placing of ioremap ?

placing of ioremap ?

[ashish anand]

I have one question regarding the placing of ioremap call
suppose i have done ioremap call inside the mm/init.c
for pci i/o or memory space ..and if this space is above
the ioremap_base i would be having the virtual address
equal to physical address

now i don't need to call ioremap inside the driver code
since the resources (either pci i/o or memory or both) that
i am supposed to give a particular card has already been
ioremapped by now
in case my bios has not done the resource allocation
i have to just write the proper values in PCI_BASE_ADDRESS
registers of that pci card. Am I Correct?

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Re: placing of ioremap ?

[Dan Malek]

ashish anand wrote:
>
> I have one question regarding the placing of ioremap call
> suppose i have done ioremap call inside the mm/init.c
> for pci i/o or memory space

Well, you really shouldn't.......The PCI I/O space could be
done there so the usual inb/outb and friends work.  PCI memory
space should not be mapped there, it is done by the driver.

> in case my bios has not done the resource allocation
> i have to just write the proper values in PCI_BASE_ADDRESS
> registers of that pci card. Am I Correct?

You should include the Linux PCI auto config function.  It will
do this plus properly assign the interrupts.


	-- Dan

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