ua2005.cc revision 4194
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/kernel_stats.hh" 30#include "arch/sparc/miscregfile.hh" 31#include "base/bitfield.hh" 32#include "base/trace.hh" 33#include "cpu/base.hh" 34#include "cpu/thread_context.hh" 35#include "sim/system.hh" 36 37using namespace SparcISA; 38 39 40void 41MiscRegFile::checkSoftInt(ThreadContext *tc) 42{ 43 // If PIL < 14, copy over the tm and sm bits 44 if (pil < 14 && softint & 0x10000) 45 tc->getCpuPtr()->post_interrupt(IT_SOFT_INT,16); 46 else 47 tc->getCpuPtr()->clear_interrupt(IT_SOFT_INT,16); 48 if (pil < 14 && softint & 0x1) 49 tc->getCpuPtr()->post_interrupt(IT_SOFT_INT,0); 50 else 51 tc->getCpuPtr()->clear_interrupt(IT_SOFT_INT,0); 52 53 // Copy over any of the other bits that are set 54 for (int bit = 15; bit > 0; --bit) { 55 if (1 << bit & softint && bit > pil) 56 tc->getCpuPtr()->post_interrupt(IT_SOFT_INT,bit); 57 else 58 tc->getCpuPtr()->clear_interrupt(IT_SOFT_INT,bit); 59 } 60} 61 62 63void 64MiscRegFile::setFSReg(int miscReg, const MiscReg &val, ThreadContext *tc) 65{ 66 int64_t time; 67 switch (miscReg) { 68 /* Full system only ASRs */ 69 case MISCREG_SOFTINT: 70 setRegNoEffect(miscReg, val);; 71 checkSoftInt(tc); 72 break; 73 case MISCREG_SOFTINT_CLR: 74 return setReg(MISCREG_SOFTINT, ~val & softint, tc); 75 case MISCREG_SOFTINT_SET: 76 return setReg(MISCREG_SOFTINT, val | softint, tc); 77 78 case MISCREG_TICK_CMPR: 79 if (tickCompare == NULL) 80 tickCompare = new TickCompareEvent(this, tc); 81 setRegNoEffect(miscReg, val); 82 if ((tick_cmpr & ~mask(63)) && tickCompare->scheduled()) 83 tickCompare->deschedule(); 84 time = (tick_cmpr & mask(63)) - (tick & mask(63)); 85 if (!(tick_cmpr & ~mask(63)) && time > 0) { 86 if (tickCompare->scheduled()) 87 tickCompare->deschedule(); 88 tickCompare->schedule(time * tc->getCpuPtr()->cycles(1)); 89 } 90 panic("writing to TICK compare register %#X\n", val); 91 break; 92 93 case MISCREG_STICK_CMPR: 94 if (sTickCompare == NULL) 95 sTickCompare = new STickCompareEvent(this, tc); 96 setRegNoEffect(miscReg, val); 97 if ((stick_cmpr & ~mask(63)) && sTickCompare->scheduled()) 98 sTickCompare->deschedule(); 99 time = ((int64_t)(stick_cmpr & mask(63)) - (int64_t)stick) - 100 tc->getCpuPtr()->instCount(); 101 if (!(stick_cmpr & ~mask(63)) && time > 0) { 102 if (sTickCompare->scheduled()) 103 sTickCompare->deschedule(); 104 sTickCompare->schedule(time * tc->getCpuPtr()->cycles(1) + curTick); 105 } 106 DPRINTF(Timer, "writing to sTICK compare register value %#X\n", val); 107 break; 108 109 case MISCREG_PSTATE: 110 setRegNoEffect(miscReg, val); 111 112 case MISCREG_PIL: 113 setRegNoEffect(miscReg, val); 114 checkSoftInt(tc); 115 break; 116 117 case MISCREG_HVER: 118 panic("Shouldn't be writing HVER\n"); 119 120 case MISCREG_HINTP: 121 setRegNoEffect(miscReg, val); 122 if (hintp) 123 tc->getCpuPtr()->post_interrupt(IT_HINTP,0); 124 else 125 tc->getCpuPtr()->clear_interrupt(IT_HINTP,0); 126 break; 127 128 case MISCREG_HTBA: 129 // clear lower 7 bits on writes. 130 setRegNoEffect(miscReg, val & ULL(~0x7FFF)); 131 break; 132 133 case MISCREG_QUEUE_CPU_MONDO_HEAD: 134 case MISCREG_QUEUE_CPU_MONDO_TAIL: 135 setRegNoEffect(miscReg, val); 136 if (cpu_mondo_head != cpu_mondo_tail) 137 tc->getCpuPtr()->post_interrupt(IT_CPU_MONDO,0); 138 else 139 tc->getCpuPtr()->clear_interrupt(IT_CPU_MONDO,0); 140 break; 141 case MISCREG_QUEUE_DEV_MONDO_HEAD: 142 case MISCREG_QUEUE_DEV_MONDO_TAIL: 143 setRegNoEffect(miscReg, val); 144 if (dev_mondo_head != dev_mondo_tail) 145 tc->getCpuPtr()->post_interrupt(IT_DEV_MONDO,0); 146 else 147 tc->getCpuPtr()->clear_interrupt(IT_DEV_MONDO,0); 148 break; 149 case MISCREG_QUEUE_RES_ERROR_HEAD: 150 case MISCREG_QUEUE_RES_ERROR_TAIL: 151 setRegNoEffect(miscReg, val); 152 if (res_error_head != res_error_tail) 153 tc->getCpuPtr()->post_interrupt(IT_RES_ERROR,0); 154 else 155 tc->getCpuPtr()->clear_interrupt(IT_RES_ERROR,0); 156 break; 157 case MISCREG_QUEUE_NRES_ERROR_HEAD: 158 case MISCREG_QUEUE_NRES_ERROR_TAIL: 159 setRegNoEffect(miscReg, val); 160 // This one doesn't have an interrupt to report to the guest OS 161 break; 162 163 case MISCREG_HSTICK_CMPR: 164 if (hSTickCompare == NULL) 165 hSTickCompare = new HSTickCompareEvent(this, tc); 166 setRegNoEffect(miscReg, val); 167 if ((hstick_cmpr & ~mask(63)) && hSTickCompare->scheduled()) 168 hSTickCompare->deschedule(); 169 time = ((int64_t)(hstick_cmpr & mask(63)) - (int64_t)stick) - 170 tc->getCpuPtr()->instCount(); 171 if (!(hstick_cmpr & ~mask(63)) && time > 0) { 172 if (hSTickCompare->scheduled()) 173 hSTickCompare->deschedule(); 174 hSTickCompare->schedule(curTick + time * tc->getCpuPtr()->cycles(1)); 175 } 176 DPRINTF(Timer, "writing to hsTICK compare register value %#X\n", val); 177 break; 178 179 case MISCREG_HPSTATE: 180 // T1000 spec says impl. dependent val must always be 1 181 setRegNoEffect(miscReg, val | HPSTATE::id); 182#if FULL_SYSTEM 183 if (hpstate & HPSTATE::tlz && tl == 0 && !(hpstate & HPSTATE::hpriv)) 184 tc->getCpuPtr()->post_interrupt(IT_TRAP_LEVEL_ZERO,0); 185 else 186 tc->getCpuPtr()->clear_interrupt(IT_TRAP_LEVEL_ZERO,0); 187#endif 188 break; 189 case MISCREG_HTSTATE: 190 setRegNoEffect(miscReg, val); 191 break; 192 193 case MISCREG_STRAND_STS_REG: 194 if (bits(val,2,2)) 195 panic("No support for setting spec_en bit\n"); 196 setRegNoEffect(miscReg, bits(val,0,0)); 197 if (!bits(val,0,0)) { 198 // Time to go to sleep 199 tc->suspend(); 200 if (tc->getKernelStats()) 201 tc->getKernelStats()->quiesce(); 202 } 203 break; 204 205 default: 206 panic("Invalid write to FS misc register %s\n", getMiscRegName(miscReg)); 207 } 208} 209 210MiscReg 211MiscRegFile::readFSReg(int miscReg, ThreadContext * tc) 212{ 213 uint64_t temp; 214 215 switch (miscReg) { 216 /* Privileged registers. */ 217 case MISCREG_QUEUE_CPU_MONDO_HEAD: 218 case MISCREG_QUEUE_CPU_MONDO_TAIL: 219 case MISCREG_QUEUE_DEV_MONDO_HEAD: 220 case MISCREG_QUEUE_DEV_MONDO_TAIL: 221 case MISCREG_QUEUE_RES_ERROR_HEAD: 222 case MISCREG_QUEUE_RES_ERROR_TAIL: 223 case MISCREG_QUEUE_NRES_ERROR_HEAD: 224 case MISCREG_QUEUE_NRES_ERROR_TAIL: 225 case MISCREG_SOFTINT: 226 case MISCREG_TICK_CMPR: 227 case MISCREG_STICK_CMPR: 228 case MISCREG_PIL: 229 case MISCREG_HPSTATE: 230 case MISCREG_HINTP: 231 case MISCREG_HTSTATE: 232 case MISCREG_HSTICK_CMPR: 233 return readRegNoEffect(miscReg) ; 234 235 case MISCREG_HTBA: 236 return readRegNoEffect(miscReg) & ULL(~0x7FFF); 237 case MISCREG_HVER: 238 return NWindows | MaxTL << 8 | MaxGL << 16; 239 240 case MISCREG_STRAND_STS_REG: 241 System *sys; 242 int x; 243 sys = tc->getSystemPtr(); 244 245 temp = readRegNoEffect(miscReg) & (STS::active | STS::speculative); 246 // Check that the CPU array is fully populated (by calling getNumCPus()) 247 assert(sys->getNumCPUs() > tc->readCpuId()); 248 249 temp |= tc->readCpuId() << STS::shft_id; 250 251 for (x = tc->readCpuId() & ~3; x < sys->threadContexts.size(); x++) { 252 switch (sys->threadContexts[x]->status()) { 253 case ThreadContext::Active: 254 temp |= STS::st_run << (STS::shft_fsm0 - 255 ((x & 0x3) * (STS::shft_fsm0-STS::shft_fsm1))); 256 break; 257 case ThreadContext::Suspended: 258 // should this be idle? 259 temp |= STS::st_idle << (STS::shft_fsm0 - 260 ((x & 0x3) * (STS::shft_fsm0-STS::shft_fsm1))); 261 break; 262 case ThreadContext::Halted: 263 temp |= STS::st_halt << (STS::shft_fsm0 - 264 ((x & 0x3) * (STS::shft_fsm0-STS::shft_fsm1))); 265 break; 266 default: 267 panic("What state are we in?!\n"); 268 } // switch 269 } // for 270 271 return temp; 272 default: 273 panic("Invalid read to FS misc register\n"); 274 } 275} 276/* 277 In Niagra STICK==TICK so this isn't needed 278 case MISCREG_STICK: 279 SparcSystem *sys; 280 sys = dynamic_cast<SparcSystem*>(tc->getSystemPtr()); 281 assert(sys != NULL); 282 return curTick/Clock::Int::ns - sys->sysTick | (stick & ~(mask(63))); 283*/ 284 285 286 287void 288MiscRegFile::processTickCompare(ThreadContext *tc) 289{ 290 panic("tick compare not implemented\n"); 291} 292 293void 294MiscRegFile::processSTickCompare(ThreadContext *tc) 295{ 296 // since our microcode instructions take two cycles we need to check if 297 // we're actually at the correct cycle or we need to wait a little while 298 // more 299 int ticks; 300 ticks = ((int64_t)(stick_cmpr & mask(63)) - (int64_t)stick) - 301 tc->getCpuPtr()->instCount(); 302 assert(ticks >= 0 && "stick compare missed interrupt cycle"); 303 304 if (ticks == 0) { 305 DPRINTF(Timer, "STick compare cycle reached at %#x\n", 306 (stick_cmpr & mask(63))); 307 if (!(tc->readMiscRegNoEffect(MISCREG_STICK_CMPR) & (ULL(1) << 63))) { 308 setReg(MISCREG_SOFTINT, softint | (ULL(1) << 16), tc); 309 } 310 } else 311 sTickCompare->schedule(ticks * tc->getCpuPtr()->cycles(1) + curTick); 312} 313 314void 315MiscRegFile::processHSTickCompare(ThreadContext *tc) 316{ 317 // since our microcode instructions take two cycles we need to check if 318 // we're actually at the correct cycle or we need to wait a little while 319 // more 320 int ticks; 321 ticks = ((int64_t)(hstick_cmpr & mask(63)) - (int64_t)stick) - 322 tc->getCpuPtr()->instCount(); 323 assert(ticks >= 0 && "hstick compare missed interrupt cycle"); 324 325 if (ticks == 0) { 326 DPRINTF(Timer, "HSTick compare cycle reached at %#x\n", 327 (stick_cmpr & mask(63))); 328 if (!(tc->readMiscRegNoEffect(MISCREG_HSTICK_CMPR) & (ULL(1) << 63))) { 329 setReg(MISCREG_HINTP, 1, tc); 330 } 331 // Need to do something to cause interrupt to happen here !!! @todo 332 } else 333 hSTickCompare->schedule(ticks * tc->getCpuPtr()->cycles(1) + curTick); 334} 335 336