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PROCESSOR-SDK-AM64X: mpu init

Jun Tu
Expert 1620 points
Part Number: PROCESSOR-SDK-AM64X


Hi, 

1.Will mpu configuration reset in each reboot, software reboot?

2.Can I config mpu configruration only in fsbl ?   eg: at step:   loadJSFile "C:/ti/mcu_plus_sdk_am64x_08_05_00_24/tools/ccs_load/am64x/load_dmsc_hsfs.js"

in  step fsbl,  I found ddr is fully configured, and in the ssbl, we don't need to configure again ddr. is this applicable to mpu configuration as well?

Thanks.

  • 0
    TI__Guru 74911 points

    Hi Jun,

    The MPU configuration needs to be done at each different boot stage of the Cortex R5F core.

    Regards,

    Prashant

  • 0 in reply to Prashant Shivhare
    Expert 1620 points

    Question, 1. Does Mpu resets when there is a soft reboot. if it is resets, who resets the Mpu?  

                     2. Inside the code, are we able to remove the mpu resets?  I mean if mpu stays the same, it does't need to configured each time, right?

    Thanks

  • +1 in reply to Jun Tu
    TI__Guru 74911 points

    Hi Jun,

    The MPU is Cortex R5F core's specific concept. To understand the full behaviour of the MPU configuration, I would request you to refer to the Cortex R5F TRM.

    Jun Tu said:
    Inside the code, are we able to remove the mpu resets?  I mean if mpu stays the same, it does't need to configured each time, right?

    There is no separate reset for MPU. It gets reset as part of resetting the Cortex R5F core for booting the next stage application.

    Regards,

    Prashant