diff options
| author | Stefan Reinauer <reinauer@chromium.org> | 2011-09-19 09:42:33 -0700 |
|---|---|---|
| committer | Stefan Reinauer <reinauer@google.com> | 2011-09-19 13:46:31 -0700 |
| commit | 8ce00eac45983b0e5a3668ec88b9aa5e5b824413 (patch) | |
| tree | 2997882c122c4192b48328016292459a02296891 /arch/x86/include | |
| parent | e77f3d97fd98815d60391af31d928ec192905d19 (diff) | |
Don't spam POST80 codes with slow IO functions
This patch prevents u-boot from "spamming" random progress codes on
a port 80 "post card".
The previous version of this patch just removed the delays in the "slow"
IO functions, as they do not need to be slow, however, this patch is
less intrusive.
It uses another unused port that is often used by BIOSes (and the Linux
Kernel) for small delay timing purposes.
Signed-off-by: Stefan Reinauer <reinauer@google.com>
BUG=none
TEST=boot coreboot+u-boot, see the right post codes come up.
Change-Id: I9d1cc6de4472f5bb1f7b5ec6959273bfbfaa760b
Reviewed-on: http://gerrit.chromium.org/gerrit/7778
Reviewed-by: Simon Glass <sjg@chromium.org>
Commit-Ready: Stefan Reinauer <reinauer@google.com>
Tested-by: Stefan Reinauer <reinauer@google.com>
Diffstat (limited to 'arch/x86/include')
| -rw-r--r-- | arch/x86/include/asm/io.h | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/arch/x86/include/asm/io.h b/arch/x86/include/asm/io.h index 31038d42394..8e93e2be948 100644 --- a/arch/x86/include/asm/io.h +++ b/arch/x86/include/asm/io.h @@ -137,7 +137,7 @@ out: #ifdef SLOW_IO_BY_JUMPING #define __SLOW_DOWN_IO "\njmp 1f\n1:\tjmp 1f\n1:" #else -#define __SLOW_DOWN_IO "\noutb %%al,$0x80" +#define __SLOW_DOWN_IO "\noutb %%al,$0xed" #endif #ifdef REALLY_SLOW_IO |