* [ECOS] StrongARM SA1110
@ 2001-03-05 6:13 Warren Jasper
2001-03-05 6:22 ` Lewin A.R.W. Edwards
0 siblings, 1 reply; 4+ messages in thread
From: Warren Jasper @ 2001-03-05 6:13 UTC (permalink / raw)
To: ecos-discuss
--
I am trying to port eCos to a development board which uses the
Intel StrongARM SA1110. I have 2 questions.
1. In your instructions for the tools set, is the default
Little Endian or Big Endian. Is there a way to tell if
the cross compiler is configured one way or the other by default?
I know about the -EB and -EL flags. The cross compiler is
called arm-elf-gcc
2. I configured eCos for the target assabet, which appears to the
the correct target for the StrongARM SA 1110. Since the StrongARM
is basically a SOC, a general Boot ROM Monitor should get me
started. I have 4 MB of Flash Boot ROM on the board.
What is the exact name of the file that I should use to load into
FLASH? If one is precompiled, is it for Big or Little Endian?
Thanks,
-- Warren
Warren J. Jasper
wjasper@tx.ncsu.edu
^ permalink raw reply [flat|nested] 4+ messages in thread
* Re: [ECOS] StrongARM SA1110
2001-03-05 6:13 [ECOS] StrongARM SA1110 Warren Jasper
@ 2001-03-05 6:22 ` Lewin A.R.W. Edwards
2001-03-13 10:26 ` Jonathan Larmour
0 siblings, 1 reply; 4+ messages in thread
From: Lewin A.R.W. Edwards @ 2001-03-05 6:22 UTC (permalink / raw)
To: Warren Jasper, ecos-discuss
>1. In your instructions for the tools set, is the default
> Little Endian or Big Endian. Is there a way to tell if
In general it seems Red Hat prefers little-endian. Past discussions on this
list have indicated that not everything is guaranteed to work in big-endian
mode.
> the cross compiler is configured one way or the other by default?
> I know about the -EB and -EL flags. The cross compiler is
> called arm-elf-gcc
Have you tried a simple test program?
int main(void) {
unsigned int u;
unsigned char *p;
u = 0x12345678u;
p = (unsigned char *) &u;
printf("%2X:%2X:%2X:%2X\n",*p,*(p+1),*(p+2),*(p+3));
}
I don't know exact answers to your second question, but if you did an
"ecosconfig new assabet redboot" and then "ecosconfig tree" then "make" you
would wind up with the RedBoot debugger/loader for the Assabet board.
Exactly how to load this onto the target board varies with hardware. I'm
using ARM, not SA, so I can't advise much there :) THe closest document I
can see is
< http://sources.redhat.com/ecos/docs-latest/tutorials/arm/ecos-tutorial.d.html#pgfId=2562385 >.
=== Lewin A.R.W. Edwards (Embedded Engineer)
Work: http://www.digi-frame.com/
Personal: http://www.zws.com/ and http://www.larwe.com/
"Und setzet ihr nicht das Leben ein,
Nie wird euch das Leben gewonnen sein."
^ permalink raw reply [flat|nested] 4+ messages in thread
* Re: [ECOS] StrongARM SA1110
2001-03-05 6:22 ` Lewin A.R.W. Edwards
@ 2001-03-13 10:26 ` Jonathan Larmour
2001-03-13 10:38 ` Lewin A.R.W. Edwards
0 siblings, 1 reply; 4+ messages in thread
From: Jonathan Larmour @ 2001-03-13 10:26 UTC (permalink / raw)
To: Lewin A.R.W. Edwards; +Cc: Warren Jasper, ecos-discuss
"Lewin A.R.W. Edwards" wrote:
>
> >1. In your instructions for the tools set, is the default
> > Little Endian or Big Endian. Is there a way to tell if
>
> In general it seems Red Hat prefers little-endian.
More specifically, most eval board vendors prefer little-endian. We can
only follow them.
> Past discussions on this
> list have indicated that not everything is guaranteed to work in big-endian
> mode.
We do test big-endian operation on certain platforms. Some device drivers
may not have been tested on a big-endian platform though (although that's
not to say they won't work). Do you have any specific problems to report?
> I don't know exact answers to your second question, but if you did an
> "ecosconfig new assabet redboot" and then "ecosconfig tree" then "make" you
> would wind up with the RedBoot debugger/loader for the Assabet board.
> Exactly how to load this onto the target board varies with hardware. I'm
> using ARM, not SA, so I can't advise much there :) THe closest document I
> can see is
> < http://sources.redhat.com/ecos/docs-latest/tutorials/arm/ecos-tutorial.d.html#pgfId=2562385 >.
Instead look at:
http://sources.redhat.com/ecos/docs-latest/redboot/redboot.7.html#pgfId=2688227
for the Assabet.
Also just doing "ecosconfig new assabet redboot" may be sufficient but is
not really complete. As mentioned at
http://sources.redhat.com/ecos/docs-latest/redboot/redboot.5.html#pgfId=2639328
you should use configuration export files supplied with each platform. So
for the assabet, look in hal/arm/sa11x0/assabet/current/misc/ for the .ecm
files.
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
^ permalink raw reply [flat|nested] 4+ messages in thread
* Re: [ECOS] StrongARM SA1110
2001-03-13 10:26 ` Jonathan Larmour
@ 2001-03-13 10:38 ` Lewin A.R.W. Edwards
0 siblings, 0 replies; 4+ messages in thread
From: Lewin A.R.W. Edwards @ 2001-03-13 10:38 UTC (permalink / raw)
To: ecos-discuss
> > In general it seems Red Hat prefers little-endian.
>
>More specifically, most eval board vendors prefer little-endian. We can
>only follow them.
I'm not complaining, just summarizing what I had read in my perusal of the
list over the past few months.
>not to say they won't work). Do you have any specific problems to report?
No. I'm not using the SA1110 (though I might be in a couple of months time)
and I have no reason to run in big-endian mode. I believe that when I said
"it might not work because it isn't fully tested" I was in fact
paraphrasing a comment you made. I know it was a comment made quite
recently on this list by a Red Hat person.
=== Lewin A.R.W. Edwards (Embedded Engineer)
Work: http://www.digi-frame.com/
Personal: http://www.zws.com/ and http://www.larwe.com/
"Und setzet ihr nicht das Leben ein,
Nie wird euch das Leben gewonnen sein."
^ permalink raw reply [flat|nested] 4+ messages in thread
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2001-03-05 6:13 [ECOS] StrongARM SA1110 Warren Jasper
2001-03-05 6:22 ` Lewin A.R.W. Edwards
2001-03-13 10:26 ` Jonathan Larmour
2001-03-13 10:38 ` Lewin A.R.W. Edwards
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