KR101103818B1 - Apparatus for controlling memory management unit, multi-core processor and computer system including the same, and method of controlling memory management unit - Google Patents

Abstract

The memory management unit control device includes a plurality of reference tables, an arbitration unit and a management unit. The plurality of reference tables correspond to each of the translation reference buffers respectively provided in the plurality of memory management units, and the arbitration unit receives the plurality of virtual page numbers from the plurality of memory management units and selects a plurality of virtual page numbers. Providing a control signal indicative of the page number and the memory management unit that has transmitted the selected virtual page number, wherein the management unit receives the selected virtual page number and the control signal to retrieve a plurality of reference tables based on the control signal, and selects the selected virtual page number Provides the physical page number corresponding to the arbitration unit. The arbitration section provides the physical page number received from the management section to the memory management unit indicated by the control signal. The memory management unit control device can improve the memory access speed.

Description

A memory management unit control device, a multi-core processor, a computer system and a memory management unit control method including the same.

The present invention relates to a memory management unit (MMU), and more particularly, to a memory management unit control device capable of sharing a translation lookaside buffer (TLB) between a plurality of memory management units; A multi-core processor, a computer system, and a memory management unit control method including the same.

In general, a central processing unit (CPU) reads a program using a virtual address, while main memory stores a program using a physical address. Therefore, it is necessary to translate the virtual address into a physical address, and a memory management unit (MMU) plays this role.

The main memory has a page table for storing all virtual addresses and their associated physical addresses. Thus, the page table can be used for translation from virtual address to physical address. However, since the page table exists in main memory, it takes a long time to convert a virtual address into a physical address through the page table.

Therefore, the memory management unit includes a translation lookaside buffer (TLB) in which part of the page table is registered. The translation reference buffer is cache memory used to quickly translate virtual addresses into physical addresses.

In general, the memory management unit divides the address space into units of pages, and among the virtual addresses received from the CPU, the lower N bits are regarded as offsets in a page, and the remaining bits are used to represent a page number. The translation reference buffer stores such page number information, and specifically, stores a virtual page number and physical page number pairs associated with it.

When the memory management unit receives the virtual address from the CPU, the memory management unit searches whether the translation reference buffer has information about the virtual page number, and if there is information about the virtual page number, obtains the physical page number from the translation reference buffer to complete the physical address. However, if there is no information on the virtual page number in the translation reference buffer, the page table with slow access speed is searched to obtain a physical page number.

In general, even in a multi-core system in which each core has a memory management unit, the memory management units included in each core may not have information about a virtual page number in each translation reference buffer. The memory access time is increased because the physical page number is obtained by searching the table.

One object of the present invention for solving the above problems is to provide a memory management unit control apparatus capable of sharing a translation reference buffer between a plurality of memory management units in a multi-core system.

Another object of the present invention is to provide a memory management unit control method capable of sharing a translation reference buffer among a plurality of memory management units in a multi-core system.

Another object of the present invention is to provide a multi-core processor with improved memory access speed.

Another object of the present invention is to provide a computer system with improved memory access speed.

In order to achieve the above object of the present invention, the memory management unit control apparatus according to an embodiment of the present invention includes a plurality of reference tables, an arbitration unit and a management unit. The plurality of reference tables correspond to each of the translation reference buffers provided in each of the plurality of memory management units. The arbitration unit receives a plurality of virtual page numbers from the plurality of memory management units and provides a control signal indicating a memory management unit transmitting the selected virtual page number among the plurality of virtual page numbers and the selected virtual page number. . The management unit receives the selected virtual page number and the control signal to search the plurality of reference tables based on the control signal, and provides a physical page number corresponding to the selected virtual page number to the arbitration unit. The arbitration section provides the physical page number received from the management section to a memory management unit indicated by the control signal.

In one embodiment, each of the plurality of reference tables may store virtual page number and physical page number pairs stored in a corresponding translation reference buffer.

The management unit may search whether the selected virtual page number exists for reference tables other than the reference table corresponding to the control signal among the plurality of reference tables.

The management unit obtains and provides the physical page number corresponding to the selected virtual page number from the plurality of reference tables when the selected virtual page number exists as a result of the search, and the selected virtual page number is If it does not exist, the physical page number corresponding to the selected virtual page number may be obtained and provided using a page table.

The manager may store the selected virtual page number and the physical page number pair in a reference table corresponding to the control signal.

In one embodiment, the arbitration unit is a control circuit for receiving the plurality of virtual page numbers to generate the control signal, a multiplexer for providing the selected virtual page number based on the control signal and based on the control signal It may include a demultiplexer for providing the physical page number.

In order to achieve the above object of the present invention, a memory management unit control method according to an embodiment of the present invention, receives a virtual page number from a plurality of memory management units, each provided in a plurality of memory management units Search whether the virtual page number exists in a plurality of reference tables corresponding to each of the converted reference buffers, each of which stores virtual page number and physical page number pairs stored in the corresponding converted reference buffer, When a page number exists in the plurality of reference tables, the physical page number corresponding to the virtual page number is obtained from the plurality of reference tables, and the virtual page number does not exist in the plurality of reference tables. If not, use the page table to water the corresponding virtual page number A logical page number is obtained, and the physical page number is provided to a memory management unit which has transmitted the virtual page number.

The virtual page number and the physical page number pair may be stored in a reference table corresponding to a translation reference buffer included in a memory management unit that has transmitted the virtual page number.

In order to achieve the above object of the present invention, a multi-core processor according to an embodiment of the present invention includes a plurality of cores and a memory management unit control device. The plurality of cores each include a memory management unit that provides the virtual page number selectively depending on whether a virtual page number exists in the translation reference buffer. The memory management unit control apparatus stores the virtual page number and physical page number pairs stored in the translation reference buffers provided in the plurality of memory management units, and the pairs when the virtual page number exists in the pairs. The physical page number corresponding to the virtual page number is obtained from the page table and is provided to the memory management unit and the virtual page number does not exist in the pairs. Acquire and provide to the memory management unit.

In an embodiment, the memory management unit control device corresponds to each of the translation reference buffers provided in the plurality of memory management units, and each of the virtual page number and physical page number pairs stored in the corresponding translation reference buffers. A plurality of reference tables for storing the plurality of virtual pages, a plurality of virtual page numbers received from the plurality of memory management units, and a virtual page number selected from the plurality of virtual page numbers and a memory management unit for transmitting the selected virtual page number. An arbitration unit for providing a control signal indicating the control unit; and receiving the selected virtual page number and the control signal to search the plurality of reference tables based on the control signal, and wherein the physical page number corresponds to the selected virtual page number. Management provided to the arbitration department And the arbitration unit may provide the physical page number received from the management unit to a memory management unit indicated by the control signal.

In order to achieve the above object of the present invention, a computer system according to an embodiment of the present invention includes a main memory and a multi-core processor. The main memory has a page table. The multi-core processor reads data from the main memory and writes data to the main memory. The multi-core processor includes a plurality of cores and a plurality of memory management units each having a memory management unit for selectively providing the virtual page number according to whether a virtual page number exists in the translation reference buffer. Storing the virtual page number and the physical page number pairs stored in the reference buffers, and when the virtual page number exists in the pairs, obtain the physical page number corresponding to the virtual page number from the pairs to manage the memory. And a memory management unit control device which obtains the physical page number corresponding to the virtual page number from a page table and provides the same to the memory management unit when the virtual page number does not exist in the pairs. .

In an embodiment, the memory management unit control device corresponds to each of the translation reference buffers provided in the plurality of memory management units, and each of the virtual page number and physical page number pairs stored in the corresponding translation reference buffers. A plurality of reference tables for storing the plurality of virtual pages, a plurality of virtual page numbers received from the plurality of memory management units, and a virtual page number selected from the plurality of virtual page numbers and a memory management unit for transmitting the selected virtual page number. An arbitration unit for providing a control signal indicating the control unit; and receiving the selected virtual page number and the control signal to search the plurality of reference tables based on the control signal, and wherein the physical page number corresponds to the selected virtual page number. Management provided to the arbitration department And the arbitration unit may provide the physical page number received from the management unit to a memory management unit indicated by the control signal.

In the apparatus and method for controlling a memory management unit according to the embodiments of the present invention as described above, in a multi-core system in which each core includes a memory management unit, information about a virtual page number required by the memory management unit is applicable. If it does not exist in the translation reference buffer but exists in the translation reference buffer of the memory management unit belonging to the other core, the physical page number is obtained from the information about the virtual page number present in the translation reference buffer of the memory management unit belonging to the other core. By enabling the conversion reference buffer to be shared among a plurality of memory management units, virtual page numbers can be converted into physical page numbers at a high speed without having to search a page table with a slow access speed.

The multi-core processor and the computer system according to the embodiments of the present invention as described above are provided with the memory management unit control device as described above, thereby improving the memory access speed.

1 is a block diagram illustrating a multi-core processor according to an embodiment of the present invention.
2 is a block diagram illustrating an apparatus for controlling a memory management unit according to an exemplary embodiment of the present invention.
FIG. 3 is a diagram illustrating a configuration of a reference table included in the memory management unit control device of FIG. 2.
4 is a block diagram illustrating an example of an arbitration unit included in the memory management unit control device of FIG. 2.
5 is a flowchart illustrating a method of controlling a memory management unit according to an embodiment of the present invention.
6 is a block diagram illustrating a computer system according to an example embodiment.

With respect to the embodiments of the present invention disclosed in the text, specific structural to functional descriptions are merely illustrated for the purpose of describing embodiments of the present invention, embodiments of the present invention may be implemented in various forms and It should not be construed as limited to the embodiments described in.

As the inventive concept allows for various changes and numerous modifications, particular embodiments will be illustrated in the drawings and described in detail in the text. However, this is not intended to limit the present invention to a specific disclosed form, it should be understood to include all modifications, equivalents, and substitutes included in the spirit and scope of the present invention.

Terms such as first and second may be used to describe various components, but the components should not be limited by the terms. The terms may be used for the purpose of distinguishing one component from another component. For example, without departing from the scope of the present invention, the first component may be referred to as a second component, and similarly, the second component may also be referred to as a first component.

When a component is said to be "connected" or "connected" to another component, it may be directly connected to or connected to that other component, but it may be understood that another component may exist in between. Should be. On the other hand, when a component is said to be "directly connected" or "directly connected" to another component, it should be understood that there is no other component in between. Other expressions describing the relationship between components, such as "between" and "immediately between," or "neighboring to," and "directly neighboring to" should be interpreted as well.

The terminology used herein is for the purpose of describing particular example embodiments only and is not intended to be limiting of the present invention. Singular expressions include plural expressions unless the context clearly indicates otherwise. In this application, the terms "comprise" or "having" are intended to indicate that there is a feature, number, step, action, component, part, or combination thereof that is described, and that one or more other features or numbers are present. It should be understood that it does not exclude in advance the possibility of the presence or addition of steps, actions, components, parts or combinations thereof.

Unless defined otherwise, all terms used herein, including technical or scientific terms, have the same meaning as commonly understood by one of ordinary skill in the art. Terms such as those defined in the commonly used dictionaries should be construed as meanings consistent with the meanings in the context of the related art and shall not be construed in ideal or excessively formal meanings unless expressly defined in this application. .

Hereinafter, with reference to the accompanying drawings, it will be described in detail a preferred embodiment of the present invention. The same reference numerals are used for the same constituent elements in the drawings and redundant explanations for the same constituent elements are omitted.

1 is a block diagram illustrating a multi-core processor according to an embodiment of the present invention.

Referring to FIG. 1, the multi-core processor 3000 includes a memory management unit control apparatus 1000 and n (n is an integer of 2 or more) cores CORE1-COREn 2000-1-2000-n. .

Each of the n cores 2000-1-2000-n includes a memory management unit MMU1-MMUn 2100-1-2100-n, and each of the memory management units 2000-1-2000-n. Includes translation reference buffers (TLB1-TLBn) 2110-1-2110-n.

The memory management unit 2000-i (i is an integer greater than or equal to 1 and less than or equal to n) converts a virtual page number (VPNi) corresponding to a virtual address into a physical page number (PPNi) corresponding to a physical address. VPNi) is searched for in the translation lookaside buffer 2110-i. If the virtual page number VPNi exists in the translation reference buffer 2110-i, the physical page number PPNi stored in association with the virtual page number VPNi in the translation reference buffer 2110-i. The virtual page number VPNi is converted into the physical page number PPNi by reading. If the virtual page number VPNi is not present in the translation reference buffer 2110-i, the memory management unit 2100-i provides the virtual page number VPNi to the memory management unit control device 1000. do.

The memory management unit control apparatus 1000 may store all virtual page numbers and physical pages stored in the translation reference buffers 2110-1-2110-n provided in the n memory management units 2100-1-2100-n, respectively. It stores number pairs.

The memory management unit control apparatus 1000 includes a plurality of virtual page numbers VPN1 from n memory management units 2100-1-2100-n respectively provided in the n cores 2000-1-2000-n. VPNn) to retrieve whether each of the virtual page numbers (VPN1-VPNn) are present in the stored virtual page number and physical page number pairs. If each of the virtual page numbers VPN1-VPNn exists in the stored virtual page number and physical page number pairs, the physical page number PPN1-corresponding to each of the virtual page numbers VPN1-VPNn from the pairs. PPNn) is obtained and provided to each memory management unit 2100-1-2100-n. On the other hand, if each of the virtual page numbers (VPN1-VPNn) does not exist in the stored virtual page number and physical page number pairs, the virtual page from the page table 4100 existing outside the multi-core processor 3000 The physical page numbers PPN1-PPNn corresponding to the numbers VPN1-VPNn are obtained and provided to the memory management units 2100-1-2100-n.

When the memory management unit 2100-i provides the virtual page number VPNi to the memory management unit control apparatus 1000 and receives a corresponding physical page number PPNi from the memory management unit control apparatus 1000, The management unit 2100-i updates the translation reference buffer 2110-i by storing the virtual page number VPNi and the physical page number PPNi pair in the translation reference buffer 2110-i.

At this time, the memory management unit control apparatus 1000 stores the virtual page number VPNi and the physical page number PPNi in addition to the stored virtual page number and physical page number pairs, thereby storing the stored virtual page number. The page number and physical page number pairs may be kept the same as the virtual page number and physical page number pairs stored in the translation reference buffers 2110-1 through 2110-n.

2 is a block diagram illustrating an apparatus for controlling a memory management unit according to an exemplary embodiment of the present invention.

The memory management unit control apparatus 1000 of FIG. 2 illustrates an example of the memory management unit control apparatus 1000 included in the multicore processor 3000 of FIG. 1, and is included in the multicore processor 3000 of FIG. 1. The memory management unit control apparatus 1000 may be configured as the memory management unit control apparatus 1000 of FIG. 2.

Referring to FIG. 2, the memory management unit control apparatus 1000 includes an arbitration unit 100, a management unit 200, and n reference tables 300-1 to 300-n.

The arbitration unit 100 receives the virtual page numbers VPN1-VPNn from the n memory management units 2100-1-2100-n that exist outside the memory management unit control apparatus 1000. The arbitration unit 100 receives the virtual page numbers VPN1-VPNn from the plurality of memory management units 2100-1-2100-n at the same time to sequentially provide the management page to the management unit 200. Control indicating a memory management unit 2100-i that has selected one virtual page number VPNi from among virtual page numbers VPN1-VPNn and has transmitted the selected virtual page number VPNi and the selected virtual page number VPNi. The signal CON is provided to the management unit 200. For example, when the arbitration unit 100 selects the virtual page number VPNi, the control signal CON may be a signal having an i value.

Each of the n reference tables 300-1-300-n corresponds to each of the translation reference buffers 2110-1-2110-n included in the n memory management units 2100-1-2100-n. do.

3 is a diagram illustrating a configuration of reference tables included in the memory management unit control apparatus 1000 of FIG. 2.

Each of the n reference tables 300-1 to 300-n included in the memory management unit control apparatus 1000 of FIG. 2 may be configured as the reference table 300 illustrated in FIG. 3.

Referring to FIG. 3, the reference table 300 includes columns corresponding to a virtual page number and a physical page number. The virtual page number and the corresponding physical page number are stored in the same row of the reference table 300.

Referring back to FIG. 2, each of the n reference tables 300-1-300-n stores virtual page number and physical page number pairs stored in the corresponding translation reference buffers 2110-1-2110-n. have. As will be described later, each of the n reference tables 300-1-300-n is identically updated when the corresponding translation reference buffers 2110-1-2110-n are updated, so that the corresponding translation reference buffers 2110 are updated. And virtual page number and physical page number pairs identical to those stored in the virtual page number and physical page number pairs.

The management unit 200 receives the selected virtual page number VPNi and the control signal CON to search whether the selected virtual page number VPNi is stored in the n reference tables 300-1 to 300-n. The physical page number PPNi corresponding to the selected virtual page number VPNi is provided to the arbitration unit 100.

The memory management unit 2100-i provides the virtual page number VPNi to the memory management unit control device 1000 when the virtual page number VPNi is not stored in the translation reference buffer 2110-i. Therefore, when the management unit 200 receives the selected virtual page number VPNi, the translation reference buffer 2110-i does not store the selected virtual page number VPNi, and thus the reference table 300-i is also selected. The number (VPNi) is not stored. Accordingly, the management unit 200 selects the virtual page number VPNi selected only for the remaining reference tables except for the reference table 300-i corresponding to the control signal CON among the n reference tables 300-1 to 300-n. You can search whether or not) is stored.

If the selected virtual page number VPNi exists in the n reference tables 300-1 to 300-n as a result of the search, the management unit 200 is selected from the reference table in which the selected virtual page number VPNi is stored. The physical page number PPNi stored in connection with the virtual page number VPNi is obtained and provided to the arbitration unit 100, and the selected virtual page number VPNi is n reference tables 300-1. 300-n), the physical page number PPNi corresponding to the selected virtual page number VPNi is obtained from the page table 4100 existing outside the memory management unit control apparatus 1000 and arbitrated. It may be provided to the unit 100.

The arbitration unit 100 receives the physical page number PPNi corresponding to the selected virtual page number VPNi from the management unit 200, and is a memory management unit indicated by the control signal CON, that is, the selected virtual page number VPNi. The physical page number (PPNi) is provided to the memory management unit 2100-i that has transmitted.

When the memory management unit 2100-i receives the physical page number PPNi corresponding to the virtual page number VPNi from the arbitration unit 100, the memory management unit 2100-i receives the virtual page number VPNi. And the translation reference buffer 2110-i by updating the physical page number (PPNi) pair in the translation reference buffer 2110-i.

Therefore, in order to keep the reference table 300-i corresponding to the translation reference buffer 2110-i the same as the translation reference buffer 2110-i, the management unit 200 stores the virtual page number VPNi and the physical page number. The (PPNi) pair may be stored in a reference table corresponding to the control signal CON, that is, the reference table 300-i.

4 is a block diagram illustrating an example of an arbitration unit 100 included in the memory management unit control apparatus 1000 of FIG. 2.

Referring to FIG. 4, the arbitration unit 100 includes a control circuit 110, a multiplexer (MUX) 120, and a demultiplexer (DEMUX) 130.

The control circuit 110 receives a plurality of virtual page numbers VPN1-VPNn from the plurality of memory management units 2100-1-2100-n. When a plurality of virtual page numbers VPN1-VPNn are simultaneously received from the plurality of memory management units 2100-1-2100-n, the control circuit 110 may sequentially provide the plurality of virtual page numbers VPN1-VPNn to the management unit 200. A control signal CON for selecting one virtual page number from among the plurality of virtual page numbers VPN1 to VPNn is generated. For example, when the virtual page number VPNi is to be selected, the control signal CON may be a signal having an i value. The control circuit 110 provides the control signal CON to the multiplexer 120, the demultiplexer 130, and the manager 200.

The multiplexer 120 receives a plurality of virtual page numbers VPN1-VPNn from the plurality of memory management units 2100-1-2100-n, and receives a control signal CON from the control circuit 110. Based on the control signal CON, one virtual page number is selected and provided from among the plurality of virtual page numbers VPN1 to VPNn. For example, when the control signal CON is a signal having an i value, the multiplexer 120 may select a virtual page number VPNi.

The demultiplexer 130 receives the physical page number PPNi corresponding to the virtual page number VPNi selected from the management unit 200, receives the control signal CON from the control circuit 110, and transmits the control signal CON to the control signal CON. The physical page number PPNi is provided to the memory management unit 2100-i which has transmitted the selected virtual page number VPNi based on this.

5 is a flowchart illustrating a method of controlling a memory management unit according to an embodiment of the present invention.

Referring to FIG. 5, the arbitration unit 100 receives a plurality of virtual page numbers VPN1-VPNn from a plurality of memory management units 2100-1-2100-n (step S100), and provides a plurality of virtual. Provides to the management unit 200 a control signal CON indicating the virtual page number VPNi selected from the page numbers VPN1-VPNn and the memory management unit 2100-i transmitting the selected virtual page number VPNi. .

The management unit 200 corresponds to each of the conversion reference buffers 2110-1-2110-n in which the selected virtual page number VPNi is included in the n memory management units 2100-1-2100-n, respectively. Search whether there exists a plurality of reference tables 300-1-300-n storing virtual page number and physical page number pairs stored in the corresponding translation reference buffers 2110-1-2110-n. (Step S200).

If the selected virtual page number VPNi exists in the n reference tables 300-1 to 300-n as a result of the search, the management unit 200 is selected from the reference table in which the selected virtual page number VPNi is stored. The physical page number PPNi stored in connection with the virtual page number VPNi is obtained (step S300), and the selected virtual page number VPNi is n reference tables 300-1 to 300-n. ), The physical page number PPNi corresponding to the selected virtual page number VPNi is obtained from the page table 4100 existing outside the memory management unit control apparatus 1000 (step S400). The management unit 200 provides the obtained physical page number PPNi to the arbitration unit 100.

The arbitration unit 100 is a memory management unit in which the control signal CON indicates a physical page number PPNi corresponding to the selected virtual page number VPNi received from the management unit 200, that is, the selected virtual page number VPNi. Is sent to the transmitted memory management unit 2100-i (step S500).

In order to update the reference table 300-i corresponding to the conversion reference buffer 2110-i in the same manner as the conversion reference buffer 2110-i, the management unit 200 may change the virtual page number VPNi and the physical page number ( The pair of PPNi may be stored in a reference table corresponding to the control signal CON, that is, the reference table 300-i (step S600).

In FIG. 5, step S600 is shown after step S500 is performed, but step S500 may be performed after step S600 is first performed, or step S500 and step S600 may be simultaneously performed. have.

6 is a block diagram illustrating a computer system according to an example embodiment.

Referring to FIG. 6, the computer system 5000 includes a multi-core processor 3000 and a main memory 4000.

The main memory 4000 includes a page table 4100 that stores virtual page numbers and physical page numbers in association with each other.

The multi-core processor 3000 reads data from the main memory 4000 and writes data to the main memory 4000. The multi-core processor 3000 includes a plurality of cores 2000-1-2000-n and a memory management unit control apparatus 1000.

The multi-core processor 3000 may be implemented using the multi-core processor 3000 of FIG. 1, and the configuration and operation of the multi-core processor 3000 of FIG. 1 have been described in detail with reference to FIG. 1. Is omitted.

In addition, the memory management unit control apparatus 1000 included in the multi-core processor 3000 may be implemented using the memory management unit control apparatus 1000 of FIG. 2, and the memory management unit control apparatus 1000 of FIG. 2. Since the configuration and operation of the above have been described in detail with reference to FIGS. 1 to 4, duplicate description thereof will be omitted.

In the memory management unit control apparatus according to the present invention, in a multi-core system in which each core includes a memory management unit, information about a virtual page number required by the memory management unit does not exist in the corresponding translation reference buffer, but other cores. If present in the translation reference buffer of the memory management unit belonging to the plurality of memory management units, the physical page number can be obtained through information about the virtual page number present in the translation reference buffer of the memory management unit belonging to another core. By allowing translation reference buffers to be shared between them, virtual page numbers can be quickly converted to physical page numbers without having to search for slow access page tables, which can be useful for improving memory access speed. .

While the above has been described with reference to a preferred embodiment of the present invention, those skilled in the art will be able to variously modify and change the present invention without departing from the spirit and scope of the invention as set forth in the claims below. I will understand.

100: arbitration unit 200: management unit
300-1 to 300-n: Reference table 1000: Memory management unit control unit
2000-1-2000-n: Core 2100-1-2100-n: Memory management unit
2110-1-2110-n: Translation reference buffer 3000: Multicore processor
4000: Main Memory 4100: Page Table
5000: computer system

Claims (12)

A plurality of reference tables corresponding to each of the translation reference buffers respectively provided in the plurality of memory management units;
An arbitration unit receiving a plurality of virtual page numbers from the plurality of memory management units and providing a control signal indicating a selected virtual page number among the plurality of virtual page numbers and a memory management unit which has transmitted the selected virtual page number; And
A management unit configured to receive the selected virtual page number and the control signal, search the plurality of reference tables based on the control signal, and provide a physical page number corresponding to the selected virtual page number to the arbitration unit,
And the arbitration unit provides the physical page number received from the management unit to a memory management unit indicated by the control signal. The apparatus of claim 1, wherein each of the plurality of reference tables stores virtual page number and physical page number pairs stored in a corresponding translation reference buffer. The memory management of claim 2, wherein the management unit searches whether the selected virtual page number exists for reference tables other than the reference table corresponding to the control signal among the plurality of reference tables. Unit control unit. The search method of claim 3, wherein the management unit obtains and provides the physical page number corresponding to the selected virtual page number from the plurality of reference tables when the selected virtual page number exists as a result of the search. As a result, when the selected virtual page number does not exist, the memory management unit control device according to claim 1, wherein the physical page number corresponding to the selected virtual page number is obtained and provided using a page table. The apparatus of claim 4, wherein the management unit stores the selected virtual page number and the physical page number pair in a reference table corresponding to the control signal. The method of claim 1, wherein the arbitration unit,
A control circuit for receiving the plurality of virtual page numbers to generate the control signal;
A multiplexer for providing the selected virtual page number based on the control signal; And
And a demultiplexer for providing the physical page number based on the control signal. Receiving a virtual page number from a plurality of memory management units;
The virtual page number corresponds to each of the translation reference buffers provided in each of the plurality of memory management units, and the virtual page number is stored in a plurality of reference tables that store virtual page number and physical page number pairs, respectively, stored in the corresponding translation reference buffer. Searching for presence;
When the virtual page number exists in the plurality of reference tables, the physical page number corresponding to the virtual page number is obtained from the plurality of reference tables, and the virtual page number is stored in the plurality of reference tables. If not present, using the page table to obtain a physical page number corresponding to the virtual page number; And
And providing the physical page number to a memory management unit that has transmitted the virtual page number. The method of claim 7, wherein
And storing the virtual page number and the physical page number pair in a reference table corresponding to a translation reference buffer included in the memory management unit that has transmitted the virtual page number. A plurality of cores each having a memory management unit for selectively providing said virtual page number depending on whether a virtual page number exists in a translation reference buffer; And
A memory management unit control device,
The memory management unit control device,
A plurality of reference tables corresponding to each of the conversion reference buffers respectively provided in the plurality of memory management units;
An arbitration unit which receives the virtual page number from each of the plurality of memory management units and provides a control signal indicating a selected virtual page number among the received virtual page numbers and a memory management unit which has transmitted the selected virtual page number; And
A management unit configured to receive the selected virtual page number and the control signal, search the plurality of reference tables based on the control signal, and provide a physical page number corresponding to the selected virtual page number to the arbitration unit,
And the arbitration unit provides the physical page number received from the management unit to a memory management unit indicated by the control signal. delete A main memory having a page table; And
A multi-core processor for reading data from the main memory and writing data to the main memory,
The multi-core processor,
A plurality of cores each having a memory management unit for selectively providing said virtual page number depending on whether a virtual page number exists in a translation reference buffer; And
Storing virtual page number and physical page number pairs stored in translation reference buffers provided in the plurality of memory management units, and when the virtual page number exists in the pairs, corresponding to the virtual page numbers from the pairs Acquires the physical page number to be provided to the memory management unit, and if the virtual page number does not exist in the pairs, obtains the physical page number corresponding to the virtual page number from a page table, the memory management unit A computer system comprising a memory management unit control device provided by. The apparatus of claim 11, wherein the memory management unit control device comprises:
A plurality of reference tables corresponding to each of the translation reference buffers provided in the plurality of memory management units, respectively, and storing virtual page number and physical page number pairs stored in corresponding translation reference buffers;
An arbitration unit receiving a plurality of virtual page numbers from the plurality of memory management units and providing a control signal indicating a selected virtual page number among the plurality of virtual page numbers and a memory management unit which has transmitted the selected virtual page number; And
Receiving the selected virtual page number and the control signal to search the plurality of reference tables based on the control signal and providing the physical page number corresponding to the selected virtual page number to the arbitration unit; ,
And the arbitration section provides the physical page number received from the management section to a memory management unit indicated by the control signal.

Images