rom/efi/findconfigtable.c

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