diff options
Diffstat (limited to 'Silicon/Socionext/SynQuacer/AcpiTables/AcpiSsdtRootPci.asl')
| -rw-r--r-- | Silicon/Socionext/SynQuacer/AcpiTables/AcpiSsdtRootPci.asl | 40 |
1 files changed, 40 insertions, 0 deletions
diff --git a/Silicon/Socionext/SynQuacer/AcpiTables/AcpiSsdtRootPci.asl b/Silicon/Socionext/SynQuacer/AcpiTables/AcpiSsdtRootPci.asl index 3f0ee2cdb4..24a3aa3a5b 100644 --- a/Silicon/Socionext/SynQuacer/AcpiTables/AcpiSsdtRootPci.asl +++ b/Silicon/Socionext/SynQuacer/AcpiTables/AcpiSsdtRootPci.asl @@ -31,6 +31,26 @@ DefinitionBlock ("SsdtPci.aml", "SSDT", 1, "SNI", "SYNQUACR", Name (_BBN, Zero) // PCI Base Bus Number
Name (_CCA, 1) // Cache Coherency Attribute
+ OperationRegion (BDF1, SystemMemory, SYNQUACER_PCI_SEG0_CONFIG_BASE, 0x10000)
+ Field (BDF1, DWordAcc, NoLock, Preserve) {
+ Offset (0x8000),
+ VPID, 16,
+ }
+
+ Method (_STA, 0x0, Serialized) {
+ //
+ // Check whether the VID/PID of device #1 on bus #0 equals 0xffff.
+ // If this is not the case, we are dealing with a ghost device,
+ // which means we are running with outdated SCP firmware and we
+ // should keep this PCIe RC disabled.
+ //
+ Store (VPID, local1)
+ If (!LEqual (local1, 0xffff)) {
+ Return (0x0)
+ }
+ Return (0xf)
+ }
+
// PCI Routing Table
Name (_PRT, Package () {
Package () { 0xFFFF, 0, Zero, 222 }, // INTA
@@ -149,6 +169,26 @@ DefinitionBlock ("SsdtPci.aml", "SSDT", 1, "SNI", "SYNQUACR", Name (_BBN, Zero) // PCI Base Bus Number
Name (_CCA, 1) // Cache Coherency Attribute
+ OperationRegion (BDF1, SystemMemory, SYNQUACER_PCI_SEG1_CONFIG_BASE, 0x10000)
+ Field (BDF1, DWordAcc, NoLock, Preserve) {
+ Offset (0x8000),
+ VPID, 16,
+ }
+
+ Method (_STA, 0x0, Serialized) {
+ //
+ // Check whether the VID/PID of device #1 on bus #0 equals 0xffff.
+ // If this is not the case, we are dealing with a ghost device,
+ // which means we are running with outdated SCP firmware and we
+ // should keep this PCIe RC disabled.
+ //
+ Store (VPID, local1)
+ If (!LEqual (local1, 0xffff)) {
+ Return (0x0)
+ }
+ Return (0xf)
+ }
+
// PCI Routing Table
Name (_PRT, Package () {
Package () { 0xFFFF, 0, Zero, 214 }, // INTA
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