1 files changed, 126 insertions, 0 deletions
diff --git a/gnu-efi/gnu-efi-3.0/lib/smbios.c b/gnu-efi/gnu-efi-3.0/lib/smbios.c
new file mode 100644
index 0000000..5986f5a
--- /dev/null
+++ b/gnu-efi/gnu-efi-3.0/lib/smbios.c
@@ -0,0 +1,126 @@
+/*++
+
+Copyright (c) 2000  Intel Corporation
+
+Module Name:
+
+    Smbios.c
+    
+Abstract:
+
+    Lib fucntions for SMBIOS. Used to get system serial number and GUID
+
+Revision History
+
+--*/
+
+#include "lib.h"
+
+
+EFI_STATUS
+LibGetSmbiosSystemGuidAndSerialNumber (
+    IN  EFI_GUID    *SystemGuid,
+    OUT CHAR8       **SystemSerialNumber
+    )
+{
+    EFI_STATUS                  Status;
+    SMBIOS_STRUCTURE_TABLE      *SmbiosTable;
+    SMBIOS_STRUCTURE_POINTER    Smbios;  
+    SMBIOS_STRUCTURE_POINTER    SmbiosEnd;  
+    UINT16                      Index;
+    
+    Status = LibGetSystemConfigurationTable(&SMBIOSTableGuid, (VOID**)&SmbiosTable);
+    if (EFI_ERROR(Status)) {
+        return EFI_NOT_FOUND;
+    }
+
+    Smbios.Hdr = (SMBIOS_HEADER *)SmbiosTable->TableAddress;
+    SmbiosEnd.Raw = (UINT8 *)(SmbiosTable->TableAddress + SmbiosTable->TableLength);
+    for (Index = 0; Index < SmbiosTable->TableLength ; Index++) {
+        if (Smbios.Hdr->Type == 1) {
+            if (Smbios.Hdr->Length < 0x19) {
+                //
+                // Older version did not support Guid and Serial number
+                //
+                continue;
+            }
+
+            //
+            // SMBIOS tables are byte packed so we need to do a byte copy to
+            //  prevend alignment faults on IA-64.
+            
+            CopyMem (SystemGuid, &Smbios.Type1->Uuid, sizeof(EFI_GUID));
+            *SystemSerialNumber = LibGetSmbiosString(&Smbios, Smbios.Type1->SerialNumber);
+            return EFI_SUCCESS;
+        }
+
+        //
+        // Make Smbios point to the next record
+        //
+        LibGetSmbiosString (&Smbios, -1);
+
+        if (Smbios.Raw >= SmbiosEnd.Raw) {
+            //
+            // SMBIOS 2.1 incorrectly stated the length of SmbiosTable as 0x1e. 
+            //  given this we must double check against the lenght of
+            /// the structure. My home PC has this bug.ruthard
+            //
+            return EFI_SUCCESS;
+        }
+    }
+
+    return EFI_SUCCESS;
+}
+
+CHAR8*
+LibGetSmbiosString (
+    IN  SMBIOS_STRUCTURE_POINTER    *Smbios,
+    IN  UINT16                      StringNumber
+    )
+/*++
+
+    Return SMBIOS string given the string number.
+
+    Arguments:
+        Smbios - Pointer to SMBIOS structure
+        StringNumber - String number to return. -1 is used to skip all strings and 
+            point to the next SMBIOS structure.
+
+    Returns:
+        Pointer to string, or pointer to next SMBIOS strcuture if StringNumber == -1
+--*/
+{
+    UINT16  Index;
+    CHAR8   *String;
+
+    //
+    // Skip over formatted section
+    //
+    String = (CHAR8 *)(Smbios->Raw + Smbios->Hdr->Length);
+
+    //
+    // Look through unformated section
+    //
+    for (Index = 1; Index <= StringNumber; Index++) {
+        if (StringNumber == Index) {
+            return String;
+        }
+
+        //
+        // Skip string
+        //
+        for (; *String != 0; String++);
+        String++;
+
+        if (*String == 0) {
+            //
+            // If double NULL then we are done.
+            //  Retrun pointer to next structure in Smbios.
+            //  if you pass in a -1 you will always get here
+            //
+            Smbios->Raw = (UINT8 *)++String;
+            return NULL;        
+        }
+    }
+    return NULL;        
+}