2 # For a description of the syntax of this configuration file,
3 # see Documentation/kbuild/kconfig-language.txt.
6 menu "Firmware Drivers"
9 tristate "BIOS Enhanced Disk Drive calls determine boot disk (EXPERIMENTAL)"
10 depends on EXPERIMENTAL
13 Say Y or M here if you want to enable BIOS Enhanced Disk Drive
14 Services real mode BIOS calls to determine which disk
15 BIOS tries boot from. This information is then exported via sysfs.
17 This option is experimental, but believed to be safe,
18 and most disk controller BIOS vendors do not yet implement this feature.
21 tristate "EFI Variable Support via sysfs"
25 If you say Y here, you are able to get EFI (Extensible Firmware
26 Interface) variable information via sysfs. You may read,
27 write, create, and destroy EFI variables through this interface.
29 Note that using this driver in concert with efibootmgr requires
30 at least test release version 0.5.0-test3 or later, which is
31 available from Matt Domsch's website located at:
32 http://linux.dell.com/efibootmgr/testing/efibootmgr-0.5.0-test3.tar.gz
34 Subsequent efibootmgr releases may be found at:
35 http://linux.dell.com/efibootmgr
38 bool "Console device selection via EFI PCDP or HCDP table"
39 depends on ACPI && EFI && IA64
42 If your firmware supplies the PCDP table, and you want to
43 automatically use the primary console device it describes
44 as the Linux console, say Y here.
46 If your firmware supplies the HCDP table, and you want to
47 use the first serial port it describes as the Linux console,
48 say Y here. If your EFI ConOut path contains only a UART
49 device, it will become the console automatically. Otherwise,
50 you must specify the "console=ttyS0" kernel boot argument.
52 You must also enable the appropriate drivers (serial, VGA, etc.)
54 See <http://www.dig64.org/specifications/DIG64_HCDPv20_042804.pdf>