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How to access SNVS_LPCR[TOP] by software on i.MX6

Question asked by Vincent Siles on Mar 14, 2018
Latest reply on Mar 15, 2018 by Vincent Siles

Following my investigation on i.MX6 and JTAG security violation , is it possible to assert SNVS_LPCR[TOP] by software to trigger a software power off ? I'm trying to write to it (after setting SNVS_LPCR[DP_EN]) but I never see the bit set to 1 and the poweroff never happens.


Are there special requirements to do so ? I'm at Supervisor EL1 Secure Mode (TZ) in Non-Secure Mode (SNVS, SSM_ST = 0xb)