1 /*
   2  * Copyright (c) 2008, 2013, Oracle and/or its affiliates. All rights reserved.
   3  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
   4  *
   5  * This code is free software; you can redistribute it and/or modify it
   6  * under the terms of the GNU General Public License version 2 only, as
   7  * published by the Free Software Foundation.
   8  *
   9  * This code is distributed in the hope that it will be useful, but WITHOUT
  10  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  11  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  12  * version 2 for more details (a copy is included in the LICENSE file that
  13  * accompanied this code).
  14  *
  15  * You should have received a copy of the GNU General Public License version
  16  * 2 along with this work; if not, write to the Free Software Foundation,
  17  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
  18  *
  19  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
  20  * or visit www.oracle.com if you need additional information or have any
  21  * questions.
  22  *
  23  */
  24 
  25 #ifndef OS_CPU_LINUX_ARM_VM_PREFETCH_LINUX_ARM_INLINE_HPP
  26 #define OS_CPU_LINUX_ARM_VM_PREFETCH_LINUX_ARM_INLINE_HPP
  27 
  28 #include "runtime/prefetch.hpp"
  29 
  30 inline void Prefetch::read (void *loc, intx interval) {
  31 #ifdef AARCH64
  32   __asm__ volatile ("prfm PLDL1KEEP, [%0]" : : "r" (loc));
  33 #else
  34 #if defined(__ARM_ARCH_7A__) || defined(__ARM_ARCH_6__) || defined(__ARM_ARCH_5TE__)
  35   __asm__ volatile ("pld [%0]" : : "r" (loc));
  36 #endif
  37 #endif // AARCH64
  38 }
  39 
  40 inline void Prefetch::write(void *loc, intx interval) {
  41 #ifdef AARCH64
  42   __asm__ volatile ("prfm PSTL1KEEP, [%0]" : : "r" (loc));
  43 #else
  44   // Not available on 32-bit ARM (prior to ARMv7 with MP extensions)
  45 #endif // AARCH64
  46 }
  47 
  48 #endif // OS_CPU_LINUX_ARM_VM_PREFETCH_LINUX_ARM_INLINE_HPP