1 /* 2 * ARM virtual CPU header 3 * 4 * Copyright (c) 2003 Fabrice Bellard 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 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 <http://www.gnu.org/licenses/>. 18 */ 19 20 #ifndef ARM_CPU_H 21 #define ARM_CPU_H 22 23 #include "kvm-consts.h" 24 #include "hw/registerfields.h" 25 26 #if defined(TARGET_AARCH64) 27 /* AArch64 definitions */ 28 # define TARGET_LONG_BITS 64 29 #else 30 # define TARGET_LONG_BITS 32 31 #endif 32 33 /* ARM processors have a weak memory model */ 34 #define TCG_GUEST_DEFAULT_MO (0) 35 36 #define CPUArchState struct CPUARMState 37 38 #include "qemu-common.h" 39 #include "cpu-qom.h" 40 #include "exec/cpu-defs.h" 41 42 #define EXCP_UDEF 1 /* undefined instruction */ 43 #define EXCP_SWI 2 /* software interrupt */ 44 #define EXCP_PREFETCH_ABORT 3 45 #define EXCP_DATA_ABORT 4 46 #define EXCP_IRQ 5 47 #define EXCP_FIQ 6 48 #define EXCP_BKPT 7 49 #define EXCP_EXCEPTION_EXIT 8 /* Return from v7M exception. */ 50 #define EXCP_KERNEL_TRAP 9 /* Jumped to kernel code page. */ 51 #define EXCP_HVC 11 /* HyperVisor Call */ 52 #define EXCP_HYP_TRAP 12 53 #define EXCP_SMC 13 /* Secure Monitor Call */ 54 #define EXCP_VIRQ 14 55 #define EXCP_VFIQ 15 56 #define EXCP_SEMIHOST 16 /* semihosting call */ 57 #define EXCP_NOCP 17 /* v7M NOCP UsageFault */ 58 #define EXCP_INVSTATE 18 /* v7M INVSTATE UsageFault */ 59 #define EXCP_STKOF 19 /* v8M STKOF UsageFault */ 60 /* NB: add new EXCP_ defines to the array in arm_log_exception() too */ 61 62 #define ARMV7M_EXCP_RESET 1 63 #define ARMV7M_EXCP_NMI 2 64 #define ARMV7M_EXCP_HARD 3 65 #define ARMV7M_EXCP_MEM 4 66 #define ARMV7M_EXCP_BUS 5 67 #define ARMV7M_EXCP_USAGE 6 68 #define ARMV7M_EXCP_SECURE 7 69 #define ARMV7M_EXCP_SVC 11 70 #define ARMV7M_EXCP_DEBUG 12 71 #define ARMV7M_EXCP_PENDSV 14 72 #define ARMV7M_EXCP_SYSTICK 15 73 74 /* For M profile, some registers are banked secure vs non-secure; 75 * these are represented as a 2-element array where the first element 76 * is the non-secure copy and the second is the secure copy. 77 * When the CPU does not have implement the security extension then 78 * only the first element is used. 79 * This means that the copy for the current security state can be 80 * accessed via env->registerfield[env->v7m.secure] (whether the security 81 * extension is implemented or not). 82 */ 83 enum { 84 M_REG_NS = 0, 85 M_REG_S = 1, 86 M_REG_NUM_BANKS = 2, 87 }; 88 89 /* ARM-specific interrupt pending bits. */ 90 #define CPU_INTERRUPT_FIQ CPU_INTERRUPT_TGT_EXT_1 91 #define CPU_INTERRUPT_VIRQ CPU_INTERRUPT_TGT_EXT_2 92 #define CPU_INTERRUPT_VFIQ CPU_INTERRUPT_TGT_EXT_3 93 94 /* The usual mapping for an AArch64 system register to its AArch32 95 * counterpart is for the 32 bit world to have access to the lower 96 * half only (with writes leaving the upper half untouched). It's 97 * therefore useful to be able to pass TCG the offset of the least 98 * significant half of a uint64_t struct member. 99 */ 100 #ifdef HOST_WORDS_BIGENDIAN 101 #define offsetoflow32(S, M) (offsetof(S, M) + sizeof(uint32_t)) 102 #define offsetofhigh32(S, M) offsetof(S, M) 103 #else 104 #define offsetoflow32(S, M) offsetof(S, M) 105 #define offsetofhigh32(S, M) (offsetof(S, M) + sizeof(uint32_t)) 106 #endif 107 108 /* Meanings of the ARMCPU object's four inbound GPIO lines */ 109 #define ARM_CPU_IRQ 0 110 #define ARM_CPU_FIQ 1 111 #define ARM_CPU_VIRQ 2 112 #define ARM_CPU_VFIQ 3 113 114 #define NB_MMU_MODES 8 115 /* ARM-specific extra insn start words: 116 * 1: Conditional execution bits 117 * 2: Partial exception syndrome for data aborts 118 */ 119 #define TARGET_INSN_START_EXTRA_WORDS 2 120 121 /* The 2nd extra word holding syndrome info for data aborts does not use 122 * the upper 6 bits nor the lower 14 bits. We mask and shift it down to 123 * help the sleb128 encoder do a better job. 124 * When restoring the CPU state, we shift it back up. 125 */ 126 #define ARM_INSN_START_WORD2_MASK ((1 << 26) - 1) 127 #define ARM_INSN_START_WORD2_SHIFT 14 128 129 /* We currently assume float and double are IEEE single and double 130 precision respectively. 131 Doing runtime conversions is tricky because VFP registers may contain 132 integer values (eg. as the result of a FTOSI instruction). 133 s<2n> maps to the least significant half of d<n> 134 s<2n+1> maps to the most significant half of d<n> 135 */ 136 137 /** 138 * DynamicGDBXMLInfo: 139 * @desc: Contains the XML descriptions. 140 * @num_cpregs: Number of the Coprocessor registers seen by GDB. 141 * @cpregs_keys: Array that contains the corresponding Key of 142 * a given cpreg with the same order of the cpreg in the XML description. 143 */ 144 typedef struct DynamicGDBXMLInfo { 145 char *desc; 146 int num_cpregs; 147 uint32_t *cpregs_keys; 148 } DynamicGDBXMLInfo; 149 150 /* CPU state for each instance of a generic timer (in cp15 c14) */ 151 typedef struct ARMGenericTimer { 152 uint64_t cval; /* Timer CompareValue register */ 153 uint64_t ctl; /* Timer Control register */ 154 } ARMGenericTimer; 155 156 #define GTIMER_PHYS 0 157 #define GTIMER_VIRT 1 158 #define GTIMER_HYP 2 159 #define GTIMER_SEC 3 160 #define NUM_GTIMERS 4 161 162 typedef struct { 163 uint64_t raw_tcr; 164 uint32_t mask; 165 uint32_t base_mask; 166 } TCR; 167 168 /* Define a maximum sized vector register. 169 * For 32-bit, this is a 128-bit NEON/AdvSIMD register. 170 * For 64-bit, this is a 2048-bit SVE register. 171 * 172 * Note that the mapping between S, D, and Q views of the register bank 173 * differs between AArch64 and AArch32. 174 * In AArch32: 175 * Qn = regs[n].d[1]:regs[n].d[0] 176 * Dn = regs[n / 2].d[n & 1] 177 * Sn = regs[n / 4].d[n % 4 / 2], 178 * bits 31..0 for even n, and bits 63..32 for odd n 179 * (and regs[16] to regs[31] are inaccessible) 180 * In AArch64: 181 * Zn = regs[n].d[*] 182 * Qn = regs[n].d[1]:regs[n].d[0] 183 * Dn = regs[n].d[0] 184 * Sn = regs[n].d[0] bits 31..0 185 * Hn = regs[n].d[0] bits 15..0 186 * 187 * This corresponds to the architecturally defined mapping between 188 * the two execution states, and means we do not need to explicitly 189 * map these registers when changing states. 190 * 191 * Align the data for use with TCG host vector operations. 192 */ 193 194 #ifdef TARGET_AARCH64 195 # define ARM_MAX_VQ 16 196 #else 197 # define ARM_MAX_VQ 1 198 #endif 199 200 typedef struct ARMVectorReg { 201 uint64_t d[2 * ARM_MAX_VQ] QEMU_ALIGNED(16); 202 } ARMVectorReg; 203 204 #ifdef TARGET_AARCH64 205 /* In AArch32 mode, predicate registers do not exist at all. */ 206 typedef struct ARMPredicateReg { 207 uint64_t p[2 * ARM_MAX_VQ / 8] QEMU_ALIGNED(16); 208 } ARMPredicateReg; 209 210 /* In AArch32 mode, PAC keys do not exist at all. */ 211 typedef struct ARMPACKey { 212 uint64_t lo, hi; 213 } ARMPACKey; 214 #endif 215 216 217 typedef struct CPUARMState { 218 /* Regs for current mode. */ 219 uint32_t regs[16]; 220 221 /* 32/64 switch only happens when taking and returning from 222 * exceptions so the overlap semantics are taken care of then 223 * instead of having a complicated union. 224 */ 225 /* Regs for A64 mode. */ 226 uint64_t xregs[32]; 227 uint64_t pc; 228 /* PSTATE isn't an architectural register for ARMv8. However, it is 229 * convenient for us to assemble the underlying state into a 32 bit format 230 * identical to the architectural format used for the SPSR. (This is also 231 * what the Linux kernel's 'pstate' field in signal handlers and KVM's 232 * 'pstate' register are.) Of the PSTATE bits: 233 * NZCV are kept in the split out env->CF/VF/NF/ZF, (which have the same 234 * semantics as for AArch32, as described in the comments on each field) 235 * nRW (also known as M[4]) is kept, inverted, in env->aarch64 236 * DAIF (exception masks) are kept in env->daif 237 * BTYPE is kept in env->btype 238 * all other bits are stored in their correct places in env->pstate 239 */ 240 uint32_t pstate; 241 uint32_t aarch64; /* 1 if CPU is in aarch64 state; inverse of PSTATE.nRW */ 242 243 /* Frequently accessed CPSR bits are stored separately for efficiency. 244 This contains all the other bits. Use cpsr_{read,write} to access 245 the whole CPSR. */ 246 uint32_t uncached_cpsr; 247 uint32_t spsr; 248 249 /* Banked registers. */ 250 uint64_t banked_spsr[8]; 251 uint32_t banked_r13[8]; 252 uint32_t banked_r14[8]; 253 254 /* These hold r8-r12. */ 255 uint32_t usr_regs[5]; 256 uint32_t fiq_regs[5]; 257 258 /* cpsr flag cache for faster execution */ 259 uint32_t CF; /* 0 or 1 */ 260 uint32_t VF; /* V is the bit 31. All other bits are undefined */ 261 uint32_t NF; /* N is bit 31. All other bits are undefined. */ 262 uint32_t ZF; /* Z set if zero. */ 263 uint32_t QF; /* 0 or 1 */ 264 uint32_t GE; /* cpsr[19:16] */ 265 uint32_t thumb; /* cpsr[5]. 0 = arm mode, 1 = thumb mode. */ 266 uint32_t condexec_bits; /* IT bits. cpsr[15:10,26:25]. */ 267 uint32_t btype; /* BTI branch type. spsr[11:10]. */ 268 uint64_t daif; /* exception masks, in the bits they are in PSTATE */ 269 270 uint64_t elr_el[4]; /* AArch64 exception link regs */ 271 uint64_t sp_el[4]; /* AArch64 banked stack pointers */ 272 273 /* System control coprocessor (cp15) */ 274 struct { 275 uint32_t c0_cpuid; 276 union { /* Cache size selection */ 277 struct { 278 uint64_t _unused_csselr0; 279 uint64_t csselr_ns; 280 uint64_t _unused_csselr1; 281 uint64_t csselr_s; 282 }; 283 uint64_t csselr_el[4]; 284 }; 285 union { /* System control register. */ 286 struct { 287 uint64_t _unused_sctlr; 288 uint64_t sctlr_ns; 289 uint64_t hsctlr; 290 uint64_t sctlr_s; 291 }; 292 uint64_t sctlr_el[4]; 293 }; 294 uint64_t cpacr_el1; /* Architectural feature access control register */ 295 uint64_t cptr_el[4]; /* ARMv8 feature trap registers */ 296 uint32_t c1_xscaleauxcr; /* XScale auxiliary control register. */ 297 uint64_t sder; /* Secure debug enable register. */ 298 uint32_t nsacr; /* Non-secure access control register. */ 299 union { /* MMU translation table base 0. */ 300 struct { 301 uint64_t _unused_ttbr0_0; 302 uint64_t ttbr0_ns; 303 uint64_t _unused_ttbr0_1; 304 uint64_t ttbr0_s; 305 }; 306 uint64_t ttbr0_el[4]; 307 }; 308 union { /* MMU translation table base 1. */ 309 struct { 310 uint64_t _unused_ttbr1_0; 311 uint64_t ttbr1_ns; 312 uint64_t _unused_ttbr1_1; 313 uint64_t ttbr1_s; 314 }; 315 uint64_t ttbr1_el[4]; 316 }; 317 uint64_t vttbr_el2; /* Virtualization Translation Table Base. */ 318 /* MMU translation table base control. */ 319 TCR tcr_el[4]; 320 TCR vtcr_el2; /* Virtualization Translation Control. */ 321 uint32_t c2_data; /* MPU data cacheable bits. */ 322 uint32_t c2_insn; /* MPU instruction cacheable bits. */ 323 union { /* MMU domain access control register 324 * MPU write buffer control. 325 */ 326 struct { 327 uint64_t dacr_ns; 328 uint64_t dacr_s; 329 }; 330 struct { 331 uint64_t dacr32_el2; 332 }; 333 }; 334 uint32_t pmsav5_data_ap; /* PMSAv5 MPU data access permissions */ 335 uint32_t pmsav5_insn_ap; /* PMSAv5 MPU insn access permissions */ 336 uint64_t hcr_el2; /* Hypervisor configuration register */ 337 uint64_t scr_el3; /* Secure configuration register. */ 338 union { /* Fault status registers. */ 339 struct { 340 uint64_t ifsr_ns; 341 uint64_t ifsr_s; 342 }; 343 struct { 344 uint64_t ifsr32_el2; 345 }; 346 }; 347 union { 348 struct { 349 uint64_t _unused_dfsr; 350 uint64_t dfsr_ns; 351 uint64_t hsr; 352 uint64_t dfsr_s; 353 }; 354 uint64_t esr_el[4]; 355 }; 356 uint32_t c6_region[8]; /* MPU base/size registers. */ 357 union { /* Fault address registers. */ 358 struct { 359 uint64_t _unused_far0; 360 #ifdef HOST_WORDS_BIGENDIAN 361 uint32_t ifar_ns; 362 uint32_t dfar_ns; 363 uint32_t ifar_s; 364 uint32_t dfar_s; 365 #else 366 uint32_t dfar_ns; 367 uint32_t ifar_ns; 368 uint32_t dfar_s; 369 uint32_t ifar_s; 370 #endif 371 uint64_t _unused_far3; 372 }; 373 uint64_t far_el[4]; 374 }; 375 uint64_t hpfar_el2; 376 uint64_t hstr_el2; 377 union { /* Translation result. */ 378 struct { 379 uint64_t _unused_par_0; 380 uint64_t par_ns; 381 uint64_t _unused_par_1; 382 uint64_t par_s; 383 }; 384 uint64_t par_el[4]; 385 }; 386 387 uint32_t c9_insn; /* Cache lockdown registers. */ 388 uint32_t c9_data; 389 uint64_t c9_pmcr; /* performance monitor control register */ 390 uint64_t c9_pmcnten; /* perf monitor counter enables */ 391 uint64_t c9_pmovsr; /* perf monitor overflow status */ 392 uint64_t c9_pmuserenr; /* perf monitor user enable */ 393 uint64_t c9_pmselr; /* perf monitor counter selection register */ 394 uint64_t c9_pminten; /* perf monitor interrupt enables */ 395 union { /* Memory attribute redirection */ 396 struct { 397 #ifdef HOST_WORDS_BIGENDIAN 398 uint64_t _unused_mair_0; 399 uint32_t mair1_ns; 400 uint32_t mair0_ns; 401 uint64_t _unused_mair_1; 402 uint32_t mair1_s; 403 uint32_t mair0_s; 404 #else 405 uint64_t _unused_mair_0; 406 uint32_t mair0_ns; 407 uint32_t mair1_ns; 408 uint64_t _unused_mair_1; 409 uint32_t mair0_s; 410 uint32_t mair1_s; 411 #endif 412 }; 413 uint64_t mair_el[4]; 414 }; 415 union { /* vector base address register */ 416 struct { 417 uint64_t _unused_vbar; 418 uint64_t vbar_ns; 419 uint64_t hvbar; 420 uint64_t vbar_s; 421 }; 422 uint64_t vbar_el[4]; 423 }; 424 uint32_t mvbar; /* (monitor) vector base address register */ 425 struct { /* FCSE PID. */ 426 uint32_t fcseidr_ns; 427 uint32_t fcseidr_s; 428 }; 429 union { /* Context ID. */ 430 struct { 431 uint64_t _unused_contextidr_0; 432 uint64_t contextidr_ns; 433 uint64_t _unused_contextidr_1; 434 uint64_t contextidr_s; 435 }; 436 uint64_t contextidr_el[4]; 437 }; 438 union { /* User RW Thread register. */ 439 struct { 440 uint64_t tpidrurw_ns; 441 uint64_t tpidrprw_ns; 442 uint64_t htpidr; 443 uint64_t _tpidr_el3; 444 }; 445 uint64_t tpidr_el[4]; 446 }; 447 /* The secure banks of these registers don't map anywhere */ 448 uint64_t tpidrurw_s; 449 uint64_t tpidrprw_s; 450 uint64_t tpidruro_s; 451 452 union { /* User RO Thread register. */ 453 uint64_t tpidruro_ns; 454 uint64_t tpidrro_el[1]; 455 }; 456 uint64_t c14_cntfrq; /* Counter Frequency register */ 457 uint64_t c14_cntkctl; /* Timer Control register */ 458 uint32_t cnthctl_el2; /* Counter/Timer Hyp Control register */ 459 uint64_t cntvoff_el2; /* Counter Virtual Offset register */ 460 ARMGenericTimer c14_timer[NUM_GTIMERS]; 461 uint32_t c15_cpar; /* XScale Coprocessor Access Register */ 462 uint32_t c15_ticonfig; /* TI925T configuration byte. */ 463 uint32_t c15_i_max; /* Maximum D-cache dirty line index. */ 464 uint32_t c15_i_min; /* Minimum D-cache dirty line index. */ 465 uint32_t c15_threadid; /* TI debugger thread-ID. */ 466 uint32_t c15_config_base_address; /* SCU base address. */ 467 uint32_t c15_diagnostic; /* diagnostic register */ 468 uint32_t c15_power_diagnostic; 469 uint32_t c15_power_control; /* power control */ 470 uint64_t dbgbvr[16]; /* breakpoint value registers */ 471 uint64_t dbgbcr[16]; /* breakpoint control registers */ 472 uint64_t dbgwvr[16]; /* watchpoint value registers */ 473 uint64_t dbgwcr[16]; /* watchpoint control registers */ 474 uint64_t mdscr_el1; 475 uint64_t oslsr_el1; /* OS Lock Status */ 476 uint64_t mdcr_el2; 477 uint64_t mdcr_el3; 478 /* Stores the architectural value of the counter *the last time it was 479 * updated* by pmccntr_op_start. Accesses should always be surrounded 480 * by pmccntr_op_start/pmccntr_op_finish to guarantee the latest 481 * architecturally-correct value is being read/set. 482 */ 483 uint64_t c15_ccnt; 484 /* Stores the delta between the architectural value and the underlying 485 * cycle count during normal operation. It is used to update c15_ccnt 486 * to be the correct architectural value before accesses. During 487 * accesses, c15_ccnt_delta contains the underlying count being used 488 * for the access, after which it reverts to the delta value in 489 * pmccntr_op_finish. 490 */ 491 uint64_t c15_ccnt_delta; 492 uint64_t c14_pmevcntr[31]; 493 uint64_t c14_pmevcntr_delta[31]; 494 uint64_t c14_pmevtyper[31]; 495 uint64_t pmccfiltr_el0; /* Performance Monitor Filter Register */ 496 uint64_t vpidr_el2; /* Virtualization Processor ID Register */ 497 uint64_t vmpidr_el2; /* Virtualization Multiprocessor ID Register */ 498 } cp15; 499 500 struct { 501 /* M profile has up to 4 stack pointers: 502 * a Main Stack Pointer and a Process Stack Pointer for each 503 * of the Secure and Non-Secure states. (If the CPU doesn't support 504 * the security extension then it has only two SPs.) 505 * In QEMU we always store the currently active SP in regs[13], 506 * and the non-active SP for the current security state in 507 * v7m.other_sp. The stack pointers for the inactive security state 508 * are stored in other_ss_msp and other_ss_psp. 509 * switch_v7m_security_state() is responsible for rearranging them 510 * when we change security state. 511 */ 512 uint32_t other_sp; 513 uint32_t other_ss_msp; 514 uint32_t other_ss_psp; 515 uint32_t vecbase[M_REG_NUM_BANKS]; 516 uint32_t basepri[M_REG_NUM_BANKS]; 517 uint32_t control[M_REG_NUM_BANKS]; 518 uint32_t ccr[M_REG_NUM_BANKS]; /* Configuration and Control */ 519 uint32_t cfsr[M_REG_NUM_BANKS]; /* Configurable Fault Status */ 520 uint32_t hfsr; /* HardFault Status */ 521 uint32_t dfsr; /* Debug Fault Status Register */ 522 uint32_t sfsr; /* Secure Fault Status Register */ 523 uint32_t mmfar[M_REG_NUM_BANKS]; /* MemManage Fault Address */ 524 uint32_t bfar; /* BusFault Address */ 525 uint32_t sfar; /* Secure Fault Address Register */ 526 unsigned mpu_ctrl[M_REG_NUM_BANKS]; /* MPU_CTRL */ 527 int exception; 528 uint32_t primask[M_REG_NUM_BANKS]; 529 uint32_t faultmask[M_REG_NUM_BANKS]; 530 uint32_t aircr; /* only holds r/w state if security extn implemented */ 531 uint32_t secure; /* Is CPU in Secure state? (not guest visible) */ 532 uint32_t csselr[M_REG_NUM_BANKS]; 533 uint32_t scr[M_REG_NUM_BANKS]; 534 uint32_t msplim[M_REG_NUM_BANKS]; 535 uint32_t psplim[M_REG_NUM_BANKS]; 536 } v7m; 537 538 /* Information associated with an exception about to be taken: 539 * code which raises an exception must set cs->exception_index and 540 * the relevant parts of this structure; the cpu_do_interrupt function 541 * will then set the guest-visible registers as part of the exception 542 * entry process. 543 */ 544 struct { 545 uint32_t syndrome; /* AArch64 format syndrome register */ 546 uint32_t fsr; /* AArch32 format fault status register info */ 547 uint64_t vaddress; /* virtual addr associated with exception, if any */ 548 uint32_t target_el; /* EL the exception should be targeted for */ 549 /* If we implement EL2 we will also need to store information 550 * about the intermediate physical address for stage 2 faults. 551 */ 552 } exception; 553 554 /* Information associated with an SError */ 555 struct { 556 uint8_t pending; 557 uint8_t has_esr; 558 uint64_t esr; 559 } serror; 560 561 /* State of our input IRQ/FIQ/VIRQ/VFIQ lines */ 562 uint32_t irq_line_state; 563 564 /* Thumb-2 EE state. */ 565 uint32_t teecr; 566 uint32_t teehbr; 567 568 /* VFP coprocessor state. */ 569 struct { 570 ARMVectorReg zregs[32]; 571 572 #ifdef TARGET_AARCH64 573 /* Store FFR as pregs[16] to make it easier to treat as any other. */ 574 #define FFR_PRED_NUM 16 575 ARMPredicateReg pregs[17]; 576 /* Scratch space for aa64 sve predicate temporary. */ 577 ARMPredicateReg preg_tmp; 578 #endif 579 580 /* We store these fpcsr fields separately for convenience. */ 581 uint32_t qc[4] QEMU_ALIGNED(16); 582 int vec_len; 583 int vec_stride; 584 585 uint32_t xregs[16]; 586 587 /* Scratch space for aa32 neon expansion. */ 588 uint32_t scratch[8]; 589 590 /* There are a number of distinct float control structures: 591 * 592 * fp_status: is the "normal" fp status. 593 * fp_status_fp16: used for half-precision calculations 594 * standard_fp_status : the ARM "Standard FPSCR Value" 595 * 596 * Half-precision operations are governed by a separate 597 * flush-to-zero control bit in FPSCR:FZ16. We pass a separate 598 * status structure to control this. 599 * 600 * The "Standard FPSCR", ie default-NaN, flush-to-zero, 601 * round-to-nearest and is used by any operations (generally 602 * Neon) which the architecture defines as controlled by the 603 * standard FPSCR value rather than the FPSCR. 604 * 605 * To avoid having to transfer exception bits around, we simply 606 * say that the FPSCR cumulative exception flags are the logical 607 * OR of the flags in the three fp statuses. This relies on the 608 * only thing which needs to read the exception flags being 609 * an explicit FPSCR read. 610 */ 611 float_status fp_status; 612 float_status fp_status_f16; 613 float_status standard_fp_status; 614 615 /* ZCR_EL[1-3] */ 616 uint64_t zcr_el[4]; 617 } vfp; 618 uint64_t exclusive_addr; 619 uint64_t exclusive_val; 620 uint64_t exclusive_high; 621 622 /* iwMMXt coprocessor state. */ 623 struct { 624 uint64_t regs[16]; 625 uint64_t val; 626 627 uint32_t cregs[16]; 628 } iwmmxt; 629 630 #ifdef TARGET_AARCH64 631 ARMPACKey apia_key; 632 ARMPACKey apib_key; 633 ARMPACKey apda_key; 634 ARMPACKey apdb_key; 635 ARMPACKey apga_key; 636 #endif 637 638 #if defined(CONFIG_USER_ONLY) 639 /* For usermode syscall translation. */ 640 int eabi; 641 #endif 642 643 struct CPUBreakpoint *cpu_breakpoint[16]; 644 struct CPUWatchpoint *cpu_watchpoint[16]; 645 646 /* Fields up to this point are cleared by a CPU reset */ 647 struct {} end_reset_fields; 648 649 CPU_COMMON 650 651 /* Fields after CPU_COMMON are preserved across CPU reset. */ 652 653 /* Internal CPU feature flags. */ 654 uint64_t features; 655 656 /* PMSAv7 MPU */ 657 struct { 658 uint32_t *drbar; 659 uint32_t *drsr; 660 uint32_t *dracr; 661 uint32_t rnr[M_REG_NUM_BANKS]; 662 } pmsav7; 663 664 /* PMSAv8 MPU */ 665 struct { 666 /* The PMSAv8 implementation also shares some PMSAv7 config 667 * and state: 668 * pmsav7.rnr (region number register) 669 * pmsav7_dregion (number of configured regions) 670 */ 671 uint32_t *rbar[M_REG_NUM_BANKS]; 672 uint32_t *rlar[M_REG_NUM_BANKS]; 673 uint32_t mair0[M_REG_NUM_BANKS]; 674 uint32_t mair1[M_REG_NUM_BANKS]; 675 } pmsav8; 676 677 /* v8M SAU */ 678 struct { 679 uint32_t *rbar; 680 uint32_t *rlar; 681 uint32_t rnr; 682 uint32_t ctrl; 683 } sau; 684 685 void *nvic; 686 const struct arm_boot_info *boot_info; 687 /* Store GICv3CPUState to access from this struct */ 688 void *gicv3state; 689 } CPUARMState; 690 691 /** 692 * ARMELChangeHookFn: 693 * type of a function which can be registered via arm_register_el_change_hook() 694 * to get callbacks when the CPU changes its exception level or mode. 695 */ 696 typedef void ARMELChangeHookFn(ARMCPU *cpu, void *opaque); 697 typedef struct ARMELChangeHook ARMELChangeHook; 698 struct ARMELChangeHook { 699 ARMELChangeHookFn *hook; 700 void *opaque; 701 QLIST_ENTRY(ARMELChangeHook) node; 702 }; 703 704 /* These values map onto the return values for 705 * QEMU_PSCI_0_2_FN_AFFINITY_INFO */ 706 typedef enum ARMPSCIState { 707 PSCI_ON = 0, 708 PSCI_OFF = 1, 709 PSCI_ON_PENDING = 2 710 } ARMPSCIState; 711 712 typedef struct ARMISARegisters ARMISARegisters; 713 714 /** 715 * ARMCPU: 716 * @env: #CPUARMState 717 * 718 * An ARM CPU core. 719 */ 720 struct ARMCPU { 721 /*< private >*/ 722 CPUState parent_obj; 723 /*< public >*/ 724 725 CPUARMState env; 726 727 /* Coprocessor information */ 728 GHashTable *cp_regs; 729 /* For marshalling (mostly coprocessor) register state between the 730 * kernel and QEMU (for KVM) and between two QEMUs (for migration), 731 * we use these arrays. 732 */ 733 /* List of register indexes managed via these arrays; (full KVM style 734 * 64 bit indexes, not CPRegInfo 32 bit indexes) 735 */ 736 uint64_t *cpreg_indexes; 737 /* Values of the registers (cpreg_indexes[i]'s value is cpreg_values[i]) */ 738 uint64_t *cpreg_values; 739 /* Length of the indexes, values, reset_values arrays */ 740 int32_t cpreg_array_len; 741 /* These are used only for migration: incoming data arrives in 742 * these fields and is sanity checked in post_load before copying 743 * to the working data structures above. 744 */ 745 uint64_t *cpreg_vmstate_indexes; 746 uint64_t *cpreg_vmstate_values; 747 int32_t cpreg_vmstate_array_len; 748 749 DynamicGDBXMLInfo dyn_xml; 750 751 /* Timers used by the generic (architected) timer */ 752 QEMUTimer *gt_timer[NUM_GTIMERS]; 753 /* 754 * Timer used by the PMU. Its state is restored after migration by 755 * pmu_op_finish() - it does not need other handling during migration 756 */ 757 QEMUTimer *pmu_timer; 758 /* GPIO outputs for generic timer */ 759 qemu_irq gt_timer_outputs[NUM_GTIMERS]; 760 /* GPIO output for GICv3 maintenance interrupt signal */ 761 qemu_irq gicv3_maintenance_interrupt; 762 /* GPIO output for the PMU interrupt */ 763 qemu_irq pmu_interrupt; 764 765 /* MemoryRegion to use for secure physical accesses */ 766 MemoryRegion *secure_memory; 767 768 /* For v8M, pointer to the IDAU interface provided by board/SoC */ 769 Object *idau; 770 771 /* 'compatible' string for this CPU for Linux device trees */ 772 const char *dtb_compatible; 773 774 /* PSCI version for this CPU 775 * Bits[31:16] = Major Version 776 * Bits[15:0] = Minor Version 777 */ 778 uint32_t psci_version; 779 780 /* Should CPU start in PSCI powered-off state? */ 781 bool start_powered_off; 782 783 /* Current power state, access guarded by BQL */ 784 ARMPSCIState power_state; 785 786 /* CPU has virtualization extension */ 787 bool has_el2; 788 /* CPU has security extension */ 789 bool has_el3; 790 /* CPU has PMU (Performance Monitor Unit) */ 791 bool has_pmu; 792 793 /* CPU has memory protection unit */ 794 bool has_mpu; 795 /* PMSAv7 MPU number of supported regions */ 796 uint32_t pmsav7_dregion; 797 /* v8M SAU number of supported regions */ 798 uint32_t sau_sregion; 799 800 /* PSCI conduit used to invoke PSCI methods 801 * 0 - disabled, 1 - smc, 2 - hvc 802 */ 803 uint32_t psci_conduit; 804 805 /* For v8M, initial value of the Secure VTOR */ 806 uint32_t init_svtor; 807 808 /* [QEMU_]KVM_ARM_TARGET_* constant for this CPU, or 809 * QEMU_KVM_ARM_TARGET_NONE if the kernel doesn't support this CPU type. 810 */ 811 uint32_t kvm_target; 812 813 /* KVM init features for this CPU */ 814 uint32_t kvm_init_features[7]; 815 816 /* Uniprocessor system with MP extensions */ 817 bool mp_is_up; 818 819 /* True if we tried kvm_arm_host_cpu_features() during CPU instance_init 820 * and the probe failed (so we need to report the error in realize) 821 */ 822 bool host_cpu_probe_failed; 823 824 /* Specify the number of cores in this CPU cluster. Used for the L2CTLR 825 * register. 826 */ 827 int32_t core_count; 828 829 /* The instance init functions for implementation-specific subclasses 830 * set these fields to specify the implementation-dependent values of 831 * various constant registers and reset values of non-constant 832 * registers. 833 * Some of these might become QOM properties eventually. 834 * Field names match the official register names as defined in the 835 * ARMv7AR ARM Architecture Reference Manual. A reset_ prefix 836 * is used for reset values of non-constant registers; no reset_ 837 * prefix means a constant register. 838 * Some of these registers are split out into a substructure that 839 * is shared with the translators to control the ISA. 840 */ 841 struct ARMISARegisters { 842 uint32_t id_isar0; 843 uint32_t id_isar1; 844 uint32_t id_isar2; 845 uint32_t id_isar3; 846 uint32_t id_isar4; 847 uint32_t id_isar5; 848 uint32_t id_isar6; 849 uint32_t mvfr0; 850 uint32_t mvfr1; 851 uint32_t mvfr2; 852 uint64_t id_aa64isar0; 853 uint64_t id_aa64isar1; 854 uint64_t id_aa64pfr0; 855 uint64_t id_aa64pfr1; 856 uint64_t id_aa64mmfr0; 857 uint64_t id_aa64mmfr1; 858 } isar; 859 uint32_t midr; 860 uint32_t revidr; 861 uint32_t reset_fpsid; 862 uint32_t ctr; 863 uint32_t reset_sctlr; 864 uint32_t id_pfr0; 865 uint32_t id_pfr1; 866 uint32_t id_dfr0; 867 uint64_t pmceid0; 868 uint64_t pmceid1; 869 uint32_t id_afr0; 870 uint32_t id_mmfr0; 871 uint32_t id_mmfr1; 872 uint32_t id_mmfr2; 873 uint32_t id_mmfr3; 874 uint32_t id_mmfr4; 875 uint64_t id_aa64dfr0; 876 uint64_t id_aa64dfr1; 877 uint64_t id_aa64afr0; 878 uint64_t id_aa64afr1; 879 uint32_t dbgdidr; 880 uint32_t clidr; 881 uint64_t mp_affinity; /* MP ID without feature bits */ 882 /* The elements of this array are the CCSIDR values for each cache, 883 * in the order L1DCache, L1ICache, L2DCache, L2ICache, etc. 884 */ 885 uint32_t ccsidr[16]; 886 uint64_t reset_cbar; 887 uint32_t reset_auxcr; 888 bool reset_hivecs; 889 /* DCZ blocksize, in log_2(words), ie low 4 bits of DCZID_EL0 */ 890 uint32_t dcz_blocksize; 891 uint64_t rvbar; 892 893 /* Configurable aspects of GIC cpu interface (which is part of the CPU) */ 894 int gic_num_lrs; /* number of list registers */ 895 int gic_vpribits; /* number of virtual priority bits */ 896 int gic_vprebits; /* number of virtual preemption bits */ 897 898 /* Whether the cfgend input is high (i.e. this CPU should reset into 899 * big-endian mode). This setting isn't used directly: instead it modifies 900 * the reset_sctlr value to have SCTLR_B or SCTLR_EE set, depending on the 901 * architecture version. 902 */ 903 bool cfgend; 904 905 QLIST_HEAD(, ARMELChangeHook) pre_el_change_hooks; 906 QLIST_HEAD(, ARMELChangeHook) el_change_hooks; 907 908 int32_t node_id; /* NUMA node this CPU belongs to */ 909 910 /* Used to synchronize KVM and QEMU in-kernel device levels */ 911 uint8_t device_irq_level; 912 913 /* Used to set the maximum vector length the cpu will support. */ 914 uint32_t sve_max_vq; 915 }; 916 917 static inline ARMCPU *arm_env_get_cpu(CPUARMState *env) 918 { 919 return container_of(env, ARMCPU, env); 920 } 921 922 void arm_cpu_post_init(Object *obj); 923 924 uint64_t arm_cpu_mp_affinity(int idx, uint8_t clustersz); 925 926 #define ENV_GET_CPU(e) CPU(arm_env_get_cpu(e)) 927 928 #define ENV_OFFSET offsetof(ARMCPU, env) 929 930 #ifndef CONFIG_USER_ONLY 931 extern const struct VMStateDescription vmstate_arm_cpu; 932 #endif 933 934 void arm_cpu_do_interrupt(CPUState *cpu); 935 void arm_v7m_cpu_do_interrupt(CPUState *cpu); 936 bool arm_cpu_exec_interrupt(CPUState *cpu, int int_req); 937 938 void arm_cpu_dump_state(CPUState *cs, FILE *f, fprintf_function cpu_fprintf, 939 int flags); 940 941 hwaddr arm_cpu_get_phys_page_attrs_debug(CPUState *cpu, vaddr addr, 942 MemTxAttrs *attrs); 943 944 int arm_cpu_gdb_read_register(CPUState *cpu, uint8_t *buf, int reg); 945 int arm_cpu_gdb_write_register(CPUState *cpu, uint8_t *buf, int reg); 946 947 /* Dynamically generates for gdb stub an XML description of the sysregs from 948 * the cp_regs hashtable. Returns the registered sysregs number. 949 */ 950 int arm_gen_dynamic_xml(CPUState *cpu); 951 952 /* Returns the dynamically generated XML for the gdb stub. 953 * Returns a pointer to the XML contents for the specified XML file or NULL 954 * if the XML name doesn't match the predefined one. 955 */ 956 const char *arm_gdb_get_dynamic_xml(CPUState *cpu, const char *xmlname); 957 958 int arm_cpu_write_elf64_note(WriteCoreDumpFunction f, CPUState *cs, 959 int cpuid, void *opaque); 960 int arm_cpu_write_elf32_note(WriteCoreDumpFunction f, CPUState *cs, 961 int cpuid, void *opaque); 962 963 #ifdef TARGET_AARCH64 964 int aarch64_cpu_gdb_read_register(CPUState *cpu, uint8_t *buf, int reg); 965 int aarch64_cpu_gdb_write_register(CPUState *cpu, uint8_t *buf, int reg); 966 void aarch64_sve_narrow_vq(CPUARMState *env, unsigned vq); 967 void aarch64_sve_change_el(CPUARMState *env, int old_el, 968 int new_el, bool el0_a64); 969 #else 970 static inline void aarch64_sve_narrow_vq(CPUARMState *env, unsigned vq) { } 971 static inline void aarch64_sve_change_el(CPUARMState *env, int o, 972 int n, bool a) 973 { } 974 #endif 975 976 target_ulong do_arm_semihosting(CPUARMState *env); 977 void aarch64_sync_32_to_64(CPUARMState *env); 978 void aarch64_sync_64_to_32(CPUARMState *env); 979 980 int fp_exception_el(CPUARMState *env, int cur_el); 981 int sve_exception_el(CPUARMState *env, int cur_el); 982 uint32_t sve_zcr_len_for_el(CPUARMState *env, int el); 983 984 static inline bool is_a64(CPUARMState *env) 985 { 986 return env->aarch64; 987 } 988 989 /* you can call this signal handler from your SIGBUS and SIGSEGV 990 signal handlers to inform the virtual CPU of exceptions. non zero 991 is returned if the signal was handled by the virtual CPU. */ 992 int cpu_arm_signal_handler(int host_signum, void *pinfo, 993 void *puc); 994 995 /** 996 * pmu_op_start/finish 997 * @env: CPUARMState 998 * 999 * Convert all PMU counters between their delta form (the typical mode when 1000 * they are enabled) and the guest-visible values. These two calls must 1001 * surround any action which might affect the counters. 1002 */ 1003 void pmu_op_start(CPUARMState *env); 1004 void pmu_op_finish(CPUARMState *env); 1005 1006 /* 1007 * Called when a PMU counter is due to overflow 1008 */ 1009 void arm_pmu_timer_cb(void *opaque); 1010 1011 /** 1012 * Functions to register as EL change hooks for PMU mode filtering 1013 */ 1014 void pmu_pre_el_change(ARMCPU *cpu, void *ignored); 1015 void pmu_post_el_change(ARMCPU *cpu, void *ignored); 1016 1017 /* 1018 * pmu_init 1019 * @cpu: ARMCPU 1020 * 1021 * Initialize the CPU's PMCEID[01]_EL0 registers and associated internal state 1022 * for the current configuration 1023 */ 1024 void pmu_init(ARMCPU *cpu); 1025 1026 /* SCTLR bit meanings. Several bits have been reused in newer 1027 * versions of the architecture; in that case we define constants 1028 * for both old and new bit meanings. Code which tests against those 1029 * bits should probably check or otherwise arrange that the CPU 1030 * is the architectural version it expects. 1031 */ 1032 #define SCTLR_M (1U << 0) 1033 #define SCTLR_A (1U << 1) 1034 #define SCTLR_C (1U << 2) 1035 #define SCTLR_W (1U << 3) /* up to v6; RAO in v7 */ 1036 #define SCTLR_nTLSMD_32 (1U << 3) /* v8.2-LSMAOC, AArch32 only */ 1037 #define SCTLR_SA (1U << 3) /* AArch64 only */ 1038 #define SCTLR_P (1U << 4) /* up to v5; RAO in v6 and v7 */ 1039 #define SCTLR_LSMAOE_32 (1U << 4) /* v8.2-LSMAOC, AArch32 only */ 1040 #define SCTLR_SA0 (1U << 4) /* v8 onward, AArch64 only */ 1041 #define SCTLR_D (1U << 5) /* up to v5; RAO in v6 */ 1042 #define SCTLR_CP15BEN (1U << 5) /* v7 onward */ 1043 #define SCTLR_L (1U << 6) /* up to v5; RAO in v6 and v7; RAZ in v8 */ 1044 #define SCTLR_nAA (1U << 6) /* when v8.4-LSE is implemented */ 1045 #define SCTLR_B (1U << 7) /* up to v6; RAZ in v7 */ 1046 #define SCTLR_ITD (1U << 7) /* v8 onward */ 1047 #define SCTLR_S (1U << 8) /* up to v6; RAZ in v7 */ 1048 #define SCTLR_SED (1U << 8) /* v8 onward */ 1049 #define SCTLR_R (1U << 9) /* up to v6; RAZ in v7 */ 1050 #define SCTLR_UMA (1U << 9) /* v8 onward, AArch64 only */ 1051 #define SCTLR_F (1U << 10) /* up to v6 */ 1052 #define SCTLR_SW (1U << 10) /* v7 */ 1053 #define SCTLR_EnRCTX (1U << 10) /* in v8.0-PredInv */ 1054 #define SCTLR_Z (1U << 11) /* in v7, RES1 in v8 */ 1055 #define SCTLR_EOS (1U << 11) /* v8.5-ExS */ 1056 #define SCTLR_I (1U << 12) 1057 #define SCTLR_V (1U << 13) /* AArch32 only */ 1058 #define SCTLR_EnDB (1U << 13) /* v8.3, AArch64 only */ 1059 #define SCTLR_RR (1U << 14) /* up to v7 */ 1060 #define SCTLR_DZE (1U << 14) /* v8 onward, AArch64 only */ 1061 #define SCTLR_L4 (1U << 15) /* up to v6; RAZ in v7 */ 1062 #define SCTLR_UCT (1U << 15) /* v8 onward, AArch64 only */ 1063 #define SCTLR_DT (1U << 16) /* up to ??, RAO in v6 and v7 */ 1064 #define SCTLR_nTWI (1U << 16) /* v8 onward */ 1065 #define SCTLR_HA (1U << 17) /* up to v7, RES0 in v8 */ 1066 #define SCTLR_BR (1U << 17) /* PMSA only */ 1067 #define SCTLR_IT (1U << 18) /* up to ??, RAO in v6 and v7 */ 1068 #define SCTLR_nTWE (1U << 18) /* v8 onward */ 1069 #define SCTLR_WXN (1U << 19) 1070 #define SCTLR_ST (1U << 20) /* up to ??, RAZ in v6 */ 1071 #define SCTLR_UWXN (1U << 20) /* v7 onward, AArch32 only */ 1072 #define SCTLR_FI (1U << 21) /* up to v7, v8 RES0 */ 1073 #define SCTLR_IESB (1U << 21) /* v8.2-IESB, AArch64 only */ 1074 #define SCTLR_U (1U << 22) /* up to v6, RAO in v7 */ 1075 #define SCTLR_EIS (1U << 22) /* v8.5-ExS */ 1076 #define SCTLR_XP (1U << 23) /* up to v6; v7 onward RAO */ 1077 #define SCTLR_SPAN (1U << 23) /* v8.1-PAN */ 1078 #define SCTLR_VE (1U << 24) /* up to v7 */ 1079 #define SCTLR_E0E (1U << 24) /* v8 onward, AArch64 only */ 1080 #define SCTLR_EE (1U << 25) 1081 #define SCTLR_L2 (1U << 26) /* up to v6, RAZ in v7 */ 1082 #define SCTLR_UCI (1U << 26) /* v8 onward, AArch64 only */ 1083 #define SCTLR_NMFI (1U << 27) /* up to v7, RAZ in v7VE and v8 */ 1084 #define SCTLR_EnDA (1U << 27) /* v8.3, AArch64 only */ 1085 #define SCTLR_TRE (1U << 28) /* AArch32 only */ 1086 #define SCTLR_nTLSMD_64 (1U << 28) /* v8.2-LSMAOC, AArch64 only */ 1087 #define SCTLR_AFE (1U << 29) /* AArch32 only */ 1088 #define SCTLR_LSMAOE_64 (1U << 29) /* v8.2-LSMAOC, AArch64 only */ 1089 #define SCTLR_TE (1U << 30) /* AArch32 only */ 1090 #define SCTLR_EnIB (1U << 30) /* v8.3, AArch64 only */ 1091 #define SCTLR_EnIA (1U << 31) /* v8.3, AArch64 only */ 1092 #define SCTLR_BT0 (1ULL << 35) /* v8.5-BTI */ 1093 #define SCTLR_BT1 (1ULL << 36) /* v8.5-BTI */ 1094 #define SCTLR_ITFSB (1ULL << 37) /* v8.5-MemTag */ 1095 #define SCTLR_TCF0 (3ULL << 38) /* v8.5-MemTag */ 1096 #define SCTLR_TCF (3ULL << 40) /* v8.5-MemTag */ 1097 #define SCTLR_ATA0 (1ULL << 42) /* v8.5-MemTag */ 1098 #define SCTLR_ATA (1ULL << 43) /* v8.5-MemTag */ 1099 #define SCTLR_DSSBS (1ULL << 44) /* v8.5 */ 1100 1101 #define CPTR_TCPAC (1U << 31) 1102 #define CPTR_TTA (1U << 20) 1103 #define CPTR_TFP (1U << 10) 1104 #define CPTR_TZ (1U << 8) /* CPTR_EL2 */ 1105 #define CPTR_EZ (1U << 8) /* CPTR_EL3 */ 1106 1107 #define MDCR_EPMAD (1U << 21) 1108 #define MDCR_EDAD (1U << 20) 1109 #define MDCR_SPME (1U << 17) /* MDCR_EL3 */ 1110 #define MDCR_HPMD (1U << 17) /* MDCR_EL2 */ 1111 #define MDCR_SDD (1U << 16) 1112 #define MDCR_SPD (3U << 14) 1113 #define MDCR_TDRA (1U << 11) 1114 #define MDCR_TDOSA (1U << 10) 1115 #define MDCR_TDA (1U << 9) 1116 #define MDCR_TDE (1U << 8) 1117 #define MDCR_HPME (1U << 7) 1118 #define MDCR_TPM (1U << 6) 1119 #define MDCR_TPMCR (1U << 5) 1120 #define MDCR_HPMN (0x1fU) 1121 1122 /* Not all of the MDCR_EL3 bits are present in the 32-bit SDCR */ 1123 #define SDCR_VALID_MASK (MDCR_EPMAD | MDCR_EDAD | MDCR_SPME | MDCR_SPD) 1124 1125 #define CPSR_M (0x1fU) 1126 #define CPSR_T (1U << 5) 1127 #define CPSR_F (1U << 6) 1128 #define CPSR_I (1U << 7) 1129 #define CPSR_A (1U << 8) 1130 #define CPSR_E (1U << 9) 1131 #define CPSR_IT_2_7 (0xfc00U) 1132 #define CPSR_GE (0xfU << 16) 1133 #define CPSR_IL (1U << 20) 1134 /* Note that the RESERVED bits include bit 21, which is PSTATE_SS in 1135 * an AArch64 SPSR but RES0 in AArch32 SPSR and CPSR. In QEMU we use 1136 * env->uncached_cpsr bit 21 to store PSTATE.SS when executing in AArch32, 1137 * where it is live state but not accessible to the AArch32 code. 1138 */ 1139 #define CPSR_RESERVED (0x7U << 21) 1140 #define CPSR_J (1U << 24) 1141 #define CPSR_IT_0_1 (3U << 25) 1142 #define CPSR_Q (1U << 27) 1143 #define CPSR_V (1U << 28) 1144 #define CPSR_C (1U << 29) 1145 #define CPSR_Z (1U << 30) 1146 #define CPSR_N (1U << 31) 1147 #define CPSR_NZCV (CPSR_N | CPSR_Z | CPSR_C | CPSR_V) 1148 #define CPSR_AIF (CPSR_A | CPSR_I | CPSR_F) 1149 1150 #define CPSR_IT (CPSR_IT_0_1 | CPSR_IT_2_7) 1151 #define CACHED_CPSR_BITS (CPSR_T | CPSR_AIF | CPSR_GE | CPSR_IT | CPSR_Q \ 1152 | CPSR_NZCV) 1153 /* Bits writable in user mode. */ 1154 #define CPSR_USER (CPSR_NZCV | CPSR_Q | CPSR_GE) 1155 /* Execution state bits. MRS read as zero, MSR writes ignored. */ 1156 #define CPSR_EXEC (CPSR_T | CPSR_IT | CPSR_J | CPSR_IL) 1157 /* Mask of bits which may be set by exception return copying them from SPSR */ 1158 #define CPSR_ERET_MASK (~CPSR_RESERVED) 1159 1160 /* Bit definitions for M profile XPSR. Most are the same as CPSR. */ 1161 #define XPSR_EXCP 0x1ffU 1162 #define XPSR_SPREALIGN (1U << 9) /* Only set in exception stack frames */ 1163 #define XPSR_IT_2_7 CPSR_IT_2_7 1164 #define XPSR_GE CPSR_GE 1165 #define XPSR_SFPA (1U << 20) /* Only set in exception stack frames */ 1166 #define XPSR_T (1U << 24) /* Not the same as CPSR_T ! */ 1167 #define XPSR_IT_0_1 CPSR_IT_0_1 1168 #define XPSR_Q CPSR_Q 1169 #define XPSR_V CPSR_V 1170 #define XPSR_C CPSR_C 1171 #define XPSR_Z CPSR_Z 1172 #define XPSR_N CPSR_N 1173 #define XPSR_NZCV CPSR_NZCV 1174 #define XPSR_IT CPSR_IT 1175 1176 #define TTBCR_N (7U << 0) /* TTBCR.EAE==0 */ 1177 #define TTBCR_T0SZ (7U << 0) /* TTBCR.EAE==1 */ 1178 #define TTBCR_PD0 (1U << 4) 1179 #define TTBCR_PD1 (1U << 5) 1180 #define TTBCR_EPD0 (1U << 7) 1181 #define TTBCR_IRGN0 (3U << 8) 1182 #define TTBCR_ORGN0 (3U << 10) 1183 #define TTBCR_SH0 (3U << 12) 1184 #define TTBCR_T1SZ (3U << 16) 1185 #define TTBCR_A1 (1U << 22) 1186 #define TTBCR_EPD1 (1U << 23) 1187 #define TTBCR_IRGN1 (3U << 24) 1188 #define TTBCR_ORGN1 (3U << 26) 1189 #define TTBCR_SH1 (1U << 28) 1190 #define TTBCR_EAE (1U << 31) 1191 1192 /* Bit definitions for ARMv8 SPSR (PSTATE) format. 1193 * Only these are valid when in AArch64 mode; in 1194 * AArch32 mode SPSRs are basically CPSR-format. 1195 */ 1196 #define PSTATE_SP (1U) 1197 #define PSTATE_M (0xFU) 1198 #define PSTATE_nRW (1U << 4) 1199 #define PSTATE_F (1U << 6) 1200 #define PSTATE_I (1U << 7) 1201 #define PSTATE_A (1U << 8) 1202 #define PSTATE_D (1U << 9) 1203 #define PSTATE_BTYPE (3U << 10) 1204 #define PSTATE_IL (1U << 20) 1205 #define PSTATE_SS (1U << 21) 1206 #define PSTATE_V (1U << 28) 1207 #define PSTATE_C (1U << 29) 1208 #define PSTATE_Z (1U << 30) 1209 #define PSTATE_N (1U << 31) 1210 #define PSTATE_NZCV (PSTATE_N | PSTATE_Z | PSTATE_C | PSTATE_V) 1211 #define PSTATE_DAIF (PSTATE_D | PSTATE_A | PSTATE_I | PSTATE_F) 1212 #define CACHED_PSTATE_BITS (PSTATE_NZCV | PSTATE_DAIF | PSTATE_BTYPE) 1213 /* Mode values for AArch64 */ 1214 #define PSTATE_MODE_EL3h 13 1215 #define PSTATE_MODE_EL3t 12 1216 #define PSTATE_MODE_EL2h 9 1217 #define PSTATE_MODE_EL2t 8 1218 #define PSTATE_MODE_EL1h 5 1219 #define PSTATE_MODE_EL1t 4 1220 #define PSTATE_MODE_EL0t 0 1221 1222 /* Write a new value to v7m.exception, thus transitioning into or out 1223 * of Handler mode; this may result in a change of active stack pointer. 1224 */ 1225 void write_v7m_exception(CPUARMState *env, uint32_t new_exc); 1226 1227 /* Map EL and handler into a PSTATE_MODE. */ 1228 static inline unsigned int aarch64_pstate_mode(unsigned int el, bool handler) 1229 { 1230 return (el << 2) | handler; 1231 } 1232 1233 /* Return the current PSTATE value. For the moment we don't support 32<->64 bit 1234 * interprocessing, so we don't attempt to sync with the cpsr state used by 1235 * the 32 bit decoder. 1236 */ 1237 static inline uint32_t pstate_read(CPUARMState *env) 1238 { 1239 int ZF; 1240 1241 ZF = (env->ZF == 0); 1242 return (env->NF & 0x80000000) | (ZF << 30) 1243 | (env->CF << 29) | ((env->VF & 0x80000000) >> 3) 1244 | env->pstate | env->daif | (env->btype << 10); 1245 } 1246 1247 static inline void pstate_write(CPUARMState *env, uint32_t val) 1248 { 1249 env->ZF = (~val) & PSTATE_Z; 1250 env->NF = val; 1251 env->CF = (val >> 29) & 1; 1252 env->VF = (val << 3) & 0x80000000; 1253 env->daif = val & PSTATE_DAIF; 1254 env->btype = (val >> 10) & 3; 1255 env->pstate = val & ~CACHED_PSTATE_BITS; 1256 } 1257 1258 /* Return the current CPSR value. */ 1259 uint32_t cpsr_read(CPUARMState *env); 1260 1261 typedef enum CPSRWriteType { 1262 CPSRWriteByInstr = 0, /* from guest MSR or CPS */ 1263 CPSRWriteExceptionReturn = 1, /* from guest exception return insn */ 1264 CPSRWriteRaw = 2, /* trust values, do not switch reg banks */ 1265 CPSRWriteByGDBStub = 3, /* from the GDB stub */ 1266 } CPSRWriteType; 1267 1268 /* Set the CPSR. Note that some bits of mask must be all-set or all-clear.*/ 1269 void cpsr_write(CPUARMState *env, uint32_t val, uint32_t mask, 1270 CPSRWriteType write_type); 1271 1272 /* Return the current xPSR value. */ 1273 static inline uint32_t xpsr_read(CPUARMState *env) 1274 { 1275 int ZF; 1276 ZF = (env->ZF == 0); 1277 return (env->NF & 0x80000000) | (ZF << 30) 1278 | (env->CF << 29) | ((env->VF & 0x80000000) >> 3) | (env->QF << 27) 1279 | (env->thumb << 24) | ((env->condexec_bits & 3) << 25) 1280 | ((env->condexec_bits & 0xfc) << 8) 1281 | env->v7m.exception; 1282 } 1283 1284 /* Set the xPSR. Note that some bits of mask must be all-set or all-clear. */ 1285 static inline void xpsr_write(CPUARMState *env, uint32_t val, uint32_t mask) 1286 { 1287 if (mask & XPSR_NZCV) { 1288 env->ZF = (~val) & XPSR_Z; 1289 env->NF = val; 1290 env->CF = (val >> 29) & 1; 1291 env->VF = (val << 3) & 0x80000000; 1292 } 1293 if (mask & XPSR_Q) { 1294 env->QF = ((val & XPSR_Q) != 0); 1295 } 1296 if (mask & XPSR_T) { 1297 env->thumb = ((val & XPSR_T) != 0); 1298 } 1299 if (mask & XPSR_IT_0_1) { 1300 env->condexec_bits &= ~3; 1301 env->condexec_bits |= (val >> 25) & 3; 1302 } 1303 if (mask & XPSR_IT_2_7) { 1304 env->condexec_bits &= 3; 1305 env->condexec_bits |= (val >> 8) & 0xfc; 1306 } 1307 if (mask & XPSR_EXCP) { 1308 /* Note that this only happens on exception exit */ 1309 write_v7m_exception(env, val & XPSR_EXCP); 1310 } 1311 } 1312 1313 #define HCR_VM (1ULL << 0) 1314 #define HCR_SWIO (1ULL << 1) 1315 #define HCR_PTW (1ULL << 2) 1316 #define HCR_FMO (1ULL << 3) 1317 #define HCR_IMO (1ULL << 4) 1318 #define HCR_AMO (1ULL << 5) 1319 #define HCR_VF (1ULL << 6) 1320 #define HCR_VI (1ULL << 7) 1321 #define HCR_VSE (1ULL << 8) 1322 #define HCR_FB (1ULL << 9) 1323 #define HCR_BSU_MASK (3ULL << 10) 1324 #define HCR_DC (1ULL << 12) 1325 #define HCR_TWI (1ULL << 13) 1326 #define HCR_TWE (1ULL << 14) 1327 #define HCR_TID0 (1ULL << 15) 1328 #define HCR_TID1 (1ULL << 16) 1329 #define HCR_TID2 (1ULL << 17) 1330 #define HCR_TID3 (1ULL << 18) 1331 #define HCR_TSC (1ULL << 19) 1332 #define HCR_TIDCP (1ULL << 20) 1333 #define HCR_TACR (1ULL << 21) 1334 #define HCR_TSW (1ULL << 22) 1335 #define HCR_TPCP (1ULL << 23) 1336 #define HCR_TPU (1ULL << 24) 1337 #define HCR_TTLB (1ULL << 25) 1338 #define HCR_TVM (1ULL << 26) 1339 #define HCR_TGE (1ULL << 27) 1340 #define HCR_TDZ (1ULL << 28) 1341 #define HCR_HCD (1ULL << 29) 1342 #define HCR_TRVM (1ULL << 30) 1343 #define HCR_RW (1ULL << 31) 1344 #define HCR_CD (1ULL << 32) 1345 #define HCR_ID (1ULL << 33) 1346 #define HCR_E2H (1ULL << 34) 1347 #define HCR_TLOR (1ULL << 35) 1348 #define HCR_TERR (1ULL << 36) 1349 #define HCR_TEA (1ULL << 37) 1350 #define HCR_MIOCNCE (1ULL << 38) 1351 #define HCR_APK (1ULL << 40) 1352 #define HCR_API (1ULL << 41) 1353 #define HCR_NV (1ULL << 42) 1354 #define HCR_NV1 (1ULL << 43) 1355 #define HCR_AT (1ULL << 44) 1356 #define HCR_NV2 (1ULL << 45) 1357 #define HCR_FWB (1ULL << 46) 1358 #define HCR_FIEN (1ULL << 47) 1359 #define HCR_TID4 (1ULL << 49) 1360 #define HCR_TICAB (1ULL << 50) 1361 #define HCR_TOCU (1ULL << 52) 1362 #define HCR_TTLBIS (1ULL << 54) 1363 #define HCR_TTLBOS (1ULL << 55) 1364 #define HCR_ATA (1ULL << 56) 1365 #define HCR_DCT (1ULL << 57) 1366 1367 /* 1368 * When we actually implement ARMv8.1-VHE we should add HCR_E2H to 1369 * HCR_MASK and then clear it again if the feature bit is not set in 1370 * hcr_write(). 1371 */ 1372 #define HCR_MASK ((1ULL << 34) - 1) 1373 1374 #define SCR_NS (1U << 0) 1375 #define SCR_IRQ (1U << 1) 1376 #define SCR_FIQ (1U << 2) 1377 #define SCR_EA (1U << 3) 1378 #define SCR_FW (1U << 4) 1379 #define SCR_AW (1U << 5) 1380 #define SCR_NET (1U << 6) 1381 #define SCR_SMD (1U << 7) 1382 #define SCR_HCE (1U << 8) 1383 #define SCR_SIF (1U << 9) 1384 #define SCR_RW (1U << 10) 1385 #define SCR_ST (1U << 11) 1386 #define SCR_TWI (1U << 12) 1387 #define SCR_TWE (1U << 13) 1388 #define SCR_TLOR (1U << 14) 1389 #define SCR_TERR (1U << 15) 1390 #define SCR_APK (1U << 16) 1391 #define SCR_API (1U << 17) 1392 #define SCR_EEL2 (1U << 18) 1393 #define SCR_EASE (1U << 19) 1394 #define SCR_NMEA (1U << 20) 1395 #define SCR_FIEN (1U << 21) 1396 #define SCR_ENSCXT (1U << 25) 1397 #define SCR_ATA (1U << 26) 1398 1399 /* Return the current FPSCR value. */ 1400 uint32_t vfp_get_fpscr(CPUARMState *env); 1401 void vfp_set_fpscr(CPUARMState *env, uint32_t val); 1402 1403 /* FPCR, Floating Point Control Register 1404 * FPSR, Floating Poiht Status Register 1405 * 1406 * For A64 the FPSCR is split into two logically distinct registers, 1407 * FPCR and FPSR. However since they still use non-overlapping bits 1408 * we store the underlying state in fpscr and just mask on read/write. 1409 */ 1410 #define FPSR_MASK 0xf800009f 1411 #define FPCR_MASK 0x07ff9f00 1412 1413 #define FPCR_IOE (1 << 8) /* Invalid Operation exception trap enable */ 1414 #define FPCR_DZE (1 << 9) /* Divide by Zero exception trap enable */ 1415 #define FPCR_OFE (1 << 10) /* Overflow exception trap enable */ 1416 #define FPCR_UFE (1 << 11) /* Underflow exception trap enable */ 1417 #define FPCR_IXE (1 << 12) /* Inexact exception trap enable */ 1418 #define FPCR_IDE (1 << 15) /* Input Denormal exception trap enable */ 1419 #define FPCR_FZ16 (1 << 19) /* ARMv8.2+, FP16 flush-to-zero */ 1420 #define FPCR_FZ (1 << 24) /* Flush-to-zero enable bit */ 1421 #define FPCR_DN (1 << 25) /* Default NaN enable bit */ 1422 #define FPCR_QC (1 << 27) /* Cumulative saturation bit */ 1423 1424 static inline uint32_t vfp_get_fpsr(CPUARMState *env) 1425 { 1426 return vfp_get_fpscr(env) & FPSR_MASK; 1427 } 1428 1429 static inline void vfp_set_fpsr(CPUARMState *env, uint32_t val) 1430 { 1431 uint32_t new_fpscr = (vfp_get_fpscr(env) & ~FPSR_MASK) | (val & FPSR_MASK); 1432 vfp_set_fpscr(env, new_fpscr); 1433 } 1434 1435 static inline uint32_t vfp_get_fpcr(CPUARMState *env) 1436 { 1437 return vfp_get_fpscr(env) & FPCR_MASK; 1438 } 1439 1440 static inline void vfp_set_fpcr(CPUARMState *env, uint32_t val) 1441 { 1442 uint32_t new_fpscr = (vfp_get_fpscr(env) & ~FPCR_MASK) | (val & FPCR_MASK); 1443 vfp_set_fpscr(env, new_fpscr); 1444 } 1445 1446 enum arm_cpu_mode { 1447 ARM_CPU_MODE_USR = 0x10, 1448 ARM_CPU_MODE_FIQ = 0x11, 1449 ARM_CPU_MODE_IRQ = 0x12, 1450 ARM_CPU_MODE_SVC = 0x13, 1451 ARM_CPU_MODE_MON = 0x16, 1452 ARM_CPU_MODE_ABT = 0x17, 1453 ARM_CPU_MODE_HYP = 0x1a, 1454 ARM_CPU_MODE_UND = 0x1b, 1455 ARM_CPU_MODE_SYS = 0x1f 1456 }; 1457 1458 /* VFP system registers. */ 1459 #define ARM_VFP_FPSID 0 1460 #define ARM_VFP_FPSCR 1 1461 #define ARM_VFP_MVFR2 5 1462 #define ARM_VFP_MVFR1 6 1463 #define ARM_VFP_MVFR0 7 1464 #define ARM_VFP_FPEXC 8 1465 #define ARM_VFP_FPINST 9 1466 #define ARM_VFP_FPINST2 10 1467 1468 /* iwMMXt coprocessor control registers. */ 1469 #define ARM_IWMMXT_wCID 0 1470 #define ARM_IWMMXT_wCon 1 1471 #define ARM_IWMMXT_wCSSF 2 1472 #define ARM_IWMMXT_wCASF 3 1473 #define ARM_IWMMXT_wCGR0 8 1474 #define ARM_IWMMXT_wCGR1 9 1475 #define ARM_IWMMXT_wCGR2 10 1476 #define ARM_IWMMXT_wCGR3 11 1477 1478 /* V7M CCR bits */ 1479 FIELD(V7M_CCR, NONBASETHRDENA, 0, 1) 1480 FIELD(V7M_CCR, USERSETMPEND, 1, 1) 1481 FIELD(V7M_CCR, UNALIGN_TRP, 3, 1) 1482 FIELD(V7M_CCR, DIV_0_TRP, 4, 1) 1483 FIELD(V7M_CCR, BFHFNMIGN, 8, 1) 1484 FIELD(V7M_CCR, STKALIGN, 9, 1) 1485 FIELD(V7M_CCR, STKOFHFNMIGN, 10, 1) 1486 FIELD(V7M_CCR, DC, 16, 1) 1487 FIELD(V7M_CCR, IC, 17, 1) 1488 FIELD(V7M_CCR, BP, 18, 1) 1489 1490 /* V7M SCR bits */ 1491 FIELD(V7M_SCR, SLEEPONEXIT, 1, 1) 1492 FIELD(V7M_SCR, SLEEPDEEP, 2, 1) 1493 FIELD(V7M_SCR, SLEEPDEEPS, 3, 1) 1494 FIELD(V7M_SCR, SEVONPEND, 4, 1) 1495 1496 /* V7M AIRCR bits */ 1497 FIELD(V7M_AIRCR, VECTRESET, 0, 1) 1498 FIELD(V7M_AIRCR, VECTCLRACTIVE, 1, 1) 1499 FIELD(V7M_AIRCR, SYSRESETREQ, 2, 1) 1500 FIELD(V7M_AIRCR, SYSRESETREQS, 3, 1) 1501 FIELD(V7M_AIRCR, PRIGROUP, 8, 3) 1502 FIELD(V7M_AIRCR, BFHFNMINS, 13, 1) 1503 FIELD(V7M_AIRCR, PRIS, 14, 1) 1504 FIELD(V7M_AIRCR, ENDIANNESS, 15, 1) 1505 FIELD(V7M_AIRCR, VECTKEY, 16, 16) 1506 1507 /* V7M CFSR bits for MMFSR */ 1508 FIELD(V7M_CFSR, IACCVIOL, 0, 1) 1509 FIELD(V7M_CFSR, DACCVIOL, 1, 1) 1510 FIELD(V7M_CFSR, MUNSTKERR, 3, 1) 1511 FIELD(V7M_CFSR, MSTKERR, 4, 1) 1512 FIELD(V7M_CFSR, MLSPERR, 5, 1) 1513 FIELD(V7M_CFSR, MMARVALID, 7, 1) 1514 1515 /* V7M CFSR bits for BFSR */ 1516 FIELD(V7M_CFSR, IBUSERR, 8 + 0, 1) 1517 FIELD(V7M_CFSR, PRECISERR, 8 + 1, 1) 1518 FIELD(V7M_CFSR, IMPRECISERR, 8 + 2, 1) 1519 FIELD(V7M_CFSR, UNSTKERR, 8 + 3, 1) 1520 FIELD(V7M_CFSR, STKERR, 8 + 4, 1) 1521 FIELD(V7M_CFSR, LSPERR, 8 + 5, 1) 1522 FIELD(V7M_CFSR, BFARVALID, 8 + 7, 1) 1523 1524 /* V7M CFSR bits for UFSR */ 1525 FIELD(V7M_CFSR, UNDEFINSTR, 16 + 0, 1) 1526 FIELD(V7M_CFSR, INVSTATE, 16 + 1, 1) 1527 FIELD(V7M_CFSR, INVPC, 16 + 2, 1) 1528 FIELD(V7M_CFSR, NOCP, 16 + 3, 1) 1529 FIELD(V7M_CFSR, STKOF, 16 + 4, 1) 1530 FIELD(V7M_CFSR, UNALIGNED, 16 + 8, 1) 1531 FIELD(V7M_CFSR, DIVBYZERO, 16 + 9, 1) 1532 1533 /* V7M CFSR bit masks covering all of the subregister bits */ 1534 FIELD(V7M_CFSR, MMFSR, 0, 8) 1535 FIELD(V7M_CFSR, BFSR, 8, 8) 1536 FIELD(V7M_CFSR, UFSR, 16, 16) 1537 1538 /* V7M HFSR bits */ 1539 FIELD(V7M_HFSR, VECTTBL, 1, 1) 1540 FIELD(V7M_HFSR, FORCED, 30, 1) 1541 FIELD(V7M_HFSR, DEBUGEVT, 31, 1) 1542 1543 /* V7M DFSR bits */ 1544 FIELD(V7M_DFSR, HALTED, 0, 1) 1545 FIELD(V7M_DFSR, BKPT, 1, 1) 1546 FIELD(V7M_DFSR, DWTTRAP, 2, 1) 1547 FIELD(V7M_DFSR, VCATCH, 3, 1) 1548 FIELD(V7M_DFSR, EXTERNAL, 4, 1) 1549 1550 /* V7M SFSR bits */ 1551 FIELD(V7M_SFSR, INVEP, 0, 1) 1552 FIELD(V7M_SFSR, INVIS, 1, 1) 1553 FIELD(V7M_SFSR, INVER, 2, 1) 1554 FIELD(V7M_SFSR, AUVIOL, 3, 1) 1555 FIELD(V7M_SFSR, INVTRAN, 4, 1) 1556 FIELD(V7M_SFSR, LSPERR, 5, 1) 1557 FIELD(V7M_SFSR, SFARVALID, 6, 1) 1558 FIELD(V7M_SFSR, LSERR, 7, 1) 1559 1560 /* v7M MPU_CTRL bits */ 1561 FIELD(V7M_MPU_CTRL, ENABLE, 0, 1) 1562 FIELD(V7M_MPU_CTRL, HFNMIENA, 1, 1) 1563 FIELD(V7M_MPU_CTRL, PRIVDEFENA, 2, 1) 1564 1565 /* v7M CLIDR bits */ 1566 FIELD(V7M_CLIDR, CTYPE_ALL, 0, 21) 1567 FIELD(V7M_CLIDR, LOUIS, 21, 3) 1568 FIELD(V7M_CLIDR, LOC, 24, 3) 1569 FIELD(V7M_CLIDR, LOUU, 27, 3) 1570 FIELD(V7M_CLIDR, ICB, 30, 2) 1571 1572 FIELD(V7M_CSSELR, IND, 0, 1) 1573 FIELD(V7M_CSSELR, LEVEL, 1, 3) 1574 /* We use the combination of InD and Level to index into cpu->ccsidr[]; 1575 * define a mask for this and check that it doesn't permit running off 1576 * the end of the array. 1577 */ 1578 FIELD(V7M_CSSELR, INDEX, 0, 4) 1579 1580 /* 1581 * System register ID fields. 1582 */ 1583 FIELD(ID_ISAR0, SWAP, 0, 4) 1584 FIELD(ID_ISAR0, BITCOUNT, 4, 4) 1585 FIELD(ID_ISAR0, BITFIELD, 8, 4) 1586 FIELD(ID_ISAR0, CMPBRANCH, 12, 4) 1587 FIELD(ID_ISAR0, COPROC, 16, 4) 1588 FIELD(ID_ISAR0, DEBUG, 20, 4) 1589 FIELD(ID_ISAR0, DIVIDE, 24, 4) 1590 1591 FIELD(ID_ISAR1, ENDIAN, 0, 4) 1592 FIELD(ID_ISAR1, EXCEPT, 4, 4) 1593 FIELD(ID_ISAR1, EXCEPT_AR, 8, 4) 1594 FIELD(ID_ISAR1, EXTEND, 12, 4) 1595 FIELD(ID_ISAR1, IFTHEN, 16, 4) 1596 FIELD(ID_ISAR1, IMMEDIATE, 20, 4) 1597 FIELD(ID_ISAR1, INTERWORK, 24, 4) 1598 FIELD(ID_ISAR1, JAZELLE, 28, 4) 1599 1600 FIELD(ID_ISAR2, LOADSTORE, 0, 4) 1601 FIELD(ID_ISAR2, MEMHINT, 4, 4) 1602 FIELD(ID_ISAR2, MULTIACCESSINT, 8, 4) 1603 FIELD(ID_ISAR2, MULT, 12, 4) 1604 FIELD(ID_ISAR2, MULTS, 16, 4) 1605 FIELD(ID_ISAR2, MULTU, 20, 4) 1606 FIELD(ID_ISAR2, PSR_AR, 24, 4) 1607 FIELD(ID_ISAR2, REVERSAL, 28, 4) 1608 1609 FIELD(ID_ISAR3, SATURATE, 0, 4) 1610 FIELD(ID_ISAR3, SIMD, 4, 4) 1611 FIELD(ID_ISAR3, SVC, 8, 4) 1612 FIELD(ID_ISAR3, SYNCHPRIM, 12, 4) 1613 FIELD(ID_ISAR3, TABBRANCH, 16, 4) 1614 FIELD(ID_ISAR3, T32COPY, 20, 4) 1615 FIELD(ID_ISAR3, TRUENOP, 24, 4) 1616 FIELD(ID_ISAR3, T32EE, 28, 4) 1617 1618 FIELD(ID_ISAR4, UNPRIV, 0, 4) 1619 FIELD(ID_ISAR4, WITHSHIFTS, 4, 4) 1620 FIELD(ID_ISAR4, WRITEBACK, 8, 4) 1621 FIELD(ID_ISAR4, SMC, 12, 4) 1622 FIELD(ID_ISAR4, BARRIER, 16, 4) 1623 FIELD(ID_ISAR4, SYNCHPRIM_FRAC, 20, 4) 1624 FIELD(ID_ISAR4, PSR_M, 24, 4) 1625 FIELD(ID_ISAR4, SWP_FRAC, 28, 4) 1626 1627 FIELD(ID_ISAR5, SEVL, 0, 4) 1628 FIELD(ID_ISAR5, AES, 4, 4) 1629 FIELD(ID_ISAR5, SHA1, 8, 4) 1630 FIELD(ID_ISAR5, SHA2, 12, 4) 1631 FIELD(ID_ISAR5, CRC32, 16, 4) 1632 FIELD(ID_ISAR5, RDM, 24, 4) 1633 FIELD(ID_ISAR5, VCMA, 28, 4) 1634 1635 FIELD(ID_ISAR6, JSCVT, 0, 4) 1636 FIELD(ID_ISAR6, DP, 4, 4) 1637 FIELD(ID_ISAR6, FHM, 8, 4) 1638 FIELD(ID_ISAR6, SB, 12, 4) 1639 FIELD(ID_ISAR6, SPECRES, 16, 4) 1640 1641 FIELD(ID_MMFR4, SPECSEI, 0, 4) 1642 FIELD(ID_MMFR4, AC2, 4, 4) 1643 FIELD(ID_MMFR4, XNX, 8, 4) 1644 FIELD(ID_MMFR4, CNP, 12, 4) 1645 FIELD(ID_MMFR4, HPDS, 16, 4) 1646 FIELD(ID_MMFR4, LSM, 20, 4) 1647 FIELD(ID_MMFR4, CCIDX, 24, 4) 1648 FIELD(ID_MMFR4, EVT, 28, 4) 1649 1650 FIELD(ID_AA64ISAR0, AES, 4, 4) 1651 FIELD(ID_AA64ISAR0, SHA1, 8, 4) 1652 FIELD(ID_AA64ISAR0, SHA2, 12, 4) 1653 FIELD(ID_AA64ISAR0, CRC32, 16, 4) 1654 FIELD(ID_AA64ISAR0, ATOMIC, 20, 4) 1655 FIELD(ID_AA64ISAR0, RDM, 28, 4) 1656 FIELD(ID_AA64ISAR0, SHA3, 32, 4) 1657 FIELD(ID_AA64ISAR0, SM3, 36, 4) 1658 FIELD(ID_AA64ISAR0, SM4, 40, 4) 1659 FIELD(ID_AA64ISAR0, DP, 44, 4) 1660 FIELD(ID_AA64ISAR0, FHM, 48, 4) 1661 FIELD(ID_AA64ISAR0, TS, 52, 4) 1662 FIELD(ID_AA64ISAR0, TLB, 56, 4) 1663 FIELD(ID_AA64ISAR0, RNDR, 60, 4) 1664 1665 FIELD(ID_AA64ISAR1, DPB, 0, 4) 1666 FIELD(ID_AA64ISAR1, APA, 4, 4) 1667 FIELD(ID_AA64ISAR1, API, 8, 4) 1668 FIELD(ID_AA64ISAR1, JSCVT, 12, 4) 1669 FIELD(ID_AA64ISAR1, FCMA, 16, 4) 1670 FIELD(ID_AA64ISAR1, LRCPC, 20, 4) 1671 FIELD(ID_AA64ISAR1, GPA, 24, 4) 1672 FIELD(ID_AA64ISAR1, GPI, 28, 4) 1673 FIELD(ID_AA64ISAR1, FRINTTS, 32, 4) 1674 FIELD(ID_AA64ISAR1, SB, 36, 4) 1675 FIELD(ID_AA64ISAR1, SPECRES, 40, 4) 1676 1677 FIELD(ID_AA64PFR0, EL0, 0, 4) 1678 FIELD(ID_AA64PFR0, EL1, 4, 4) 1679 FIELD(ID_AA64PFR0, EL2, 8, 4) 1680 FIELD(ID_AA64PFR0, EL3, 12, 4) 1681 FIELD(ID_AA64PFR0, FP, 16, 4) 1682 FIELD(ID_AA64PFR0, ADVSIMD, 20, 4) 1683 FIELD(ID_AA64PFR0, GIC, 24, 4) 1684 FIELD(ID_AA64PFR0, RAS, 28, 4) 1685 FIELD(ID_AA64PFR0, SVE, 32, 4) 1686 1687 FIELD(ID_AA64PFR1, BT, 0, 4) 1688 FIELD(ID_AA64PFR1, SBSS, 4, 4) 1689 FIELD(ID_AA64PFR1, MTE, 8, 4) 1690 FIELD(ID_AA64PFR1, RAS_FRAC, 12, 4) 1691 1692 FIELD(ID_AA64MMFR0, PARANGE, 0, 4) 1693 FIELD(ID_AA64MMFR0, ASIDBITS, 4, 4) 1694 FIELD(ID_AA64MMFR0, BIGEND, 8, 4) 1695 FIELD(ID_AA64MMFR0, SNSMEM, 12, 4) 1696 FIELD(ID_AA64MMFR0, BIGENDEL0, 16, 4) 1697 FIELD(ID_AA64MMFR0, TGRAN16, 20, 4) 1698 FIELD(ID_AA64MMFR0, TGRAN64, 24, 4) 1699 FIELD(ID_AA64MMFR0, TGRAN4, 28, 4) 1700 FIELD(ID_AA64MMFR0, TGRAN16_2, 32, 4) 1701 FIELD(ID_AA64MMFR0, TGRAN64_2, 36, 4) 1702 FIELD(ID_AA64MMFR0, TGRAN4_2, 40, 4) 1703 FIELD(ID_AA64MMFR0, EXS, 44, 4) 1704 1705 FIELD(ID_AA64MMFR1, HAFDBS, 0, 4) 1706 FIELD(ID_AA64MMFR1, VMIDBITS, 4, 4) 1707 FIELD(ID_AA64MMFR1, VH, 8, 4) 1708 FIELD(ID_AA64MMFR1, HPDS, 12, 4) 1709 FIELD(ID_AA64MMFR1, LO, 16, 4) 1710 FIELD(ID_AA64MMFR1, PAN, 20, 4) 1711 FIELD(ID_AA64MMFR1, SPECSEI, 24, 4) 1712 FIELD(ID_AA64MMFR1, XNX, 28, 4) 1713 1714 FIELD(ID_DFR0, COPDBG, 0, 4) 1715 FIELD(ID_DFR0, COPSDBG, 4, 4) 1716 FIELD(ID_DFR0, MMAPDBG, 8, 4) 1717 FIELD(ID_DFR0, COPTRC, 12, 4) 1718 FIELD(ID_DFR0, MMAPTRC, 16, 4) 1719 FIELD(ID_DFR0, MPROFDBG, 20, 4) 1720 FIELD(ID_DFR0, PERFMON, 24, 4) 1721 FIELD(ID_DFR0, TRACEFILT, 28, 4) 1722 1723 FIELD(MVFR0, SIMDREG, 0, 4) 1724 FIELD(MVFR0, FPSP, 4, 4) 1725 FIELD(MVFR0, FPDP, 8, 4) 1726 FIELD(MVFR0, FPTRAP, 12, 4) 1727 FIELD(MVFR0, FPDIVIDE, 16, 4) 1728 FIELD(MVFR0, FPSQRT, 20, 4) 1729 FIELD(MVFR0, FPSHVEC, 24, 4) 1730 FIELD(MVFR0, FPROUND, 28, 4) 1731 1732 FIELD(MVFR1, FPFTZ, 0, 4) 1733 FIELD(MVFR1, FPDNAN, 4, 4) 1734 FIELD(MVFR1, SIMDLS, 8, 4) 1735 FIELD(MVFR1, SIMDINT, 12, 4) 1736 FIELD(MVFR1, SIMDSP, 16, 4) 1737 FIELD(MVFR1, SIMDHP, 20, 4) 1738 FIELD(MVFR1, FPHP, 24, 4) 1739 FIELD(MVFR1, SIMDFMAC, 28, 4) 1740 1741 FIELD(MVFR2, SIMDMISC, 0, 4) 1742 FIELD(MVFR2, FPMISC, 4, 4) 1743 1744 QEMU_BUILD_BUG_ON(ARRAY_SIZE(((ARMCPU *)0)->ccsidr) <= R_V7M_CSSELR_INDEX_MASK); 1745 1746 /* If adding a feature bit which corresponds to a Linux ELF 1747 * HWCAP bit, remember to update the feature-bit-to-hwcap 1748 * mapping in linux-user/elfload.c:get_elf_hwcap(). 1749 */ 1750 enum arm_features { 1751 ARM_FEATURE_VFP, 1752 ARM_FEATURE_AUXCR, /* ARM1026 Auxiliary control register. */ 1753 ARM_FEATURE_XSCALE, /* Intel XScale extensions. */ 1754 ARM_FEATURE_IWMMXT, /* Intel iwMMXt extension. */ 1755 ARM_FEATURE_V6, 1756 ARM_FEATURE_V6K, 1757 ARM_FEATURE_V7, 1758 ARM_FEATURE_THUMB2, 1759 ARM_FEATURE_PMSA, /* no MMU; may have Memory Protection Unit */ 1760 ARM_FEATURE_VFP3, 1761 ARM_FEATURE_NEON, 1762 ARM_FEATURE_M, /* Microcontroller profile. */ 1763 ARM_FEATURE_OMAPCP, /* OMAP specific CP15 ops handling. */ 1764 ARM_FEATURE_THUMB2EE, 1765 ARM_FEATURE_V7MP, /* v7 Multiprocessing Extensions */ 1766 ARM_FEATURE_V7VE, /* v7 Virtualization Extensions (non-EL2 parts) */ 1767 ARM_FEATURE_V4T, 1768 ARM_FEATURE_V5, 1769 ARM_FEATURE_STRONGARM, 1770 ARM_FEATURE_VAPA, /* cp15 VA to PA lookups */ 1771 ARM_FEATURE_VFP4, /* VFPv4 (implies that NEON is v2) */ 1772 ARM_FEATURE_GENERIC_TIMER, 1773 ARM_FEATURE_MVFR, /* Media and VFP Feature Registers 0 and 1 */ 1774 ARM_FEATURE_DUMMY_C15_REGS, /* RAZ/WI all of cp15 crn=15 */ 1775 ARM_FEATURE_CACHE_TEST_CLEAN, /* 926/1026 style test-and-clean ops */ 1776 ARM_FEATURE_CACHE_DIRTY_REG, /* 1136/1176 cache dirty status register */ 1777 ARM_FEATURE_CACHE_BLOCK_OPS, /* v6 optional cache block operations */ 1778 ARM_FEATURE_MPIDR, /* has cp15 MPIDR */ 1779 ARM_FEATURE_PXN, /* has Privileged Execute Never bit */ 1780 ARM_FEATURE_LPAE, /* has Large Physical Address Extension */ 1781 ARM_FEATURE_V8, 1782 ARM_FEATURE_AARCH64, /* supports 64 bit mode */ 1783 ARM_FEATURE_CBAR, /* has cp15 CBAR */ 1784 ARM_FEATURE_CRC, /* ARMv8 CRC instructions */ 1785 ARM_FEATURE_CBAR_RO, /* has cp15 CBAR and it is read-only */ 1786 ARM_FEATURE_EL2, /* has EL2 Virtualization support */ 1787 ARM_FEATURE_EL3, /* has EL3 Secure monitor support */ 1788 ARM_FEATURE_THUMB_DSP, /* DSP insns supported in the Thumb encodings */ 1789 ARM_FEATURE_PMU, /* has PMU support */ 1790 ARM_FEATURE_VBAR, /* has cp15 VBAR */ 1791 ARM_FEATURE_M_SECURITY, /* M profile Security Extension */ 1792 ARM_FEATURE_M_MAIN, /* M profile Main Extension */ 1793 }; 1794 1795 static inline int arm_feature(CPUARMState *env, int feature) 1796 { 1797 return (env->features & (1ULL << feature)) != 0; 1798 } 1799 1800 #if !defined(CONFIG_USER_ONLY) 1801 /* Return true if exception levels below EL3 are in secure state, 1802 * or would be following an exception return to that level. 1803 * Unlike arm_is_secure() (which is always a question about the 1804 * _current_ state of the CPU) this doesn't care about the current 1805 * EL or mode. 1806 */ 1807 static inline bool arm_is_secure_below_el3(CPUARMState *env) 1808 { 1809 if (arm_feature(env, ARM_FEATURE_EL3)) { 1810 return !(env->cp15.scr_el3 & SCR_NS); 1811 } else { 1812 /* If EL3 is not supported then the secure state is implementation 1813 * defined, in which case QEMU defaults to non-secure. 1814 */ 1815 return false; 1816 } 1817 } 1818 1819 /* Return true if the CPU is AArch64 EL3 or AArch32 Mon */ 1820 static inline bool arm_is_el3_or_mon(CPUARMState *env) 1821 { 1822 if (arm_feature(env, ARM_FEATURE_EL3)) { 1823 if (is_a64(env) && extract32(env->pstate, 2, 2) == 3) { 1824 /* CPU currently in AArch64 state and EL3 */ 1825 return true; 1826 } else if (!is_a64(env) && 1827 (env->uncached_cpsr & CPSR_M) == ARM_CPU_MODE_MON) { 1828 /* CPU currently in AArch32 state and monitor mode */ 1829 return true; 1830 } 1831 } 1832 return false; 1833 } 1834 1835 /* Return true if the processor is in secure state */ 1836 static inline bool arm_is_secure(CPUARMState *env) 1837 { 1838 if (arm_is_el3_or_mon(env)) { 1839 return true; 1840 } 1841 return arm_is_secure_below_el3(env); 1842 } 1843 1844 #else 1845 static inline bool arm_is_secure_below_el3(CPUARMState *env) 1846 { 1847 return false; 1848 } 1849 1850 static inline bool arm_is_secure(CPUARMState *env) 1851 { 1852 return false; 1853 } 1854 #endif 1855 1856 /** 1857 * arm_hcr_el2_eff(): Return the effective value of HCR_EL2. 1858 * E.g. when in secure state, fields in HCR_EL2 are suppressed, 1859 * "for all purposes other than a direct read or write access of HCR_EL2." 1860 * Not included here is HCR_RW. 1861 */ 1862 uint64_t arm_hcr_el2_eff(CPUARMState *env); 1863 1864 /* Return true if the specified exception level is running in AArch64 state. */ 1865 static inline bool arm_el_is_aa64(CPUARMState *env, int el) 1866 { 1867 /* This isn't valid for EL0 (if we're in EL0, is_a64() is what you want, 1868 * and if we're not in EL0 then the state of EL0 isn't well defined.) 1869 */ 1870 assert(el >= 1 && el <= 3); 1871 bool aa64 = arm_feature(env, ARM_FEATURE_AARCH64); 1872 1873 /* The highest exception level is always at the maximum supported 1874 * register width, and then lower levels have a register width controlled 1875 * by bits in the SCR or HCR registers. 1876 */ 1877 if (el == 3) { 1878 return aa64; 1879 } 1880 1881 if (arm_feature(env, ARM_FEATURE_EL3)) { 1882 aa64 = aa64 && (env->cp15.scr_el3 & SCR_RW); 1883 } 1884 1885 if (el == 2) { 1886 return aa64; 1887 } 1888 1889 if (arm_feature(env, ARM_FEATURE_EL2) && !arm_is_secure_below_el3(env)) { 1890 aa64 = aa64 && (env->cp15.hcr_el2 & HCR_RW); 1891 } 1892 1893 return aa64; 1894 } 1895 1896 /* Function for determing whether guest cp register reads and writes should 1897 * access the secure or non-secure bank of a cp register. When EL3 is 1898 * operating in AArch32 state, the NS-bit determines whether the secure 1899 * instance of a cp register should be used. When EL3 is AArch64 (or if 1900 * it doesn't exist at all) then there is no register banking, and all 1901 * accesses are to the non-secure version. 1902 */ 1903 static inline bool access_secure_reg(CPUARMState *env) 1904 { 1905 bool ret = (arm_feature(env, ARM_FEATURE_EL3) && 1906 !arm_el_is_aa64(env, 3) && 1907 !(env->cp15.scr_el3 & SCR_NS)); 1908 1909 return ret; 1910 } 1911 1912 /* Macros for accessing a specified CP register bank */ 1913 #define A32_BANKED_REG_GET(_env, _regname, _secure) \ 1914 ((_secure) ? (_env)->cp15._regname##_s : (_env)->cp15._regname##_ns) 1915 1916 #define A32_BANKED_REG_SET(_env, _regname, _secure, _val) \ 1917 do { \ 1918 if (_secure) { \ 1919 (_env)->cp15._regname##_s = (_val); \ 1920 } else { \ 1921 (_env)->cp15._regname##_ns = (_val); \ 1922 } \ 1923 } while (0) 1924 1925 /* Macros for automatically accessing a specific CP register bank depending on 1926 * the current secure state of the system. These macros are not intended for 1927 * supporting instruction translation reads/writes as these are dependent 1928 * solely on the SCR.NS bit and not the mode. 1929 */ 1930 #define A32_BANKED_CURRENT_REG_GET(_env, _regname) \ 1931 A32_BANKED_REG_GET((_env), _regname, \ 1932 (arm_is_secure(_env) && !arm_el_is_aa64((_env), 3))) 1933 1934 #define A32_BANKED_CURRENT_REG_SET(_env, _regname, _val) \ 1935 A32_BANKED_REG_SET((_env), _regname, \ 1936 (arm_is_secure(_env) && !arm_el_is_aa64((_env), 3)), \ 1937 (_val)) 1938 1939 void arm_cpu_list(FILE *f, fprintf_function cpu_fprintf); 1940 uint32_t arm_phys_excp_target_el(CPUState *cs, uint32_t excp_idx, 1941 uint32_t cur_el, bool secure); 1942 1943 /* Interface between CPU and Interrupt controller. */ 1944 #ifndef CONFIG_USER_ONLY 1945 bool armv7m_nvic_can_take_pending_exception(void *opaque); 1946 #else 1947 static inline bool armv7m_nvic_can_take_pending_exception(void *opaque) 1948 { 1949 return true; 1950 } 1951 #endif 1952 /** 1953 * armv7m_nvic_set_pending: mark the specified exception as pending 1954 * @opaque: the NVIC 1955 * @irq: the exception number to mark pending 1956 * @secure: false for non-banked exceptions or for the nonsecure 1957 * version of a banked exception, true for the secure version of a banked 1958 * exception. 1959 * 1960 * Marks the specified exception as pending. Note that we will assert() 1961 * if @secure is true and @irq does not specify one of the fixed set 1962 * of architecturally banked exceptions. 1963 */ 1964 void armv7m_nvic_set_pending(void *opaque, int irq, bool secure); 1965 /** 1966 * armv7m_nvic_set_pending_derived: mark this derived exception as pending 1967 * @opaque: the NVIC 1968 * @irq: the exception number to mark pending 1969 * @secure: false for non-banked exceptions or for the nonsecure 1970 * version of a banked exception, true for the secure version of a banked 1971 * exception. 1972 * 1973 * Similar to armv7m_nvic_set_pending(), but specifically for derived 1974 * exceptions (exceptions generated in the course of trying to take 1975 * a different exception). 1976 */ 1977 void armv7m_nvic_set_pending_derived(void *opaque, int irq, bool secure); 1978 /** 1979 * armv7m_nvic_get_pending_irq_info: return highest priority pending 1980 * exception, and whether it targets Secure state 1981 * @opaque: the NVIC 1982 * @pirq: set to pending exception number 1983 * @ptargets_secure: set to whether pending exception targets Secure 1984 * 1985 * This function writes the number of the highest priority pending 1986 * exception (the one which would be made active by 1987 * armv7m_nvic_acknowledge_irq()) to @pirq, and sets @ptargets_secure 1988 * to true if the current highest priority pending exception should 1989 * be taken to Secure state, false for NS. 1990 */ 1991 void armv7m_nvic_get_pending_irq_info(void *opaque, int *pirq, 1992 bool *ptargets_secure); 1993 /** 1994 * armv7m_nvic_acknowledge_irq: make highest priority pending exception active 1995 * @opaque: the NVIC 1996 * 1997 * Move the current highest priority pending exception from the pending 1998 * state to the active state, and update v7m.exception to indicate that 1999 * it is the exception currently being handled. 2000 */ 2001 void armv7m_nvic_acknowledge_irq(void *opaque); 2002 /** 2003 * armv7m_nvic_complete_irq: complete specified interrupt or exception 2004 * @opaque: the NVIC 2005 * @irq: the exception number to complete 2006 * @secure: true if this exception was secure 2007 * 2008 * Returns: -1 if the irq was not active 2009 * 1 if completing this irq brought us back to base (no active irqs) 2010 * 0 if there is still an irq active after this one was completed 2011 * (Ignoring -1, this is the same as the RETTOBASE value before completion.) 2012 */ 2013 int armv7m_nvic_complete_irq(void *opaque, int irq, bool secure); 2014 /** 2015 * armv7m_nvic_raw_execution_priority: return the raw execution priority 2016 * @opaque: the NVIC 2017 * 2018 * Returns: the raw execution priority as defined by the v8M architecture. 2019 * This is the execution priority minus the effects of AIRCR.PRIS, 2020 * and minus any PRIMASK/FAULTMASK/BASEPRI priority boosting. 2021 * (v8M ARM ARM I_PKLD.) 2022 */ 2023 int armv7m_nvic_raw_execution_priority(void *opaque); 2024 /** 2025 * armv7m_nvic_neg_prio_requested: return true if the requested execution 2026 * priority is negative for the specified security state. 2027 * @opaque: the NVIC 2028 * @secure: the security state to test 2029 * This corresponds to the pseudocode IsReqExecPriNeg(). 2030 */ 2031 #ifndef CONFIG_USER_ONLY 2032 bool armv7m_nvic_neg_prio_requested(void *opaque, bool secure); 2033 #else 2034 static inline bool armv7m_nvic_neg_prio_requested(void *opaque, bool secure) 2035 { 2036 return false; 2037 } 2038 #endif 2039 2040 /* Interface for defining coprocessor registers. 2041 * Registers are defined in tables of arm_cp_reginfo structs 2042 * which are passed to define_arm_cp_regs(). 2043 */ 2044 2045 /* When looking up a coprocessor register we look for it 2046 * via an integer which encodes all of: 2047 * coprocessor number 2048 * Crn, Crm, opc1, opc2 fields 2049 * 32 or 64 bit register (ie is it accessed via MRC/MCR 2050 * or via MRRC/MCRR?) 2051 * non-secure/secure bank (AArch32 only) 2052 * We allow 4 bits for opc1 because MRRC/MCRR have a 4 bit field. 2053 * (In this case crn and opc2 should be zero.) 2054 * For AArch64, there is no 32/64 bit size distinction; 2055 * instead all registers have a 2 bit op0, 3 bit op1 and op2, 2056 * and 4 bit CRn and CRm. The encoding patterns are chosen 2057 * to be easy to convert to and from the KVM encodings, and also 2058 * so that the hashtable can contain both AArch32 and AArch64 2059 * registers (to allow for interprocessing where we might run 2060 * 32 bit code on a 64 bit core). 2061 */ 2062 /* This bit is private to our hashtable cpreg; in KVM register 2063 * IDs the AArch64/32 distinction is the KVM_REG_ARM/ARM64 2064 * in the upper bits of the 64 bit ID. 2065 */ 2066 #define CP_REG_AA64_SHIFT 28 2067 #define CP_REG_AA64_MASK (1 << CP_REG_AA64_SHIFT) 2068 2069 /* To enable banking of coprocessor registers depending on ns-bit we 2070 * add a bit to distinguish between secure and non-secure cpregs in the 2071 * hashtable. 2072 */ 2073 #define CP_REG_NS_SHIFT 29 2074 #define CP_REG_NS_MASK (1 << CP_REG_NS_SHIFT) 2075 2076 #define ENCODE_CP_REG(cp, is64, ns, crn, crm, opc1, opc2) \ 2077 ((ns) << CP_REG_NS_SHIFT | ((cp) << 16) | ((is64) << 15) | \ 2078 ((crn) << 11) | ((crm) << 7) | ((opc1) << 3) | (opc2)) 2079 2080 #define ENCODE_AA64_CP_REG(cp, crn, crm, op0, op1, op2) \ 2081 (CP_REG_AA64_MASK | \ 2082 ((cp) << CP_REG_ARM_COPROC_SHIFT) | \ 2083 ((op0) << CP_REG_ARM64_SYSREG_OP0_SHIFT) | \ 2084 ((op1) << CP_REG_ARM64_SYSREG_OP1_SHIFT) | \ 2085 ((crn) << CP_REG_ARM64_SYSREG_CRN_SHIFT) | \ 2086 ((crm) << CP_REG_ARM64_SYSREG_CRM_SHIFT) | \ 2087 ((op2) << CP_REG_ARM64_SYSREG_OP2_SHIFT)) 2088 2089 /* Convert a full 64 bit KVM register ID to the truncated 32 bit 2090 * version used as a key for the coprocessor register hashtable 2091 */ 2092 static inline uint32_t kvm_to_cpreg_id(uint64_t kvmid) 2093 { 2094 uint32_t cpregid = kvmid; 2095 if ((kvmid & CP_REG_ARCH_MASK) == CP_REG_ARM64) { 2096 cpregid |= CP_REG_AA64_MASK; 2097 } else { 2098 if ((kvmid & CP_REG_SIZE_MASK) == CP_REG_SIZE_U64) { 2099 cpregid |= (1 << 15); 2100 } 2101 2102 /* KVM is always non-secure so add the NS flag on AArch32 register 2103 * entries. 2104 */ 2105 cpregid |= 1 << CP_REG_NS_SHIFT; 2106 } 2107 return cpregid; 2108 } 2109 2110 /* Convert a truncated 32 bit hashtable key into the full 2111 * 64 bit KVM register ID. 2112 */ 2113 static inline uint64_t cpreg_to_kvm_id(uint32_t cpregid) 2114 { 2115 uint64_t kvmid; 2116 2117 if (cpregid & CP_REG_AA64_MASK) { 2118 kvmid = cpregid & ~CP_REG_AA64_MASK; 2119 kvmid |= CP_REG_SIZE_U64 | CP_REG_ARM64; 2120 } else { 2121 kvmid = cpregid & ~(1 << 15); 2122 if (cpregid & (1 << 15)) { 2123 kvmid |= CP_REG_SIZE_U64 | CP_REG_ARM; 2124 } else { 2125 kvmid |= CP_REG_SIZE_U32 | CP_REG_ARM; 2126 } 2127 } 2128 return kvmid; 2129 } 2130 2131 /* ARMCPRegInfo type field bits. If the SPECIAL bit is set this is a 2132 * special-behaviour cp reg and bits [11..8] indicate what behaviour 2133 * it has. Otherwise it is a simple cp reg, where CONST indicates that 2134 * TCG can assume the value to be constant (ie load at translate time) 2135 * and 64BIT indicates a 64 bit wide coprocessor register. SUPPRESS_TB_END 2136 * indicates that the TB should not be ended after a write to this register 2137 * (the default is that the TB ends after cp writes). OVERRIDE permits 2138 * a register definition to override a previous definition for the 2139 * same (cp, is64, crn, crm, opc1, opc2) tuple: either the new or the 2140 * old must have the OVERRIDE bit set. 2141 * ALIAS indicates that this register is an alias view of some underlying 2142 * state which is also visible via another register, and that the other 2143 * register is handling migration and reset; registers marked ALIAS will not be 2144 * migrated but may have their state set by syncing of register state from KVM. 2145 * NO_RAW indicates that this register has no underlying state and does not 2146 * support raw access for state saving/loading; it will not be used for either 2147 * migration or KVM state synchronization. (Typically this is for "registers" 2148 * which are actually used as instructions for cache maintenance and so on.) 2149 * IO indicates that this register does I/O and therefore its accesses 2150 * need to be surrounded by gen_io_start()/gen_io_end(). In particular, 2151 * registers which implement clocks or timers require this. 2152 */ 2153 #define ARM_CP_SPECIAL 0x0001 2154 #define ARM_CP_CONST 0x0002 2155 #define ARM_CP_64BIT 0x0004 2156 #define ARM_CP_SUPPRESS_TB_END 0x0008 2157 #define ARM_CP_OVERRIDE 0x0010 2158 #define ARM_CP_ALIAS 0x0020 2159 #define ARM_CP_IO 0x0040 2160 #define ARM_CP_NO_RAW 0x0080 2161 #define ARM_CP_NOP (ARM_CP_SPECIAL | 0x0100) 2162 #define ARM_CP_WFI (ARM_CP_SPECIAL | 0x0200) 2163 #define ARM_CP_NZCV (ARM_CP_SPECIAL | 0x0300) 2164 #define ARM_CP_CURRENTEL (ARM_CP_SPECIAL | 0x0400) 2165 #define ARM_CP_DC_ZVA (ARM_CP_SPECIAL | 0x0500) 2166 #define ARM_LAST_SPECIAL ARM_CP_DC_ZVA 2167 #define ARM_CP_FPU 0x1000 2168 #define ARM_CP_SVE 0x2000 2169 #define ARM_CP_NO_GDB 0x4000 2170 /* Used only as a terminator for ARMCPRegInfo lists */ 2171 #define ARM_CP_SENTINEL 0xffff 2172 /* Mask of only the flag bits in a type field */ 2173 #define ARM_CP_FLAG_MASK 0x70ff 2174 2175 /* Valid values for ARMCPRegInfo state field, indicating which of 2176 * the AArch32 and AArch64 execution states this register is visible in. 2177 * If the reginfo doesn't explicitly specify then it is AArch32 only. 2178 * If the reginfo is declared to be visible in both states then a second 2179 * reginfo is synthesised for the AArch32 view of the AArch64 register, 2180 * such that the AArch32 view is the lower 32 bits of the AArch64 one. 2181 * Note that we rely on the values of these enums as we iterate through 2182 * the various states in some places. 2183 */ 2184 enum { 2185 ARM_CP_STATE_AA32 = 0, 2186 ARM_CP_STATE_AA64 = 1, 2187 ARM_CP_STATE_BOTH = 2, 2188 }; 2189 2190 /* ARM CP register secure state flags. These flags identify security state 2191 * attributes for a given CP register entry. 2192 * The existence of both or neither secure and non-secure flags indicates that 2193 * the register has both a secure and non-secure hash entry. A single one of 2194 * these flags causes the register to only be hashed for the specified 2195 * security state. 2196 * Although definitions may have any combination of the S/NS bits, each 2197 * registered entry will only have one to identify whether the entry is secure 2198 * or non-secure. 2199 */ 2200 enum { 2201 ARM_CP_SECSTATE_S = (1 << 0), /* bit[0]: Secure state register */ 2202 ARM_CP_SECSTATE_NS = (1 << 1), /* bit[1]: Non-secure state register */ 2203 }; 2204 2205 /* Return true if cptype is a valid type field. This is used to try to 2206 * catch errors where the sentinel has been accidentally left off the end 2207 * of a list of registers. 2208 */ 2209 static inline bool cptype_valid(int cptype) 2210 { 2211 return ((cptype & ~ARM_CP_FLAG_MASK) == 0) 2212 || ((cptype & ARM_CP_SPECIAL) && 2213 ((cptype & ~ARM_CP_FLAG_MASK) <= ARM_LAST_SPECIAL)); 2214 } 2215 2216 /* Access rights: 2217 * We define bits for Read and Write access for what rev C of the v7-AR ARM ARM 2218 * defines as PL0 (user), PL1 (fiq/irq/svc/abt/und/sys, ie privileged), and 2219 * PL2 (hyp). The other level which has Read and Write bits is Secure PL1 2220 * (ie any of the privileged modes in Secure state, or Monitor mode). 2221 * If a register is accessible in one privilege level it's always accessible 2222 * in higher privilege levels too. Since "Secure PL1" also follows this rule 2223 * (ie anything visible in PL2 is visible in S-PL1, some things are only 2224 * visible in S-PL1) but "Secure PL1" is a bit of a mouthful, we bend the 2225 * terminology a little and call this PL3. 2226 * In AArch64 things are somewhat simpler as the PLx bits line up exactly 2227 * with the ELx exception levels. 2228 * 2229 * If access permissions for a register are more complex than can be 2230 * described with these bits, then use a laxer set of restrictions, and 2231 * do the more restrictive/complex check inside a helper function. 2232 */ 2233 #define PL3_R 0x80 2234 #define PL3_W 0x40 2235 #define PL2_R (0x20 | PL3_R) 2236 #define PL2_W (0x10 | PL3_W) 2237 #define PL1_R (0x08 | PL2_R) 2238 #define PL1_W (0x04 | PL2_W) 2239 #define PL0_R (0x02 | PL1_R) 2240 #define PL0_W (0x01 | PL1_W) 2241 2242 /* 2243 * For user-mode some registers are accessible to EL0 via a kernel 2244 * trap-and-emulate ABI. In this case we define the read permissions 2245 * as actually being PL0_R. However some bits of any given register 2246 * may still be masked. 2247 */ 2248 #ifdef CONFIG_USER_ONLY 2249 #define PL0U_R PL0_R 2250 #else 2251 #define PL0U_R PL1_R 2252 #endif 2253 2254 #define PL3_RW (PL3_R | PL3_W) 2255 #define PL2_RW (PL2_R | PL2_W) 2256 #define PL1_RW (PL1_R | PL1_W) 2257 #define PL0_RW (PL0_R | PL0_W) 2258 2259 /* Return the highest implemented Exception Level */ 2260 static inline int arm_highest_el(CPUARMState *env) 2261 { 2262 if (arm_feature(env, ARM_FEATURE_EL3)) { 2263 return 3; 2264 } 2265 if (arm_feature(env, ARM_FEATURE_EL2)) { 2266 return 2; 2267 } 2268 return 1; 2269 } 2270 2271 /* Return true if a v7M CPU is in Handler mode */ 2272 static inline bool arm_v7m_is_handler_mode(CPUARMState *env) 2273 { 2274 return env->v7m.exception != 0; 2275 } 2276 2277 /* Return the current Exception Level (as per ARMv8; note that this differs 2278 * from the ARMv7 Privilege Level). 2279 */ 2280 static inline int arm_current_el(CPUARMState *env) 2281 { 2282 if (arm_feature(env, ARM_FEATURE_M)) { 2283 return arm_v7m_is_handler_mode(env) || 2284 !(env->v7m.control[env->v7m.secure] & 1); 2285 } 2286 2287 if (is_a64(env)) { 2288 return extract32(env->pstate, 2, 2); 2289 } 2290 2291 switch (env->uncached_cpsr & 0x1f) { 2292 case ARM_CPU_MODE_USR: 2293 return 0; 2294 case ARM_CPU_MODE_HYP: 2295 return 2; 2296 case ARM_CPU_MODE_MON: 2297 return 3; 2298 default: 2299 if (arm_is_secure(env) && !arm_el_is_aa64(env, 3)) { 2300 /* If EL3 is 32-bit then all secure privileged modes run in 2301 * EL3 2302 */ 2303 return 3; 2304 } 2305 2306 return 1; 2307 } 2308 } 2309 2310 typedef struct ARMCPRegInfo ARMCPRegInfo; 2311 2312 typedef enum CPAccessResult { 2313 /* Access is permitted */ 2314 CP_ACCESS_OK = 0, 2315 /* Access fails due to a configurable trap or enable which would 2316 * result in a categorized exception syndrome giving information about 2317 * the failing instruction (ie syndrome category 0x3, 0x4, 0x5, 0x6, 2318 * 0xc or 0x18). The exception is taken to the usual target EL (EL1 or 2319 * PL1 if in EL0, otherwise to the current EL). 2320 */ 2321 CP_ACCESS_TRAP = 1, 2322 /* Access fails and results in an exception syndrome 0x0 ("uncategorized"). 2323 * Note that this is not a catch-all case -- the set of cases which may 2324 * result in this failure is specifically defined by the architecture. 2325 */ 2326 CP_ACCESS_TRAP_UNCATEGORIZED = 2, 2327 /* As CP_ACCESS_TRAP, but for traps directly to EL2 or EL3 */ 2328 CP_ACCESS_TRAP_EL2 = 3, 2329 CP_ACCESS_TRAP_EL3 = 4, 2330 /* As CP_ACCESS_UNCATEGORIZED, but for traps directly to EL2 or EL3 */ 2331 CP_ACCESS_TRAP_UNCATEGORIZED_EL2 = 5, 2332 CP_ACCESS_TRAP_UNCATEGORIZED_EL3 = 6, 2333 /* Access fails and results in an exception syndrome for an FP access, 2334 * trapped directly to EL2 or EL3 2335 */ 2336 CP_ACCESS_TRAP_FP_EL2 = 7, 2337 CP_ACCESS_TRAP_FP_EL3 = 8, 2338 } CPAccessResult; 2339 2340 /* Access functions for coprocessor registers. These cannot fail and 2341 * may not raise exceptions. 2342 */ 2343 typedef uint64_t CPReadFn(CPUARMState *env, const ARMCPRegInfo *opaque); 2344 typedef void CPWriteFn(CPUARMState *env, const ARMCPRegInfo *opaque, 2345 uint64_t value); 2346 /* Access permission check functions for coprocessor registers. */ 2347 typedef CPAccessResult CPAccessFn(CPUARMState *env, 2348 const ARMCPRegInfo *opaque, 2349 bool isread); 2350 /* Hook function for register reset */ 2351 typedef void CPResetFn(CPUARMState *env, const ARMCPRegInfo *opaque); 2352 2353 #define CP_ANY 0xff 2354 2355 /* Definition of an ARM coprocessor register */ 2356 struct ARMCPRegInfo { 2357 /* Name of register (useful mainly for debugging, need not be unique) */ 2358 const char *name; 2359 /* Location of register: coprocessor number and (crn,crm,opc1,opc2) 2360 * tuple. Any of crm, opc1 and opc2 may be CP_ANY to indicate a 2361 * 'wildcard' field -- any value of that field in the MRC/MCR insn 2362 * will be decoded to this register. The register read and write 2363 * callbacks will be passed an ARMCPRegInfo with the crn/crm/opc1/opc2 2364 * used by the program, so it is possible to register a wildcard and 2365 * then behave differently on read/write if necessary. 2366 * For 64 bit registers, only crm and opc1 are relevant; crn and opc2 2367 * must both be zero. 2368 * For AArch64-visible registers, opc0 is also used. 2369 * Since there are no "coprocessors" in AArch64, cp is purely used as a 2370 * way to distinguish (for KVM's benefit) guest-visible system registers 2371 * from demuxed ones provided to preserve the "no side effects on 2372 * KVM register read/write from QEMU" semantics. cp==0x13 is guest 2373 * visible (to match KVM's encoding); cp==0 will be converted to 2374 * cp==0x13 when the ARMCPRegInfo is registered, for convenience. 2375 */ 2376 uint8_t cp; 2377 uint8_t crn; 2378 uint8_t crm; 2379 uint8_t opc0; 2380 uint8_t opc1; 2381 uint8_t opc2; 2382 /* Execution state in which this register is visible: ARM_CP_STATE_* */ 2383 int state; 2384 /* Register type: ARM_CP_* bits/values */ 2385 int type; 2386 /* Access rights: PL*_[RW] */ 2387 int access; 2388 /* Security state: ARM_CP_SECSTATE_* bits/values */ 2389 int secure; 2390 /* The opaque pointer passed to define_arm_cp_regs_with_opaque() when 2391 * this register was defined: can be used to hand data through to the 2392 * register read/write functions, since they are passed the ARMCPRegInfo*. 2393 */ 2394 void *opaque; 2395 /* Value of this register, if it is ARM_CP_CONST. Otherwise, if 2396 * fieldoffset is non-zero, the reset value of the register. 2397 */ 2398 uint64_t resetvalue; 2399 /* Offset of the field in CPUARMState for this register. 2400 * 2401 * This is not needed if either: 2402 * 1. type is ARM_CP_CONST or one of the ARM_CP_SPECIALs 2403 * 2. both readfn and writefn are specified 2404 */ 2405 ptrdiff_t fieldoffset; /* offsetof(CPUARMState, field) */ 2406 2407 /* Offsets of the secure and non-secure fields in CPUARMState for the 2408 * register if it is banked. These fields are only used during the static 2409 * registration of a register. During hashing the bank associated 2410 * with a given security state is copied to fieldoffset which is used from 2411 * there on out. 2412 * 2413 * It is expected that register definitions use either fieldoffset or 2414 * bank_fieldoffsets in the definition but not both. It is also expected 2415 * that both bank offsets are set when defining a banked register. This 2416 * use indicates that a register is banked. 2417 */ 2418 ptrdiff_t bank_fieldoffsets[2]; 2419 2420 /* Function for making any access checks for this register in addition to 2421 * those specified by the 'access' permissions bits. If NULL, no extra 2422 * checks required. The access check is performed at runtime, not at 2423 * translate time. 2424 */ 2425 CPAccessFn *accessfn; 2426 /* Function for handling reads of this register. If NULL, then reads 2427 * will be done by loading from the offset into CPUARMState specified 2428 * by fieldoffset. 2429 */ 2430 CPReadFn *readfn; 2431 /* Function for handling writes of this register. If NULL, then writes 2432 * will be done by writing to the offset into CPUARMState specified 2433 * by fieldoffset. 2434 */ 2435 CPWriteFn *writefn; 2436 /* Function for doing a "raw" read; used when we need to copy 2437 * coprocessor state to the kernel for KVM or out for 2438 * migration. This only needs to be provided if there is also a 2439 * readfn and it has side effects (for instance clear-on-read bits). 2440 */ 2441 CPReadFn *raw_readfn; 2442 /* Function for doing a "raw" write; used when we need to copy KVM 2443 * kernel coprocessor state into userspace, or for inbound 2444 * migration. This only needs to be provided if there is also a 2445 * writefn and it masks out "unwritable" bits or has write-one-to-clear 2446 * or similar behaviour. 2447 */ 2448 CPWriteFn *raw_writefn; 2449 /* Function for resetting the register. If NULL, then reset will be done 2450 * by writing resetvalue to the field specified in fieldoffset. If 2451 * fieldoffset is 0 then no reset will be done. 2452 */ 2453 CPResetFn *resetfn; 2454 }; 2455 2456 /* Macros which are lvalues for the field in CPUARMState for the 2457 * ARMCPRegInfo *ri. 2458 */ 2459 #define CPREG_FIELD32(env, ri) \ 2460 (*(uint32_t *)((char *)(env) + (ri)->fieldoffset)) 2461 #define CPREG_FIELD64(env, ri) \ 2462 (*(uint64_t *)((char *)(env) + (ri)->fieldoffset)) 2463 2464 #define REGINFO_SENTINEL { .type = ARM_CP_SENTINEL } 2465 2466 void define_arm_cp_regs_with_opaque(ARMCPU *cpu, 2467 const ARMCPRegInfo *regs, void *opaque); 2468 void define_one_arm_cp_reg_with_opaque(ARMCPU *cpu, 2469 const ARMCPRegInfo *regs, void *opaque); 2470 static inline void define_arm_cp_regs(ARMCPU *cpu, const ARMCPRegInfo *regs) 2471 { 2472 define_arm_cp_regs_with_opaque(cpu, regs, 0); 2473 } 2474 static inline void define_one_arm_cp_reg(ARMCPU *cpu, const ARMCPRegInfo *regs) 2475 { 2476 define_one_arm_cp_reg_with_opaque(cpu, regs, 0); 2477 } 2478 const ARMCPRegInfo *get_arm_cp_reginfo(GHashTable *cpregs, uint32_t encoded_cp); 2479 2480 /* 2481 * Definition of an ARM co-processor register as viewed from 2482 * userspace. This is used for presenting sanitised versions of 2483 * registers to userspace when emulating the Linux AArch64 CPU 2484 * ID/feature ABI (advertised as HWCAP_CPUID). 2485 */ 2486 typedef struct ARMCPRegUserSpaceInfo { 2487 /* Name of register */ 2488 const char *name; 2489 2490 /* Is the name actually a glob pattern */ 2491 bool is_glob; 2492 2493 /* Only some bits are exported to user space */ 2494 uint64_t exported_bits; 2495 2496 /* Fixed bits are applied after the mask */ 2497 uint64_t fixed_bits; 2498 } ARMCPRegUserSpaceInfo; 2499 2500 #define REGUSERINFO_SENTINEL { .name = NULL } 2501 2502 void modify_arm_cp_regs(ARMCPRegInfo *regs, const ARMCPRegUserSpaceInfo *mods); 2503 2504 /* CPWriteFn that can be used to implement writes-ignored behaviour */ 2505 void arm_cp_write_ignore(CPUARMState *env, const ARMCPRegInfo *ri, 2506 uint64_t value); 2507 /* CPReadFn that can be used for read-as-zero behaviour */ 2508 uint64_t arm_cp_read_zero(CPUARMState *env, const ARMCPRegInfo *ri); 2509 2510 /* CPResetFn that does nothing, for use if no reset is required even 2511 * if fieldoffset is non zero. 2512 */ 2513 void arm_cp_reset_ignore(CPUARMState *env, const ARMCPRegInfo *opaque); 2514 2515 /* Return true if this reginfo struct's field in the cpu state struct 2516 * is 64 bits wide. 2517 */ 2518 static inline bool cpreg_field_is_64bit(const ARMCPRegInfo *ri) 2519 { 2520 return (ri->state == ARM_CP_STATE_AA64) || (ri->type & ARM_CP_64BIT); 2521 } 2522 2523 static inline bool cp_access_ok(int current_el, 2524 const ARMCPRegInfo *ri, int isread) 2525 { 2526 return (ri->access >> ((current_el * 2) + isread)) & 1; 2527 } 2528 2529 /* Raw read of a coprocessor register (as needed for migration, etc) */ 2530 uint64_t read_raw_cp_reg(CPUARMState *env, const ARMCPRegInfo *ri); 2531 2532 /** 2533 * write_list_to_cpustate 2534 * @cpu: ARMCPU 2535 * 2536 * For each register listed in the ARMCPU cpreg_indexes list, write 2537 * its value from the cpreg_values list into the ARMCPUState structure. 2538 * This updates TCG's working data structures from KVM data or 2539 * from incoming migration state. 2540 * 2541 * Returns: true if all register values were updated correctly, 2542 * false if some register was unknown or could not be written. 2543 * Note that we do not stop early on failure -- we will attempt 2544 * writing all registers in the list. 2545 */ 2546 bool write_list_to_cpustate(ARMCPU *cpu); 2547 2548 /** 2549 * write_cpustate_to_list: 2550 * @cpu: ARMCPU 2551 * 2552 * For each register listed in the ARMCPU cpreg_indexes list, write 2553 * its value from the ARMCPUState structure into the cpreg_values list. 2554 * This is used to copy info from TCG's working data structures into 2555 * KVM or for outbound migration. 2556 * 2557 * Returns: true if all register values were read correctly, 2558 * false if some register was unknown or could not be read. 2559 * Note that we do not stop early on failure -- we will attempt 2560 * reading all registers in the list. 2561 */ 2562 bool write_cpustate_to_list(ARMCPU *cpu); 2563 2564 #define ARM_CPUID_TI915T 0x54029152 2565 #define ARM_CPUID_TI925T 0x54029252 2566 2567 #if defined(CONFIG_USER_ONLY) 2568 #define TARGET_PAGE_BITS 12 2569 #else 2570 /* ARMv7 and later CPUs have 4K pages minimum, but ARMv5 and v6 2571 * have to support 1K tiny pages. 2572 */ 2573 #define TARGET_PAGE_BITS_VARY 2574 #define TARGET_PAGE_BITS_MIN 10 2575 #endif 2576 2577 #if defined(TARGET_AARCH64) 2578 # define TARGET_PHYS_ADDR_SPACE_BITS 48 2579 # define TARGET_VIRT_ADDR_SPACE_BITS 48 2580 #else 2581 # define TARGET_PHYS_ADDR_SPACE_BITS 40 2582 # define TARGET_VIRT_ADDR_SPACE_BITS 32 2583 #endif 2584 2585 static inline bool arm_excp_unmasked(CPUState *cs, unsigned int excp_idx, 2586 unsigned int target_el) 2587 { 2588 CPUARMState *env = cs->env_ptr; 2589 unsigned int cur_el = arm_current_el(env); 2590 bool secure = arm_is_secure(env); 2591 bool pstate_unmasked; 2592 int8_t unmasked = 0; 2593 uint64_t hcr_el2; 2594 2595 /* Don't take exceptions if they target a lower EL. 2596 * This check should catch any exceptions that would not be taken but left 2597 * pending. 2598 */ 2599 if (cur_el > target_el) { 2600 return false; 2601 } 2602 2603 hcr_el2 = arm_hcr_el2_eff(env); 2604 2605 switch (excp_idx) { 2606 case EXCP_FIQ: 2607 pstate_unmasked = !(env->daif & PSTATE_F); 2608 break; 2609 2610 case EXCP_IRQ: 2611 pstate_unmasked = !(env->daif & PSTATE_I); 2612 break; 2613 2614 case EXCP_VFIQ: 2615 if (secure || !(hcr_el2 & HCR_FMO) || (hcr_el2 & HCR_TGE)) { 2616 /* VFIQs are only taken when hypervized and non-secure. */ 2617 return false; 2618 } 2619 return !(env->daif & PSTATE_F); 2620 case EXCP_VIRQ: 2621 if (secure || !(hcr_el2 & HCR_IMO) || (hcr_el2 & HCR_TGE)) { 2622 /* VIRQs are only taken when hypervized and non-secure. */ 2623 return false; 2624 } 2625 return !(env->daif & PSTATE_I); 2626 default: 2627 g_assert_not_reached(); 2628 } 2629 2630 /* Use the target EL, current execution state and SCR/HCR settings to 2631 * determine whether the corresponding CPSR bit is used to mask the 2632 * interrupt. 2633 */ 2634 if ((target_el > cur_el) && (target_el != 1)) { 2635 /* Exceptions targeting a higher EL may not be maskable */ 2636 if (arm_feature(env, ARM_FEATURE_AARCH64)) { 2637 /* 64-bit masking rules are simple: exceptions to EL3 2638 * can't be masked, and exceptions to EL2 can only be 2639 * masked from Secure state. The HCR and SCR settings 2640 * don't affect the masking logic, only the interrupt routing. 2641 */ 2642 if (target_el == 3 || !secure) { 2643 unmasked = 1; 2644 } 2645 } else { 2646 /* The old 32-bit-only environment has a more complicated 2647 * masking setup. HCR and SCR bits not only affect interrupt 2648 * routing but also change the behaviour of masking. 2649 */ 2650 bool hcr, scr; 2651 2652 switch (excp_idx) { 2653 case EXCP_FIQ: 2654 /* If FIQs are routed to EL3 or EL2 then there are cases where 2655 * we override the CPSR.F in determining if the exception is 2656 * masked or not. If neither of these are set then we fall back 2657 * to the CPSR.F setting otherwise we further assess the state 2658 * below. 2659 */ 2660 hcr = hcr_el2 & HCR_FMO; 2661 scr = (env->cp15.scr_el3 & SCR_FIQ); 2662 2663 /* When EL3 is 32-bit, the SCR.FW bit controls whether the 2664 * CPSR.F bit masks FIQ interrupts when taken in non-secure 2665 * state. If SCR.FW is set then FIQs can be masked by CPSR.F 2666 * when non-secure but only when FIQs are only routed to EL3. 2667 */ 2668 scr = scr && !((env->cp15.scr_el3 & SCR_FW) && !hcr); 2669 break; 2670 case EXCP_IRQ: 2671 /* When EL3 execution state is 32-bit, if HCR.IMO is set then 2672 * we may override the CPSR.I masking when in non-secure state. 2673 * The SCR.IRQ setting has already been taken into consideration 2674 * when setting the target EL, so it does not have a further 2675 * affect here. 2676 */ 2677 hcr = hcr_el2 & HCR_IMO; 2678 scr = false; 2679 break; 2680 default: 2681 g_assert_not_reached(); 2682 } 2683 2684 if ((scr || hcr) && !secure) { 2685 unmasked = 1; 2686 } 2687 } 2688 } 2689 2690 /* The PSTATE bits only mask the interrupt if we have not overriden the 2691 * ability above. 2692 */ 2693 return unmasked || pstate_unmasked; 2694 } 2695 2696 #define ARM_CPU_TYPE_SUFFIX "-" TYPE_ARM_CPU 2697 #define ARM_CPU_TYPE_NAME(name) (name ARM_CPU_TYPE_SUFFIX) 2698 #define CPU_RESOLVING_TYPE TYPE_ARM_CPU 2699 2700 #define cpu_signal_handler cpu_arm_signal_handler 2701 #define cpu_list arm_cpu_list 2702 2703 /* ARM has the following "translation regimes" (as the ARM ARM calls them): 2704 * 2705 * If EL3 is 64-bit: 2706 * + NonSecure EL1 & 0 stage 1 2707 * + NonSecure EL1 & 0 stage 2 2708 * + NonSecure EL2 2709 * + Secure EL1 & EL0 2710 * + Secure EL3 2711 * If EL3 is 32-bit: 2712 * + NonSecure PL1 & 0 stage 1 2713 * + NonSecure PL1 & 0 stage 2 2714 * + NonSecure PL2 2715 * + Secure PL0 & PL1 2716 * (reminder: for 32 bit EL3, Secure PL1 is *EL3*, not EL1.) 2717 * 2718 * For QEMU, an mmu_idx is not quite the same as a translation regime because: 2719 * 1. we need to split the "EL1 & 0" regimes into two mmu_idxes, because they 2720 * may differ in access permissions even if the VA->PA map is the same 2721 * 2. we want to cache in our TLB the full VA->IPA->PA lookup for a stage 1+2 2722 * translation, which means that we have one mmu_idx that deals with two 2723 * concatenated translation regimes [this sort of combined s1+2 TLB is 2724 * architecturally permitted] 2725 * 3. we don't need to allocate an mmu_idx to translations that we won't be 2726 * handling via the TLB. The only way to do a stage 1 translation without 2727 * the immediate stage 2 translation is via the ATS or AT system insns, 2728 * which can be slow-pathed and always do a page table walk. 2729 * 4. we can also safely fold together the "32 bit EL3" and "64 bit EL3" 2730 * translation regimes, because they map reasonably well to each other 2731 * and they can't both be active at the same time. 2732 * This gives us the following list of mmu_idx values: 2733 * 2734 * NS EL0 (aka NS PL0) stage 1+2 2735 * NS EL1 (aka NS PL1) stage 1+2 2736 * NS EL2 (aka NS PL2) 2737 * S EL3 (aka S PL1) 2738 * S EL0 (aka S PL0) 2739 * S EL1 (not used if EL3 is 32 bit) 2740 * NS EL0+1 stage 2 2741 * 2742 * (The last of these is an mmu_idx because we want to be able to use the TLB 2743 * for the accesses done as part of a stage 1 page table walk, rather than 2744 * having to walk the stage 2 page table over and over.) 2745 * 2746 * R profile CPUs have an MPU, but can use the same set of MMU indexes 2747 * as A profile. They only need to distinguish NS EL0 and NS EL1 (and 2748 * NS EL2 if we ever model a Cortex-R52). 2749 * 2750 * M profile CPUs are rather different as they do not have a true MMU. 2751 * They have the following different MMU indexes: 2752 * User 2753 * Privileged 2754 * User, execution priority negative (ie the MPU HFNMIENA bit may apply) 2755 * Privileged, execution priority negative (ditto) 2756 * If the CPU supports the v8M Security Extension then there are also: 2757 * Secure User 2758 * Secure Privileged 2759 * Secure User, execution priority negative 2760 * Secure Privileged, execution priority negative 2761 * 2762 * The ARMMMUIdx and the mmu index value used by the core QEMU TLB code 2763 * are not quite the same -- different CPU types (most notably M profile 2764 * vs A/R profile) would like to use MMU indexes with different semantics, 2765 * but since we don't ever need to use all of those in a single CPU we 2766 * can avoid setting NB_MMU_MODES to more than 8. The lower bits of 2767 * ARMMMUIdx are the core TLB mmu index, and the higher bits are always 2768 * the same for any particular CPU. 2769 * Variables of type ARMMUIdx are always full values, and the core 2770 * index values are in variables of type 'int'. 2771 * 2772 * Our enumeration includes at the end some entries which are not "true" 2773 * mmu_idx values in that they don't have corresponding TLBs and are only 2774 * valid for doing slow path page table walks. 2775 * 2776 * The constant names here are patterned after the general style of the names 2777 * of the AT/ATS operations. 2778 * The values used are carefully arranged to make mmu_idx => EL lookup easy. 2779 * For M profile we arrange them to have a bit for priv, a bit for negpri 2780 * and a bit for secure. 2781 */ 2782 #define ARM_MMU_IDX_A 0x10 /* A profile */ 2783 #define ARM_MMU_IDX_NOTLB 0x20 /* does not have a TLB */ 2784 #define ARM_MMU_IDX_M 0x40 /* M profile */ 2785 2786 /* meanings of the bits for M profile mmu idx values */ 2787 #define ARM_MMU_IDX_M_PRIV 0x1 2788 #define ARM_MMU_IDX_M_NEGPRI 0x2 2789 #define ARM_MMU_IDX_M_S 0x4 2790 2791 #define ARM_MMU_IDX_TYPE_MASK (~0x7) 2792 #define ARM_MMU_IDX_COREIDX_MASK 0x7 2793 2794 typedef enum ARMMMUIdx { 2795 ARMMMUIdx_S12NSE0 = 0 | ARM_MMU_IDX_A, 2796 ARMMMUIdx_S12NSE1 = 1 | ARM_MMU_IDX_A, 2797 ARMMMUIdx_S1E2 = 2 | ARM_MMU_IDX_A, 2798 ARMMMUIdx_S1E3 = 3 | ARM_MMU_IDX_A, 2799 ARMMMUIdx_S1SE0 = 4 | ARM_MMU_IDX_A, 2800 ARMMMUIdx_S1SE1 = 5 | ARM_MMU_IDX_A, 2801 ARMMMUIdx_S2NS = 6 | ARM_MMU_IDX_A, 2802 ARMMMUIdx_MUser = 0 | ARM_MMU_IDX_M, 2803 ARMMMUIdx_MPriv = 1 | ARM_MMU_IDX_M, 2804 ARMMMUIdx_MUserNegPri = 2 | ARM_MMU_IDX_M, 2805 ARMMMUIdx_MPrivNegPri = 3 | ARM_MMU_IDX_M, 2806 ARMMMUIdx_MSUser = 4 | ARM_MMU_IDX_M, 2807 ARMMMUIdx_MSPriv = 5 | ARM_MMU_IDX_M, 2808 ARMMMUIdx_MSUserNegPri = 6 | ARM_MMU_IDX_M, 2809 ARMMMUIdx_MSPrivNegPri = 7 | ARM_MMU_IDX_M, 2810 /* Indexes below here don't have TLBs and are used only for AT system 2811 * instructions or for the first stage of an S12 page table walk. 2812 */ 2813 ARMMMUIdx_S1NSE0 = 0 | ARM_MMU_IDX_NOTLB, 2814 ARMMMUIdx_S1NSE1 = 1 | ARM_MMU_IDX_NOTLB, 2815 } ARMMMUIdx; 2816 2817 /* Bit macros for the core-mmu-index values for each index, 2818 * for use when calling tlb_flush_by_mmuidx() and friends. 2819 */ 2820 typedef enum ARMMMUIdxBit { 2821 ARMMMUIdxBit_S12NSE0 = 1 << 0, 2822 ARMMMUIdxBit_S12NSE1 = 1 << 1, 2823 ARMMMUIdxBit_S1E2 = 1 << 2, 2824 ARMMMUIdxBit_S1E3 = 1 << 3, 2825 ARMMMUIdxBit_S1SE0 = 1 << 4, 2826 ARMMMUIdxBit_S1SE1 = 1 << 5, 2827 ARMMMUIdxBit_S2NS = 1 << 6, 2828 ARMMMUIdxBit_MUser = 1 << 0, 2829 ARMMMUIdxBit_MPriv = 1 << 1, 2830 ARMMMUIdxBit_MUserNegPri = 1 << 2, 2831 ARMMMUIdxBit_MPrivNegPri = 1 << 3, 2832 ARMMMUIdxBit_MSUser = 1 << 4, 2833 ARMMMUIdxBit_MSPriv = 1 << 5, 2834 ARMMMUIdxBit_MSUserNegPri = 1 << 6, 2835 ARMMMUIdxBit_MSPrivNegPri = 1 << 7, 2836 } ARMMMUIdxBit; 2837 2838 #define MMU_USER_IDX 0 2839 2840 static inline int arm_to_core_mmu_idx(ARMMMUIdx mmu_idx) 2841 { 2842 return mmu_idx & ARM_MMU_IDX_COREIDX_MASK; 2843 } 2844 2845 static inline ARMMMUIdx core_to_arm_mmu_idx(CPUARMState *env, int mmu_idx) 2846 { 2847 if (arm_feature(env, ARM_FEATURE_M)) { 2848 return mmu_idx | ARM_MMU_IDX_M; 2849 } else { 2850 return mmu_idx | ARM_MMU_IDX_A; 2851 } 2852 } 2853 2854 /* Return the exception level we're running at if this is our mmu_idx */ 2855 static inline int arm_mmu_idx_to_el(ARMMMUIdx mmu_idx) 2856 { 2857 switch (mmu_idx & ARM_MMU_IDX_TYPE_MASK) { 2858 case ARM_MMU_IDX_A: 2859 return mmu_idx & 3; 2860 case ARM_MMU_IDX_M: 2861 return mmu_idx & ARM_MMU_IDX_M_PRIV; 2862 default: 2863 g_assert_not_reached(); 2864 } 2865 } 2866 2867 /* Return the MMU index for a v7M CPU in the specified security and 2868 * privilege state. 2869 */ 2870 ARMMMUIdx arm_v7m_mmu_idx_for_secstate_and_priv(CPUARMState *env, 2871 bool secstate, bool priv); 2872 2873 /* Return the MMU index for a v7M CPU in the specified security state */ 2874 ARMMMUIdx arm_v7m_mmu_idx_for_secstate(CPUARMState *env, bool secstate); 2875 2876 /** 2877 * cpu_mmu_index: 2878 * @env: The cpu environment 2879 * @ifetch: True for code access, false for data access. 2880 * 2881 * Return the core mmu index for the current translation regime. 2882 * This function is used by generic TCG code paths. 2883 */ 2884 int cpu_mmu_index(CPUARMState *env, bool ifetch); 2885 2886 /* Indexes used when registering address spaces with cpu_address_space_init */ 2887 typedef enum ARMASIdx { 2888 ARMASIdx_NS = 0, 2889 ARMASIdx_S = 1, 2890 } ARMASIdx; 2891 2892 /* Return the Exception Level targeted by debug exceptions. */ 2893 static inline int arm_debug_target_el(CPUARMState *env) 2894 { 2895 bool secure = arm_is_secure(env); 2896 bool route_to_el2 = false; 2897 2898 if (arm_feature(env, ARM_FEATURE_EL2) && !secure) { 2899 route_to_el2 = env->cp15.hcr_el2 & HCR_TGE || 2900 env->cp15.mdcr_el2 & MDCR_TDE; 2901 } 2902 2903 if (route_to_el2) { 2904 return 2; 2905 } else if (arm_feature(env, ARM_FEATURE_EL3) && 2906 !arm_el_is_aa64(env, 3) && secure) { 2907 return 3; 2908 } else { 2909 return 1; 2910 } 2911 } 2912 2913 static inline bool arm_v7m_csselr_razwi(ARMCPU *cpu) 2914 { 2915 /* If all the CLIDR.Ctypem bits are 0 there are no caches, and 2916 * CSSELR is RAZ/WI. 2917 */ 2918 return (cpu->clidr & R_V7M_CLIDR_CTYPE_ALL_MASK) != 0; 2919 } 2920 2921 /* See AArch64.GenerateDebugExceptionsFrom() in ARM ARM pseudocode */ 2922 static inline bool aa64_generate_debug_exceptions(CPUARMState *env) 2923 { 2924 int cur_el = arm_current_el(env); 2925 int debug_el; 2926 2927 if (cur_el == 3) { 2928 return false; 2929 } 2930 2931 /* MDCR_EL3.SDD disables debug events from Secure state */ 2932 if (arm_is_secure_below_el3(env) 2933 && extract32(env->cp15.mdcr_el3, 16, 1)) { 2934 return false; 2935 } 2936 2937 /* 2938 * Same EL to same EL debug exceptions need MDSCR_KDE enabled 2939 * while not masking the (D)ebug bit in DAIF. 2940 */ 2941 debug_el = arm_debug_target_el(env); 2942 2943 if (cur_el == debug_el) { 2944 return extract32(env->cp15.mdscr_el1, 13, 1) 2945 && !(env->daif & PSTATE_D); 2946 } 2947 2948 /* Otherwise the debug target needs to be a higher EL */ 2949 return debug_el > cur_el; 2950 } 2951 2952 static inline bool aa32_generate_debug_exceptions(CPUARMState *env) 2953 { 2954 int el = arm_current_el(env); 2955 2956 if (el == 0 && arm_el_is_aa64(env, 1)) { 2957 return aa64_generate_debug_exceptions(env); 2958 } 2959 2960 if (arm_is_secure(env)) { 2961 int spd; 2962 2963 if (el == 0 && (env->cp15.sder & 1)) { 2964 /* SDER.SUIDEN means debug exceptions from Secure EL0 2965 * are always enabled. Otherwise they are controlled by 2966 * SDCR.SPD like those from other Secure ELs. 2967 */ 2968 return true; 2969 } 2970 2971 spd = extract32(env->cp15.mdcr_el3, 14, 2); 2972 switch (spd) { 2973 case 1: 2974 /* SPD == 0b01 is reserved, but behaves as 0b00. */ 2975 case 0: 2976 /* For 0b00 we return true if external secure invasive debug 2977 * is enabled. On real hardware this is controlled by external 2978 * signals to the core. QEMU always permits debug, and behaves 2979 * as if DBGEN, SPIDEN, NIDEN and SPNIDEN are all tied high. 2980 */ 2981 return true; 2982 case 2: 2983 return false; 2984 case 3: 2985 return true; 2986 } 2987 } 2988 2989 return el != 2; 2990 } 2991 2992 /* Return true if debugging exceptions are currently enabled. 2993 * This corresponds to what in ARM ARM pseudocode would be 2994 * if UsingAArch32() then 2995 * return AArch32.GenerateDebugExceptions() 2996 * else 2997 * return AArch64.GenerateDebugExceptions() 2998 * We choose to push the if() down into this function for clarity, 2999 * since the pseudocode has it at all callsites except for the one in 3000 * CheckSoftwareStep(), where it is elided because both branches would 3001 * always return the same value. 3002 */ 3003 static inline bool arm_generate_debug_exceptions(CPUARMState *env) 3004 { 3005 if (env->aarch64) { 3006 return aa64_generate_debug_exceptions(env); 3007 } else { 3008 return aa32_generate_debug_exceptions(env); 3009 } 3010 } 3011 3012 /* Is single-stepping active? (Note that the "is EL_D AArch64?" check 3013 * implicitly means this always returns false in pre-v8 CPUs.) 3014 */ 3015 static inline bool arm_singlestep_active(CPUARMState *env) 3016 { 3017 return extract32(env->cp15.mdscr_el1, 0, 1) 3018 && arm_el_is_aa64(env, arm_debug_target_el(env)) 3019 && arm_generate_debug_exceptions(env); 3020 } 3021 3022 static inline bool arm_sctlr_b(CPUARMState *env) 3023 { 3024 return 3025 /* We need not implement SCTLR.ITD in user-mode emulation, so 3026 * let linux-user ignore the fact that it conflicts with SCTLR_B. 3027 * This lets people run BE32 binaries with "-cpu any". 3028 */ 3029 #ifndef CONFIG_USER_ONLY 3030 !arm_feature(env, ARM_FEATURE_V7) && 3031 #endif 3032 (env->cp15.sctlr_el[1] & SCTLR_B) != 0; 3033 } 3034 3035 static inline uint64_t arm_sctlr(CPUARMState *env, int el) 3036 { 3037 if (el == 0) { 3038 /* FIXME: ARMv8.1-VHE S2 translation regime. */ 3039 return env->cp15.sctlr_el[1]; 3040 } else { 3041 return env->cp15.sctlr_el[el]; 3042 } 3043 } 3044 3045 3046 /* Return true if the processor is in big-endian mode. */ 3047 static inline bool arm_cpu_data_is_big_endian(CPUARMState *env) 3048 { 3049 /* In 32bit endianness is determined by looking at CPSR's E bit */ 3050 if (!is_a64(env)) { 3051 return 3052 #ifdef CONFIG_USER_ONLY 3053 /* In system mode, BE32 is modelled in line with the 3054 * architecture (as word-invariant big-endianness), where loads 3055 * and stores are done little endian but from addresses which 3056 * are adjusted by XORing with the appropriate constant. So the 3057 * endianness to use for the raw data access is not affected by 3058 * SCTLR.B. 3059 * In user mode, however, we model BE32 as byte-invariant 3060 * big-endianness (because user-only code cannot tell the 3061 * difference), and so we need to use a data access endianness 3062 * that depends on SCTLR.B. 3063 */ 3064 arm_sctlr_b(env) || 3065 #endif 3066 ((env->uncached_cpsr & CPSR_E) ? 1 : 0); 3067 } else { 3068 int cur_el = arm_current_el(env); 3069 uint64_t sctlr = arm_sctlr(env, cur_el); 3070 3071 return (sctlr & (cur_el ? SCTLR_EE : SCTLR_E0E)) != 0; 3072 } 3073 } 3074 3075 #include "exec/cpu-all.h" 3076 3077 /* Bit usage in the TB flags field: bit 31 indicates whether we are 3078 * in 32 or 64 bit mode. The meaning of the other bits depends on that. 3079 * We put flags which are shared between 32 and 64 bit mode at the top 3080 * of the word, and flags which apply to only one mode at the bottom. 3081 */ 3082 FIELD(TBFLAG_ANY, AARCH64_STATE, 31, 1) 3083 FIELD(TBFLAG_ANY, MMUIDX, 28, 3) 3084 FIELD(TBFLAG_ANY, SS_ACTIVE, 27, 1) 3085 FIELD(TBFLAG_ANY, PSTATE_SS, 26, 1) 3086 /* Target EL if we take a floating-point-disabled exception */ 3087 FIELD(TBFLAG_ANY, FPEXC_EL, 24, 2) 3088 FIELD(TBFLAG_ANY, BE_DATA, 23, 1) 3089 3090 /* Bit usage when in AArch32 state: */ 3091 FIELD(TBFLAG_A32, THUMB, 0, 1) 3092 FIELD(TBFLAG_A32, VECLEN, 1, 3) 3093 FIELD(TBFLAG_A32, VECSTRIDE, 4, 2) 3094 FIELD(TBFLAG_A32, VFPEN, 7, 1) 3095 FIELD(TBFLAG_A32, CONDEXEC, 8, 8) 3096 FIELD(TBFLAG_A32, SCTLR_B, 16, 1) 3097 /* We store the bottom two bits of the CPAR as TB flags and handle 3098 * checks on the other bits at runtime 3099 */ 3100 FIELD(TBFLAG_A32, XSCALE_CPAR, 17, 2) 3101 /* Indicates whether cp register reads and writes by guest code should access 3102 * the secure or nonsecure bank of banked registers; note that this is not 3103 * the same thing as the current security state of the processor! 3104 */ 3105 FIELD(TBFLAG_A32, NS, 19, 1) 3106 /* For M profile only, Handler (ie not Thread) mode */ 3107 FIELD(TBFLAG_A32, HANDLER, 21, 1) 3108 /* For M profile only, whether we should generate stack-limit checks */ 3109 FIELD(TBFLAG_A32, STACKCHECK, 22, 1) 3110 3111 /* Bit usage when in AArch64 state */ 3112 FIELD(TBFLAG_A64, TBII, 0, 2) 3113 FIELD(TBFLAG_A64, SVEEXC_EL, 2, 2) 3114 FIELD(TBFLAG_A64, ZCR_LEN, 4, 4) 3115 FIELD(TBFLAG_A64, PAUTH_ACTIVE, 8, 1) 3116 FIELD(TBFLAG_A64, BT, 9, 1) 3117 FIELD(TBFLAG_A64, BTYPE, 10, 2) 3118 FIELD(TBFLAG_A64, TBID, 12, 2) 3119 3120 static inline bool bswap_code(bool sctlr_b) 3121 { 3122 #ifdef CONFIG_USER_ONLY 3123 /* BE8 (SCTLR.B = 0, TARGET_WORDS_BIGENDIAN = 1) is mixed endian. 3124 * The invalid combination SCTLR.B=1/CPSR.E=1/TARGET_WORDS_BIGENDIAN=0 3125 * would also end up as a mixed-endian mode with BE code, LE data. 3126 */ 3127 return 3128 #ifdef TARGET_WORDS_BIGENDIAN 3129 1 ^ 3130 #endif 3131 sctlr_b; 3132 #else 3133 /* All code access in ARM is little endian, and there are no loaders 3134 * doing swaps that need to be reversed 3135 */ 3136 return 0; 3137 #endif 3138 } 3139 3140 #ifdef CONFIG_USER_ONLY 3141 static inline bool arm_cpu_bswap_data(CPUARMState *env) 3142 { 3143 return 3144 #ifdef TARGET_WORDS_BIGENDIAN 3145 1 ^ 3146 #endif 3147 arm_cpu_data_is_big_endian(env); 3148 } 3149 #endif 3150 3151 void cpu_get_tb_cpu_state(CPUARMState *env, target_ulong *pc, 3152 target_ulong *cs_base, uint32_t *flags); 3153 3154 enum { 3155 QEMU_PSCI_CONDUIT_DISABLED = 0, 3156 QEMU_PSCI_CONDUIT_SMC = 1, 3157 QEMU_PSCI_CONDUIT_HVC = 2, 3158 }; 3159 3160 #ifndef CONFIG_USER_ONLY 3161 /* Return the address space index to use for a memory access */ 3162 static inline int arm_asidx_from_attrs(CPUState *cs, MemTxAttrs attrs) 3163 { 3164 return attrs.secure ? ARMASIdx_S : ARMASIdx_NS; 3165 } 3166 3167 /* Return the AddressSpace to use for a memory access 3168 * (which depends on whether the access is S or NS, and whether 3169 * the board gave us a separate AddressSpace for S accesses). 3170 */ 3171 static inline AddressSpace *arm_addressspace(CPUState *cs, MemTxAttrs attrs) 3172 { 3173 return cpu_get_address_space(cs, arm_asidx_from_attrs(cs, attrs)); 3174 } 3175 #endif 3176 3177 /** 3178 * arm_register_pre_el_change_hook: 3179 * Register a hook function which will be called immediately before this 3180 * CPU changes exception level or mode. The hook function will be 3181 * passed a pointer to the ARMCPU and the opaque data pointer passed 3182 * to this function when the hook was registered. 3183 * 3184 * Note that if a pre-change hook is called, any registered post-change hooks 3185 * are guaranteed to subsequently be called. 3186 */ 3187 void arm_register_pre_el_change_hook(ARMCPU *cpu, ARMELChangeHookFn *hook, 3188 void *opaque); 3189 /** 3190 * arm_register_el_change_hook: 3191 * Register a hook function which will be called immediately after this 3192 * CPU changes exception level or mode. The hook function will be 3193 * passed a pointer to the ARMCPU and the opaque data pointer passed 3194 * to this function when the hook was registered. 3195 * 3196 * Note that any registered hooks registered here are guaranteed to be called 3197 * if pre-change hooks have been. 3198 */ 3199 void arm_register_el_change_hook(ARMCPU *cpu, ARMELChangeHookFn *hook, void 3200 *opaque); 3201 3202 /** 3203 * aa32_vfp_dreg: 3204 * Return a pointer to the Dn register within env in 32-bit mode. 3205 */ 3206 static inline uint64_t *aa32_vfp_dreg(CPUARMState *env, unsigned regno) 3207 { 3208 return &env->vfp.zregs[regno >> 1].d[regno & 1]; 3209 } 3210 3211 /** 3212 * aa32_vfp_qreg: 3213 * Return a pointer to the Qn register within env in 32-bit mode. 3214 */ 3215 static inline uint64_t *aa32_vfp_qreg(CPUARMState *env, unsigned regno) 3216 { 3217 return &env->vfp.zregs[regno].d[0]; 3218 } 3219 3220 /** 3221 * aa64_vfp_qreg: 3222 * Return a pointer to the Qn register within env in 64-bit mode. 3223 */ 3224 static inline uint64_t *aa64_vfp_qreg(CPUARMState *env, unsigned regno) 3225 { 3226 return &env->vfp.zregs[regno].d[0]; 3227 } 3228 3229 /* Shared between translate-sve.c and sve_helper.c. */ 3230 extern const uint64_t pred_esz_masks[4]; 3231 3232 /* 3233 * 32-bit feature tests via id registers. 3234 */ 3235 static inline bool isar_feature_thumb_div(const ARMISARegisters *id) 3236 { 3237 return FIELD_EX32(id->id_isar0, ID_ISAR0, DIVIDE) != 0; 3238 } 3239 3240 static inline bool isar_feature_arm_div(const ARMISARegisters *id) 3241 { 3242 return FIELD_EX32(id->id_isar0, ID_ISAR0, DIVIDE) > 1; 3243 } 3244 3245 static inline bool isar_feature_jazelle(const ARMISARegisters *id) 3246 { 3247 return FIELD_EX32(id->id_isar1, ID_ISAR1, JAZELLE) != 0; 3248 } 3249 3250 static inline bool isar_feature_aa32_aes(const ARMISARegisters *id) 3251 { 3252 return FIELD_EX32(id->id_isar5, ID_ISAR5, AES) != 0; 3253 } 3254 3255 static inline bool isar_feature_aa32_pmull(const ARMISARegisters *id) 3256 { 3257 return FIELD_EX32(id->id_isar5, ID_ISAR5, AES) > 1; 3258 } 3259 3260 static inline bool isar_feature_aa32_sha1(const ARMISARegisters *id) 3261 { 3262 return FIELD_EX32(id->id_isar5, ID_ISAR5, SHA1) != 0; 3263 } 3264 3265 static inline bool isar_feature_aa32_sha2(const ARMISARegisters *id) 3266 { 3267 return FIELD_EX32(id->id_isar5, ID_ISAR5, SHA2) != 0; 3268 } 3269 3270 static inline bool isar_feature_aa32_crc32(const ARMISARegisters *id) 3271 { 3272 return FIELD_EX32(id->id_isar5, ID_ISAR5, CRC32) != 0; 3273 } 3274 3275 static inline bool isar_feature_aa32_rdm(const ARMISARegisters *id) 3276 { 3277 return FIELD_EX32(id->id_isar5, ID_ISAR5, RDM) != 0; 3278 } 3279 3280 static inline bool isar_feature_aa32_vcma(const ARMISARegisters *id) 3281 { 3282 return FIELD_EX32(id->id_isar5, ID_ISAR5, VCMA) != 0; 3283 } 3284 3285 static inline bool isar_feature_aa32_jscvt(const ARMISARegisters *id) 3286 { 3287 return FIELD_EX32(id->id_isar6, ID_ISAR6, JSCVT) != 0; 3288 } 3289 3290 static inline bool isar_feature_aa32_dp(const ARMISARegisters *id) 3291 { 3292 return FIELD_EX32(id->id_isar6, ID_ISAR6, DP) != 0; 3293 } 3294 3295 static inline bool isar_feature_aa32_fhm(const ARMISARegisters *id) 3296 { 3297 return FIELD_EX32(id->id_isar6, ID_ISAR6, FHM) != 0; 3298 } 3299 3300 static inline bool isar_feature_aa32_sb(const ARMISARegisters *id) 3301 { 3302 return FIELD_EX32(id->id_isar6, ID_ISAR6, SB) != 0; 3303 } 3304 3305 static inline bool isar_feature_aa32_predinv(const ARMISARegisters *id) 3306 { 3307 return FIELD_EX32(id->id_isar6, ID_ISAR6, SPECRES) != 0; 3308 } 3309 3310 static inline bool isar_feature_aa32_fp16_arith(const ARMISARegisters *id) 3311 { 3312 /* 3313 * This is a placeholder for use by VCMA until the rest of 3314 * the ARMv8.2-FP16 extension is implemented for aa32 mode. 3315 * At which point we can properly set and check MVFR1.FPHP. 3316 */ 3317 return FIELD_EX64(id->id_aa64pfr0, ID_AA64PFR0, FP) == 1; 3318 } 3319 3320 /* 3321 * We always set the FP and SIMD FP16 fields to indicate identical 3322 * levels of support (assuming SIMD is implemented at all), so 3323 * we only need one set of accessors. 3324 */ 3325 static inline bool isar_feature_aa32_fp16_spconv(const ARMISARegisters *id) 3326 { 3327 return FIELD_EX64(id->mvfr1, MVFR1, FPHP) > 0; 3328 } 3329 3330 static inline bool isar_feature_aa32_fp16_dpconv(const ARMISARegisters *id) 3331 { 3332 return FIELD_EX64(id->mvfr1, MVFR1, FPHP) > 1; 3333 } 3334 3335 static inline bool isar_feature_aa32_vsel(const ARMISARegisters *id) 3336 { 3337 return FIELD_EX64(id->mvfr2, MVFR2, FPMISC) >= 1; 3338 } 3339 3340 static inline bool isar_feature_aa32_vcvt_dr(const ARMISARegisters *id) 3341 { 3342 return FIELD_EX64(id->mvfr2, MVFR2, FPMISC) >= 2; 3343 } 3344 3345 static inline bool isar_feature_aa32_vrint(const ARMISARegisters *id) 3346 { 3347 return FIELD_EX64(id->mvfr2, MVFR2, FPMISC) >= 3; 3348 } 3349 3350 static inline bool isar_feature_aa32_vminmaxnm(const ARMISARegisters *id) 3351 { 3352 return FIELD_EX64(id->mvfr2, MVFR2, FPMISC) >= 4; 3353 } 3354 3355 /* 3356 * 64-bit feature tests via id registers. 3357 */ 3358 static inline bool isar_feature_aa64_aes(const ARMISARegisters *id) 3359 { 3360 return FIELD_EX64(id->id_aa64isar0, ID_AA64ISAR0, AES) != 0; 3361 } 3362 3363 static inline bool isar_feature_aa64_pmull(const ARMISARegisters *id) 3364 { 3365 return FIELD_EX64(id->id_aa64isar0, ID_AA64ISAR0, AES) > 1; 3366 } 3367 3368 static inline bool isar_feature_aa64_sha1(const ARMISARegisters *id) 3369 { 3370 return FIELD_EX64(id->id_aa64isar0, ID_AA64ISAR0, SHA1) != 0; 3371 } 3372 3373 static inline bool isar_feature_aa64_sha256(const ARMISARegisters *id) 3374 { 3375 return FIELD_EX64(id->id_aa64isar0, ID_AA64ISAR0, SHA2) != 0; 3376 } 3377 3378 static inline bool isar_feature_aa64_sha512(const ARMISARegisters *id) 3379 { 3380 return FIELD_EX64(id->id_aa64isar0, ID_AA64ISAR0, SHA2) > 1; 3381 } 3382 3383 static inline bool isar_feature_aa64_crc32(const ARMISARegisters *id) 3384 { 3385 return FIELD_EX64(id->id_aa64isar0, ID_AA64ISAR0, CRC32) != 0; 3386 } 3387 3388 static inline bool isar_feature_aa64_atomics(const ARMISARegisters *id) 3389 { 3390 return FIELD_EX64(id->id_aa64isar0, ID_AA64ISAR0, ATOMIC) != 0; 3391 } 3392 3393 static inline bool isar_feature_aa64_rdm(const ARMISARegisters *id) 3394 { 3395 return FIELD_EX64(id->id_aa64isar0, ID_AA64ISAR0, RDM) != 0; 3396 } 3397 3398 static inline bool isar_feature_aa64_sha3(const ARMISARegisters *id) 3399 { 3400 return FIELD_EX64(id->id_aa64isar0, ID_AA64ISAR0, SHA3) != 0; 3401 } 3402 3403 static inline bool isar_feature_aa64_sm3(const ARMISARegisters *id) 3404 { 3405 return FIELD_EX64(id->id_aa64isar0, ID_AA64ISAR0, SM3) != 0; 3406 } 3407 3408 static inline bool isar_feature_aa64_sm4(const ARMISARegisters *id) 3409 { 3410 return FIELD_EX64(id->id_aa64isar0, ID_AA64ISAR0, SM4) != 0; 3411 } 3412 3413 static inline bool isar_feature_aa64_dp(const ARMISARegisters *id) 3414 { 3415 return FIELD_EX64(id->id_aa64isar0, ID_AA64ISAR0, DP) != 0; 3416 } 3417 3418 static inline bool isar_feature_aa64_fhm(const ARMISARegisters *id) 3419 { 3420 return FIELD_EX64(id->id_aa64isar0, ID_AA64ISAR0, FHM) != 0; 3421 } 3422 3423 static inline bool isar_feature_aa64_condm_4(const ARMISARegisters *id) 3424 { 3425 return FIELD_EX64(id->id_aa64isar0, ID_AA64ISAR0, TS) != 0; 3426 } 3427 3428 static inline bool isar_feature_aa64_condm_5(const ARMISARegisters *id) 3429 { 3430 return FIELD_EX64(id->id_aa64isar0, ID_AA64ISAR0, TS) >= 2; 3431 } 3432 3433 static inline bool isar_feature_aa64_jscvt(const ARMISARegisters *id) 3434 { 3435 return FIELD_EX64(id->id_aa64isar1, ID_AA64ISAR1, JSCVT) != 0; 3436 } 3437 3438 static inline bool isar_feature_aa64_fcma(const ARMISARegisters *id) 3439 { 3440 return FIELD_EX64(id->id_aa64isar1, ID_AA64ISAR1, FCMA) != 0; 3441 } 3442 3443 static inline bool isar_feature_aa64_pauth(const ARMISARegisters *id) 3444 { 3445 /* 3446 * Note that while QEMU will only implement the architected algorithm 3447 * QARMA, and thus APA+GPA, the host cpu for kvm may use implementation 3448 * defined algorithms, and thus API+GPI, and this predicate controls 3449 * migration of the 128-bit keys. 3450 */ 3451 return (id->id_aa64isar1 & 3452 (FIELD_DP64(0, ID_AA64ISAR1, APA, 0xf) | 3453 FIELD_DP64(0, ID_AA64ISAR1, API, 0xf) | 3454 FIELD_DP64(0, ID_AA64ISAR1, GPA, 0xf) | 3455 FIELD_DP64(0, ID_AA64ISAR1, GPI, 0xf))) != 0; 3456 } 3457 3458 static inline bool isar_feature_aa64_sb(const ARMISARegisters *id) 3459 { 3460 return FIELD_EX64(id->id_aa64isar1, ID_AA64ISAR1, SB) != 0; 3461 } 3462 3463 static inline bool isar_feature_aa64_predinv(const ARMISARegisters *id) 3464 { 3465 return FIELD_EX64(id->id_aa64isar1, ID_AA64ISAR1, SPECRES) != 0; 3466 } 3467 3468 static inline bool isar_feature_aa64_frint(const ARMISARegisters *id) 3469 { 3470 return FIELD_EX64(id->id_aa64isar1, ID_AA64ISAR1, FRINTTS) != 0; 3471 } 3472 3473 static inline bool isar_feature_aa64_fp16(const ARMISARegisters *id) 3474 { 3475 /* We always set the AdvSIMD and FP fields identically wrt FP16. */ 3476 return FIELD_EX64(id->id_aa64pfr0, ID_AA64PFR0, FP) == 1; 3477 } 3478 3479 static inline bool isar_feature_aa64_aa32(const ARMISARegisters *id) 3480 { 3481 return FIELD_EX64(id->id_aa64pfr0, ID_AA64PFR0, EL0) >= 2; 3482 } 3483 3484 static inline bool isar_feature_aa64_sve(const ARMISARegisters *id) 3485 { 3486 return FIELD_EX64(id->id_aa64pfr0, ID_AA64PFR0, SVE) != 0; 3487 } 3488 3489 static inline bool isar_feature_aa64_lor(const ARMISARegisters *id) 3490 { 3491 return FIELD_EX64(id->id_aa64mmfr1, ID_AA64MMFR1, LO) != 0; 3492 } 3493 3494 static inline bool isar_feature_aa64_bti(const ARMISARegisters *id) 3495 { 3496 return FIELD_EX64(id->id_aa64pfr1, ID_AA64PFR1, BT) != 0; 3497 } 3498 3499 /* 3500 * Forward to the above feature tests given an ARMCPU pointer. 3501 */ 3502 #define cpu_isar_feature(name, cpu) \ 3503 ({ ARMCPU *cpu_ = (cpu); isar_feature_##name(&cpu_->isar); }) 3504 3505 #endif 3506