utility.hh revision 3528 
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/isa_traits.hh"
35#include "base/misc.hh"
36#include "base/bitfield.hh"
37#include "cpu/thread_context.hh"
38
39namespace SparcISA
40{
41    inline ExtMachInst
42    makeExtMI(MachInst inst, ThreadContext * xc) {
43        ExtMachInst emi = (unsigned MachInst) inst;
44        //The I bit, bit 13, is used to figure out where the ASI
45        //should come from. Use that in the ExtMachInst. This is
46        //slightly redundant, but it removes the need to put a condition
47        //into all the execute functions
48        if(inst & (1 << 13))
49            emi |= (static_cast<ExtMachInst>(xc->readMiscReg(MISCREG_ASI))
50                    << (sizeof(MachInst) * 8));
51        else
52            emi |= (static_cast<ExtMachInst>(bits(inst, 12, 5))
53                    << (sizeof(MachInst) * 8));
54        return emi;
55    }
56
57    inline bool isCallerSaveIntegerRegister(unsigned int reg) {
58        panic("register classification not implemented");
59        return false;
60    }
61
62    inline bool isCalleeSaveIntegerRegister(unsigned int reg) {
63        panic("register classification not implemented");
64        return false;
65    }
66
67    inline bool isCallerSaveFloatRegister(unsigned int reg) {
68        panic("register classification not implemented");
69        return false;
70    }
71
72    inline bool isCalleeSaveFloatRegister(unsigned int reg) {
73        panic("register classification not implemented");
74        return false;
75    }
76
77    // Instruction address compression hooks
78    inline Addr realPCToFetchPC(const Addr &addr)
79    {
80        return addr;
81    }
82
83    inline Addr fetchPCToRealPC(const Addr &addr)
84    {
85        return addr;
86    }
87
88    // the size of "fetched" instructions (not necessarily the size
89    // of real instructions for PISA)
90    inline size_t fetchInstSize()
91    {
92        return sizeof(MachInst);
93    }
94
95    /**
96     * Function to insure ISA semantics about 0 registers.
97     * @param tc The thread context.
98     */
99    template <class TC>
100    void zeroRegisters(TC *tc);
101
102    void initCPU(ThreadContext *tc, int cpuId)
103    {
104        //This would be a good place to stick a PowerOnReset fault into the
105        //cpu.
106    }
107
108} // namespace SparcISA
109
110#endif
111