SWRA760A April   2023  – April 2024 AWR2544 , AWR2944

 

  1.   1
  2.   Abstract
  3.   Trademarks
  4. 1Definitions, Abbreviations, Acronyms
  5. 2Introduction
  6. 3Basic Bootloader Flow
    1. 3.1 Boot Flow Introduction
    2. 3.2 Preparing the Application for Boot
      1. 3.2.1 SBL Image Format
      2. 3.2.2 Signing Scripts
    3. 3.3 ROM Boot
      1. 3.3.1 Boot mode - SFLASH
        1. 3.3.1.1 Image Load Sequence
        2. 3.3.1.2 Boot Mode UART
          1. 3.3.1.2.1 Image Download Sequence
    4. 3.4 SBL Boot
      1. 3.4.1 R5 SBL Flash Offset
      2. 3.4.2 R5 SBL Image Size
  7. 4Conclusion
  8. 5Revision History

3.4.1 R5 SBL Flash Offset

RBL loads primary and secondary SBL image from the following locations:

SBL Image Flash offset
Primary 0x00000000
Secondary 0x00040000

In QSPI Flash mode, the Primary Flash offset address is first checked for a valid certificate and image. If R5F SBL is not present, then the Secondary Flash offset is checked for a valid certificate and image. If none is found, the RBL waits in WFI mode. The Watchdog on the HSM Boot ROM expires (180 seconds) and the system is reset.

If a valid R5F SBL is found, RBL loads that to MSS L2 memory, eclipse ROM to RAM and boot.