Advanced Configuration and Power Interface Specification

Advanced Configuration and Power Interface Specification
slot or for performing configuration of a PCI devices not configured by the BIOS at system boot.
The object is placed under a PCI bus where this behavior is desired, such as a bus with hot-plug
slots. _HPP provided settings apply to all child buses, until another _HPP object is encountered.
Arguments:
None
Return Value:
A Package containing the Integer hot-plug parameters
Example:
Method (_HPP, 0) {
Return (Package(4){
0x08, // CacheLineSize in DWORDS
0x40, // LatencyTimer in PCI clocks
0x01, // Enable SERR (Boolean)
0x00
// Enable PERR (Boolean)
})
}
Table 6-172 HPP Package Contents
Field Object Type Definition
Cache-line size Integer Cache-line size reported in number of DWORDs.
Latency timer Integer Latency timer value reported in number of PCI clock cycles.
Enable SERR Integer When set to 1, indicates that action must be performed to enable SERR
in the command register.
Enable PERR Integer When set to 1, indicates that action must be performed to enable PERR
in the command register.
6.2.8.1 Example: Using _HPP
304 April, 2015 Version 6.0