JPH07319717A - Program switching method for information processor - Google Patents

Abstract

PURPOSE:To provide a program switching method for information processor in order to improve the information processing efficiency by reducing the program switching processing and the inter-program data succession processing which are required when the processing of a relevant program is switched over to the processing of a new program. CONSTITUTION:A new program P3 is stored in a memory space 3 different from a memory space 2 where an old program P2 which has been processed or is being processed is stored, and the logical addresses B2 and B3 in the memory spaces of both programs P2 and P3 are replaced with each other, for example. The store address of the old data is separately stored in an area 1, and, at the same time, the difference between the logical addresses of both programs P2 and P3 is sent to the program P3, and an access is performed to the old data.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a program switching method of an information processing apparatus for adding / changing various processing functions provided in the information processing apparatus by switching programs.

[0002]

2. Description of the Related Art FIG. 4 is a diagram showing an example of a block configuration of a conventional information processing apparatus. The information processing apparatus shown in FIG. 4 controls a processing apparatus 10 for performing various kinds of processing and an input / output of the processing apparatus 10. It is composed of an I / O device 20. Further, the processing device 10 includes a CPU (central processing unit) 10a and a memory 10b, and the memory 10b stores a control program for the CPU 10a, other programs, and various data.

From the I / O device 20 to the processing device 10
When data is supplied to the CPU 10, the CPU 10a causes the memory 10
The program on b is started, and information processing is performed based on the input data. Then, the data generated from the input data is stored in the designated address in the memory 10b, the information is further read from the designated address in the memory 10b, and is output to the I / O device 20 as output data.

In such an information processing apparatus, when a program that has been performing processing (hereinafter, old program) is switched to a program for performing new processing (hereinafter, new program), system restart processing is performed. As a result, the new program is overwritten in the execution area of the memory 10b in which the old program is stored.

FIG. 5 is a block diagram of another conventional information processing apparatus having a duplex configuration. In FIG.
I / O device 20 and I / O having the same configuration as the processing device 10
O device 21 and processing device 11 are newly provided, and
The O devices 20 and 21 are connected to each other. In such an information processing apparatus, in order to add a function or modify a program by switching a program, one processing apparatus (operating system: for example, the processing apparatus 1 having a duplex configuration is used.
0) executes the information processing by the old program, stores the new program in the other processing device that is not in operation (spare system: processing device 11 in this case), and changes the processing system from the active processing system 10 to the standby processing system. A method of switching the processing to 11 is adopted.

Next, FIG. 6 is a block diagram of an information processing apparatus having a plurality of memories in the apparatus, showing another conventional example. The processing device 12 in this figure is a CP
Memory 12 for storing programs executed by U12a
c and 12d and their memory 12c or 12d
Memory 12b for storing all data of Also,
When switching programs, all the data in the memory (for example, the memory 12c) in which the old program is stored is transferred to the memory 12b, and the new program is placed in the other memory (memory 12d in this case). Switch processing to the program.

[0007]

However, in the method described in FIG. 4, when the program is switched, the operation is temporarily stopped, during which the new data is transferred and various data used for the processing of the old program are temporarily stopped. (Hereinafter, old data) must be taken over, and further I / O
If the various setting states of the device 20 or old data are lost due to some abnormality, the old data must be re-input when the next information processing is started.

Further, in FIG. 5, the processing system 1 of the operating system
In the method in which data is transferred from 0 to the processing device 11 of the standby system and the processing of the standby system is taken over by the standby system, the information transfer process between the active processing device 10 and the standby system processing device 11 becomes complicated. However, there is a drawback that the processing takes a long time.

Similarly, in the program switching method of the processor 12 of FIG. 6, when the old data is taken over, the old data is once transferred to the memory 12b, and the memories 12c and 12d in which the old and new programs are arranged are switched. , Memory 1
The old data transferred to 2b needs to be relocated to the memory in which the new program is stored, which requires a long time for data transfer.

The present invention has been made under such a background, and does not require a spare device such as the processing device 11,
An object of the present invention is to provide a program switching method for an information processing apparatus that shortens the operation interruption time of the processing apparatus 10 by taking over the status of the I / O apparatus 20 and old data to new processing at high speed.

[0011]

In order to solve the above-mentioned problems, the invention according to claim 1 is configured by a processor and a memory, and addresses of a plurality of programs mounted on the memory according to a program instruction. In a program switching method of an information processing device having a memory control function for switching a process from an old program installed in the memory to a new program newly installed, the old program on the memory is arranged. The first step of arranging the new program in a memory space different from the memory space, and the storage address information of the old data of the old program is stored in the memory space in which the new program is arranged or common to the old and new programs. The second step of storing in the memory space and the memory where the new program is placed. The logical address space of the re-space is changed to the logical address space of the memory space in which the old program is arranged, and the logical address space of the memory space in which the old program is arranged is changed to the logical address space of the new program. By managing the relative difference address information of each logical address of the old program and the new program after being changed in the third step and the third step relatively changing to a logical address space other than After starting the operation of the new program, the new program includes a fourth step of inheriting the old data of the old program according to the storage address information of the old data stored in the second step and the difference address information. Characterize.

According to a second aspect of the present invention, in the first aspect of the invention, the change of the relative address space of the old program and the new program is performed by the logic of an address conversion table showing the correspondence between the relative address and the physical address. It is characterized in that it is performed by changing the address.

[0013]

According to the present invention, the new program is stored in a memory space different from the memory space in which the old program is stored, and the logical addresses of the memory space of the new and old programs are exchanged, for example. Then, even in the new program, the difference between the storage address of the old data stored in the separate area and the logical address of the new and old programs (difference address)
The storage location of the old data can be determined and the access becomes possible.

Therefore, the processing for switching the old and new programs and the inheritance of the old data is reduced, and
Even when an address is included in the old data to be taken over, the address can be used as it is.

[0015]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is a diagram illustrating a configuration of an information processing apparatus to which the present invention is applied, and portions corresponding to those in FIG. 4 are denoted by the same reference numerals and the description thereof will be omitted. 10 in this figure
Reference numeral c is a memory control unit, which is used to store addresses (hereinafter, logical addresses) used in the program execution process and the memory 10
The correspondence of the actual address (hereinafter, physical address) in b is converted.

The memory control unit 10c is realized by, for example, an address conversion table arranged in the internal memory of the CPU 10a. In the table, for example, the physical address B corresponding to the logical addresses A1, A2 and A3 is stored.
1, B2, B3 are set.

Further, the memory 10b is divided into, for example, memory spaces 1, 2, and 3, and a switching control program P1, an old program P2, and a new program P3 for the old and new programs are stored respectively. The addresses of the memory spaces 1, 2 and 3 are the physical address B of the address conversion table.
It corresponds to 1, B2 and B3, respectively.

The logical address designated by the program at the time of processing can be freely set as long as it does not overlap. Further, the switching control program P1 of the old and new programs performs a process of switching a logical address and a process of transferring data between the old and new programs, in addition to the above-mentioned address conversion process.

FIG. 2 is a diagram exemplifying a processing sequence when the old and new programs are switched by using the memory control unit 10c. Further, FIG. 3 is an explanatory diagram of the above-mentioned data transfer processing, FIG. 3 (a) shows the setting of the address of the memory 10b before the transfer, and FIG. 3 (b) shows the setting of the address of the memory 10b after the transfer. In addition, in FIG.
In the conversion table of FIG. 1, "0", "4000" and "6000" are assigned to the logical addresses A1, A2 and A3, and "0", "1000" and "200" are assigned to the physical addresses B1, B2 and B3.
"0" is assigned as the head address of each area.

The operation will be described below with reference to FIGS. 2 and 3. First, when the new program P3 is input from the I / O device 20 while the old program P2 is stored in the memory space 2 (FIG. 3A), the new program P3 is updated by the processing of the old / new program switching control program P1. The program P3 is stored in the memory space 3 (FIG. 2, time t)
1).

Then, once the input from the I / O device 20 is restricted (time t2), the address "4050" where the old data of the old program P2 was stored is not affected by the program switching and the memory space 1 (FIG. 3). It is stored in a predetermined area of (b)) (time t3 in FIG. 2).

After that, the logical address "4000" of the memory space 2 and the logical address "6000" of the memory space 3 of the address conversion table are rewritten by the processing of the switching control program P1 of the old and new programs (FIG. 3).
(B)). That is, the start logical address of the area where the new program P3 is stored is set to "4000", and the start address of the area where the old program P2 is stored is set to "600".
0 "(FIG. 2, time t4).

Thereafter, the relative address difference "2000" of each memory space in which the old and new programs are stored is passed to the new program P3 (time t5 in FIG. 2), and the storage address of the old data after switching the memory space is , {Old address “4050” + address difference “2000”}, it can be seen that it is stored in the logical address “6050”.

When the handover process is completed, I /
The input restriction from the O device 20 is released (FIG. 2, time t).
6).

According to this embodiment, by passing the old data storage address "4050" stored in the memory space 1 to the new program P3 after switching the memory space, it becomes possible to take over the old data. Since the indirect process is unnecessary for the transfer process, the transfer of the old data to the new program P3 can be executed by one process.

Even when the data includes address information data (address data), the logical address space of the new program P3 is the same as the logical address space of the old program P2 when the old program P2 is executed. Therefore, it can be used as it is.

In this embodiment, the storage address of the old data is stored at a predetermined position in the memory space 1, but the new program P3 is stored at a predetermined position (the new program P3 and the new program P3). You may make it memorize | store in the position which does not overlap.

[0028]

As described above, according to the present invention,
The processing for switching between the old and new programs and the inheritance of the old data is reduced, and the address data included in the old data can be used as it is.
Therefore, the effect that the processing efficiency of the information processing device is improved can be obtained.

[Brief description of drawings]

FIG. 1 is a block configuration diagram of an information processing apparatus that implements the present invention.

FIG. 2 is a diagram illustrating a control procedure of the present embodiment.

FIG. 3 is a diagram illustrating a data takeover method according to the present embodiment.

FIG. 4 is a block diagram of a conventional information processing device (example 1).

FIG. 5 is a block diagram of a conventional information processing device (example 2).

FIG. 6 is a block configuration diagram of a conventional information processing device (example 3).

[Explanation of symbols]

 10, 11 Processing device 20, 21 I / O device 10a CPU 10b Memory 1, 2, 3 Memory space P1 Old / old program switching control program P2 Old program P3 New program 10c Memory control unit A1, A2, A3 Logical address B1, B2 , B3 physical address

Claims (2)

[Claims] 1. An information processing apparatus comprising a processor and a memory, and having a memory control function of switching addresses of a plurality of programs mounted on the memory according to a program instruction, from an old program mounted on the memory. In a program switching method of an information processing device for switching processing to a newly implemented new program, a first step of allocating the new program in a memory space different from the memory space in which the old program is allocated on the memory And a second step of storing the storage address information of the old data of the old program in the memory space in which the new program is arranged or in the memory space common to the old and new programs, and the logic of the memory space in which the new program is arranged. The address space is empty in the memory where the old program is located. A third step of changing the logical address space of the old program to a logical address space other than the changed logical address space of the new program. By managing relative difference address information of each logical address of the old program and the new program after being changed in the third step, after the operation of the new program is started, the new program is And a fourth step of inheriting the old data of the old program according to the storage address information of the old data stored in the step and the difference address information. 2. The change of each relative address space of the old program and the new program is performed by changing a logical address of an address conversion table showing a correspondence between a relative address and a physical address. A program switching method of the described information processing apparatus.