sbi command

Synopsis

sb handoff
sb map
sb state

Description

The sb command is used to display information about sandbox’s internal operation. See Sandbox 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.