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ec8f24b7 | 1 | # SPDX-License-Identifier: GPL-2.0-only |
1da177e4 LT |
2 | # |
3 | # Plug and Play BIOS configuration | |
4 | # | |
5 | config PNPBIOS | |
35de87de | 6 | bool "Plug and Play BIOS support" |
0619f394 | 7 | depends on ISA && X86_32 |
1da177e4 | 8 | default n |
a7f7f624 | 9 | help |
1da177e4 LT |
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 | ||
26 | config PNPBIOS_PROC_FS | |
27 | bool "Plug and Play BIOS /proc interface" | |
28 | depends on PNPBIOS && PROC_FS | |
a7f7f624 | 29 | help |
1da177e4 LT |
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 |