utility.hh revision 4997:e7380529bd2d 
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 * Authors: Nathan Binkert
29 *          Steve Reinhardt
30 */
31
32#ifndef __ARCH_ALPHA_UTILITY_HH__
33#define __ARCH_ALPHA_UTILITY_HH__
34
35#include "config/full_system.hh"
36#include "arch/alpha/types.hh"
37#include "arch/alpha/isa_traits.hh"
38#include "arch/alpha/regfile.hh"
39#include "base/misc.hh"
40#include "cpu/thread_context.hh"
41
42namespace AlphaISA
43{
44
45    uint64_t getArgument(ThreadContext *tc, int number, bool fp);
46
47    static inline bool
48    inUserMode(ThreadContext *tc)
49    {
50        return (tc->readMiscRegNoEffect(AlphaISA::IPR_DTB_CM) & 0x18) != 0;
51    }
52
53    inline bool isCallerSaveIntegerRegister(unsigned int reg) {
54        panic("register classification not implemented");
55        return (reg >= 1 && reg <= 8 || reg >= 22 && reg <= 25 || reg == 27);
56    }
57
58    inline bool isCalleeSaveIntegerRegister(unsigned int reg) {
59        panic("register classification not implemented");
60        return (reg >= 9 && reg <= 15);
61    }
62
63    inline bool isCallerSaveFloatRegister(unsigned int reg) {
64        panic("register classification not implemented");
65        return false;
66    }
67
68    inline bool isCalleeSaveFloatRegister(unsigned int reg) {
69        panic("register classification not implemented");
70        return false;
71    }
72
73    inline Addr alignAddress(const Addr &addr,
74                                         unsigned int nbytes) {
75        return (addr & ~(nbytes - 1));
76    }
77
78    // Instruction address compression hooks
79    inline Addr realPCToFetchPC(const Addr &addr) {
80        return addr;
81    }
82
83    inline Addr fetchPCToRealPC(const Addr &addr) {
84        return addr;
85    }
86
87    // the size of "fetched" instructions (not necessarily the size
88    // of real instructions for PISA)
89    inline size_t fetchInstSize() {
90        return sizeof(MachInst);
91    }
92
93    inline MachInst makeRegisterCopy(int dest, int src) {
94        panic("makeRegisterCopy not implemented");
95        return 0;
96    }
97
98    // Machine operations
99
100    void saveMachineReg(AnyReg &savereg, const RegFile &reg_file,
101                               int regnum);
102
103    void restoreMachineReg(RegFile &regs, const AnyReg &reg,
104                                  int regnum);
105
106    /**
107     * Function to insure ISA semantics about 0 registers.
108     * @param tc The thread context.
109     */
110    template <class TC>
111    void zeroRegisters(TC *tc);
112
113    // Alpha IPR register accessors
114    inline bool PcPAL(Addr addr) { return addr & 0x3; }
115    inline void startupCPU(ThreadContext *tc, int cpuId) {
116        tc->activate(0);
117    }
118
119    ////////////////////////////////////////////////////////////////////////
120    //
121    //  Translation stuff
122    //
123
124    inline Addr PteAddr(Addr a) { return (a & PteMask) << PteShift; }
125
126    // User Virtual
127    inline bool IsUSeg(Addr a) { return USegBase <= a && a <= USegEnd; }
128
129    // Kernel Direct Mapped
130    inline bool IsK0Seg(Addr a) { return K0SegBase <= a && a <= K0SegEnd; }
131    inline Addr K0Seg2Phys(Addr addr) { return addr & ~K0SegBase; }
132
133    // Kernel Virtual
134    inline bool IsK1Seg(Addr a) { return K1SegBase <= a && a <= K1SegEnd; }
135
136    inline Addr
137    TruncPage(Addr addr)
138    { return addr & ~(PageBytes - 1); }
139
140    inline Addr
141    RoundPage(Addr addr)
142    { return (addr + PageBytes - 1) & ~(PageBytes - 1); }
143
144    void initIPRs(ThreadContext *tc, int cpuId);
145#if FULL_SYSTEM
146    void initCPU(ThreadContext *tc, int cpuId);
147
148    /**
149     * Function to check for and process any interrupts.
150     * @param tc The thread context.
151     */
152    template <class TC>
153    void processInterrupts(TC *tc);
154#endif
155
156} // namespace AlphaISA
157
158#endif
159