--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/hotspot/src/cpu/x86/vm/icache_x86.cpp	Sat Dec 01 00:00:00 2007 +0000
@@ -0,0 +1,70 @@
+/*
+ * Copyright 1997-2004 Sun Microsystems, Inc.  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 Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
+ * CA 95054 USA or visit www.sun.com if you need additional information or
+ * have any questions.
+ *
+ */
+
+#include "incls/_precompiled.incl"
+#include "incls/_icache_x86.cpp.incl"
+
+#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));
+  __ addq(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
+  __ movl(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 __