1 /* 2 * Copyright (c) 1997, 2020, Oracle and/or its affiliates. All rights reserved. 3 * Copyright (c) 2014, Red Hat Inc. All rights reserved. 4 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. 5 * 6 * This code is free software; you can redistribute it and/or modify it 7 * under the terms of the GNU General Public License version 2 only, as 8 * published by the Free Software Foundation. 9 * 10 * This code is distributed in the hope that it will be useful, but WITHOUT 11 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 12 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 13 * version 2 for more details (a copy is included in the LICENSE file that 14 * accompanied this code). 15 * 16 * You should have received a copy of the GNU General Public License version 17 * 2 along with this work; if not, write to the Free Software Foundation, 18 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. 19 * 20 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA 21 * or visit www.oracle.com if you need additional information or have any 22 * questions. 23 * 24 */ 25 26 #ifndef CPU_AARCH64_ICACHE_AARCH64_HPP 27 #define CPU_AARCH64_ICACHE_AARCH64_HPP 28 29 // Interface for updating the instruction cache. Whenever the VM 30 // modifies code, part of the processor instruction cache potentially 31 // has to be flushed. 32 33 class ICache : public AbstractICache { 34 private: 35 #ifdef _WIN64 36 // __builtin___clear_cache is a GCC intrinsic, and is then not available in 37 // MSVC. Define an equivalent method which calls the right Win32/MSVC 38 // intrinsic. 39 static void __builtin___clear_cache(char *start, char *end) { 40 FlushInstructionCache((HANDLE)GetCurrentProcess(), start, (SIZE_T)(end - start)); 41 } 42 #endif 43 public: 44 static void initialize(); 45 static void invalidate_word(address addr) { 46 __builtin___clear_cache((char *)addr, (char *)(addr + 3)); 47 } 48 static void invalidate_range(address start, int nbytes) { 49 __builtin___clear_cache((char *)start, (char *)(start + nbytes)); 50 } 51 }; 52 53 #endif // CPU_AARCH64_ICACHE_AARCH64_HPP