* [ECOS] Mapping hardware registers to virtual address in RedBoot
@ 2005-09-16 6:44 Benny Chen
2005-09-16 9:27 ` Andrew Lunn
0 siblings, 1 reply; 2+ messages in thread
From: Benny Chen @ 2005-09-16 6:44 UTC (permalink / raw)
To: ecos-discuss
Hi there,
Can anyone tell me where can I get information on how to map hardware
registers to virtual address in RedBoot so that I can access the
registers using utilities like 'dump', 'mcopy'..etc.
I had a look at the hal_platform_setup.h file, this code is written in
assembler, which is not very helpful for me. I am using the cirrus
edb9301 development board.
Hope someone can help.
Cheers,
Benny Chen
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^ permalink raw reply [flat|nested] 2+ messages in thread
* Re: [ECOS] Mapping hardware registers to virtual address in RedBoot
2005-09-16 6:44 [ECOS] Mapping hardware registers to virtual address in RedBoot Benny Chen
@ 2005-09-16 9:27 ` Andrew Lunn
0 siblings, 0 replies; 2+ messages in thread
From: Andrew Lunn @ 2005-09-16 9:27 UTC (permalink / raw)
To: Benny Chen; +Cc: ecos-discuss
On Fri, Sep 16, 2005 at 09:31:07AM +1000, Benny Chen wrote:
> Hi there,
> Can anyone tell me where can I get information on how to map hardware
> registers to virtual address in RedBoot so that I can access the
> registers using utilities like 'dump', 'mcopy'..etc.
>
> I had a look at the hal_platform_setup.h file, this code is written in
> assembler, which is not very helpful for me. I am using the cirrus
> edb9301 development board.
eCos uses a 1:1 mapping between physical and virtual addresses. So
just try accessing the memory and see what happens. If they are part
of the "normal" set of registers it should just work. If they are
special regisetes outside of the normal range you might need to extent
the MMU setup to allow you access.
Andrew
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Before posting, please read the FAQ: http://ecos.sourceware.org/fom/ecos
and search the list archive: http://ecos.sourceware.org/ml/ecos-discuss
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2005-09-16 6:44 [ECOS] Mapping hardware registers to virtual address in RedBoot Benny Chen
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