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/** @file
PCH RESET PEIM DRIVER.
@copyright
Copyright (c) 2011 - 2012 Intel Corporation. All rights reserved
This software and associated documentation (if any) is furnished
under a license and may only be used or copied in accordance
with the terms of the license. Except as permitted by such
license, no part of this software or documentation may be
reproduced, stored in a retrieval system, or transmitted in any
form or by any means without the express written consent of
Intel Corporation.
This file contains an 'Intel Peripheral Driver' and uniquely
identified as "Intel Reference Module" and is
licensed for Intel CPUs and chipsets under the terms of your
license agreement with Intel or your vendor. This file may
be modified by the user, subject to additional terms of the
license agreement
**/
#include "PchReset.h"
/**
Installs PCH RESET PPI
@param[in] FfsHeader Not used.
@param[in] PeiServices General purpose services available to every PEIM.
@retval EFI_SUCCESS PCH SPI PPI is installed successfully
@retval EFI_OUT_OF_RESOURCES Can't allocate pool
**/
EFI_STATUS
InstallPchReset (
IN EFI_FFS_FILE_HEADER *FfsHeader,
IN EFI_PEI_SERVICES **PeiServices
)
{
EFI_STATUS Status;
PEI_PCH_RESET_INSTANCE *PeiPchResetInstance;
PCH_RESET_INSTANCE *PchResetInstance;
DEBUG ((EFI_D_INFO, "InstallPchReset() Start\n"));
PeiPchResetInstance = (PEI_PCH_RESET_INSTANCE *) AllocateZeroPool (sizeof (PEI_PCH_RESET_INSTANCE));
if (NULL == PeiPchResetInstance) {
return EFI_OUT_OF_RESOURCES;
}
PchResetInstance = &(PeiPchResetInstance->PchResetInstance);
PchResetProtocolConstructor (PchResetInstance);
PeiPchResetInstance->PpiDescriptor.Flags = EFI_PEI_PPI_DESCRIPTOR_PPI | EFI_PEI_PPI_DESCRIPTOR_TERMINATE_LIST;
PeiPchResetInstance->PpiDescriptor.Guid = &gPchResetPpiGuid;
PeiPchResetInstance->PpiDescriptor.Ppi = &(PchResetInstance->PchResetProtocol);
///
/// Install the PCH RESET PPI
///
Status = (**PeiServices).InstallPpi (PeiServices, &PeiPchResetInstance->PpiDescriptor);
ASSERT_EFI_ERROR (Status);
DEBUG ((EFI_D_INFO, "PCH RESET PPI Installed\n"));
DEBUG ((EFI_D_INFO, "InstallPchReset() End\n"));
return Status;
}
/**
Execute call back function for Pch Reset.
@param[in] PchResetType Pch Reset Types which includes PowerCycle, Globalreset.
@retval EFI_SUCCESS The callback function has been done successfully
@exception EFI_UNSUPPORTED Do not do any reset from PCH
**/
EFI_STATUS
PchResetCallback (
IN PCH_RESET_TYPE PchResetType
)
{
EFI_STATUS Status;
UINTN Instance;
PCH_RESET_CALLBACK_PPI *PchResetCallbackPpi;
if ((PchResetType == GlobalReset) || (PchResetType == GlobalResetWithEc)) {
///
/// After MRC is done, DRAM Init Done message will be sent to ME FW.
///
Status = PeiServicesLocatePpi (
&gEfiPeiMemoryDiscoveredPpiGuid,
0,
NULL,
NULL
);
if (Status == EFI_SUCCESS) {
///
/// After sending DRAM Init Done to ME FW, please do the global reset through HECI.
///
DEBUG ((EFI_D_ERROR, "Please do the global reset through HECI \n"));
return EFI_UNSUPPORTED;
}
}
Instance = 0;
do {
///
/// Those drivers that need to install Pch Reset Callback Ppi have the responsibility
/// to make sure themselves execute before Pch Reset PEI driver.
///
Status = PeiServicesLocatePpi (
&gPchResetCallbackPpiGuid,
Instance,
NULL,
(VOID**) &PchResetCallbackPpi
);
if (Status == EFI_SUCCESS) {
PchResetCallbackPpi->ResetCallback (PchResetType);
} else {
if ((Instance == 0) && (Status == EFI_NOT_FOUND)) {
DEBUG ((EFI_D_ERROR | EFI_D_INFO, "None of Pch Reset Callback Ppi is found .\n"));
} else {
DEBUG ((EFI_D_INFO, "Failed to locate Pch Reset Callback Ppi.\n"));
}
}
Instance++;
} while (Status != EFI_NOT_FOUND);
return EFI_SUCCESS;
}
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