On Aug 8, 2014, at 6:41 AM, Paolo Bonzini <[email protected]> wrote:

> Il 08/08/2014 00:49, Laszlo Ersek ha scritto:
>> - Will this redirection break the terminal driver, for example? OVMF
>> does make use of the serial port even when DEBUG() goes to the QEMU
>> debug port. For example, thanks to ConSplitterDxe, the setup screens
>> (Boot manager, Boot maintenance manager etc) are fully usable on the
>> virtual serial port. I don't immediately see how that stack is built,
>> but it should not be disturbed. (I don't know if this patch disturbs it,
>> I'm asking.)
>> 
>> ... TerminalDxe seems to consume gEfiSerialIoProtocolGuid, which seems
>> to be provided by IntelFrameworkModulePkg/Bus/Isa/IsaSerialDxe. Hmm... I
>> think that one doesn't depend on SerialPortLib. Good.
> 
> Does that mean we lack an equivalent of IsaSerialDxe for ARM?  There's
> nothing in ArmPlatformPkg that produces gEfiSerialIoProtocolGuid.
> 

ISA is the PC/AT ISA bus from 1981, so I would not expect to see that on a ARM 
system... 

I’m guessing it is a combination of these modules...
https://svn.code.sf.net/p/edk2/code/trunk/edk2/ArmPlatformPkg/Library/PL011SerialPortLib/
https://svn.code.sf.net/p/edk2/code/trunk/edk2/EmbeddedPkg/SerialDxe/

Thanks,

Andrew Fish

> Paolo
> 
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