pdc_mem_map_hpa(9)

✨ NAME ✨

okay so bestie, welcome to pdc_mem_map_hpa(9) from the Kernel API Manual — this page is literally all about finding fixed module information. 🫶

pdc_mem_map_hpa — Find fixed module information. That's the whole vibe.

---

🦋 SYNOPSIS 🦋

int pdc_mem_map_hpa (struct pdc_memory_map *address , struct pdc_module_path *mod_path );

---

🎀 ARGUMENTS 🎀

• address — The return buffer. Like, this is where the info gets handed back to you. 💌
• mod_path — pointer to dev path structure. It's giving "pointer to a dev path structure," exactly as advertised. 🎯

---

🌸 DESCRIPTION 🌸

okay so the lore is: this call was developed for S700 workstations so the kernel can find the I/O devices — aka Core I/O. 🔥

In the future (Kittyhawk and beyond), this call will be replaced (on workstations) by the architected PDC_SYSTEM_MAP call. So yeah, it's got main-character energy for now, but its workstation era is eventually getting a sequel. 💅

This call is supported by all existing S700 workstations (up to Gecko). no cap. 👑

---

👑 SEE ALSO 👑

The Kernel file ./arch/parisc/kernel/firmware.c is in the mix, plus this whole squad of references — every single one, bestie:

• f_extend(9)
• convert_to_wide(9)
• set_firmware_width(9)
• pdc_emergency_unlock(9)
• pdc_add_valid(9)
• pdc_instr(9)
• pdc_chassis_info(9)
• pdc_pat_chassis_send_log(9)
• pdc_chassis_disp(9)
• __pdc_cpu_rendezvous(9)
• pdc_cpu_rendezvous_lock(9)
• pdc_cpu_rendezvous_unlock(9)
• pdc_pat_get_PDC_entrypoint(9)
• pdc_chassis_warn(9)
• pdc_coproc_cfg(9)
• pdc_iodc_read(9)
• pdc_system_map_find_mods(9)
• pdc_system_map_find_addrs(9)
• pdc_model_info(9)
• pdc_model_sysmodel(9)
• pdc_model_versions(9)
• pdc_model_cpuid(9)
• pdc_model_capabilities(9)
• pdc_model_platform_info(9)
• pdc_cache_info(9)
• pdc_spaceid_bits(9)
• pdc_btlb_info(9)
• pdc_lan_station_id(9)
• pdc_stable_read(9)
• pdc_stable_write(9)
• pdc_stable_get_size(9)
• pdc_stable_verify_contents(9)
• pdc_stable_initialize(9)
• pdc_get_initiator(9)
• pdc_pci_irt_size(9)
• pdc_pci_irt(9)
• pdc_pci_config_read(9)
• pdc_pci_config_write(9)
• pdc_tod_read(9)
• pdc_pim_toc11(9)
• pdc_pim_toc20(9)
• pdc_tod_set(9)
• pdc_iodc_print(9)
• pdc_iodc_getc(9)
• pdc_pat_cell_get_number(9)
• pdc_pat_cell_module(9)
• pdc_pat_cell_info(9)
• pdc_pat_cpu_get_number(9)
• pdc_pat_get_irt_size(9)
• pdc_pat_get_irt(9)
• pdc_pat_pd_get_addr_map(9)
• pdc_pat_pd_get_pdc_revisions(9)
• pdc_pat_pd_get_platform_counter(9)
• pdc_pat_io_pci_cfg_read(9)
• pdc_pat_io_pci_cfg_write(9)
• pdc_pat_mem_pdt_info(9)
• pdc_pat_mem_pdt_cell_info(9)
• pdc_pat_mem_read_cell_pdt(9)
• pdc_pat_mem_read_pd_pdt(9)
• pdc_pat_mem_get_dimm_phys_location(9)

---

mwah 💖 this page's source/version + date moment is ./arch/parisc/kernel, October 2026, pdc_mem_map_hpa(9) — k bye bestie, go map those HPAs! 💅✨