Duane,

There were some updates to the OVMF ACPI based TimerLib back in September and 
October 2012 to address some hang conditions in SEC phase.

Are you using the latest qemu emulator and OVMF sources?  You might try 
verifying using the qemu monitor that the PMBA and PMREGMISC registers have 
been programmed and that the ACPI timer at I/O port address 0xB008 returns 
different values on each I/O read.

The default value for the ACPI Base Address for OVMF is 0xB000.  You can change 
PcdAcpiPmBaseAddress if you need a different I/O port base address for your 
version of qemu.

Mike

From: Duane Voth [mailto:[email protected]]
Sent: Thursday, April 04, 2013 2:52 PM
To: Laszlo Ersek
Cc: [email protected]
Subject: Re: [edk2] OVMF networking revisited

Thanks!


So it appears that my OVMF boot in qemu is hanging in a loop that includes 
InternalAcpiDelay().  Is there a way to build OVMF that changes the way ACPI 
timers are handled?

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