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 /* 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 #endif 278 279 void alpha_cpu_do_interrupt(CPUState *cpu); 280 bool alpha_cpu_exec_interrupt(CPUState *cpu, int int_req); 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 void alpha_cpu_do_unaligned_access(CPUState *cpu, vaddr addr, 286 MMUAccessType access_type, 287 int mmu_idx, uintptr_t retaddr); 288 289 #define cpu_list alpha_cpu_list 290 #define cpu_signal_handler cpu_alpha_signal_handler 291 292 typedef CPUAlphaState CPUArchState; 293 typedef AlphaCPU ArchCPU; 294 295 #include "exec/cpu-all.h" 296 297 enum { 298 FEATURE_ASN = 0x00000001, 299 FEATURE_SPS = 0x00000002, 300 FEATURE_VIRBND = 0x00000004, 301 FEATURE_TBCHK = 0x00000008, 302 }; 303 304 enum { 305 EXCP_RESET, 306 EXCP_MCHK, 307 EXCP_SMP_INTERRUPT, 308 EXCP_CLK_INTERRUPT, 309 EXCP_DEV_INTERRUPT, 310 EXCP_MMFAULT, 311 EXCP_UNALIGN, 312 EXCP_OPCDEC, 313 EXCP_ARITH, 314 EXCP_FEN, 315 EXCP_CALL_PAL, 316 }; 317 318 /* Alpha-specific interrupt pending bits. */ 319 #define CPU_INTERRUPT_TIMER CPU_INTERRUPT_TGT_EXT_0 320 #define CPU_INTERRUPT_SMP CPU_INTERRUPT_TGT_EXT_1 321 #define CPU_INTERRUPT_MCHK CPU_INTERRUPT_TGT_EXT_2 322 323 /* OSF/1 Page table bits. */ 324 enum { 325 PTE_VALID = 0x0001, 326 PTE_FOR = 0x0002, /* used for page protection (fault on read) */ 327 PTE_FOW = 0x0004, /* used for page protection (fault on write) */ 328 PTE_FOE = 0x0008, /* used for page protection (fault on exec) */ 329 PTE_ASM = 0x0010, 330 PTE_KRE = 0x0100, 331 PTE_URE = 0x0200, 332 PTE_KWE = 0x1000, 333 PTE_UWE = 0x2000 334 }; 335 336 /* Hardware interrupt (entInt) constants. */ 337 enum { 338 INT_K_IP, 339 INT_K_CLK, 340 INT_K_MCHK, 341 INT_K_DEV, 342 INT_K_PERF, 343 }; 344 345 /* Memory management (entMM) constants. */ 346 enum { 347 MM_K_TNV, 348 MM_K_ACV, 349 MM_K_FOR, 350 MM_K_FOE, 351 MM_K_FOW 352 }; 353 354 /* Arithmetic exception (entArith) constants. */ 355 enum { 356 EXC_M_SWC = 1, /* Software completion */ 357 EXC_M_INV = 2, /* Invalid operation */ 358 EXC_M_DZE = 4, /* Division by zero */ 359 EXC_M_FOV = 8, /* Overflow */ 360 EXC_M_UNF = 16, /* Underflow */ 361 EXC_M_INE = 32, /* Inexact result */ 362 EXC_M_IOV = 64 /* Integer Overflow */ 363 }; 364 365 /* Processor status constants. */ 366 /* Low 3 bits are interrupt mask level. */ 367 #define PS_INT_MASK 7u 368 369 /* Bits 4 and 5 are the mmu mode. The VMS PALcode uses all 4 modes; 370 The Unix PALcode only uses bit 4. */ 371 #define PS_USER_MODE 8u 372 373 /* CPUAlphaState->flags constants. These are layed out so that we 374 can set or reset the pieces individually by assigning to the byte, 375 or manipulated as a whole. */ 376 377 #define ENV_FLAG_PAL_SHIFT 0 378 #define ENV_FLAG_PS_SHIFT 8 379 #define ENV_FLAG_RX_SHIFT 16 380 #define ENV_FLAG_FEN_SHIFT 24 381 382 #define ENV_FLAG_PAL_MODE (1u << ENV_FLAG_PAL_SHIFT) 383 #define ENV_FLAG_PS_USER (PS_USER_MODE << ENV_FLAG_PS_SHIFT) 384 #define ENV_FLAG_RX_FLAG (1u << ENV_FLAG_RX_SHIFT) 385 #define ENV_FLAG_FEN (1u << ENV_FLAG_FEN_SHIFT) 386 387 #define ENV_FLAG_TB_MASK \ 388 (ENV_FLAG_PAL_MODE | ENV_FLAG_PS_USER | ENV_FLAG_FEN) 389 390 static inline int cpu_mmu_index(CPUAlphaState *env, bool ifetch) 391 { 392 int ret = env->flags & ENV_FLAG_PS_USER ? MMU_USER_IDX : MMU_KERNEL_IDX; 393 if (env->flags & ENV_FLAG_PAL_MODE) { 394 ret = MMU_KERNEL_IDX; 395 } 396 return ret; 397 } 398 399 enum { 400 IR_V0 = 0, 401 IR_T0 = 1, 402 IR_T1 = 2, 403 IR_T2 = 3, 404 IR_T3 = 4, 405 IR_T4 = 5, 406 IR_T5 = 6, 407 IR_T6 = 7, 408 IR_T7 = 8, 409 IR_S0 = 9, 410 IR_S1 = 10, 411 IR_S2 = 11, 412 IR_S3 = 12, 413 IR_S4 = 13, 414 IR_S5 = 14, 415 IR_S6 = 15, 416 IR_FP = IR_S6, 417 IR_A0 = 16, 418 IR_A1 = 17, 419 IR_A2 = 18, 420 IR_A3 = 19, 421 IR_A4 = 20, 422 IR_A5 = 21, 423 IR_T8 = 22, 424 IR_T9 = 23, 425 IR_T10 = 24, 426 IR_T11 = 25, 427 IR_RA = 26, 428 IR_T12 = 27, 429 IR_PV = IR_T12, 430 IR_AT = 28, 431 IR_GP = 29, 432 IR_SP = 30, 433 IR_ZERO = 31, 434 }; 435 436 void alpha_translate_init(void); 437 438 #define ALPHA_CPU_TYPE_SUFFIX "-" TYPE_ALPHA_CPU 439 #define ALPHA_CPU_TYPE_NAME(model) model ALPHA_CPU_TYPE_SUFFIX 440 #define CPU_RESOLVING_TYPE TYPE_ALPHA_CPU 441 442 void alpha_cpu_list(void); 443 /* you can call this signal handler from your SIGBUS and SIGSEGV 444 signal handlers to inform the virtual CPU of exceptions. non zero 445 is returned if the signal was handled by the virtual CPU. */ 446 int cpu_alpha_signal_handler(int host_signum, void *pinfo, 447 void *puc); 448 bool alpha_cpu_tlb_fill(CPUState *cs, vaddr address, int size, 449 MMUAccessType access_type, int mmu_idx, 450 bool probe, uintptr_t retaddr); 451 void QEMU_NORETURN dynamic_excp(CPUAlphaState *, uintptr_t, int, int); 452 void QEMU_NORETURN arith_excp(CPUAlphaState *, uintptr_t, int, uint64_t); 453 454 uint64_t cpu_alpha_load_fpcr (CPUAlphaState *env); 455 void cpu_alpha_store_fpcr (CPUAlphaState *env, uint64_t val); 456 uint64_t cpu_alpha_load_gr(CPUAlphaState *env, unsigned reg); 457 void cpu_alpha_store_gr(CPUAlphaState *env, unsigned reg, uint64_t val); 458 #ifndef CONFIG_USER_ONLY 459 void alpha_cpu_do_transaction_failed(CPUState *cs, hwaddr physaddr, 460 vaddr addr, unsigned size, 461 MMUAccessType access_type, 462 int mmu_idx, MemTxAttrs attrs, 463 MemTxResult response, uintptr_t retaddr); 464 #endif 465 466 static inline void cpu_get_tb_cpu_state(CPUAlphaState *env, target_ulong *pc, 467 target_ulong *cs_base, uint32_t *pflags) 468 { 469 *pc = env->pc; 470 *cs_base = 0; 471 *pflags = env->flags & ENV_FLAG_TB_MASK; 472 } 473 474 #ifdef CONFIG_USER_ONLY 475 /* Copied from linux ieee_swcr_to_fpcr. */ 476 static inline uint64_t alpha_ieee_swcr_to_fpcr(uint64_t swcr) 477 { 478 uint64_t fpcr = 0; 479 480 fpcr |= (swcr & SWCR_STATUS_MASK) << 35; 481 fpcr |= (swcr & SWCR_MAP_DMZ) << 36; 482 fpcr |= (~swcr & (SWCR_TRAP_ENABLE_INV 483 | SWCR_TRAP_ENABLE_DZE 484 | SWCR_TRAP_ENABLE_OVF)) << 48; 485 fpcr |= (~swcr & (SWCR_TRAP_ENABLE_UNF 486 | SWCR_TRAP_ENABLE_INE)) << 57; 487 fpcr |= (swcr & SWCR_MAP_UMZ ? FPCR_UNDZ | FPCR_UNFD : 0); 488 fpcr |= (~swcr & SWCR_TRAP_ENABLE_DNO) << 41; 489 490 return fpcr; 491 } 492 493 /* Copied from linux ieee_fpcr_to_swcr. */ 494 static inline uint64_t alpha_ieee_fpcr_to_swcr(uint64_t fpcr) 495 { 496 uint64_t swcr = 0; 497 498 swcr |= (fpcr >> 35) & SWCR_STATUS_MASK; 499 swcr |= (fpcr >> 36) & SWCR_MAP_DMZ; 500 swcr |= (~fpcr >> 48) & (SWCR_TRAP_ENABLE_INV 501 | SWCR_TRAP_ENABLE_DZE 502 | SWCR_TRAP_ENABLE_OVF); 503 swcr |= (~fpcr >> 57) & (SWCR_TRAP_ENABLE_UNF | SWCR_TRAP_ENABLE_INE); 504 swcr |= (fpcr >> 47) & SWCR_MAP_UMZ; 505 swcr |= (~fpcr >> 41) & SWCR_TRAP_ENABLE_DNO; 506 507 return swcr; 508 } 509 #endif /* CONFIG_USER_ONLY */ 510 511 #endif /* ALPHA_CPU_H */ 512