1 /*
   2  * Copyright (c) 2008, 2015, 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_OS_LINUX_ARM_HPP
  26 #define OS_CPU_LINUX_ARM_VM_OS_LINUX_ARM_HPP
  27 
  28 #ifndef __thumb__
  29   enum {
  30     // Offset to add to frame::_fp when dealing with non-thumb C frames
  31 #ifdef AARCH64
  32     C_frame_offset =  0,
  33 #else
  34     C_frame_offset =  -1,
  35 #endif
  36   };
  37 #endif
  38 
  39   static void setup_fpu();
  40 
  41   static bool is_allocatable(size_t bytes);
  42 
  43   // Used to register dynamic code cache area with the OS
  44   // Note: Currently only used in 64 bit Windows implementations
  45   static bool register_code_area(char *low, char *high) { return true; }
  46 
  47 #ifndef AARCH64
  48   static jlong (*atomic_cmpxchg_long_func)(jlong compare_value,
  49                                            jlong exchange_value,
  50                                            volatile jlong *dest);
  51 
  52   static jlong (*atomic_load_long_func)(volatile jlong*);
  53 
  54   static void (*atomic_store_long_func)(jlong, volatile jlong*);
  55 
  56   static jint  (*atomic_add_func)(jint add_value, volatile jint *dest);
  57 
  58   static jint  (*atomic_xchg_func)(jint exchange_value, volatile jint *dest);
  59 
  60   static jint  (*atomic_cmpxchg_func)(jint compare_value,
  61                                       jint exchange_value,
  62                                       volatile jint *dest);
  63 
  64   static jlong atomic_cmpxchg_long_bootstrap(jlong, jlong, volatile jlong*);
  65 
  66   static jlong atomic_load_long_bootstrap(volatile jlong*);
  67 
  68   static void atomic_store_long_bootstrap(jlong, volatile jlong*);
  69 
  70   static jint  atomic_add_bootstrap(jint add_value, volatile jint *dest);
  71 
  72   static jint  atomic_xchg_bootstrap(jint exchange_value, volatile jint *dest);
  73 
  74   static jint  atomic_cmpxchg_bootstrap(jint compare_value,
  75                                         jint exchange_value,
  76                                         volatile jint *dest);
  77 #endif // !AARCH64
  78 
  79 #endif // OS_CPU_LINUX_ARM_VM_OS_LINUX_ARM_HPP