Method for displaying SMP (Symmetric Multi-Processing) function of godson CPUs (Central Processing Units)

A CPU core, Loongson technology, applied in the field of Loongson motherboard function display

Inactive Publication Date: 2012-03-07
SUGON INFORMATION IND
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Therefore, it is not difficult to understand that there are differences in CPU initialization, SMP function implementation, etc.

Method used

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  • Method for displaying SMP (Symmetric Multi-Processing) function of godson CPUs (Central Processing Units)
  • Method for displaying SMP (Symmetric Multi-Processing) function of godson CPUs (Central Processing Units)

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Embodiment Construction

[0017] Each Loongson CPU contains four cores, which can be used as AP CPU or BSP CPU. Each core can be masked through the program, but in the case of single-channel, there must be a core as the BSP CPU; in the case of dual-channel, there must be a core on CPU No. 0 as the BSP CPU. Otherwise, each core is either shielded, or waits for the BSP CPU to wake up in a loop, and the BIOS program cannot continue to execute. By setting the BIOS and Linux kernel programs used by blades and motherboards, single CPU 1, 2, 3, 4 core functions, dual CPU 1, 2, 3, 4, 5, 6, 7, 8 core functions can be realized.

[0018] By detecting the CPU number and the core number of the CPU in the BIOS, the position and number of cores to be started in the CPU can be controlled. The EBase register contained in the No. 0 coprocessor inside each core is used to indicate the processor number in a multi-core system. The lowest two bits of the register, that is, bits 0 and 1 indicate the core number of the CPU,...

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Abstract

The invention provides a method for displaying the SMP (Symmetric Multi-Processing) function of godson CPUs (Central Processing Units). A core of each godson CPU is set as a main CPU core, and the rest of cores are used as CPU node cores; and the CPU cores are started and closed by adjusting a motherboard jumper cap or setting BIOS (Basic Input / Output System) and linux kernel parameters to display an SMP working process and configuration method. Through the method provided by the invention, the SMP working principle and configuration method can be extremely clearly understood.

Description

technical field [0001] The present invention relates to the function display of the Loongson motherboard, in particular to a method for displaying the SMP function of the Loongson CPU. Background technique [0002] The motherboards sold in the current market and in actual use are basically X86 architecture, and the BIOS programs used are all purchased binary programs, and the configuration of the multi-core CPU cannot be customized. [0003] The blades and mainboards developed based on the MIPS architecture Loongson CPU use BIOS programs and Linux kernel programs with complete source codes, and the blades and mainboards are dual-channel. In addition, the X86 architecture is very different from the MIPS architecture itself. Therefore, it is not difficult to understand that there are differences in CPU initialization and SMP function implementation. Contents of the invention [0004] In order to solve the configuration and display of SMP functions based on Loongson CPU bla...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F1/16
Inventor 邵宗有刘新春杨晓君郑臣明李永成尹宁宁李丰旺王晖柳胜杰王英郝志彬梁发清
Owner SUGON INFORMATION IND
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