Refactor SPSR initialisation code

Change-Id: Ic3b30de13e314efca30fc71370227d3e76f1148b
Signed-off-by: John Tsichritzis <john.tsichritzis@arm.com>

bl1/aarch32/bl1_context_mgmt.c

@@ -102,7 +102,7 @@ static void flush_smc_and_cpu_ctx(void)
  ******************************************************************************/
 void bl1_prepare_next_image(unsigned int image_id)
 {
-	unsigned int security_state;
+	unsigned int security_state, mode = MODE32_svc;
 	image_desc_t *image_desc;
 	entry_point_info_t *next_bl_ep;
 
@@ -117,20 +117,13 @@ void bl1_prepare_next_image(unsigned int image_id)
 	security_state = GET_SECURITY_STATE(next_bl_ep->h.attr);
 
 	/* Prepare the SPSR for the next BL image. */
-	if (security_state == SECURE) {
-		next_bl_ep->spsr = SPSR_MODE32(MODE32_svc, SPSR_T_ARM,
-			SPSR_E_LITTLE, DISABLE_ALL_EXCEPTIONS);
-	} else {
-		/* Use HYP mode if supported else use SVC. */
-		if (GET_VIRT_EXT(read_id_pfr1())) {
-			next_bl_ep->spsr = SPSR_MODE32(MODE32_hyp, SPSR_T_ARM,
-				SPSR_E_LITTLE, DISABLE_ALL_EXCEPTIONS);
-		} else {
-			next_bl_ep->spsr = SPSR_MODE32(MODE32_svc, SPSR_T_ARM,
-				SPSR_E_LITTLE, DISABLE_ALL_EXCEPTIONS);
-		}
+	if ((security_state != SECURE) && (GET_VIRT_EXT(read_id_pfr1()))) {
+		mode = MODE32_hyp;
 	}
 
+	next_bl_ep->spsr = SPSR_MODE32(mode, SPSR_T_ARM,
+				SPSR_E_LITTLE, DISABLE_ALL_EXCEPTIONS);
+
 	/* Allow platform to make change */
 	bl1_plat_set_ep_info(image_id, next_bl_ep);
 

bl1/aarch64/bl1_context_mgmt.c

@@ -42,7 +42,7 @@ void cm_set_context(void *context, uint32_t security_state)
  ******************************************************************************/
 void bl1_prepare_next_image(unsigned int image_id)
 {
-	unsigned int security_state;
+	unsigned int security_state, mode = MODE_EL1;
 	image_desc_t *image_desc;
 	entry_point_info_t *next_bl_ep;
 
@@ -73,20 +73,13 @@ void bl1_prepare_next_image(unsigned int image_id)
 		cm_set_context(&bl1_cpu_context[security_state], security_state);
 
 	/* Prepare the SPSR for the next BL image. */
-	if (security_state == SECURE) {
-		next_bl_ep->spsr = SPSR_64(MODE_EL1, MODE_SP_ELX,
-				   DISABLE_ALL_EXCEPTIONS);
-	} else {
-		/* Use EL2 if supported; else use EL1. */
-		if (el_implemented(2) != EL_IMPL_NONE) {
-			next_bl_ep->spsr = SPSR_64(MODE_EL2, MODE_SP_ELX,
-				DISABLE_ALL_EXCEPTIONS);
-		} else {
-			next_bl_ep->spsr = SPSR_64(MODE_EL1, MODE_SP_ELX,
-			   DISABLE_ALL_EXCEPTIONS);
-		}
+	if ((security_state != SECURE) && (el_implemented(2) != EL_IMPL_NONE)) {
+		mode = MODE_EL2;
 	}
 
+	next_bl_ep->spsr = SPSR_64(mode, MODE_SP_ELX,
+		DISABLE_ALL_EXCEPTIONS);
+
 	/* Allow platform to make change */
 	bl1_plat_set_ep_info(image_id, next_bl_ep);