Introduce print_entry_point_info() function

This patch introduces a new function called 'print_entry_point_info'
that prints an entry_point_t structure for debugging purposes.
As such, it can be used to display the entry point address, SPSR and
arguments passed from a firmware image to the next one.

This function is now called in the following images transitions:
 - BL1 to BL2
 - BL1 to BL31
 - BL31 to the next image (typically BL32 or BL33)

The following changes have been introduced:

 - Fix the output format of the SPSR value : SPSR is a 32-bit value,
   not a 64-bit one.

 - Print all arguments values.
   The entry_point_info_t structure allows to pass up to 8 arguments.
   In most cases, only the first 2 arguments were printed.
   print_entry_point_info() now prints all of them as 'VERBOSE'
   traces.

Change-Id: Ieb384bffaa7849e6cb95a01a47c0b7fc2308653a

4 files changed, 31 insertions, 18 deletions

diff --git a/bl1/bl1_main.c b/bl1/bl1_main.c
index 50cf4e0d..50aed600 100644
--- a/bl1/bl1_main.c
+++ b/bl1/bl1_main.c
@@ -57,6 +57,9 @@ static void __dead2 bl1_run_bl2(entry_point_info_t *bl2_ep)
 	write_spsr_el3(bl2_ep->spsr);
 	write_elr_el3(bl2_ep->pc);
 
+	NOTICE("BL1: Booting BL2\n");
+	print_entry_point_info(bl2_ep);
+
 	eret(bl2_ep->args.arg0,
 		bl2_ep->args.arg1,
 		bl2_ep->args.arg2,
@@ -190,13 +193,6 @@ void bl1_main(void)
 
 	bl1_plat_set_bl2_ep_info(&bl2_image_info, &bl2_ep);
 	bl2_ep.args.arg1 = (unsigned long)bl2_tzram_layout;
-	NOTICE("BL1: Booting BL2\n");
-	INFO("BL1: BL2 address = 0x%llx\n",
-		(unsigned long long) bl2_ep.pc);
-	INFO("BL1: BL2 spsr = 0x%x\n", bl2_ep.spsr);
-	VERBOSE("BL1: BL2 memory layout address = 0x%llx\n",
-		(unsigned long long) bl2_tzram_layout);
-
 	bl1_run_bl2(&bl2_ep);
 
 	return;
@@ -209,12 +205,5 @@ void bl1_main(void)
 void display_boot_progress(entry_point_info_t *bl31_ep_info)
 {
 	NOTICE("BL1: Booting BL3-1\n");
-	INFO("BL1: BL3-1 address = 0x%llx\n",
-		(unsigned long long)bl31_ep_info->pc);
-	INFO("BL1: BL3-1 spsr = 0x%llx\n",
-		(unsigned long long)bl31_ep_info->spsr);
-	INFO("BL1: BL3-1 params address = 0x%llx\n",
-		(unsigned long long)bl31_ep_info->args.arg0);
-	INFO("BL1: BL3-1 plat params address = 0x%llx\n",
-		(unsigned long long)bl31_ep_info->args.arg1);
+	print_entry_point_info(bl31_ep_info);
 }
diff --git a/bl31/bl31_main.c b/bl31/bl31_main.c
index a244a5cc..9abc395b 100644
--- a/bl31/bl31_main.c
+++ b/bl31/bl31_main.c
@@ -149,9 +149,7 @@ void bl31_prepare_next_image_entry(void)
 
 	INFO("BL3-1: Preparing for EL3 exit to %s world\n",
 		(image_type == SECURE) ? "secure" : "normal");
-	INFO("BL3-1: Next image address = 0x%llx\n",
-		(unsigned long long) next_image_info->pc);
-	INFO("BL3-1: Next image spsr = 0x%x\n", next_image_info->spsr);
+	print_entry_point_info(next_image_info);
 	cm_init_my_context(next_image_info);
 	cm_prepare_el3_exit(image_type);
 }
diff --git a/common/bl_common.c b/common/bl_common.c
index 91a0ae8c..1cf0b23b 100644
--- a/common/bl_common.c
+++ b/common/bl_common.c
@@ -352,3 +352,27 @@ int load_auth_image(meminfo_t *mem_layout,
 
 	return 0;
 }
+
+/*******************************************************************************
+ * Print the content of an entry_point_info_t structure.
+ ******************************************************************************/
+void print_entry_point_info(const entry_point_info_t *ep_info)
+{
+	INFO("Entry point address = 0x%llx\n",
+		(unsigned long long) ep_info->pc);
+	INFO("SPSR = 0x%lx\n", (unsigned long) ep_info->spsr);
+
+#define PRINT_IMAGE_ARG(n)					\
+	VERBOSE("Argument #" #n " = 0x%llx\n",			\
+		(unsigned long long) ep_info->args.arg##n)
+
+	PRINT_IMAGE_ARG(0);
+	PRINT_IMAGE_ARG(1);
+	PRINT_IMAGE_ARG(2);
+	PRINT_IMAGE_ARG(3);
+	PRINT_IMAGE_ARG(4);
+	PRINT_IMAGE_ARG(5);
+	PRINT_IMAGE_ARG(6);
+	PRINT_IMAGE_ARG(7);
+#undef PRINT_IMAGE_ARG
+}
diff --git a/include/common/bl_common.h b/include/common/bl_common.h
index c687b354..c9a7a3da 100644
--- a/include/common/bl_common.h
+++ b/include/common/bl_common.h
@@ -242,6 +242,8 @@ extern const char version_string[];
 void reserve_mem(uint64_t *free_base, size_t *free_size,
 		uint64_t addr, size_t size);
 
+void print_entry_point_info(const entry_point_info_t *ep_info);
+
 #endif /*__ASSEMBLY__*/
 
 #endif /* __BL_COMMON_H__ */