[PATCH 2/2] mkimage: allow internalization of data-position

[Lars Feyaerts]

Make it possible for data that was externalized using a static external
position (-p) to be internalized. Enables the ability to convert
existing FIT images built with -p to be converted to a FIT image where the
data is internal, to be converted to a FIT image where the data is
external relative to the end of the FIT (-E) or change the initial
static external position to a different static external position (-p).

Removing the original external-data-related properties ensures that
they're not present after conversion. Without this, they would still be
present in the resulting FIT even if the FIT has been, for example,
internalized.

Signed-off-by: Lars Feyaerts <lars at bitbiz.be>
---

 doc/mkimage.1     | 19 +++++++++++++++++++
 tools/fit_image.c | 26 +++++++++++++++++++++-----
 2 files changed, 40 insertions(+), 5 deletions(-)

diff --git a/doc/mkimage.1 b/doc/mkimage.1
index 76c7859bb03..d0a038a880a 100644
--- a/doc/mkimage.1
+++ b/doc/mkimage.1
@@ -860,6 +860,25 @@ verify signatures is added to u\-boot.dtb with required = "conf" property.
 	\-K u\-boot.dtb -r kernel.itb
 .EE
 .RE
+.P
+Convert an existing FIT image from any of the three types of data storage
+(internal, external data-offset or external data-position) to another type
+of data storage.
+.RS
+.P
+.EX
+\fB// convert FIT from internal data to data-position
+\fBmkimage -p 0x20000 -F internal_data.itb
+.EE
+.EX
+\fB// convert FIT from data-position to data-offset
+\fBmkimage -E -F external_data-position.itb
+.EE
+.EX
+\fB// convert FIT from data-offset to internal data
+\fBmkimage -F external_data-offset.itb
+.EE
+.RE
 .
 .SH SEE ALSO
 .BR dtc (1),
diff --git a/tools/fit_image.c b/tools/fit_image.c
index 9fe69ea0d9f..10f36e93422 100644
--- a/tools/fit_image.c
+++ b/tools/fit_image.c
@@ -616,6 +616,8 @@ err:
 static int fit_import_data(struct image_tool_params *params, const char *fname)
 {
 	void *fdt, *old_fdt;
+	void *data = NULL;
+	const char *ext_data_prop = NULL;
 	int fit_size, new_size, size, data_base;
 	int fd;
 	struct stat sbuf;
@@ -659,14 +661,28 @@ static int fit_import_data(struct image_tool_params *params, const char *fname)
 		int buf_ptr;
 		int len;
 
-		buf_ptr = fdtdec_get_int(fdt, node, "data-offset", -1);
-		len = fdtdec_get_int(fdt, node, "data-size", -1);
-		if (buf_ptr == -1 || len == -1)
+		/*
+		 * FIT_DATA_OFFSET_PROP and FIT_DATA_POSITION_PROP are never both present,
+		 *  but if they are, prefer FIT_DATA_OFFSET_PROP as it was there first
+		 */
+		buf_ptr = fdtdec_get_int(fdt, node, FIT_DATA_POSITION_PROP, -1);
+		if (buf_ptr != -1) {
+			ext_data_prop = FIT_DATA_POSITION_PROP;
+			data = old_fdt + buf_ptr;
+		}
+		buf_ptr = fdtdec_get_int(fdt, node, FIT_DATA_OFFSET_PROP, -1);
+		if (buf_ptr != -1) {
+			ext_data_prop = FIT_DATA_OFFSET_PROP;
+			data = old_fdt + data_base + buf_ptr;
+		}
+		len = fdtdec_get_int(fdt, node, FIT_DATA_SIZE_PROP, -1);
+		if (!data || len == -1)
 			continue;
 		debug("Importing data size %x\n", len);
 
-		ret = fdt_setprop(fdt, node, "data",
-				  old_fdt + data_base + buf_ptr, len);
+		ret = fdt_setprop(fdt, node, FIT_DATA_PROP, data, len);
+		ret = fdt_delprop(fdt, node, ext_data_prop);
+
 		if (ret) {
 			debug("%s: Failed to write property: %s\n", __func__,
 			      fdt_strerror(ret));
-- 
2.34.1