[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index] RE: [Xen-devel] EPS Signature
I get following Error.. 496: error: `isa_virt_to_bus_is_UNSUPPORTED' undeclared (first use in this function) Is it truely unsupported or I am missing proper includes.. I suspect later but "UNSUPPORTED" makes me uncomfortable. Please advise. -Kaushik -----Original Message----- From: xen-devel-bounces@xxxxxxxxxxxxxxxxxxx on behalf of Ian Pratt Sent: Sun 2/4/2007 6:52 PM To: Kaushik Barde; Xen devel list Subject: RE: [Xen-devel] EPS Signature > We want to access the EBDA Entry Point Signature at 40:0E for our DOM-0 > through a driver, > We noticed that driver is trying to read from a pseudo physical location > and not the physical machine RAM location. Hence it's not getting the > proper value. But if we have to read from the machine RAM location we can > use ( virt_to_bus or bus_to_virt) per dev_list comments. > > But this area is under the control of hypervisor. I do not know if we can > ioremap these pages ( those which belong to hypervisor). > > I am trying to see if we can be able to get to the 40:0E address. And get > the correct EPS signature Dom0 already has the bottom 1MB of physical ram mapped. You can use the poorly named isa_bus_to_virt() Ian _______________________________________________ Xen-devel mailing list Xen-devel@xxxxxxxxxxxxxxxxxxx http://lists.xensource.com/xen-devel _______________________________________________ Xen-devel mailing list Xen-devel@xxxxxxxxxxxxxxxxxxx http://lists.xensource.com/xen-devel
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