DynamicTablesPkg: AcpiSsdtPcieLibArm: Correct translation value

The translation value in ACPI should be the difference between the CPU and PCIe address. Signed-off-by: Jeff Brasen <[email protected]> Reviewed-by: Pierre Gondois <[email protected]> Reviewed-by: Sami Mujawar <[email protected]>
zurcher · Jul 19, 2022 · 6cda306 · 6cda306
1 parent f0064ac
commit 6cda306
Showing 1 changed file with 12 additions and 6 deletions.
diff --git a/DynamicTablesPkg/Library/Acpi/Arm/AcpiSsdtPcieLibArm/SsdtPcieGenerator.c b/DynamicTablesPkg/Library/Acpi/Arm/AcpiSsdtPcieLibArm/SsdtPcieGenerator.c
@@ -540,6 +540,7 @@ GeneratePciCrs (
   UINT32                       RefCount;
   CM_ARM_PCI_ADDRESS_MAP_INFO  *AddrMapInfo;
   AML_OBJECT_NODE_HANDLE       CrsNode;
+  BOOLEAN                      IsPosDecode;
 
   ASSERT (Generator != NULL);
   ASSERT (CfgMgrProtocol != NULL);
@@ -609,19 +610,24 @@ GeneratePciCrs (
     }
 
     Translation = (AddrMapInfo->CpuAddress != AddrMapInfo->PciAddress);
+    if (AddrMapInfo->CpuAddress >= AddrMapInfo->PciAddress) {
+      IsPosDecode = TRUE;
+    } else {
+      IsPosDecode = FALSE;
+    }
 
     switch (AddrMapInfo->SpaceCode) {
       case PCI_SS_IO:
         Status = AmlCodeGenRdDWordIo (
                    FALSE,
                    TRUE,
                    TRUE,
-                   TRUE,
+                   IsPosDecode,
                    3,
                    0,
                    AddrMapInfo->PciAddress,
                    AddrMapInfo->PciAddress + AddrMapInfo->AddressSize - 1,
-                   Translation ? AddrMapInfo->CpuAddress : 0,
+                   Translation ? AddrMapInfo->CpuAddress - AddrMapInfo->PciAddress : 0,
                    AddrMapInfo->AddressSize,
                    0,
                    NULL,
@@ -635,15 +641,15 @@ GeneratePciCrs (
       case PCI_SS_M32:
         Status = AmlCodeGenRdDWordMemory (
                    FALSE,
-                   TRUE,
+                   IsPosDecode,
                    TRUE,
                    TRUE,
                    TRUE,
                    TRUE,
                    0,
                    AddrMapInfo->PciAddress,
                    AddrMapInfo->PciAddress + AddrMapInfo->AddressSize - 1,
-                   Translation ? AddrMapInfo->CpuAddress : 0,
+                   Translation ? AddrMapInfo->CpuAddress - AddrMapInfo->PciAddress : 0,
                    AddrMapInfo->AddressSize,
                    0,
                    NULL,
@@ -657,15 +663,15 @@ GeneratePciCrs (
       case PCI_SS_M64:
         Status = AmlCodeGenRdQWordMemory (
                    FALSE,
-                   TRUE,
+                   IsPosDecode,
                    TRUE,
                    TRUE,
                    TRUE,
                    TRUE,
                    0,
                    AddrMapInfo->PciAddress,
                    AddrMapInfo->PciAddress + AddrMapInfo->AddressSize - 1,
-                   Translation ? AddrMapInfo->CpuAddress : 0,
+                   Translation ? AddrMapInfo->CpuAddress - AddrMapInfo->PciAddress : 0,
                    AddrMapInfo->AddressSize,
                    0,
                    NULL,