rom/devs/ata/bootwait.c

   1 /*
   2     Copyright © 1995-2013, The AROS Development Team. All rights reserved.
   3     $Id$
   4 */
   5
   6 #include <aros/asmcall.h>
   7 #include <aros/debug.h>
   8 #include <exec/resident.h>
   9 #include <libraries/expansionbase.h>
  10 #include <proto/exec.h>
  11
  12 #include LC_LIBDEFS_FILE
  13
  14 #include "ata.h"
  15
  16 extern const char ata_LibName[];
  17 extern const char ata_LibID[];
  18 extern const int ata_End;
  19
  20 AROS_UFP3(static APTR, ata_Wait,
  21           AROS_UFPA(void *, dummy, D0),
  22           AROS_UFPA(BPTR, segList, A0),
  23           AROS_UFPA(struct ExecBase *, SysBase, A6));
  24
  25 const struct Resident ata_BootWait =
  26 {
  27     RTC_MATCHWORD,
  28     (struct Resident *)&ata_BootWait,
  29     (void *)&ata_End,
  30     RTF_COLDSTART,
  31     VERSION_NUMBER,
  32     NT_TASK,
  33     -49, /* dosboot.resource is -50 */
  34     "ATA boot wait",
  35     &ata_LibID[6],
  36     &ata_Wait,
  37 };
  38
  39 /*
  40  * The purpose of this delay is to wait until device detection is done
  41  * before boot sequence enters DOS bootstrap. Without this we reach the
  42  * bootstrap earlier than devices are detected (and BootNodes inserted).
  43  * As a result, we end up in unbootable system.
  44  * Actually, i dislike this solution a bit. I think something else has
  45  * to be implemented. However i do not know what. Even if we rewrite
  46  * adding BootNodes, bootmenu still has to wait until all nodes are added.
  47  * Making device detection synchronous is IMHO not a good option, it will
  48  * increase booting time of our OS.
  49  */
  50
  51 AROS_UFH3(static APTR, ata_Wait,
  52           AROS_UFPA(void *, dummy, D0),
  53           AROS_UFPA(BPTR, segList, A0),
  54           AROS_UFPA(struct ExecBase *, SysBase, A6))
  55 {
  56     AROS_USERFUNC_INIT
  57
  58     struct ataBase *ATABase;
  59
  60     /* We do not want to deal with IORequest and units, so just FindName() */
  61     ATABase = (struct ataBase *)FindName(&SysBase->DeviceList, ata_LibName);
  62     if (ATABase)
  63     {
  64         D(bug("[ATA  ] Waiting for device detection to complete...\n"));
  65         ObtainSemaphore(&ATABase->DetectionSem);
  66         ReleaseSemaphore(&ATABase->DetectionSem);
  67     }
  68
  69     return NULL;
  70
  71     AROS_USERFUNC_EXIT
  72 }