Advanced Configuration and Power Interface Specification

Device Configuration
Method(_EJ0, 1)
{
Store(Zero, ^^S3LE)
}
} // end SLT3
} // end scope \_SB.PCI4
Scope (\_GPE)
{
Method(_E13)
{
Store(One, \_SB.PCI4.S3LE)
Notify(\_SB.PCI4.SLT3, 3)
}
}
// Successful ejection sequence
// Turn off Ejection Progress LED
// Turn on ejection request LED
// Ejection request driven from GPE13
6.3.6 _RMV (Remove)
The optional _RMV object indicates to OSPM whether the device can be removed while the system
is in the working state and does not require any ACPI system firmware actions to be performed for
the device to be safely removed from the system (in other words, any device that only supports
surprise-style removal). Any such removable device that does not have _LCK or _EJx control
methods must have an _RMV object. This allows OSPM to indicate to the user that the device can be
removed and to provide a way for shutting down the device before removing it. OSPM will
transition the device into D3 before telling the user it is safe to remove the device.
This method is reevaluated after a device-check notification.
Arguments:
None
Return Value:
An Integer containing the device removal status
0 – The device cannot be removed
1 – The device can be removed
Note: Operating Systems implementing ACPI 1.0 interpret the presence of this object to mean that the
device is removable.
6.3.7 _STA (Status)
This object returns the current status of a device, which can be one of the following: enabled,
disabled, or removed.
OSPM evaluates the _STA object before it evaluates a device _INI method. The return values of the
Present and Functioning bits determines whether _INI should be evaluated and whether children of
the device should be enumerated and initialized. See Section 6.5.1, “_INI (Init)”.
If a device object describes a device that is not on an enumerable bus and the device object does not
have an _STA object, then OSPM assumes that the device is present, enabled, shown in the UI, and
functioning.
This method must not reference any operation regions that have not been declared available by a
_REG method.
Version 6.0 341