Advanced Configuration and Power Interface Specification

Advanced Configuration and Power Interface Specification
6.2.17.1 _CCA Example ASL:
Scope (\_SB) {
…
Device (XHCI) {
…
}
Name (_CCA, ZERO) // Cache-incoherent bus-master, child of \_SB
…
}
…
Device (PCI0) {
// Root PCI Bus
…
Name (_CCA, ONE) // Cache-coherent bus-master, child of \_SB
…
Device (PRT0) {
…
// Bus-master-capable, not a child of \_SB
…
// Will inherit coherency from PCI0, no _CCA required
Device (NIC0) {
… // Bus-master-capable, not a child of \_SB
… // Will inherit coherency from PRT0, no _CCA required
}
}
}
…
Device (SDHC) {
…
Name (_CCA, ONE)
// Cache-coherent bus-master-capable, child of \_SB
…
}
…
Device (GPIO) {
…
// Not bus-master-capable
…
// _CCA not valid
}
…
Device (DMAC) {
…
// DMA controller; _CCA must be specified
Name (_CCA, ONE)
// Cache coherent bus-master, child of \_SB
…
}
…
Device (SPI1) {
…
Name (_CRS, ResourceTemplate()
{
FixedDMA(…)// Sharing the DMA, thus inherits coherency from it
…
…
})
…
// _CCA not valid
}
6.3 Device Insertion, Removal, and Status Objects
The objects defined in this section provide mechanisms for handling dynamic insertion and removal
of devices and for determining device and notification processing status.
Device insertion and removal objects are also used for docking and undocking mobile platforms to
and from a peripheral expansion dock. These objects give information about whether or not devices
330 April, 2015 Version 6.0