JPH07120307B2 - Initial setting method - Google Patents

Description

DETAILED DESCRIPTION [Outline] A storage device that stores instructions and data, and a first address register (MAR) that holds an address of the storage device.
And a storage circuit for calculating the above instruction, and a second address register (LSAR) for holding the address of the storage circuit, which relates to an initial setting method of an arithmetic processing device, and a service processor (SVP) is provided. Even if it does not exist, a means for switching the output of the first address register (MAR) and the output of the second address register (LSAR) is provided for the purpose of enabling the initial setting of the arithmetic processing device, At the time of initial setting of the processing device, the switching means causes the first address register (MAR).
The output from is supplied to the memory circuit, and when the memory device is initialized, the memory circuit is also initialized at the same time.

[Industrial application field]

The present invention relates to a storage device that stores instructions and data,
It is composed of a first address register (MAR) for holding the address of the memory device, a memory circuit for calculating the above instruction, and a second address register (LSAR) for holding the address of the memory circuit. The present invention relates to an initial setting method for an arithmetic processing unit.

Conventionally, a large-scale computer system is often provided with a service processor (SVP) for the purpose of managing the maintenance and operation of the computer system, but when the service processor (SVP) goes down, Has a problem that all services related to maintenance and operation cannot be received, not to mention initialization of the computer system itself. In order to improve the reliability of the computer system, the service processor (SVP) is duplicated. Such measures are required.

In view of such circumstances, in a recent computer system, it is possible to construct a system that does not hinder the maintenance and operation of the system even if the service processor (SVP) is connected or not connected. It is designed to be used.

Therefore, it is required that the arithmetic processing unit of the computer system can be initialized only by the arithmetic processing unit without depending on the service processor (SVP).

[Problems to be Solved by Conventional Techniques and Inventions]

 FIG. 2 is a diagram for explaining a conventional initial setting method.

As described above, in a normal arithmetic processing unit, the initial setting when the power is turned on is performed by the service processor (SVP). However, it is necessary to make the initial setting.

As shown in the figure, for example, the initial setting only by the conventional arithmetic processing device is performed by setting arbitrary initial setting data (for example, all the Memory data register (first address register) (MAR) 2 after setting the data such as 0 ', if parity can be set, is not particularly limited)
Is provided for. Using the adder circuit ( ₊ n) 3,
Initial settings are made for all areas of the storage device (memory) 1. (This operation is referred to as sequence 1.) When the initialization of the memory device (memory) 1 is completed, the memory circuit address register (second register) is used to initialize the memory circuit (internal register) 6 for calculating an instruction. The address register) (LSAR) 7 is also provided with an adder circuit ( ₊ n) 8 and the input of the arithmetic circuit (ALU) 5 is controlled so that all “0” s are input, Initialize the circuit (internal register) 6. (This operation is called sequence 2) As described above, the initial setting only with the conventional arithmetic processing device is
For each object to be initialized, hardware for initialization is required for each, and as described above, the initialization operation is sequence 1 → sequence 2,
Since the process proceeds sequentially, there is a problem that the initialization process takes time.

In view of the above-mentioned conventional drawbacks, the present invention provides a storage device for storing instructions and data, a first address register (MAR) for holding an address of the storage device, and a storage circuit for calculating the instruction. In an arithmetic processing unit composed of a second address register (LSAR) that holds the address of the memory circuit, initializing each of the memory device and the memory circuit without providing dedicated hardware for each. It is intended to provide an initial setting method capable of

[Means for Solving the Problems]

The above problem is solved by the initialization method configured as follows.

A storage device for storing instructions and data, and a first address register (MAR) for holding an address of the storage device
And a storage circuit for calculating the above instruction, and a second address register (LSAR) for holding the address of the storage circuit, wherein the storage device and the arithmetic processing unit for initializing the storage circuit, A means for switching between the output of the first address register (MAR) and the output of the second address register (LSAR) is provided, and when the arithmetic processing unit is initialized, the switching means causes the first address to be switched. The output from the register (MAR) is switched to be supplied to the memory circuit, and the memory circuit is also initialized at the same time when the memory device is initialized.

[Action]

That is, according to the present invention, a storage device for storing instructions and data, a first address register (MAR) for holding an address of the storage device, a storage circuit for calculating the instruction, In an arithmetic processing unit configured with a second address register (LSAR) holding an address of a memory circuit, a first address register (MAR) holding an address of the memory device is a memory circuit for arithmetic ( Paying attention to the fact that the number of bits is larger than that of the second address register (LSAR) that holds the address of the internal register), a part of the output of the first address register (MAR) is used to calculate the above instruction. When the memory circuit (internal register) is supplied and the memory device is initialized, the memory circuit (internal register) is also initialized at the same time. Data (LSAR) adding circuit for initialization is not required for the effect of reducing the amount of hardware.

〔Example〕

 Embodiments of the present invention will be described in detail below with reference to the drawings.

FIG. 1 is a diagram showing an embodiment of the present invention, in which a part of the output of the first address register (MAR) 2 is supplied as an address for initializing the memory circuit (internal register) 6. Means 9 are the means necessary to carry out the present invention. The same reference numerals indicate the same objects throughout the drawings.

The initial setting method in the arithmetic processing unit of the present invention will be described below with reference to FIG.

First, specific data (for example, all "0") is set in the memory data register 4 for the storage device (memory) 1 in the same manner as in the conventional method, and the storage device (memory)
The first address register (MA that holds the address of 1
While adding R) 2 by the adder ( ₊ n) 3, the entire area of the storage device (memory) 1 is initialized.

At this time, in the present invention, attention is paid to the fact that the number of memory circuits (internal registers) 6 for calculating instructions is, for example, 16/32 / ..., which is smaller than the number of words in the memory device (memory) 1. Then, an arbitrary number of bits of the first address register (MAR) 2 are taken out and supplied to the memory circuit (internal register) 6 via a multiplexer (MPX) 9.

With such a configuration, the above-mentioned storage device (memory)
When the initial setting is performed for 1, the addresses are supplied to all the registers of the storage circuit (internal register) 6, and the arbitrary data supplied from the arithmetic circuit (ALU) 5 is It is also set in the memory circuit (internal register) 6 for calculating the instruction, and the initial setting for the memory circuit (internal register) 6 can be simultaneously executed.

As described above, the present invention provides the first address register (MA
When all addresses of the storage device (memory) are initialized while adding R), a part of the output of the first address register (MAR) is used instead of the instruction of the second address register (LSAR). By inputting as an address of a storage circuit (internal register) for calculating, the second address register (LSAR) can be stored in the storage circuit (internal register) without an adder circuit for initialization. The feature is that the initialization is performed.

〔The invention's effect〕

As described above in detail, according to the initialization method of the present invention, the memory device for storing the instruction and the data, and the first address register (MA) for holding the address of the memory device.
R), a memory circuit for calculating the above instruction, and a second address register (LSA) for holding the address of the memory circuit.
R) for initializing the arithmetic processing unit, a means for switching between the output of the first address register (MAR) and the output of the second address register (LSAR) is provided. At the time of initial setting of the arithmetic processing unit, the switching means causes the first address register (MA
The output from R) is switched so as to be supplied to the storage circuit, and when the storage device is initialized, the storage circuit is also initialized at the same time. Therefore, the second address register (LSAR) There is no need for an adder circuit for initial setting for, which has the effect of reducing the amount of hardware.

[Brief description of drawings]

FIG. 1 is a diagram showing an embodiment of the present invention, and FIG. 2 is a diagram explaining a conventional initial setting method. In the drawings, 1 is a storage device (memory), 2 is a memory address register,
Alternatively, the first address register (MAR), 3, 8 is an adder ( ₊
n), 4 is a memory data register, 5 is an arithmetic circuit (ALU), 6 is a memory circuit (internal register), 7 is a memory circuit address register or a second address register (LSAR), and 9 is a multiplexer (MPX). , Are shown respectively.

Claims (1)

[Claims] 1. A storage device (1) for storing instructions and data, and a first device for holding an address of the storage device (1).
Address register (MAR) (2), a memory circuit (6) for calculating the above instruction, and a second address register (LSAR) (7) for holding the address of the memory circuit (6). In the arithmetic processing unit for initializing the memory device (1) and the memory circuit (6), the output of the first address register (MAR) (2),
A means (9) for switching between the output of the second address register (LSAR) (7) is provided, and at the time of initial setting of the arithmetic processing device, the switching means (9) is used to MAR)
The output from (2) is switched so as to be supplied () to the storage circuit (6), and when the storage device (1) is initialized, the storage circuit (6) is simultaneously initialized. The default setting method.