diff --git a/plat/arm/css/sgi/include/sgi_base_platform_def.h b/plat/arm/css/sgi/include/sgi_base_platform_def.h
index 4afaae1..c0e6555 100644
--- a/plat/arm/css/sgi/include/sgi_base_platform_def.h
+++ b/plat/arm/css/sgi/include/sgi_base_platform_def.h
@@ -9,15 +9,14 @@
 
 #include <lib/utils_def.h>
 #include <lib/xlat_tables/xlat_tables_defs.h>
+#include <plat/arm/board/common/board_css_def.h>
+#include <plat/arm/board/common/v2m_def.h>
+#include <plat/arm/common/arm_def.h>
+#include <plat/arm/common/arm_spm_def.h>
+#include <plat/arm/css/common/css_def.h>
+#include <plat/arm/soc/common/soc_css_def.h>
 #include <plat/common/common_def.h>
 
-#include <arm_def.h>
-#include <arm_spm_def.h>
-#include <board_css_def.h>
-#include <css_def.h>
-#include <soc_css_def.h>
-#include <v2m_def.h>
-
 #define PLATFORM_CORE_COUNT		(PLAT_ARM_CLUSTER_COUNT *	\
 					CSS_SGI_MAX_CPUS_PER_CLUSTER * \
 					CSS_SGI_MAX_PE_PER_CPU)
diff --git a/plat/arm/css/sgi/sgi_bl31_setup.c b/plat/arm/css/sgi/sgi_bl31_setup.c
index 617a62b..5324482 100644
--- a/plat/arm/css/sgi/sgi_bl31_setup.c
+++ b/plat/arm/css/sgi/sgi_bl31_setup.c
@@ -10,8 +10,8 @@
 
 #include <common/bl_common.h>
 #include <common/debug.h>
+#include <plat/arm/common/plat_arm.h>
 
-#include <plat_arm.h>
 #include <sgi_ras.h>
 #include <sgi_variant.h>
 
diff --git a/plat/arm/css/sgi/sgi_image_load.c b/plat/arm/css/sgi/sgi_image_load.c
index e52124f..a2f10dc 100644
--- a/plat/arm/css/sgi/sgi_image_load.c
+++ b/plat/arm/css/sgi/sgi_image_load.c
@@ -9,9 +9,9 @@
 #include <arch_helpers.h>
 #include <common/debug.h>
 #include <common/desc_image_load.h>
+#include <plat/arm/common/plat_arm.h>
 #include <plat/common/platform.h>
 
-#include <plat_arm.h>
 #include <sgi_variant.h>
 
 /*******************************************************************************
diff --git a/plat/arm/css/sgi/sgi_plat.c b/plat/arm/css/sgi/sgi_plat.c
index 72cda7f..83ca30c 100644
--- a/plat/arm/css/sgi/sgi_plat.c
+++ b/plat/arm/css/sgi/sgi_plat.c
@@ -11,11 +11,10 @@
 #include <common/bl_common.h>
 #include <common/debug.h>
 #include <drivers/arm/ccn.h>
+#include <plat/arm/common/plat_arm.h>
 #include <plat/common/platform.h>
 #include <services/secure_partition.h>
 
-#include <plat_arm.h>
-
 #if USE_COHERENT_MEM
 /*
  * The next 2 constants identify the extents of the coherent memory region.
diff --git a/plat/arm/css/sgi/sgi_ras.c b/plat/arm/css/sgi/sgi_ras.c
index a6a32d1..0001ffd 100644
--- a/plat/arm/css/sgi/sgi_ras.c
+++ b/plat/arm/css/sgi/sgi_ras.c
@@ -10,12 +10,12 @@
 #include <bl31/interrupt_mgmt.h>
 #include <lib/el3_runtime/context_mgmt.h>
 #include <lib/extensions/ras.h>
+#include <plat/arm/common/arm_spm_def.h>
 #include <plat/common/platform.h>
 #include <services/mm_svc.h>
 #include <services/sdei.h>
 #include <services/spm_svc.h>
 
-#include <arm_spm_def.h>
 #include <sgi_ras.h>
 
 static int sgi_ras_intr_handler(const struct err_record_info *err_rec,
diff --git a/plat/arm/css/sgi/sgi_topology.c b/plat/arm/css/sgi/sgi_topology.c
index 2921c0c..dafaf40 100644
--- a/plat/arm/css/sgi/sgi_topology.c
+++ b/plat/arm/css/sgi/sgi_topology.c
@@ -4,7 +4,8 @@
  * SPDX-License-Identifier: BSD-3-Clause
  */
 
-#include <plat_arm.h>
+#include <plat/arm/common/plat_arm.h>
+
 #include <sgi_variant.h>
 
 /* Topology */