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Sandbox is good example to familiar with U-Boot and related functionalities.

Build

$ git clone git://git.denx.de/u-boot.git
$ cd u-boot
$ make sandbox_defconfig all NO_SDL=1

Run

$ ./u-boot
U-Boot 2017.09-00364-g05eb54a-dirty (Oct 04 2017 - 23:12:50 +0530)

DRAM:  128 MiB
MMC:   
Using default environment

In:    serial
Out:   serial
Err:   serial
SCSI:  Net:   No ethernet found.
IDE:   Bus 0: not available  
=> bdinfo
boot_params = 0x00000000
DRAM bank   = 0x00000000
-> start    = 0x00000000
-> size     = 0x08000000
ethaddr     = 00:00:11:22:33:44
IP addr     = 1.2.3.4

With Sandbox approach, we can further emulate the SPI, Disk, I2C etc., See board/sandbox/README.sandbox for more details.

Test

Sandbox drivers can be available in each peripheral area for basic sanity, below is the procedure to test the same.

Configure

$ cd /path/to/u-boot
$ sudo apt-get install python python-virtualenv
$ virtualenv venv
$ . ./venv/bin/activate
$ pip install pytest

To test sandbox

$ ./test/py/test.py --bd sandbox --build

To test driver model test in sandbox

$ ./test/py/test.py --bd sandbox --build -k ut_dm
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