registers.hh revision 2440 
1/*
2 * Copyright (c) 2003-2005 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;
9 * redistributions in binary form must reproduce the above copyright
10 * notice, this list of conditions and the following disclaimer in the
11 * documentation and/or other materials provided with the distribution;
12 * neither the name of the copyright holders nor the names of its
13 * contributors may be used to endorse or promote products derived from
14 * this software without specific prior written permission.
15 *
16 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
17 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
18 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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#ifndef __ARCH_ALPHA_REGISTERFILE_HH__
30#define __ARCH_ALPHA_REGISTERFILE_HH__
31
32#include "arch/alpha/types.hh"
33#include "arch/alpha/constants.hh"
34#include "sim/faults.hh"
35
36class Checkpoint;
37
38namespace AlphaISA
39{
40
41    typedef IntReg IntRegFile[NumIntRegs];
42
43    typedef union {
44        uint64_t q[NumFloatRegs];	// integer qword view
45        double d[NumFloatRegs];		// double-precision floating point view
46    } FloatRegFile;
47
48    class MiscRegFile {
49      protected:
50        uint64_t	fpcr;		// floating point condition codes
51        uint64_t	uniq;		// process-unique register
52        bool		lock_flag;	// lock flag for LL/SC
53        Addr		lock_addr;	// lock address for LL/SC
54
55      public:
56        MiscReg readReg(int misc_reg);
57
58        //These functions should be removed once the simplescalar cpu model
59        //has been replaced.
60        int getInstAsid();
61        int getDataAsid();
62
63        MiscReg readRegWithEffect(int misc_reg, Fault &fault, ExecContext *xc);
64
65        Fault setReg(int misc_reg, const MiscReg &val);
66
67        Fault setRegWithEffect(int misc_reg, const MiscReg &val,
68                               ExecContext *xc);
69
70        void copyMiscRegs(ExecContext *xc);
71
72#if FULL_SYSTEM
73      protected:
74        typedef uint64_t InternalProcReg;
75
76        InternalProcReg ipr[NumInternalProcRegs]; // Internal processor regs
77
78      private:
79        InternalProcReg readIpr(int idx, Fault &fault, ExecContext *xc);
80
81        Fault setIpr(int idx, InternalProcReg val, ExecContext *xc);
82
83        void copyIprs(ExecContext *xc);
84#endif
85        friend class RegFile;
86    };
87
88    struct RegFile {
89        IntRegFile intRegFile;		// (signed) integer register file
90        FloatRegFile floatRegFile;	// floating point register file
91        MiscRegFile miscRegs;		// control register file
92        Addr pc;			// program counter
93        Addr npc;			// next-cycle program counter
94        Addr nnpc;
95
96#if FULL_SYSTEM
97        int intrflag;			// interrupt flag
98        inline int instAsid()
99        { return miscRegs.getInstAsid(); }
100        inline int dataAsid()
101        { return miscRegs.getDataAsid(); }
102#endif // FULL_SYSTEM
103
104        void serialize(std::ostream &os);
105        void unserialize(Checkpoint *cp, const std::string &section);
106    };
107
108} // namespace AlphaISA
109
110#endif
111