feat(stm32mp1): add support for reading the metadata partition
Add support for reading the FWU metadata partition. The metadata
partition stores information on the current active bank along with
information on all the FWU updatable images on the platform. This
information is then used to identify the image to be booted.
Signed-off-by: Sughosh Ganu <sughosh.ganu@linaro.org>
Change-Id: I66bc5ac718c21a49c504e698b5b1f5c4daed2d08
diff --git a/plat/st/common/bl2_io_storage.c b/plat/st/common/bl2_io_storage.c
index 96921e0..e129dfd 100644
--- a/plat/st/common/bl2_io_storage.c
+++ b/plat/st/common/bl2_io_storage.c
@@ -548,4 +548,51 @@
image_spec->length = entry->length;
}
}
+
+static int plat_set_image_source(unsigned int image_id,
+ uintptr_t *handle,
+ uintptr_t *image_spec,
+ const char *part_name)
+{
+ struct plat_io_policy *policy;
+ io_block_spec_t *spec;
+ const partition_entry_t *entry = get_partition_entry(part_name);
+
+ if (entry == NULL) {
+ ERROR("Unable to find the %s partition\n", part_name);
+ return -ENOENT;
+ }
+
+ policy = &policies[image_id];
+
+ spec = (io_block_spec_t *)policy->image_spec;
+ spec->offset = entry->start;
+ spec->length = entry->length;
+
+ *image_spec = policy->image_spec;
+ *handle = *policy->dev_handle;
+
+ return 0;
+}
+
+int plat_fwu_set_metadata_image_source(unsigned int image_id,
+ uintptr_t *handle,
+ uintptr_t *image_spec)
+{
+ char *part_name;
+
+ assert((image_id == FWU_METADATA_IMAGE_ID) ||
+ (image_id == BKUP_FWU_METADATA_IMAGE_ID));
+
+ partition_init(GPT_IMAGE_ID);
+
+ if (image_id == FWU_METADATA_IMAGE_ID) {
+ part_name = METADATA_PART_1;
+ } else {
+ part_name = METADATA_PART_2;
+ }
+
+ return plat_set_image_source(image_id, handle, image_spec,
+ part_name);
+}
#endif /* (STM32MP_SDMMC || STM32MP_EMMC) && PSA_FWU_SUPPORT */