duke@435: /*
stefank@2314:  * Copyright (c) 1997, 2010, Oracle and/or its affiliates. All rights reserved.
duke@435:  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
duke@435:  *
duke@435:  * This code is free software; you can redistribute it and/or modify it
duke@435:  * under the terms of the GNU General Public License version 2 only, as
duke@435:  * published by the Free Software Foundation.
duke@435:  *
duke@435:  * This code is distributed in the hope that it will be useful, but WITHOUT
duke@435:  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
duke@435:  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
duke@435:  * version 2 for more details (a copy is included in the LICENSE file that
duke@435:  * accompanied this code).
duke@435:  *
duke@435:  * You should have received a copy of the GNU General Public License version
duke@435:  * 2 along with this work; if not, write to the Free Software Foundation,
duke@435:  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
duke@435:  *
trims@1907:  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
trims@1907:  * or visit www.oracle.com if you need additional information or have any
trims@1907:  * questions.
duke@435:  *
duke@435:  */
duke@435: 
stefank@2314: #include "precompiled.hpp"
twisti@4318: #include "asm/macroAssembler.hpp"
stefank@2314: #include "runtime/icache.hpp"
duke@435: 
duke@435: #define __ _masm->
duke@435: 
duke@435: void ICacheStubGenerator::generate_icache_flush(ICache::flush_icache_stub_t* flush_icache_stub) {
duke@435:   StubCodeMark mark(this, "ICache", "flush_icache_stub");
duke@435: 
duke@435:   address start = __ pc();
duke@435: #ifdef AMD64
duke@435: 
duke@435:   const Register addr  = c_rarg0;
duke@435:   const Register lines = c_rarg1;
duke@435:   const Register magic = c_rarg2;
duke@435: 
duke@435:   Label flush_line, done;
duke@435: 
duke@435:   __ testl(lines, lines);
duke@435:   __ jcc(Assembler::zero, done);
duke@435: 
duke@435:   // Force ordering wrt cflush.
duke@435:   // Other fence and sync instructions won't do the job.
duke@435:   __ mfence();
duke@435: 
duke@435:   __ bind(flush_line);
duke@435:   __ clflush(Address(addr, 0));
never@739:   __ addptr(addr, ICache::line_size);
duke@435:   __ decrementl(lines);
duke@435:   __ jcc(Assembler::notZero, flush_line);
duke@435: 
duke@435:   __ mfence();
duke@435: 
duke@435:   __ bind(done);
duke@435: 
duke@435: #else
duke@435:   const Address magic(rsp, 3*wordSize);
duke@435:   __ lock(); __ addl(Address(rsp, 0), 0);
duke@435: #endif // AMD64
never@739:   __ movptr(rax, magic); // Handshake with caller to make sure it happened!
duke@435:   __ ret(0);
duke@435: 
duke@435:   // Must be set here so StubCodeMark destructor can call the flush stub.
duke@435:   *flush_icache_stub = (ICache::flush_icache_stub_t)start;
duke@435: }
duke@435: 
duke@435: #undef __