1 /*
2  * Copyright (c) 2024, Arm Limited and Contributors. All rights reserved.
3  *
4  * SPDX-License-Identifier: BSD-3-Clause
5  */
6 
7 /* Runtime C routines for errata workarounds and common routines */
8 
9 #include <arch.h>
10 #include <arch_helpers.h>
11 #include <cortex_a520.h>
12 #include <cortex_x4.h>
13 #include <cortex_a75.h>
14 #include <lib/cpus/cpu_ops.h>
15 #include <lib/cpus/errata.h>
16 
17 #if ERRATA_A520_2938996 || ERRATA_X4_2726228
check_if_affected_core(void)18 unsigned int check_if_affected_core(void)
19 {
20 	uint32_t midr_val = read_midr();
21 	long rev_var  = cpu_get_rev_var();
22 
23 	if (EXTRACT_PARTNUM(midr_val) == EXTRACT_PARTNUM(CORTEX_A520_MIDR)) {
24 		return check_erratum_cortex_a520_2938996(rev_var);
25 	} else if (EXTRACT_PARTNUM(midr_val) == EXTRACT_PARTNUM(CORTEX_X4_MIDR)) {
26 		return check_erratum_cortex_x4_2726228(rev_var);
27 	}
28 
29 	return ERRATA_NOT_APPLIES;
30 }
31 #endif
32 
33 #if ERRATA_A75_764081
errata_a75_764081_applies(void)34 bool errata_a75_764081_applies(void)
35 {
36 	long rev_var = cpu_get_rev_var();
37 	if (check_erratum_cortex_a75_764081(rev_var) == ERRATA_APPLIES) {
38 		return true;
39 	}
40 	return false;
41 }
42 #endif /* ERRATA_A75_764081 */
43