1 /* 2 * Copyright (c) 2008, 2017, 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 int64_t (*atomic_cmpxchg_long_func)(int64_t compare_value, 49 int64_t exchange_value, 50 volatile int64_t *dest); 51 52 static int64_t (*atomic_load_long_func)(const volatile int64_t*); 53 54 static void (*atomic_store_long_func)(int64_t, volatile int64_t*); 55 56 static int32_t (*atomic_add_func)(int32_t add_value, volatile int32_t *dest); 57 58 static int32_t (*atomic_xchg_func)(int32_t exchange_value, volatile int32_t *dest); 59 60 static int32_t (*atomic_cmpxchg_func)(int32_t compare_value, 61 int32_t exchange_value, 62 volatile int32_t *dest); 63 64 static int64_t atomic_cmpxchg_long_bootstrap(int64_t, int64_t, volatile int64_t*); 65 66 static int64_t atomic_load_long_bootstrap(const volatile int64_t*); 67 68 static void atomic_store_long_bootstrap(int64_t, volatile int64_t*); 69 70 static int32_t atomic_add_bootstrap(int32_t add_value, volatile int32_t *dest); 71 72 static int32_t atomic_xchg_bootstrap(int32_t exchange_value, volatile int32_t *dest); 73 74 static int32_t atomic_cmpxchg_bootstrap(int32_t compare_value, 75 int32_t exchange_value, 76 volatile int32_t *dest); 77 #endif // !AARCH64 78 79 #endif // OS_CPU_LINUX_ARM_VM_OS_LINUX_ARM_HPP