cpu_init(9)

🦋 cpu_init(9) — Kernel API Manual 🌈

okay so welcome to the Kernel API Manual, bestie 💅 this is the page for cpu_init(9), and it's giving “tiny function, big boot-energy” energy. Let's get into it 🫶

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💖 NAME 💖

cpu_init — (the original NAME line is blank, no cap — we are not inventing a description) 🎀

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✨ SYNOPSIS ✨

void cpu_init (void );

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🎯 ARGUMENTS 🎯

• void — no arguments. that's it, that's the whole argument list 🫶

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🔥 DESCRIPTION 🔥

okay so this is literally our initial entry point for each CPU 💅 it gets invoked on the boot CPU before start_kernel is called. For SMP, a combo of this and start_secondary brings each processor up to a ready state before hand forking the idle loop — yes, “hand forking” is the phrase, we keep it 🫶

We do all the basic processor init right here, including setting up the caches, FPU, DSP, etc. ✨ By the time start_kernel is hit (and subsequently platform_setup), things like determining the CPU subtype and the initial configuration will all be done. iconic behavior, honestly 👑

Each processor family is still responsible for doing its own probing and cache configuration in cpu_probe — that part is not this function's job, bestie, don't try to make it one 💀

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🌸 SEE ALSO 🌸

• Kernel file ./arch/sh/kernel/cpu/init.c 👀

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source/version: ./arch/sh/kernel/cpu · date: October 2026 · page: cpu_init(9) — mwah, bye bestie 🎀✨