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authorStefan Reinauer <reinauer@chromium.org>2012-10-20 12:33:16 +0000
committerSimon Glass <sjg@chromium.org>2012-11-30 13:44:05 -0800
commit339c5111065c2b1893af1e4d6e9431b9496879a4 (patch)
treec4a665a8a22a2bcd3e8a5c951a70a822f6a5ac1b
parenta78d49473c81b8c95adfe684e62e5af6aa4f902d (diff)
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x86: 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@chromium.org> Signed-off-by: Simon Glass <sjg@chromium.org>
-rw-r--r--arch/x86/include/asm/io.h2
1 files changed, 1 insertions, 1 deletions
diff --git a/arch/x86/include/asm/io.h b/arch/x86/include/asm/io.h
index 2214958..84a638d 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