CN111522602A - Method for starting communication device - Google Patents
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- CN111522602A CN111522602A CN202010324764.1A CN202010324764A CN111522602A CN 111522602 A CN111522602 A CN 111522602A CN 202010324764 A CN202010324764 A CN 202010324764A CN 111522602 A CN111522602 A CN 111522602A
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F9/00—Arrangements for program control, e.g. control units
- G06F9/06—Arrangements for program control, e.g. control units using stored programs, i.e. using an internal store of processing equipment to receive or retain programs
- G06F9/44—Arrangements for executing specific programs
- G06F9/445—Program loading or initiating
- G06F9/44505—Configuring for program initiating, e.g. using registry, configuration files
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W8/00—Network data management
- H04W8/18—Processing of user or subscriber data, e.g. subscribed services, user preferences or user profiles; Transfer of user or subscriber data
- H04W8/183—Processing at user equipment or user record carrier
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W8/00—Network data management
- H04W8/22—Processing or transfer of terminal data, e.g. status or physical capabilities
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Abstract
A method of booting up a communication device, the communication device comprising: an application processor; a modem; a shared memory module coupled to and directly accessible by the application processor, the modem coupled to and indirectly accessible to the shared memory module through the application processor; the method comprises the following steps: reading a modem mirror image file by the application processor; the application processor writes the modem image file into the shared storage module; the modem accesses the shared memory module through the application processor, reads the modem image file and initializes using the modem image file. The invention can effectively reduce the information interaction between the modem and the application processor and simplify the steps of loading and starting.
Description
Technical Field
The present invention relates to the field of communications technologies, and in particular, to a method for starting a communications device.
Background
In the prior art, a communication device usually has at least two integrated circuit chips, one of which is a Modem (Modem) for implementing a cellular communication function, which can be understood as a communication system; another chip is an Application Processor (AP) for implementing functions such as photographing, displaying, 2D/3D engine, etc., and may be understood as an Application processing system.
Generally, if a system requires large capacity, high bandwidth, low latency memory access, the system needs to be collocated with a separate off-chip memory. For example, in a communications device, the modem and the application processor are typically collocated with an off-chip memory. This results in the communication device having multiple off-chip memories at the same time, increasing the overall cost.
In the prior art, the starting method based on the communication device is high in complexity and low in starting efficiency.
Disclosure of Invention
The technical problem to be solved by the invention is to provide a starting method of a communication device, which can effectively reduce the information interaction between a modem and an application processor and simplify the steps of loading and starting.
In order to solve the foregoing technical problem, an embodiment of the present invention provides a method for starting a communication device, where the communication device includes: an application processor; a modem; a shared memory module coupled to and directly accessible by the application processor, the modem coupled to and indirectly accessible to the shared memory module through the application processor; the method comprises the following steps: reading a modem mirror image file by the application processor; the application processor writes the modem image file into the shared storage module; the modem accesses the shared memory module through the application processor, reads the modem image file and initializes using the modem image file.
Optionally, the method for starting the communication device further includes: and after the modem completes initialization, notifying the application processor.
Optionally, the modem image file includes: a second level boot program image file, a third level boot program image file, a kernel image file and a CP image file.
Optionally, the accessing, by the modem, the shared storage module through the application processor, reading the modem image file, and initializing using the modem image file includes: and the modem runs the second-level boot program image file, then jumps to run a third-level boot program image file, then jumps to run the kernel image file, and then jumps to run the CP image file.
Optionally, the modem includes an IRAM; the modem running the second level boot image file comprises: the application processor loads the second-level boot program image file from the shared storage module to the IRAM; the modem runs the second level boot image file in the IRAM.
Optionally, the modem includes an IRAM; the modem running the second level boot image file comprises: and the modem loads the second-level boot program image file from the shared storage module to the IRAM and runs the second-level boot program image file in the IRAM.
Optionally, the running, by the modem, the second-level boot image file includes: the modem runs the second level boot image file in the shared storage module.
Optionally, before the modem accesses the shared storage module through the application processor and reads the modem image file, the method further includes: establishing connection communication between the application processor and a modem.
Optionally, the establishing connection communication between the application processor and the modem includes: the application processor initializes a main D-BUS and waits for an auxiliary D-BUS initialization to take effect, and the modem initializes the auxiliary D-BUS and waits for the main D-BUS initialization to take effect; D-BUS is used to establish connection communication between the application processor and the modem.
Optionally, before the modem accesses the shared storage module through the application processor and reads the modem image file, the method further includes: and running a first-level starting program of the application processor, then jumping to a second-level application processor starting program, then jumping to a third-level application processor starting program, and then jumping to a kernel program of the application processor to initialize the application processor.
Compared with the prior art, the technical scheme of the embodiment of the invention has the following beneficial effects:
in the embodiment of the invention, in a system architecture based on an application processor, a modem and a shared memory module, by setting the shared memory module to be hung on one side of the shared memory module, for example, an AP side, and then the modem accesses the shared memory module through the application processor, reads the modem image file and uses the modem image file for initialization, compared with the prior art, the application processor and the modem respectively have independent off-chip memories, which causes the modem to need to interact information with the application processor through multiple handshakes to feed back the initialization situation.
Further, the step of writing the modem image file into the shared storage module by setting the application processor, and then the modem runs the second-level boot program image file, then jumps to run the third-level boot program image file, then jumps to run the kernel image file, and then jumps to run the CP image file is further provided The system is operated, the complexity of system starting is effectively reduced, and the starting efficiency of the system is improved.
Further, the application processor may be configured to load the second-level boot image file from the shared storage module to the IRAM, and the modem runs the second-level boot image file in the IRAM, thereby implementing the scheme in the embodiment of the present invention.
Further, the modem may be configured to load the second-level boot image file from the shared storage module to the IRAM, and run the second-level boot image file in the IRAM, thereby implementing the scheme in the embodiment of the present invention.
Further, the modem may be configured to run the second-level boot program image file in the shared storage module, so that steps of loading the second-level boot program image file from the shared storage module to the IRAM are reduced, and thus, the scheme in the embodiment of the present invention is implemented with fewer steps, which is beneficial to further reducing complexity and improving efficiency.
Drawings
Fig. 1 is a data flow diagram of a method of booting up a communication device in the prior art;
fig. 2 is a flowchart of a method for starting a first communication device according to an embodiment of the present invention;
fig. 3 is a schematic structural diagram of a communication device according to an embodiment of the present invention;
fig. 4 is a data flow diagram of a startup method of a second communication apparatus in the embodiment of the present invention;
fig. 5 is a data flow diagram of a startup method of a third communication apparatus in the embodiment of the present invention;
fig. 6 is a data flow diagram of a startup method of a fourth communication apparatus in the embodiment of the present invention;
fig. 7 is a data flow diagram of a startup method of a fifth communication apparatus in the embodiment of the present invention.
Detailed Description
As described above, in the conventional communication device, each system separately configures an off-chip physical memory, which results in that the communication device has a plurality of off-chip memories at the same time, and the overall cost increases, and the problems of high complexity of the starting method and low starting efficiency also exist.
Referring to fig. 1, fig. 1 is a data flow diagram of a startup method of a communication apparatus in the prior art. The communication device comprises an application processor 11 and a modem 12, the application processor 11 may be used for implementing functions such as capturing, displaying, 2D/3D engine, etc., which may be understood as an application processing system, and the modem 12 may be used for implementing a cellular communication function, which may be understood as a communication system. The method for starting the communication apparatus may include steps S101 to S114, and each step is described below.
In step S101, the application processor 11 may supply Power (Power On) to the modem 12.
In step S102, the application processor 11 establishes connection communication with the modem 12.
In step S103, the Modem 12 requests the application processor 11 to download the second level boot image file from the Modem DDR.
Specifically, modem 12 may read a modem-related image file from memory on the modem 12 side.
In one prior art implementation, the memory on the Modem 12 side may be Modem Random access memory (DDR SDRAM), such as DDR SDRAM (DDR SDRAM), Low Power (Low Power) derived DDR memory (e.g., LPDDR2, LPDDR3, LPDDR3x, LPDDR4, LPDDR4x, LPDDR5 …), and an upgraded version of DDR memory (e.g., DDR2/DDR3/DDR4/DDR5 …), also referred to as Modem.
In step S104, the Modem 12 downloads the second-stage boot image file from the Modem DDR.
In step S105, modem 12 verifies, loads, stores, and runs the second level boot image file.
In step S106, the Modem 12 requests the application processor 11 to download the third level boot image file from the Modem DDR.
In step S107, the Modem 12 downloads the third-stage boot image file from the Modem DDR.
In step S108, modem 12 checks, loads, stores, and runs the third level boot image file.
In step S109, the Modem 12 requests the application processor 11 to download the kernel image file from the Modem DDR.
In step S110, the Modem 12 downloads the kernel image file from the Modem DDR.
In step S111, the modem 12 checks, loads, stores, and runs the kernel image file.
In step S112, the Modem 12 requests the application processor 11 to download the CP image file from the Modem DDR.
In step S113, the Modem 12 downloads the CP image file from the Modem DDR.
In step S114, the modem 12 checks, loads, stores, and runs the CP image file.
The inventor of the present invention has found through research that in the prior art, the application processor and the modem respectively have independent off-chip memories, so that the modem needs to exchange information with the application processor through multiple handshakes to feed back the initialization condition.
In the embodiment of the invention, an application processor is arranged to read a modem image file; the application processor writes the modem image file into the shared storage module; the modem accesses the shared memory module through the application processor, reads the modem image file and initializes using the modem image file. Compared with the prior art that the application processor and the modem are respectively provided with independent off-chip memories, the modem needs to handshake information with the application processor for multiple times to feed back the initialization, the scheme of the embodiment of the invention can effectively reduce the information interaction between the modem and the application processor, and simplify the loading and starting steps.
In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in detail below.
Referring to fig. 2, fig. 2 is a flowchart of a method for starting a first communication apparatus according to an embodiment of the present invention. The startup method of the communication apparatus may include steps S21 to S23:
step S21: reading a modem mirror image file by the application processor;
step S22: the application processor writes the modem image file into the shared storage module;
step S23: the modem accesses the shared memory module through the application processor, reads the modem image file and initializes using the modem image file.
In the specific implementation of step S21, the communication device may include an application processor and a modem, and may further include a shared memory module.
Referring to fig. 3, fig. 3 is a schematic structural diagram of a communication device according to an embodiment of the present invention. The communication means may comprise an application processor 31, a modem 32 and a shared memory module 33.
Wherein the application processor 31 is coupled to the shared memory module 33 and has direct access to the shared memory module 33, and the modem 32 is coupled to the application processor 31 and has indirect access to the shared memory module 33 through the application processor 31.
With continued reference to FIG. 2, in an implementation of step S21, the step of reading the modem image file by the application processor may include: and reading out the image file related to the modem from the memory at the application processor side, and carrying out security and validity check. The memory on the application processor side may be an Embedded Flash memory (NAND Flash), an Embedded multimedia memory/memory Card (eMMC), a universal Flash memory/Card (UFS), or the like.
Further, the modem image file may include: a second level boot program image file, a third level boot program image file, a kernel image file and a CP image file.
The Second level boot Loader (SPL) image file may be used to represent an initial or important boot Program, such as a boot Program for adjusting a Central Processing Unit (CPU) of a Modem and a bus core clock.
The third-level Boot Loader (Uboot) image file may be used to represent a secondary Boot program, such as a Boot program that depends on the second-level Boot program, for example, a Boot program for initializing a base module of the Modem chip, identifying a Boot mode, and initializing a Modem communication parameter.
The kernel image file may be used to represent a boot program of a Linux Operating System (OS) System or a Real-time Operating System (RTOS) kernel.
The Coprocessor (CP) image file may be used to represent a Coprocessor or program module running on the modem side for communication related traffic processing.
In an implementation of step S22, the application processor writes the modem image file to the shared storage module.
In a specific implementation manner of the embodiment of the present invention, the application processor may read and write all image files required for starting the modem into the shared storage module at one time, so as to further reduce the number of information interactions, reduce signaling overhead, and improve efficiency.
In an implementation of step S23, the modem may access the shared memory module through the application processor, read the modem image file and initialize using the modem image file.
Further, the step of the modem accessing the shared memory module through the application processor, reading the modem image file and initializing using the modem image file may include: and the modem runs the second-level boot program image file, then jumps to run a third-level boot program image file, then jumps to run the kernel image file, and then jumps to run the CP image file.
In the embodiment of the invention, by arranging the shared storage module to be hung on one side of the system architecture based on the application processor, the modem and the shared storage module, for example, an AP side, and then the modem accesses the shared storage module through the application processor, reads the modem image file and uses the modem image file for initialization, compared with the prior art that the application processor and the modem respectively have independent off-chip memories, the modem needs to handshake interaction information with the application processor for multiple times to feed back the initialization, by adopting the scheme of the embodiment of the invention, the information interaction between the modem and the application processor can be effectively reduced, and the loading and starting steps are simplified.
Referring to fig. 4, fig. 4 is a data flow diagram of a startup method of a second communication apparatus in the embodiment of the present invention. The communication device includes an application processor 41, a modem 42 and a shared memory module 43, and the second method for starting the communication device may include steps S401 to S409, which are described below.
In step S401, the application processor 41 supplies power to the modem 42.
In step S402, the application processor 41 verifies and writes the modem image file to the shared memory module 43.
The application processor 41 may read the image file related to the modem from the memory on the application processor side.
In step S403, connection communication is established between the application processor 41 and the modem 42.
In step S404, the modem 42 can access the shared storage module 43 through the application processor 41, and read the modem image file.
In step S405, the modem 42 may run a second level boot image file.
It will be appreciated that the modem image file containing the second level boot image file has been written to the shared memory module 43 and that the modem 42 may retrieve the respective modem image file by means of a connection communication without applying for it from the application processor AP.
In step S406, the modem 42 may Jump (Jump to) to run the third level boot image file.
In step S407, the modem 42 may jump to run the kernel image.
In step S408, the modem 42 may jump to running the CP image.
After the initialization is completed, the modem 42 may notify the application processor 41 in step S409.
Specifically, after the system boot load is completed, the modem 42 may notify the application processor 41 to enter normal service initialization and interaction.
In the specific implementation, more details about steps S401 to S409 are performed with reference to the description of steps in fig. 2, and are not described herein again.
In the embodiment of the present invention, through setting the step of writing the modem image file into the shared storage module 43 by the application processor 41, and then the modem 42 runs the second-level boot program image file, then jumps to run the third-level boot program image file, then jumps to run the kernel image file, and then jumps to run the CP image file, compared with the prior art that the modem needs to perform operations such as transmission, verification, loading, storage, and running on the current image file during each run by adopting a manner of multiple information interactions and multiple loading of the modem image file, and jumps to the next program after waiting for the completion of loading of the next image file, so that the complexity of system boot is higher and the boot efficiency is lower, by adopting the scheme of the embodiment of the present invention, the modem 42 can only need to operate the modem image file written in the shared storage module 43 at a time, thereby effectively reducing the complexity of system startup and improving the startup efficiency of the system.
Referring to fig. 5, fig. 5 is a data flow diagram of a startup method of a third communication apparatus in the embodiment of the present invention. The third method for activating a communication apparatus may include steps S501 to S514, and the steps are described below.
Specifically, the third communication device may include an application processor 51, a modem 52, and a shared memory module 53.
The application processor 51 may initialize the application processor 51 through a first-level boot program (Romcode)511, a second-level chip boot program (SPL)512, a third-level chip system boot program (Uboot)513, a Linux OS system or real-time operating system Kernel (Kernel) program 514, and a modem management and control program 515 on the application processor 51 side.
The modem management program 515 runs on the application processor side, and is configured to manage the modem 52.
The modem 52 can be updated with a first-level boot program (Romcode)521, a second-level chip boot program (SPL)522, a third-level chip system boot program (Uboot)523, a Linux OS system or a real-time operating system Kernel (Kernel) program 524, and a CP on the modem 52 side, read the modem image file, and initialize using the modem image file.
In step S501, after the application processor 51 runs the application processor first-level boot program, it jumps to the second-level application processor boot program.
In step S502, after the application processor 51 runs the second-level application processor startup program, it jumps to the third-level application processor startup program.
In step S503, after the application processor 51 runs the third-level application processor startup program, it jumps to the running of the application processor kernel program to initialize the application processor.
It should be noted that the steps shown in steps S501 to S503 for initializing the application processor 51 are only examples, and in the embodiment of the present invention, other suitable steps may also be adopted for initializing the application processor 51.
In step S504, the application processor 51 verifies and writes the modem image file to the shared memory module 53.
In step S505, the application processor 51 supplies power to the modem 52.
Further, in steps S506 to S508, a method of establishing connection communication between the application processor and the modem is shown. The step of establishing connection communication between the application processor and the modem may comprise: the application processor initializes a master (data transmission BUS or interface, D-BUS) and waits for the slave D-BUS initialization to take effect, and the modem initializes the slave D-BUS and waits for the master D-BUS initialization to take effect; D-BUS is used to establish connection communication between the application processor and the modem.
In step S506, the application processor 51 may initialize the master D-BUS and wait for the slave D-BUS initialization to take effect.
In step S507, modem 52 may initialize the auxiliary D-BUS and wait for the main D-BUS initialization to take effect.
In step S508, the application processor 51 and the modem 52 can establish connection communication using the D-BUS.
It should be noted that the steps S506 and S507 may be executed simultaneously to improve the efficiency of establishing connection communication.
In step S509, the application processor 51 may load the second-level boot image file from the shared storage module 53 to an Integrated Random Access Memory (IRAM) on the modem 52 side.
In step S510, the modem 52 may run the second level boot image file in IRAM.
In step S511, after the modem 52 runs the second-level boot image, it jumps to the third-level boot image.
In step S512, after the modem 52 runs the third-level boot image, it jumps to the kernel image.
In step S513, after the modem 52 runs the kernel image, it jumps to running the CP image.
After the initialization is completed, the modem 52 may notify the application processor 51 in step S514.
In the specific implementation, more details about steps S501 to S514 are described with reference to steps in fig. 2 to 4, and are not described herein again.
In this embodiment of the present invention, the application processor 51 may be configured to load the second-level boot program image file from the shared storage module 53 to the IRAM, and the modem 52 runs the second-level boot program image file in the IRAM, thereby implementing the scheme in this embodiment of the present invention.
Referring to fig. 6, fig. 6 is a data flow diagram of a startup method of a fourth communication apparatus in the embodiment of the present invention. The difference from the third method of starting up the communication apparatus shown in fig. 5 is that step S609 is used instead of step S509, and step S609 is explained below.
In step S609, the modem 52 loads the second-level boot image file from the shared storage module 53 to the IRAM, and runs the second-level boot image file in the IRAM.
In the specific implementation, more details about steps S501 to S514 are described with reference to steps in fig. 5 for execution, and are not described herein again.
In this embodiment of the present invention, the modem 52 may be configured to load the second-level boot image file from the shared storage module 53 to the IRAM, and run the second-level boot image file in the IRAM, so as to implement the scheme in this embodiment of the present invention.
Referring to fig. 7, fig. 7 is a data flow diagram of a startup method of a fifth communication apparatus in the embodiment of the present invention. The difference from the third method of activating the communication apparatus shown in fig. 5 is that step S710 is used instead of step S509 and step S510, and step S710 is explained below.
In step S710, the modem 52 runs the second-level boot image file in the shared memory module 53.
In the embodiment of the present invention, the modem 52 may be configured to run the second-level boot program image file in the shared storage module 53, so as to reduce the step of loading the second-level boot program image file from the shared storage module 53 to the IRAM, and thus, fewer steps are adopted to implement the scheme in the embodiment of the present invention, which is beneficial to further reducing complexity and improving efficiency.
In the specific implementation, more details about steps S501 to S514 are described with reference to steps in fig. 5 for execution, and are not described herein again.
Although the present invention is disclosed above, the present invention is not limited thereto. Various changes and modifications may be effected therein by one skilled in the art without departing from the spirit and scope of the invention as defined in the appended claims.
Claims (10)
1. A method for starting a communication device, the communication device comprising:
an application processor;
a modem;
a shared memory module coupled to and directly accessible by the application processor, the modem coupled to and indirectly accessible to the shared memory module through the application processor;
the method comprises the following steps:
reading a modem mirror image file by the application processor;
the application processor writes the modem image file into the shared storage module;
the modem accesses the shared memory module through the application processor, reads the modem image file and initializes using the modem image file.
2. The method of claim 1, further comprising: and after the modem completes initialization, notifying the application processor.
3. The method of claim 1, wherein the modem image file comprises: a second level boot program image file, a third level boot program image file, a kernel image file and a CP image file.
4. A method as recited in claim 3, wherein said modem accessing said shared memory module via said application processor, reading said modem image file and initializing using said modem image file comprises:
and the modem runs the second-level boot program image file, then jumps to run a third-level boot program image file, then jumps to run the kernel image file, and then jumps to run the CP image file.
5. The method of claim 4, wherein the modem comprises an IRAM;
the modem running the second level boot image file comprises:
the application processor loads the second-level boot program image file from the shared storage module to the IRAM;
the modem runs the second level boot image file in the IRAM.
6. The method of claim 4, wherein the modem comprises an IRAM;
the modem running the second level boot image file comprises:
and the modem loads the second-level boot program image file from the shared storage module to the IRAM and runs the second-level boot program image file in the IRAM.
7. The method of claim 4, wherein the modem running the second level boot image file comprises:
the modem runs the second level boot image file in the shared storage module.
8. The method of claim 1, further comprising, before the modem accesses the shared memory module via the application processor and reads the modem image file:
establishing connection communication between the application processor and a modem.
9. The method of claim 8, wherein establishing connection communication between the application processor and a modem comprises:
the application processor initializes the master D-BUS and waits for the slave D-BUS initialization to take effect, and,
the modem initializes the auxiliary D-BUS and waits for the main D-BUS to be initialized and effective;
D-BUS is used to establish connection communication between the application processor and the modem.
10. The method of claim 1, further comprising, before the modem accesses the shared memory module via the application processor and reads the modem image file:
and running a first-level starting program of the application processor, then jumping to a second-level application processor starting program, then jumping to a third-level application processor starting program, and then jumping to a kernel program of the application processor to initialize the application processor.
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| WO2022105595A1 (en) * | 2020-11-20 | 2022-05-27 | 展讯通信（上海）有限公司 | Method and apparatus for upgrading system of embedded device, and embedded device |
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| CN112463260B (en) * | 2021-01-26 | 2021-04-20 | 杭州万高科技股份有限公司 | Secure startup method for terminal device, terminal device and medium |
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