diff options
Diffstat (limited to 'OvmfPkg')
| -rw-r--r-- | OvmfPkg/AcpiTables/Dsdt.asl | 12 |
1 files changed, 7 insertions, 5 deletions
diff --git a/OvmfPkg/AcpiTables/Dsdt.asl b/OvmfPkg/AcpiTables/Dsdt.asl index e12c3e9a07..91d412b6d5 100644 --- a/OvmfPkg/AcpiTables/Dsdt.asl +++ b/OvmfPkg/AcpiTables/Dsdt.asl @@ -213,12 +213,13 @@ DefinitionBlock ("Dsdt.aml", "DSDT", 1, "INTEL ", "OVMF ", 3) { //
// PCI to ISA Bridge (Bus 0, Device 1, Function 0)
+ // "Low Pin Count"
//
Device (LPC) {
Name (_ADR, 0x00010000)
//
- // PCI Interrupt Routing Configuration Registers
+ // PCI Interrupt Routing Configuration Registers, PIRQRC[A:D]
//
OperationRegion (PRR0, PCI_Config, 0x60, 0x04)
Field (PRR0, ANYACC, NOLOCK, PRESERVE) {
@@ -230,17 +231,19 @@ DefinitionBlock ("Dsdt.aml", "DSDT", 1, "INTEL ", "OVMF ", 3) { //
// _STA method for LNKA, LNKB, LNKC, LNKD
+ // Arg0[in]: value of PIRA / PIRB / PIRC / PIRD
//
Method (PSTA, 1, NotSerialized) {
- If (And (Arg0, 0x80)) {
- Return (0x9)
+ If (And (Arg0, 0x80)) { // disable-bit set?
+ Return (0x9) // "device present" | "functioning properly"
} Else {
- Return (0xB)
+ Return (0xB) // same | "enabled and decoding resources"
}
}
//
// _CRS method for LNKA, LNKB, LNKC, LNKD
+ // Arg0[in]: value of PIRA / PIRB / PIRC / PIRD
//
Method (PCRS, 1, NotSerialized) {
//
@@ -527,4 +530,3 @@ DefinitionBlock ("Dsdt.aml", "DSDT", 1, "INTEL ", "OVMF ", 3) { }
}
}
-
|