diff --git a/plat/arm/board/a5ds/a5ds_pm.c b/plat/arm/board/a5ds/a5ds_pm.c
index 5fd443b..98de77d 100644
--- a/plat/arm/board/a5ds/a5ds_pm.c
+++ b/plat/arm/board/a5ds/a5ds_pm.c
@@ -6,19 +6,56 @@
 
 #include <lib/psci/psci.h>
 #include <plat/arm/common/plat_arm.h>
+#include <plat/common/platform.h>
+#include <drivers/arm/gicv2.h>
 
 /*******************************************************************************
+ * Platform handler called when a power domain is about to be turned on. The
+ * mpidr determines the CPU to be turned on.
+ ******************************************************************************/
+static int a5ds_pwr_domain_on(u_register_t mpidr)
+{
+	unsigned int pos = plat_core_pos_by_mpidr(mpidr);
+	uint64_t *hold_base = (uint64_t *)A5DS_HOLD_BASE;
+
+	hold_base[pos] = A5DS_HOLD_STATE_GO;
+	dsbish();
+	sev();
+
+	return PSCI_E_SUCCESS;
+}
+
+/*******************************************************************************
+ * Platform handler called when a power domain has just been powered on after
+ * being turned off earlier. The target_state encodes the low power state that
+ * each level has woken up from.
+ ******************************************************************************/
+void a5ds_pwr_domain_on_finish(const psci_power_state_t *target_state)
+{
+	/* TODO: This setup is needed only after a cold boot*/
+	gicv2_pcpu_distif_init();
+
+	/* Enable the gic cpu interface */
+	gicv2_cpuif_enable();
+}
+
+/*******************************************************************************
  * Export the platform handlers via a5ds_psci_pm_ops. The ARM Standard
  * platform layer will take care of registering the handlers with PSCI.
  ******************************************************************************/
 plat_psci_ops_t a5ds_psci_pm_ops = {
 	/* dummy struct */
 	.validate_ns_entrypoint = NULL,
+	.pwr_domain_on = a5ds_pwr_domain_on,
+	.pwr_domain_on_finish = a5ds_pwr_domain_on_finish
 };
 
 int __init plat_setup_psci_ops(uintptr_t sec_entrypoint,
 				const plat_psci_ops_t **psci_ops)
 {
+	uintptr_t *mailbox = (void *)A5DS_TRUSTED_MAILBOX_BASE;
+	*mailbox = sec_entrypoint;
+
 	*psci_ops = &a5ds_psci_pm_ops;
 
 	return 0;
diff --git a/plat/arm/board/a5ds/include/platform_def.h b/plat/arm/board/a5ds/include/platform_def.h
index 13c1934..e9e4b9a 100644
--- a/plat/arm/board/a5ds/include/platform_def.h
+++ b/plat/arm/board/a5ds/include/platform_def.h
@@ -97,9 +97,9 @@
 /* Default number of threads per CPU on A5DS */
 #define A5DS_MAX_PE_PER_CPU	1
 
-#define A5DS_CORE_COUNT 1
+#define A5DS_CORE_COUNT		4
 
-#define A5DS_PRIMARY_CPU			0x0
+#define A5DS_PRIMARY_CPU	0x0
 
 #define FLASH1_BASE			UL(0x8000000)
 #define FLASH1_SIZE			UL(0x2800000)
@@ -229,11 +229,11 @@
 #define BL32_LIMIT			(ARM_BL_RAM_BASE + ARM_BL_RAM_SIZE)
 
 /* Required platform porting definitions */
-#define PLATFORM_CORE_COUNT 1
-#define PLAT_NUM_PWR_DOMAINS		(A5DS_CLUSTER_COUNT + \
+#define PLATFORM_CORE_COUNT	A5DS_CORE_COUNT
+#define PLAT_NUM_PWR_DOMAINS	(A5DS_CLUSTER_COUNT + \
 					PLATFORM_CORE_COUNT) + 1
 
-#define PLAT_MAX_PWR_LVL		2
+#define PLAT_MAX_PWR_LVL	2
 
 /*
  * Other platform porting definitions are provided by included headers