cache.h

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/*
 * (c) 2007-2009 Author(s)
 *     economic rights: Technische Universität Dresden (Germany)
 *
 * This file is part of TUD:OS and distributed under the terms of the
 * GNU General Public License 2.
 * Please see the COPYING-GPL-2 file for details.
 *
 * As a special exception, you may use this file as part of a free software
 * library without restriction.  Specifically, if other files instantiate
 * templates or use macros or inline functions from this file, or you compile
 * this file and link it with other files to produce an executable, this
 * file does not by itself cause the resulting executable to be covered by
 * the GNU General Public License.  This exception does not however
 * invalidate any other reasons why the executable file might be covered by
 * the GNU General Public License.
 */
#ifndef __L4SYS__INCLUDE__ARCH_ARM__CACHE_H__
#define __L4SYS__INCLUDE__ARCH_ARM__CACHE_H__
 
#include <l4/sys/compiler.h>
#include <l4/sys/syscall_defs.h>
 
#include_next <l4/sys/cache.h>
 
L4_INLINE void
l4_cache_op_arm_call(unsigned long op,
                     unsigned long start,
                     unsigned long end);
 
L4_INLINE void
l4_cache_op_arm_call(unsigned long op,
                     unsigned long start,
                     unsigned long end)
{
  register unsigned long _op    __asm__ ("r0") = op;
  register unsigned long _start __asm__ ("r1") = start;
  register unsigned long _end   __asm__ ("r2") = end;
 
  __asm__ __volatile__
    ("@ l4_cache_op_arm_call(start) \n\t"
     "mov     lr, pc              \n\t"
     "mvn     pc, %[sc]             \n\t"
     "@ l4_cache_op_arm_call(end)   \n\t"
       :
  "=r" (_op),
  "=r" (_start),
  "=r" (_end)
       :
       [sc] "i" (~(L4_SYSCALL_MEM_OP)),
  "0" (_op),
  "1" (_start),
  "2" (_end)
       :
  "cc", "memory", "lr"
       );
}
 
enum L4_mem_cache_ops
{
  L4_MEM_CACHE_OP_CLEAN_DATA        = 0,
  L4_MEM_CACHE_OP_FLUSH_DATA        = 1,
  L4_MEM_CACHE_OP_INV_DATA          = 2,
  L4_MEM_CACHE_OP_COHERENT          = 3,
  L4_MEM_CACHE_OP_DMA_COHERENT      = 4,
  L4_MEM_CACHE_OP_DMA_COHERENT_FULL = 5,
};
 
L4_INLINE int
l4_cache_clean_data(unsigned long start,
                    unsigned long end) L4_NOTHROW
{
  l4_cache_op_arm_call(L4_MEM_CACHE_OP_CLEAN_DATA, start, end);
  return 0;
}
 
L4_INLINE int
l4_cache_flush_data(unsigned long start,
                    unsigned long end) L4_NOTHROW
{
  l4_cache_op_arm_call(L4_MEM_CACHE_OP_FLUSH_DATA, start, end);
  return 0;
}
 
L4_INLINE int
l4_cache_inv_data(unsigned long start,
                  unsigned long end) L4_NOTHROW
{
  l4_cache_op_arm_call(L4_MEM_CACHE_OP_INV_DATA, start, end);
  return 0;
}
 
L4_INLINE int
l4_cache_coherent(unsigned long start,
                  unsigned long end) L4_NOTHROW
{
  l4_cache_op_arm_call(L4_MEM_CACHE_OP_COHERENT, start, end);
  return 0;
}
 
L4_INLINE int
l4_cache_dma_coherent(unsigned long start,
                      unsigned long end) L4_NOTHROW
{
  l4_cache_op_arm_call(L4_MEM_CACHE_OP_DMA_COHERENT, start, end);
  return 0;
}
 
L4_INLINE int
l4_cache_dma_coherent_full(void) L4_NOTHROW
{
  l4_cache_op_arm_call(L4_MEM_CACHE_OP_DMA_COHERENT_FULL, 0, 0);
  return 0;
}
 
#endif /* ! __L4SYS__INCLUDE__ARCH_ARM__CACHE_H__ */