Re: lots of easy questions about eboot/nk startup
From: Andrew (anonymous_at_discussions.microsoft.com)
Date: 03/10/04
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Date: Wed, 10 Mar 2004 15:06:40 -0800
Yannick, what is a "golden unit"?
>-----Original Message-----
>1/ you can set in image settings under PB if you want to
maintain eboot
>space when copying NK in RAM or if it can be overwritten.
>
>2/ NK.BIN is not a compressed format : it is binary
record files (a record
>consist in a start address, a length and datas). It
allows to avoid
>including '0' in the image, but it is not compressed
more than that.
>You can activate compression in your image for some
modules, but it will be
>uncompressed at execution, not when loading from flash
to RAM.
>If you want to use compression, you have to update your
bootloader to
>implement the decompression algorithm in it.
>
>3/ ??? I think you're talking about multi bin
architecture : this
>architecture allows you splitting the content of your
image in different bin
>files, which can be mounted separately, or even at
execution time (a kind of
>paging). By default, PB includes all features in one bin
file : NK.BIN, so
>it is ok if your driver is in NK.BIN
>
>4/ Yes, but it has to be taken in account in CONFIG.BIB
file when you define
>where the various memory area are located : you can test
on the activation
>of this flag to define if your NK.BIN will overwrite
EBOOT.BIN or not (be
>careful : when downloading NK.BIN from flash to RAM,
eboot.bin is still
>executing, so you might have some issues if you don't
maintain eboot space
>in memory)
>
>5/ No it is using a TFTP server (implemented in eboot) +
BOOTP commands.
>KITL is activated once kernel is started for debugging.
>
>6/ MAybe you should maintain a download support in eboot
that can be
>activated through a specifc mode (on a GPIO, or smthg
like that). You can
>support download on eboot without activating kernel
debugging on CE device,
>which allows you to free the download link once download
is done for
>applicative usage.
>Another way is to directly burn your flash from
a "golden unit"
>
>Best regards,
>Yannick
>
>--
>---------------------------------------------------------
-------
>Yannick Chamming's (eMVP)
>ADESET
>Windows Embedded Manager
>ychammings AT adeset DOT com>
>http://www.adeset.com
>Tél : +33 (0)4.72.18.57.77
>Fax : +33 (0)4.72.18.57.78
>---------------------------------------------------------
-------
>
>"Andrew" <anonymous@discussions.microsoft.com> wrote in
message
>news:99bb01c405a6$b6727180$a101280a@phx.gbl...
>> Hi All,
>>
>> I have a few questions which would help me greatly if
>> answered or if you could point me to a URL that would
>> provide the info. Sometimes the PB help can be
cryptic,
>> outdated and/or platform specific (CEPC). This seems
>> like very basic pieces of information but your answers
or
>> location of the answers would be appreciated. I'm
using
>> the XSC1BD BSP with eboot and PB 4.2.
>>
>> 1) Does eboot use any RAM after the Kernel is started
>> (does it stay resident)?
>>
>> 2) Is there an existing method of compressing NK.bin in
>> flash and extracted into RAM when the device boots or
do
>> I have to perform this in my bootloader myself? Or is
NK
>> already compressed?
>>
>> 3) I read in the PB help that there is a NK image and a
>> Driver image. My drivers appear to be included in my
NK
>> image. Is this correct?
>>
>> 4) I read in the PB help that there is a "Enable Eboot
>> Space in Memory" under the build options tab. Does
this
>> actually exist?
>>
>> 5) Is the downloading of the NK image in PB (after
eboot
>> has started) via the KITL transport? I know that CESH
>> and the debug interface (stepping/breakpoints) do.
>>
>> 6) If in the future I want to concrete my bootloader
and
>> disable all download/kitl/serial etc and just have it
>> start the current image burned into flash, how do I
>> download a new NK image in the future? Is there a
>> current method through PB/KITL? Can I just overwrite
the
>> image in flash and restart the device with an
application?
>>
>> Cheers, Andrew
>>
>>
>
>
>.
>
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