--- /dev/null
+<!-- 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 -->
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+<HTML
+><HEAD
+><TITLE
+>fis unlock</TITLE
+><meta name="MSSmartTagsPreventParsing" content="TRUE">
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+NAME="GENERATOR"
+CONTENT="Modular DocBook HTML Stylesheet Version 1.76b+
+"><LINK
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+TITLE="eCos Reference Manual"
+HREF="ecos-ref.html"><LINK
+REL="UP"
+TITLE="Flash Image System (FIS)"
+HREF="flash-image-system.html"><LINK
+REL="PREVIOUS"
+TITLE="fis lock"
+HREF="fis-lock-command.html"><LINK
+REL="NEXT"
+TITLE="fis erase"
+HREF="fis-erase-command.html"></HEAD
+><BODY
+CLASS="REFENTRY"
+BGCOLOR="#FFFFFF"
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+VLINK="#840084"
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+CLASS="NAVHEADER"
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+SUMMARY="Header navigation table"
+WIDTH="100%"
+BORDER="0"
+CELLPADDING="0"
+CELLSPACING="0"
+><TR
+><TH
+COLSPAN="3"
+ALIGN="center"
+>eCos Reference Manual</TH
+></TR
+><TR
+><TD
+WIDTH="10%"
+ALIGN="left"
+VALIGN="bottom"
+><A
+HREF="fis-lock-command.html"
+ACCESSKEY="P"
+>Prev</A
+></TD
+><TD
+WIDTH="80%"
+ALIGN="center"
+VALIGN="bottom"
+></TD
+><TD
+WIDTH="10%"
+ALIGN="right"
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+HREF="fis-erase-command.html"
+ACCESSKEY="N"
+>Next</A
+></TD
+></TR
+></TABLE
+><HR
+ALIGN="LEFT"
+WIDTH="100%"></DIV
+><H1
+><A
+NAME="FIS-UNLOCK-COMMAND">fis unlock</H1
+><DIV
+CLASS="REFNAMEDIV"
+><A
+NAME="AEN4257"
+></A
+><H2
+>Name</H2
+>fis unlock -- Unlock flash area</DIV
+><DIV
+CLASS="REFSYNOPSISDIV"
+><A
+NAME="AEN4260"><H2
+>Synopsis</H2
+><P
+><B
+CLASS="COMMAND"
+>fis unlock</B
+> {-f <TT
+CLASS="REPLACEABLE"
+><I
+>flash_address</I
+></TT
+>} {-l <TT
+CLASS="REPLACEABLE"
+><I
+>length</I
+></TT
+>}</P
+></DIV
+><DIV
+CLASS="REFSECT1"
+><A
+NAME="AEN4267"
+></A
+><H2
+>Arguments</H2
+><DIV
+CLASS="INFORMALTABLE"
+><A
+NAME="AEN4269"><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"
+><TT
+CLASS="REPLACEABLE"
+><I
+>flash_address</I
+></TT
+></TD
+><TD
+WIDTH="25%"
+ALIGN="LEFT"
+VALIGN="TOP"
+>Number</TD
+><TD
+WIDTH="25%"
+ALIGN="LEFT"
+VALIGN="TOP"
+>Address of area to be unlocked.</TD
+><TD
+WIDTH="25%"
+ALIGN="LEFT"
+VALIGN="TOP"
+> </TD
+></TR
+><TR
+><TD
+WIDTH="25%"
+ALIGN="LEFT"
+VALIGN="TOP"
+><TT
+CLASS="REPLACEABLE"
+><I
+>length</I
+></TT
+></TD
+><TD
+WIDTH="25%"
+ALIGN="LEFT"
+VALIGN="TOP"
+>Number</TD
+><TD
+WIDTH="25%"
+ALIGN="LEFT"
+VALIGN="TOP"
+>Length of area to be unlocked.</TD
+><TD
+WIDTH="25%"
+ALIGN="LEFT"
+VALIGN="TOP"
+> </TD
+></TR
+></TBODY
+></TABLE
+><P
+></P
+></DIV
+></DIV
+><DIV
+CLASS="REFSECT1"
+><A
+NAME="AEN4294"
+></A
+><H2
+>Description</H2
+><P
+>This command is used to unlock a portion of flash memory forcibly, allowing
+it to be updated. It must be issued for regions which have been locked before
+the FIS can reuse those portions of flash.</P
+><DIV
+CLASS="NOTE"
+><BLOCKQUOTE
+CLASS="NOTE"
+><P
+><B
+>Note: </B
+>Some flash devices power up in locked state and always need to
+be manually unlocked before they can be written to.</P
+></BLOCKQUOTE
+></DIV
+></DIV
+><DIV
+CLASS="REFSECT1"
+><A
+NAME="AEN4299"
+></A
+><H2
+>Examples</H2
+><P
+>Unlock an area of the flash
+<TABLE
+BORDER="5"
+BGCOLOR="#E0E0F0"
+WIDTH="70%"
+><TR
+><TD
+><PRE
+CLASS="SCREEN"
+>RedBoot> <TT
+CLASS="USERINPUT"
+><B
+>fis unlock -f 0xa0040000 -l 0x20000</B
+></TT
+>
+... Unlock from 0xa0040000-0xa0060000: .</PRE
+></TD
+></TR
+></TABLE
+></P
+></DIV
+><DIV
+CLASS="NAVFOOTER"
+><HR
+ALIGN="LEFT"
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+WIDTH="100%"
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+><TR
+><TD
+WIDTH="33%"
+ALIGN="left"
+VALIGN="top"
+><A
+HREF="fis-lock-command.html"
+ACCESSKEY="P"
+>Prev</A
+></TD
+><TD
+WIDTH="34%"
+ALIGN="center"
+VALIGN="top"
+><A
+HREF="ecos-ref.html"
+ACCESSKEY="H"
+>Home</A
+></TD
+><TD
+WIDTH="33%"
+ALIGN="right"
+VALIGN="top"
+><A
+HREF="fis-erase-command.html"
+ACCESSKEY="N"
+>Next</A
+></TD
+></TR
+><TR
+><TD
+WIDTH="33%"
+ALIGN="left"
+VALIGN="top"
+>fis lock</TD
+><TD
+WIDTH="34%"
+ALIGN="center"
+VALIGN="top"
+><A
+HREF="flash-image-system.html"
+ACCESSKEY="U"
+>Up</A
+></TD
+><TD
+WIDTH="33%"
+ALIGN="right"
+VALIGN="top"
+>fis erase</TD
+></TR
+></TABLE
+></DIV
+></BODY
+></HTML
+>
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