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 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 #define ALIGNED_ONLY 27 28 /* Alpha processors have a weak memory model */ 29 #define TCG_GUEST_DEFAULT_MO (0) 30 31 #define ICACHE_LINE_SIZE 32 32 #define DCACHE_LINE_SIZE 32 33 34 /* Alpha major type */ 35 enum { 36 ALPHA_EV3 = 1, 37 ALPHA_EV4 = 2, 38 ALPHA_SIM = 3, 39 ALPHA_LCA = 4, 40 ALPHA_EV5 = 5, /* 21164 */ 41 ALPHA_EV45 = 6, /* 21064A */ 42 ALPHA_EV56 = 7, /* 21164A */ 43 }; 44 45 /* EV4 minor type */ 46 enum { 47 ALPHA_EV4_2 = 0, 48 ALPHA_EV4_3 = 1, 49 }; 50 51 /* LCA minor type */ 52 enum { 53 ALPHA_LCA_1 = 1, /* 21066 */ 54 ALPHA_LCA_2 = 2, /* 20166 */ 55 ALPHA_LCA_3 = 3, /* 21068 */ 56 ALPHA_LCA_4 = 4, /* 21068 */ 57 ALPHA_LCA_5 = 5, /* 21066A */ 58 ALPHA_LCA_6 = 6, /* 21068A */ 59 }; 60 61 /* EV5 minor type */ 62 enum { 63 ALPHA_EV5_1 = 1, /* Rev BA, CA */ 64 ALPHA_EV5_2 = 2, /* Rev DA, EA */ 65 ALPHA_EV5_3 = 3, /* Pass 3 */ 66 ALPHA_EV5_4 = 4, /* Pass 3.2 */ 67 ALPHA_EV5_5 = 5, /* Pass 4 */ 68 }; 69 70 /* EV45 minor type */ 71 enum { 72 ALPHA_EV45_1 = 1, /* Pass 1 */ 73 ALPHA_EV45_2 = 2, /* Pass 1.1 */ 74 ALPHA_EV45_3 = 3, /* Pass 2 */ 75 }; 76 77 /* EV56 minor type */ 78 enum { 79 ALPHA_EV56_1 = 1, /* Pass 1 */ 80 ALPHA_EV56_2 = 2, /* Pass 2 */ 81 }; 82 83 enum { 84 IMPLVER_2106x = 0, /* EV4, EV45 & LCA45 */ 85 IMPLVER_21164 = 1, /* EV5, EV56 & PCA45 */ 86 IMPLVER_21264 = 2, /* EV6, EV67 & EV68x */ 87 IMPLVER_21364 = 3, /* EV7 & EV79 */ 88 }; 89 90 enum { 91 AMASK_BWX = 0x00000001, 92 AMASK_FIX = 0x00000002, 93 AMASK_CIX = 0x00000004, 94 AMASK_MVI = 0x00000100, 95 AMASK_TRAP = 0x00000200, 96 AMASK_PREFETCH = 0x00001000, 97 }; 98 99 enum { 100 VAX_ROUND_NORMAL = 0, 101 VAX_ROUND_CHOPPED, 102 }; 103 104 enum { 105 IEEE_ROUND_NORMAL = 0, 106 IEEE_ROUND_DYNAMIC, 107 IEEE_ROUND_PLUS, 108 IEEE_ROUND_MINUS, 109 IEEE_ROUND_CHOPPED, 110 }; 111 112 /* IEEE floating-point operations encoding */ 113 /* Trap mode */ 114 enum { 115 FP_TRAP_I = 0x0, 116 FP_TRAP_U = 0x1, 117 FP_TRAP_S = 0x4, 118 FP_TRAP_SU = 0x5, 119 FP_TRAP_SUI = 0x7, 120 }; 121 122 /* Rounding mode */ 123 enum { 124 FP_ROUND_CHOPPED = 0x0, 125 FP_ROUND_MINUS = 0x1, 126 FP_ROUND_NORMAL = 0x2, 127 FP_ROUND_DYNAMIC = 0x3, 128 }; 129 130 /* FPCR bits -- right-shifted 32 so we can use a uint32_t. */ 131 #define FPCR_SUM (1U << (63 - 32)) 132 #define FPCR_INED (1U << (62 - 32)) 133 #define FPCR_UNFD (1U << (61 - 32)) 134 #define FPCR_UNDZ (1U << (60 - 32)) 135 #define FPCR_DYN_SHIFT (58 - 32) 136 #define FPCR_DYN_CHOPPED (0U << FPCR_DYN_SHIFT) 137 #define FPCR_DYN_MINUS (1U << FPCR_DYN_SHIFT) 138 #define FPCR_DYN_NORMAL (2U << FPCR_DYN_SHIFT) 139 #define FPCR_DYN_PLUS (3U << FPCR_DYN_SHIFT) 140 #define FPCR_DYN_MASK (3U << FPCR_DYN_SHIFT) 141 #define FPCR_IOV (1U << (57 - 32)) 142 #define FPCR_INE (1U << (56 - 32)) 143 #define FPCR_UNF (1U << (55 - 32)) 144 #define FPCR_OVF (1U << (54 - 32)) 145 #define FPCR_DZE (1U << (53 - 32)) 146 #define FPCR_INV (1U << (52 - 32)) 147 #define FPCR_OVFD (1U << (51 - 32)) 148 #define FPCR_DZED (1U << (50 - 32)) 149 #define FPCR_INVD (1U << (49 - 32)) 150 #define FPCR_DNZ (1U << (48 - 32)) 151 #define FPCR_DNOD (1U << (47 - 32)) 152 #define FPCR_STATUS_MASK (FPCR_IOV | FPCR_INE | FPCR_UNF \ 153 | FPCR_OVF | FPCR_DZE | FPCR_INV) 154 155 /* The silly software trap enables implemented by the kernel emulation. 156 These are more or less architecturally required, since the real hardware 157 has read-as-zero bits in the FPCR when the features aren't implemented. 158 For the purposes of QEMU, we pretend the FPCR can hold everything. */ 159 #define SWCR_TRAP_ENABLE_INV (1U << 1) 160 #define SWCR_TRAP_ENABLE_DZE (1U << 2) 161 #define SWCR_TRAP_ENABLE_OVF (1U << 3) 162 #define SWCR_TRAP_ENABLE_UNF (1U << 4) 163 #define SWCR_TRAP_ENABLE_INE (1U << 5) 164 #define SWCR_TRAP_ENABLE_DNO (1U << 6) 165 #define SWCR_TRAP_ENABLE_MASK ((1U << 7) - (1U << 1)) 166 167 #define SWCR_MAP_DMZ (1U << 12) 168 #define SWCR_MAP_UMZ (1U << 13) 169 #define SWCR_MAP_MASK (SWCR_MAP_DMZ | SWCR_MAP_UMZ) 170 171 #define SWCR_STATUS_INV (1U << 17) 172 #define SWCR_STATUS_DZE (1U << 18) 173 #define SWCR_STATUS_OVF (1U << 19) 174 #define SWCR_STATUS_UNF (1U << 20) 175 #define SWCR_STATUS_INE (1U << 21) 176 #define SWCR_STATUS_DNO (1U << 22) 177 #define SWCR_STATUS_MASK ((1U << 23) - (1U << 17)) 178 179 #define SWCR_STATUS_TO_EXCSUM_SHIFT 16 180 181 #define SWCR_MASK (SWCR_TRAP_ENABLE_MASK | SWCR_MAP_MASK | SWCR_STATUS_MASK) 182 183 /* MMU modes definitions */ 184 185 /* Alpha has 5 MMU modes: PALcode, Kernel, Executive, Supervisor, and User. 186 The Unix PALcode only exposes the kernel and user modes; presumably 187 executive and supervisor are used by VMS. 188 189 PALcode itself uses physical mode for code and kernel mode for data; 190 there are PALmode instructions that can access data via physical mode 191 or via an os-installed "alternate mode", which is one of the 4 above. 192 193 That said, we're only emulating Unix PALcode, and not attempting VMS, 194 so we don't need to implement Executive and Supervisor. QEMU's own 195 PALcode cheats and usees the KSEG mapping for its code+data rather than 196 physical addresses. */ 197 198 #define MMU_MODE0_SUFFIX _kernel 199 #define MMU_MODE1_SUFFIX _user 200 #define MMU_KERNEL_IDX 0 201 #define MMU_USER_IDX 1 202 #define MMU_PHYS_IDX 2 203 204 typedef struct CPUAlphaState CPUAlphaState; 205 206 struct CPUAlphaState { 207 uint64_t ir[31]; 208 float64 fir[31]; 209 uint64_t pc; 210 uint64_t unique; 211 uint64_t lock_addr; 212 uint64_t lock_value; 213 214 /* The FPCR, and disassembled portions thereof. */ 215 uint32_t fpcr; 216 #ifdef CONFIG_USER_ONLY 217 uint32_t swcr; 218 #endif 219 uint32_t fpcr_exc_enable; 220 float_status fp_status; 221 uint8_t fpcr_dyn_round; 222 uint8_t fpcr_flush_to_zero; 223 224 /* Mask of PALmode, Processor State et al. Most of this gets copied 225 into the TranslatorBlock flags and controls code generation. */ 226 uint32_t flags; 227 228 /* The high 32-bits of the processor cycle counter. */ 229 uint32_t pcc_ofs; 230 231 /* These pass data from the exception logic in the translator and 232 helpers to the OS entry point. This is used for both system 233 emulation and user-mode. */ 234 uint64_t trap_arg0; 235 uint64_t trap_arg1; 236 uint64_t trap_arg2; 237 238 #if !defined(CONFIG_USER_ONLY) 239 /* The internal data required by our emulation of the Unix PALcode. */ 240 uint64_t exc_addr; 241 uint64_t palbr; 242 uint64_t ptbr; 243 uint64_t vptptr; 244 uint64_t sysval; 245 uint64_t usp; 246 uint64_t shadow[8]; 247 uint64_t scratch[24]; 248 #endif 249 250 /* This alarm doesn't exist in real hardware; we wish it did. */ 251 uint64_t alarm_expire; 252 253 int error_code; 254 255 uint32_t features; 256 uint32_t amask; 257 int implver; 258 }; 259 260 /** 261 * AlphaCPU: 262 * @env: #CPUAlphaState 263 * 264 * An Alpha CPU. 265 */ 266 struct AlphaCPU { 267 /*< private >*/ 268 CPUState parent_obj; 269 /*< public >*/ 270 271 CPUNegativeOffsetState neg; 272 CPUAlphaState env; 273 274 /* This alarm doesn't exist in real hardware; we wish it did. */ 275 QEMUTimer *alarm_timer; 276 }; 277 278 279 #ifndef CONFIG_USER_ONLY 280 extern const VMStateDescription vmstate_alpha_cpu; 281 #endif 282 283 void alpha_cpu_do_interrupt(CPUState *cpu); 284 bool alpha_cpu_exec_interrupt(CPUState *cpu, int int_req); 285 void alpha_cpu_dump_state(CPUState *cs, FILE *f, int flags); 286 hwaddr alpha_cpu_get_phys_page_debug(CPUState *cpu, vaddr addr); 287 int alpha_cpu_gdb_read_register(CPUState *cpu, uint8_t *buf, int reg); 288 int alpha_cpu_gdb_write_register(CPUState *cpu, uint8_t *buf, int reg); 289 void alpha_cpu_do_unaligned_access(CPUState *cpu, vaddr addr, 290 MMUAccessType access_type, 291 int mmu_idx, uintptr_t retaddr); 292 293 #define cpu_list alpha_cpu_list 294 #define cpu_signal_handler cpu_alpha_signal_handler 295 296 typedef CPUAlphaState CPUArchState; 297 typedef AlphaCPU ArchCPU; 298 299 #include "exec/cpu-all.h" 300 301 enum { 302 FEATURE_ASN = 0x00000001, 303 FEATURE_SPS = 0x00000002, 304 FEATURE_VIRBND = 0x00000004, 305 FEATURE_TBCHK = 0x00000008, 306 }; 307 308 enum { 309 EXCP_RESET, 310 EXCP_MCHK, 311 EXCP_SMP_INTERRUPT, 312 EXCP_CLK_INTERRUPT, 313 EXCP_DEV_INTERRUPT, 314 EXCP_MMFAULT, 315 EXCP_UNALIGN, 316 EXCP_OPCDEC, 317 EXCP_ARITH, 318 EXCP_FEN, 319 EXCP_CALL_PAL, 320 }; 321 322 /* Alpha-specific interrupt pending bits. */ 323 #define CPU_INTERRUPT_TIMER CPU_INTERRUPT_TGT_EXT_0 324 #define CPU_INTERRUPT_SMP CPU_INTERRUPT_TGT_EXT_1 325 #define CPU_INTERRUPT_MCHK CPU_INTERRUPT_TGT_EXT_2 326 327 /* OSF/1 Page table bits. */ 328 enum { 329 PTE_VALID = 0x0001, 330 PTE_FOR = 0x0002, /* used for page protection (fault on read) */ 331 PTE_FOW = 0x0004, /* used for page protection (fault on write) */ 332 PTE_FOE = 0x0008, /* used for page protection (fault on exec) */ 333 PTE_ASM = 0x0010, 334 PTE_KRE = 0x0100, 335 PTE_URE = 0x0200, 336 PTE_KWE = 0x1000, 337 PTE_UWE = 0x2000 338 }; 339 340 /* Hardware interrupt (entInt) constants. */ 341 enum { 342 INT_K_IP, 343 INT_K_CLK, 344 INT_K_MCHK, 345 INT_K_DEV, 346 INT_K_PERF, 347 }; 348 349 /* Memory management (entMM) constants. */ 350 enum { 351 MM_K_TNV, 352 MM_K_ACV, 353 MM_K_FOR, 354 MM_K_FOE, 355 MM_K_FOW 356 }; 357 358 /* Arithmetic exception (entArith) constants. */ 359 enum { 360 EXC_M_SWC = 1, /* Software completion */ 361 EXC_M_INV = 2, /* Invalid operation */ 362 EXC_M_DZE = 4, /* Division by zero */ 363 EXC_M_FOV = 8, /* Overflow */ 364 EXC_M_UNF = 16, /* Underflow */ 365 EXC_M_INE = 32, /* Inexact result */ 366 EXC_M_IOV = 64 /* Integer Overflow */ 367 }; 368 369 /* Processor status constants. */ 370 /* Low 3 bits are interrupt mask level. */ 371 #define PS_INT_MASK 7u 372 373 /* Bits 4 and 5 are the mmu mode. The VMS PALcode uses all 4 modes; 374 The Unix PALcode only uses bit 4. */ 375 #define PS_USER_MODE 8u 376 377 /* CPUAlphaState->flags constants. These are layed out so that we 378 can set or reset the pieces individually by assigning to the byte, 379 or manipulated as a whole. */ 380 381 #define ENV_FLAG_PAL_SHIFT 0 382 #define ENV_FLAG_PS_SHIFT 8 383 #define ENV_FLAG_RX_SHIFT 16 384 #define ENV_FLAG_FEN_SHIFT 24 385 386 #define ENV_FLAG_PAL_MODE (1u << ENV_FLAG_PAL_SHIFT) 387 #define ENV_FLAG_PS_USER (PS_USER_MODE << ENV_FLAG_PS_SHIFT) 388 #define ENV_FLAG_RX_FLAG (1u << ENV_FLAG_RX_SHIFT) 389 #define ENV_FLAG_FEN (1u << ENV_FLAG_FEN_SHIFT) 390 391 #define ENV_FLAG_TB_MASK \ 392 (ENV_FLAG_PAL_MODE | ENV_FLAG_PS_USER | ENV_FLAG_FEN) 393 394 static inline int cpu_mmu_index(CPUAlphaState *env, bool ifetch) 395 { 396 int ret = env->flags & ENV_FLAG_PS_USER ? MMU_USER_IDX : MMU_KERNEL_IDX; 397 if (env->flags & ENV_FLAG_PAL_MODE) { 398 ret = MMU_KERNEL_IDX; 399 } 400 return ret; 401 } 402 403 enum { 404 IR_V0 = 0, 405 IR_T0 = 1, 406 IR_T1 = 2, 407 IR_T2 = 3, 408 IR_T3 = 4, 409 IR_T4 = 5, 410 IR_T5 = 6, 411 IR_T6 = 7, 412 IR_T7 = 8, 413 IR_S0 = 9, 414 IR_S1 = 10, 415 IR_S2 = 11, 416 IR_S3 = 12, 417 IR_S4 = 13, 418 IR_S5 = 14, 419 IR_S6 = 15, 420 IR_FP = IR_S6, 421 IR_A0 = 16, 422 IR_A1 = 17, 423 IR_A2 = 18, 424 IR_A3 = 19, 425 IR_A4 = 20, 426 IR_A5 = 21, 427 IR_T8 = 22, 428 IR_T9 = 23, 429 IR_T10 = 24, 430 IR_T11 = 25, 431 IR_RA = 26, 432 IR_T12 = 27, 433 IR_PV = IR_T12, 434 IR_AT = 28, 435 IR_GP = 29, 436 IR_SP = 30, 437 IR_ZERO = 31, 438 }; 439 440 void alpha_translate_init(void); 441 442 #define ALPHA_CPU_TYPE_SUFFIX "-" TYPE_ALPHA_CPU 443 #define ALPHA_CPU_TYPE_NAME(model) model ALPHA_CPU_TYPE_SUFFIX 444 #define CPU_RESOLVING_TYPE TYPE_ALPHA_CPU 445 446 void alpha_cpu_list(void); 447 /* you can call this signal handler from your SIGBUS and SIGSEGV 448 signal handlers to inform the virtual CPU of exceptions. non zero 449 is returned if the signal was handled by the virtual CPU. */ 450 int cpu_alpha_signal_handler(int host_signum, void *pinfo, 451 void *puc); 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 void QEMU_NORETURN dynamic_excp(CPUAlphaState *, uintptr_t, int, int); 456 void QEMU_NORETURN arith_excp(CPUAlphaState *, uintptr_t, int, uint64_t); 457 458 uint64_t cpu_alpha_load_fpcr (CPUAlphaState *env); 459 void cpu_alpha_store_fpcr (CPUAlphaState *env, uint64_t val); 460 uint64_t cpu_alpha_load_gr(CPUAlphaState *env, unsigned reg); 461 void cpu_alpha_store_gr(CPUAlphaState *env, unsigned reg, uint64_t val); 462 #ifndef CONFIG_USER_ONLY 463 void alpha_cpu_do_transaction_failed(CPUState *cs, hwaddr physaddr, 464 vaddr addr, unsigned size, 465 MMUAccessType access_type, 466 int mmu_idx, MemTxAttrs attrs, 467 MemTxResult response, uintptr_t retaddr); 468 #endif 469 470 static inline void cpu_get_tb_cpu_state(CPUAlphaState *env, target_ulong *pc, 471 target_ulong *cs_base, uint32_t *pflags) 472 { 473 *pc = env->pc; 474 *cs_base = 0; 475 *pflags = env->flags & ENV_FLAG_TB_MASK; 476 } 477 478 #ifdef CONFIG_USER_ONLY 479 /* Copied from linux ieee_swcr_to_fpcr. */ 480 static inline uint64_t alpha_ieee_swcr_to_fpcr(uint64_t swcr) 481 { 482 uint64_t fpcr = 0; 483 484 fpcr |= (swcr & SWCR_STATUS_MASK) << 35; 485 fpcr |= (swcr & SWCR_MAP_DMZ) << 36; 486 fpcr |= (~swcr & (SWCR_TRAP_ENABLE_INV 487 | SWCR_TRAP_ENABLE_DZE 488 | SWCR_TRAP_ENABLE_OVF)) << 48; 489 fpcr |= (~swcr & (SWCR_TRAP_ENABLE_UNF 490 | SWCR_TRAP_ENABLE_INE)) << 57; 491 fpcr |= (swcr & SWCR_MAP_UMZ ? FPCR_UNDZ | FPCR_UNFD : 0); 492 fpcr |= (~swcr & SWCR_TRAP_ENABLE_DNO) << 41; 493 494 return fpcr; 495 } 496 497 /* Copied from linux ieee_fpcr_to_swcr. */ 498 static inline uint64_t alpha_ieee_fpcr_to_swcr(uint64_t fpcr) 499 { 500 uint64_t swcr = 0; 501 502 swcr |= (fpcr >> 35) & SWCR_STATUS_MASK; 503 swcr |= (fpcr >> 36) & SWCR_MAP_DMZ; 504 swcr |= (~fpcr >> 48) & (SWCR_TRAP_ENABLE_INV 505 | SWCR_TRAP_ENABLE_DZE 506 | SWCR_TRAP_ENABLE_OVF); 507 swcr |= (~fpcr >> 57) & (SWCR_TRAP_ENABLE_UNF | SWCR_TRAP_ENABLE_INE); 508 swcr |= (fpcr >> 47) & SWCR_MAP_UMZ; 509 swcr |= (~fpcr >> 41) & SWCR_TRAP_ENABLE_DNO; 510 511 return swcr; 512 } 513 #endif /* CONFIG_USER_ONLY */ 514 515 #endif /* ALPHA_CPU_H */ 516