<!DOCTYPE html><htmllang="en"><head><metacharset="utf-8"><metaname="viewport"content="width=device-width, initial-scale=1.0"><metaname="generator"content="rustdoc"><metaname="description"content="Record root ppn and has the same lifetime as 1 and 2 level `PageTableEntry`"><metaname="keywords"content="rust, rustlang, rust-lang, PageTable"><title>PageTable in os::mm - Rust</title><linkrel="preload"as="font"type="font/woff2"crossoriginhref="../../SourceSerif4-Regular.ttf.woff2"><linkrel="preload"as="font"type="font/woff2"crossoriginhref="../../FiraSans-Regular.woff2"><linkrel="preload"as="font"type="font/woff2"crossoriginhref="../../FiraSans-Medium.woff2"><linkrel="preload"as="font"type="font/woff2"crossoriginhref="../../SourceCodePro-Regular.ttf.woff2"><linkrel="preload"as="font"type="font/woff2"crossoriginhref="../../SourceSerif4-Bold.ttf.woff2"><linkrel="preload"as="font"type="font/woff2"crossoriginhref="../../SourceCodePro-Semibold.ttf.woff2"><linkrel="stylesheet"type="text/css"href="../../normalize.css"><linkrel="stylesheet"type="text/css"href="../../rustdoc.css"id="mainThemeStyle"><linkrel="stylesheet"type="text/css"href="../../ayu.css"disabled><linkrel="stylesheet"type="text/css"href="../../dark.css"disabled><linkrel="stylesheet"type="text/css"href="../../light.css"id="themeStyle"><scriptid="default-settings"></script><scriptsrc="../../storage.js"></script><scriptdefersrc="sidebar-items.js"></script><scriptdefersrc="../../main.js"></script><noscript><linkrel="stylesheet"href="../../noscript.css"></noscript><linkrel="alternate icon"type="image/png"href="../../favicon-16x16.png"><linkrel="alternate icon"type="image/png"href="../../favicon-32x32.png"><linkrel="icon"type="image/svg+xml"href="../../favicon.svg"></head><bodyclass="rustdoc struct"><!--[if lte IE 11]><div class="warning">This old browser is unsupported and will most likely display funky things.</div><![endif]--><navclass="mobile-topbar"><buttonclass="sidebar-menu-toggle">☰</button><aclass="sidebar-logo"href="../../os/index.html"><divclass="logo-container"><imgclass="rust-logo"src="../../rust-logo.svg"alt="logo"></div></a><h2class="location"></h2></nav><navclass="sidebar"><aclass="sidebar-logo"href="../../os/index.html"><divclass="logo-container"><imgclass="rust-logo"src="../../rust-logo.svg"alt="logo"></div></a><h2class="location"><ahref="#">PageTable</a></h2><divclass="sidebar-elems"><section><divclass="block"><h3class="sidebar-title"><ahref="#fields">Fields</a></h3><ul><li><ahref="#structfield.frames">frames</a></li><li><ahref="#structfield.root_ppn">root_ppn</a></li></ul></div><divclass="block"><h3class="sidebar-title"><ahref="#implementations">Methods</a></h3><ul><li><ahref="#method.find_pte">find_pte</a></li><li><ahref="#method.find_pte_create">find_pte_create</a></li><li><ahref="#method.from_token">from_token</a></li><li><ahref="#method.map">map</a></li><li><ahref="#method.new">new</a></li><li><ahref="#method.token">token</a></li><li><ahref="#method.translate">translate</a></li><li><ahref="#method.translate_va">translate_va</a></li><li><ahref="#method.unmap">unmap</a></li></ul></div><divclass="block"><h3class="sidebar-title"><ahref="#synthetic-implementations">Auto Trait Implementations</a></h3><ul><li><ahref="#impl-RefUnwindSafe-for-PageTable">RefUnwindSafe</a></li><li><ahref="#impl-Send-for-PageTable">Send</a></li><li><ahref="#impl-Sync-for-PageTable">Sync</a></li><li><ahref="#impl-Unpin-for-PageTable">Unpin</a></li><li><ahref="#impl-UnwindSafe-for-PageTable">UnwindSafe</a></li></ul></div><divclass="block"><h3class="sidebar-title"><ahref="#blanket-implementations">Blanket Implementations</a></h3><ul><li><ahref="#impl-Any-for-PageTable">Any</a></li><li><ahref="#impl-Borrow%3CT%3E-for-PageTable">Borrow<T></a></li><li><ahref="#impl-BorrowMut%3CT%3E-for-PageTable">BorrowMut<T></a></li><li><ahref="#impl-From%3CT%3E-for-PageTable">From<T></a></li><li><ahref="#impl-Into%3CU%3E-for-PageTable">Into<U>
}</code></pre></div><detailsclass="rustdoc-toggle top-doc"open><summaryclass="hideme"><span>Expand description</span></summary><divclass="docblock"><p>Record root ppn and has the same lifetime as 1 and 2 level <code>PageTableEntry</code></p>
</div></details><h2id="fields"class="fields small-section-header">Fields<ahref="#fields"class="anchor"></a></h2><spanid="structfield.root_ppn"class="structfield small-section-header"><ahref="#structfield.root_ppn"class="anchor field"></a><code>root_ppn: <aclass="struct"href="address/struct.PhysPageNum.html"title="struct os::mm::address::PhysPageNum">PhysPageNum</a></code></span><spanid="structfield.frames"class="structfield small-section-header"><ahref="#structfield.frames"class="anchor field"></a><code>frames: <aclass="struct"href="https://doc.rust-lang.org/nightly/alloc/vec/struct.Vec.html"title="struct alloc::vec::Vec">Vec</a><<aclass="struct"href="frame_allocator/struct.FrameTracker.html"title="struct os::mm::frame_allocator::FrameTracker">FrameTracker</a>></code></span><h2id="implementations"class="small-section-header">Implementations<ahref="#implementations"class="anchor"></a></h2><divid="implementations-list"><detailsclass="rustdoc-toggle implementors-toggle"open><summary><sectionid="impl-PageTable"class="impl has-srclink"><spanclass="rightside"><aclass="srclink"href="../../src/os/mm/page_table.rs.html#72-157">source</a></span><ahref="#impl-PageTable"class="anchor"></a><h3class="code-header in-band">impl <aclass="struct"href="page_table/struct.PageTable.html"title="struct os::mm::page_table::PageTable">PageTable</a></h3></section></summary><divclass="docblock"><p>Assume that it won’t oom when creating/mapping.</p>
</div><divclass="impl-items"><detailsclass="rustdoc-toggle method-toggle"open><summary><sectionid="method.new"class="method has-srclink"><spanclass="rightside"><aclass="srclink"href="../../src/os/mm/page_table.rs.html#74-80">source</a></span><h4class="code-header">pub fn <ahref="#method.new"class="fnname">new</a>() -> Self</h4></section></summary><divclass="docblock"><p>Create an empty <code>PageTable</code></p>
</div></details><detailsclass="rustdoc-toggle method-toggle"open><summary><sectionid="method.from_token"class="method has-srclink"><spanclass="rightside"><aclass="srclink"href="../../src/os/mm/page_table.rs.html#82-87">source</a></span><h4class="code-header">pub fn <ahref="#method.from_token"class="fnname">from_token</a>(satp: <aclass="primitive"href="https://doc.rust-lang.org/nightly/core/primitive.usize.html">usize</a>) -> Self</h4></section></summary><divclass="docblock"><p>Temporarily used to get arguments from user space.</p>
</div></details><detailsclass="rustdoc-toggle method-toggle"open><summary><sectionid="method.find_pte_create"class="method has-srclink"><spanclass="rightside"><aclass="srclink"href="../../src/os/mm/page_table.rs.html#89-107">source</a></span><h4class="code-header">fn <ahref="#method.find_pte_create"class="fnname">find_pte_create</a>(&mut self, vpn: <aclass="struct"href="address/struct.VirtPageNum.html"title="struct os::mm::address::VirtPageNum">VirtPageNum</a>) -><aclass="enum"href="https://doc.rust-lang.org/nightly/core/option/enum.Option.html"title="enum core::option::Option">Option</a><&mut <aclass="struct"href="page_table/struct.PageTableEntry.html"title="struct os::mm::page_table::PageTableEntry">PageTableEntry</a>></h4></section></summary><divclass="docblock"><p>Find phsical address by virtual address, create a frame if not exist</p>
</div></details></div></details><detailsclass="rustdoc-toggle implementors-toggle"><summary><sectionid="impl-TryFrom%3CU%3E-for-PageTable"class="impl has-srclink"><spanclass="rightside"><aclass="srclink"href="https://doc.rust-lang.org/nightly/src/core/convert/mod.rs.html#598">source</a></span><ahref="#impl-TryFrom%3CU%3E-for-PageTable"class="anchor"></a><h3class="code-header in-band">impl<T, U><aclass="trait"href="https://doc.rust-lang.org/nightly/core/convert/trait.TryFrom.html"title="trait core::convert::TryFrom">TryFrom</a><U> for T <spanclass="where fmt-newline">where<br> U: <aclass="trait"href="https://doc.rust-lang.org/nightly/core/convert/trait.Into.html"title="trait core::convert::Into">Into</a><T>, </span></h3></section></summary><divclass="impl-items"><detailsclass="rustdoc-toggle"open><summary><sectionid="associatedtype.Error"class="associatedtype trait-impl has-srclink"><ahref="#associatedtype.Error"class="anchor"></a><h4class="code-header">type <ahref="https://doc.rust-lang.org/nightly/core/convert/trait.TryFrom.html#associatedtype.Error"class="associatedtype">Error</a> = <aclass="enum"href="https://doc.rust-lang.org/nightly/core/convert/enum.Infallible.html"title="enum core::convert::Infallible">Infallible</a></h4></section></summary><divclass='docblock'><p>The type returned in the event of a conversion error.</p>
</div></details></div></details><detailsclass="rustdoc-toggle implementors-toggle"><summary><sectionid="impl-TryInto%3CU%3E-for-PageTable"class="impl has-srclink"><spanclass="rightside"><aclass="srclink"href="https://doc.rust-lang.org/nightly/src/core/convert/mod.rs.html#583">source</a></span><ahref="#impl-TryInto%3CU%3E-for-PageTable"class="anchor"></a><h3class="code-header in-band">impl<T, U><aclass="trait"href="https://doc.rust-lang.org/nightly/core/convert/trait.TryInto.html"title="trait core::convert::TryInto">TryInto</a><U> for T <spanclass="where fmt-newline">where<br> U: <aclass="trait"href="https://doc.rust-lang.org/nightly/core/convert/trait.TryFrom.html"title="trait core::convert::TryFrom">TryFrom</a><T>, </span></h3></section></summary><divclass="impl-items"><detailsclass="rustdoc-toggle"open><summary><sectionid="associatedtype.Error-1"class="associatedtype trait-impl has-srclink"><ahref="#associatedtype.Error-1"class="anchor"></a><h4class="code-header">type <ahref="https://doc.rust-lang.org/nightly/core/convert/trait.TryInto.html#associatedtype.Error"class="associatedtype">Error</a> = <U as <aclass="trait"href="https://doc.rust-lang.org/nightly/core/convert/trait.TryFrom.html"title="trait core::convert::TryFrom">TryFrom</a><T>>::<aclass="associatedtype"href="https://doc.rust-lang.org/nightly/core/convert/trait.TryFrom.html#associatedtype.Error"title="type core::convert::TryFrom::Error">Error</a></h4></section></summary><divclass='docblock'><p>The type returned in the event of a conversion error.</p>
