Method and device for judging hardware platform based on Linux kernel

Abstract

The invention discloses a method and device for judging a hardware platform based on Linux kernel. Corresponding hardware platforms are judged according to detected CPU (central processing unit) type in CPU detection phase of the early stage of Linux kernel initiation, and the problem that kernel programming requires to distinguish different hardware platforms to making different operations. The method comprises: S1, acquiring CPU type in the CPU detection phase of the early stage of Linux kernel initiation; S2, adding a hardware platform type judging code into the Linux kernel, assigning values to a global variable indicative of main platform type and a global variable indicative of sub-platform type, with the global variables pre-claimed in kernel source code; S3, determining hardware platform type according to the global variables during subsequent startup or running of the Linux kernel.

Description

technical field [0001] The invention relates to the field of kernel technology, in particular to a method and device for judging a hardware platform based on the Linux kernel. Background technique [0002] Network devices (firewalls, switches, servers, etc.) are divided into high-end and low-end products. There may be many types of hardware platforms from the same company, and different hardware platforms may come from different hardware suppliers, and the product codes used are only one set. Compile product image files that can run on different hardware platforms, that is to say, different hardware platforms need to be distinguished in the product code to realize automatic detection and loading of different platforms. [0003] There are many ways to judge the hardware platform, which can be distinguished by reading bus information or specific hardware characteristics. Generally, the platform is distinguished in user mode, but some programming for the Linux kernel needs to j...

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Problems solved by technology

[0003] There are many ways to judge the hardware platform, which can be distinguished by reading bus information or specific hardware features. Generally, the platform is distinguished and judged in user mode, but some programming for the Linux kernel needs to judge the hardware platform type when the kernel is just started. To do different operations, such as setting grub parameters, generally modify the / boot / grub / grub.conf file, but this file is set for all platforms, some special platforms may need to add or delete some special parameters, that is It needs to be set separately in the kernel, and the parameter analysis of grub is generally carried out through the early_param() function, which will be called by parse_early_param() when the kernel calls setup_arch(), and setup_arch() is in the kernel initialization function start_kernel() The calling position of is very high, and it is more difficult to judge the hardware platform at this time

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