uniphier: support GZIP-compressed images

Allow to handle GZIP-compressed images by giving FIP_GZIP=1 from the
command line.

- Images are GZIP-compressed, then packed into FIP.  If Trusted Board
  Boot is enabled, certificates are generated based on the compressed
  images.

- GZIP decompressor is linked into BL2 to decompress images at
  run-time.
Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>

plat/socionext/uniphier/platform.mk

@@ -103,6 +103,23 @@ $(ROTPK_HASH): $(ROT_KEY)
 
 endif
 
+ifeq (${FIP_GZIP},1)
+
+include lib/zlib/zlib.mk
+
+BL2_SOURCES		+=	common/image_decompress.c		\
+				$(ZLIB_SOURCES)
+
+$(eval $(call add_define,UNIPHIER_DECOMPRESS_GZIP))
+
+# compress all images loaded by BL2
+SCP_BL2_PRE_TOOL_FILTER	:= GZIP
+BL31_PRE_TOOL_FILTER	:= GZIP
+BL32_PRE_TOOL_FILTER	:= GZIP
+BL33_PRE_TOOL_FILTER	:= GZIP
+
+endif
+
 .PHONY: bl2_gzip
 bl2_gzip: $(BUILD_PLAT)/bl2.bin.gz
 %.gz: %

plat/socionext/uniphier/uniphier.h

@@ -82,7 +82,11 @@ unsigned int uniphier_calc_core_pos(u_register_t mpidr);
 
 #define UNIPHIER_BLOCK_BUF_BASE		((UNIPHIER_SCP_BASE) + \
 					 (UNIPHIER_SCP_MAX_SIZE))
-#define UNIPHIER_BLOCK_BUF_SIZE		((UNIPHIER_NS_DRAM_LIMIT) - \
-					 (UNIPHIER_BLOCK_BUF_BASE))
+#define UNIPHIER_BLOCK_BUF_SIZE		0x00100000
+
+#define UNIPHIER_IMAGE_BUF_BASE		((UNIPHIER_BLOCK_BUF_BASE) + \
+					 (UNIPHIER_BLOCK_BUF_SIZE))
+#define UNIPHIER_IMAGE_BUF_SIZE		((UNIPHIER_NS_DRAM_LIMIT) - \
+					 (UNIPHIER_IMAGE_BUF_BASE))
 
 #endif /* __UNIPHIER_H__ */

plat/socionext/uniphier/uniphier_bl2_setup.c

@@ -9,8 +9,12 @@
 #include <desc_image_load.h>
 #include <errno.h>
 #include <io/io_storage.h>
+#include <image_decompress.h>
 #include <platform.h>
 #include <platform_def.h>
+#ifdef UNIPHIER_DECOMPRESS_GZIP
+#include <tf_gunzip.h>
+#endif
 #include <xlat_tables_v2.h>
 
 #include "uniphier.h"
@@ -115,8 +119,38 @@ bl_params_t *plat_get_next_bl_params(void)
 	return get_next_bl_params_from_mem_params_desc();
 }
 
+void bl2_plat_preload_setup(void)
+{
+#ifdef UNIPHIER_DECOMPRESS_GZIP
+	image_decompress_init(UNIPHIER_IMAGE_BUF_BASE,
+			      UNIPHIER_IMAGE_BUF_SIZE,
+			      gunzip);
+#endif
+}
+
+int bl2_plat_handle_pre_image_load(unsigned int image_id)
+{
+#ifdef UNIPHIER_DECOMPRESS_GZIP
+	image_decompress_prepare(uniphier_get_image_info(image_id));
+#endif
+	return 0;
+}
+
 int bl2_plat_handle_post_image_load(unsigned int image_id)
 {
+#ifdef UNIPHIER_DECOMPRESS_GZIP
+	struct image_info *image_info;
+	int ret;
+
+	image_info = uniphier_get_image_info(image_id);
+
+	if (!(image_info->h.attr & IMAGE_ATTRIB_SKIP_LOADING)) {
+		ret = image_decompress(uniphier_get_image_info(image_id));
+		if (ret)
+			return ret;
+	}
+#endif
+
 	if (image_id == SCP_BL2_IMAGE_ID && uniphier_bl2_kick_scp)
 		uniphier_scp_start();