1<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"> 2<HTML> 3<HEAD> 4<META http-equiv="Content-Type" content="text/html; charset=windows-1252"> 5<META name="GENERATOR" content="IBM WebSphere Studio Homepage Builder Version 7.0.0.0 for Windows"> 6<META http-equiv="Content-Style-Type" content="text/css"> 7<TITLE>IC_Unlockdown</TITLE> 8<LINK rel="stylesheet" href="../../css/nitro.css" type="text/css"> 9</HEAD> 10<BODY> 11<H1 align="left">IC_Unlockdown <IMG src="../../image/NTR.gif" align="middle"><IMG src="../../image/TWL.gif" align="middle"></H1> 12<H2>Syntax</H2> 13<DL> 14 <DD> 15 <PRE><CODE>#include <nitro/os.h></CODE></PRE> 16 <PRE><CODE>void IC_Unlockdown( u32 num );</CODE></PRE> 17</DL> 18<H2>Arguments</H2> 19<TABLE border="1" width="100%"> 20 <TBODY> 21 <TR> 22 <TD width="13%"><EM><STRONG>num</STRONG></EM></TD> 23 <TD width="87%">Designates the number of lockdown blocks to deallocate.</TD> 24 </TR> 25 </TBODY> 26</TABLE> 27<H2>Return Values</H2> 28<P>None.</P> 29<H2>Description</H2> 30<P>Instruction cache can be locked with <A href="IC_LockdownRange.html"><CODE>IC_LockdownRange()</CODE></A>, which prevents the cache from being deleted. <code>IC_Unlockdown</code> releases the instruction cache to be deleted when the cache is replaced. This function releases, in order, a <EM><STRONG><CODE>num</CODE></STRONG></EM> number of lockdown blocks from the region that was last locked with the <A href="IC_LockdownRange.html"><CODE>IC_LockdownRange()</CODE></A> function. There are a maximum of three configurable lockdown blocks, so the maximum number of lockdown blocks designated with <EM><STRONG><CODE>num</CODE></STRONG></EM> is also three. 31</P> 32<H2>Internal Operation</H2> 33<P>Operates registers 7 and 9 of the system control coprocessor.</P> 34<H2>See Also</H2> 35<P><CODE><A href="IC_LockdownRange.html">IC_LockdownRange</A>,<A href="IC_UnlockdownAll.html">IC_UnlockdownAll</A></CODE></P> 36<H2>Revision History</H2> 37<P>2005/01/21 Initial version.</P> 38<hr><p>CONFIDENTIAL</p></body> 39</HTML>
