[coreboot] MMIO UART driver on OS

[Marc Jones]

Hi Joe,

Have you tried making this change? Do you have any patches? Just currious,
but are you trying to set a debug port? I just started looking at the
microsoft dbg2 acpi field.

https://msdn.microsoft.com/en-us/library/windows/hardware/dn639131(v=vs.85).aspx

Marc

On Sun, Jul 31, 2016 at 2:19 PM Nico Huber <nico.h at gmx.de> wrote:

> Hi,
>
> On 31.07.2016 17:07, Zheng Bao wrote:
> > Hi, All,
> >
> > I want to add support MMIO UART support on OS.
> >
> > I checked the file pnp_uart.asl.
> >
> > For IO UART, a device with EisaId("PNP0501") is added into DSDT, the
> windows can detect the COM port in device manager.
> >
> > I am wondering if MMIO UART also have that convinient feature.
> in theory (I've just checked the code, never tried) the Linux driver
> supports MMIO UARTs too if you give it the same entry (PNP0501) with
> a memory resource instead of the io ports.
>
> Maybe this works in other OS' too?
>
> Nico
>
> >
> > Or I need to build a driver for each OS?
> >
> > Thanks.
> >
> >
> > Joe
>
>
> --
> coreboot mailing list: coreboot at coreboot.org
> https://www.coreboot.org/mailman/listinfo/coreboot
>
-- 
http://marcjonesconsulting.com
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://www.coreboot.org/pipermail/coreboot/attachments/20160803/0ad19883/attachment.html>