On Fri, Jan 12, 2007 at 11:22:58AM +0530, dhanya wrote: > -----Original Message----- > From: Greg KH [mailto:greg@xxxxxxxxx] > Sent: Friday, January 12, 2007 12:48 AM > To: dhanya > Cc: 'kernelnewbies' > Subject: Re: How to get PCI slot information from ACPI > > > >Try reading the ACPI spec about this :) > > >And again, why do you need these objects? What use can userspace have > >for them? What are you trying to accomplish here? > > >If you are only looking for these objects to detect if you have a pci > >hotplugable machine, that is incorrect and you should be asking the > >kernel for something else... > > I need to retrieve the PCI slot information from ACPI tables using _SUN > object. That is why I want access the ACPI tables. What do you want to _do_ with that slot information? And what if the machine does not use ACPI tables to control PCI slots (which is quite a large majority of PCI hotplug systems out there today)? > After going through the ACPI specs what I found is, this _SUN object will be > present in DSDT tables for each device. > > But when I went and see the ACPI tables in /proc/acpi/dsdt I haven't find > any _SUN present in that. > So I want what is that mean if _SUN entry is not present in it? > When this _SUN object will be present in DSDT? > Or > Is there any thing wrong in my Assumption that _SUN will be present in DSDT? > Or > Is my ACPI BIOS don't have _SUN method implemented, that's why it is not > displaying in DSDT tables? Try asking these ACPI specific type questions on a ACPI mailing list, they will be able to help you out better. Also, why do you think that your machine will really have those entries? Does it support PCI Hotplug? If not, I really doubt that they will be present at all. thanks, greg k-h -- Kernelnewbies: Help each other learn about the Linux kernel. Archive: http://mail.nl.linux.org/kernelnewbies/ FAQ: http://kernelnewbies.org/faq/
