Add new version of image loading.
This patch adds capability to load BL images based on image
descriptors instead of hard coded way of loading BL images.
This framework is designed such that it can be readily adapted
by any BL stage that needs to load images.
In order to provide the above capability the following new
platform functions are introduced:
bl_load_info_t *plat_get_bl_image_load_info(void);
This function returns pointer to the list of images that the
platform has populated to load.
bl_params_t *plat_get_next_bl_params(void);
This function returns a pointer to the shared memory that the
platform has kept aside to pass trusted firmware related
information that next BL image needs.
void plat_flush_next_bl_params(void);
This function flushes to main memory all the params that
are passed to next image.
int bl2_plat_handle_post_image_load(unsigned int image_id)
This function can be used by the platforms to update/use
image information for given `image_id`.
`desc_image_load.c` contains utility functions which can be used
by the platforms to generate, load and executable, image list
based on the registered image descriptors.
This patch also adds new version of `load_image/load_auth_image`
functions in-order to achieve the above capability.
Following are the changes for the new version as compared to old:
- Refactor the signature and only keep image_id and image_info_t
arguments. Removed image_base argument as it is already passed
through image_info_t. Given that the BL image base addresses and
limit/size are already provided by the platforms, the meminfo_t
and entry_point_info arguments are not needed to provide/reserve
the extent of free memory for the given BL image.
- Added check for the image size against the defined max size.
This is needed because the image size could come from an
unauthenticated source (e.g. the FIP header).
To make this check, new member is added to the image_info_t
struct for identifying the image maximum size.
New flag `LOAD_IMAGE_V2` is added in the Makefile.
Default value is 0.
NOTE: `TRUSTED_BOARD_BOOT` is currently not supported when
`LOAD_IMAGE_V2` is enabled.
Change-Id: Ia7b643f4817a170d5a2fbf479b9bc12e63112e79
diff --git a/Makefile b/Makefile
index 49d7cc4..376db8d 100644
--- a/Makefile
+++ b/Makefile
@@ -115,7 +115,8 @@
# Whether code and read-only data should be put on separate memory pages.
# The platform Makefile is free to override this value.
SEPARATE_CODE_AND_RODATA := 0
-
+# Flag to enable new version of image loading
+LOAD_IMAGE_V2 := 0
################################################################################
# Checkpatch script options
@@ -355,6 +356,13 @@
endif
endif
+# TRUSTED_BOARD_BOOT is currently not supported when LOAD_IMAGE_V2 is enabled.
+ifeq (${LOAD_IMAGE_V2},1)
+ ifeq (${TRUSTED_BOARD_BOOT},1)
+ $(error "TRUSTED_BOARD_BOOT is currently not supported \
+ for LOAD_IMAGE_V2=1")
+ endif
+endif
################################################################################
# Process platform overrideable behaviour
@@ -445,6 +453,7 @@
$(eval $(call assert_boolean,ENABLE_PMF))
$(eval $(call assert_boolean,ENABLE_PSCI_STAT))
$(eval $(call assert_boolean,SEPARATE_CODE_AND_RODATA))
+$(eval $(call assert_boolean,LOAD_IMAGE_V2))
################################################################################
@@ -475,6 +484,7 @@
$(eval $(call add_define,ENABLE_PMF))
$(eval $(call add_define,ENABLE_PSCI_STAT))
$(eval $(call add_define,SEPARATE_CODE_AND_RODATA))
+$(eval $(call add_define,LOAD_IMAGE_V2))
# Define the EL3_PAYLOAD_BASE flag only if it is provided.
ifdef EL3_PAYLOAD_BASE
$(eval $(call add_define,EL3_PAYLOAD_BASE))