class="highlight-default notranslate"><div class="highlight"><pre><span></span>── os3-ref
|
||
├── build.rs
|
||
├── Cargo.toml
|
||
├── Makefile
|
||
└── src
|
||
├── batch.rs(移除：功能分别拆分到 loader 和 task 两个子模块)
|
||
├── config.rs(新增：保存内核的一些配置)
|
||
├── console.rs
|
||
├── logging.rs
|
||
├── sync
|
||
├── entry.asm
|
||
├── lang_items.rs
|
||
├── link_app.S
|
||
├── linker.ld
|
||
├── loader.rs(新增：将应用加载到内存并进行管理)
|
||
├── main.rs(修改：主函数进行了修改)
|
||
├── sbi.rs(修改：引入新的 sbi call set_timer)
|
||
├── syscall(修改：新增若干 syscall)
|
||
│ ├── fs.rs
|
||
│ ├── mod.rs
|
||
│ └── process.rs
|
||
├── task(新增：task 子模块，主要负责任务管理)
|
||
│ ├── context.rs(引入 Task 上下文 TaskContext)
|
||
│ ├── mod.rs(全局任务管理器和提供给其他模块的接口)
|
||
│ ├── switch.rs(将任务切换的汇编代码解释为 Rust 接口 __switch)
|
||
│ ├── switch.S(任务切换的汇编代码)
|
||
│ └── task.rs(任务控制块 TaskControlBlock 和任务状态 TaskStatus 的定义)
|
||
├── timer.rs(新增：计时器相关)
|
||
└── trap
|
||
├── context.rs
|
||
├── mod.rs(修改：时钟中断相应处理)
|
||
└── trap.S
|
||
|
||
cloc os
|
||
-------------------------------------------------------------------------------
|
||
Language files blank comment code
|
||
-------------------------------------------------------------------------------
|
||
Rust 21 87 20 627
|
||
Assembly 4 12 22 144
|
||
make 1 11 4 36
|
||
TOML 1 2 1 10
|
||
-------------------------------------------------------------------------------
|
||
SUM: 27 112 47 817
|
||
-------------------------------------------------------------------------------
|
||
</pre></div>
|
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<li><a class="reference internal" href="#id2">本章导读</a></li>
|
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<li><a class="reference internal" href="#id3">实践体验</a></li>
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<li><a class="reference internal" href="#id5">lab1(os3)参考框架:</a></li>
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