1 /* 2 * Copyright (c) 2008, 2016, 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 #include "precompiled.hpp" 26 #include "asm/macroAssembler.hpp" 27 #include "assembler_arm.inline.hpp" 28 #include "runtime/icache.hpp" 29 30 #define __ _masm-> 31 32 #ifdef AARCH64 33 34 static int icache_flush(address addr, int lines, int magic) { 35 // TODO-AARCH64 Figure out actual cache line size (mrs Xt, CTR_EL0) 36 37 address p = addr; 38 for (int i = 0; i < lines; i++, p += ICache::line_size) { 39 __asm__ volatile( 40 " dc cvau, %[p]" 41 : 42 : [p] "r" (p) 43 : "memory"); 44 } 45 46 __asm__ volatile( 47 " dsb ish" 48 : : : "memory"); 49 50 p = addr; 51 for (int i = 0; i < lines; i++, p += ICache::line_size) { 52 __asm__ volatile( 53 " ic ivau, %[p]" 54 : 55 : [p] "r" (p) 56 : "memory"); 57 } 58 59 __asm__ volatile( 60 " dsb ish\n\t" 61 " isb\n\t" 62 : : : "memory"); 63 64 return magic; 65 } 66 67 #else 68 69 static int icache_flush(address addr, int lines, int magic) { 70 __builtin___clear_cache(addr, addr + (lines << ICache::log2_line_size)); 71 return magic; 72 } 73 74 #endif // AARCH64 75 76 void ICacheStubGenerator::generate_icache_flush(ICache::flush_icache_stub_t* flush_icache_stub) { 77 address start = (address)icache_flush; 78 79 *flush_icache_stub = (ICache::flush_icache_stub_t)start; 80 81 // ICache::invalidate_range() contains explicit condition that the first 82 // call is invoked on the generated icache flush stub code range. 83 ICache::invalidate_range(start, 0); 84 85 { 86 // dummy code mark to make the shared code happy 87 // (fields that would need to be modified to emulate the correct 88 // mark are not accessible) 89 StubCodeMark mark(this, "ICache", "fake_stub_for_inlined_icache_flush"); 90 __ ret(); 91 } 92 } 93 94 #undef __