diff --git a/include/plat/arm/css/common/css_pm.h b/include/plat/arm/css/common/css_pm.h
index 3842875..0f92e60 100644
--- a/include/plat/arm/css/common/css_pm.h
+++ b/include/plat/arm/css/common/css_pm.h
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2015-2017, ARM Limited and Contributors. All rights reserved.
+ * Copyright (c) 2015-2018, ARM Limited and Contributors. All rights reserved.
  *
  * SPDX-License-Identifier: BSD-3-Clause
  */
@@ -33,4 +33,10 @@
 void css_get_sys_suspend_power_state(psci_power_state_t *req_state);
 int css_node_hw_state(u_register_t mpidr, unsigned int power_level);
 
+/*
+ * This mapping array has to be exported by the platform. Each element at
+ * a given index maps that core to an SCMI power domain.
+ */
+extern const uint32_t plat_css_core_pos_to_scmi_dmn_id_map[];
+
 #endif /* __CSS_PM_H__ */
diff --git a/plat/arm/board/juno/juno_err.c b/plat/arm/board/juno/juno_err.c
index 4682895..0fe7016 100644
--- a/plat/arm/board/juno/juno_err.c
+++ b/plat/arm/board/juno/juno_err.c
@@ -1,11 +1,12 @@
 /*
- * Copyright (c) 2015-2016, ARM Limited and Contributors. All rights reserved.
+ * Copyright (c) 2015-2018, ARM Limited and Contributors. All rights reserved.
  *
  * SPDX-License-Identifier: BSD-3-Clause
  */
 
 #include <arch_helpers.h>
 #include <errno.h>
+#include <platform.h>
 #include <v2m_def.h>
 
 #define V2M_SYS_NVFLAGS_ADDR		(V2M_SYSREGS_BASE + V2M_SYS_NVFLAGS)
diff --git a/plat/arm/board/juno/juno_topology.c b/plat/arm/board/juno/juno_topology.c
index b9412b1..5f031c8 100644
--- a/plat/arm/board/juno/juno_topology.c
+++ b/plat/arm/board/juno/juno_topology.c
@@ -1,11 +1,13 @@
 /*
- * Copyright (c) 2016, ARM Limited and Contributors. All rights reserved.
+ * Copyright (c) 2016-2018, ARM Limited and Contributors. All rights reserved.
  *
  * SPDX-License-Identifier: BSD-3-Clause
  */
 
 #include <arm_def.h>
+#include <css_pm.h>
 #include <plat_arm.h>
+#include <platform.h>
 #include "juno_def.h"
 
 /*
@@ -23,7 +25,7 @@
  * i.e. CLUSTER1 CPUs are allocated indices from 0 to 3 and the higher
  * indices for CLUSTER0 CPUs.
  */
-const unsigned char juno_power_domain_tree_desc[] = {
+static const unsigned char juno_power_domain_tree_desc[] = {
 	/* No of root nodes */
 	JUNO_PWR_DOMAINS_AT_MAX_PWR_LVL,
 	/* No of children for the root node */
diff --git a/plat/arm/board/juno/juno_trng.c b/plat/arm/board/juno/juno_trng.c
index 124821b..d9ad1d4 100644
--- a/plat/arm/board/juno/juno_trng.c
+++ b/plat/arm/board/juno/juno_trng.c
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2017, ARM Limited and Contributors. All rights reserved.
+ * Copyright (c) 2017-2018, ARM Limited and Contributors. All rights reserved.
  *
  * SPDX-License-Identifier: BSD-3-Clause
  */
@@ -8,6 +8,7 @@
 #include <mmio.h>
 #include <string.h>
 #include <utils_def.h>
+#include "juno_decl.h"
 #include "juno_def.h"
 
 #define NSAMPLE_CLOCKS	1 /* min 1 cycle, max 231 cycles */
diff --git a/plat/arm/css/common/css_bl1_setup.c b/plat/arm/css/common/css_bl1_setup.c
index 7a2a6ff..b1b275c 100644
--- a/plat/arm/css/common/css_bl1_setup.c
+++ b/plat/arm/css/common/css_bl1_setup.c
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2015, ARM Limited and Contributors. All rights reserved.
+ * Copyright (c) 2015-2018, ARM Limited and Contributors. All rights reserved.
  *
  * SPDX-License-Identifier: BSD-3-Clause
  */
@@ -7,6 +7,7 @@
 #include <bl_common.h>
 #include <debug.h>
 #include <plat_arm.h>
+#include <platform.h>
 #include <soc_css.h>
 
 void bl1_platform_setup(void)
diff --git a/plat/arm/css/common/css_bl2u_setup.c b/plat/arm/css/common/css_bl2u_setup.c
index d225151..4ceb5cd 100644
--- a/plat/arm/css/common/css_bl2u_setup.c
+++ b/plat/arm/css/common/css_bl2u_setup.c
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2015-2017, ARM Limited and Contributors. All rights reserved.
+ * Copyright (c) 2015-2018, ARM Limited and Contributors. All rights reserved.
  *
  * SPDX-License-Identifier: BSD-3-Clause
  */
@@ -7,6 +7,7 @@
 #include <bl_common.h>
 #include <debug.h>
 #include <plat_arm.h>
+#include <platform.h>
 #include "../drivers/scp/css_scp.h"
 
 /* Weak definition may be overridden in specific CSS based platform */
diff --git a/plat/arm/css/common/css_topology.c b/plat/arm/css/common/css_topology.c
index 9b114e2..bccf2c8 100644
--- a/plat/arm/css/common/css_topology.c
+++ b/plat/arm/css/common/css_topology.c
@@ -1,10 +1,11 @@
 /*
- * Copyright (c) 2015-2017, ARM Limited and Contributors. All rights reserved.
+ * Copyright (c) 2015-2018, ARM Limited and Contributors. All rights reserved.
  *
  * SPDX-License-Identifier: BSD-3-Clause
  */
 
 #include <plat_arm.h>
+#include <platform.h>
 
 #if ARM_PLAT_MT
 #pragma weak plat_arm_get_cpu_pe_count
diff --git a/plat/arm/css/drivers/scp/css_bom_bootloader.c b/plat/arm/css/drivers/scp/css_bom_bootloader.c
index a92ce6b..08d6fc5 100644
--- a/plat/arm/css/drivers/scp/css_bom_bootloader.c
+++ b/plat/arm/css/drivers/scp/css_bom_bootloader.c
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2014-2017, ARM Limited and Contributors. All rights reserved.
+ * Copyright (c) 2014-2018, ARM Limited and Contributors. All rights reserved.
  *
  * SPDX-License-Identifier: BSD-3-Clause
  */
@@ -12,6 +12,7 @@
 #include <stdint.h>
 #include "../scpi/css_mhu.h"
 #include "../scpi/css_scpi.h"
+#include "css_scp.h"
 
 /* ID of the MHU slot used for the BOM protocol */
 #define BOM_MHU_SLOT_ID		0
diff --git a/plat/arm/css/drivers/scp/css_pm_scmi.c b/plat/arm/css/drivers/scp/css_pm_scmi.c
index e29cd86..f8bc20c 100644
--- a/plat/arm/css/drivers/scp/css_pm_scmi.c
+++ b/plat/arm/css/drivers/scp/css_pm_scmi.c
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2017, ARM Limited and Contributors. All rights reserved.
+ * Copyright (c) 2017-2018, ARM Limited and Contributors. All rights reserved.
  *
  * SPDX-License-Identifier: BSD-3-Clause
  */
@@ -62,16 +62,10 @@
 } scmi_power_state_t;
 
 /*
- * This mapping array has to be exported by the platform. Each element at
- * a given index maps that core to an SCMI power domain.
- */
-extern uint32_t plat_css_core_pos_to_scmi_dmn_id_map[];
-
-/*
  * The global handle for invoking the SCMI driver APIs after the driver
  * has been initialized.
  */
-void *scmi_handle;
+static void *scmi_handle;
 
 /* The SCMI channel global object */
 static scmi_channel_t scmi_channel;
diff --git a/plat/arm/soc/common/soc_css_security.c b/plat/arm/soc/common/soc_css_security.c
index a8747f1..19bd76f 100644
--- a/plat/arm/soc/common/soc_css_security.c
+++ b/plat/arm/soc/common/soc_css_security.c
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2015, ARM Limited and Contributors. All rights reserved.
+ * Copyright (c) 2015-2018, ARM Limited and Contributors. All rights reserved.
  *
  * SPDX-License-Identifier: BSD-3-Clause
  */
@@ -8,6 +8,7 @@
 #include <mmio.h>
 #include <nic_400.h>
 #include <platform_def.h>
+#include <soc_css.h>
 #include <soc_css_def.h>
 
 void soc_css_init_nic400(void)