linux/arch/x86/boot
H. Peter Anvin 3bd323a1da x86 setup: a20: early timeout for a nonexistent keyboard controller
When probing the keyboard controller to enable A20, if we get FF back
(which is *possible* as a valid status word, but is extremely
unlikely) then bail after much fewer iterations than we otherwise
would, and abort the attempt to access the KBC.

This hopefully should make it work a lot better for embedded platforms
which don't have a KBC and where the BIOS doesn't implement
INT 15h AX=2401h (and doesn't boot with A20 already enabled.)

If this works, it will be the one remaining use of CONFIG_X86_ELAN as
anything other than a processor type optimization option.

Signed-off-by: H. Peter Anvin <hpa@linux.intel.com>
2009-02-02 14:52:00 -08:00
..
compressed .gitignore updates 2008-10-30 11:38:45 -07:00
tools
.gitignore
a20.c x86 setup: a20: early timeout for a nonexistent keyboard controller 2009-02-02 14:52:00 -08:00
apm.c
bitops.h
boot.h
cmdline.c
code16gcc.h
copy.S
cpu.c
cpucheck.c
edd.c Revert "x86: fix ghost EDD devices in /sys again" 2008-10-03 10:22:33 -07:00
header.S
install.sh
main.c
Makefile x86 setup: remove IMAGE_OFFSET 2008-10-04 13:08:46 -07:00
mca.c
memory.c
mkcpustr.c
mtools.conf.in
pm.c
pmjump.S
printf.c
setup.ld
string.c
tty.c x86: use limited register constraint for setnz 2008-11-25 15:38:03 +01:00
version.c
vesa.h
video-bios.c x86: make variables static 2008-10-22 07:31:28 +02:00
video-mode.c
video-vesa.c x86 setup: fix asm constraints in vesa_store_edid 2009-01-27 14:48:46 -08:00
video-vga.c x86: boot - fix sparse warnings 2008-11-23 19:58:58 +01:00
video.c x86: boot - fix sparse warnings 2008-11-23 19:58:58 +01:00
video.h
voyager.c