Merge tag 'efi-2021-07-rc1-3' of https://source.denx.de/u-boot/custodians/u-boot-efi

[platform/kernel/u-boot.git] / lib / smbios-parser.c

diff --git a/lib/smbios-parser.c b/lib/smbios-parser.c
index b89f988..34203f9 100644 (file)
--- a/lib/smbios-parser.c
+++ b/lib/smbios-parser.c
@@ -3,6 +3,8 @@
  * Copyright (C) 2020, Bachmann electronic GmbH
  */
 
+#define LOG_CATEGORY   LOGC_BOOT
+
 #include <common.h>
 #include <smbios.h>
 
@@ -94,3 +96,39 @@ const char *smbios_string(const struct smbios_header *header, int index)
 
        return string_from_smbios_table(header, index);
 }
+
+int smbios_update_version_full(void *smbios_tab, const char *version)
+{
+       const struct smbios_header *hdr;
+       struct smbios_type0 *bios;
+       uint old_len, len;
+       char *ptr;
+
+       log_info("Updating SMBIOS table at %p\n", smbios_tab);
+       hdr = smbios_header(smbios_tab, SMBIOS_BIOS_INFORMATION);
+       if (!hdr)
+               return log_msg_ret("tab", -ENOENT);
+       bios = (struct smbios_type0 *)hdr;
+       ptr = (char *)smbios_string(hdr, bios->bios_ver);
+       if (!ptr)
+               return log_msg_ret("str", -ENOMEDIUM);
+
+       /*
+        * This string is supposed to have at least enough bytes and is
+        * padded with spaces. Update it, taking care not to move the
+        * \0 terminator, so that other strings in the string table
+        * are not disturbed. See smbios_add_string()
+        */
+       old_len = strnlen(ptr, SMBIOS_STR_MAX);
+       len = strnlen(version, SMBIOS_STR_MAX);
+       if (len > old_len)
+               return log_ret(-ENOSPC);
+
+       log_debug("Replacing SMBIOS type 0 version string '%s'\n", ptr);
+       memcpy(ptr, version, len);
+#ifdef LOG_DEBUG
+       print_buffer((ulong)ptr, ptr, 1, old_len + 1, 0);
+#endif
+
+       return 0;
+}