WO2017000567A1 - Bootrom upgrading method and device - Google Patents

Abstract

A BOOTROM upgrading method and device. The method comprises: if a boot read-only memory (BOOTROM) for operation startup is in a first partition, selecting a second partition to perform BOOTROM upgrading; and after the BOOTROM upgrade is completed in the second partition, modifying, by a terminal, a CPU startup address from being mapped to the first partition to being mapped to the second partition, and starting, according to the mapping of the CPU startup address, the upgraded BOOTROM in the second partition, the second partition being another partition other than the first partition where the current BOOTROM for operation startup is located.

Description

Method and device for implementing BOOTROM upgrade Technical field

This document refers to, but is not limited to, system application upgrade technology, especially a method and device for implementing boot bootloader (BOOTROM) upgrade.

Background technique

The system application of electronic communication needs to be upgraded continuously due to changes in application scenarios, expansion of functions, and correction of bugs. When the system is upgraded, the system's BootROM is also upgraded. The reliability of the BOOTROM upgrade is critical to the system application. If the upgrade fails, the system may not be able to start directly.

The BOOTROM is generally stored in the flash memory (FLASH) memory. In the related art, the BOOTROM upgrade method and the existing defects are as follows: 1. Directly overwriting the old version of the BootROM in the FLASH. The problem with this method is that if the upgrade fails, it will directly lead to The system cannot be started. 2. The FLASH is divided into two partitions. One area retains the factory BOOTROM. Each upgrade only upgrades another partition. The problem with this method is that if the upgrade fails or the system is damaged, the user can only put the BootROM. If you return to the factory BOOTROM, you cannot roll back to the BOOTROM before the upgrade.

Summary of the invention

The following is an overview of the topics detailed in this document. This Summary is not intended to limit the scope of the claims.

The embodiment of the invention provides a method and a device for upgrading a BootROM. The BOOTROM can be upgraded under the premise of using the FLASH storage space. If the BOOTROM fails to be upgraded, the BOOTROM before the upgrade can be restarted.

The embodiment of the invention provides a method for implementing BOOTROM upgrade, which includes:

When the diskless boot ROM ROM of the booting is started in the first partition, the terminal selects the second partition to perform the BootROM upgrade;

After the second partition completes the BootROM upgrade, the terminal will map the CPU boot address from the original one. Modifying to the first partition to map to the second partition, to start the upgraded BootROM in the second partition according to the mapping of the CPU boot address;

The second partition is another partition except the first partition where the BootROM currently running is located.

Optionally, the method further includes:

The terminal presets a corresponding startup identifier for the first partition and the second partition by using the complex programmable logic device CPLD and assigns a corresponding value; and maps the CPU startup address to the start of the running BOOTROM according to the value of the startup identifier. A partition is modified to be mapped to the second partition of the upgraded BootROM.

Optionally, the method further includes:

When the second partition is selected for the BootROM upgrade, the terminal writes and protects the first partition where the BootROM that is currently running is located;

After the BOOTROM upgrade is completed, the terminal releases the write protection for the first partition.

Optionally, the method further includes:

When the booting of the upgraded BootROM fails, the terminal remaps the CPU boot address to the first partition to select to start the BootROM running the first partition.

Optionally, the first partition and the second partition are partitions of the same size in the FLASH memory.

Embodiments of the present invention also provide a computer readable storage medium storing computer executable instructions for performing any of the methods described above.

On the other hand, an embodiment of the present invention further provides an apparatus for implementing a BOOTROM upgrade, including: a selecting unit, a mapping processing unit, where

Selecting a unit, setting to select the second partition for BOOTROM upgrade when the booting BootROM is in the first partition;

After the mapping processing unit is set to the second partition to complete the BootROM upgrade, the CPU boot address is modified from the original mapping to the first partition to be mapped to the second partition, so as to start the upgraded BootROM in the second partition according to the mapping of the CPU boot address. ;

The second partition is another partition except the first partition where the BootROM currently running is located.

Optionally, the device further includes a preset unit,

Set to preset a corresponding startup identifier for the first partition and the second partition by using the complex programmable logic device CPLD and assign a corresponding value; to map the CPU boot address to the booting operation BOOTROM according to the value of the boot identifier The first partition is modified to be mapped to the second partition of the upgraded BootROM.

Optionally, the device further includes a write protection unit, configured to perform write protection on the first partition where the BootROM that is currently started to run is performed when the second partition is selected for BOOTROM upgrade;

After the BOOTROM upgrade is completed, write protection is disabled for the first partition.

Optionally, the mapping processing unit is further configured to: when the BootROM startup of the upgrade is started, fail to map the CPU boot address to the first partition to select to start the BootROM running the first partition.

Optionally, the first partition and the second partition are partitions of the same size in the FLASH memory.

Compared with the related art, the technical solution of the present application includes: when starting the running diskless boot ROM ROM in the first partition, selecting the second partition to perform the BootROM upgrade; after the second partition completes the BootROM upgrade, the CPU boot address is The original mapping to the first partition is modified to be mapped to the second partition, so that the second partition starts the upgraded BootROM according to the mapping of the CPU startup address; the second partition is the first partition except the BootROM that is currently started to run. Another partition. The method of the embodiment of the invention performs system upgrade through two partitions, thereby avoiding waste of the FLASH storage space;

On the other hand, when the BOOTROM is upgraded, the partition where the BOOTROM is started is write-protected. After the upgrade fails, the BOOTROM before the upgrade is not re-selected, which improves the reliability of the system.

Other aspects will be apparent upon reading and understanding the drawings and detailed description.

BRIEF abstract

FIG. 1 is a flowchart of a method for implementing BOOTROM upgrade according to an embodiment of the present invention;

2 is a structural diagram of an apparatus for implementing BOOTROM upgrade according to an embodiment of the present invention;

3 is a flow chart of a method in accordance with a first embodiment of the present invention.

Embodiments of the invention

Embodiments of the present invention will be described in detail below with reference to the accompanying drawings. It should be noted that, in the case of no conflict, the features in the embodiments and the embodiments in the present application may be arbitrarily combined with each other.

FIG. 1 is a flowchart of a method for implementing BOOTROM upgrade according to an embodiment of the present invention. As shown in FIG. 1 , the method includes:

Step 100: When the bootless read-only memory (BOOTROM) is started in the first partition, the terminal selects the second partition to perform the BootROM upgrade; where the second partition is other than the first partition where the BootROM currently started to run is located. Another partition.

Before the method of the embodiment of the present invention, the method further includes:

The terminal pre-sets a corresponding startup identifier for the first partition and the second partition by using a Complex Programmable Logic Device (CPLD) and assigns a corresponding value; the CPU (CPU) according to the value of the startup identifier , Central Processing Unit) The boot address is mapped to the first partition that starts the running BootROM or modified to the second partition mapped to the upgraded BootROM.

In the method of the embodiment of the present invention, the first partition and the second partition are partitions of the same size in the FLASH memory.

Step 101: After the second partition completes the BootROM upgrade, the terminal modifies the CPU boot address from the original mapping to the first partition to be mapped to the second partition, so as to start the upgraded BootROM in the second partition according to the mapping of the CPU boot address.

The method of the embodiment of the invention further includes:

When the second partition is selected for the BootROM upgrade, the terminal writes and protects the first partition where the BootROM currently running is written;

After the BOOTROM upgrade is completed, the terminal releases the write protection for the first partition.

The method of the embodiment of the present invention further includes: when the booting of the upgraded BootROM fails, The terminal remaps the CPU boot address to the first partition to select to start the BootROM running the first partition.

It should be noted that if the second partition is successfully started, the partition that is started to be run is replaced by the partition that the BootROM upgrades successfully. That is, after the BOOTROM is upgraded and the boot succeeds, the partition will become the first partition, and the partition that originally started the BootROM becomes used for The second partition of the BOOTROM upgrade.

The method of the invention performs system upgrade through two partitions, thereby avoiding waste of FLASH storage space;

On the other hand, when the BOOTROM is upgraded, the partition where the BOOTROM is started is write-protected. After the upgrade fails, the BOOTROM before the upgrade is not re-selected, which improves the reliability of the system.

Embodiments of the present invention also provide a computer readable storage medium storing computer executable instructions for performing any of the methods described above.

2 is a structural diagram of an apparatus for implementing BOOTROM upgrade according to an embodiment of the present invention. As shown in FIG. 2, the method includes: a selecting unit, a mapping processing unit, where

Selecting a unit, setting to select the second partition for BOOTROM upgrade when the booting BootROM is in the first partition;

After the mapping processing unit is set to the second partition to complete the BootROM upgrade, the CPU boot address is modified from the original mapping to the first partition to be mapped to the second partition, so as to start the upgraded BootROM in the second partition according to the mapping of the CPU boot address. ;

The second partition is another partition other than the first partition in which the BootROM currently running is located.

The device of the embodiment of the invention further includes a preset unit,

It is configured to preset a corresponding startup identifier for the first partition and the second partition by using the complex programmable logic device CPLD and assign a corresponding value; to map the CPU startup address to the first booting BOOTROM according to the value of the startup identifier. Partition or modify to the second partition mapped to the upgraded BootROM.

The device of the embodiment of the invention further includes a write protection unit configured to select the second partition When the BOOTROM is upgraded, the first partition where the BootROM currently running is write-protected;

After the BOOTROM upgrade is completed, write protection is disabled for the first partition.

The mapping processing unit is further configured to: when the booting of the BootROM to start the upgrade fails, re-map the CPU boot address to the first partition to select to start the BootROM running the first partition.

The first partition and the second partition are partitions of the same size in the FLASH memory.

The method of the present invention is described in detail below by way of specific examples, which are merely used to illustrate the invention and are not intended to limit the scope of the method of the invention.

Example 1

FIG. 3 is a flowchart of a method according to a first embodiment of the present invention. As shown in FIG. 3, the method includes:

Step 300: The terminal divides the FLASH memory into two partitions of the same size; one partition is used as the partition for starting the BootROM, and the other partition is used as the partition for upgrading the BootROM; in general, the BOOTROM partition that is started to run is the original BOOTROM before the upgrade. The partition where the BootROM is located. When the second upgrade is performed, the BOOTROM partition that is started is the partition where the BootROM is located after the last upgrade.

Step 301: The terminal pre-sets a corresponding startup identifier for the two partitions by using the CPLD, and assigns a corresponding value, and maps the CPU startup address to the partition where the BootROM is started according to the value of the startup identifier;

Here, before the upgrade, the terminal maps the CPU startup address to the first partition that starts the BootROM. After the upgrade, the terminal modifies the CPU startup address to the partition mapped to the upgraded BootROM. The value of the startup identifier can be represented by a bit (BIT) bit. A general 1 represents the BootROM that starts the partition, and 0 represents the partition used for the upgrade of the BootROM.

It should be noted that, here, the terminal performs the CPU startup address modification according to the value of the startup identifier, that is, when the startup identifier is modified, the CPU startup address mapping is modified.

Step 302: When the booting BootROM is in the first partition, the terminal selects the second partition to perform the BootROM upgrade; where the first partition is the current running BootROM. Area. During the upgrade, the first partition is write-protected, that is, the data write address of the first partition prohibits data writing. After the BootROM upgrade is completed, the first partition write protection is released.

Step 303: After the second partition completes the BootROM upgrade, the terminal modifies the CPU boot address from the original mapping to the first partition to be mapped to the second partition, so as to start the upgraded BootROM in the second partition according to the mapping of the CPU boot address.

If the upgraded BootROM is successfully started, go to step 304. If it fails, go to step 305.

Step 304: After the upgraded BootROM is successfully started, the terminal keeps mapping the CPU startup address to the partition where the upgraded BootROM is located before the next upgrade succeeds; here, after the upgrade is completed and the startup is successful, the partition is used as the first partition by default. use.

Step 305: When the upgraded BootROM fails to be started, the terminal remaps the CPU startup address to the partition that previously started the BootROM to select to start the BootROM running the partition; that is, the value of the startup identifier fails to be upgraded after the upgrade is completed, and is re-modified. Until the original value, the first partition will not be changed.

In summary, in this embodiment, the FLASH memory is divided into two partitions, and the complex programmable logic device automatically updates the read and write values of the boot identifier, so that the BOOTROM upgrade is performed in two partitions, and the currently running partition is performed. Write protection saves FLASH space cost and improves the reliability of BOOTROM upgrade.

One of ordinary skill in the art will appreciate that all or a portion of the above steps may be performed by a program to instruct related hardware, such as a processor, which may be stored in a computer readable storage medium, such as a read only memory, disk or optical disk. Wait. Alternatively, all or part of the steps of the above embodiments may also be implemented using one or more integrated circuits. Correspondingly, each module/unit in the foregoing embodiment may be implemented in the form of hardware, for example, by implementing an integrated circuit to implement its corresponding function, or may be implemented in the form of a software function module, for example, executing a program in a storage and a memory by a processor. / instruction to achieve its corresponding function. The invention is not limited to any specific form of combination of hardware and software.

While the embodiments of the present invention have been described above, the described embodiments are merely for the purpose of understanding the invention and are not intended to limit the invention. Any modification and variation in the form and details of the embodiments may be made by those skilled in the art without departing from the spirit and scope of the invention. The scope defined by the appended claims shall prevail.

Industrial applicability

The above technical solution avoids waste of FLASH storage space;

On the other hand, after the upgrade fails, the BOOTROM before the upgrade is not re-selected can be re-selected, which improves the reliability of the system.

Claims (11)

A method for implementing boot boot BOOTROM upgrade, comprising: When the diskless boot ROM ROM of the booting is started in the first partition, the terminal selects the second partition to perform the BootROM upgrade; After the second partition completes the BootROM upgrade, the terminal modifies the CPU processor boot address from the original mapping to the first partition to be mapped to the second partition, so as to start the upgraded BootROM in the second partition according to the mapping of the CPU boot address; The second partition is another partition except the first partition where the BootROM currently running is located. The method of claim 1 further comprising: The terminal presets a corresponding startup identifier for the first partition and the second partition by using the complex programmable logic device CPLD and assigns a corresponding value; and maps the CPU startup address to the startup BOOTROM according to the value of the startup identifier. The first partition is modified or modified to be mapped to the second partition of the upgraded BOOTROM. The method of claim 1 further comprising: When the second partition is selected for the BootROM upgrade, the terminal performs write protection on the first partition where the BootROM that is currently started to run is located; After the BOOTROM upgrade is completed, the terminal releases the write protection for the first partition. The method of claim 1 further comprising: When the booting of the upgraded BootROM fails, the terminal remaps the CPU boot address to the first partition to select to start the BootROM running the first partition. The method of claim 1, wherein the first partition and the second partition are partitions of the same size as the storage space in the flash FLASH memory. An apparatus for implementing a boot boot program BOOTROM upgrade, comprising: a selecting unit, a mapping processing unit; wherein Select the unit, set to select the second when starting the running BootROM in the first partition Partition for BOOTROM upgrade; After the mapping processing unit is set to the second partition to complete the BootROM upgrade, the CPU processor startup address is modified from the original mapping to the first partition to be mapped to the second partition, so as to start the upgrade in the second partition according to the mapping of the CPU startup address. Completed BOOTROM; The second partition is another partition except the first partition where the BootROM currently running is located. The apparatus according to claim 6, further comprising a preset unit, Set to preset a corresponding startup identifier for the first partition and the second partition by using the complex programmable logic device CPLD and assign a corresponding value; to map the CPU boot address to the booting operation BOOTROM according to the value of the boot identifier The first partition is modified to be mapped to the second partition of the upgraded BootROM. The device according to claim 6, further comprising a write protection unit configured to write to the first partition where the BootROM currently running is written when the second partition is selected for BOOTROM upgrade protection; After the BOOTROM upgrade is completed, the first partition is unlocked. The apparatus according to claim 6, the mapping processing unit is further configured to: when the startup of the upgraded BootROM fails, the CPU startup address is mapped to the first partition to select to start the first operation. Partitioned BOOTROM. The apparatus according to claim 6, wherein the first partition and the second partition are partitions of the same size in the FLASH memory. A computer readable storage medium storing computer executable instructions for performing the method of any one of claims 1 to 5.

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