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/** @file
MP Support driver.
Copyright (c) 1999 - 2015, 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
http://opensource.org/licenses/bsd-license.php.
THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
**/
#include "CpuDxe.h"
#include "MpCommon.h"
#include "PlatformMpService.h"
extern EFI_CPU_MICROCODE_HEADER **mMicrocodePointerBuffer;
ACPI_CPU_DATA_COMPATIBILITY *mAcpiCpuData;
MP_SYSTEM_DATA *mMPSystemData;
EFI_DEVICE_PATH_PROTOCOL *
AppendDevicePath (
IN EFI_DEVICE_PATH_PROTOCOL *Src1,
IN EFI_DEVICE_PATH_PROTOCOL *Src2
);
UINTN
DevicePathSize (
IN EFI_DEVICE_PATH_PROTOCOL *DevicePath
);
/**
Initializes MP support in the system.
@param[in] ImageHandle Image handle of the loaded driver
@param[in] *SystemTable Pointer to the System Table
@retval EFI_SUCCESS Multiple processors are initialized successfully.
@retval EFI_NOT_FOUND The ACPI variable is not found in S3 boot path.
@retval EFI_OUT_OF_RESOURCES No enough resoruces (such as out of memory).
**/
EFI_STATUS
InitializeMpSupport (
IN EFI_HANDLE ImageHandle,
IN EFI_SYSTEM_TABLE *SystemTable
)
{
EFI_STATUS Status;
MP_CPU_RESERVED_DATA *MpCpuReservedData;
MpCpuReservedData = NULL;
if (ImageHandle != NULL) {
Status = AllocateReservedMemoryBelow4G (
sizeof (MP_CPU_RESERVED_DATA),
(VOID **) &MpCpuReservedData
);
if (EFI_ERROR (Status)) {
return Status;
}
ZeroMem (MpCpuReservedData, sizeof (MP_CPU_RESERVED_DATA));
mMPSystemData = &(MpCpuReservedData->MPSystemData);
mAcpiCpuData = &(MpCpuReservedData->AcpiCpuData);
CopyMem (
MpCpuReservedData->MicrocodePointerBuffer,
mMicrocodePointerBuffer,
sizeof (EFI_CPU_MICROCODE_HEADER *) * (NUMBER_OF_MICROCODE_UPDATE + 1)
);
mAcpiCpuData->CpuPrivateData = (EFI_PHYSICAL_ADDRESS)(UINTN)(&(mMPSystemData->S3DataPointer));
mAcpiCpuData->S3BootPath = FALSE;
mAcpiCpuData->MicrocodePointerBuffer = (EFI_PHYSICAL_ADDRESS)(UINTN)(MpCpuReservedData->MicrocodePointerBuffer);
mAcpiCpuData->GdtrProfile = (EFI_PHYSICAL_ADDRESS)(UINTN)(&(MpCpuReservedData->GdtrProfile));
mAcpiCpuData->IdtrProfile = (EFI_PHYSICAL_ADDRESS)(UINTN)(&(MpCpuReservedData->IdtrProfile));
MpServiceInitialize ();
}
return EFI_SUCCESS;
}
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