tyler.durden/audk
1
0
Fork 0
mirror of https://github.com/acidanthera/audk.git synced 2025-07-27 07:34:06 +02:00
Code Issues Packages Projects Releases Wiki Activity

MdeModulePkg/PciBus: Do not enable MemWriteAndInvalidate bit for PCIE

Browse Source 
Per PCIE spec, Memory Write and Invalidate is hardwired to 0b so
PciBus driver shouldn't write 1b to it.

Contributed-under: TianoCore Contribution Agreement 1.1
Signed-off-by: Ruiyu Ni <ruiyu.ni@intel.com>
Reviewed-by: Star Zeng <star.zeng@intel.com>
Reviewed-by: Chasel Chiu <chasel.chiu@intel.com>
This commit is contained in:
Ruiyu Ni 2018-05-25 17:57:37 +08:00
parent 2b5f0daa6c
commit d923365417
1 changed files with 6 additions and 4 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

10
MdeModulePkg/Bus/Pci/PciBusDxe/PciEnumeratorSupport.c
View File

@ -1,7 +1,7 @@
/** @file /** @file
PCI emumeration support functions implementation for PCI Bus module. PCI emumeration support functions implementation for PCI Bus module.
Copyright (c) 2006 - 2017, Intel Corporation. All rights reserved.<BR> Copyright (c) 2006 - 2018, Intel Corporation. All rights reserved.<BR>
(C) Copyright 2015 Hewlett Packard Enterprise Development LP<BR> (C) Copyright 2015 Hewlett Packard Enterprise Development LP<BR>
This program and the accompanying materials This program and the accompanying materials
are licensed and made available under the terms and conditions of the BSD License are licensed and made available under the terms and conditions of the BSD License
@ -1254,9 +1254,11 @@ DetermineDeviceAttribute (
PciSetDeviceAttribute (PciIoDevice, OldCommand, OldBridgeControl, EFI_SET_ATTRIBUTES); PciSetDeviceAttribute (PciIoDevice, OldCommand, OldBridgeControl, EFI_SET_ATTRIBUTES);
// //
// Enable other supported attributes but not defined in PCI_IO_PROTOCOL // Enable other PCI supported attributes but not defined in PCI_IO_PROTOCOL
// // For PCI Express devices, Memory Write and Invalidate is hardwired to 0b so only enable it for PCI devices.
PCI_ENABLE_COMMAND_REGISTER (PciIoDevice, EFI_PCI_COMMAND_MEMORY_WRITE_AND_INVALIDATE); if (!PciIoDevice->IsPciExp) {
PCI_ENABLE_COMMAND_REGISTER (PciIoDevice, EFI_PCI_COMMAND_MEMORY_WRITE_AND_INVALIDATE);
}
} }
FastB2BSupport = TRUE; FastB2BSupport = TRUE;