On 06/12/2018 05:36 PM, Bin Meng wrote:
> Since commit f3b5056c4e72 ("efi_loader: split README.efi into two
> separate documents"), the original README.efi was renamed to
> README.u-boot_on_efi, but x86 doc still refers to the old one.
>
> This updates the x86 doc to reference both README.u-boot_on_efi and
> README.uefi.
>
> Signed-off-by: Bin Meng <bmeng...@gmail.com>
> ---
>
> Changes in v2:
> - update the x86 doc to reference also README.uefi
>
> doc/README.x86 | 14 +++++++-------
> 1 file changed, 7 insertions(+), 7 deletions(-)
>
> diff --git a/doc/README.x86 b/doc/README.x86
> index 78664c3..9f657df 100644
> --- a/doc/README.x86
> +++ b/doc/README.x86
> @@ -1134,18 +1134,18 @@ the "Power" submenu from the Windows start menu.
> EFI Support
> -----------
> U-Boot supports booting as a 32-bit or 64-bit EFI payload, e.g. with UEFI.
> -This is enabled with CONFIG_EFI_STUB. U-Boot can also run as an EFI
> -application, with CONFIG_EFI_APP. The CONFIG_EFI_LOADER option, where U-Booot
> -provides an EFI environment to the kernel (i.e. replaces UEFI completely but
> -provides the same EFI run-time services) is not currently supported on x86.
> +This is enabled with CONFIG_EFI_STUB to boot from both 32-bit and 64-bit
> +UEFI BIOS. U-Boot can also run as an EFI application, with CONFIG_EFI_APP.
> +The CONFIG_EFI_LOADER option, where U-Booot provides an EFI environment to
> +the kernel (i.e. replaces UEFI completely but provides the same EFI run-time
> +services) is not currently supported on x86.
Do you mean
"is not currently supported on x86 in conjunction with EFI_STUB"
or do you mean
"still has bugs on x86"?
On qemu-x86_defconfig I can start EFI applications like the
helloworld.efi and ipxe. It is only the Linux kernel that has a problem
with memory setup. That is of cause a bug that needs further attention.
Best regards
Heinrich
>
> -See README.efi for details of EFI support in U-Boot.
> +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. It also supports (with CONFIG_EFI_STUB) booting from
> -both 32-bit and 64-bit UEFI. However, U-Boot itself is currently always built
> +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().
>
>
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