Clean ISA_IO/ISA_IO_16 and VGA_IO/VGA_IO_16 attribute usage in PCI bus driver/PCI host bridge drivers/LPC/VGA device drivers.

1. Fix the incorrect definition of EFI_PCI_IO_ATTRIBUTE_VGA_IO_16 (does not conform to the UEFI spec) in PciIo.h.
2. Add missing definitions of ISA and VGA IO attributes in PCI Root Bridge IO protocol.
3. Improve the algorithm in the PCI bus driver to get PCI platform policy from PCI Platform Protocol and PCI Override Protocol.
4. Update the PCI bus driver to use the PCI platform policy to determine the supported attributes that are returned by the EFI_PCI_IO_PROTOCOL.Attributes() function. This is required by the PI spec.
5. Add a backward compatibility workaround for PCI VGA drivers in Option ROM, which typically sets VGA_IO without checking supported attributes.
6. Update the PCI host bridge driver in PcAtChipsetPkg to report VGA_IO_16 and ISA_IO_16 instead of VGA_IO/ISA_IO attributes. Modern chipsets don’t have hardware capability to control 10-bit or 16-bit decoding for ISA/VGA aliases.
7. Update LPC/VGA device drivers to check supported attributes of VGA_IO/VGA_IO_16 or ISA_IO/ISA_IO_16.

git-svn-id: https://edk2.svn.sourceforge.net/svnroot/edk2/trunk/edk2@11204 6f19259b-4bc3-4df7-8a09-765794883524

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;

   }