CN100501679C - Electric device - Google Patents

Abstract

The invention discloses an electronic device, which includes a central processing unit, a memory, a switch unit, and a basic input and output system BIOS switching unit, wherein: the memory is provided with two BIOS program storage areas; the BIOS switching unit is used in the electronic device When the electronic device is powered on or the electronic device is reset, the electronic device is triggered to switch from one BIOS program storage area in the memory to booting the electronic device from another BIOS program storage area; the switch unit is used to power on the electronic device or the electronic device When resetting, disconnect the partition address line from the central processing unit to the memory, and turn on the partition address line after the electronic device is successfully started. The invention also discloses a starting method and a BIOS upgrading method at the same time. By using the invention, no matter whether the BIOS upgrade is successful or failed, the electronic equipment can be started normally, thereby ensuring the safety of the BIOS upgrade.

Description

an electronic device

technical field

The invention relates to the field of electronic technology, in particular to an electronic device.

Background technique

The full name of BIOS (Basic Input/Output System, Basic Input Output System) is ROM-BIOS, which is the abbreviation of the basic input/output system of the read-only memory. It is the most direct hardware control program at the level. It is the hub connecting software programs and hardware devices. In layman's terms, BIOS is a "converter" or an interface between hardware and software programs (although it itself is only A program) is responsible for solving the immediate requirements of the hardware, and executes according to the operation requirements of the software for the hardware.

At present, the BIOS chip of the computer basically uses Flash ROM (flash memory), and the BIOS can be upgraded through a specific writing program. There are two main purposes for upgrading the BIOS:

1. Get new features.

The most direct benefit of upgrading the BIOS is that you can get many new functions, such as the ability to support new frequencies and new types of CPUs. For example, some old motherboards support Tualatin core Pentium III and Celeron by upgrading the BIOS, and some motherboards now support BIOS can support the latest Prescott core Pentium4E CPU; break through the capacity limit, and can directly use large-capacity hard drives; obtain a new boot method; enable previously blocked functions, such as Intel's hyper-threading technology, VIA's memory interleaving technology, etc.; identify other new hardware etc.

2. Solve the vulnerability BUG in the old version of BIOS.

Since the BIOS is also a program, there must be bugs, and the development of hardware technology is changing with each passing day. With the intensification of market competition, the cycle for motherboard manufacturers to launch products is getting shorter and shorter. There must be some unsatisfactory places in BIOS writing. These bugs often lead to inexplicable failures, such as restarting for no reason, frequent crashes, low system performance, device conflicts, hardware devices "lost" for no reason, and so on.

In the prior art, the BIOS upgrade mode is implemented by directly covering the original BIOS program in the Flash ROM. In this way, if there is an abnormality in the BIOS upgrade process (such as abnormal file transfer, abnormal FLASH read and write, power failure during the upgrade process), and the BIOS boot program used for the upgrade itself has defects, electronic devices such as computers and communications will not be able to start.

Contents of the invention

In view of this, the main purpose of the embodiments of the present invention is to provide an electronic device, a startup method, and a BIOS upgrade method, so as to ensure that the device system can still be safely and normally started when an abnormality occurs during the BIOS upgrade process and the upgrade fails.

In order to achieve the purpose of the method, an embodiment of the present invention provides a startup method, including:

A. When the device is powered on, use the BIOS program storage area of the first basic input and output system to boot the device. If the startup fails or the device is powered on again, perform step B;

B. The hardware logic circuit triggers the device to switch from the first BIOS program storage area to the second BIOS program storage area, and boots the device with the second BIOS program storage area.

In addition, the embodiment of the present invention also provides a basic input output system BIOS upgrade method, comprising steps:

Two BIOS program storage areas are set, and the BIOS program storage area is used to store the BIOS program started by the boot device. When the device is upgraded to BIOS, the steps are as follows:

a. Power on the device, boot the device with the first BIOS program storage area, and after the device starts successfully, load the BIOS program for upgrading to the second BIOS program storage area;

b. The device is powered on again, and the hardware logic circuit triggers the device to switch from the first BIOS program storage area to the second BIOS program storage area, and boots the device with the second BIOS program storage area. If the startup is unsuccessful, Then the hardware logic circuit triggers the device to switch from the second BIOS program storage area to the first BIOS program storage area, and boots the device with the first BIOS program storage area again;

c, judging whether the BIOS program storage area successfully started by the current boot device is the second BIOS program storage area, if yes, loading the BIOS program in the second BIOS program storage area to the first BIOS program storage district.

Correspondingly, an embodiment of the present invention also provides an electronic device, including a central processing unit, a memory, a switching unit, and a basic input and output system BIOS switching unit, wherein:

The memory is provided with two BIOS program storage areas, and the BIOS storage area stores a BIOS program for booting the device;

A BIOS switching unit, configured to trigger the device to switch from one BIOS program storage area in the memory to booting the device from another BIOS program storage area when the device is powered on or the device is reset;

The switch unit is used for disconnecting the partition address line from the central processing unit to the memory when the device is turned on or reset, and for turning on the partition address line after the device is successfully started.

In the BIOS upgrade method of the embodiment of the present invention, by setting two BIOS program storage areas, when the device is running normally, the BIOS program for upgrading is loaded into the second BIOS outside the first BIOS program storage area currently used to boot the device. Program storage area, when the device is powered on again, the hardware logic circuit triggers the device to jump to the second BIOS program storage area to boot the device, if the boot is unsuccessful, the hardware logic circuit triggers the device to jump to the following The first BIOS program storage area that has the original BIOS program is stored to boot the device, thereby avoiding the upgrade failure during the upgrade process, such as failure caused by an abnormality in the BIOS upgrade program or a defect in the BIOS program used for upgrade itself, which is harmful to the device. The potential risks generated ensure that the device can start normally regardless of whether the BIOS upgrade succeeds or fails, and improves the security of the BIOS upgrade.

Description of drawings

FIG. 1 is a schematic diagram of the composition of an electronic device according to an embodiment of the present invention;

Fig. 2 is a schematic flow chart of a starting method of an embodiment of the present invention;

Fig. 3 is a schematic flow chart of a BIOS program loading method in a BIOS upgrading method according to an embodiment of the present invention;

FIG. 4 is a schematic flowchart of a BIOS booting and starting method in a BIOS upgrading method according to an embodiment of the present invention.

Detailed ways

In order to make the technical solutions and advantages of the embodiments of the present invention clearer, the embodiments of the present invention will be further described in detail below with reference to the accompanying drawings and examples.

Referring to FIG. 1 , it is a schematic diagram of the composition of an electronic device according to an embodiment of the present invention. The electronic equipment described in the embodiments of the present invention includes not only general-purpose computer systems such as personal computers, but also communication electronic equipment using special-purpose computer systems such as embedded computer systems, such as network access equipment, communication switching equipment, and the like. As shown in the figure, the electronic device described in the embodiment of the present invention mainly includes a central processing unit 1 , a memory 2 , a switch unit 3 , a switch unit 4 and an upgrade control subsystem 5 . Each component is described in detail below.

The central processing unit 1 implements operations such as address access and data reading to the memory 2 through an address bus and a data bus, which are the same as those in the prior art, and will not be repeated here.

The memory 2 is provided with a BIOS program storage area A and a BIOS program storage area B, and the BIOS program storage area A and the BIOS program storage area B are both used to store the BIOS program for booting the device.

Here, during specific implementation, the memory 2 is a non-lost memory when power-off, generally EPROM (Electrically Erasable Programmable ROM, electrically erasable programmable ROM) or FLASH ROM (flash memory), in order to simplify the design, generally , setting the BIOS program storage area A and the BIOS program storage area B sequentially from the lowest bit of the memory 2, for example, when the preset maximum space of the BIOS program storage area is 512K, the partition of the BIOS program storage area A The address range is 0x0 to 0x03FFFF, and the partition address range of the BIOS program storage area B is 0x040000 to 0x07FFFF. At this time, corresponding to the BIOS program storage area A, the output of the address bus A18 of the central processing unit 1 is 0 , corresponding to the BIOS program storage area B, the output of the address bus A18 of the central processing unit 1 is 1. In addition, during specific implementation, the partition address allocation of the BIOS program storage area A and the BIOS program storage area B can be more flexible. For example, the partition address range of the BIOS program storage area A can be set to 0x0 to 0x7FFFF, the partition address range of the BIOS program storage area B is 0x080000 to 0xFFFFF, at this time, corresponding to the BIOS program storage area A, the output of the address bus A19 of the central processing unit 1 is 0, corresponding to the In the BIOS program storage area B, the output of the address bus A19 of the CPU 1 is 1.

The BIOS switching unit 4 is configured to trigger the device to switch from one BIOS program storage area in the memory 2 to booting the device from another BIOS program storage area when the device is powered on or the device is reset.

The switch unit 3 is used to disconnect the partition address line from the central processing unit 1 to the memory 2 when the device is turned on or reset, and is used to turn on the partition address line after the device is successfully started . The switching unit 4 and the switching unit 3 will be described in detail below.

The BIOS switching unit 4 has a first output pin and a second output pin. When the device is powered on and reset or the device is reset (for example, the device starts overtime, and the hardware watchdog circuit resets the device), the first output pin The output state of the pin is the output state of the enable signal, and the enable signal is used to control the switch unit 3 to disconnect the partition address line from the central processing unit 1 to the memory 2; after the device is successfully started, the The output state of the first output pin is the output state of the prohibition enable signal, and the prohibition enable signal is used to control the switch unit 3 to turn on the partition address lines from the central processing unit 1 to the memory 2; The output state of the second output pin includes two address output states corresponding to the respective BIOS program storage areas. When the device is powered on or reset, the output state of the second output pin is triggered by the One of the two address output states switches to the other address output state.

The partition address line is one of multiple data buses between the central processing unit 1 and the memory 2, and the logic output state (0 or 1) of the partition address line can determine the central processing unit 1 The partition address range to read from the memory 2. For example, when the preset maximum space of the BIOS program storage area is 512K, the partition address range of the BIOS program storage area A is 0x0 to 0x03FFFF, and the partition address range of the BIOS program storage area B is 0x040000 to 0x07FFFF. At this time, the corresponding In the BIOS program storage area A, the output of the address bus A18 of the central processing unit is 0, corresponding to the BIOS program storage area B, the output of the address bus A18 of the central processing unit 1 is 1, and the output of the address bus A18 of the central processing unit 1 is 1. The address bus A18 is the partition address line.

The BIOS program storage area A and the BIOS program storage area B in the memory 2 in the electronic device according to the embodiment of the present invention are set sequentially from the lowest bit of the memory 2, and the preset of the BIOS program storage area Assuming that the maximum space is 512K, the switching unit 4, the switching unit 3, and the memory 2 will be further described in detail. In a specific embodiment, the switch unit 4 is a programmable hardware logic circuit, such as CPLD (complex programmable logic devices, complex programmable logic devices), and the switch unit 3 is a hardware logic circuit, such as a 244 logic drive circuit, which The main function is equivalent to a controllable switch circuit, that is, the conduction state of its input and output terminals is controlled by the input state of the enabling terminal, and the first output pin of the switching unit 4 is connected to the enabling terminal of the switching unit 3 connect. When the central processing unit 2 reads the BIOS program storage area A (that is, the storage partition whose address range is 0x0 to 0x3FFFF in the memory 2), the output of the address bus A18 of the central processing unit 1 is 0, When the central processing unit 2 reads the BIOS program storage area B (that is, the storage partition whose address range is 0x040000 to 0x07FFFF in the memory 2), the output of the address bus A18 of the central processing unit 1 is 1, In the embodiment of the present invention, during the time period from when the device is powered on to when it is successfully started, the first output pin of the switching unit 4 outputs an enabling signal to control the switching unit 3 to disconnect the central processing unit 1 to The address bus A18 of the memory 2 (when the enable end of the switch unit is turned on at a low level and turned off at a high level, the enable signal is a high level signal), the switch unit 4 The second pin includes two address output states, and the second pin is connected to the input end of the address bus A18 in the memory 2 . When the output of the second pin is 0, the central processing unit 1 reads the BIOS program for booting the system from the BIOS program storage area A in the memory 2; when the output of the second pin When it is 1, the CPU 1 reads the BIOS program for booting the system from the BIOS program storage area B in the memory 2 . When the device is powered on and reset or the device is reset (the watchdog circuit sends a reset signal), the address output state of the second output pin of the switching unit 4 is triggered to switch between 0 and 1, because the The switching unit 4 is a programmable hardware logic circuit, such as CPLD (complex programmable logic devices, complex programmable logic devices), and the cycle switching of its own state does not need software control. When the BIOS program storage area A and the BIOS program storage area When one of B is unavailable (such as virus infection, upgrade failure, etc. may cause the corresponding BIOS program storage area to fail to boot the system successfully), the switching of the address output state of the second pin of the switching unit 4 is triggered by hardware reset , thereby jumping to another BIOS program storage area to boot the system. In the embodiment of the present invention, after the device is successfully started, in order to ensure that the address bus of the CPU is not disturbed when the device is running normally, the central processing unit 1 controls the first pin of the switching unit 4 by executing a software program The output state of the output state is the output state of the prohibition enable signal, and the switch unit 3 is controlled by the prohibition enable signal to conduct the address bus A18 from the central processing unit 1 to the memory (when the enable terminal of the switch unit is low-level conduction, and when high-level is disconnected, the prohibition enabling signal is a low-level signal), correspondingly, the central processing unit 1 controls the output state of the second pin to be high by executing a software program resistance state.

In a specific embodiment, the switching unit 4 includes a boot area flag register, which is used to save the output state of the second pin of the switching unit for providing software to identify the current boot area.

Upgrade control subsystem 5, the upgrade control subsystem 5 described in the embodiment of the present invention mainly includes:

The first loading unit 51 is configured to load the BIOS program used for upgrading to another BIOS program storage area other than the BIOS program storage area activated by the current boot device when performing BIOS upgrade on the device.

Here, when the BIOS program storage area that the current boot device starts is the BIOS program storage area A, the BIOS program for upgrading is loaded into the BIOS program storage area B; when the BIOS program storage area that the current boot device starts is the BIOS program storage area When area B is selected, the BIOS program used for upgrading is loaded into BIOS program storage area A. The BIOS program used for upgrading may be a BIOS program file that is detected and downloaded for online network upgrade. For the convenience of description, the subsequent description will use the BIOS update area to represent the BIOS program storage area where the new BIOS update program is loaded.

The judging unit 52, after the device restarts successfully, judges whether the BIOS program storage area used to boot the device when restarting is the other BIOS program storage area and generates a corresponding judgment result.

Here, when the device restarts and powers on and resets, the address output state of the second output pin of the switching unit 4 jumps, for example, assuming that the current BIOS boot area of the device before the device is restarted and powered on is the BIOS program storage area A (at this time, the BIOS update area is the BIOS program storage area B), the output of the corresponding second output pin of the switching unit 4 is 0, and when the device is powered on and reset, trigger The output of the second output pin of the switching unit 4 jumps to 1, which realizes that the central processing unit 1 reads the BIOS program from the BIOS program storage area B to boot the device.

The second loading unit 53 is used to load the BIOS program in the BIOS program storage area used for boot device startup to the BIOS program storage area outside the BIOS program storage area when the judging result of the judging unit is yes. Another BIOS program storage area.

The upgrade result output unit 54 is configured to output a prompt message of BIOS upgrade success when the judgment result of the judgment unit is Yes, and output a prompt message of unsuccessful BIOS upgrade when the judgment result of the judgment unit is No.

Referring to FIG. 2 , it is a schematic flow chart of a startup method according to an embodiment of the present invention. As shown in the figure, the starting method described in the embodiment of the present invention mainly includes the following steps:

Step s201, setting two BIOS program storage areas.

Here, the BIOS program storage area is used to store the BIOS program started by the boot device. In general, the two BIOS program storage areas are set in the same non-losable memory upon power failure, such as EPROM (Electrically Erasable Programmable ROM, Electrically Erasable Programmable ROM) or FLASH ROM (flash memory). Generally, the two BIOS program storage areas are set sequentially starting from the lowest bit of the non-lost memory. For example, when the preset maximum space of the BIOS program storage area is 512K, for the convenience of description, the two The two BIOS program storage areas are named BIOS program storage area A and BIOS program storage area B, the partition address range of the BIOS program storage area A is 0x0 to 0x03FFFF, and the partition address range of the BIOS program storage area B is 0x040000 to 0x07FFFF , at this time, corresponding to the BIOS program storage area A, the output of the address bus A18 of the device CPU is 0, and corresponding to the BIOS program storage area B, the output of the address bus A18 of the device CPU is 1. In addition, during specific implementation, the partition address allocation of the BIOS program storage area A and the BIOS program storage area B can be more flexible. For example, the partition address range of the BIOS program storage area A can be set to 0x0 to 0x7FFFF, the partition address range of the BIOS program storage area B is 0x080000 to 0xFFFFF, at this time, corresponding to the BIOS program storage area A, the output of the address bus A19 of the device CPU is 0, corresponding to the BIOS program storage area B, the output of the address bus A19 of the device CPU is 1.

Step s202, when the device is powered on, boot the device with the first BIOS program storage area to start.

Here, when the device is powered on, the hardware logic circuit controls the CPU of the device to start from one of the two BIOS program storage areas.

Step s203, if the startup is unsuccessful or the device is powered on again, boot the device with the second BIOS program storage area.

Here, during specific implementation, the hardware logic circuit triggers the device to jump from the first BIOS program storage area to booting the device with the second BIOS program storage area.

Step s204, after the device is successfully started, load the BIOS program in the second BIOS program storage area to the first BIOS program storage area.

Here, one of the two BIOS program storage areas described in the embodiment of the present invention may be unavailable due to upgrade failure, virus infection, etc. (that is, the device cannot be booted normally). In step s202, the first BIOS program storage area cannot boot the device successfully, and when the startup timeout occurs, the watchdog hardware circuit will send a reset signal, and the device is triggered from the first BIOS program storage by controlling the address output state of the hardware logic circuit. The area is switched to the second BIOS program storage area, and the boot device is started with the second BIOS program storage area (the reset signal of the watchdog circuit triggers the address output state of the hardware logic circuit to switch between 0 and 1), the embodiment of the present invention The switching of the address output state of the hardware logic circuit does not need to be controlled by executing software, so as to ensure that the device can be switched to the corresponding available BIOS program storage area to boot the device before the device is successfully started (the device cannot be executed before starting) software). After the device is successfully started from the second BIOS program storage area, copy and load the BIOS program in the second BIOS program storage area to the first BIOS program storage area, thereby ensuring that the device uses the two BIOS programs Any boot device in the storage area starts.

On the basis of the starting method described in the embodiment of the present invention, the embodiment of the present invention also provides a BIOS upgrade method.

Referring to FIG. 3 , it is a schematic flowchart of a BIOS program loading method in the BIOS upgrading method according to an embodiment of the present invention. As shown in the figure, the BIOS program loading method mainly includes the following steps:

Step s301, setting two BIOS program storage areas.

Here, the setting methods and functions of the two BIOS program storage areas are the same as those in step s201, and will not be repeated here.

Step s302, when the device is powered on, boot the device with the first BIOS program storage area to start.

Here, the first BIOS program storage area is the current startup boot area of the device, that is, after the device is powered on, under the jump control of the hardware logic circuit, the device CPU reads the BIOS program boot area from the BIOS program storage area. The device starts up. When the embodiment of the present invention is implemented, the hardware logic provides a boot area flag register for storing the current boot area flag of the device. During specific implementation, for example, the address output state of the hardware logic corresponding to the BIOS program storage area A is 0 (corresponding The address of the corresponding partition of the BIOS program storage area B is 0x0 to 0x03FFFF), and the address output state of the hardware logic corresponding to the BIOS program storage area is 1 (the address of the corresponding memory partition is 0x040000 to 0x07FFFF). The address of the output state is saved (0 or 1). By reading the address output state in the boot area flag register, the current boot boot area of the device can be distinguished from another BIOS program storage area.

In step s303, after the device is started successfully, the BIOS program for upgrading is loaded into the second BIOS program storage area.

Here, the second BIOS storage area is another BIOS program storage area in the two BIOS program storage areas other than the device's current startup boot area.

Step s304, setting the update area identification information and saving the set update area identification information.

Here, in a specific embodiment, the update identification information includes update flag information and update area flag information, and the update flag information is used to reflect whether there is an upgrade update to the BIOS program, such as setting the update in step s304 The flag information is valid, and the update area flag information is used to mark the updated BIOS program storage area.

Through the BIOS program loading process of the BIOS upgrade method of the embodiment of the present invention, only the BIOS in the second BIOS program storage area (that is, not the current boot area) of the two BIOS program storage areas set has been updated. program, and whether the newly loaded BIOS update program in the second BIOS program storage area is valid is uncertain, because the BIOS program will only be called for execution when the device is started, if the device can be stored with the second BIOS program If the device boots from the second BIOS program storage area, it means that the BIOS program loaded by the upgrade is valid, indicating that the upgrade is successful. memory area boot device starts), it means that the upgrade is not successful. The following describes in detail the method for booting and starting the BIOS after the device is restarted through the description of the embodiments.

Referring to FIG. 4 , it is a schematic flowchart of a BIOS booting and starting method in a BIOS upgrading method according to an embodiment of the present invention. As shown in the figure, the BIOS booting method mainly includes the following steps:

In step s401, the device is powered on and started.

Step s402, prohibit logical address redirection.

Here, the prohibition of logical address redirection means that after the device starts successfully, the CPU of the device controls the hardware logic circuit by executing a software program, and turns on the address line (such as address line) blocked when the device starts between the CPU and the BIOS program memory. Bus A18), and the hardware logic circuit sets the address output state of the BIOS memory to a high-impedance state, thereby ensuring that the CPU can access the normal address of the memory and read data when the device is running normally.

Step s403, read update flag information.

Here, the update flag information is used to reflect whether the BIOS program is updated or not.

Step s404, judging whether there is an update, if the judging result is yes, go to step 404, otherwise, end the process.

Here, when the update flag information is valid, it means that the BIOS program has been updated; otherwise, it means that the BIOS program has not been updated.

Step s405, read update area tag information.

Here, by reading the update area tag information, the system can know which of the two BIOS program memories is updated.

Step s406, judging whether the current boot area is an update area, if the judging result is yes, go to step s407, otherwise go to step s408.

Here, since the hardware logic circuit controls the jump of the BIOS boot area through the switching of the address output state when the device is powered on, if the current boot area (that is, when the secondary device is successfully started), the BIOS program used to boot the device starts storage area) is the update area, it means that the BIOS program storage area of the updated BIOS program can successfully boot the device, indicating that the upgrade is successful; otherwise, if the current boot area is not the update area, the device actually boots the BIOS program storage area that the device starts If the original BIOS program is still stored in the BIOS program storage area, it means that the BIOS program storage area of the updated BIOS program can successfully boot the device (after the device is powered on and jumps to the update area, the boot device fails to boot from the update area. Overtime, the watchdog reset signal resets the hardware logic circuit, triggers to boot the device with the BIOS program storage area that preserves the original BIOS program), and indicates that the upgrade fails.

Step s407, copy and load the BIOS program in the current boot area to another BIOS program storage area.

Step s408, prompting that the upgrade is not successful.

Step s409, setting the update flag information as invalid.

Here, the purpose of step s409 is to ensure that the device runs and uses normally when the BIOS of the device is not upgraded.

Step s410, end processing.

In the BIOS upgrade method of the embodiment of the present invention, by setting two BIOS program storage areas, when the device is running normally, the BIOS program for upgrading is loaded into the second BIOS outside the first BIOS program storage area currently used to boot the device. Program storage area, when the device is powered on again, the hardware logic circuit triggers the device to jump to the second BIOS program storage area to boot the device, if the boot is unsuccessful, the hardware logic circuit triggers the device to jump to the following The first BIOS program storage area that has the original BIOS program is stored to boot the device, thereby avoiding the upgrade failure during the upgrade process, such as failure caused by an abnormality in the BIOS upgrade program or a defect in the BIOS program used for upgrade itself, which is harmful to the device. The potential risks generated ensure that the device can start normally regardless of whether the BIOS upgrade succeeds or fails, and improves the security of the BIOS upgrade.

The above is only a preferred embodiment of the present invention, it should be pointed out that for those of ordinary skill in the art, without departing from the principle of the present invention, some improvements and modifications can also be made, and these improvements and modifications should also be It is regarded as the protection scope of the present invention.

Claims (6)

1. An electronic device, which includes a central processing unit, is characterized in that it also includes a memory, a switch unit, and a basic input and output system BIOS switching unit, wherein: The memory is provided with two BIOS program storage areas, and the BIOS storage area stores a BIOS program for booting the electronic device; A BIOS switching unit, configured to trigger the electronic device to switch from one BIOS program storage area in the memory to booting the electronic device from another BIOS program storage area when the electronic device is powered on or the electronic device is reset; The switch unit is used to disconnect the partition address line from the central processing unit to the memory when the electronic device is turned on or the electronic device is reset, and is used to turn on the partition address line after the electronic device is successfully started . 2. The electronic device according to claim 1, wherein the BIOS switching unit has a first output pin and a second output pin, and when the electronic device is powered on or the electronic device is reset, the first output pin The output state of the pin is an enable signal output state, and the enable signal is used to control the switch unit to disconnect the partition address line from the central processing unit to the memory; After the electronic device is successfully started, the output state of the first output pin is the output state of the prohibition enable signal, and the prohibition enable signal is used to control the switch unit to conduct the connection between the central processing unit and the memory. Partition address line; The output state of the second output pin includes two address output states corresponding to the respective BIOS program storage areas. When the electronic device is powered on or the electronic device is reset, the output state of the second output pin is triggered by One address output state of the two address output states is switched to the other address output state. 3. The electronic device according to claim 2, wherein after the electronic device is successfully started, the output state of the second output pin of the switching unit is a high-impedance state. 4. The electronic device according to claim 3, wherein the BIOS switching unit is a programmable logic circuit. 5. The electronic device according to any one of claims 1 to 4, further comprising a BIOS upgrade control subsystem, the upgrade control subsystem comprising: The first loading unit is used to load the BIOS program used for upgrading to another BIOS program storage area other than the BIOS program storage area currently booting the electronic equipment to start when the BIOS upgrade is performed on the electronic device; The judging unit, after the electronic device restarts successfully, judges whether the BIOS program storage area used to guide the electronic device to start is the other BIOS program storage area when restarting, and generates a corresponding judgment result; The second loading unit is used to load the BIOS program in the BIOS program storage area used to guide the electronic device to start when the judgment result of the judgment unit is yes to the BIOS program storage area outside the BIOS program storage area when restarting. Another BIOS program storage area. 6. The electronic device according to claim 5, wherein the upgrade control subsystem further comprises: The upgrade result output unit is used to output the prompt information of BIOS upgrade success when the judgment result of the judgment unit is yes, and output the prompt information of unsuccessful BIOS upgrade when the judgment result of the judgment unit is no.

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