ipaq.html

有关ecos2。0介绍了实时嵌入式的结构以及线程调度的实现和内存的管理等

><P
>Using OSloader on the iPAQ, select the <SPAN
CLASS="GUIMENUITEM"
>Tools-&#62;Flash-&#62;Save
to files...</SPAN
>.  menu item.</P
></LI
><LI
><P
>Four (4) files, 4MB each in size will be created.</P
></LI
><LI
><P
>After each file is created, copy the file to your computer,
then delete the file from the iPAQ to make room in the WinCE ramdisk for the
next file.</P
></LI
></UL
></P
></TD
></TR
></TABLE
></DIV
>You will need to download the version of RedBoot designed as the
ROM bootstrap. Then install it permanently  using these commands:
 <TABLE
BORDER="5"
BGCOLOR="#E0E0F0"
WIDTH="70%"
><TR
><TD
><PRE
CLASS="SCREEN"
>RedBoot&#62; <TT
CLASS="USERINPUT"
><B
>lo -r -b 0x100000 redboot_ROM.bin</B
></TT
>
RedBoot&#62; <TT
CLASS="USERINPUT"
><B
>fi loc -f 0x50000000 -l 0x40000</B
></TT
>
RedBoot&#62; <TT
CLASS="USERINPUT"
><B
>fis init</B
></TT
>
RedBoot&#62; <TT
CLASS="USERINPUT"
><B
>fi unl -f 0x50040000 -l 0x40000</B
></TT
>
RedBoot&#62; <TT
CLASS="USERINPUT"
><B
>fi cr RedBoot -b 0x100000</B
></TT
>
RedBoot&#62; <TT
CLASS="USERINPUT"
><B
>fi loc -f 0x50040000 -l 0x40000</B
></TT
>
RedBoot&#62; <TT
CLASS="USERINPUT"
><B
>reset</B
></TT
></PRE
></TD
></TR
></TABLE
>

<DIV
CLASS="WARNING"
><P
></P
><TABLE
CLASS="WARNING"
BORDER="1"
WIDTH="100%"
><TR
><TD
ALIGN="CENTER"
><B
>WARNING</B
></TD
></TR
><TR
><TD
ALIGN="LEFT"
><P
>You must type these commands exactly! Failure to do so may render your
iPAQ totally useless. Once you've done this, RedBoot should come up every
time you reset.</P
></TD
></TR
></TABLE
></DIV
></P
></DIV
><DIV
CLASS="SECT3"
><H3
CLASS="SECT3"
><A
NAME="AEN6017">Restoring Windows/CE</H3
><P
>To restore Windows/CE from the backup taken in <A
HREF="ipaq.html#IPAQ-INSTALL-RB-PERMANENTLY"
>the Section called <I
>Installing RedBoot permanently</I
></A
>,
visit <A
HREF="http://www.handhelds.org/projects/wincerestoration.html"
TARGET="_top"
>http://www.handhelds.org/projects/wincerestoration.html</A
>
for directions.</P
></DIV
></DIV
><DIV
CLASS="SECT2"
><H2
CLASS="SECT2"
><A
NAME="AEN6022">Additional commands</H2
><P
>The <B
CLASS="COMMAND"
>exec</B
> command which allows the loading
and execution of Linux kernels,
is supported for this board (see <A
HREF="executing-programs.html"
>the Section called <I
>Executing Programs from RedBoot</I
> in Chapter 2</A
>). The <B
CLASS="COMMAND"
>exec</B
> parameters used for the iPAQ are:</P
><P
></P
><DIV
CLASS="VARIABLELIST"
><DL
><DT
>-b <TT
CLASS="REPLACEABLE"
><I
>&lt;addr&#62;</I
></TT
></DT
><DD
><P
>Location Linux kernel was loaded to</P
></DD
><DT
>-l <TT
CLASS="REPLACEABLE"
><I
>&lt;len&#62;</I
></TT
></DT
><DD
><P
>Length of kernel</P
></DD
><DT
>-c <TT
CLASS="REPLACEABLE"
><I
>"params"</I
></TT
></DT
><DD
><P
>Parameters passed to kernel</P
></DD
><DT
>-r <TT
CLASS="REPLACEABLE"
><I
>&lt;addr&#62;</I
></TT
></DT
><DD
><P
>'initrd' ramdisk location</P
></DD
><DT
>-s <TT
CLASS="REPLACEABLE"
><I
>&lt;len&#62;</I
></TT
></DT
><DD
><P
>Length of initrd ramdisk</P
></DD
></DL
></DIV
><P
>Linux kernels may be run on the iPAQ using the sources from the anonymous
CVS repository at the Handhelds project (<A
HREF="http://www.handhelds.org/"
TARGET="_top"
>http://www.handhelds.org/</A
>) with
the <TT
CLASS="FILENAME"
>elinux.patch</TT
> patch file applied. This file can be
found in the
<TT
CLASS="FILENAME"
>misc/</TT
> subdirectory of the iPAQ platform HAL in the
RedBoot sources, normally
<TT
CLASS="FILENAME"
>hal/arm/sa11x0/ipaq/<TT
CLASS="REPLACEABLE"
><I
>VERSION</I
></TT
>/misc/</TT
>
  </P
><P
>On the iPAQ (and indeed all SA11x0 platforms), Linux expects to be loaded
at address 0xC0008000 and the entry point is also at 0xC0008000.</P
></DIV
><DIV
CLASS="SECT2"
><H2
CLASS="SECT2"
><A
NAME="AEN6061">Memory Maps</H2
><P
>RedBoot sets up the following memory map on the iPAQ:   The first level
page table is located at physical address 0xC0004000.  No second level tables
are used.   <DIV
CLASS="NOTE"
><BLOCKQUOTE
CLASS="NOTE"
><P
><B
>NOTE: </B
>The virtual memory maps in this section use a C and B column to indicate
whether or not the region is cached (C) or buffered (B).</P
></BLOCKQUOTE
></DIV
> <TABLE
BORDER="5"
BGCOLOR="#E0E0F0"
WIDTH="70%"
><TR
><TD
><PRE
CLASS="PROGRAMLISTING"
>Physical Address Range     Description
-----------------------    ----------------------------------
0x00000000 - 0x01ffffff    16Mb to 32Mb FLASH (nCS0) [organized as below]
  0x000000 - 0x0003ffff      Parrot Loader
  0x040000 - 0x0007ffff      RedBoot
  0xf80000 - 0x00fbffff      Fconfig data
  0xfc0000 - 0x00ffffff      FIS directory
0x30000000 - 0x3fffffff    Compact Flash
0x48000000 - 0x4bffffff    iPAQ internal registers
0x80000000 - 0xbfffffff    SA-1110 Internal Registers
0xc0000000 - 0xc1ffffff    DRAM Bank 0 - 32Mb SDRAM
0xe0000000 - 0xe7ffffff    Cache Clean


Virtual Address Range    C B  Description
-----------------------  - -  ----------------------------------
0x00000000 - 0x01ffffff  Y Y  DRAM - 32Mb
0x30000000 - 0x3fffffff  N N  Compact Flash
0x48000000 - 0x4bffffff  N N  iPAQ internal registers
0x50000000 - 0x51ffffff  Y Y  Up to 32Mb FLASH (nCS0)
0x80000000 - 0xbfffffff  N N  SA-1110 Internal Registers
0xc0000000 - 0xc1ffffff  N Y  DRAM Bank 0: 32Mb
0xe0000000 - 0xe7ffffff  Y Y  Cache Clean   </PRE
></TD
></TR
></TABLE
> </P
></DIV
><DIV
CLASS="SECT2"
><H2
CLASS="SECT2"
><A
NAME="AEN6068">Rebuilding RedBoot</H2
><P
>These shell variables provide the platform-specific information
needed for building RedBoot according to the procedure described in
<A
HREF="rebuilding-redboot.html"
>Chapter 3</A
>:
<TABLE
BORDER="5"
BGCOLOR="#E0E0F0"
WIDTH="70%"
><TR
><TD
><PRE
CLASS="PROGRAMLISTING"
>export TARGET=ipaq
export ARCH_DIR=arm
export PLATFORM_DIR=sa11x0/ipaq</PRE
></TD
></TR
></TABLE
></P
><P
>The names of configuration files are listed above with the
description of the associated modes.</P
></DIV
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