/** @file
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Initializes Serial IO Controllers.
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Copyright (c) 2017, Intel Corporation. All rights reserved.<BR>
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SPDX-License-Identifier: BSD-2-Clause-Patent
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**/
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#include <PchInit.h>
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#include <Library/PchSerialIoLib.h>
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/**
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Puts all SerialIo controllers (except UARTs in debug mode) in D3
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Clears MemoryEnable for all PCI-mode controllers
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**/
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EFI_STATUS
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ConfigureSerialIoAtBoot (
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VOID
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)
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{
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PCH_SERIAL_IO_CONTROLLER Index;
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UINTN PciCfgBase;
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for (Index = 0; Index < PchSerialIoIndexMax; Index++) {
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if ((mPchConfigHob->SerialIo.DevMode[Index] == PchSerialIoDisabled) ||
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(mPchConfigHob->SerialIo.DevMode[Index] == PchSerialIoSkipInit) ) {
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continue;
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}
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if ((Index >= PchSerialIoIndexUart0) &&
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(mPchConfigHob->SerialIo.EnableDebugUartAfterPost) &&
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(mPchConfigHob->SerialIo.DebugUartNumber == (UINT32) (Index - PchSerialIoIndexUart0))) {
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continue;
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}
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PciCfgBase = FindSerialIoBar (Index,1);
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MmioOr32 (PciCfgBase + R_PCH_SERIAL_IO_PME_CTRL_STS, B_PCH_SERIAL_IO_PME_CTRL_STS_PWR_ST);
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MmioRead32 (PciCfgBase + R_PCH_SERIAL_IO_PME_CTRL_STS);
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if (mPchConfigHob->SerialIo.DevMode[Index] == PchSerialIoPci) {
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MmioAnd32 (PciCfgBase + PCI_COMMAND_OFFSET, (UINT32)~(EFI_PCI_COMMAND_MEMORY_SPACE | EFI_PCI_COMMAND_BUS_MASTER) );
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}
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}
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return EFI_SUCCESS;
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}
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