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MdeModulePkg/PciHostBridge: Count the (mm)io overhead when polling

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RootBridgeIo.PollMem()/PollIo() originally don't count the IO/MMIO
access overhead when delaying.
The patch changes the implementation to count the access overhead
so that the actually delay equals to user required delay.

Contributed-under: TianoCore Contribution Agreement 1.1
Signed-off-by: Ruiyu Ni <ruiyu.ni@intel.com>
Reviewed-by: Star Zeng <star.zeng@intel.com>
Cc: Chasel Chiu <chasel.chiu@intel.com>
This commit is contained in:
Ruiyu Ni
2018-04-23 14:20:26 +08:00
parent b22a62be5c
commit 0edb7ec5ce
5 changed files with 114 additions and 54 deletions
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6
MdeModulePkg/Bus/Pci/PciHostBridgeDxe/PciHostBridge.c
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@@ -2,7 +2,7 @@
Provides the basic interfaces to abstract a PCI Host Bridge Resource Allocation.
Copyright (c) 1999 - 2017, Intel Corporation. All rights reserved.<BR>
Copyright (c) 1999 - 2018, 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
@@ -17,8 +17,6 @@ WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
#include "PciRootBridge.h"
#include "PciHostResource.h"
EFI_METRONOME_ARCH_PROTOCOL *mMetronome;
EFI_CPU_IO2_PROTOCOL *mCpuIo;
GLOBAL_REMOVE_IF_UNREFERENCED CHAR16 *mAcpiAddressSpaceTypeStr[] = {
@@ -406,8 +404,6 @@ InitializePciHostBridge (
return EFI_UNSUPPORTED;
}
Status = gBS->LocateProtocol (&gEfiMetronomeArchProtocolGuid, NULL, (VOID **) &mMetronome);
ASSERT_EFI_ERROR (Status);
Status = gBS->LocateProtocol (&gEfiCpuIo2ProtocolGuid, NULL, (VOID **) &mCpuIo);
ASSERT_EFI_ERROR (Status);