STRUCT UCODE(9)

✨ struct ucode(9) ✨

okay so this is a page from the Kernel API Manual, section 9, and it's literally all about struct ucode — the firmware header. bestie, it's giving "small struct, big responsibilities" 🎀

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🦋 NAME 🦋

struct ucode — the Firmware Header. that's it, that's the whole vibe 💅

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🌸 SYNOPSIS 🌸

here's the shape of it, copy-pasted exactly so you don't have to squint at anything:

struct ucode {
    u8 id;
    char version[VERSION_LEN - 1];
    __be32 code_size;
    u8 raz[12];
    u64 code[];
};

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💖 Members 💖

breaking it down field by field, no cap:

• id — the microcode ID, i.e. this firmware's little name tag 🏷️
• version — the firmware version, stored as a char array of VERSION_LEN - 1 (yes, that's the exact expression, don't come for me)
• code_size — the size of the code section, typed __be32 so you know it's big-endian, periodt
• raz — alignment. it's a u8 array of 12. yes the name is giving "reserved something" and we love an abbreviation 🙈
• code — the actual code section, a flexible u64 array code[] — the main character of the struct, honestly 👑

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🔥 SEE ALSO 🔥

go touch some source, bestie:

• Kernel file ./drivers/crypto/cavium/nitrox/nitrox_main.c
• nitrox_add_to_devlist(9)
• nitrox_remove_from_devlist(9)
• nitrox_bist_check(9)
• nitrox_probe(9)
• nitrox_remove(9)

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and that's the whole page!! 🫶 this little number lives in ./drivers/crypto/cavium/nitrox, and it's dated October 2026 — so yeah, mark your calendar, the struct said "see you then" 💜✨ see you in the group chat, mwah 🎀