1 /* 2 * MicroBlaze virtual CPU header 3 * 4 * Copyright (c) 2009 Edgar E. Iglesias 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 * 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 MICROBLAZE_CPU_H 21 #define MICROBLAZE_CPU_H 22 23 #include "cpu-qom.h" 24 #include "exec/cpu-defs.h" 25 #include "qemu/cpu-float.h" 26 27 typedef struct CPUArchState CPUMBState; 28 #if !defined(CONFIG_USER_ONLY) 29 #include "mmu.h" 30 #endif 31 32 #define EXCP_MMU 1 33 #define EXCP_IRQ 2 34 #define EXCP_SYSCALL 3 /* user-only */ 35 #define EXCP_HW_BREAK 4 36 #define EXCP_HW_EXCP 5 37 38 /* MicroBlaze-specific interrupt pending bits. */ 39 #define CPU_INTERRUPT_NMI CPU_INTERRUPT_TGT_EXT_3 40 41 /* Meanings of the MBCPU object's two inbound GPIO lines */ 42 #define MB_CPU_IRQ 0 43 #define MB_CPU_FIR 1 44 45 /* Register aliases. R0 - R15 */ 46 #define R_SP 1 47 #define SR_PC 0 48 #define SR_MSR 1 49 #define SR_EAR 3 50 #define SR_ESR 5 51 #define SR_FSR 7 52 #define SR_BTR 0xb 53 #define SR_EDR 0xd 54 55 /* MSR flags. */ 56 #define MSR_BE (1<<0) /* 0x001 */ 57 #define MSR_IE (1<<1) /* 0x002 */ 58 #define MSR_C (1<<2) /* 0x004 */ 59 #define MSR_BIP (1<<3) /* 0x008 */ 60 #define MSR_FSL (1<<4) /* 0x010 */ 61 #define MSR_ICE (1<<5) /* 0x020 */ 62 #define MSR_DZ (1<<6) /* 0x040 */ 63 #define MSR_DCE (1<<7) /* 0x080 */ 64 #define MSR_EE (1<<8) /* 0x100 */ 65 #define MSR_EIP (1<<9) /* 0x200 */ 66 #define MSR_PVR (1<<10) /* 0x400 */ 67 #define MSR_CC (1<<31) 68 69 /* Machine State Register (MSR) Fields */ 70 #define MSR_UM (1<<11) /* User Mode */ 71 #define MSR_UMS (1<<12) /* User Mode Save */ 72 #define MSR_VM (1<<13) /* Virtual Mode */ 73 #define MSR_VMS (1<<14) /* Virtual Mode Save */ 74 75 #define MSR_KERNEL MSR_EE|MSR_VM 76 //#define MSR_USER MSR_KERNEL|MSR_UM|MSR_IE 77 #define MSR_KERNEL_VMS MSR_EE|MSR_VMS 78 //#define MSR_USER_VMS MSR_KERNEL_VMS|MSR_UMS|MSR_IE 79 80 /* Exception State Register (ESR) Fields */ 81 #define ESR_DIZ (1<<11) /* Zone Protection */ 82 #define ESR_W (1<<11) /* Unaligned word access */ 83 #define ESR_S (1<<10) /* Store instruction */ 84 85 #define ESR_ESS_FSL_OFFSET 5 86 87 #define ESR_ESS_MASK (0x7f << 5) 88 89 #define ESR_EC_FSL 0 90 #define ESR_EC_UNALIGNED_DATA 1 91 #define ESR_EC_ILLEGAL_OP 2 92 #define ESR_EC_INSN_BUS 3 93 #define ESR_EC_DATA_BUS 4 94 #define ESR_EC_DIVZERO 5 95 #define ESR_EC_FPU 6 96 #define ESR_EC_PRIVINSN 7 97 #define ESR_EC_STACKPROT 7 /* Same as PRIVINSN. */ 98 #define ESR_EC_DATA_STORAGE 8 99 #define ESR_EC_INSN_STORAGE 9 100 #define ESR_EC_DATA_TLB 10 101 #define ESR_EC_INSN_TLB 11 102 #define ESR_EC_MASK 31 103 104 /* Floating Point Status Register (FSR) Bits */ 105 #define FSR_IO (1<<4) /* Invalid operation */ 106 #define FSR_DZ (1<<3) /* Divide-by-zero */ 107 #define FSR_OF (1<<2) /* Overflow */ 108 #define FSR_UF (1<<1) /* Underflow */ 109 #define FSR_DO (1<<0) /* Denormalized operand error */ 110 111 /* Version reg. */ 112 /* Basic PVR mask */ 113 #define PVR0_PVR_FULL_MASK 0x80000000 114 #define PVR0_USE_BARREL_MASK 0x40000000 115 #define PVR0_USE_DIV_MASK 0x20000000 116 #define PVR0_USE_HW_MUL_MASK 0x10000000 117 #define PVR0_USE_FPU_MASK 0x08000000 118 #define PVR0_USE_EXC_MASK 0x04000000 119 #define PVR0_USE_ICACHE_MASK 0x02000000 120 #define PVR0_USE_DCACHE_MASK 0x01000000 121 #define PVR0_USE_MMU_MASK 0x00800000 122 #define PVR0_USE_BTC 0x00400000 123 #define PVR0_ENDI_MASK 0x00200000 124 #define PVR0_FAULT 0x00100000 125 #define PVR0_VERSION_MASK 0x0000FF00 126 #define PVR0_USER1_MASK 0x000000FF 127 #define PVR0_SPROT_MASK 0x00000001 128 129 #define PVR0_VERSION_SHIFT 8 130 131 /* User 2 PVR mask */ 132 #define PVR1_USER2_MASK 0xFFFFFFFF 133 134 /* Configuration PVR masks */ 135 #define PVR2_D_OPB_MASK 0x80000000 136 #define PVR2_D_LMB_MASK 0x40000000 137 #define PVR2_I_OPB_MASK 0x20000000 138 #define PVR2_I_LMB_MASK 0x10000000 139 #define PVR2_INTERRUPT_IS_EDGE_MASK 0x08000000 140 #define PVR2_EDGE_IS_POSITIVE_MASK 0x04000000 141 #define PVR2_D_PLB_MASK 0x02000000 /* new */ 142 #define PVR2_I_PLB_MASK 0x01000000 /* new */ 143 #define PVR2_INTERCONNECT 0x00800000 /* new */ 144 #define PVR2_USE_EXTEND_FSL 0x00080000 /* new */ 145 #define PVR2_USE_FSL_EXC 0x00040000 /* new */ 146 #define PVR2_USE_MSR_INSTR 0x00020000 147 #define PVR2_USE_PCMP_INSTR 0x00010000 148 #define PVR2_AREA_OPTIMISED 0x00008000 149 #define PVR2_USE_BARREL_MASK 0x00004000 150 #define PVR2_USE_DIV_MASK 0x00002000 151 #define PVR2_USE_HW_MUL_MASK 0x00001000 152 #define PVR2_USE_FPU_MASK 0x00000800 153 #define PVR2_USE_MUL64_MASK 0x00000400 154 #define PVR2_USE_FPU2_MASK 0x00000200 /* new */ 155 #define PVR2_USE_IPLBEXC 0x00000100 156 #define PVR2_USE_DPLBEXC 0x00000080 157 #define PVR2_OPCODE_0x0_ILL_MASK 0x00000040 158 #define PVR2_UNALIGNED_EXC_MASK 0x00000020 159 #define PVR2_ILL_OPCODE_EXC_MASK 0x00000010 160 #define PVR2_IOPB_BUS_EXC_MASK 0x00000008 161 #define PVR2_DOPB_BUS_EXC_MASK 0x00000004 162 #define PVR2_DIV_ZERO_EXC_MASK 0x00000002 163 #define PVR2_FPU_EXC_MASK 0x00000001 164 165 /* Debug and exception PVR masks */ 166 #define PVR3_DEBUG_ENABLED_MASK 0x80000000 167 #define PVR3_NUMBER_OF_PC_BRK_MASK 0x1E000000 168 #define PVR3_NUMBER_OF_RD_ADDR_BRK_MASK 0x00380000 169 #define PVR3_NUMBER_OF_WR_ADDR_BRK_MASK 0x0000E000 170 #define PVR3_FSL_LINKS_MASK 0x00000380 171 172 /* ICache config PVR masks */ 173 #define PVR4_USE_ICACHE_MASK 0x80000000 174 #define PVR4_ICACHE_ADDR_TAG_BITS_MASK 0x7C000000 175 #define PVR4_ICACHE_USE_FSL_MASK 0x02000000 176 #define PVR4_ICACHE_ALLOW_WR_MASK 0x01000000 177 #define PVR4_ICACHE_LINE_LEN_MASK 0x00E00000 178 #define PVR4_ICACHE_BYTE_SIZE_MASK 0x001F0000 179 180 /* DCache config PVR masks */ 181 #define PVR5_USE_DCACHE_MASK 0x80000000 182 #define PVR5_DCACHE_ADDR_TAG_BITS_MASK 0x7C000000 183 #define PVR5_DCACHE_USE_FSL_MASK 0x02000000 184 #define PVR5_DCACHE_ALLOW_WR_MASK 0x01000000 185 #define PVR5_DCACHE_LINE_LEN_MASK 0x00E00000 186 #define PVR5_DCACHE_BYTE_SIZE_MASK 0x001F0000 187 #define PVR5_DCACHE_WRITEBACK_MASK 0x00004000 188 189 /* ICache base address PVR mask */ 190 #define PVR6_ICACHE_BASEADDR_MASK 0xFFFFFFFF 191 192 /* ICache high address PVR mask */ 193 #define PVR7_ICACHE_HIGHADDR_MASK 0xFFFFFFFF 194 195 /* DCache base address PVR mask */ 196 #define PVR8_DCACHE_BASEADDR_MASK 0xFFFFFFFF 197 198 /* DCache high address PVR mask */ 199 #define PVR9_DCACHE_HIGHADDR_MASK 0xFFFFFFFF 200 201 /* Target family PVR mask */ 202 #define PVR10_TARGET_FAMILY_MASK 0xFF000000 203 #define PVR10_ASIZE_SHIFT 18 204 205 /* MMU descrtiption */ 206 #define PVR11_USE_MMU 0xC0000000 207 #define PVR11_MMU_ITLB_SIZE 0x38000000 208 #define PVR11_MMU_DTLB_SIZE 0x07000000 209 #define PVR11_MMU_TLB_ACCESS 0x00C00000 210 #define PVR11_MMU_ZONES 0x003E0000 211 /* MSR Reset value PVR mask */ 212 #define PVR11_MSR_RESET_VALUE_MASK 0x000007FF 213 214 #define C_PVR_NONE 0 215 #define C_PVR_BASIC 1 216 #define C_PVR_FULL 2 217 218 /* CPU flags. */ 219 220 /* Condition codes. */ 221 #define CC_GE 5 222 #define CC_GT 4 223 #define CC_LE 3 224 #define CC_LT 2 225 #define CC_NE 1 226 #define CC_EQ 0 227 228 #define STREAM_EXCEPTION (1 << 0) 229 #define STREAM_ATOMIC (1 << 1) 230 #define STREAM_TEST (1 << 2) 231 #define STREAM_CONTROL (1 << 3) 232 #define STREAM_NONBLOCK (1 << 4) 233 234 #define TARGET_INSN_START_EXTRA_WORDS 1 235 236 /* use-non-secure property masks */ 237 #define USE_NON_SECURE_M_AXI_DP_MASK 0x1 238 #define USE_NON_SECURE_M_AXI_IP_MASK 0x2 239 #define USE_NON_SECURE_M_AXI_DC_MASK 0x4 240 #define USE_NON_SECURE_M_AXI_IC_MASK 0x8 241 242 struct CPUArchState { 243 uint32_t bvalue; /* TCG temporary, only valid during a TB */ 244 uint32_t btarget; /* Full resolved branch destination */ 245 246 uint32_t imm; 247 uint32_t regs[32]; 248 uint32_t pc; 249 uint32_t msr; /* All bits of MSR except MSR[C] and MSR[CC] */ 250 uint32_t msr_c; /* MSR[C], in low bit; other bits must be 0 */ 251 target_ulong ear; 252 uint32_t esr; 253 uint32_t fsr; 254 uint32_t btr; 255 uint32_t edr; 256 float_status fp_status; 257 /* Stack protectors. Yes, it's a hw feature. */ 258 uint32_t slr, shr; 259 260 /* lwx/swx reserved address */ 261 #define RES_ADDR_NONE 0xffffffff /* Use 0xffffffff to indicate no reservation */ 262 target_ulong res_addr; 263 uint32_t res_val; 264 265 /* Internal flags. */ 266 #define IMM_FLAG (1 << 0) 267 #define BIMM_FLAG (1 << 1) 268 #define ESR_ESS_FLAG (1 << 2) /* indicates ESR_ESS_MASK is present */ 269 /* MSR_EE (1 << 8) -- these 3 are not in iflags but tb_flags */ 270 /* MSR_UM (1 << 11) */ 271 /* MSR_VM (1 << 13) */ 272 /* ESR_ESS_MASK [11:5] -- unwind into iflags for unaligned excp */ 273 #define D_FLAG (1 << 12) /* Bit in ESR. */ 274 #define DRTI_FLAG (1 << 16) 275 #define DRTE_FLAG (1 << 17) 276 #define DRTB_FLAG (1 << 18) 277 278 /* TB dependent CPUMBState. */ 279 #define IFLAGS_TB_MASK (D_FLAG | BIMM_FLAG | IMM_FLAG | \ 280 DRTI_FLAG | DRTE_FLAG | DRTB_FLAG) 281 #define MSR_TB_MASK (MSR_UM | MSR_VM | MSR_EE) 282 283 uint32_t iflags; 284 285 #if !defined(CONFIG_USER_ONLY) 286 /* Unified MMU. */ 287 MicroBlazeMMU mmu; 288 #endif 289 290 /* Fields up to this point are cleared by a CPU reset */ 291 struct {} end_reset_fields; 292 293 /* These fields are preserved on reset. */ 294 }; 295 296 /* 297 * Microblaze Configuration Settings 298 * 299 * Note that the structure is sorted by type and size to minimize holes. 300 */ 301 typedef struct { 302 char *version; 303 304 uint64_t addr_mask; 305 306 uint32_t base_vectors; 307 uint32_t pvr_user2; 308 uint32_t pvr_regs[13]; 309 310 uint8_t addr_size; 311 uint8_t use_fpu; 312 uint8_t use_hw_mul; 313 uint8_t pvr_user1; 314 uint8_t pvr; 315 uint8_t mmu; 316 uint8_t mmu_tlb_access; 317 uint8_t mmu_zones; 318 319 bool stackprot; 320 bool use_barrel; 321 bool use_div; 322 bool use_msr_instr; 323 bool use_pcmp_instr; 324 bool use_mmu; 325 uint8_t use_non_secure; 326 bool dcache_writeback; 327 bool endi; 328 bool dopb_bus_exception; 329 bool iopb_bus_exception; 330 bool illegal_opcode_exception; 331 bool opcode_0_illegal; 332 bool div_zero_exception; 333 bool unaligned_exceptions; 334 } MicroBlazeCPUConfig; 335 336 /** 337 * MicroBlazeCPU: 338 * @env: #CPUMBState 339 * 340 * A MicroBlaze CPU. 341 */ 342 struct ArchCPU { 343 /*< private >*/ 344 CPUState parent_obj; 345 346 /*< public >*/ 347 bool ns_axi_dp; 348 bool ns_axi_ip; 349 bool ns_axi_dc; 350 bool ns_axi_ic; 351 352 CPUNegativeOffsetState neg; 353 CPUMBState env; 354 MicroBlazeCPUConfig cfg; 355 }; 356 357 358 #ifndef CONFIG_USER_ONLY 359 void mb_cpu_do_interrupt(CPUState *cs); 360 bool mb_cpu_exec_interrupt(CPUState *cs, int int_req); 361 #endif /* !CONFIG_USER_ONLY */ 362 void mb_cpu_do_unaligned_access(CPUState *cs, vaddr vaddr, 363 MMUAccessType access_type, 364 int mmu_idx, uintptr_t retaddr) QEMU_NORETURN; 365 void mb_cpu_dump_state(CPUState *cpu, FILE *f, int flags); 366 hwaddr mb_cpu_get_phys_page_attrs_debug(CPUState *cpu, vaddr addr, 367 MemTxAttrs *attrs); 368 int mb_cpu_gdb_read_register(CPUState *cpu, GByteArray *buf, int reg); 369 int mb_cpu_gdb_write_register(CPUState *cpu, uint8_t *buf, int reg); 370 371 static inline uint32_t mb_cpu_read_msr(const CPUMBState *env) 372 { 373 /* Replicate MSR[C] to MSR[CC]. */ 374 return env->msr | (env->msr_c * (MSR_C | MSR_CC)); 375 } 376 377 static inline void mb_cpu_write_msr(CPUMBState *env, uint32_t val) 378 { 379 env->msr_c = (val >> 2) & 1; 380 /* 381 * Clear both MSR[C] and MSR[CC] from the saved copy. 382 * MSR_PVR is not writable and is always clear. 383 */ 384 env->msr = val & ~(MSR_C | MSR_CC | MSR_PVR); 385 } 386 387 void mb_tcg_init(void); 388 389 #define CPU_RESOLVING_TYPE TYPE_MICROBLAZE_CPU 390 391 /* MMU modes definitions */ 392 #define MMU_NOMMU_IDX 0 393 #define MMU_KERNEL_IDX 1 394 #define MMU_USER_IDX 2 395 /* See NB_MMU_MODES further up the file. */ 396 397 #include "exec/cpu-all.h" 398 399 /* Ensure there is no overlap between the two masks. */ 400 QEMU_BUILD_BUG_ON(MSR_TB_MASK & IFLAGS_TB_MASK); 401 402 static inline void cpu_get_tb_cpu_state(CPUMBState *env, target_ulong *pc, 403 target_ulong *cs_base, uint32_t *flags) 404 { 405 *pc = env->pc; 406 *flags = (env->iflags & IFLAGS_TB_MASK) | (env->msr & MSR_TB_MASK); 407 *cs_base = (*flags & IMM_FLAG ? env->imm : 0); 408 } 409 410 #if !defined(CONFIG_USER_ONLY) 411 bool mb_cpu_tlb_fill(CPUState *cs, vaddr address, int size, 412 MMUAccessType access_type, int mmu_idx, 413 bool probe, uintptr_t retaddr); 414 415 void mb_cpu_transaction_failed(CPUState *cs, hwaddr physaddr, vaddr addr, 416 unsigned size, MMUAccessType access_type, 417 int mmu_idx, MemTxAttrs attrs, 418 MemTxResult response, uintptr_t retaddr); 419 #endif 420 421 static inline int cpu_mmu_index(CPUMBState *env, bool ifetch) 422 { 423 MicroBlazeCPU *cpu = env_archcpu(env); 424 425 /* Are we in nommu mode?. */ 426 if (!(env->msr & MSR_VM) || !cpu->cfg.use_mmu) { 427 return MMU_NOMMU_IDX; 428 } 429 430 if (env->msr & MSR_UM) { 431 return MMU_USER_IDX; 432 } 433 return MMU_KERNEL_IDX; 434 } 435 436 #ifndef CONFIG_USER_ONLY 437 extern const VMStateDescription vmstate_mb_cpu; 438 #endif 439 440 #endif 441