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/** @file
Copyright (c) 2008 - 2009, Apple Inc. All rights reserved.<BR>
Copyright (c) 2011 - 2014, ARM Limited. All rights reserved.
Copyright (c) 2021, NUVIA Inc. All rights reserved.<BR>
SPDX-License-Identifier: BSD-2-Clause-Patent
**/
#include <Base.h>
#include <Library/ArmLib.h>
#include <Library/DebugLib.h>
#include <Arm/AArch32.h>
#include "ArmV7Lib.h"
#include "ArmLibPrivate.h"
VOID
ArmV7DataCacheOperation (
IN ARM_V7_CACHE_OPERATION DataCacheOperation
)
{
UINTN SavedInterruptState;
SavedInterruptState = ArmGetInterruptState ();
ArmDisableInterrupts ();
ArmV7AllDataCachesOperation (DataCacheOperation);
ArmDataSynchronizationBarrier ();
if (SavedInterruptState) {
ArmEnableInterrupts ();
}
}
VOID
EFIAPI
ArmInvalidateDataCache (
VOID
)
{
ASSERT (!ArmMmuEnabled ());
ArmDataSynchronizationBarrier ();
ArmV7DataCacheOperation (ArmInvalidateDataCacheEntryBySetWay);
}
VOID
EFIAPI
ArmCleanInvalidateDataCache (
VOID
)
{
ASSERT (!ArmMmuEnabled ());
ArmDataSynchronizationBarrier ();
ArmV7DataCacheOperation (ArmCleanInvalidateDataCacheEntryBySetWay);
}
VOID
EFIAPI
ArmCleanDataCache (
VOID
)
{
ASSERT (!ArmMmuEnabled ());
ArmDataSynchronizationBarrier ();
ArmV7DataCacheOperation (ArmCleanDataCacheEntryBySetWay);
}
/**
Check whether the CPU supports the GIC system register interface (any version)
@return Whether GIC System Register Interface is supported
**/
BOOLEAN
EFIAPI
ArmHasGicSystemRegisters (
VOID
)
{
return ((ArmReadIdPfr1 () & ARM_PFR1_GIC) != 0);
}
/**
Check whether the CPU supports the Security extensions
@return Whether the Security extensions are implemented
**/
BOOLEAN
EFIAPI
ArmHasSecurityExtensions (
VOID
)
{
return ((ArmReadIdPfr1 () & ARM_PFR1_SEC) != 0);
}
/** Checks if CCIDX is implemented.
@retval TRUE CCIDX is implemented.
@retval FALSE CCIDX is not implemented.
**/
BOOLEAN
EFIAPI
ArmHasCcidx (
VOID
)
{
UINTN Mmfr4;
Mmfr4 = ArmReadIdMmfr4 ();
return (((Mmfr4 >> 24) & 0xF) == 1) ? TRUE : FALSE;
}
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