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authorAaron Durbin <adurbin@chromium.org>2013-05-06 12:22:23 -0500
committerRonald G. Minnich <rminnich@gmail.com>2013-05-14 05:24:18 +0200
commit38c326d041218e65d156ce3dd3bfee39e73ceffa (patch)
treec48354cbb88efd809a37bb1d397ee76108ab68ec /src/cpu/x86/tsc
parent4409a5eef6d1d669caad1bfe3fbefee87ea7734e (diff)
downloadcoreboot-38c326d041218e65d156ce3dd3bfee39e73ceffa.tar.xz
x86: add thread support
Thread support is added for the x86 architecture. Both the local apic and the tsc udelay() functions have a call to thread_yield_microseconds() so as to provide an opportunity to run pending threads. Change-Id: Ie39b9eb565eb189676c06645bdf2a8720fe0636a Signed-off-by: Aaron Durbin <adurbin@chromium.org> Reviewed-on: http://review.coreboot.org/3207 Tested-by: build bot (Jenkins) Reviewed-by: Ronald G. Minnich <rminnich@gmail.com>
Diffstat (limited to 'src/cpu/x86/tsc')
-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 0e2a9c0faf..b8f250394f 100644
--- a/src/cpu/x86/tsc/delay_tsc.c
+++ b/src/cpu/x86/tsc/delay_tsc.c
@@ -4,6 +4,7 @@
#include <cpu/x86/tsc.h>
#include <smp/spinlock.h>
#include <delay.h>
+#include <thread.h>
#if !defined(__PRE_RAM__)
@@ -176,6 +177,9 @@ void udelay(unsigned us)
unsigned long long current;
unsigned long long clocks;
+ if (!thread_yield_microseconds(us))
+ return;
+
start = rdtscll();
clocks = us;
clocks *= get_clocks_per_usec();