Re: [EDK DEV] Launching Linux from an image in USB

Subject: Re: [EDK DEV] Launching Linux from an image in USB

From: Xiaochen Xin <xcxin@byosoft.com.cn>

To: dev@edk.tianocore.org

Date: 2009-10-06 17:55:58

Hi Aru

I think this method won't work. EFI RAMDISK is an EFI boot time driver, which needs EFI environment to support its function. But when you using CSM to boot OS you have already switch to real mode and all EFI boot time driver are removed from memory. So you lost the ram disk support, in another words, CSM cannot read anything from your ram disk now.
 

On Tue, Oct 6, 2009 at 12:55 AM, Arumugam Sivasubramanian <arumugam1175@yahoo.com> wrote:
Thanks, Brian, Xiaochen.

The firmware includes the CSM module. The OS that i am trying to boot is Redhat 5.3 (Legacy OS).

I downloaded the source of EFI RAMDISK driver, I can create a EFI RAMDISK and then fix CSM module to boot a legacy OS from this RAMDISK.

Is this possible? Can I boot legacy OS from EFI RAMDISK? Are there any restrictions that i should be aware of?

Thanks,
Aru

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