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A system and method for facilitating memory access

A technology of memory access and memory, applied in the field of system memory

Active Publication Date: 2015-12-02
INT BUSINESS MASCH CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in some cases, this address does not have a one-to-one correspondence with a physical location in system memory

Method used

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  • A system and method for facilitating memory access
  • A system and method for facilitating memory access
  • A system and method for facilitating memory access

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Experimental program
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Embodiment Construction

[0035] According to one aspect of the present invention, a capability is provided to facilitate memory access by enabling determination at runtime (eg, address translation time) which translation format has been pre-registered for providing addresses that can be used to directly access system memory. In one example, an initial address is provided by a function of the adapter (here, referred to as an input / output (I / O) address), and a translation format registered for the function is used to provide an address that can be used to access system memory based on the initially provided address. address. As examples, the conversion format may indicate the type of conversion table to use, no conversion table is obtained, or the conversion may be bypassed.

[0036] refer to figure 1 One embodiment of a computing environment incorporating and using one or more aspects of the present invention is described. In one example, computing environment 100 is the System server. System Ba...

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Abstract

Various address translation formats are available for use in obtaining system memory addresses for use by requestors in accessing system memory. The particular address translation format to be used by a given requestor, an example of which is an adapter function, is pre-registered in a device table entry associated with that requestor.

Description

technical field [0001] The present invention relates generally to accessing system memory in a computing environment, and more particularly to facilitating providing addresses that can be used to access system memory. Background technique [0002] System memory is accessed through read and write requests. These requests can come from various components of the computing environment, including central processing units and adapters. Each request contains the address used to access system memory. However, in some cases, this address does not have a one-to-one correspondence with a physical location in system memory. Therefore, address translation is performed. [0003] Address translation is used to convert an address provided in a form that cannot be used directly when accessing system memory into another form that can be used directly when accessing a physical location in system memory. For example, virtual addresses contained in requests provided by the central processing...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06F12/10G06F13/28
CPCG06F13/28G06F12/1081G06F12/10
Inventor D·克拉多克T·格雷格D·格雷纳尔E·N·莱斯D·W·施密特
Owner INT BUSINESS MASCH CORP