1/*
2 * Copyright (c) 2004-2005 The Regents of The University of Michigan
3 * All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions are
7 * met: redistributions of source code must retain the above copyright
8 * notice, this list of conditions and the following disclaimer;

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19 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
20 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
21 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
22 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
23 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
24 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
25 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
26 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
27 */
28
29#include "base/trace.hh"
30
31#include "cpu/o3/free_list.hh"
32
33SimpleFreeList::SimpleFreeList(unsigned activeThreads,
34 unsigned _numLogicalIntRegs,
35 unsigned _numPhysicalIntRegs,
36 unsigned _numLogicalFloatRegs,
37 unsigned _numPhysicalFloatRegs)
38 : numLogicalIntRegs(_numLogicalIntRegs),
39 numPhysicalIntRegs(_numPhysicalIntRegs),
40 numLogicalFloatRegs(_numLogicalFloatRegs),
41 numPhysicalFloatRegs(_numPhysicalFloatRegs),
42 numPhysicalRegs(numPhysicalIntRegs + numPhysicalFloatRegs)
43{
44 DPRINTF(FreeList, "Creating new free list object.\n");
45
46 // Put all of the extra physical registers onto the free list. This
47 // means excluding all of the base logical registers.
48 for (PhysRegIndex i = numLogicalIntRegs * activeThreads;
49 i < numPhysicalIntRegs; ++i)
50 {
51 freeIntRegs.push(i);
52 }
53
54 // Put all of the extra physical registers onto the free list. This
55 // means excluding all of the base logical registers. Because the
56 // float registers' indices start where the physical registers end,
57 // some math must be done to determine where the free registers start.
58 PhysRegIndex i = numPhysicalIntRegs + (numLogicalFloatRegs * activeThreads);
59
60 for ( ; i < numPhysicalRegs; ++i)
61 {
62 freeFloatRegs.push(i);
63 }
64}
65
66std::string
67SimpleFreeList::name() const
68{
69 return "cpu.freelist";
70}