/*
* Drop into the debugger by sending an IPI NMI to the boot processor.
*/
static void
watchdog_ipi_nmi(void)
{
/*
* Deliver NMI to the boot processor. Why not?
*/
lapic_ipi_raw(APIC_DEST_DESTFLD | APIC_TRIGMOD_EDGE |
APIC_LEVEL_ASSERT | APIC_DESTMODE_PHY | APIC_DELMODE_NMI,
boot_cpu_id);
lapic_ipi_wait(-1);
}
static int
acpi_wakeup_ap(struct acpi_softc *sc, int cpu)
{
int vector = (WAKECODE_PADDR(sc) >> 12) & 0xff;
int apic_id = cpu_apic_ids[cpu];
int ms;
WAKECODE_FIXUP(wakeup_xpcb, struct xpcb *, &stopxpcbs[cpu]);
WAKECODE_FIXUP(wakeup_gdt, uint16_t, stopxpcbs[cpu].xpcb_gdt.rd_limit);
WAKECODE_FIXUP(wakeup_gdt + 2, uint64_t,
stopxpcbs[cpu].xpcb_gdt.rd_base);
WAKECODE_FIXUP(wakeup_cpu, int, cpu);
/* do an INIT IPI: assert RESET */
lapic_ipi_raw(APIC_DEST_DESTFLD | APIC_TRIGMOD_EDGE |
APIC_LEVEL_ASSERT | APIC_DESTMODE_PHY | APIC_DELMODE_INIT, apic_id);
/* wait for pending status end */
lapic_ipi_wait(-1);
/* 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);
/*
* next we do a STARTUP IPI: the previous INIT IPI might still be
* latched, (P5 bug) this 1st STARTUP would then terminate
* immediately, and the previously started INIT IPI would continue. OR
* the previous INIT IPI has already run. and this STARTUP IPI will
* run. OR the previous INIT IPI was ignored. and this STARTUP IPI
* will run.
*/
/* do a STARTUP IPI */
lapic_ipi_raw(APIC_DEST_DESTFLD | APIC_TRIGMOD_EDGE |
APIC_LEVEL_DEASSERT | APIC_DESTMODE_PHY | APIC_DELMODE_STARTUP |
vector, apic_id);
lapic_ipi_wait(-1);
DELAY(200); /* wait ~200uS */
/*
* finally we do a 2nd STARTUP IPI: this 2nd STARTUP IPI should run IF
* the previous STARTUP IPI was cancelled by a latched INIT IPI. OR
* this STARTUP IPI will be ignored, as only ONE STARTUP IPI is
* recognized after hardware RESET or INIT IPI.
*/
lapic_ipi_raw(APIC_DEST_DESTFLD | APIC_TRIGMOD_EDGE |
APIC_LEVEL_DEASSERT | APIC_DESTMODE_PHY | APIC_DELMODE_STARTUP |
vector, apic_id);
lapic_ipi_wait(-1);
DELAY(200); /* wait ~200uS */
/* Wait up to 5 seconds for it to start. */
for (ms = 0; ms < 5000; ms++) {
if (*(int *)(WAKECODE_VADDR(sc) + wakeup_cpu) == 0)
return (1); /* return SUCCESS */
DELAY(1000);
}
return (0); /* return FAILURE */
}