JP3839161B2 - 2-port memory diagnostic device, 2-port memory diagnostic monitoring device, and 2-port memory diagnostic method - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a 2-port memory diagnostic device, a 2-port memory diagnostic monitoring device, and a 2-port memory diagnostic method, and more particularly to an expansion board for data communication between a computer such as a personal computer and an expansion board loaded in the computer. The present invention relates to a 2-port memory diagnosis device, a 2-port memory diagnosis monitoring device, and a 2-port memory diagnosis method.
[0002]
[Prior art]
Data transmission between the personal computer and the expansion board installed in the expansion slot has a port on the personal computer side and the expansion board side, respectively, and a shared memory that can be accessed arbitrarily from both the personal computer and the expansion board This is done via a two-port memory.
[0003]
12 and 13 show a conventional 2-port memory diagnostic apparatus. In these drawings, reference numeral 100 denotes a personal computer (personal computer), and reference numeral 200 denotes an expansion board mounted in an expansion slot of the personal computer 100. The expansion board 200 is equipped with a two-port memory 210. In the 2-port memory 210, the entire area from addresses 1 to n is a diagnostic area. In the conventional diagnostic apparatus, diagnosis consists of two phases, port diagnosis on the personal computer side and port diagnosis on the extension board, and each phase is independent.
[0004]
FIG. 12 shows the port diagnosis phase on the personal computer side. In this diagnosis phase, the personal computer 100 writes arbitrary data to the 2-port memory 210 by the data writing means 101 and data from the 2-port memory 210 by the data reading means 102. The data comparison means 103 compares (collates) the written data with the read data. During this time, the expansion board 200 stops access to the 2-port memory 210.
[0005]
FIG. 13 shows an expansion board side port diagnosis phase. In this diagnosis phase, the expansion board 200 writes arbitrary data to the 2-port memory 210 by the data writing means 201 and data from the 2-port memory 210 by the data reading means 202. The data comparison means 203 compares (collates) the written data with the read data. During this time, the personal computer 100 stops accessing the 2-port memory 210. FIG. 14 is a flowchart of the diagnostic program executed by each of the personal computer 100 and the expansion board 200 as described above.
[0006]
First, arbitrary data is written to the 2-port memory 210 by the data writing means 101 or 201 (step S100), and after the writing is completed, data is read from the 2-port memory 210 by the data reading means 102 or 202 (step S101). The write data and the read data are compared at 103 or 203 (step S102). If the written data and the read data match (Yes at step S102), the process ends with normality determination (step S103). On the other hand, if the write data does not match the read data (Yes at step S102), an error determination is performed (step S104).
[0007]
In addition, as another conventional diagnostic device, additional hardware serving as a communication path between the personal computer side CPU and the expansion board side CPU is provided separately from the 2-port memory for diagnosis, and data is transmitted between the two paths. There is something to compare. For example, Japanese Patent Laid-Open No. 2-205956 discloses a system in which when an interrupt request signal from one CPU is input to one port of a 2-port memory, an interrupt signal is output from the other port to the other CPU. A path for inputting an interrupt signal from the other port to one CPU and a path for inputting an interrupt request signal from one CPU to the other CPU are provided. A failure diagnosis apparatus for a two-port memory that is confirmed by overlapping is shown.
[0008]
[Problems to be solved by the invention]
In the conventional 2-port memory diagnostic device (the former), since the diagnosis of the personal computer side port and the expansion board side port is performed in separate phases, data is surely transferred from one to the other via the 2-port memory. There is no guarantee that you can send. For example, even if one side writes or reads data to an incorrect address, it becomes normal and strict diagnosis is not performed.
[0009]
The latter two-port memory failure diagnosis device only improves the reliability by duplicating the data transmission path. Even in this failure diagnosis device, if both data transmission paths still fail or the two-port memory is normal However, when the data transmission path provided for diagnosis fails, there is a problem that the 2-port memory is misdiagnosed as a failure. In addition, another data transfer path must be added by hardware for diagnosis.
[0010]
The present invention has been made to solve the above-described problems, and a data transmission / reception function via a two-port memory in cooperation between a personal computer and an expansion board without adding or changing special hardware. It is an object of the present invention to obtain a 2-port memory diagnostic device, a 2-port memory diagnostic monitoring device, and a 2-port memory diagnostic method that accurately perform the above-described diagnosis.
[0011]
[Means for Solving the Problems]
In order to achieve the above object, a two-port memory diagnostic device according to the present invention is a two-port memory diagnostic device accessible by both a first CPU and a second CPU. Second CPU The other CPU side wrote 2-port memory data The Read Mu Data reading means; By the data reading means Data read from 2-port memory In Reversible transformation Apply Data conversion means and data reversibly converted by the data conversion means The Write to 2-port memory Mu Data writing means; By the data reading means Read Mareta To the data Performed by data conversion means on the other CPU side Apply reverse transformation of reversible transformation Data and , Before data is read from the 2-port memory by the data reading means on the own CPU side, the data writing means on the own CPU side is loaded into the 2-port memory. Write What Data comparison means for comparing with data, and performing error determination based on data mismatch.
[0012]
According to a second aspect of the present invention, there is provided a diagnostic apparatus for a two-port memory, wherein the data reading means on one side of the first CPU and the second CPU causes the data writing means on the other side to store data for the two-port memory. Changes in data in the 2-port memory due to writing are monitored, and error determination is performed by timeout.
[0013]
A diagnostic device for a two-port memory according to the next invention comprises a diagnosis start notification means for notifying the start of diagnosis from the first CPU to the second CPU, and the end of diagnosis from the first CPU to the second CPU. A diagnosis end notification means for informing; a diagnosis start confirmation means for confirming a diagnosis start notification from the first CPU in the second CPU; and a diagnosis end notification from the first CPU in the second CPU Diagnostic end confirmation means.
[0014]
A diagnostic device for a two-port memory according to the next invention defines a plurality of judgment flag areas. Shi The diagnosis start notifying means writes the diagnosis start value in all of the plurality of determination flag areas, and the diagnosis start confirmation means is reversible if at least one value of the plurality of determination flag areas becomes the diagnosis start value. The data is converted and written in the original determination flag area, and the diagnosis start notification means reads it and performs reverse conversion of reversible conversion.If the value after reverse conversion matches the diagnosis start value written in the determination flag area, diagnosis is performed. The diagnosis end notification means writes the diagnosis end value in all the plurality of judgment flag areas, and the diagnosis end confirmation means determines that at least one value in the plurality of judgment flag areas becomes the diagnosis end value. , Reversibly transform it and write it in the original judgment flag area, the diagnosis end notification means reads it, performs reverse transformation of the reversible transformation, and the value after the inverse transformation is the judgment flag If consistent with a diagnosis end value written in the rear is to successfully complete diagnosis.
[0015]
The diagnostic device for a two-port memory according to the next invention is the data conversion means. Is applied to the data read from the 2-port memory by the data reading means. Reversible transformation and the data comparison means Performed by data conversion means on the partner CPU side that applies the data read from the 2-port memory by the data reading means. The data conversion formula used in the reverse conversion of the reversible conversion can be variably set.
[0016]
In the two-port memory diagnostic apparatus according to the next invention, the first CPU is a computer. In A second CPU is a CPU on an expansion board mounted in an expansion slot of the computer, and diagnoses a 2-port memory provided on the expansion board.
[0017]
In order to achieve the above-described object, the monitoring device for two-port memory diagnosis according to the present invention is the same as the computer in which the two-port memory diagnosis is performed by the two-port memory diagnosis device according to the present invention. It is communicably connected on a network line, and can monitor the status of the 2-port memory diagnosis on another personal computer or access information from the other personal computer via the network.
[0018]
In order to achieve the above-described object, the two-port memory diagnosis method according to the present invention is the two-port memory diagnosis method accessible by both the first CPU and the second CPU. And the second CPU writes data to the 2-port memory on the other CPU side, and the other CPU side The one CPU side 2-port memory Read the data written to Read data In Reversible transformation Out And reversibly transformed data The Write to 2-port memory See On the one CPU side, the data written on the two-port memory by the other CPU side is read, and the read data is On the other CPU side Apply the inverse of the reversible transformation, Before the other CPU reads data from the 2-port memory, Write What The data is compared with the data, and an error determination is performed based on the data mismatch.
[0019]
The two-port memory diagnosis method according to the next invention is the data of the two-port memory by writing data to the two-port memory on the CPU side of either the first CPU or the second CPU. Changes are monitored and error determination is performed by timeout.
[0020]
The two-port memory diagnosis method according to the next invention is to notify the diagnosis start from the first CPU to the second CPU, confirm the diagnosis start notification from the first CPU in the second CPU, The first CPU notifies the end of the diagnosis to the second CPU, and the second CPU confirms the diagnosis end notification from the first CPU.
[0021]
In the diagnosis method for a two-port memory according to the next invention, a plurality of judgment flag areas are defined, and a diagnosis start value is written to all of the plurality of judgment flag areas from the first CPU side. If at least one of the values becomes a diagnosis start value, it is reversibly converted on the second CPU side and written into the original determination flag area, and is read out on the first CPU side to perform reversible conversion. Reverse conversion is performed, and if the value after reverse conversion matches the diagnosis start value written in the determination flag area, the diagnosis starts normally, and the diagnosis end value is set in all the determination flag areas from the first CPU side. If at least one value in the plurality of determination flag areas becomes a diagnosis end value, the second CPU side reversibly converts it and writes it in the original determination flag area. Performs an inverse transformation of the reversible transform reads it in the CPU side, those values after inverse transformation is successfully complete diagnosis if consistent with a diagnosis end value written to the determination flag area.
[0022]
A diagnostic method for a two-port memory according to the next invention is as follows: Read from 2-port memory data Apply to Reversible transformation, Performed by the counterpart CPU for data read from 2-port memory The data conversion formula used in the reverse conversion of the reversible conversion is variably set.
[0023]
In the next two-port memory diagnosis method according to the present invention, the first CPU is a computer. In The second CPU is a CPU on an expansion board mounted in the expansion slot of the computer, and diagnoses the 2-port memory provided on the expansion board.
[0024]
DETAILED DESCRIPTION OF THE INVENTION
Exemplary embodiments of a 2-port memory diagnostic device, a 2-port memory diagnostic monitoring device, and a 2-port memory diagnostic method according to the present invention will be described below in detail with reference to the accompanying drawings.
[0025]
Embodiment 1 FIG.
FIG. 1 is a hardware configuration diagram showing an embodiment of a 2-port memory diagnostic apparatus according to the present invention, and FIG. 2 is a software block diagram thereof. As shown in FIG. 1, the personal computer 10 includes a CPU 11 and a main storage device 12, and can execute a personal computer side diagnostic program by the CPU 11.
[0026]
The expansion board 50 includes a CPU 51, a main storage device 52, and a 2-port memory 53 to be diagnosed, and the expansion board side diagnostic program can be executed by the CPU 51. The expansion board 50 has a resource 54 including a part of the 2-port memory 53 or an I / O port or an interrupt port.
[0027]
As shown in FIG. 2, the personal computer 10 includes, as a personal computer side software module group (personal computer side diagnostic program), a diagnostic management module 21 that controls diagnosis execution, a data reading module 22, a data conversion module 23, and the like. The data writing module 24, the data comparison module 25, the diagnosis start notification module 26, the diagnosis end notification module 27, the conversion mode setting module 28, and the network communication module 29 are stored.
[0028]
The expansion board 50 includes, as an expansion board side software module group (extension board side diagnosis program), a diagnosis management module 61 that controls diagnosis execution, a data reading module 62, a data conversion module 63, and a data writing module 64. A data comparison module 65, a diagnosis start confirmation module 66, a diagnosis end confirmation module 67, and a conversion mode acquisition module 68 are stored.
[0029]
FIG. 3 is a block diagram of the 2-port memory diagnostic unit. The personal computer 10 embodies the data reading means 31, the data converting means 32, the data writing means 33, and the data comparing means 34 by executing the above personal computer side software module. The data reading means 31 waits for the expansion board 50 to write data to the diagnostic area of the 2-port memory 53 and reads data from the diagnostic area of the 2-port memory 53. If the waiting time exceeds a certain time, that is, if the expansion board 50 does not write data in the diagnostic area of the 2-port memory 53 within the certain time, a timeout error is returned as a failure in the diagnostic area is detected.
[0030]
The data conversion means 32 converts the data passed from the data reading means 31 on the personal computer side. The personal computer side conversion is a reversible conversion stored in the data conversion means 32 in advance, for example, bit left rotation. The data writing means 33 writes the data passed from the data conversion means 32 in the diagnostic area of the 2-port memory 53.
[0031]
The data comparison unit 34 performs the inverse conversion on the extension board side, for example, bit inversion (re-bit inversion), and the bit-inverted data and the data writing unit 33 or the data conversion unit 32. If the comparison result is unequal, a data comparison error is returned. The expansion board 50 embodies data reading means 71, data converting means 72, data writing means 73, and data comparing means 74 by executing the above-described expansion board side software module.
[0032]
The data reading means 71 waits for the personal computer 10 to write data to the diagnostic area of the 2-port memory 53 and reads data from the diagnostic area of the 2-port memory 53. If the waiting time exceeds a certain time, that is, if the personal computer 10 does not write data in the diagnosis area of the 2-port memory 53 within a certain time, a time-out error is returned as a diagnosis area failure is detected.
[0033]
The data conversion means 72 converts the data passed from the data reading means 71 on the extension board side. The expansion board side conversion is a reversible conversion stored in the data conversion means 72 in advance, and is, for example, bit inversion. The data writing means 73 writes the data passed from the data converting means 72 to the diagnostic area of the 2-port memory 53.
[0034]
The data comparison unit 73 performs inverse conversion on the personal computer side of the data passed from the data reading unit 71, for example, bit right rotation, and the data that has been bit right rotated and the write data passed from the data writing unit 73 or the data conversion unit 72 If the comparison result is unequal, a data comparison error is returned.
[0035]
Next, a data flow between the personal computer 10 and the expansion board 50 at the time of diagnosis will be described. For example, when the data writing means 33 of the personal computer 10 writes data “0001” in the diagnostic area (1) of the 2-port memory 53, the data reading means 71 of the expansion board 50 is in the diagnostic area (1) of the 2-port memory 53. ), The data “0001” is read and transferred to the data conversion means 72.
[0036]
The data conversion unit 72 performs bit inversion (extension board side conversion) of the data “0001” to “1110”, and passes the bit inverted data “1110” to the data writing unit 75. The data writing means 75 writes the data “1110” from the data converting means 72 to the diagnostic area (1) of the 2-port memory 53. Next, the data reading means 31 of the personal computer 10 reads the data “1110” in the diagnostic area (1) of the 2-port memory 53 and passes it to the data comparing means 34. The data comparison unit 34 bit-inverts the data “1110” to “0001” (inversion on the expansion board side), and this data and the data “data written by the data writing unit 33 in the diagnostic area (1) of the 2-port memory 53” Compare with 0001 ".
[0037]
The above-described data flow is a normal flow, and in the case of an abnormality, the data obtained by reverse conversion on the expansion board side does not become “0001”, so the comparison results do not match.
[0038]
As described above, the data is transferred from the personal computer 10 side to the 2-port memory 53, and the data is bit-inverted on the expansion board 50 side, returned to the 2-port memory 53 on the expansion board 50 side, and returned to the 2-port memory 53. The data is inverted (returned) again on the personal computer 10 side, and this is compared with the data passed from the personal computer 10 side to the 2-port memory 53 to the 2-port memory 53 from the personal computer 10 side. It is determined whether or not the passed data is correctly received on the expansion board 50 side and this data is correctly returned from the expansion board 50 side to the personal computer 10 side.
[0039]
When the data writing means 73 of the expansion board 50 writes, for example, data “0011” in the diagnostic area (1) of the 2-port memory 53, the data reading means 31 of the personal computer 10 is in the diagnostic area of the 2-port memory 53. The data “0011” is read from (1) and transferred to the data conversion means 32.
[0040]
The data conversion means 32 performs bit left rotation (computer side conversion) of the data “0011” to “0110”, and passes this bit left rotation data “0110” to the data writing means 33. The data writing means 33 writes the data “0110” from the data conversion means 32 in the diagnostic area (1) of the 2-port memory 53. Next, the data reading means 71 of the expansion board 50 reads the data “0110” in the diagnostic area (1) of the 2-port memory 53 and passes it to the data comparing means 74.
[0041]
The data comparison means 74 bit-rotates the data “0110” to “0011” (inverse conversion on the personal computer side), and the data “data written by the data writing means 73 in the diagnostic area (1) of the 2-port memory 53”. Compare with 0011 ". The above data flow is a normal flow, and when abnormal, the personal computer side inversely converted data does not become “0011”, so the comparison results are inconsistent.
[0042]
As described above, the data is transferred to the 2-port memory 53 from the expansion board 50 side, and the data is bit-left rotated on the personal computer 10 side, returned to the 2-port memory 53 on the expansion board 50 side, and returned to the 2-port memory 53. The bit right rotation (return to the original) on the expansion board 50 side and comparing this with the data passed from the expansion board 50 side to the 2-port memory 53 means that the data is transferred from the expansion board 50 side to the 2-port memory 53. The passed data is correctly received on the personal computer 10 side, and it is determined whether or not this data is correctly returned from the personal computer 10 side to the expansion board 50 side.
[0043]
4A and 4B are flowcharts of the diagnostic program. Note that (a) is a flowchart of the diagnostic program on the personal computer side, and (b) is a flowchart of the diagnostic program on the expansion board side.
[0044]
Assume that the state of the 2-port memory at the start of diagnosis is arbitrary. When the diagnosis is started, the expansion board reads the initial data of the diagnostic area of the 2-port memory 53 (step S10), and then reads the data of the diagnostic area of the 2-port memory 53 every predetermined time (step S11). It is determined whether or not the data in the diagnostic area of the 2-port memory 53 has changed due to the data writing from the 10 side (step S30) (step S12). That is, the personal computer 10 side waits for the data in the diagnostic area of the 2-port memory 53 to change by writing data in the diagnostic area of the 2-port memory 53. When the waiting time is counted and the specified time is exceeded (Yes at Step S13), a time-out error occurs and error processing is performed (Step S20).
[0045]
The personal computer 10 side writes arbitrary data to the diagnostic area of the 2-port memory (step S30), and then reads the data of the diagnostic area of the 2-port memory 53 every predetermined time (step S31). It is determined whether or not the data in the diagnostic area of the 2-port memory 53 has changed due to the data writing (step S14) (step S32). That is, the expansion board 50 side waits for the data in the 2-port memory 53 to change by writing data in the diagnostic area of the 2-port memory. When this waiting time is counted and the specified time is exceeded (Yes at Step S33), a time-out error occurs and error processing is performed (Step S36).
[0046]
The expansion board 50 side converts the read data in step S11 to the expansion board side and writes it in the diagnostic area of the 2-port memory 53 (step S14), and then reads the data in the diagnostic area of the 2-port memory 53 again every predetermined time. (Step S15), it is determined whether or not the data in the diagnostic area of the 2-port memory 53 has changed due to data writing from the personal computer 10 side (Step S30) (Step S16). Also in this case, the personal computer 10 waits for the data in the diagnostic area of the 2-port memory 53 to change by writing data in the diagnostic area of the 2-port memory 53, and if the waiting time exceeds the specified time (Yes in step S17). A time-out error occurs and error processing is performed (step S20).
[0047]
The personal computer 10 compares the data written in step S30 and the read data obtained in step S31 and reversely converted on the expansion board side (step S34). If they do not match (No in step S34), a data comparison error occurs. Thus, error processing is performed (step S36). If they match (Yes at Step S34), the read data at Step S31 is converted on the personal computer side and written in the diagnostic area of the 2-port memory 53 (Step S35), and after returning to Step S31, the same processing is repeated.
[0048]
The expansion board 50 side compares the write data in step S14 with the read data in step S15 and reversely converted on the personal computer side (step S18). If they do not match (No in step S18), a data comparison error occurs. Then, error processing is performed (step S20). If they match (Yes in step S34), the read data in step S15 is converted on the extension board side and written in the diagnostic area of the 2-port memory 53. After returning to step S15, the same processing is repeated.
[0049]
The above diagnosis is for one address of the 2-port memory 53, and each CPU performs the same diagnosis for all addresses 1 to n of the 2-port memory 53. The order of processing for each address is not a problem.
[0050]
When an expansion board is installed in the expansion slot of a personal computer, when the expansion board is installed for the first time, at regular checkups, when the expansion board does not work well, when the operation is unstable, it suddenly stopped working Sometimes it is necessary to perform an expansion board diagnosis.
[0051]
When diagnosing the interface part between a personal computer such as a 2-port memory and an expansion board in the diagnosis of the expansion board, the personal computer side and the expansion board side should perform the diagnosis in cooperation with each other. However, the diagnosis can be performed more reliably than when the diagnosis is performed alone.
[0052]
However, in order to perform diagnosis in cooperation, it is necessary to provide means for notifying the start and end of diagnosis between the personal computer and the expansion board. This is because if the start and end of the diagnosis cannot be notified, even if one side starts the diagnosis, the other side does not know that the diagnosis has started, so a coordinated operation cannot be performed.
[0053]
As described above, when the expansion board is mounted in the expansion slot of the personal computer, the hardware on the personal computer side cannot be special. Therefore, when starting and ending the diagnosis, the diagnosis start / end must be notified using resources (memory, I / O, interrupt, etc.) normally used for data exchange between the personal computer and the expansion board. I must. Moreover, it is necessary to cope with the case where there is an abnormality in the resource itself used for notification.
[0054]
FIG. 5 shows a diagnosis start / end notification unit in the 2-port memory diagnosis apparatus according to the present invention. FIG. 5 shows the start / end notification unit of the diagnostic device diagnosis of the 2-port memory, which is actually used in combination with the 2-port memory diagnostic unit shown in FIG.
[0055]
The personal computer 10 embodies diagnosis start notifying means 35 and diagnosis end notifying means 36 by executing the above personal computer side software module. Diagnosis start notifying means 35 notifies the start of diagnosis from the personal computer 10 to the extension board 50, and diagnosis end notifying means 36 notifies the end of diagnosis from the personal computer 10 to the extension board 50. The expansion board 50 embodies diagnosis start confirmation means 75 and diagnosis end confirmation means 76 by executing the above-described expansion board side software module. The diagnosis start confirmation unit 75 confirms the diagnosis start notification from the personal computer 10, and the diagnosis end confirmation unit 76 confirms the diagnosis end notification from the personal computer 10.
[0056]
Diagnosis flag areas (1) to (n) are provided for the respective diagnosis areas (1) to (n) of the 2-port memory 53. The diagnostic flag areas (1) to (n) are predetermined areas for setting diagnostic flags in the two-port memory or other resources. In this example, a plurality of diagnosis flag areas are provided, but even when there is only one diagnosis flag area, the start / end of diagnosis can be notified.
[0057]
For simplicity, the diagnosis start operation will be described first in the case where there is only one diagnosis flag area (1). Further, a case where “(read data) −1” is used as the personal computer side conversion operation and “(read data) +1” is used as the expansion board side conversion operation will be described as an example.
[0058]
First, in order to notify the start of diagnosis, a value indicating the start of diagnosis, for example, “1” is written in the diagnosis flag area (1) by the diagnosis start notifying means 35 from the personal computer 10 side. The expansion board 50 side detects that “1” has been written in the diagnosis flag area (1) by the diagnosis start confirmation means 75 and knows that the diagnosis is started. Next, on the expansion board side, the expansion board side conversion operation is performed on the read data “1”. That is, “1 + 1” is calculated. Then, the value “2” obtained as a result of the calculation is written in the diagnosis flag area (1).
[0059]
On the other hand, on the personal computer 10 side, it is detected that the value of the diagnostic flag area (1) has changed to “2”, and the personal computer side conversion calculation is performed on the read data “2”. That is, “2-1” is calculated. As a result of the calculation, it is confirmed that the obtained value “1” matches the value “1” written from the personal computer 10 side first. If it is confirmed that the values match, the diagnosis is started normally.
[0060]
By performing the confirmation process in this manner, it is possible to confirm that the diagnosis start notification has been transmitted from the personal computer 10 side to the expansion board 50 side, and the diagnosis start notification has not been transmitted. The problem of being unable to diagnose does not occur. The diagnosis end notification and confirmation are performed in the same way.
[0061]
Next, the flow of processing for starting diagnosis will be described with reference to FIGS. 6 (a) and 6 (b). 4A shows a processing flow by the diagnosis start notifying unit 35 of the personal computer 10, and FIG. 4B shows a processing flow by the diagnosis start confirming unit 75 of the expansion board 50.
[0062]
In order to start the diagnosis of the expansion board 50 from the personal computer 10, the diagnosis start notifying means 35 first writes values indicating the start of diagnosis in all the diagnosis flag areas from the diagnosis flag area (1) to the diagnosis flag area (n). (Step S40). And it waits for the value of a diagnostic flag area to change (step S41). On the other hand, the diagnosis start confirmation means 75 on the expansion board 50 periodically confirms the value of each diagnosis flag area, and checks whether the diagnosis flag area has a value indicating the start of diagnosis (step S50). When a value indicating the start of diagnosis is found even at one location, the value in the diagnosis flag area is read out, and after reversible conversion (extension board side conversion), the value is written in the original diagnosis flag area (step S51).
[0063]
In response to the change in the value of the diagnosis flag area, the diagnosis start notification means 35 reads the value of the diagnosis flag area and performs reverse conversion (PC side conversion) (step S42). Then, it is confirmed whether or not the inversely converted value is equal to the value written in step S40 (step S43). If the values are equal, the diagnosis is started normally (step S45), and if they are not equal, the diagnosis is interrupted because there is an abnormality (step S46).
[0064]
Next, a flow of processing for ending diagnosis will be described with reference to FIGS. 7 (a) and 7 (b). 2A shows a processing flow by the diagnosis end notifying unit 36 of the personal computer 10, and FIG. 2B shows a processing flow by the diagnosis end confirmation unit 76 of the expansion board 50.
[0065]
In order to end the diagnosis of the expansion board 50 from the personal computer 10, the diagnosis end notifying means 36 first writes values indicating the end of diagnosis in all the diagnosis flag areas from the diagnosis flag area (1) to the diagnosis flag area (n). (Step S60). And it waits for the value of a diagnostic flag area to change (step S61). On the other hand, the diagnosis end confirmation means 76 of the expansion board 50 periodically checks the value of each diagnosis flag area and checks whether the diagnosis flag area has a value indicating the end of diagnosis (step S70). When a value indicating the end of diagnosis is found even at one location, the value in the diagnosis flag area is read out, and after reversible conversion (extension board side conversion), the value is written in the original diagnosis flag area (step S71).
[0066]
In response to the change in the value of the diagnosis flag area, the diagnosis end notification means 76 reads the value of the diagnosis flag area and performs reverse conversion (PC side conversion) (step S62). Then, it is confirmed whether or not the inversely converted value is equal to the value written in step S60 (step S63). If the values are equal, the diagnosis ends normally (step S64). If they are not equal, the diagnosis is interrupted because there is an abnormality (step S65).
[0067]
As described above, by using a plurality of diagnosis flag areas, even if some diagnosis flag areas are abnormal, an attempt was made to start or end the diagnosis, but the diagnosis flag area is normally terminated. The diagnosis can not be started or ended because the value indicated cannot be written, so that the diagnosis can be started or ended by a normal diagnosis flag area, and the value of the diagnosis flag area can be reversibly converted. By confirming the value, it can be confirmed that the value written in the diagnosis flag area is surely delivered to the other party.
[0068]
Embodiment 2. FIG.
FIG. 8 is a hardware configuration diagram showing another embodiment of the 2-port memory diagnostic device according to the present invention. 8, parts corresponding to those in FIG. 1 are denoted by the same reference numerals as those in FIG. 1, and description thereof is omitted. In this embodiment, a data conversion mode setting table 55 used for 2-port memory diagnosis is defined in the resource 54 in addition to the above-described embodiment.
[0069]
FIG. 9 shows the internal structure of the data conversion mode setting table 55 provided in the resource 54. The data conversion mode setting table 55 has a personal computer side data conversion mode setting table part A and an expansion board side data conversion mode setting table part B. Both the setting table parts A and B have a conversion operation specifier and a conversion operation. Each has n reversible transformation operation units consisting of values.
[0070]
In this embodiment, the personal computer side CPU 11 reads the 2-port memory diagnostic data conversion method from the data conversion mode setting table 55 provided in the resource 54, and stores the 2-port memory stored in the main storage device 12. Based on the diagnostic program, data reading comparison and writing with the 2-port memory 53 are executed. The same applies to the expansion board 50 side. The expansion board side CPU 51 reads the 2-port memory diagnostic data conversion method from the conversion mode setting table 55 provided in the resource 55 and stores it on the main storage device 52. Based on the port memory diagnosis program, data reading comparison and writing with the 2-port memory 53 are executed.
[0071]
When the personal computer side CPU 11 and the expansion board side CPU 51 read / write data to / from the 2-port memory 53, a 2-port memory diagnosis corresponding to the data conversion mode set in the data conversion mode setting table 55 is realized. The reversible conversion operation unit defined in the data conversion mode setting table 55 includes a conversion operation specifier that specifies an operation type for data conversion, and a conversion operation value that specifies an operation value when performing data conversion. .
[0072]
Various arithmetic types such as “sum”, “difference”, “product”, “division”, “bit shift”, “bit rotation”, “bit inversion” and the corresponding specifiers are stored in the personal computer side main storage device 12 and the expansion board side main memory. By registering in the device 52, the personal computer side CPU 11 and the expansion board side CPU 51 read the conversion calculation specifier and the conversion calculation value of the reversible conversion calculation unit set in the data conversion mode setting table 55. The data conversion formula can be calculated. For example, when a specifier corresponding to “sum” is set as the conversion calculation specifier and “1” is set as the conversion calculation value, each CPU calculates “read data + 1” as a data conversion formula.
[0073]
Also, when combining a plurality of calculation types, a plurality of reversible transformation calculation units are set in ascending order of numbers, and a clear setting is set for a reversible conversion calculation unit that is not used, so that each CPU reads out the reversible conversion calculation unit in order. Thus, it is possible to calculate a composite data conversion formula.
[0074]
As a result, it is possible to change the data conversion method in the data transmission / reception by the cooperation of the personal computer side CPU 11 and the expansion board side CPU 51 at the time of the 2-port memory diagnosis, and execute the 2-port memory diagnosis for several kinds of conversion modes. By doing so, more flexible diagnosis of the 2-port memory can be performed.
[0075]
Embodiment 3 FIG.
FIG. 10 shows a monitoring method of a personal computer for performing 2-port memory diagnosis according to the present invention. In FIG. 10, reference numeral 400 denotes a personal computer performing a two-port memory diagnosis, and 401 and 402 denote personal computers 400 and other personal computers on the same network line such as a LAN or a telephone line. Da represents a data flow for notifying the other personal computers 401 and 402 of the 2-port memory diagnostic information, and Db represents a data flow for obtaining the 2-port memory diagnostic information from the other personal computers 401 and 402.
[0076]
FIG. 11 is a flowchart for notifying other personal computers of 2-port memory diagnostic information (or accessing 2-port memory diagnostic information from other personal computers).
[0077]
After monitoring of the two-port memory diagnosis is started (step S80), a message is sent (or sent by e-mail) to the other personal computer 401 with the information, and the Internet homepage information file is updated (step S81). ). A user using the personal computer 401 periodically receives information on the 2-port memory diagnosis state from the personal computer 400 (data flow Da). In addition, the user of the personal computer 402 can appropriately access the homepage of the personal computer 400 from a WWW browser on the Internet and acquire information on the 2-port memory diagnosis status of the personal computer 400 (data flow Db).
[0078]
In the case of a physical memory failure, it is possible to detect the error immediately after the 2-port memory diagnosis. However, an error due to the access timing of the 2-port memory or a momentary power failure etc. can be diagnosed for a long time. There is a need to do. In this case, the 2-port memory diagnostic information over a long period of time can be notified to an arbitrary personal computer in real time, or the 2-port memory diagnostic information can be accessed from an arbitrary personal computer, thereby improving work efficiency. .
[0079]
【The invention's effect】
As can be understood from the above description, the two-port memory diagnostic apparatus according to the present invention Yo Then, the data reading means on the side of one of the first CPU and the second CPU reads the data in the 2-port memory. ,one The data conversion means on the CPU side The data reading means on one CPU side reversibly converts the data read from the 2-port memory, and the data writing means on one CPU side is on the side of one CPU. Data reversibly converted by data conversion means 2 Data reading means for writing to the port memory and on the other CPU side The data writing means on one CPU side reads the data written in the 2-port memory, and the other CPU side Data comparison means Is performed by the data conversion means on the other CPU side. Apply the inverse of the reversible transformation, The data writing means on the other CPU side wrote before the data reading means on the other CPU side read the data from the 2-port memory. Compared to data, if the data does not match, an error determination is made. Therefore, the diagnosis of the 2-port memory should be performed reliably by data transmission / reception by the cooperation of both CPUs without adding or changing special hardware. It is also possible to avoid writing the same data as the data already existing in the 2-port memory, and the data comparison means on the other side can invert the data to verify the consistency of the read data Become.
[0080]
According to the two-port memory diagnostic apparatus of the next invention, the data reading means on one side of either the first CPU or the second CPU causes data on the two-port memory by the data writing means on the other side. Monitors data changes in the 2-port memory due to writing and determines errors based on timeouts. Accurately detects abnormalities in 2-port memory due to timeouts in the other party's write wait time without adding or changing special hardware. can do.
[0081]
According to the two-port memory diagnosis device of the next invention, the first CPU notifies the second CPU by the diagnosis start notifying means, and the second CPU notifies the second CPU by the diagnosis start confirming means from the first CPU. Confirm the diagnosis start notification, notify the second CPU by the diagnosis end notification means from the first CPU, and confirm the diagnosis end notification from the first CPU by the diagnosis end confirmation means in the second CPU. From this, it can be confirmed that the notification of diagnosis start and diagnosis end was transmitted from the first CPU side to the second CPU, and the notification of diagnosis start and diagnosis end could not be transmitted. The problem of the inability to start or end is reliably avoided.
[0082]
According to the two-port memory diagnosis device of the next invention, a plurality of diagnosis flag areas are used, and even when some of the diagnosis flag areas are abnormal, the diagnosis can be started or ended with a normal diagnosis flag area. In addition, by performing reversible conversion on the value in the diagnostic flag area and confirming the value, it is possible to confirm that the value written in the diagnostic flag area has reached the other party.
[0083]
According to the diagnostic device for a two-port memory according to the next invention, it is possible to variably set the data conversion formula used in the reversible conversion of the read data by the data conversion means and the reverse conversion of the read data by the data comparison means. Therefore, flexible diagnosis of the 2-port memory can be performed.
[0084]
According to the 2-port memory diagnostic apparatus of the next invention, the 2-port memory provided on the expansion board mounted in the expansion slot of the computer can be diagnosed reliably.
[0085]
According to the monitoring device for 22 port memory diagnosis according to the next invention, the computer for performing the 2 port memory diagnosis by the diagnostic device for 2 port memory according to the above invention and another computer are communicably connected on the same network line. The monitoring of the status of the 2-port memory diagnosis can be notified to other personal computers via the network, or the information can be accessed from the other personal computers. It becomes easy to notify the personal computer and to access the 2-port memory diagnosis status information from another personal computer, and the work efficiency is improved.
[0086]
According to the two-port memory diagnosis method of the next invention, data is written to the two-port memory on either the first CPU or the second CPU side, and the other CPU side. One CPU side 2-port memory Read the data written to Read data In Reversible transformation Out And reversibly transformed data The Write to 2-port memory See On one CPU side, the other CPU side reads the data written in the 2-port memory, and the read data On the other CPU side Apply the inverse of the reversible transformation, Before the other CPU reads data from the 2-port memory, Write What Since data is compared and error determination is performed due to data mismatch, 2-port memory diagnosis can be performed reliably by data transmission / reception by the cooperation of both CPUs without adding or changing special hardware. In addition, it is possible to avoid writing the same data as the data already existing in the 2-port memory, and it is possible to verify the consistency of the read data by the data comparison means on the other side performing reverse conversion of the data. .
[0087]
According to the two-port memory diagnostic method of the next invention, the data of the two-port memory is written by writing data to the two-port memory on the CPU side of either the first CPU or the second CPU. Since the change is monitored and an error is determined by a timeout, an abnormality in the 2-port memory can be accurately detected by the timeout in the other party write waiting time without adding or changing any special hardware.
[0088]
According to the two-port memory diagnosis method of the next invention, the diagnosis start notification from the first CPU to the second CPU is notified, and the diagnosis start notification from the first CPU is confirmed in the second CPU. Since the end of diagnosis from one CPU to the second CPU is notified, and the second CPU confirms the diagnosis end notification from the previous first CPU, the diagnosis start notification and the diagnosis end notification are sent from the first CPU side. It is possible to confirm that it has been transmitted to the second CPU, and it is possible to reliably avoid the problem that the two-port memory diagnosis cannot be started or ended because the diagnosis start and diagnosis end notifications have not been transmitted.
[0089]
According to the two-port memory diagnosis method of the next invention, a plurality of diagnosis flag areas are used, and even when some diagnosis flag areas are abnormal, diagnosis can be started or ended with a normal diagnosis flag area. In addition, by performing reversible conversion on the value in the diagnostic flag area and confirming the value, it is possible to confirm that the value written in the diagnostic flag area has reached the other party.
[0090]
According to the two-port memory diagnosis method of the next invention, since the data conversion formula used in the reversible conversion of the read data and the reverse conversion of the read data is variably set, the diagnosis of the flexible two-port memory is performed. be able to.
[0091]
According to the two-port memory diagnosis method of the next invention, the diagnosis of the two-port memory provided on the expansion board mounted in the expansion slot of the computer can be reliably performed.
[Brief description of the drawings]
FIG. 1 is a hardware configuration diagram showing one embodiment of a two-port memory diagnostic device according to the present invention.
FIG. 2 is a software block diagram showing an embodiment of a two-port memory diagnostic device according to the present invention.
FIG. 3 is a block diagram showing an embodiment of a 2-port memory diagnostic unit in the 2-port memory diagnostic device according to the present invention;
FIGS. 4A and 4B are flowcharts of a diagnostic program in the two-port memory diagnostic apparatus according to the present invention.
FIG. 5 is a block diagram showing an embodiment of a diagnosis start / end notification unit in the two-port memory diagnostic device according to the present invention.
FIGS. 6A and 6B are flowcharts showing a flow of processing for starting diagnosis.
FIGS. 7A and 7B are flowcharts showing the flow of processing for ending diagnosis.
FIG. 8 is a hardware configuration diagram showing another embodiment of the two-port memory diagnostic device according to the present invention.
FIG. 9 is an internal configuration diagram of a data conversion mode setting table in the 2-port memory diagnostic device according to the present invention.
FIG. 10 is a system configuration diagram showing one embodiment of a monitoring device for 2-port memory diagnosis according to the present invention.
FIG. 11 is a flowchart showing monitoring processing for 2-port memory diagnosis according to the present invention.
FIG. 12 is a block diagram of a personal computer-side port diagnostic phase in a conventional diagnostic apparatus.
FIG. 13 is a block diagram of an expansion board side port diagnosis phase in a conventional diagnosis device.
FIG. 14 is a flowchart of a diagnostic program in a conventional diagnostic apparatus.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 10 Personal computer, 11 CPU, 12 Main storage device, 21 Diagnosis management module, 22 Data reading module, 23 Data conversion module, 24 Data writing module, 25 Data comparison module, 26 Diagnosis start notification module, 27 Diagnosis end notification module, 28 Conversion mode setting module, 29 Network communication module, 31 Data reading means, 32 Data conversion means, 33 Data writing means, 34 Data comparison means, 35 Diagnosis start notifying means, 36 Diagnosis end notifying means, 50 Expansion board, 51 CPU, 52 Main memory, 53 2-port memory, 54 resources, 55 Data conversion mode setting table, 61 Diagnosis management module, 62 Data reading module, 63 Data conversion module, 64 Data writing module , 65 Data comparison module, 66 Diagnosis start confirmation module, 67 Diagnosis end confirmation module, 68 Conversion mode acquisition module, 71 Data reading means, 72 Data conversion means, 73 Data writing means, 74 Data comparison means, 75 Diagnosis start confirmation means, 76 Diagnosis end confirmation means.

Claims (13)

In a 2-port memory diagnostic device accessible by both the first CPU and the second CPU,
The first CPU and the second CPU are:
And the write-free data reading means reading the data of the two-port memory written by the partner CPU side,
A data converting means for performing a reversible transform on the read data from the 2-port memory by said data reading means,
And write no-data write means to write the reversible transform data into two-port memory by said data conversion means,
Own CPU before the read data subjected to inverse transformation of the reversible transform of the data converting unit of the partner CPU side read- Mareta data applied by the data reading means, the data from the two-port memory by the current CPU side of the data reading means and data comparing means the side of the data writing means is compared with the write I write data to the two-port memory,
A diagnostic apparatus for a two-port memory, characterized in that an error determination is made based on data mismatch.   The data reading means on either one of the first CPU and the second CPU monitors the data change in the 2-port memory due to data writing to the 2-port memory by the data writing means on the other side, 2. The diagnostic apparatus for a two-port memory according to claim 1, wherein an error determination is made by a timeout. Diagnosis start notifying means for notifying the start of diagnosis from the first CPU to the second CPU;
Diagnosis end notification means for notifying the end of diagnosis from the first CPU to the second CPU;
A diagnosis start confirmation means for confirming a diagnosis start notification from the first CPU in the second CPU;
A diagnosis end confirmation means for confirming a diagnosis end notification from the first CPU in the second CPU;
The diagnostic apparatus for a two-port memory according to claim 1, wherein: Defining a plurality of determination flag area, the diagnostic start notification means writes the diagnosis start values for all decision flag area of a plurality, at least one value is diagnostic of the diagnostic start confirmation means a plurality of determination flag area If it becomes the start value, it is reversibly converted and written in the original determination flag area, the diagnosis start notification means reads it, performs reverse conversion of reversible conversion, and the value after reverse conversion is written in the determination flag area If it matches the diagnosis start value, the diagnosis starts normally, the diagnosis end notifying means writes the diagnosis end value in all of the plurality of judgment flag areas, and the diagnosis end confirmation means is at least one of the plurality of judgment flag areas. If one value becomes the diagnosis end value, it is reversibly converted and written in the original determination flag area, and the diagnosis end notification means reads it and performs reverse conversion of reversible conversion. Performed, the diagnostic device of the two-port memory according to claim 3, characterized in that the value after inverse transformation is completed successfully diagnosed if consistent with a diagnosis end value written to the determination flag area. A reversible transform to be applied to data read from the two-port memory by said data converting means the data reading means, said data comparing means said data reading means by mating CPU side of the data conversion means for subjecting the read data from the two-port memory is diagnostic apparatus of the two-port memory according to the data conversion formula to be used in the inverse transformation of the reversible transform to any one of claims 1 to 4, characterized in that it can be variably set to perform. Said first CPU is a CPU mounted in the computer, the second CPU is a CPU on the computer expansion slot mounted the expansion board of the diagnosis of the two-port memory provided in an expansion board The diagnostic apparatus for a two-port memory according to any one of claims 1 to 5, wherein:   A computer for performing two-port memory diagnosis by the two-port memory diagnosis device according to any one of claims 1 to 6 and another computer are connected to be communicable on the same network line. A monitoring device for two-port memory diagnosis, characterized in that the status monitoring of the computer can be notified to another personal computer via a network or information can be accessed from the other personal computer. In the diagnostic method for a two-port memory accessible by both the first CPU and the second CPU,
Either the first CPU or the second CPU writes data to the 2-port memory on the CPU side, and the other CPU side reads the data written to the 2-port memory by the one CPU side. and facilities reversible transformation on the read data, write the reversible transform data into two-port memory, said at one CPU side, the other CPU side reads the data written in the two-port memory, read the performing inverse transform of said other CPU side of the reversible transform to the data and compares the data they own CPU side is written write I before reading the data from this and the other CPU side is two-port memory, the error determined by data inconsistency A method for diagnosing a two-port memory, comprising: The CPU side of either the first CPU or the second CPU monitors the data change of the 2-port memory due to data writing to the 2-port memory by the other CPU side, and performs error determination by timeout. diagnostic method for two-port memory of claim 8, feature a.   Notification of diagnosis start from the first CPU to the second CPU, confirmation of diagnosis start notification from the first CPU in the second CPU, and from the first CPU to the second CPU 10. The diagnosis method for a two-port memory according to claim 8, wherein the second CPU confirms the diagnosis end notification from the first CPU. Defining a plurality of determination flag area, writes the diagnosis start value to the first all determination flag area from CPU side of a plurality of, if at least one value of the plurality of determination flag area for diagnosis start value , Reversibly transform it on the second CPU side and write it to the original judgment flag area, read it on the first CPU side and perform reverse transform of the reversible transform, and determine the value after the inverse transform If it coincides with the diagnosis start value written in the flag area, the diagnosis is started normally, and the diagnosis end value is written in all the plurality of determination flag areas from the first CPU, and at least one of the plurality of determination flag areas is written. If one of the values is the diagnosis end value, it is reversibly converted on the second CPU side and written to the original determination flag area, and is read on the first CPU side to reverse the reversible conversion. Performs two-port diagnostic method of the memory according to claim 10, the value after the inverse transform is characterized in that completes successfully diagnosed if consistent with a diagnosis end value written to the determination flag area. A reversible transform to be applied to read data from the 2-port memory, the claims data conversion formula to be used in the inverse transformation of the reversible transformation subjected the counterpart CPU performing the data read from the two-port memory, wherein the set variably The diagnostic method for a two-port memory according to any one of 8 to 11. Said first CPU is a CPU mounted in the computer, the second CPU is a CPU on the computer expansion slot mounted the expansion board of the diagnosis of the two-port memory provided in an expansion board The diagnostic method for a two-port memory according to any one of claims 8 to 12.

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