arch/m68k-all/exec/cacheclearu.c

   1 /*
   2     Copyright © 1995-2013, The AROS Development Team. All rights reserved.
   3     $Id$
   4
   5     Desc: CacheClearU - Simple way of clearing the caches.
   6     Lang: english
   7 */
   8
   9 #include <exec/types.h>
  10 #include <exec/execbase.h>
  11 #include <aros/libcall.h>
  12
  13 extern void AROS_SLIB_ENTRY(CacheClearU_00,Exec,106)(void);
  14 extern void AROS_SLIB_ENTRY(CacheClearU_20,Exec,106)(void);
  15 extern void AROS_SLIB_ENTRY(CacheClearU_40,Exec,106)(void);
  16 extern void AROS_SLIB_ENTRY(CacheClearU_60,Exec,106)(void);
  17
  18 #include <proto/exec.h>
  19
  20 /* See rom/exec/cacheclearu.c for documentation */
  21
  22 AROS_LH0(void, CacheClearU,
  23     struct ExecBase *, SysBase, 106, Exec)
  24 {
  25     AROS_LIBFUNC_INIT
  26     void (*func)(void);
  27
  28     if (SysBase->LibNode.lib_OpenCnt == 0)
  29         /* We were called from PrepareExecBase. AttnFlags isn't set yet.
  30          * Do nothing or we would always install 68000 routine.
  31          * No harm done, caches are disabled at this point.
  32          */
  33          return;
  34
  35     /* When called the first time, this patches up the
  36      * Exec syscall table to directly point to the right routine.
  37      * NOTE: We may have been originally called from SetFunction()
  38      * We must clear caches before calling SetFunction()
  39      */
  40
  41     Disable();
  42     if (SysBase->AttnFlags & AFF_68060) {
  43         /* 68060 support */
  44         func = AROS_SLIB_ENTRY(CacheClearU_60, Exec, 106);
  45     } else if (SysBase->AttnFlags & AFF_68040) {
  46         /* 68040 support */
  47         func = AROS_SLIB_ENTRY(CacheClearU_40, Exec, 106);
  48     } else if (SysBase->AttnFlags & AFF_68020) {
  49         /* 68020 support */
  50         func = AROS_SLIB_ENTRY(CacheClearU_20, Exec, 106);
  51     } else {
  52         /* Everybody else (68000, 68010) */
  53         func = AROS_SLIB_ENTRY(CacheClearU_00, Exec, 106);
  54     }
  55     func();
  56     SetFunction((struct Library *)SysBase, -LIB_VECTSIZE * 106, func);
  57     Enable();
  58
  59     AROS_LIBFUNC_EXIT
  60 } /* CacheClearU */