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/** @file
DXE Reset System Library instance that calls gRT->ResetSystem().
Copyright (c) 2017 - 2019, Intel Corporation. All rights reserved.<BR>
SPDX-License-Identifier: BSD-2-Clause-Patent
**/
#include <PiDxe.h>
#include <Library/ResetSystemLib.h>
#include <Library/UefiRuntimeServicesTableLib.h>
#include <Library/UefiBootServicesTableLib.h>
#include <Library/DebugLib.h>
EFI_EVENT mRuntimeResetSystemLibVirtualAddressChangeEvent;
static EFI_RUNTIME_SERVICES *mInternalRT;
/**
This function causes a system-wide reset (cold reset), in which
all circuitry within the system returns to its initial state. This type of reset
is asynchronous to system operation and operates without regard to
cycle boundaries.
If this function returns, it means that the system does not support cold reset.
**/
VOID
EFIAPI
ResetCold (
VOID
)
{
mInternalRT->ResetSystem (EfiResetCold, EFI_SUCCESS, 0, NULL);
}
/**
This function causes a system-wide initialization (warm reset), in which all processors
are set to their initial state. Pending cycles are not corrupted.
If this function returns, it means that the system does not support warm reset.
**/
VOID
EFIAPI
ResetWarm (
VOID
)
{
mInternalRT->ResetSystem (EfiResetWarm, EFI_SUCCESS, 0, NULL);
}
/**
This function causes the system to enter a power state equivalent
to the ACPI G2/S5 or G3 states.
If this function returns, it means that the system does not support shut down reset.
**/
VOID
EFIAPI
ResetShutdown (
VOID
)
{
mInternalRT->ResetSystem (EfiResetShutdown, EFI_SUCCESS, 0, NULL);
}
/**
This function causes a systemwide reset. The exact type of the reset is
defined by the EFI_GUID that follows the Null-terminated Unicode string passed
into ResetData. If the platform does not recognize the EFI_GUID in ResetData
the platform must pick a supported reset type to perform.The platform may
optionally log the parameters from any non-normal reset that occurs.
@param[in] DataSize The size, in bytes, of ResetData.
@param[in] ResetData The data buffer starts with a Null-terminated string,
followed by the EFI_GUID.
**/
VOID
EFIAPI
ResetPlatformSpecific (
IN UINTN DataSize,
IN VOID *ResetData
)
{
mInternalRT->ResetSystem (EfiResetPlatformSpecific, EFI_SUCCESS, DataSize, ResetData);
}
/**
The ResetSystem function resets the entire platform.
@param[in] ResetType The type of reset to perform.
@param[in] ResetStatus The status code for the reset.
@param[in] DataSize The size, in bytes, of ResetData.
@param[in] ResetData For a ResetType of EfiResetCold, EfiResetWarm, or EfiResetShutdown
the data buffer starts with a Null-terminated string, optionally
followed by additional binary data. The string is a description
that the caller may use to further indicate the reason for the
system reset.
**/
VOID
EFIAPI
ResetSystem (
IN EFI_RESET_TYPE ResetType,
IN EFI_STATUS ResetStatus,
IN UINTN DataSize,
IN VOID *ResetData OPTIONAL
)
{
mInternalRT->ResetSystem (ResetType, ResetStatus, DataSize, ResetData);
}
/**
Notification function of EVT_SIGNAL_VIRTUAL_ADDRESS_CHANGE.
@param Event Event whose notification function is being invoked.
@param Context Pointer to the notification function's context
**/
VOID
EFIAPI
RuntimeResetSystemLibVirtualAddressChange (
IN EFI_EVENT Event,
IN VOID *Context
)
{
mInternalRT->ConvertPointer (0, (VOID **)&mInternalRT);
}
/**
The constructor function of Runtime Reset System Lib.
This function allocates memory for extended status code data, caches
the report status code service, and registers events.
@param ImageHandle The firmware allocated handle for the EFI image.
@param SystemTable A pointer to the EFI System Table.
@retval EFI_SUCCESS The constructor always returns EFI_SUCCESS.
**/
EFI_STATUS
EFIAPI
RuntimeResetSystemLibConstruct (
IN EFI_HANDLE ImageHandle,
IN EFI_SYSTEM_TABLE *SystemTable
)
{
EFI_STATUS Status;
//
// Library should not use the gRT directly, for it may be converted by other library instance.
//
mInternalRT = gRT;
//
// Register notify function for EVT_SIGNAL_VIRTUAL_ADDRESS_CHANGE
//
Status = gBS->CreateEventEx (
EVT_NOTIFY_SIGNAL,
TPL_NOTIFY,
RuntimeResetSystemLibVirtualAddressChange,
NULL,
&gEfiEventVirtualAddressChangeGuid,
&mRuntimeResetSystemLibVirtualAddressChangeEvent
);
ASSERT_EFI_ERROR (Status);
return EFI_SUCCESS;
}
/**
The Deconstructor function of Runtime Reset System Lib.
The destructor function frees memory allocated by constructor, and closes related events.
It will ASSERT() if that related operation fails and it will always return EFI_SUCCESS.
@param ImageHandle The firmware allocated handle for the EFI image.
@param SystemTable A pointer to the EFI System Table.
@retval EFI_SUCCESS The constructor always returns EFI_SUCCESS.
**/
EFI_STATUS
EFIAPI
RuntimeResetSystemLibDeconstruct (
IN EFI_HANDLE ImageHandle,
IN EFI_SYSTEM_TABLE *SystemTable
)
{
EFI_STATUS Status;
ASSERT (gBS != NULL);
Status = gBS->CloseEvent (mRuntimeResetSystemLibVirtualAddressChangeEvent);
ASSERT_EFI_ERROR (Status);
return EFI_SUCCESS;
}
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