So remember El Torito != ISO-9660, so the image will look different in the OS
vs. the EFI. The file system that EFI sees will show up as a file in the OS,
and EFI will not see all the ISO-9660 files you can see in the OS.
Also remember that the OS Installer is going to call ExitBootServices() at some
point, and after that it needs a native Windows driver for the RAM disk, as all
the EFI device driver stuff goes away.
Thanks,
Andrew Fish
On Apr 4, 2013, at 2:08 PM, Thomas Rognon <tcrog...@gmail.com> wrote:
> Oh ok, that's good news regarding El Torito. I'll start wrapping my head
> around the code you mentioned. The ISOs I will be booting are OS installers.
> Specifically, I'm trying to boot a legit Windows 7 installer from memory
> right now.
>
>
> On Thu, Apr 4, 2013 at 3:41 PM, Tim Lewis <tim.le...@insyde.com> wrote:
> The partition driver already exists (see
> MdeModulePkg/Universal/Disk/PartitionDxe). This already recognizes El Torito
> format, so, as long as the partition you boot from is FAT32 you should have
> no trouble (see the FatBinPkg).
>
>
>
> If you are trying to boot an OS, then you have to figure out how to convince
> how to convince that OS to continue to use that driver once it reaches the
> hand-off point in boot, because it then requires a native OS driver to
> continue to access your ISO.
>
>
>
> Tim
>
>
>
> From: Thomas Rognon [mailto:tcrog...@gmail.com]
> Sent: Thursday, April 04, 2013 1:31 PM
> To: edk2-devel@lists.sourceforge.net
> Subject: Re: [edk2] Boot to ISO image in volatile memory
>
>
>
> Thanks! That gives me a great start. I'm new to a lot of this stuff,
> though, so the steps you outlined will be tough for me without guidance. Is
> there any UEFI optical drive code floating around the internet somewhere? I
> looked but couldn't find any. I'm essential doing the same thing as booting
> to a CD/DVD, except its all in memory.
>
>
>
> Thomas Rognon
>
>
>
> On Thu, Apr 4, 2013 at 2:27 PM, Tim Lewis <tim.le...@insyde.com> wrote:
>
> Produce an instance of BLOCK_IO protocol which returns pieces of the
> in-memory image. Then perform a ConnectController() on that handle, which
> should cause a DISK_IO and SIMPLE_FILE_SYSTEM to be mounted automatically.
>
>
>
> Then, you use the file system to load the boot loader (LoadImage()), signal
> the ready-to-boot event, set up the UEFI watchdog timer, and then start the
> boot loader (StartImage()). There may be a few more standard boot items I may
> be forgetting, but that’s about it.
>
>
>
> Tim
>
>
>
> From: Thomas Rognon [mailto:tcrog...@gmail.com]
> Sent: Thursday, April 04, 2013 12:21 PM
> To: edk2-devel@lists.sourceforge.net
> Subject: [edk2] Boot to ISO image in volatile memory
>
>
>
> Let's say I'm running a UEFI_APPLICATION called IsoBootTest.efi and I have an
> ISO image in volatile memory and I have the start address and size of the ISO
> image. Can I boot the ISO image? If so, can someone give me a hint on how I
> would do it? (If it makes any difference, I'm using UDK2010.)
>
>
>
> Thomas Rognon
>
>
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