isa_traits.hh revision 4997 
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 *          Ali Saidi
30 */
31
32#ifndef __ARCH_SPARC_ISA_TRAITS_HH__
33#define __ARCH_SPARC_ISA_TRAITS_HH__
34
35#include "arch/sparc/types.hh"
36#include "arch/sparc/sparc_traits.hh"
37#include "config/full_system.hh"
38#include "sim/host.hh"
39
40class StaticInstPtr;
41
42namespace BigEndianGuest {}
43
44namespace SparcISA
45{
46    class RegFile;
47
48    const int MachineBytes = 8;
49
50    //This makes sure the big endian versions of certain functions are used.
51    using namespace BigEndianGuest;
52
53    // SPARC has a delay slot
54    #define ISA_HAS_DELAY_SLOT 1
55
56    // SPARC NOP (sethi %(hi(0), g0)
57    const MachInst NoopMachInst = 0x01000000;
58
59    // These enumerate all the registers for dependence tracking.
60    enum DependenceTags {
61        FP_Base_DepTag = 32*3+9,
62        Ctrl_Base_DepTag = FP_Base_DepTag + 64
63    };
64
65    // semantically meaningful register indices
66    const int ZeroReg = 0;	// architecturally meaningful
67    // the rest of these depend on the ABI
68    const int StackPointerReg = 14;
69    const int ReturnAddressReg = 31; // post call, precall is 15
70    const int ReturnValueReg = 8; // Post return, 24 is pre-return.
71    const int FramePointerReg = 30;
72
73    const int ArgumentReg[] = {8, 9, 10, 11, 12, 13};
74    const int NumArgumentRegs = sizeof(ArgumentReg) / sizeof(const int);
75
76    // Some OS syscall use a second register (o1) to return a second value
77    const int SyscallPseudoReturnReg = ArgumentReg[1];
78
79    //XXX These numbers are bogus
80    const int MaxInstSrcRegs = 8;
81    const int MaxInstDestRegs = 9;
82
83    //8K. This value is implmentation specific; and should probably
84    //be somewhere else.
85    const int LogVMPageSize = 13;
86    const int VMPageSize = (1 << LogVMPageSize);
87
88    // real address virtual mapping
89    // sort of like alpha super page, but less frequently used
90    const Addr SegKPMEnd  = ULL(0xfffffffc00000000);
91    const Addr SegKPMBase = ULL(0xfffffac000000000);
92
93    //Why does both the previous set of constants and this one exist?
94    const int PageShift = 13;
95    const int PageBytes = 1ULL << PageShift;
96
97    const int BranchPredAddrShiftAmt = 2;
98
99    StaticInstPtr decodeInst(ExtMachInst);
100
101    /////////// TLB Stuff ////////////
102    const Addr StartVAddrHole = ULL(0x0000800000000000);
103    const Addr EndVAddrHole = ULL(0xFFFF7FFFFFFFFFFF);
104    const Addr VAddrAMask = ULL(0xFFFFFFFF);
105    const Addr PAddrImplMask = ULL(0x000000FFFFFFFFFF);
106    const Addr BytesInPageMask = ULL(0x1FFF);
107
108#if FULL_SYSTEM
109    // I don't know what it's for, so I don't
110    // know what SPARC's value should be
111    // For loading... XXX This maybe could be USegEnd?? --ali
112    const Addr LoadAddrMask = ULL(0xffffffffff);
113
114    enum InterruptTypes
115    {
116        IT_TRAP_LEVEL_ZERO,
117        IT_HINTP,
118        IT_INT_VEC,
119        IT_CPU_MONDO,
120        IT_DEV_MONDO,
121        IT_RES_ERROR,
122        IT_SOFT_INT,
123        NumInterruptTypes
124    };
125
126#endif
127}
128
129#endif // __ARCH_SPARC_ISA_TRAITS_HH__
130