\r
#include <Protocol/FdtClient.h>\r
\r
+//\r
+// We expect the "ranges" property of "pci-host-ecam-generic" to consist of\r
+// records like this.\r
+//\r
+#pragma pack (1)\r
+typedef struct {\r
+ UINT32 Type;\r
+ UINT64 ChildBase;\r
+ UINT64 CpuBase;\r
+ UINT64 Size;\r
+} DTB_PCI_HOST_RANGE_RECORD;\r
+#pragma pack ()\r
+\r
+#define DTB_PCI_HOST_RANGE_RELOCATABLE BIT31\r
+#define DTB_PCI_HOST_RANGE_PREFETCHABLE BIT30\r
+#define DTB_PCI_HOST_RANGE_ALIASED BIT29\r
+#define DTB_PCI_HOST_RANGE_MMIO32 BIT25\r
+#define DTB_PCI_HOST_RANGE_MMIO64 (BIT25 | BIT24)\r
+#define DTB_PCI_HOST_RANGE_IO BIT24\r
+#define DTB_PCI_HOST_RANGE_TYPEMASK (BIT31 | BIT30 | BIT29 | BIT25 | BIT24)\r
+\r
+STATIC\r
+RETURN_STATUS\r
+GetPciIoTranslation (\r
+ IN FDT_CLIENT_PROTOCOL *FdtClient,\r
+ IN INT32 Node,\r
+ OUT UINT64 *IoTranslation\r
+ )\r
+{\r
+ UINT32 RecordIdx;\r
+ CONST VOID *Prop;\r
+ UINT32 Len;\r
+ EFI_STATUS Status;\r
+ UINT64 IoBase;\r
+\r
+ //\r
+ // Iterate over "ranges".\r
+ //\r
+ Status = FdtClient->GetNodeProperty (FdtClient, Node, "ranges", &Prop, &Len);\r
+ if (EFI_ERROR (Status) || Len == 0 ||\r
+ Len % sizeof (DTB_PCI_HOST_RANGE_RECORD) != 0) {\r
+ DEBUG ((EFI_D_ERROR, "%a: 'ranges' not found or invalid\n", __FUNCTION__));\r
+ return RETURN_PROTOCOL_ERROR;\r
+ }\r
+\r
+ for (RecordIdx = 0; RecordIdx < Len / sizeof (DTB_PCI_HOST_RANGE_RECORD);\r
+ ++RecordIdx) {\r
+ CONST DTB_PCI_HOST_RANGE_RECORD *Record;\r
+ UINT32 Type;\r
+\r
+ Record = (CONST DTB_PCI_HOST_RANGE_RECORD *)Prop + RecordIdx;\r
+ Type = SwapBytes32 (Record->Type) & DTB_PCI_HOST_RANGE_TYPEMASK;\r
+ if (Type == DTB_PCI_HOST_RANGE_IO) {\r
+ IoBase = SwapBytes64 (Record->ChildBase);\r
+ *IoTranslation = SwapBytes64 (Record->CpuBase) - IoBase;\r
+\r
+ return RETURN_SUCCESS;\r
+ }\r
+ }\r
+ return RETURN_NOT_FOUND;\r
+}\r
+\r
RETURN_STATUS\r
EFIAPI\r
FdtPciPcdProducerLibConstructor (\r
UINT64 PciExpressBaseAddress;\r
FDT_CLIENT_PROTOCOL *FdtClient;\r
CONST UINT64 *Reg;\r
- UINT32 RegElemSize, RegSize;\r
+ UINT32 RegSize;\r
EFI_STATUS Status;\r
+ INT32 Node;\r
+ RETURN_STATUS RetStatus;\r
+ UINT64 IoTranslation;\r
\r
PciExpressBaseAddress = PcdGet64 (PcdPciExpressBaseAddress);\r
if (PciExpressBaseAddress != MAX_UINT64) {\r
+ //\r
+ // Assume that the fact that PciExpressBaseAddress has been changed from\r
+ // its default value of MAX_UINT64 implies that this code has been\r
+ // executed already, in the context of another module. That means we can\r
+ // assume that PcdPciIoTranslation has been discovered from the DT node\r
+ // as well.\r
+ //\r
return EFI_SUCCESS;\r
}\r
\r
(VOID **)&FdtClient);\r
ASSERT_EFI_ERROR (Status);\r
\r
- Status = FdtClient->FindCompatibleNodeReg (FdtClient,\r
- "pci-host-ecam-generic", (CONST VOID **)&Reg,\r
- &RegElemSize, &RegSize);\r
+ PciExpressBaseAddress = 0;\r
+ Status = FdtClient->FindCompatibleNode (FdtClient, "pci-host-ecam-generic",\r
+ &Node);\r
+\r
+ if (!EFI_ERROR (Status)) {\r
+ Status = FdtClient->GetNodeProperty (FdtClient, Node, "reg",\r
+ (CONST VOID **)&Reg, &RegSize);\r
+\r
+ if (!EFI_ERROR (Status) && RegSize == 2 * sizeof (UINT64)) {\r
+ PciExpressBaseAddress = SwapBytes64 (*Reg);\r
\r
- if (EFI_ERROR (Status)) {\r
- PciExpressBaseAddress = 0;\r
- } else {\r
- ASSERT (RegElemSize == sizeof (UINT64));\r
- PciExpressBaseAddress = SwapBytes64 (*Reg);\r
+ PcdSetBool (PcdPciDisableBusEnumeration, FALSE);\r
\r
- PcdSetBool (PcdPciDisableBusEnumeration, FALSE);\r
+ RetStatus = GetPciIoTranslation (FdtClient, Node, &IoTranslation);\r
+ if (!RETURN_ERROR (RetStatus)) {\r
+ PcdSet64 (PcdPciIoTranslation, IoTranslation);\r
+ } else {\r
+ //\r
+ // Support for I/O BARs is not mandatory, and so it does not make sense\r
+ // to abort in the general case. So leave it up to the actual driver to\r
+ // complain about this if it wants to, and just issue a warning here.\r
+ //\r
+ DEBUG ((EFI_D_WARN,\r
+ "%a: 'pci-host-ecam-generic' device encountered with no I/O range\n",\r
+ __FUNCTION__));\r
+ }\r
+ }\r
}\r
\r
PcdSet64 (PcdPciExpressBaseAddress, PciExpressBaseAddress);\r