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3bd323a1da
linux/arch/x86/boot
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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 x86: add a crc32 checksum to the kernel image. 2008-04-17 17:40:46 +02:00
.gitignore Update .gitignore files 2008-04-25 12:27:32 -07:00
a20.c x86 setup: a20: early timeout for a nonexistent keyboard controller 2009-02-02 14:52:00 -08:00
apm.c x86: remove pointless comments 2008-04-19 19:19:54 +02:00
bitops.h x86: remove pointless comments 2008-04-19 19:19:54 +02:00
boot.h x86: fix build warnings in real mode code 2008-08-18 09:20:14 +02:00
cmdline.c x86: remove pointless comments 2008-04-19 19:19:54 +02:00
code16gcc.h i386: move boot 2007-10-11 11:16:45 +02:00
copy.S x86: remove pointless comments 2008-04-19 19:19:54 +02:00
cpu.c x86 setup: handle more than 8 CPU flag words 2008-09-16 15:09:26 -07:00
cpucheck.c x86: boot: stub out unimplemented CPU feature words 2008-09-05 16:13:44 -07:00
edd.c Revert "x86: fix ghost EDD devices in /sys again" 2008-10-03 10:22:33 -07:00
header.S x86 setup: drop SWAP_DEV 2008-09-16 09:57:36 -07:00
install.sh x86: remove pointless comments 2008-04-19 19:19:54 +02:00
main.c x86: cleanup for setup code crashes during IST probe 2008-08-14 00:13:52 +02:00
Makefile x86 setup: remove IMAGE_OFFSET 2008-10-04 13:08:46 -07:00
mca.c x86: remove pointless comments 2008-04-19 19:19:54 +02:00
memory.c x86: fix build warnings in real mode code 2008-08-18 09:20:14 +02:00
mkcpustr.c x86 setup: handle more than 8 CPU flag words 2008-09-16 15:09:26 -07:00
mtools.conf.in i386: move boot 2007-10-11 11:16:45 +02:00
pm.c x86: unify and correct the GDT_ENTRY() macro 2008-07-17 11:29:24 -07:00
pmjump.S x86: fix regression: boot failure on AMD Elan TS-5500 2008-07-01 10:53:29 +02:00
printf.c x86: boot/printfc use NULL instead 0 2008-05-25 08:58:25 +02:00
setup.ld i386: move boot 2007-10-11 11:16:45 +02:00
string.c x86: remove pointless comments 2008-04-19 19:19:54 +02:00
tty.c x86: use limited register constraint for setnz 2008-11-25 15:38:03 +01:00
version.c x86: remove pointless comments 2008-04-19 19:19:54 +02:00
vesa.h x86-boot: don't request VBE2 information 2008-03-07 16:39:14 +01:00
video-bios.c x86: make variables static 2008-10-22 07:31:28 +02:00
video-mode.c x86: move suspend wakeup code to C 2008-04-17 17:41:37 +02:00
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 x86: remove pointless comments 2008-04-19 19:19:54 +02:00
voyager.c x86: remove pointless comments 2008-04-19 19:19:54 +02:00