utility.hh revision 3532 
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: Gabe Black
29 */
30
31#ifndef __ARCH_SPARC_UTILITY_HH__
32#define __ARCH_SPARC_UTILITY_HH__
33
34#include "arch/sparc/faults.hh"
35#include "arch/sparc/isa_traits.hh"
36#include "base/misc.hh"
37#include "base/bitfield.hh"
38#include "cpu/thread_context.hh"
39
40namespace SparcISA
41{
42    inline ExtMachInst
43    makeExtMI(MachInst inst, ThreadContext * xc) {
44        ExtMachInst emi = (unsigned MachInst) inst;
45        //The I bit, bit 13, is used to figure out where the ASI
46        //should come from. Use that in the ExtMachInst. This is
47        //slightly redundant, but it removes the need to put a condition
48        //into all the execute functions
49        if(inst & (1 << 13))
50            emi |= (static_cast<ExtMachInst>(xc->readMiscReg(MISCREG_ASI))
51                    << (sizeof(MachInst) * 8));
52        else
53            emi |= (static_cast<ExtMachInst>(bits(inst, 12, 5))
54                    << (sizeof(MachInst) * 8));
55        return emi;
56    }
57
58    inline bool isCallerSaveIntegerRegister(unsigned int reg) {
59        panic("register classification not implemented");
60        return false;
61    }
62
63    inline bool isCalleeSaveIntegerRegister(unsigned int reg) {
64        panic("register classification not implemented");
65        return false;
66    }
67
68    inline bool isCallerSaveFloatRegister(unsigned int reg) {
69        panic("register classification not implemented");
70        return false;
71    }
72
73    inline bool isCalleeSaveFloatRegister(unsigned int reg) {
74        panic("register classification not implemented");
75        return false;
76    }
77
78    // Instruction address compression hooks
79    inline Addr realPCToFetchPC(const Addr &addr)
80    {
81        return addr;
82    }
83
84    inline Addr fetchPCToRealPC(const Addr &addr)
85    {
86        return addr;
87    }
88
89    // the size of "fetched" instructions (not necessarily the size
90    // of real instructions for PISA)
91    inline size_t fetchInstSize()
92    {
93        return sizeof(MachInst);
94    }
95
96    /**
97     * Function to insure ISA semantics about 0 registers.
98     * @param tc The thread context.
99     */
100    template <class TC>
101    void zeroRegisters(TC *tc);
102
103    inline void initCPU(ThreadContext *tc, int cpuId)
104    {
105        static Fault por = new PowerOnReset();
106        por->invoke(tc);
107    }
108
109} // namespace SparcISA
110
111#endif
112