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/** @file
Reset System Library functions for OVMF
Copyright (c) 2006 - 2019, Intel Corporation. All rights reserved.<BR>
SPDX-License-Identifier: BSD-2-Clause-Patent
**/
#include <Base.h> // BIT1
#include <PiDxe.h>
#include <Library/BaseLib.h> // CpuDeadLoop()
#include <Library/DebugLib.h> // ASSERT()
#include <Library/DxeServicesTableLib.h>
#include <Library/IoLib.h> // IoWrite8()
#include <Library/ResetSystemLib.h> // ResetCold()
#include <Library/TimerLib.h> // MicroSecondDelay()
#include <Library/UefiRuntimeLib.h> // EfiGoneVirtual()
#include <OvmfPlatforms.h> // PIIX4_PMBA_VALUE
EFI_STATUS
EFIAPI
DxeResetSystemLibMicrovmConstructor (
IN EFI_HANDLE ImageHandle,
IN EFI_SYSTEM_TABLE *SystemTable
)
{
UINTN Address = MICROVM_GED_MMIO_BASE;
EFI_STATUS Status;
EFI_GCD_MEMORY_SPACE_DESCRIPTOR Descriptor;
DEBUG ((DEBUG_INFO, "%a: start\n", __FUNCTION__));
Status = gDS->GetMemorySpaceDescriptor (Address, &Descriptor);
if (EFI_ERROR (Status)) {
DEBUG ((DEBUG_INFO, "%a: GetMemorySpaceDescriptor failed\n", __FUNCTION__));
return RETURN_UNSUPPORTED;
}
Status = gDS->SetMemorySpaceAttributes (Address, SIZE_4KB,
Descriptor.Attributes | EFI_MEMORY_RUNTIME);
if (EFI_ERROR (Status)) {
DEBUG ((DEBUG_INFO, "%a: SetMemorySpaceAttributes failed\n", __FUNCTION__));
return RETURN_UNSUPPORTED;
}
DEBUG ((DEBUG_INFO, "%a: done\n", __FUNCTION__));
return EFI_SUCCESS;
}
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