set_satp_mode_from_fdt(9)

💅 set_satp_mode_from_fdt — like, the Kernel API Manual page, bestie 🎀

okay so picture this: it's a set_satp_mode_from_fdt(9) moment and you're holding a device tree blob wondering what SATP mode the MMU is serving. slay, this page has you. ✨

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✨ NAME ✨

set_satp_mode_from_fdt — literally figures out the SATP mode based on the MMU type chillin' in the fdt 💖

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🦋 SYNOPSIS 🦋

u64 set_satp_mode_from_fdt (uintptr_t dtb_pa );

that's the whole vibe. one arg, one u64 back. no cap. 🫶

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🌸 ARGUMENTS 🌸

• dtb_pa — the physical address of the device tree blob, aka where the fdt is living. give it the address and it's good to go 🍓

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👑 DESCRIPTION 👑

so what does it actually do? it returns the SATP mode that corresponds to the MMU type of the first enabled CPU ✨

and if there's, like, no enabled CPU to speak of? it returns 0 instead. periodt. 💅

ngl that's the entire function. short, sweet, main character energy. no surprises, no hidden lore. 🧚

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🔥 SEE ALSO 🔥

• the kernel file ./arch/riscv/kernel/pi/fdt_early.c — go read it, iykyk 👀
• fdt_device_is_available(9)
• isa_string_contains(9)
• early_cpu_isa_ext_available(9)
• fdt_early_match_extension_isa(9)

all of these are lowkey besties with this function, go say hi 💜

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and that's the page!! 🌈 it lives in ./arch/riscv/kernel/pi, dated October 2026, and yes the manual name is set_satp_mode_from_fdt(9) in case you forgot already 😭 mwah, go read a device tree bestie 💖🎀🦋