arch/all-pc/acpi/scansdt.c

   1 #include <resources/acpi.h>
   2 #include <utility/hooks.h>
   3
   4 /*****************************************************************************
   5
   6     NAME */
   7 #include <proto/acpi.h>
   8
   9         AROS_LH3(ULONG, ACPI_ScanSDT,
  10
  11 /*  SYNOPSIS */
  12         AROS_LHA(ULONG, id, D0),
  13         AROS_LHA(const struct Hook *, hook, A0),
  14         AROS_LHA(APTR, userdata, A1),
  15
  16 /*  LOCATION */
  17         struct ACPIBase *, ACPIBase, 5, Acpi)
  18
  19 /*  FUNCTION
  20         Scan multiple system description tables with the given signature.
  21
  22     INPUTS
  23         id       - a signature of the table(s) to scan. Supply ACPI_ID_ALL
  24                    to enumerate all tables.
  25         hook     - a hook to call. The hook will be called with 'object'
  26                    argument set to table pointer, and 'paramPacket' set to
  27                    'userdata' argument. You can pass a NULL here in order just
  28                    to count the number of tables.
  29         userdata - a user-supplied data to pass to the hook.
  30
  31     RESULT
  32         Total number of processed tables. The table is considered processed if
  33         either supplied hook returns nonzero value, or there's no hook supplied.
  34
  35     NOTES
  36         Root tables, containing no data but only pointers to other tables
  37         (like RSDT and XSDT) are not included in the scan.
  38
  39     EXAMPLE
  40
  41     BUGS
  42
  43     SEE ALSO
  44         ACPI_FindSDT()
  45
  46     INTERNALS
  47
  48 ******************************************************************************/
  49 {
  50     AROS_LIBFUNC_INIT
  51
  52     ULONG count = 0;
  53     struct ACPI_TABLE_DEF_HEADER *header;
  54     ULONG i;
  55
  56     for (i = 0; i < ACPIBase->ACPIB_SDT_Count; i++)
  57     {
  58         header = ACPIBase->ACPIB_SDT_Entry[i];
  59
  60         if ((id == ACPI_ID_ALL) || (id == header->signature))
  61         {
  62             if (hook)
  63             {
  64                 BOOL res = CALLHOOKPKT((struct Hook *)hook, header, userdata);
  65
  66                 if (res)
  67                     count++;
  68             }
  69             else
  70                 count++;
  71         }
  72     }
  73
  74     return count;
  75
  76     AROS_LIBFUNC_EXIT
  77 }