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Questions tagged [efi]

Extensible Firmware Interface is a specification that defines a software interface between an operating system and platform firmware

30 questions
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Where can I find out input command from EFI Shell?

does anyone know where can I find out 'input' command in EFI shell? And i tried two version of efi shell, one is v2.0 and another is v2.31, but these verion, I still find any of input command. So, I don't know how to get input command from efi…
Tody Kwok
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Is it possible to use EFI to create fully cross-platform disk driver?

I need to create a driver, which will behave similar to software RAID. E.g. driver will need to communicate to multiple physical disks (or maybe even network resources), and shall look like a disk to the OS. So two main questions are: 1) Are EFI…
LOST
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Writing Windows 7 UEFI entry to NVRAM

I am currently working on a script to image multiple lab machines I am in charge of with Windows 7, unfortunately they are UEFI Dell machines which work in a silly way. On the machine I created the image with in the Dell setup utility there was a…
rolands
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Detect BIOS from WinPE: Legacy or UEFI, using vbs // Outputting results from a .exe to .txt

Here is my scenario: I have a server with 2 possible configurations: 2-TB HDD which require no special treatment or 3-TB HDD that require a UEFI BIOS and a GPT partition to boot the OS. I am trying to create a single installation USB key that is…
ToastMan
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UEFI LoadImage from Memory

I am looking at using Bootservices function LoadImage to load a UEFI application image from memory. Function parameters are: typedef EFI_STATUS LoadImage ( IN BOOLEAN BootPolicy, IN EFI_HANDLE ParentImageHandle, IN EFI_DEVICE_PATH_PROTOCOL…
Without Me It Just Aweso
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UEFI - ImageLoad doesn't work - error = Not Found

I'm trying to load MyHelloWorld application from another application. But get error not found from the ImageLoad function, although path is OK. MyHelloWorld.efi is at "fsnt0:>project1>MyHelloWorld.efi". What am I missing that it doesn't find the…
GalDude33
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how to detect ECC error in memroy testing under UEFI shell

I wrote a EFI binary file to test physical DIMMs under UEFI shell, the process is quite simple - first write a test pattern in to a physical address, then read it out and compare with the original pattern. However, the DIMMs might encounter…
Kun
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How to remove Ubuntu entries from UEFI

I 've got an issue with my UEFI boot values. In the past I installed Ubuntu 14.10 LTS as a dual-boot system. It was working ok, until I decited to remove it. I deleted the Ubuntu partitions and merged them with my Windows partition. Everything is…
geortzan1
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How to static link EDK II library into application in Visual Studio 2008 tool chain

I have EDK II application and library in package and it works fine when I compile it with library source codes. Now I want to remove the library source codes and link that library with application through .lib file. I remove library source codes…
Dilshan Jayakody
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Is there any way of emulating an I/O device in UEFI?

Is there any way of emulating an I/O device (eg. super IO controller) in an UEFI runtime driver running behind the OS?
mateass
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Error 9090: Xen 4.2 with Centos 6.6 but Ubuntu/Xen works fine on same hardware

Using DVD1 from the current Centos 6.6 x86_64 installation, I can install Centos 6.6 minimal to install successfully on a Intel NUC computer with 20GB Flash and 4 GB RAM. The kernel is 2.6.32-504.el6.x86_64. Xen4CentOS will not boot, but loading…
apollon
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Access SATA drive via AHCI directly in efi shell?

If we want to access(read/write) SATA drive via AHCI in EFI shell, is there any read/write interface used for this purpose ? That is, does EFI shell application need to implement the AHCI spec to access drive ? (build command, issue command and…
liaoo
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allocate memory whose physical address >4GB in efi application?

I am wondering if it is possible to allocate the memory buffer whose "physical address" is beyond 4GB in efi application ? Ex. There is 6GB DRAM installed on PC and efi application allocates 4KB buffer and its physical memory address is…
liaoo
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Does current EFI BIOS natively support AHCI?

I have one question about the AHCI support in current EFI BIOS... Before when we plug external storage card(Ex. PCie-SATA) and attach the SATA drive, BIOS always invokes the Option ROM on that card to do some initializations and provide UI to config…
liaoo
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How to make a debian live usb efi?

I'm struggling to create a Debian 7 netinstall live usb key which can boot with efi. I can't find documentation or tutorials about this manipulation.
Juskie
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