isa_traits.hh revision 5228
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: Steve Reinhardt 29 * Gabe Black 30 */ 31 32#ifndef __ARCH_ALPHA_ISA_TRAITS_HH__ 33#define __ARCH_ALPHA_ISA_TRAITS_HH__ 34 35namespace LittleEndianGuest {} 36 37#include "arch/alpha/ipr.hh" 38#include "arch/alpha/max_inst_regs.hh" 39#include "arch/alpha/types.hh" 40#include "config/full_system.hh" 41#include "sim/host.hh" 42 43class StaticInstPtr; 44 45namespace AlphaISA 46{ 47 using namespace LittleEndianGuest; 48 using AlphaISAInst::MaxInstSrcRegs; 49 using AlphaISAInst::MaxInstDestRegs; 50 51 // These enumerate all the registers for dependence tracking. 52 enum DependenceTags { 53 // 0..31 are the integer regs 0..31 54 // 32..63 are the FP regs 0..31, i.e. use (reg + FP_Base_DepTag) 55 FP_Base_DepTag = 40, 56 Ctrl_Base_DepTag = 72 57 }; 58 59 StaticInstPtr decodeInst(ExtMachInst); 60 61 // Alpha Does NOT have a delay slot 62 #define ISA_HAS_DELAY_SLOT 0 63 64 const Addr PageShift = 13; 65 const Addr PageBytes = ULL(1) << PageShift; 66 const Addr PageMask = ~(PageBytes - 1); 67 const Addr PageOffset = PageBytes - 1; 68 69 70 //////////////////////////////////////////////////////////////////////// 71 // 72 // Translation stuff 73 // 74 75 const Addr PteShift = 3; 76 const Addr NPtePageShift = PageShift - PteShift; 77 const Addr NPtePage = ULL(1) << NPtePageShift; 78 const Addr PteMask = NPtePage - 1; 79 80 // User Virtual 81 const Addr USegBase = ULL(0x0); 82 const Addr USegEnd = ULL(0x000003ffffffffff); 83 84 // Kernel Direct Mapped 85 const Addr K0SegBase = ULL(0xfffffc0000000000); 86 const Addr K0SegEnd = ULL(0xfffffdffffffffff); 87 88 // Kernel Virtual 89 const Addr K1SegBase = ULL(0xfffffe0000000000); 90 const Addr K1SegEnd = ULL(0xffffffffffffffff); 91 92 // For loading... XXX This maybe could be USegEnd?? --ali 93 const Addr LoadAddrMask = ULL(0xffffffffff); 94 95#if FULL_SYSTEM 96 97 //////////////////////////////////////////////////////////////////////// 98 // 99 // Interrupt levels 100 // 101 enum InterruptLevels 102 { 103 INTLEVEL_SOFTWARE_MIN = 4, 104 INTLEVEL_SOFTWARE_MAX = 19, 105 106 INTLEVEL_EXTERNAL_MIN = 20, 107 INTLEVEL_EXTERNAL_MAX = 34, 108 109 INTLEVEL_IRQ0 = 20, 110 INTLEVEL_IRQ1 = 21, 111 INTINDEX_ETHERNET = 0, 112 INTINDEX_SCSI = 1, 113 INTLEVEL_IRQ2 = 22, 114 INTLEVEL_IRQ3 = 23, 115 116 INTLEVEL_SERIAL = 33, 117 118 NumInterruptLevels = INTLEVEL_EXTERNAL_MAX 119 }; 120 121#endif 122 123 // EV5 modes 124 enum mode_type 125 { 126 mode_kernel = 0, // kernel 127 mode_executive = 1, // executive (unused by unix) 128 mode_supervisor = 2, // supervisor (unused by unix) 129 mode_user = 3, // user mode 130 mode_number // number of modes 131 }; 132 133 // Constants Related to the number of registers 134 135 const int NumIntArchRegs = 32; 136 const int NumPALShadowRegs = 8; 137 const int NumFloatArchRegs = 32; 138 // @todo: Figure out what this number really should be. 139 const int NumMiscArchRegs = 77; 140 141 const int NumIntRegs = NumIntArchRegs + NumPALShadowRegs; 142 const int NumFloatRegs = NumFloatArchRegs; 143 const int NumMiscRegs = NumMiscArchRegs; 144 145 const int TotalNumRegs = NumIntRegs + NumFloatRegs + 146 NumMiscRegs + NumInternalProcRegs; 147 148 const int TotalDataRegs = NumIntRegs + NumFloatRegs; 149 150 // semantically meaningful register indices 151 const int ZeroReg = 31; // architecturally meaningful 152 // the rest of these depend on the ABI 153 const int StackPointerReg = 30; 154 const int GlobalPointerReg = 29; 155 const int ProcedureValueReg = 27; 156 const int ReturnAddressReg = 26; 157 const int ReturnValueReg = 0; 158 const int FramePointerReg = 15; 159 160 const int ArgumentReg[] = {16, 17, 18, 19, 20, 21}; 161 const int NumArgumentRegs = sizeof(ArgumentReg) / sizeof(const int); 162 163 const int SyscallNumReg = ReturnValueReg; 164 const int SyscallPseudoReturnReg = ArgumentReg[4]; 165 const int SyscallSuccessReg = 19; 166 167 const int LogVMPageSize = 13; // 8K bytes 168 const int VMPageSize = (1 << LogVMPageSize); 169 170 const int BranchPredAddrShiftAmt = 2; // instructions are 4-byte aligned 171 172 const int MachineBytes = 8; 173 const int WordBytes = 4; 174 const int HalfwordBytes = 2; 175 const int ByteBytes = 1; 176 177 // return a no-op instruction... used for instruction fetch faults 178 // Alpha UNOP (ldq_u r31,0(r0)) 179 const ExtMachInst NoopMachInst = 0x2ffe0000; 180 181}; 182 183#endif // __ARCH_ALPHA_ISA_TRAITS_HH__ 184