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<!-- Copyright (C) 2003 Red Hat, Inc. --><!-- This material may be distributed only subject to the terms --><!-- and conditions set forth in the Open Publication License, v1.0 --><!-- or later (the latest version is presently available at --><!-- http://www.opencontent.org/openpub/). --><!-- Distribution of the work or derivative of the work in any --><!-- standard (paper) book form is prohibited unless prior --><!-- permission is obtained from the copyright holder. --><HTML><HEAD><TITLE>mfill</TITLE><meta name="MSSmartTagsPreventParsing" content="TRUE"><METANAME="GENERATOR"CONTENT="Modular DocBook HTML Stylesheet Version 1.76b+"><LINKREL="HOME"TITLE="eCos Reference Manual"HREF="ecos-ref.html"><LINKREL="UP"TITLE="Common Commands"HREF="common-commands.html"><LINKREL="PREVIOUS"TITLE="mcmp"HREF="mcmp-command.html"><LINKREL="NEXT"TITLE="ping"HREF="ping-command.html"></HEAD><BODYCLASS="REFENTRY"BGCOLOR="#FFFFFF"TEXT="#000000"LINK="#0000FF"VLINK="#840084"ALINK="#0000FF"><DIVCLASS="NAVHEADER"><TABLESUMMARY="Header navigation table"WIDTH="100%"BORDER="0"CELLPADDING="0"CELLSPACING="0"><TR><THCOLSPAN="3"ALIGN="center">eCos Reference Manual</TH></TR><TR><TDWIDTH="10%"ALIGN="left"VALIGN="bottom"><AHREF="mcmp-command.html"ACCESSKEY="P">Prev</A></TD><TDWIDTH="80%"ALIGN="center"VALIGN="bottom"></TD><TDWIDTH="10%"ALIGN="right"VALIGN="bottom"><AHREF="ping-command.html"ACCESSKEY="N">Next</A></TD></TR></TABLE><HRALIGN="LEFT"WIDTH="100%"></DIV><H1><ANAME="MFILL-COMMAND">mfill</H1><DIVCLASS="REFNAMEDIV"><ANAME="AEN3663"></A><H2>Name</H2>mfill -- Fill RAM with a specified pattern</DIV><DIVCLASS="REFSYNOPSISDIV"><ANAME="AEN3666"><H2>Synopsis</H2><P><BCLASS="COMMAND">mfill</B> {-b <TTCLASS="REPLACEABLE"><I>location</I></TT>} {-l <TTCLASS="REPLACEABLE"><I>length</I></TT>} {-p <TTCLASS="REPLACEABLE"><I>value</I></TT>} [-1 | -2 | -4]</P></DIV><DIVCLASS="REFSECT1"><ANAME="AEN3679"></A><H2>Arguments</H2><DIVCLASS="INFORMALTABLE"><ANAME="AEN3681"><P></P><TABLEBORDER="1"CLASS="CALSTABLE"><THEAD><TR><THWIDTH="25%"ALIGN="LEFT"VALIGN="TOP">Name</TH><THWIDTH="25%"ALIGN="LEFT"VALIGN="TOP">Type</TH><THWIDTH="25%"ALIGN="LEFT"VALIGN="TOP">Description</TH><THWIDTH="25%"ALIGN="LEFT"VALIGN="TOP">Default</TH></TR></THEAD><TBODY><TR><TDWIDTH="25%"ALIGN="LEFT"VALIGN="TOP">-b <TTCLASS="REPLACEABLE"><I>location</I></TT></TD><TDWIDTH="25%"ALIGN="LEFT"VALIGN="TOP">Memory address</TD><TDWIDTH="25%"ALIGN="LEFT"VALIGN="TOP">Location in memory for start of data.</TD><TDWIDTH="25%"ALIGN="LEFT"VALIGN="TOP"><SPANCLASS="emphasis"><ICLASS="EMPHASIS">none</I></SPAN></TD></TR><TR><TDWIDTH="25%"ALIGN="LEFT"VALIGN="TOP">-l <TTCLASS="REPLACEABLE"><I>length</I></TT></TD><TDWIDTH="25%"ALIGN="LEFT"VALIGN="TOP">Number</TD><TDWIDTH="25%"ALIGN="LEFT"VALIGN="TOP">Length of data</TD><TDWIDTH="25%"ALIGN="LEFT"VALIGN="TOP"><SPANCLASS="emphasis"><ICLASS="EMPHASIS">none</I></SPAN></TD></TR><TR><TDWIDTH="25%"ALIGN="LEFT"VALIGN="TOP">-p <TTCLASS="REPLACEABLE"><I>pattern</I></TT></TD><TDWIDTH="25%"ALIGN="LEFT"VALIGN="TOP">Number</TD><TDWIDTH="25%"ALIGN="LEFT"VALIGN="TOP">Data value to fill with</TD><TDWIDTH="25%"ALIGN="LEFT"VALIGN="TOP">0</TD></TR><TR><TDWIDTH="25%"ALIGN="LEFT"VALIGN="TOP">-1</TD><TDWIDTH="25%"ALIGN="LEFT"VALIGN="TOP"> </TD><TDWIDTH="25%"ALIGN="LEFT"VALIGN="TOP">Access one byte (8 bits) at a time. Only the least significant 8 bits of the pattern will be used.</TD><TDWIDTH="25%"ALIGN="LEFT"VALIGN="TOP">-4</TD></TR><TR><TDWIDTH="25%"ALIGN="LEFT"VALIGN="TOP">-2</TD><TDWIDTH="25%"ALIGN="LEFT"VALIGN="TOP"> </TD><TDWIDTH="25%"ALIGN="LEFT"VALIGN="TOP">Access two bytes (16 bits) at a time. Only the least significant 16 bits of the pattern will be used.</TD><TDWIDTH="25%"ALIGN="LEFT"VALIGN="TOP">-4</TD></TR><TR><TDWIDTH="25%"ALIGN="LEFT"VALIGN="TOP">-4</TD><TDWIDTH="25%"ALIGN="LEFT"VALIGN="TOP"> </TD><TDWIDTH="25%"ALIGN="LEFT"VALIGN="TOP">Access one word (32 bits) at a time.</TD><TDWIDTH="25%"ALIGN="LEFT"VALIGN="TOP">-4</TD></TR></TBODY></TABLE><P></P></DIV></DIV><DIVCLASS="REFSECT1"><ANAME="AEN3729"></A><H2>Description</H2><P>Fills a range of memory with the given pattern.</P></DIV><DIVCLASS="REFSECT1"><ANAME="AEN3732"></A><H2>Examples</H2><P>Fill a buffer with zeros.<TABLEBORDER="5"BGCOLOR="#E0E0F0"WIDTH="70%"><TR><TD><PRECLASS="SCREEN"> RedBoot> <TTCLASS="USERINPUT"><B>x -b 0x100000 -l 0x20</B></TT>00100000: 00 3E 00 06 00 06 00 06 00 00 00 00 00 00 00 00 |.>..............|00100010: 00 00 00 78 00 70 00 60 00 60 00 60 00 60 00 60 |...x.p.`.`.`.`.`|RedBoot> <TTCLASS="USERINPUT"><B>mfill -b 0x100000 -l 0x20</B></TT>RedBoot> <TTCLASS="USERINPUT"><B>x -b 0x100000 -l 0x20</B></TT>00100000: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 |................|00100010: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 |................|</PRE></TD></TR></TABLE> </P><P>Fill a buffer with a pattern.<TABLEBORDER="5"BGCOLOR="#E0E0F0"WIDTH="70%"><TR><TD><PRECLASS="SCREEN"> RedBoot> <TTCLASS="USERINPUT"><B>mfill -b 0x100000 -l 0x20 -p 0xDEADFACE</B></TT>RedBoot> <TTCLASS="USERINPUT"><B>x -b 0x100000 -l 0x20</B></TT>00100000: CE FA AD DE CE FA AD DE CE FA AD DE CE FA AD DE |................|00100010: CE FA AD DE CE FA AD DE CE FA AD DE CE FA AD DE |................|</PRE></TD></TR></TABLE> </P></DIV><DIVCLASS="NAVFOOTER"><HRALIGN="LEFT"WIDTH="100%"><TABLESUMMARY="Footer navigation table"WIDTH="100%"BORDER="0"CELLPADDING="0"CELLSPACING="0"><TR><TDWIDTH="33%"ALIGN="left"VALIGN="top"><AHREF="mcmp-command.html"ACCESSKEY="P">Prev</A></TD><TDWIDTH="34%"ALIGN="center"VALIGN="top"><AHREF="ecos-ref.html"ACCESSKEY="H">Home</A></TD><TDWIDTH="33%"ALIGN="right"VALIGN="top"><AHREF="ping-command.html"ACCESSKEY="N">Next</A></TD></TR><TR><TDWIDTH="33%"ALIGN="left"VALIGN="top">mcmp</TD><TDWIDTH="34%"ALIGN="center"VALIGN="top"><AHREF="common-commands.html"ACCESSKEY="U">Up</A></TD><TDWIDTH="33%"ALIGN="right"VALIGN="top">ping</TD></TR></TABLE></DIV></BODY></HTML>⌨️ 快捷键说明
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