diff --git a/include/lib/aarch64/arch.h b/include/lib/aarch64/arch.h
index bef6032..a034ae2 100644
--- a/include/lib/aarch64/arch.h
+++ b/include/lib/aarch64/arch.h
@@ -411,4 +411,9 @@
 #define CNTACR_RWVT_SHIFT	0x4
 #define CNTACR_RWPT_SHIFT	0x5
 
+/* PMCR_EL0 definitions */
+#define PMCR_EL0_N_SHIFT	11
+#define PMCR_EL0_N_MASK		0x1f
+#define PMCR_EL0_N_BITS		(PMCR_EL0_N_MASK << PMCR_EL0_N_SHIFT)
+
 #endif /* __ARCH_H__ */
diff --git a/include/lib/aarch64/arch_helpers.h b/include/lib/aarch64/arch_helpers.h
index 4d936ad..37db031 100644
--- a/include/lib/aarch64/arch_helpers.h
+++ b/include/lib/aarch64/arch_helpers.h
@@ -279,6 +279,9 @@
 
 DEFINE_SYSREG_READ_FUNC(ctr_el0)
 
+DEFINE_SYSREG_RW_FUNCS(mdcr_el2)
+DEFINE_SYSREG_READ_FUNC(pmcr_el0)
+
 DEFINE_RENAME_SYSREG_RW_FUNCS(icc_sre_el1, ICC_SRE_EL1)
 DEFINE_RENAME_SYSREG_RW_FUNCS(icc_sre_el2, ICC_SRE_EL2)
 DEFINE_RENAME_SYSREG_RW_FUNCS(icc_sre_el3, ICC_SRE_EL3)