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authorHamish Guthrie <hamish@prodigi.ch>2005-08-17 04:48:17 +0000
committerHamish Guthrie <hamish@prodigi.ch>2005-08-17 04:48:17 +0000
commite251c42197225d3783699343e0805c425aeae8e9 (patch)
tree3544e36115026aae4dfa74cd569497c5e322cd46 /src/cpu/x86
parent3d291aa6a2e5ae309a805c602a3768b6d86d8a2d (diff)
downloadcoreboot-e251c42197225d3783699343e0805c425aeae8e9.tar.xz
Changed udelay in delay_tsc to be more be more considerate of single
processor environments. git-svn-id: svn://svn.coreboot.org/coreboot/trunk@2009 2b7e53f0-3cfb-0310-b3e9-8179ed1497e1
Diffstat (limited to 'src/cpu/x86')
-rw-r--r--src/cpu/x86/tsc/delay_tsc.c4
1 files changed, 4 insertions, 0 deletions
diff --git a/src/cpu/x86/tsc/delay_tsc.c b/src/cpu/x86/tsc/delay_tsc.c
index c7c431baac..31c5bf80eb 100644
--- a/src/cpu/x86/tsc/delay_tsc.c
+++ b/src/cpu/x86/tsc/delay_tsc.c
@@ -159,7 +159,11 @@ void udelay(unsigned us)
count = rdtscll();
stop = clocks + count;
while(stop > count) {
+#ifdef CONFIG_SMP
+#if CONFIG_SMP == 1
cpu_relax();
+#endif
+#endif
count = rdtscll();
}
}