static void
acpi_power_off (void)
{
printk("%s called\n",__FUNCTION__);
/* Some SMP machines only can poweroff in boot CPU */
set_cpus_allowed(current, cpumask_of_cpu(0));
acpi_enter_sleep_state_prep(ACPI_STATE_S5);
ACPI_DISABLE_IRQS();
acpi_enter_sleep_state(ACPI_STATE_S5);
}
/**
* acpi_suspend - OS-agnostic system suspend/resume support (S? states)
* @state: state we're entering
*
*/
acpi_status
acpi_suspend (
u32 state)
{
acpi_status status;
/* only support S1 and S5 on kernel 2.4 */
if (state != ACPI_STATE_S1 && state != ACPI_STATE_S4
&& state != ACPI_STATE_S5)
return AE_ERROR;
if (ACPI_STATE_S4 == state) {
/* For s4bios, we need a wakeup address. */
if (1 == acpi_gbl_FACS->S4bios_f &&
0 != acpi_gbl_FADT->smi_cmd) {
if (!acpi_wakeup_address)
return AE_ERROR;
acpi_set_firmware_waking_vector((acpi_physical_address) acpi_wakeup_address);
} else
/* We don't support S4 under 2.4. Give up */
return AE_ERROR;
}
status = acpi_system_save_state(state);
if (!ACPI_SUCCESS(status) && state != ACPI_STATE_S5)
return status;
acpi_enter_sleep_state_prep(state);
/* disable interrupts and flush caches */
ACPI_DISABLE_IRQS();
ACPI_FLUSH_CPU_CACHE();
/* perform OS-specific sleep actions */
status = acpi_system_suspend(state);
/* Even if we failed to go to sleep, all of the devices are in an suspended
* mode. So, we run these unconditionaly to make sure we have a usable system
* no matter what.
*/
acpi_leave_sleep_state(state);
acpi_system_restore_state(state);
/* make sure interrupts are enabled */
ACPI_ENABLE_IRQS();
/* reset firmware waking vector */
acpi_set_firmware_waking_vector((acpi_physical_address) 0);
return status;
}
static void
acpi_power_off (void)
{
if (unlikely(in_interrupt()))
BUG();
/* Some SMP machines only can poweroff in boot CPU */
set_cpus_allowed(current, 1UL << cpu_logical_map(0));
acpi_enter_sleep_state_prep(ACPI_STATE_S5);
ACPI_DISABLE_IRQS();
acpi_enter_sleep_state(ACPI_STATE_S5);
printk(KERN_EMERG "ACPI: can not power off machine\n");
}
int acpi_sleep_prepare(u32 acpi_state)
{
#ifdef CONFIG_ACPI_SLEEP
/* do we have a wakeup address for S2 and S3? */
if (acpi_state == ACPI_STATE_S3) {
if (!acpi_wakeup_address) {
return -EFAULT;
}
acpi_set_firmware_waking_vector((acpi_physical_address)
virt_to_phys((void *)
acpi_wakeup_address));
}
ACPI_FLUSH_CPU_CACHE();
acpi_enable_wakeup_device_prep(acpi_state);
#endif
acpi_enter_sleep_state_prep(acpi_state);
return 0;
}
static int acpi_sleep_prepare(u32 acpi_state)
{
#ifdef CONFIG_ACPI_SLEEP
/* do we have a wakeup address for S2 and S3? */
if (acpi_state == ACPI_STATE_S3) {
if (!acpi_wakeup_address) {
return -EFAULT;
}
acpi_set_firmware_waking_vector(
(acpi_physical_address)acpi_wakeup_address);
}
ACPI_FLUSH_CPU_CACHE();
acpi_enable_wakeup_device_prep(acpi_state);
#endif
printk(KERN_INFO PREFIX "Preparing to enter system sleep state S%d\n",
acpi_state);
acpi_enter_sleep_state_prep(acpi_state);
return 0;
}
static void acpi_db_do_one_sleep_state(u8 sleep_state)
{
acpi_status status;
u8 sleep_type_a;
u8 sleep_type_b;
/* Validate parameter */
if (sleep_state > ACPI_S_STATES_MAX) {
acpi_os_printf("Sleep state %d out of range (%d max)\n",
sleep_state, ACPI_S_STATES_MAX);
return;
}
acpi_os_printf("\n---- Invoking sleep state S%d (%s):\n",
sleep_state, acpi_gbl_sleep_state_names[sleep_state]);
/* Get the values for the sleep type registers (for display only) */
status =
acpi_get_sleep_type_data(sleep_state, &sleep_type_a, &sleep_type_b);
if (ACPI_FAILURE(status)) {
acpi_os_printf("Could not evaluate [%s] method, %s\n",
acpi_gbl_sleep_state_names[sleep_state],
acpi_format_exception(status));
return;
}
acpi_os_printf
("Register values for sleep state S%d: Sleep-A: %.2X, Sleep-B: %.2X\n",
sleep_state, sleep_type_a, sleep_type_b);
/* Invoke the various sleep/wake interfaces */
acpi_os_printf("**** Sleep: Prepare to sleep (S%d) ****\n",
sleep_state);
status = acpi_enter_sleep_state_prep(sleep_state);
if (ACPI_FAILURE(status)) {
goto error_exit;
}
acpi_os_printf("**** Sleep: Going to sleep (S%d) ****\n", sleep_state);
status = acpi_enter_sleep_state(sleep_state);
if (ACPI_FAILURE(status)) {
goto error_exit;
}
acpi_os_printf("**** Wake: Prepare to return from sleep (S%d) ****\n",
sleep_state);
status = acpi_leave_sleep_state_prep(sleep_state);
if (ACPI_FAILURE(status)) {
goto error_exit;
}
acpi_os_printf("**** Wake: Return from sleep (S%d) ****\n",
sleep_state);
status = acpi_leave_sleep_state(sleep_state);
if (ACPI_FAILURE(status)) {
goto error_exit;
}
return;
error_exit:
ACPI_EXCEPTION((AE_INFO, status, "During invocation of sleep state S%d",
sleep_state));
}
