arch/all-pc/kernel/alloccpumask.c

   1 /*
   2     Copyright © 2017, The AROS Development Team. All rights reserved.
   3     $Id$
   4
   5     Desc:
   6 */
   7
   8 #include <proto/exec.h>
   9
  10 #include <aros/kernel.h>
  11 #include <aros/libcall.h>
  12
  13 #include "kernel_base.h"
  14 #include "kernel_intern.h"
  15
  16 AROS_LH0(void *, KrnAllocCPUMask,
  17         struct KernelBase *, KernelBase, 42, Kernel)
  18 {
  19     AROS_LIBFUNC_INIT
  20
  21     void *mask = NULL;
  22     struct PlatformData *pdata = KernelBase->kb_PlatformData;
  23     struct APICData *apicData;
  24     int count;
  25
  26     if ((pdata) && (pdata->kb_APIC))
  27     {
  28         apicData  = pdata->kb_APIC;
  29
  30         count = apicData->apic_count / 32;
  31
  32         if ((count * 32) < apicData->apic_count)
  33             count += 1;
  34
  35         mask = AllocMem(count * sizeof(ULONG), MEMF_CLEAR | MEMF_PUBLIC);
  36     }
  37
  38     return mask;
  39
  40     AROS_LIBFUNC_EXIT
  41 }