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/** @file
Copyright (c) 2008 - 2009, Apple Inc. All rights reserved.<BR>
Portions copyright (c) 2011 - 2014, ARM Ltd. All rights reserved.<BR>
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 <AArch64/AArch64.h>
#include "AArch64Lib.h"
#include "ArmLibPrivate.h"
/**
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 ((ArmReadIdAA64Pfr0 () & AARCH64_PFR0_GIC) != 0);
}
/**
Check whether the CPU supports the GICv5 system register interface
@return Whether GICv5 System Register Interface is supported
**/
BOOLEAN
EFIAPI
ArmHasGicV5SystemRegisters (
VOID
)
{
return ((ArmReadIdAA64Pfr2 () & AARCH64_PFR2_GCIE) != 0);
}
/** Checks if CCIDX is implemented.
@retval TRUE CCIDX is implemented.
@retval FALSE CCIDX is not implemented.
**/
BOOLEAN
EFIAPI
ArmHasCcidx (
VOID
)
{
UINTN Mmfr2;
Mmfr2 = ArmReadIdAA64Mmfr2 ();
return (((Mmfr2 >> 20) & 0xF) == 1) ? TRUE : FALSE;
}
/**
Checks whether the CPU implements the Virtualization Host Extensions.
@retval TRUE FEAT_VHE is implemented.
@retval FALSE FEAT_VHE is not implemented.
**/
BOOLEAN
EFIAPI
ArmHasVhe (
VOID
)
{
return ((ArmReadIdAA64Mmfr1 () & AARCH64_MMFR1_VH) != 0);
}
/**
Checks whether the CPU implements the Trace Buffer Extension.
@retval TRUE FEAT_TRBE is implemented.
@retval FALSE FEAT_TRBE is not implemented.
**/
BOOLEAN
EFIAPI
ArmHasTrbe (
VOID
)
{
return ((ArmReadIdAA64Dfr0 () & AARCH64_DFR0_TRBE) != 0);
}
/**
Checks whether the CPU implements the Embedded Trace Extension.
@retval TRUE FEAT_ETE is implemented.
@retval FALSE FEAT_ETE is not implemented.
**/
BOOLEAN
EFIAPI
ArmHasEte (
VOID
)
{
// The ID_AA64DFR0_EL1.TraceVer field identifies the presence of FEAT_ETE.
return ((ArmReadIdAA64Dfr0 () & AARCH64_DFR0_TRACEVER) != 0);
}
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