STRUCT PRUSS_INT_MAP(9)

💜 struct pruss_int_map(9) — like, the PRU system events → channel → host mapping situation

okay so bestie, welcome to the Kernel API Manual and honestly? this one's a little struct with a big job. it lives in the kernel and it's literally the receipt that says which event went to which channel and which host got the interrupt. iykyk 🎀

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✨ NAME ✨

struct pruss_int_map — the PRU system events to channel and host mapping. no cap, that's the whole vibe of it.

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🌸 SYNOPSIS 🌸

struct pruss_int_map {
    u8 event;
    u8 chnl;
    u8 host;
 };

three little u8 fields, one giant slay. 🫶

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🦋 MEMBERS 🦋

• event — the number of the system event. that's the number, bestie, it's how we know which event we're talking about 💅
• chnl — the channel number assigned to that given event. so like, event goes in, channel comes out ✨
• host — the host number assigned to a given chnl. yes, the channel's host. the chain continues, we stay mapping 🌈

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👑 DESCRIPTION 👑

okay so here's the lore, and it's actually iconic: PRU system events get mapped to channels, and then those channels get mapped to host interrupts. it's a two-step pipeline and the struct above is holding the whole group chat together fr fr.

and the ratios? extremely flexible, which is lowkey the best part:

• events → channels: can be one-to-one or many-to-one (meaning multiple events per channel 🫶)
• channels → host interrupts: can be one-to-one or many-to-one (meaning multiple channels per interrupt 🔥)

so yeah, don't assume it's always a clean 1:1 match — multiple events can pile into a single channel, and multiple channels can pile into a single interrupt. it's giving "found family, everyone under one roof" energy and honestly? we love that for them.

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🧚 SEE ALSO 🧚

• Kernel file ./drivers/remoteproc/pru_rproc.h
• struct pru_irq_rsc(9)

go read those next, bestie, they're the sequel 💖

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and that's the whole page!! 🍓 this little writeup came out of ./drivers/remoteproc, dated October 2026, and it's filed under struct pruss_int_map(9). mwah, bye, go map some events 💅✨