TWI459291B - System and method for updating uefi setup information of a computer - Google Patents

Description

Computer interface information configuration system and method

The present invention relates to a computer interface information configuration modification system and method, and more particularly to a system and method for updating a computer interface information configuration under a UEFI (Unified Extensible Firmware Interface) platform.

On the BIOS (Basic Input Output System) platform, computer interface information configuration materials, such as boot device list and sequence, are basically CMOS (Complementary Metal Oxide Semiconductor), which is stored on the South Bridge. ) in the wafer. The data in the CMOS chip can be modified in addition to the configuration at boot time. The I/O interface configuration data can also be modified by the operating system (OS) by driving the I/O port (for example, 70/71埠). With the development of computer technology, the traditional BIOS has been gradually replaced by UEFI (Unified Extensible Firmware Interface), which is an interface standard between Intel's latest computer operating system and platform firmware.

Due to the difference in UEFI and BIOS design structure, it is difficult for the traditional BIOS to modify the interface configuration data by driving the I/O port. The reason is that the interface configuration data and the hardware configuration data in the UEFI platform are stored in the CMOS chip, and the software configuration data such as the boot device list and the configuration sequence are stored in the FLASH chip. Usually, by the South Bridge The SPI (Serial Peripheral Interface) controller reads and writes FLASH to modify the interface configuration data in the FLASH chip. However, this modification has the following disadvantages: First, the control of different south bridge chips for the SPI controller The registers are not the same, they are not universal; the second is that if the computer is running in protected mode, for example, the computer interface configuration data is encrypted or compressed, it is difficult for the user to modify the I/O interface by the traditional BIOS modification method. The configuration data is modified.

In view of the above information, it is necessary to provide a computer interface information configuration system and method, which can directly modify the computer interface configuration information in the FLASH chip under the UEFI platform.

The computer interface information configuration system is installed and runs under a computer operating system, and the computer includes an SMRAM storage unit, a UEFI storage unit, and a FLASH chip. The computer interface information configuration system includes a function creation module, a function calling module and an information configuration module. The function creation module is configured to create an SMI function under the UEFI platform, and store the SMI function in the SMRAM storage unit. The function calling module is configured to generate an entry address of an SMI function and store the entry address of the SMI function in the SMI table, and when the user writes the SMI function entry by the I/O in the operating system In the address, the SMI function is searched in the SMI table as the SMI control code for triggering the SMI function, and the SMI control code is used to trigger the SMI function in the SMRAM storage unit, and the UEFI storage unit is called by the SMI function. Run the service function inside. The information configuration module is configured to execute a running service function on the UEFI platform to read and write computer interface configuration information stored in the FLASH chip.

The computer interface information configuration method can modify the I/O interface configuration information of the computer under the UEFI platform. The method includes the steps of: creating an SMI function under the UEFI platform, and storing the SMI function in the SMRAM storage unit; generating an SMI The entry address of the function and the entry address of the SMI function are stored in the SMI table; when the user writes the entry address of the SMI function by I/O in the operating system, the SMI function is found in the SMI table. The entry address is used as an SMI control code for triggering the SMI function; the SMI function is triggered by the SMI control code; the running service function in the UEFI storage unit is invoked by the SMI function; and the running service is executed under the UEFI platform. Function to read and write the computer interface configuration information stored in the FLASH chip.

Compared with the prior art, the computer interface information configuration system and method of the present invention, when the computer is running in the protection mode, the operating system cannot directly call the execution process of the Runtime Services function, and the user is under the operating system. The interface configuration information stored in the CMOS chip can be changed by driving the I/O, and the interface configuration information stored in the FLASH chip can be changed to achieve the purpose of modifying the computer interface configuration information under the UEFI platform.

10‧‧‧Operating system

11‧‧‧Computer Interface Information Configuration System

110‧‧‧Function creation module

111‧‧‧ function calling module

112‧‧‧Information Configuration Module

20‧‧‧SMRAM storage unit

30‧‧‧UEFI storage unit

40‧‧‧FLASH chip

50‧‧‧CMOS chip

1 is a block diagram of a preferred embodiment of a computer interface information configuration system of the present invention.

Figure 2 is a schematic diagram of the running service function under the UEFI platform.

3 is a flow chart of a preferred embodiment of a computer interface information configuration method according to the present invention.

As shown in FIG. 1, it is an architectural diagram of a preferred embodiment of the computer interface information configuration system 11 of the present invention. In this embodiment, the computer interface information configuration system 11 (hereinafter referred to as the information configuration system 11) is installed and runs under the operating system of the computer, and is used under the UEFI (Unified Extensible Firmware Interface) platform. Modify the I/O interface configuration information of the computer. The computer includes an operating system (OS) 10, an SMRAM storage unit 20, a UEFI storage unit 30, a FLASH wafer 40, and a CMOS wafer 50. The UEFI platform is the latest in Intel Corporation. The interface standard between the computer operating system and the computer hardware interface. Under the UEFI platform, the configuration information of the computer hardware device is generally stored in the CMOS chip 50, and the software configuration data such as the boot device list and the configuration sequence are stored in the FLASH wafer 40.

The SMRAM storage unit 20 is configured to store an SMI (System Management Interrupt) function that is available to the operating system 10 for processing different computer interface configuration information. The UEFI storage unit 30 is configured to store a plurality of Runtime Services functions that are available for SMI function calls. Under the UEFI platform, it includes a Boot Services function and a Runtime Services function. When the computer runs the operating system 10, the Runtime Services function waits until the operating system 10 calls until the computer is shut down.

The information configuration system 11 includes a function creation module 110, a function calling module 111, and an information configuration module 112. The function creation module 110 is configured to create an SMI function under the UEFI platform and store the SMI function in the SMRAM storage unit 20. In this embodiment, when the computer needs to process an interrupt event in the SMM (System Management Mode) (for example, the user needs to configure the computer I/O information), the function creation module 110 is created under the UEFI platform. The corresponding SMI function handles the interrupt event.

The function calling module 111 is configured to generate an entry address (Index) of an SMI function, for example, an Index value of “0xde”, and store the entry address of the SMI function in the SMI table, and when the user is in the OS. When the SMI function is triggered by writing the Index value by I/O, the SMI function is used to find the SMI function's entry address as the SMI control code (Handler) that triggers the SMI function. The SMI control code is the SMRAM storage unit 20 The entry address of the inner SMI function, for example, the first address SMBase+8000H is used as the entry address of the SMI function.

The function calling module 111 is further configured to trigger an SMI function stored in the SMRAM storage unit 20 by the SMI control code, and invoke a Runtime Services function (running a service function) in the UEFI storage unit 30 by using the SMI function. . In this embodiment, the function calling module 111 searches the interface of the Runtime Services function in the background of the computer system by using the SMI control code, and triggers the SMI function by triggering the outpd (0xb2, 0xde) as follows. "0xb2" is the SMI nickname specified on the Intel processor platform, and "0xde" is the index value written by the user through the operating system (OS) 10. When an SMI is triggered, the function call module 111 switches to the SMRAM storage unit 20 to call the SMI function. When the computer executes the SMM mode, the function calling module 111 executes the SMI control code to complete the corresponding operation. When the SMI function performs the invocation operation, the operating system 10 executes a recovery instruction (RSM) to return the computer system to the previously switched SMM mode.

The information configuration module 112 is configured to execute a Runtime Services function to read and write computer interface configuration information of the FLASH wafer 40, so that the computer interface configuration information stored in the FLASH wafer 40 can be modified under the UEFI platform. Referring to FIG. 2, the Runtime Services function generally includes a GetVariable function, a GetNextVariableName function, a SetVariable function, and a QueryVariableInfo function. Therefore, the user can modify the computer interface configuration information in the FLASH wafer 40 by using different interface parameters of the RuntimeServices function.

FIG. 3 is a flow chart of a preferred embodiment of a computer interface information configuration method according to the present invention. Step S31, the function creation module 110 creates an SMI function under the UEFI platform. The number is stored in the SMRAM storage unit 20. In this embodiment, the computer system runs in the SMM mode as an example. When the computer system needs to handle an interrupt event (for example, the user needs to configure computer I/O information), the function creation module 110 creates a corresponding one under the UEFI platform. SMI functions to handle interrupt events.

In step S32, the function calling module 111 generates an entry address (Index) of an SMI function, for example, an Index value of "0xde", and stores the entry address of the SMI function in the SMI table. Step S33, when the user triggers the SMI function by writing the Index value by I/O under the OS, the function calling module 111 searches the entry address of the SMI function by using the SMI table as the SMI control code (Handler) that triggers the SMI function. . The SMI control code is the entry address of the SMI function in the SMRAM storage unit 20, for example, the first address SMBase+8000H is used as the entry address of the SMI function.

In step S34, the function calling module 111 triggers the SMI function stored in the SMRAM storage unit 20 by the SMI control code. In this embodiment, the function calling module 111 searches for the Runtime Services function interface in the background of the computer system by using the SMI control code, and triggers the SMI function by triggering the outpd (0xb2, 0xde) as follows: “0xb2 "The SMI nickname specified on the Intel processor platform, "0xde" is the index value written by the user through the operating system (OS) 10.

In step S35, the function calling module 111 calls the Runtime Services function in the UEFI storage unit 30 by the SMI function. When an SMI is triggered, the function call module 111 switches to the SMRAM storage unit 20 to call the SMI function. When the computer executes the SMM mode, the function calling module 111 executes the SMI control code to complete the corresponding operation. When the SMI function performs the invocation operation, the operating system 10 executes a recovery instruction (RSM) to return the computer system to the previously switched SMM mode.

In step S36, the information configuration module 112 executes the Runtime Services function to read and write. The I/O interface configuration data of the FLASH wafer 40 enables the computer interface configuration information stored in the FLASH wafer 40 to be modified under the UEFI platform.

In addition, when the operating system 10 is operating in the protection mode, and the operating system 10 cannot directly call the execution process of the Runtime Services function, the user can be partially present in the CMOS wafer 50 by driving the I/O change under the operating system 10. The interface configuration information can also be used to modify the interface configuration information existing in the FLASH chip 40 by using the computer interface information configuration system and method, thereby completely modifying the computer interface configuration information under the UEFI platform.

The above is only the preferred embodiment of the present invention, and has been used in a wide range of applications. Any other equivalent changes or modifications that are not departing from the spirit of the present invention should be included in the following patent application. Within the scope.

10‧‧‧Operating system

11‧‧‧Computer Interface Information Configuration System

110‧‧‧Function creation module

111‧‧‧ function calling module

112‧‧‧Information Configuration Module

20‧‧‧SMRAM storage unit

30‧‧‧UEFI storage unit

40‧‧‧FLASH chip

50‧‧‧CMOS chip

Claims (6)

A computer interface information configuration system is installed and operated under a computer operating system, which includes an SMRAM storage unit, a Unified Extensible Firmware Interface (UEFI) storage unit, and a FLASH chip. The computer interface information configuration system includes: a function creation module. For creating an SMI function under the UEFI platform, and storing the SMI function in the SMRAM storage unit; the function calling module is configured to generate an entry address of the SMI function and store the entry address in the SMI table, When the user writes the entry address of the SMI function by I/O in the operating system, the entry address of the SMI function is searched in the SMI table as the SMI control code that triggers the SMI function, and the SMRAM is triggered by the SMI control code. The SMI function in the storage unit, and the running service function in the UEFI storage unit is invoked by the SMI function; and the information configuration module is configured to execute the running service function on the UEFI platform to read and write the computer interface stored in the FLASH chip. Configuration information. The computer interface information configuration system according to claim 1, wherein the UEFI platform is an interface standard between a computer operating system and a computer hardware interface. The computer interface information configuration system of claim 1, wherein the running service function comprises a GetVariable function, a GetNextVariableName function, a SetVariable function, and a QueryVariableInfo function. A computer interface information configuration method for modifying a computer I/O interface configuration information under a UEFI platform, the computer comprising an SMRAM storage unit, a UEFI storage unit and a FLASH chip, the method comprising the steps of: creating an SMI function under the UEFI platform And storing the SMI function in the SMRAM storage unit; Generate an entry address of the SMI function and store the entry address in the SMI table; when the user writes the entry address of the SMI function by I/O in the operating system, look up the SMI function in the SMI table. The entry address is used as an SMI control code for triggering the SMI function; the SMI function in the SMRAM storage unit is triggered by the SMI control code; the running service function in the UEFI storage unit is invoked by the SMI function; and the running service function is executed under the UEFI platform. To read and write computer interface configuration information stored in the FLASH chip. The computer interface information configuration method according to claim 4, wherein the UEFI platform is an interface standard between a computer operating system and a computer hardware interface. The computer interface information configuration method according to claim 4, wherein the running service function comprises a GetVariable function, a GetNextVariableName function, a SetVariable function, and a QueryVariableInfo function.