rom/efi/findconfigtable.c

   1 /*
   2     Copyright © 1995-2014, The AROS Development Team. All rights reserved.
   3     $Id$
   4 */
   5
   6 #include <aros/debug.h>
   7 #include <libraries/uuid.h>
   8
   9 #include <string.h>
  10
  11 #ifdef DEBUG_UUID
  12
  13 static void PRINT_UUID(uuid_t *id)
  14 {
  15     unsigned int i;
  16
  17     bug("[EFI] Table UUID: 0x%08X-%04X-%04X-%02X%02X-",
  18         id->time_low, id->time_mid, id->time_hi_and_version,
  19         id->clock_seq_hi_and_reserved, id->clock_seq_low);
  20
  21     for (i = 0; i < sizeof(id->node); i++)
  22         bug("%02X", id->node[i]);
  23
  24     RawPutChar('\n');
  25 }
  26
  27 #else
  28 #define PRINT_UUID(id)
  29 #endif
  30
  31 /*****************************************************************************
  32
  33     NAME */
  34 #include <proto/efi.h>
  35
  36         AROS_LH1(void *, EFI_FindConfigTable,
  37
  38 /*  SYNOPSIS */
  39         AROS_LHA(const uuid_t *, Guid, A0),
  40
  41 /*  LOCATION */
  42         struct EFIBase *, EFIBase, 1, Efi)
  43
  44 /*  FUNCTION
  45         Locate a configuration table by GUID
  46
  47     INPUTS
  48         Guid - a pointer to a GUID structure
  49
  50     RESULT
  51         A pointer to a table or NULL if nothing found.
  52
  53     NOTES
  54
  55     EXAMPLE
  56
  57     BUGS
  58
  59     SEE ALSO
  60
  61     INTERNALS
  62
  63 ******************************************************************************/
  64 {
  65     AROS_LIBFUNC_INIT
  66
  67     struct EFI_Config *conf = EFIBase->System->ConfigTable;
  68     IPTR i;
  69
  70     /* Safety */
  71     if (!conf)
  72         return NULL;
  73
  74     for (i = 0; i < EFIBase->System->NumEntries; i++)
  75     {
  76         PRINT_UUID(&conf[i].VendorGUID);
  77
  78         if (!memcmp(&conf[i].VendorGUID, Guid, sizeof(uuid_t)))
  79         {
  80             return conf[i].Table;
  81         }
  82     }
  83
  84     return NULL;
  85
  86     AROS_LIBFUNC_EXIT
  87 }