arch/ppc-all/exec/cachecleare.c

   1 /*
   2     Copyright © 1995-2013, The AROS Development Team. All rights reserved.
   3     $Id$
   4
   5     Desc: CacheClearE() - Clear the caches with extended control.
   6     Lang: english
   7 */
   8
   9 #include <aros/config.h>
  10 #include <exec/types.h>
  11 #include <exec/execbase.h>
  12 #include <aros/libcall.h>
  13
  14 #include "kernel_syscall.h"
  15
  16 #include <proto/exec.h>
  17
  18 /* See rom/exec/cachecleare.c for documentation */
  19
  20 AROS_LH3(void, CacheClearE,
  21     AROS_LHA(APTR, address, A0),
  22     AROS_LHA(ULONG, length, D0),
  23     AROS_LHA(ULONG, caches, D1),
  24     struct ExecBase *, SysBase, 107, Exec)
  25 {
  26     AROS_LIBFUNC_INIT
  27
  28     char *start = (char*)((IPTR)address & 0xffffffe0);
  29     char *end = (char*)(((IPTR)address + length + 31) & 0xffffffe0);
  30     char *ptr;
  31
  32     /* Flush data caches and mark cache lines invalid */
  33     if (caches & CACRF_ClearD)
  34     {
  35         for (ptr = start; ptr < end; ptr +=32)
  36         {
  37             asm volatile("dcbf 0,%0"::"r"(ptr));
  38         }
  39         asm volatile("sync");
  40     }
  41
  42 #if (AROS_FLAVOUR & AROS_FLAVOUR_STANDALONE)
  43     if (caches & CACRF_InvalidateD)
  44     {
  45         register APTR addr asm ("r4") = address;
  46         register ULONG len asm ("r5") = length;
  47         asm volatile("li %%r3,%0; sc"::"i"(SC_INVALIDATED),"r"(addr),"r"(len):"memory","r3");
  48     }
  49 #endif
  50
  51     if (caches & CACRF_ClearI) /* Clear ICache with DCache together */
  52     {
  53         for (ptr = start; ptr < end; ptr +=32)
  54         {
  55             asm volatile("icbi 0,%0"::"r"(ptr));
  56         }
  57
  58         asm volatile("sync; isync; ");
  59     }
  60
  61     AROS_LIBFUNC_EXIT
  62 } /* CacheClearE */