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148 lines
3.7 KiB
C
148 lines
3.7 KiB
C
/** @file
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Reset System Library functions for PCAT platforms
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Copyright (c) 2006 - 2019, Intel Corporation. All rights reserved.<BR>
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SPDX-License-Identifier: BSD-2-Clause-Patent
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**/
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#include <Base.h>
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#include <Uefi/UefiBaseType.h>
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#include <Uefi/UefiMultiPhase.h>
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#include <Library/DebugLib.h>
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#include <Library/IoLib.h>
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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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VOID
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EFIAPI
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ResetCold (
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VOID
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)
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{
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IoWrite8 ((UINTN) PcdGet64 (PcdResetControlRegister), PcdGet8 (PcdResetControlValueColdReset));
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}
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/**
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Calling this function causes a system-wide initialization. The processors
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are set to their initial state, and pending cycles are not corrupted.
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System reset should not return, if it returns, it means the system does
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not support warm reset.
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**/
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VOID
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EFIAPI
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ResetWarm (
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VOID
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)
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{
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IoWrite8 ((UINTN) PcdGet64 (PcdResetControlRegister), PcdGet8 (PcdResetControlValueColdReset));
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}
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/**
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Calling 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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System shutdown should not return, if it returns, it means the system does
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not support shut down reset.
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**/
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VOID
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EFIAPI
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ResetShutdown (
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VOID
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)
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{
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ASSERT (FALSE);
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}
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/**
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Calling this function causes the system to enter a power state for capsule
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update.
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Reset update should not return, if it returns, it means the system does
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not support capsule update.
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**/
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VOID
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EFIAPI
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EnterS3WithImmediateWake (
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VOID
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)
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{
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ASSERT (FALSE);
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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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ResetCold ();
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}
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/**
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The ResetSystem function resets the entire platform.
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@param[in] ResetType The type of reset to perform.
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@param[in] ResetStatus The status code for the reset.
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@param[in] DataSize The size, in bytes, of ResetData.
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@param[in] ResetData For a ResetType of EfiResetCold, EfiResetWarm, or EfiResetShutdown
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the data buffer starts with a Null-terminated string, optionally
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followed by additional binary data. The string is a description
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that the caller may use to further indicate the reason for the
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system reset.
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**/
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VOID
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EFIAPI
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ResetSystem (
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IN EFI_RESET_TYPE ResetType,
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IN EFI_STATUS ResetStatus,
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IN UINTN DataSize,
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IN VOID *ResetData OPTIONAL
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)
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{
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switch (ResetType) {
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case EfiResetWarm:
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ResetWarm ();
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break;
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case EfiResetCold:
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ResetCold ();
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break;
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case EfiResetShutdown:
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ResetShutdown ();
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return;
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case EfiResetPlatformSpecific:
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ResetPlatformSpecific (DataSize, ResetData);
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return;
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default:
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return;
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}
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}
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