[PATCH v4 7/8] doc: uefi: add HTTP Boot support

[Ilias Apalodimas]

On Fri, Sep 22, 2023 at 04:11:18PM +0900, Masahisa Kojima wrote:
> This adds the description about HTTP Boot.
>
> Signed-off-by: Masahisa Kojima <masahisa.kojima at linaro.org>
> ---
>  doc/develop/uefi/uefi.rst | 30 ++++++++++++++++++++++++++++++
>  1 file changed, 30 insertions(+)
>
> diff --git a/doc/develop/uefi/uefi.rst b/doc/develop/uefi/uefi.rst
> index a7a41f2fac..65eea89265 100644
> --- a/doc/develop/uefi/uefi.rst
> +++ b/doc/develop/uefi/uefi.rst
> @@ -594,6 +594,36 @@ UEFI variables. Booting according to these variables is possible via::
>  As of U-Boot v2020.10 UEFI variables cannot be set at runtime. The U-Boot
>  command 'efidebug' can be used to set the variables.
>
> +UEFI HTTP Boot
> +~~~~~~~~~~~~~~
> +
> +HTTP Boot provides the capability for system deployment and configuration
> +over the network. HTTP Boot can be activated by specifying::
> +
> +    CONFIG_CMD_DNS
> +    CONFIG_CMD_WGET
> +    CONFIG_BLKMAP
> +
> +Set up the load option specifying the target URI::
> +
> +    efidebug boot add -u 1 netinst http://foo/bar
> +
> +When this load option is selected as boot selection, resolve the
> +host ip address by dns, then download the file with wget.
> +If the downloaded file extension is .iso or .img file, efibootmgr tries to
> +mount the image and boot with the default file(e.g. EFI/BOOT/BOOTAA64.EFI).
> +If the downloaded file is PE-COFF image, load the downloaded file and
> +start it.
> +
> +There is a limitation that current implementation tries to resolve

Remove the 'There is a limitation that', use The current implementation ...

> +the IP address as a host name. If the uri is like "http://192.168.1.1/foobar",
> +the dns process tries to resolve the host "192.168.1.1" and it will
> +end up with "host not found".
> +
> +We need to preset the "httpserverip" environment variable to proceed the wget::
> +
> +    setenv httpserverip 192.168.1.1
> +
>  Executing the built in hello world application
>  ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
>
> --
> 2.34.1
>

Other than the nit above
Reviewed-by: Ilias Apalodimas <ilias.apalodimas at linaro.org>