/*
* Called with interrupts enabled.
*/
void
acpicpu_md_cstate_enter(int method, int state)
{
struct cpu_info *ci = curcpu();
KASSERT(ci->ci_ilevel == IPL_NONE);
switch (method) {
case ACPICPU_C_STATE_FFH:
x86_monitor(&ci->ci_want_resched, 0, 0);
if (__predict_false(ci->ci_want_resched != 0))
return;
x86_mwait((state - 1) << 4, 0);
break;
case ACPICPU_C_STATE_HALT:
x86_disable_intr();
if (__predict_false(ci->ci_want_resched != 0)) {
x86_enable_intr();
return;
}
x86_stihlt();
break;
}
}
static inline void
acpi_cstate_ffh_enter(CpuidleCstate *cState)
{
cpu_ent *cpu = get_cpu_struct();
if (cpu->invoke_scheduler)
return;
x86_monitor((void *)&cpu->invoke_scheduler, 0, 0);
if (!cpu->invoke_scheduler)
x86_mwait((unsigned long)cState->pData, 1);
}