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replace bogus loops with slightly less bogus loops.

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rsc 2007-08-10 17:05:46 +00:00
parent 3d145283a2
commit 6861140a66
1 changed files with 3 additions and 5 deletions
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8
lapic.c
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@ -201,17 +201,15 @@ lapic_startap(uchar apicid, int v)
lapic_write(LAPIC_ICRHI, crhi); lapic_write(LAPIC_ICRHI, crhi);
lapic_write(LAPIC_ICRLO, LAPIC_FIELD|APIC_LEVEL| lapic_write(LAPIC_ICRLO, LAPIC_FIELD|APIC_LEVEL|
LAPIC_ASSERT|APIC_INIT); LAPIC_ASSERT|APIC_INIT);
for(j=0; j<10000; j++); // 200us
while(j++ < 10000) {;}
lapic_write(LAPIC_ICRLO, LAPIC_FIELD|APIC_LEVEL| lapic_write(LAPIC_ICRLO, LAPIC_FIELD|APIC_LEVEL|
LAPIC_DEASSERT|APIC_INIT); LAPIC_DEASSERT|APIC_INIT);
for(j=0; j<1000000; j++); // 10ms
while(j++ < 1000000) {;}
// in p9 code, this was i < 2, which is what the spec says on page B-3 // in p9 code, this was i < 2, which is what the spec says on page B-3
for(i = 0; i < 1; i++){ for(i = 0; i < 1; i++){
lapic_write(LAPIC_ICRHI, crhi); lapic_write(LAPIC_ICRHI, crhi);
lapic_write(LAPIC_ICRLO, LAPIC_FIELD|APIC_EDGE|APIC_STARTUP|(v/4096)); lapic_write(LAPIC_ICRLO, LAPIC_FIELD|APIC_EDGE|APIC_STARTUP|(v/4096));
while(j++ < 100000) {;} for(j=0; j<10000; j++); // 200us
} }
} }