1 /* SPDX-License-Identifier: GPL-2.0-only */ 2 /* 3 * Copyright (c) 2017 Red Hat Inc 4 * 5 * Authors: 6 * David Hildenbrand <david@redhat.com> 7 */ 8 #ifndef _ASMS390X_ARCH_DEF_H_ 9 #define _ASMS390X_ARCH_DEF_H_ 10 11 struct stack_frame { 12 struct stack_frame *back_chain; 13 uint64_t reserved; 14 /* GRs 2 - 5 */ 15 uint64_t argument_area[4]; 16 /* GRs 6 - 15 */ 17 uint64_t grs[10]; 18 /* FPRs 0, 2, 4, 6 */ 19 int64_t fprs[4]; 20 }; 21 22 struct stack_frame_int { 23 struct stack_frame *back_chain; 24 uint64_t reserved; 25 /* 26 * The GRs are offset compatible with struct stack_frame so we 27 * can easily fetch GR14 for backtraces. 28 */ 29 /* GRs 2 - 15 */ 30 uint64_t grs0[14]; 31 /* GRs 0 and 1 */ 32 uint64_t grs1[2]; 33 uint32_t reserved1; 34 uint32_t fpc; 35 uint64_t fprs[16]; 36 uint64_t crs[16]; 37 }; 38 39 struct psw { 40 union { 41 uint64_t mask; 42 struct { 43 uint64_t reserved00:1; 44 uint64_t per:1; 45 uint64_t reserved02:3; 46 uint64_t dat:1; 47 uint64_t io:1; 48 uint64_t ext:1; 49 uint64_t key:4; 50 uint64_t reserved12:1; 51 uint64_t mchk:1; 52 uint64_t wait:1; 53 uint64_t pstate:1; 54 uint64_t as:2; 55 uint64_t cc:2; 56 uint64_t prg_mask:4; 57 uint64_t reserved24:7; 58 uint64_t ea:1; 59 uint64_t ba:1; 60 uint64_t reserved33:31; 61 }; 62 }; 63 uint64_t addr; 64 }; 65 _Static_assert(sizeof(struct psw) == 16, "PSW size"); 66 67 #define PSW(m, a) ((struct psw){ .mask = (m), .addr = (uint64_t)(a) }) 68 69 struct short_psw { 70 uint32_t mask; 71 uint32_t addr; 72 }; 73 74 struct cpu { 75 struct lowcore *lowcore; 76 uint64_t *stack; 77 void (*pgm_cleanup_func)(struct stack_frame_int *); 78 void (*ext_cleanup_func)(struct stack_frame_int *); 79 uint16_t addr; 80 uint16_t idx; 81 bool active; 82 bool pgm_int_expected; 83 bool ext_int_expected; 84 bool in_interrupt_handler; 85 }; 86 87 enum address_space { 88 AS_PRIM = 0, 89 AS_ACCR = 1, 90 AS_SECN = 2, 91 AS_HOME = 3 92 }; 93 94 #define PSW_MASK_DAT 0x0400000000000000UL 95 #define PSW_MASK_HOME 0x0000C00000000000UL 96 #define PSW_MASK_IO 0x0200000000000000UL 97 #define PSW_MASK_EXT 0x0100000000000000UL 98 #define PSW_MASK_KEY 0x00F0000000000000UL 99 #define PSW_MASK_WAIT 0x0002000000000000UL 100 #define PSW_MASK_PSTATE 0x0001000000000000UL 101 #define PSW_MASK_EA 0x0000000100000000UL 102 #define PSW_MASK_BA 0x0000000080000000UL 103 #define PSW_MASK_64 (PSW_MASK_BA | PSW_MASK_EA) 104 105 #define CTL0_TRANSACT_EX_CTL (63 - 8) 106 #define CTL0_LOW_ADDR_PROT (63 - 35) 107 #define CTL0_EDAT (63 - 40) 108 #define CTL0_FETCH_PROTECTION_OVERRIDE (63 - 38) 109 #define CTL0_STORAGE_PROTECTION_OVERRIDE (63 - 39) 110 #define CTL0_IEP (63 - 43) 111 #define CTL0_AFP (63 - 45) 112 #define CTL0_VECTOR (63 - 46) 113 #define CTL0_EMERGENCY_SIGNAL (63 - 49) 114 #define CTL0_EXTERNAL_CALL (63 - 50) 115 #define CTL0_CLOCK_COMPARATOR (63 - 52) 116 #define CTL0_CPU_TIMER (63 - 53) 117 #define CTL0_SERVICE_SIGNAL (63 - 54) 118 #define CR0_EXTM_MASK 0x0000000000006200UL /* Combined external masks */ 119 120 #define CTL2_GUARDED_STORAGE (63 - 59) 121 122 struct lowcore { 123 uint8_t pad_0x0000[0x0080 - 0x0000]; /* 0x0000 */ 124 uint32_t ext_int_param; /* 0x0080 */ 125 uint16_t cpu_addr; /* 0x0084 */ 126 uint16_t ext_int_code; /* 0x0086 */ 127 uint16_t svc_int_id; /* 0x0088 */ 128 uint16_t svc_int_code; /* 0x008a */ 129 uint16_t pgm_int_id; /* 0x008c */ 130 uint16_t pgm_int_code; /* 0x008e */ 131 uint32_t dxc_vxc; /* 0x0090 */ 132 uint16_t mon_class_nb; /* 0x0094 */ 133 uint8_t per_code; /* 0x0096 */ 134 uint8_t per_atmid; /* 0x0097 */ 135 uint64_t per_addr; /* 0x0098 */ 136 uint8_t exc_acc_id; /* 0x00a0 */ 137 uint8_t per_acc_id; /* 0x00a1 */ 138 uint8_t op_acc_id; /* 0x00a2 */ 139 uint8_t arch_mode_id; /* 0x00a3 */ 140 uint8_t pad_0x00a4[0x00a8 - 0x00a4]; /* 0x00a4 */ 141 uint64_t trans_exc_id; /* 0x00a8 */ 142 uint64_t mon_code; /* 0x00b0 */ 143 uint32_t subsys_id_word; /* 0x00b8 */ 144 uint32_t io_int_param; /* 0x00bc */ 145 uint32_t io_int_word; /* 0x00c0 */ 146 uint8_t pad_0x00c4[0x00c8 - 0x00c4]; /* 0x00c4 */ 147 uint32_t stfl; /* 0x00c8 */ 148 uint8_t pad_0x00cc[0x00e8 - 0x00cc]; /* 0x00cc */ 149 uint64_t mcck_int_code; /* 0x00e8 */ 150 uint8_t pad_0x00f0[0x00f4 - 0x00f0]; /* 0x00f0 */ 151 uint32_t ext_damage_code; /* 0x00f4 */ 152 uint64_t failing_storage_addr; /* 0x00f8 */ 153 uint64_t emon_ca_origin; /* 0x0100 */ 154 uint32_t emon_ca_size; /* 0x0108 */ 155 uint32_t emon_exc_count; /* 0x010c */ 156 uint64_t breaking_event_addr; /* 0x0110 */ 157 uint8_t pad_0x0118[0x0120 - 0x0118]; /* 0x0118 */ 158 struct psw restart_old_psw; /* 0x0120 */ 159 struct psw ext_old_psw; /* 0x0130 */ 160 struct psw svc_old_psw; /* 0x0140 */ 161 struct psw pgm_old_psw; /* 0x0150 */ 162 struct psw mcck_old_psw; /* 0x0160 */ 163 struct psw io_old_psw; /* 0x0170 */ 164 uint8_t pad_0x0180[0x01a0 - 0x0180]; /* 0x0180 */ 165 struct psw restart_new_psw; /* 0x01a0 */ 166 struct psw ext_new_psw; /* 0x01b0 */ 167 struct psw svc_new_psw; /* 0x01c0 */ 168 struct psw pgm_new_psw; /* 0x01d0 */ 169 struct psw mcck_new_psw; /* 0x01e0 */ 170 struct psw io_new_psw; /* 0x01f0 */ 171 /* sw definition: save area for registers in interrupt handlers */ 172 uint64_t sw_int_grs[16]; /* 0x0200 */ 173 uint8_t pad_0x0280[0x0308 - 0x0280]; /* 0x0280 */ 174 uint64_t sw_int_crs[16]; /* 0x0308 */ 175 struct psw sw_int_psw; /* 0x0388 */ 176 struct cpu *this_cpu; /* 0x0398 */ 177 uint8_t pad_0x03a0[0x11b0 - 0x03a0]; /* 0x03a0 */ 178 uint64_t mcck_ext_sa_addr; /* 0x11b0 */ 179 uint8_t pad_0x11b8[0x1200 - 0x11b8]; /* 0x11b8 */ 180 uint64_t fprs_sa[16]; /* 0x1200 */ 181 uint64_t grs_sa[16]; /* 0x1280 */ 182 struct psw psw_sa; /* 0x1300 */ 183 uint8_t pad_0x1310[0x1318 - 0x1310]; /* 0x1310 */ 184 uint32_t prefix_sa; /* 0x1318 */ 185 uint32_t fpc_sa; /* 0x131c */ 186 uint8_t pad_0x1320[0x1324 - 0x1320]; /* 0x1320 */ 187 uint32_t tod_pr_sa; /* 0x1324 */ 188 uint64_t cputm_sa; /* 0x1328 */ 189 uint64_t cc_sa; /* 0x1330 */ 190 uint8_t pad_0x1338[0x1340 - 0x1338]; /* 0x1338 */ 191 uint32_t ars_sa[16]; /* 0x1340 */ 192 uint64_t crs_sa[16]; /* 0x1380 */ 193 uint8_t pad_0x1400[0x1800 - 0x1400]; /* 0x1400 */ 194 uint8_t pgm_int_tdb[0x1900 - 0x1800]; /* 0x1800 */ 195 } __attribute__ ((__packed__)); 196 _Static_assert(sizeof(struct lowcore) == 0x1900, "Lowcore size"); 197 198 extern struct lowcore lowcore; 199 200 #define THIS_CPU (lowcore.this_cpu) 201 202 #define PGM_INT_CODE_OPERATION 0x01 203 #define PGM_INT_CODE_PRIVILEGED_OPERATION 0x02 204 #define PGM_INT_CODE_EXECUTE 0x03 205 #define PGM_INT_CODE_PROTECTION 0x04 206 #define PGM_INT_CODE_ADDRESSING 0x05 207 #define PGM_INT_CODE_SPECIFICATION 0x06 208 #define PGM_INT_CODE_DATA 0x07 209 #define PGM_INT_CODE_FIXED_POINT_OVERFLOW 0x08 210 #define PGM_INT_CODE_FIXED_POINT_DIVIDE 0x09 211 #define PGM_INT_CODE_DECIMAL_OVERFLOW 0x0a 212 #define PGM_INT_CODE_DECIMAL_DIVIDE 0x0b 213 #define PGM_INT_CODE_HFP_EXPONENT_OVERFLOW 0x0c 214 #define PGM_INT_CODE_HFP_EXPONENT_UNDERFLOW 0x0d 215 #define PGM_INT_CODE_HFP_SIGNIFICANCE 0x0e 216 #define PGM_INT_CODE_HFP_DIVIDE 0x0f 217 #define PGM_INT_CODE_SEGMENT_TRANSLATION 0x10 218 #define PGM_INT_CODE_PAGE_TRANSLATION 0x11 219 #define PGM_INT_CODE_TRANSLATION_SPEC 0x12 220 #define PGM_INT_CODE_SPECIAL_OPERATION 0x13 221 #define PGM_INT_CODE_OPERAND 0x15 222 #define PGM_INT_CODE_TRACE_TABLE 0x16 223 #define PGM_INT_CODE_VECTOR_PROCESSING 0x1b 224 #define PGM_INT_CODE_SPACE_SWITCH_EVENT 0x1c 225 #define PGM_INT_CODE_HFP_SQUARE_ROOT 0x1d 226 #define PGM_INT_CODE_PC_TRANSLATION_SPEC 0x1f 227 #define PGM_INT_CODE_AFX_TRANSLATION 0x20 228 #define PGM_INT_CODE_ASX_TRANSLATION 0x21 229 #define PGM_INT_CODE_LX_TRANSLATION 0x22 230 #define PGM_INT_CODE_EX_TRANSLATION 0x23 231 #define PGM_INT_CODE_PRIMARY_AUTHORITY 0x24 232 #define PGM_INT_CODE_SECONDARY_AUTHORITY 0x25 233 #define PGM_INT_CODE_LFX_TRANSLATION 0x26 234 #define PGM_INT_CODE_LSX_TRANSLATION 0x27 235 #define PGM_INT_CODE_ALET_SPECIFICATION 0x28 236 #define PGM_INT_CODE_ALEN_TRANSLATION 0x29 237 #define PGM_INT_CODE_ALE_SEQUENCE 0x2a 238 #define PGM_INT_CODE_ASTE_VALIDITY 0x2b 239 #define PGM_INT_CODE_ASTE_SEQUENCE 0x2c 240 #define PGM_INT_CODE_EXTENDED_AUTHORITY 0x2d 241 #define PGM_INT_CODE_LSTE_SEQUENCE 0x2e 242 #define PGM_INT_CODE_ASTE_INSTANCE 0x2f 243 #define PGM_INT_CODE_STACK_FULL 0x30 244 #define PGM_INT_CODE_STACK_EMPTY 0x31 245 #define PGM_INT_CODE_STACK_SPECIFICATION 0x32 246 #define PGM_INT_CODE_STACK_TYPE 0x33 247 #define PGM_INT_CODE_STACK_OPERATION 0x34 248 #define PGM_INT_CODE_ASCE_TYPE 0x38 249 #define PGM_INT_CODE_REGION_FIRST_TRANS 0x39 250 #define PGM_INT_CODE_REGION_SECOND_TRANS 0x3a 251 #define PGM_INT_CODE_REGION_THIRD_TRANS 0x3b 252 #define PGM_INT_CODE_SECURE_STOR_ACCESS 0x3d 253 #define PGM_INT_CODE_NON_SECURE_STOR_ACCESS 0x3e 254 #define PGM_INT_CODE_SECURE_STOR_VIOLATION 0x3f 255 #define PGM_INT_CODE_MONITOR_EVENT 0x40 256 #define PGM_INT_CODE_PER 0x80 257 #define PGM_INT_CODE_CRYPTO_OPERATION 0x119 258 #define PGM_INT_CODE_TX_ABORTED_EVENT 0x200 259 260 struct cpuid { 261 uint64_t version : 8; 262 uint64_t id : 24; 263 uint64_t type : 16; 264 uint64_t format : 1; 265 uint64_t reserved : 15; 266 }; 267 268 #define SVC_LEAVE_PSTATE 1 269 270 static inline unsigned short stap(void) 271 { 272 unsigned short cpu_address; 273 274 asm volatile("stap %0" : "=Q" (cpu_address)); 275 return cpu_address; 276 } 277 278 static inline uint64_t stidp(void) 279 { 280 uint64_t cpuid; 281 282 asm volatile("stidp %0" : "=Q" (cpuid)); 283 284 return cpuid; 285 } 286 287 enum tprot_permission { 288 TPROT_READ_WRITE = 0, 289 TPROT_READ = 1, 290 TPROT_RW_PROTECTED = 2, 291 TPROT_TRANSL_UNAVAIL = 3, 292 }; 293 294 static inline enum tprot_permission tprot(unsigned long addr, char access_key) 295 { 296 int cc; 297 298 asm volatile( 299 " tprot 0(%1),0(%2)\n" 300 " ipm %0\n" 301 " srl %0,28\n" 302 : "=d" (cc) : "a" (addr), "a" (access_key << 4) : "cc"); 303 return (enum tprot_permission)cc; 304 } 305 306 static inline void lctlg(int cr, uint64_t value) 307 { 308 asm volatile( 309 " lctlg %1,%1,%0\n" 310 : : "Q" (value), "i" (cr)); 311 } 312 313 static inline uint64_t stctg(int cr) 314 { 315 uint64_t value; 316 317 asm volatile( 318 " stctg %1,%1,%0\n" 319 : "=Q" (value) : "i" (cr) : "memory"); 320 return value; 321 } 322 323 static inline void ctl_set_bit(int cr, unsigned int bit) 324 { 325 uint64_t reg; 326 327 reg = stctg(cr); 328 reg |= 1UL << bit; 329 lctlg(cr, reg); 330 } 331 332 static inline void ctl_clear_bit(int cr, unsigned int bit) 333 { 334 uint64_t reg; 335 336 reg = stctg(cr); 337 reg &= ~(1UL << bit); 338 lctlg(cr, reg); 339 } 340 341 static inline uint64_t extract_psw_mask(void) 342 { 343 uint32_t mask_upper = 0, mask_lower = 0; 344 345 asm volatile( 346 " epsw %0,%1\n" 347 : "=r" (mask_upper), "=a" (mask_lower)); 348 349 return (uint64_t) mask_upper << 32 | mask_lower; 350 } 351 352 #define PSW_WITH_CUR_MASK(addr) PSW(extract_psw_mask(), (addr)) 353 354 static inline void load_psw_mask(uint64_t mask) 355 { 356 struct psw psw = { 357 .mask = mask, 358 .addr = 0, 359 }; 360 uint64_t tmp = 0; 361 362 asm volatile( 363 " larl %0,0f\n" 364 " stg %0,8(%1)\n" 365 " lpswe 0(%1)\n" 366 "0:\n" 367 : "+r" (tmp) : "a" (&psw) : "memory", "cc" ); 368 } 369 370 static inline void disabled_wait(uint64_t message) 371 { 372 struct psw psw = { 373 .mask = PSW_MASK_WAIT, /* Disabled wait */ 374 .addr = message, 375 }; 376 377 asm volatile(" lpswe 0(%0)\n" : : "a" (&psw) : "memory", "cc"); 378 } 379 380 /** 381 * psw_mask_clear_bits - clears bits from the current PSW mask 382 * @clear: bitmask of bits that will be cleared 383 */ 384 static inline void psw_mask_clear_bits(uint64_t clear) 385 { 386 load_psw_mask(extract_psw_mask() & ~clear); 387 } 388 389 /** 390 * psw_mask_set_bits - sets bits on the current PSW mask 391 * @set: bitmask of bits that will be set 392 */ 393 static inline void psw_mask_set_bits(uint64_t set) 394 { 395 load_psw_mask(extract_psw_mask() | set); 396 } 397 398 /** 399 * psw_mask_clear_and_set_bits - clears and sets bits on the current PSW mask 400 * @clear: bitmask of bits that will be cleared 401 * @set: bitmask of bits that will be set 402 * 403 * The bits in the @clear mask will be cleared, then the bits in the @set mask 404 * will be set. 405 */ 406 static inline void psw_mask_clear_and_set_bits(uint64_t clear, uint64_t set) 407 { 408 load_psw_mask((extract_psw_mask() & ~clear) | set); 409 } 410 411 /** 412 * enable_dat - enable the DAT bit in the current PSW 413 */ 414 static inline void enable_dat(void) 415 { 416 psw_mask_set_bits(PSW_MASK_DAT); 417 } 418 419 /** 420 * disable_dat - disable the DAT bit in the current PSW 421 */ 422 static inline void disable_dat(void) 423 { 424 psw_mask_clear_bits(PSW_MASK_DAT); 425 } 426 427 static inline void wait_for_interrupt(uint64_t irq_mask) 428 { 429 uint64_t psw_mask = extract_psw_mask(); 430 431 load_psw_mask(psw_mask | irq_mask | PSW_MASK_WAIT); 432 /* 433 * After being woken and having processed the interrupt, let's restore 434 * the PSW mask. 435 */ 436 load_psw_mask(psw_mask); 437 } 438 439 static inline void enter_pstate(void) 440 { 441 psw_mask_set_bits(PSW_MASK_PSTATE); 442 } 443 444 static inline void leave_pstate(void) 445 { 446 asm volatile(" svc %0\n" : : "i" (SVC_LEAVE_PSTATE)); 447 } 448 449 static inline int stsi(void *addr, int fc, int sel1, int sel2) 450 { 451 register int r0 asm("0") = (fc << 28) | sel1; 452 register int r1 asm("1") = sel2; 453 int cc; 454 455 asm volatile( 456 "stsi 0(%3)\n" 457 "ipm %[cc]\n" 458 "srl %[cc],28\n" 459 : "+d" (r0), [cc] "=d" (cc) 460 : "d" (r1), "a" (addr) 461 : "cc", "memory"); 462 return cc; 463 } 464 465 static inline unsigned long stsi_get_fc(void) 466 { 467 register unsigned long r0 asm("0") = 0; 468 register unsigned long r1 asm("1") = 0; 469 int cc; 470 471 asm volatile("stsi 0\n" 472 "ipm %[cc]\n" 473 "srl %[cc],28\n" 474 : "+d" (r0), [cc] "=d" (cc) 475 : "d" (r1) 476 : "cc", "memory"); 477 assert(!cc); 478 return r0 >> 28; 479 } 480 481 static inline int servc(uint32_t command, unsigned long sccb) 482 { 483 int cc; 484 485 asm volatile( 486 " .insn rre,0xb2200000,%1,%2\n" /* servc %1,%2 */ 487 " ipm %0\n" 488 " srl %0,28" 489 : "=&d" (cc) : "d" (command), "a" (sccb) 490 : "cc", "memory"); 491 return cc; 492 } 493 494 static inline void set_prefix(uint32_t new_prefix) 495 { 496 asm volatile(" spx %0" : : "Q" (new_prefix) : "memory"); 497 } 498 499 static inline uint32_t get_prefix(void) 500 { 501 uint32_t current_prefix; 502 503 asm volatile(" stpx %0" : "=Q" (current_prefix)); 504 return current_prefix; 505 } 506 507 #endif 508