JPS63181054A - Device for monitoring state of system extending device - Google Patents

Abstract

PURPOSE:To segment an adapter for extension causing a fault and to obtain high reliability, by analyzing the trace content of a tracer even when an extension bus falls in an inoperable state, in other words, even when it hangs up. CONSTITUTION:The tracer 8 traces the data of the extension bus 7, a DMA request from an extension adapter 5-2 or 5-k to a system extension device 3, the response signal of the DMA request from the system extending device 3 to the adapter, and the data of DMA data transfer, etc., at every DMA operation. Therefore, even when the extension bus 7 hangs up and the tracing of the tracer stops automatically, the tracer 8 traces and stores the extension adapter operating or to be operated at the time of hang-up and the operating content of the DMA with the adapter up to that time at every DMA operation. A bit of trace information stored in the tracer 8 is read out and displayed by a display means 9. In such a way, it is possible to specify in which adapter an error is generated, and to recognize a bit of data information on the extension bus 7 at that time.

Description

[Detailed Description of the Invention] [Summary] A system comprising a basic bus and an expansion bus provided with functions equivalent to the basic bus by a system expansion device, and an expansion adapter connected to the expansion bus connected to the expansion bus through the system expansion device. In an expansion system configured to be connected to a basic bus, the history of each expansion adapter connected to the expansion bus is stored in the IDM.
A tracer is provided on the expansion bus to trace each A operation, and a display means is provided to display the history contents traced by the tracer. By analyzing the contents, the expansion adapter that caused the failure can be isolated and the high reliability of the expansion system can be ensured.

[Industrial application field]

The present invention relates to a status monitoring device for a system expansion device.

Particularly in an expansion system configured to expand the system by including an expansion bus with functions equivalent to the basic bus via a system expansion device.

The present invention relates to a status monitoring device for a system expansion device, which is equipped with a tracer that traces the employment history of each expansion adapter connected to an expansion lot, so that adapters caused by hang-up can be quickly detected.

[Conventional technology]

A conventional expansion system that expands the system using a system expansion device was configured as shown in FIG. That is, code 1 is the CPU and 2 is the memory.

Reference numeral 3 represents a system expansion device, 4-1 to 4- represent adapters, 5-1 to 5- represent adapters, 6 represents a basic bus, and 7 represents an expansion bus.

The system expansion device 3 is a device that expands the expansion bus 7 subordinate to the system expansion device 3 with the same function as the basic bus 6, and expansion adapters 5-1 to 5-k are connected to the expansion bus 7. ing.

These expansion adapters 5-1 to 5- are DMA adapters like the adapters 4-1 to 4- connected to the basic bus 6, and are connected to the basic bus 6 via the system expansion device 3. Ru.

The principle of connection operation will now be explained with reference to FIG.

Adapter consisting of on expansion bus 7, e.g. adapter 5- to #
When k performs a DMA transfer, the adapter 5-k sends a DMA request, that is, a bus mastership request signal (BRm) (2) of the expansion bus 7, to the expansion bus 7 at #. Upon receiving BRm, the system expansion device 3 sends a bus control request signal (BRn) (2) of the basic bus 6 onto the basic bus 6. After that, the bus use permission signal (BGn) from basic bus 6 to basic bus 6
When the system expansion device W3 receives this, the system expansion device 3 receives the bus use permission signal (BC,
m) Send ■ to the expansion bus 7. When the adapter 5-k receives M 100m as #, the system expansion device 3 transmits the bus busy signal B to the expansion bus 7 and basic bus 6.
Send BSY■ and ■, respectively. Then, data is transferred (DM) to adapter 5- via system expansion device 3
A transfer) ■ starts.

Note that n in Rn and BGn represents the priority on the basic bus 6, and m in BRm and BGm represents the priority on the expansion bus 7.

The operation of other expansion adapters is exactly the same as described above.

[Problem that the invention seeks to solve]

As mentioned above, in the conventional system expansion device 3.

BRm on the expansion bus 7 is sent as BR to the basic bus 6, and BGn on the basic bus 6 is sent as BG on the expansion bus 7. Therefore, from the basic bus 6, the BR, BG for the system expansion device 3 The configuration was such that only one of each signal could be recognized. In other words, #2 adapter 5-2 for expansion
BRm from the system expansion device 3, and BRm from the adapter 5-k for expansion #
is sent to the basic bus 6, and conversely, the BG from the basic bus 6 is sent to the basic bus 6.
n is #2 adapter 5 for expansion connected to expansion lotus 7
-2 to #, all adapters 5- are specified (sent to the system expansion device 3).

Therefore, if the expansion bus 7 hangs up.

From the basic bus 6, it can only be determined that the error is in the system expansion device 3, and there is a drawback that it is not possible to identify which expansion DMA adapter on the expansion bus 7 is causing the error.

Therefore, if an error occurs in an expansion adapter, there is a need for a system expansion device status monitoring device that can quickly identify the error-prone adapter.

[Means for solving problems]

FIG. 1 shows a basic configuration diagram of a status monitoring device for a system expansion device according to the present invention, and reference numerals 1 to 7 correspond to those in FIG. Reference numeral 8 represents a tracer, and 9 represents a display means.

The tracer 8 receives a DMA request from each expansion adapter on the expansion bus 7 to the system expansion device 3, that is, a response signal to the requesting adapter in response to the bus mastership request signal BRm of the expansion bus 7, that is, a bus mastership request signal BRm of the expansion bus 7. The usage permission signal BGm is traced for each IDMA operation, and when the expansion bus 7 is hung up, the tracing is automatically stopped. The above trace function has a function that stores the adapter that is in operation or is scheduled to operate during a hang amplifier and the DMA add-on up to that point for each DMA operation. When the trace information is updated, the trace information is updated sequentially from the oldest to the newest.

The display means 9 is capable of always reading and displaying the trace information held in the tracer 8 regardless of the state of the expansion bus 7.

[Effect]

The expansion adapters 5-2 to 5-k connected to the expansion bus 7 are connected to the basic bus 6 via the system expansion device 3, and DMA transfer is started.The operation is the same as that shown in FIG. 9. Therefore, its explanation will be omitted.

On the other hand, the tracer 8 is each data on the expansion bus 7.

That is, a DMA request from the expansion adapters 5-2 to 5-k to the system expansion device 3, a response signal from the system expansion device 3 to the adapter for the DMA request, and a DMA
Each data, etc. of data transfer is traced for each DMA operation. Therefore, even if the expansion bus 7 hangs up and its tracing is automatically stopped, the expansion adapter that is in operation or scheduled to operate at the time of the hang-up and the DM
The tracer 8 traces and stores the contents of the operation with the adapter A by reading and displaying the trace information stored in the tracer 8 with the 0 display means 9 for each DMA operation. Not only can it be determined whether an error has occurred, but also the data information on the expansion bus 7 at that time can be known.

〔Example〕

An embodiment of the present invention will be described below with reference to the drawings.

FIG. 2 shows the configuration of an embodiment of a status monitoring device for a system expansion device according to the present invention.

In FIG. 2, reference numeral 1. 3. 5-1. 5-2°..., 5-, 6.7 correspond to those in FIG. 3 and FIG. 1, and 8 corresponds to that in FIG. 10 is a comparison circuit, 11 is a system expansion section, 12 is an interface circuit, 13 is a decoder, 14 is a trace timing circuit, 15 is a readout circuit, and 16 is a panel display device.

In the figure, there are two adapters 5-k for expansion #1 adapter 5-1 to ##, but they are the same, and in order to make the following operation explanation easier to understand, they are separated by input. It was removed.

The system expansion device 3 has a comparison circuit 10. System expansion section 1
1 and an ink face circuit 12. The comparison circuit 10 is a circuit that determines the priority of bus control from each of the expansion adapters 5-1 to 5-k connected to the expansion bus 7, and the system expansion unit 11 is a circuit that prioritizes bus control from the expansion adapters 5-1 to 5-k connected to the expansion bus 7. The interface circuit 12 is a circuit that connects the system expansion device 3 and the basic bus 6.

The decoder 13 is an expansion D connected to the expansion bus 7.
MA adapter 5-1 to 5-k.

For example, it is a circuit that converts to hexadecimal, and the tracer 8 is a circuit that traces and holds the trace information of the expansion DMA adapter connected to the basic bus 6 for every 1 DMA operation as described above, and the panel display Device 16 is readout circuit 1
This device displays the trace information stored in the tracer 8 via the tracer 5.

What is the operation of an expansion adapter that performs DMA transfer?

It is as follows. That is, the bus mastership request signal BRm of the expansion bus 7 is sent from each of the expansion adapters 5-1 to 5-k on the expansion bus 7 to the system expansion device 3. Here, the comparison circuit 10 determines the priority order of the bus mastership, and in this determination, the signal with the highest priority among each BRm (the higher the value of m of BRm, the higher the priority, Adapter 5-1 to 5-k for expansion
) is sent to the interface circuit 12 in the system expansion device 3 as a BR.

The interface circuit 12 that received the BR
BRn (n is the priority of the basic bus 6) is sent onto the basic bus 6.

If CPU 1 permits the use of basic bus 6.

A bus use permission signal BGn is sent onto the basic bus 6, and the ink face circuit 12 receives the BGn, thereby sending the BG to the system expansion unit 11. The system expansion unit 11 sends the expansion bus 7 use permission signal BGm to the expansion adapter whose bus control request has a high priority, and
When the adapter for expansion receives Gm, the system expansion device 3 outputs a bus busy signal BBSY to the expansion HAS 6. As a result, the expansion adapter starts DMA transfer. At this time, the system expansion device 3 also outputs the bus busy signal BBSY to the basic bus 6. The above operations are as explained in FIG. 1.

On the other hand, regarding the expansion bus 7, the decoder 13 converts the BRm on the expansion bus 7 into a hexadecimal number at any time and sends it to the tracer date. The tracer 8 is connected to each expansion adapter 5-1 to 5.
The data from the decoder 13 is stored as trace information at the timing of the BBSY sent by -k, that is, the BBSY timing signal (in IDMA units) sent by the trace timing circuit 14. trace this.

Adapters for expansions currently in operation or scheduled to operate.

I This is done for the expansion adapter before the DMA unit.

The trace information of the expansion adapter traced by the tracer 8 is displayed on the panel display device I6 via the readout circuit 15, or is displayed on the panel display device I6 via the readout circuit 15, or is displayed on the line 17 connected to the host CPU for secondary explanation. In this way, recovery processing after a hung amplifier can be handled quickly.

Then, when the three system expansion devices are hung up, the CPU 1 uses the BR for the system expansion device 3.
, BG signals, it is not known which extended DMA adapter has stopped operating or was scheduled to operate.

The tracer 8 is capable of displaying its trace contents regardless of the state of the expansion bus 7, and the panel display device 16 that displays the trace information of the tracer 8 shows the hang-up based on which expansion adapter. can be easily found out. Therefore, the faulty expansion DMA adapter on the expansion bus 7 can be easily isolated.

〔Effect of the invention〕

As explained above, according to one aspect of the present invention, even if the expansion lotus hangs up, it is possible to easily identify an expansion adapter that is in operation or scheduled to operate at the time of a hung amplifier, and an expansion adapter that is 1 DMA unit earlier. This makes it easy to isolate the failed expansion adapter, and also facilitates recovery processing from the host CPU.
It is possible to construct a highly reliable system.

[Brief explanation of the drawing]

FIG. 1 is a basic configuration diagram of a status monitoring device for a system expansion device according to the present invention, FIG. 2 is a configuration diagram of an embodiment of the status monitoring device for a system expansion device according to the present invention, and FIG. 3 is a diagram of a conventional expansion system. In the block diagram, No. 40 shows a time chart of each signal to explain the operation of the conventional system expansion device. In the figure, l is CPo, 2 is memory, 3 is system expansion device, 4-1 to 4- is adapter, 5-1 to 5- is adapter, 6 is basic bus, 7 is expansion bus, 8 is tracer , 9 is a display means, 10 is a comparison circuit, 11 is a system expansion section, 12 is an ink face circuit, 13 is a decoder, 1
4 is a trace timing circuit, 15 is a readout circuit, 1
6 represents a panel display device. Patent Applicant Panafacom Co., Ltd. Patent Attorney Agent Mori 1) Hiroshi (1 other person) Barren August Moon P Tamari 11 Moaning Bun L Ha Ka 1 Figure ¥ Ya Return Line 712 Hi No. 3 N Erto Diagram

Claims (1)

[Claims] A basic bus (6) to which a plurality of adapters (4) are connected, a system expansion device (3) connected to the basic bus (6) for system expansion, and a plurality of is connected to the expansion adapter (5) of the system expansion device (
3) and an expansion bus (7) that is subordinate to the system expansion bus (7), which has the same function as the basic bus (6) via the system expansion device (3), expands the DMA transfer of the system. In the expansion system configured as follows, a tracer (8) traces the history of each expansion adapter (5) connected to the expansion bus (7) for each DMA operation.
is provided on the expansion bus (7), and a display means (9) is provided for displaying the history contents traced by the tracer (8), and each expansion adapter (5) connected to the expansion bus (7) A status monitoring device for a system expansion device, characterized in that the status monitoring device monitors the status of the system expansion device.