On Thu, 29 Jul 1999, Christophe Kumsta wrote:
> But if I try to get the physical address with the virtual address with:
> physical_address = virt_to_phys(Virtual_buffer) ;
virt_to_phys is not expected to work like this on remapped addresses.
If you look as asm/io.h you will see it is really very simple macro:
#define __io_phys(x) ((unsigned long)(x) & ~PAGE_OFFSET)
/*
* Change virtual addresses to physical addresses and vv.
* These are pretty trivial
*/
extern inline unsigned long virt_to_phys(volatile void * address)
{
return __io_phys(address);
}
What you need is kvirt_to_phys function from kvmem.h from
http://crds.chemie.unibas.ch/PCI-MIO-E/mbuff-0.6pre4.tar.gz
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Tomek
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