Populate BL31 input parameters as per new spec

This patch is based on spec published at
https://github.com/ARM-software/tf-issues/issues/133

It rearranges the bl31_args struct into
bl31_params and bl31_plat_params which provide the
information needed for Trusted firmware and platform
specific data via x0 and x1

On the FVP platform BL3-1 params and BL3-1 plat params
and its constituents are stored at the start of TZDRAM.

The information about memory availability and size for
BL3-1, BL3-2 and BL3-3 is moved into platform specific data.

Change-Id: I8b32057a3d0dd3968ea26c2541a0714177820da9
diff --git a/bl31/aarch64/bl31_entrypoint.S b/bl31/aarch64/bl31_entrypoint.S
index 701bca3..c67d029 100644
--- a/bl31/aarch64/bl31_entrypoint.S
+++ b/bl31/aarch64/bl31_entrypoint.S
@@ -44,11 +44,11 @@
 	 */
 
 func bl31_entrypoint
-	/* ---------------------------------------------
-	 * Preceding bootloader has populated x0 with a
-	 * pointer to a 'bl31_args' structure & x1
- 	 * with any other optional information
-	 * ---------------------------------------------
+	/* ---------------------------------------------------------------
+	 * Preceding bootloader has populated x0 with a pointer to a
+	 * 'bl31_params' structure & x1 with a pointer to platform
+	 * specific structure
+	 * ---------------------------------------------------------------
 	 */
 	mov	x20, x0
 	mov	x21, x1
diff --git a/bl31/bl31_main.c b/bl31/bl31_main.c
index 5a09829..d74b254 100644
--- a/bl31/bl31_main.c
+++ b/bl31/bl31_main.c
@@ -152,7 +152,7 @@
  ******************************************************************************/
 void bl31_prepare_next_image_entry()
 {
-	el_change_info_t *next_image_info;
+	entry_point_info_t *next_image_info;
 	uint32_t scr, image_type;
 
 	/* Determine which image to execute next */
@@ -176,13 +176,13 @@
 	 * Tell the context mgmt. library to ensure that SP_EL3 points to
 	 * the right context to exit from EL3 correctly.
 	 */
-	cm_set_el3_eret_context(next_image_info->security_state,
-			next_image_info->entrypoint,
+	cm_set_el3_eret_context(GET_SECURITY_STATE(next_image_info->h.attr),
+			next_image_info->pc,
 			next_image_info->spsr,
 			scr);
 
 	/* Finally set the next context */
-	cm_set_next_eret_context(next_image_info->security_state);
+	cm_set_next_eret_context(GET_SECURITY_STATE(next_image_info->h.attr));
 }
 
 /*******************************************************************************