diff options
| -rw-r--r-- | src/soc/intel/skylake/acpi/systemagent.asl | 12 |
1 files changed, 9 insertions, 3 deletions
diff --git a/src/soc/intel/skylake/acpi/systemagent.asl b/src/soc/intel/skylake/acpi/systemagent.asl index b2e691ddf8..962d9ef879 100644 --- a/src/soc/intel/skylake/acpi/systemagent.asl +++ b/src/soc/intel/skylake/acpi/systemagent.asl @@ -187,14 +187,20 @@ Method (_CRS, 0, Serialized) /* * Fix up PCI memory region * Start with Top of Lower Usable DRAM + * Lower 20 bits of TOLUD register need to be masked since they contain lock and + * reserved bits. */ - Local0 = \_SB.PCI0.MCHC.TLUD + Local0 = \_SB.PCI0.MCHC.TLUD & (0xfff << 20) Local1 = \_SB.PCI0.MCHC.MEBA /* Check if ME base is equal */ If (Local0 == Local1) { - /* Use Top Of Memory instead */ - Local0 = \_SB.PCI0.MCHC.TOM + /* + * Use Top Of Memory instead + * Lower 20 bits of TOM register need to be masked since they contain lock and + * reserved bits. + */ + Local0 = \_SB.PCI0.MCHC.TOM & (0x7ffff << 20) } Store (Local0, PMIN) |