CN103955263B - ARM method for managing power supply and processor - Google Patents
ARM method for managing power supply and processor Download PDFInfo
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- CN103955263B CN103955263B CN201410210025.4A CN201410210025A CN103955263B CN 103955263 B CN103955263 B CN 103955263B CN 201410210025 A CN201410210025 A CN 201410210025A CN 103955263 B CN103955263 B CN 103955263B
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Abstract
The embodiments of the invention provide the method for managing power supply of ARM a kind of and processor.This method includes：Processor in ARM receives the power management request that operating system OS is sent, the processor determines to be managed the target power device according to the power management request with the target power device corresponding to the power management request, the processor operation power management firmware PMF；The PMF is stored in the safer world of the ARM.SCP realization is simulated in the embodiment of the present invention by PMF, and PMF is stored in the safer world in ARM, processor in ARM realizes the power management to power supply apparatus in ARM based on the PMF, SCP entities need not be introduced in ARM, hardware cost is saved, and solves the problem of SCP entities and ARM are incompatible.
Description
Technical field
The present invention relates to the method for managing power supply and processor of the communication technology, more particularly to a kind of ARM.
Background technology
The power management of most of microprocessor (Advanced RISC Machines, abbreviation ARM) is by operating system
(Operation System, abbreviation OS) is controlled, i.e., formulate power management policy by OS and perform power operation.Typically pass through OS
During the power management of carry out system, OS needs the power management operations interface for knowing each power supply apparatus of current system, it is necessary to be
Each power supply apparatus formulates corresponding power management policy.
But OS and platform hardware Environmental coupling, power management operations interface and occupation mode change with the change of platform
Migration is difficult, and OS core power management part and power management policy are relatively fixed, such as only for central processing unit
(Central Processing Unit, abbreviation CPU) performs power management.Whenever platform is newly-increased or changes power management portion
During part, it is required for newly-increased or changes corresponding OS drivings.
With continuing to develop for ARM, ARM component is on the increase, corresponding clock (Clocks), voltage regime
The object such as (Voltage Domains), valtage-gated (Power Gating), sensor (Sensors) and event (Event) is got over
Come more, so that OS not only needs that CPU, internal memory are also needed to be managed above-mentioned object so that ARM power management is increasingly
It is complicated.
System control processor (System Control Processor, abbreviation SCP) can be introduced in ARM at present real
Body, accessory power supply management is carried out by the SCP entities to the above-mentioned object in ARM.Specifically, SCP provides mark for above-mentioned object
Accurate system control processor interface (System Control Processor Interface, abbreviation SCPI), by this
SCPI is monitored and processing system event to the power supply status of power supply apparatus in ARM.
SCPI is the standard interface that AP and SCP is interacted.SCP and SCPI have restrained the function of power supply managing, OS
Departed from using SCP and SCPI from various specific power management operations details, more focus on power management policy.
But above by SCP entities are introduced in ARM, not only increase ARM hardware cost, and for can not be with
SCP carries out compatible ARM, cannot use the OS with SCPI standards.
The content of the invention
The embodiment of the present invention provides a kind of ARM method for managing power supply and processor, to solve due to being introduced in ARM
SCP entities cause ARM hardware cost to increase, and there is the problem of SCP entities can not be compatible with ARM.
The first aspect of the embodiment of the present invention provides a kind of ARM method for managing power supply, including：
Processor in ARM receives the power management request that operating system OS is sent；
The processor is determined and the target power device corresponding to the power management request；
The processor operation power management firmware PMF enters according to the power management request to the target power device
Row management；The PMF is stored in the safer world of the ARM.
With reference in a first aspect, in the first achievable mode, the processor monitors the ARM by the PMF
The power supply status of middle power supply apparatus.
With reference to the first achievable mode of first aspect, in second of achievable mode, the processor fortune
Row power management firmware PMF is managed according to the power management request to the target power device, including：
The processor obtains the current power state by the PMF target power devices monitored；
The processor judges whether to perform by current power states of the PMF according to the target power device
The power management request；
If it is judged that being no, the processor obtains the current electricity with the target power device based on the PMF
The corresponding target adjustment strategy of source state；
The processor uses target power device described in the target adjustment Developing Tactics.
With reference to second of achievable mode of first aspect, in the third achievable mode,
The processor receives security interrupt；
Each power supply apparatus in ARM described in the processor poll, it is determined whether there is abnormal power supply apparatus；
If there is the abnormal power supply apparatus, the processor monitors the abnormal power supply apparatus by the PMF
Current power state；
The processor runs the PMF and obtains the first adjustment plan according to the current power state of the abnormal power supply apparatus
Slightly；
The processor adjusts the abnormal power supply apparatus using first adjustable strategies.
Second with reference to first aspect either the first achievable mode or first aspect of first aspect can be real
Existing mode or the third achievable mode of first aspect, in the 4th kind of achievable mode, the processor connects
The power management request that operating system OS is sent is received, including：
The processor is received described in the OS transmissions by the PMF system control processor interface SCPI provided
Power management request.
Second aspect of the embodiment of the present invention provides a kind of processor, and the processor is arranged in ARM, including：
Receiving module, the power management request for receiving operating system OS transmissions；
Determining module, for determining and the target power device corresponding to the power management request；
Management module, for running power management firmware PMF according to the power management request to the target power device
Part is managed；
Wherein, the PMF is stored in ARM safer world.
With reference to second aspect, in the first achievable mode, in addition to：
Power Monitoring Unit, the power supply status for monitoring power supply apparatus in the ARM by the PMF.
With reference to the first achievable mode of second aspect, in second of achievable mode, the management module, bag
Include：
First acquisition unit, for obtaining the current of the target power device monitored from the Power Monitoring Unit
Power supply status；
Judging unit, for by current power states of the PMF according to the target power device, judging whether to hold
The row power management request；
Second acquisition unit, for after the judging unit is judged not perform the power management request, based on institute
State PMF and obtain target adjustment strategy corresponding with the current power state of the target power device；
Adjustment unit, for using target power device described in the target adjustment Developing Tactics.
With reference to second of achievable mode of second aspect, in the third achievable mode,
The receiving module, is additionally operable to receive security interrupt；
The determining module, is additionally operable in ARM described in poll each power supply apparatus, it is determined whether there is abnormal power device
Part；
The first acquisition unit, is additionally operable to, if there is the abnormal power supply apparatus, obtain from the Power Monitoring Unit
Take the current power state of the abnormal power supply apparatus monitored；
The second acquisition unit, is additionally operable to run current power states of the PMF according to the abnormal power supply apparatus
Obtain the first adjustable strategies；
The adjustment unit, is also used for first adjustable strategies and adjusts the abnormal power supply apparatus.
Second with reference to second aspect either the first achievable mode or second aspect of second aspect can be real
Existing mode or the third achievable mode of second aspect, in the 4th kind of achievable mode, the receiving module,
Please specifically for the system control processor interface SCPI provided by the PMF the power managements for receiving the OS transmissions
Ask.
Processor in a kind of ARM provided in an embodiment of the present invention method for managing power supply and processor, ARM receives operation
The power management request that system OS is sent, the processor is determined and the target power device corresponding to the power management request
Part, the processor operation power management firmware PMF is managed according to the power management request to the target power device
Reason；The PMF is stored in the safer world of the ARM.SCP realization is simulated in the embodiment of the present invention by PMF, and
PMF is stored in the safer world in ARM, the processor in ARM realizes the electricity to power supply apparatus in ARM based on the PMF
Source control, it is not necessary to SCP entities are introduced in ARM, saves hardware cost, and solves SCP entities and ARM is incompatible asks
Topic.
Brief description of the drawings
The structural representation that Fig. 1 is Trustzone in ARM systems；
Fig. 2 is a kind of structural representation of the method for managing power supply for ARM that the embodiment of the present invention one is provided.
The running environment that Fig. 3 is PMF in the embodiment of the present invention one；
Fig. 4 is OS provided in an embodiment of the present invention and the schematic diagram of PMF interactions；
Fig. 5 is a kind of schematic diagram of the method for managing power supply for ARM that the embodiment of the present invention two is provided；
Fig. 6 is the schematic diagram for the security interrupt repeating process that the embodiment of the present invention two is provided；
Fig. 7 is a kind of structural representation for processor that the embodiment of the present invention three is provided；
Fig. 8 is a kind of structural representation for processor that the embodiment of the present invention four is provided.
Embodiment
Below by drawings and examples, technical scheme is described in further detail.
Trust region (Trustzone) has introduced brand-new safe condition to ARM architecture, to determine the OS in ARM
Whether operate under safe or dangerous environment.Trustzone has separated the performing environment of two isolation：Normal running environment
(Normal World) and safer world (Secure World), the two are controlled by monitoring module (Monitor Module)
Conversion between environment, so as to avoid the leakage of key message, as shown in Figure 1.
Embodiment one
Fig. 2 is a kind of schematic flow sheet of the method for managing power supply for ARM that the embodiment of the present invention one is provided.As shown in Fig. 2
The method for managing power supply of the ARM comprises the following steps：
101st, the processor in ARM receives the power management request that operating system OS is sent.
102nd, processor is determined and the target power device corresponding to power management request.
103rd, processor operation power management firmware PMF is managed according to power management request to target power device.
Wherein, the PMF is stored in the safer world of the ARM.
In the present embodiment, basic input output system (Base Input/Output System, abbreviation are first turned on
BIOS), when BIOS is in starting state, BIOS has systematic highest authority, can set the security attribute of system, can be with
Some programs are installed into Secure World.BIOS adds power management firmware (Power Management Firmware)
It is downloaded in ARM Secure World.Wherein, BIOS loadings PMF flow is identical with the loading flow of common security module, all
Need to work in protection memory field, such PMF operating process will not be by external world's perception, and security is higher.
The running environment that Fig. 3 is PMF in the embodiment of the present invention one.As shown in figure 3, the monitoring module in PMF and processor
Operate in Secure World, OS is operated under Normal World.OS and PMF can be handed over by the monitoring module
Mutually.
In the present embodiment, PMF can provide the SCPI of mark standard, and the OS so operated in Normal World still can
Enough SCPI according to standard send power management request to processor, and power management request is sent to by processor based on SCPI
PMF is performed.
Specifically, the processor in Advanced Reduced Instruction Set machine (Advanced RISC Machines, abbreviation ARM) connects
Receive the power management request that the OS operated under Normal World is sent.
After power management request is received, processor is capable of determining that the power management request asks the object of management
That is target power device.For example, the frequency for the power management request request reduction internal memory that OS is sent, processor receives the power supply
After management request, it is internal memory that power supply apparatus to be managed can be learnt according to the power management request.Wherein, the power supply in ARM
Device can include device, the clocks such as processor, internal memory, hard disk, screen etc..
Further, after target power device is determined, processor, which can be run, to be stored under Secure World
PMF, is managed according to power management request to target power device.Specifically, after power management request is received, processing
Power management request is written in PMF by device, performs power management request by PMF, target power device is adjusted into power supply
Manage the state required by request.For example, OS does not receive instruction monitoring screen in certain time length, in order to reduce energy
Consumption, OS can send the power management request for closing screen to processor, and processor can just perform closing screen based on PMF
This request, to reach the purpose of energy-conservation.
Fig. 4 is OS provided in an embodiment of the present invention and the schematic diagram of PMF interactions.As shown in figure 4, the OS is run
Under Normal World, including：OS power managements (OS Power Management, abbreviation OSPM) module, power supply status are coordinated
Interface (Power State Coordination Interface, abbreviation PSCI) module, SCPI modules and Trustzone communications
Module.
Wherein, the OSPM module operated under Normal World sends power management request using PSCI forms, passes through
PSCI modules are received and parsed is sent to SCPI modules by power management request, and SCPI modules generate the power management of SCPI forms
Request, then please by the power management by Trustzone communication modules (Trustzone Communication Module)
Ask to carry and be sent in ARM monitoring system calls (System Monitor Call, abbreviation SMC) to instruct in processor
Monitoring module.Wherein, as shown in figure 3, the monitoring module is operated under Secure World.
Further, the power management request is written in PMF by monitoring module based on the SCPI in PMF, by PMF according to
The power management request is managed to target power device.In the present embodiment, PMF can provide the SCPI of standard, so as to locate
Reason device can receive the power management request of OS transmissions.
Further, the behaviour of power management will can be set in the security of power management, the present embodiment in PMF in order to improve
Make region for safety zone, only operated by the PMF, protect power management operations region not destroyed by malicious code.
Further, the processor in the present embodiment can also monitor the power supply status of power supply apparatus in ARM by PMF,
Adjust power parameter of power supply apparatus etc. in ARM.Specifically, PMF is by reading each processor sensor, voltage sensor in ARM
Device, temperature sensor (Processor, Voltage, Temperature Sensor, abbreviation PVT Sensor), in ARM
The power supply status of power supply apparatus is monitored.
Alternatively, processor operation PMF is managed according to power management request to target power device, including：Processing
Device obtains the current power state by the PMF target power devices monitored, based on PMF according to the current of target power device
Power supply status, judges whether to perform power management request, if it is judged that being no, processor is based on PMF and obtained and target electricity
The corresponding target adjustment strategy of current power state of source device, uses target adjustment Developing Tactics target power device.
For example, be typically provided with the load judgment standard for being used in different model processor in OS, when monitoring processing
When the load of device is 1.5G, then after the load of OS then decision processors reaches 50%, full core operation can be now sent to processor
Power management request.But the processor operation PMF in the present embodiment is monitored to its state, and it is stored with PMF
The model of processor and the processor actual corresponding loading condition in 1.5G, so that PMF can be than OS more accurately
The load for monitoring processor is 40%, and at this moment processor is according to the load 40% judged when dispatching from the factory in PMF, to obtain to place
Manage the target adjustment strategy of device.In the present embodiment, when judging when load is 40%, it is not necessary to during full core operation processor,
For example, target adjustment strategy is by the frequency upgrading of processor to 80% operation, then processor is by its frequency upgrading to 80%, with to
Up to the purpose for saving the energy.In the present embodiment, processor can carry out the adjustment of detailed rules and regulations based on PMF to the power supply apparatus in ARM.
The method for managing power supply for the ARM that the present embodiment is provided, processor receives the power management request that OS is sent, it is determined that with
The corresponding target power device of power management request, operation PMF is managed according to power management request to target power device.
SCP realization is simulated in the present embodiment by PMF, and PMF is stored in the safer world in ARM, the processor in ARM
Power management to power supply apparatus in ARM is realized based on the PMF, it is not necessary in ARM introduce SCP entities, save hardware into
This, and solve the problem of SCP entities and ARM are incompatible.
Embodiment two
Fig. 5 is a kind of schematic diagram of the method for managing power supply for ARM that the embodiment of the present invention two is provided.In above-described embodiment one
On the basis of, the method for managing power supply of the ARM also includes：
201st, processor receives security interrupt.
Cycle security interrupt (Secure Interrupt) is provided with the present embodiment, wherein security interrupt is in safety
What disconnected timer was periodically produced.Processor can be periodically obtaining security interrupt.
Fig. 6 is the schematic diagram for the security interrupt repeating process that the embodiment of the present invention two is provided.As shown in fig. 6, in safety
Disconnected timer is produced after security interrupt, and security interrupt is sent into processor, judges whether OS is currently in by processor
Under Normal World, if it is judged that OS is currently under Normal World, security interrupt is first sent to fortune by processor
Monitoring module of the row under Secure World, then PMF is written to by monitoring module, the security interrupt is performed by PMF.If OS
It is not under Normal World, security interrupt is directly written to PMF by processor.
202nd, each power supply apparatus in processor poll ARM, it is determined whether there is abnormal power supply apparatus.
The power devices such as clock, internal memory, hard disk, voltage regime, valtage-gated, sensor, CPU can be included in general ARM
Part.In the present embodiment after security interrupt is received, processor can be with each power supply apparatus in poll ARM, to determine institute in ARM
Have in power supply apparatus with the presence or absence of abnormal power supply apparatus.
203rd, processor monitors the current power state of abnormal power supply apparatus by PMF.
Processor can be monitored by running PMF to abnormal power supply apparatus, and detailed process can be found in above-described embodiment
To the monitoring of power supply apparatus in ARM in one.
204th, processor operation PMF obtains the first adjustable strategies according to the current power state of abnormal power supply apparatus.
In the current power state of the abnormal power supply apparatus monitored, processor runs PMF according to abnormal power supply apparatus
Current power state obtains corresponding first adjustable strategies.
205th, processor adjusts abnormal power supply apparatus using the first adjustable strategies.
After the first adjustable strategies are got, processor can just use first adjustable strategies, to abnormal power supply apparatus
It is adjusted.For example, within save as example, processor is received after security interrupt, each power supply apparatus of poll, when monitoring internal memory
Temperature it is too high, processor can determine that in the presence of abnormal power supply apparatus be the internal memory, then processor, which is based on PMF, to obtain
To automatic reduction clock frequency to reduce the first adjustable strategies of caloric value, computing device first adjustable strategies are internally deposited into
Row power management, so as to ensure the safety of internal memory.The OS that whole process processing need not be operated under Normal World is participated in, should
Process is not also perceived by OS.
In the present embodiment, processor can be not only monitored based on PMF to the power supply status of power supply apparatus in ARM, and
And periodic safety interruption is introduced in power management firmware, the power supply pipe independently of OS can be provided for ARM power management
Reason strategy so that ARM power management procedure is more flexible.
Embodiment three
Fig. 7 is a kind of structural representation for processor that the embodiment of the present invention three is provided.As shown in fig. 7, the processor bag
Include：Receiving module 31, determining module 32 and management module 33.
Wherein, receiving module 31, the power management request for receiving operating system OS transmissions.
Determining module 32, for determining and the target power device corresponding to the power management request.
Management module 33, for running power management firmware PMF according to the power management request to the target power
Device is managed.
Wherein, the PMF is stored in ARM safer world.Introduction on safer world (Secure World)
Reference can be made in above-described embodiment one related content record, here is omitted.
BIOS is first turned on, when BIOS is in starting state, BIOS has systematic highest authority, can set system
Security attribute, some programs can be installed into Secure World.
In the present embodiment, PMF is loaded into ARM Secure World by BIOS.Wherein, the management of BIOS loading powers is solid
The flow of part is identical with the loading flow of common security module, is required for working in protection memory field.PMF is loaded into
In Secure World, PMF running environment can be found in the record related to Fig. 3's of above-described embodiment one, and here is omitted.
Fig. 4 is the schematic diagram of OS provided in an embodiment of the present invention and PMF interactions, can on OS and PMF interactions
Recorded referring to above-described embodiment one is related to Fig. 4's, here is omitted.
Each functional module of the electric power controller for the ARM that the present embodiment is provided can be used for performing shown in above-described embodiment
ARM power management method flow, its concrete operating principle repeats no more, and refers to the description of embodiment of the method.
In the present embodiment, processor receives the power management request that OS is sent, it is determined that mesh corresponding with power management request
Power supply apparatus is marked, operation PMF is managed according to power management request to target power device.In the present embodiment by PMF come
SCP realization is simulated, and PMF is stored in the safer world in ARM, the processor in ARM, which is based on the PMF, to be realized pair
The power management of power supply apparatus in ARM, it is not necessary to SCP entities are introduced in ARM, saves hardware cost, and it is real to solve SCP
The problem of body and ARM are incompatible.
Example IV
Fig. 8 is a kind of structural representation for processor that the embodiment of the present invention four is provided.As shown in figure 8, the processor is removed
Include outside receiving module 31, determining module 32 and the management module 33 in above-described embodiment three, in addition to Power Supply Monitoring mould
Block 34.
Wherein, the Power Monitoring Unit 34, the power supply shape for monitoring power supply apparatus in the ARM by the PMF
State.
Further, one kind of management module 33 alternatively realizes that structure includes：First acquisition unit 331, judging unit
332nd, second acquisition unit 333 and adjustment unit 334.
Wherein, first acquisition unit 331, for obtaining the target power monitored from the Power Monitoring Unit 34
The current power state of device.
Judging unit 332, for by current power states of the PMF according to the target power device, judgement is
It is no to perform the power management request.
Second acquisition unit 333, for after the judging unit 332 is judged not perform the power management request,
Target adjustment strategy corresponding with the current power state of the target power device is obtained based on the PMF.
Adjustment unit 334, for using target power device described in the target adjustment Developing Tactics.
Further, the receiving module 31, is additionally operable to receive security interrupt.
The determining module 32, is additionally operable in ARM described in poll each power supply apparatus, it is determined whether there is abnormal power device
Part.
The first acquisition unit 331, is additionally operable to if there is the abnormal power supply apparatus, from the Power Monitoring Unit
The current power state of the abnormal power supply apparatus monitored is obtained in 34.
The second acquisition unit 332, is additionally operable to run current power shapes of the PMF according to the abnormal power supply apparatus
State obtains the first adjustable strategies.
The adjustment unit 334, is also used for first adjustable strategies and adjusts the abnormal power supply apparatus.
The receiving module 31, institute is received specifically for the system control processor interface SCPI provided by the PMF
State the power management request of OS transmissions.
Each functional module of the electric power controller for the ARM that the present embodiment is provided can be used for performing shown in above-described embodiment
ARM power management method flow, its concrete operating principle repeats no more, and refers to the description of embodiment of the method.
In the present embodiment, processor can be not only monitored based on PMF to the power supply status of the power supply apparatus in ARM,
And periodic safety interruption is introduced in PMF, the power management policy independently of OS can be provided for ARM power management,
So that ARM power management procedure is more flexible.
Finally it should be noted that：Various embodiments above is merely illustrative of the technical solution of the present invention, rather than its limitations；To the greatest extent
The present invention is described in detail with reference to foregoing embodiments for pipe, it will be understood by those within the art that：Its according to
The technical scheme described in foregoing embodiments can so be modified, or which part or all technical characteristic are entered
Row equivalent substitution；And these modifications or replacement, the essence of appropriate technical solution is departed from various embodiments of the present invention technology
The scope of scheme.
Claims (8)
1. a kind of Advanced Reduced Instruction Set machine ARM method for managing power supply, it is characterised in that including：
Processor in ARM receives the power management request that operating system OS is sent；
The processor is determined and the target power device corresponding to the power management request；
The processor operation power management firmware PMF is managed according to the power management request to the target power device
Reason；
Wherein, the PMF is stored in the safer world of the ARM；
The processor receives the power management request that operating system OS is sent, including：
The processor receives the power supply that the OS is sent by the PMF system control processor interface SCPI provided
Management request.
2. ARM according to claim 1 method for managing power supply, it is characterised in that also include：The processor passes through institute
State the power supply status that PMF monitors power supply apparatus in the ARM.
3. ARM according to claim 2 method for managing power supply, it is characterised in that the processor runs power management
Firmware PMF is managed according to the power management request to the target power device, including：
The processor obtains the current power state by the PMF target power devices monitored；
The processor judges whether that execution is described by current power states of the PMF according to the target power device
Power management request；
If it is judged that being no, the processor obtains the current power shape with the target power device based on the PMF
The corresponding target adjustment strategy of state；
The processor uses target power device described in the target adjustment Developing Tactics.
4. ARM according to claim 3 method for managing power supply, it is characterised in that also include：
The processor receives security interrupt；
Each power supply apparatus in ARM described in the processor poll, it is determined whether there is abnormal power supply apparatus；
If there is the abnormal power supply apparatus, the processor monitors working as the abnormal power supply apparatus by the PMF
Preceding power supply status；
The processor runs the PMF and obtains the first adjustable strategies according to the current power state of the abnormal power supply apparatus；
The processor adjusts the abnormal power supply apparatus using first adjustable strategies.
5. a kind of processor, it is characterised in that the processor is arranged in ARM, including：
Receiving module, the power management request for receiving operating system OS transmissions；
Determining module, for determining and the target power device corresponding to the power management request；
Management module, enters for running power management firmware PMF according to the power management request to the target power device
Row management；
Wherein, the PMF is stored in ARM safer world；
The receiving module, receives the OS specifically for the system control processor interface SCPI provided by the PMF and sends out
The power management request sent.
6. processor according to claim 5, it is characterised in that also include：
Power Monitoring Unit, the power supply status for monitoring power supply apparatus in the ARM by the PMF.
7. processor according to claim 6, it is characterised in that the management module, including：
First acquisition unit, the current power for obtaining the target power device monitored from the Power Monitoring Unit
State；
Judging unit, for by current power states of the PMF according to the target power device, judging whether to perform institute
State power management request；
Second acquisition unit, for after the judging unit is judged not perform the power management request, based on the PMF
Obtain target adjustment strategy corresponding with the current power state of the target power device；
Adjustment unit, for using target power device described in the target adjustment Developing Tactics.
8. processor according to claim 7, it is characterised in that also include：
The receiving module, is additionally operable to receive security interrupt；
The determining module, is additionally operable in ARM described in poll each power supply apparatus, it is determined whether there is abnormal power supply apparatus；
The first acquisition unit, is additionally operable to if there is the abnormal power supply apparatus, obtains and supervises from the Power Monitoring Unit
The current power state for the abnormal power supply apparatus controlled；
The second acquisition unit, is additionally operable to run the PMF according to the acquisition of the current power state of the abnormal power supply apparatus
First adjustable strategies；
The adjustment unit, is also used for first adjustable strategies and adjusts the abnormal power supply apparatus.
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| CN101789230A (en) * | 2009-01-24 | 2010-07-28 | 联想(北京)有限公司 | Electronic equipment and display device screen brightness adjusting method thereof |
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| CN103076868A (en) * | 2013-01-06 | 2013-05-01 | 威盛电子股份有限公司 | Power supply management method and electronic system utilizing same |
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| CN103955263A (en) | 2014-07-30 |
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