ua2005.cc revision 2651
1/* 2 * Copyright (c) 2006 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 29#include "arch/sparc/regfile.hh" 30 31Fault 32SparcISA::MiscRegFile::setFSRegWithEffect(int miscReg, const MiscReg &val, 33 ExecContext *xc) 34{ 35 int64_t time; 36 SparcSystem *sys; 37 switch (miscReg) { 38 /** Full system only ASRs */ 39 case MISCREG_SOFTINT: 40 if (isNonPriv()) 41 return new PrivilegedOpcode; 42 // Check if we are going to interrupt because of something 43 int oldLevel = InterruptLevel(softint); 44 int newLevel = InterruptLevel(val); 45 setReg(miscReg, val); 46 if (newLevel > oldLevel) 47 ; // MUST DO SOMETHING HERE TO TELL CPU TO LOOK FOR INTERRUPTS XXX 48 //xc->getCpuPtr()->checkInterrupts = true; 49 return NoFault; 50 51 case MISCREG_SOFTINT_CLR: 52 return setRegWithEffect(miscReg, ~val & softint, xc); 53 case MISCREG_SOFTINT_SET: 54 return setRegWithEffect(miscReg, val | softint, xc); 55 56 case MISCREG_TICK_CMPR: 57 if (isNonPriv()) 58 return new PrivilegedOpcode; 59 if (tickCompare == NULL) 60 tickCompare = new TickCompareEvent(this, xc); 61 setReg(miscReg, val); 62 if (tick_cmprFields.int_dis && tickCompare.scheduled()) 63 tickCompare.deschedule(); 64 time = tick_cmprFields.tick_cmpr - tickFields.counter; 65 if (!tick_cmprFields.int_dis && time > 0) 66 tickCompare.schedule(time * xc->getCpuPtr()->cycles(1)); 67 return NoFault; 68 69 case MISCREG_STICK: 70 if (isNonPriv()) 71 return new PrivilegedOpcode; 72 if (isPriv()) 73 return new PrivilegedAction; 74 sys = dynamic_cast<SparcSystem*>(xc->getSystemPtr()); 75 assert(sys != NULL); 76 sys->sysTick = curTick/Clock::Int::ns - val & ~Bit64; 77 stickFields.npt = val & Bit64 ? 1 : 0; 78 return NoFault; 79 80 case MISCREG_STICK_CMPR: 81 if (isNonPriv()) 82 return new PrivilegedOpcode; 83 if (sTickCompare == NULL) 84 sTickCompare = new STickCompareEvent(this, xc); 85 sys = dynamic_cast<SparcSystem*>(xc->getSystemPtr()); 86 assert(sys != NULL); 87 setReg(miscReg, val); 88 if (stick_cmprFields.int_dis && sTickCompare.scheduled()) 89 sTickCompare.deschedule(); 90 time = stick_cmprFields.tick_cmpr - sys->sysTick; 91 if (!stick_cmprFields.int_dis && time > 0) 92 sTickCompare.schedule(time * Clock::Int::ns); 93 return NoFault; 94 95 /** Fullsystem only Priv registers. */ 96 case MISCREG_PIL: 97 if (FULL_SYSTEM) { 98 setReg(miscReg, val); 99 //xc->getCpuPtr()->checkInterrupts; 100 // MUST DO SOMETHING HERE TO TELL CPU TO LOOK FOR INTERRUPTS XXX 101 return NoFault; 102 } else 103 panic("PIL not implemented for syscall emulation\n"); 104 105 /** Hyper privileged registers */ 106 case MISCREG_HPSTATE: 107 case MISCREG_HINTP: 108 setReg(miscReg, val); 109 return NoFault; 110 case MISCREG_HTSTATE: 111 if (tl == 0) 112 return new IllegalInstruction; 113 setReg(miscReg, val); 114 return NoFault; 115 116 case MISCREG_HTBA: 117 // clear lower 7 bits on writes. 118 setReg(miscReg, val & ULL(~0x7FFF)); 119 return NoFault; 120 121 case MISCREG_STRAND_STS_REG: 122 setReg(miscReg, strandStatusReg); 123 return NoFault; 124 case MISCREG_HSTICK_CMPR: 125 if (isNonPriv()) 126 return new PrivilegedOpcode; 127 if (hSTickCompare == NULL) 128 hSTickCompare = new HSTickCompareEvent(this, xc); 129 sys = dynamic_cast<SparcSystem*>(xc->getSystemPtr()); 130 assert(sys != NULL); 131 setReg(miscReg, val); 132 if (hstick_cmprFields.int_dis && hSTickCompare.scheduled()) 133 hSTickCompare.deschedule(); 134 int64_t time = hstick_cmprFields.tick_cmpr - sys->sysTick; 135 if (!hstick_cmprFields.int_dis && time > 0) 136 hSTickCompare.schedule(time * Clock::Int::ns); 137 return NoFault; 138 default: 139 return new IllegalInstruction; 140 } 141} 142 143MiscReg 144MiscRegFile::readFSRegWithEffect(int miscReg, Fault &fault, ExecContext * xc) 145{ 146 switch (miscReg) { 147 148 /** Privileged registers. */ 149 case MISCREG_SOFTINT: 150 if (isNonPriv()) { 151 fault = new PrivilegedOpcode; 152 return 0; 153 } 154 return readReg(miscReg); 155 case MISCREG_TICK_CMPR: 156 if (isNonPriv()) { 157 fault = new PrivilegedOpcode; 158 return 0; 159 } 160 return readReg(miscReg); 161 case MISCREG_STICK: 162 SparcSystem *sys; 163 if (stickFields.npt && !isNonPriv()) { 164 fault = new PrivilegedAction; 165 return 0; 166 } 167 sys = dynamic_cast<SparcSystem*>(xc->getSystemPtr()); 168 assert(sys != NULL); 169 return curTick/Clock::Int::ns - sys->sysTick | stickFields.npt << 63; 170 case MISCREG_STICK_CMPR: 171 if (isNonPriv()) { 172 fault = new PrivilegedOpcode; 173 return 0; 174 } 175 return readReg(miscReg); 176 177 178 /** Hyper privileged registers */ 179 case MISCREG_HPSTATE: 180 case MISCREG_HINTP: 181 return readReg(miscReg); 182 case MISCREG_HTSTATE: 183 if (tl == 0) { 184 fault = new IllegalInstruction; 185 return 0; 186 } 187 return readReg(miscReg); 188 189 case MISCREG_HTBA: 190 return readReg(miscReg) & ULL(~0x7FFF); 191 case MISCREG_HVER: 192 return NWindows | MaxTL << 8 | MaxGL << 16; 193 case MISCREG_STRAND_STS_REG: 194 return strandStatusReg; 195 case MISCREG_HSTICK_CMPR: 196 return hstick_cmpr; 197 198 default: 199 fault = new IllegalInstruction; 200 return 0; 201 } 202} 203 204void 205MiscRegFile::processTickCompare(ExecContext *xc) 206{ 207 panic("tick compare not implemented\n"); 208} 209 210void 211MiscRegFile::processSTickCompare(ExecContext *xc) 212{ 213 panic("tick compare not implemented\n"); 214} 215 216void 217MiscRegFile::processHSTickCompare(ExecContext *xc) 218{ 219 panic("tick compare not implemented\n"); 220} 221 222}; // namespace SparcISA 223