rom/devs/ata/bootwait.c

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