mirror of https://github.com/acidanthera/audk.git
126 lines
2.9 KiB
C
126 lines
2.9 KiB
C
/** @file
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ResetSystem library implementation.
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Copyright (c) 2024 Loongson Technology Corporation Limited. All rights reserved.<BR>
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SPDX-License-Identifier: BSD-2-Clause-Patent
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**/
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#include <Library/BaseLib.h> // CpuDeadLoop()
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#include <Library/DebugLib.h>
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#include <Library/IoLib.h>
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#include <Library/ResetSystemLib.h> // ResetCold()
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#include "ResetSystemAcpiGed.h"
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POWER_MANAGER mPowerManager;
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/**
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Calling this function causes a system-wide reset. This sets
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all circuitry within the system to its initial state. This type of reset
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is asynchronous to system operation and operates without regard to
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cycle boundaries.
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System reset should not return, if it returns, it means the system does
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not support cold reset.
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**/
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STATIC VOID
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AcpiGedReset (
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VOID
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)
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{
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MmioWrite8 (
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(UINTN)mPowerManager.ResetRegAddr,
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mPowerManager.ResetValue
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);
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CpuDeadLoop ();
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}
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/**
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This function causes the system to enter a power state equivalent
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to the ACPI S5 states.
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* */
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STATIC VOID
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AcpiGedShutdown (
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VOID
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)
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{
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MmioWrite8 (
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(UINTN)mPowerManager.SleepControlRegAddr,
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(1 << 5) /* enable bit */ |
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(5 << 2) /* typ == S5 */
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);
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CpuDeadLoop ();
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}
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/**
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This function causes a system-wide reset (cold reset), in which
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all circuitry within the system returns to its initial state. This type of
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reset is asynchronous to system operation and operates without regard to
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cycle boundaries.
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If this function returns, it means that the system does not support cold
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reset.
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**/
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VOID EFIAPI
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ResetCold (
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VOID
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)
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{
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AcpiGedReset ();
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}
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/**
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This function causes a system-wide initialization (warm reset), in which all
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processors are set to their initial state. Pending cycles are not corrupted.
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If this function returns, it means that the system does not support warm
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reset.
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**/
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VOID EFIAPI
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ResetWarm (
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VOID
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)
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{
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AcpiGedReset ();
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}
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/**
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This function causes a systemwide reset. The exact type of the reset is
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defined by the EFI_GUID that follows the Null-terminated Unicode string passed
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into ResetData. If the platform does not recognize the EFI_GUID in ResetData
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the platform must pick a supported reset type to perform.The platform may
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optionally log the parameters from any non-normal reset that occurs.
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@param[in] DataSize The size, in bytes, of ResetData.
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@param[in] ResetData The data buffer starts with a Null-terminated string,
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followed by the EFI_GUID.
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**/
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VOID
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EFIAPI
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ResetPlatformSpecific (
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IN UINTN DataSize,
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IN VOID *ResetData
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)
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{
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AcpiGedReset ();
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}
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/**
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This function causes the system to enter a power state equivalent
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to the ACPI G2/S5 or G3 states.
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If this function returns, it means that the system does not support shut down
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reset.
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**/
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VOID EFIAPI
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ResetShutdown (
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VOID
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)
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{
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AcpiGedShutdown ();
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}
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