1 /* 2 * OpenRISC virtual CPU header. 3 * 4 * Copyright (c) 2011-2012 Jia Liu <proljc@gmail.com> 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 OPENRISC_CPU_H 21 #define OPENRISC_CPU_H 22 23 #include "exec/cpu-defs.h" 24 #include "fpu/softfloat-types.h" 25 #include "hw/core/cpu.h" 26 #include "qom/object.h" 27 28 #define TCG_GUEST_DEFAULT_MO (0) 29 30 #define TYPE_OPENRISC_CPU "or1k-cpu" 31 32 OBJECT_DECLARE_CPU_TYPE(OpenRISCCPU, OpenRISCCPUClass, OPENRISC_CPU) 33 34 /** 35 * OpenRISCCPUClass: 36 * @parent_realize: The parent class' realize handler. 37 * @parent_reset: The parent class' reset handler. 38 * 39 * A OpenRISC CPU model. 40 */ 41 struct OpenRISCCPUClass { 42 /*< private >*/ 43 CPUClass parent_class; 44 /*< public >*/ 45 46 DeviceRealize parent_realize; 47 DeviceReset parent_reset; 48 }; 49 50 #define TARGET_INSN_START_EXTRA_WORDS 1 51 52 enum { 53 MMU_NOMMU_IDX = 0, 54 MMU_SUPERVISOR_IDX = 1, 55 MMU_USER_IDX = 2, 56 }; 57 58 #define SET_FP_CAUSE(reg, v) do {\ 59 (reg) = ((reg) & ~(0x3f << 12)) | \ 60 ((v & 0x3f) << 12);\ 61 } while (0) 62 #define GET_FP_ENABLE(reg) (((reg) >> 7) & 0x1f) 63 #define UPDATE_FP_FLAGS(reg, v) do {\ 64 (reg) |= ((v & 0x1f) << 2);\ 65 } while (0) 66 67 /* Interrupt */ 68 #define NR_IRQS 32 69 70 /* Unit presece register */ 71 enum { 72 UPR_UP = (1 << 0), 73 UPR_DCP = (1 << 1), 74 UPR_ICP = (1 << 2), 75 UPR_DMP = (1 << 3), 76 UPR_IMP = (1 << 4), 77 UPR_MP = (1 << 5), 78 UPR_DUP = (1 << 6), 79 UPR_PCUR = (1 << 7), 80 UPR_PMP = (1 << 8), 81 UPR_PICP = (1 << 9), 82 UPR_TTP = (1 << 10), 83 UPR_CUP = (255 << 24), 84 }; 85 86 /* CPU configure register */ 87 enum { 88 CPUCFGR_NSGF = (15 << 0), 89 CPUCFGR_CGF = (1 << 4), 90 CPUCFGR_OB32S = (1 << 5), 91 CPUCFGR_OB64S = (1 << 6), 92 CPUCFGR_OF32S = (1 << 7), 93 CPUCFGR_OF64S = (1 << 8), 94 CPUCFGR_OV64S = (1 << 9), 95 CPUCFGR_ND = (1 << 10), 96 CPUCFGR_AVRP = (1 << 11), 97 CPUCFGR_EVBARP = (1 << 12), 98 CPUCFGR_ISRP = (1 << 13), 99 CPUCFGR_AECSRP = (1 << 14), 100 CPUCFGR_OF64A32S = (1 << 15), 101 }; 102 103 /* DMMU configure register */ 104 enum { 105 DMMUCFGR_NTW = (3 << 0), 106 DMMUCFGR_NTS = (7 << 2), 107 DMMUCFGR_NAE = (7 << 5), 108 DMMUCFGR_CRI = (1 << 8), 109 DMMUCFGR_PRI = (1 << 9), 110 DMMUCFGR_TEIRI = (1 << 10), 111 DMMUCFGR_HTR = (1 << 11), 112 }; 113 114 /* IMMU configure register */ 115 enum { 116 IMMUCFGR_NTW = (3 << 0), 117 IMMUCFGR_NTS = (7 << 2), 118 IMMUCFGR_NAE = (7 << 5), 119 IMMUCFGR_CRI = (1 << 8), 120 IMMUCFGR_PRI = (1 << 9), 121 IMMUCFGR_TEIRI = (1 << 10), 122 IMMUCFGR_HTR = (1 << 11), 123 }; 124 125 /* Power management register */ 126 enum { 127 PMR_SDF = (15 << 0), 128 PMR_DME = (1 << 4), 129 PMR_SME = (1 << 5), 130 PMR_DCGE = (1 << 6), 131 PMR_SUME = (1 << 7), 132 }; 133 134 /* Float point control status register */ 135 enum { 136 FPCSR_FPEE = 1, 137 FPCSR_RM = (3 << 1), 138 FPCSR_OVF = (1 << 3), 139 FPCSR_UNF = (1 << 4), 140 FPCSR_SNF = (1 << 5), 141 FPCSR_QNF = (1 << 6), 142 FPCSR_ZF = (1 << 7), 143 FPCSR_IXF = (1 << 8), 144 FPCSR_IVF = (1 << 9), 145 FPCSR_INF = (1 << 10), 146 FPCSR_DZF = (1 << 11), 147 }; 148 149 /* Exceptions indices */ 150 enum { 151 EXCP_RESET = 0x1, 152 EXCP_BUSERR = 0x2, 153 EXCP_DPF = 0x3, 154 EXCP_IPF = 0x4, 155 EXCP_TICK = 0x5, 156 EXCP_ALIGN = 0x6, 157 EXCP_ILLEGAL = 0x7, 158 EXCP_INT = 0x8, 159 EXCP_DTLBMISS = 0x9, 160 EXCP_ITLBMISS = 0xa, 161 EXCP_RANGE = 0xb, 162 EXCP_SYSCALL = 0xc, 163 EXCP_FPE = 0xd, 164 EXCP_TRAP = 0xe, 165 EXCP_NR, 166 }; 167 168 /* Supervisor register */ 169 enum { 170 SR_SM = (1 << 0), 171 SR_TEE = (1 << 1), 172 SR_IEE = (1 << 2), 173 SR_DCE = (1 << 3), 174 SR_ICE = (1 << 4), 175 SR_DME = (1 << 5), 176 SR_IME = (1 << 6), 177 SR_LEE = (1 << 7), 178 SR_CE = (1 << 8), 179 SR_F = (1 << 9), 180 SR_CY = (1 << 10), 181 SR_OV = (1 << 11), 182 SR_OVE = (1 << 12), 183 SR_DSX = (1 << 13), 184 SR_EPH = (1 << 14), 185 SR_FO = (1 << 15), 186 SR_SUMRA = (1 << 16), 187 SR_SCE = (1 << 17), 188 }; 189 190 /* Tick Timer Mode Register */ 191 enum { 192 TTMR_TP = (0xfffffff), 193 TTMR_IP = (1 << 28), 194 TTMR_IE = (1 << 29), 195 TTMR_M = (3 << 30), 196 }; 197 198 /* Timer Mode */ 199 enum { 200 TIMER_NONE = (0 << 30), 201 TIMER_INTR = (1 << 30), 202 TIMER_SHOT = (2 << 30), 203 TIMER_CONT = (3 << 30), 204 }; 205 206 /* TLB size */ 207 enum { 208 TLB_SIZE = 128, 209 TLB_MASK = TLB_SIZE - 1, 210 }; 211 212 /* TLB prot */ 213 enum { 214 URE = (1 << 6), 215 UWE = (1 << 7), 216 SRE = (1 << 8), 217 SWE = (1 << 9), 218 219 SXE = (1 << 6), 220 UXE = (1 << 7), 221 }; 222 223 typedef struct OpenRISCTLBEntry { 224 uint32_t mr; 225 uint32_t tr; 226 } OpenRISCTLBEntry; 227 228 #ifndef CONFIG_USER_ONLY 229 typedef struct CPUOpenRISCTLBContext { 230 OpenRISCTLBEntry itlb[TLB_SIZE]; 231 OpenRISCTLBEntry dtlb[TLB_SIZE]; 232 233 int (*cpu_openrisc_map_address_code)(OpenRISCCPU *cpu, 234 hwaddr *physical, 235 int *prot, 236 target_ulong address, int rw); 237 int (*cpu_openrisc_map_address_data)(OpenRISCCPU *cpu, 238 hwaddr *physical, 239 int *prot, 240 target_ulong address, int rw); 241 } CPUOpenRISCTLBContext; 242 #endif 243 244 typedef struct CPUArchState { 245 target_ulong shadow_gpr[16][32]; /* Shadow registers */ 246 247 target_ulong pc; /* Program counter */ 248 target_ulong ppc; /* Prev PC */ 249 target_ulong jmp_pc; /* Jump PC */ 250 251 uint64_t mac; /* Multiply registers MACHI:MACLO */ 252 253 target_ulong epcr; /* Exception PC register */ 254 target_ulong eear; /* Exception EA register */ 255 256 target_ulong sr_f; /* the SR_F bit, values 0, 1. */ 257 target_ulong sr_cy; /* the SR_CY bit, values 0, 1. */ 258 target_long sr_ov; /* the SR_OV bit (in the sign bit only) */ 259 uint32_t sr; /* Supervisor register, without SR_{F,CY,OV} */ 260 uint32_t esr; /* Exception supervisor register */ 261 uint32_t evbar; /* Exception vector base address register */ 262 uint32_t pmr; /* Power Management Register */ 263 uint32_t fpcsr; /* Float register */ 264 float_status fp_status; 265 266 target_ulong lock_addr; 267 target_ulong lock_value; 268 269 uint32_t dflag; /* In delay slot (boolean) */ 270 271 #ifndef CONFIG_USER_ONLY 272 CPUOpenRISCTLBContext tlb; 273 #endif 274 275 /* Fields up to this point are cleared by a CPU reset */ 276 struct {} end_reset_fields; 277 278 /* Fields from here on are preserved across CPU reset. */ 279 uint32_t vr; /* Version register */ 280 uint32_t vr2; /* Version register 2 */ 281 uint32_t avr; /* Architecture version register */ 282 uint32_t upr; /* Unit presence register */ 283 uint32_t cpucfgr; /* CPU configure register */ 284 uint32_t dmmucfgr; /* DMMU configure register */ 285 uint32_t immucfgr; /* IMMU configure register */ 286 287 #ifndef CONFIG_USER_ONLY 288 QEMUTimer *timer; 289 uint32_t ttmr; /* Timer tick mode register */ 290 int is_counting; 291 292 uint32_t picmr; /* Interrupt mask register */ 293 uint32_t picsr; /* Interrupt contrl register*/ 294 #endif 295 } CPUOpenRISCState; 296 297 /** 298 * OpenRISCCPU: 299 * @env: #CPUOpenRISCState 300 * 301 * A OpenRISC CPU. 302 */ 303 struct ArchCPU { 304 /*< private >*/ 305 CPUState parent_obj; 306 /*< public >*/ 307 308 CPUNegativeOffsetState neg; 309 CPUOpenRISCState env; 310 }; 311 312 313 void cpu_openrisc_list(void); 314 void openrisc_cpu_dump_state(CPUState *cpu, FILE *f, int flags); 315 hwaddr openrisc_cpu_get_phys_page_debug(CPUState *cpu, vaddr addr); 316 int openrisc_cpu_gdb_read_register(CPUState *cpu, GByteArray *buf, int reg); 317 int openrisc_cpu_gdb_write_register(CPUState *cpu, uint8_t *buf, int reg); 318 void openrisc_translate_init(void); 319 int print_insn_or1k(bfd_vma addr, disassemble_info *info); 320 321 #define cpu_list cpu_openrisc_list 322 323 #ifndef CONFIG_USER_ONLY 324 bool openrisc_cpu_tlb_fill(CPUState *cs, vaddr address, int size, 325 MMUAccessType access_type, int mmu_idx, 326 bool probe, uintptr_t retaddr); 327 328 extern const VMStateDescription vmstate_openrisc_cpu; 329 330 void openrisc_cpu_do_interrupt(CPUState *cpu); 331 bool openrisc_cpu_exec_interrupt(CPUState *cpu, int int_req); 332 333 /* hw/openrisc_pic.c */ 334 void cpu_openrisc_pic_init(OpenRISCCPU *cpu); 335 336 /* hw/openrisc_timer.c */ 337 void cpu_openrisc_clock_init(OpenRISCCPU *cpu); 338 uint32_t cpu_openrisc_count_get(OpenRISCCPU *cpu); 339 void cpu_openrisc_count_set(OpenRISCCPU *cpu, uint32_t val); 340 void cpu_openrisc_count_update(OpenRISCCPU *cpu); 341 void cpu_openrisc_timer_update(OpenRISCCPU *cpu); 342 void cpu_openrisc_count_start(OpenRISCCPU *cpu); 343 void cpu_openrisc_count_stop(OpenRISCCPU *cpu); 344 #endif 345 346 #define OPENRISC_CPU_TYPE_SUFFIX "-" TYPE_OPENRISC_CPU 347 #define OPENRISC_CPU_TYPE_NAME(model) model OPENRISC_CPU_TYPE_SUFFIX 348 #define CPU_RESOLVING_TYPE TYPE_OPENRISC_CPU 349 350 #include "exec/cpu-all.h" 351 352 #define TB_FLAGS_SM SR_SM 353 #define TB_FLAGS_DME SR_DME 354 #define TB_FLAGS_IME SR_IME 355 #define TB_FLAGS_OVE SR_OVE 356 #define TB_FLAGS_DFLAG 2 /* reuse SR_TEE */ 357 #define TB_FLAGS_R0_0 4 /* reuse SR_IEE */ 358 359 static inline uint32_t cpu_get_gpr(const CPUOpenRISCState *env, int i) 360 { 361 return env->shadow_gpr[0][i]; 362 } 363 364 static inline void cpu_set_gpr(CPUOpenRISCState *env, int i, uint32_t val) 365 { 366 env->shadow_gpr[0][i] = val; 367 } 368 369 static inline void cpu_get_tb_cpu_state(CPUOpenRISCState *env, 370 target_ulong *pc, 371 target_ulong *cs_base, uint32_t *flags) 372 { 373 *pc = env->pc; 374 *cs_base = 0; 375 *flags = (env->dflag ? TB_FLAGS_DFLAG : 0) 376 | (cpu_get_gpr(env, 0) ? 0 : TB_FLAGS_R0_0) 377 | (env->sr & (SR_SM | SR_DME | SR_IME | SR_OVE)); 378 } 379 380 static inline int cpu_mmu_index(CPUOpenRISCState *env, bool ifetch) 381 { 382 int ret = MMU_NOMMU_IDX; /* mmu is disabled */ 383 384 if (env->sr & (ifetch ? SR_IME : SR_DME)) { 385 /* The mmu is enabled; test supervisor state. */ 386 ret = env->sr & SR_SM ? MMU_SUPERVISOR_IDX : MMU_USER_IDX; 387 } 388 389 return ret; 390 } 391 392 static inline uint32_t cpu_get_sr(const CPUOpenRISCState *env) 393 { 394 return (env->sr 395 + env->sr_f * SR_F 396 + env->sr_cy * SR_CY 397 + (env->sr_ov < 0) * SR_OV); 398 } 399 400 static inline void cpu_set_sr(CPUOpenRISCState *env, uint32_t val) 401 { 402 env->sr_f = (val & SR_F) != 0; 403 env->sr_cy = (val & SR_CY) != 0; 404 env->sr_ov = (val & SR_OV ? -1 : 0); 405 env->sr = (val & ~(SR_F | SR_CY | SR_OV)) | SR_FO; 406 } 407 408 void cpu_set_fpcsr(CPUOpenRISCState *env, uint32_t val); 409 410 #define CPU_INTERRUPT_TIMER CPU_INTERRUPT_TGT_INT_0 411 412 #endif /* OPENRISC_CPU_H */ 413