Example #1
0
/*
 * 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 */
}