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a.theriault
Newbie
Newbie
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Registered: ‎01-25-2019

Ultrascale+ PS-Only Reset Procedure

Hello all,

              I'm presently attempting to setup a debugging session on the Ultrascale+ A53 Cores and I find that as I am attempting to attach my debugging pod, several seconds of application execution time seem to elapse in the process, during which several power-on self-tests I intend to investigate take place.  This situation requires me to reset the A53 cores into a known state prior to power-on self-test execution and it would appear from the Ultrascale+ documentation there are several methods for executing a system reset.  The most promising methodology among these appears to be the PS-Only Reset outlined on page 1129 of the UG1085 manual, triggered by a set of direct writes to the Ultrascale+ registers.  My interpretation of the instructions to perform this operation is as follows:

 1. Write a value of 0x00000001 to PMU_GLOBAL.PS_CNTRL at address 0xFFD80004.

2. Write a value of 0x0000000A to PMU_GLOBAL.AIB_CNTRL at address 0xFFD80600.

3. Write a value of 0x00000400 to PMU_GLOBAL.GLOBAL_RESET at address 0xFFD80608.

4. Write a value of 0x00000000 to PMU_GLOBAL.AIB_CNTRL at address 0xFFD80600.

 Unfortunately, I’ve not had much success with this set of commands.  I was wondering if, I had inadvertently missed a step in the sequence or if there is a better method to accomplish a reset of the A53 Core subsystem.

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Registered: ‎11-26-2019

HI did you get a solution for this?

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