JPS63186347A - Memory device - Google Patents

Abstract

PURPOSE:To omit the transfer of data between memories and to realize a high- speed access to the memory by using simultaneously a main memory area and an extended memory area and at the same time adding the memories to both memory areas to store data for each page. CONSTITUTION:The storing subjects such as the processing programs, the data to be processed, etc., are stored for each page into a main memory area and an extended memory area in a memory 1. The head address of each page and the page addresses of each memory area are held in each entry of both a main memory area page address conversion table 11 and an extend memory area page address conversion table 21 respectively. When an access is given to the memory 1, the entry numbers of the table 11 are set at an entry holding register 12 and at the same time the intra-page addresses are set at an intra-page address holding register 14. Then the main memory page addresses held in the entries of the table 11 are read out and held by a page address holding register 13. These page addresses and the addresses given from the register 14 are used for accesses given to the memory 1.

Description

[Detailed description of the invention] purpose of invention Industrial applications.

- The present invention relates to a storage device used in an electronic computer system.

2. Description of the Related Art In general, in electronic computer systems, the main storage device is composed of a high-speed semiconductor memory, whereas the secondary storage device is composed of a low-speed memory such as a magnetic disk. For this reason,
The time it takes to replace pages limits memory access speed and, by extension, data processing speed.

Therefore, in order to improve processing speed, a high-speed expansion storage device using semiconductor memory or the like is installed between the main storage device and the secondary storage device. A layered memory configuration is also used to reduce replacement time. Typically, in a supercomputer or the like, high-speed data transfer of about IG bytes/second is performed between an extended storage device and a main storage device.

Problems to be Solved by the Invention In the above-mentioned conventional storage devices, even if the data transfer between the expanded storage device and the main storage device is performed at a fairly high speed, the access speed is definitely reduced by the time taken for this transfer. be.

A storage device according to the present invention includes a storage device that stores data in units of pages in each storage area while having a main storage area and an extended storage area. By centrally managing data that was previously managed in a distributed manner between separate main storage and expanded storage on a single, increasingly large-capacity storage device, access is now possible without the need for data transfer between storage devices. The system is configured to speed up the process.

Furthermore, the storage device of the present invention swaps the page address conversion tables for each of the main storage area and extended storage area and the contents held in each of these conversion tables, thereby converting any page between the main storage area and the extended storage area. The present invention is equipped with means for replacing the tα device and the extended storage device, and enables high-speed page management based on an extremely simple hardware configuration, with almost no changes to the software in conventional devices in which the tα device and the extended storage device were physically separated. It is configured so that.

Hereinafter, further details of the present invention will be explained together with examples.

Embodiment FIG. 1 is a block diagram showing the configuration of a storage device according to an embodiment of the present invention.

In the figure, 1 is a storage device in which a main storage area and an extended storage area are mixed, 11 is a main storage area page address conversion table, 12 is an entry holding register, 13 is a page address holding register, and 14 is an intra-page address holding register. It is. Further, 21 is an extended storage area page address conversion table, 22 is an entry holding register, and 23 is a page address holding register.

Main rudder + mixed in storage device 1! ! In the area and the extended storage area, storage objects such as processing programs and data to be processed are stored in units of pages. Each entry in the main storage area page address conversion table 11 holds the start address of each page belonging to the main storage area (referred to as "main storage area page address"). Furthermore, each entry in the extended storage area page address conversion table 21 holds the page address of each page belonging to the extended storage area.

When accessing the storage device 1, a host device such as a central processing unit (not shown) stores the entry number in the main storage page address conversion table 11, which holds the start address of the page to be accessed, in the entry holding register 12. At the same time, the intra-page address is set in the intra-page address holding register 14. The main memory page address held there is read from the entry in the main memory page address conversion table 11 having the entry number set in the entry holding register 12, is held in the page address holding register 13, and is sent to the storage device as an upper address. 1. At the same time, the intra-page address held in the intra-page address holding register 14 is supplied to the storage device 1 as a lower address, and the storage device 1 is accessed by the upper device.

For example, as shown in the figure, each entry of the main storage area page address conversion table 11 contains the page address al of each page stored in the main storage area.

If the page addresses a2, . . . are stored, the page addresses al, a2, .

Further, as shown in the figure, each entry of the extended storage area page address conversion table 21 contains the page address a 2 +a4 . . . of each page stored in the extended storage S]iM.
. is stored, the page address a2 . a4 . . . are read to the page address holding register 23.

If the page to be accessed exists not in the main storage area but in the extended storage area, the page is swapped from the expanded storage area to the main storage area prior to accessing the page. However, in this storage device, the main storage area and extended storage area are physically coexisted within the same storage device, and page swapping does not involve data transfer.
Page swapping is achieved simply by exchanging the contents held in the conversion tables 11 and 21 in both storage areas.

For example, it belongs to the main storage area and the page address a1
It is assumed that the page having the page address a3 and the page belonging to the extended storage area and having the page address a3 are exchanged. First, each entry number related to page replacement is set in the entry holding registers 12 and 22, respectively. Along with this, the page address a3 of the page to be newly changed from the extended storage area to the main storage area side is read to the page address holding register 23, and in place of this, the page address a3 of the page to be changed from the main storage area side to the extended storage area side is read out. The page address a1 of the page to be saved is read to the page address holding register 13. Page address holding register 23
and page addresses a3 and a read to 13, respectively.
l is written to the entry in the main storage area page address translation table 11 and the entry in the extended storage area page address translation table 21 specified by the entry holding registers 12 and 22, respectively. As a result,
The updating of the contents of the conversion tables 11 and 21 due to the exchange of pages between the main storage area and the extended storage area is completed.

Effects of the Invention As explained in detail above, the storage device of the present invention has a configuration including a storage device that stores data in units of pages in each storage area while having a main storage area and an extended storage area. This eliminates the need for data transfer between devices and has the effect of realizing high-speed access.

Furthermore, the storage device of the present invention can transfer any page between the main storage area and the extended storage area by exchanging the page address conversion tables of the main storage area and the extended storage area and their retained contents. Since the configuration is equipped with a means for exchanging between the main storage device and the extended storage device, it is possible to create an extremely simple hardware configuration without changing the software of conventional devices in which the main storage device and the extended storage device are physically separated. Achieves high-speed page management.

[Brief explanation of the drawing]

FIG. 1 is a block diagram showing the configuration of a storage device according to an embodiment of the present invention. l...Storage device in which main storage area and extended storage area are mixed, 11...Main storage area page address conversion table, 21...Extended storage area page address conversion table, 12.22... Entry holding Register, 13.23
...Page address holding register.

Claims (1)

[Scope of Claims] A storage device that stores page-by-page data in each storage area while having a main storage area and an extended storage area mixed together; A main storage area page address conversion table that reads out the page address of the main storage area held in a designated entry and supplies it to the storage device; and an extended storage area page that holds the address of the page of the expanded storage area in each entry. an address conversion table; and means for exchanging any page between the main storage area and the extended storage area by exchanging the contents held in the main storage area page address conversion table and the extended storage area page address conversion table. A storage device characterized by: