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 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 "fpu/softfloat-types.h" 26 27 typedef struct CPUMBState 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 struct CPUMBState { 237 uint32_t bvalue; /* TCG temporary, only valid during a TB */ 238 uint32_t btarget; /* Full resolved branch destination */ 239 240 uint32_t imm; 241 uint32_t regs[32]; 242 uint32_t pc; 243 uint32_t msr; /* All bits of MSR except MSR[C] and MSR[CC] */ 244 uint32_t msr_c; /* MSR[C], in low bit; other bits must be 0 */ 245 target_ulong ear; 246 uint32_t esr; 247 uint32_t fsr; 248 uint32_t btr; 249 uint32_t edr; 250 float_status fp_status; 251 /* Stack protectors. Yes, it's a hw feature. */ 252 uint32_t slr, shr; 253 254 /* lwx/swx reserved address */ 255 #define RES_ADDR_NONE 0xffffffff /* Use 0xffffffff to indicate no reservation */ 256 target_ulong res_addr; 257 uint32_t res_val; 258 259 /* Internal flags. */ 260 #define IMM_FLAG (1 << 0) 261 #define BIMM_FLAG (1 << 1) 262 #define ESR_ESS_FLAG (1 << 2) /* indicates ESR_ESS_MASK is present */ 263 /* MSR_EE (1 << 8) -- these 3 are not in iflags but tb_flags */ 264 /* MSR_UM (1 << 11) */ 265 /* MSR_VM (1 << 13) */ 266 /* ESR_ESS_MASK [11:5] -- unwind into iflags for unaligned excp */ 267 #define DRTI_FLAG (1 << 16) 268 #define DRTE_FLAG (1 << 17) 269 #define DRTB_FLAG (1 << 18) 270 #define D_FLAG (1 << 19) /* Bit in ESR. */ 271 272 /* TB dependent CPUMBState. */ 273 #define IFLAGS_TB_MASK (D_FLAG | BIMM_FLAG | IMM_FLAG | \ 274 DRTI_FLAG | DRTE_FLAG | DRTB_FLAG) 275 #define MSR_TB_MASK (MSR_UM | MSR_VM | MSR_EE) 276 277 uint32_t iflags; 278 279 #if !defined(CONFIG_USER_ONLY) 280 /* Unified MMU. */ 281 struct microblaze_mmu mmu; 282 #endif 283 284 /* Fields up to this point are cleared by a CPU reset */ 285 struct {} end_reset_fields; 286 287 /* These fields are preserved on reset. */ 288 289 struct { 290 uint32_t regs[13]; 291 } pvr; 292 }; 293 294 /** 295 * MicroBlazeCPU: 296 * @env: #CPUMBState 297 * 298 * A MicroBlaze CPU. 299 */ 300 struct MicroBlazeCPU { 301 /*< private >*/ 302 CPUState parent_obj; 303 304 /*< public >*/ 305 306 CPUNegativeOffsetState neg; 307 CPUMBState env; 308 309 /* Microblaze Configuration Settings */ 310 struct { 311 bool stackprot; 312 uint32_t base_vectors; 313 uint8_t addr_size; 314 uint8_t use_fpu; 315 uint8_t use_hw_mul; 316 bool use_barrel; 317 bool use_div; 318 bool use_msr_instr; 319 bool use_pcmp_instr; 320 bool use_mmu; 321 bool dcache_writeback; 322 bool endi; 323 bool dopb_bus_exception; 324 bool iopb_bus_exception; 325 bool illegal_opcode_exception; 326 bool opcode_0_illegal; 327 bool div_zero_exception; 328 bool unaligned_exceptions; 329 uint8_t pvr_user1; 330 uint32_t pvr_user2; 331 char *version; 332 uint8_t pvr; 333 } cfg; 334 }; 335 336 337 void mb_cpu_do_interrupt(CPUState *cs); 338 bool mb_cpu_exec_interrupt(CPUState *cs, int int_req); 339 void mb_cpu_do_unaligned_access(CPUState *cs, vaddr vaddr, 340 MMUAccessType access_type, 341 int mmu_idx, uintptr_t retaddr); 342 void mb_cpu_dump_state(CPUState *cpu, FILE *f, int flags); 343 hwaddr mb_cpu_get_phys_page_debug(CPUState *cpu, vaddr addr); 344 int mb_cpu_gdb_read_register(CPUState *cpu, GByteArray *buf, int reg); 345 int mb_cpu_gdb_write_register(CPUState *cpu, uint8_t *buf, int reg); 346 347 static inline uint32_t mb_cpu_read_msr(const CPUMBState *env) 348 { 349 /* Replicate MSR[C] to MSR[CC]. */ 350 return env->msr | (env->msr_c * (MSR_C | MSR_CC)); 351 } 352 353 static inline void mb_cpu_write_msr(CPUMBState *env, uint32_t val) 354 { 355 env->msr_c = (val >> 2) & 1; 356 /* 357 * Clear both MSR[C] and MSR[CC] from the saved copy. 358 * MSR_PVR is not writable and is always clear. 359 */ 360 env->msr = val & ~(MSR_C | MSR_CC | MSR_PVR); 361 } 362 363 void mb_tcg_init(void); 364 /* you can call this signal handler from your SIGBUS and SIGSEGV 365 signal handlers to inform the virtual CPU of exceptions. non zero 366 is returned if the signal was handled by the virtual CPU. */ 367 int cpu_mb_signal_handler(int host_signum, void *pinfo, 368 void *puc); 369 370 #define CPU_RESOLVING_TYPE TYPE_MICROBLAZE_CPU 371 372 #define cpu_signal_handler cpu_mb_signal_handler 373 374 /* MMU modes definitions */ 375 #define MMU_NOMMU_IDX 0 376 #define MMU_KERNEL_IDX 1 377 #define MMU_USER_IDX 2 378 /* See NB_MMU_MODES further up the file. */ 379 380 bool mb_cpu_tlb_fill(CPUState *cs, vaddr address, int size, 381 MMUAccessType access_type, int mmu_idx, 382 bool probe, uintptr_t retaddr); 383 384 typedef CPUMBState CPUArchState; 385 typedef MicroBlazeCPU ArchCPU; 386 387 #include "exec/cpu-all.h" 388 389 /* Ensure there is no overlap between the two masks. */ 390 QEMU_BUILD_BUG_ON(MSR_TB_MASK & IFLAGS_TB_MASK); 391 392 static inline void cpu_get_tb_cpu_state(CPUMBState *env, target_ulong *pc, 393 target_ulong *cs_base, uint32_t *flags) 394 { 395 *pc = env->pc; 396 *flags = (env->iflags & IFLAGS_TB_MASK) | (env->msr & MSR_TB_MASK); 397 *cs_base = (*flags & IMM_FLAG ? env->imm : 0); 398 } 399 400 #if !defined(CONFIG_USER_ONLY) 401 void mb_cpu_transaction_failed(CPUState *cs, hwaddr physaddr, vaddr addr, 402 unsigned size, MMUAccessType access_type, 403 int mmu_idx, MemTxAttrs attrs, 404 MemTxResult response, uintptr_t retaddr); 405 #endif 406 407 static inline int cpu_mmu_index(CPUMBState *env, bool ifetch) 408 { 409 MicroBlazeCPU *cpu = env_archcpu(env); 410 411 /* Are we in nommu mode?. */ 412 if (!(env->msr & MSR_VM) || !cpu->cfg.use_mmu) { 413 return MMU_NOMMU_IDX; 414 } 415 416 if (env->msr & MSR_UM) { 417 return MMU_USER_IDX; 418 } 419 return MMU_KERNEL_IDX; 420 } 421 422 #endif 423