1 /*
 2  * Copyright (c) 2008, 2019, 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_OS_LINUX_ARM_HPP
26 #define OS_CPU_LINUX_ARM_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     C_frame_offset =  -1,
32   };
33 #endif
34 
35   static void setup_fpu();
36 
37   static bool is_allocatable(size_t bytes);
38 
39   // Used to register dynamic code cache area with the OS
40   // Note: Currently only used in 64 bit Windows implementations
41   static bool register_code_area(char *low, char *high) { return true; }
42 
43   static int64_t (*atomic_cmpxchg_long_func)(int64_t compare_value,
44                                              int64_t exchange_value,
45                                              volatile int64_t *dest);
46 
47   static int64_t (*atomic_load_long_func)(const volatile int64_t*);
48 
49   static void (*atomic_store_long_func)(int64_t, volatile int64_t*);
50 
51   static int32_t  (*atomic_add_func)(int32_t add_value, volatile int32_t *dest);
52 
53   static int32_t  (*atomic_xchg_func)(int32_t exchange_value, volatile int32_t *dest);
54 
55   static int32_t  (*atomic_cmpxchg_func)(int32_t compare_value,
56                                          int32_t exchange_value,
57                                          volatile int32_t *dest);
58 
59   static int64_t atomic_cmpxchg_long_bootstrap(int64_t, int64_t, volatile int64_t*);
60 
61   static int64_t atomic_load_long_bootstrap(const volatile int64_t*);
62 
63   static void atomic_store_long_bootstrap(int64_t, volatile int64_t*);
64 
65   static int32_t  atomic_add_bootstrap(int32_t add_value, volatile int32_t *dest);
66 
67   static int32_t  atomic_xchg_bootstrap(int32_t exchange_value, volatile int32_t *dest);
68 
69   static int32_t  atomic_cmpxchg_bootstrap(int32_t compare_value,
70                                            int32_t exchange_value,
71                                            volatile int32_t *dest);
72 
73 #endif // OS_CPU_LINUX_ARM_OS_LINUX_ARM_HPP