Method for deciding blocking signal

Abstract

When a system management interrupt (SMI) signal is sent to CPU, the disclosed method determines whether it is needed to obstruct a reply signal to be transferred to CPU. The said reply signal is a signal from a system chip to respond the driving signal sent from CPU to the system chip. The method detects whether CPU has sent a driving signal to the system chip, and detects whether there is a SMI signal sent to CPU. After CPU sends driving signal to system chip, if there is followed SMI signal sent to CPU, the method determines that the SMI signal is in use for picking up value of temporary storage of computer system so that the reply signal to be transferred to CPU is obstructed.

Description

technical field [0001] The present invention relates to a method for determining a blocking signal, in particular to a method for determining whether to block a reply signal from being transmitted to a central processing unit when a system management interrupt signal is sent to the central processing unit. Background technique [0002] Nowadays, computer technology is getting more and more advanced, and there are more and more peripheral devices connected to the computer. Therefore, the complexity of the computer system is increasing, which leads to the need for more complicated system debugging in order to improve the stability of the computer system and avoid When a computer system is in use, system abnormalities occur. With the advancement of system debugging technology, it is now developed that inspectors trigger system management interrupts (System Management interrupt, SMI) through software (software is software, hereinafter referred to as software). The signal drives ...

AI Technical Summary

Problems solved by technology

[0003] When the central processing unit is executing the system management mode and has not finished retrieving the data of the temporary register, if a reply signal is transmitted to the central processing unit, for example, the south bridge chip transmits the reply signal, because the reply signal is for the system chip to restore the central processing The unit has completed the execution event that the central processing unit sends a driving signal, so the central processing unit will change the data of the register of the computer system, which may cause the data of the acquired register to be changed by the central processing unit The data, not the data required by the inspectors, will hinder the inspectors from debugging the computer system. Therefore, when the central processing unit receives the system management interrupt signal and enters the system management mode, it must block the reply signal from being transmitted to the central processing unit until the retrieval is completed. Get data from scratchpad

[0004] In addition, because the system management interrupt signal can also be triggered by peripheral devices, the system management interrupt signal is not used to retrieve the data of the register, so there is no need to block the reply signal from being transmitted to the central processing unit, so the method of blocking the reply signal is decided now , is to detect the status register of all peripheral devices of the computer system, to confirm whether the system management interrupt signal is triggered by the peripheral device, if not, it means that the system management interrupt signal is triggered by software, so it is necessary to block the reply signal from being transmitted to The central processing unit, but the above-mentioned process of confirming the status register one by one is quite time-consuming and consumes computer system hardware (hardware is hardware, hereinafter all referred to as hardware) resources and costs. In addition, there are currently other methods of blocking reply signals The method is to directly block the reply signal without worrying that the system management interrupt signal is triggered by peripheral devices or software, so that the computer system will easily cause problems

[0005] It can be seen that the above-mentioned existing method for determining the blocking signal obviously still has inconvenience and defects in method and use, and needs to be further improved urgently.

In order to solve the problems existing in the method of determining the blocking signal, the relevant manufacturers have tried their best to find a solution, but no suitable design has been developed for a long time, and there is no suitable method for general products to solve the above problems. This is obviously a problem that relevant industry players are eager to solve

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