[U-Boot-Users] Linux port for MPC855T

[U-Boot-Users] Linux port for MPC855T

[David Aldrich]

Hi Steve

I have another question if you don't mind.  Which hardware bring-up tool
do you use?  Being a Wind River user, we have a Vision Probe II.  I
believe that Wind River has a plan to upgrade this tool for use with
Linux, but I wonder if it is of use as is.  

I also see that Wolfgang Denk favours the BDI2000.

Do you have any comments please?

Best regards

David

[U-Boot-Users] Linux port for MPC855T

[nyet at mrv.com]

The vision probe is a useless hunk of junk.

You can probably do very simple hw debugging/bring up, but for anything
serious, its basically a doorstop.

On Fri, Dec 12, 2003 at 07:13:18AM -0800, David Aldrich wrote:
> Hi Steve
> 
> I have another question if you don't mind.  Which hardware bring-up tool
> do you use?  Being a Wind River user, we have a Vision Probe II.  I
> believe that Wind River has a plan to upgrade this tool for use with
> Linux, but I wonder if it is of use as is.  
> 
> I also see that Wolfgang Denk favours the BDI2000.
> 
> Do you have any comments please?
> 
> Best regards
> 
> David
> 
> 
> 
> -------------------------------------------------------
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[U-Boot-Users] Linux port for MPC855T

[Steve Gray]

I using a Vision ice probe II, as that what we had when we used vxWorks.
I used it from an NT workstation just to flash and get the u-boot registers
correct. Once u-boot is running i havnt used the probe.
U-boot has the capability to erase and program flash using serial or
network.
Worked for me.

Regards
	Steve


-----Original Message-----
From: David Aldrich [mailto:david.aldrich at t-modus.nec.co.uk]
Sent: 12 December 2003 15:13
To: 'Steve Gray'
Cc: 'u-boot-users at lists.sourceforge.net'
Subject: RE: [U-Boot-Users] Linux port for MPC855T


Hi Steve

I have another question if you don't mind.  Which hardware bring-up tool
do you use?  Being a Wind River user, we have a Vision Probe II.  I
believe that Wind River has a plan to upgrade this tool for use with
Linux, but I wonder if it is of use as is.  

I also see that Wolfgang Denk favours the BDI2000.

Do you have any comments please?

Best regards

David



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[U-Boot-Users] Linux port for MPC855T

[David Aldrich]

Hi Wolfgang

> Nonsense. Of course there are archives. Just look under "Lists".

My remark was not nonsense.  Sourceforge currently states "not yet
archived" for the u-boot users' list.  Perhaps it is a temporary
problem.

> Please send your next posting without such a silly trailer.

Sorry about the silly trailer. It is added automatically by our email
server.  I have requested that this newsgroup be added to the exclusion
list.  Takes a while to organise and test.  Please forgive me if it
appears in this message - if so I will investigate the problem.

Finally, would you like to give a precise definition of the term BSP in
the context of Linux (there seems some uncertainty in this thread about
the term).

Thanks for your reply.

David

[U-Boot-Users] Linux port for MPC855T

[Udi Finkelstein]

David Aldrich wrote:
> Hi Wolfgang
> 
> 
>>Nonsense. Of course there are archives. Just look under "Lists".
> 
> 
> My remark was not nonsense.  Sourceforge currently states "not yet
> archived" for the u-boot users' list.  Perhaps it is a temporary
> problem.
> 

You are right. Many SF netlists tends to have their archive status 
listed sometimes as "not archived", when in fact it is. I assume it will 
return in a few days.
SF has many problems, and this is just one of those.

Udi

[U-Boot-Users] Linux port for MPC855T

[Wolfgang Denk]

In message <0E8A20F2EB7BD7119C1F00508BB333780E5CF9@tmservermail02.t-modus.nec.co.uk> you wrote:
> 
> > Nonsense. Of course there are archives. Just look under "Lists".
> 
> My remark was not nonsense.  Sourceforge currently states "not yet
> archived" for the u-boot users' list.  Perhaps it is a temporary
> problem.

Sorry for the harsh words. Indeed there seems to be  a  problem  with
SF's  mailing  list  services  (I  get  a  nice  "Warning: SQL error:
[IBM][CLI Driver] SQL30081N A communication error has been  detected.
..." error messages when trying to access the archive).

A bug has been filed.


> > Please send your next posting without such a silly trailer.
> 
> Sorry about the silly trailer. It is added automatically by our email
> server.  I have requested that this newsgroup be added to the exclusion

Such trailers make no sense from a legal point of view. They are just
a waste of  bandwith  and  storage  capacity.  Digital  environmental
pollution.

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
Old programmers never die, they just branch to a new address.

[U-Boot-Users] Linux port for MPC855T

[Wolfgang Denk]

In message <0E8A20F2EB7BD7119C1F00508BB333780E5CF9@tmservermail02.t-modus.nec.co.uk> you wrote:
> My remark was not nonsense.  Sourceforge currently states "not yet
> archived" for the u-boot users' list.  Perhaps it is a temporary
> problem.

The mailing list archives seem to be up again.

See http://sourceforge.net/mailarchive/forum.php?forum=u-boot-users


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
"Wagner's music is better than it sounds."               - Mark Twain

[U-Boot-Users] Linux port for MPC855T

[David Aldrich]

Hi Steve

Thanks for replying. I will now try to digest this information!

David


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[U-Boot-Users] Linux port for MPC855T

[Steve Gray]

Hi david

from what i have seen so far.
the u-boot applies the upm tables, in the same way maybe your rominit.s did
before ??
the word BSP i think may be confusing in linux terminology. BSP i think is a
windriver term that has been
distorted somewhat. IMHO BSP should stick with vxWorks and bootloader should
be used in the linux field.

The idea of the bootloader "BSP" is to bring sufficent hardware drivers up
to start the RTOS.
So for example the bootloader may need FLASH,SDRAM. To start development you
will need a little more
than that, u may need serial and ethernet, ( you will for u-boot
development)
I guess any other device drivers can be started by the kernel insmod.o, say
if you have other specialist 
devices like a quadfalc in our case. Although i am not that far yet 

Im sure someone out there will comment if i am incorrect or misinformed.

I have Redhat 	9.0
u-boot		1.0.0
eldk			2.1.0 patched  to 2.2.0
linux_2_4_devel 	CVS from denx.de
Have a Vision ICE probe II for programming the inital u-boot.

once u-boot is programmed and working u can use u-boot to tftp a linux
kernel image into RAM
then burn it into flash, the boot from that.
Once you have the kernel in flash u can set u-boot to auto run it.
Much the same way as the windriver BSP menu works.



-----Original Message-----
From: David Aldrich [mailto:david.aldrich at t-modus.nec.co.uk]
Sent: 10 December 2003 11:23
To: 'Steve Gray'
Cc: 'u-boot-users at lists.sourceforge.net'
Subject: RE: [U-Boot-Users] Linux port for MPC855T


Hi Steve

Thanks very much for your reply.

I do not fully understand the roles of the boot loader and the BSP.  In
the normal case, would the UPM be programmed by u-boot, or must the
kernel also be aware of it?

Specifically, when we talk about Linux BSP, are we talking about the
boot loader or the device drivers or both?

Where would I find the UPM table values in the VxWorks BSP?

Sorry, if these are ignorant questions.  I am more of an application
programmer than a BSP programmer.

Finally, which Linux disctribution and hardware bring-up tools are you
using?

Thanks

David



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or agent responsible for delivering the message to the intended recipient,
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[U-Boot-Users] Linux port for MPC855T

[Wolfgang Denk]

In message <2E6FE17ED9336449B70E4AC6C5CF50020591E7@TBSMAIL> you wrote:
> 
> the word BSP i think may be confusing in linux terminology. BSP i think is a

No, BSP os actually pretty well defined and is not restricted  to  or
invented by WRS.

> distorted somewhat. IMHO BSP should stick with vxWorks and bootloader should
> be used in the linux field.

No, boot loader and BSP are different entities.

> The idea of the bootloader "BSP" is to bring sufficent hardware drivers up

There is no such thing as a bootloader  "BSP",  except  you  want  to
split up U-Boot in parts.


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
[Braddock:] Mr. Churchill, you are drunk.
[Churchill:] And you madam, are ugly.  But I shall be sober tomorrow.

[U-Boot-Users] Linux port for MPC855T

[David Aldrich]

Hi Steve

Thanks very much for your reply.

I do not fully understand the roles of the boot loader and the BSP.  In
the normal case, would the UPM be programmed by u-boot, or must the
kernel also be aware of it?

Specifically, when we talk about Linux BSP, are we talking about the
boot loader or the device drivers or both?

Where would I find the UPM table values in the VxWorks BSP?

Sorry, if these are ignorant questions.  I am more of an application
programmer than a BSP programmer.

Finally, which Linux disctribution and hardware bring-up tools are you
using?

Thanks

David



Telecom MODUS is an ISO9001/TickIT approved Company.
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[U-Boot-Users] Linux port for MPC855T

[Wolfgang Denk]

In message <0E8A20F2EB7BD7119C1F00508BB333780E5CEB@tmservermail02.t-modus.nec.co.uk> you wrote:
> I do not fully understand the roles of the boot loader and the BSP.  In

The boot loader initializes the hardware. The  [Linux]  BSP  is  that
part  of  Linux  or  modifications to the Linux kernel that deal with
board specific stuff like which I/O pin needs to be set  to  high  to
enable the ethernet PHY.

> the normal case, would the UPM be programmed by u-boot, or must the
> kernel also be aware of it?

The initialization of the memory controller (which is mor  than  just
preogramming  the  UPM)  is  done in the boot loader. The kernel just
expects working memory.

> Specifically, when we talk about Linux BSP, are we talking about the
> boot loader or the device drivers or both?

The Linux BSP is the Linux BSP; the boot loader is the  boot  loader;
device  drivers  are device drivers - either U-Boot device drivers or
Linux device drivers. These things are mostly orthogonal.

> Where would I find the UPM table values in the VxWorks BSP?

Use grep?

> Finally, which Linux disctribution and hardware bring-up tools are you
> using?

We use the ELDK (what else? :-) and BDI2000's.

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
Is truth not truth for all?
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		   the Sky", stardate 5476.4.

[U-Boot-Users] Linux port for MPC855T

[Steve Gray]

Hi David
Your doing exactly the same thing that i am doing right now :)
We too are evaluating Linux, but Im trying to evaluate it without any 3rd
party 
costs involed. i.e paying monta vista to do the work for us and not learning
a thing in the process.

We use vxWorks on an 860T, and Im using u-boot to get linux running on it.

[U-Boot-Users] Linux port for MPC855T

[David Aldrich]

Hi

I have newly subscribed to this mailing list.  I notice that neither the
ppcboot nor the uboot lists are presently archived on Sourceforge, so I
cannot see how active the lists are.  I wish to discuss Linux BSPs for
MPC855T.  Is the uboot list appropriate for such discussion?

I am evaluating the use of Embedded Linux on MPC860 PowerPC,
specifically the MPC855T.  I am currently requesting quotations from
Linux suppliers to port Linux to our 855T card.  Currently, we run
VxWorks on this card so a VxWorks BSP is fully tested.  

I know that a major part of the port will be programming the 855T's UPM
(User Programmable Machine) that is responsible for setting up memory
controller, CPU core etc.  I would like advice on how to handle this.

- Should such setup be already available in an open source Linux MPC860
BSP?
- Should I try to make use of our existing BSP?
- Is it reasonable for the supplier to quote for BSP development or
should they be using open source code?

I will be grateful for any advice, as this is a very new area for me.

Best regards

David



Telecom MODUS is an ISO9001/TickIT approved Company.
LRQA Certificate of Approval reference 0965133
************************************************************
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[U-Boot-Users] Linux port for MPC855T

[Wolfgang Denk]

In message <0E8A20F2EB7BD7119C1F00508BB333780E5CEA@tmservermail02.t-modus.nec.co.uk> you wrote:
> 
> I have newly subscribed to this mailing list.  I notice that neither the
> ppcboot nor the uboot lists are presently archived on Sourceforge, so I

Nonsense. Of course there are archives. Just look under "Lists".

> cannot see how active the lists are.  I wish to discuss Linux BSPs for
> MPC855T.  Is the uboot list appropriate for such discussion?

No. U-Boot-Users is - as the name suggests - for  discussion  of  the
U-Boot boot loader.

> - Should such setup be already available in an open source Linux MPC860
> BSP?

No. Linux does not care about  hardware  setup.  It  expects  just  a
sufficient amount of working memory. The initialization of the memory
is a job for a boot loader.

> - Should I try to make use of our existing BSP?

Ye, of course, as this will save you effort and frustration.

> - Is it reasonable for the supplier to quote for BSP development or
> should they be using open source code?

2 x yes.

> LRQA Certificate of Approval reference 0965133
> ************************************************************
> THIS MESSAGE IS INTENDED ONLY FOR THE USE OF THE INDIVIDUAL TO WHOM IT IS ADDRESSED AND CONTAINS INFORMATION THAT IS PRIVATE AND/OR PROPRIETARY.
...

Please send your next posting without such a silly trailer.


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
Bus error -- driver executed.