hotspot/src/cpu/x86/vm/icache_x86.cpp
author duke
Sat, 01 Dec 2007 00:00:00 +0000
changeset 1 489c9b5090e2
child 1066 717c3345024f
permissions -rw-r--r--
Initial load
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
     1
/*
489c9b5090e2 Initial load
duke
parents:
diff changeset
     2
 * Copyright 1997-2004 Sun Microsystems, Inc.  All Rights Reserved.
489c9b5090e2 Initial load
duke
parents:
diff changeset
     3
 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
489c9b5090e2 Initial load
duke
parents:
diff changeset
     4
 *
489c9b5090e2 Initial load
duke
parents:
diff changeset
     5
 * This code is free software; you can redistribute it and/or modify it
489c9b5090e2 Initial load
duke
parents:
diff changeset
     6
 * under the terms of the GNU General Public License version 2 only, as
489c9b5090e2 Initial load
duke
parents:
diff changeset
     7
 * published by the Free Software Foundation.
489c9b5090e2 Initial load
duke
parents:
diff changeset
     8
 *
489c9b5090e2 Initial load
duke
parents:
diff changeset
     9
 * This code is distributed in the hope that it will be useful, but WITHOUT
489c9b5090e2 Initial load
duke
parents:
diff changeset
    10
 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
489c9b5090e2 Initial load
duke
parents:
diff changeset
    11
 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
489c9b5090e2 Initial load
duke
parents:
diff changeset
    12
 * version 2 for more details (a copy is included in the LICENSE file that
489c9b5090e2 Initial load
duke
parents:
diff changeset
    13
 * accompanied this code).
489c9b5090e2 Initial load
duke
parents:
diff changeset
    14
 *
489c9b5090e2 Initial load
duke
parents:
diff changeset
    15
 * You should have received a copy of the GNU General Public License version
489c9b5090e2 Initial load
duke
parents:
diff changeset
    16
 * 2 along with this work; if not, write to the Free Software Foundation,
489c9b5090e2 Initial load
duke
parents:
diff changeset
    17
 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
489c9b5090e2 Initial load
duke
parents:
diff changeset
    18
 *
489c9b5090e2 Initial load
duke
parents:
diff changeset
    19
 * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
489c9b5090e2 Initial load
duke
parents:
diff changeset
    20
 * CA 95054 USA or visit www.sun.com if you need additional information or
489c9b5090e2 Initial load
duke
parents:
diff changeset
    21
 * have any questions.
489c9b5090e2 Initial load
duke
parents:
diff changeset
    22
 *
489c9b5090e2 Initial load
duke
parents:
diff changeset
    23
 */
489c9b5090e2 Initial load
duke
parents:
diff changeset
    24
489c9b5090e2 Initial load
duke
parents:
diff changeset
    25
#include "incls/_precompiled.incl"
489c9b5090e2 Initial load
duke
parents:
diff changeset
    26
#include "incls/_icache_x86.cpp.incl"
489c9b5090e2 Initial load
duke
parents:
diff changeset
    27
489c9b5090e2 Initial load
duke
parents:
diff changeset
    28
#define __ _masm->
489c9b5090e2 Initial load
duke
parents:
diff changeset
    29
489c9b5090e2 Initial load
duke
parents:
diff changeset
    30
void ICacheStubGenerator::generate_icache_flush(ICache::flush_icache_stub_t* flush_icache_stub) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
    31
  StubCodeMark mark(this, "ICache", "flush_icache_stub");
489c9b5090e2 Initial load
duke
parents:
diff changeset
    32
489c9b5090e2 Initial load
duke
parents:
diff changeset
    33
  address start = __ pc();
489c9b5090e2 Initial load
duke
parents:
diff changeset
    34
#ifdef AMD64
489c9b5090e2 Initial load
duke
parents:
diff changeset
    35
489c9b5090e2 Initial load
duke
parents:
diff changeset
    36
  const Register addr  = c_rarg0;
489c9b5090e2 Initial load
duke
parents:
diff changeset
    37
  const Register lines = c_rarg1;
489c9b5090e2 Initial load
duke
parents:
diff changeset
    38
  const Register magic = c_rarg2;
489c9b5090e2 Initial load
duke
parents:
diff changeset
    39
489c9b5090e2 Initial load
duke
parents:
diff changeset
    40
  Label flush_line, done;
489c9b5090e2 Initial load
duke
parents:
diff changeset
    41
489c9b5090e2 Initial load
duke
parents:
diff changeset
    42
  __ testl(lines, lines);
489c9b5090e2 Initial load
duke
parents:
diff changeset
    43
  __ jcc(Assembler::zero, done);
489c9b5090e2 Initial load
duke
parents:
diff changeset
    44
489c9b5090e2 Initial load
duke
parents:
diff changeset
    45
  // Force ordering wrt cflush.
489c9b5090e2 Initial load
duke
parents:
diff changeset
    46
  // Other fence and sync instructions won't do the job.
489c9b5090e2 Initial load
duke
parents:
diff changeset
    47
  __ mfence();
489c9b5090e2 Initial load
duke
parents:
diff changeset
    48
489c9b5090e2 Initial load
duke
parents:
diff changeset
    49
  __ bind(flush_line);
489c9b5090e2 Initial load
duke
parents:
diff changeset
    50
  __ clflush(Address(addr, 0));
489c9b5090e2 Initial load
duke
parents:
diff changeset
    51
  __ addq(addr, ICache::line_size);
489c9b5090e2 Initial load
duke
parents:
diff changeset
    52
  __ decrementl(lines);
489c9b5090e2 Initial load
duke
parents:
diff changeset
    53
  __ jcc(Assembler::notZero, flush_line);
489c9b5090e2 Initial load
duke
parents:
diff changeset
    54
489c9b5090e2 Initial load
duke
parents:
diff changeset
    55
  __ mfence();
489c9b5090e2 Initial load
duke
parents:
diff changeset
    56
489c9b5090e2 Initial load
duke
parents:
diff changeset
    57
  __ bind(done);
489c9b5090e2 Initial load
duke
parents:
diff changeset
    58
489c9b5090e2 Initial load
duke
parents:
diff changeset
    59
#else
489c9b5090e2 Initial load
duke
parents:
diff changeset
    60
  const Address magic(rsp, 3*wordSize);
489c9b5090e2 Initial load
duke
parents:
diff changeset
    61
  __ lock(); __ addl(Address(rsp, 0), 0);
489c9b5090e2 Initial load
duke
parents:
diff changeset
    62
#endif // AMD64
489c9b5090e2 Initial load
duke
parents:
diff changeset
    63
  __ movl(rax, magic); // Handshake with caller to make sure it happened!
489c9b5090e2 Initial load
duke
parents:
diff changeset
    64
  __ ret(0);
489c9b5090e2 Initial load
duke
parents:
diff changeset
    65
489c9b5090e2 Initial load
duke
parents:
diff changeset
    66
  // Must be set here so StubCodeMark destructor can call the flush stub.
489c9b5090e2 Initial load
duke
parents:
diff changeset
    67
  *flush_icache_stub = (ICache::flush_icache_stub_t)start;
489c9b5090e2 Initial load
duke
parents:
diff changeset
    68
}
489c9b5090e2 Initial load
duke
parents:
diff changeset
    69
489c9b5090e2 Initial load
duke
parents:
diff changeset
    70
#undef __