1 /* 2 * QEMU MIPS CPU 3 * 4 * Copyright (c) 2012 SUSE LINUX Products GmbH 5 * 6 * This library is free software; you can redistribute it and/or 7 * modify it under the terms of the GNU Lesser General Public 8 * License as published by the Free Software Foundation; either 9 * version 2.1 of the License, or (at your option) any later version. 10 * 11 * This library is distributed in the hope that it will be useful, 12 * but WITHOUT ANY WARRANTY; without even the implied warranty of 13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 14 * Lesser General Public License for more details. 15 * 16 * You should have received a copy of the GNU Lesser General Public 17 * License along with this library; if not, see 18 * <http://www.gnu.org/licenses/lgpl-2.1.html> 19 */ 20 21 #include "qemu/osdep.h" 22 #include "qemu/cutils.h" 23 #include "qemu/qemu-print.h" 24 #include "qapi/error.h" 25 #include "cpu.h" 26 #include "internal.h" 27 #include "kvm_mips.h" 28 #include "qemu/module.h" 29 #include "sysemu/kvm.h" 30 #include "sysemu/qtest.h" 31 #include "exec/exec-all.h" 32 #include "hw/qdev-properties.h" 33 #include "hw/qdev-clock.h" 34 #include "hw/semihosting/semihost.h" 35 #include "qapi/qapi-commands-machine-target.h" 36 #include "fpu_helper.h" 37 38 #if !defined(CONFIG_USER_ONLY) 39 40 /* Called for updates to CP0_Status. */ 41 void sync_c0_status(CPUMIPSState *env, CPUMIPSState *cpu, int tc) 42 { 43 int32_t tcstatus, *tcst; 44 uint32_t v = cpu->CP0_Status; 45 uint32_t cu, mx, asid, ksu; 46 uint32_t mask = ((1 << CP0TCSt_TCU3) 47 | (1 << CP0TCSt_TCU2) 48 | (1 << CP0TCSt_TCU1) 49 | (1 << CP0TCSt_TCU0) 50 | (1 << CP0TCSt_TMX) 51 | (3 << CP0TCSt_TKSU) 52 | (0xff << CP0TCSt_TASID)); 53 54 cu = (v >> CP0St_CU0) & 0xf; 55 mx = (v >> CP0St_MX) & 0x1; 56 ksu = (v >> CP0St_KSU) & 0x3; 57 asid = env->CP0_EntryHi & env->CP0_EntryHi_ASID_mask; 58 59 tcstatus = cu << CP0TCSt_TCU0; 60 tcstatus |= mx << CP0TCSt_TMX; 61 tcstatus |= ksu << CP0TCSt_TKSU; 62 tcstatus |= asid; 63 64 if (tc == cpu->current_tc) { 65 tcst = &cpu->active_tc.CP0_TCStatus; 66 } else { 67 tcst = &cpu->tcs[tc].CP0_TCStatus; 68 } 69 70 *tcst &= ~mask; 71 *tcst |= tcstatus; 72 compute_hflags(cpu); 73 } 74 75 void cpu_mips_store_status(CPUMIPSState *env, target_ulong val) 76 { 77 uint32_t mask = env->CP0_Status_rw_bitmask; 78 target_ulong old = env->CP0_Status; 79 80 if (env->insn_flags & ISA_MIPS_R6) { 81 bool has_supervisor = extract32(mask, CP0St_KSU, 2) == 0x3; 82 #if defined(TARGET_MIPS64) 83 uint32_t ksux = (1 << CP0St_KX) & val; 84 ksux |= (ksux >> 1) & val; /* KX = 0 forces SX to be 0 */ 85 ksux |= (ksux >> 1) & val; /* SX = 0 forces UX to be 0 */ 86 val = (val & ~(7 << CP0St_UX)) | ksux; 87 #endif 88 if (has_supervisor && extract32(val, CP0St_KSU, 2) == 0x3) { 89 mask &= ~(3 << CP0St_KSU); 90 } 91 mask &= ~(((1 << CP0St_SR) | (1 << CP0St_NMI)) & val); 92 } 93 94 env->CP0_Status = (old & ~mask) | (val & mask); 95 #if defined(TARGET_MIPS64) 96 if ((env->CP0_Status ^ old) & (old & (7 << CP0St_UX))) { 97 /* Access to at least one of the 64-bit segments has been disabled */ 98 tlb_flush(env_cpu(env)); 99 } 100 #endif 101 if (ase_mt_available(env)) { 102 sync_c0_status(env, env, env->current_tc); 103 } else { 104 compute_hflags(env); 105 } 106 } 107 108 void cpu_mips_store_cause(CPUMIPSState *env, target_ulong val) 109 { 110 uint32_t mask = 0x00C00300; 111 uint32_t old = env->CP0_Cause; 112 int i; 113 114 if (env->insn_flags & ISA_MIPS_R2) { 115 mask |= 1 << CP0Ca_DC; 116 } 117 if (env->insn_flags & ISA_MIPS_R6) { 118 mask &= ~((1 << CP0Ca_WP) & val); 119 } 120 121 env->CP0_Cause = (env->CP0_Cause & ~mask) | (val & mask); 122 123 if ((old ^ env->CP0_Cause) & (1 << CP0Ca_DC)) { 124 if (env->CP0_Cause & (1 << CP0Ca_DC)) { 125 cpu_mips_stop_count(env); 126 } else { 127 cpu_mips_start_count(env); 128 } 129 } 130 131 /* Set/reset software interrupts */ 132 for (i = 0 ; i < 2 ; i++) { 133 if ((old ^ env->CP0_Cause) & (1 << (CP0Ca_IP + i))) { 134 cpu_mips_soft_irq(env, i, env->CP0_Cause & (1 << (CP0Ca_IP + i))); 135 } 136 } 137 } 138 139 #endif /* !CONFIG_USER_ONLY */ 140 141 static const char * const excp_names[EXCP_LAST + 1] = { 142 [EXCP_RESET] = "reset", 143 [EXCP_SRESET] = "soft reset", 144 [EXCP_DSS] = "debug single step", 145 [EXCP_DINT] = "debug interrupt", 146 [EXCP_NMI] = "non-maskable interrupt", 147 [EXCP_MCHECK] = "machine check", 148 [EXCP_EXT_INTERRUPT] = "interrupt", 149 [EXCP_DFWATCH] = "deferred watchpoint", 150 [EXCP_DIB] = "debug instruction breakpoint", 151 [EXCP_IWATCH] = "instruction fetch watchpoint", 152 [EXCP_AdEL] = "address error load", 153 [EXCP_AdES] = "address error store", 154 [EXCP_TLBF] = "TLB refill", 155 [EXCP_IBE] = "instruction bus error", 156 [EXCP_DBp] = "debug breakpoint", 157 [EXCP_SYSCALL] = "syscall", 158 [EXCP_BREAK] = "break", 159 [EXCP_CpU] = "coprocessor unusable", 160 [EXCP_RI] = "reserved instruction", 161 [EXCP_OVERFLOW] = "arithmetic overflow", 162 [EXCP_TRAP] = "trap", 163 [EXCP_FPE] = "floating point", 164 [EXCP_DDBS] = "debug data break store", 165 [EXCP_DWATCH] = "data watchpoint", 166 [EXCP_LTLBL] = "TLB modify", 167 [EXCP_TLBL] = "TLB load", 168 [EXCP_TLBS] = "TLB store", 169 [EXCP_DBE] = "data bus error", 170 [EXCP_DDBL] = "debug data break load", 171 [EXCP_THREAD] = "thread", 172 [EXCP_MDMX] = "MDMX", 173 [EXCP_C2E] = "precise coprocessor 2", 174 [EXCP_CACHE] = "cache error", 175 [EXCP_TLBXI] = "TLB execute-inhibit", 176 [EXCP_TLBRI] = "TLB read-inhibit", 177 [EXCP_MSADIS] = "MSA disabled", 178 [EXCP_MSAFPE] = "MSA floating point", 179 }; 180 181 const char *mips_exception_name(int32_t exception) 182 { 183 if (exception < 0 || exception > EXCP_LAST) { 184 return "unknown"; 185 } 186 return excp_names[exception]; 187 } 188 189 void cpu_set_exception_base(int vp_index, target_ulong address) 190 { 191 MIPSCPU *vp = MIPS_CPU(qemu_get_cpu(vp_index)); 192 vp->env.exception_base = address; 193 } 194 195 target_ulong exception_resume_pc(CPUMIPSState *env) 196 { 197 target_ulong bad_pc; 198 target_ulong isa_mode; 199 200 isa_mode = !!(env->hflags & MIPS_HFLAG_M16); 201 bad_pc = env->active_tc.PC | isa_mode; 202 if (env->hflags & MIPS_HFLAG_BMASK) { 203 /* 204 * If the exception was raised from a delay slot, come back to 205 * the jump. 206 */ 207 bad_pc -= (env->hflags & MIPS_HFLAG_B16 ? 2 : 4); 208 } 209 210 return bad_pc; 211 } 212 213 bool mips_cpu_exec_interrupt(CPUState *cs, int interrupt_request) 214 { 215 if (interrupt_request & CPU_INTERRUPT_HARD) { 216 MIPSCPU *cpu = MIPS_CPU(cs); 217 CPUMIPSState *env = &cpu->env; 218 219 if (cpu_mips_hw_interrupts_enabled(env) && 220 cpu_mips_hw_interrupts_pending(env)) { 221 /* Raise it */ 222 cs->exception_index = EXCP_EXT_INTERRUPT; 223 env->error_code = 0; 224 mips_cpu_do_interrupt(cs); 225 return true; 226 } 227 } 228 return false; 229 } 230 231 void QEMU_NORETURN do_raise_exception_err(CPUMIPSState *env, 232 uint32_t exception, 233 int error_code, 234 uintptr_t pc) 235 { 236 CPUState *cs = env_cpu(env); 237 238 qemu_log_mask(CPU_LOG_INT, "%s: %d (%s) %d\n", 239 __func__, exception, mips_exception_name(exception), 240 error_code); 241 cs->exception_index = exception; 242 env->error_code = error_code; 243 244 cpu_loop_exit_restore(cs, pc); 245 } 246 247 static void mips_cpu_set_pc(CPUState *cs, vaddr value) 248 { 249 MIPSCPU *cpu = MIPS_CPU(cs); 250 CPUMIPSState *env = &cpu->env; 251 252 env->active_tc.PC = value & ~(target_ulong)1; 253 if (value & 1) { 254 env->hflags |= MIPS_HFLAG_M16; 255 } else { 256 env->hflags &= ~(MIPS_HFLAG_M16); 257 } 258 } 259 260 #ifdef CONFIG_TCG 261 static void mips_cpu_synchronize_from_tb(CPUState *cs, 262 const TranslationBlock *tb) 263 { 264 MIPSCPU *cpu = MIPS_CPU(cs); 265 CPUMIPSState *env = &cpu->env; 266 267 env->active_tc.PC = tb->pc; 268 env->hflags &= ~MIPS_HFLAG_BMASK; 269 env->hflags |= tb->flags & MIPS_HFLAG_BMASK; 270 } 271 #endif /* CONFIG_TCG */ 272 273 static bool mips_cpu_has_work(CPUState *cs) 274 { 275 MIPSCPU *cpu = MIPS_CPU(cs); 276 CPUMIPSState *env = &cpu->env; 277 bool has_work = false; 278 279 /* 280 * Prior to MIPS Release 6 it is implementation dependent if non-enabled 281 * interrupts wake-up the CPU, however most of the implementations only 282 * check for interrupts that can be taken. 283 */ 284 if ((cs->interrupt_request & CPU_INTERRUPT_HARD) && 285 cpu_mips_hw_interrupts_pending(env)) { 286 if (cpu_mips_hw_interrupts_enabled(env) || 287 (env->insn_flags & ISA_MIPS_R6)) { 288 has_work = true; 289 } 290 } 291 292 /* MIPS-MT has the ability to halt the CPU. */ 293 if (ase_mt_available(env)) { 294 /* 295 * The QEMU model will issue an _WAKE request whenever the CPUs 296 * should be woken up. 297 */ 298 if (cs->interrupt_request & CPU_INTERRUPT_WAKE) { 299 has_work = true; 300 } 301 302 if (!mips_vpe_active(env)) { 303 has_work = false; 304 } 305 } 306 /* MIPS Release 6 has the ability to halt the CPU. */ 307 if (env->CP0_Config5 & (1 << CP0C5_VP)) { 308 if (cs->interrupt_request & CPU_INTERRUPT_WAKE) { 309 has_work = true; 310 } 311 if (!mips_vp_active(env)) { 312 has_work = false; 313 } 314 } 315 return has_work; 316 } 317 318 #include "cpu-defs.c.inc" 319 320 static void mips_cpu_reset(DeviceState *dev) 321 { 322 CPUState *cs = CPU(dev); 323 MIPSCPU *cpu = MIPS_CPU(cs); 324 MIPSCPUClass *mcc = MIPS_CPU_GET_CLASS(cpu); 325 CPUMIPSState *env = &cpu->env; 326 327 mcc->parent_reset(dev); 328 329 memset(env, 0, offsetof(CPUMIPSState, end_reset_fields)); 330 331 /* Reset registers to their default values */ 332 env->CP0_PRid = env->cpu_model->CP0_PRid; 333 env->CP0_Config0 = env->cpu_model->CP0_Config0; 334 #ifdef TARGET_WORDS_BIGENDIAN 335 env->CP0_Config0 |= (1 << CP0C0_BE); 336 #endif 337 env->CP0_Config1 = env->cpu_model->CP0_Config1; 338 env->CP0_Config2 = env->cpu_model->CP0_Config2; 339 env->CP0_Config3 = env->cpu_model->CP0_Config3; 340 env->CP0_Config4 = env->cpu_model->CP0_Config4; 341 env->CP0_Config4_rw_bitmask = env->cpu_model->CP0_Config4_rw_bitmask; 342 env->CP0_Config5 = env->cpu_model->CP0_Config5; 343 env->CP0_Config5_rw_bitmask = env->cpu_model->CP0_Config5_rw_bitmask; 344 env->CP0_Config6 = env->cpu_model->CP0_Config6; 345 env->CP0_Config6_rw_bitmask = env->cpu_model->CP0_Config6_rw_bitmask; 346 env->CP0_Config7 = env->cpu_model->CP0_Config7; 347 env->CP0_Config7_rw_bitmask = env->cpu_model->CP0_Config7_rw_bitmask; 348 env->CP0_LLAddr_rw_bitmask = env->cpu_model->CP0_LLAddr_rw_bitmask 349 << env->cpu_model->CP0_LLAddr_shift; 350 env->CP0_LLAddr_shift = env->cpu_model->CP0_LLAddr_shift; 351 env->SYNCI_Step = env->cpu_model->SYNCI_Step; 352 env->CCRes = env->cpu_model->CCRes; 353 env->CP0_Status_rw_bitmask = env->cpu_model->CP0_Status_rw_bitmask; 354 env->CP0_TCStatus_rw_bitmask = env->cpu_model->CP0_TCStatus_rw_bitmask; 355 env->CP0_SRSCtl = env->cpu_model->CP0_SRSCtl; 356 env->current_tc = 0; 357 env->SEGBITS = env->cpu_model->SEGBITS; 358 env->SEGMask = (target_ulong)((1ULL << env->cpu_model->SEGBITS) - 1); 359 #if defined(TARGET_MIPS64) 360 if (env->cpu_model->insn_flags & ISA_MIPS3) { 361 env->SEGMask |= 3ULL << 62; 362 } 363 #endif 364 env->PABITS = env->cpu_model->PABITS; 365 env->CP0_SRSConf0_rw_bitmask = env->cpu_model->CP0_SRSConf0_rw_bitmask; 366 env->CP0_SRSConf0 = env->cpu_model->CP0_SRSConf0; 367 env->CP0_SRSConf1_rw_bitmask = env->cpu_model->CP0_SRSConf1_rw_bitmask; 368 env->CP0_SRSConf1 = env->cpu_model->CP0_SRSConf1; 369 env->CP0_SRSConf2_rw_bitmask = env->cpu_model->CP0_SRSConf2_rw_bitmask; 370 env->CP0_SRSConf2 = env->cpu_model->CP0_SRSConf2; 371 env->CP0_SRSConf3_rw_bitmask = env->cpu_model->CP0_SRSConf3_rw_bitmask; 372 env->CP0_SRSConf3 = env->cpu_model->CP0_SRSConf3; 373 env->CP0_SRSConf4_rw_bitmask = env->cpu_model->CP0_SRSConf4_rw_bitmask; 374 env->CP0_SRSConf4 = env->cpu_model->CP0_SRSConf4; 375 env->CP0_PageGrain_rw_bitmask = env->cpu_model->CP0_PageGrain_rw_bitmask; 376 env->CP0_PageGrain = env->cpu_model->CP0_PageGrain; 377 env->CP0_EBaseWG_rw_bitmask = env->cpu_model->CP0_EBaseWG_rw_bitmask; 378 env->active_fpu.fcr0 = env->cpu_model->CP1_fcr0; 379 env->active_fpu.fcr31_rw_bitmask = env->cpu_model->CP1_fcr31_rw_bitmask; 380 env->active_fpu.fcr31 = env->cpu_model->CP1_fcr31; 381 env->msair = env->cpu_model->MSAIR; 382 env->insn_flags = env->cpu_model->insn_flags; 383 384 #if defined(CONFIG_USER_ONLY) 385 env->CP0_Status = (MIPS_HFLAG_UM << CP0St_KSU); 386 # ifdef TARGET_MIPS64 387 /* Enable 64-bit register mode. */ 388 env->CP0_Status |= (1 << CP0St_PX); 389 # endif 390 # ifdef TARGET_ABI_MIPSN64 391 /* Enable 64-bit address mode. */ 392 env->CP0_Status |= (1 << CP0St_UX); 393 # endif 394 /* 395 * Enable access to the CPUNum, SYNCI_Step, CC, and CCRes RDHWR 396 * hardware registers. 397 */ 398 env->CP0_HWREna |= 0x0000000F; 399 if (env->CP0_Config1 & (1 << CP0C1_FP)) { 400 env->CP0_Status |= (1 << CP0St_CU1); 401 } 402 if (env->CP0_Config3 & (1 << CP0C3_DSPP)) { 403 env->CP0_Status |= (1 << CP0St_MX); 404 } 405 # if defined(TARGET_MIPS64) 406 /* For MIPS64, init FR bit to 1 if FPU unit is there and bit is writable. */ 407 if ((env->CP0_Config1 & (1 << CP0C1_FP)) && 408 (env->CP0_Status_rw_bitmask & (1 << CP0St_FR))) { 409 env->CP0_Status |= (1 << CP0St_FR); 410 } 411 # endif 412 #else /* !CONFIG_USER_ONLY */ 413 if (env->hflags & MIPS_HFLAG_BMASK) { 414 /* 415 * If the exception was raised from a delay slot, 416 * come back to the jump. 417 */ 418 env->CP0_ErrorEPC = (env->active_tc.PC 419 - (env->hflags & MIPS_HFLAG_B16 ? 2 : 4)); 420 } else { 421 env->CP0_ErrorEPC = env->active_tc.PC; 422 } 423 env->active_tc.PC = env->exception_base; 424 env->CP0_Random = env->tlb->nb_tlb - 1; 425 env->tlb->tlb_in_use = env->tlb->nb_tlb; 426 env->CP0_Wired = 0; 427 env->CP0_GlobalNumber = (cs->cpu_index & 0xFF) << CP0GN_VPId; 428 env->CP0_EBase = (cs->cpu_index & 0x3FF); 429 if (mips_um_ksegs_enabled()) { 430 env->CP0_EBase |= 0x40000000; 431 } else { 432 env->CP0_EBase |= (int32_t)0x80000000; 433 } 434 if (env->CP0_Config3 & (1 << CP0C3_CMGCR)) { 435 env->CP0_CMGCRBase = 0x1fbf8000 >> 4; 436 } 437 env->CP0_EntryHi_ASID_mask = (env->CP0_Config5 & (1 << CP0C5_MI)) ? 438 0x0 : (env->CP0_Config4 & (1 << CP0C4_AE)) ? 0x3ff : 0xff; 439 env->CP0_Status = (1 << CP0St_BEV) | (1 << CP0St_ERL); 440 /* 441 * Vectored interrupts not implemented, timer on int 7, 442 * no performance counters. 443 */ 444 env->CP0_IntCtl = 0xe0000000; 445 { 446 int i; 447 448 for (i = 0; i < 7; i++) { 449 env->CP0_WatchLo[i] = 0; 450 env->CP0_WatchHi[i] = 0x80000000; 451 } 452 env->CP0_WatchLo[7] = 0; 453 env->CP0_WatchHi[7] = 0; 454 } 455 /* Count register increments in debug mode, EJTAG version 1 */ 456 env->CP0_Debug = (1 << CP0DB_CNT) | (0x1 << CP0DB_VER); 457 458 cpu_mips_store_count(env, 1); 459 460 if (ase_mt_available(env)) { 461 int i; 462 463 /* Only TC0 on VPE 0 starts as active. */ 464 for (i = 0; i < ARRAY_SIZE(env->tcs); i++) { 465 env->tcs[i].CP0_TCBind = cs->cpu_index << CP0TCBd_CurVPE; 466 env->tcs[i].CP0_TCHalt = 1; 467 } 468 env->active_tc.CP0_TCHalt = 1; 469 cs->halted = 1; 470 471 if (cs->cpu_index == 0) { 472 /* VPE0 starts up enabled. */ 473 env->mvp->CP0_MVPControl |= (1 << CP0MVPCo_EVP); 474 env->CP0_VPEConf0 |= (1 << CP0VPEC0_MVP) | (1 << CP0VPEC0_VPA); 475 476 /* TC0 starts up unhalted. */ 477 cs->halted = 0; 478 env->active_tc.CP0_TCHalt = 0; 479 env->tcs[0].CP0_TCHalt = 0; 480 /* With thread 0 active. */ 481 env->active_tc.CP0_TCStatus = (1 << CP0TCSt_A); 482 env->tcs[0].CP0_TCStatus = (1 << CP0TCSt_A); 483 } 484 } 485 486 /* 487 * Configure default legacy segmentation control. We use this regardless of 488 * whether segmentation control is presented to the guest. 489 */ 490 /* KSeg3 (seg0 0xE0000000..0xFFFFFFFF) */ 491 env->CP0_SegCtl0 = (CP0SC_AM_MK << CP0SC_AM); 492 /* KSeg2 (seg1 0xC0000000..0xDFFFFFFF) */ 493 env->CP0_SegCtl0 |= ((CP0SC_AM_MSK << CP0SC_AM)) << 16; 494 /* KSeg1 (seg2 0xA0000000..0x9FFFFFFF) */ 495 env->CP0_SegCtl1 = (0 << CP0SC_PA) | (CP0SC_AM_UK << CP0SC_AM) | 496 (2 << CP0SC_C); 497 /* KSeg0 (seg3 0x80000000..0x9FFFFFFF) */ 498 env->CP0_SegCtl1 |= ((0 << CP0SC_PA) | (CP0SC_AM_UK << CP0SC_AM) | 499 (3 << CP0SC_C)) << 16; 500 /* USeg (seg4 0x40000000..0x7FFFFFFF) */ 501 env->CP0_SegCtl2 = (2 << CP0SC_PA) | (CP0SC_AM_MUSK << CP0SC_AM) | 502 (1 << CP0SC_EU) | (2 << CP0SC_C); 503 /* USeg (seg5 0x00000000..0x3FFFFFFF) */ 504 env->CP0_SegCtl2 |= ((0 << CP0SC_PA) | (CP0SC_AM_MUSK << CP0SC_AM) | 505 (1 << CP0SC_EU) | (2 << CP0SC_C)) << 16; 506 /* XKPhys (note, SegCtl2.XR = 0, so XAM won't be used) */ 507 env->CP0_SegCtl1 |= (CP0SC_AM_UK << CP0SC1_XAM); 508 #endif /* !CONFIG_USER_ONLY */ 509 if ((env->insn_flags & ISA_MIPS_R6) && 510 (env->active_fpu.fcr0 & (1 << FCR0_F64))) { 511 /* Status.FR = 0 mode in 64-bit FPU not allowed in R6 */ 512 env->CP0_Status |= (1 << CP0St_FR); 513 } 514 515 if (env->insn_flags & ISA_MIPS_R6) { 516 /* PTW = 1 */ 517 env->CP0_PWSize = 0x40; 518 /* GDI = 12 */ 519 /* UDI = 12 */ 520 /* MDI = 12 */ 521 /* PRI = 12 */ 522 /* PTEI = 2 */ 523 env->CP0_PWField = 0x0C30C302; 524 } else { 525 /* GDI = 0 */ 526 /* UDI = 0 */ 527 /* MDI = 0 */ 528 /* PRI = 0 */ 529 /* PTEI = 2 */ 530 env->CP0_PWField = 0x02; 531 } 532 533 if (env->CP0_Config3 & (1 << CP0C3_ISA) & (1 << (CP0C3_ISA + 1))) { 534 /* microMIPS on reset when Config3.ISA is 3 */ 535 env->hflags |= MIPS_HFLAG_M16; 536 } 537 538 msa_reset(env); 539 540 compute_hflags(env); 541 restore_fp_status(env); 542 restore_pamask(env); 543 cs->exception_index = EXCP_NONE; 544 545 if (semihosting_get_argc()) { 546 /* UHI interface can be used to obtain argc and argv */ 547 env->active_tc.gpr[4] = -1; 548 } 549 550 #ifndef CONFIG_USER_ONLY 551 if (kvm_enabled()) { 552 kvm_mips_reset_vcpu(cpu); 553 } 554 #endif 555 } 556 557 static void mips_cpu_disas_set_info(CPUState *s, disassemble_info *info) 558 { 559 MIPSCPU *cpu = MIPS_CPU(s); 560 CPUMIPSState *env = &cpu->env; 561 562 if (!(env->insn_flags & ISA_NANOMIPS32)) { 563 #ifdef TARGET_WORDS_BIGENDIAN 564 info->print_insn = print_insn_big_mips; 565 #else 566 info->print_insn = print_insn_little_mips; 567 #endif 568 } else { 569 #if defined(CONFIG_NANOMIPS_DIS) 570 info->print_insn = print_insn_nanomips; 571 #endif 572 } 573 } 574 575 /* 576 * Since commit 6af0bf9c7c3 this model assumes a CPU clocked at 200MHz. 577 */ 578 #define CPU_FREQ_HZ_DEFAULT 200000000 579 #define CP0_COUNT_RATE_DEFAULT 2 580 581 static void mips_cp0_period_set(MIPSCPU *cpu) 582 { 583 CPUMIPSState *env = &cpu->env; 584 585 env->cp0_count_ns = clock_ticks_to_ns(MIPS_CPU(cpu)->clock, 586 cpu->cp0_count_rate); 587 assert(env->cp0_count_ns); 588 } 589 590 static void mips_cpu_realizefn(DeviceState *dev, Error **errp) 591 { 592 CPUState *cs = CPU(dev); 593 MIPSCPU *cpu = MIPS_CPU(dev); 594 CPUMIPSState *env = &cpu->env; 595 MIPSCPUClass *mcc = MIPS_CPU_GET_CLASS(dev); 596 Error *local_err = NULL; 597 598 if (!clock_get(cpu->clock)) { 599 #ifndef CONFIG_USER_ONLY 600 if (!qtest_enabled()) { 601 g_autofree char *cpu_freq_str = freq_to_str(CPU_FREQ_HZ_DEFAULT); 602 603 warn_report("CPU input clock is not connected to any output clock, " 604 "using default frequency of %s.", cpu_freq_str); 605 } 606 #endif 607 /* Initialize the frequency in case the clock remains unconnected. */ 608 clock_set_hz(cpu->clock, CPU_FREQ_HZ_DEFAULT); 609 } 610 mips_cp0_period_set(cpu); 611 612 cpu_exec_realizefn(cs, &local_err); 613 if (local_err != NULL) { 614 error_propagate(errp, local_err); 615 return; 616 } 617 618 env->exception_base = (int32_t)0xBFC00000; 619 620 #ifndef CONFIG_USER_ONLY 621 mmu_init(env, env->cpu_model); 622 #endif 623 fpu_init(env, env->cpu_model); 624 mvp_init(env); 625 626 cpu_reset(cs); 627 qemu_init_vcpu(cs); 628 629 mcc->parent_realize(dev, errp); 630 } 631 632 static void mips_cpu_initfn(Object *obj) 633 { 634 MIPSCPU *cpu = MIPS_CPU(obj); 635 CPUMIPSState *env = &cpu->env; 636 MIPSCPUClass *mcc = MIPS_CPU_GET_CLASS(obj); 637 638 cpu_set_cpustate_pointers(cpu); 639 cpu->clock = qdev_init_clock_in(DEVICE(obj), "clk-in", NULL, cpu); 640 env->cpu_model = mcc->cpu_def; 641 } 642 643 static char *mips_cpu_type_name(const char *cpu_model) 644 { 645 return g_strdup_printf(MIPS_CPU_TYPE_NAME("%s"), cpu_model); 646 } 647 648 static ObjectClass *mips_cpu_class_by_name(const char *cpu_model) 649 { 650 ObjectClass *oc; 651 char *typename; 652 653 typename = mips_cpu_type_name(cpu_model); 654 oc = object_class_by_name(typename); 655 g_free(typename); 656 return oc; 657 } 658 659 static Property mips_cpu_properties[] = { 660 /* CP0 timer running at half the clock of the CPU */ 661 DEFINE_PROP_UINT32("cp0-count-rate", MIPSCPU, cp0_count_rate, 662 CP0_COUNT_RATE_DEFAULT), 663 DEFINE_PROP_END_OF_LIST() 664 }; 665 666 static void mips_cpu_class_init(ObjectClass *c, void *data) 667 { 668 MIPSCPUClass *mcc = MIPS_CPU_CLASS(c); 669 CPUClass *cc = CPU_CLASS(c); 670 DeviceClass *dc = DEVICE_CLASS(c); 671 672 device_class_set_parent_realize(dc, mips_cpu_realizefn, 673 &mcc->parent_realize); 674 device_class_set_parent_reset(dc, mips_cpu_reset, &mcc->parent_reset); 675 device_class_set_props(dc, mips_cpu_properties); 676 677 cc->class_by_name = mips_cpu_class_by_name; 678 cc->has_work = mips_cpu_has_work; 679 cc->do_interrupt = mips_cpu_do_interrupt; 680 cc->dump_state = mips_cpu_dump_state; 681 cc->set_pc = mips_cpu_set_pc; 682 cc->gdb_read_register = mips_cpu_gdb_read_register; 683 cc->gdb_write_register = mips_cpu_gdb_write_register; 684 #ifndef CONFIG_USER_ONLY 685 cc->do_transaction_failed = mips_cpu_do_transaction_failed; 686 cc->do_unaligned_access = mips_cpu_do_unaligned_access; 687 cc->get_phys_page_debug = mips_cpu_get_phys_page_debug; 688 cc->vmsd = &vmstate_mips_cpu; 689 #endif 690 cc->disas_set_info = mips_cpu_disas_set_info; 691 #ifdef CONFIG_TCG 692 cc->tcg_ops.initialize = mips_tcg_init; 693 cc->tcg_ops.cpu_exec_interrupt = mips_cpu_exec_interrupt; 694 cc->tcg_ops.synchronize_from_tb = mips_cpu_synchronize_from_tb; 695 cc->tcg_ops.tlb_fill = mips_cpu_tlb_fill; 696 #endif 697 698 cc->gdb_num_core_regs = 73; 699 cc->gdb_stop_before_watchpoint = true; 700 } 701 702 static const TypeInfo mips_cpu_type_info = { 703 .name = TYPE_MIPS_CPU, 704 .parent = TYPE_CPU, 705 .instance_size = sizeof(MIPSCPU), 706 .instance_init = mips_cpu_initfn, 707 .abstract = true, 708 .class_size = sizeof(MIPSCPUClass), 709 .class_init = mips_cpu_class_init, 710 }; 711 712 static void mips_cpu_cpudef_class_init(ObjectClass *oc, void *data) 713 { 714 MIPSCPUClass *mcc = MIPS_CPU_CLASS(oc); 715 mcc->cpu_def = data; 716 } 717 718 static void mips_register_cpudef_type(const struct mips_def_t *def) 719 { 720 char *typename = mips_cpu_type_name(def->name); 721 TypeInfo ti = { 722 .name = typename, 723 .parent = TYPE_MIPS_CPU, 724 .class_init = mips_cpu_cpudef_class_init, 725 .class_data = (void *)def, 726 }; 727 728 type_register(&ti); 729 g_free(typename); 730 } 731 732 static void mips_cpu_register_types(void) 733 { 734 int i; 735 736 type_register_static(&mips_cpu_type_info); 737 for (i = 0; i < mips_defs_number; i++) { 738 mips_register_cpudef_type(&mips_defs[i]); 739 } 740 } 741 742 type_init(mips_cpu_register_types) 743 744 static void mips_cpu_add_definition(gpointer data, gpointer user_data) 745 { 746 ObjectClass *oc = data; 747 CpuDefinitionInfoList **cpu_list = user_data; 748 CpuDefinitionInfo *info; 749 const char *typename; 750 751 typename = object_class_get_name(oc); 752 info = g_malloc0(sizeof(*info)); 753 info->name = g_strndup(typename, 754 strlen(typename) - strlen("-" TYPE_MIPS_CPU)); 755 info->q_typename = g_strdup(typename); 756 757 QAPI_LIST_PREPEND(*cpu_list, info); 758 } 759 760 CpuDefinitionInfoList *qmp_query_cpu_definitions(Error **errp) 761 { 762 CpuDefinitionInfoList *cpu_list = NULL; 763 GSList *list; 764 765 list = object_class_get_list(TYPE_MIPS_CPU, false); 766 g_slist_foreach(list, mips_cpu_add_definition, &cpu_list); 767 g_slist_free(list); 768 769 return cpu_list; 770 } 771 772 /* Could be used by generic CPU object */ 773 MIPSCPU *mips_cpu_create_with_clock(const char *cpu_type, Clock *cpu_refclk) 774 { 775 DeviceState *cpu; 776 777 cpu = DEVICE(object_new(cpu_type)); 778 qdev_connect_clock_in(cpu, "clk-in", cpu_refclk); 779 qdev_realize(cpu, NULL, &error_abort); 780 781 return MIPS_CPU(cpu); 782 } 783 784 bool cpu_supports_isa(const CPUMIPSState *env, uint64_t isa_mask) 785 { 786 return (env->cpu_model->insn_flags & isa_mask) != 0; 787 } 788 789 bool cpu_type_supports_isa(const char *cpu_type, uint64_t isa) 790 { 791 const MIPSCPUClass *mcc = MIPS_CPU_CLASS(object_class_by_name(cpu_type)); 792 return (mcc->cpu_def->insn_flags & isa) != 0; 793 } 794 795 bool cpu_type_supports_cps_smp(const char *cpu_type) 796 { 797 const MIPSCPUClass *mcc = MIPS_CPU_CLASS(object_class_by_name(cpu_type)); 798 return (mcc->cpu_def->CP0_Config3 & (1 << CP0C3_CMGCR)) != 0; 799 } 800