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https://github.com/CloverHackyColor/CloverBootloader.git
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122 lines
2.1 KiB
C
122 lines
2.1 KiB
C
/** @file
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Copyright (c) 2008 - 2009, Apple Inc. All rights reserved.<BR>
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Copyright (c) 2011 - 2014, ARM Limited. All rights reserved.
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Copyright (c) 2021, NUVIA Inc. All rights reserved.<BR>
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SPDX-License-Identifier: BSD-2-Clause-Patent
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**/
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#include <Base.h>
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#include <Library/ArmLib.h>
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#include <Library/DebugLib.h>
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#include <Chipset/ArmV7.h>
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#include "ArmV7Lib.h"
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#include "ArmLibPrivate.h"
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VOID
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ArmV7DataCacheOperation (
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IN ARM_V7_CACHE_OPERATION DataCacheOperation
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)
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{
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UINTN SavedInterruptState;
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SavedInterruptState = ArmGetInterruptState ();
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ArmDisableInterrupts ();
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ArmV7AllDataCachesOperation (DataCacheOperation);
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ArmDataSynchronizationBarrier ();
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if (SavedInterruptState) {
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ArmEnableInterrupts ();
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}
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}
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VOID
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EFIAPI
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ArmInvalidateDataCache (
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VOID
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)
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{
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ASSERT (!ArmMmuEnabled ());
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ArmDataSynchronizationBarrier ();
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ArmV7DataCacheOperation (ArmInvalidateDataCacheEntryBySetWay);
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}
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VOID
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EFIAPI
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ArmCleanInvalidateDataCache (
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VOID
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)
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{
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ASSERT (!ArmMmuEnabled ());
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ArmDataSynchronizationBarrier ();
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ArmV7DataCacheOperation (ArmCleanInvalidateDataCacheEntryBySetWay);
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}
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VOID
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EFIAPI
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ArmCleanDataCache (
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VOID
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)
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{
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ASSERT (!ArmMmuEnabled ());
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ArmDataSynchronizationBarrier ();
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ArmV7DataCacheOperation (ArmCleanDataCacheEntryBySetWay);
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}
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/**
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Check whether the CPU supports the GIC system register interface (any version)
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@return Whether GIC System Register Interface is supported
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**/
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BOOLEAN
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EFIAPI
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ArmHasGicSystemRegisters (
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VOID
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)
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{
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return ((ArmReadIdPfr1 () & ARM_PFR1_GIC) != 0);
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}
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/**
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Check whether the CPU supports the Security extensions
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@return Whether the Security extensions are implemented
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**/
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BOOLEAN
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EFIAPI
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ArmHasSecurityExtensions (
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VOID
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)
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{
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return ((ArmReadIdPfr1 () & ARM_PFR1_SEC) != 0);
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}
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/** Checks if CCIDX is implemented.
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@retval TRUE CCIDX is implemented.
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@retval FALSE CCIDX is not implemented.
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**/
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BOOLEAN
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EFIAPI
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ArmHasCcidx (
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VOID
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)
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{
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UINTN Mmfr4;
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Mmfr4 = ArmReadIdMmfr4 ();
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return (((Mmfr4 >> 24) & 0xF) == 1) ? TRUE : FALSE;
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}
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