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 "qemu-common.h" 24 #include "cpu-qom.h" 25 26 #define TARGET_LONG_BITS 32 27 28 #define CPUArchState struct CPUMBState 29 30 #include "exec/cpu-defs.h" 31 #include "fpu/softfloat.h" 32 struct CPUMBState; 33 typedef struct CPUMBState CPUMBState; 34 #if !defined(CONFIG_USER_ONLY) 35 #include "mmu.h" 36 #endif 37 38 #define EXCP_MMU 1 39 #define EXCP_IRQ 2 40 #define EXCP_BREAK 3 41 #define EXCP_HW_BREAK 4 42 #define EXCP_HW_EXCP 5 43 44 /* MicroBlaze-specific interrupt pending bits. */ 45 #define CPU_INTERRUPT_NMI CPU_INTERRUPT_TGT_EXT_3 46 47 /* Meanings of the MBCPU object's two inbound GPIO lines */ 48 #define MB_CPU_IRQ 0 49 #define MB_CPU_FIR 1 50 51 /* Register aliases. R0 - R15 */ 52 #define R_SP 1 53 #define SR_PC 0 54 #define SR_MSR 1 55 #define SR_EAR 3 56 #define SR_ESR 5 57 #define SR_FSR 7 58 #define SR_BTR 0xb 59 #define SR_EDR 0xd 60 61 /* MSR flags. */ 62 #define MSR_BE (1<<0) /* 0x001 */ 63 #define MSR_IE (1<<1) /* 0x002 */ 64 #define MSR_C (1<<2) /* 0x004 */ 65 #define MSR_BIP (1<<3) /* 0x008 */ 66 #define MSR_FSL (1<<4) /* 0x010 */ 67 #define MSR_ICE (1<<5) /* 0x020 */ 68 #define MSR_DZ (1<<6) /* 0x040 */ 69 #define MSR_DCE (1<<7) /* 0x080 */ 70 #define MSR_EE (1<<8) /* 0x100 */ 71 #define MSR_EIP (1<<9) /* 0x200 */ 72 #define MSR_PVR (1<<10) /* 0x400 */ 73 #define MSR_CC (1<<31) 74 75 /* Machine State Register (MSR) Fields */ 76 #define MSR_UM (1<<11) /* User Mode */ 77 #define MSR_UMS (1<<12) /* User Mode Save */ 78 #define MSR_VM (1<<13) /* Virtual Mode */ 79 #define MSR_VMS (1<<14) /* Virtual Mode Save */ 80 81 #define MSR_KERNEL MSR_EE|MSR_VM 82 //#define MSR_USER MSR_KERNEL|MSR_UM|MSR_IE 83 #define MSR_KERNEL_VMS MSR_EE|MSR_VMS 84 //#define MSR_USER_VMS MSR_KERNEL_VMS|MSR_UMS|MSR_IE 85 86 /* Exception State Register (ESR) Fields */ 87 #define ESR_DIZ (1<<11) /* Zone Protection */ 88 #define ESR_S (1<<10) /* Store instruction */ 89 90 #define ESR_ESS_FSL_OFFSET 5 91 92 #define ESR_EC_FSL 0 93 #define ESR_EC_UNALIGNED_DATA 1 94 #define ESR_EC_ILLEGAL_OP 2 95 #define ESR_EC_INSN_BUS 3 96 #define ESR_EC_DATA_BUS 4 97 #define ESR_EC_DIVZERO 5 98 #define ESR_EC_FPU 6 99 #define ESR_EC_PRIVINSN 7 100 #define ESR_EC_STACKPROT 7 /* Same as PRIVINSN. */ 101 #define ESR_EC_DATA_STORAGE 8 102 #define ESR_EC_INSN_STORAGE 9 103 #define ESR_EC_DATA_TLB 10 104 #define ESR_EC_INSN_TLB 11 105 #define ESR_EC_MASK 31 106 107 /* Floating Point Status Register (FSR) Bits */ 108 #define FSR_IO (1<<4) /* Invalid operation */ 109 #define FSR_DZ (1<<3) /* Divide-by-zero */ 110 #define FSR_OF (1<<2) /* Overflow */ 111 #define FSR_UF (1<<1) /* Underflow */ 112 #define FSR_DO (1<<0) /* Denormalized operand error */ 113 114 /* Version reg. */ 115 /* Basic PVR mask */ 116 #define PVR0_PVR_FULL_MASK 0x80000000 117 #define PVR0_USE_BARREL_MASK 0x40000000 118 #define PVR0_USE_DIV_MASK 0x20000000 119 #define PVR0_USE_HW_MUL_MASK 0x10000000 120 #define PVR0_USE_FPU_MASK 0x08000000 121 #define PVR0_USE_EXC_MASK 0x04000000 122 #define PVR0_USE_ICACHE_MASK 0x02000000 123 #define PVR0_USE_DCACHE_MASK 0x01000000 124 #define PVR0_USE_MMU_MASK 0x00800000 125 #define PVR0_USE_BTC 0x00400000 126 #define PVR0_ENDI_MASK 0x00200000 127 #define PVR0_FAULT 0x00100000 128 #define PVR0_VERSION_MASK 0x0000FF00 129 #define PVR0_USER1_MASK 0x000000FF 130 #define PVR0_SPROT_MASK 0x00000001 131 132 #define PVR0_VERSION_SHIFT 8 133 134 /* User 2 PVR mask */ 135 #define PVR1_USER2_MASK 0xFFFFFFFF 136 137 /* Configuration PVR masks */ 138 #define PVR2_D_OPB_MASK 0x80000000 139 #define PVR2_D_LMB_MASK 0x40000000 140 #define PVR2_I_OPB_MASK 0x20000000 141 #define PVR2_I_LMB_MASK 0x10000000 142 #define PVR2_INTERRUPT_IS_EDGE_MASK 0x08000000 143 #define PVR2_EDGE_IS_POSITIVE_MASK 0x04000000 144 #define PVR2_D_PLB_MASK 0x02000000 /* new */ 145 #define PVR2_I_PLB_MASK 0x01000000 /* new */ 146 #define PVR2_INTERCONNECT 0x00800000 /* new */ 147 #define PVR2_USE_EXTEND_FSL 0x00080000 /* new */ 148 #define PVR2_USE_FSL_EXC 0x00040000 /* new */ 149 #define PVR2_USE_MSR_INSTR 0x00020000 150 #define PVR2_USE_PCMP_INSTR 0x00010000 151 #define PVR2_AREA_OPTIMISED 0x00008000 152 #define PVR2_USE_BARREL_MASK 0x00004000 153 #define PVR2_USE_DIV_MASK 0x00002000 154 #define PVR2_USE_HW_MUL_MASK 0x00001000 155 #define PVR2_USE_FPU_MASK 0x00000800 156 #define PVR2_USE_MUL64_MASK 0x00000400 157 #define PVR2_USE_FPU2_MASK 0x00000200 /* new */ 158 #define PVR2_USE_IPLBEXC 0x00000100 159 #define PVR2_USE_DPLBEXC 0x00000080 160 #define PVR2_OPCODE_0x0_ILL_MASK 0x00000040 161 #define PVR2_UNALIGNED_EXC_MASK 0x00000020 162 #define PVR2_ILL_OPCODE_EXC_MASK 0x00000010 163 #define PVR2_IOPB_BUS_EXC_MASK 0x00000008 164 #define PVR2_DOPB_BUS_EXC_MASK 0x00000004 165 #define PVR2_DIV_ZERO_EXC_MASK 0x00000002 166 #define PVR2_FPU_EXC_MASK 0x00000001 167 168 /* Debug and exception PVR masks */ 169 #define PVR3_DEBUG_ENABLED_MASK 0x80000000 170 #define PVR3_NUMBER_OF_PC_BRK_MASK 0x1E000000 171 #define PVR3_NUMBER_OF_RD_ADDR_BRK_MASK 0x00380000 172 #define PVR3_NUMBER_OF_WR_ADDR_BRK_MASK 0x0000E000 173 #define PVR3_FSL_LINKS_MASK 0x00000380 174 175 /* ICache config PVR masks */ 176 #define PVR4_USE_ICACHE_MASK 0x80000000 177 #define PVR4_ICACHE_ADDR_TAG_BITS_MASK 0x7C000000 178 #define PVR4_ICACHE_USE_FSL_MASK 0x02000000 179 #define PVR4_ICACHE_ALLOW_WR_MASK 0x01000000 180 #define PVR4_ICACHE_LINE_LEN_MASK 0x00E00000 181 #define PVR4_ICACHE_BYTE_SIZE_MASK 0x001F0000 182 183 /* DCache config PVR masks */ 184 #define PVR5_USE_DCACHE_MASK 0x80000000 185 #define PVR5_DCACHE_ADDR_TAG_BITS_MASK 0x7C000000 186 #define PVR5_DCACHE_USE_FSL_MASK 0x02000000 187 #define PVR5_DCACHE_ALLOW_WR_MASK 0x01000000 188 #define PVR5_DCACHE_LINE_LEN_MASK 0x00E00000 189 #define PVR5_DCACHE_BYTE_SIZE_MASK 0x001F0000 190 #define PVR5_DCACHE_WRITEBACK_MASK 0x00004000 191 192 /* ICache base address PVR mask */ 193 #define PVR6_ICACHE_BASEADDR_MASK 0xFFFFFFFF 194 195 /* ICache high address PVR mask */ 196 #define PVR7_ICACHE_HIGHADDR_MASK 0xFFFFFFFF 197 198 /* DCache base address PVR mask */ 199 #define PVR8_DCACHE_BASEADDR_MASK 0xFFFFFFFF 200 201 /* DCache high address PVR mask */ 202 #define PVR9_DCACHE_HIGHADDR_MASK 0xFFFFFFFF 203 204 /* Target family PVR mask */ 205 #define PVR10_TARGET_FAMILY_MASK 0xFF000000 206 207 /* MMU descrtiption */ 208 #define PVR11_USE_MMU 0xC0000000 209 #define PVR11_MMU_ITLB_SIZE 0x38000000 210 #define PVR11_MMU_DTLB_SIZE 0x07000000 211 #define PVR11_MMU_TLB_ACCESS 0x00C00000 212 #define PVR11_MMU_ZONES 0x003E0000 213 /* MSR Reset value PVR mask */ 214 #define PVR11_MSR_RESET_VALUE_MASK 0x000007FF 215 216 #define C_PVR_NONE 0 217 #define C_PVR_BASIC 1 218 #define C_PVR_FULL 2 219 220 /* CPU flags. */ 221 222 /* Condition codes. */ 223 #define CC_GE 5 224 #define CC_GT 4 225 #define CC_LE 3 226 #define CC_LT 2 227 #define CC_NE 1 228 #define CC_EQ 0 229 230 #define NB_MMU_MODES 3 231 232 #define STREAM_EXCEPTION (1 << 0) 233 #define STREAM_ATOMIC (1 << 1) 234 #define STREAM_TEST (1 << 2) 235 #define STREAM_CONTROL (1 << 3) 236 #define STREAM_NONBLOCK (1 << 4) 237 238 struct CPUMBState { 239 uint32_t debug; 240 uint32_t btaken; 241 uint32_t btarget; 242 uint32_t bimm; 243 244 uint32_t imm; 245 uint32_t regs[33]; 246 uint32_t sregs[24]; 247 float_status fp_status; 248 /* Stack protectors. Yes, it's a hw feature. */ 249 uint32_t slr, shr; 250 251 /* lwx/swx reserved address */ 252 #define RES_ADDR_NONE 0xffffffff /* Use 0xffffffff to indicate no reservation */ 253 uint32_t res_addr; 254 uint32_t res_val; 255 256 /* Internal flags. */ 257 #define IMM_FLAG 4 258 #define MSR_EE_FLAG (1 << 8) 259 #define DRTI_FLAG (1 << 16) 260 #define DRTE_FLAG (1 << 17) 261 #define DRTB_FLAG (1 << 18) 262 #define D_FLAG (1 << 19) /* Bit in ESR. */ 263 /* TB dependent CPUMBState. */ 264 #define IFLAGS_TB_MASK (D_FLAG | IMM_FLAG | DRTI_FLAG | DRTE_FLAG | DRTB_FLAG) 265 uint32_t iflags; 266 267 #if !defined(CONFIG_USER_ONLY) 268 /* Unified MMU. */ 269 struct microblaze_mmu mmu; 270 #endif 271 272 /* Fields up to this point are cleared by a CPU reset */ 273 struct {} end_reset_fields; 274 275 CPU_COMMON 276 277 /* These fields are preserved on reset. */ 278 279 struct { 280 uint32_t regs[16]; 281 } pvr; 282 }; 283 284 /** 285 * MicroBlazeCPU: 286 * @env: #CPUMBState 287 * 288 * A MicroBlaze CPU. 289 */ 290 struct MicroBlazeCPU { 291 /*< private >*/ 292 CPUState parent_obj; 293 294 /*< public >*/ 295 296 /* Microblaze Configuration Settings */ 297 struct { 298 bool stackprot; 299 uint32_t base_vectors; 300 uint8_t use_fpu; 301 uint8_t use_hw_mul; 302 bool use_barrel; 303 bool use_div; 304 bool use_msr_instr; 305 bool use_pcmp_instr; 306 bool use_mmu; 307 bool dcache_writeback; 308 bool endi; 309 char *version; 310 uint8_t pvr; 311 } cfg; 312 313 CPUMBState env; 314 }; 315 316 static inline MicroBlazeCPU *mb_env_get_cpu(CPUMBState *env) 317 { 318 return container_of(env, MicroBlazeCPU, env); 319 } 320 321 #define ENV_GET_CPU(e) CPU(mb_env_get_cpu(e)) 322 323 #define ENV_OFFSET offsetof(MicroBlazeCPU, env) 324 325 void mb_cpu_do_interrupt(CPUState *cs); 326 bool mb_cpu_exec_interrupt(CPUState *cs, int int_req); 327 void mb_cpu_dump_state(CPUState *cpu, FILE *f, fprintf_function cpu_fprintf, 328 int flags); 329 hwaddr mb_cpu_get_phys_page_debug(CPUState *cpu, vaddr addr); 330 int mb_cpu_gdb_read_register(CPUState *cpu, uint8_t *buf, int reg); 331 int mb_cpu_gdb_write_register(CPUState *cpu, uint8_t *buf, int reg); 332 333 void mb_tcg_init(void); 334 MicroBlazeCPU *cpu_mb_init(const char *cpu_model); 335 /* you can call this signal handler from your SIGBUS and SIGSEGV 336 signal handlers to inform the virtual CPU of exceptions. non zero 337 is returned if the signal was handled by the virtual CPU. */ 338 int cpu_mb_signal_handler(int host_signum, void *pinfo, 339 void *puc); 340 341 /* FIXME: MB uses variable pages down to 1K but linux only uses 4k. */ 342 #define TARGET_PAGE_BITS 12 343 344 #define TARGET_PHYS_ADDR_SPACE_BITS 32 345 #define TARGET_VIRT_ADDR_SPACE_BITS 32 346 347 #define cpu_init(cpu_model) CPU(cpu_mb_init(cpu_model)) 348 349 #define cpu_signal_handler cpu_mb_signal_handler 350 351 /* MMU modes definitions */ 352 #define MMU_MODE0_SUFFIX _nommu 353 #define MMU_MODE1_SUFFIX _kernel 354 #define MMU_MODE2_SUFFIX _user 355 #define MMU_NOMMU_IDX 0 356 #define MMU_KERNEL_IDX 1 357 #define MMU_USER_IDX 2 358 /* See NB_MMU_MODES further up the file. */ 359 360 static inline int cpu_mmu_index (CPUMBState *env, bool ifetch) 361 { 362 /* Are we in nommu mode?. */ 363 if (!(env->sregs[SR_MSR] & MSR_VM)) 364 return MMU_NOMMU_IDX; 365 366 if (env->sregs[SR_MSR] & MSR_UM) 367 return MMU_USER_IDX; 368 return MMU_KERNEL_IDX; 369 } 370 371 int mb_cpu_handle_mmu_fault(CPUState *cpu, vaddr address, int rw, 372 int mmu_idx); 373 374 #include "exec/cpu-all.h" 375 376 static inline void cpu_get_tb_cpu_state(CPUMBState *env, target_ulong *pc, 377 target_ulong *cs_base, uint32_t *flags) 378 { 379 *pc = env->sregs[SR_PC]; 380 *cs_base = 0; 381 *flags = (env->iflags & IFLAGS_TB_MASK) | 382 (env->sregs[SR_MSR] & (MSR_UM | MSR_VM | MSR_EE)); 383 } 384 385 #if !defined(CONFIG_USER_ONLY) 386 void mb_cpu_unassigned_access(CPUState *cpu, hwaddr addr, 387 bool is_write, bool is_exec, int is_asi, 388 unsigned size); 389 #endif 390 391 #endif 392