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| author | Aaron Durbin <adurbin@chromium.org> | 2013-05-06 12:22:23 -0500 |
|---|---|---|
| committer | Ronald G. Minnich <rminnich@gmail.com> | 2013-05-14 05:24:18 +0200 |
| commit | 38c326d041218e65d156ce3dd3bfee39e73ceffa (patch) | |
| tree | c48354cbb88efd809a37bb1d397ee76108ab68ec /src/cpu/x86/tsc | |
| parent | 4409a5eef6d1d669caad1bfe3fbefee87ea7734e (diff) | |
| download | coreboot-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.c | 4 |
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(); |