mirror of
https://github.com/CloverHackyColor/CloverBootloader.git
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850 lines
21 KiB
C
850 lines
21 KiB
C
/** @file
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The XHCI register operation routines.
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Copyright (c) 2011 - 2017, Intel Corporation. All rights reserved.<BR>
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This program and the accompanying materials
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are licensed and made available under the terms and conditions of the BSD License
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which accompanies this distribution. The full text of the license may be found at
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http://opensource.org/licenses/bsd-license.php
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THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
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WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
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**/
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#include "Xhci.h"
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/**
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Read 1-byte width XHCI capability register.
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@param Xhc The XHCI Instance.
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@param Offset The offset of the 1-byte width capability register.
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@return The register content read.
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@retval If err, return 0xFF.
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**/
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UINT8
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XhcReadCapReg8 (
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IN USB_XHCI_INSTANCE *Xhc,
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IN UINT32 Offset
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)
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{
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UINT8 Data;
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EFI_STATUS Status;
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Status = Xhc->PciIo->Mem.Read (
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Xhc->PciIo,
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EfiPciIoWidthUint8,
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XHC_BAR_INDEX,
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(UINT64) Offset,
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1,
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&Data
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);
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if (EFI_ERROR (Status)) {
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DEBUG ((EFI_D_ERROR, "XhcReadCapReg: Pci Io read error - %r at %d\n", Status, Offset));
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Data = 0xFF;
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}
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return Data;
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}
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/**
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Read 4-bytes width XHCI capability register.
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@param Xhc The XHCI Instance.
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@param Offset The offset of the 4-bytes width capability register.
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@return The register content read.
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@retval If err, return 0xFFFFFFFF.
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**/
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UINT32
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XhcReadCapReg (
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IN USB_XHCI_INSTANCE *Xhc,
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IN UINT32 Offset
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)
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{
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UINT32 Data;
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EFI_STATUS Status;
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Status = Xhc->PciIo->Mem.Read (
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Xhc->PciIo,
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EfiPciIoWidthUint32,
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XHC_BAR_INDEX,
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(UINT64) Offset,
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1,
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&Data
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);
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if (EFI_ERROR (Status)) {
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DEBUG ((EFI_D_ERROR, "XhcReadCapReg: Pci Io read error - %r at %d\n", Status, Offset));
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Data = 0xFFFFFFFF;
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}
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return Data;
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}
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/**
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Read 4-bytes width XHCI Operational register.
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@param Xhc The XHCI Instance.
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@param Offset The offset of the 4-bytes width operational register.
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@return The register content read.
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@retval If err, return 0xFFFFFFFF.
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**/
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UINT32
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XhcReadOpReg (
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IN USB_XHCI_INSTANCE *Xhc,
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IN UINT32 Offset
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)
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{
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UINT32 Data;
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EFI_STATUS Status;
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// ASSERT (Xhc->CapLength != 0);
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if (!Xhc->CapLength) {
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return 0xFFFFFFFF;
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}
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Status = Xhc->PciIo->Mem.Read (
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Xhc->PciIo,
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EfiPciIoWidthUint32,
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XHC_BAR_INDEX,
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(UINT64) (Xhc->CapLength + Offset),
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1,
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&Data
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);
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if (EFI_ERROR (Status)) {
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DEBUG ((EFI_D_ERROR, "XhcReadOpReg: Pci Io Read error - %r at %d\n", Status, Offset));
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Data = 0xFFFFFFFF;
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}
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return Data;
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}
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/**
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Write the data to the 4-bytes width XHCI operational register.
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@param Xhc The XHCI Instance.
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@param Offset The offset of the 4-bytes width operational register.
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@param Data The data to write.
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**/
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VOID
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XhcWriteOpReg (
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IN USB_XHCI_INSTANCE *Xhc,
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IN UINT32 Offset,
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IN UINT32 Data
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)
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{
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EFI_STATUS Status;
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// ASSERT (Xhc->CapLength != 0);
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if (!Xhc->CapLength) {
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return;
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}
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Status = Xhc->PciIo->Mem.Write (
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Xhc->PciIo,
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EfiPciIoWidthUint32,
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XHC_BAR_INDEX,
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(UINT64) (Xhc->CapLength + Offset),
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1,
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&Data
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);
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if (EFI_ERROR (Status)) {
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DEBUG ((EFI_D_ERROR, "XhcWriteOpReg: Pci Io Write error: %r at %d\n", Status, Offset));
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}
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}
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/**
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Write the data to the 2-bytes width XHCI operational register.
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@param Xhc The XHCI Instance.
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@param Offset The offset of the 2-bytes width operational register.
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@param Data The data to write.
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**/
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VOID
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XhcWriteOpReg16 (
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IN USB_XHCI_INSTANCE *Xhc,
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IN UINT32 Offset,
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IN UINT16 Data
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)
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{
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EFI_STATUS Status;
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// ASSERT (Xhc->CapLength != 0);
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if (!Xhc->CapLength) {
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return;
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}
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Status = Xhc->PciIo->Mem.Write (
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Xhc->PciIo,
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EfiPciIoWidthUint16,
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XHC_BAR_INDEX,
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(UINT64) (Xhc->CapLength + Offset),
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1,
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&Data
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);
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if (EFI_ERROR (Status)) {
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DEBUG ((EFI_D_ERROR, "XhcWriteOpReg16: Pci Io Write error: %r at %d\n", Status, Offset));
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}
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}
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/**
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Read XHCI door bell register.
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@param Xhc The XHCI Instance.
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@param Offset The offset of the door bell register.
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@return The register content read
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**/
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UINT32
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XhcReadDoorBellReg (
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IN USB_XHCI_INSTANCE *Xhc,
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IN UINT32 Offset
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)
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{
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UINT32 Data;
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EFI_STATUS Status;
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// ASSERT (Xhc->DBOff != 0);
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if (!Xhc->DBOff) {
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return 0xFFFFFFFF;
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}
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Status = Xhc->PciIo->Mem.Read (
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Xhc->PciIo,
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EfiPciIoWidthUint32,
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XHC_BAR_INDEX,
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(UINT64) (Xhc->DBOff + Offset),
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1,
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&Data
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);
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if (EFI_ERROR (Status)) {
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DEBUG ((EFI_D_ERROR, "XhcReadDoorBellReg: Pci Io Read error - %r at %d\n", Status, Offset));
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Data = 0xFFFFFFFF;
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}
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return Data;
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}
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/**
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Write the data to the XHCI door bell register.
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@param Xhc The XHCI Instance.
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@param Offset The offset of the door bell register.
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@param Data The data to write.
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**/
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VOID
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XhcWriteDoorBellReg (
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IN USB_XHCI_INSTANCE *Xhc,
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IN UINT32 Offset,
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IN UINT32 Data
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)
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{
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EFI_STATUS Status;
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// ASSERT (Xhc->DBOff != 0);
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if (!Xhc->DBOff) {
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return;
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}
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Status = Xhc->PciIo->Mem.Write (
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Xhc->PciIo,
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EfiPciIoWidthUint32,
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XHC_BAR_INDEX,
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(UINT64) (Xhc->DBOff + Offset),
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1,
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&Data
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);
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if (EFI_ERROR (Status)) {
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DEBUG ((EFI_D_ERROR, "XhcWriteOpReg: Pci Io Write error: %r at %d\n", Status, Offset));
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}
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}
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/**
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Read XHCI runtime register.
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@param Xhc The XHCI Instance.
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@param Offset The offset of the runtime register.
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@return The register content read
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**/
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UINT32
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XhcReadRuntimeReg (
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IN USB_XHCI_INSTANCE *Xhc,
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IN UINT32 Offset
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)
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{
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UINT32 Data;
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EFI_STATUS Status;
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// ASSERT (Xhc->RTSOff != 0);
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if (!Xhc->RTSOff) {
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return 0xFFFFFFFF;
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}
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Status = Xhc->PciIo->Mem.Read (
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Xhc->PciIo,
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EfiPciIoWidthUint32,
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XHC_BAR_INDEX,
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(UINT64) (Xhc->RTSOff + Offset),
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1,
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&Data
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);
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if (EFI_ERROR (Status)) {
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DEBUG ((EFI_D_ERROR, "XhcReadRuntimeReg: Pci Io Read error - %r at %d\n", Status, Offset));
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Data = 0xFFFFFFFF;
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}
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return Data;
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}
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/**
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Write the data to the XHCI runtime register.
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@param Xhc The XHCI Instance.
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@param Offset The offset of the runtime register.
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@param Data The data to write.
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**/
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VOID
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XhcWriteRuntimeReg (
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IN USB_XHCI_INSTANCE *Xhc,
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IN UINT32 Offset,
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IN UINT32 Data
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)
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{
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EFI_STATUS Status;
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// ASSERT (Xhc->RTSOff != 0);
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if (!Xhc->RTSOff) {
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return;
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}
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Status = Xhc->PciIo->Mem.Write (
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Xhc->PciIo,
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EfiPciIoWidthUint32,
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XHC_BAR_INDEX,
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(UINT64) (Xhc->RTSOff + Offset),
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1,
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&Data
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);
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if (EFI_ERROR (Status)) {
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DEBUG ((EFI_D_ERROR, "XhcWriteRuntimeReg: Pci Io Write error: %r at %d\n", Status, Offset));
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}
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}
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/**
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Read XHCI extended capability register.
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@param Xhc The XHCI Instance.
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@param Offset The offset of the extended capability register.
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@return The register content read
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**/
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UINT32
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XhcReadExtCapReg (
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IN USB_XHCI_INSTANCE *Xhc,
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IN UINT32 Offset
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)
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{
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UINT32 Data;
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EFI_STATUS Status;
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// ASSERT (Xhc->ExtCapRegBase != 0);
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if (!Xhc->ExtCapRegBase) {
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return 0xFFFFFFFF;
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}
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Status = Xhc->PciIo->Mem.Read (
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Xhc->PciIo,
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EfiPciIoWidthUint32,
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XHC_BAR_INDEX,
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(UINT64) (Xhc->ExtCapRegBase + Offset),
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1,
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&Data
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);
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if (EFI_ERROR (Status)) {
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DEBUG ((EFI_D_ERROR, "XhcReadExtCapReg: Pci Io Read error - %r at %d\n", Status, Offset));
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Data = 0xFFFFFFFF;
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}
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return Data;
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}
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/**
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Write the data to the XHCI extended capability register.
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@param Xhc The XHCI Instance.
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@param Offset The offset of the extended capability register.
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@param Data The data to write.
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**/
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VOID
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XhcWriteExtCapReg (
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IN USB_XHCI_INSTANCE *Xhc,
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IN UINT32 Offset,
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IN UINT32 Data
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)
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{
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EFI_STATUS Status;
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// ASSERT (Xhc->ExtCapRegBase != 0);
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if (!Xhc->ExtCapRegBase) {
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return;
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}
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Status = Xhc->PciIo->Mem.Write (
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Xhc->PciIo,
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EfiPciIoWidthUint32,
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XHC_BAR_INDEX,
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(UINT64) (Xhc->ExtCapRegBase + Offset),
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1,
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&Data
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);
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if (EFI_ERROR (Status)) {
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DEBUG ((EFI_D_ERROR, "XhcWriteExtCapReg: Pci Io Write error: %r at %d\n", Status, Offset));
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}
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}
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/**
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Set one bit of the runtime register while keeping other bits.
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@param Xhc The XHCI Instance.
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@param Offset The offset of the runtime register.
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@param Bit The bit mask of the register to set.
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**/
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VOID
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XhcSetRuntimeRegBit (
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IN USB_XHCI_INSTANCE *Xhc,
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IN UINT32 Offset,
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IN UINT32 Bit
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)
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{
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UINT32 Data;
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Data = XhcReadRuntimeReg (Xhc, Offset);
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Data |= Bit;
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XhcWriteRuntimeReg (Xhc, Offset, Data);
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}
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/**
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Clear one bit of the runtime register while keeping other bits.
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@param Xhc The XHCI Instance.
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@param Offset The offset of the runtime register.
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@param Bit The bit mask of the register to set.
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**/
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VOID
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XhcClearRuntimeRegBit (
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IN USB_XHCI_INSTANCE *Xhc,
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IN UINT32 Offset,
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IN UINT32 Bit
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)
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{
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UINT32 Data;
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Data = XhcReadRuntimeReg (Xhc, Offset);
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Data &= ~Bit;
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XhcWriteRuntimeReg (Xhc, Offset, Data);
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}
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/**
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Set one bit of the operational register while keeping other bits.
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@param Xhc The XHCI Instance.
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@param Offset The offset of the operational register.
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@param Bit The bit mask of the register to set.
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**/
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VOID
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XhcSetOpRegBit (
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IN USB_XHCI_INSTANCE *Xhc,
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IN UINT32 Offset,
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IN UINT32 Bit
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)
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{
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UINT32 Data;
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Data = XhcReadOpReg (Xhc, Offset);
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if (Data == 0xFFFFFFFF) {
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return;
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}
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Data |= Bit;
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XhcWriteOpReg (Xhc, Offset, Data);
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}
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/**
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Clear one bit of the operational register while keeping other bits.
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@param Xhc The XHCI Instance.
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@param Offset The offset of the operational register.
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@param Bit The bit mask of the register to clear.
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**/
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VOID
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XhcClearOpRegBit (
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IN USB_XHCI_INSTANCE *Xhc,
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IN UINT32 Offset,
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IN UINT32 Bit
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)
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{
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UINT32 Data;
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Data = XhcReadOpReg (Xhc, Offset);
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if (Data == 0xFFFFFFFF) {
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return;
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}
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Data &= ~Bit;
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XhcWriteOpReg (Xhc, Offset, Data);
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}
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/**
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Wait the operation register's bit as specified by Bit
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to become set (or clear).
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@param Xhc The XHCI Instance.
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@param Offset The offset of the operation register.
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@param Bit The bit of the register to wait for.
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@param WaitToSet Wait the bit to set or clear.
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@param Timeout The time to wait before abort (in millisecond, ms).
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@retval EFI_SUCCESS The bit successfully changed by host controller.
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@retval EFI_TIMEOUT The time out occurred.
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**/
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EFI_STATUS
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XhcWaitOpRegBit (
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IN USB_XHCI_INSTANCE *Xhc,
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IN UINT32 Offset,
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IN UINT32 Bit,
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IN BOOLEAN WaitToSet,
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IN UINT32 Timeout
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)
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{
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UINT32 Index;
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UINT64 Loop;
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Loop = Timeout * XHC_1_MILLISECOND;
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for (Index = 0; Index < Loop; Index++) {
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if (XHC_REG_BIT_IS_SET (Xhc, Offset, Bit) == WaitToSet) {
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return EFI_SUCCESS;
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}
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gBS->Stall (XHC_1_MICROSECOND);
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}
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return EFI_TIMEOUT;
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}
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/**
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Set Bios Ownership
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@param Xhc The XHCI Instance.
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**/
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VOID
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XhcSetBiosOwnership (
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IN USB_XHCI_INSTANCE *Xhc
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)
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{
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UINT32 Buffer;
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INT32 TimeOut;
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if (!Xhc || (Xhc->UsbLegSupOffset == 0xFFFFFFFF)) {
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return;
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}
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// DEBUG ((EFI_D_INFO, "XhcSetBiosOwnership: called to set BIOS ownership\n"));
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// free from previous owner
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Buffer = XhcReadExtCapReg (Xhc, Xhc->UsbLegSupOffset);
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if (Buffer & USBLEGSP_BIOS_SEMAPHORE) {
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Buffer |= USBLEGSP_OS_SEMAPHORE;
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XhcWriteExtCapReg (Xhc, Xhc->UsbLegSupOffset, Buffer);
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TimeOut = 40;
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while (TimeOut--) {
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gBS->Stall(500);
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Buffer = XhcReadExtCapReg (Xhc, Xhc->UsbLegSupOffset);
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if ((Buffer & USBLEGSP_BIOS_SEMAPHORE) == 0) {
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break; // previous owner exit
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}
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}
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}
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Buffer = XhcReadExtCapReg (Xhc, Xhc->UsbLegSupOffset + 4);
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//
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// Disable all SMI in USBLEGCTLSTS
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//
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Buffer &= 0x1F1FEEU;
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Buffer |= 0xE0000000U;
|
|
XhcWriteExtCapReg (Xhc, Xhc->UsbLegSupOffset + 4, Buffer);
|
|
|
|
// now clear all ownership
|
|
Buffer = XhcReadExtCapReg (Xhc, Xhc->UsbLegSupOffset);
|
|
Buffer &= ~(USBLEGSP_OS_SEMAPHORE | USBLEGSP_BIOS_SEMAPHORE);
|
|
XhcWriteExtCapReg (Xhc, Xhc->UsbLegSupOffset, Buffer);
|
|
}
|
|
|
|
/**
|
|
Clear Bios Ownership
|
|
|
|
@param Xhc The XHCI Instance.
|
|
|
|
**/
|
|
VOID
|
|
XhcClearBiosOwnership (
|
|
IN USB_XHCI_INSTANCE *Xhc
|
|
)
|
|
{
|
|
UINT32 Buffer;
|
|
|
|
if (!Xhc || (Xhc->UsbLegSupOffset == 0xFFFFFFFF)) {
|
|
return;
|
|
}
|
|
|
|
// DEBUG ((EFI_D_INFO, "XhcClearBiosOwnership: called to clear BIOS ownership\n"));
|
|
|
|
Buffer = XhcReadExtCapReg (Xhc, Xhc->UsbLegSupOffset);
|
|
Buffer = ((Buffer & (~USBLEGSP_BIOS_SEMAPHORE)) | USBLEGSP_OS_SEMAPHORE);
|
|
XhcWriteExtCapReg (Xhc, Xhc->UsbLegSupOffset, Buffer);
|
|
}
|
|
|
|
/**
|
|
Calculate the offset of the XHCI capability.
|
|
|
|
@param Xhc The XHCI Instance.
|
|
@param CapId The XHCI Capability ID.
|
|
|
|
@return The offset of XHCI legacy support capability register.
|
|
|
|
**/
|
|
UINT32
|
|
XhcGetCapabilityAddr (
|
|
IN USB_XHCI_INSTANCE *Xhc,
|
|
IN UINT8 CapId
|
|
)
|
|
{
|
|
UINT32 ExtCapOffset;
|
|
UINT8 NextExtCapReg;
|
|
UINT32 Data;
|
|
|
|
ExtCapOffset = 0;
|
|
|
|
do {
|
|
//
|
|
// Check if the extended capability register's capability id is USB Legacy Support.
|
|
//
|
|
Data = XhcReadExtCapReg (Xhc, ExtCapOffset);
|
|
if ((Data & 0xFF) == CapId) {
|
|
return ExtCapOffset;
|
|
}
|
|
//
|
|
// If not, then traverse all of the ext capability registers till finding out it.
|
|
//
|
|
NextExtCapReg = (UINT8)((Data >> 8) & 0xFF);
|
|
ExtCapOffset += (NextExtCapReg << 2);
|
|
} while (NextExtCapReg != 0);
|
|
|
|
return 0xFFFFFFFF;
|
|
}
|
|
|
|
/**
|
|
Whether the XHCI host controller is halted.
|
|
|
|
@param Xhc The XHCI Instance.
|
|
|
|
@retval TRUE The controller is halted.
|
|
@retval FALSE It isn't halted.
|
|
|
|
**/
|
|
BOOLEAN
|
|
XhcIsHalt (
|
|
IN USB_XHCI_INSTANCE *Xhc
|
|
)
|
|
{
|
|
return XHC_REG_BIT_IS_SET (Xhc, XHC_USBSTS_OFFSET, XHC_USBSTS_HALT);
|
|
}
|
|
|
|
|
|
/**
|
|
Whether system error occurred.
|
|
|
|
@param Xhc The XHCI Instance.
|
|
|
|
@retval TRUE System error happened.
|
|
@retval FALSE No system error.
|
|
|
|
**/
|
|
BOOLEAN
|
|
XhcIsSysError (
|
|
IN USB_XHCI_INSTANCE *Xhc
|
|
)
|
|
{
|
|
return XHC_REG_BIT_IS_SET (Xhc, XHC_USBSTS_OFFSET, XHC_USBSTS_HSE);
|
|
}
|
|
|
|
/**
|
|
Reset the XHCI host controller.
|
|
|
|
@param Xhc The XHCI Instance.
|
|
@param Timeout Time to wait before abort (in millisecond, ms).
|
|
|
|
@retval EFI_SUCCESS The XHCI host controller is reset.
|
|
@return Others Failed to reset the XHCI before Timeout.
|
|
|
|
**/
|
|
EFI_STATUS
|
|
XhcResetHC (
|
|
IN USB_XHCI_INSTANCE *Xhc,
|
|
IN UINT32 Timeout
|
|
)
|
|
{
|
|
EFI_STATUS Status;
|
|
|
|
Status = EFI_SUCCESS;
|
|
|
|
DEBUG ((EFI_D_INFO, "XhcResetHC!\n"));
|
|
//
|
|
// Host can only be reset when it is halt. If not so, halt it
|
|
//
|
|
if (!XHC_REG_BIT_IS_SET (Xhc, XHC_USBSTS_OFFSET, XHC_USBSTS_HALT)) {
|
|
Status = XhcHaltHC (Xhc, Timeout);
|
|
|
|
if (EFI_ERROR (Status)) {
|
|
return Status;
|
|
}
|
|
}
|
|
|
|
if ((Xhc->DebugCapSupOffset == 0xFFFFFFFF) || ((XhcReadExtCapReg (Xhc, Xhc->DebugCapSupOffset) & 0xFF) != XHC_CAP_USB_DEBUG) ||
|
|
((XhcReadExtCapReg (Xhc, Xhc->DebugCapSupOffset + XHC_DC_DCCTRL) & BIT0) == 0)) {
|
|
XhcSetOpRegBit (Xhc, XHC_USBCMD_OFFSET, XHC_USBCMD_RESET);
|
|
//
|
|
// Some XHCI host controllers require to have extra 1ms delay before accessing any MMIO register during reset.
|
|
// Otherwise there may have the timeout case happened.
|
|
// The below is a workaround to solve such problem.
|
|
//
|
|
gBS->Stall (XHC_1_MILLISECOND);
|
|
Status = XhcWaitOpRegBit (Xhc, XHC_USBCMD_OFFSET, XHC_USBCMD_RESET, FALSE, Timeout);
|
|
}
|
|
|
|
return Status;
|
|
}
|
|
|
|
|
|
/**
|
|
Halt the XHCI host controller.
|
|
|
|
@param Xhc The XHCI Instance.
|
|
@param Timeout Time to wait before abort (in millisecond, ms).
|
|
|
|
@return EFI_SUCCESS The XHCI host controller is halt.
|
|
@return EFI_TIMEOUT Failed to halt the XHCI before Timeout.
|
|
|
|
**/
|
|
EFI_STATUS
|
|
XhcHaltHC (
|
|
IN USB_XHCI_INSTANCE *Xhc,
|
|
IN UINT32 Timeout
|
|
)
|
|
{
|
|
EFI_STATUS Status;
|
|
|
|
XhcClearOpRegBit (Xhc, XHC_USBCMD_OFFSET, XHC_USBCMD_RUN);
|
|
Status = XhcWaitOpRegBit (Xhc, XHC_USBSTS_OFFSET, XHC_USBSTS_HALT, TRUE, Timeout);
|
|
return Status;
|
|
}
|
|
|
|
|
|
/**
|
|
Set the XHCI host controller to run.
|
|
|
|
@param Xhc The XHCI Instance.
|
|
@param Timeout Time to wait before abort (in millisecond, ms).
|
|
|
|
@return EFI_SUCCESS The XHCI host controller is running.
|
|
@return EFI_TIMEOUT Failed to set the XHCI to run before Timeout.
|
|
|
|
**/
|
|
EFI_STATUS
|
|
XhcRunHC (
|
|
IN USB_XHCI_INSTANCE *Xhc,
|
|
IN UINT32 Timeout
|
|
)
|
|
{
|
|
EFI_STATUS Status;
|
|
|
|
XhcSetOpRegBit (Xhc, XHC_USBCMD_OFFSET, XHC_USBCMD_RUN);
|
|
Status = XhcWaitOpRegBit (Xhc, XHC_USBSTS_OFFSET, XHC_USBSTS_HALT, FALSE, Timeout);
|
|
return Status;
|
|
}
|
|
|
|
/**
|
|
Perform Intel-specific Quirks
|
|
|
|
@param PciIo The PciIo of Xhc Instance.
|
|
**/
|
|
VOID
|
|
XhcIntelQuirks (
|
|
IN EFI_PCI_IO_PROTOCOL *PciIo
|
|
)
|
|
{
|
|
EFI_STATUS Status;
|
|
UINT32 Regs[4];
|
|
struct {
|
|
UINT16 Vendor;
|
|
UINT16 Device;
|
|
} Ids;
|
|
|
|
if (!PciIo)
|
|
return;
|
|
|
|
Status = PciIo->Pci.Read(PciIo, EfiPciIoWidthUint16, 0U, 2U, &Ids);
|
|
if (EFI_ERROR(Status) || Ids.Vendor != 0x8086U)
|
|
return;
|
|
switch (Ids.Device) {
|
|
case 0x1E31U: // Panther Point
|
|
case 0x8C31U: // Lynx Point
|
|
case 0x8CB1U: // Wildcat Point
|
|
case 0x8D31U: // X99
|
|
Status = PciIo->Pci.Read(PciIo, EfiPciIoWidthUint32, 0xD0U, 4U, &Regs[0]);
|
|
if (EFI_ERROR(Status))
|
|
break;
|
|
Regs[1] |= Regs[0];
|
|
Regs[3] |= Regs[2];
|
|
if (Regs[1] != Regs[0])
|
|
(VOID) PciIo->Pci.Write(PciIo, EfiPciIoWidthUint32, 0xD0U, 1U, &Regs[1]);
|
|
if (Regs[3] != Regs[2])
|
|
(VOID) PciIo->Pci.Write(PciIo, EfiPciIoWidthUint32, 0xD8U, 1U, &Regs[3]);
|
|
break;
|
|
default:
|
|
break;
|
|
}
|
|
}
|