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x86: add thread support

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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>
This commit is contained in:
Aaron Durbin
2013-05-06 12:22:23 -05:00
committed by Ronald G. Minnich
parent 4409a5eef6
commit 38c326d041
9 changed files with 140 additions and 1 deletions
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4
src/cpu/x86/lapic/apic_timer.c
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@ -21,6 +21,7 @@
#include <stdint.h>
#include <console/console.h>
#include <delay.h>
#include <thread.h>
#include <arch/io.h>
#include <arch/cpu.h>
#include <cpu/x86/car.h>
@ -95,6 +96,9 @@ void udelay(u32 usecs)
{
u32 start, value, ticks;
if (!thread_yield_microseconds(usecs))
return;
if (!timer_fsb || (lapic_read(LAPIC_LVTT) &
(LAPIC_LVT_TIMER_PERIODIC | LAPIC_LVT_MASKED)) !=
(LAPIC_LVT_TIMER_PERIODIC | LAPIC_LVT_MASKED))