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/** @file
ResetSystem library implementation.
Copyright (c) 2024 Loongson Technology Corporation Limited. All rights reserved.<BR>
SPDX-License-Identifier: BSD-2-Clause-Patent
**/
#include <Library/BaseLib.h> // CpuDeadLoop()
#include <Library/DebugLib.h>
#include <Library/IoLib.h>
#include <Library/ResetSystemLib.h> // ResetCold()
#include "ResetSystemAcpiGed.h"
POWER_MANAGER mPowerManager;
/**
Calling this function causes a system-wide reset. This sets
all circuitry within the system to its initial state. This type of reset
is asynchronous to system operation and operates without regard to
cycle boundaries.
System reset should not return, if it returns, it means the system does
not support cold reset.
**/
STATIC VOID
AcpiGedReset (
VOID
)
{
MmioWrite8 (
(UINTN)mPowerManager.ResetRegAddr,
mPowerManager.ResetValue
);
CpuDeadLoop ();
}
/**
This function causes the system to enter a power state equivalent
to the ACPI S5 states.
* */
STATIC VOID
AcpiGedShutdown (
VOID
)
{
MmioWrite8 (
(UINTN)mPowerManager.SleepControlRegAddr,
(1 << 5) /* enable bit */ |
(5 << 2) /* typ == S5 */
);
CpuDeadLoop ();
}
/**
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
)
{
AcpiGedReset ();
}
/**
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
)
{
AcpiGedReset ();
}
/**
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
)
{
AcpiGedReset ();
}
/**
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
)
{
AcpiGedShutdown ();
}
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