icache_x86.cpp revision 0:a61af66fc99e 
1/*
2 * Copyright 1997-2004 Sun Microsystems, Inc.  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 Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
20 * CA 95054 USA or visit www.sun.com if you need additional information or
21 * have any questions.
22 *
23 */
24
25#include "incls/_precompiled.incl"
26#include "incls/_icache_x86.cpp.incl"
27
28#define __ _masm->
29
30void ICacheStubGenerator::generate_icache_flush(ICache::flush_icache_stub_t* flush_icache_stub) {
31  StubCodeMark mark(this, "ICache", "flush_icache_stub");
32
33  address start = __ pc();
34#ifdef AMD64
35
36  const Register addr  = c_rarg0;
37  const Register lines = c_rarg1;
38  const Register magic = c_rarg2;
39
40  Label flush_line, done;
41
42  __ testl(lines, lines);
43  __ jcc(Assembler::zero, done);
44
45  // Force ordering wrt cflush.
46  // Other fence and sync instructions won't do the job.
47  __ mfence();
48
49  __ bind(flush_line);
50  __ clflush(Address(addr, 0));
51  __ addq(addr, ICache::line_size);
52  __ decrementl(lines);
53  __ jcc(Assembler::notZero, flush_line);
54
55  __ mfence();
56
57  __ bind(done);
58
59#else
60  const Address magic(rsp, 3*wordSize);
61  __ lock(); __ addl(Address(rsp, 0), 0);
62#endif // AMD64
63  __ movl(rax, magic); // Handshake with caller to make sure it happened!
64  __ ret(0);
65
66  // Must be set here so StubCodeMark destructor can call the flush stub.
67  *flush_icache_stub = (ICache::flush_icache_stub_t)start;
68}
69
70#undef __
71