diff --git a/include/lib/cpus/aarch64/cortex_a520.h b/include/lib/cpus/aarch64/cortex_a520.h
index ed3401d..11ddea9 100644
--- a/include/lib/cpus/aarch64/cortex_a520.h
+++ b/include/lib/cpus/aarch64/cortex_a520.h
@@ -28,4 +28,15 @@
 #define CORTEX_A520_CPUPWRCTLR_EL1				S3_0_C15_C2_7
 #define CORTEX_A520_CPUPWRCTLR_EL1_CORE_PWRDN_BIT		U(1)
 
+#ifndef __ASSEMBLER__
+#if ERRATA_A520_2938996
+long  check_erratum_cortex_a520_2938996(long cpu_rev);
+#else
+static inline long  check_erratum_cortex_a520_2938996(long cpu_rev)
+{
+       return 0;
+}
+#endif /* ERRATA_A520_2938996 */
+#endif /* __ASSEMBLER__ */
+
 #endif /* CORTEX_A520_H */
diff --git a/include/lib/cpus/aarch64/cortex_x4.h b/include/lib/cpus/aarch64/cortex_x4.h
index d81c3ca..4b6af8b 100644
--- a/include/lib/cpus/aarch64/cortex_x4.h
+++ b/include/lib/cpus/aarch64/cortex_x4.h
@@ -34,4 +34,15 @@
 #define CORTEX_X4_CPUACTLR5_EL1				S3_0_C15_C8_0
 #define CORTEX_X4_CPUACTLR5_EL1_BIT_14			(ULL(1) << 14)
 
+#ifndef __ASSEMBLER__
+#if ERRATA_X4_2726228
+long check_erratum_cortex_x4_2726228(long cpu_rev);
+#else
+static inline long check_erratum_cortex_x4_2726228(long cpu_rev)
+{
+       return 0;
+}
+#endif /* ERRATA_X4_2726228 */
+#endif /* __ASSEMBLER__ */
+
 #endif /* CORTEX_X4_H */
diff --git a/include/lib/cpus/errata.h b/include/lib/cpus/errata.h
index 2080898..a8eb84c 100644
--- a/include/lib/cpus/errata.h
+++ b/include/lib/cpus/errata.h
@@ -25,12 +25,21 @@
 #define ERRATUM_MITIGATED	ERRATUM_CHOSEN + ERRATUM_CHOSEN_SIZE
 #define ERRATUM_ENTRY_SIZE	ERRATUM_MITIGATED + ERRATUM_MITIGATED_SIZE
 
+/* Errata status */
+#define ERRATA_NOT_APPLIES	0
+#define ERRATA_APPLIES		1
+#define ERRATA_MISSING		2
+
 #ifndef __ASSEMBLER__
 #include <lib/cassert.h>
 
 void print_errata_status(void);
 void errata_print_msg(unsigned int status, const char *cpu, const char *id);
 
+#if ERRATA_A520_2938996 || ERRATA_X4_2726228
+unsigned int check_if_affected_core(void);
+#endif
+
 /*
  * NOTE that this structure will be different on AArch32 and AArch64. The
  * uintptr_t will reflect the change and the alignment will be correct in both.
@@ -74,11 +83,6 @@
 
 #endif /* __ASSEMBLER__ */
 
-/* Errata status */
-#define ERRATA_NOT_APPLIES	0
-#define ERRATA_APPLIES		1
-#define ERRATA_MISSING		2
-
 /* Macro to get CPU revision code for checking errata version compatibility. */
 #define CPU_REV(r, p)		((r << 4) | p)