Hello Kevin Alexander,
On 01/11/2016 03:13 PM, Kevin Alexander wrote:
Hello
I am making a bigeffort to try to acquire knowledge regarding embedded Linux.
A big effort is a great idea. A long association is also beneficial as a
lot of stuff happens that is not documented well (or at all) and being
around provides for exposure to this type of change.
Myprimary reference is the book entitled 'Embedded Linux Primer, SecondEdition
A Practical, Real-World Approach' by Christopher Hallinan,published 2010
U-Boot has recently (at least when compared to the time taken to write
and publish a book) gone through three major changes that I'm aware of.
My work includes some U-Boot customization so I have some exposure to
this, but I'm anything but an expert or core U-Boot developer.
1) The configuration system has changed from one based primarily on
large number of #define in header files to something based closely on
KConfig as used in the Linux kernel.
2) The build system has moved quite close to KBuild as used in the Linux
kernel.
3) A unified device driver model has been introduced and conversion of
existing drivers is currently under way.
I have reachedchapter 7, 'Bootloaders', and I am having a few problems with
thischapter. In section 7.3 it starts to make mention of u-boot. Aftergit
cloning and examining the latest u boot source tree, it isapparent that the
description in the book about how to configure andbuild u-boot is not congruent
the latest u-boot source tree. Cansomeone reply to this message, or point me
to a(nother) mailing list(s),wikis or urls that would allow me to acquire a
good understanding onhow configure and build u-boot as represented by the
latest u-bootsource tree.
I'm not sure official U-Boot documentation has been modified yet to
reflect these changes. Even if it had, it is likely to assume
familiarity with the Linux kernel KConfig and KBuild systems. Referring
to the Linux documentation for these subsystems might be helpful in
understanding how the similar U-Boot facilities operate.
The main documentation for U-Boot is the README file at the top
directory level. Also, see files in the doc subdirectory. However, as I
said, don't be too surprised if these sources are not up to date.
Many thanks in advance
Good luck, and welcome to U-Boot.
If you end up developing understanding of these parts of the system by
exploration, others in the community (like me) and other newbie's could
really benifit from your knowledge. Please consider writing up what you
find and submitting patches to README (or the wiki at
http://www.denx.de/wiki/DULG/Manual)
Best Regards,
Jim
--
Jim Chargin
AJA Video Systems j...@aja.com
(530) 271-3334 http://www.aja.com
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