diff --git a/drivers/arm/gic/common/gic_common.c b/drivers/arm/gic/common/gic_common.c
index 07ed63d..589de5d 100644
--- a/drivers/arm/gic/common/gic_common.c
+++ b/drivers/arm/gic/common/gic_common.c
@@ -18,7 +18,8 @@
  */
 unsigned int gicd_read_igroupr(uintptr_t base, unsigned int id)
 {
-	unsigned n = id >> IGROUPR_SHIFT;
+	unsigned int n = id >> IGROUPR_SHIFT;
+
 	return mmio_read_32(base + GICD_IGROUPR + (n << 2));
 }
 
@@ -28,7 +29,8 @@
  */
 unsigned int gicd_read_isenabler(uintptr_t base, unsigned int id)
 {
-	unsigned n = id >> ISENABLER_SHIFT;
+	unsigned int n = id >> ISENABLER_SHIFT;
+
 	return mmio_read_32(base + GICD_ISENABLER + (n << 2));
 }
 
@@ -38,7 +40,8 @@
  */
 unsigned int gicd_read_icenabler(uintptr_t base, unsigned int id)
 {
-	unsigned n = id >> ICENABLER_SHIFT;
+	unsigned int n = id >> ICENABLER_SHIFT;
+
 	return mmio_read_32(base + GICD_ICENABLER + (n << 2));
 }
 
@@ -48,7 +51,8 @@
  */
 unsigned int gicd_read_ispendr(uintptr_t base, unsigned int id)
 {
-	unsigned n = id >> ISPENDR_SHIFT;
+	unsigned int n = id >> ISPENDR_SHIFT;
+
 	return mmio_read_32(base + GICD_ISPENDR + (n << 2));
 }
 
@@ -58,7 +62,8 @@
  */
 unsigned int gicd_read_icpendr(uintptr_t base, unsigned int id)
 {
-	unsigned n = id >> ICPENDR_SHIFT;
+	unsigned int n = id >> ICPENDR_SHIFT;
+
 	return mmio_read_32(base + GICD_ICPENDR + (n << 2));
 }
 
@@ -68,7 +73,8 @@
  */
 unsigned int gicd_read_isactiver(uintptr_t base, unsigned int id)
 {
-	unsigned n = id >> ISACTIVER_SHIFT;
+	unsigned int n = id >> ISACTIVER_SHIFT;
+
 	return mmio_read_32(base + GICD_ISACTIVER + (n << 2));
 }
 
@@ -78,7 +84,8 @@
  */
 unsigned int gicd_read_icactiver(uintptr_t base, unsigned int id)
 {
-	unsigned n = id >> ICACTIVER_SHIFT;
+	unsigned int n = id >> ICACTIVER_SHIFT;
+
 	return mmio_read_32(base + GICD_ICACTIVER + (n << 2));
 }
 
@@ -88,7 +95,8 @@
  */
 unsigned int gicd_read_ipriorityr(uintptr_t base, unsigned int id)
 {
-	unsigned n = id >> IPRIORITYR_SHIFT;
+	unsigned int n = id >> IPRIORITYR_SHIFT;
+
 	return mmio_read_32(base + GICD_IPRIORITYR + (n << 2));
 }
 
@@ -98,7 +106,8 @@
  */
 unsigned int gicd_read_icfgr(uintptr_t base, unsigned int id)
 {
-	unsigned n = id >> ICFGR_SHIFT;
+	unsigned int n = id >> ICFGR_SHIFT;
+
 	return mmio_read_32(base + GICD_ICFGR + (n << 2));
 }
 
@@ -108,7 +117,8 @@
  */
 unsigned int gicd_read_nsacr(uintptr_t base, unsigned int id)
 {
-	unsigned n = id >> NSACR_SHIFT;
+	unsigned int n = id >> NSACR_SHIFT;
+
 	return mmio_read_32(base + GICD_NSACR + (n << 2));
 }
 
@@ -121,7 +131,8 @@
  */
 void gicd_write_igroupr(uintptr_t base, unsigned int id, unsigned int val)
 {
-	unsigned n = id >> IGROUPR_SHIFT;
+	unsigned int n = id >> IGROUPR_SHIFT;
+
 	mmio_write_32(base + GICD_IGROUPR + (n << 2), val);
 }
 
@@ -131,7 +142,8 @@
  */
 void gicd_write_isenabler(uintptr_t base, unsigned int id, unsigned int val)
 {
-	unsigned n = id >> ISENABLER_SHIFT;
+	unsigned int n = id >> ISENABLER_SHIFT;
+
 	mmio_write_32(base + GICD_ISENABLER + (n << 2), val);
 }
 
@@ -141,7 +153,8 @@
  */
 void gicd_write_icenabler(uintptr_t base, unsigned int id, unsigned int val)
 {
-	unsigned n = id >> ICENABLER_SHIFT;
+	unsigned int n = id >> ICENABLER_SHIFT;
+
 	mmio_write_32(base + GICD_ICENABLER + (n << 2), val);
 }
 
@@ -151,7 +164,8 @@
  */
 void gicd_write_ispendr(uintptr_t base, unsigned int id, unsigned int val)
 {
-	unsigned n = id >> ISPENDR_SHIFT;
+	unsigned int n = id >> ISPENDR_SHIFT;
+
 	mmio_write_32(base + GICD_ISPENDR + (n << 2), val);
 }
 
@@ -161,7 +175,8 @@
  */
 void gicd_write_icpendr(uintptr_t base, unsigned int id, unsigned int val)
 {
-	unsigned n = id >> ICPENDR_SHIFT;
+	unsigned int n = id >> ICPENDR_SHIFT;
+
 	mmio_write_32(base + GICD_ICPENDR + (n << 2), val);
 }
 
@@ -171,7 +186,8 @@
  */
 void gicd_write_isactiver(uintptr_t base, unsigned int id, unsigned int val)
 {
-	unsigned n = id >> ISACTIVER_SHIFT;
+	unsigned int n = id >> ISACTIVER_SHIFT;
+
 	mmio_write_32(base + GICD_ISACTIVER + (n << 2), val);
 }
 
@@ -181,7 +197,8 @@
  */
 void gicd_write_icactiver(uintptr_t base, unsigned int id, unsigned int val)
 {
-	unsigned n = id >> ICACTIVER_SHIFT;
+	unsigned int n = id >> ICACTIVER_SHIFT;
+
 	mmio_write_32(base + GICD_ICACTIVER + (n << 2), val);
 }
 
@@ -191,7 +208,8 @@
  */
 void gicd_write_ipriorityr(uintptr_t base, unsigned int id, unsigned int val)
 {
-	unsigned n = id >> IPRIORITYR_SHIFT;
+	unsigned int n = id >> IPRIORITYR_SHIFT;
+
 	mmio_write_32(base + GICD_IPRIORITYR + (n << 2), val);
 }
 
@@ -201,7 +219,8 @@
  */
 void gicd_write_icfgr(uintptr_t base, unsigned int id, unsigned int val)
 {
-	unsigned n = id >> ICFGR_SHIFT;
+	unsigned int n = id >> ICFGR_SHIFT;
+
 	mmio_write_32(base + GICD_ICFGR + (n << 2), val);
 }
 
@@ -211,7 +230,8 @@
  */
 void gicd_write_nsacr(uintptr_t base, unsigned int id, unsigned int val)
 {
-	unsigned n = id >> NSACR_SHIFT;
+	unsigned int n = id >> NSACR_SHIFT;
+
 	mmio_write_32(base + GICD_NSACR + (n << 2), val);
 }
 
@@ -223,87 +243,89 @@
  ******************************************************************************/
 unsigned int gicd_get_igroupr(uintptr_t base, unsigned int id)
 {
-	unsigned bit_num = id & ((1 << IGROUPR_SHIFT) - 1);
+	unsigned int bit_num = id & ((1U << IGROUPR_SHIFT) - 1U);
 	unsigned int reg_val = gicd_read_igroupr(base, id);
 
-	return (reg_val >> bit_num) & 0x1;
+	return (reg_val >> bit_num) & 0x1U;
 }
 
 void gicd_set_igroupr(uintptr_t base, unsigned int id)
 {
-	unsigned bit_num = id & ((1 << IGROUPR_SHIFT) - 1);
+	unsigned int bit_num = id & ((1U << IGROUPR_SHIFT) - 1U);
 	unsigned int reg_val = gicd_read_igroupr(base, id);
 
-	gicd_write_igroupr(base, id, reg_val | (1 << bit_num));
+	gicd_write_igroupr(base, id, reg_val | (1U << bit_num));
 }
 
 void gicd_clr_igroupr(uintptr_t base, unsigned int id)
 {
-	unsigned bit_num = id & ((1 << IGROUPR_SHIFT) - 1);
+	unsigned int bit_num = id & ((1U << IGROUPR_SHIFT) - 1U);
 	unsigned int reg_val = gicd_read_igroupr(base, id);
 
-	gicd_write_igroupr(base, id, reg_val & ~(1 << bit_num));
+	gicd_write_igroupr(base, id, reg_val & ~(1U << bit_num));
 }
 
 void gicd_set_isenabler(uintptr_t base, unsigned int id)
 {
-	unsigned bit_num = id & ((1 << ISENABLER_SHIFT) - 1);
+	unsigned int bit_num = id & ((1U << ISENABLER_SHIFT) - 1U);
 
-	gicd_write_isenabler(base, id, (1 << bit_num));
+	gicd_write_isenabler(base, id, (1U << bit_num));
 }
 
 void gicd_set_icenabler(uintptr_t base, unsigned int id)
 {
-	unsigned bit_num = id & ((1 << ICENABLER_SHIFT) - 1);
+	unsigned int bit_num = id & ((1U << ICENABLER_SHIFT) - 1U);
 
-	gicd_write_icenabler(base, id, (1 << bit_num));
+	gicd_write_icenabler(base, id, (1U << bit_num));
 }
 
 void gicd_set_ispendr(uintptr_t base, unsigned int id)
 {
-	unsigned bit_num = id & ((1 << ISPENDR_SHIFT) - 1);
+	unsigned int bit_num = id & ((1U << ISPENDR_SHIFT) - 1U);
 
-	gicd_write_ispendr(base, id, (1 << bit_num));
+	gicd_write_ispendr(base, id, (1U << bit_num));
 }
 
 void gicd_set_icpendr(uintptr_t base, unsigned int id)
 {
-	unsigned bit_num = id & ((1 << ICPENDR_SHIFT) - 1);
+	unsigned int bit_num = id & ((1U << ICPENDR_SHIFT) - 1U);
 
-	gicd_write_icpendr(base, id, (1 << bit_num));
+	gicd_write_icpendr(base, id, (1U << bit_num));
 }
 
 unsigned int gicd_get_isactiver(uintptr_t base, unsigned int id)
 {
-	unsigned int bit_num = id & ((1 << ISACTIVER_SHIFT) - 1);
+	unsigned int bit_num = id & ((1U << ISACTIVER_SHIFT) - 1U);
 	unsigned int reg_val = gicd_read_isactiver(base, id);
 
-	return (reg_val >> bit_num) & 0x1;
+	return (reg_val >> bit_num) & 0x1U;
 }
 
 void gicd_set_isactiver(uintptr_t base, unsigned int id)
 {
-	unsigned bit_num = id & ((1 << ISACTIVER_SHIFT) - 1);
+	unsigned int bit_num = id & ((1U << ISACTIVER_SHIFT) - 1U);
 
-	gicd_write_isactiver(base, id, (1 << bit_num));
+	gicd_write_isactiver(base, id, (1U << bit_num));
 }
 
 void gicd_set_icactiver(uintptr_t base, unsigned int id)
 {
-	unsigned bit_num = id & ((1 << ICACTIVER_SHIFT) - 1);
+	unsigned int bit_num = id & ((1U << ICACTIVER_SHIFT) - 1U);
 
-	gicd_write_icactiver(base, id, (1 << bit_num));
+	gicd_write_icactiver(base, id, (1U << bit_num));
 }
 
 void gicd_set_ipriorityr(uintptr_t base, unsigned int id, unsigned int pri)
 {
-	mmio_write_8(base + GICD_IPRIORITYR + id, pri & GIC_PRI_MASK);
+	uint8_t val = pri & GIC_PRI_MASK;
+
+	mmio_write_8(base + GICD_IPRIORITYR + id, val);
 }
 
 void gicd_set_icfgr(uintptr_t base, unsigned int id, unsigned int cfg)
 {
 	/* Interrupt configuration is a 2-bit field */
-	unsigned int bit_num = id & ((1 << ICFGR_SHIFT) - 1);
+	unsigned int bit_num = id & ((1U << ICFGR_SHIFT) - 1U);
 	unsigned int bit_shift = bit_num << 1;
 
 	uint32_t reg_val = gicd_read_icfgr(base, id);
diff --git a/drivers/arm/gic/v2/gicv2_helpers.c b/drivers/arm/gic/v2/gicv2_helpers.c
index 421669f..221f1b5 100644
--- a/drivers/arm/gic/v2/gicv2_helpers.c
+++ b/drivers/arm/gic/v2/gicv2_helpers.c
@@ -94,24 +94,24 @@
 
 	num_ints = gicd_read_typer(gicd_base);
 	num_ints &= TYPER_IT_LINES_NO_MASK;
-	num_ints = (num_ints + 1) << 5;
+	num_ints = (num_ints + 1U) << 5;
 
 	/*
 	 * Treat all SPIs as G1NS by default. The number of interrupts is
 	 * calculated as 32 * (IT_LINES + 1). We do 32 at a time.
 	 */
-	for (index = MIN_SPI_ID; index < num_ints; index += 32)
+	for (index = MIN_SPI_ID; index < num_ints; index += 32U)
 		gicd_write_igroupr(gicd_base, index, ~0U);
 
 	/* Setup the default SPI priorities doing four at a time */
-	for (index = MIN_SPI_ID; index < num_ints; index += 4)
+	for (index = MIN_SPI_ID; index < num_ints; index += 4U)
 		gicd_write_ipriorityr(gicd_base,
 				      index,
 				      GICD_IPRIORITYR_DEF_VAL);
 
 	/* Treat all SPIs as level triggered by default, 16 at a time */
-	for (index = MIN_SPI_ID; index < num_ints; index += 16)
-		gicd_write_icfgr(gicd_base, index, 0);
+	for (index = MIN_SPI_ID; index < num_ints; index += 16U)
+		gicd_write_icfgr(gicd_base, index, 0U);
 }
 
 #if !ERROR_DEPRECATED
@@ -125,7 +125,8 @@
 	unsigned int index, irq_num;
 
 	/* If `num_ints` is not 0, ensure that `sec_intr_list` is not NULL */
-	assert(num_ints ? (uintptr_t)sec_intr_list : 1);
+	if (num_ints != 0U)
+		assert(sec_intr_list != NULL);
 
 	for (index = 0; index < num_ints; index++) {
 		irq_num = sec_intr_list[index];
@@ -161,7 +162,8 @@
 	const interrupt_prop_t *prop_desc;
 
 	/* Make sure there's a valid property array */
-	assert(interrupt_props_num != 0 ? (uintptr_t) interrupt_props : 1);
+	if (interrupt_props_num != 0U)
+		assert(interrupt_props != NULL);
 
 	for (i = 0; i < interrupt_props_num; i++) {
 		prop_desc = &interrupt_props[i];
@@ -252,20 +254,21 @@
 	const interrupt_prop_t *prop_desc;
 
 	/* Make sure there's a valid property array */
-	assert(interrupt_props_num != 0 ? (uintptr_t) interrupt_props : 1);
+	if (interrupt_props_num != 0U)
+		assert(interrupt_props != NULL);
 
 	/*
 	 * Disable all SGIs (imp. def.)/PPIs before configuring them. This is a
 	 * more scalable approach as it avoids clearing the enable bits in the
 	 * GICD_CTLR.
 	 */
-	gicd_write_icenabler(gicd_base, 0, ~0);
+	gicd_write_icenabler(gicd_base, 0U, ~0U);
 
 	/* Setup the default PPI/SGI priorities doing four at a time */
-	for (i = 0; i < MIN_SPI_ID; i += 4)
+	for (i = 0U; i < MIN_SPI_ID; i += 4U)
 		gicd_write_ipriorityr(gicd_base, i, GICD_IPRIORITYR_DEF_VAL);
 
-	for (i = 0; i < interrupt_props_num; i++) {
+	for (i = 0U; i < interrupt_props_num; i++) {
 		prop_desc = &interrupt_props[i];
 
 		if (prop_desc->intr_num >= MIN_SPI_ID)
diff --git a/drivers/arm/gic/v2/gicv2_main.c b/drivers/arm/gic/v2/gicv2_main.c
index 7cf6c76..311e77e 100644
--- a/drivers/arm/gic/v2/gicv2_main.c
+++ b/drivers/arm/gic/v2/gicv2_main.c
@@ -12,6 +12,8 @@
 #include <gicv2.h>
 #include <interrupt_props.h>
 #include <spinlock.h>
+#include <stdbool.h>
+
 #include "../common/gic_common_private.h"
 #include "gicv2_private.h"
 
@@ -32,8 +34,8 @@
 {
 	unsigned int val;
 
-	assert(driver_data);
-	assert(driver_data->gicc_base);
+	assert(driver_data != NULL);
+	assert(driver_data->gicc_base != 0U);
 
 	/*
 	 * Enable the Group 0 interrupts, FIQEn and disable Group 0/1
@@ -55,8 +57,8 @@
 {
 	unsigned int val;
 
-	assert(driver_data);
-	assert(driver_data->gicc_base);
+	assert(driver_data != NULL);
+	assert(driver_data->gicc_base != 0U);
 
 	/* Disable secure, non-secure interrupts and disable their bypass */
 	val = gicc_read_ctlr(driver_data->gicc_base);
@@ -74,8 +76,8 @@
 {
 	unsigned int ctlr;
 
-	assert(driver_data);
-	assert(driver_data->gicd_base);
+	assert(driver_data != NULL);
+	assert(driver_data->gicd_base != 0U);
 
 #if !ERROR_DEPRECATED
 	if (driver_data->interrupt_props != NULL) {
@@ -101,7 +103,7 @@
 
 	/* Enable G0 interrupts if not already */
 	ctlr = gicd_read_ctlr(driver_data->gicd_base);
-	if ((ctlr & CTLR_ENABLE_G0_BIT) == 0) {
+	if ((ctlr & CTLR_ENABLE_G0_BIT) == 0U) {
 		gicd_write_ctlr(driver_data->gicd_base,
 				ctlr | CTLR_ENABLE_G0_BIT);
 	}
@@ -116,8 +118,8 @@
 {
 	unsigned int ctlr;
 
-	assert(driver_data);
-	assert(driver_data->gicd_base);
+	assert(driver_data != NULL);
+	assert(driver_data->gicd_base != 0U);
 
 	/* Disable the distributor before going further */
 	ctlr = gicd_read_ctlr(driver_data->gicd_base);
@@ -162,9 +164,10 @@
 void gicv2_driver_init(const gicv2_driver_data_t *plat_driver_data)
 {
 	unsigned int gic_version;
-	assert(plat_driver_data);
-	assert(plat_driver_data->gicd_base);
-	assert(plat_driver_data->gicc_base);
+
+	assert(plat_driver_data != NULL);
+	assert(plat_driver_data->gicd_base != 0U);
+	assert(plat_driver_data->gicc_base != 0U);
 
 #if !ERROR_DEPRECATED
 	if (plat_driver_data->interrupt_props == NULL) {
@@ -212,7 +215,8 @@
 	 * - interrupt priority drop.
 	 * - interrupt signal bypass.
 	 */
-	assert(gic_version == ARCH_REV_GICV2 || gic_version == ARCH_REV_GICV1);
+	assert((gic_version == ARCH_REV_GICV2) ||
+	       (gic_version == ARCH_REV_GICV1));
 
 	driver_data = plat_driver_data;
 
@@ -238,11 +242,11 @@
 {
 	unsigned int gicc_ctlr;
 
-	assert(driver_data);
-	assert(driver_data->gicc_base);
+	assert(driver_data != NULL);
+	assert(driver_data->gicc_base != 0U);
 
 	gicc_ctlr = gicc_read_ctlr(driver_data->gicc_base);
-	return (gicc_ctlr >> FIQ_EN_SHIFT) & 0x1;
+	return (gicc_ctlr >> FIQ_EN_SHIFT) & 0x1U;
 }
 
 /*******************************************************************************
@@ -255,8 +259,8 @@
  ******************************************************************************/
 unsigned int gicv2_get_pending_interrupt_type(void)
 {
-	assert(driver_data);
-	assert(driver_data->gicc_base);
+	assert(driver_data != NULL);
+	assert(driver_data->gicc_base != 0U);
 
 	return gicc_read_hppir(driver_data->gicc_base) & INT_ID_MASK;
 }
@@ -270,8 +274,8 @@
 {
 	unsigned int id;
 
-	assert(driver_data);
-	assert(driver_data->gicc_base);
+	assert(driver_data != NULL);
+	assert(driver_data->gicc_base != 0U);
 
 	id = gicc_read_hppir(driver_data->gicc_base) & INT_ID_MASK;
 
@@ -292,8 +296,8 @@
  ******************************************************************************/
 unsigned int gicv2_acknowledge_interrupt(void)
 {
-	assert(driver_data);
-	assert(driver_data->gicc_base);
+	assert(driver_data != NULL);
+	assert(driver_data->gicc_base != 0U);
 
 	return gicc_read_IAR(driver_data->gicc_base);
 }
@@ -304,8 +308,8 @@
  ******************************************************************************/
 void gicv2_end_of_interrupt(unsigned int id)
 {
-	assert(driver_data);
-	assert(driver_data->gicc_base);
+	assert(driver_data != NULL);
+	assert(driver_data->gicc_base != 0U);
 
 	gicc_write_EOIR(driver_data->gicc_base, id);
 }
@@ -318,8 +322,8 @@
  ******************************************************************************/
 unsigned int gicv2_get_interrupt_group(unsigned int id)
 {
-	assert(driver_data);
-	assert(driver_data->gicd_base);
+	assert(driver_data != NULL);
+	assert(driver_data->gicd_base != 0U);
 
 	return gicd_get_igroupr(driver_data->gicd_base, id);
 }
@@ -330,8 +334,8 @@
  ******************************************************************************/
 unsigned int gicv2_get_running_priority(void)
 {
-	assert(driver_data);
-	assert(driver_data->gicc_base);
+	assert(driver_data != NULL);
+	assert(driver_data->gicc_base != 0U);
 
 	return gicc_read_rpr(driver_data->gicc_base);
 }
@@ -344,21 +348,21 @@
  ******************************************************************************/
 void gicv2_set_pe_target_mask(unsigned int proc_num)
 {
-	assert(driver_data);
-	assert(driver_data->gicd_base);
-	assert(driver_data->target_masks);
-	assert(proc_num < GICV2_MAX_TARGET_PE);
-	assert(proc_num < driver_data->target_masks_num);
+	assert(driver_data != NULL);
+	assert(driver_data->gicd_base != 0U);
+	assert(driver_data->target_masks != NULL);
+	assert((unsigned int)proc_num < GICV2_MAX_TARGET_PE);
+	assert((unsigned int)proc_num < driver_data->target_masks_num);
 
 	/* Return if the target mask is already populated */
-	if (driver_data->target_masks[proc_num])
+	if (driver_data->target_masks[proc_num] != 0U)
 		return;
 
 	/*
 	 * Update target register corresponding to this CPU and flush for it to
 	 * be visible to other CPUs.
 	 */
-	if (driver_data->target_masks[proc_num] == 0) {
+	if (driver_data->target_masks[proc_num] == 0U) {
 		driver_data->target_masks[proc_num] =
 			gicv2_get_cpuif_id(driver_data->gicd_base);
 #if !(HW_ASSISTED_COHERENCY || WARMBOOT_ENABLE_DCACHE_EARLY)
@@ -382,8 +386,8 @@
  ******************************************************************************/
 unsigned int gicv2_get_interrupt_active(unsigned int id)
 {
-	assert(driver_data);
-	assert(driver_data->gicd_base);
+	assert(driver_data != NULL);
+	assert(driver_data->gicd_base != 0U);
 	assert(id <= MAX_SPI_ID);
 
 	return gicd_get_isactiver(driver_data->gicd_base, id);
@@ -394,8 +398,8 @@
  ******************************************************************************/
 void gicv2_enable_interrupt(unsigned int id)
 {
-	assert(driver_data);
-	assert(driver_data->gicd_base);
+	assert(driver_data != NULL);
+	assert(driver_data->gicd_base != 0U);
 	assert(id <= MAX_SPI_ID);
 
 	/*
@@ -411,8 +415,8 @@
  ******************************************************************************/
 void gicv2_disable_interrupt(unsigned int id)
 {
-	assert(driver_data);
-	assert(driver_data->gicd_base);
+	assert(driver_data != NULL);
+	assert(driver_data->gicd_base != 0U);
 	assert(id <= MAX_SPI_ID);
 
 	/*
@@ -429,8 +433,8 @@
  ******************************************************************************/
 void gicv2_set_interrupt_priority(unsigned int id, unsigned int priority)
 {
-	assert(driver_data);
-	assert(driver_data->gicd_base);
+	assert(driver_data != NULL);
+	assert(driver_data->gicd_base != 0U);
 	assert(id <= MAX_SPI_ID);
 
 	gicd_set_ipriorityr(driver_data->gicd_base, id, priority);
@@ -442,8 +446,8 @@
  ******************************************************************************/
 void gicv2_set_interrupt_type(unsigned int id, unsigned int type)
 {
-	assert(driver_data);
-	assert(driver_data->gicd_base);
+	assert(driver_data != NULL);
+	assert(driver_data->gicd_base != 0U);
 	assert(id <= MAX_SPI_ID);
 
 	/* Serialize read-modify-write to Distributor registers */
@@ -456,7 +460,7 @@
 		gicd_clr_igroupr(driver_data->gicd_base, id);
 		break;
 	default:
-		assert(0);
+		assert(false);
 		break;
 	}
 	spin_unlock(&gic_lock);
@@ -472,20 +476,20 @@
 {
 	unsigned int sgir_val, target;
 
-	assert(driver_data);
-	assert(proc_num < GICV2_MAX_TARGET_PE);
-	assert(driver_data->gicd_base);
+	assert(driver_data != NULL);
+	assert((unsigned int)proc_num < GICV2_MAX_TARGET_PE);
+	assert(driver_data->gicd_base != 0U);
 
 	/*
 	 * Target masks array must have been supplied, and the core position
 	 * should be valid.
 	 */
-	assert(driver_data->target_masks);
-	assert(proc_num < driver_data->target_masks_num);
+	assert(driver_data->target_masks != NULL);
+	assert((unsigned int)proc_num < driver_data->target_masks_num);
 
 	/* Don't raise SGI if the mask hasn't been populated */
 	target = driver_data->target_masks[proc_num];
-	assert(target != 0);
+	assert(target != 0U);
 
 	sgir_val = GICV2_SGIR_VALUE(SGIR_TGT_SPECIFIC, target, sgi_num);
 
@@ -505,20 +509,20 @@
  ******************************************************************************/
 void gicv2_set_spi_routing(unsigned int id, int proc_num)
 {
-	int target;
+	unsigned int target;
 
-	assert(driver_data);
-	assert(driver_data->gicd_base);
+	assert(driver_data != NULL);
+	assert(driver_data->gicd_base != 0U);
 
-	assert(id >= MIN_SPI_ID && id <= MAX_SPI_ID);
+	assert((id >= MIN_SPI_ID) && (id <= MAX_SPI_ID));
 
 	/*
 	 * Target masks array must have been supplied, and the core position
 	 * should be valid.
 	 */
-	assert(driver_data->target_masks);
-	assert(proc_num < GICV2_MAX_TARGET_PE);
-	assert(proc_num < driver_data->target_masks_num);
+	assert(driver_data->target_masks != NULL);
+	assert((unsigned int)proc_num < GICV2_MAX_TARGET_PE);
+	assert((unsigned int)proc_num < driver_data->target_masks_num);
 
 	if (proc_num < 0) {
 		/* Target all PEs */
@@ -526,7 +530,7 @@
 	} else {
 		/* Don't route interrupt if the mask hasn't been populated */
 		target = driver_data->target_masks[proc_num];
-		assert(target != 0);
+		assert(target != 0U);
 	}
 
 	gicd_set_itargetsr(driver_data->gicd_base, id, target);
@@ -537,8 +541,8 @@
  ******************************************************************************/
 void gicv2_clear_interrupt_pending(unsigned int id)
 {
-	assert(driver_data);
-	assert(driver_data->gicd_base);
+	assert(driver_data != NULL);
+	assert(driver_data->gicd_base != 0U);
 
 	/* SGIs can't be cleared pending */
 	assert(id >= MIN_PPI_ID);
@@ -556,8 +560,8 @@
  ******************************************************************************/
 void gicv2_set_interrupt_pending(unsigned int id)
 {
-	assert(driver_data);
-	assert(driver_data->gicd_base);
+	assert(driver_data != NULL);
+	assert(driver_data->gicd_base != 0U);
 
 	/* SGIs can't be cleared pending */
 	assert(id >= MIN_PPI_ID);
@@ -578,8 +582,8 @@
 {
 	unsigned int old_mask;
 
-	assert(driver_data);
-	assert(driver_data->gicc_base);
+	assert(driver_data != NULL);
+	assert(driver_data->gicc_base != 0U);
 
 	old_mask = gicc_read_pmr(driver_data->gicc_base);
 
diff --git a/drivers/arm/gic/v2/gicv2_private.h b/drivers/arm/gic/v2/gicv2_private.h
index 25600de..fadc960 100644
--- a/drivers/arm/gic/v2/gicv2_private.h
+++ b/drivers/arm/gic/v2/gicv2_private.h
@@ -50,7 +50,9 @@
 static inline void gicd_set_itargetsr(uintptr_t base, unsigned int id,
 		unsigned int target)
 {
-	mmio_write_8(base + GICD_ITARGETSR + id, target & GIC_TARGET_CPU_MASK);
+	uint8_t val = target & GIC_TARGET_CPU_MASK;
+
+	mmio_write_8(base + GICD_ITARGETSR + id, val);
 }
 
 static inline void gicd_write_sgir(uintptr_t base, unsigned int val)
diff --git a/drivers/arm/gic/v3/gicv3_helpers.c b/drivers/arm/gic/v3/gicv3_helpers.c
index 2ea8c72..1953a37 100644
--- a/drivers/arm/gic/v3/gicv3_helpers.c
+++ b/drivers/arm/gic/v3/gicv3_helpers.c
@@ -19,7 +19,8 @@
  */
 unsigned int gicd_read_igrpmodr(uintptr_t base, unsigned int id)
 {
-	unsigned n = id >> IGRPMODR_SHIFT;
+	unsigned int n = id >> IGRPMODR_SHIFT;
+
 	return mmio_read_32(base + GICD_IGRPMODR + (n << 2));
 }
 
@@ -29,7 +30,8 @@
  */
 void gicd_write_igrpmodr(uintptr_t base, unsigned int id, unsigned int val)
 {
-	unsigned n = id >> IGRPMODR_SHIFT;
+	unsigned int n = id >> IGRPMODR_SHIFT;
+
 	mmio_write_32(base + GICD_IGRPMODR + (n << 2), val);
 }
 
@@ -39,10 +41,10 @@
  */
 unsigned int gicd_get_igrpmodr(uintptr_t base, unsigned int id)
 {
-	unsigned bit_num = id & ((1 << IGRPMODR_SHIFT) - 1);
+	unsigned int bit_num = id & ((1U << IGRPMODR_SHIFT) - 1U);
 	unsigned int reg_val = gicd_read_igrpmodr(base, id);
 
-	return (reg_val >> bit_num) & 0x1;
+	return (reg_val >> bit_num) & 0x1U;
 }
 
 /*
@@ -51,10 +53,10 @@
  */
 void gicd_set_igrpmodr(uintptr_t base, unsigned int id)
 {
-	unsigned bit_num = id & ((1 << IGRPMODR_SHIFT) - 1);
+	unsigned int bit_num = id & ((1U << IGRPMODR_SHIFT) - 1U);
 	unsigned int reg_val = gicd_read_igrpmodr(base, id);
 
-	gicd_write_igrpmodr(base, id, reg_val | (1 << bit_num));
+	gicd_write_igrpmodr(base, id, reg_val | (1U << bit_num));
 }
 
 /*
@@ -63,10 +65,10 @@
  */
 void gicd_clr_igrpmodr(uintptr_t base, unsigned int id)
 {
-	unsigned bit_num = id & ((1 << IGRPMODR_SHIFT) - 1);
+	unsigned int bit_num = id & ((1U << IGRPMODR_SHIFT) - 1U);
 	unsigned int reg_val = gicd_read_igrpmodr(base, id);
 
-	gicd_write_igrpmodr(base, id, reg_val & ~(1 << bit_num));
+	gicd_write_igrpmodr(base, id, reg_val & ~(1U << bit_num));
 }
 
 /*
@@ -75,7 +77,8 @@
  */
 unsigned int gicr_read_ipriorityr(uintptr_t base, unsigned int id)
 {
-	unsigned n = id >> IPRIORITYR_SHIFT;
+	unsigned int n = id >> IPRIORITYR_SHIFT;
+
 	return mmio_read_32(base + GICR_IPRIORITYR + (n << 2));
 }
 
@@ -85,7 +88,8 @@
  */
 void gicr_write_ipriorityr(uintptr_t base, unsigned int id, unsigned int val)
 {
-	unsigned n = id >> IPRIORITYR_SHIFT;
+	unsigned int n = id >> IPRIORITYR_SHIFT;
+
 	mmio_write_32(base + GICR_IPRIORITYR + (n << 2), val);
 }
 
@@ -95,10 +99,10 @@
  */
 unsigned int gicr_get_igroupr0(uintptr_t base, unsigned int id)
 {
-	unsigned bit_num = id & ((1 << IGROUPR_SHIFT) - 1);
+	unsigned int bit_num = id & ((1U << IGROUPR_SHIFT) - 1U);
 	unsigned int reg_val = gicr_read_igroupr0(base);
 
-	return (reg_val >> bit_num) & 0x1;
+	return (reg_val >> bit_num) & 0x1U;
 }
 
 /*
@@ -107,10 +111,10 @@
  */
 void gicr_set_igroupr0(uintptr_t base, unsigned int id)
 {
-	unsigned bit_num = id & ((1 << IGROUPR_SHIFT) - 1);
+	unsigned int bit_num = id & ((1U << IGROUPR_SHIFT) - 1U);
 	unsigned int reg_val = gicr_read_igroupr0(base);
 
-	gicr_write_igroupr0(base, reg_val | (1 << bit_num));
+	gicr_write_igroupr0(base, reg_val | (1U << bit_num));
 }
 
 /*
@@ -119,10 +123,10 @@
  */
 void gicr_clr_igroupr0(uintptr_t base, unsigned int id)
 {
-	unsigned bit_num = id & ((1 << IGROUPR_SHIFT) - 1);
+	unsigned int bit_num = id & ((1U << IGROUPR_SHIFT) - 1U);
 	unsigned int reg_val = gicr_read_igroupr0(base);
 
-	gicr_write_igroupr0(base, reg_val & ~(1 << bit_num));
+	gicr_write_igroupr0(base, reg_val & ~(1U << bit_num));
 }
 
 /*
@@ -131,10 +135,10 @@
  */
 unsigned int gicr_get_igrpmodr0(uintptr_t base, unsigned int id)
 {
-	unsigned bit_num = id & ((1 << IGRPMODR_SHIFT) - 1);
+	unsigned int bit_num = id & ((1U << IGRPMODR_SHIFT) - 1U);
 	unsigned int reg_val = gicr_read_igrpmodr0(base);
 
-	return (reg_val >> bit_num) & 0x1;
+	return (reg_val >> bit_num) & 0x1U;
 }
 
 /*
@@ -143,10 +147,10 @@
  */
 void gicr_set_igrpmodr0(uintptr_t base, unsigned int id)
 {
-	unsigned bit_num = id & ((1 << IGRPMODR_SHIFT) - 1);
+	unsigned int bit_num = id & ((1U << IGRPMODR_SHIFT) - 1U);
 	unsigned int reg_val = gicr_read_igrpmodr0(base);
 
-	gicr_write_igrpmodr0(base, reg_val | (1 << bit_num));
+	gicr_write_igrpmodr0(base, reg_val | (1U << bit_num));
 }
 
 /*
@@ -155,10 +159,10 @@
  */
 void gicr_clr_igrpmodr0(uintptr_t base, unsigned int id)
 {
-	unsigned bit_num = id & ((1 << IGRPMODR_SHIFT) - 1);
+	unsigned int bit_num = id & ((1U << IGRPMODR_SHIFT) - 1U);
 	unsigned int reg_val = gicr_read_igrpmodr0(base);
 
-	gicr_write_igrpmodr0(base, reg_val & ~(1 << bit_num));
+	gicr_write_igrpmodr0(base, reg_val & ~(1U << bit_num));
 }
 
 /*
@@ -167,9 +171,9 @@
  */
 void gicr_set_isenabler0(uintptr_t base, unsigned int id)
 {
-	unsigned bit_num = id & ((1 << ISENABLER_SHIFT) - 1);
+	unsigned int bit_num = id & ((1U << ISENABLER_SHIFT) - 1U);
 
-	gicr_write_isenabler0(base, (1 << bit_num));
+	gicr_write_isenabler0(base, (1U << bit_num));
 }
 
 /*
@@ -178,9 +182,9 @@
  */
 void gicr_set_icenabler0(uintptr_t base, unsigned int id)
 {
-	unsigned bit_num = id & ((1 << ICENABLER_SHIFT) - 1);
+	unsigned int bit_num = id & ((1U << ICENABLER_SHIFT) - 1U);
 
-	gicr_write_icenabler0(base, (1 << bit_num));
+	gicr_write_icenabler0(base, (1U << bit_num));
 }
 
 /*
@@ -189,10 +193,10 @@
  */
 unsigned int gicr_get_isactiver0(uintptr_t base, unsigned int id)
 {
-	unsigned bit_num = id & ((1 << ISACTIVER_SHIFT) - 1);
+	unsigned int bit_num = id & ((1U << ISACTIVER_SHIFT) - 1U);
 	unsigned int reg_val = gicr_read_isactiver0(base);
 
-	return (reg_val >> bit_num) & 0x1;
+	return (reg_val >> bit_num) & 0x1U;
 }
 
 /*
@@ -201,9 +205,9 @@
  */
 void gicr_set_icpendr0(uintptr_t base, unsigned int id)
 {
-	unsigned bit_num = id & ((1 << ICPENDR_SHIFT) - 1);
+	unsigned int bit_num = id & ((1U << ICPENDR_SHIFT) - 1U);
 
-	gicr_write_icpendr0(base, (1 << bit_num));
+	gicr_write_icpendr0(base, (1U << bit_num));
 }
 
 /*
@@ -212,9 +216,9 @@
  */
 void gicr_set_ispendr0(uintptr_t base, unsigned int id)
 {
-	unsigned bit_num = id & ((1 << ISPENDR_SHIFT) - 1);
+	unsigned int bit_num = id & ((1U << ISPENDR_SHIFT) - 1U);
 
-	gicr_write_ispendr0(base, (1 << bit_num));
+	gicr_write_ispendr0(base, (1U << bit_num));
 }
 
 /*
@@ -223,7 +227,9 @@
  */
 void gicr_set_ipriorityr(uintptr_t base, unsigned int id, unsigned int pri)
 {
-	mmio_write_8(base + GICR_IPRIORITYR + id, pri & GIC_PRI_MASK);
+	uint8_t val = pri & GIC_PRI_MASK;
+
+	mmio_write_8(base + GICR_IPRIORITYR + id, val);
 }
 
 /*
@@ -233,8 +239,8 @@
 void gicr_set_icfgr0(uintptr_t base, unsigned int id, unsigned int cfg)
 {
 	/* Interrupt configuration is a 2-bit field */
-	unsigned int bit_num = id & ((1 << ICFGR_SHIFT) - 1);
-	unsigned int bit_shift = bit_num << 1;
+	unsigned int bit_num = id & ((1U << ICFGR_SHIFT) - 1U);
+	unsigned int bit_shift = bit_num << 1U;
 
 	uint32_t reg_val = gicr_read_icfgr0(base);
 
@@ -252,8 +258,8 @@
 void gicr_set_icfgr1(uintptr_t base, unsigned int id, unsigned int cfg)
 {
 	/* Interrupt configuration is a 2-bit field */
-	unsigned int bit_num = id & ((1 << ICFGR_SHIFT) - 1);
-	unsigned int bit_shift = bit_num << 1;
+	unsigned int bit_num = id & ((1U << ICFGR_SHIFT) - 1U);
+	unsigned int bit_shift = bit_num << 1U;
 
 	uint32_t reg_val = gicr_read_icfgr1(base);
 
@@ -274,13 +280,13 @@
 	 * The WAKER_PS_BIT should be changed to 0
 	 * only when WAKER_CA_BIT is 1.
 	 */
-	assert(gicr_read_waker(gicr_base) & WAKER_CA_BIT);
+	assert((gicr_read_waker(gicr_base) & WAKER_CA_BIT) != 0U);
 
 	/* Mark the connected core as awake */
 	gicr_write_waker(gicr_base, gicr_read_waker(gicr_base) & ~WAKER_PS_BIT);
 
 	/* Wait till the WAKER_CA_BIT changes to 0 */
-	while (gicr_read_waker(gicr_base) & WAKER_CA_BIT)
+	while ((gicr_read_waker(gicr_base) & WAKER_CA_BIT) != 0U)
 		;
 }
 
@@ -295,7 +301,7 @@
 	gicr_write_waker(gicr_base, gicr_read_waker(gicr_base) | WAKER_PS_BIT);
 
 	/* Wait till the WAKER_CA_BIT changes to 1 */
-	while (!(gicr_read_waker(gicr_base) & WAKER_CA_BIT))
+	while ((gicr_read_waker(gicr_base) & WAKER_CA_BIT) == 0U)
 		;
 }
 
@@ -312,10 +318,10 @@
 {
 	u_register_t mpidr;
 	unsigned int proc_num;
-	unsigned long long typer_val;
+	uint64_t typer_val;
 	uintptr_t rdistif_base = gicr_base;
 
-	assert(rdistif_base_addrs);
+	assert(rdistif_base_addrs != NULL);
 
 	/*
 	 * Iterate over the Redistributor frames. Store the base address of each
@@ -326,7 +332,7 @@
 	 */
 	do {
 		typer_val = gicr_read_typer(rdistif_base);
-		if (mpidr_to_core_pos) {
+		if (mpidr_to_core_pos != NULL) {
 			mpidr = mpidr_from_gicr_typer(typer_val);
 			proc_num = mpidr_to_core_pos(mpidr);
 		} else {
@@ -335,8 +341,8 @@
 		}
 		assert(proc_num < rdistif_num);
 		rdistif_base_addrs[proc_num] = rdistif_base;
-		rdistif_base += (1 << GICR_PCPUBASE_SHIFT);
-	} while (!(typer_val & TYPER_LAST_BIT));
+		rdistif_base += (1U << GICR_PCPUBASE_SHIFT);
+	} while ((typer_val & TYPER_LAST_BIT) == 0U);
 }
 
 /*******************************************************************************
@@ -348,17 +354,17 @@
 
 	num_ints = gicd_read_typer(gicd_base);
 	num_ints &= TYPER_IT_LINES_NO_MASK;
-	num_ints = (num_ints + 1) << 5;
+	num_ints = (num_ints + 1U) << 5;
 
 	/*
 	 * Treat all SPIs as G1NS by default. The number of interrupts is
 	 * calculated as 32 * (IT_LINES + 1). We do 32 at a time.
 	 */
-	for (index = MIN_SPI_ID; index < num_ints; index += 32)
+	for (index = MIN_SPI_ID; index < num_ints; index += 32U)
 		gicd_write_igroupr(gicd_base, index, ~0U);
 
 	/* Setup the default SPI priorities doing four at a time */
-	for (index = MIN_SPI_ID; index < num_ints; index += 4)
+	for (index = MIN_SPI_ID; index < num_ints; index += 4U)
 		gicd_write_ipriorityr(gicd_base,
 				      index,
 				      GICD_IPRIORITYR_DEF_VAL);
@@ -367,8 +373,8 @@
 	 * Treat all SPIs as level triggered by default, write 16 at
 	 * a time
 	 */
-	for (index = MIN_SPI_ID; index < num_ints; index += 16)
-		gicd_write_icfgr(gicd_base, index, 0);
+	for (index = MIN_SPI_ID; index < num_ints; index += 16U)
+		gicd_write_icfgr(gicd_base, index, 0U);
 }
 
 #if !ERROR_DEPRECATED
@@ -385,9 +391,10 @@
 
 	assert((int_grp == INTR_GROUP1S) || (int_grp == INTR_GROUP0));
 	/* If `num_ints` is not 0, ensure that `sec_intr_list` is not NULL */
-	assert(num_ints ? (uintptr_t)sec_intr_list : 1);
+	if (num_ints != 0U)
+		assert(sec_intr_list != NULL);
 
-	for (index = 0; index < num_ints; index++) {
+	for (index = 0U; index < num_ints; index++) {
 		irq_num = sec_intr_list[index];
 		if (irq_num >= MIN_SPI_ID) {
 
@@ -407,7 +414,7 @@
 
 			/* Target SPIs to the primary CPU */
 			gic_affinity_val =
-				gicd_irouter_val_from_mpidr(read_mpidr(), 0);
+				gicd_irouter_val_from_mpidr(read_mpidr(), 0U);
 			gicd_write_irouter(gicd_base,
 					   irq_num,
 					   gic_affinity_val);
@@ -430,12 +437,13 @@
 	unsigned int i;
 	const interrupt_prop_t *current_prop;
 	unsigned long long gic_affinity_val;
-	unsigned int ctlr_enable = 0;
+	unsigned int ctlr_enable = 0U;
 
 	/* Make sure there's a valid property array */
-	assert(interrupt_props_num > 0 ? interrupt_props != NULL : 1);
+	if (interrupt_props_num > 0U)
+		assert(interrupt_props != NULL);
 
-	for (i = 0; i < interrupt_props_num; i++) {
+	for (i = 0U; i < interrupt_props_num; i++) {
 		current_prop = &interrupt_props[i];
 
 		if (current_prop->intr_num < MIN_SPI_ID)
@@ -464,7 +472,8 @@
 				current_prop->intr_pri);
 
 		/* Target SPIs to the primary CPU */
-		gic_affinity_val = gicd_irouter_val_from_mpidr(read_mpidr(), 0);
+		gic_affinity_val =
+			gicd_irouter_val_from_mpidr(read_mpidr(), 0U);
 		gicd_write_irouter(gicd_base, current_prop->intr_num,
 				gic_affinity_val);
 
@@ -487,20 +496,20 @@
 	 * more scalable approach as it avoids clearing the enable bits in the
 	 * GICD_CTLR
 	 */
-	gicr_write_icenabler0(gicr_base, ~0);
+	gicr_write_icenabler0(gicr_base, ~0U);
 	gicr_wait_for_pending_write(gicr_base);
 
 	/* Treat all SGIs/PPIs as G1NS by default. */
 	gicr_write_igroupr0(gicr_base, ~0U);
 
 	/* Setup the default PPI/SGI priorities doing four at a time */
-	for (index = 0; index < MIN_SPI_ID; index += 4)
+	for (index = 0U; index < MIN_SPI_ID; index += 4U)
 		gicr_write_ipriorityr(gicr_base,
 				      index,
 				      GICD_IPRIORITYR_DEF_VAL);
 
 	/* Configure all PPIs as level triggered by default */
-	gicr_write_icfgr1(gicr_base, 0);
+	gicr_write_icfgr1(gicr_base, 0U);
 }
 
 #if !ERROR_DEPRECATED
@@ -516,7 +525,8 @@
 
 	assert((int_grp == INTR_GROUP1S) || (int_grp == INTR_GROUP0));
 	/* If `num_ints` is not 0, ensure that `sec_intr_list` is not NULL */
-	assert(num_ints ? (uintptr_t)sec_intr_list : 1);
+	if (num_ints != 0U)
+		assert(sec_intr_list != NULL);
 
 	for (index = 0; index < num_ints; index++) {
 		irq_num = sec_intr_list[index];
@@ -552,12 +562,13 @@
 {
 	unsigned int i;
 	const interrupt_prop_t *current_prop;
-	unsigned int ctlr_enable = 0;
+	unsigned int ctlr_enable = 0U;
 
 	/* Make sure there's a valid property array */
-	assert(interrupt_props_num > 0 ? interrupt_props != NULL : 1);
+	if (interrupt_props_num > 0U)
+		assert(interrupt_props != NULL);
 
-	for (i = 0; i < interrupt_props_num; i++) {
+	for (i = 0U; i < interrupt_props_num; i++) {
 		current_prop = &interrupt_props[i];
 
 		if (current_prop->intr_num >= MIN_SPI_ID)
diff --git a/drivers/arm/gic/v3/gicv3_main.c b/drivers/arm/gic/v3/gicv3_main.c
index 40d14ab..d764eb2 100644
--- a/drivers/arm/gic/v3/gicv3_main.c
+++ b/drivers/arm/gic/v3/gicv3_main.c
@@ -34,21 +34,21 @@
 /* Helper macros to save and restore GICD registers to and from the context */
 #define RESTORE_GICD_REGS(base, ctx, intr_num, reg, REG)		\
 	do {								\
-		for (unsigned int int_id = MIN_SPI_ID; int_id < intr_num; \
-				int_id += (1 << REG##_SHIFT)) {		\
+		for (unsigned int int_id = MIN_SPI_ID; int_id < (intr_num); \
+				int_id += (1U << REG##_SHIFT)) {	\
 			gicd_write_##reg(base, int_id,			\
 				ctx->gicd_##reg[(int_id - MIN_SPI_ID) >> REG##_SHIFT]); \
 		}							\
-	} while (0)
+	} while (false)
 
 #define SAVE_GICD_REGS(base, ctx, intr_num, reg, REG)			\
 	do {								\
-		for (unsigned int int_id = MIN_SPI_ID; int_id < intr_num; \
-				int_id += (1 << REG##_SHIFT)) {		\
+		for (unsigned int int_id = MIN_SPI_ID; int_id < (intr_num); \
+				int_id += (1U << REG##_SHIFT)) {	\
 			ctx->gicd_##reg[(int_id - MIN_SPI_ID) >> REG##_SHIFT] =\
 					gicd_read_##reg(base, int_id);	\
 		}							\
-	} while (0)
+	} while (false)
 
 
 /*******************************************************************************
@@ -59,11 +59,11 @@
 {
 	unsigned int gic_version;
 
-	assert(plat_driver_data);
-	assert(plat_driver_data->gicd_base);
-	assert(plat_driver_data->gicr_base);
-	assert(plat_driver_data->rdistif_num);
-	assert(plat_driver_data->rdistif_base_addrs);
+	assert(plat_driver_data != NULL);
+	assert(plat_driver_data->gicd_base != 0U);
+	assert(plat_driver_data->gicr_base != 0U);
+	assert(plat_driver_data->rdistif_num != 0U);
+	assert(plat_driver_data->rdistif_base_addrs != NULL);
 
 	assert(IS_IN_EL3());
 
@@ -109,10 +109,10 @@
 
 	/* Check for system register support */
 #ifdef AARCH32
-	assert(read_id_pfr1() & (ID_PFR1_GIC_MASK << ID_PFR1_GIC_SHIFT));
+	assert((read_id_pfr1() & (ID_PFR1_GIC_MASK << ID_PFR1_GIC_SHIFT)) != 0U);
 #else
-	assert(read_id_aa64pfr0_el1() &
-			(ID_AA64PFR0_GIC_MASK << ID_AA64PFR0_GIC_SHIFT));
+	assert((read_id_aa64pfr0_el1() &
+			(ID_AA64PFR0_GIC_MASK << ID_AA64PFR0_GIC_SHIFT)) != 0U);
 #endif /* AARCH32 */
 
 	/* The GIC version should be 3.0 */
@@ -170,8 +170,8 @@
 {
 	unsigned int bitmap = 0;
 
-	assert(gicv3_driver_data);
-	assert(gicv3_driver_data->gicd_base);
+	assert(gicv3_driver_data != NULL);
+	assert(gicv3_driver_data->gicd_base != 0U);
 
 	assert(IS_IN_EL3());
 
@@ -245,16 +245,16 @@
 void gicv3_rdistif_init(unsigned int proc_num)
 {
 	uintptr_t gicr_base;
-	unsigned int bitmap = 0;
+	unsigned int bitmap = 0U;
 	uint32_t ctlr;
 
-	assert(gicv3_driver_data);
+	assert(gicv3_driver_data != NULL);
 	assert(proc_num < gicv3_driver_data->rdistif_num);
-	assert(gicv3_driver_data->rdistif_base_addrs);
-	assert(gicv3_driver_data->gicd_base);
+	assert(gicv3_driver_data->rdistif_base_addrs != NULL);
+	assert(gicv3_driver_data->gicd_base != 0U);
 
 	ctlr = gicd_read_ctlr(gicv3_driver_data->gicd_base);
-	assert(ctlr & CTLR_ARE_S_BIT);
+	assert((ctlr & CTLR_ARE_S_BIT) != 0U);
 
 	assert(IS_IN_EL3());
 
@@ -333,9 +333,9 @@
 	unsigned int scr_el3;
 	unsigned int icc_sre_el3;
 
-	assert(gicv3_driver_data);
+	assert(gicv3_driver_data != NULL);
 	assert(proc_num < gicv3_driver_data->rdistif_num);
-	assert(gicv3_driver_data->rdistif_base_addrs);
+	assert(gicv3_driver_data->rdistif_base_addrs != NULL);
 	assert(IS_IN_EL3());
 
 	/* Mark the connected core as awake */
@@ -353,7 +353,7 @@
 	icc_sre_el3 |= (ICC_SRE_EN_BIT | ICC_SRE_SRE_BIT);
 	write_icc_sre_el3(read_icc_sre_el3() | icc_sre_el3);
 
-	scr_el3 = read_scr_el3();
+	scr_el3 = (uint32_t) read_scr_el3();
 
 	/*
 	 * Switch to NS state to write Non secure ICC_SRE_EL1 and
@@ -393,9 +393,9 @@
 {
 	uintptr_t gicr_base;
 
-	assert(gicv3_driver_data);
+	assert(gicv3_driver_data != NULL);
 	assert(proc_num < gicv3_driver_data->rdistif_num);
-	assert(gicv3_driver_data->rdistif_base_addrs);
+	assert(gicv3_driver_data->rdistif_base_addrs != NULL);
 
 	assert(IS_IN_EL3());
 
@@ -429,14 +429,14 @@
 	unsigned int id;
 
 	assert(IS_IN_EL3());
-	id = read_icc_hppir0_el1() & HPPIR0_EL1_INTID_MASK;
+	id = (uint32_t)read_icc_hppir0_el1() & HPPIR0_EL1_INTID_MASK;
 
 	/*
 	 * If the ID is special identifier corresponding to G1S or G1NS
 	 * interrupt, then read the highest pending group 1 interrupt.
 	 */
 	if ((id == PENDING_G1S_INTID) || (id == PENDING_G1NS_INTID))
-		return read_icc_hppir1_el1() & HPPIR1_EL1_INTID_MASK;
+		return (uint32_t)read_icc_hppir1_el1() & HPPIR1_EL1_INTID_MASK;
 
 	return id;
 }
@@ -453,7 +453,7 @@
 unsigned int gicv3_get_pending_interrupt_type(void)
 {
 	assert(IS_IN_EL3());
-	return read_icc_hppir0_el1() & HPPIR0_EL1_INTID_MASK;
+	return (uint32_t)read_icc_hppir0_el1() & HPPIR0_EL1_INTID_MASK;
 }
 
 /*******************************************************************************
@@ -473,10 +473,10 @@
 	uintptr_t gicr_base;
 
 	assert(IS_IN_EL3());
-	assert(gicv3_driver_data);
+	assert(gicv3_driver_data != NULL);
 
 	/* Ensure the parameters are valid */
-	assert(id < PENDING_G1S_INTID || id >= MIN_LPI_ID);
+	assert((id < PENDING_G1S_INTID) || (id >= MIN_LPI_ID));
 	assert(proc_num < gicv3_driver_data->rdistif_num);
 
 	/* All LPI interrupts are Group 1 non secure */
@@ -484,12 +484,12 @@
 		return INTR_GROUP1NS;
 
 	if (id < MIN_SPI_ID) {
-		assert(gicv3_driver_data->rdistif_base_addrs);
+		assert(gicv3_driver_data->rdistif_base_addrs != 0U);
 		gicr_base = gicv3_driver_data->rdistif_base_addrs[proc_num];
 		igroup = gicr_get_igroupr0(gicr_base, id);
 		grpmodr = gicr_get_igrpmodr0(gicr_base, id);
 	} else {
-		assert(gicv3_driver_data->gicd_base);
+		assert(gicv3_driver_data->gicd_base != 0U);
 		igroup = gicd_get_igroupr(gicv3_driver_data->gicd_base, id);
 		grpmodr = gicd_get_igrpmodr(gicv3_driver_data->gicd_base, id);
 	}
@@ -498,11 +498,11 @@
 	 * If the IGROUP bit is set, then it is a Group 1 Non secure
 	 * interrupt
 	 */
-	if (igroup)
+	if (igroup != 0U)
 		return INTR_GROUP1NS;
 
 	/* If the GRPMOD bit is set, then it is a Group 1 Secure interrupt */
-	if (grpmodr)
+	if (grpmodr != 0U)
 		return INTR_GROUP1S;
 
 	/* Else it is a Group 0 Secure interrupt */
@@ -522,12 +522,12 @@
  *****************************************************************************/
 void gicv3_its_save_disable(uintptr_t gits_base, gicv3_its_ctx_t * const its_ctx)
 {
-	int i;
+	unsigned int i;
 
-	assert(gicv3_driver_data);
+	assert(gicv3_driver_data != NULL);
 	assert(IS_IN_EL3());
-	assert(its_ctx);
-	assert(gits_base);
+	assert(its_ctx != NULL);
+	assert(gits_base != 0U);
 
 	its_ctx->gits_ctlr = gits_read_ctlr(gits_base);
 
@@ -555,16 +555,16 @@
  *****************************************************************************/
 void gicv3_its_restore(uintptr_t gits_base, const gicv3_its_ctx_t * const its_ctx)
 {
-	int i;
+	unsigned int i;
 
-	assert(gicv3_driver_data);
+	assert(gicv3_driver_data != NULL);
 	assert(IS_IN_EL3());
-	assert(its_ctx);
-	assert(gits_base);
+	assert(its_ctx != NULL);
+	assert(gits_base != 0U);
 
 	/* Assert that the GITS is disabled and quiescent */
-	assert((gits_read_ctlr(gits_base) & GITS_CTLR_ENABLED_BIT) == 0);
-	assert((gits_read_ctlr(gits_base) & GITS_CTLR_QUIESCENT_BIT) != 0);
+	assert((gits_read_ctlr(gits_base) & GITS_CTLR_ENABLED_BIT) == 0U);
+	assert((gits_read_ctlr(gits_base) & GITS_CTLR_QUIESCENT_BIT) != 0U);
 
 	gits_write_cbaser(gits_base, its_ctx->gits_cbaser);
 	gits_write_cwriter(gits_base, its_ctx->gits_cwriter);
@@ -586,11 +586,11 @@
 	uintptr_t gicr_base;
 	unsigned int int_id;
 
-	assert(gicv3_driver_data);
+	assert(gicv3_driver_data != NULL);
 	assert(proc_num < gicv3_driver_data->rdistif_num);
-	assert(gicv3_driver_data->rdistif_base_addrs);
+	assert(gicv3_driver_data->rdistif_base_addrs != NULL);
 	assert(IS_IN_EL3());
-	assert(rdist_ctx);
+	assert(rdist_ctx != NULL);
 
 	gicr_base = gicv3_driver_data->rdistif_base_addrs[proc_num];
 
@@ -614,7 +614,7 @@
 	rdist_ctx->gicr_igrpmodr0 = gicr_read_igrpmodr0(gicr_base);
 	rdist_ctx->gicr_nsacr = gicr_read_nsacr(gicr_base);
 	for (int_id = MIN_SGI_ID; int_id < TOTAL_PCPU_INTR_NUM;
-			int_id += (1 << IPRIORITYR_SHIFT)) {
+			int_id += (1U << IPRIORITYR_SHIFT)) {
 		rdist_ctx->gicr_ipriorityr[(int_id - MIN_SGI_ID) >> IPRIORITYR_SHIFT] =
 				gicr_read_ipriorityr(gicr_base, int_id);
 	}
@@ -641,11 +641,11 @@
 	uintptr_t gicr_base;
 	unsigned int int_id;
 
-	assert(gicv3_driver_data);
+	assert(gicv3_driver_data != NULL);
 	assert(proc_num < gicv3_driver_data->rdistif_num);
-	assert(gicv3_driver_data->rdistif_base_addrs);
+	assert(gicv3_driver_data->rdistif_base_addrs != NULL);
 	assert(IS_IN_EL3());
-	assert(rdist_ctx);
+	assert(rdist_ctx != NULL);
 
 	gicr_base = gicv3_driver_data->rdistif_base_addrs[proc_num];
 
@@ -664,7 +664,7 @@
 	 * more scalable approach as it avoids clearing the enable bits in the
 	 * GICD_CTLR
 	 */
-	gicr_write_icenabler0(gicr_base, ~0);
+	gicr_write_icenabler0(gicr_base, ~0U);
 	/* Wait for pending writes to GICR_ICENABLER */
 	gicr_wait_for_pending_write(gicr_base);
 
@@ -682,7 +682,7 @@
 	gicr_write_igroupr0(gicr_base, rdist_ctx->gicr_igroupr0);
 
 	for (int_id = MIN_SGI_ID; int_id < TOTAL_PCPU_INTR_NUM;
-			int_id += (1 << IPRIORITYR_SHIFT)) {
+			int_id += (1U << IPRIORITYR_SHIFT)) {
 		gicr_write_ipriorityr(gicr_base, int_id,
 		rdist_ctx->gicr_ipriorityr[
 				(int_id - MIN_SGI_ID) >> IPRIORITYR_SHIFT]);
@@ -722,18 +722,18 @@
 {
 	unsigned int num_ints;
 
-	assert(gicv3_driver_data);
-	assert(gicv3_driver_data->gicd_base);
+	assert(gicv3_driver_data != NULL);
+	assert(gicv3_driver_data->gicd_base != 0U);
 	assert(IS_IN_EL3());
-	assert(dist_ctx);
+	assert(dist_ctx != NULL);
 
 	uintptr_t gicd_base = gicv3_driver_data->gicd_base;
 
 	num_ints = gicd_read_typer(gicd_base);
 	num_ints &= TYPER_IT_LINES_NO_MASK;
-	num_ints = (num_ints + 1) << 5;
+	num_ints = (num_ints + 1U) << 5;
 
-	assert(num_ints <= MAX_SPI_ID + 1);
+	assert(num_ints <= (MAX_SPI_ID + 1U));
 
 	/* Wait for pending write to complete */
 	gicd_wait_for_pending_write(gicd_base);
@@ -784,12 +784,12 @@
  *****************************************************************************/
 void gicv3_distif_init_restore(const gicv3_dist_ctx_t * const dist_ctx)
 {
-	unsigned int num_ints = 0;
+	unsigned int num_ints = 0U;
 
-	assert(gicv3_driver_data);
-	assert(gicv3_driver_data->gicd_base);
+	assert(gicv3_driver_data != NULL);
+	assert(gicv3_driver_data->gicd_base != 0U);
 	assert(IS_IN_EL3());
-	assert(dist_ctx);
+	assert(dist_ctx != NULL);
 
 	uintptr_t gicd_base = gicv3_driver_data->gicd_base;
 
@@ -809,9 +809,9 @@
 
 	num_ints = gicd_read_typer(gicd_base);
 	num_ints &= TYPER_IT_LINES_NO_MASK;
-	num_ints = (num_ints + 1) << 5;
+	num_ints = (num_ints + 1U) << 5;
 
-	assert(num_ints <= MAX_SPI_ID + 1);
+	assert(num_ints <= (MAX_SPI_ID + 1U));
 
 	/* Restore GICD_IGROUPR for INTIDs 32 - 1020 */
 	RESTORE_GICD_REGS(gicd_base, dist_ctx, num_ints, igroupr, IGROUPR);
@@ -857,7 +857,7 @@
  ******************************************************************************/
 unsigned int gicv3_get_running_priority(void)
 {
-	return read_icc_rpr_el1();
+	return (unsigned int)read_icc_rpr_el1();
 }
 
 /*******************************************************************************
@@ -870,10 +870,10 @@
 {
 	unsigned int value;
 
-	assert(gicv3_driver_data);
-	assert(gicv3_driver_data->gicd_base);
+	assert(gicv3_driver_data != NULL);
+	assert(gicv3_driver_data->gicd_base != 0U);
 	assert(proc_num < gicv3_driver_data->rdistif_num);
-	assert(gicv3_driver_data->rdistif_base_addrs);
+	assert(gicv3_driver_data->rdistif_base_addrs != NULL);
 	assert(id <= MAX_SPI_ID);
 
 	if (id < MIN_SPI_ID) {
@@ -894,10 +894,10 @@
  ******************************************************************************/
 void gicv3_enable_interrupt(unsigned int id, unsigned int proc_num)
 {
-	assert(gicv3_driver_data);
-	assert(gicv3_driver_data->gicd_base);
+	assert(gicv3_driver_data != NULL);
+	assert(gicv3_driver_data->gicd_base != 0U);
 	assert(proc_num < gicv3_driver_data->rdistif_num);
-	assert(gicv3_driver_data->rdistif_base_addrs);
+	assert(gicv3_driver_data->rdistif_base_addrs != NULL);
 	assert(id <= MAX_SPI_ID);
 
 	/*
@@ -922,10 +922,10 @@
  ******************************************************************************/
 void gicv3_disable_interrupt(unsigned int id, unsigned int proc_num)
 {
-	assert(gicv3_driver_data);
-	assert(gicv3_driver_data->gicd_base);
+	assert(gicv3_driver_data != NULL);
+	assert(gicv3_driver_data->gicd_base != 0U);
 	assert(proc_num < gicv3_driver_data->rdistif_num);
-	assert(gicv3_driver_data->rdistif_base_addrs);
+	assert(gicv3_driver_data->rdistif_base_addrs != NULL);
 	assert(id <= MAX_SPI_ID);
 
 	/*
@@ -960,10 +960,10 @@
 {
 	uintptr_t gicr_base;
 
-	assert(gicv3_driver_data);
-	assert(gicv3_driver_data->gicd_base);
+	assert(gicv3_driver_data != NULL);
+	assert(gicv3_driver_data->gicd_base != 0U);
 	assert(proc_num < gicv3_driver_data->rdistif_num);
-	assert(gicv3_driver_data->rdistif_base_addrs);
+	assert(gicv3_driver_data->rdistif_base_addrs != NULL);
 	assert(id <= MAX_SPI_ID);
 
 	if (id < MIN_SPI_ID) {
@@ -982,29 +982,29 @@
 void gicv3_set_interrupt_type(unsigned int id, unsigned int proc_num,
 		unsigned int type)
 {
-	unsigned int igroup = 0, grpmod = 0;
+	bool igroup = false, grpmod = false;
 	uintptr_t gicr_base;
 
-	assert(gicv3_driver_data);
-	assert(gicv3_driver_data->gicd_base);
+	assert(gicv3_driver_data != NULL);
+	assert(gicv3_driver_data->gicd_base != 0U);
 	assert(proc_num < gicv3_driver_data->rdistif_num);
-	assert(gicv3_driver_data->rdistif_base_addrs);
+	assert(gicv3_driver_data->rdistif_base_addrs != NULL);
 
 	switch (type) {
 	case INTR_GROUP1S:
-		igroup = 0;
-		grpmod = 1;
+		igroup = false;
+		grpmod = true;
 		break;
 	case INTR_GROUP0:
-		igroup = 0;
-		grpmod = 0;
+		igroup = false;
+		grpmod = false;
 		break;
 	case INTR_GROUP1NS:
-		igroup = 1;
-		grpmod = 0;
+		igroup = true;
+		grpmod = false;
 		break;
 	default:
-		assert(0);
+		assert(false);
 		break;
 	}
 
@@ -1040,7 +1040,7 @@
  *
  * The target parameter must be a valid MPIDR in the system.
  ******************************************************************************/
-void gicv3_raise_secure_g0_sgi(int sgi_num, u_register_t target)
+void gicv3_raise_secure_g0_sgi(unsigned int sgi_num, u_register_t target)
 {
 	unsigned int tgt, aff3, aff2, aff1, aff0;
 	uint64_t sgi_val;
@@ -1059,7 +1059,7 @@
 	 * this PE.
 	 */
 	assert(aff0 < GICV3_MAX_SGI_TARGETS);
-	tgt = BIT(aff0);
+	tgt = BIT_32(aff0);
 
 	/* Raise SGI to PE specified by its affinity */
 	sgi_val = GICV3_SGIR_VALUE(aff3, aff2, aff1, sgi_num, SGIR_IRM_TO_AFF,
@@ -1090,11 +1090,11 @@
 	unsigned long long aff;
 	uint64_t router;
 
-	assert(gicv3_driver_data);
-	assert(gicv3_driver_data->gicd_base);
+	assert(gicv3_driver_data != NULL);
+	assert(gicv3_driver_data->gicd_base != 0U);
 
 	assert((irm == GICV3_IRM_ANY) || (irm == GICV3_IRM_PE));
-	assert(id >= MIN_SPI_ID && id <= MAX_SPI_ID);
+	assert((id >= MIN_SPI_ID) && (id <= MAX_SPI_ID));
 
 	aff = gicd_irouter_val_from_mpidr(mpidr, irm);
 	gicd_write_irouter(gicv3_driver_data->gicd_base, id, aff);
@@ -1105,7 +1105,7 @@
 	 */
 	if (irm == GICV3_IRM_ANY) {
 		router = gicd_read_irouter(gicv3_driver_data->gicd_base, id);
-		if (!((router >> IROUTER_IRM_SHIFT) & IROUTER_IRM_MASK)) {
+		if (((router >> IROUTER_IRM_SHIFT) & IROUTER_IRM_MASK) == 0U) {
 			ERROR("GICv3 implementation doesn't support routing ANY\n");
 			panic();
 		}
@@ -1119,10 +1119,10 @@
  ******************************************************************************/
 void gicv3_clear_interrupt_pending(unsigned int id, unsigned int proc_num)
 {
-	assert(gicv3_driver_data);
-	assert(gicv3_driver_data->gicd_base);
+	assert(gicv3_driver_data != NULL);
+	assert(gicv3_driver_data->gicd_base != 0U);
 	assert(proc_num < gicv3_driver_data->rdistif_num);
-	assert(gicv3_driver_data->rdistif_base_addrs);
+	assert(gicv3_driver_data->rdistif_base_addrs != NULL);
 
 	/*
 	 * Clear pending interrupt, and ensure that any shared variable updates
@@ -1145,10 +1145,10 @@
  ******************************************************************************/
 void gicv3_set_interrupt_pending(unsigned int id, unsigned int proc_num)
 {
-	assert(gicv3_driver_data);
-	assert(gicv3_driver_data->gicd_base);
+	assert(gicv3_driver_data != NULL);
+	assert(gicv3_driver_data->gicd_base != 0U);
 	assert(proc_num < gicv3_driver_data->rdistif_num);
-	assert(gicv3_driver_data->rdistif_base_addrs);
+	assert(gicv3_driver_data->rdistif_base_addrs != NULL);
 
 	/*
 	 * Ensure that any shared variable updates depending on out of band
@@ -1172,7 +1172,7 @@
 {
 	unsigned int old_mask;
 
-	old_mask = read_icc_pmr_el1();
+	old_mask = (uint32_t) read_icc_pmr_el1();
 
 	/*
 	 * Order memory updates w.r.t. PMR write, and ensure they're visible
diff --git a/drivers/arm/gic/v3/gicv3_private.h b/drivers/arm/gic/v3/gicv3_private.h
index f2b11d7..4564bb6 100644
--- a/drivers/arm/gic/v3/gicv3_private.h
+++ b/drivers/arm/gic/v3/gicv3_private.h
@@ -129,7 +129,7 @@
  */
 static inline void gicd_wait_for_pending_write(uintptr_t gicd_base)
 {
-	while (gicd_read_ctlr(gicd_base) & GICD_CTLR_RWP_BIT)
+	while ((gicd_read_ctlr(gicd_base) & GICD_CTLR_RWP_BIT) != 0U)
 		;
 }
 
@@ -157,7 +157,7 @@
 				 unsigned int rwp)
 {
 	gicd_write_ctlr(base, gicd_read_ctlr(base) & ~bitmap);
-	if (rwp)
+	if (rwp != 0U)
 		gicd_wait_for_pending_write(base);
 }
 
@@ -166,7 +166,7 @@
 				 unsigned int rwp)
 {
 	gicd_write_ctlr(base, gicd_read_ctlr(base) | bitmap);
-	if (rwp)
+	if (rwp != 0U)
 		gicd_wait_for_pending_write(base);
 }
 
@@ -207,13 +207,13 @@
  */
 static inline void gicr_wait_for_pending_write(uintptr_t gicr_base)
 {
-	while (gicr_read_ctlr(gicr_base) & GICR_CTLR_RWP_BIT)
+	while ((gicr_read_ctlr(gicr_base) & GICR_CTLR_RWP_BIT) != 0U)
 		;
 }
 
 static inline void gicr_wait_for_upstream_pending_write(uintptr_t gicr_base)
 {
-	while (gicr_read_ctlr(gicr_base) & GICR_CTLR_UWP_BIT)
+	while ((gicr_read_ctlr(gicr_base) & GICR_CTLR_UWP_BIT) != 0U)
 		;
 }
 
@@ -376,14 +376,14 @@
 
 static inline uint64_t gits_read_baser(uintptr_t base, unsigned int its_table_id)
 {
-	assert(its_table_id < 8);
-	return mmio_read_64(base + GITS_BASER + (8 * its_table_id));
+	assert(its_table_id < 8U);
+	return mmio_read_64(base + GITS_BASER + (8U * its_table_id));
 }
 
 static inline void gits_write_baser(uintptr_t base, unsigned int its_table_id, uint64_t val)
 {
-	assert(its_table_id < 8);
-	mmio_write_64(base + GITS_BASER + (8 * its_table_id), val);
+	assert(its_table_id < 8U);
+	mmio_write_64(base + GITS_BASER + (8U * its_table_id), val);
 }
 
 /*
@@ -391,8 +391,8 @@
  */
 static inline void gits_wait_for_quiescent_bit(uintptr_t gits_base)
 {
-	assert(!(gits_read_ctlr(gits_base) & GITS_CTLR_ENABLED_BIT));
-	while ((gits_read_ctlr(gits_base) & GITS_CTLR_QUIESCENT_BIT) == 0)
+	assert((gits_read_ctlr(gits_base) & GITS_CTLR_ENABLED_BIT) == 0U);
+	while ((gits_read_ctlr(gits_base) & GITS_CTLR_QUIESCENT_BIT) == 0U)
 		;
 }
 
diff --git a/include/drivers/arm/gicv3.h b/include/drivers/arm/gicv3.h
index edaf990..c9e28ba 100644
--- a/include/drivers/arm/gicv3.h
+++ b/include/drivers/arm/gicv3.h
@@ -420,7 +420,7 @@
 		unsigned int priority);
 void gicv3_set_interrupt_type(unsigned int id, unsigned int proc_num,
 		unsigned int type);
-void gicv3_raise_secure_g0_sgi(int sgi_num, u_register_t target);
+void gicv3_raise_secure_g0_sgi(unsigned int sgi_num, u_register_t target);
 void gicv3_set_spi_routing(unsigned int id, unsigned int irm,
 		u_register_t mpidr);
 void gicv3_set_interrupt_pending(unsigned int id, unsigned int proc_num);