utility.hh revision 6329
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 "arch/alpha/types.hh" 36#include "arch/alpha/isa_traits.hh" 37#include "arch/alpha/miscregfile.hh" 38#include "base/misc.hh" 39#include "config/full_system.hh" 40#include "cpu/thread_context.hh" 41 42namespace AlphaISA { 43 44uint64_t getArgument(ThreadContext *tc, int number, bool fp); 45 46inline bool 47inUserMode(ThreadContext *tc) 48{ 49 return (tc->readMiscRegNoEffect(IPR_DTB_CM) & 0x18) != 0; 50} 51 52inline bool 53isCallerSaveIntegerRegister(unsigned int reg) 54{ 55 panic("register classification not implemented"); 56 return (reg >= 1 && reg <= 8) || (reg >= 22 && reg <= 25) || reg == 27; 57} 58 59inline bool 60isCalleeSaveIntegerRegister(unsigned int reg) 61{ 62 panic("register classification not implemented"); 63 return reg >= 9 && reg <= 15; 64} 65 66inline bool 67isCallerSaveFloatRegister(unsigned int reg) 68{ 69 panic("register classification not implemented"); 70 return false; 71} 72 73inline bool 74isCalleeSaveFloatRegister(unsigned int reg) 75{ 76 panic("register classification not implemented"); 77 return false; 78} 79 80inline Addr 81alignAddress(const Addr &addr, unsigned int nbytes) 82{ 83 return (addr & ~(nbytes - 1)); 84} 85 86// Instruction address compression hooks 87inline Addr 88realPCToFetchPC(const Addr &addr) 89{ 90 return addr; 91} 92 93inline Addr 94fetchPCToRealPC(const Addr &addr) 95{ 96 return addr; 97} 98 99// the size of "fetched" instructions (not necessarily the size 100// of real instructions for PISA) 101inline size_t 102fetchInstSize() 103{ 104 return sizeof(MachInst); 105} 106 107inline MachInst 108makeRegisterCopy(int dest, int src) 109{ 110 panic("makeRegisterCopy not implemented"); 111 return 0; 112} 113 114/** 115 * Function to insure ISA semantics about 0 registers. 116 * @param tc The thread context. 117 */ 118template <class TC> 119void zeroRegisters(TC *tc); 120 121// Alpha IPR register accessors 122inline bool PcPAL(Addr addr) { return addr & 0x3; } 123inline void startupCPU(ThreadContext *tc, int cpuId) { tc->activate(0); } 124 125//////////////////////////////////////////////////////////////////////// 126// 127// Translation stuff 128// 129 130inline Addr PteAddr(Addr a) { return (a & PteMask) << PteShift; } 131 132// User Virtual 133inline bool IsUSeg(Addr a) { return USegBase <= a && a <= USegEnd; } 134 135// Kernel Direct Mapped 136inline bool IsK0Seg(Addr a) { return K0SegBase <= a && a <= K0SegEnd; } 137inline Addr K0Seg2Phys(Addr addr) { return addr & ~K0SegBase; } 138 139// Kernel Virtual 140inline bool IsK1Seg(Addr a) { return K1SegBase <= a && a <= K1SegEnd; } 141 142inline Addr 143TruncPage(Addr addr) 144{ return addr & ~(PageBytes - 1); } 145 146inline Addr 147RoundPage(Addr addr) 148{ return (addr + PageBytes - 1) & ~(PageBytes - 1); } 149 150void initIPRs(ThreadContext *tc, int cpuId); 151#if FULL_SYSTEM 152void initCPU(ThreadContext *tc, int cpuId); 153 154/** 155 * Function to check for and process any interrupts. 156 * @param tc The thread context. 157 */ 158template <class TC> 159void processInterrupts(TC *tc); 160#endif 161 162void copyRegs(ThreadContext *src, ThreadContext *dest); 163 164void copyMiscRegs(ThreadContext *src, ThreadContext *dest); 165 166} // namespace AlphaISA 167 168#endif // __ARCH_ALPHA_UTILITY_HH__ 169