US 12,449,875 B2
Power management system of input-output memory management unit and associated method
Chih-Hsiang Hsiao, Hsinchu (TW); and Chih-Pin Su, Hsinchu (TW)
Assigned to MEDIATEK INC., Hsinchu (TW)
Filed by MEDIATEK INC., Hsin-Chu (TW)
Filed on Sep. 4, 2023, as Appl. No. 18/241,909.
Prior Publication US 2025/0076950 A1, Mar. 6, 2025
Int. Cl. G06F 1/28 (2006.01); G06F 1/30 (2006.01)
CPC G06F 1/28 (2013.01) [G06F 1/30 (2013.01)] 16 Claims
OG exemplary drawing
 
1. A power management system, comprising:
at least one device;
at least one memory management unit (MMU), wherein the at least one MMU corresponds to the at least one device, respectively;
a processor, arranged to execute:
at least one access control power manager;
an operating system (OS), arranged to generate a trigger signal; and
a hypervisor, arranged to generate a first hint according to the trigger signal;
at least one device controller, arranged to control the at least one access control power manager according to the first hint, to manage at least one power of the at least one MMU; and
at least one recovery engine, arranged to perform at least one recovery operation upon the at least one MMU, wherein in response to the at least one MMU being required to be repowered on, the at least one device controller is further arranged to transmit at least one notifying signal to the at least one recovery engine for performing the at least one recovery operation.