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