diff --git a/services/std_svc/psci/psci_common.c b/services/std_svc/psci/psci_common.c
index 155f842..c984e9e 100644
--- a/services/std_svc/psci/psci_common.c
+++ b/services/std_svc/psci/psci_common.c
@@ -246,7 +246,8 @@
 	for (level = start_afflvl; level <= end_afflvl; level++) {
 		if (mpidr_nodes[level] == NULL)
 			continue;
-		bakery_lock_get(&mpidr_nodes[level]->lock);
+
+		psci_lock_get(mpidr_nodes[level]);
 	}
 }
 
@@ -264,7 +265,8 @@
 	for (level = end_afflvl; level >= start_afflvl; level--) {
 		if (mpidr_nodes[level] == NULL)
 			continue;
-		bakery_lock_release(&mpidr_nodes[level]->lock);
+
+		psci_lock_release(mpidr_nodes[level]);
 	}
 }
 
diff --git a/services/std_svc/psci/psci_private.h b/services/std_svc/psci/psci_private.h
index 24a5604..9a8ef73 100644
--- a/services/std_svc/psci/psci_private.h
+++ b/services/std_svc/psci/psci_private.h
@@ -33,14 +33,22 @@
 
 #include <arch.h>
 #include <bakery_lock.h>
-#include <platform_def.h>	/* for PLATFORM_NUM_AFFS */
 #include <psci.h>
 
-/* Number of affinity instances whose state this psci imp. can track */
-#ifdef PLATFORM_NUM_AFFS
-#define PSCI_NUM_AFFS		PLATFORM_NUM_AFFS
+/*
+ * The following helper macros abstract the interface to the Bakery
+ * Lock API.
+ */
+#if USE_COHERENT_MEM
+#define psci_lock_init(aff_map, idx)	bakery_lock_init(&(aff_map)[(idx)].lock)
+#define psci_lock_get(node)		bakery_lock_get(&((node)->lock))
+#define psci_lock_release(node)		bakery_lock_release(&((node)->lock))
 #else
-#define PSCI_NUM_AFFS		(2 * PLATFORM_CORE_COUNT)
+#define psci_lock_init(aff_map, idx)	((aff_map)[(idx)].aff_map_index = (idx))
+#define psci_lock_get(node)		bakery_lock_get((node)->aff_map_index,	  \
+						CPU_DATA_PSCI_LOCK_OFFSET)
+#define psci_lock_release(node)		bakery_lock_release((node)->aff_map_index,\
+						CPU_DATA_PSCI_LOCK_OFFSET)
 #endif
 
 /*******************************************************************************
@@ -49,10 +57,15 @@
  ******************************************************************************/
 typedef struct aff_map_node {
 	unsigned long mpidr;
-	unsigned short ref_count;
+	unsigned char ref_count;
 	unsigned char state;
 	unsigned char level;
+#if USE_COHERENT_MEM
 	bakery_lock_t lock;
+#else
+	/* For indexing the bakery_info array in per CPU data */
+	unsigned char aff_map_index;
+#endif
 } aff_map_node_t;
 
 typedef struct aff_limits_node {
diff --git a/services/std_svc/psci/psci_setup.c b/services/std_svc/psci/psci_setup.c
index e0bc833..a750256 100644
--- a/services/std_svc/psci/psci_setup.c
+++ b/services/std_svc/psci/psci_setup.c
@@ -181,7 +181,7 @@
 	uint32_t linear_id;
 	psci_aff_map[idx].mpidr = mpidr;
 	psci_aff_map[idx].level = level;
-	bakery_lock_init(&psci_aff_map[idx].lock);
+	psci_lock_init(psci_aff_map, idx);
 
 	/*
 	 * If an affinity instance is present then mark it as OFF to begin with.