diff options
| -rw-r--r-- | sys/src/9/pc/apic.c | 8 |
1 files changed, 7 insertions, 1 deletions
diff --git a/sys/src/9/pc/apic.c b/sys/src/9/pc/apic.c index eada39531..4e006e8fb 100644 --- a/sys/src/9/pc/apic.c +++ b/sys/src/9/pc/apic.c @@ -124,6 +124,12 @@ lapiconline(void) lapicw(LapicTICR, lapictimer.max); lapicw(LapicTIMER, LapicCLKIN|LapicPERIODIC|(VectorPIC+IrqTIMER)); + /* + * not strickly neccesary, but reported (osdev.org) to be + * required for some machines. + */ + lapicw(LapicTDCR, lapictdxtab[lapictimer.tdx]); + lapicw(LapicTPR, 0); } @@ -134,8 +140,8 @@ static void lapictimerinit(void) { Retry: - lapicw(LapicTDCR, lapictdxtab[lapictimer.tdx]); lapicw(LapicTIMER, ApicIMASK|LapicCLKIN|LapicONESHOT|(VectorPIC+IrqTIMER)); + lapicw(LapicTDCR, lapictdxtab[lapictimer.tdx]); if(lapictimer.hz == 0ULL){ uvlong x, v, hz; |