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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
26 lines
512 B
C
26 lines
512 B
C
/*
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* Copyright (c) 2022-2023, Arm Limited. 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 <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/brbe.h>
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void brbe_init_el3(void)
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{
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uint64_t val;
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/*
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* MDCR_EL3.SBRBE = 0b01
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*
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* Allows BRBE usage in non-secure world and prohibited in
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* secure world.
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*/
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val = read_mdcr_el3();
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val &= ~(MDCR_SBRBE_MASK << MDCR_SBRBE_SHIFT);
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val |= (0x1UL << MDCR_SBRBE_SHIFT);
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write_mdcr_el3(val);
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}
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