Bootloader

This topic discusses features supported in the Bootloader, the component of NVIDIA^® Jetson™ Linux that boots the operating system when the device is powered up or reset.

• UEFI Adaptation

• Switching Between A/B Boot Chains for the Developer Preview

• (Not Yet Fully Supported in This Release) Update and Redundancy describes features that enable a Jetson Linux system to continue running in the even that an attempted software update fails.

Note

• A/B redundancy is not yet fully supported in this Developer Preview release. Users can reference Switching Between A/B Boot Chains for the Developer Preview to get familiar with the A/B layout and manually switching between the A/B boot chains. Full A/B redundancy support will be available in the upcoming GA release.

• T23x Boot Configuration Table
  • BR-BCT
  • MB1-BCT
  • Mem-BCT
  • MB2-BCT
  • Important Notes for Customized Carrier Board
• UEFI Adaptation
  • Sources and Compilation
  • Boot Order Selection
  • Customized Logo:
  • DTB Support
• Switching Between A/B Boot Chains - Developer Preview
  • For NVIDIA^® Jetson AGX Orin™
  • For NVIDIA^® Jetson AGX Xavier™ and NVIDIA^® Jetson Xavier™ NX
• Update and Redundancy
  • A/B Slot Layout
  • A/B System Update
    • Partition Selection
    • Update Engine
  • Bootloader Implementation
    • Partition Settings
    • Update Engine States
  • When the Update Engine is Launched
  • Enabling Bootloader Redundancy
    • To enable redundancy by creating an SMD image
    • To enable redundancy with the nv_update_engine
  • Bootloader Tools
    • Boot Control
    • Bootloader Update Payload Generator
    • Where the BUP File is Stored
    • SMD Image Generator
  • Running the Update Engine
    • To enable/disable rootfs redundancy
    • To Update Bootloader
  • Update Engine State Machine
  • Manually Modifying Boot Slots
    • To manually modify the boot slots
    • To show the current boot slot
    • To show the slot status
  • Sample Boot Log
  • Generating the Bootloader Update Payload (BUP)
    • To generate a single-spec BUP
    • To generate a multi-spec BUP
    • Location of Generated BUP Files