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Add a 10 millisecond delay after sending the initial INIT IPI. This

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matches the algorithm in the MP specification (1.4).  Previously we
were sending out the deassert INIT IPI immediately after the initial
INIT IPI was sent.
This commit is contained in:
John Baldwin 2012-08-13 16:33:22 +00:00
parent 1221cc675d
commit a4284ef768
2 changed files with 4 additions and 2 deletions
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3
sys/amd64/amd64/mp_machdep.c
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@ -1048,14 +1048,15 @@ ipi_startup(int apic_id, int vector)
/* wait for pending status end */
lapic_ipi_wait(-1);
DELAY(10000); /* wait ~10mS */
/* do an INIT IPI: deassert RESET */
lapic_ipi_raw(APIC_DEST_ALLESELF | APIC_TRIGMOD_LEVEL |
APIC_LEVEL_DEASSERT | APIC_DESTMODE_PHY | APIC_DELMODE_INIT, 0);
/* wait for pending status end */
DELAY(10000); /* wait ~10mS */
lapic_ipi_wait(-1);
DELAY(10000); /* wait ~10mS */
/*
* next we do a STARTUP IPI: the previous INIT IPI might still be

3
sys/i386/i386/mp_machdep.c
View File

@ -1148,14 +1148,15 @@ ipi_startup(int apic_id, int vector)
/* wait for pending status end */
lapic_ipi_wait(-1);
DELAY(10000); /* wait ~10mS */
/* do an INIT IPI: deassert RESET */
lapic_ipi_raw(APIC_DEST_ALLESELF | APIC_TRIGMOD_LEVEL |
APIC_LEVEL_DEASSERT | APIC_DESTMODE_PHY | APIC_DELMODE_INIT, 0);
/* wait for pending status end */
DELAY(10000); /* wait ~10mS */
lapic_ipi_wait(-1);
DELAY(10000); /* wait ~10mS */
/*
* next we do a STARTUP IPI: the previous INIT IPI might still be