[U-Boot-Users] MPC8247 and others

[U-Boot-Users] MPC8247 and others

[Ole Andreas Torvmark]

Hi !
We are developing a new board using the new MPC8247 processors from
Motorola.

You guys probably know this already :

MPC8247 is part of a new family of PowerQUICC II processors from
Motorola.
This new family include MPC8247,MPC8248,MPC8271,MPC8272 which are all
derivatives from of the MPC8280 and MPC8260. 

Since I would like to post back patches and add support code for this
CPU back to the U-Boot project I was wondering what is best when
starting :
Add a new directory to cpu, mpc8272 (or something) and copying code from
mpc8260 and changing this or add changes with defines in the MPC8260
directory. The MPC8260 and MPC8247 are very similar but there are some
changes, configuration registers (HRCW is changed among others
(start.S)) and an USB controller etc.

What is the best approach ?

Best regards

Ole Andreas Torvmark
B. Sc. E. E.
R & D Engineer
Radionor Communications AS
Ingvald Ystg?rds Vei 3A
NO7047 Trondheim 
Norway
ole.torvmark at radionor.no
www.radionor.no

[U-Boot-Users] MPC8247 and others

[Glen Wolverton]

I ported u-boot to our custom board with an mpc8248 using the mpc8266ads
board as a starting point and adding to the mpc8260 cpu files.  There is
really not that much of a difference.

Glen Wolverton

-----Original Message-----
From: u-boot-users-admin@lists.sourceforge.net
[mailto:u-boot-users-admin at lists.sourceforge.net] On Behalf Of Ole
Andreas Torvmark
Sent: Friday, February 27, 2004 2:09 AM
To: u-boot-users at lists.sourceforge.net
Subject: [U-Boot-Users] MPC8247 and others


Hi !
We are developing a new board using the new MPC8247 processors from
Motorola.

You guys probably know this already :

MPC8247 is part of a new family of PowerQUICC II processors from
Motorola. This new family include MPC8247,MPC8248,MPC8271,MPC8272 which
are all derivatives from of the MPC8280 and MPC8260. 

Since I would like to post back patches and add support code for this
CPU back to the U-Boot project I was wondering what is best when
starting : Add a new directory to cpu, mpc8272 (or something) and
copying code from mpc8260 and changing this or add changes with defines
in the MPC8260 directory. The MPC8260 and MPC8247 are very similar but
there are some changes, configuration registers (HRCW is changed among
others
(start.S)) and an USB controller etc.

What is the best approach ?

Best regards

Ole Andreas Torvmark
B. Sc. E. E.
R & D Engineer
Radionor Communications AS
Ingvald Ystg?rds Vei 3A
NO7047 Trondheim 
Norway
ole.torvmark at radionor.no
www.radionor.no



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[U-Boot-Users] MPC8247 and others

[Wolfgang Denk]

In message <000501c3fd00$a087d670$9d00a8c0@radionorole> you wrote:
> 
> MPC8247 is part of a new family of PowerQUICC II processors from
> Motorola.
> This new family include MPC8247,MPC8248,MPC8271,MPC8272 which are all
> derivatives from of the MPC8280 and MPC8260. 

Indeed these are derivatives, and not sooo different.

> Since I would like to post back patches and add support code for this
> CPU back to the U-Boot project I was wondering what is best when
> starting :
> Add a new directory to cpu, mpc8272 (or something) and copying code from
> mpc8260 and changing this or add changes with defines in the MPC8260
> directory. The MPC8260 and MPC8247 are very similar but there are some
> changes, configuration registers (HRCW is changed among others
> (start.S)) and an USB controller etc.

I don't think that  differences  are  so  big  that  a  separate  CPU
directory is justified. Please use the existing 8260 directory.

Best regards,

Wolfgang Denk

-- 
Software Engineering:  Embedded and Realtime Systems,  Embedded Linux
Phone: (+49)-8142-4596-87  Fax: (+49)-8142-4596-88  Email: wd at denx.de
Boss, n.: According to the Oxford English Dictionary, in  the  Middle
Ages  the  words  "boss"  and "botch" were largely synonymous, except
that boss, in addition to meaning  "a  supervisor  of  workers"  also
meant "an ornamental stud."

[U-Boot-Users] MPC8247 and others

[Dan Malek]

Wolfgang Denk wrote:

> I don't think that  differences  are  so  big  that  a  separate  CPU
> directory is justified. Please use the existing 8260 directory.

There are minor CPM differences associated with the use of DPRAM by
the FCCs, not properly documented :-)  In particular, if you want
to use the FCC Ethernet, you will have to change the value of
CPM_FCC_SPECIAL_BASE to 0x9000 and ensure the DPRAM allocator knows
there is only 8K of space (not 16, but this probably won't cause
any trouble).


	-- Dan