libgloss/bfin/clear_cache_range.c

   1 /*
   2  * C library support files for the Blackfin processor
   3  *
   4  * Copyright (C) 2010 Analog Devices, Inc.
   5  *
   6  * The authors hereby grant permission to use, copy, modify, distribute,
   7  * and license this software and its documentation for any purpose, provided
   8  * that existing copyright notices are retained in all copies and that this
   9  * notice is included verbatim in any distributions. No written agreement,
  10  * license, or royalty fee is required for any of the authorized uses.
  11  * Modifications to this software may be copyrighted by their authors
  12  * and need not follow the licensing terms described here, provided that
  13  * the new terms are clearly indicated on the first page of each file where
  14  * they apply.
  15  */
  16
  17 /* This is a callback which gcc itself wants to flush jump tables.
  18
  19    Map it into L1 Text because of anomalies 05-00-0312 and 05-00-0419.  */
  20
  21 __attribute__ ((l1_text))
  22 void __clear_cache_range (char *beg, char *end)
  23 {
  24   char *ptr = beg;
  25   do {
  26     __asm__ __volatile__ ("FLUSH [%0++];" : "+a" (ptr) : : "memory");
  27   } while (ptr <= end);
  28   ptr = beg;
  29   __asm__ __volatile__ ("SSYNC;");
  30   do {
  31     __asm__ __volatile__ ("IFLUSH [%0++];" : "+a" (ptr) : : "memory");
  32   } while (ptr <= end);
  33 }