Stefan Reinauer ([email protected]) just uploaded a new patch set to gerrit, which you can find at http://review.coreboot.org/1267
-gerrit commit d74f2d22cc0c7c9d72be2fdf329baf44dbbbdb21 Author: Stefan Reinauer <[email protected]> Date: Tue Jul 10 15:19:23 2012 -0700 Re-initialize Local APIC timer on APs In order to be able to use udelay in code running on AP cores the timer has to be initialized on the according local APICs or the system will just hang when udelay is used. Change-Id: I776bc96aa6d876ff2582d0c05cbc9c7611cb06b5 Signed-off-by: Stefan Reinauer <[email protected]> --- src/cpu/x86/lapic/apic_timer.c | 4 +++- 1 files changed, 3 insertions(+), 1 deletions(-) diff --git a/src/cpu/x86/lapic/apic_timer.c b/src/cpu/x86/lapic/apic_timer.c index a4106d4..1fd0c60 100644 --- a/src/cpu/x86/lapic/apic_timer.c +++ b/src/cpu/x86/lapic/apic_timer.c @@ -79,7 +79,9 @@ void udelay(u32 usecs) { u32 start, value, ticks; - if (!timer_fsb) + if (!timer_fsb || (lapic_read(LAPIC_LVTT) & + (LAPIC_LVT_TIMER_PERIODIC | LAPIC_LVT_MASKED)) != + (LAPIC_LVT_TIMER_PERIODIC | LAPIC_LVT_MASKED)) init_timer(); /* Calculate the number of ticks to run, our FSB runs at timer_fsb Mhz */ -- coreboot mailing list: [email protected] http://www.coreboot.org/mailman/listinfo/coreboot
