[U-Boot] [PATCH 4/9] optee: Add optee_image_get_entry_point()

[Bryan O'Donoghue]

Add a helper function for extracting the least significant 32 bits from the
OPTEE entry point address, which will be good enough to load OPTEE binaries
up to (2^32)-1 bytes.

We may need to extend this out later on but for now (2^32)-1 should be
fine.

Signed-off-by: Bryan O'Donoghue <bryan.odonoghue at linaro.org>
Cc: Harinarayan Bhatta <harinarayan at ti.com>
Cc: Andrew F. Davis <afd at ti.com>
Cc: Tom Rini <trini at konsulko.com>
Cc: Kever Yang <kever.yang at rock-chips.com>
Cc: Philipp Tomsich <philipp.tomsich at theobroma-systems.com>
Cc: Peng Fan <peng.fan at nxp.com>
---
 include/tee/optee.h | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/include/tee/optee.h b/include/tee/optee.h
index 8943afb..eb328d3 100644
--- a/include/tee/optee.h
+++ b/include/tee/optee.h
@@ -29,6 +29,13 @@ struct optee_header {
 	uint32_t paged_size;
 };
 
+static inline uint32_t optee_image_get_entry_point(const image_header_t *hdr)
+{
+	struct optee_header *optee_hdr = (struct optee_header *)(hdr + 1);
+
+	return optee_hdr->init_load_addr_lo;
+}
+
 #if defined(CONFIG_OPTEE)
 int optee_verify_image(struct optee_header *hdr, unsigned long tzdram_start,
 		       unsigned long tzdram_len, unsigned long image_len);
-- 
2.7.4