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ArmPkg: Add helper to read CCIDX status

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Add a helper function to determine CCIDX support.

Signed-off-by: Rebecca Cran <rebecca@nuviainc.com>
Reviewed-by: Sami Mujawar <sami.mujawar@arm.com>
Reviewed-by: Leif Lindholm <leif@nuviainc.com>
This commit is contained in:
Rebecca Cran 2021-02-07 17:52:42 -07:00 committed by mergify[bot]
parent 4f92cfa44d
commit 6e131aff00
3 changed files with 47 additions and 2 deletions
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11
ArmPkg/Include/Library/ArmLib.h
View File

@ -725,6 +725,17 @@ ArmHasGicSystemRegisters (
VOID
);
/** Checks if CCIDX is implemented.
@retval TRUE CCIDX is implemented.
@retval FALSE CCIDX is not implemented.
**/
BOOLEAN
EFIAPI
ArmHasCcidx (
VOID
);
#ifdef MDE_CPU_ARM
///
/// AArch32-only ID Register Helper functions

19
ArmPkg/Library/ArmLib/AArch64/AArch64Lib.c
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@ -2,7 +2,7 @@
Copyright (c) 2008 - 2009, Apple Inc. All rights reserved.<BR>
Portions copyright (c) 2011 - 2014, ARM Ltd. All rights reserved.<BR>
Copyright (c) 2020, NUVIA Inc. All rights reserved.<BR>
Copyright (c) 2021, NUVIA Inc. All rights reserved.<BR>
SPDX-License-Identifier: BSD-2-Clause-Patent
@ -87,3 +87,20 @@ ArmHasGicSystemRegisters (
{
return ((ArmReadIdAA64Pfr0 () & AARCH64_PFR0_GIC) != 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;
}

19
ArmPkg/Library/ArmLib/Arm/ArmV7Lib.c
View File

@ -2,7 +2,7 @@
Copyright (c) 2008 - 2009, Apple Inc. All rights reserved.<BR>
Copyright (c) 2011 - 2014, ARM Limited. All rights reserved.
Copyright (c) 2020, NUVIA Inc. All rights reserved.<BR>
Copyright (c) 2021, NUVIA Inc. All rights reserved.<BR>
SPDX-License-Identifier: BSD-2-Clause-Patent
@ -102,3 +102,20 @@ ArmHasSecurityExtensions (
{
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;
}