RE: mpparse.c APIC/ACPI support

-----Original Message-----
From: Grover, Andrew [mailto:andrew.grover-ral2JQCrhuEAvxtiuMwx3w@public.gmane.org] 

quoted

From: Cagle, John (ISS-Houston) [mailto:john.cagle-VXdhtT5mjnY@public.gmane.org]
I'm glad you got your system working with ACPI again.  Regarding
Windows, I've heard that it may|will remap just about 
everything to its
liking, so it doesn't surprise me that it's different.

I'm not an expert on APICs, but it seems that the
mp_config_acpi_legacy_irqs() routine shouldn't blindly set
IRQs 0..15 to
ISA conforming mode (edge triggered).  I know for a fact that many
systems will have PCI devices using/sharing these IRQs, which will
require the IRQ to be level-triggered.

In theory, ACPI comes through later and changes the irqs < 15 
with possible PCI devices by calling io_apic_set_pci_routing.

So *in theory* it should work ok. Obviously something is not right.

How does ACPI, when it comes through later, know which irq's < 15 are
for PCI devices?

Thanks,
John


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