arch/arm-all/dos/probecpu.c

   1 /*
   2     Copyright © 2011, The AROS Development Team. All rights reserved.
   3     $Id$
   4
   5     Desc: Obtain ARM CPU information for ELF loader
   6     Lang: english
   7 */
   8
   9 #include <aros/debug.h>
  10 #include <aros/symbolsets.h>
  11 #include <resources/processor.h>
  12 #include <proto/processor.h>
  13
  14 #include "dos_intern.h"
  15
  16 static ULONG ProbeCPU(struct IntDosBase *base)
  17 {
  18     APTR ProcessorBase = OpenResource("processor.resource");
  19
  20     if (!ProcessorBase)
  21     {
  22         D(bug("[DOS] No processor.resource! Won't boot!\n"));
  23         return FALSE;
  24     }
  25
  26     /*
  27      * Durty hack allowing to boot up a BSP without working processor.resource implementation.
  28      * It allows you to run any binaries. But be careful! It's strongly recommended to implement
  29      * processor.resource for all ARM ports.
  30      * The hack is based on the fact that not implemented processor.resource tags will leave their
  31      * data untouched.
  32      */
  33     base->arm_Arch   = CPUFAMILY_ARM_7;
  34     base->arm_VFP    = TRUE;
  35     base->arm_VFP_v3 = TRUE;
  36
  37     GetCPUInfoTags(GCIT_Family       , &base->arm_Arch,
  38                    GCIT_SupportsVFP  , &base->arm_VFP,
  39                    GCIT_SupportsVFPv3, &base->arm_VFP_v3,
  40                    TAG_DONE);
  41
  42     D(bug("[DOS] CPU architecture: %d, VFP support: %d, VFPv3 support: %d\n", base->arm_Arch, base->arm_VFP, base->arm_VFP_v3));
  43
  44     return TRUE;
  45 }
  46
  47 ADD2INITLIB(ProbeCPU, 0);