Date: Wed, 24 Jan 2001 14:20:26 -0500 From: Dennis <dennis@etinc.com> To: David Rufino <daverufino@btinternet.com>, freebsd-hackers@FreeBSD.ORG Subject: Re: driver help Message-ID: <5.0.0.25.0.20010124141209.02782aa0@mail.etinc.com> In-Reply-To: <20010124153228.A5828@btinternet.com>
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At 10:32 AM 01/24/2001, David Rufino wrote: >* Mike Smith (msmith@freebsd.org) wrote: > > > I am currently trying to port the compatability layer of a linux > > > kernel driver to FreeBSD 4.x. The bit I'm stuck on at the moment > > > is, how do I map arbitrary physical address space to kernel virtual > > > address space (ala ioremap() in linux) ? Thanks. > > > > You don't. > > > > If this is a PCI device, it's all done for you when you call > > bus_alloc_resource. > >Ideally I would do this, except I'm porting a compatability layer for >a binary module, so I need a function which simply maps I/O space to >kernel virtual address space. Is it possible, if not desirable ? You can use vaddr_t pmap_mapdev(paddr,size) to map any physical memory address. Of course you never know when these "old friend" routines will disappear. Dennis To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-hackers" in the body of the message
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