rcu10.htm

来自「ST20 Embedded Toolset R2.0.5用于开发基于ST20芯片」· HTM 代码 · 共 78 行

HTM
78 行
字号 
<html>

<head>
<meta http-equiv="Content-Type" content="text/html; charset=ISO-8859-1">
<meta name="GENERATOR" content="Quadralay WebWorks Publisher Professional Edition 6.0.5">
<meta name="TEMPLATEBASE" content="book_html">
<meta name="LASTUPDATED" content="12/04/03 16:05:57">
<title>10.2.4 Using the instruction and data caches  </title>

<STYLE TYPE="text/css">
<!--
	span.Signal { text-transform: uppercase; font-family: Verdana }
-->
</STYLE>

</head>

<body link="#3366CC" vlink="#9999CC" text="#000000" alink="#0000CC" bgcolor="#FFFFFF"
background="images/backgrnd.gif">

<p><img src="images/stlogo.gif" width="106" height="83" align="left"
alt="logo here!"> </p>

<table width="331" border="0" align="right" cellpadding="0" cellspacing="0">
  <tr>
    <td><a href="a_refman.htm"><img src="images/navtoc.gif" width="84" height="23"
    border="0" alt="TOC"> </a></td>
    <td><a href="rcu9.htm"><img src="images/navprev.gif" width="80" height="23"
    border="0" alt="PREV"> </a></td>
    <td><a href="rcu11.htm"><img src="images/navnext.gif" width="83" height="23"
    border="0" alt="NEXT"> </a></td>
    <td><a href="a_refmaa.htm"><img src="images/navidx.gif" width="84" height="23"
    border="0" alt="INDEX"> </a></td>
  </tr>
</table>

<p><br clear="all">
</p>

<hr align="left">

<blockquote>
<h3>
  <a name="1204685"> </a><font color="#003366"  face="Verdana, Arial, Helvetica, sans-serif">10.2.4 	 Using the instruction and data caches</font>
</h3>


<p>
  <a name="1204686"> </a><font size=2  face="Verdana, Arial, Helvetica, sans-serif">If either of the ST20 instruction or data caches are enabled, extra care must be taken when handling relocatable code units. If the area of memory that the RCU resides in is cached then it is important to maintain cache coherency.</font>
</p>


<p>
  <a name="1204687"> </a><font size=2  face="Verdana, Arial, Helvetica, sans-serif">This is especially important when replacing one RCU with another. In this situation the following technique should be used. After calling <font size=2 face=Courier><strong>rcu_deinit()</strong></font> and there are no further accesses to the RCU's memory planned, the instruction cache should be invalidated and the data cache should be flushed. This purges all data or instructions belonging to the old RCU from the cache. The new RCU can then be loaded safely. See the <em>OS20 User Manual</em>, chapter <em>Caches</em> for further details.</font>
</p>
</blockquote>

<hr>



<table width="331" border="0" align="left" cellpadding="0" cellspacing="0">
  <tr>
    <td><a href="a_refman.htm"><img src="images/navtoc.gif" width="84" height="23"
    border="0" alt="TOC"> </a></td>
    <td><a href="rcu9.htm"><img src="images/navprev.gif" width="80" height="23"
    border="0" alt="PREV"> </a></td>
    <td><a href="rcu11.htm"><img src="images/navnext.gif" width="83" height="23"
    border="0" alt="NEXT"> </a></td>
    <td><a href="a_refmaa.htm"><img src="images/navidx.gif" width="84" height="23"
    border="0" alt="INDEX"> </a></td>
  </tr>
</table>
<font size=1 face="Verdana, Arial, Helvetica, sans-serif">&nbsp; &copy; 2001, 2002, 2003 STMicroelectronics. All Rights Reserved.<br>
&nbsp; ADCS 7250966F</font>
</body>
</html>

rcu10.htm - 源码说明

本页面展示了「ST20 Embedded Toolset R2.0.5用于开发基于ST20芯片机顶盒软件的开发平台,2.0.5版本,国内找不到的.在国外论坛上花了N天才找到!」中的 rcu10.htm 源码文件，采用 HTM 编程语言编写，共 78 行代码。您可以在线阅读完整代码内容，也可以返回资源详情页下载完整源码包进行本地学习和开发。

虫虫下载站收录了大量与Embedded相关的技术资源，包括源代码、技术文档、电路图等，是电子工程师和嵌入式开发者的专业学习平台。

⌨️ 快捷键说明

复制代码Ctrl + C
搜索代码Ctrl + F
全屏模式F11
增大字号Ctrl + =
减小字号Ctrl + -
显示快捷键?