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 usees 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 CPUNegativeOffsetState neg; 267 CPUAlphaState env; 268 269 /* This alarm doesn't exist in real hardware; we wish it did. */ 270 QEMUTimer *alarm_timer; 271 }; 272 273 274 #ifndef CONFIG_USER_ONLY 275 extern const VMStateDescription vmstate_alpha_cpu; 276 277 void alpha_cpu_do_interrupt(CPUState *cpu); 278 bool alpha_cpu_exec_interrupt(CPUState *cpu, int int_req); 279 #endif /* !CONFIG_USER_ONLY */ 280 void alpha_cpu_dump_state(CPUState *cs, FILE *f, int flags); 281 hwaddr alpha_cpu_get_phys_page_debug(CPUState *cpu, vaddr addr); 282 int alpha_cpu_gdb_read_register(CPUState *cpu, GByteArray *buf, int reg); 283 int alpha_cpu_gdb_write_register(CPUState *cpu, uint8_t *buf, int reg); 284 285 #define cpu_list alpha_cpu_list 286 287 #include "exec/cpu-all.h" 288 289 enum { 290 FEATURE_ASN = 0x00000001, 291 FEATURE_SPS = 0x00000002, 292 FEATURE_VIRBND = 0x00000004, 293 FEATURE_TBCHK = 0x00000008, 294 }; 295 296 enum { 297 EXCP_RESET, 298 EXCP_MCHK, 299 EXCP_SMP_INTERRUPT, 300 EXCP_CLK_INTERRUPT, 301 EXCP_DEV_INTERRUPT, 302 EXCP_MMFAULT, 303 EXCP_UNALIGN, 304 EXCP_OPCDEC, 305 EXCP_ARITH, 306 EXCP_FEN, 307 EXCP_CALL_PAL, 308 }; 309 310 /* Alpha-specific interrupt pending bits. */ 311 #define CPU_INTERRUPT_TIMER CPU_INTERRUPT_TGT_EXT_0 312 #define CPU_INTERRUPT_SMP CPU_INTERRUPT_TGT_EXT_1 313 #define CPU_INTERRUPT_MCHK CPU_INTERRUPT_TGT_EXT_2 314 315 /* OSF/1 Page table bits. */ 316 enum { 317 PTE_VALID = 0x0001, 318 PTE_FOR = 0x0002, /* used for page protection (fault on read) */ 319 PTE_FOW = 0x0004, /* used for page protection (fault on write) */ 320 PTE_FOE = 0x0008, /* used for page protection (fault on exec) */ 321 PTE_ASM = 0x0010, 322 PTE_KRE = 0x0100, 323 PTE_URE = 0x0200, 324 PTE_KWE = 0x1000, 325 PTE_UWE = 0x2000 326 }; 327 328 /* Hardware interrupt (entInt) constants. */ 329 enum { 330 INT_K_IP, 331 INT_K_CLK, 332 INT_K_MCHK, 333 INT_K_DEV, 334 INT_K_PERF, 335 }; 336 337 /* Memory management (entMM) constants. */ 338 enum { 339 MM_K_TNV, 340 MM_K_ACV, 341 MM_K_FOR, 342 MM_K_FOE, 343 MM_K_FOW 344 }; 345 346 /* Arithmetic exception (entArith) constants. */ 347 enum { 348 EXC_M_SWC = 1, /* Software completion */ 349 EXC_M_INV = 2, /* Invalid operation */ 350 EXC_M_DZE = 4, /* Division by zero */ 351 EXC_M_FOV = 8, /* Overflow */ 352 EXC_M_UNF = 16, /* Underflow */ 353 EXC_M_INE = 32, /* Inexact result */ 354 EXC_M_IOV = 64 /* Integer Overflow */ 355 }; 356 357 /* Processor status constants. */ 358 /* Low 3 bits are interrupt mask level. */ 359 #define PS_INT_MASK 7u 360 361 /* Bits 4 and 5 are the mmu mode. The VMS PALcode uses all 4 modes; 362 The Unix PALcode only uses bit 4. */ 363 #define PS_USER_MODE 8u 364 365 /* CPUAlphaState->flags constants. These are layed out so that we 366 can set or reset the pieces individually by assigning to the byte, 367 or manipulated as a whole. */ 368 369 #define ENV_FLAG_PAL_SHIFT 0 370 #define ENV_FLAG_PS_SHIFT 8 371 #define ENV_FLAG_RX_SHIFT 16 372 #define ENV_FLAG_FEN_SHIFT 24 373 374 #define ENV_FLAG_PAL_MODE (1u << ENV_FLAG_PAL_SHIFT) 375 #define ENV_FLAG_PS_USER (PS_USER_MODE << ENV_FLAG_PS_SHIFT) 376 #define ENV_FLAG_RX_FLAG (1u << ENV_FLAG_RX_SHIFT) 377 #define ENV_FLAG_FEN (1u << ENV_FLAG_FEN_SHIFT) 378 379 #define ENV_FLAG_TB_MASK \ 380 (ENV_FLAG_PAL_MODE | ENV_FLAG_PS_USER | ENV_FLAG_FEN) 381 382 #define TB_FLAG_UNALIGN (1u << 1) 383 384 static inline int cpu_mmu_index(CPUAlphaState *env, bool ifetch) 385 { 386 int ret = env->flags & ENV_FLAG_PS_USER ? MMU_USER_IDX : MMU_KERNEL_IDX; 387 if (env->flags & ENV_FLAG_PAL_MODE) { 388 ret = MMU_KERNEL_IDX; 389 } 390 return ret; 391 } 392 393 enum { 394 IR_V0 = 0, 395 IR_T0 = 1, 396 IR_T1 = 2, 397 IR_T2 = 3, 398 IR_T3 = 4, 399 IR_T4 = 5, 400 IR_T5 = 6, 401 IR_T6 = 7, 402 IR_T7 = 8, 403 IR_S0 = 9, 404 IR_S1 = 10, 405 IR_S2 = 11, 406 IR_S3 = 12, 407 IR_S4 = 13, 408 IR_S5 = 14, 409 IR_S6 = 15, 410 IR_FP = IR_S6, 411 IR_A0 = 16, 412 IR_A1 = 17, 413 IR_A2 = 18, 414 IR_A3 = 19, 415 IR_A4 = 20, 416 IR_A5 = 21, 417 IR_T8 = 22, 418 IR_T9 = 23, 419 IR_T10 = 24, 420 IR_T11 = 25, 421 IR_RA = 26, 422 IR_T12 = 27, 423 IR_PV = IR_T12, 424 IR_AT = 28, 425 IR_GP = 29, 426 IR_SP = 30, 427 IR_ZERO = 31, 428 }; 429 430 void alpha_translate_init(void); 431 432 #define ALPHA_CPU_TYPE_SUFFIX "-" TYPE_ALPHA_CPU 433 #define ALPHA_CPU_TYPE_NAME(model) model ALPHA_CPU_TYPE_SUFFIX 434 #define CPU_RESOLVING_TYPE TYPE_ALPHA_CPU 435 436 void alpha_cpu_list(void); 437 G_NORETURN void dynamic_excp(CPUAlphaState *, uintptr_t, int, int); 438 G_NORETURN void arith_excp(CPUAlphaState *, uintptr_t, int, uint64_t); 439 440 uint64_t cpu_alpha_load_fpcr (CPUAlphaState *env); 441 void cpu_alpha_store_fpcr (CPUAlphaState *env, uint64_t val); 442 uint64_t cpu_alpha_load_gr(CPUAlphaState *env, unsigned reg); 443 void cpu_alpha_store_gr(CPUAlphaState *env, unsigned reg, uint64_t val); 444 445 #ifdef CONFIG_USER_ONLY 446 void alpha_cpu_record_sigsegv(CPUState *cs, vaddr address, 447 MMUAccessType access_type, 448 bool maperr, uintptr_t retaddr); 449 void alpha_cpu_record_sigbus(CPUState *cs, vaddr address, 450 MMUAccessType access_type, uintptr_t retaddr); 451 #else 452 bool alpha_cpu_tlb_fill(CPUState *cs, vaddr address, int size, 453 MMUAccessType access_type, int mmu_idx, 454 bool probe, uintptr_t retaddr); 455 G_NORETURN void alpha_cpu_do_unaligned_access(CPUState *cpu, vaddr addr, 456 MMUAccessType access_type, int mmu_idx, 457 uintptr_t retaddr); 458 void alpha_cpu_do_transaction_failed(CPUState *cs, hwaddr physaddr, 459 vaddr addr, unsigned size, 460 MMUAccessType access_type, 461 int mmu_idx, MemTxAttrs attrs, 462 MemTxResult response, uintptr_t retaddr); 463 #endif 464 465 static inline void cpu_get_tb_cpu_state(CPUAlphaState *env, target_ulong *pc, 466 target_ulong *cs_base, uint32_t *pflags) 467 { 468 *pc = env->pc; 469 *cs_base = 0; 470 *pflags = env->flags & ENV_FLAG_TB_MASK; 471 #ifdef CONFIG_USER_ONLY 472 *pflags |= TB_FLAG_UNALIGN * !env_cpu(env)->prctl_unalign_sigbus; 473 #endif 474 } 475 476 #ifdef CONFIG_USER_ONLY 477 /* Copied from linux ieee_swcr_to_fpcr. */ 478 static inline uint64_t alpha_ieee_swcr_to_fpcr(uint64_t swcr) 479 { 480 uint64_t fpcr = 0; 481 482 fpcr |= (swcr & SWCR_STATUS_MASK) << 35; 483 fpcr |= (swcr & SWCR_MAP_DMZ) << 36; 484 fpcr |= (~swcr & (SWCR_TRAP_ENABLE_INV 485 | SWCR_TRAP_ENABLE_DZE 486 | SWCR_TRAP_ENABLE_OVF)) << 48; 487 fpcr |= (~swcr & (SWCR_TRAP_ENABLE_UNF 488 | SWCR_TRAP_ENABLE_INE)) << 57; 489 fpcr |= (swcr & SWCR_MAP_UMZ ? FPCR_UNDZ | FPCR_UNFD : 0); 490 fpcr |= (~swcr & SWCR_TRAP_ENABLE_DNO) << 41; 491 492 return fpcr; 493 } 494 495 /* Copied from linux ieee_fpcr_to_swcr. */ 496 static inline uint64_t alpha_ieee_fpcr_to_swcr(uint64_t fpcr) 497 { 498 uint64_t swcr = 0; 499 500 swcr |= (fpcr >> 35) & SWCR_STATUS_MASK; 501 swcr |= (fpcr >> 36) & SWCR_MAP_DMZ; 502 swcr |= (~fpcr >> 48) & (SWCR_TRAP_ENABLE_INV 503 | SWCR_TRAP_ENABLE_DZE 504 | SWCR_TRAP_ENABLE_OVF); 505 swcr |= (~fpcr >> 57) & (SWCR_TRAP_ENABLE_UNF | SWCR_TRAP_ENABLE_INE); 506 swcr |= (fpcr >> 47) & SWCR_MAP_UMZ; 507 swcr |= (~fpcr >> 41) & SWCR_TRAP_ENABLE_DNO; 508 509 return swcr; 510 } 511 #endif /* CONFIG_USER_ONLY */ 512 513 #endif /* ALPHA_CPU_H */ 514