Am 10.11.2010 18:30, schrieb fengwei zhang: > Suppose I just want to put RSM instruction in the smmhandler, can I just > write instruction "0f aa"(bianry code of RSM) to location 0xa0000 and > 0xa0001. I tried this, but my machine went freeze after I invoke SMI. I think the SMI entry point is usually 0x8000 into the SMM segment, so you'd need to put rsm at 0xa8000, not at 0xa0000.
> I am thinking I may need to more instructons, because the SMM start with > 16 bits real mode, it may not recongnize the instruction, right? That could be accomodated by ".code16" in the assembly code. We have some semi-generic SMI handler, originally built to support i945/ICH7. Not sure how much more generic it can be, Stefan might be able to answer that. Patrick -- coreboot mailing list: [email protected] http://www.coreboot.org/mailman/listinfo/coreboot
