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/** @file
Do a generic Cold Reset for OMAP3550 and BeagleBoard specific Warm reset
Copyright (c) 2008 - 2010, Apple Inc. All rights reserved.<BR>
Copyright (c) 2017, Linaro Ltd. All rights reserved.<BR>
Copyright (c) 2019, Intel Corporation. All rights reserved.<BR>
SPDX-License-Identifier: BSD-2-Clause-Patent
**/
#include <Uefi.h>
#include <Library/IoLib.h>
#include <Library/ResetSystemLib.h>
#include <Omap3530/Omap3530.h>
/**
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
)
{
//Perform cold reset of the system.
MmioOr32 (PRM_RSTCTRL, RST_DPLL3);
while ((MmioRead32(PRM_RSTST) & GLOBAL_COLD_RST) != 0x1);
}
/**
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
)
{
ResetCold ();
}
/**
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
)
{
// not implemented
}
/**
This function causes the system to enter S3 and then wake up immediately.
If this function returns, it means that the system does not support S3
feature.
**/
VOID
EFIAPI
EnterS3WithImmediateWake (
VOID
)
{
// not implemented
}
/**
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 ();
}
/**
The ResetSystem function resets the entire platform.
@param[in] ResetType The type of reset to perform.
@param[in] ResetStatus The status code for the reset.
@param[in] DataSize The size, in bytes, of ResetData.
@param[in] ResetData For a ResetType of EfiResetCold, EfiResetWarm, or EfiResetShutdown
the data buffer starts with a Null-terminated string, optionally
followed by additional binary data. The string is a description
that the caller may use to further indicate the reason for the
system reset.
**/
VOID
EFIAPI
ResetSystem (
IN EFI_RESET_TYPE ResetType,
IN EFI_STATUS ResetStatus,
IN UINTN DataSize,
IN VOID *ResetData OPTIONAL
)
{
switch (ResetType) {
case EfiResetWarm:
ResetWarm ();
break;
case EfiResetCold:
ResetCold ();
break;
case EfiResetShutdown:
ResetShutdown ();
return;
case EfiResetPlatformSpecific:
ResetPlatformSpecific (DataSize, ResetData);
return;
default:
return;
}
}
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