/** @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 (); | |
} |