Advanced Configuration and Power Interface Specification

Processor Configuration and Control
PowerResource(PWRA,0,0) {…}
PowerResource(PWRB,0,0) {…}
PowerResource(PWRC,0,0) {…}
PowerResource(PWRD,0,0) {…}
PowerResource(PWRE,0,1) {…}
Device (FOO) {
_S0W(4)
//Device in D3Cold can wake system from S0-idle
Name(_PR0,Package(){PWRA, PWRB, PWRC})
Name(_PR2,Package(){PWRA, PWRB})
Name(_PR3,Package(){PWRA})
Name(_PRE,Package(){PWRD})
Name(_PRW,Package(){0, 0, PWRD} // PWRD must be ON for FOO to wake system
}
Device (BAR) {
_S0W(3)
Name(_PR0,Package(){PWRA, PWRB})
Name(_PR3,Package(){PWRC})
Name(_PRW,Package(){PWRC})
// Device in D3Hot can wake system from S0-idle
// PWRC must be ON for BAR to wake system
}
Device (BAH) {
_S0W(0)
}
Name(_PR0,Package(){PWRA, PWRB, PWRC})
Device (SYM) {
Name(_RDI,
Package() {
0, // Version
Package(){}
…
Package(){PWRA, PWRB}
// This device can only wake the system from
// S0-idle if it is in D0
// Local State 1 is Shallow;
// Devices FOO, BAR and BAH can wake
// the system if enabled for wake
// RDI for Local State 2. State is deeper
// Device BAH cannot wake the system if this
// state is used, as it needs PWRA and PWRB
// to be able to wake the system
Package(){PWRA, PWRB, PWRC} // RDI for Local State 3.
// Devices BAH and BAR cannot wake
// the system, BAH needs PWRA, PWRB
// and PWRC, and BAR needs PWRC
// for all devices
Package(){PWRA, PWRB, PWRC, PWRD} // None of the devices listed
// above could wake the system
})
The example above declares a set of power resources (PWRA/B/C/D). Additionally, it has four
system level local states that have the following dependencies:
• LPI 1: Has no power resources dependencies
• LPI 2: Requires PWRA and PWRB to be off
• LPI 3: Requires PWRA, PWRB and PWRC to be off
• LPI 4: Requires all of the power resources in the example to be off
Version 6.0 457