feat(plat/rcar3): add optional support for gzip-compressed BL33
The BL33 size on this platform is limited to 1 MiB, add optional
support for decompressing and starting gzip-compressed BL33, which
may help with this size limitation. This functionality is disabled
by default, set RCAR_GEN3_BL33_GZIP=1 during build to enable it.
The BL33 at 0x50000000 should then be gzip compressed, however if
the BL33 does not have a valid gzip header, it is copied to the
correct location and started as-is, this is a fallback for legacy
systems and systems which update to gzip-compressed BL33.
Signed-off-by: Marek Vasut <marek.vasut+renesas@gmail.com>
Change-Id: Id93f1c7e6f17db1ffb952ea086562993473f6efa
diff --git a/plat/renesas/rcar/platform.mk b/plat/renesas/rcar/platform.mk
index 7a7a56c..11de559 100644
--- a/plat/renesas/rcar/platform.mk
+++ b/plat/renesas/rcar/platform.mk
@@ -280,6 +280,11 @@
endif
$(eval $(call add_define,RCAR_SYSTEM_RESET_KEEPON_DDR))
+ifndef RCAR_GEN3_BL33_GZIP
+RCAR_GEN3_BL33_GZIP := 0
+endif
+$(eval $(call add_define,RCAR_GEN3_BL33_GZIP))
+
# RCAR_SYSTEM_RESET_KEEPON_DDR requires power control of PMIC etc.
# When executing SYSTEM_SUSPEND other than Salvator-X, Salvator-XS and Ebisu,
# processing equivalent to that implemented in PMIC_ROHM_BD9571 is necessary.
@@ -315,6 +320,13 @@
BL2_SOURCES += plat/renesas/rcar/bl2_plat_setup.c \
drivers/renesas/rcar/board/board.c
+ifeq (${RCAR_GEN3_BL33_GZIP},1)
+include lib/zlib/zlib.mk
+
+BL2_SOURCES += common/image_decompress.c \
+ $(ZLIB_SOURCES)
+endif
+
ifeq (${RCAR_GEN3_ULCB},1)
BL31_SOURCES += drivers/renesas/rcar/cpld/ulcb_cpld.c
endif