diff options
Diffstat (limited to 'OptionRomPkg/CirrusLogic5430Dxe/CirrusLogic5430.c')
| -rw-r--r-- | OptionRomPkg/CirrusLogic5430Dxe/CirrusLogic5430.c | 32 |
1 files changed, 26 insertions, 6 deletions
diff --git a/OptionRomPkg/CirrusLogic5430Dxe/CirrusLogic5430.c b/OptionRomPkg/CirrusLogic5430Dxe/CirrusLogic5430.c index d5ea4e294d..8b6dfac1fe 100644 --- a/OptionRomPkg/CirrusLogic5430Dxe/CirrusLogic5430.c +++ b/OptionRomPkg/CirrusLogic5430Dxe/CirrusLogic5430.c @@ -11,7 +11,7 @@ documentation on UGA for details on how to write a UGA driver that is able
to function both in the EFI pre-boot environment and from the OS runtime.
- Copyright (c) 2006 - 2009, Intel Corporation. All rights reserved.<BR>
+ Copyright (c) 2006 - 2010, Intel Corporation. All rights reserved.<BR>
This program and the accompanying materials
are licensed and made available under the terms and conditions of the BSD License
which accompanies this distribution. The full text of the license may be found at
@@ -233,6 +233,7 @@ CirrusLogic5430ControllerDriverStart ( BOOLEAN PciAttributesSaved;
EFI_DEVICE_PATH_PROTOCOL *ParentDevicePath;
ACPI_ADR_DEVICE_PATH AcpiDeviceNode;
+ UINT64 Supports;
PciAttributesSaved = FALSE;
//
@@ -266,6 +267,25 @@ CirrusLogic5430ControllerDriverStart ( }
//
+ // Get supported PCI attributes
+ //
+ Status = Private->PciIo->Attributes (
+ Private->PciIo,
+ EfiPciIoAttributeOperationSupported,
+ 0,
+ &Supports
+ );
+ if (EFI_ERROR (Status)) {
+ goto Error;
+ }
+
+ Supports &= (EFI_PCI_IO_ATTRIBUTE_VGA_IO | EFI_PCI_IO_ATTRIBUTE_VGA_IO_16);
+ if (Supports == 0 || Supports == (EFI_PCI_IO_ATTRIBUTE_VGA_IO | EFI_PCI_IO_ATTRIBUTE_VGA_IO_16)) {
+ Status = EFI_UNSUPPORTED;
+ goto Error;
+ }
+
+ //
// Save original PCI attributes
//
Status = Private->PciIo->Attributes (
@@ -281,11 +301,11 @@ CirrusLogic5430ControllerDriverStart ( PciAttributesSaved = TRUE;
Status = Private->PciIo->Attributes (
- Private->PciIo,
- EfiPciIoAttributeOperationEnable,
- EFI_PCI_DEVICE_ENABLE | EFI_PCI_IO_ATTRIBUTE_VGA_MEMORY | EFI_PCI_IO_ATTRIBUTE_VGA_IO,
- NULL
- );
+ Private->PciIo,
+ EfiPciIoAttributeOperationEnable,
+ EFI_PCI_DEVICE_ENABLE | EFI_PCI_IO_ATTRIBUTE_VGA_MEMORY | Supports,
+ NULL
+ );
if (EFI_ERROR (Status)) {
goto Error;
}
|