/*
* Quiesce CPUs in a multiprocessor machine before resuming. We need to do
* this since the APs will be hatched (but waiting for CPUF_GO), and we don't
* want the APs to be executing code and causing side effects during the
* unpack operation.
*/
void
hibernate_quiesce_cpus(void)
{
KASSERT(CPU_IS_PRIMARY(curcpu()));
/* Start the hatched (but idling) APs */
cpu_boot_secondary_processors();
/* Demote the APs to real mode */
x86_broadcast_ipi(X86_IPI_HALT_REALMODE);
/* Wait a bit for the APs to park themselves */
delay(1000000);
}
static int
xen_timer_handler(void *arg, struct trapframe *regs)
{
int64_t delta;
#if defined(I586_CPU) || defined(I686_CPU)
static int microset_iter; /* call cc_microset once/sec */
struct cpu_info *ci = curcpu();
/*
* If we have a cycle counter, do the microset thing.
*/
if (ci->ci_feature_flags & CPUID_TSC) {
if (
#if defined(MULTIPROCESSOR)
CPU_IS_PRIMARY(ci) &&
#endif
(microset_iter--) == 0) {
microset_iter = hz - 1;
#if defined(MULTIPROCESSOR)
x86_broadcast_ipi(X86_IPI_MICROSET);
#endif
cc_microset_time = time;
cc_microset(ci);
}
}
#endif
get_time_values_from_xen();
delta = (int64_t)(shadow_system_time + get_tsc_offset_ns() -
processed_system_time);
while (delta >= NS_PER_TICK) {
hardclock((struct clockframe *)regs);
delta -= NS_PER_TICK;
processed_system_time += NS_PER_TICK;
}
return 0;
}
void
boot(int howto)
{
if (cold) {
/*
* If the system is cold, just halt, unless the user
* explicitly asked for reboot.
*/
if ((howto & RB_USERREQ) == 0)
howto |= RB_HALT;
goto haltsys;
}
boothowto = howto;
if ((howto & RB_NOSYNC) == 0 && waittime < 0) {
waittime = 0;
if (curproc == NULL)
curproc = &proc0; /* XXX */
vfs_shutdown();
/*
* If we've been adjusting the clock, the todr
* will be out of synch; adjust it now.
*/
if ((howto & RB_TIMEBAD) == 0) {
resettodr();
} else {
printf("WARNING: not updating battery clock\n");
}
}
/* Disable interrupts. */
splhigh();
/* Do a dump if requested. */
if (howto & RB_DUMP)
dumpsys();
haltsys:
doshutdownhooks();
#ifdef MULTIPROCESSOR
x86_broadcast_ipi(X86_IPI_HALT);
#endif
if (howto & RB_HALT) {
#if NACPI > 0 && !defined(SMALL_KERNEL)
extern int acpi_s5, acpi_enabled;
if (acpi_enabled) {
delay(500000);
if (howto & RB_POWERDOWN || acpi_s5)
acpi_powerdown();
}
#endif
printf("\n");
printf("The operating system has halted.\n");
printf("Please press any key to reboot.\n\n");
cnpollc(1); /* for proper keyboard command handling */
cngetc();
cnpollc(0);
}
printf("rebooting...\n");
if (cpureset_delay > 0)
delay(cpureset_delay * 1000);
cpu_reset();
for(;;) ;
/*NOTREACHED*/
}
