[PATCH v2 2/4] image-metadata: add flags field to imd_header

[Steffen Trumtrar <s.trumtrar@pengutronix.de>]

To allow marking an imd tag with properties, add a flags field to the imd_header.

Signed-off-by: Steffen Trumtrar <s.trumtrar@pengutronix.de>
---
 include/image-metadata.h | 13 +++++++++++++
 1 file changed, 13 insertions(+)

diff --git a/include/image-metadata.h b/include/image-metadata.h
index 5904d95acd37..ca73e6cf6ec6 100644
--- a/include/image-metadata.h
+++ b/include/image-metadata.h
@@ -28,6 +28,8 @@
 #define IMD_TYPE_END		0x640c7fff
 #define IMD_TYPE_INVALID	0xffffffff
 
+#define IMD_FLAG_TAG_VALID	(1 << 0)
+
 /*
  * The IMD header. All data is stored in little endian format in the image.
  * The next header starts at the next 4 byte boundary after the data.
@@ -35,6 +37,7 @@
 struct imd_header {
 	uint32_t type;		/* One of IMD_TYPE_* above */
 	uint32_t datalength;	/* Length of the data (exluding the header) */
+	uint32_t flags;
 };
 
 /*
@@ -51,6 +54,11 @@ static inline int imd_is_string(uint32_t type)
 	return (type & 0x8000) ? 1 : 0;
 }
 
+static inline int imd_tag_is_valid(uint32_t flags)
+{
+	return (flags & IMD_FLAG_TAG_VALID) ? 1 : 0;
+}
+
 static inline int imd_type_valid(uint32_t type)
 {
 	return (type & 0xffff0000) == 0x640c0000;
@@ -78,6 +86,11 @@ static inline uint32_t imd_read_length(const struct imd_header *imd)
 	return imd_read_le32(&imd->datalength);
 }
 
+static inline uint32_t imd_read_flags(const struct imd_header *imd)
+{
+	return imd_read_le32(&imd->flags);
+}
+
 const struct imd_header *imd_find_type(const struct imd_header *imd,
 				       uint32_t type);
 
-- 
2.24.0


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