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comparison src/cpu/x86/vm/icache_x86.cpp @ 0:a61af66fc99e jdk7-b24

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author duke
date Sat, 01 Dec 2007 00:00:00 +0000
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children dc7f315e41f7
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-1:000000000000 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
30 void 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 __