39 lines
787 B
C
39 lines
787 B
C
/*
|
|
* 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);
|
|
}
|
|
}
|
|
}
|