1 #ifdef USE_PRAGMA_IDENT_SRC 2 #pragma ident "@(#)icache_x86.cpp 1.22 07/09/17 09:33:47 JVM" 3 #endif 4 /* 5 * Copyright 1997-2004 Sun Microsystems, Inc. All Rights Reserved. 6 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. 7 * 8 * This code is free software; you can redistribute it and/or modify it 9 * under the terms of the GNU General Public License version 2 only, as 10 * published by the Free Software Foundation. 11 * 12 * This code is distributed in the hope that it will be useful, but WITHOUT 13 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 14 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 15 * version 2 for more details (a copy is included in the LICENSE file that 16 * accompanied this code). 17 * 18 * You should have received a copy of the GNU General Public License version 19 * 2 along with this work; if not, write to the Free Software Foundation, 20 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. 21 * 22 * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara, 23 * CA 95054 USA or visit www.sun.com if you need additional information or 24 * have any questions. 25 * 26 */ 27 28 #include "incls/_precompiled.incl" 29 #include "incls/_icache_x86.cpp.incl" 30 31 #define __ _masm-> 32 33 void ICacheStubGenerator::generate_icache_flush(ICache::flush_icache_stub_t* flush_icache_stub) { 34 StubCodeMark mark(this, "ICache", "flush_icache_stub"); 35 36 address start = __ pc(); 37 #ifdef AMD64 38 39 const Register addr = c_rarg0; 40 const Register lines = c_rarg1; 41 const Register magic = c_rarg2; 42 43 Label flush_line, done; 44 45 __ testl(lines, lines); 46 __ jcc(Assembler::zero, done); 47 48 // Force ordering wrt cflush. 49 // Other fence and sync instructions won't do the job. 50 __ mfence(); 51 52 __ bind(flush_line); 53 __ clflush(Address(addr, 0)); 54 __ addq(addr, ICache::line_size); 55 __ decrementl(lines); 56 __ jcc(Assembler::notZero, flush_line); 57 58 __ mfence(); 59 60 __ bind(done); 61 62 #else 63 const Address magic(rsp, 3*wordSize); 64 __ lock(); __ addl(Address(rsp, 0), 0); 65 #endif // AMD64 66 __ movl(rax, magic); // Handshake with caller to make sure it happened! 67 __ ret(0); 68 69 // Must be set here so StubCodeMark destructor can call the flush stub. 70 *flush_icache_stub = (ICache::flush_icache_stub_t)start; 71 } 72 73 #undef __