[U-Boot-Users] U-Boot on ARMEB

[U-Boot-Users] U-Boot on ARMEB

[Brian White]

I'm looking at using Das U-Boot on a big-endian IXP based system. 
However, v1.1.4 seems to only come with configuration for the "arm" arch 
(not the "armeb" arch).  Does anybody know what is involved in getting 
u-boot to work with "armeb"?

Thanks!

                                           Brian
                                 ( bcwhite at precidia.com )

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          Only those who dare to fail greatly can ever achieve greatly.

[U-Boot-Users] U-Boot on ARMEB

[Dan Malek]

On Jan 18, 2006, at 2:30 PM, Brian White wrote:

> I'm looking at using Das U-Boot on a big-endian IXP based system. 
> However, v1.1.4 seems to only come with configuration for the "arm" 
> arch (not the "armeb" arch).  Does anybody know what is involved in 
> getting u-boot to work with "armeb"?

It's just a matter of selecting the proper cross tool.  The ixdp425 is 
big
endian, so just use that as an example.  I recently did a port for an 
ixp425
big endian wireless router.  When we are sure the code actually passes
the testing, I'll create a patch, but there is nothing specific to big 
endian
in any of the update.

Thanks.

	-- Dan

[U-Boot-Users] U-Boot on ARMEB

[Brian White]

>> I'm looking at using Das U-Boot on a big-endian IXP based system. 
>> However, v1.1.4 seems to only come with configuration for the "arm" 
>> arch (not the "armeb" arch).  Does anybody know what is involved in 
>> getting u-boot to work with "armeb"?
> 
> It's just a matter of selecting the proper cross tool.  The ixdp425 is big
> endian, so just use that as an example.  I recently did a port for an 
> ixp425
> big endian wireless router.  When we are sure the code actually passes
> the testing, I'll create a patch, but there is nothing specific to big 
> endian
> in any of the update.

That's what I'm figuring out, but it tried to create a link from 
"asm-arm" and I wasn't sure if there were endian dependencies there. 
Can I just link it to "asm-armeb" and have it work?

I think I'm just going to link all my tools so they're available as both 
"armeb-linux" and "arm-linux".  My worry is that something will be 
specifically little-endian somewhere and will be quietly compiled 
incorrectly.

                                           Brian
                                   ( bcwhite at pobox.com )

-------------------------------------------------------------------------------
          Only those who dare to fail greatly can ever achieve greatly.

[U-Boot-Users] U-Boot on ARMEB

[Dan Malek]

On Jan 18, 2006, at 4:04 PM, Brian White wrote:

> That's what I'm figuring out, but it tried to create a link from 
> "asm-arm" and I wasn't sure if there were endian dependencies there. 
> Can I just link it to "asm-armeb" and have it work?

All I did was build some cross tools, called them armeb-gcc, etc.
Then:
	setenv ARCH arm
	setenv CROSS_COMPILE armeb-
	make ixdp425_config
	make

and ended up with a big endian U-Boot.  I started hacking from
there and haven't seen any problems.  If there are any, we have
not found them yet.

> I think I'm just going to link all my tools so they're available as 
> both "armeb-linux" and "arm-linux".  My worry is that something will 
> be specifically little-endian somewhere and will be quietly compiled 
> incorrectly.

I think you worry too much, and naming the same tool by those two 
different
names would seem to be more of a problem than doing it properly.
If the tools are built correctly for big endian ARM, it seems everything
works fine.

I have no further comments on the subject.  Good Luck.  :-)


	-- Dan

[U-Boot-Users] U-Boot on ARMEB

[Brian White]

>> That's what I'm figuring out, but it tried to create a link from 
>> "asm-arm" and I wasn't sure if there were endian dependencies there. 
>> Can I just link it to "asm-armeb" and have it work?
> 
> All I did was build some cross tools, called them armeb-gcc, etc.
> Then:
>     setenv ARCH arm
>     setenv CROSS_COMPILE armeb-
>     make ixdp425_config
>     make

Perfect!  That's exactly what I was looking for.  Thanks!

                                           Brian
                                   ( bcwhite at pobox.com )

-------------------------------------------------------------------------------
          Only those who dare to fail greatly can ever achieve greatly.

[U-Boot-Users] U-Boot on ARMEB

[Stefan Roese]

Hi Dan,

On Wednesday 18 January 2006 20:43, Dan Malek wrote:
> endian, so just use that as an example.  I recently did a port for an
> ixp425
> big endian wireless router.  When we are sure the code actually passes
> the testing, I'll create a patch, but there is nothing specific to big
> endian
> in any of the update.

Did you by any chance enable the interrupts on IXP4xx, so that we could use 
the "standard" U-Boot timer interface "get_timer()", and not this 
"reset_timer_masked()" and "get_timer_masked()" stuff?

Best regards,
Stefan