CN103345425A - Method for achieving control over rotation speed of system fan through SMI interruption - Google Patents
Method for achieving control over rotation speed of system fan through SMI interruption Download PDFInfo
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- CN103345425A CN103345425A CN2013102014907A CN201310201490A CN103345425A CN 103345425 A CN103345425 A CN 103345425A CN 2013102014907 A CN2013102014907 A CN 2013102014907A CN 201310201490 A CN201310201490 A CN 201310201490A CN 103345425 A CN103345425 A CN 103345425A
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Abstract
The invention discloses a method for achieving control over the rotation speed of a system fan through SMI interruption, and belongs to the technical field of computers. The method comprises the steps that in the starting and initializing processes of a BIOS, a register of a south bridge chip set is configured, and the south bridge chip set is made to produce SMI interruption signals at intervals to a CPU; after receiving the SMI interruption signals, the CPU enters an SMM mode, and a system control right is transferred into an SMI handler of the BIOS; a code for detecting the temperature of the CPU, a code for detecting environment temperature and a code for detecting the rotation speed of the fan are added in the SMI handler of the BIOS; the SMI handler of the BIOS controls the rotation speed of the fan. Compared with the prior art, the method for achieving control over the rotation speed of the system fan through SMI interruption is more flexible, timelier in alarming and more accurate in judgment.
Description
Technical field
The present invention relates to a kind of field of computer technology, specifically a kind of method of interrupting realizing the control of system fan rotating speed by SMI.
Background technology
The control of traditional system fan rotating speed can realize by special external circuits, also can realize by the rotation speed of the fan control module in the Super IO chip.
No matter being special circuit or the rotation speed of the fan control module in the Super IO chip, all is the temperature that obtains environment according to temperature sensor, and the monitoring by to cpu temperature or mainboard temperature automatically rotation speed of the fan controls.Can set the threshold value of one group of temperature, set the rotating speed of corresponding fan in each temperature stage, the rotating speed of fan is adjusted automatically along with the mainboard variation of temperature.Perhaps set a rate of curve, make rotation speed of the fan along with variation of temperature changes gently and automatically.Can also set in the Super IO chip and after CPU or mainboard temperature reach certain threshold value, produce one and interrupt or allow hummer sound reporting to the police.Perhaps when fan breaks down, also produce and interrupt and warning.
If certain temperature sensor fails uses special external circuits mode or Super IO mode just can't make correct judgement, also just can't control effectively rotation speed of the fan.Might cause false alarm or not warning like this.Also can't make correct judgement in time if the fan control module in the Super IO chip breaks down, have certain limitation for the control of CPU and system temperature.
Summary of the invention
Technical assignment of the present invention is at above weak point, and a kind of dirigibility that has more is provided, and it is more timely to report to the police, and judges a kind of method of interrupting realizing the control of system fan rotating speed by SMI more accurately.
The technical solution adopted for the present invention to solve the technical problems is:
Step is:
(1), in the process of BIOS opening initialization, the register of South Bridge chip group is configured, allow the South Bridge chip group intermittently produce the SMI look-at-me and give CPU;
(2), CPU enters the SMM pattern after receiving the SMI look-at-me, system's control is transferred among the SMI handler of BIOS;
(3), in the SMI of BIOS Handler, add the code that cpu temperature detects, add the code that environment temperature detects, add the code that rotation speed of the fan detects;
(4), the SMI Handler of BIOS control rotation speed of the fan.
The monitoring temperature module is connected to the SMI handler of South Bridge chip group and BIOS; The SMI handler of South Bridge chip group and BIOS is connected to fan control module; Fan control module is connected to the SMI handler of BIOS.
The monitoring temperature module is connected to the South Bridge chip group by lpc bus or I2C bus; The South Bridge chip group is connected to fan control module by lpc bus or I2C bus.
Detailed step is:
(1), by to the configuration of South Bridge chip group related register, allow the South Bridge chip group can intermittently produce the SMI look-at-me and give CPU;
(2), will be in the time interval of setting after the BIOS start, system's control is transferred among the SMI handler of BIOS;
(3), in the SMI of BIOS Handler, add the code that code that cpu temperature detects and environment temperature detect, obtain cpu temperature and environment temperature situation; Add the code that rotation speed of the fan detects, can obtain the real-time rotating speed of cpu fan, system fan;
(4), the SMI Handler of BIOS is by the real-time rotating speed to cpu temperature and environment temperature and cpu fan, system fan, makes a comprehensive judgement, control the rotating speed of cpu fan or system fan, and determine the amplitude that rotation speed of the fan is adjusted.
If after adjusting rotation speed of the fan, find that detected rotation speed of the fan do not make corresponding adjustment, fault has taken place in the rotation speed of the fan control module that just can judge this part, or the rotation speed of the fan testing circuit is out of joint, thereby sends warning.If after adjusting rotation speed of the fan, detected corresponding rotation speed of the fan has been made correct variation, but the temperature detection value of correspondence does not change with it, so just might be that fault has appearred in the monitoring temperature module; Can make a comprehensive judgement according to various situations, the strategy of making adjustment again perhaps produces alerting signal.
BIOS is the abbreviation of English " Basic Input Output System ", and literally the back Chinese is exactly " Basic Input or Output System (BIOS) ".It is one group of program that is cured in the computing machine on the mainboard on the rom chip, the program of the most important basic input and output of its in store computing machine, system's configuration information, start back self-check program and system's self-triggered program.Its major function provides the bottom, the most direct hardware setting and control for computing machine.
SMI, English full name System Management Interrupt is translated as system management interrupt.
SMM, English full name System Management Mode is translated as System Management Mode.
A kind of method by the control of SMI interruption realization system fan rotating speed of the present invention is compared with prior art, has the following advantages:
1, owing to use intermittent smi signal to interrupt, the SMI Handler of BIOS can monitor in real time to cpu temperature and environment temperature and cpu fan and system fan;
2, can be because of the fault of circuit, or the fault that produces of Super IO, and cause judging in time and controlling and to produce alerting signal;
3, can be by the temperature of CPU and the temperature of other each parts of mainboard be comprehensively judged, the control of rotation speed of the fan is had very big degree of freedom;
4, adjust the rotating speed of cpu fan or system fan according to cpu temperature or system environments temperature, after cpu temperature or mainboard temperature reach a threshold value, send alerting signal.
Description of drawings
The present invention is further described below in conjunction with accompanying drawing.
Accompanying drawing 1 is a kind of structured flowchart that interrupts the method for realization system fan rotating speed control by SMI.
Embodiment
The invention will be further described below in conjunction with the drawings and specific embodiments.
A kind of method of interrupting the control of realization system fan rotating speed by SMI of the present invention, step is:
(1), in the process of BIOS opening initialization, the register of South Bridge chip group is configured, allow the South Bridge chip group intermittently produce the SMI look-at-me and give CPU;
(2), CPU enters the SMM pattern after receiving the SMI look-at-me, system's control is transferred among the SMI handler of BIOS;
(3), in the SMI of BIOS Handler, add the code that cpu temperature detects, add the code that environment temperature detects, add the code that rotation speed of the fan detects;
(4), the SMI Handler of BIOS control rotation speed of the fan.
The monitoring temperature module is connected to the SMI handler of South Bridge chip group and BIOS; The SMI handler of South Bridge chip group and BIOS is connected to fan control module; Fan control module is connected to the SMI handler of BIOS.
The monitoring temperature module is connected to the South Bridge chip group by lpc bus or I2C bus; The South Bridge chip group is connected to fan control module by lpc bus or I2C bus.
Detailed step is:
(1), by to the configuration of South Bridge chip group related register, allow the South Bridge chip group can intermittently produce the SMI look-at-me and give CPU;
(2), will be in the time interval of setting after the BIOS start, system's control is transferred among the SMI handler of BIOS;
(3), in the SMI of BIOS Handler, add the code that code that cpu temperature detects and environment temperature detect, obtain cpu temperature and environment temperature situation; Add the code that rotation speed of the fan detects, can obtain the real-time rotating speed of cpu fan, system fan;
(4), the SMI Handler of BIOS is by the real-time rotating speed to cpu temperature and environment temperature and cpu fan, system fan, makes a comprehensive judgement, control the rotating speed of cpu fan or system fan, and determine the amplitude that rotation speed of the fan is adjusted.
If after adjusting rotation speed of the fan, find that detected rotation speed of the fan do not make corresponding adjustment, fault has taken place in the rotation speed of the fan control module that just can judge this part, or the rotation speed of the fan testing circuit is out of joint, thereby sends warning.If after adjusting rotation speed of the fan, detected corresponding rotation speed of the fan has been made correct variation, but the temperature detection value of correspondence does not change with it, so just might be that fault has appearred in the monitoring temperature module; Can make a comprehensive judgement according to various situations, the strategy of making adjustment again perhaps produces alerting signal.
A kind of method of interrupting realizing the control of system fan rotating speed by SMI of the present invention except the described technical characterictic of instructions, is the known technology of those skilled in the art.
Claims (4)
1. method that interrupt to realize the control of system fan rotating speed by SMI is characterized in that step is:
(1), in the process of BIOS opening initialization, the register of South Bridge chip group is configured, allow the South Bridge chip group intermittently produce the SMI look-at-me and give CPU;
(2), CPU enters the SMM pattern after receiving the SMI look-at-me, system's control is transferred among the SMI handler of BIOS;
(3), in the SMI of BIOS Handler, add the code that cpu temperature detects, add the code that environment temperature detects, add the code that rotation speed of the fan detects;
(4), the SMI Handler of BIOS control rotation speed of the fan.
2. a kind of method of interrupting realizing the control of system fan rotating speed by SMI according to claim 1 is characterized in that the monitoring temperature module is connected to the SMI handler of South Bridge chip group and BIOS; The SMI handler of South Bridge chip group and BIOS is connected to fan control module; Fan control module is connected to the SMI handler of BIOS.
3. a kind of method of interrupting realizing the control of system fan rotating speed by SMI according to claim 2 is characterized in that the monitoring temperature module is connected to the South Bridge chip group by lpc bus or I2C bus; The South Bridge chip group is connected to fan control module by lpc bus or I2C bus.
4. a kind of method that interrupt to realize the control of system fan rotating speed by SMI according to claim 1 and 2 is characterized in that step is:
(1), by to the configuration of South Bridge chip group related register, allow the South Bridge chip group can intermittently produce the SMI look-at-me and give CPU;
(2), will be in the time interval of setting after the BIOS start, system's control is transferred among the SMI handler of BIOS;
(3), in the SMI of BIOS Handler, add the code that code that cpu temperature detects and environment temperature detect, obtain cpu temperature and environment temperature situation; Add the code that rotation speed of the fan detects, can obtain the real-time rotating speed of cpu fan, system fan;
(4), the SMI Handler of BIOS is by the real-time rotating speed to cpu temperature and environment temperature and cpu fan, system fan, makes judgement, controls the rotating speed of cpu fan or system fan, and the amplitude adjusted of rotation speed of the fan.
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| CN2013102014907A CN103345425A (en) | 2013-05-28 | 2013-05-28 | Method for achieving control over rotation speed of system fan through SMI interruption |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN104636221A (en) * | 2013-11-12 | 2015-05-20 | 研祥智能科技股份有限公司 | Method and device for processing computer system fault |
| CN105183506A (en) * | 2015-08-17 | 2015-12-23 | 山东超越数控电子有限公司 | Method for solving power-down resetting of PCI (Programmable Communications Interface) device register during wake-up from S3 |
| CN105736433A (en) * | 2014-12-10 | 2016-07-06 | 中国长城计算机深圳股份有限公司 | Fan control method and device and terminal |
| CN107145359A (en) * | 2017-05-12 | 2017-09-08 | 郑州云海信息技术有限公司 | A kind of BMC changes the optimization method of BIOS option |
| CN108874632A (en) * | 2017-05-11 | 2018-11-23 | 精英电脑股份有限公司 | The alarming method for power of computer system errors |
| CN109828882A (en) * | 2017-11-23 | 2019-05-31 | 研祥智能科技股份有限公司 | Cpu temperature and system ambient temperature monitoring device |
| CN111381643A (en) * | 2018-12-28 | 2020-07-07 | 技嘉科技股份有限公司 | Component power consumption switching circuit and mainboard thereof |
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| CN111381643A (en) * | 2018-12-28 | 2020-07-07 | 技嘉科技股份有限公司 | Component power consumption switching circuit and mainboard thereof |
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