1 /* 2 * Alpha emulation cpu definitions for qemu. 3 * 4 * Copyright (c) 2007 Jocelyn Mayer 5 * 6 * This library is free software; you can redistribute it and/or 7 * modify it under the terms of the GNU Lesser General Public 8 * License as published by the Free Software Foundation; either 9 * version 2.1 of the License, or (at your option) any later version. 10 * 11 * This library is distributed in the hope that it will be useful, 12 * but WITHOUT ANY WARRANTY; without even the implied warranty of 13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 14 * Lesser General Public License for more details. 15 * 16 * You should have received a copy of the GNU Lesser General Public 17 * License along with this library; if not, see <http://www.gnu.org/licenses/>. 18 */ 19 20 #ifndef ALPHA_CPU_H 21 #define ALPHA_CPU_H 22 23 #include "cpu-qom.h" 24 #include "exec/cpu-defs.h" 25 26 /* Alpha processors have a weak memory model */ 27 #define TCG_GUEST_DEFAULT_MO (0) 28 29 #define ICACHE_LINE_SIZE 32 30 #define DCACHE_LINE_SIZE 32 31 32 /* Alpha major type */ 33 enum { 34 ALPHA_EV3 = 1, 35 ALPHA_EV4 = 2, 36 ALPHA_SIM = 3, 37 ALPHA_LCA = 4, 38 ALPHA_EV5 = 5, /* 21164 */ 39 ALPHA_EV45 = 6, /* 21064A */ 40 ALPHA_EV56 = 7, /* 21164A */ 41 }; 42 43 /* EV4 minor type */ 44 enum { 45 ALPHA_EV4_2 = 0, 46 ALPHA_EV4_3 = 1, 47 }; 48 49 /* LCA minor type */ 50 enum { 51 ALPHA_LCA_1 = 1, /* 21066 */ 52 ALPHA_LCA_2 = 2, /* 20166 */ 53 ALPHA_LCA_3 = 3, /* 21068 */ 54 ALPHA_LCA_4 = 4, /* 21068 */ 55 ALPHA_LCA_5 = 5, /* 21066A */ 56 ALPHA_LCA_6 = 6, /* 21068A */ 57 }; 58 59 /* EV5 minor type */ 60 enum { 61 ALPHA_EV5_1 = 1, /* Rev BA, CA */ 62 ALPHA_EV5_2 = 2, /* Rev DA, EA */ 63 ALPHA_EV5_3 = 3, /* Pass 3 */ 64 ALPHA_EV5_4 = 4, /* Pass 3.2 */ 65 ALPHA_EV5_5 = 5, /* Pass 4 */ 66 }; 67 68 /* EV45 minor type */ 69 enum { 70 ALPHA_EV45_1 = 1, /* Pass 1 */ 71 ALPHA_EV45_2 = 2, /* Pass 1.1 */ 72 ALPHA_EV45_3 = 3, /* Pass 2 */ 73 }; 74 75 /* EV56 minor type */ 76 enum { 77 ALPHA_EV56_1 = 1, /* Pass 1 */ 78 ALPHA_EV56_2 = 2, /* Pass 2 */ 79 }; 80 81 enum { 82 IMPLVER_2106x = 0, /* EV4, EV45 & LCA45 */ 83 IMPLVER_21164 = 1, /* EV5, EV56 & PCA45 */ 84 IMPLVER_21264 = 2, /* EV6, EV67 & EV68x */ 85 IMPLVER_21364 = 3, /* EV7 & EV79 */ 86 }; 87 88 enum { 89 AMASK_BWX = 0x00000001, 90 AMASK_FIX = 0x00000002, 91 AMASK_CIX = 0x00000004, 92 AMASK_MVI = 0x00000100, 93 AMASK_TRAP = 0x00000200, 94 AMASK_PREFETCH = 0x00001000, 95 }; 96 97 enum { 98 VAX_ROUND_NORMAL = 0, 99 VAX_ROUND_CHOPPED, 100 }; 101 102 enum { 103 IEEE_ROUND_NORMAL = 0, 104 IEEE_ROUND_DYNAMIC, 105 IEEE_ROUND_PLUS, 106 IEEE_ROUND_MINUS, 107 IEEE_ROUND_CHOPPED, 108 }; 109 110 /* IEEE floating-point operations encoding */ 111 /* Trap mode */ 112 enum { 113 FP_TRAP_I = 0x0, 114 FP_TRAP_U = 0x1, 115 FP_TRAP_S = 0x4, 116 FP_TRAP_SU = 0x5, 117 FP_TRAP_SUI = 0x7, 118 }; 119 120 /* Rounding mode */ 121 enum { 122 FP_ROUND_CHOPPED = 0x0, 123 FP_ROUND_MINUS = 0x1, 124 FP_ROUND_NORMAL = 0x2, 125 FP_ROUND_DYNAMIC = 0x3, 126 }; 127 128 /* FPCR bits -- right-shifted 32 so we can use a uint32_t. */ 129 #define FPCR_SUM (1U << (63 - 32)) 130 #define FPCR_INED (1U << (62 - 32)) 131 #define FPCR_UNFD (1U << (61 - 32)) 132 #define FPCR_UNDZ (1U << (60 - 32)) 133 #define FPCR_DYN_SHIFT (58 - 32) 134 #define FPCR_DYN_CHOPPED (0U << FPCR_DYN_SHIFT) 135 #define FPCR_DYN_MINUS (1U << FPCR_DYN_SHIFT) 136 #define FPCR_DYN_NORMAL (2U << FPCR_DYN_SHIFT) 137 #define FPCR_DYN_PLUS (3U << FPCR_DYN_SHIFT) 138 #define FPCR_DYN_MASK (3U << FPCR_DYN_SHIFT) 139 #define FPCR_IOV (1U << (57 - 32)) 140 #define FPCR_INE (1U << (56 - 32)) 141 #define FPCR_UNF (1U << (55 - 32)) 142 #define FPCR_OVF (1U << (54 - 32)) 143 #define FPCR_DZE (1U << (53 - 32)) 144 #define FPCR_INV (1U << (52 - 32)) 145 #define FPCR_OVFD (1U << (51 - 32)) 146 #define FPCR_DZED (1U << (50 - 32)) 147 #define FPCR_INVD (1U << (49 - 32)) 148 #define FPCR_DNZ (1U << (48 - 32)) 149 #define FPCR_DNOD (1U << (47 - 32)) 150 #define FPCR_STATUS_MASK (FPCR_IOV | FPCR_INE | FPCR_UNF \ 151 | FPCR_OVF | FPCR_DZE | FPCR_INV) 152 153 /* The silly software trap enables implemented by the kernel emulation. 154 These are more or less architecturally required, since the real hardware 155 has read-as-zero bits in the FPCR when the features aren't implemented. 156 For the purposes of QEMU, we pretend the FPCR can hold everything. */ 157 #define SWCR_TRAP_ENABLE_INV (1U << 1) 158 #define SWCR_TRAP_ENABLE_DZE (1U << 2) 159 #define SWCR_TRAP_ENABLE_OVF (1U << 3) 160 #define SWCR_TRAP_ENABLE_UNF (1U << 4) 161 #define SWCR_TRAP_ENABLE_INE (1U << 5) 162 #define SWCR_TRAP_ENABLE_DNO (1U << 6) 163 #define SWCR_TRAP_ENABLE_MASK ((1U << 7) - (1U << 1)) 164 165 #define SWCR_MAP_DMZ (1U << 12) 166 #define SWCR_MAP_UMZ (1U << 13) 167 #define SWCR_MAP_MASK (SWCR_MAP_DMZ | SWCR_MAP_UMZ) 168 169 #define SWCR_STATUS_INV (1U << 17) 170 #define SWCR_STATUS_DZE (1U << 18) 171 #define SWCR_STATUS_OVF (1U << 19) 172 #define SWCR_STATUS_UNF (1U << 20) 173 #define SWCR_STATUS_INE (1U << 21) 174 #define SWCR_STATUS_DNO (1U << 22) 175 #define SWCR_STATUS_MASK ((1U << 23) - (1U << 17)) 176 177 #define SWCR_STATUS_TO_EXCSUM_SHIFT 16 178 179 #define SWCR_MASK (SWCR_TRAP_ENABLE_MASK | SWCR_MAP_MASK | SWCR_STATUS_MASK) 180 181 /* MMU modes definitions */ 182 183 /* Alpha has 5 MMU modes: PALcode, Kernel, Executive, Supervisor, and User. 184 The Unix PALcode only exposes the kernel and user modes; presumably 185 executive and supervisor are used by VMS. 186 187 PALcode itself uses physical mode for code and kernel mode for data; 188 there are PALmode instructions that can access data via physical mode 189 or via an os-installed "alternate mode", which is one of the 4 above. 190 191 That said, we're only emulating Unix PALcode, and not attempting VMS, 192 so we don't need to implement Executive and Supervisor. QEMU's own 193 PALcode cheats and usees the KSEG mapping for its code+data rather than 194 physical addresses. */ 195 196 #define MMU_KERNEL_IDX 0 197 #define MMU_USER_IDX 1 198 #define MMU_PHYS_IDX 2 199 200 typedef struct CPUAlphaState CPUAlphaState; 201 202 struct CPUAlphaState { 203 uint64_t ir[31]; 204 float64 fir[31]; 205 uint64_t pc; 206 uint64_t unique; 207 uint64_t lock_addr; 208 uint64_t lock_value; 209 210 /* The FPCR, and disassembled portions thereof. */ 211 uint32_t fpcr; 212 #ifdef CONFIG_USER_ONLY 213 uint32_t swcr; 214 #endif 215 uint32_t fpcr_exc_enable; 216 float_status fp_status; 217 uint8_t fpcr_dyn_round; 218 uint8_t fpcr_flush_to_zero; 219 220 /* Mask of PALmode, Processor State et al. Most of this gets copied 221 into the TranslatorBlock flags and controls code generation. */ 222 uint32_t flags; 223 224 /* The high 32-bits of the processor cycle counter. */ 225 uint32_t pcc_ofs; 226 227 /* These pass data from the exception logic in the translator and 228 helpers to the OS entry point. This is used for both system 229 emulation and user-mode. */ 230 uint64_t trap_arg0; 231 uint64_t trap_arg1; 232 uint64_t trap_arg2; 233 234 #if !defined(CONFIG_USER_ONLY) 235 /* The internal data required by our emulation of the Unix PALcode. */ 236 uint64_t exc_addr; 237 uint64_t palbr; 238 uint64_t ptbr; 239 uint64_t vptptr; 240 uint64_t sysval; 241 uint64_t usp; 242 uint64_t shadow[8]; 243 uint64_t scratch[24]; 244 #endif 245 246 /* This alarm doesn't exist in real hardware; we wish it did. */ 247 uint64_t alarm_expire; 248 249 int error_code; 250 251 uint32_t features; 252 uint32_t amask; 253 int implver; 254 }; 255 256 /** 257 * AlphaCPU: 258 * @env: #CPUAlphaState 259 * 260 * An Alpha CPU. 261 */ 262 struct AlphaCPU { 263 /*< private >*/ 264 CPUState parent_obj; 265 /*< public >*/ 266 267 CPUNegativeOffsetState neg; 268 CPUAlphaState env; 269 270 /* This alarm doesn't exist in real hardware; we wish it did. */ 271 QEMUTimer *alarm_timer; 272 }; 273 274 275 #ifndef CONFIG_USER_ONLY 276 extern const VMStateDescription vmstate_alpha_cpu; 277 278 void alpha_cpu_do_interrupt(CPUState *cpu); 279 bool alpha_cpu_exec_interrupt(CPUState *cpu, int int_req); 280 #endif /* !CONFIG_USER_ONLY */ 281 void alpha_cpu_dump_state(CPUState *cs, FILE *f, int flags); 282 hwaddr alpha_cpu_get_phys_page_debug(CPUState *cpu, vaddr addr); 283 int alpha_cpu_gdb_read_register(CPUState *cpu, GByteArray *buf, int reg); 284 int alpha_cpu_gdb_write_register(CPUState *cpu, uint8_t *buf, int reg); 285 286 #define cpu_list alpha_cpu_list 287 288 typedef CPUAlphaState CPUArchState; 289 typedef AlphaCPU ArchCPU; 290 291 #include "exec/cpu-all.h" 292 293 enum { 294 FEATURE_ASN = 0x00000001, 295 FEATURE_SPS = 0x00000002, 296 FEATURE_VIRBND = 0x00000004, 297 FEATURE_TBCHK = 0x00000008, 298 }; 299 300 enum { 301 EXCP_RESET, 302 EXCP_MCHK, 303 EXCP_SMP_INTERRUPT, 304 EXCP_CLK_INTERRUPT, 305 EXCP_DEV_INTERRUPT, 306 EXCP_MMFAULT, 307 EXCP_UNALIGN, 308 EXCP_OPCDEC, 309 EXCP_ARITH, 310 EXCP_FEN, 311 EXCP_CALL_PAL, 312 }; 313 314 /* Alpha-specific interrupt pending bits. */ 315 #define CPU_INTERRUPT_TIMER CPU_INTERRUPT_TGT_EXT_0 316 #define CPU_INTERRUPT_SMP CPU_INTERRUPT_TGT_EXT_1 317 #define CPU_INTERRUPT_MCHK CPU_INTERRUPT_TGT_EXT_2 318 319 /* OSF/1 Page table bits. */ 320 enum { 321 PTE_VALID = 0x0001, 322 PTE_FOR = 0x0002, /* used for page protection (fault on read) */ 323 PTE_FOW = 0x0004, /* used for page protection (fault on write) */ 324 PTE_FOE = 0x0008, /* used for page protection (fault on exec) */ 325 PTE_ASM = 0x0010, 326 PTE_KRE = 0x0100, 327 PTE_URE = 0x0200, 328 PTE_KWE = 0x1000, 329 PTE_UWE = 0x2000 330 }; 331 332 /* Hardware interrupt (entInt) constants. */ 333 enum { 334 INT_K_IP, 335 INT_K_CLK, 336 INT_K_MCHK, 337 INT_K_DEV, 338 INT_K_PERF, 339 }; 340 341 /* Memory management (entMM) constants. */ 342 enum { 343 MM_K_TNV, 344 MM_K_ACV, 345 MM_K_FOR, 346 MM_K_FOE, 347 MM_K_FOW 348 }; 349 350 /* Arithmetic exception (entArith) constants. */ 351 enum { 352 EXC_M_SWC = 1, /* Software completion */ 353 EXC_M_INV = 2, /* Invalid operation */ 354 EXC_M_DZE = 4, /* Division by zero */ 355 EXC_M_FOV = 8, /* Overflow */ 356 EXC_M_UNF = 16, /* Underflow */ 357 EXC_M_INE = 32, /* Inexact result */ 358 EXC_M_IOV = 64 /* Integer Overflow */ 359 }; 360 361 /* Processor status constants. */ 362 /* Low 3 bits are interrupt mask level. */ 363 #define PS_INT_MASK 7u 364 365 /* Bits 4 and 5 are the mmu mode. The VMS PALcode uses all 4 modes; 366 The Unix PALcode only uses bit 4. */ 367 #define PS_USER_MODE 8u 368 369 /* CPUAlphaState->flags constants. These are layed out so that we 370 can set or reset the pieces individually by assigning to the byte, 371 or manipulated as a whole. */ 372 373 #define ENV_FLAG_PAL_SHIFT 0 374 #define ENV_FLAG_PS_SHIFT 8 375 #define ENV_FLAG_RX_SHIFT 16 376 #define ENV_FLAG_FEN_SHIFT 24 377 378 #define ENV_FLAG_PAL_MODE (1u << ENV_FLAG_PAL_SHIFT) 379 #define ENV_FLAG_PS_USER (PS_USER_MODE << ENV_FLAG_PS_SHIFT) 380 #define ENV_FLAG_RX_FLAG (1u << ENV_FLAG_RX_SHIFT) 381 #define ENV_FLAG_FEN (1u << ENV_FLAG_FEN_SHIFT) 382 383 #define ENV_FLAG_TB_MASK \ 384 (ENV_FLAG_PAL_MODE | ENV_FLAG_PS_USER | ENV_FLAG_FEN) 385 386 #define TB_FLAG_UNALIGN (1u << 1) 387 388 static inline int cpu_mmu_index(CPUAlphaState *env, bool ifetch) 389 { 390 int ret = env->flags & ENV_FLAG_PS_USER ? MMU_USER_IDX : MMU_KERNEL_IDX; 391 if (env->flags & ENV_FLAG_PAL_MODE) { 392 ret = MMU_KERNEL_IDX; 393 } 394 return ret; 395 } 396 397 enum { 398 IR_V0 = 0, 399 IR_T0 = 1, 400 IR_T1 = 2, 401 IR_T2 = 3, 402 IR_T3 = 4, 403 IR_T4 = 5, 404 IR_T5 = 6, 405 IR_T6 = 7, 406 IR_T7 = 8, 407 IR_S0 = 9, 408 IR_S1 = 10, 409 IR_S2 = 11, 410 IR_S3 = 12, 411 IR_S4 = 13, 412 IR_S5 = 14, 413 IR_S6 = 15, 414 IR_FP = IR_S6, 415 IR_A0 = 16, 416 IR_A1 = 17, 417 IR_A2 = 18, 418 IR_A3 = 19, 419 IR_A4 = 20, 420 IR_A5 = 21, 421 IR_T8 = 22, 422 IR_T9 = 23, 423 IR_T10 = 24, 424 IR_T11 = 25, 425 IR_RA = 26, 426 IR_T12 = 27, 427 IR_PV = IR_T12, 428 IR_AT = 28, 429 IR_GP = 29, 430 IR_SP = 30, 431 IR_ZERO = 31, 432 }; 433 434 void alpha_translate_init(void); 435 436 #define ALPHA_CPU_TYPE_SUFFIX "-" TYPE_ALPHA_CPU 437 #define ALPHA_CPU_TYPE_NAME(model) model ALPHA_CPU_TYPE_SUFFIX 438 #define CPU_RESOLVING_TYPE TYPE_ALPHA_CPU 439 440 void alpha_cpu_list(void); 441 void QEMU_NORETURN dynamic_excp(CPUAlphaState *, uintptr_t, int, int); 442 void QEMU_NORETURN arith_excp(CPUAlphaState *, uintptr_t, int, uint64_t); 443 444 uint64_t cpu_alpha_load_fpcr (CPUAlphaState *env); 445 void cpu_alpha_store_fpcr (CPUAlphaState *env, uint64_t val); 446 uint64_t cpu_alpha_load_gr(CPUAlphaState *env, unsigned reg); 447 void cpu_alpha_store_gr(CPUAlphaState *env, unsigned reg, uint64_t val); 448 449 #ifdef CONFIG_USER_ONLY 450 void alpha_cpu_record_sigsegv(CPUState *cs, vaddr address, 451 MMUAccessType access_type, 452 bool maperr, uintptr_t retaddr); 453 void alpha_cpu_record_sigbus(CPUState *cs, vaddr address, 454 MMUAccessType access_type, uintptr_t retaddr); 455 #else 456 bool alpha_cpu_tlb_fill(CPUState *cs, vaddr address, int size, 457 MMUAccessType access_type, int mmu_idx, 458 bool probe, uintptr_t retaddr); 459 void alpha_cpu_do_unaligned_access(CPUState *cpu, vaddr addr, 460 MMUAccessType access_type, int mmu_idx, 461 uintptr_t retaddr) QEMU_NORETURN; 462 void alpha_cpu_do_transaction_failed(CPUState *cs, hwaddr physaddr, 463 vaddr addr, unsigned size, 464 MMUAccessType access_type, 465 int mmu_idx, MemTxAttrs attrs, 466 MemTxResult response, uintptr_t retaddr); 467 #endif 468 469 static inline void cpu_get_tb_cpu_state(CPUAlphaState *env, target_ulong *pc, 470 target_ulong *cs_base, uint32_t *pflags) 471 { 472 *pc = env->pc; 473 *cs_base = 0; 474 *pflags = env->flags & ENV_FLAG_TB_MASK; 475 #ifdef CONFIG_USER_ONLY 476 *pflags |= TB_FLAG_UNALIGN * !env_cpu(env)->prctl_unalign_sigbus; 477 #endif 478 } 479 480 #ifdef CONFIG_USER_ONLY 481 /* Copied from linux ieee_swcr_to_fpcr. */ 482 static inline uint64_t alpha_ieee_swcr_to_fpcr(uint64_t swcr) 483 { 484 uint64_t fpcr = 0; 485 486 fpcr |= (swcr & SWCR_STATUS_MASK) << 35; 487 fpcr |= (swcr & SWCR_MAP_DMZ) << 36; 488 fpcr |= (~swcr & (SWCR_TRAP_ENABLE_INV 489 | SWCR_TRAP_ENABLE_DZE 490 | SWCR_TRAP_ENABLE_OVF)) << 48; 491 fpcr |= (~swcr & (SWCR_TRAP_ENABLE_UNF 492 | SWCR_TRAP_ENABLE_INE)) << 57; 493 fpcr |= (swcr & SWCR_MAP_UMZ ? FPCR_UNDZ | FPCR_UNFD : 0); 494 fpcr |= (~swcr & SWCR_TRAP_ENABLE_DNO) << 41; 495 496 return fpcr; 497 } 498 499 /* Copied from linux ieee_fpcr_to_swcr. */ 500 static inline uint64_t alpha_ieee_fpcr_to_swcr(uint64_t fpcr) 501 { 502 uint64_t swcr = 0; 503 504 swcr |= (fpcr >> 35) & SWCR_STATUS_MASK; 505 swcr |= (fpcr >> 36) & SWCR_MAP_DMZ; 506 swcr |= (~fpcr >> 48) & (SWCR_TRAP_ENABLE_INV 507 | SWCR_TRAP_ENABLE_DZE 508 | SWCR_TRAP_ENABLE_OVF); 509 swcr |= (~fpcr >> 57) & (SWCR_TRAP_ENABLE_UNF | SWCR_TRAP_ENABLE_INE); 510 swcr |= (fpcr >> 47) & SWCR_MAP_UMZ; 511 swcr |= (~fpcr >> 41) & SWCR_TRAP_ENABLE_DNO; 512 513 return swcr; 514 } 515 #endif /* CONFIG_USER_ONLY */ 516 517 #endif /* ALPHA_CPU_H */ 518