Introduce some helper macros for exception vectors

This patch introduces some assembler macros to simplify the
declaration of the exception vectors. It abstracts the section
the exception code is put into as well as the alignments
constraints mandated by the ARMv8 architecture. For all TF images,
the exception code has been updated to make use of these macros.

This patch also updates some invalid comments in the exception
vector code.

Change-Id: I35737b8f1c8c24b6da89b0a954c8152a4096fa95

1 files changed, 22 insertions, 39 deletions

diff --git a/bl1/aarch64/bl1_exceptions.S b/bl1/aarch64/bl1_exceptions.S
index 9ff6a57b..68f9b7ae 100644
--- a/bl1/aarch64/bl1_exceptions.S
+++ b/bl1/aarch64/bl1_exceptions.S
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2013-2015, ARM Limited and Contributors. All rights reserved.
+ * Copyright (c) 2013-2016, ARM Limited and Contributors. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions are met:
@@ -34,42 +34,37 @@
 #include <bl1.h>
 #include <context.h>
 
+/* -----------------------------------------------------------------------------
+ * Very simple stackless exception handlers used by BL1.
+ * -----------------------------------------------------------------------------
+ */
 	.globl	bl1_exceptions
 
-	.section	.vectors, "ax"; .align 11
+vector_base bl1_exceptions
 
 	/* -----------------------------------------------------
-	 * Very simple stackless exception handlers used by BL1.
-	 * -----------------------------------------------------
-	 */
-	.align	7
-bl1_exceptions:
-	/* -----------------------------------------------------
 	 * Current EL with SP0 : 0x0 - 0x200
 	 * -----------------------------------------------------
 	 */
-SynchronousExceptionSP0:
+vector_entry SynchronousExceptionSP0
 	mov	x0, #SYNC_EXCEPTION_SP_EL0
 	bl	plat_report_exception
 	b	SynchronousExceptionSP0
 	check_vector_size SynchronousExceptionSP0
 
-	.align	7
-IrqSP0:
+vector_entry IrqSP0
 	mov	x0, #IRQ_SP_EL0
 	bl	plat_report_exception
 	b	IrqSP0
 	check_vector_size IrqSP0
 
-	.align	7
-FiqSP0:
+vector_entry FiqSP0
 	mov	x0, #FIQ_SP_EL0
 	bl	plat_report_exception
 	b	FiqSP0
 	check_vector_size FiqSP0
 
-	.align	7
-SErrorSP0:
+vector_entry SErrorSP0
 	mov	x0, #SERROR_SP_EL0
 	bl	plat_report_exception
 	b	SErrorSP0
@@ -79,29 +74,25 @@ SErrorSP0:
 	 * Current EL with SPx: 0x200 - 0x400
 	 * -----------------------------------------------------
 	 */
-	.align	7
-SynchronousExceptionSPx:
+vector_entry SynchronousExceptionSPx
 	mov	x0, #SYNC_EXCEPTION_SP_ELX
 	bl	plat_report_exception
 	b	SynchronousExceptionSPx
 	check_vector_size SynchronousExceptionSPx
 
-	.align	7
-IrqSPx:
+vector_entry IrqSPx
 	mov	x0, #IRQ_SP_ELX
 	bl	plat_report_exception
 	b	IrqSPx
 	check_vector_size IrqSPx
 
-	.align	7
-FiqSPx:
+vector_entry FiqSPx
 	mov	x0, #FIQ_SP_ELX
 	bl	plat_report_exception
 	b	FiqSPx
 	check_vector_size FiqSPx
 
-	.align	7
-SErrorSPx:
+vector_entry SErrorSPx
 	mov	x0, #SERROR_SP_ELX
 	bl	plat_report_exception
 	b	SErrorSPx
@@ -111,8 +102,7 @@ SErrorSPx:
 	 * Lower EL using AArch64 : 0x400 - 0x600
 	 * -----------------------------------------------------
 	 */
-	.align	7
-SynchronousExceptionA64:
+vector_entry SynchronousExceptionA64
 	/* Enable the SError interrupt */
 	msr	daifclr, #DAIF_ABT_BIT
 
@@ -127,22 +117,19 @@ SynchronousExceptionA64:
 	b	smc_handler64
 	check_vector_size SynchronousExceptionA64
 
-	.align	7
-IrqA64:
+vector_entry IrqA64
 	mov	x0, #IRQ_AARCH64
 	bl	plat_report_exception
 	b	IrqA64
 	check_vector_size IrqA64
 
-	.align	7
-FiqA64:
+vector_entry FiqA64
 	mov	x0, #FIQ_AARCH64
 	bl	plat_report_exception
 	b	FiqA64
 	check_vector_size FiqA64
 
-	.align	7
-SErrorA64:
+vector_entry SErrorA64
 	mov	x0, #SERROR_AARCH64
 	bl	plat_report_exception
 	b   	SErrorA64
@@ -152,29 +139,25 @@ SErrorA64:
 	 * Lower EL using AArch32 : 0x600 - 0x800
 	 * -----------------------------------------------------
 	 */
-	.align	7
-SynchronousExceptionA32:
+vector_entry SynchronousExceptionA32
 	mov	x0, #SYNC_EXCEPTION_AARCH32
 	bl	plat_report_exception
 	b	SynchronousExceptionA32
 	check_vector_size SynchronousExceptionA32
 
-	.align	7
-IrqA32:
+vector_entry IrqA32
 	mov	x0, #IRQ_AARCH32
 	bl	plat_report_exception
 	b	IrqA32
 	check_vector_size IrqA32
 
-	.align	7
-FiqA32:
+vector_entry FiqA32
 	mov	x0, #FIQ_AARCH32
 	bl	plat_report_exception
 	b	FiqA32
 	check_vector_size FiqA32
 
-	.align	7
-SErrorA32:
+vector_entry SErrorA32
 	mov	x0, #SERROR_AARCH32
 	bl	plat_report_exception
 	b	SErrorA32