ioremap of pci region on pSeries LPAR vs SMP
Paul Mackerras
paulus at samba.org
Mon Jan 10 20:10:59 EST 2005
Anil Kumar Prasad writes:
> On JS20, i get va in IO_REGION (0xE000....) while on
> p630 ioremap returns address in
> EEH_REGION(0xA000...). As soon as i try to dereference
> this returned va on p630, kernel crashes(dump is at
> the end of mail).
You shouldn't ever directly dereference the result of ioremap. You
have to use readb/readw/readl and writeb/writew/writel.
Paul.
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