target-microblaze/cpu.h

   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 #ifndef CPU_MICROBLAZE_H
  20 #define CPU_MICROBLAZE_H
  21
  22 #include "config.h"
  23 #include "qemu-common.h"
  24
  25 #define TARGET_LONG_BITS 32
  26
  27 #define CPUArchState struct CPUMBState
  28
  29 #include "cpu-defs.h"
  30 #include "softfloat.h"
  31 struct CPUMBState;
  32 typedef struct CPUMBState CPUMBState;
  33 #if !defined(CONFIG_USER_ONLY)
  34 #include "mmu.h"
  35 #endif
  36
  37 #define TARGET_HAS_ICE 1
  38
  39 #define ELF_MACHINE     EM_MICROBLAZE
  40
  41 #define EXCP_NMI        1
  42 #define EXCP_MMU        2
  43 #define EXCP_IRQ        3
  44 #define EXCP_BREAK      4
  45 #define EXCP_HW_BREAK   5
  46 #define EXCP_HW_EXCP    6
  47
  48 /* MicroBlaze-specific interrupt pending bits.  */
  49 #define CPU_INTERRUPT_NMI       CPU_INTERRUPT_TGT_EXT_3
  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                    0x00800000      /* new */
 125 #define PVR0_USE_BTC                    0x00400000
 126 #define PVR0_ENDI                       0x00200000
 127 #define PVR0_FAULT                      0x00100000
 128 #define PVR0_VERSION_MASK               0x0000FF00
 129 #define PVR0_USER1_MASK                 0x000000FF
 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
 204 /* MMU descrtiption */
 205 #define PVR11_USE_MMU                   0xC0000000
 206 #define PVR11_MMU_ITLB_SIZE             0x38000000
 207 #define PVR11_MMU_DTLB_SIZE             0x07000000
 208 #define PVR11_MMU_TLB_ACCESS            0x00C00000
 209 #define PVR11_MMU_ZONES                 0x003E0000
 210 /* MSR Reset value PVR mask */
 211 #define PVR11_MSR_RESET_VALUE_MASK      0x000007FF
 212
 213
 214
 215 /* CPU flags.  */
 216
 217 /* Condition codes.  */
 218 #define CC_GE  5
 219 #define CC_GT  4
 220 #define CC_LE  3
 221 #define CC_LT  2
 222 #define CC_NE  1
 223 #define CC_EQ  0
 224
 225 #define NB_MMU_MODES    3
 226
 227 #define STREAM_EXCEPTION (1 << 0)
 228 #define STREAM_ATOMIC    (1 << 1)
 229 #define STREAM_TEST      (1 << 2)
 230 #define STREAM_CONTROL   (1 << 3)
 231 #define STREAM_NONBLOCK  (1 << 4)
 232
 233 struct CPUMBState {
 234     uint32_t debug;
 235     uint32_t btaken;
 236     uint32_t btarget;
 237     uint32_t bimm;
 238
 239     uint32_t imm;
 240     uint32_t regs[33];
 241     uint32_t sregs[24];
 242     float_status fp_status;
 243     /* Stack protectors. Yes, it's a hw feature.  */
 244     uint32_t slr, shr;
 245
 246     /* lwx/swx reserved address */
 247 #define RES_ADDR_NONE 0xffffffff /* Use 0xffffffff to indicate no reservation */
 248     uint32_t res_addr;
 249
 250     /* Internal flags.  */
 251 #define IMM_FLAG        4
 252 #define MSR_EE_FLAG     (1 << 8)
 253 #define DRTI_FLAG       (1 << 16)
 254 #define DRTE_FLAG       (1 << 17)
 255 #define DRTB_FLAG       (1 << 18)
 256 #define D_FLAG          (1 << 19)  /* Bit in ESR.  */
 257 /* TB dependent CPUMBState.  */
 258 #define IFLAGS_TB_MASK  (D_FLAG | IMM_FLAG | DRTI_FLAG | DRTE_FLAG | DRTB_FLAG)
 259     uint32_t iflags;
 260
 261     struct {
 262         uint32_t regs[16];
 263     } pvr;
 264
 265 #if !defined(CONFIG_USER_ONLY)
 266     /* Unified MMU.  */
 267     struct microblaze_mmu mmu;
 268 #endif
 269
 270     CPU_COMMON
 271 };
 272
 273 #include "cpu-qom.h"
 274
 275 MicroBlazeCPU *cpu_mb_init(const char *cpu_model);
 276 int cpu_mb_exec(CPUMBState *s);
 277 void cpu_mb_close(CPUMBState *s);
 278 void do_interrupt(CPUMBState *env);
 279 /* you can call this signal handler from your SIGBUS and SIGSEGV
 280    signal handlers to inform the virtual CPU of exceptions. non zero
 281    is returned if the signal was handled by the virtual CPU.  */
 282 int cpu_mb_signal_handler(int host_signum, void *pinfo,
 283                           void *puc);
 284
 285 enum {
 286     CC_OP_DYNAMIC, /* Use env->cc_op  */
 287     CC_OP_FLAGS,
 288     CC_OP_CMP,
 289 };
 290
 291 /* FIXME: MB uses variable pages down to 1K but linux only uses 4k.  */
 292 #define TARGET_PAGE_BITS 12
 293 #define MMAP_SHIFT TARGET_PAGE_BITS
 294
 295 #define TARGET_PHYS_ADDR_SPACE_BITS 32
 296 #define TARGET_VIRT_ADDR_SPACE_BITS 32
 297
 298 static inline CPUMBState *cpu_init(const char *cpu_model)
 299 {
 300     MicroBlazeCPU *cpu = cpu_mb_init(cpu_model);
 301     if (cpu == NULL) {
 302         return NULL;
 303     }
 304     return &cpu->env;
 305 }
 306
 307 #define cpu_exec cpu_mb_exec
 308 #define cpu_gen_code cpu_mb_gen_code
 309 #define cpu_signal_handler cpu_mb_signal_handler
 310
 311 #define CPU_SAVE_VERSION 1
 312
 313 /* MMU modes definitions */
 314 #define MMU_MODE0_SUFFIX _nommu
 315 #define MMU_MODE1_SUFFIX _kernel
 316 #define MMU_MODE2_SUFFIX _user
 317 #define MMU_NOMMU_IDX   0
 318 #define MMU_KERNEL_IDX  1
 319 #define MMU_USER_IDX    2
 320 /* See NB_MMU_MODES further up the file.  */
 321
 322 static inline int cpu_mmu_index (CPUMBState *env)
 323 {
 324         /* Are we in nommu mode?.  */
 325         if (!(env->sregs[SR_MSR] & MSR_VM))
 326             return MMU_NOMMU_IDX;
 327
 328         if (env->sregs[SR_MSR] & MSR_UM)
 329             return MMU_USER_IDX;
 330         return MMU_KERNEL_IDX;
 331 }
 332
 333 int cpu_mb_handle_mmu_fault(CPUMBState *env, target_ulong address, int rw,
 334                             int mmu_idx);
 335 #define cpu_handle_mmu_fault cpu_mb_handle_mmu_fault
 336
 337 #if defined(CONFIG_USER_ONLY)
 338 static inline void cpu_clone_regs(CPUMBState *env, target_ulong newsp)
 339 {
 340     if (newsp)
 341         env->regs[R_SP] = newsp;
 342     env->regs[3] = 0;
 343 }
 344 #endif
 345
 346 static inline void cpu_set_tls(CPUMBState *env, target_ulong newtls)
 347 {
 348     env->regs[21] = newtls;
 349 }
 350
 351 static inline int cpu_interrupts_enabled(CPUMBState *env)
 352 {
 353     return env->sregs[SR_MSR] & MSR_IE;
 354 }
 355
 356 #include "cpu-all.h"
 357
 358 static inline target_ulong cpu_get_pc(CPUMBState *env)
 359 {
 360     return env->sregs[SR_PC];
 361 }
 362
 363 static inline void cpu_get_tb_cpu_state(CPUMBState *env, target_ulong *pc,
 364                                         target_ulong *cs_base, int *flags)
 365 {
 366     *pc = env->sregs[SR_PC];
 367     *cs_base = 0;
 368     *flags = (env->iflags & IFLAGS_TB_MASK) |
 369                  (env->sregs[SR_MSR] & (MSR_UM | MSR_VM | MSR_EE));
 370 }
 371
 372 #if !defined(CONFIG_USER_ONLY)
 373 void cpu_unassigned_access(CPUMBState *env1, hwaddr addr,
 374                            int is_write, int is_exec, int is_asi, int size);
 375 #endif
 376
 377 static inline bool cpu_has_work(CPUState *cpu)
 378 {
 379     CPUMBState *env = &MICROBLAZE_CPU(cpu)->env;
 380
 381     return env->interrupt_request & (CPU_INTERRUPT_HARD | CPU_INTERRUPT_NMI);
 382 }
 383
 384 #include "exec-all.h"
 385
 386 static inline void cpu_pc_from_tb(CPUMBState *env, TranslationBlock *tb)
 387 {
 388     env->sregs[SR_PC] = tb->pc;
 389 }
 390
 391 #endif