Change PciIo::GetBarAttributes() to return unsupported for a unsupported bar even...

[mirror_edk2.git] / MdeModulePkg / Bus / Pci / PciBusDxe / PciIo.c

diff --git a/MdeModulePkg/Bus/Pci/PciBusDxe/PciIo.c b/MdeModulePkg/Bus/Pci/PciBusDxe/PciIo.c
index 12f6997ac586cf86aecae7efb15fba6fe52fb567..2893f44d53c059384cfd2af3a3bbdd0768a3679f 100644 (file)
--- a/MdeModulePkg/Bus/Pci/PciBusDxe/PciIo.c
+++ b/MdeModulePkg/Bus/Pci/PciBusDxe/PciIo.c
@@ -1,7 +1,7 @@
 /** @file\r
   EFI PCI IO protocol functions implementation for PCI Bus module.\r
 \r
-Copyright (c) 2006 - 2012, Intel Corporation. All rights reserved.<BR>\r
+Copyright (c) 2006 - 2014, Intel Corporation. All rights reserved.<BR>\r
 This program and the accompanying materials\r
 are licensed and made available under the terms and conditions of the BSD License\r
 which accompanies this distribution.  The full text of the license may be found at\r
@@ -1779,14 +1779,10 @@ PciIoGetBarAttributes (
   OUT VOID                           **Resources OPTIONAL\r
   )\r
 {\r
-\r
   UINT8                             *Configuration;\r
-  UINT8                             NumConfig;\r
   PCI_IO_DEVICE                     *PciIoDevice;\r
-  EFI_ACPI_ADDRESS_SPACE_DESCRIPTOR *Ptr;\r
-  EFI_ACPI_END_TAG_DESCRIPTOR       *PtrEnd;\r
-\r
-  NumConfig   = 0;\r
+  EFI_ACPI_ADDRESS_SPACE_DESCRIPTOR *AddressSpace;\r
+  EFI_ACPI_END_TAG_DESCRIPTOR       *End;\r
 \r
   PciIoDevice = PCI_IO_DEVICE_FROM_PCI_IO_THIS (This);\r
 \r
@@ -1794,7 +1790,7 @@ PciIoGetBarAttributes (
     return EFI_INVALID_PARAMETER;\r
   }\r
 \r
-  if (BarIndex >= PCI_MAX_BAR) {\r
+  if ((BarIndex >= PCI_MAX_BAR) || (PciIoDevice->PciBar[BarIndex].BarType == PciBarTypeUnknown)) {\r
     return EFI_UNSUPPORTED;\r
   }\r
 \r
@@ -1807,102 +1803,93 @@ PciIoGetBarAttributes (
   }\r
 \r
   if (Resources != NULL) {\r
-\r
-    if (PciIoDevice->PciBar[BarIndex].BarType != PciBarTypeUnknown) {\r
-      NumConfig = 1;\r
-    }\r
-\r
-    Configuration = AllocateZeroPool (sizeof (EFI_ACPI_ADDRESS_SPACE_DESCRIPTOR) * NumConfig + sizeof (EFI_ACPI_END_TAG_DESCRIPTOR));\r
+    Configuration = AllocateZeroPool (sizeof (EFI_ACPI_ADDRESS_SPACE_DESCRIPTOR) + sizeof (EFI_ACPI_END_TAG_DESCRIPTOR));\r
     if (Configuration == NULL) {\r
       return EFI_OUT_OF_RESOURCES;\r
     }\r
 \r
-    Ptr = (EFI_ACPI_ADDRESS_SPACE_DESCRIPTOR *) Configuration;\r
+    AddressSpace = (EFI_ACPI_ADDRESS_SPACE_DESCRIPTOR *) Configuration;\r
 \r
-    if (NumConfig == 1) {\r
-      Ptr->Desc         = ACPI_ADDRESS_SPACE_DESCRIPTOR;\r
-      Ptr->Len          = (UINT16) (sizeof (EFI_ACPI_ADDRESS_SPACE_DESCRIPTOR) - 3);\r
+    AddressSpace->Desc         = ACPI_ADDRESS_SPACE_DESCRIPTOR;\r
+    AddressSpace->Len          = (UINT16) (sizeof (EFI_ACPI_ADDRESS_SPACE_DESCRIPTOR) - 3);\r
 \r
-      Ptr->AddrRangeMin = PciIoDevice->PciBar[BarIndex].BaseAddress;\r
-      Ptr->AddrLen      = PciIoDevice->PciBar[BarIndex].Length;\r
-      Ptr->AddrRangeMax = PciIoDevice->PciBar[BarIndex].Alignment;\r
+    AddressSpace->AddrRangeMin = PciIoDevice->PciBar[BarIndex].BaseAddress;\r
+    AddressSpace->AddrLen      = PciIoDevice->PciBar[BarIndex].Length;\r
+    AddressSpace->AddrRangeMax = PciIoDevice->PciBar[BarIndex].Alignment;\r
 \r
-      switch (PciIoDevice->PciBar[BarIndex].BarType) {\r
-      case PciBarTypeIo16:\r
-      case PciBarTypeIo32:\r
-        //\r
-        // Io\r
-        //\r
-        Ptr->ResType = ACPI_ADDRESS_SPACE_TYPE_IO;\r
-        break;\r
-\r
-      case PciBarTypeMem32:\r
-        //\r
-        // Mem\r
-        //\r
-        Ptr->ResType = ACPI_ADDRESS_SPACE_TYPE_MEM;\r
-        //\r
-        // 32 bit\r
-        //\r
-        Ptr->AddrSpaceGranularity = 32;\r
-        break;\r
+    switch (PciIoDevice->PciBar[BarIndex].BarType) {\r
+    case PciBarTypeIo16:\r
+    case PciBarTypeIo32:\r
+      //\r
+      // Io\r
+      //\r
+      AddressSpace->ResType = ACPI_ADDRESS_SPACE_TYPE_IO;\r
+      break;\r
 \r
-      case PciBarTypePMem32:\r
-        //\r
-        // Mem\r
-        //\r
-        Ptr->ResType = ACPI_ADDRESS_SPACE_TYPE_MEM;\r
-        //\r
-        // prefechable\r
-        //\r
-        Ptr->SpecificFlag = 0x6;\r
-        //\r
-        // 32 bit\r
-        //\r
-        Ptr->AddrSpaceGranularity = 32;\r
-        break;\r
+    case PciBarTypeMem32:\r
+      //\r
+      // Mem\r
+      //\r
+      AddressSpace->ResType = ACPI_ADDRESS_SPACE_TYPE_MEM;\r
+      //\r
+      // 32 bit\r
+      //\r
+      AddressSpace->AddrSpaceGranularity = 32;\r
+      break;\r
 \r
-      case PciBarTypeMem64:\r
-        //\r
-        // Mem\r
-        //\r
-        Ptr->ResType = ACPI_ADDRESS_SPACE_TYPE_MEM;\r
-        //\r
-        // 64 bit\r
-        //\r
-        Ptr->AddrSpaceGranularity = 64;\r
-        break;\r
+    case PciBarTypePMem32:\r
+      //\r
+      // Mem\r
+      //\r
+      AddressSpace->ResType = ACPI_ADDRESS_SPACE_TYPE_MEM;\r
+      //\r
+      // prefechable\r
+      //\r
+      AddressSpace->SpecificFlag = 0x6;\r
+      //\r
+      // 32 bit\r
+      //\r
+      AddressSpace->AddrSpaceGranularity = 32;\r
+      break;\r
 \r
-      case PciBarTypePMem64:\r
-        //\r
-        // Mem\r
-        //\r
-        Ptr->ResType = ACPI_ADDRESS_SPACE_TYPE_MEM;\r
-        //\r
-        // prefechable\r
-        //\r
-        Ptr->SpecificFlag = 0x6;\r
-        //\r
-        // 64 bit\r
-        //\r
-        Ptr->AddrSpaceGranularity = 64;\r
-        break;\r
+    case PciBarTypeMem64:\r
+      //\r
+      // Mem\r
+      //\r
+      AddressSpace->ResType = ACPI_ADDRESS_SPACE_TYPE_MEM;\r
+      //\r
+      // 64 bit\r
+      //\r
+      AddressSpace->AddrSpaceGranularity = 64;\r
+      break;\r
 \r
-      default:\r
-        break;\r
-      }\r
+    case PciBarTypePMem64:\r
+      //\r
+      // Mem\r
+      //\r
+      AddressSpace->ResType = ACPI_ADDRESS_SPACE_TYPE_MEM;\r
+      //\r
+      // prefechable\r
+      //\r
+      AddressSpace->SpecificFlag = 0x6;\r
+      //\r
+      // 64 bit\r
+      //\r
+      AddressSpace->AddrSpaceGranularity = 64;\r
+      break;\r
 \r
-      Ptr = (EFI_ACPI_ADDRESS_SPACE_DESCRIPTOR *) ((UINT8 *) Ptr + sizeof (EFI_ACPI_ADDRESS_SPACE_DESCRIPTOR));\r
+    default:\r
+      break;\r
     }\r
 \r
     //\r
     // put the checksum\r
     //\r
-    PtrEnd            = (EFI_ACPI_END_TAG_DESCRIPTOR *) ((UINT8 *) Ptr);\r
-    PtrEnd->Desc      = ACPI_END_TAG_DESCRIPTOR;\r
-    PtrEnd->Checksum  = 0;\r
+    End           = (EFI_ACPI_END_TAG_DESCRIPTOR *) (AddressSpace + 1);\r
+    End->Desc     = ACPI_END_TAG_DESCRIPTOR;\r
+    End->Checksum = 0;\r
 \r
-    *Resources        = Configuration;\r
+    *Resources    = Configuration;\r
   }\r
 \r
   return EFI_SUCCESS;\r