Add a usage document for the 'rng' u-boot command.

Signed-off-by: Sughosh Ganu <sughosh.ganu@linaro.org>
Reviewed-by: Ilias Apalodimas <ilias.apalodimas@linaro.org>
Reviewed-by: Simon Glass <sjg@chromium.org>
Signed-off-by: Ilias Apalodimas <ilias.apalodimas@linaro.org>

Start by elaborating on what some of our constraints tend to be with
image location values, and document where these external constraints
can come from.  Provide a new subsection, an example based on the TI
ARMv7 OMAP2PLUS families of chips, that gives sample values and explains
why we use these particular values.  This is based on what is in
include/configs/ti_armv7_common.h as of fb3ad9bd923d ("TI: Add, use a
DEFAULT_LINUX_BOOT_ENV environment string") as this contains just the
values referenced in this document now and not some of the further
additions that are less generic.

Cc: Heinrich Schuchardt <xypron.glpk@gmx.de>
Cc: Simon Glass <sjg@chromium.org>
Signed-off-by: Tom Rini <trini@konsulko.com>
Reviewed-by: Heinrich Schuchardt <heinrich.schuchardt@canonical.com>

Add some information about the 'fdt addr' subcommand, to get things
started.

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

- Explain why fdt_addr and initrd_addr should not be set to disable
  relocation normally.
- Provide some advice on the typical loadaddr default value.

Signed-off-by: Tom Rini <trini@konsulko.com>
Reviewed-by: Simon Glass <sjg@chromium.org>

This variable is never set nor explained why it would be set, drop it.

Signed-off-by: Tom Rini <trini@konsulko.com>
Reviewed-by: Simon Glass <sjg@chromium.org>
Reviewed-by: Heinrich Schuchardt <xypron.glpk@gmx.de>

Add a description and examples for the dm subcommands.

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

cp.b is used a lot as a way to load binaries to memory and execute
them, however we may need to integrate this with the efi subsystem to
set it up as a bootdev.

So, introduce a loadm command that will be consistent with the other
loadX commands and will call the efi API's.

ex: loadm $kernel_addr $kernel_addr_r $kernel_size

with this a kernel with CONFIG_EFI_STUB enabled will be loaded and
then subsequently booted with bootefi command.

Signed-off-by: Rui Miguel Silva <rui.silva@linaro.org>
Reviewed-by: Tom Rini <trini@konsulko.com>

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>

"valu" should be "value".

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