On Aug 21, 2014, at 8:13 PM, Chris Cuthbert <nd6...@hotmail.com> wrote:
> Hi Siyuan,
>
> I can get to Grub prompt but I don't see it trying to load any more files,
> like the boot menu. Does GRUB V2.02 support PXE boot by default or does it
> need some configuration option ?
> How does Grub know that it is in network boot mode and not booting from some
> disk ?
> How does it know the IP address of TFTP server ?
The EFI Application (OS loader) can check the Loaded Image protocol, on the
ImageHandle, to figure out where it was loaded from.
Thanks,
Andrew Fish
> Thanx,
> Narinder Dhillon
>
>
> From: siyuan...@intel.com
> To: edk2-devel@lists.sourceforge.net; nd6...@hotmail.com
> Subject: RE: [edk2] UEFI PXE Boot Question
> Date: Fri, 22 Aug 2014 02:54:03 +0000
>
> Hi, Chris
>
> The UEFI network driver doesn’t need to be a runtime driver. The typical PXE
> boot process is as below: first, GRUB will use UEFI stack to download the
> required files to boot at least a minimum OS kernel, then load it. The OS
> kernel continues to use UEFI stack to download until it get all the files to
> start a network stack. After that, OS will call ExitBootServices() service to
> terminate the UEFI stack, then start its own network.
>
> Best Regards,
> Siyuan
>
> From: Chris Cuthbert [mailto:nd6...@hotmail.com]
> Sent: Friday, August 22, 2014 9:20 AM
> To: Edk2 Devel
> Subject: [edk2] UEFI PXE Boot Question
>
> Hi All,
>
> I am trying to PXE boot Linux kernel and I can get GRUB to load and run and
> get to grub prompt. How is GRUB supposed to get the boot menu from the tftp
> server ?
> If it is using UEFI network driver to talk to tftp server, does that mean the
> UEFI network driver needs to be a UEFI runtime driver ?
>
> Thanx,
>
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