Messages in this thread |  | | Date | Wed, 08 Nov 2000 17:53:11 -0500 | From | Jeff Garzik <> | Subject | Re: accessing on-card ram/rom |
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"MEHTA,HIREN (A-SanJose,ex1)" wrote: > I have a PCI card which has on-card ram/rom which gets mapped > into pci address space and there is a separate base register > for this memory. Now the question is : can I access this on-card > memory by converting the pci base address into the virtual address > using bus_to_virt and adding the required offset ? Or do I need > to use ioremap function to map the physical address space starting > from the pci base address into the kernel virtual address space ? > Or is there any other interface to access the on-card memory ? > Is it that bus_to_virt can be used only for the normal RAM ?
Use ioremap.
For more details, read linux/Documentation/IO-mapping.txt.
Jeff
-- Jeff Garzik | "When I do this, my computer freezes." Building 1024 | -user MandrakeSoft | "Don't do that." | -level 1 - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org Please read the FAQ at http://www.tux.org/lkml/
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