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Message-ID: <3A09D957.4BC6F0@mandrakesoft.com>
Date: Wed, 08 Nov 2000 17:53:11 -0500
From: Jeff Garzik <jgarzik@mandrakesoft.com>
Organization: MandrakeSoft
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To: "MEHTA,HIREN (A-SanJose,ex1)" <hiren_mehta@agilent.com>
CC: "'linux-kernel@vger.kernel.org'" <linux-kernel@vger.kernel.org>
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
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