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AM2634-Q1: can I allocate SBL to space > 0x70040000 (except .vector section)

Will Gao
Intellectual 2335 points
Part Number: AM2634-Q1

Hi BU experts, 

 I am asking this question for customer- VMAX. 

There are one constraint for SBL, i.e. vector section should load at 0x70002000~0x70002100. And the rest sections of SBL are all allocated to the space of 0x70002100~0x70040000 by default in SBL example. But in customer application, they have one further customer boot, i.e. UDS boot. And they want to allocate the UDS boot into 0x70002100~0x70040000. So there is one question: can they allocate SBL to space > 0x70040000 (except .vector section)? Any problem to do so? 

Regards, 

Will 

  • +1
    TI__Mastermind 26145 points

    Hi Will,

    Will Gao said:
    There are one constraint for SBL, i.e. vector section should load at 0x70002000~0x70002100

    Yes. The reason for the same is this "Understanding Eclipse and SBL Image Creation Guide".

    Will Gao said:
    But in customer application, they have one further customer boot, i.e. UDS boot. And they want to allocate the UDS boot into 0x70002100~0x70040000. So there is one question: can they allocate SBL to space > 0x70040000 (except .vector section)? Any problem to do so? 

    Can they consider UDS boot as an application (.appimage) and load it whenever required ? or they want this to be done by ROM ?

    SBL size can go from 0x70000000 to 0x700F0000 (960KiB).

    Best Regards,
    Aakash

  • 0 in reply to Aakash Kedia
    TI__Intellectual 2335 points

    Hi Aakash, 

    The reason they put UDS boot into 0x70002100~0x70040000 is that they don't want the UDS boot overlaps with APP image (UDS and APP should always be in the RAM at run-time, so that they can quickly change to UDS just by modifying the vector at 0x0 space). 

    Aakash Kedia said:
    SBL size can go from 0x70000000 to 0x700F0000 (960KiB)

    Got it, thanks for the confirmation. 

    Regards, 

    Will