公开(公告)号：US20130232364A1

公开(公告)日：2013-09-05

申请号：US13863554

申请日：2013-04-16

Applicant: APPLE INC.

Inventor： Josh P. de Cesare ,  Jung Wook Cho ,  Toshinari Takayanagi ,  Timothy J. Millet

IPC: G06F1/32

CPC classification number: G06F1/26 ,  G06F1/3203 ,  G06F1/3234 ,  G06F1/3237 ,  G06F1/3287 ,  Y02D10/126 ,  Y02D10/128 ,  Y02D10/17 ,  Y02D10/171 ,  Y02D50/20

Abstract: In an embodiment, a power management unit (PMU) may automatically transition (in hardware) the performance states of one or more performance domains in a system. The target performance states to which the performance domains are to transition may be programmable in the PMU by software, and software may signal the PMU that a processor in the system is to enter the sleep state. The PMU may control the transition of the performance domains to the target performance states, and may cause the processor to enter the sleep state. In an embodiment, the PMU may be programmable with a second set of target performance states to which the performance domains are to transition when the processor exits the sleep state. The PMU may control the transition of the performance domains to the second targeted performance states and cause the processor to exit the sleep state.

Abstract translation: 在一个实施例中，功率管理单元（PMU）可以自动地（在硬件中）转换系统中的一个或多个性能域的性能状态。 性能域要转换到的目标性能状态可以通过软件在PMU中编程，并且软件可以向PMU发信号通知系统中的处理器进入睡眠状态。 PMU可以控制性能域到目标性能状态的转换，并且可能导致处理器进入睡眠状态。 在一个实施例中，PMU可以是可编程的，当处理器退出睡眠状态时，性能域将转换到第二组目标性能状态。 PMU可以控制性能域到第二目标性能状态的转换，并使处理器退出睡眠状态。