Implement skiboot versioning

We grab a version from git tags (or SKIBOOT_VERSION environment variable),
optionally tack on EXTRA_VERSION (if from git) as well as add things to the
git version number if we're ahead of the most recent tag or the tree is dirty.

Also fix-up makefiles so that we don't have to rebuild version.c every time
you run make.

fsp attn area needed updating as we can have >40 character version strings.

We also export the version string via device tree rather than just the gitid.

For buildroot builds, setting SKIBOOT_VERSION environment variable to the
tag you grab will do the correct thing.

Signed-off-by: Stewart Smith <stewart@linux.vnet.ibm.com>

1 files changed, 3 insertions, 3 deletions

diff --git a/include/fsp-attn.h b/include/fsp-attn.h
index 947c49f..1eaa5bb 100644
--- a/include/fsp-attn.h
+++ b/include/fsp-attn.h
@@ -59,14 +59,14 @@ struct sp_attn_area {
 #define TI_MSG_LEN	940
 
 /* Maximum sapphire version length (approx) */
-#define GITID_LEN	40
+#define VERSION_LEN	80
 /* Upto 10 frames each of length 40 bytes + header = 430 bytes */
 #define BT_FRAME_LEN 430
 /* File info length : Use the rest of the memory for file details */
-#define FILE_INFO_LEN	(TI_MSG_LEN - GITID_LEN - BT_FRAME_LEN)
+#define FILE_INFO_LEN	(TI_MSG_LEN - VERSION_LEN - BT_FRAME_LEN)
 
 struct user_data {
-	char		gitid[GITID_LEN];
+	char		version[VERSION_LEN];
 	char		bt_buf[BT_FRAME_LEN];
 	char		file_info[FILE_INFO_LEN];
 } __packed;