Feature #9664
closedFeature #10028: loader: implement framebuffer console
Feature #8918: loader.efi: add vesa edid support
loader: need UEFI32 support
100%
Description
Some hardware (like intel atom based) have UEFI32 firmware but can start 64-bit kernel, would like to be able to boot from such systems.
For code base it means we need to provide multiboot2 trampoline for 32-bit code, which is not that hard; we still only load the 64-bit kernels. The interesting part is later on, when we are implementing access to EFI Runtime Services from kernel - then we need to switch to 32-bit mode and back. EFI System table accesses are also to be done using native (32-bit) pointers.
As a visible change, we will build following binaries:
The current /boot/boot1.efi
will be replaced by two new files:
/boot/bootia32.efi
/boot/bootx64.efi
The current /boot/loader.efi
will also be replaced, by:
/boot/loader32.efi
/boot/loader64.efi
For users of the current boot1.efi
, this change is a flag day because we have no automated ESP update and boot code in ESP will need to be updated manually.