ocxl_global_mmio_clear32(9)

💅 ocxl_global_mmio_clear32 💅

okay so bestie, welcome to the Kernel API Manual — yes that's the whole manual name, we're fancy here, and today's main character is ocxl_global_mmio_clear32. sit down, hydrate, let's go 🫶

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✨ NAME ✨

ocxl_global_mmio_clear32 — Set bits in a 32 bit global MMIO register

(no bc I know, i know, it says "clear" and it says "set" — that's literally what the page says and I am NOT the one who gets to argue with the kernel docs, so we're keeping it exactly as-is 💀 iykyk)

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🎀 SYNOPSIS 🎀

int ocxl_global_mmio_clear32 (struct ocxl_afu *afu , size_t offset ,
enum ocxl_endian endian , u32 mask );

that's the whole signature, character for character, no notes 👑

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🌸 ARGUMENTS 🌸

here's the lineup, and every single one of them matters:

• afu — The AFU. the whole entire AFU. she's the context this call lives inside 💖
• offset — The Offset from the start of MMIO. like how far from home we're wandering, measured from the very start ✨
• endian — the endianness that the MMIO data is in. the byte-order vibe check, if you will 🦋
• mask — a mask of the bits to set. literally the bit mask, that's it, that's the whole thing 🎯

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🔥 DESCRIPTION 🔥

Returns 0 for success, negative on error.

that's it. that's the description. short and iconic, she ate and left no crumbs 💅 lowkey the most drama-free manpage section i've ever read — no giant essay, just "works? 0. didn't work? negative." periodt.

ngl bestie, the full description really is just that one line — please don't go looking for more lore, there isn't any in the source page 😭

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👑 SEE ALSO 👑

so this one's got a whole friend group, and they're all required reading:

• Kernel file ./include/misc/ocxl.h
• ocxl_function_open(9)
• ocxl_function_afu_list(9)
• ocxl_function_fetch_afu(9)
• ocxl_afu_get(9)
• ocxl_afu_put(9)
• ocxl_function_config(9)
• ocxl_function_close(9)
• ocxl_context_alloc(9)
• ocxl_context_free(9)
• ocxl_context_attach(9)
• ocxl_context_detach(9)
• ocxl_afu_irq_alloc(9)
• ocxl_afu_irq_free(9)
• ocxl_afu_irq_get_addr(9)
• ocxl_irq_set_handler(9)
• ocxl_afu_config(9)
• ocxl_afu_set_private(9)
• ocxl_afu_get_private(9)
• ocxl_global_mmio_read32(9)
• ocxl_global_mmio_read64(9)
• ocxl_global_mmio_write32(9)
• ocxl_global_mmio_write64(9)
• ocxl_global_mmio_set32(9)
• ocxl_global_mmio_set64(9)
• ocxl_global_mmio_clear64(9)

like, the entire ocxl cinematic universe fr fr — read them all, bestie, they all reference each other 🌈

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and that's the page!! source lives at ./include/misc, version October 2026, and the title, as always, is ocxl_global_mmio_clear32(9). go forth and clear those (set those?) 32-bit global MMIO bits, you absolute icon 🧚💜⭐