JPS62293437A - Information processor - Google Patents

Abstract

PURPOSE:To report even the detecting information of other error to a puperior hierarchy, by providing a means for masking the error detecting information. CONSTITUTION:LSIs (a), (b) having parts 31a1-2, 31b1-2, respectively, a holding part 35 for holding the error information from the respective LSIs, and an error report mask information holding part 37 for masking the error information from the respective LSIs are provided on a card. When an error is detected by the error detecting part 31a1 of the LSI (a), its flag is set to the corresponding bit of an error detecting flag holding part 32a, and the holding part 32a becomes a holding state. Since the error report mask information holding part 37 is usually set to '0', error detecting information passes through a gate 34a and held by the holding part 35 on the card. When the error detecting information from the LSI (a) is set to the corresponding holding part of the holding part 37, error detecting information generated by the LSI (b) is held by the holding part 35 through a gate 34b.

Description

Detailed Description of the Invention 3. Detailed Description of the Invention (Field of Industrial Application) The present invention relates to an RAS function of an information processing device, and particularly to an information processing device that takes into account the retention and transmission timing of error detection information.

((IE technology) First, the configuration of the prior art will be explained using drawings, and problems will be mentioned.

FIG. 3 is a diagram showing a circuit for holding and transmitting error detection information in a conventional information processing device.

In this example, there is a card equipped with m LSIs, and 0 cards constitute one board.
It is an information processing device with a structure.

Each LSI has an error detection means 21 that detects internal errors for each cause and generates flag information indicating that an error has been detected. By continuing to retain error detection flag information even after it has been removed, and at the same time not accepting error detection flag information from other causes, it has a function that retains only the detection flag of the first detected error factor. It consists of an error detection flag holding means 22, and error detection information transmission means 23 and 24 for transmitting the .# information from the error detection flag holding means to the error holding means of the collective card for each LSI. Furthermore, each card or each board receives error detection information from the LSI level or card level, and retains that information while at the same time not accepting error detection information from other LSIs or cards. error detection flag information holding means 25 or 28 that holds only error detection flags from the LSI or card;
and transmitting means 26 and 29 for collecting the information from the holding means and transmitting the error detection information to a higher-level device.

When an error occurs in such an information processing apparatus due to a certain factor such as ℃ and LSILl, the error detection means 21 detects the error, sets an error detection flag in the error detection flag holding means 22, and holds the holding means 22 at the same time. Furthermore, after one machine cycle, the error detection information is propagated to the error detection flag information holding means 25 and held therein. Furthermore, after one machine cycle, the error information is similarly propagated to the error information holding means 28 and held there.

After this, even if an error other than this error occurs, it will not be newly registered because all the error detection information holding means are held as described above.

(Problems to be Solved by the Invention) In the RAS function of the conventional information processing device described above, detected errors are reported unconditionally to the hierarchy, and once an error is reported to a certain unit in the upper hierarchy, Once detection information has been reported, the next error detection information to be reported for the same unit cannot be accepted. Therefore, when one error factor occurs, the device usually stops operating at that point, making it impossible to check subsequent operations. Further, even if the operation is forced to continue, the error detection flag for another error factor that occurs next cannot be set and recognized because the flag holding means is held.

An object of the present invention is to provide an information processing apparatus that can mask error detection information in any hierarchy and report detection information of other errors to the upper hierarchy.

(Means for Solving the Problems) In order to achieve the above object, an information processing device according to the present invention detects data and control errors for each cause in each unit of the lowest layer in a hierarchical structure of logic or implementation units. and an error detection means that generates flag information indicating that an error has been detected, and an error detection means that receives the flag information generated by the error detection means and continues to hold the error detection flag information even after the error cause is removed. By not accepting error detection flag information from other factors at the same time! 1l
Error detection that collects information from error detection flag holding means that holds only the detection flag of the error factor detected for the first time in tL and error eruption flag holding means of each unit of the lowest layer and transmits it to the upper 18I layer. Each unit in the middle layer also receives the error detection information transmitted from the subordinate units, retains this information, and at the same time does not accept error detection information from other subordinate units 71. By doing this, the error detection flag information holding means that holds only the error detection flag transmitted from the lower layer first and the information from the error detection flag information holding means are combined, and the error detection flag is transmitted to the higher layer. detection f#
In an information processing device having a transmission means for transmitting information,
A mask information input means for inputting mask information, a mask information holding means for holding the mask information from the mask information input means, and an error detection flag information input based on the mask information of the mask information holding means in one of the layers. This is accomplished by providing an error detection flag report masking means for masking.

(Central example) Next, the present invention will be explained with reference to the drawings.

FIG. 1 is a block diagram showing an embodiment of an information processing VC device consisting of three layers: LSI, card, and board. In this example, m LSIs are mounted on a card, and one of the cards is connected to a board.

The LSI, which is the lowest layer of the configuration, includes an error detection unit 1 that detects data and control errors by cause and generates flag information indicating the error, and a flag that receives the flag generated by the error detection unit 1. Once the error detection information is set, the information from the error detection flag holding s2, which has the function of holding itself so as not to accept subsequent error flags, and the error detection flag holding s2 are summarized and sent to the upper level as LSI proxy light information. An error detection information transmitting means 3 is provided for transmitting error detection information to cards in the hierarchy.

The upper layer card or board receives error information transmitted from the lower layer LSI or card, and holds the error detection flag of the upper layer, which has the function of holding itself when error detection information is set. 5 or 8, and an error detection information transmission section 64 or 9 of an upper layer that collects the information from this storage section and transmits the error detection information to a higher layer.

The intermediate layer card has an error detection flag masking gate 11 for masking error detection flag information input in its error detection information input section, a mask information holding section 10 for holding mask information given to the masking means, and a mask information holding section 10 for holding mask information to be given to the masking means. A mask information input section 12 is provided for setting mask information in the holding s10.

Note that in this embodiment, a scan path is used as the input means.

FIG. 3 is a circuit diagram showing one card on which two LSIs are mounted. For simplicity, the operation shown in FIG. 1 will be explained using FIG. 3.

It goes without saying that the following description of the operation will be the same even if the number of LSIs and cards increases or the hierarchy becomes deeper.

Further, the layer in which the error detection flag is masked is arbitrary, and an embodiment in which masking is performed in a plurality of layers is also conceivable.

Now, if an error is detected by the error detection section 31at of the LSIa, the flag is set in the corresponding bit of the error detection flag holding section 32H, and the holding section 32a is placed in a hold state.

Next, the error report mask information holding m37 normally contains Vi, a
Since llO is set, this error detection information passes through the gate 34a, and the error detection information from L8I is set as is in the corresponding bit of the error detection flag holding section 35 of the card and held! 1535 is in a hold state. This error detection information is further transmitted to a higher layer (not shown).

Here, when an error caused by another factor is detected in the LSIb, this error detection flag is set in the corresponding bit of the same holding unit 32b, and reaches the error detection flag holding unit 35 through the error flag transmission m33b and the gate 34b. do. However, since the holding unit 35 has already been held due to an error in LSIa, the error detection information for LSIb is not set, and the error detection information for LSIb cannot be recognized at any higher level, and the error detection flag is not set later. It is only when the holding capital 32b is examined that it becomes clear that an error has occurred.

Therefore, in order to know the timing of an error occurring in LSIb, information for masking the error detection flag reported from LSIa is set in the error report mask information holding capital 37. Here, as in the case described above, first LS
Even if an error occurs in Ia, this error detection flag is set in the flag holding 7132a, and the transmission unit 3
3a and reaches the gate 34a, but since mask information for disabling the gate 34 is set in the error report mask information holding unit 37, the error detection information is masked here and ignored. Therefore, the LSIa error is not set in the card-level error detection flag retainer 35, and is not transmitted to any higher hierarchy.

If an error occurs in LSIb in this state, the LS
As in the case where an error occurs in Ia, the next item error detection information is reported to the upper layer, and the timing of the occurrence can be known.

(Effects of the Invention) As described above, when the hierarchical device according to the present invention sequentially transmits errors detected at the lowest J-detector to the upper floor f-, error information is transmitted to an appropriate hierarchy in the middle. Since a masking means is provided and the error reporting line can be masked based on the mask information to suppress any error reporting, there is an effect that the device inspection can proceed smoothly.

[Brief explanation of the drawing]

FIG. 1 is a block diagram showing an embodiment of an information processing device according to the present invention, FIG. 2 is a diagram showing the configuration of a card equipped with two LSIs, and FIG. 3 is a block diagram showing an embodiment of a conventional information processing device. It is a diagram. 1 * 21 , 31 at ~bz-x error detection section 2
．． 5.8, 22.25, 28.32a, b, 35...
Error detection flag retention capital 3.6, 9, 23, 26, 29. 33a, b, 36...
・Error detection information transmission unit 4.24, 7.27...Error detection information transmission line 1
0.37...Error report mask information holding unit 11.34
a, b...Error detection flag report mask gate 12...Mask information input means Patent applicant NEC Corporation Agent Patent attorney Inoro Jusai 1a 2nd figure 3rd figure

Claims (1)

[Claims] Error detection means for detecting data and control errors for each factor in the lowest layer unit in a hierarchical structure of logic or implementation units, and generating flag information indicating that an error has been detected; and the error detection means By receiving the flag information generated by , and continuing to hold the error detection flag information even after this error cause is removed, at the same time not accepting error detection flag information from other causes,
Error detection flag holding means for holding only the detection flag of the first detected error factor, and error detection information transmission means for collectively transmitting information from the error detection flag holding means of each unit of the lowest layer to the upper layer. Each unit in the middle layer also receives error detection information transmitted from the lower layer unit, holds this information, and at the same time prevents receiving error detection information from other lower layers. an error detection flag information holding means for holding only the error detection flag transmitted from the lower layer; and a transmission means for collecting the information from the error detection flag information holding means and transmitting the error detection information to a higher layer. In an information processing apparatus having a mask information input means for inputting mask information into any layer, a mask information holding means for holding the mask information from the mask information input means, and a mask information holding means for the mask information holding means. An information processing apparatus comprising: error detection flag report masking means for masking input of error detection flag information.