arch/all-darwin/hostdisk/geometry.c

   1 /*
   2     Copyright © 1995-2014, The AROS Development Team. All rights reserved.
   3     $Id$
   4 */
   5
   6 /* This routine differs in different UNIX variants (using different IOCTLs) */
   7
   8 #include <aros/debug.h>
   9 #include <devices/trackdisk.h>
  10 #include <exec/memory.h>
  11 #include <proto/hostlib.h>
  12
  13 #include <sys/disk.h>
  14
  15 #include "hostdisk_host.h"
  16 #include "hostdisk_device.h"
  17
  18 ULONG Host_DeviceGeometry(int file, struct DriveGeometry *dg, struct HostDiskBase *hdskBase)
  19 {
  20     int ret, err;
  21
  22     HostLib_Lock();
  23
  24     ret = hdskBase->iface->ioctl(file, DKIOCGETBLOCKSIZE, &dg->dg_SectorSize);
  25
  26     if (ret != -1)
  27         ret = hdskBase->iface->ioctl(file, DKIOCGETBLOCKCOUNT, &dg->dg_TotalSectors);
  28
  29     err = *hdskBase->errnoPtr;
  30
  31     HostLib_Unlock();
  32
  33     if (ret == -1)
  34     {
  35         D(bug("hostdisk: Error %d\n", err));
  36
  37         return err;
  38     }
  39
  40     D(bug("hostdisk: %u sectors per %u bytes\n", dg->dg_TotalSectors, dg->dg_SectorSize));
  41
  42     /*
  43      * This is all we can do on Darwin. They dropped CHS completely,
  44      * so we stay with LBA (CylSectors == 1)
  45      */
  46     dg->dg_Cylinders = dg->dg_TotalSectors;
  47
  48     return 0;
  49 }