smbios: Allow writing to the coreboot version string
When U-Boot is booted from coreboot the SMBIOS tables are written by
coreboot, not U-Boot. The existing method of updating the BIOS version
string does not work in that case, since gd->smbios_version is only set
when U-Boot writes the tables.
Add a new function which allows the version to be updated by parsing the
tables and writing the string in the correct place. Since coreboot
provides a pointer to the SMBIOS tables in its sysinfo structure, this
makes it easy to do the update.
Signed-off-by: Simon Glass <sjg@chromium.org>
diff --git a/include/smbios.h b/include/smbios.h
index ecc4fd1..ffeefb4 100644
--- a/include/smbios.h
+++ b/include/smbios.h
@@ -14,6 +14,10 @@
#define SMBIOS_MAJOR_VER 3
#define SMBIOS_MINOR_VER 0
+enum {
+ SMBIOS_STR_MAX = 64, /* Maximum length allowed for a string */
+};
+
/* SMBIOS structure types */
enum {
SMBIOS_BIOS_INFORMATION = 0,
@@ -269,4 +273,20 @@
*/
int smbios_update_version(const char *version);
+/**
+ * smbios_update_version_full() - Update the version string
+ *
+ * This can be called after the SMBIOS tables are written (e.g. after the U-Boot
+ * main loop has started) to update the BIOS version string (SMBIOS table 0).
+ * It scans for the correct place to put the version, so does not need U-Boot
+ * to have actually written the tables itself (e.g. if a previous bootloader
+ * did it).
+ *
+ * @smbios_tab: Start of SMBIOS tables
+ * @version: New version string to use
+ * @return 0 if OK, -ENOENT if no version string was previously written,
+ * -ENOSPC if the new string is too large to fit
+ */
+int smbios_update_version_full(void *smbios_tab, const char *version);
+
#endif /* _SMBIOS_H_ */