GitHub-Mirror/u-boot
2
0
Fork 0
mirror of https://github.com/Fishwaldo/u-boot.git synced 2025-03-18 13:11:31 +00:00
Code Issues Projects Releases Packages Wiki Activity Actions

x86: doc: Remove stale sections of 64-bit support

Browse source 
There are some sections in current doc saying 64-bit is unsupported.
This apparently is out of date. Remove it.

Signed-off-by: Bin Meng <bmeng.cn@gmail.com>
Reviewed-by: Heinrich Schuchardt <xypron.glpk@gmx.de>
This commit is contained in:
Bin Meng 2018-10-13 20:52:04 -07:00
parent 6feb2ff502
commit 0e028bf970
1 changed files with 0 additions and 17 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

17
doc/README.x86
View file

@ -1160,27 +1160,10 @@ to load a 'u-boot-payload.efi', see below test logs on QEMU.
See README.u-boot_on_efi and README.uefi for details of EFI support in U-Boot.
64-bit Support
--------------
U-Boot supports booting a 64-bit kernel directly and is able to change to
64-bit mode to do so. However, U-Boot itself is currently always built
in 32-bit mode. Some access to the full memory range is provided with
arch_phys_memset().
The development work to make U-Boot itself run in 64-bit mode has not yet
been attempted. The best approach would likely be to build a 32-bit SPL
image for U-Boot, with CONFIG_SPL_BUILD. This could then handle the early CPU
init in 16-bit and 32-bit mode, running the FSP and any other binaries that
are needed. Then it could change to 64-bit model and jump to U-Boot proper.
Given U-Boot's extensive 64-bit support this has not been a high priority,
but it would be a nice addition.
TODO List
---------
- Audio
- Chrome OS verified boot
- Building U-Boot to run in 64-bit mode
References
----------