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60d330dc4d
Combining the EL2 and EL3 enablement code necessitates that it must be called at el3_exit, which is the only place with enough context to make the decision of what needs to be set. Decouple them to allow them to be called from elsewhere. Signed-off-by: Boyan Karatotev <boyan.karatotev@arm.com> Change-Id: I147764c42771e7d4100699ec8fae98dac0a505c0
36 lines
703 B
C
36 lines
703 B
C
/*
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* Copyright (c) 2018-2023, Arm Limited and Contributors. All rights reserved.
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*
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* SPDX-License-Identifier: BSD-3-Clause
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*/
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#include <stdbool.h>
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#include <arch.h>
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#include <arch_features.h>
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#include <arch_helpers.h>
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#include <lib/extensions/mpam.h>
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void mpam_init_el3(void)
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{
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/*
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* Enable MPAM, and disable trapping to EL3 when lower ELs access their
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* own MPAM registers.
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*/
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write_mpam3_el3(MPAM3_EL3_MPAMEN_BIT);
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}
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/*
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* If EL2 is implemented but unused, disable trapping to EL2 when lower ELs
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* access their own MPAM registers.
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*/
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void mpam_init_el2_unused(void)
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{
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write_mpam2_el2(0ULL);
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if ((read_mpamidr_el1() & MPAMIDR_HAS_HCR_BIT) != 0U) {
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write_mpamhcr_el2(0ULL);
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}
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}
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