1# SPDX-License-Identifier: GPL-2.0-only 2# 3# Plug and Play BIOS configuration 4# 5config PNPBIOS 6 bool "Plug and Play BIOS support" 7 depends on ISA && X86_32 8 default n 9 ---help--- 10 Linux uses the PNPBIOS as defined in "Plug and Play BIOS 11 Specification Version 1.0A May 5, 1994" to autodetect built-in 12 mainboard resources (e.g. parallel port resources). 13 14 Some features (e.g. event notification, docking station information, 15 ISAPNP services) are not currently implemented. 16 17 If you would like the kernel to detect and allocate resources to 18 your mainboard devices (on some systems they are disabled by the 19 BIOS) say Y here. Also the PNPBIOS can help prevent resource 20 conflicts between mainboard devices and other bus devices. 21 22 Note: ACPI is expected to supersede PNPBIOS some day, currently it 23 co-exists nicely. If you have a non-ISA system that supports ACPI, 24 you probably don't need PNPBIOS support. 25 26config PNPBIOS_PROC_FS 27 bool "Plug and Play BIOS /proc interface" 28 depends on PNPBIOS && PROC_FS 29 ---help--- 30 If you say Y here and to "/proc file system support", you will be 31 able to directly access the PNPBIOS. This includes resource 32 allocation, ESCD, and other PNPBIOS services. Using this 33 interface is potentially dangerous because the PNPBIOS driver will 34 not be notified of any resource changes made by writing directly. 35 Also some buggy systems will fault when accessing certain features 36 in the PNPBIOS /proc interface (e.g. "boot" configs). 37 38 See the latest pcmcia-cs (stand-alone package) for a nice set of 39 PNPBIOS /proc interface tools (lspnp and setpnp). 40 41 Unless you are debugging or have other specific reasons, it is 42 recommended that you say N here. 43 44