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Figure 3: Boot Devices
QSPI
Primary Boot Device
Boot FW: Image A
FSBL FW
fsbl.elf
PMU FW
pmufw.elf
ATF
bl31.elf
U-Boot
u-boot.elf
Boot FW: Image B
FSBL FW
fsbl.elf
PMU FW
pmufw.elf
ATF
bl31.elf
U-Boot
u-boot.elf
SD Card
Secondary Boot Device
Linux
image.ub
Root File
System
DTs for Linux
som.dtb
boot.scr
X26536-051122
IMPORTANT! Production SOMs provide both QSPI and eMMC devices on the SOM PCB to support
integrated primary and secondary boot configurations.
Chapter 3: Boot Devices and Firmware Overview
UG1089 (v1.2) July 26, 2022
KV260 Starter Kit
12