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LP-AM243: SBL, QSPI memory configuration, MSRAM memory configuration

Yoshiki
Intellectual 290 points

Part Number: LP-AM243
Other Parts Discussed in Thread: UNIFLASH, SYSCONFIG

Tool/software:

Hello.
All of TI teams

I want to understand SBL, QSPI memory configuration, MSRAM memory configuration using LP-2434.

environment:
  CCS12.7.0
  AM243x MCU+SDK 09.02.01.05
  LP-AM2434
  SBL Appication ospi_multi_partition
  R5F Appication IPC Notify echo

Of two there is a question.
  The first is a basic specification of SBL
  The second is memory allocation of QSPI and MSRAM

Q1. SBL basics specifications: Does RBL load SBL in MSRAM?

  software-dl.ti.com/.../BOOTFLOW_GUIDE.html

  "the RBL will load the secondary bootloader or SBL from a boot media (OSPI flash, SD card or via UART) "
  This is listed.

  The command-line of uart_uniflash.py is as follows.
      python .\uart_uniflash.py -p COM** --cfg=<SDK installation pass>\tools\boot\sbl_prebuilt\am243x-lp\default_sbl_ospi_multi_partition.cfg

  "SBL loads R5F application according to an offset address of flash memory described in default_sbl_ospi_multi_partition.cfg in MSRAM"
  Is my understanding right?

Q2. Memory allocation of .QSPI and MSRAM

  Offset address of default_sbl_ospi_multi_partition.cfg
      512KB per 1BANK
      Figure 1. Cf. QSPI memory image

  MSRAM definition of example.syscfg of ospi_multi_partition Application
      MSRAM_0 320KB, MSRAM_1 is 192KB
      Figure 1. Cf. MSRAM memory image

  MSRAM definition of example.syscfg of IPC Notify echo Application
      256KB
      Figure 1. Cf. MSRAM memory image

  Each BANK size of QSPI does not accord with each BANK size of MSRAM.
  When MSRAM could load SBL definitely, I understood even size disagreement.

  In default_sbl_ospi_multi_partition.cfg, each BANK is 512KB, does SBL come in load definitely even if 768KB and 256KB are mixed?
  It is reference figure 2

Figure 1

Figure 2.

Regards,
Yoshiki Koide

  • 0
    TI__Guru* 77481 points

    Hello,

    A1. Your understanding is correct. The RBL loads SBL from the QSPI offset 0x0. The SBL then loads the Application images from the offsets defined in its Sysconfig. The same offsets must be used in the flash config file (.cfg).

    A2. There is no corelation between the address space size used for flashing the images in QSPI & for running the application in MSRAM. If needed,

    • The flashing offsets can be modified in the SBL's Sysconfig for different application images. The same offsets then must be used in the corresponding flash config file (.cfg).
    • The application's address space can be modified to take less or more space according to the requirements.

    Regards,

    Prashant

  • 0 in reply to Prashant Shivhare
    Intellectual 290 points

    Hello Prashant,

    Thank you for your response. I will check it.
    "This resolved my issue."
    I will post any new or unclear information.

    Regards,
    Yoshiki