[ECOS] Big Endian port

[ECOS] Big Endian port

[Agarwal, Lomesh]

I am trying to port RedBoot for Xscale from Little endian to Big endian. Can
someone help me in identifying the items I need to take care.

Thanks,
Lomesh

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[ECOS] Converting Binaries for LEON CPU

[Andrew Lai]

Hi all,

I have a particular file called "tm_basic.o", which was produced in the 
eCos development environment.  Have been experimenting with eCos over the 
LEON.  "tm_basic.o" was compiled in the eCos environment.  The question is:

How to convert tm_basic.o into a form that can be run by LEON and TSIM?

I suspect that I should be using sparc-rtems-objcopy.  Have tried this 
without success.  Am probably missing something in the switches.  This the 
why i've used the command:

sparc-rtems-objcopy -O elf32-sparc tm_basic.o tm_basic
sparc-rtems-objcopy -O srec tm_basic.o tm_basic.srec

Am I missing something?

Regards,
Andrew Lai 


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Re: [ECOS] Big Endian port

[Jonathan Larmour]

"Agarwal, Lomesh" wrote:
> 
> I am trying to port RedBoot for Xscale from Little endian to Big endian. Can
> someone help me in identifying the items I need to take care.

The biggest problem is usually interfacing with devices. Depending on the
hardware you may need to byte swap every time you access them. A driver
expecting LE all the time wouldn't expect this.

The generic ARM HAL supports big endian operation though - we have it for
ye olde PID.

Jifl
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Re: [ECOS] Converting Binaries for LEON CPU

[Jonathan Larmour]

Andrew Lai wrote:
> 
> Hi all,
> 
> I have a particular file called "tm_basic.o", which was produced in the
> eCos development environment.  Have been experimenting with eCos over the
> LEON.  "tm_basic.o" was compiled in the eCos environment.  The question is:
> 
> How to convert tm_basic.o into a form that can be run by LEON and TSIM?
> 
> I suspect that I should be using sparc-rtems-objcopy.  Have tried this
> without success.  Am probably missing something in the switches.  This the
> why i've used the command:
> 
> sparc-rtems-objcopy -O elf32-sparc tm_basic.o tm_basic
> sparc-rtems-objcopy -O srec tm_basic.o tm_basic.srec

Don't bother with the .o file - that's not the test. You need to use the
test executable which should be in the "tests" directory underneath your
install tree.

Jifl
-- 
Red Hat, Rustat House, Clifton Road, Cambridge, UK. Tel: +44 (1223) 271062
Maybe this world is another planet's Hell -Aldous Huxley || Opinions==mine

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