diff --git a/include/lib/aarch64/arch.h b/include/lib/aarch64/arch.h
index f85e789..9cbe405 100644
--- a/include/lib/aarch64/arch.h
+++ b/include/lib/aarch64/arch.h
@@ -502,9 +502,14 @@
 #define CNTACR_RWPT_SHIFT	U(0x5)
 
 /* PMCR_EL0 definitions */
+#define PMCR_EL0_RESET_VAL	U(0x0)
 #define PMCR_EL0_N_SHIFT	U(11)
 #define PMCR_EL0_N_MASK		U(0x1f)
 #define PMCR_EL0_N_BITS		(PMCR_EL0_N_MASK << PMCR_EL0_N_SHIFT)
+#define PMCR_EL0_LC_BIT		(U(1) << 6)
+#define PMCR_EL0_DP_BIT		(U(1) << 5)
+#define PMCR_EL0_X_BIT		(U(1) << 4)
+#define PMCR_EL0_D_BIT		(U(1) << 3)
 
 /*******************************************************************************
  * Definitions of MAIR encodings for device and normal memory
diff --git a/include/lib/aarch64/arch_helpers.h b/include/lib/aarch64/arch_helpers.h
index 0d0d7d3..684a0de 100644
--- a/include/lib/aarch64/arch_helpers.h
+++ b/include/lib/aarch64/arch_helpers.h
@@ -307,7 +307,7 @@
 DEFINE_SYSREG_RW_FUNCS(mdcr_el2)
 DEFINE_SYSREG_RW_FUNCS(hstr_el2)
 DEFINE_SYSREG_RW_FUNCS(cnthp_ctl_el2)
-DEFINE_SYSREG_READ_FUNC(pmcr_el0)
+DEFINE_SYSREG_RW_FUNCS(pmcr_el0)
 
 DEFINE_RENAME_SYSREG_RW_FUNCS(icc_sre_el1, ICC_SRE_EL1)
 DEFINE_RENAME_SYSREG_RW_FUNCS(icc_sre_el2, ICC_SRE_EL2)