> > 1. Should pci_resource_start be returning the PCI memory space address or
> > a physical memory space address?
>
> I believe that pci_resource_start() should return physical address, not
> bus one. It already happens on PReP.
It returns a cookie for use with ioremap. Who says that a given device has
a constant bus or physical mapping that is unique ?
> > 4. What does this mean for ioremap? (currently, on ARM, ioremap takes
> > PCI memory space addresses, not a physical memory address, which makes
> > the physmap MTD driver technically broken).
>
> And ioremap() should take physical address, returning virtual one.
No. Ioremap takes a cookie and returns a different cookie suitable for using
with readb/writeb/memcpy_fromio and friends.
Eg on Sparc64 its a physical address and readb uses TLB bypass
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