bl2: add bl2_plat_handle_pre_image_load()
There are cases where we need to manipulate image information before
the load. For example, for decompressing data, we cannot load the
compressed images to their final destination. Instead, we need to
load them to the temporary buffer for the decompressor.
Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
diff --git a/docs/porting-guide.rst b/docs/porting-guide.rst
index 7683ded..57da340 100644
--- a/docs/porting-guide.rst
+++ b/docs/porting-guide.rst
@@ -1424,10 +1424,10 @@
populated with the extents of secure RAM available for BL2 to use. See
``bl2_early_platform_setup()`` above.
-Following function is required only when LOAD\_IMAGE\_V2 is enabled.
+Following functions are optionally used only when LOAD\_IMAGE\_V2 is enabled.
-Function : bl2\_plat\_handle\_post\_image\_load() [mandatory]
-~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+Function : bl2\_plat\_handle\_pre\_image\_load() [optional]
+~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
::
@@ -1435,9 +1435,20 @@
Return : int
This function can be used by the platforms to update/use image information
-for given ``image_id``. This function is currently invoked in BL2 to handle
-BL image specific information based on the ``image_id`` passed, when
-LOAD\_IMAGE\_V2 is enabled.
+for given ``image_id``. This function is currently invoked in BL2 before
+loading each image, when LOAD\_IMAGE\_V2 is enabled.
+
+Function : bl2\_plat\_handle\_post\_image\_load() [optional]
+~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+
+::
+
+ Argument : unsigned int
+ Return : int
+
+This function can be used by the platforms to update/use image information
+for given ``image_id``. This function is currently invoked in BL2 after
+loading each image, when LOAD\_IMAGE\_V2 is enabled.
Following functions are required only when LOAD\_IMAGE\_V2 is disabled.