[Ilugc] doubts in kernel porting & device drivers
- From: cyborg4k@xxxxxxxxx (Shakthi Kannan)
- Date: Tue Jan 18 13:06:57 2005
Hi,
--- Madhukar mythri <madhukar_linux@xxxxxxxxxxx>
wrote:
So i have a I/O-card which supports both(as
per
/proc/pci)...
which has I/O-address "C000".... for this I/O
when
i do ioremap()..
How? Show some snipped code.
it is failing"could not remap"...
why i could not understand??
Show me some error messages.
i had tested by "ioflags & IORESOURCE_IO"..it IO
region only...
but, it could not do ioremap()...
Does it compile?
here i got one doubt:
for ioremap() we have to pass physical address
as
first parameter....is IO-mapped address("C000") is
physical address????
The address you see in /proc/pci is physical address.
The address returned from ioremap is virtual address.
Regards,
K Shakthi
=====
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K Shakthi
Specsoft (Hexaware Technologies), ASIC Design Center
http://www.geocities.com/shakthimaan
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