pcmcia_map_mem_page(9)

📦 version 7.3.1, in nixpkgs unstable

💅 pcmcia_map_mem_page(9) — from the Kernel API Manual, bestie 🎀

okay so like, this is a page straight out of the Kernel API Manual and it's about pcmcia_map_mem_page — literally the glow-up button for your iomem window. let's get into it ✨

✨ NAME ✨

pcmcia_map_mem_page — modify iomem window to point to a different offset 🦋

like, it's giving "same window, new view" energy. you're not making a new window, you're just sliding the vibe check to a different offset. periodt.

🌸 SYNOPSIS 🌸

int pcmcia_map_mem_page (struct pcmcia_device *p_dev , struct resource
*res , unsigned int offset );

yup, that's the whole signature, no cap. three args, one int return, and she's ready to slay 💅

💖 ARGUMENTS 💖

  • p_dev — the pcmcia device, aka the main character of this whole operation 👑
  • res — the iomem resource, and important: it's already enabled by pcmcia_request_window. like, don't come to this function with a window that hasn't been requested yet, that's not the vibe 🙈
  • offset — the card_offset to map. this is the actual "where are we pointing now" value, literally the whole point 🎯

🧚 DESCRIPTION 🧚

so here's the tea: pcmcia_map_mem_page modifies what can be read and written by accessing an iomem range that was previously enabled by pcmcia_request_window, by setting the card_offset value to offset.

that's it, that's the function. it doesn't create the window, it doesn't enable anything new — it takes your existing enabled iomem range and re-points it. the way that one lil call just shifts your whole read/write view 😭🔥

ngl this is lowkey iconic — you get a whole new slice of card memory without tearing down and rebuilding the window. highkey efficient behavior fr fr 🫶

🦋 SEE ALSO 🦋

the whole friend group lives in the kernel file ./drivers/pcmcia/pcmcia_resource.c — go say hi to all of them:

like, every single one of them, no skips, no cap — this is the full squad and they all ate 💀💖

🌈 tiny reminder bestie: make sure your res was already enabled by pcmcia_request_window before you call this, or you're gonna have a bad time okay bye ily 🫶

signing off from ./drivers/pcmcia — page dated October 2026, and yes it's still pcmcia_map_mem_page(9) 💜 stay slay, stay mapped ✨

📦 where this page comes from