Messages in this thread |  | | Date | Thu, 27 Sep 2001 10:03:26 +0200 (MEST) | From | Armin Schindler <> | Subject | Re: Question about ioremap and io_remap_page_range |
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On Thu, 27 Sep 2001, Ingo Molnar wrote:
> > On Thu, 27 Sep 2001, [GB2312] Êæ¹úÇ¿ wrote: > > > Here is some rather basic questions I want ask ,any reply or comment > > please CC to my emailbox,thank you very much. > > > > When I work with kernel 2.4.2 in Intel X86 , I use > > > > VIRT_ADDR = ioremap(BUS_ADDR); to map a section of PCI memory, and > > X_ADDR = virt_to_phys(VIRT_ADDR); > > i'd suggest to read Documentation/DMA-mapping.txt in any recent kernel > source, the bus_to_virt()/virt_to_phys() interface is obsolete and has > been replaced by the pci_alloc_*/pci_map_*/pci_free_*() dynamic > DMA-mapping API. You can find some nice examples of usage in > drivers/net/*.c. > > Ingo
virt_to_phys() is obsolete ? What should be used if I need the phys address of a memory page ? (e.g. for mmap() remapping)
Armin
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