Hi,
Check the APIC bypass de assert message bit. 0x5b bit3 I think you need to put there 0.
There are some registers from 0x70 - 0x7f documented in the Programming guide only. 0x7c bit 3 is hypetrtransport mode for APIC put 0 there.
And 0x77 bit 5 I dont understand what exactly it is. Try flipping it too.
Rudolf
OK. Problem found.
The IOAPIC IRQ0 setup was being zapped by some stuff I was trying to debug with!
Timer now initialises OK, which makes me think that IRQs are now coming through OK.
USB is now crapping out. I'll investigate further.
-----Original Message----- From: Rudolf Marek [mailto:r.marek@assembler.cz] Sent: 27 July 2009 13:07 To: Harrison, Jon (SELEX GALILEO, UK) Cc: coreboot@coreboot.org Subject: Re: [coreboot] IOAPIC Initialisation - How much do you have to do ??
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Hi,
Check the APIC bypass de assert message bit. 0x5b bit3 I think you need to put there 0.
There are some registers from 0x70 - 0x7f documented in the Programming guide only. 0x7c bit 3 is hypetrtransport mode for APIC put 0 there.
And 0x77 bit 5 I dont understand what exactly it is. Try flipping it too.
Rudolf
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Harrison, Jon (SELEX GALILEO, UK) -
Rudolf Marek