target/linux/coldfire/files-2.6.31/arch/m68k/coldfire/common/cache.c

   1 /*
   2  *  linux/arch/m68k/coldfire/cache.c
   3  *
   4  *  Copyright 2007-2009 Freescale Semiconductor, Inc. All Rights Reserved.
   5  *  Matt Waddel Matt.Waddel@freescale.com
   6  *  Kurt Mahan kmahan@freescale.com
   7  *  Jason Jin Jason.Jin@freescale.com
   8  *  Shrek Wu B16972@freescale.com
   9  *
  10  *  This program is free software; you can redistribute it and/or modify
  11  *  it under the terms of the GNU General Public License as published by
  12  *  the Free Software Foundation; either version 2 of the License, or
  13  *  (at your option) any later version.
  14  */
  15
  16 #include <linux/interrupt.h>
  17 #include <asm/cfcache.h>
  18 #include <asm/coldfire.h>
  19 #include <asm/system.h>
  20
  21 /* Cache Control Reg shadow reg */
  22 unsigned long shadow_cacr;
  23
  24 /**
  25  * cacr_set - Set the Cache Control Register
  26  * @x Value to set
  27  */
  28 void cacr_set(unsigned long x)
  29 {
  30         shadow_cacr = x;
  31
  32         __asm__ __volatile__ ("movec %0, %%cacr"
  33                               : /* no outputs */
  34                               : "r" (shadow_cacr));
  35 }
  36
  37 /**
  38  * cacr_get - Get the current value of the Cache Control Register
  39  *
  40  * @return CACR value
  41  */
  42 unsigned long cacr_get(void)
  43 {
  44         return shadow_cacr;
  45 }