[PATCH] imd: add optional endianness= parameter for bi-endian systems

[Antony Pavlov]

MIPS architecture supports both little- and big-endian modes.
It's handy to have means to determine endianness of barebox
image. This patch adds necessary record into imd block.

Signed-off-by: Antony Pavlov <antonynpavlov at gmail.com>
---
 common/Kconfig       |  6 ++++++
 common/imd-barebox.c | 10 ++++++++++
 2 files changed, 16 insertions(+)

diff --git a/common/Kconfig b/common/Kconfig
index 667b0a1e79..f8d99bd48c 100644
--- a/common/Kconfig
+++ b/common/Kconfig
@@ -730,6 +730,12 @@ config IMD
 	select CRC32
 	bool "barebox metadata support"
 
+config IMD_ENDIANNESS
+	bool "add endianness record to metadata"
+	depends on IMD
+	depends on SYS_SUPPORTS_LITTLE_ENDIAN && SYS_SUPPORTS_BIG_ENDIAN
+	default y
+
 choice
 	prompt "console support"
 	default CONSOLE_FULL
diff --git a/common/imd-barebox.c b/common/imd-barebox.c
index e11fdca845..7877c8de39 100644
--- a/common/imd-barebox.c
+++ b/common/imd-barebox.c
@@ -23,6 +23,16 @@ __BAREBOX_IMD_SECTION(.barebox_imd_end) = {
 	.type = cpu_to_le32(IMD_TYPE_END),
 };
 
+#ifdef CONFIG_IMD_ENDIANNESS
+#ifdef CONFIG_CPU_LITTLE_ENDIAN
+#define IMD_ENDIANNESS "little"
+#else
+#define IMD_ENDIANNESS "big"
+#endif
+BAREBOX_IMD_TAG_STRING(imd_endianness_tag, IMD_TYPE_PARAMETER,
+			"endianness=" IMD_ENDIANNESS, 1);
+#endif /* CONFIG_IMD_ENDIANNESS */
+
 BAREBOX_IMD_TAG_STRING(imd_build_tag, IMD_TYPE_BUILD, UTS_VERSION, 1);
 BAREBOX_IMD_TAG_STRING(imd_release_tag, IMD_TYPE_RELEASE, UTS_RELEASE, 1);
 BAREBOX_IMD_TAG_STRING(imd_buildsystem_version_tag, IMD_TYPE_BUILDSYSTEM, BUILDSYSTEM_VERSION, 1);
-- 
2.33.0