diff options
| author | Bin Meng <bmeng.cn@gmail.com> | 2018-10-13 20:52:04 -0700 |
|---|---|---|
| committer | Bin Meng <bmeng.cn@gmail.com> | 2018-10-22 17:51:45 +0800 |
| commit | 0e028bf970b4f99d10970f3fa851caf1783a3c34 (patch) | |
| tree | e16df9a91f0f4fa4dcb62fdf3d80b8ce525d97a5 /doc/README.x86 | |
| parent | 6feb2ff502882c687727e2f3e96dd40cb4284007 (diff) | |
x86: doc: Remove stale sections of 64-bit support
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This apparently is out of date.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>
Diffstat (limited to 'doc/README.x86')
| -rw-r--r-- | doc/README.x86 | 17 |
1 files changed, 0 insertions, 17 deletions
diff --git a/doc/README.x86 b/doc/README.x86 index 22bfbabe02..fa49cb8b8a 100644 --- a/doc/README.x86 +++ b/doc/README.x86 @@ -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 ---------- |