1 /*
2  * Copyright (c) 2021, Arm Limited. All rights reserved.
3  *
4  * SPDX-License-Identifier: BSD-3-Clause
5  */
6 
7 #include <stdbool.h>
8 
9 #include <arch.h>
10 #include <arch_helpers.h>
11 #include <lib/extensions/trf.h>
12 
trf_supported(void)13 static bool trf_supported(void)
14 {
15 	uint32_t features;
16 
17 	features = read_id_dfr0() >> ID_DFR0_TRACEFILT_SHIFT;
18 	return ((features & ID_DFR0_TRACEFILT_MASK) ==
19 		ID_DFR0_TRACEFILT_SUPPORTED);
20 }
21 
trf_enable(void)22 void trf_enable(void)
23 {
24 	uint32_t val;
25 
26 	if (trf_supported()) {
27 		/*
28 		 * Allow access of trace filter control registers from
29 		 * non-monitor mode
30 		 */
31 		val = read_sdcr();
32 		val &= ~SDCR_TTRF_BIT;
33 		write_sdcr(val);
34 	}
35 }
36