[SeaBIOS] seabios: acpi: add _RMV control method for PCI devices
Gleb Natapov
gleb at redhat.com
Wed Dec 8 20:58:35 CET 2010
On Wed, Dec 08, 2010 at 04:01:18PM -0200, Marcelo Tosatti wrote:
> On Wed, Dec 08, 2010 at 07:34:42PM +0200, Gleb Natapov wrote:
> > On Wed, Dec 08, 2010 at 03:08:59PM -0200, Marcelo Tosatti wrote:
> > > Use _RMV method to indicate whether device can be removed.
> > >
> > But Windows still shows device as removable in the gui and allows to
> > remove it, correct?
>
> No. From "Designing Hardware for Surprise Removal under Windows XP"
> document:
>
> "An ACPI BIOS can override the Removable capability by using the _RMV
> method ..."
>
Cool. I wonder how it co-exists with _EJ0 method for the same device.
> > > +#define gen_pci_device(name, nr) \
> > > + Device(SL##name) { \
> > > + Name (_ADR, nr##0000) \
> > > + Method (_RMV) { \
> > > + If (And(\_SB.PCI0.PCRM, ShiftLeft(1, nr))) { \
> > > + Return (0x1) \
> > > + } \
> > > + Return (0x0) \
> > > + } \
> > > + Name (_SUN, name) \
> > > + }
> > Why not add this to hotplug_slot() macro?
>
> Because its ignored if declared in the device object thats a child
> of SB.PCI0 (hotplug_slot).
Any idea why?
--
Gleb.
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