utility.hh revision 7680:f4eda002333b
1/* 2 * Copyright (c) 2010 ARM Limited 3 * All rights reserved 4 * 5 * The license below extends only to copyright in the software and shall 6 * not be construed as granting a license to any other intellectual 7 * property including but not limited to intellectual property relating 8 * to a hardware implementation of the functionality of the software 9 * licensed hereunder. You may use the software subject to the license 10 * terms below provided that you ensure that this notice is replicated 11 * unmodified and in its entirety in all distributions of the software, 12 * modified or unmodified, in source code or in binary form. 13 * 14 * Copyright (c) 2003-2005 The Regents of The University of Michigan 15 * Copyright (c) 2007-2008 The Florida State University 16 * All rights reserved. 17 * 18 * Redistribution and use in source and binary forms, with or without 19 * modification, are permitted provided that the following conditions are 20 * met: redistributions of source code must retain the above copyright 21 * notice, this list of conditions and the following disclaimer; 22 * redistributions in binary form must reproduce the above copyright 23 * notice, this list of conditions and the following disclaimer in the 24 * documentation and/or other materials provided with the distribution; 25 * neither the name of the copyright holders nor the names of its 26 * contributors may be used to endorse or promote products derived from 27 * this software without specific prior written permission. 28 * 29 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 30 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 31 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR 32 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT 33 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 34 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 35 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 36 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 37 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 38 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 39 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 40 * 41 * Authors: Korey Sewell 42 * Stephen Hines 43 */ 44 45#ifndef __ARCH_ARM_UTILITY_HH__ 46#define __ARCH_ARM_UTILITY_HH__ 47 48#include "arch/arm/miscregs.hh" 49#include "arch/arm/types.hh" 50#include "base/misc.hh" 51#include "base/trace.hh" 52#include "base/types.hh" 53#include "cpu/thread_context.hh" 54 55namespace ArmISA { 56 57 inline bool 58 testPredicate(CPSR cpsr, ConditionCode code) 59 { 60 switch (code) 61 { 62 case COND_EQ: return cpsr.z; 63 case COND_NE: return !cpsr.z; 64 case COND_CS: return cpsr.c; 65 case COND_CC: return !cpsr.c; 66 case COND_MI: return cpsr.n; 67 case COND_PL: return !cpsr.n; 68 case COND_VS: return cpsr.v; 69 case COND_VC: return !cpsr.v; 70 case COND_HI: return (cpsr.c && !cpsr.z); 71 case COND_LS: return !(cpsr.c && !cpsr.z); 72 case COND_GE: return !(cpsr.n ^ cpsr.v); 73 case COND_LT: return (cpsr.n ^ cpsr.v); 74 case COND_GT: return !(cpsr.n ^ cpsr.v || cpsr.z); 75 case COND_LE: return (cpsr.n ^ cpsr.v || cpsr.z); 76 case COND_AL: return true; 77 case COND_UC: return true; 78 default: 79 panic("Unhandled predicate condition: %d\n", code); 80 } 81 } 82 83 /** 84 * Function to insure ISA semantics about 0 registers. 85 * @param tc The thread context. 86 */ 87 template <class TC> 88 void zeroRegisters(TC *tc); 89 90 inline void startupCPU(ThreadContext *tc, int cpuId) 91 { 92 tc->activate(0); 93 } 94 95 static inline void 96 copyRegs(ThreadContext *src, ThreadContext *dest) 97 { 98 panic("Copy Regs Not Implemented Yet\n"); 99 } 100 101 static inline void 102 copyMiscRegs(ThreadContext *src, ThreadContext *dest) 103 { 104 panic("Copy Misc. Regs Not Implemented Yet\n"); 105 } 106 107 void initCPU(ThreadContext *tc, int cpuId); 108 109 static inline bool 110 inUserMode(CPSR cpsr) 111 { 112 return cpsr.mode == MODE_USER; 113 } 114 115 static inline bool 116 inUserMode(ThreadContext *tc) 117 { 118 return inUserMode(tc->readMiscRegNoEffect(MISCREG_CPSR)); 119 } 120 121 static inline bool 122 inPrivilegedMode(CPSR cpsr) 123 { 124 return !inUserMode(cpsr); 125 } 126 127 static inline bool 128 inPrivilegedMode(ThreadContext *tc) 129 { 130 return !inUserMode(tc); 131 } 132 133 static inline bool 134 vfpEnabled(CPACR cpacr, CPSR cpsr) 135 { 136 return cpacr.cp10 == 0x3 || 137 (cpacr.cp10 == 0x1 && inPrivilegedMode(cpsr)); 138 } 139 140 static inline bool 141 vfpEnabled(CPACR cpacr, CPSR cpsr, FPEXC fpexc) 142 { 143 return fpexc.en && vfpEnabled(cpacr, cpsr); 144 } 145 146 static inline bool 147 neonEnabled(CPACR cpacr, CPSR cpsr, FPEXC fpexc) 148 { 149 return !cpacr.asedis && vfpEnabled(cpacr, cpsr, fpexc); 150 } 151 152uint64_t getArgument(ThreadContext *tc, int number, bool fp); 153 154Fault setCp15Register(uint32_t &Rd, int CRn, int opc1, int CRm, int opc2); 155Fault readCp15Register(uint32_t &Rd, int CRn, int opc1, int CRm, int opc2); 156 157}; 158 159 160#endif 161