/** @file | |
Reset System Library functions for bootloader | |
Copyright (c) 2014 - 2019, Intel Corporation. All rights reserved.<BR> | |
SPDX-License-Identifier: BSD-2-Clause-Patent | |
**/ | |
#include <PiDxe.h> | |
#include <Library/BaseLib.h> | |
#include <Library/DebugLib.h> | |
#include <Library/IoLib.h> | |
#include <Library/HobLib.h> | |
#include <Library/BaseMemoryLib.h> | |
#include <Guid/AcpiBoardInfoGuid.h> | |
ACPI_BOARD_INFO mAcpiBoardInfo; | |
/** | |
The constructor function to initialize mAcpiBoardInfo. | |
@retval EFI_SUCCESS The constructor always returns RETURN_SUCCESS. | |
**/ | |
RETURN_STATUS | |
EFIAPI | |
ResetSystemLibConstructor ( | |
VOID | |
) | |
{ | |
EFI_HOB_GUID_TYPE *GuidHob; | |
ACPI_BOARD_INFO *AcpiBoardInfoPtr; | |
// | |
// Find the acpi board information guid hob | |
// | |
GuidHob = GetFirstGuidHob (&gUefiAcpiBoardInfoGuid); | |
ASSERT (GuidHob != NULL); | |
AcpiBoardInfoPtr = (ACPI_BOARD_INFO *)GET_GUID_HOB_DATA (GuidHob); | |
CopyMem (&mAcpiBoardInfo, AcpiBoardInfoPtr, sizeof (ACPI_BOARD_INFO)); | |
return EFI_SUCCESS; | |
} | |
/** | |
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. | |
**/ | |
VOID | |
EFIAPI | |
ResetCold ( | |
VOID | |
) | |
{ | |
IoWrite8 ((UINTN)mAcpiBoardInfo.ResetRegAddress, mAcpiBoardInfo.ResetValue); | |
CpuDeadLoop (); | |
} | |
/** | |
Calling this function causes a system-wide initialization. The processors | |
are set to their initial state, and pending cycles are not corrupted. | |
System reset should not return, if it returns, it means the system does | |
not support warm reset. | |
**/ | |
VOID | |
EFIAPI | |
ResetWarm ( | |
VOID | |
) | |
{ | |
IoWrite8 ((UINTN)mAcpiBoardInfo.ResetRegAddress, mAcpiBoardInfo.ResetValue); | |
CpuDeadLoop (); | |
} | |
/** | |
Calling this function causes the system to enter a power state equivalent | |
to the ACPI G2/S5 or G3 states. | |
System shutdown should not return, if it returns, it means the system does | |
not support shut down reset. | |
**/ | |
VOID | |
EFIAPI | |
ResetShutdown ( | |
VOID | |
) | |
{ | |
UINTN PmCtrlReg; | |
// | |
// GPE0_EN should be disabled to avoid any GPI waking up the system from S5 | |
// | |
IoWrite16 ((UINTN)mAcpiBoardInfo.PmGpeEnBase, 0); | |
// | |
// Clear Power Button Status | |
// | |
IoWrite16((UINTN) mAcpiBoardInfo.PmEvtBase, BIT8); | |
// | |
// Transform system into S5 sleep state | |
// | |
PmCtrlReg = (UINTN)mAcpiBoardInfo.PmCtrlRegBase; | |
IoAndThenOr16 (PmCtrlReg, (UINT16) ~0x3c00, (UINT16) (7 << 10)); | |
IoOr16 (PmCtrlReg, BIT13); | |
CpuDeadLoop (); | |
ASSERT (FALSE); | |
} | |
/** | |
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 | |
) | |
{ | |
ResetCold (); | |
} |