Advanced Configuration and Power Interface Specification

Scope(\_SB.PCI0) {
Advanced Configuration and Power Interface Specification
Device(DOCK1) { // Pass through dock – DOCK1
Name(_ADR, …)
Method(_EJ0, 0) {…}
Method(_DCK, 1) {…}
Name(_BDN, …)
Method(_STA, 0) {0xF}
Name(_EDL, Package( ) { // DOCK1 has two dependent devices – IDE2 and CB2
\_SB.PCI0.IDE2,
\_SB.PCI0.CB2})
}
Device(DOCK2) { // Pass through dock – DOCK2
Name(_ADR, …)
Method(_EJ0, 0) {…}
Method(_DCK, 1) {…}
Name(_BDN, …)
Method(_STA, 0) {0x0}
Name(_EDL, Package( ) { // DOCK2 has one dependent device – IDE2
\_SB.PCI0.IDE2})
}
Device(IDE1) { // IDE Drive1 not dependent on the dock
Name(_ADR, …)
}
Device(IDE2) { // IDE Drive2
Name(_ADR, …)
Name(_EJD,”\\_SB.PCI0.DOCK1”) // Dependent on DOCK1
}
Device(CB2) { // CardBus Controller
Name(_ADR, …)
Name(_EJD,”\\_SB.PCI0.DOCK1”) // Dependent on DOCK1
}
} // end \_SB.PCIO
6.3.3 _EJx (Eject)
These control methods are optional and are supplied for devices that support a software-controlled
VCR-style ejection mechanism or that require an action be performed such as isolation of power/
data lines before the device can be removed from the system. To support warm (system is in a sleep
state) and hot (system is in S0) removal, an _EJx control method is listed for each sleep state from
which the device supports removal, where x is the sleeping state supported. For example, _EJ0
indicates the device supports hot removal; _EJ1–EJ4 indicate the device supports warm removal.
Arguments: (1)
Arg0 – An Integer containing a device ejection control
0 – Cancel a mark for ejection request (EJ0 will never be called with this value)
1 – Hot eject or mark for ejection
Return Value:
None
For hot removal, the device must be immediately ejected when OSPM calls the _EJ0 control
method. The _EJ0 control method does not return until ejection is complete. After calling _EJ0,
Hewlett-Packard/Intel/Microsoft/Phoenix/Toshiba 301