On 01/05/2016 05:23 PM, Stephen Polkowski wrote: > Hi all, > > I've noticed recently that Windows 10 has an method that allows the > user to reboot directly to the UEFI bios settings without having holding > the "DEL" key at power up. This is a useful feature for tablets, etc. > Here is an article that describes the steps: > > http://www.tenforums.com/tutorials/5831-uefi-firmware-settings-boot-inside-windows-10-a.html > > > How is this achieved from a edk2 programmer's point of view. Does > the Windows OS return EFI_SUCCESS to the boot manager? Or, perhaps the > OS changes the BootNext variable to something and then reboots? > > How does this process work? I want to write an edk2 shell > application that does the same thing.
For a working code sample in an EFI application, check the RebootIntoFirmware() function in rEFInd's refind/main.c file: https://sourceforge.net/p/refind/code/ci/master/tree/refind/main.c This function is borrowed from gummiboot (now systemd-boot), but I don't have an exact URL handy for the latter. I'm pretty sure that GRUB 2 has this functionality, too, but I've not checked to see how it implements the feature. -- Rod Smith rodsm...@rodsbooks.com http://www.rodsbooks.com _______________________________________________ edk2-devel mailing list edk2-devel@lists.01.org https://lists.01.org/mailman/listinfo/edk2-devel
