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