1 /* 2 * Copyright (c) 2025, Arm Limited. All rights reserved. 3 * 4 * SPDX-License-Identifier: BSD-3-Clause 5 */ 6 7 #include <arch.h> 8 #include <arch_features.h> 9 #include <arch_helpers.h> 10 #include <lib/extensions/debug_v8p9.h> 11 12 void debugv8p9_extended_bp_wp_enable(cpu_context_t *ctx) 13 { 14 el3_state_t *state = get_el3state_ctx(ctx); 15 u_register_t mdcr_el3_val; 16 17 if (read_brps_id_field() > 0U) { 18 mdcr_el3_val = read_ctx_reg(state, CTX_MDCR_EL3); 19 /* When FEAT_Debugv8p9 is implemented: 20 * 21 * MDCR_EL3.EBWE: Set to 0b1 22 * Enables use of additional breakpoints or watchpoints, 23 * and disables trap to EL3 on accesses to debug register. 24 */ 25 mdcr_el3_val |= MDCR_EBWE_BIT; 26 write_ctx_reg(state, CTX_MDCR_EL3, mdcr_el3_val); 27 } 28 } 29