Hello,
Short information on what I want to do:
During UEFI boot Im downloading a small complete partition image (including
a MBR and a bootmanager) and place that image in allocated runtime space.
After that I want to start the bootmanger inside of that image.
What Im doing so far:
// Here we are in the middle of a UEFI boot during DXE phase and way before
runtime just after all necessary network protocols were installed.
// We have sucessfully downloaded a small HDD parition Image (including a
MBR and a boot loader)
// That images resides in runtime memory I have a pointer to and I know the
size of the image.
// Now we're doing the following steps:
Status = pBS->InstallMultipleProtocolInterfaces(
&gImageHandle,
&EfiComponentNameProtocolGuid,
&RomDiskComponentName, //Initialize driver NAME protocol
NULL
);
// Setting up all variables for a Memory Map device path structure as
mentioned in UEFI spec here.
Status = pBS->InstallMultipleProtocolInterfaces(
&gImageHandle,
&RomDiskDevicePathGuid,
pRomDiskDevicePathProtocol, //Initialize device PATH protocol
NULL
);
// And as a last step we're setting up the EFI_BLOCK_IO_MEDIA structure and
do:
Status = pBS->InstallMultipleProtocolInterfaces(
&gImageHandle,
&RomDiskBlockIoProtocolGuid,
&RomDiskBlockIoProtocol, //Initialize BLOCKIO protocol
NULL
);
That is working fine so far. After the DXE phase I can find the BlockIO
protocol as blk0 in my UEFI Shell. If I do
Ø dblk blk0
I can see the correct content of my partition image.
But what Im missing now is that there is no Disk I/O protocol installed up
on my Block I/O protocol.
Regarding UEFI specification 12.7 I thought that the EFI_DISK_IO_PROTOCOL is
automatically installed on all available Block I/O protocols.
Any clue why that is not done in that case? And what I can do about it?
Thanks & Regards,
Michael
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