diff --git a/include/lib/aarch32/arch_helpers.h b/include/lib/aarch32/arch_helpers.h
index 5d9c1c1..03f0e86 100644
--- a/include/lib/aarch32/arch_helpers.h
+++ b/include/lib/aarch32/arch_helpers.h
@@ -4,8 +4,8 @@
  * SPDX-License-Identifier: BSD-3-Clause
  */
 
-#ifndef __ARCH_HELPERS_H__
-#define __ARCH_HELPERS_H__
+#ifndef ARCH_HELPERS_H
+#define ARCH_HELPERS_H
 
 #include <arch.h>	/* for additional register definitions */
 #include <cdefs.h>
@@ -381,4 +381,4 @@
 #define write_icc_sgi0r_el1(_v) \
 		write64_icc_sgi0r_el1(_v)
 
-#endif /* __ARCH_HELPERS_H__ */
+#endif /* ARCH_HELPERS_H */
diff --git a/include/lib/aarch64/arch_helpers.h b/include/lib/aarch64/arch_helpers.h
index d90061f..61f9830 100644
--- a/include/lib/aarch64/arch_helpers.h
+++ b/include/lib/aarch64/arch_helpers.h
@@ -4,11 +4,12 @@
  * SPDX-License-Identifier: BSD-3-Clause
  */
 
-#ifndef __ARCH_HELPERS_H__
-#define __ARCH_HELPERS_H__
+#ifndef ARCH_HELPERS_H
+#define ARCH_HELPERS_H
 
 #include <arch.h>	/* for additional register definitions */
 #include <cdefs.h>	/* For __dead2 */
+#include <stdbool.h>
 #include <stdint.h>
 #include <string.h>
 
@@ -363,12 +364,22 @@
 }
 
 /*
- * Check if an EL is implemented from AA64PFR0 register fields. 'el' argument
- * must be one of 1, 2 or 3.
+ * Check if an EL is implemented from AA64PFR0 register fields.
  */
-#define EL_IMPLEMENTED(el) \
-	((read_id_aa64pfr0_el1() >> ID_AA64PFR0_EL##el##_SHIFT) \
-		& ID_AA64PFR0_ELX_MASK)
+static inline uint64_t el_implemented(unsigned int el)
+{
+	if (el > 3U) {
+		return EL_IMPL_NONE;
+	} else {
+		unsigned int shift = ID_AA64PFR0_EL1_SHIFT * el;
+
+		return (read_id_aa64pfr0_el1() >> shift) & ID_AA64PFR0_ELX_MASK;
+	}
+}
+
+#if !ERROR_DEPRECATED
+#define EL_IMPLEMENTED(_el)	el_implemented(_el)
+#endif
 
 /* Previously defined accesor functions with incomplete register names  */
 
@@ -389,4 +400,4 @@
 #define read_cpacr()		read_cpacr_el1()
 #define write_cpacr(_v)		write_cpacr_el1(_v)
 
-#endif /* __ARCH_HELPERS_H__ */
+#endif /* ARCH_HELPERS_H */
diff --git a/include/lib/el3_runtime/aarch32/context.h b/include/lib/el3_runtime/aarch32/context.h
index 6447360..1ea19ca 100644
--- a/include/lib/el3_runtime/aarch32/context.h
+++ b/include/lib/el3_runtime/aarch32/context.h
@@ -1,26 +1,28 @@
 /*
- * 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
  */
 
-#ifndef __CONTEXT_H__
-#define __CONTEXT_H__
+#ifndef CONTEXT_H
+#define CONTEXT_H
+
+#include <utils_def.h>
 
 /*******************************************************************************
  * Constants that allow assembler code to access members of and the 'regs'
  * structure at their correct offsets.
  ******************************************************************************/
-#define CTX_REGS_OFFSET		0x0
-#define CTX_GPREG_R0		0x0
-#define CTX_GPREG_R1		0x4
-#define CTX_GPREG_R2		0x8
-#define CTX_GPREG_R3		0xC
-#define CTX_LR			0x10
-#define CTX_SCR			0x14
-#define CTX_SPSR		0x18
-#define CTX_NS_SCTLR		0x1C
-#define CTX_REGS_END		0x20
+#define CTX_REGS_OFFSET		U(0x0)
+#define CTX_GPREG_R0		U(0x0)
+#define CTX_GPREG_R1		U(0x4)
+#define CTX_GPREG_R2		U(0x8)
+#define CTX_GPREG_R3		U(0xC)
+#define CTX_LR			U(0x10)
+#define CTX_SCR			U(0x14)
+#define CTX_SPSR		U(0x18)
+#define CTX_NS_SCTLR		U(0x1C)
+#define CTX_REGS_END		U(0x20)
 
 #ifndef __ASSEMBLY__
 
@@ -31,7 +33,7 @@
  * Common constants to help define the 'cpu_context' structure and its
  * members below.
  */
-#define WORD_SHIFT		2
+#define WORD_SHIFT		U(2)
 #define DEFINE_REG_STRUCT(name, num_regs)	\
 	typedef struct name {			\
 		uint32_t _regs[num_regs];	\
@@ -64,4 +66,4 @@
 
 #endif /* __ASSEMBLY__ */
 
-#endif /* __CONTEXT_H__ */
+#endif /* CONTEXT_H */
diff --git a/include/lib/el3_runtime/aarch64/context.h b/include/lib/el3_runtime/aarch64/context.h
index b990674..8c5f4c6 100644
--- a/include/lib/el3_runtime/aarch64/context.h
+++ b/include/lib/el3_runtime/aarch64/context.h
@@ -4,8 +4,8 @@
  * SPDX-License-Identifier: BSD-3-Clause
  */
 
-#ifndef __CONTEXT_H__
-#define __CONTEXT_H__
+#ifndef CONTEXT_H
+#define CONTEXT_H
 
 #include <utils_def.h>
 
@@ -347,4 +347,4 @@
 
 #endif /* __ASSEMBLY__ */
 
-#endif /* __CONTEXT_H__ */
+#endif /* CONTEXT_H */
diff --git a/include/lib/el3_runtime/context_mgmt.h b/include/lib/el3_runtime/context_mgmt.h
index c5bbb2b..149ac3f 100644
--- a/include/lib/el3_runtime/context_mgmt.h
+++ b/include/lib/el3_runtime/context_mgmt.h
@@ -1,16 +1,15 @@
 /*
- * Copyright (c) 2013-2017, ARM Limited and Contributors. All rights reserved.
+ * Copyright (c) 2013-2018, ARM Limited and Contributors. All rights reserved.
  *
  * SPDX-License-Identifier: BSD-3-Clause
  */
 
-#ifndef __CM_H__
-#define __CM_H__
+#ifndef CONTEXT_MGMT_H
+#define CONTEXT_MGMT_H
 
 #include <arch.h>
 #include <assert.h>
 #include <context.h>
-#include <context_mgmt.h>
 #include <stdint.h>
 
 /*******************************************************************************
@@ -80,4 +79,4 @@
 void cm_set_next_context(void *context);
 #endif /* AARCH32 */
 
-#endif /* __CM_H__ */
+#endif /* CONTEXT_MGMT_H */
diff --git a/include/lib/el3_runtime/cpu_data.h b/include/lib/el3_runtime/cpu_data.h
index b695950..561f8be 100644
--- a/include/lib/el3_runtime/cpu_data.h
+++ b/include/lib/el3_runtime/cpu_data.h
@@ -144,9 +144,9 @@
 void init_cpu_ops(void);
 
 #define get_cpu_data(_m)		   _cpu_data()->_m
-#define set_cpu_data(_m, _v)		   _cpu_data()->_m = _v
+#define set_cpu_data(_m, _v)		   _cpu_data()->_m = (_v)
 #define get_cpu_data_by_index(_ix, _m)	   _cpu_data_by_index(_ix)->_m
-#define set_cpu_data_by_index(_ix, _m, _v) _cpu_data_by_index(_ix)->_m = _v
+#define set_cpu_data_by_index(_ix, _m, _v) _cpu_data_by_index(_ix)->_m = (_v)
 /* ((cpu_data_t *)0)->_m is a dummy to get the sizeof the struct member _m */
 #define flush_cpu_data(_m)	   flush_dcache_range((uintptr_t)	  \
 						&(_cpu_data()->_m), \