JPH0612330A - Storage control system - Google Patents

Abstract

PURPOSE:To improve the efficiency of space switching and the efficiency of address conversion by allowing a space-common TLB area and space specific TLB areas to be controlled by different systems and controlling the TLB area wherein space-common address conversion information can be stored when a space is switched. CONSTITUTION:A multiple virtual space 10 has a space-common area 12 and plural space specific areas. An information processor 1 has the space-common TLB area 2 and space specific TLB area 3, and pairs of virtual addresses 5 and corresponding physical addresses 6 are stored in respective entries 4 of the TLB areas. There are space-common address conversion information 7 and space specific address conversion information 8 as address conversion information and pieces of space-characteristics address conversion information 8 which are as many as present multiple virtual spaces are present, a variable CAS 9 referring to the address conversion information of a space specific area 11 which can currently be referred to is provided, and the space-common TLB area 2 and specific TLB area 3 are controlled by the different systems.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to individual management and address conversion for each shared area and space in multiple virtual spaces.

[0002]

2. Description of the Related Art In the conventional management method of multiple virtual spaces, the same address conversion mechanism is used for a region unique to the space and a region shared by the space.

[0003]

In the conventional technique, the address translation information unique to the space and the address translation information common to the space are managed in the same TLB area. Therefore, the information in the TLB area is invalidated when the space is switched. As a result, in an information processing device in which the space is frequently switched, the processing for obtaining the address conversion information becomes frequent, which causes a drop in performance.

In some information processing devices, an address is provided for each space so that the address translation information of the space before switching and the address translation information of the space after switching can be distinguished and the address translation information of a plurality of spaces can be held at the same time. Uses a conversion mechanism. However, even if the address translation information is common in a plurality of spaces, the identifiers are different, so that different address translation information must be set in the TLB area, which hinders efficient use of the TLB area. Also, when switching to a virtual space that is larger than the number of spaces that can be distinguished by the identifier,
There was a problem that the information in the TLB area had to be invalidated.

In view of the above problems, it is an object of the present invention to provide a storage management system capable of managing a space-specific TLB area and a space-specific TLB area by different methods and improving the efficiency of space switching and address conversion. I am trying.

[0006]

A logical space which is an address space for executing a program may be different from a physical space which is an address space in which a memory is mounted. A plurality of logical spaces are provided in an information processing device that has a mechanism for converting and stores a part of the address conversion information, which is the correspondence information between the addresses in the logical space and the addresses in the physical space, in the TLB area, which is an area that can be referred to at high speed. With respect to, the TLB area having the same address translation information and the TLB area having unique address translation information for each logical space are distinguished and managed.

[0007]

According to the above structure, the information processing apparatus has a mechanism for converting an address in the logical space into an address in the physical space in which the memory is mounted, and a part of the address conversion information is stored in the TLB area which can be referred to at high speed. In the information processing apparatus, the TLB area having the same address translation information for a plurality of logical spaces and the TLB area having the unique address translation information for each logical space can be managed by different methods by distinguishing them by the address information. The efficiency of space switching address conversion can be improved.

[0008]

An embodiment of the present invention will be described below with reference to the drawings.

FIG. 1 is a block diagram of a storage management system according to an embodiment of the present invention.

In FIG. 1, the entire multi-virtual space 10 has a space common area 12 and a plurality of space unique areas.
Only one of them is the spatially unique area 11 that can be currently referenced. The information processing apparatus 1 of the present embodiment has a space common TLB area 2 and a space unique TLB area 3, and each entry 4 of any TLB area stores a pair of a virtual address 5 and a corresponding physical address 6 therein. There is. There are two types of address translation information: address translation information 7 common to the space and address translation information 8 unique to the space. The space-specific address translation information 8 exists as many as the number of existing multiple virtual spaces. A variable CAS9 that refers to the address conversion information of the currently peculiar space specific area is provided.

Next, the operation will be described.

As a method for determining whether the virtual address is an address within a space-specific area or an address within a space common area, an address in a logical space is used in this embodiment. That is, the address in the logical space is 0x40000 in hexadecimal.
When it is 000 or more, the address is common to the space, and the virtual address is associated with the physical address by the address conversion information 7 common to the space. 0x4000000
When it is less than 0, the virtual address and the physical address are associated with each other by the space-specific address conversion information 8 referred to by the CAS 9. These pieces of address conversion information are in a tabular form that is referred to by using the virtual address as a key.

The information processing apparatus uses a virtual address (32bi
TL when converting t) to a physical address (32 bits)
The area B is referred to search for an entry having the corresponding virtual address. If the corresponding entry exists, the memory is referred to by the physical address described in the entry.

When the corresponding entry does not exist in the TLB area, if the address is within the area common to the space, the address translation information 7 common to the space is referred to, the physical address corresponding to the virtual address is obtained, and the pair is commonly used in the space. TLB area 2
Set to.

If the virtual address is an address within the space-specific area, the space-specific address conversion information 8 is referred to, the physical address corresponding to the virtual address is obtained, and the pair is set in the space-specific TLB area 3.

When switching the space, the information is invalidated only in the space-specific TLB area 3.

By thus limiting the TLB area used by the space-specific TLB area 3, the space-common TLB area 2
It is possible to switch the space while keeping the effective, and as a result, it is possible to improve the efficiency of the space switching and the efficiency of the spatial reference after the switching.

Although the TLB structure and the address section are limited in the embodiment, these are not the essence of the present invention. In the embodiment, the space-specific TLB area 3 and the space-common TL are also included.
Although the B region 2 is completely separated, the TLB regions are partially overlapped with each other, or the space-specific TL is
A configuration in which the B area is included in the space common TLB area is also possible.

[0019]

According to the present invention, the TLB area common to the space and the TLB area unique to the space are allowed to be managed by different methods. You can manage the area.
As a result, there is an effect that the efficiency of space switching and the efficiency of address conversion are improved.

[Brief description of drawings]

FIG. 1 is a configuration diagram of a storage management system according to an embodiment of the present invention.

[Explanation of symbols]

 1 Information Processing Device 2 Space Common TLB Area 3 Space Unique TLB Area 4 TLB Entry 5 Virtual Address 6 Physical Address 7 Spatial Common Address Translation Information 8 Space Unique Address Translation Information 9 CAS 10 Entire Virtual Virtual Space 11 Current Unique Space Unique Area 12 Space sharing area

Claims (1)

[Claims] 1. A mechanism for converting an address in a logical space of an information processing device into an address in a physical space, where a logical space as an address space for executing a program may be different from a physical space as an address space in which a memory is installed. In the information processing device, which has the same address for a plurality of logical spaces, stores a part of the address conversion information, which is the correspondence information between the addresses in the logical space and the addresses in the physical space, in the TLB area, which is an area that can be referred to at high speed. T with conversion information
A storage management method characterized by separately managing an LB area and a TLB area having unique address translation information for each logical space.