bl1: add bl1_plat_handle_{pre,post}_image_load()

Just like bl2_, add pre/post image load handlers for BL1.  No argument
is needed since BL2 is the only image loaded by BL1.
Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>

bl1/bl1_main.c

 /*
- * Copyright (c) 2013-2017, ARM Limited and Contributors. All rights reserved.
+ * Copyright (c) 2013-2018, ARM Limited and Contributors. All rights reserved.
  *
  * SPDX-License-Identifier: BSD-3-Clause
  */
@@ -178,6 +178,12 @@ void bl1_load_bl2(void)
 	INFO("BL1: Loading BL2\n");
 
 #if LOAD_IMAGE_V2
+	err = bl1_plat_handle_pre_image_load();
+	if (err) {
+		ERROR("Failure in pre image load handling of BL2 (%d)\n", err);
+		plat_error_handler(err);
+	}
+
 	err = load_auth_image(BL2_IMAGE_ID, image_info);
 #else
 	/* Load the BL2 image */
@@ -194,6 +200,14 @@ void bl1_load_bl2(void)
 		plat_error_handler(err);
 	}
 
+#if LOAD_IMAGE_V2
+	/* Allow platform to handle image information. */
+	err = bl1_plat_handle_post_image_load();
+	if (err) {
+		ERROR("Failure in post image load handling of BL2 (%d)\n", err);
+		plat_error_handler(err);
+	}
+
 	/*
 	 * Create a new layout of memory for BL2 as seen by BL1 i.e.
 	 * tell it the amount of total and free memory available.
@@ -201,7 +215,6 @@ void bl1_load_bl2(void)
 	 * to BL2. BL2 will read the memory layout before using its
 	 * memory for other purposes.
 	 */
-#if LOAD_IMAGE_V2
 	bl2_tzram_layout = (meminfo_t *) bl1_tzram_layout->total_base;
 #else
 	bl2_tzram_layout = (meminfo_t *) bl1_tzram_layout->free_base;

docs/porting-guide.rst

@@ -1259,6 +1259,30 @@ standard platforms return an image descriptor corresponding to BL2 or one of
 the firmware update images defined in the Trusted Board Boot Requirements
 specification.
 
+Function : bl1\_plat\_handle\_pre\_image\_load() [optional]
+~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+
+::
+
+    Argument : void
+    Return   : int
+
+This function can be used by the platforms to update/use image information
+for BL2. This function is currently invoked in BL1 before loading BL2,
+when LOAD\_IMAGE\_V2 is enabled.
+
+Function : bl1\_plat\_handle\_post\_image\_load() [optional]
+~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+
+::
+
+    Argument : void
+    Return   : int
+
+This function can be used by the platforms to update/use image information
+for BL2. This function is currently invoked in BL1 after loading BL2,
+when LOAD\_IMAGE\_V2 is enabled.
+
 Function : bl1\_plat\_fwu\_done() [optional]
 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
 

include/plat/common/platform.h

@@ -155,6 +155,15 @@ struct image_desc *bl1_plat_get_image_desc(unsigned int image_id);
  */
 __dead2 void bl1_plat_fwu_done(void *client_cookie, void *reserved);
 
+#if LOAD_IMAGE_V2
+/*
+ * This function can be used by the platforms to update/use image
+ * information for BL2.
+ */
+int bl1_plat_handle_pre_image_load(void);
+int bl1_plat_handle_post_image_load(void);
+
+#endif /* LOAD_IMAGE_V2 */
 
 /*******************************************************************************
  * Mandatory BL2 functions

plat/common/platform_helpers_default.c

@@ -12,6 +12,8 @@
  */
 
 #pragma weak plat_error_handler
+#pragma weak bl1_plat_handle_pre_image_load
+#pragma weak bl1_plat_handle_post_image_load
 #pragma weak bl2_plat_preload_setup
 #pragma weak bl2_plat_handle_pre_image_load
 #pragma weak bl2_plat_handle_post_image_load
@@ -23,6 +25,16 @@ void __dead2 plat_error_handler(int err)
 		wfi();
 }
 
+int bl1_plat_handle_pre_image_load(void)
+{
+	return 0;
+}
+
+int bl1_plat_handle_post_image_load(void)
+{
+	return 0;
+}
+
 void bl2_plat_preload_setup(void)
 {
 }