STRUCT PCC_CHAN_REG(9)

💅 struct pcc_chan_reg(9) — PCC register bundle 💅

okay so this is a page from the Kernel API Manual, bestie, and it's literally about struct pcc_chan_reg — the PCC register bundle. no cap, that's the whole vibe. let's get into it 🫶

✨ SYNOPSIS ✨

like, here's the whole struct, and yes you're gonna want to copy it exactly:

struct pcc_chan_reg {
    void __iomem *vaddr;
    struct acpi_generic_address *gas;
    u64 preserve_mask;
    u64 set_mask;
    u64 status_mask;
 };

🌸 Members 🌸

so every field in this little bundle of joy, one by one — you're gonna slay this:

• vaddr — the cached virtual address for this register. it's already been looked up and stashed here for you, so you don't gotta redo the work every time, periodt 🎀
• gas — a pointer to the generic address structure for this register. that's the ACPI "where does this thing actually live" situation, iykyk ✨
• preserve_mask — the bitmask to preserve when writing to this register. translation: the bits you're NOT touching, bestie, they stay exactly as they are 💅
• set_mask — the bitmask to set when writing to this register. these are the bits that go ✨on✨ 🦋
• status_mask — the bitmask to determine and/or update the status for this register. yes it does both jobs, main character energy only 💖

🔥 SEE ALSO 🔥

go read these next, fr fr — they're all in the Kernel file ./drivers/mailbox/pcc.c:

• struct pcc_chan_info(9)
• pcc_map_interrupt(9)
• pcc_mbox_irq(9)
• pcc_mbox_request_channel(9)
• pcc_mbox_free_channel(9)
• pcc_send_data(9)
• pcc_startup(9)
• pcc_shutdown(9)
• parse_pcc_subspace(9)
• pcc_parse_subspace_irq(9)
• pcc_parse_subspace_db_reg(9)
• pcc_parse_subspace_shmem(9)
• acpi_pcc_probe(9)
• pcc_mbox_probe(9)

ngl, that's a whole reading list — but you got this, and honestly the lore is worth it 😭👑

and that's the whole thing!! this gem dropped out of the ./drivers/mailbox directory, dated October 2026, and it's filed under struct pcc_chan_reg(9). mwah, go touch some registers 💋🍓🧚