Privide a man-page for the printenv command.

Signed-off-by: Heinrich Schuchardt <heinrich.schuchardt@canonical.com>

Provide a man-page for the bootz command.

Signed-off-by: Heinrich Schuchardt <heinrich.schuchardt@canonical.com>

For indicating the address and size of a memory region other commands use a
<addr>[:<size>] syntax. Do the same for bootefi.

Fixes: 2058983689f0 ("cmd: bootefi: restore ability to boot arbitrary blob")
Signed-off-by: Heinrich Schuchardt <heinrich.schuchardt@canonical.com>

%s/cammand/command/
%s/sequencies/sequences/

Signed-off-by: Heinrich Schuchardt <heinrich.schuchardt@canonical.com>
Reviewed-by: Bin Meng <bmeng.cn@gmail.com>

To quote the author:
The bootflow feature provide a built-in way for U-Boot to automatically
boot an Operating System without custom scripting and other customisation.
This is called 'standard boot' since it provides a standard way for
U-Boot to boot a distro, without scripting.

It introduces the following concepts:

   - bootdev - a device which can hold a distro
   - bootmeth - a method to scan a bootdev to find bootflows (owned by
                U-Boot)
   - bootflow - a description of how to boot (owned by the distro)

This series provides an implementation of these, enabled to scan for
bootflows from MMC, USB and Ethernet. It supports the existing distro
boot as well as the EFI loader flow (bootefi/bootmgr). It works
similiarly to the existing script-based approach, but is native to
U-Boot.

With this we can boot on a Raspberry Pi 3 with just one command:

   bootflow scan -lb

which means to scan, listing (-l) each bootflow and trying to boot each
one (-b). The final patch shows this.

With a standard way to identify boot devices, booting become easier. It
also should be possible to support U-Boot scripts, for backwards
compatibility only.

...

The design is described in these two documents:

https://drive.google.com/file/d/1ggW0KJpUOR__vBkj3l61L2dav4ZkNC12/view?usp=sharing

https://drive.google.com/file/d/1kTrflO9vvGlKp-ZH_jlgb9TY3WYG6FF9/view?usp=sharing

Add documentation for this feature, including the commands and full
devicetree bindings.

Signed-off-by: Simon Glass <sjg@chromium.org>

A image_size parameter has been added to the bootefi parameter.
Describe all parameters.

Correct how the description of how the device-path in the loaded
image protocol is determined.

Signed-off-by: Heinrich Schuchardt <heinrich.schuchardt@canonical.com>

Describe the env command.

Signed-off-by: Patrick Delaunay <patrick.delaunay@foss.st.com>

* add link to booti man-page
* correct link description for efidebug command
* correct punctuation

Signed-off-by: Heinrich Schuchardt <heinrich.schuchardt@canonical.com>

Signed-off-by: Tom Rini <trini@konsulko.com>