Hi, During my investigations i found this Geode GX2 hardware bug discription, could that have anything to do with my problems?
Thanks,Nils.
AMD Geode™ GX Processors Silicon Revision 2.1 Specification Update:
1.15 Limit fault during exception in SMM with unreal code segment
Description: When an exception or other interseg- ment change of flow (COF) occurs inside an SMI handler and the target offset is higher than the SMI handler's code segment (CS) limit, a spurious general protection fault for a segment limit violation may occur. The CS limit, normally FFFFh in real mode, can be set to a smaller value inside SMM with RSM or with an MSR write. When fetching the first instruction of an exception handler, or the target of a far jump, the CPU mistakenly uses that shortened CS limit instead of the implicit limit of FFFFh that would normally apply to a real mode code segment. This leads to an erroneous general protection excep- tion. Implications: Exceptions may generate a limit fault when a COF occurs while in SMM. Resolution: Leave the SMM's code segment limit at FFFFh, or put any SMM exception handlers and intersegment COF targets lower in their segment, at offsets that are less than the SMM CS limit.