Slot Power Limit Control
Software is responsible for determining the maximum amount of power that an expansion device is allowed to consume. This power allocation is based on the power partitioning within the system, thermal capabilities, etc. Knowledge of the system's power and thermal limits comes from system firmware. The firmware or power manager (which receives power information from firmware) is responsible for reporting the power limits to each expansion port.
Expansion Port Delivers Slot Power Limit
Software writes to the Slot Power Limit Value and Slot Power Limit Scale fields of the Slot Capability register to specify the maximum power that can be consumed by the device. Software is required to specify a power value that reflects one ...
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