JPS59221723A - Reporting system of completion of initialization for input and output controller - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed description of the invention] (a) Technical field of the invention Whether the power-on sequence or system reset initialization completion state in the input/output device or input/output control device has been completed normally or whether there has been an abnormality. This invention relates to a method for reporting completion of initialization of an input/output control device by displaying status information.

(b) Background of the technology As the use of computer systems has become more sophisticated and complex, there is a strong demand for high reliability of the entire system, and as much as possible, error information that occurs and is discovered in each device that makes up the system is collected. It has become necessary to ensure the reliability of the entire system by collecting as much detail as possible, even if the details are ugly.

In particular, there is a need for the development of a method for recording and understanding detailed abnormal state information in input/output devices and input/output control devices that directly record/reproduce information.

(c) Conventional technology and problems Conventionally, the power-on sequence of input/output devices and input/output control devices and the execution results of system reset were not notified at all, and the first startup was completed normally after these initializations were completed. It only turns out that the initialization is finished by
The drawback is that it is not possible to distinguish between whether initialization has completed normally or whether there is some kind of abnormality.

(d) Purpose of the Invention The object of the present invention is to provide a new initialization completion reporting method for an input/output control device that eliminates the above-mentioned drawbacks, and in particular, to ensure that initialization is completed normally at the end of a power-on reset or system reset. By actively reporting from the input/output control device to the higher-level device whether the process has finished or if there was an error,
The object of the present invention is to realize an initialization completion reporting method for an input/output control device that provides judgment criteria for realizing appropriate processing by a monitoring program of a host device.

(e) Structure of the Invention The present invention provides an input/output control device that controls an input/output device based on an instruction from a host device, the power-on sequence of the input/output device, the training input/output control device, and the system reset from the host device. Initialization of the input/output control device that reports status information indicating whether the initialization state according to the instruction has ended normally or abnormally, that is, information for early detection of an abnormality in the input/output device or training input/output control device to the higher-level device. This can be achieved by using the completion report method.

(f) Examples of the invention The present invention will be explained below with reference to the drawings.

FIG. 1 shows a system block diagram of a disk controller according to an embodiment of the present invention.

In the figure, 1, 2.3 are channels A, B, and C14 are disk controllers, 5 is a logic operation section, 6 is a channel interface section, 7 is a device interface section, 8 is a data control section, and 9 is a controller 1-control. A memory section, 10 is a loader section, and 11, 12.13 are disk devices 0, 1.2, respectively.

The system in this figure is comprised of channels 1 and 2 that control the flow of information between the main controller (not shown) and the disk controller 4.
, 3. The standard form of control provided by channels 1, 2.
．． 12.13 Disk control device 4 converts into a format compatible with 12.13, logic operation section 5 that calculates information from channels 1, 2.3 and stores it in a register, signal transmission/reception with channels 1, 2.3 9 selection , a channel interface unit 6 that controls data transfer, a device interface unit 7 that sends and receives signals to and from the disk devices 11, 12, and 13, a data control unit 8 that controls data transfer routes, and stores microprograms in memory. It is comprised of a control memory section 9 for accessing memory, a loader section 10 for loading microprograms into the control memory, and disk devices 11, 12, and 13 for recording/reproducing information on a recording medium.

The disk controller 4 has a plurality of channels (channel 1 .
2. 3 etc.). Now, assume that channel 1 instructs disk controller 4 to perform a system reset. When the disk control device 4 detects a system reset instruction through the logic operation section 5 via the channel interface section 6, it initializes the control information of the disk control device 4 and initializes the logic circuits of the plurality of connected disk devices 11, 12, and 13. The process is executed by the device interface section 7.

During this series of initializations, the process continues unless an abnormal condition (for example, power cutoff, etc.) in which the disk control device 4 cannot operate occurs. However, during this time, if on the hardware,
When a software failure or error is detected by the disk controller 4, information regarding the abnormal state is stored in the control memory section 9, and this stored information is stored when all initialization work is completed. Based on this, the device interface section 7, data control section 8, etc. determine whether the termination is normal or abnormal, and the disk control device 4 issues an [interrupt request (refwest signal)] to the channel 1. Channel l does not respond to this "interrupt request (refwest signal)" [selection signal (select signal)]
When the channel interface section 6 receives the "status information", the disk controller 4 displays "status information" and transfers it to the channel 1.

In the case of a system reset, [status information] is sent only to channel 1 which has instructed the system reset.
", but in the case of a power-on sequence, the transfer is notified to all connected channels or only to the channel that first received the "interrupt request (refwest signal)".

(g) Effects of the invention Conventionally, there was no concrete way to check whether the initialization of an input/output control device or input/output device was completed normally or whether there was an abnormality, so the input/output device could be used normally. However, with the present invention, "status information" of normal termination and abnormal termination
By displaying the information, an abnormal state can be detected and processed at an early stage, so that the input/output control device and the input/output device can be used efficiently.

[Brief explanation of the drawing]

FIG. 1 shows a system block diagram of a disk controller according to an embodiment of the present invention. In the figure, 1, 2.3 are channels A, B, and C. 4 is a disk control device, 5 is a logic operation section, 6 is a channel interface section, 7 is a device interface section, 8
Reference numeral 11 and 12.13 indicate a data control section, 9 a control memory section, 10 a loader section, and disk devices 0 and 1.2, respectively. 1 mouth of cod

Claims (1)

[Claims] The input/output device is controlled by instructions from a host device. In the input/output control device, the power-on sequence of the input/output device, the input/output control device, and the initialization state due to the system reset instruction from the host device are reported to the host device, status information indicating whether the initialization has ended normally or abnormally. A method for reporting the completion of initialization of an input/output control device.