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/** @file
Library that implements the Arm CCA helper functions.
Copyright (c) 2022 - 2026, Arm Ltd. All rights reserved.<BR>
SPDX-License-Identifier: BSD-2-Clause-Patent
- Rsi or RSI - Realm Service Interface
- IPA - Intermediate Physical Address
- RIPAS - Realm IPA state
**/
#pragma once
#include <Base.h>
#include <Uefi/UefiBaseType.h>
/**
Check if running in a Realm.
@retval TRUE The execution is within the context of a Realm.
@retval FALSE The execution is not within the context of a Realm.
**/
BOOLEAN
EFIAPI
ArmCcaIsRealm (
VOID
);
/**
Return the IPA width of the Realm.
The IPA width of the Realm is used to configure the protection attribute
for memory regions, see ArmCcaSetMemoryProtectionAttribute().
@param [out] IpaWidth IPA width of the Realm.
@retval RETURN_SUCCESS Success.
@retval RETURN_INVALID_PARAMETER A parameter is invalid.
@retval RETURN_UNSUPPORTED The execution is not within the
context of a Realm.
@retval RETURN_OUT_OF_RESOURCES Out of resources.
**/
RETURN_STATUS
EFIAPI
ArmCcaGetIpaWidth (
OUT UINT64 *IpaWidth
);
/** Check if the address range is protected MMIO
@param [in] BaseAddress Base address of the device MMIO region.
@param [in] Length Length of the device MMIO region.
@param [out] IsProtectedMmio TRUE - if the RIPAS for the address range is
protected MMIO.
FALSE - if the RIPAS for the address range is
not protected MMIO.
@retval RETURN_SUCCESS Success.
@retval RETURN_INVALID_PARAMETER A parameter is invalid.
@retval RETURN_UNSUPPORTED The request is not initiated in a
Realm.
**/
RETURN_STATUS
EFIAPI
ArmCcaMemRangeIsProtectedMmio (
IN UINT64 BaseAddress,
IN UINT64 Length,
OUT BOOLEAN *IsProtectedMmio
);
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