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<!-- Copyright (C) 2003 Red Hat, Inc.                                -->
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<HTML
><HEAD
><TITLE
>cache</TITLE
><meta name="MSSmartTagsPreventParsing" content="TRUE">
<META
NAME="GENERATOR"
CONTENT="Modular DocBook HTML Stylesheet Version 1.76b+
"><LINK
REL="HOME"
TITLE="eCos Reference Manual"
HREF="ecos-ref.html"><LINK
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TITLE="Common Commands"
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TITLE="baudrate"
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WIDTH="100%"
BORDER="0"
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><TH
COLSPAN="3"
ALIGN="center"
>eCos Reference Manual</TH
></TR
><TR
><TD
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>Prev</A
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></TD
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><HR
ALIGN="LEFT"
WIDTH="100%"></DIV
><H1
><A
NAME="CACHE-COMMAND">cache</H1
><DIV
CLASS="REFNAMEDIV"
><A
NAME="AEN3044"
></A
><H2
>Name</H2
>cache&nbsp;--&nbsp;Control hardware caches</DIV
><DIV
CLASS="REFSYNOPSISDIV"
><A
NAME="AEN3047"><H2
>Synopsis</H2
><P
><B
CLASS="COMMAND"
>cache</B
>  [on | off]</P
></DIV
><DIV
CLASS="REFSECT1"
><A
NAME="AEN3053"
></A
><H2
>Arguments</H2
><DIV
CLASS="INFORMALTABLE"
><A
NAME="AEN3055"><P
></P
><TABLE
BORDER="1"
CLASS="CALSTABLE"
><THEAD
><TR
><TH
WIDTH="25%"
ALIGN="LEFT"
VALIGN="TOP"
>Name</TH
><TH
WIDTH="25%"
ALIGN="LEFT"
VALIGN="TOP"
>Type</TH
><TH
WIDTH="25%"
ALIGN="LEFT"
VALIGN="TOP"
>Description</TH
><TH
WIDTH="25%"
ALIGN="LEFT"
VALIGN="TOP"
>Default</TH
></TR
></THEAD
><TBODY
><TR
><TD
WIDTH="25%"
ALIGN="LEFT"
VALIGN="TOP"
>on</TD
><TD
WIDTH="25%"
ALIGN="LEFT"
VALIGN="TOP"
>&nbsp;</TD
><TD
WIDTH="25%"
ALIGN="LEFT"
VALIGN="TOP"
>Turn the caches on</TD
><TD
WIDTH="25%"
ALIGN="LEFT"
VALIGN="TOP"
><SPAN
CLASS="emphasis"
><I
CLASS="EMPHASIS"
>none</I
></SPAN
></TD
></TR
><TR
><TD
WIDTH="25%"
ALIGN="LEFT"
VALIGN="TOP"
>off</TD
><TD
WIDTH="25%"
ALIGN="LEFT"
VALIGN="TOP"
>&nbsp;</TD
><TD
WIDTH="25%"
ALIGN="LEFT"
VALIGN="TOP"
>Turn the caches off</TD
><TD
WIDTH="25%"
ALIGN="LEFT"
VALIGN="TOP"
><SPAN
CLASS="emphasis"
><I
CLASS="EMPHASIS"
>none</I
></SPAN
></TD
></TR
></TBODY
></TABLE
><P
></P
></DIV
></DIV
><DIV
CLASS="REFSECT1"
><A
NAME="AEN3080"
></A
><H2
>Description</H2
><P
>The <B
CLASS="COMMAND"
>cache</B
> command is used to manipulate the caches on the processor. </P
><P
>With no options, this command specifies the state of the system caches.</P
><P
>When an option is given, the caches are turned off or on appropriately.</P
></DIV
><DIV
CLASS="REFSECT1"
><A
NAME="AEN3086"
></A
><H2
>Examples</H2
><P
>Show the current cache state.
<TABLE
BORDER="5"
BGCOLOR="#E0E0F0"
WIDTH="70%"
><TR
><TD
><PRE
CLASS="SCREEN"
> 
RedBoot&#62; <TT
CLASS="USERINPUT"
><B
>cache</B
></TT
>
Data cache: On, Instruction cache: On</PRE
></TD
></TR
></TABLE
> </P
><P
>Disable the caches.
<TABLE
BORDER="5"
BGCOLOR="#E0E0F0"
WIDTH="70%"
><TR
><TD
><PRE
CLASS="SCREEN"
> 
RedBoot&#62; <TT
CLASS="USERINPUT"
><B
>cache off</B
></TT
>
RedBoot&#62; <TT
CLASS="USERINPUT"
><B
>cache</B
></TT
>
Data cache: Off, Instruction cache: Off</PRE
></TD
></TR
></TABLE
> </P
><P
>Enable the caches.
<TABLE
BORDER="5"
BGCOLOR="#E0E0F0"
WIDTH="70%"
><TR
><TD
><PRE
CLASS="SCREEN"
> 
RedBoot&#62; <TT
CLASS="USERINPUT"
><B
>cache on</B
></TT
>
RedBoot&#62; <TT
CLASS="USERINPUT"
><B
>cache</B
></TT
>
Data cache: On, Instruction cache: On</PRE
></TD
></TR
></TABLE
> 
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