CN101067794A - Multi-nuclear processor and serial port multiplexing method - Google Patents
Multi-nuclear processor and serial port multiplexing method Download PDFInfo
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Abstract
This invention discloses a multi-core processor and a serial multiplex method used in it including: a multi-core multithreading processor used in operating at least one kernel thread and switching of serial among kernel threads after receiving the switch control information from the switch control module, a serial used in sending data of at least one kernel thread of the processor to outside and interacts data with the master control kernel thread of the serial and a switch control module connected between the serial and the processor to control switch of one or many threads in the processor to share the serial.
Description
Technical field
The present invention relates to the polycaryon processor field, relate in particular to when polycaryon processor moves a plurality of embedded OS, realize a kind of technology of multiplexing serial port.
Background technology
The high-performance polycaryon processor has obtained using widely in embedded system, the different threads of a plurality of kernels of polycaryon processor can the independent operating embedded OS, the embedded OS of main flow can print and debug by the serial ports Shell of based target veneer at present, and opening brings great convenience to software.
Yet the serial port resource of polycaryon processor system is extremely limited, can not fix a serial ports for each kernel thread, so can expand serial ports by hardware design circuit usually, reach the purpose that increases the serial ports number, because most of serial port resource all left unused in the most of the time, can cause the waste of serial port resource, also increase cost simultaneously; Perhaps as the CN200510030862 patent, it is to switch between GPS serial ports and CPU serial ports by hardware handover module control serial ports, reach the purpose of multiplexing serial port, this multiplexing tangible alternative that has, the current time serial ports can only be monopolized by an equipment, other equipment can't use serial ports, may cause when hardware switches serial ports simultaneously and use the software data of serial ports to lose.
In order to give full play to the effect of serial ports in polycaryon processor, switching between a plurality of kernel threads by the software control serial ports is a kind of method of well dealing with problems, and has not only improved the utilization factor of serial port resource, and controllability and reliability can both be guaranteed.
Summary of the invention
One object of the present invention is to overcome in the limited embedded system of serial port resource serial ports can't fully multiplexing shortcoming, therefore proposes a kind ofly to finish serial ports multiplexing method between each kernel thread jointly by utilizing polycaryon processor inside story mechanism, shared drive and interrupting mechanism such as switching.
According to an aspect of the present invention, provide a kind of polycaryon processor, having comprised: the multinuclear multiline procedure processor is used to move at least one kernel thread, and after receiving the switching controls message of switching controls module, carries out the switching of serial ports between kernel thread; Serial ports is used for the data of at least one kernel thread of multinuclear multiline procedure processor are sent to the outside, and be used for the serial ports main kernel thread that serial ports interrupts articulating and carry out data interaction; And the switching controls module, being connected between serial ports and the multinuclear multiline procedure processor, the switching of one or more kernel threads that is used for controlling the multinuclear multiline procedure processor is to share serial ports.
The switching controls module regularly sends switching controls message to the multinuclear multiline procedure processor.The switching controls module provides the operation information of each kernel thread to the user, indicates the user under the situation of switching the serial ports main kernel thread, and the switching controls module sends the switching controls order to the multinuclear multiline procedure processor.
The multinuclear multiline procedure processor carries out following processing after powering on: carry out initialization and load driver program by being used for the serial ports main kernel thread that serial ports interrupts articulating, enable serial ports and interrupt, set up shared drive, initialization is based on the Shell program of serial ports; Be each kernel thread distributing independent data buffer of moving in the polycaryon processor, the serial ports control information of in shared drive, setting up each kernel thread; The serial ports main kernel thread sends the serial ports initialization to each kernel thread and finishes message, and the serial ports initialization is finished message and comprised the address of serial ports control information in shared drive; And allowing to use under the situation of serial ports, the data that each kernel thread will need to send are put into the data buffer of distribution and notification message are sent to the serial ports main kernel thread, and the serial ports main kernel thread sends to outside with the data in the data buffer by serial ports according to notification message.
The multinuclear multiline procedure processor carries out following processing after receiving switching controls message: the serial ports main kernel thread initiates to switch the serial ports flow process, forbid that current serial ports interrupts and unloading serial port drive program, simultaneously serial ports is interrupted being articulated to the purpose kernel thread that need switch to and sending the serial ports handoff notification message to the purpose kernel thread; The purpose kernel thread carries out initialization and load driver program as the serial ports main kernel thread, enabling serial ports interrupts, set up shared drive, initialization is based on the Shell program of serial ports, serial ports main kernel thread in the shared drive number is revised as the thread number of purpose kernel thread, and message is finished in initialization be sent to all kernel threads, other kernel threads carry out subsequent treatment with the purpose kernel thread as the serial ports main kernel thread.
According to another aspect of the present invention, a kind of serial port multiplexing method that is used for polycaryon processor is provided, this method may further comprise the steps: step S202, after polycaryon processor powers on, carry out initialization and load driver program by being used for the serial ports main kernel thread that serial ports interrupts articulating, enabling serial ports interrupts, set up shared drive, initialization is based on the Shell program of serial ports, be each kernel thread distributing independent data buffer of moving in the polycaryon processor, and the serial ports control information of in shared drive, setting up each kernel thread; Step S204, the serial ports main kernel thread sends the serial ports initialization to each kernel thread and finishes message, and the serial ports initialization is finished message and is comprised the address of serial ports control information in shared drive; Step S206, allowing to use under the situation of serial ports, the data that each kernel thread will need to send are put into the data buffer of distribution and notification message are sent to the serial ports main kernel thread, and the serial ports main kernel thread sends to outside with the data in the data buffer by serial ports according to notification message; Step S208, switch at needs under the situation of kernel thread, the serial ports main kernel thread initiates to switch the serial ports flow process, forbid that current serial ports interrupts and unloading serial port drive program, simultaneously serial ports is interrupted being articulated to the purpose kernel thread that need switch to and sending the serial ports handoff notification message to the purpose kernel thread; And step S210, the purpose kernel thread carries out initialization and load driver program as the serial ports main kernel thread, enabling serial ports interrupts, set up shared drive, initialization is based on the Shell program of serial ports, serial ports main kernel thread in the shared drive number is revised as the thread number of purpose kernel thread, and message is finished in initialization is sent to all kernel threads, other kernel threads carry out subsequent treatment with the purpose kernel thread as the serial ports main kernel thread.
The switching controls module regularly sends switching controls message to the multinuclear multiline procedure processor.The switching controls module provides the operation information of each kernel thread to the user, indicates the user under the situation of switching the serial ports main kernel thread, and the switching controls module sends the switching controls order to the multinuclear multiline procedure processor.
In the present invention, the shared serial ports of at least one kernel thread in the polycaryon processor can be used for printing.
By implementing the present invention, a plurality of kernel threads can be saved hardware resource and cost by the software control multiplexing serial port, have improved the utilization factor of serial ports; Kernel thread message communication bandwidth has been saved in other control of type information level, simultaneously by the switching of serial ports interruption on each kernel thread, and the Shell program of using kernel thread operation system to carry, the exploitation that greatly facilitates software is debugged.
Other features and advantages of the present invention will be set forth in the following description, and, partly from instructions, become apparent, perhaps understand by implementing the present invention.Purpose of the present invention and other advantages can realize and obtain by specifically noted structure in the instructions of being write, claims and accompanying drawing.
Description of drawings
Accompanying drawing described herein is used to provide further understanding of the present invention, constitute the application's a part, illustrative examples of the present invention and explanation thereof are used to explain the present invention, do not constitute improper qualification of the present invention, and reference number identical in the accompanying drawing is represented components identical.In the accompanying drawings:
Figure 1A and Figure 1B illustrate the structural representation that existing serial ports is used respectively;
Fig. 2 is the block diagram that illustrates according to polycaryon processor of the present invention;
Fig. 3 is the process flow diagram that illustrates according to the serial port multiplexing method of polycaryon processor of the present invention;
Fig. 4 illustrates the process flow diagram of the serial port multiplexing method of polycaryon processor according to an embodiment of the invention;
Fig. 5 illustrates the synoptic diagram of multiplexing serial port method in accordance with another embodiment of the present invention; And
Fig. 6 is the software flow pattern according to the multiplexing serial port method of the embodiment of the invention.
Embodiment
Below with reference to accompanying drawing, describe the specific embodiment of the present invention in detail.
Fig. 2 is the block diagram that illustrates according to polycaryon processor of the present invention.With reference to Fig. 2, polycaryon processor 200 according to the present invention comprises: multinuclear multiline procedure processor 202 is used to move at least one kernel thread, and after receiving the switching controls message of switching controls module, carries out the switching of serial ports between kernel thread; Serial ports 204 is used for the data of at least one kernel thread of multinuclear multiline procedure processor are sent to the outside, and be used for the serial ports main kernel thread that serial ports interrupts articulating and carry out data interaction; And switching controls module 206, being connected between serial ports and the multinuclear multiline procedure processor, the switching of one or more kernel threads that is used for controlling the multinuclear multiline procedure processor is to share serial ports.
Switching controls module 206 regularly sends switching controls message to the multinuclear multiline procedure processor, the operation information of each kernel thread is provided to the user, and indicate the user under the situation of switching serial ports main kernel thread, the switching controls module sends the switching controls order to the multinuclear multiline procedure processor.
Multinuclear multiline procedure processor 202 carries out following processing after powering on: carry out initialization and load driver program by being used for the serial ports main kernel thread that serial ports interrupts articulating, enable serial ports and interrupt, set up shared drive, initialization is based on the Shell program of serial ports; Be each kernel thread distributing independent data buffer of moving in the polycaryon processor, the serial ports control information of in shared drive, setting up each kernel thread; The serial ports main kernel thread sends the serial ports initialization to each kernel thread and finishes message, and the serial ports initialization is finished message and comprised the address of serial ports control information in shared drive; And allowing to use under the situation of serial ports, the data that each kernel thread will need to send are put into the data buffer of distribution and notification message are sent to the serial ports main kernel thread, and the serial ports main kernel thread sends to outside with the data in the data buffer by serial ports according to notification message.
Multinuclear multiline procedure processor 202 carries out following processing after receiving switching controls message: the serial ports main kernel thread initiates to switch the serial ports flow process, forbid that current serial ports interrupts and unloading serial port drive program, simultaneously serial ports is interrupted being articulated to the purpose kernel thread that need switch to and sending the serial ports handoff notification message to the purpose kernel thread; The purpose kernel thread carries out initialization and load driver program as the serial ports main kernel thread, enabling serial ports interrupts, set up shared drive, initialization is based on the Shell program of serial ports, serial ports main kernel thread in the shared drive number is revised as the thread number of purpose kernel thread, and message is finished in initialization be sent to all kernel threads, other kernel threads carry out subsequent treatment with the purpose kernel thread as the serial ports main kernel thread.
In this device, one or more kernel threads of multinuclear multiline procedure processor are shared serial ports and are printed.
Fig. 3 is the process flow diagram that illustrates according to the serial port multiplexing method of polycaryon processor of the present invention.With reference to Fig. 3, serial port multiplexing method according to polycaryon processor of the present invention may further comprise the steps: step S302, after polycaryon processor powers on, carry out initialization and load driver program by being used for the serial ports main kernel thread that serial ports interrupts articulating, enable serial ports and interrupt, set up shared drive, initialization is based on the Shell program of serial ports, be each kernel thread distributing independent data buffer of moving in the polycaryon processor, and the serial ports control information of in shared drive, setting up each kernel thread; Step S304, the serial ports main kernel thread sends the serial ports initialization to each kernel thread and finishes message, and the serial ports initialization is finished message and is comprised the address of serial ports control information in shared drive; Step S306, allowing to use under the situation of serial ports, the data that each kernel thread will need to send are put into the data buffer of distribution and notification message are sent to the serial ports main kernel thread, and the serial ports main kernel thread sends to outside with the data in the data buffer by serial ports according to notification message; Step S308, switch at needs under the situation of kernel thread, the serial ports main kernel thread initiates to switch the serial ports flow process, forbid that current serial ports interrupts and unloading serial port drive program, simultaneously serial ports is interrupted being articulated to the purpose kernel thread that need switch to and sending the serial ports handoff notification message to the purpose kernel thread; And step 310, the purpose kernel thread carries out initialization and load driver program as the serial ports main kernel thread, enabling serial ports interrupts, set up shared drive, initialization is based on the Shell program of serial ports, serial ports main kernel thread in the shared drive number is revised as the thread number of purpose kernel thread, and message is finished in initialization is sent to all kernel threads, other kernel threads carry out subsequent treatment with the purpose kernel thread as the serial ports main kernel thread.
In the method, the switching controls module regularly sends switching controls message to the multinuclear multiline procedure processor, provide the operation information of each kernel thread to the user, and indicate the user under the situation of switching serial ports main kernel thread, send the switching controls order to the multinuclear multiline procedure processor.
In the method, the shared serial ports of at least one kernel thread in the polycaryon processor prints.
Describe embodiments of the invention in detail below in conjunction with Fig. 4～Fig. 6.
Fig. 4 illustrates the process flow diagram of the serial port multiplexing method of polycaryon processor according to an embodiment of the invention.With reference to Fig. 4, the serial port multiplexing method of polycaryon processor may further comprise the steps according to an embodiment of the invention:
Step S402, after powering on, the kernel thread that serial ports interrupts articulating is called the serial ports main kernel thread, finishes the loading of serial port chip initialization, serial port drive by the serial ports main kernel thread, opens the serial ports interrupt mask bit in the interruptable controller, enables serial ports and interrupts; Initialization is set up shared drive based on the Shell of serial ports, is each kernel thread distributing independent print buffer;
Step S404, the serial ports main kernel thread is set up the serial ports control information of each kernel thread in shared drive, comprise that print buffer start address, buffer size, permission print rank, serial ports main kernel thread number;
Step S406, the serial ports main kernel thread sends the serial ports initialization to each other kernel thread and finishes message, and this message is included in the address of serial ports control information in the shared drive;
Step S408, after each kernel thread receives that message is finished in the serial ports initialization, whether the value of judging current printing grade variable is complementary with the rank that allows type information, if coupling then type information is left in the print buffer that shared drive distributed, send message informing serial ports main kernel thread simultaneously, carry the address of printmessage in shared drive in the message; The serial ports main kernel thread goes out address and length according to the message parse of receiving, and the character string in this address is sent to serially printing;
Step S410, according to the debugging needs, initiate to switch the serial ports flow process by the serial ports main kernel thread, the serial ports main kernel thread forbids that current serial ports interrupts, unloading serial port drive program, simultaneously serial ports is interrupted being articulated to the purpose kernel thread that need switch to, and transmission message informing purpose kernel thread begins to switch serial ports;
After step S412, purpose kernel thread received that the beginning serial ports switches message, initialization serial ports chip loaded serial port drive, opens the serial ports interrupt mask bit in the interruptable controller, enabled serial ports and interrupted; Initialization is based on the Shell of serial ports; This moment, the purpose kernel thread became the serial ports main kernel thread of control serial ports;
Step S414 revises the serial ports main kernel thread number in the shared drive, sends all kernel thread initialization of message informing and finishes message; And
Step S416, other each kernel threads send to new serial ports main kernel thread with type information, handle the printmessage that other each threads send by current serial ports main kernel thread.
The existing serial ports method of using comprises multinuclear multiline procedure processor 100, serial ports 120, kernel thread 101 shown in Figure 1A.Serial ports 120 is articulated on the kernel thread 101, other kernel threads are shared by the inter-core message of kernel thread and are used this serial ports 120, though this mode has been saved serial ports 120, if but more Debugging message is arranged by the inter-core message transmission for other kernel threads, can take more inter-core message communication bandwidth, can not directly use the Shell program that operating system carries on this kernel thread when debugging for single kernel thread simultaneously, can bring very big inconvenience to the software development debugging.
Have now and use the serial ports method shown in Figure 1B, make by the number of expanding serial ports 120 and clearly when on the shelf, can cause the waste of serial ports 120 resources by each serial ports 120 corresponding kernel thread 101.
Fig. 5 is a multiplexing serial port method synoptic diagram of the present invention, comparing with preceding method has increased switching controls module 510, the switching controls module operates in each kernel thread 101, can use for the kernel thread 101 of appointment by the software control serial ports, other kernel threads write shared drive with printmessage, kernel thread by current control serial ports is responsible for reception, can use the kernel thread of the current appointment of AccessPort easily as required, not influence the type information passage of other kernel threads simultaneously.
Fig. 6 is the software flow pattern according to the multiplexing serial port method of the embodiment of the invention.With reference to Fig. 6, may further comprise the steps according to the software flow of the multiplexing serial port method of the embodiment of the invention:
Step S602, system powers on;
Step S604 finishes the loading of serial port chip initialization, serial port drive by the serial ports main kernel thread, opens the serial ports interrupt mask bit in the interruptable controller, enables serial ports and interrupts;
Step S606, initialization is set up shared drive based on the Shell of serial ports, is each kernel thread distributing independent print buffer;
Step S608, the serial ports main kernel thread is set up the serial ports control information of each kernel thread in shared drive;
Step S610 judges whether to switching serial ports message;
Step S612, if printmessage, the serial ports main kernel thread goes out address and length according to the message parse of receiving, and the character string in this address is sent to serially printing;
Step S614, if switch serial ports message, the serial ports main kernel thread forbids that current serial ports interrupts unloading serial port drive program, interrupts being articulated to the purpose kernel thread that need switch to serial ports;
Step S616, serial ports main kernel thread notice purpose kernel thread begins to switch serial ports;
Step S618, purpose kernel thread initialization serial ports chip loads serial port drive, enables serial ports and interrupts initialization Shell; And
Step S620 revises in the shared drive serial ports main kernel thread number.
Adopt the method for the invention, compared with prior art, a plurality of kernel threads can be saved hardware resource and cost by the software control multiplexing serial port, have improved the utilization factor of serial ports; Kernel thread message communication bandwidth has been saved in other control of type information level, simultaneously by the switching of serial ports interruption on each kernel thread, and the shell program of using kernel thread operation system to carry, the exploitation that greatly facilitates software is debugged.
The above is the preferred embodiments of the present invention only, is not limited to the present invention, and for a person skilled in the art, the present invention can have various changes and variation.Within the spirit and principles in the present invention all, any modification of being done, be equal to replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (10)
1. a polycaryon processor is characterized in that, comprises multinuclear multiline procedure processor, serial ports and switching controls module, wherein:
Described multinuclear multiline procedure processor is used to move at least one kernel thread, and after receiving the switching controls message of described switching controls module, carries out the switching of described serial ports between kernel thread;
Described serial ports is used for the data of described at least one kernel thread of described multinuclear multiline procedure processor are sent to the outside, and be used for the serial ports main kernel thread that serial ports interrupts articulating and carry out data interaction; And
Described switching controls module is connected between described serial ports and the described multinuclear multiline procedure processor, and the switching of described one or more kernel threads that is used for controlling described multinuclear multiline procedure processor is to share described serial ports.
2. polycaryon processor according to claim 1 is characterized in that, described switching controls module regularly sends described switching controls message to described multinuclear multiline procedure processor.
3. polycaryon processor according to claim 1, it is characterized in that, described switching controls module provides the operation information of described each kernel thread to the user, indicate under the situation of switching described serial ports main kernel thread the user, described switching controls module sends described switching controls order to described multinuclear multiline procedure processor.
4. according to claim 2 or 3 described polycaryon processors, it is characterized in that described multinuclear multiline procedure processor carries out following processing after powering on:
Carry out initialization and load driver program by described serial ports main kernel thread, enable serial ports and interrupt, set up shared drive, initialization is based on the Shell program of serial ports;
Be each kernel thread distributing independent data buffer of moving in the described polycaryon processor, the serial ports control information of in described shared drive, setting up each kernel thread;
Described serial ports main kernel thread sends the serial ports initialization to described each kernel thread and finishes message, and described serial ports initialization is finished message and comprised the address of serial ports control information in described shared drive; And
Allowing to use under the situation of described serial ports, the data that described each kernel thread will need to send are put into the data buffer of distribution and notification message are sent to described serial ports main kernel thread, and described serial ports main kernel thread sends to outside with the data in the described data buffer by described serial ports according to described notification message.
5. polycaryon processor according to claim 4 is characterized in that, described multinuclear multiline procedure processor carries out following processing after receiving described switching controls message:
Described serial ports main kernel thread is initiated to switch the serial ports flow process, forbids that current serial ports interrupts and unloading serial port drive program, simultaneously serial ports is interrupted being articulated to the purpose kernel thread that need switch to and sends the serial ports handoff notification message to described purpose kernel thread;
Described purpose kernel thread carries out initialization and load driver program as the serial ports main kernel thread, enabling serial ports interrupts, set up shared drive, initialization is based on the Shell program of serial ports, serial ports main kernel thread in the described shared drive number is revised as the thread number of described purpose kernel thread, and message is finished in initialization be sent to all kernel threads, described other kernel threads carry out subsequent treatment with described purpose kernel thread as the serial ports main kernel thread.
6. polycaryon processor according to claim 5 is characterized in that, one or more kernel threads of described multinuclear multiline procedure processor are shared described serial ports and printed.
7. a serial port multiplexing method that is used for polycaryon processor is characterized in that, said method comprising the steps of:
Step 1, after polycaryon processor powers on, carry out initialization and load driver program by being used for the serial ports main kernel thread that serial ports interrupts articulating, enabling serial ports interrupts, build shared drive, initialization is each kernel thread distributing independent data buffer of moving in the described polycaryon processor based on the Shell program of serial ports, and the serial ports control information of setting up each kernel thread in described shared drive;
Step 2, described serial ports main kernel thread sends the serial ports initialization to described each kernel thread and finishes message, and described serial ports initialization is finished message and is comprised the address of serial ports control information in described shared drive;
Step 3, allowing to use under the situation of described serial ports, the data that described each kernel thread will need to send are put into the data buffer of distribution and notification message are sent to described serial ports main kernel thread, and described serial ports main kernel thread sends to outside with the data in the described data buffer by described serial ports according to described notification message;
Step 4, switch at needs under the situation of described kernel thread, described serial ports main kernel thread initiates to switch the serial ports flow process, forbid that current serial ports interrupts and unloading serial port drive program, simultaneously serial ports is interrupted being articulated to the purpose kernel thread that need switch to and send the serial ports handoff notification message to described purpose kernel thread;
Step 5, described purpose kernel thread carries out initialization and load driver program as the serial ports main kernel thread, enabling serial ports interrupts, set up shared drive, initialization is based on the Shell program of serial ports, serial ports main kernel thread in the described shared drive number is revised as the thread number of described purpose kernel thread, and message is finished in initialization is sent to all kernel threads, described other kernel threads carry out subsequent treatment with described purpose kernel thread as the serial ports main kernel thread.
8. polycaryon processor according to claim 7 is characterized in that, described switching controls module regularly sends described switching controls message to described multinuclear multiline procedure processor.
9. polycaryon processor according to claim 7, it is characterized in that, described switching controls module provides the operation information of described each kernel thread to the user, indicate under the situation of switching described serial ports main kernel thread the user, described switching controls module sends described switching controls order to described multinuclear multiline procedure processor.
10. according to each described serial port multiplexing method in the claim 7 to 9, it is characterized in that at least one kernel thread in the described polycaryon processor is shared described serial ports and printed.
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