US 11,237,728 B2 · Method for accessing extended memory, device, and system

Abstract

In a method for accessing an extended memory, after receiving a first memory access request from a processor system in a computer, an extended memory controller sends a read request for obtaining to-be-accessed data to the extended memory and return, to the processor system, a first response message indicating the to-be-accessed data has not been obtained. The extended memory controller writes the to-be-accessed data into a data buffer after receiving the to-be-accessed data returned by the extended memory. After receiving, from the processor system, a second memory access request comprising a second access address, the extended memory controller returns, to the processor system, the to-be-accessed data in the data buffer in response to the second memory access request, wherein the second access address is different from the first access address and points to the physical address of the to-be-accessed data.

Claims20

Dependent claims

A method performed by an extended memory controller for accessing an extended memory of a computer, the method comprising:

receiving, from a processor system of the computer, a first memory access request for reading data stored in the extended memory, wherein the first memory access request comprises a first access address of the data;
sending, to the processor system, in response to the first memory access request, and before obtaining the data from the extended memory, a first response message indicating that the extended memory controller has not obtained the data;
receiving, from the processor system, after receiving the first memory access request, and after obtaining the data from the extended memory, a second memory access request comprising a second access address that is different from the first access address;
making a determination that the first access address and the second access address correspond to a same physical address of the data;
and
sending the data to the processor system in response to the second memory access request and the determination.

3 more elements

An extended memory system comprising:

an extended memory;
and
an extended memory controller coupled to the extended memory and configured to:
receive, from a processor system of a computer, a first memory access request for reading data stored in the extended memory, wherein the first memory access request comprises a first access address of the data;
send, to the processor system, in response to the first memory access request, and before obtaining the data from the extended memory, a first response message indicating that the extended memory controller has not obtained the data;
receive, from the processor system, after receiving the first memory access request, and after obtaining the data from the extended memory, a second memory access request comprising a second access address that is different from the first access address;
make a determination that the first access address and the second access address correspond to a same physical address of the data;
and
send the data to the processor system in response to the second memory access request and the determination.

6 more elements

A computer system comprising:

an extended memory system comprising:
an extended memory controller, and
an extended memory configured to store data;
and
a processor system coupled to the extended memory system and configured to:
generate, according to a storage address of the data, N+1 memory access requests, wherein each of the N+1 memory access requests comprises a different access address corresponding to a same physical address of the data in the extended memory;
and
send the N+1 memory access requests to the extended memory controller for accessing the data from the extended memory.

5 more elements

Dependencies are inferred from the claim text.

Method for accessing extended memory, device, and system

Life of this patent

Method for accessing extended memory, device, and system

Life of this patent

Abstract

Claims20