JPS62221034A - Arithmetic controller - Google Patents

Abstract

PURPOSE:To select a desired microprogram by a rewriting means by rewriting the address information stored in a rewritable memory by the rewriting means, then executing an initial program. CONSTITUTION:When a power supply is turned on, an initial microprogram in an initial program memory part 230 is loaded to a control memory part 230. Then said microprogram starts its processing to load a boot program in a fixed memory 240 and the address data in an E<2>PROM 210 into a main memory 100. Then the boot program uses the address data to read a microprogram out of an address in a main bulk memory 400 corresponding to said address data and stores it in the pat 220. Then an arithmetic controller works under the control of the microprogram stored in the part 220.

Description

DETAILED DESCRIPTION OF THE INVENTION [Object of the Invention] (Field of Industrial Application) The present invention relates to an improvement of a microprogram control type arithmetic control device.

(Prior art) In a conventional arithmetic and control device of this type, the device is
Control was performed by one specific type of microprogram. However, there is a term called dynamic microprogram, which allows microprograms to be dynamically replaced in order to effectively utilize a small-capacity control storage section.

However, even with this dynamic microprogram, if the microprogram related to replacement is considered as one as a whole, control is still performed by one specific type of microprogram. That is, the software used one set of instructions 1 to 1 implemented by the microprogram. Therefore,
For example, even if multiple operating systems are executed at different times on one arithmetic and control unit, each operating system will use one instruction set 1-, and the optimal instruction set for the operating system will be used. It wasn't done.

(Problem to be solved by the invention) As described above, in conventional arithmetic and control devices, control is performed using one specific type of microprogram, and therefore control cannot be performed using an optimal microprogram that takes into account operating conditions, etc. There was a drawback. The present invention has been made to eliminate such drawbacks of conventional arithmetic and control devices, and its purpose is to select one suitable microprogram from a plurality of types of microprograms and use it in the arithmetic and control device. By providing an executable arithmetic and control device.

[Structure of the Invention] (Means for Solving the Problems) The present invention includes a bulk memory storing a plurality of types of microprograms, a control storage unit storing a microprogram for controlling an arithmetic control unit, and a bulk memory storing a plurality of types of microprograms. a rewritable memory in which address information in the bulk memory of the microprogram to be stored in the control storage section is stored; a rewriting means for rewriting the contents of the rewritable memory in response to instructions from an external device; The arithmetic control device is constructed by comprising a reading/loading means for reading a microprogram from the bulk memory based on the address information stored in the memory and loading the microprogram into the control storage section.

(Function) According to the above configuration, when the address information in the rewritable memory is rewritten by the rewriting means and the initial program is executed, the microprogram corresponding to the rewritten address information is loaded from the bulk memory to the control storage section. , executed.

Therefore, a desired microprogram can be selected by the rewriting means.

(Example) Hereinafter, an example of the present invention will be described in detail with reference to the drawings. FIG. 1 is a block diagram of one embodiment of the present invention. In the figure, 100 indicates a main storage device. This main storage device 100 stores programs and data to be executed by this arithmetic and control unit. Further, 400 indicates a main bulk memory.

This main bulk memory 400 stores, for example, microprograms 08 for each of multiple types of operating systems.
M1. ..., 03M1 and other micro program images MP1. ..., MPj are stored. 200
indicates an arithmetic control section. The arithmetic control unit 200 is hardware that performs arithmetic control based on a microprogram. The calculation control section 200 includes a control storage section 220. This control storage unit 220 stores a microprogram for controlling the arithmetic and control unit. Further, the arithmetic control unit 200 includes an initial program storage unit 230, and this initial program storage unit 230 stores an initial microprogram to be executed at the time of initialization (when the power is turned on or when commanded by a console device described later). is stored, and this initial microprogram is loaded into the control storage unit 220 at the time of initialization. This initial microprogram is composed of a microprogram for loading the microprogram in the main bulk memory 400 into the control storage section 220 and a microprogram for initial diagnosis. Further, within the arithmetic control unit 200, an E2PROM 210, which is a nonvolatile rewritable memory, and a fixed memory 240 are provided. Fixed memory 240 includes
A microprogram (hereinafter referred to as a boot program) for loading a microprogram from the main bulk memory 400 to the control storage unit 220 is stored. Here, the art program consists of a very limited set of instructions executed by the initial microprogram in the initial program storage section 230. Also, E
The 2FROM 210 stores address data (eg, device number, file name, etc. in which the corresponding microprogram is stored) of a microprogram whose boot program is to be successively retrieved from the main bulk memory 400. In addition, the E-PROM 210 includes a console device 3.
00 is connected. This console device 300 allows the address data stored in the E2PROM 210 to be rewritten. In addition, the console device 3
00 is connected to bus 500 and allows input of various data inputs to perform maintenance functions. Furthermore, bus 500
In addition to the console device 300 mentioned above, there is also a main note g:! , device 100. Main bulk memory 400, 22280M2
10, fixed memory 240 is connected.

The operation of the arithmetic and control device configured as above will be explained. When the power is turned on, the initial microprogram in the initial program storage section 230 is loaded into the control storage section 220, and processing by this initial microprogram is started. This initial microprogram causes the boot program in the fixed memory 240 and the E2PROM 21
The address data within 0 is loaded into the main storage device 100. As a result, the boot program loaded into the main storage device 100 uses the address data to
Main bulk memory 40 corresponding to this address data
The microprogram stored at the address within 0 is read out and loaded into the control memory section 220. Thereafter, the arithmetic and control unit operates under the control of the microprogram stored in the control storage unit 220.

A case will be described in which microprograms of different operating systems are executed at different times by the same hardware in the above arithmetic and control device. The operator is an operating system microprogram OS
In order to select a desired microprogram from among M1 to M1, the address data (device number, file name, etc.) of the microprogram in the main bulk memory 400 is sent to the E-PRO by the console device 300.
It dents into M210. Then, a command to start initialization is input using the console device 300. As a result, the arithmetic and control unit performs the same operation as when the power is turned on as described above, and the microprogram in the main bulk memory 400 specified by the address data in the E2FROM 210 is loaded into the control storage unit 220. Therefore, when executing a microprogram of a different operating system, it is only necessary to rewrite the address data in the E2FROM 210.In this way, a microprogram of an operating system with a different optimal instruction set can be executed on the same hardware. It is possible.

In addition, if a failure occurs in the arithmetic and control unit, the main bulk memory 4, which stores the diagnostic microprogram,
Corresponding to address 00, address data is written from console device 300 to 22280M210, and diagnostic control is performed when a command to start initialization is given. Multiple types of diagnostic microprograms, main bulk memory 4
By storing it in 00 and executing it as appropriate, more detailed diagnosis becomes possible.

FIG. 2 is a block diagram of another embodiment. In this figure, the same components as in FIG. 1 are given the same numbers. 250 in the figure indicates a selector. Selector 25
0 is the initial program storage unit 230 immediately after initialization.
The output of the initial program storage section 230 is selected until all the initial microprograms in the initial microprograms are successively outputted, and the control storage section 2208 is selected at other times. The microinstruction selected by selector 250 is provided to register 260. The arithmetic control unit is controlled by executing the microinstructions in the register 260. The configuration other than the above is the same as in the case of FIG.

In the arithmetic and control device configured as described above, when the power is turned on and initialization starts, the selector 250 selects the initial program storage section 230 side. The microinstructions of the initial microprogram in the initial program storage section 230 are set in the register 260. By executing this, the boot program in the fixed memory 240 and the address data in the E2PROM 210 are loaded into the main storage device 100. Based on the loaded boot program and address data, the corresponding microprogram is loaded from the main bulk memory 400 into the control storage section 220, and the output is sent to the selector 25.
It will be output to register 260 via 0. Hereinafter, operations similar to those described in FIG. 1 are performed,
A similar effect is produced.

FIG. 3 is a block diagram of yet another embodiment. In this figure, the same components as in FIGS. 1 and 2 are given the same numbers. In this embodiment, fixed memory 2
40 and the initial program storage section 230 are connected. Therefore, the initial program storage section 230 and the boot program are configured to be set in the register 260 via the selector 250. The other configurations are the same as in FIG. 2.

In the arithmetic control device having such a configuration, when the power is turned on and initialization is performed, the selector 250 passes the microinstructions of the initial microprogram stored in the initial program storage section 230. The microinstructions passed in this manner are set in register 260. By executing this, the microinstructions of the boot program in fixed memory 240 are then set in register 260. By executing the microinstructions of this boot program, the address data in the E2PROM 210 is read out to the main storage device 100, and the microprogram corresponding to the address data is loaded from the main bulk memory 400 and stored in the control storage unit 220. do. Thereafter, operations similar to those described with reference to FIG. 1 are performed, and similar effects are produced.

In each of the above embodiments, the operating system and diagnostic microprograms have been explained, but even when realizing a high-level language machine such as a LISP machine, the hardware can be easily implemented by simply preparing a corresponding microprogram. A system with low overhead can be realized without changing the system.

[Effects of the Invention] As described above, according to the present invention, it is possible to select and execute a microprogram having an optimal instruction set while using the same hardware, thereby reducing overhead.

[Brief explanation of drawings]

FIG. 1 is a block diagram of one embodiment of the present invention, FIG.
The figures are block diagrams of other embodiments of the invention. 100... Main storage device 200... Arithmetic control unit 2
10... E2PROM 220... Control storage section 230... Initial program storage section 240... Fixed memory 250... Selector 2
60...Register 300...Console device 400...Main bulk memory 500...Bus agent Patent attorney Book 1) Takashi Figure 1

Claims (1)

[Claims] a bulk memory storing a plurality of types of microprograms; a control storage section storing microprograms for controlling an arithmetic and control unit; and address information in the bulk memory of the microprograms to be stored in the control storage section. a rewritable memory, a rewriting means for rewriting the contents of the rewritable memory with external support, a microprogram read from the bulk memory based on the address information stored in the rewritable memory; 1. An arithmetic control device comprising: reading and loading means for loading into a control storage section.