Hi,
I am trying to port gnumach to HP T620 which is an AMD FAM16h board
running my port of coreboot.
With --disable-apic --enable-cpus=1 the board boots to a shell (but NIC
locks up).
Under GNU/Linux, using command line options "noapic nolapic", the same
thing happens and the NIC locks up even with vendor bios.
I believe there may be a wiring problem with the interrupt lines using
PIC interrupts on this board, and the board may be only wired up for
APIC usage.
Therefore, I want to make gnumach work with APIC interrupt routing on
this board.
I have run into some problems when running with
--enable-apic --enable-cpus=2
1) The MADT table checksum is non-zero but still valid.
2) gnumach runs into a kernel page fault when attempting to validate the
checksum:
/* Check the checksum of the APIC */
apic_checksum = acpi_checksum(apic, apic->header.length);
/* NOT REACHED */
3) The board uses RSDPv2 not RSDPv1 table pointer, which is currently
unsupported by gnumach.
I think if we fix these issues, the board will boot and NIC might even
work as it is a 10ec:8168 realtek and supported by netdde.
Damien
