CN109522194A - For AXI protocol from the automation pressure testing system and method for equipment interface - Google Patents
For AXI protocol from the automation pressure testing system and method for equipment interface Download PDFInfo
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- CN109522194A CN109522194A CN201811351732.XA CN201811351732A CN109522194A CN 109522194 A CN109522194 A CN 109522194A CN 201811351732 A CN201811351732 A CN 201811351732A CN 109522194 A CN109522194 A CN 109522194A
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F11/00—Error detection; Error correction; Monitoring
- G06F11/30—Monitoring
- G06F11/34—Recording or statistical evaluation of computer activity, e.g. of down time, of input/output operation ; Recording or statistical evaluation of user activity, e.g. usability assessment
- G06F11/3457—Performance evaluation by simulation
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F11/00—Error detection; Error correction; Monitoring
- G06F11/22—Detection or location of defective computer hardware by testing during standby operation or during idle time, e.g. start-up testing
- G06F11/2205—Detection or location of defective computer hardware by testing during standby operation or during idle time, e.g. start-up testing using arrangements specific to the hardware being tested
- G06F11/221—Detection or location of defective computer hardware by testing during standby operation or during idle time, e.g. start-up testing using arrangements specific to the hardware being tested to test buses, lines or interfaces, e.g. stuck-at or open line faults
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Abstract
It includes motivating generation module from the automation pressure testing system of equipment interface that the invention discloses a kind of for AXI protocol, buffer queue module, data reception module, excitation and result memory module, Comparative result module and module to be measured.The extreme case of multiple main equipments while access is directly being simulated from equipment interface one end using technical solution of the present invention, is having the advantages that configurability is high, verifying coverage rate is abundant.
Description
Technical field
The invention belongs to emulation testing field more particularly to it is a kind of for AXI protocol from the automation pressure of equipment interface
Test macro and method.
Background technique
AXI is the on-chip bus agreement that high-performance, high bandwidth, low latency are most widely used in current SoC chip, it is real
Being separated from each other for address/control and data signal is showed, has formed write address, write data, write back and hold, read address and read data five
Mutually independent channel can satisfy the demand of the system-on-chip designs of high-performance and high complexity.
In practical applications, equipment of the carry in AXI bus is divided into two kinds, i.e. main equipment and from equipment, wherein master sets
It is standby to be responsible for initiating read-write requests, it is responsible for receiving read-write requests and responds from equipment.Both equipment pass through host device interface respectively
And the communication between internal and bus is realized from equipment interface.Since current SoC chip scale is increasing, function is more next
It is more complicated, main equipment on chip and may have from equipment it is multiple, it is right simultaneously if there is multiple main equipments such as processor, DMA
A certain the case where being written and read access from equipment, should be at high pressure conditions from the bus interface of equipment at this time.From equipment one
From the point of view of end, this high pressure conditions have several features, first is that read-write requests are very intensive, between the valid signal of difference request not
Have interval；Second is that the type of read-write requests is irregular；Third is that the corresponding different ID of the request of different main equipments；Fourth is that main equipment
The ready signal of sending may not continuously effective because the interface of main equipment itself may be also at busy condition.This
Under extreme case, if from equipment interface miswork, influence may be entire chip function.
It is directed to AXI protocol at present from the conventional test methodologies of equipment interface only for basic transfer function, can guarantee list
A main equipment and individually between equipment can normal communication, and can be able to not verify normal under hyperbaric environment from equipment interface
Work.If using really including multiple main equipments and a verification environment from equipment, poor, emulation that there are configurability
The disadvantages of time is long.
Summary of the invention
In view of the above technical problems, the present invention provides a kind of automation pressure test for AXI protocol from equipment interface
System and method solves not proving what can AXI work normally under hyperbaric environment from equipment interface in traditional verification method
Problem.
It is a kind of for AXI protocol from the automation pressure testing system of equipment interface, including excitation generation module caches team
Column module, data reception module, excitation and result memory module, Comparative result module and module to be measured, wherein
Motivate generation module, the pumping signal for generating write address, writing three data, read address channels；
Buffer queue module, for simulating the excitation letter for receiving generation from the outstanding caching in equipment interface
Number, including the first write address buffer queue, the second write address buffer queue and read address buffer queue；
Data reception module is assisted for holding and reading data channel with writing back for the module to be measured and communicated according to AXI
The requirement of view receives the write request receipt and read data that the module to be measured issues；
Excitation and result memory module, for store it is described excitation generation module be written the module to be measured data and
The data read from the module to be measured, and by the data that the module to be measured is written and the number read from the module to be measured
According to being transferred to the Comparative result module；
Comparative result module, for will be written the data of the module to be measured with from the data that the module to be measured is read into
Row compares, and judges whether the module work to be measured is normal；
Module to be measured has the functional module of AXI interface, for simulating the reading and writing data situation from equipment.
Further, the excitation generation module can continuously transmit read-write requests, and every time in request, the valid in channel believes
Number can continuous and effective, until the Devices to test ready signal be height, can just send and request next time, be asked continuously transmitting
In the case where asking, valid will not be dragged down between adjacent Twice requests, and only the buffer queue in the buffer queue module is
When " full " state, the valid of respective channel can just be dragged down, and stop sending request；
The write address channel of the excitation generation module generation and ID the and burst_type signal in read address channel are
Random value.
Further, enabled write back of the reading of the first write address buffer queue described in the buffer queue module holds channel
Valid and ready signal control；
The reading of the read address buffer queue is enabled to be controlled by valid the and ready signal for reading data channel；
The reading of the second write address buffer queue is enabled to be controlled by valid the and ready signal of write data channel；
Its hollow full signal is generated by combinational logic, and data write-in and reading use asynchronous logic.
Further, bready the and rready signal that the data reception module issues is random value.
Further, the Comparative result module the data for be written the module to be measured with from the module to be measured
Before the comparing of reading, first it is more described excitation generation module issue read-write requests number with receive it is described to be measured
Whether the read-write number of responses of module is identical.
The present invention also provides a kind of for AXI protocol from the automation method for testing pressure of equipment interface comprising steps of
S1, excitation generate step, the excitation letter that excitation generation module generates write address, writes three data, read address channels
Number；
S2, data buffer storage step, buffer queue module simulation are received and are produced from the outstanding caching in equipment interface
Raw pumping signal, including the first write address buffer queue, the second write address buffer queue and read address buffer queue；
S3, data reception step, the writing back of data reception module and module to be measured are held and are read data channel and communicated, pressed
The write request receipt and read data that the module to be measured issues are received according to the requirement of AXI protocol；
S4, excitation and result storing step, excitation and the storage of result memory module be written the data of the module to be measured with
And the data read from the module to be measured, and read by the data that the module to be measured is written and from the module to be measured
Data are transferred to the Comparative result module；
S5, Comparative result step, Comparative result module will be written the data of the module to be measured with from the module to be measured
The data of reading are compared, and judge whether the module work to be measured is normal.
Further, the excitation generation module can continuously transmit read-write requests in step sl, every time in request, channel
Valid signal can continuous and effective, until the Devices to test ready signal be height, can just send and request next time, even
In the case that supervention send request, valid will not be dragged down between adjacent Twice requests, slow only in the buffer queue module
Deposit queue be " full " state when, the valid of respective channel can just be dragged down, stop send request；
The write address channel of the excitation generation module generation and ID the and burst_type signal in read address channel are
Random value.
Further, enabled write back of the reading of the first write address buffer queue described in buffer queue module is held in step S2
Valid the and ready signal in channel controls；
The reading of the read address buffer queue is enabled to be controlled by valid the and ready signal for reading data channel；
The reading of the second write address buffer queue is enabled to be controlled by valid the and ready signal of write data channel；
Its hollow full signal is generated by combinational logic, and data write-in and reading use asynchronous logic.
Further, bready the and rready signal that the data reception module issues is random value.
Further, the Comparative result module described in step S5 the data for be written the module to be measured with from described
Before the comparing that module to be measured is read, read-write requests number that first the excitation generation module issues with receive
Whether the read-write number of responses of the module to be measured is identical.
Using technical solution of the present invention directly from equipment interface one end simulate multiple main equipments and meanwhile access
Extreme case has the advantages that configurability is high, verifying coverage rate is abundant.
Detailed description of the invention
Fig. 1 is that the present invention is directed to automation pressure testing system schematic block diagram of the AXI protocol from equipment interface；
Fig. 2 is the example timing diagram in write address channel in the present invention；
Fig. 3 A is the first write address buffer queue connected mode schematic diagram of the invention；
Fig. 3 B is the second write address buffer queue connected mode schematic diagram of the invention；
Fig. 3 C is read address buffer queue connected mode schematic diagram of the present invention；
Fig. 4 is that the sky that the present invention caches expires signal generation logic；
Fig. 5 is the asynchronous write logic that the present invention caches；
Fig. 6 is flow chart of the present invention using the method for automation pressure testing system.
Specific embodiment
Technical solution of the present invention is clearly and completely described below in conjunction with attached drawing, it is clear that described implementation
Example is a part of the embodiment of the present invention, instead of all the embodiments.Based on the embodiments of the present invention, ordinary skill
Personnel's every other embodiment obtained without making creative work, shall fall within the protection scope of the present invention.
As shown in Figure 1, include excitation generation module 1 from the automation pressure testing system of equipment interface for AXI protocol,
Buffer queue module 2, data reception module 3, excitation and result memory module 4, Comparative result module 5 and module to be measured 6,
In module 6 to be measured, have the functional module of AXI interface, for simulating the reading and writing data situation from equipment
(1) generation module 1 is motivated
The module is responsible for the pumping signal for generating write address, writing three data, read address channels.The module can continuously transmit
Read-write requests, every time in request, the valid signal meeting continuous and effective in channel, until being height, just meeting from the ready signal of equipment
Transmission is requested next time, and in the case where continuously transmitting request, valid will not be dragged down between adjacent Twice requests, only slow
When to deposit Queue module 2 be " full " state, indicate to reach capacity from the outstanding ability of equipment interface, respective channel at this time
Valid can just drag down, stop send request.As long as the module will continue to send out as shown in Fig. 2, buffer queue module is non-full
Send request.Wherein ID the and burst_type signal in write address channel and read address channel is random value, different ID simulations
Different main equipments, and random burst_type indicates that single reads and writes and the two kinds of access of burst read-write is random out
It is existing.The address that the two channels issue can guarantee the traversal from device address space.And write data channel can according to write address come
Data are issued, data are random value, and ID quotes consistent with the ID in write address channel.
(2) buffer queue module 2
The module is responsible for simulating the caching of the outstanding from equipment interface, and depth can match.Including three caching teams
Column, the first write address buffer queue, the second write address buffer queue and read address buffer queue.Its specific connection type is as schemed
Shown in 3A-3C.
The reading of first write address buffer queue is enabled control by valid the and ready signal for holding channel is write back, and expression is from setting
For write request of every reception, the request number in the first write address buffer queue will reduce one.If write address caching 1
For " full " state, then generation module 1 is motivated then to stop sending write address request.
Similarly, the reading of read address buffer queue is enabled control by valid the and ready signal for reading data channel, expression from
An equipment read request of every reception, read address caching in request number will reduce one.If read address caching is " full "
State then motivates generation module 1 then to stop sending read address request.
And the reading of the second write address buffer queue enables to be controlled by valid the and ready signal of write data channel, indicates only
There is request in the caching, then motivate generation module 1 that will read request, and update the signal in write data channel, if
Second write address buffer queue is " sky " state, then motivates generation module 1 that will stop transmission and write data.
In order to realize the timing shown in Fig. 2, the caching that the present invention uses has done one based on traditional design method
Series is improved, comprising: is generated first is that the full signal of sky is changed to combinational logic；Second is that data write-in and reading use asynchronous logic.
The reason of Fig. 4 shows the generation logic of empty full signal, does not use sequential logic is, if empty full signal is defeated using register
Out, then excitation generation module 1 is when detecting " full " state, next cycle can just be dragged down valid, and being equivalent to can be multiple
A request out.Using combinational logic, it is equivalent to and the generation of empty full signal is advanced by a cycle, it is ensured that sending out
Out after the last one request, valid is dragged down at once.Fig. 5 shows the data write-in logic for applying latch.The present invention answers
In caching, writing data is asynchronous write latch, and reads data without register, direct Combinational logic output, in this way
The reason of doing is to motivate the valid of write data channel and data in generation module 1 to need synchronized update, and read data and directly combine
Logic output can guarantee that the read port data of caching are next request for needing to read always；And asynchronous write function guarantees
It is buffered in when being written for the first time, the data of write-in can be reacted to read port no-delayly.
(3) data reception module 3
The module is responsible for holding and reading data channel with writing back for module to be measured and communicated, according to the requirement of AXI protocol
Receive the write request receipt and read data that Devices to test issues.Bready the and rready signal that the module issues is random value,
And be in most cases 0, it indicates that main equipment is in busy condition in most cases, data can not be received.It can test in this way
Can demonstrate,prove from equipment interface work normally in the case where the ready signal that slowly cannot get main equipment is fed back.
(4) excitation and result memory module 4
The module is responsible for the data that will motivate generation module 1 that the data of module 6 to be measured are written and read from module 6 to be measured
It stores, and exports to Comparative result module 5 and compare correctness.
(5) Comparative result module 5
The module is responsible for data to be written and is compared with the data of reading, judges whether the work of module 6 to be measured is normal.
Before comparing write-in data and reading the consistency of data, need to compare first the read-write requests that excitation generation module 1 issues
Whether number is identical as the read-write number of responses of the module to be measured received, tentatively judges five channels by this result
Global test result improves the efficiency of debugging.
In addition, the present invention can also to write address, write data, three channels of read address set up time-out respectively and exit machine
System, accordingly even when going wrong from equipment interface, such as does not give ready signal slowly, then entire verification environment still may be used
With normal termination, without continuing waiting for.The time restriction that time-out exits can match.
The present invention also provides use automation pressure testing system method as shown in fig. 6, comprising steps of
S1, excitation generate step, the excitation letter that excitation generation module generates write address, writes three data, read address channels
Number；
S2, data buffer storage step, buffer queue module simulation are received and are produced from the outstanding caching in equipment interface
Raw pumping signal, including the first write address buffer queue, the second write address buffer queue and read address buffer queue；
S3, data reception step, the writing back of data reception module and module to be measured are held and are read data channel and communicated, pressed
The write request receipt and read data that the module to be measured issues are received according to the requirement of AXI protocol；
S4, excitation and result storing step, excitation and the storage of result memory module be written the data of the module to be measured with
And the data read from the module to be measured, and read by the data that the module to be measured is written and from the module to be measured
Data are transferred to the Comparative result module；
S5, Comparative result step, Comparative result module will be written the data of the module to be measured with from the module to be measured
The data of reading are compared, and judge whether the module work to be measured is normal.
Obviously, the above embodiments are merely examples for clarifying the description, rather than the restriction to embodiment.For
For person of an ordinary skill in the technical field, other various forms of variations can also be made on the basis of the above description
Or it changes.There is no necessity and possibility to exhaust all the enbodiments.And obvious variation extended from this
Or it changes and still falls among the protection scope of the invention.
Claims (10)
1. it is a kind of for AXI protocol from the automation pressure testing system of equipment interface, which is characterized in that generate mould including excitation
Block, buffer queue module, data reception module, excitation and result memory module, Comparative result module and module to be measured,
In,
Motivate generation module, the pumping signal for generating write address, writing three data, read address channels；
Buffer queue module receives the pumping signal of generation, wraps for simulating from the outstanding caching in equipment interface
Include the first write address buffer queue, the second write address buffer queue and read address buffer queue；
Data reception module, for holding and reading data channel with writing back for the module to be measured and communicated, according to AXI protocol
It is required that receive the write request receipt and read data that the module to be measured issues；
For storing the excitation generation module data of the module to be measured are written and from institute in excitation and result memory module
The data that module to be measured is read are stated, and are passed by the data that the module to be measured is written and from the data that the module to be measured is read
It is defeated by the Comparative result module；
Comparative result module, for comparing the data that the module to be measured is written with the data read from the module to be measured
It is right, judge whether the module work to be measured is normal；
Module to be measured has the functional module of AXI interface, for simulating the reading and writing data situation from equipment.
2. automation pressure testing system as described in claim 1, which is characterized in that the excitation generation module can continuously be sent out
Read-write requests are sent, every time in request, the valid signal meeting continuous and effective in channel, until the ready signal of the Devices to test is
Height can just send and request next time, and in the case where continuously transmitting request, valid will not be dragged down between adjacent Twice requests, only
When to have buffer queue in the buffer queue module be " full " state, the valid of respective channel can just be dragged down, and stop transmission
Request；
ID the and burst_type signal in write address channel and read address channel that the excitation generation module generates is random
Value.
3. automation pressure testing system as described in claim 1, which is characterized in that the described in the buffer queue module
The reading of one write address buffer queue is enabled to be controlled by valid the and ready signal for holding channel is write back；
The reading of the read address buffer queue is enabled to be controlled by valid the and ready signal for reading data channel；
The reading of the second write address buffer queue is enabled to be controlled by valid the and ready signal of write data channel；
Its hollow full signal is generated by combinational logic, and data write-in and reading use asynchronous logic.
4. automation pressure testing system as described in claim 1, which is characterized in that the data reception module issued
Bready and rready signal is random value.
5. automation pressure testing system as described in claim 1, which is characterized in that the Comparative result module is being write
Enter the data of the module to be measured with before the comparing that the module to be measured is read, the first excitation generation module
Whether the read-write requests number of sending is identical as the read-write number of responses of the module to be measured received.
6. a kind of be directed to AXI protocol from equipment interface using any automation pressure testing system of claim 1-5
Automate method for testing pressure, which is characterized in that comprising steps of
S1, excitation generate step, the pumping signal that excitation generation module generates write address, writes three data, read address channels；
S2, data buffer storage step, buffer queue module simulation receive generation from the outstanding caching in equipment interface
Pumping signal, including the first write address buffer queue, the second write address buffer queue and read address buffer queue；
S3, data reception step, the writing back of data reception module and module to be measured are held and are read data channel and communicated, according to
The requirement of AXI protocol receives the write request receipt and read data that the module to be measured issues；
S4, excitation and result storing step, excitation and the storage of result memory module be written the module to be measured data and from
The data that the module to be measured is read, and by the data that the module to be measured is written and the data read from the module to be measured
It is transferred to the Comparative result module；
S5, Comparative result step, Comparative result module read the data that the module to be measured is written with from the module to be measured
Data be compared, judge whether the module to be measured work normal.
7. automation method for testing pressure as claimed in claim 6, which is characterized in that the excitation generates mould in step sl
Block can continuously transmit read-write requests, every time in request, the valid signal meeting continuous and effective in channel, until the Devices to test
Ready signal is height, can just send and request next time, in the case where continuously transmitting request, valid between adjacent Twice requests
It will not drag down, when only the buffer queue in the buffer queue module is " full " state, the valid of respective channel can just be drawn
It is low, stop sending request；
ID the and burst_type signal in write address channel and read address channel that the excitation generation module generates is random
Value.
8. automation method for testing pressure as claimed in claim 6, which is characterized in that institute in buffer queue module in step S2
The reading for stating the first write address buffer queue enables to be controlled by valid the and ready signal for holding channel is write back；
The reading of the read address buffer queue is enabled to be controlled by valid the and ready signal for reading data channel；
The reading of the second write address buffer queue is enabled to be controlled by valid the and ready signal of write data channel；
Its hollow full signal is generated by combinational logic, and data write-in and reading use asynchronous logic.
9. automation method for testing pressure as claimed in claim 6, which is characterized in that the data reception module issued
Bready and rready signal is random value.
10. automation method for testing pressure as claimed in claim 6, which is characterized in that the Comparative result mould described in step S5
Block is first more described to swash in the data for be written the module to be measured and before the comparing that the module to be measured is read
Whether the read-write requests number for encouraging generation module sending is identical as the read-write number of responses of the module to be measured received.
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| CN109522194B (en) | 2022-02-25 |
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