On Friday 19 January 2007 11:37, Bruno Ducrot wrote: > On Fri, Jan 19, 2007 at 03:26:26PM +0530, Mohan Kumar Jami wrote: > > Hi, > > > > I have couple of questions related to _SUN object. > > > > 1) Is _SUN object be present DSDT tables? > > They are defined under DSDT or RSDT tables as any other ACPI objects > populating the ACPI namespace. The DSDT and all the SSDT's listed in the RSDT are all loaded at boot-time. However, the BIOS AML can also explicitly Load additional "dynamic" SSDTs at run-time -- and can also Unload an SSDT. In this way, objects in the name space can appear and go away at run-time. _SUN, Slot User Number, is an (optional) property of an object. So for it to change at run-time, the object that contains it would have to go away and then come back. cheers, -Len > > 2) How this DSDT table get updated? > > They can't be updated. > > > 3) Is DSDT table is static binary file or it can be dynamically updated? > > A DSDT table is not a static binary file. On most i386 or amd64 > architectures, DSDT and SSDT are part of the BIOS. > The BIOS uncompressed and copyied them into main memory at the > POST stage since the ROM is too limited in size. > > > 4) Who will update the DSDT tables? > > By the customer via BIOS updates obtained from the vendor. > > Cheers, > - To unsubscribe from this list: send the line "unsubscribe linux-acpi" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
