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- /** @file
- ResetSystem library implementation.
- Copyright (c) 2022 Loongson Technology Corporation Limited. All rights reserved.<BR>
- SPDX-License-Identifier: BSD-2-Clause-Patent
- **/
- #include <Base.h>
- #include <Uefi.h>
- #include <PiPei.h>
- #include <Library/BaseLib.h> // CpuDeadLoop()
- #include <Library/DebugLib.h>
- #include <Library/ResetSystemLib.h> // ResetCold()
- #include <Library/IoLib.h>
- #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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