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Randy Dunlap: Linux 2.4.x Initialization for IA-32

May 19, 2001, 15:00 (0 Talkback[s])
(Other stories by Randy Dunlap)

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[ Thanks to dep for this link. ]

If you've ever wondered what goes on at boot during the time between when your BIOS hands things off to lilo and just before your first init script takes over, this article will be of interest to you. If you've never wondered about any of that, but you'd still like a printable sheet to help you sing along with your kernel as it starts, this is still interesting.

"The description is in three main sections. The first section covers early kernel initialization on IA-32 (but only after your boot loader of choice and other intermediate loaders have run; i.e., this description does not cover loading the kernel). This section is based on the code in "linux/arch/i386/boot/setup.S" and "linux/arch/i386/boot/video.S".

The second major section covers Linux initialization that is x86- (or i386- or IA-32-) specific. This section is based on the source files "linux/arch/i386/kernel/head.S" and "linux/arch/i386/kernel/setup.c".

The third major section covers Linux initialization that is architecture-independent. This section is based on the flow in the source file "linux/init/main.c"."

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