/**
* acpi_idle_do_entry - enter idle state using the appropriate method
* @cx: cstate data
*
* Caller disables interrupt before call and enables interrupt after return.
*/
static void __cpuidle acpi_idle_do_entry(struct acpi_processor_cx *cx)
{
if (cx->entry_method == ACPI_CSTATE_FFH) {
/* Call into architectural FFH based C-state */
acpi_processor_ffh_cstate_enter(cx);
} else if (cx->entry_method == ACPI_CSTATE_HALT) {
acpi_safe_halt();
} else {
/* IO port based C-state */
inb(cx->address);
/* Dummy wait op - must do something useless after P_LVL2 read
because chipsets cannot guarantee that STPCLK# signal
gets asserted in time to freeze execution properly. */
inl(acpi_gbl_FADT.xpm_timer_block.address);
}
}
static inline void acpi_idle_do_entry(struct acpi_processor_cx *cx)
{
stop_critical_timings();
if (cx->entry_method == ACPI_CSTATE_FFH) {
acpi_processor_ffh_cstate_enter(cx);
} else if (cx->entry_method == ACPI_CSTATE_HALT) {
acpi_safe_halt();
} else {
inb(cx->address);
inl(acpi_gbl_FADT.xpm_timer_block.address);
}
start_critical_timings();
}
static void acpi_idle_do_entry(struct acpi_processor_cx *cx)
{
switch ( cx->entry_method )
{
case ACPI_CSTATE_EM_FFH:
/* Call into architectural FFH based C-state */
acpi_processor_ffh_cstate_enter(cx);
return;
case ACPI_CSTATE_EM_SYSIO:
/* IO port based C-state */
inb(cx->address);
/* Dummy wait op - must do something useless after P_LVL2 read
because chipsets cannot guarantee that STPCLK# signal
gets asserted in time to freeze execution properly. */
inl(pmtmr_ioport);
return;
case ACPI_CSTATE_EM_HALT:
safe_halt();
local_irq_disable();
return;
}
}
