[Ilugc] doubts in kernel porting & device drivers
- From: cyborg4k@xxxxxxxxx (Shakthi Kannan)
- Date: Wed Jan 19 23:22:40 2005
Hi,
--- Madhukar mythri <madhukar_linux@xxxxxxxxxxx>
wrote:
(in O.S books i had studied like, physical address
mean RAM address)
Not necessarily. It depends on the architecture.
Having 32 address lines gives the ability to address a
4G address space. Where it is mapped to depends on the
hardware.
ioaddr = ioremap(physical_addr, Len);
ioaddr should be of type - unsigned long.
oky...but, ioremap() returns type "void *" know...
So, should we type cast ...
void * is a generic type. It cannot be used directly.
It is useful to pass addresses (that can represent
anything). You will need to typecast it to use it.
"Suriya Narayanan M S" <mssnlayam@xxxxxxxx> wrote:
PS: Not to offend you, but this attitude is really
irritating. ILUGC is
not a technical support center.
No offence, but, if you do not wish to reply, please
ignore the e-mail. But, don't discourage a person from
asking questions. I don't see why ILUGC cannot be a
technical support center. It is a great place to learn
and provide technical help :)
Regards,
K Shakthi
=====
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K Shakthi
Specsoft (Hexaware Technologies), ASIC Design Center
http://www.geocities.com/shakthimaan
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