• Home
  • Line#
  • Scopes#
  • Navigate#
  • Raw
  • Download
1 /*
2  * Copyright (c) 2024, 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 
debugv8p9_extended_bp_wp_enable(cpu_context_t * ctx)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 = read_ctx_reg(state, CTX_MDCR_EL3);
16 
17 	/* When FEAT_Debugv8p9 is implemented:
18 	 *
19 	 * MDCR_EL3.EBWE: Set to 0b1
20 	 * Enables use of additional breakpoints or watchpoints,
21 	 * and disables trap to EL3 on accesses to debug register.
22 	 */
23 
24 	mdcr_el3_val |= MDCR_EBWE_BIT;
25 	write_ctx_reg(state, CTX_MDCR_EL3, mdcr_el3_val);
26 }
27