[coreboot] how to route IRQ4 (COM1) on LPC bus for bayleybay_fsp
benoit.sansoni at gmail.com
Fri Jan 15 20:42:06 CET 2016
I mean by not available : not working under my real time OS that I load
through a grub2 paylaod.
You are right.
I replace the IRQ 4 by an other one that it is not used in my system as
#define PIRQ_PIC_ROUTES \
PIRQ_PIC(A, 5), \
PIRQ_PIC(B, 6), \
PIRQ_PIC(C, 7), \
PIRQ_PIC(D, 10), \
PIRQ_PIC(E, 11), \
PIRQ_PIC(F, 12), \
PIRQ_PIC(G, 14), \
And it works. Perfectly.
I have my serial console on COM1 under the OS.
I did not chose IRQ 3 because I am using also the COM2.
On 14/01/2016 23:02, Rudolf Marek wrote:
> What does it mean not available? Maybe you can check if you programmed ELCR
> register to edge for IRQ4.
> You can't share the IRQ4 with PCI IRQ I think thats why it does not work.
> You need to route the the PIRQA to something else, like IRQ3.
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