On 09/10/2016 23:41, Rudolf Marek wrote: > Great, so there is a bug! Do you have some USB image I can try on more recent > AMD system (with Hudson chipset). Or we can try to report this to AMD, but I > have read somewhere that the new chipsets are done by Asmedia.
I did most of the testing using two small programs, one to examine the IO-APIC redirection table and the other to write its entries: https://people.freebsd.org/~avg/ioapic.c https://people.freebsd.org/~avg/ioapic_wr.c Another thing required is an interrupt that can be reliably triggered in a controllable fashion (like a mouse interrupt or a timer interrupt). In my case I used an interrupt from the watchdog timer. So, I would just directly re-program a pin corresponding to the interrupt and then trigger the interrupt and see what happens. An example: $ ioapic_wr 3 0xff00000000000300 -- Andriy Gapon -- coreboot mailing list: [email protected] https://www.coreboot.org/mailman/listinfo/coreboot
