Power and Isolation Requests

The power-up, power-down, and isolation service requests for the major subsystems are triggered by setting bits in the PPU global register set. The PLM firmware receives an interrupt request unless the interrupt is masked. The PLM manages the service request interrupts with status and mask registers.

Three power request types are as follows:

• Power up: REQ_PWRUP_TRIG
• Power down: REQ_PWRDWN_TRIG
• Isolation: REQ_ISO_TRIG

For three power domains:

• LPD
• SPD (includes NoC and DDRMC)
• PL