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/*
* Copyright (c) 2018-2022, ARM Limited and Contributors. All rights reserved.
*
* SPDX-License-Identifier: BSD-3-Clause
*/
#include <stdbool.h>
#include <arch.h>
#include <arch_features.h>
#include <arch_helpers.h>
#include <lib/extensions/mpam.h>
void mpam_enable(bool el2_unused)
{
/* Check if MPAM is implemented */
if (get_mpam_version() == 0U) {
return;
}
/*
* Enable MPAM, and disable trapping to EL3 when lower ELs access their
* own MPAM registers.
*/
write_mpam3_el3(MPAM3_EL3_MPAMEN_BIT);
/*
* If EL2 is implemented but unused, disable trapping to EL2 when lower
* ELs access their own MPAM registers.
*/
if (el2_unused) {
write_mpam2_el2(0ULL);
if ((read_mpamidr_el1() & MPAMIDR_HAS_HCR_BIT) != 0U) {
write_mpamhcr_el2(0ULL);
}
}
}
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