diff options
| author | cinap_lenrek <cinap_lenrek@gmx.de> | 2012-08-25 14:06:42 +0200 |
|---|---|---|
| committer | cinap_lenrek <cinap_lenrek@gmx.de> | 2012-08-25 14:06:42 +0200 |
| commit | 19219d5a9552171887f4d7e314b25bae2d3fc2f8 (patch) | |
| tree | 5afa23cc863cfffb528a3ec78c7a5acbe403344a /sys/src/9/pc/apic.c | |
| parent | 69f5a04ac39f63f0b16df41cc268b3227b5cac99 (diff) | |
archmp: checksum _MP_ structure before use, coherence() and comments (import from sources)
we used to only test the checksum of the PCMP structure referenced by
the _MP_ without checking _MP_ itself. now fixed.
geoff added some coherence() calls and comments in the mpstartup and
apic code which seems to be a good idea.
Diffstat (limited to 'sys/src/9/pc/apic.c')
| -rw-r--r-- | sys/src/9/pc/apic.c | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/sys/src/9/pc/apic.c b/sys/src/9/pc/apic.c index 0788e5adf..eada39531 100644 --- a/sys/src/9/pc/apic.c +++ b/sys/src/9/pc/apic.c @@ -242,6 +242,7 @@ lapicstartap(Apic* apic, int v) int i; ulong crhi; + /* make apic's processor do a warm reset */ crhi = apic->apicno<<24; lapicw(LapicICRHI, crhi); lapicw(LapicICRLO, LapicFIELD|ApicLEVEL|LapicASSERT|ApicINIT); @@ -249,8 +250,10 @@ lapicstartap(Apic* apic, int v) lapicw(LapicICRLO, LapicFIELD|ApicLEVEL|LapicDEASSERT|ApicINIT); delay(10); + /* assumes apic is not an 82489dx */ for(i = 0; i < 2; i++){ lapicw(LapicICRHI, crhi); + /* make apic's processor start at v in real mode */ lapicw(LapicICRLO, LapicFIELD|ApicEDGE|ApicSTARTUP|(v/BY2PG)); microdelay(200); } |