juno: Place assembler functions in separate sections

This extends the --gc-sections behaviour to the Juno-specific assembler
support functions in the firmware images by placing each function
into its own code section. This is achieved by using the 'func'
macro when declaring a function label.

Change-Id: I738370c0515face104531ab7944cc5bbdad49a9d

plat/juno/aarch64/bl1_plat_helpers.S

@@ -30,15 +30,13 @@
 
 #include <arch.h>
 #include <platform.h>
+#include <asm_macros.S>
 
 	.globl	platform_get_entrypoint
 	.globl	platform_cold_boot_init
 	.globl	plat_secondary_cold_boot_setup
 
 
-	.section	.text, "ax"; .align 3
-
-
 	/* -----------------------------------------------------
 	 * void plat_secondary_cold_boot_setup (void);
 	 *
@@ -48,7 +46,7 @@
 	 * holding pen etc.
 	 * -----------------------------------------------------
 	 */
-plat_secondary_cold_boot_setup: ; .type plat_secondary_cold_boot_setup, %function
+func plat_secondary_cold_boot_setup
 	/* Juno todo: Implement secondary CPU cold boot setup on Juno */
 cb_panic:
 	b	cb_panic
@@ -69,7 +67,7 @@ cb_panic:
 	 * TODO: Not a good idea to save lr in a temp reg
 	 * -----------------------------------------------------
 	 */
-platform_get_entrypoint: ; .type platform_get_entrypoint, %function
+func platform_get_entrypoint
 	mov	x9, x30 // lr
 	bl	platform_get_core_pos
 	ldr	x1, =TRUSTED_MAILBOXES_BASE
@@ -85,7 +83,7 @@ platform_get_entrypoint: ; .type platform_get_entrypoint, %function
 	 * boot to perform early platform initialization
 	 * -----------------------------------------------------
 	 */
-platform_cold_boot_init: ; .type platform_cold_boot_init, %function
+func platform_cold_boot_init
 	mov	x20, x0
 	bl	read_mpidr
 	mov	x19, x0

plat/juno/aarch64/plat_helpers.S

@@ -30,11 +30,10 @@
 
 #include <arch.h>
 #include <platform.h>
+#include <asm_macros.S>
 
 	.globl	plat_report_exception
 
-	.section	.text, "ax"
-
 	/* ---------------------------------------------
 	 * void plat_report_exception(unsigned int type)
 	 * Function to report an unhandled exception
@@ -43,7 +42,7 @@
 	 * to indicate where we are
 	 * ---------------------------------------------
 	 */
-plat_report_exception:
+func plat_report_exception
 	mrs	x1, CurrentEl
 	lsr	x1, x1, #MODE_EL_SHIFT
 	lsl	x1, x1, #SYS_LED_EL_SHIFT
@@ -60,7 +59,7 @@ plat_report_exception:
 	 * Return 0 to 3 for the A53s and 4 or 5 for the A57s
 	 */
 	.globl	platform_get_core_pos
-platform_get_core_pos:; .type platform_get_core_pos, %function
+func platform_get_core_pos
 	and	x1, x0, #MPIDR_CPU_MASK
 	and	x0, x0, #MPIDR_CLUSTER_MASK
 	eor	x0, x0, #(1 << MPIDR_AFFINITY_BITS)  // swap A53/A57 order
@@ -76,7 +75,7 @@ platform_get_core_pos:; .type platform_get_core_pos, %function
 	 * -----------------------------------------------------
 	 */
 	.globl	platform_is_primary_cpu
-platform_is_primary_cpu:; .type platform_is_primary_cpu, %function
+func platform_is_primary_cpu
 	/* Warning: this function is called without a valid stack */
 	/* Juno todo: allow configuration of primary CPU using SCC */
 	and	x0, x0, #(MPIDR_CLUSTER_MASK | MPIDR_CPU_MASK)