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.. SPDX-License-Identifier: GPL-2.0+
.. index::
single: sb (command)
sb command
==========
Synopsis
--------
::
sb handoff
sb map
sb state
Description
-----------
The *sb* command is used to display information about sandbox's internal
operation. See :doc:`/arch/sandbox/index` for more information.
sb handoff
~~~~~~~~~~
This shows information about any handoff information received from SPL. If
U-Boot is started from an SPL build, it shows a valid magic number.
sb map
~~~~~~
This shows any mappings between sandbox's emulated RAM and the underlying host
address-space.
Fields shown are:
Addr
Address in emulated RAM
Mapping
Equivalent address in the host address-space. While sandbox requests address
``0x10000000`` from the OS, this is not always available.
Refcnt
Shows the number of references to this mapping.
sb state
~~~~~~~~
This shows basic information about the sandbox state, currently just the
command-line with which sandbox was started.
Example
-------
This shows checking for the presence of SPL-handoff information. For this to
work, ``u-boot-spl`` must be run, with build that enables ``CONFIG_SPL``, such
as ``sandbox_spl``::
=> sb handoff
SPL handoff magic 14f93c7b
This shows output from the *sb map* subcommand, with a single mapping::
Sandbox memory-mapping
Addr Mapping Refcnt
ff000000 000056185b46d6d0 2
This shows output from the *sb state* subcommand::
=> sb state
Arguments:
/tmp/b/sandbox/u-boot -D
Configuration
-------------
The *sb handoff* command is only supported if CONFIG_HANDOFF is enabled.
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