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 * Authors: Ali Saidi 29 */ 30 31#include "arch/sparc/regfile.hh" 32 33Fault 34SparcISA::MiscRegFile::setFSRegWithEffect(int miscReg, const MiscReg &val,
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35 ExecContext *xc)
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35 ThreadContext *tc) |
36{ 37 int64_t time; 38 SparcSystem *sys; 39 switch (miscReg) { 40 /** Full system only ASRs */ 41 case MISCREG_SOFTINT: 42 if (isNonPriv()) 43 return new PrivilegedOpcode; 44 // Check if we are going to interrupt because of something 45 int oldLevel = InterruptLevel(softint); 46 int newLevel = InterruptLevel(val); 47 setReg(miscReg, val); 48 if (newLevel > oldLevel) 49 ; // MUST DO SOMETHING HERE TO TELL CPU TO LOOK FOR INTERRUPTS XXX
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50 //xc->getCpuPtr()->checkInterrupts = true;
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50 //tc->getCpuPtr()->checkInterrupts = true; |
51 return NoFault; 52 53 case MISCREG_SOFTINT_CLR:
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54 return setRegWithEffect(miscReg, ~val & softint, xc);
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54 return setRegWithEffect(miscReg, ~val & softint, tc); |
55 case MISCREG_SOFTINT_SET:
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56 return setRegWithEffect(miscReg, val | softint, xc);
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56 return setRegWithEffect(miscReg, val | softint, tc); |
57 58 case MISCREG_TICK_CMPR: 59 if (isNonPriv()) 60 return new PrivilegedOpcode; 61 if (tickCompare == NULL)
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62 tickCompare = new TickCompareEvent(this, xc);
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62 tickCompare = new TickCompareEvent(this, tc); |
63 setReg(miscReg, val); 64 if (tick_cmprFields.int_dis && tickCompare.scheduled()) 65 tickCompare.deschedule(); 66 time = tick_cmprFields.tick_cmpr - tickFields.counter; 67 if (!tick_cmprFields.int_dis && time > 0)
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68 tickCompare.schedule(time * xc->getCpuPtr()->cycles(1));
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68 tickCompare.schedule(time * tc->getCpuPtr()->cycles(1)); |
69 return NoFault; 70 71 case MISCREG_STICK: 72 if (isNonPriv()) 73 return new PrivilegedOpcode; 74 if (isPriv()) 75 return new PrivilegedAction;
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76 sys = dynamic_cast<SparcSystem*>(xc->getSystemPtr());
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76 sys = dynamic_cast<SparcSystem*>(tc->getSystemPtr()); |
77 assert(sys != NULL); 78 sys->sysTick = curTick/Clock::Int::ns - val & ~Bit64; 79 stickFields.npt = val & Bit64 ? 1 : 0; 80 return NoFault; 81 82 case MISCREG_STICK_CMPR: 83 if (isNonPriv()) 84 return new PrivilegedOpcode; 85 if (sTickCompare == NULL)
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86 sTickCompare = new STickCompareEvent(this, xc);
87 sys = dynamic_cast<SparcSystem*>(xc->getSystemPtr());
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86 sTickCompare = new STickCompareEvent(this, tc); 87 sys = dynamic_cast<SparcSystem*>(tc->getSystemPtr()); |
88 assert(sys != NULL); 89 setReg(miscReg, val); 90 if (stick_cmprFields.int_dis && sTickCompare.scheduled()) 91 sTickCompare.deschedule(); 92 time = stick_cmprFields.tick_cmpr - sys->sysTick; 93 if (!stick_cmprFields.int_dis && time > 0) 94 sTickCompare.schedule(time * Clock::Int::ns); 95 return NoFault; 96 97 /** Fullsystem only Priv registers. */ 98 case MISCREG_PIL: 99 if (FULL_SYSTEM) { 100 setReg(miscReg, val);
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101 //xc->getCpuPtr()->checkInterrupts;
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101 //tc->getCpuPtr()->checkInterrupts; |
102 // MUST DO SOMETHING HERE TO TELL CPU TO LOOK FOR INTERRUPTS XXX 103 return NoFault; 104 } else 105 panic("PIL not implemented for syscall emulation\n"); 106 107 /** Hyper privileged registers */ 108 case MISCREG_HPSTATE: 109 case MISCREG_HINTP: 110 setReg(miscReg, val); 111 return NoFault; 112 case MISCREG_HTSTATE: 113 if (tl == 0) 114 return new IllegalInstruction; 115 setReg(miscReg, val); 116 return NoFault; 117 118 case MISCREG_HTBA: 119 // clear lower 7 bits on writes. 120 setReg(miscReg, val & ULL(~0x7FFF)); 121 return NoFault; 122 123 case MISCREG_STRAND_STS_REG: 124 setReg(miscReg, strandStatusReg); 125 return NoFault; 126 case MISCREG_HSTICK_CMPR: 127 if (isNonPriv()) 128 return new PrivilegedOpcode; 129 if (hSTickCompare == NULL)
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130 hSTickCompare = new HSTickCompareEvent(this, xc);
131 sys = dynamic_cast<SparcSystem*>(xc->getSystemPtr());
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130 hSTickCompare = new HSTickCompareEvent(this, tc); 131 sys = dynamic_cast<SparcSystem*>(tc->getSystemPtr()); |
132 assert(sys != NULL); 133 setReg(miscReg, val); 134 if (hstick_cmprFields.int_dis && hSTickCompare.scheduled()) 135 hSTickCompare.deschedule(); 136 int64_t time = hstick_cmprFields.tick_cmpr - sys->sysTick; 137 if (!hstick_cmprFields.int_dis && time > 0) 138 hSTickCompare.schedule(time * Clock::Int::ns); 139 return NoFault; 140 default: 141 return new IllegalInstruction; 142 } 143} 144 145MiscReg
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146MiscRegFile::readFSRegWithEffect(int miscReg, Fault &fault, ExecContext * xc)
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146MiscRegFile::readFSRegWithEffect(int miscReg, Fault &fault, ThreadContext * tc) |
147{ 148 switch (miscReg) { 149 150 /** Privileged registers. */ 151 case MISCREG_SOFTINT: 152 if (isNonPriv()) { 153 fault = new PrivilegedOpcode; 154 return 0; 155 } 156 return readReg(miscReg); 157 case MISCREG_TICK_CMPR: 158 if (isNonPriv()) { 159 fault = new PrivilegedOpcode; 160 return 0; 161 } 162 return readReg(miscReg); 163 case MISCREG_STICK: 164 SparcSystem *sys; 165 if (stickFields.npt && !isNonPriv()) { 166 fault = new PrivilegedAction; 167 return 0; 168 }
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169 sys = dynamic_cast<SparcSystem*>(xc->getSystemPtr());
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169 sys = dynamic_cast<SparcSystem*>(tc->getSystemPtr()); |
170 assert(sys != NULL); 171 return curTick/Clock::Int::ns - sys->sysTick | stickFields.npt << 63; 172 case MISCREG_STICK_CMPR: 173 if (isNonPriv()) { 174 fault = new PrivilegedOpcode; 175 return 0; 176 } 177 return readReg(miscReg); 178 179 180 /** Hyper privileged registers */ 181 case MISCREG_HPSTATE: 182 case MISCREG_HINTP: 183 return readReg(miscReg); 184 case MISCREG_HTSTATE: 185 if (tl == 0) { 186 fault = new IllegalInstruction; 187 return 0; 188 } 189 return readReg(miscReg); 190 191 case MISCREG_HTBA: 192 return readReg(miscReg) & ULL(~0x7FFF); 193 case MISCREG_HVER: 194 return NWindows | MaxTL << 8 | MaxGL << 16; 195 case MISCREG_STRAND_STS_REG: 196 return strandStatusReg; 197 case MISCREG_HSTICK_CMPR: 198 return hstick_cmpr; 199 200 default: 201 fault = new IllegalInstruction; 202 return 0; 203 } 204} 205 206void
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207MiscRegFile::processTickCompare(ExecContext *xc)
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207MiscRegFile::processTickCompare(ThreadContext *tc) |
208{ 209 panic("tick compare not implemented\n"); 210} 211 212void
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213MiscRegFile::processSTickCompare(ExecContext *xc)
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213MiscRegFile::processSTickCompare(ThreadContext *tc) |
214{ 215 panic("tick compare not implemented\n"); 216} 217 218void
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219MiscRegFile::processHSTickCompare(ExecContext *xc)
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219MiscRegFile::processHSTickCompare(ThreadContext *tc) |
220{ 221 panic("tick compare not implemented\n"); 222} 223 224}; // namespace SparcISA
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