1 /* 2 * s390x internal definitions and helpers 3 * 4 * Copyright (c) 2009 Ulrich Hecht 5 * 6 * This work is licensed under the terms of the GNU GPL, version 2 or later. 7 * See the COPYING file in the top-level directory. 8 */ 9 10 #ifndef S390X_INTERNAL_H 11 #define S390X_INTERNAL_H 12 13 #include "cpu.h" 14 15 #ifndef CONFIG_USER_ONLY 16 typedef struct LowCore { 17 /* prefix area: defined by architecture */ 18 uint32_t ccw1[2]; /* 0x000 */ 19 uint32_t ccw2[4]; /* 0x008 */ 20 uint8_t pad1[0x80 - 0x18]; /* 0x018 */ 21 uint32_t ext_params; /* 0x080 */ 22 uint16_t cpu_addr; /* 0x084 */ 23 uint16_t ext_int_code; /* 0x086 */ 24 uint16_t svc_ilen; /* 0x088 */ 25 uint16_t svc_code; /* 0x08a */ 26 uint16_t pgm_ilen; /* 0x08c */ 27 uint16_t pgm_code; /* 0x08e */ 28 uint32_t data_exc_code; /* 0x090 */ 29 uint16_t mon_class_num; /* 0x094 */ 30 uint16_t per_perc_atmid; /* 0x096 */ 31 uint64_t per_address; /* 0x098 */ 32 uint8_t exc_access_id; /* 0x0a0 */ 33 uint8_t per_access_id; /* 0x0a1 */ 34 uint8_t op_access_id; /* 0x0a2 */ 35 uint8_t ar_access_id; /* 0x0a3 */ 36 uint8_t pad2[0xA8 - 0xA4]; /* 0x0a4 */ 37 uint64_t trans_exc_code; /* 0x0a8 */ 38 uint64_t monitor_code; /* 0x0b0 */ 39 uint16_t subchannel_id; /* 0x0b8 */ 40 uint16_t subchannel_nr; /* 0x0ba */ 41 uint32_t io_int_parm; /* 0x0bc */ 42 uint32_t io_int_word; /* 0x0c0 */ 43 uint8_t pad3[0xc8 - 0xc4]; /* 0x0c4 */ 44 uint32_t stfl_fac_list; /* 0x0c8 */ 45 uint8_t pad4[0xe8 - 0xcc]; /* 0x0cc */ 46 uint64_t mcic; /* 0x0e8 */ 47 uint8_t pad5[0xf4 - 0xf0]; /* 0x0f0 */ 48 uint32_t external_damage_code; /* 0x0f4 */ 49 uint64_t failing_storage_address; /* 0x0f8 */ 50 uint8_t pad6[0x110 - 0x100]; /* 0x100 */ 51 uint64_t per_breaking_event_addr; /* 0x110 */ 52 uint8_t pad7[0x120 - 0x118]; /* 0x118 */ 53 PSW restart_old_psw; /* 0x120 */ 54 PSW external_old_psw; /* 0x130 */ 55 PSW svc_old_psw; /* 0x140 */ 56 PSW program_old_psw; /* 0x150 */ 57 PSW mcck_old_psw; /* 0x160 */ 58 PSW io_old_psw; /* 0x170 */ 59 uint8_t pad8[0x1a0 - 0x180]; /* 0x180 */ 60 PSW restart_new_psw; /* 0x1a0 */ 61 PSW external_new_psw; /* 0x1b0 */ 62 PSW svc_new_psw; /* 0x1c0 */ 63 PSW program_new_psw; /* 0x1d0 */ 64 PSW mcck_new_psw; /* 0x1e0 */ 65 PSW io_new_psw; /* 0x1f0 */ 66 uint8_t pad13[0x11b0 - 0x200]; /* 0x200 */ 67 68 uint64_t mcesad; /* 0x11B0 */ 69 70 /* 64 bit extparam used for pfault, diag 250 etc */ 71 uint64_t ext_params2; /* 0x11B8 */ 72 73 uint8_t pad14[0x1200 - 0x11C0]; /* 0x11C0 */ 74 75 /* System info area */ 76 77 uint64_t floating_pt_save_area[16]; /* 0x1200 */ 78 uint64_t gpregs_save_area[16]; /* 0x1280 */ 79 uint32_t st_status_fixed_logout[4]; /* 0x1300 */ 80 uint8_t pad15[0x1318 - 0x1310]; /* 0x1310 */ 81 uint32_t prefixreg_save_area; /* 0x1318 */ 82 uint32_t fpt_creg_save_area; /* 0x131c */ 83 uint8_t pad16[0x1324 - 0x1320]; /* 0x1320 */ 84 uint32_t tod_progreg_save_area; /* 0x1324 */ 85 uint64_t cpu_timer_save_area; /* 0x1328 */ 86 uint64_t clock_comp_save_area; /* 0x1330 */ 87 uint8_t pad17[0x1340 - 0x1338]; /* 0x1338 */ 88 uint32_t access_regs_save_area[16]; /* 0x1340 */ 89 uint64_t cregs_save_area[16]; /* 0x1380 */ 90 91 /* align to the top of the prefix area */ 92 93 uint8_t pad18[0x2000 - 0x1400]; /* 0x1400 */ 94 } QEMU_PACKED LowCore; 95 QEMU_BUILD_BUG_ON(sizeof(LowCore) != 8192); 96 #endif /* CONFIG_USER_ONLY */ 97 98 #define MAX_ILEN 6 99 100 /* While the PoO talks about ILC (a number between 1-3) what is actually 101 stored in LowCore is shifted left one bit (an even between 2-6). As 102 this is the actual length of the insn and therefore more useful, that 103 is what we want to pass around and manipulate. To make sure that we 104 have applied this distinction universally, rename the "ILC" to "ILEN". */ 105 static inline int get_ilen(uint8_t opc) 106 { 107 switch (opc >> 6) { 108 case 0: 109 return 2; 110 case 1: 111 case 2: 112 return 4; 113 default: 114 return 6; 115 } 116 } 117 118 /* Compute the ATMID field that is stored in the per_perc_atmid lowcore 119 entry when a PER exception is triggered. */ 120 static inline uint8_t get_per_atmid(CPUS390XState *env) 121 { 122 return ((env->psw.mask & PSW_MASK_64) ? (1 << 7) : 0) | 123 (1 << 6) | 124 ((env->psw.mask & PSW_MASK_32) ? (1 << 5) : 0) | 125 ((env->psw.mask & PSW_MASK_DAT) ? (1 << 4) : 0) | 126 ((env->psw.mask & PSW_ASC_SECONDARY) ? (1 << 3) : 0) | 127 ((env->psw.mask & PSW_ASC_ACCREG) ? (1 << 2) : 0); 128 } 129 130 static inline uint64_t wrap_address(CPUS390XState *env, uint64_t a) 131 { 132 if (!(env->psw.mask & PSW_MASK_64)) { 133 if (!(env->psw.mask & PSW_MASK_32)) { 134 /* 24-Bit mode */ 135 a &= 0x00ffffff; 136 } else { 137 /* 31-Bit mode */ 138 a &= 0x7fffffff; 139 } 140 } 141 return a; 142 } 143 144 /* CC optimization */ 145 146 /* Instead of computing the condition codes after each x86 instruction, 147 * QEMU just stores the result (called CC_DST), the type of operation 148 * (called CC_OP) and whatever operands are needed (CC_SRC and possibly 149 * CC_VR). When the condition codes are needed, the condition codes can 150 * be calculated using this information. Condition codes are not generated 151 * if they are only needed for conditional branches. 152 */ 153 enum cc_op { 154 CC_OP_CONST0 = 0, /* CC is 0 */ 155 CC_OP_CONST1, /* CC is 1 */ 156 CC_OP_CONST2, /* CC is 2 */ 157 CC_OP_CONST3, /* CC is 3 */ 158 159 CC_OP_DYNAMIC, /* CC calculation defined by env->cc_op */ 160 CC_OP_STATIC, /* CC value is env->cc_op */ 161 162 CC_OP_NZ, /* env->cc_dst != 0 */ 163 CC_OP_ADDU, /* dst != 0, src = carry out (0,1) */ 164 CC_OP_SUBU, /* dst != 0, src = borrow out (0,-1) */ 165 166 CC_OP_LTGT_32, /* signed less/greater than (32bit) */ 167 CC_OP_LTGT_64, /* signed less/greater than (64bit) */ 168 CC_OP_LTUGTU_32, /* unsigned less/greater than (32bit) */ 169 CC_OP_LTUGTU_64, /* unsigned less/greater than (64bit) */ 170 CC_OP_LTGT0_32, /* signed less/greater than 0 (32bit) */ 171 CC_OP_LTGT0_64, /* signed less/greater than 0 (64bit) */ 172 173 CC_OP_ADD_64, /* overflow on add (64bit) */ 174 CC_OP_SUB_64, /* overflow on subtraction (64bit) */ 175 CC_OP_ABS_64, /* sign eval on abs (64bit) */ 176 CC_OP_NABS_64, /* sign eval on nabs (64bit) */ 177 CC_OP_MULS_64, /* overflow on signed multiply (64bit) */ 178 179 CC_OP_ADD_32, /* overflow on add (32bit) */ 180 CC_OP_SUB_32, /* overflow on subtraction (32bit) */ 181 CC_OP_ABS_32, /* sign eval on abs (64bit) */ 182 CC_OP_NABS_32, /* sign eval on nabs (64bit) */ 183 CC_OP_MULS_32, /* overflow on signed multiply (32bit) */ 184 185 CC_OP_COMP_32, /* complement */ 186 CC_OP_COMP_64, /* complement */ 187 188 CC_OP_TM_32, /* test under mask (32bit) */ 189 CC_OP_TM_64, /* test under mask (64bit) */ 190 191 CC_OP_NZ_F32, /* FP dst != 0 (32bit) */ 192 CC_OP_NZ_F64, /* FP dst != 0 (64bit) */ 193 CC_OP_NZ_F128, /* FP dst != 0 (128bit) */ 194 195 CC_OP_ICM, /* insert characters under mask */ 196 CC_OP_SLA, /* Calculate shift left signed */ 197 CC_OP_FLOGR, /* find leftmost one */ 198 CC_OP_LCBB, /* load count to block boundary */ 199 CC_OP_VC, /* vector compare result */ 200 CC_OP_MAX 201 }; 202 203 #ifndef CONFIG_USER_ONLY 204 205 static inline hwaddr decode_basedisp_s(CPUS390XState *env, uint32_t ipb, 206 uint8_t *ar) 207 { 208 hwaddr addr = 0; 209 uint8_t reg; 210 211 reg = ipb >> 28; 212 if (reg > 0) { 213 addr = env->regs[reg]; 214 } 215 addr += (ipb >> 16) & 0xfff; 216 if (ar) { 217 *ar = reg; 218 } 219 220 return addr; 221 } 222 223 /* Base/displacement are at the same locations. */ 224 #define decode_basedisp_rs decode_basedisp_s 225 226 #endif /* CONFIG_USER_ONLY */ 227 228 /* arch_dump.c */ 229 int s390_cpu_write_elf64_note(WriteCoreDumpFunction f, CPUState *cs, 230 int cpuid, void *opaque); 231 232 233 /* cc_helper.c */ 234 const char *cc_name(enum cc_op cc_op); 235 uint32_t calc_cc(CPUS390XState *env, uint32_t cc_op, uint64_t src, uint64_t dst, 236 uint64_t vr); 237 238 /* cpu.c */ 239 #ifndef CONFIG_USER_ONLY 240 unsigned int s390_cpu_halt(S390CPU *cpu); 241 void s390_cpu_unhalt(S390CPU *cpu); 242 void s390_cpu_init_sysemu(Object *obj); 243 bool s390_cpu_realize_sysemu(DeviceState *dev, Error **errp); 244 void s390_cpu_finalize(Object *obj); 245 void s390_cpu_class_init_sysemu(CPUClass *cc); 246 void s390_cpu_machine_reset_cb(void *opaque); 247 248 #else 249 static inline unsigned int s390_cpu_halt(S390CPU *cpu) 250 { 251 return 0; 252 } 253 254 static inline void s390_cpu_unhalt(S390CPU *cpu) 255 { 256 } 257 #endif /* CONFIG_USER_ONLY */ 258 259 260 /* cpu_models.c */ 261 void s390_cpu_model_class_register_props(ObjectClass *oc); 262 void s390_realize_cpu_model(CPUState *cs, Error **errp); 263 S390CPUModel *get_max_cpu_model(Error **errp); 264 void apply_cpu_model(const S390CPUModel *model, Error **errp); 265 ObjectClass *s390_cpu_class_by_name(const char *name); 266 267 268 /* excp_helper.c */ 269 void s390x_cpu_debug_excp_handler(CPUState *cs); 270 void s390_cpu_do_interrupt(CPUState *cpu); 271 bool s390_cpu_exec_interrupt(CPUState *cpu, int int_req); 272 273 #ifdef CONFIG_USER_ONLY 274 void s390_cpu_record_sigsegv(CPUState *cs, vaddr address, 275 MMUAccessType access_type, 276 bool maperr, uintptr_t retaddr); 277 void s390_cpu_record_sigbus(CPUState *cs, vaddr address, 278 MMUAccessType access_type, uintptr_t retaddr); 279 #else 280 bool s390_cpu_tlb_fill(CPUState *cs, vaddr address, int size, 281 MMUAccessType access_type, int mmu_idx, 282 bool probe, uintptr_t retaddr); 283 G_NORETURN void s390x_cpu_do_unaligned_access(CPUState *cs, vaddr addr, 284 MMUAccessType access_type, int mmu_idx, 285 uintptr_t retaddr); 286 #endif 287 288 289 /* fpu_helper.c */ 290 uint32_t set_cc_nz_f32(float32 v); 291 uint32_t set_cc_nz_f64(float64 v); 292 uint32_t set_cc_nz_f128(float128 v); 293 #define S390_IEEE_MASK_INVALID 0x80 294 #define S390_IEEE_MASK_DIVBYZERO 0x40 295 #define S390_IEEE_MASK_OVERFLOW 0x20 296 #define S390_IEEE_MASK_UNDERFLOW 0x10 297 #define S390_IEEE_MASK_INEXACT 0x08 298 #define S390_IEEE_MASK_QUANTUM 0x04 299 uint8_t s390_softfloat_exc_to_ieee(unsigned int exc); 300 int s390_swap_bfp_rounding_mode(CPUS390XState *env, int m3); 301 void s390_restore_bfp_rounding_mode(CPUS390XState *env, int old_mode); 302 int float_comp_to_cc(CPUS390XState *env, int float_compare); 303 304 #define DCMASK_ZERO 0x0c00 305 #define DCMASK_NORMAL 0x0300 306 #define DCMASK_SUBNORMAL 0x00c0 307 #define DCMASK_INFINITY 0x0030 308 #define DCMASK_QUIET_NAN 0x000c 309 #define DCMASK_SIGNALING_NAN 0x0003 310 #define DCMASK_NAN 0x000f 311 #define DCMASK_NEGATIVE 0x0555 312 uint16_t float32_dcmask(CPUS390XState *env, float32 f1); 313 uint16_t float64_dcmask(CPUS390XState *env, float64 f1); 314 uint16_t float128_dcmask(CPUS390XState *env, float128 f1); 315 316 317 /* gdbstub.c */ 318 int s390_cpu_gdb_read_register(CPUState *cpu, GByteArray *buf, int reg); 319 int s390_cpu_gdb_write_register(CPUState *cpu, uint8_t *buf, int reg); 320 void s390_cpu_gdb_init(CPUState *cs); 321 322 323 /* helper.c */ 324 void s390_cpu_dump_state(CPUState *cpu, FILE *f, int flags); 325 void do_restart_interrupt(CPUS390XState *env); 326 #ifndef CONFIG_USER_ONLY 327 void s390_cpu_recompute_watchpoints(CPUState *cs); 328 void s390x_tod_timer(void *opaque); 329 void s390x_cpu_timer(void *opaque); 330 void s390_handle_wait(S390CPU *cpu); 331 hwaddr s390_cpu_get_phys_page_debug(CPUState *cpu, vaddr addr); 332 hwaddr s390_cpu_get_phys_addr_debug(CPUState *cpu, vaddr addr); 333 #define S390_STORE_STATUS_DEF_ADDR offsetof(LowCore, floating_pt_save_area) 334 int s390_store_status(S390CPU *cpu, hwaddr addr, bool store_arch); 335 int s390_store_adtl_status(S390CPU *cpu, hwaddr addr, hwaddr len); 336 LowCore *cpu_map_lowcore(CPUS390XState *env); 337 void cpu_unmap_lowcore(LowCore *lowcore); 338 #endif /* CONFIG_USER_ONLY */ 339 340 341 /* interrupt.c */ 342 void trigger_pgm_exception(CPUS390XState *env, uint32_t code); 343 void cpu_inject_clock_comparator(S390CPU *cpu); 344 void cpu_inject_cpu_timer(S390CPU *cpu); 345 void cpu_inject_emergency_signal(S390CPU *cpu, uint16_t src_cpu_addr); 346 int cpu_inject_external_call(S390CPU *cpu, uint16_t src_cpu_addr); 347 bool s390_cpu_has_io_int(S390CPU *cpu); 348 bool s390_cpu_has_ext_int(S390CPU *cpu); 349 bool s390_cpu_has_mcck_int(S390CPU *cpu); 350 bool s390_cpu_has_int(S390CPU *cpu); 351 bool s390_cpu_has_restart_int(S390CPU *cpu); 352 bool s390_cpu_has_stop_int(S390CPU *cpu); 353 void cpu_inject_restart(S390CPU *cpu); 354 void cpu_inject_stop(S390CPU *cpu); 355 356 357 /* ioinst.c */ 358 void ioinst_handle_xsch(S390CPU *cpu, uint64_t reg1, uintptr_t ra); 359 void ioinst_handle_csch(S390CPU *cpu, uint64_t reg1, uintptr_t ra); 360 void ioinst_handle_hsch(S390CPU *cpu, uint64_t reg1, uintptr_t ra); 361 void ioinst_handle_msch(S390CPU *cpu, uint64_t reg1, uint32_t ipb, 362 uintptr_t ra); 363 void ioinst_handle_ssch(S390CPU *cpu, uint64_t reg1, uint32_t ipb, 364 uintptr_t ra); 365 void ioinst_handle_stcrw(S390CPU *cpu, uint32_t ipb, uintptr_t ra); 366 void ioinst_handle_stsch(S390CPU *cpu, uint64_t reg1, uint32_t ipb, 367 uintptr_t ra); 368 int ioinst_handle_tsch(S390CPU *cpu, uint64_t reg1, uint32_t ipb, uintptr_t ra); 369 void ioinst_handle_chsc(S390CPU *cpu, uint32_t ipb, uintptr_t ra); 370 void ioinst_handle_schm(S390CPU *cpu, uint64_t reg1, uint64_t reg2, 371 uint32_t ipb, uintptr_t ra); 372 void ioinst_handle_rsch(S390CPU *cpu, uint64_t reg1, uintptr_t ra); 373 void ioinst_handle_rchp(S390CPU *cpu, uint64_t reg1, uintptr_t ra); 374 void ioinst_handle_sal(S390CPU *cpu, uint64_t reg1, uintptr_t ra); 375 376 377 /* mem_helper.c */ 378 target_ulong mmu_real2abs(CPUS390XState *env, target_ulong raddr); 379 void probe_write_access(CPUS390XState *env, uint64_t addr, uint64_t len, 380 uintptr_t ra); 381 382 383 /* mmu_helper.c */ 384 bool mmu_absolute_addr_valid(target_ulong addr, bool is_write); 385 /* Special access mode only valid for mmu_translate() */ 386 #define MMU_S390_LRA -1 387 int mmu_translate(CPUS390XState *env, target_ulong vaddr, int rw, uint64_t asc, 388 target_ulong *raddr, int *flags, uint64_t *tec); 389 int mmu_translate_real(CPUS390XState *env, target_ulong raddr, int rw, 390 target_ulong *addr, int *flags, uint64_t *tec); 391 392 393 /* misc_helper.c */ 394 int handle_diag_288(CPUS390XState *env, uint64_t r1, uint64_t r3); 395 void handle_diag_308(CPUS390XState *env, uint64_t r1, uint64_t r3, 396 uintptr_t ra); 397 398 399 /* translate.c */ 400 void s390x_translate_init(void); 401 402 403 /* sigp.c */ 404 int handle_sigp(CPUS390XState *env, uint8_t order, uint64_t r1, uint64_t r3); 405 void do_stop_interrupt(CPUS390XState *env); 406 407 #endif /* S390X_INTERNAL_H */ 408