MdeModulePkg/PciBus: Revert "disable all BME when entering RT"

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

diff --git a/MdeModulePkg/Bus/Pci/PciBusDxe/PciDeviceSupport.c b/MdeModulePkg/Bus/Pci/PciBusDxe/PciDeviceSupport.c
index c0227fa2b69635bf3d440e714f52a63554df2867..97bb971a5966a2d869d8da42b47cb4e5be386f27 100644 (file)
--- a/MdeModulePkg/Bus/Pci/PciBusDxe/PciDeviceSupport.c
+++ b/MdeModulePkg/Bus/Pci/PciBusDxe/PciDeviceSupport.c
@@ -1,7 +1,7 @@
 /** @file\r
   Supporting functions implementaion for PCI devices management.\r
 \r
-Copyright (c) 2006 - 2015, Intel Corporation. All rights reserved.<BR>\r
+Copyright (c) 2006 - 2017, 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
@@ -282,7 +282,7 @@ RegisterPciDevice (
           PciIoDevice->BusNumber,\r
           PciIoDevice->DeviceNumber,\r
           PciIoDevice->FunctionNumber,\r
-          (UINT64) (UINTN) PciIoDevice->PciIo.RomImage,\r
+          PciIoDevice->PciIo.RomImage,\r
           PciIoDevice->PciIo.RomSize\r
           );\r
       }\r
@@ -308,7 +308,7 @@ RegisterPciDevice (
           PciIoDevice->BusNumber,\r
           PciIoDevice->DeviceNumber,\r
           PciIoDevice->FunctionNumber,\r
-          (UINT64) (UINTN) PciIoDevice->PciIo.RomImage,\r
+          PciIoDevice->PciIo.RomImage,\r
           PciIoDevice->PciIo.RomSize\r
           );\r
       }   \r
@@ -711,7 +711,12 @@ StartPciDevicesOnBridge (
                              0,\r
                              &Supports\r
                              );\r
-        Supports &= (UINT64)EFI_PCI_DEVICE_ENABLE;\r
+        //\r
+        // By default every bridge's IO and MMIO spaces are enabled.\r
+        // Bridge's Bus Master will be enabled when any device behind it requests\r
+        // to enable Bus Master.\r
+        //\r
+        Supports &= (UINT64) (EFI_PCI_IO_ATTRIBUTE_IO | EFI_PCI_IO_ATTRIBUTE_MEMORY);\r
         PciIoDevice->PciIo.Attributes (\r
                              &(PciIoDevice->PciIo),\r
                              EfiPciIoAttributeOperationEnable,\r
@@ -763,7 +768,12 @@ StartPciDevicesOnBridge (
                              0,\r
                              &Supports\r
                              );\r
-        Supports &= (UINT64)EFI_PCI_DEVICE_ENABLE;\r
+        //\r
+        // By default every bridge's IO and MMIO spaces are enabled.\r
+        // Bridge's Bus Master will be enabled when any device behind it requests\r
+        // to enable Bus Master.\r
+        //\r
+        Supports &= (UINT64) (EFI_PCI_IO_ATTRIBUTE_IO | EFI_PCI_IO_ATTRIBUTE_MEMORY);\r
         PciIoDevice->PciIo.Attributes (\r
                              &(PciIoDevice->PciIo),\r
                              EfiPciIoAttributeOperationEnable,\r