| /* |
| * Copyright (c) 1997, 2010, Oracle and/or its affiliates. All rights reserved. |
| * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
| * |
| * This code is free software; you can redistribute it and/or modify it |
| * under the terms of the GNU General Public License version 2 only, as |
| * published by the Free Software Foundation. |
| * |
| * This code is distributed in the hope that it will be useful, but WITHOUT |
| * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
| * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
| * version 2 for more details (a copy is included in the LICENSE file that |
| * accompanied this code). |
| * |
| * You should have received a copy of the GNU General Public License version |
| * 2 along with this work; if not, write to the Free Software Foundation, |
| * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
| * |
| * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
| * or visit www.oracle.com if you need additional information or have any |
| * questions. |
| * |
| */ |
| |
| #include "precompiled.hpp" |
| #include "asm/macroAssembler.hpp" |
| #include "runtime/icache.hpp" |
| |
| #define __ _masm-> |
| |
| void ICacheStubGenerator::generate_icache_flush(ICache::flush_icache_stub_t* flush_icache_stub) { |
| StubCodeMark mark(this, "ICache", "flush_icache_stub"); |
| |
| address start = __ pc(); |
| #ifdef AMD64 |
| |
| const Register addr = c_rarg0; |
| const Register lines = c_rarg1; |
| const Register magic = c_rarg2; |
| |
| Label flush_line, done; |
| |
| __ testl(lines, lines); |
| __ jcc(Assembler::zero, done); |
| |
| // Force ordering wrt cflush. |
| // Other fence and sync instructions won't do the job. |
| __ mfence(); |
| |
| __ bind(flush_line); |
| __ clflush(Address(addr, 0)); |
| __ addptr(addr, ICache::line_size); |
| __ decrementl(lines); |
| __ jcc(Assembler::notZero, flush_line); |
| |
| __ mfence(); |
| |
| __ bind(done); |
| |
| #else |
| const Address magic(rsp, 3*wordSize); |
| __ lock(); __ addl(Address(rsp, 0), 0); |
| #endif // AMD64 |
| __ movptr(rax, magic); // Handshake with caller to make sure it happened! |
| __ ret(0); |
| |
| // Must be set here so StubCodeMark destructor can call the flush stub. |
| *flush_icache_stub = (ICache::flush_icache_stub_t)start; |
| } |
| |
| #undef __ |
