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83271d5a5a
This patch enables FEAT_Debugv8p9 and prevents EL1/0 from trapping to EL3 when accessing MDSELR_EL1 register by setting the MDCR_EL3.EBWE bit. Signed-off-by: Arvind Ram Prakash <arvind.ramprakash@arm.com> Change-Id: I3613af1dd8cb8c0d3c33dc959f170846c0b9695a
26 lines
672 B
C
26 lines
672 B
C
/*
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* Copyright (c) 2024, 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/debug_v8p9.h>
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void debugv8p9_extended_bp_wp_enable(cpu_context_t *ctx)
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{
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el3_state_t *state = get_el3state_ctx(ctx);
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u_register_t mdcr_el3_val = read_ctx_reg(state, CTX_MDCR_EL3);
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/* When FEAT_Debugv8p9 is implemented:
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*
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* MDCR_EL3.EBWE: Set to 0b1
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* Enables use of additional breakpoints or watchpoints,
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* and disables trap to EL3 on accesses to debug register.
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*/
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mdcr_el3_val |= MDCR_EBWE_BIT;
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write_ctx_reg(state, CTX_MDCR_EL3, mdcr_el3_val);
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}
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