JPS61250756A - Control system for main storage initializing - Google Patents

Abstract

PURPOSE:To cope with plural modes of main memory initializing with same control by providing a control information load section and a mode designation section to a service processor to form the interface information in response to the control mode. CONSTITUTION:The control information load section 20 is started from a console 5 and loads the control information read from a floppy disc storage device 6 on a fixed storage area 22 of a main storage device 3 and takes over the control to a mode designation section 21. The mode designation section 21 selects the interface information of a prescribed form decided in the designated control mode from the console 5, loads it as interface information 23 on a prescribed area in the storage area 22 and starts a CPU 1. The CPU 1 executes the initializing program to initialize the control mode designated in the interface information 23.

Description

[Detailed Description of the Invention] [Summary] This is an initialization control method for a main storage device in a computer system. Load initialization control information that matches the control program from the service processing device to the fixed storage area of the main storage device,
The control program, through a certain interface,
By receiving the required initialization process specification information and executing the initialization process, the flexibility of the initialization process content is increased.

[Industrial application field]

The present invention relates to an initialization control method for a main storage device in a computer system.

Initialization of the main memory of a computer system includes clearing all storage areas of the main memory to ``0'', loading control microprograms, and loading control information for hardware such as channel devices to predetermined storage areas. .

Normally, these initialization processes are performed under the control of a service processing device that performs system monitoring, configuration control, and the like.

[Prior art and problems to be solved by the invention] FIG. 3 is a block diagram of an example of the configuration of a computer system.

A central processing unit (hereinafter referred to as CPU) 1 is connected to a main storage device 3 via a storage control device 2 .

A service processing device (hereinafter referred to as SVP) 4 is also connected to the main storage device 3 by the storage control device 2 and can also access the CPUI.

At the beginning of system startup, such as when powering on a computer system based on a command from the console 5 connected to the 5VP4, the 5VP4 first clears the entire storage area of the main storage device 3 to, for example, 0. 1. Flotspie disc memory device? Predetermined control information is read from 1!6 and stored in a predetermined storage area 7 of the main storage device 3 (FIG. 4(a)).
).

The control information to be loaded includes, for example, a CPU firmware area, other microprogram areas, and a hardware control area such as a subchannel word of a channel device, as shown in FIG. 4(a), for example.

In such a load area arrangement, as shown in the figure,
The main memory area 8 from address "0" to address α of the main memory device 3 is used by the software, and the control information storage area 7 occupies a higher address area.

However, as shown in FIG. 4(b), in the case of other systems, the storage area 9 at the lower address is used as the control information area, and the area at a higher level is used as the address consisting of the main memory address °O''. A different arrangement and area is required, such as a main storage area 10 that takes up to β.

In the same computer system, such different storage area allocation usage modes are often selected and used during operation, and conventionally in such cases, 5VP4 has been configured with separate settings for each mode. Since an initialization control function is provided, the configuration of 5VP4 is complicated.

Furthermore, according to the above control, even when it is necessary to save the storage area 7 in FIG. 4(a) and clear only the storage area 8 in order to restart the system, the simple method of 5VP4 can be used. Because the system clears all areas and reloads control information for
The problem was that it was unreasonably long.

[Means for solving problems]

FIG. 1 (al is a block diagram showing the configuration of the present invention).

5VP4, control information loading section 20, mode specifying section 21
will be established.

[For production]

The control information loading section 20 is activated from the console 5, loads the control information read from the floppy disk storage bag W6 into the fixed storage area 22 of the main storage device 3, and passes control to the mode specifying section 21.

The control information includes an initialization program executed by the CPUI.

The mode specifying unit 21 selects interface information in a predetermined format defined for the control mode specified from the console 5, loads it into a predetermined area in the storage area 22 as the interface information 23, and starts the CPUI.

The CPU Ul executes an initialization program and initializes the control mode specified in the ink face information 23.

As the control mode, designation of the arrangement corresponding to FIGS. 9(a) and 9(b), clearing of only the storage area 8 or 10, etc. can be provided.

With the above control configuration, the 5VP4 can support multiple modes of main memory initialization with the same control by creating interface information according to the control mode.

〔Example〕

In FIG. 1 (al), the control information loading section 20 of the 5VP4 starts up according to the specification from the console 5, reads out the initialization control information stored in the floppy disk storage device 6, and stores the fixed information in the main storage device 3. Load into storage area 22.

The initialization control information is, for example, CPU firmware 8ff.
area 30, other microprogram areas 31, and hardware system? II jJ [consists of area 32 etc., CPU
The firmware area 30 includes an initialization program.

When the control information loading section 20 finishes loading into the storage area 22, it passes control to the mode specifying section 21.

The mode specifying unit 21 has interface information prepared in advance for each control mode, for example, and selects predetermined interface information according to the mode specification input from the console 5, and selects the interface information in the CPU 7 armware area 30.
It is loaded as the interface information 23 into a fixed area provided at a fixed relative address.

The interface information 23 includes, for example, an 8-byte program status word 33 and a completion code section 34, as shown in FIG.
, command code section 35, storage address, data, etc.
This is 32-byte information consisting of a parameter section 36 that can specify up to 32 characters.

The program status word 33 includes information that defines the execution environment of the CPU firmware, including the entry address of the initialization program of the CPU firmware 30, that is, the contents of various control registers of the CPU 1, etc.

Therefore, the mode specifying unit 21 uses the interface information 23
When loaded, the program status word 33 is loaded into the CPUI using a known CPU monitoring function or the like, thereby causing the CPUI to start executing the initialization program.

The initialization program determines the control mode using the command code section 35 of the interface information 23, executes the specified initialization process using the information in the parameter section 36, and when finished, sends the completion status to the completion code section 34. Set a predetermined code (for example, °0” for normal termination) to indicate the 5V
For example, an interrupt is generated in P4.

5VP4 is the completion code part 3 of the interface information 23
4 to know the processing result and proceed to the next processing.

For example, in the first control mode, the initialization program simply executes the main storage area 37 of the main storage device 3 in FIG.
Clear only. Therefore, this function can also be used to clear only the main storage area 37 after operation once, and it is possible to speed up so-called partial clearing.

Further, for example, in the second control mode, the initialization program executes the CP of FIG. 1 (al) as shown in FIG.
Move the U firmware area 30 to a lower address area as indicated by 40 in FIG. By setting and clearing the main storage area 43, the initialization process ends.

In this way, the second control mode allows the main! r! J2 device initialization is possible.

〔Effect of the invention〕

As is clear from the above description, according to the present invention, the main storage device can be initialized in one of a plurality of different initialization modes.
In a computer system where one must be selected and used, multiple initialization processes can be configured economically and efficiently processed, resulting in a significant industrial effect of improving the economy and availability of the computer system. There is.

[Brief explanation of drawings]

Fig. 1 is a block diagram of the configuration of an embodiment of the present invention, Fig. 2 is an explanatory diagram of interface information, Fig. 3 is a block diagram of an example configuration of a computer system, and Fig. 4 is an explanatory diagram of initialization of the main storage device. . In the figure, 1 is the CPU, 2 is the storage control device, 3 is the main storage device, 4 is the svp, 5 is the console, 6 is the floppy disk storage device, 7.9.22 is the storage area, 8.10.37.43 is the main storage area, 20 is the control information load section, 21 is the mode specification section, 23 is the interface information, 30 and 40 are the CPU firmware area, 31 is the microprogram area, 32 and 41 are the hardware control area, and 33 is the program state 34 is a completion code section, 35 is a command code section, and 36 is a parameter section.

Claims (1)

[Claims] When initializing the main storage device (3) of a computer system having a central processing unit (1), a main storage device (3), and a service processing device (4), the main storage device (3) ) means (20) for loading control information including an initialization program to be executed by the central processing unit (1) into a predetermined storage area (22) of the central processing unit (22); It has a means (21) for loading specification information (23) for initialization processing from the device (4), and executes specified initialization processing by the initialization program according to the specification information (23). Characteristic main memory initialization control method.