Boot Sequence

Note

Prior to boot validation, make sure the encoder module is equipped with adequate thermal management solution. A fan and properly installed heat sink are required to reduce temperature by actively exhausting hot air. Lack of a heat sink or fan can cause permanent damage to the assembly boards. See "Fan and Heat Sync" under Integrator's Board Overview.

If the serial port is connected to a PC, you can communicate directly from your computer to the Makito X using a serial communication application such as HyperTerminal or Minicom. From here, you can watch the boot sequence. Following is a sample extract from the boot sequence.

Step 1: Power ON -> Front LED blinks green

JS

Xilinx Zynq MP First Stage Boot Loader

Release 2018.3   Jul  4 2019  -  12:10:18
NOTICE:  ATF running on XCZU7EG/EV/silicon v4/RTL5.1 at 0xfffea000
NOTICE:  BL31: Secure code at 0x0
NOTICE:  BL31: Non secure code at 0x8000000
NOTICE:  BL31: v1.5(release):
NOTICE:  BL31: Built : 14:04:30, Jun 13 2019
PMUFW: v1.1

U-Boot 2018.01 (Jul 04 2019 - 12:02:05 -0400) Xilinx ZynqMP MakitoX4R

I2C:   ready
DRAM:  1.5 GiB
EL Level: EL2
Chip ID: zu7
@@@@ arch_early_init_r @@@@
00000000ff5e0220 == 1
MMC:   sdhci@ff160000: 0 (eMMC)

Bootmode: QSPI_MODE
Net:   phy_marvell_init
ZYNQ GEM: ff0b0000, phyaddr 1, interface sgmii

Step 2: Loading kernel -> Front LED blinks green

JS

## Loading kernel from FIT Image at 10000000 ...
   Using 'conf@1' configuration
   Trying 'kernel@1' kernel subimage
     Description:  Vanilla Linux kernel
     Type:         Kernel Image
     Compression:  gzip compressed
     Data Start:   0x100000ec
     Data Size:    6689942 Bytes = 6.4 MiB
     Architecture: AArch64
     OS:           Linux
     Load Address: 0x00080000
     Entry Point:  0x00080000
     Hash algo:    crc32
     Hash value:   c5f184a5
     Hash algo:    sha1
     Hash value:   78350bf0ec02b1fa185d8efd2c039021db02de1d
   Verifying Hash Integrity ... crc32+ sha1+ OK
## Loading fdt from FIT Image at 10000000 ...
   Using 'conf@1' configuration
   Trying 'fdt@1' fdt subimage
     Description:  Flattened Device Tree blob
     Type:         Flat Device Tree
     Compression:  uncompressed
     Data Start:   0x106616b0
     Data Size:    31614 Bytes = 30.9 KiB
     Architecture: AArch64
     Hash algo:    crc32
     Hash value:   662d3740
     Hash algo:    sha1
     Hash value:   7169142359e374254152de9cece2dba304532ea7
   Verifying Hash Integrity ... crc32+ sha1+ OK
   Booting using the fdt blob at 0x106616b0
   Uncompressing Kernel Image ... OK
   Loading Device Tree to 000000000fff5000, end 000000000ffffb7d ... OK

Step 3: Starting kernel -> Front LED blinks green

JS

Starting kernel ...

Step 4: Initialisation -> Front LED blinks green

JS

INIT: version 2.88 booting

Step 5: Login -> Front LED lights green

JS

LB-MX4RE login:

Note

The approximate boot time when the Ethernet port is connected is 39 sec. When the Ethernet port is not connected, there is a timeout and the boot time is approximately 1.15 minutes.