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DDR memory configuration space access method and device

A technology of configuration space and access method, which is applied in the computer field, can solve the problems of difficult DDR memory debugging process and system board card debugging, and achieve the effect of shortening debugging time, reducing debugging difficulty and simple operation

Active Publication Date: 2020-09-22
LOONGSON TECH CORP
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  • Application Information

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Problems solved by technology

[0004] This application provides a DDR memory configuration space access method and device to solve the problems of difficult debugging of DDR memory and difficult debugging of system boards

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  • DDR memory configuration space access method and device
  • DDR memory configuration space access method and device
  • DDR memory configuration space access method and device

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Embodiment Construction

[0023] The DDR memory configuration space access method and device provided in the embodiments of the present application are mainly applicable to system boards integrated with a processor and DDR memory. The processor includes a memory controller, a DDR configuration register and a window configuration register. The window configuration register Including the first-level window configuration registers to the N-level window configuration registers with gradually decreasing priorities, by reconfiguring the M-th level window configuration registers, it is used to solve the problem that the DDR memory configuration space cannot be accessed. The debugging process is difficult, and the debugging of the system board is difficult.

[0024] In view of the fact that the window configuration register of the Loongson processor has a multi-level window design, this embodiment uses the DDR memory configuration space access method to explain the Loongson processor including N-level window co...

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Abstract

The invention provides a DDR (Double Data Rate) memory configuration space access method and device. The method is applied to a system board card integrating a processor and a DDR memory. The processor comprises a memory controller, a DDR configuration register and a first-level window configuration register to an N(th)-level window configuration register (N is greater than or equal to 2 and is aninteger) with gradually descending priorities. The method comprises the steps that a base address map of the DDR configuration register is acquired through an address mapping function; configurationis performed on the DDR configuration register to enable a configuration space access function of the DDR memory; according to occupation of the M(th)-level window configuration register (M is greaterthan or equal to 2 and smaller than or equal to N and is an integer), configuration is performed on the M(th)-level window configuration register; and the configuration space of the DDR memory is accessed through the configured M(th)-level window configuration register to acquire the state of the DDR memory. In this way, the debugging process of the DDR memory is simplified, the problem of the DDR memory is accurately positioned, and debugging time is shortened.

Description

technical field [0001] The present application relates to the field of computer technology, in particular to a method and device for accessing a DDR memory configuration space. Background technique [0002] With the vigorous promotion of processors, the application of processors as the computing core and control core of computers in various fields has increased significantly, and more and more system boards equipped with processors have begun to be application-oriented. Because the stability of the system board determines the normal operation of the computer on which the system board is installed, during the production process of the system board, it is necessary to perform stability debugging to ensure the stable operation of the computer. [0003] Currently, some processors, such as Loongson processors, integrate Double Data Rate (DDR) memory for data transmission, which improves the running speed of computers equipped with Loongson processors. However, in practical appli...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06F12/06
CPCG06F12/0653
Inventor 张宝祺
Owner LOONGSON TECH CORP