阅读说明：本技术 一种处理系统以及一种片上系统 (Processing system and system on chip ) 是由 王金富 王凛 于 2021-02-08 设计创作，主要内容包括：本申请公开了一种片上系统,包括：N个子系统,N为正整数,与N个子系统均连接的根控制单元；根控制单元包括：命令生成器,用于在接收到任一子系统发送的状态信号之后,按照命令生成器中的寄存器配置,输出对应于状态信号的各条命令至命令缓冲器的命令队列中；命令缓冲器；命令发送状态器,用于从命令缓冲器的命令队列中顺序读取命令,并且读取了任意一条命令之后,将读取的该条命令发送至对应于该条命令的子系统的枝控制单元中以进行该命令的执行。应用本申请的方案,有效地提高了片上系统的效率,且提高了任务耗时的稳定性。本申请还提供了一种处理系统,具有相应技术效果。(The application discloses system on a chip includes: n subsystems, wherein N is a positive integer, and the N subsystems are connected with a root control unit; the root control unit includes: the command generator is used for outputting each command corresponding to the status signal to a command queue of the command buffer according to the register configuration in the command generator after receiving the status signal sent by any subsystem; a command buffer; and the command sending state device is used for sequentially reading commands from the command queue of the command buffer, and sending the read command to the branch control unit of the subsystem corresponding to the command to execute the command after reading any command. By the scheme, the efficiency of the system on chip is effectively improved, and the time-consuming stability of the task is improved. The application also provides a processing system which has corresponding technical effects.)

1. A system on a chip, comprising:

n subsystems, wherein N is a positive integer, and the N subsystems are connected with a root control unit;

the root control unit includes:

the command generator is used for outputting each command corresponding to the status signal to a command queue of a command buffer according to the register configuration in the command generator after receiving the status signal sent by any subsystem;

the command buffer;

and the command sending state device is used for sequentially reading commands from the command queue of the command buffer, and sending the read command to the branch control unit of the subsystem corresponding to the command to execute the command after reading any command.

2. The system on chip of claim 1, wherein the command generator generates a command that carries at least a number of a branch control unit and field information of a branch control unit execution command; each subsystem is provided with 1 branch control unit with different numbers;

the command sending state machine is specifically configured to: and sequentially reading commands from the command queue of the command buffer, and after any command is read, sending the command to the branch control unit of the subsystem with the same number as that of the command according to the number of the branch control unit in the read command so as to execute the command.

3. The system on a chip of claim 1, wherein the root control unit further comprises:

a first configuration interface connected with a register in the command generator and the command buffer, to receive a first configuration adjustment instruction to adjust a configuration of the register in the command generator, and to receive a debug command to output the debug command into a command queue of the command buffer.

4. The system on a chip of claim 3, wherein the first configuration interface is a first AHB configuration interface.

5. The system on chip of claim 1, wherein each subsystem comprises 1 branch control unit and a plurality of leaf control units;

the branch control unit in each subsystem comprises:

the command receiver is used for judging whether the received command is a state inquiry command or not, and if so, reading a state value in the command receiver and feeding back the state value to the root control unit; if not, sending the received command to a command analysis scheduler;

the command analysis scheduler is used for splitting the received command according to the register configuration in the command analysis scheduler when the command is received, and sequentially sending the split command to the corresponding command executer according to the execution time sequence;

and each command executor is used for controlling a leaf control unit connected with the command executor to execute the received command when receiving the command sent by the command parsing scheduler, and returning prompt information indicating that the command is successfully executed to the command parsing scheduler after the command is successfully executed.

6. The system on a chip of claim 5, wherein the command resolution scheduler is further configured to:

the split commands are sequentially sent to corresponding command executors according to an execution time sequence, and after each split command is successfully executed, first information is returned to a command receiver;

the command receiver is further configured to: after the received command is sent to a command analysis scheduler, before the first information is received, setting a state identifier as a non-idle state, and after the first information is received, before a command newly sent by the root control unit is not received, setting the state identifier as an idle state;

the command sending state device is further configured to, when sending any command, determine whether the branch control unit of the subsystem corresponding to the command is in an idle state, if so, send the command, and otherwise, suspend sending the command.

7. The system on a chip of claim 5, further comprising in the branch control unit:

a second configuration interface, connected to the register in the command parsing scheduler, configured to receive a second configuration adjustment instruction to adjust a configuration of the register in the command parsing scheduler.

8. The system on a chip of claim 7, wherein the second configuration interface is a second AHB configuration interface.

9. The system on chip of claim 5, wherein each subsystem comprises at least:

a clock leaf control unit for performing clock control;

a reset leaf control unit for performing reset control;

and the power leaf control unit is used for controlling the power.

10. The system on chip of any one of claims 1 to 9, wherein the command generator is a command generator comprising M command generating circuits, each command generating circuit being connected to a corresponding subsystem, so that the command generator simultaneously processes M status signals when receiving status signals sent by M subsystems, where M is a positive integer.

11. A processing system comprising a system on chip as claimed in any one of claims 1 to 10.

Technical Field

The present invention relates to the field of computer technologies, and in particular, to a processing system and a system on a chip.

Background

The current development of SoC (System on Chip) has shown the trend of more and more complex design function, larger and more design scale, and smaller and more Chip manufacturing process size, and the demands for high performance, low power consumption, multiple application scenarios, etc. of the Chip are also higher and higher. The requirement of high performance means that the internal operating frequency of the chip is higher and higher, and the requirement of low Power consumption means that a low Power consumption design method is adopted as much as possible when the chip is designed, for example, the chip is logically divided into Power domains of which the Power supplies can be independently turned on or off, a Clock Gating unit is adopted to control a Clock switch, a plurality of Power supplies are adopted, and the values of the Power supplies are dynamically adjustable, and the like. In the multi-application scenario, according to each application condition of the chip, a corresponding clock switch state and running frequency, a corresponding power domain switch state, each power supply value and the like are defined, so that power consumption and performance are optimized on the premise of meeting the requirements of the application scenario. In the SoC, a circuit for implementing the above functions is called an SCU (System Control Unit), and generally includes three parts: a CCU (Clock Control Unit), an RCU (Reset Control Unit), and a PCU (Power Control Unit), and sometimes each part needs to cooperate to perform a certain function.

Fig. 1 illustrates a method for implementing a control unit of a conventional SoC system, where the structures of the subsystems are the same, and only the structure of the subsystem 1 is shown. Taking the system control unit of the subsystem 1 as an example, the working flow is as follows: 1. the subsystem 1 completes a certain work task and sends an interrupt or state signal [ M-1:0] with the bit width of M to the interrupt processing unit. 2. The interrupt processing unit sends an interrupt signal to the CPU according to the priority. 3. The CPU responds to the interrupt request to obtain the current state of the subsystem 1 and determine its next course of action. 4. The CPU sends a control command to the on-chip interconnection module from the interface 2 port through the AHB/AXI, and the command is transmitted to an AHB interface of a system control unit of the subsystem 1 through a bus arbiter 1 port of the on-chip interconnection module and an AHB main interface 1 port of the on-chip interconnection module. And finally, after the AHB interface of the system control unit of the subsystem 1 processes the control command, the clock frequency of the clock control unit, the logic reset of the reset control unit or the setting of the power domain, the gating clock, the power supply value and the like of the power supply control unit are realized through the register read-write signal.

The SoC system of fig. 1 is composed of a hardware part and a software part. In the above process, the CPU needs a certain time to execute the software program so as to determine and process the interrupt signal, and obtain the next action scheme of the subsystem. And the time for transmitting the on-chip interconnection module control command is uncertain. In addition, since the on-chip interconnect module is connected to multiple CPUs, it is possible to receive accesses of multiple "AHB/AXI slave interfaces" at the same time, so that the command transmission time from "AHB/AXI slave interface 2" to "AHB master interface 1" in the above process is long and has a great uncertainty. Based on the reasons, the current SoC system has the problems of low efficiency and instable time consumption for executing tasks.

In summary, how to effectively improve the efficiency of the system on chip and improve the time-consuming stability of tasks is a technical problem that needs to be solved by those skilled in the art.

Disclosure of Invention

The invention aims to provide a processing system and a system on a chip, so as to effectively improve the efficiency of the system on the chip and improve the time-consuming stability of tasks.

In order to solve the technical problems, the invention provides the following technical scheme:

a system on a chip, comprising:

n subsystems, wherein N is a positive integer, and the N subsystems are connected with a root control unit;

the root control unit includes:

the command generator is used for outputting each command corresponding to the status signal to a command queue of a command buffer according to the register configuration in the command generator after receiving the status signal sent by any subsystem;

the command buffer;

and the command sending state device is used for sequentially reading commands from the command queue of the command buffer, and sending the read command to the branch control unit of the subsystem corresponding to the command to execute the command after reading any command.

Preferably, the command generated by the command generator at least carries the number of the branch control unit and the field information of the branch control unit executing the command; each subsystem is provided with 1 branch control unit with different numbers;

the command sending state machine is specifically configured to: and sequentially reading commands from the command queue of the command buffer, and after any command is read, sending the command to the branch control unit of the subsystem with the same number as that of the command according to the number of the branch control unit in the read command so as to execute the command.

Preferably, the root control unit further includes:

a first configuration interface connected with a register in the command generator and the command buffer, to receive a first configuration adjustment instruction to adjust a configuration of the register in the command generator, and to receive a debug command to output the debug command into a command queue of the command buffer.

Preferably, the first configuration interface is a first AHB configuration interface.

Preferably, each subsystem comprises 1 branch control unit and a plurality of leaf control units;

the branch control unit in each subsystem comprises:

the command receiver is used for judging whether the received command is a state inquiry command or not, and if so, reading a state value in the command receiver and feeding back the state value to the root control unit; if not, sending the received command to a command analysis scheduler;

the command analysis scheduler is used for splitting the received command according to the register configuration in the command analysis scheduler when the command is received, and sequentially sending the split command to the corresponding command executer according to the execution time sequence;

and each command executor is used for controlling a leaf control unit connected with the command executor to execute the received command when receiving the command sent by the command parsing scheduler, and returning prompt information indicating that the command is successfully executed to the command parsing scheduler after the command is successfully executed.

Preferably, the command resolution scheduler is further configured to:

the split commands are sequentially sent to corresponding command executors according to an execution time sequence, and after each split command is successfully executed, first information is returned to a command receiver;

the command receiver is further configured to: after the received command is sent to a command analysis scheduler, before the first information is received, setting a state identifier as a non-idle state, and after the first information is received, before a command newly sent by the root control unit is not received, setting the state identifier as an idle state;

the command sending state device is further configured to, when sending any command, determine whether the branch control unit of the subsystem corresponding to the command is in an idle state, if so, send the command, and otherwise, suspend sending the command.

Preferably, the branch control unit further includes:

a second configuration interface, connected to the register in the command parsing scheduler, configured to receive a second configuration adjustment instruction to adjust a configuration of the register in the command parsing scheduler.

Preferably, the second configuration interface is a second AHB configuration interface.

Preferably, each subsystem includes at least:

a clock leaf control unit for performing clock control;

a reset leaf control unit for performing reset control;

and the power leaf control unit is used for controlling the power.

Preferably, the command generator is a command generator including M command generating circuits, each command generating circuit is connected to a corresponding subsystem, so that when the command generator receives status signals sent by M subsystems at the same time, the command generator processes the M status signals at the same time, where M is a positive integer.

A processing system comprising the system-on-chip of any of the above.

By applying the technical scheme provided by the embodiment of the invention, the system on chip is realized based on a full hardware mode. Specifically, the method does not need a CPU (central processing unit) to participate, but sets root control units connected with N subsystems, wherein a command generator in each root control unit is used for generating commands, and specifically, after receiving a state signal sent by any subsystem, the command generator outputs each command corresponding to the state signal to a command queue of a command buffer according to register configuration in the command generator. The command sending state device can read the commands from the command queue of the command buffer in sequence, and after any command is read, the read command is sent to the branch control unit of the subsystem corresponding to the command to execute the command. It can be seen that, in the scheme of the application, a traditional on-chip interconnection module is not needed, and the read command is directly sent to the branch control unit of the subsystem corresponding to the command by the command sending state machine, so that the problems of long transmission time and great uncertainty caused by the link of the on-chip interconnection module in the traditional scheme can be solved. To sum up, the scheme of the application effectively improves the efficiency of the system on chip and improves the time-consuming stability of the task.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.

Fig. 1 is a schematic diagram illustrating an implementation of a control unit of a SoC system;

FIG. 2 is a schematic diagram of a system-on-chip according to the present invention;

FIG. 3 is a block diagram of a system on a chip according to an embodiment of the invention.

Detailed Description

The core of the invention is to provide the system on chip, which effectively improves the efficiency of the system on chip and improves the time-consuming stability of tasks.

In order that those skilled in the art will better understand the disclosure, the invention will be described in further detail with reference to the accompanying drawings and specific embodiments. It is to be understood that the described embodiments are merely exemplary of the invention, and not restrictive of the full scope of the invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Referring to fig. 2, fig. 2 is a schematic structural diagram of a system on chip according to the present invention, where the system on chip may include:

n subsystems 200, where N is a positive integer, and a root control unit 100 connected to each of the N subsystems 200;

the root control unit 100 includes:

a command generator 110, configured to output each command corresponding to the status signal to a command queue of the command buffer 120 according to a register configuration in the command generator 110 after receiving the status signal sent by any subsystem 200;

a command buffer 120;

the command sending state machine 130 is configured to sequentially read commands from the command queue of the command buffer 120, and after any one of the commands is read, send the read command to the branch control unit 210 of the subsystem 200 corresponding to the command to execute the command.

The specific number of subsystems 200 and the specific function of each subsystem 200 can be set and adjusted according to actual needs, the root control unit 100 is connected to each of the N subsystems 200, and can receive the status signals sent by the subsystems 200, and it is emphasized that the function of the interrupt signal can be covered by the status signals, that is, the interrupt signal can be one type of the status signals described in the embodiments of the present application.

After receiving the status signal sent by any subsystem 200, the command generator 110 outputs each command corresponding to the status signal to the command queue of the command buffer 120 according to the register configuration in the command generator 110. It will be appreciated that the content of the status signal is different and the commands generated are different.

It should be noted that, when receiving the status signal sent by one of the subsystems 200, the command generator 110 may generate 1 command, or may generate a plurality of commands, for example, when receiving the status signal a sent by the subsystem 1, 1 command a is generated, which needs to be executed by the subsystem 1, for example, when receiving the status signal B sent by the subsystem 1, a command B and a command C are generated and executed by the subsystem 1 and the subsystem 4, respectively. Further, in practical applications, when a corresponding command is generated based on a received status signal, the command is typically executed by the subsystem 200 that transmitted the status signal, and when a plurality of corresponding commands are generated, a command is typically executed by each of the plurality of subsystems 200 including the subsystem 200 that transmitted the status signal.

The present application performs buffering of commands by the command buffer 120, considering that the command generator 110 continuously outputs commands.

The command transmitting state machine 130 may sequentially read commands from the command queue of the command buffer 120, and after reading any one of the commands, transmit the read command to the branch control unit 210 of the subsystem 200 corresponding to the command for execution of the command.

It is understood that for any command, the command should carry information of the subsystem 200 executing the command, so that the command sending state machine 130 can know to which subsystem 200 the command should be sent to execute.

For example, in an embodiment of the present invention, the command generator 110 generates a command, which carries at least the number of the branch control unit and field information of the branch control unit executing the command; each subsystem 200 has 1 branch control unit 210, and the numbers are different;

the command sending state machine 130 is specifically configured to: the commands are sequentially read from the command queue of the command buffer 120, and after any one command is read, the command is sent to the branch control unit 210 of the subsystem 200 with the same number as that of the command according to the number of the branch control unit 210 in the read command to execute the command.

In this embodiment, the format of the command is defined as:

the target branch control unit is the branch control unit corresponding to the command, and the number of the target branch control unit indicates that the command should be sent to the branch control unit with the number for execution. It should be noted that the definition of the field information of the command executed by each branch control unit may be different according to the specific function of each subsystem 200.

For example, for subsystem 1, the field information of the command executed by the target branch control unit is 0: and inquiring the state of the subsystem 1 branch control unit. The field information of the command executed by the target branch control unit is 1: the subsystem 1 enters a power-off state. The field information of the command executed by the target branch control unit is 2: the subsystem 1 enters a sleep state.

For the subsystem 2, for example, the field information of the command executed by the target branch control unit is 0: the clock of the subsystem 2 is lowered in frequency to the operating mode 2. The field information of the command executed by the target branch control unit is 1: subsystem 2 is clocked up to frequency to operating mode 1. The field information of the command executed by the target branch control unit is 2: the main functional circuitry of the subsystem 2 is reset.

Further, referring to fig. 3, in an embodiment of the present invention, the root control unit 100 may further include:

a first configuration interface connected to the registers in the command generator 110 and the command buffer 120, for receiving a first configuration adjustment instruction to adjust the configuration of the registers in the command generator 110, and for receiving a debug command to output the debug command into a command queue of the command buffer 120.

The first configuration interface interfaces with registers in the command generator 110 so that a worker can adjust the configuration of the registers in the command generator 110 through the first configuration adjustment instruction. Meanwhile, the first configuration interface is connected to the command buffer 120, so that a worker can directly send a debug command to the command buffer 120, thereby facilitating debugging of the system on chip.

The specific type of the first configuration interface may be set according to actual needs, for example, in the embodiment of fig. 3 of the present application, the first configuration interface is specifically selected as the first AHB configuration interface.

The specific configuration of each subsystem 200 can be set and adjusted according to actual needs, and in a specific embodiment of the present invention, each subsystem 200 includes 1 branch control unit 210 and a plurality of leaf control units, that is, the system control unit of each subsystem 200 includes 1 branch control unit 210 and a plurality of leaf control units. It is further noted that the number and function of leaf control units of different subsystems 200 may differ. In this embodiment of the present application, the branch control unit 210 and the leaf control unit in each subsystem 200 are implemented by full hardware, which ensures the efficiency of the system on chip and the stability of the task delay time.

Referring to fig. 3, the branch control unit 210 in each subsystem 200 includes:

a command receiver for judging whether the received command is a status inquiry command, and if so, reading a status value in the command receiver and feeding back to the root control unit 100; if not, sending the received command to a command analysis scheduler;

the command analysis scheduler is used for splitting the received command according to the register configuration in the command analysis scheduler when the command is received, and sequentially sending the split command to the corresponding command executer according to the execution time sequence;

and each command executor is used for controlling a leaf control unit connected with the command executor to execute the received command when receiving the command sent by the command parsing scheduler, and returning prompt information indicating that the command is successfully executed to the command parsing scheduler after the command is successfully executed.

Fig. 3 shows only the specific structure of the system control unit of the subsystem 1 in detail, including 1 branch control unit 210 and x leaf control units.

In this embodiment, when the command receiver determines that the received command is a status query command, the command receiver may directly read the status value in the command receiver and feed back the status value to the root control unit 100 without issuing the command, which is beneficial to improving the execution efficiency of the status query command.

If not, the command receiver needs to send the received command to a command resolution scheduler connected to itself.

Because the complexity of different commands is different and the number of leaf control units needing to participate in execution is possibly different, the method splits the received commands through the command parsing scheduler according to the register configuration in the command parsing scheduler, thereby refining the received commands to the extent that each leaf control unit can be operated

The operation leaf control unit is realized by command executors, each command executor can control the leaf control unit connected with the command executor to execute the received command when receiving the command sent by the command parsing scheduler, and after the command is successfully executed, prompt information indicating that the command is successfully executed is returned to the command parsing scheduler. Namely, the command executor converts the received command sent by the command analysis scheduler into a control/response signal with the leaf control unit.

For example, in a specific scenario, as described above, the field information of the command executed by the target branch control unit 210 is 1: the subsystem 1 enters a power-off state. The order of leaf control units that need to be operated is then:

command parsing scheduler sends a control signal to leaf control unit 2 (reset control) in fig. 3 using command executor 2 in fig. 3, so that subsystem 1 is reset;

a leaf control unit 2 (reset control) sends a completion signal to the command analysis scheduler through a command executor 2;

using the command executor x in fig. 3 to send a control signal to the leaf control unit x (power control) in fig. 3, so as to shut down the power supply of the corresponding logic circuit in the subsystem 1;

a leaf control unit x (power supply control) sends a completion signal to the command analysis scheduler through a command executor x;

the command analysis scheduler sends a control signal to a leaf control unit 1 (clock control) in the figure 3 by using a command executor 1 in the figure 3, and closes a subsystem 1 clock;

sixthly, the leaf control unit 1 (clock control) sends a completion signal to the command analysis scheduler by using the command executor 1;

and the command analysis scheduler returns all command execution completion signals to the command receiver.

In an embodiment of the present invention, each subsystem includes at least:

a clock leaf control unit for performing clock control;

a reset leaf control unit for performing reset control;

and the power leaf control unit is used for controlling the power.

As previously described, the number and function of leaf control units of different subsystems 200 may vary. In this embodiment, in consideration of the requirement of the clock control, the power control and the reset control of the general subsystems 200, a clock leaf control unit, a reset leaf control unit and a power leaf control unit are provided in each subsystem 200, and the clock control, the reset control and the power control of the subsystem 200 are respectively realized.

The clock control generally includes a clock frequency switching control and a clock switching control, the reset control may reset a global or partial circuit of the subsystem 200, and the power control controls a power domain, a clock gating component, a power supply voltage, and the like in the subsystem 200.

In an embodiment of the present invention, the command parsing scheduler may further be configured to:

the split commands are sequentially sent to corresponding command executors according to an execution time sequence, and after each split command is successfully executed, first information is returned to a command receiver;

a command receiver further for: after the received command is sent to the command parsing scheduler, before the first information is received, the state identifier is set to be in a non-idle state, and after the first information is received, before the command newly sent by the root control unit 100 is not received, the state identifier is set to be in an idle state;

the command sending stater 130 is further configured to, when sending any command, determine whether the branch control unit 210 of the subsystem 200 corresponding to the command is in an idle state, if so, send the command, and otherwise, suspend sending the command.

In this embodiment, when the command parsing scheduler is executing a command, the command receiver may set the status identifier of the branch control unit 210 of the subsystem 200 to be in a non-idle state, and correspondingly, when the command parsing scheduler finishes executing the command, the command receiver may set the status identifier of the branch control unit 210 of the subsystem 200 to be in an idle state, so that the command sending state machine 130 may issue the command only when the branch control unit 210 of the subsystem 200 is in the idle state, thereby avoiding an abnormal situation.

In an embodiment of the present invention, the branch control unit 210 further includes:

and the second configuration interface is connected with the register in the command analysis scheduler and used for receiving a second configuration adjusting instruction so as to adjust the configuration of the register in the command analysis scheduler.

Through the second configuration interface, the register in the command parsing scheduler may be configured and adjusted, for example, as described above, the field information for the target branch control unit to execute the command is 0: the clock of the subsystem 2 is lowered in frequency to the operating mode 2, specifically by how much hz, which can be determined by a register in the command resolution scheduler.

The specific type of second configuration interface may also be set and adjusted as desired, for example, the second AHB may be generally configured.

In addition, the root control unit 100 and the branch control units 210 may be connected via a bus, such as a serial bus, or a custom local bus.

In one embodiment of the present invention, the command generator 110 is a command generator 110 including M command generating circuits, each connected to a corresponding subsystem 200, so that the command generator 110 simultaneously processes M status signals when receiving the status signals sent by M subsystems 200, where M is a positive integer.

In this embodiment, considering that the command generator 110 may receive status signals sent by a plurality of subsystems 200 at the same time, if the processing is performed in sequence, the processing efficiency is high because the present application is implemented on the basis of hardware, but in some cases, when the number of subsystems 200 is particularly large or status signals are sent frequently, in order to further improve the efficiency, the command generator 110 of this embodiment is configured by M command generating circuits, so that the status signals sent by M subsystems 200 can be processed at most in parallel, thereby further improving the efficiency of the system on chip. The specific value of M can be set according to actual needs.

By applying the technical scheme provided by the embodiment of the invention, the system on chip is realized based on a full hardware mode. Specifically, the root control unit 100 connected to the N subsystems 200 is provided without CPU involvement, the command generator 110 in the root control unit 100 is configured to generate commands, and specifically, after receiving a status signal sent by any subsystem 200, the command generator 110 outputs each command corresponding to the status signal to the command queue of the command buffer 120 according to the register configuration in the command generator 110. The command transmitting state machine 130 may sequentially read commands from the command queue of the command buffer 120, and after reading any one of the commands, transmit the read command to the branch control unit 210 of the subsystem 200 corresponding to the command for execution of the command. It can be seen that, in the solution of the present application, a conventional on-chip interconnect module is not needed, and the command sending state machine 130 directly sends the read command to the branch control unit 210 of the subsystem 200 corresponding to the command, so that the problem that the transmission time is long and there is a great uncertainty caused by the link of the on-chip interconnect module in the conventional solution does not occur. To sum up, the scheme of the application effectively improves the efficiency of the system on chip and improves the time-consuming stability of the task.

Corresponding to the above embodiments of the system on chip, embodiments of the present invention further provide a processing system, which may include the system on chip in any of the above embodiments, where the processing system may be a processing system for performing video data processing, a processing system in a server, a computer, or the like, and may be referred to in correspondence with the above, and a description thereof is not repeated here.

It is further noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.

Those of skill would further appreciate that the various illustrative elements and algorithm steps described in connection with the embodiments disclosed herein may be implemented as electronic hardware, computer software, or combinations of both, and that the various illustrative components and steps have been described above generally in terms of their functionality in order to clearly illustrate this interchangeability of hardware and software. Whether such functionality is implemented as hardware or software depends upon the particular application and design constraints imposed on the implementation. Skilled artisans may implement the described functionality in varying ways for each particular application, but such implementation decisions should not be interpreted as causing a departure from the scope of the present invention.

The principle and the implementation of the present invention are explained in the present application by using specific examples, and the above description of the embodiments is only used to help understanding the technical solution and the core idea of the present invention. It should be noted that, for those skilled in the art, it is possible to make various improvements and modifications to the present invention without departing from the principle of the present invention, and those improvements and modifications also fall within the scope of the claims of the present invention.