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