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 #define TARGET_LONG_BITS 32
  23
  24 #define CPUState struct CPUMBState
  25
  26 #include "cpu-defs.h"
  27 struct CPUMBState;
  28 #if !defined(CONFIG_USER_ONLY)
  29 #include "mmu.h"
  30 #endif
  31
  32 #define TARGET_HAS_ICE 1
  33
  34 #define ELF_MACHINE     EM_XILINX_MICROBLAZE
  35
  36 #define EXCP_NMI        1
  37 #define EXCP_MMU        2
  38 #define EXCP_IRQ        3
  39 #define EXCP_BREAK      4
  40 #define EXCP_HW_BREAK   5
  41
  42 /* Register aliases. R0 - R15 */
  43 #define R_SP     1
  44 #define SR_PC    0
  45 #define SR_MSR   1
  46 #define SR_EAR   3
  47 #define SR_ESR   5
  48 #define SR_FSR   7
  49 #define SR_BTR   0xb
  50 #define SR_EDR   0xd
  51
  52 /* MSR flags.  */
  53 #define MSR_BE  (1<<0) /* 0x001 */
  54 #define MSR_IE  (1<<1) /* 0x002 */
  55 #define MSR_C   (1<<2) /* 0x004 */
  56 #define MSR_BIP (1<<3) /* 0x008 */
  57 #define MSR_FSL (1<<4) /* 0x010 */
  58 #define MSR_ICE (1<<5) /* 0x020 */
  59 #define MSR_DZ  (1<<6) /* 0x040 */
  60 #define MSR_DCE (1<<7) /* 0x080 */
  61 #define MSR_EE  (1<<8) /* 0x100 */
  62 #define MSR_EIP (1<<9) /* 0x200 */
  63 #define MSR_CC  (1<<31)
  64
  65 /* Machine State Register (MSR) Fields */
  66 #define MSR_UM (1<<11) /* User Mode */
  67 #define MSR_UMS        (1<<12) /* User Mode Save */
  68 #define MSR_VM (1<<13) /* Virtual Mode */
  69 #define MSR_VMS        (1<<14) /* Virtual Mode Save */
  70
  71 #define MSR_KERNEL      MSR_EE|MSR_VM
  72 //#define MSR_USER     MSR_KERNEL|MSR_UM|MSR_IE
  73 #define MSR_KERNEL_VMS  MSR_EE|MSR_VMS
  74 //#define MSR_USER_VMS MSR_KERNEL_VMS|MSR_UMS|MSR_IE
  75
  76 /* Exception State Register (ESR) Fields */
  77 #define          ESR_DIZ       (1<<11) /* Zone Protection */
  78 #define          ESR_S         (1<<10) /* Store instruction */
  79
  80
  81
  82 /* Version reg.  */
  83 /* Basic PVR mask */
  84 #define PVR0_PVR_FULL_MASK              0x80000000
  85 #define PVR0_USE_BARREL_MASK            0x40000000
  86 #define PVR0_USE_DIV_MASK               0x20000000
  87 #define PVR0_USE_HW_MUL_MASK            0x10000000
  88 #define PVR0_USE_FPU_MASK               0x08000000
  89 #define PVR0_USE_EXC_MASK               0x04000000
  90 #define PVR0_USE_ICACHE_MASK            0x02000000
  91 #define PVR0_USE_DCACHE_MASK            0x01000000
  92 #define PVR0_USE_MMU                    0x00800000      /* new */
  93 #define PVR0_VERSION_MASK               0x0000FF00
  94 #define PVR0_USER1_MASK                 0x000000FF
  95
  96 /* User 2 PVR mask */
  97 #define PVR1_USER2_MASK                 0xFFFFFFFF
  98
  99 /* Configuration PVR masks */
 100 #define PVR2_D_OPB_MASK                 0x80000000
 101 #define PVR2_D_LMB_MASK                 0x40000000
 102 #define PVR2_I_OPB_MASK                 0x20000000
 103 #define PVR2_I_LMB_MASK                 0x10000000
 104 #define PVR2_INTERRUPT_IS_EDGE_MASK     0x08000000
 105 #define PVR2_EDGE_IS_POSITIVE_MASK      0x04000000
 106 #define PVR2_D_PLB_MASK                 0x02000000      /* new */
 107 #define PVR2_I_PLB_MASK                 0x01000000      /* new */
 108 #define PVR2_INTERCONNECT               0x00800000      /* new */
 109 #define PVR2_USE_EXTEND_FSL             0x00080000      /* new */
 110 #define PVR2_USE_FSL_EXC                0x00040000      /* new */
 111 #define PVR2_USE_MSR_INSTR              0x00020000
 112 #define PVR2_USE_PCMP_INSTR             0x00010000
 113 #define PVR2_AREA_OPTIMISED             0x00008000
 114 #define PVR2_USE_BARREL_MASK            0x00004000
 115 #define PVR2_USE_DIV_MASK               0x00002000
 116 #define PVR2_USE_HW_MUL_MASK            0x00001000
 117 #define PVR2_USE_FPU_MASK               0x00000800
 118 #define PVR2_USE_MUL64_MASK             0x00000400
 119 #define PVR2_USE_FPU2_MASK              0x00000200      /* new */
 120 #define PVR2_USE_IPLBEXC                0x00000100
 121 #define PVR2_USE_DPLBEXC                0x00000080
 122 #define PVR2_OPCODE_0x0_ILL_MASK        0x00000040
 123 #define PVR2_UNALIGNED_EXC_MASK         0x00000020
 124 #define PVR2_ILL_OPCODE_EXC_MASK        0x00000010
 125 #define PVR2_IOPB_BUS_EXC_MASK          0x00000008
 126 #define PVR2_DOPB_BUS_EXC_MASK          0x00000004
 127 #define PVR2_DIV_ZERO_EXC_MASK          0x00000002
 128 #define PVR2_FPU_EXC_MASK               0x00000001
 129
 130 /* Debug and exception PVR masks */
 131 #define PVR3_DEBUG_ENABLED_MASK         0x80000000
 132 #define PVR3_NUMBER_OF_PC_BRK_MASK      0x1E000000
 133 #define PVR3_NUMBER_OF_RD_ADDR_BRK_MASK 0x00380000
 134 #define PVR3_NUMBER_OF_WR_ADDR_BRK_MASK 0x0000E000
 135 #define PVR3_FSL_LINKS_MASK             0x00000380
 136
 137 /* ICache config PVR masks */
 138 #define PVR4_USE_ICACHE_MASK            0x80000000
 139 #define PVR4_ICACHE_ADDR_TAG_BITS_MASK  0x7C000000
 140 #define PVR4_ICACHE_USE_FSL_MASK        0x02000000
 141 #define PVR4_ICACHE_ALLOW_WR_MASK       0x01000000
 142 #define PVR4_ICACHE_LINE_LEN_MASK       0x00E00000
 143 #define PVR4_ICACHE_BYTE_SIZE_MASK      0x001F0000
 144
 145 /* DCache config PVR masks */
 146 #define PVR5_USE_DCACHE_MASK            0x80000000
 147 #define PVR5_DCACHE_ADDR_TAG_BITS_MASK  0x7C000000
 148 #define PVR5_DCACHE_USE_FSL_MASK        0x02000000
 149 #define PVR5_DCACHE_ALLOW_WR_MASK       0x01000000
 150 #define PVR5_DCACHE_LINE_LEN_MASK       0x00E00000
 151 #define PVR5_DCACHE_BYTE_SIZE_MASK      0x001F0000
 152
 153 /* ICache base address PVR mask */
 154 #define PVR6_ICACHE_BASEADDR_MASK       0xFFFFFFFF
 155
 156 /* ICache high address PVR mask */
 157 #define PVR7_ICACHE_HIGHADDR_MASK       0xFFFFFFFF
 158
 159 /* DCache base address PVR mask */
 160 #define PVR8_DCACHE_BASEADDR_MASK       0xFFFFFFFF
 161
 162 /* DCache high address PVR mask */
 163 #define PVR9_DCACHE_HIGHADDR_MASK       0xFFFFFFFF
 164
 165 /* Target family PVR mask */
 166 #define PVR10_TARGET_FAMILY_MASK        0xFF000000
 167
 168 /* MMU descrtiption */
 169 #define PVR11_USE_MMU                   0xC0000000
 170 #define PVR11_MMU_ITLB_SIZE             0x38000000
 171 #define PVR11_MMU_DTLB_SIZE             0x07000000
 172 #define PVR11_MMU_TLB_ACCESS            0x00C00000
 173 #define PVR11_MMU_ZONES                 0x003C0000
 174 /* MSR Reset value PVR mask */
 175 #define PVR11_MSR_RESET_VALUE_MASK      0x000007FF
 176
 177
 178
 179 /* CPU flags.  */
 180
 181 /* Condition codes.  */
 182 #define CC_GE  5
 183 #define CC_GT  4
 184 #define CC_LE  3
 185 #define CC_LT  2
 186 #define CC_NE  1
 187 #define CC_EQ  0
 188
 189 #define NB_MMU_MODES    3
 190 typedef struct CPUMBState {
 191     uint32_t debug;
 192     uint32_t btaken;
 193     uint32_t btarget;
 194     uint32_t bimm;
 195
 196     uint32_t imm;
 197     uint32_t regs[33];
 198     uint32_t sregs[24];
 199
 200     /* Internal flags.  */
 201 #define IMM_FLAG        4
 202 #define DRTI_FLAG       (1 << 16)
 203 #define DRTE_FLAG       (1 << 17)
 204 #define DRTB_FLAG       (1 << 18)
 205 #define D_FLAG          (1 << 19)  /* Bit in ESR.  */
 206 /* TB dependant CPUState.  */
 207 #define IFLAGS_TB_MASK  (D_FLAG | IMM_FLAG | DRTI_FLAG | DRTE_FLAG | DRTB_FLAG)
 208     uint32_t iflags;
 209
 210     struct {
 211         uint32_t regs[16];
 212     } pvr;
 213
 214 #if !defined(CONFIG_USER_ONLY)
 215     /* Unified MMU.  */
 216     struct microblaze_mmu mmu;
 217 #endif
 218
 219     CPU_COMMON
 220 } CPUMBState;
 221
 222 CPUState *cpu_mb_init(const char *cpu_model);
 223 int cpu_mb_exec(CPUState *s);
 224 void cpu_mb_close(CPUState *s);
 225 void do_interrupt(CPUState *env);
 226 /* you can call this signal handler from your SIGBUS and SIGSEGV
 227    signal handlers to inform the virtual CPU of exceptions. non zero
 228    is returned if the signal was handled by the virtual CPU.  */
 229 int cpu_mb_signal_handler(int host_signum, void *pinfo,
 230                           void *puc);
 231
 232 enum {
 233     CC_OP_DYNAMIC, /* Use env->cc_op  */
 234     CC_OP_FLAGS,
 235     CC_OP_CMP,
 236 };
 237
 238 /* FIXME: MB uses variable pages down to 1K but linux only uses 4k.  */
 239 #define TARGET_PAGE_BITS 12
 240 #define MMAP_SHIFT TARGET_PAGE_BITS
 241
 242 #define cpu_init cpu_mb_init
 243 #define cpu_exec cpu_mb_exec
 244 #define cpu_gen_code cpu_mb_gen_code
 245 #define cpu_signal_handler cpu_mb_signal_handler
 246
 247 #define CPU_SAVE_VERSION 1
 248
 249 /* MMU modes definitions */
 250 #define MMU_MODE0_SUFFIX _nommu
 251 #define MMU_MODE1_SUFFIX _kernel
 252 #define MMU_MODE2_SUFFIX _user
 253 #define MMU_NOMMU_IDX   0
 254 #define MMU_KERNEL_IDX  1
 255 #define MMU_USER_IDX    2
 256 /* See NB_MMU_MODES further up the file.  */
 257
 258 static inline int cpu_mmu_index (CPUState *env)
 259 {
 260         /* Are we in nommu mode?.  */
 261         if (!(env->sregs[SR_MSR] & MSR_VM))
 262             return MMU_NOMMU_IDX;
 263
 264         if (env->sregs[SR_MSR] & MSR_UM)
 265             return MMU_USER_IDX;
 266         return MMU_KERNEL_IDX;
 267 }
 268
 269 int cpu_mb_handle_mmu_fault(CPUState *env, target_ulong address, int rw,
 270                             int mmu_idx, int is_softmmu);
 271
 272 #if defined(CONFIG_USER_ONLY)
 273 static inline void cpu_clone_regs(CPUState *env, target_ulong newsp)
 274 {
 275     if (newsp)
 276         env->regs[R_SP] = newsp;
 277     env->regs[3] = 0;
 278 }
 279 #endif
 280
 281 static inline void cpu_set_tls(CPUState *env, target_ulong newtls)
 282 {
 283 }
 284
 285 static inline int cpu_interrupts_enabled(CPUState *env)
 286 {
 287     return env->sregs[SR_MSR] & MSR_IE;
 288 }
 289
 290 #include "cpu-all.h"
 291 #include "exec-all.h"
 292
 293 static inline void cpu_pc_from_tb(CPUState *env, TranslationBlock *tb)
 294 {
 295     env->sregs[SR_PC] = tb->pc;
 296 }
 297
 298 static inline target_ulong cpu_get_pc(CPUState *env)
 299 {
 300     return env->sregs[SR_PC];
 301 }
 302
 303 static inline void cpu_get_tb_cpu_state(CPUState *env, target_ulong *pc,
 304                                         target_ulong *cs_base, int *flags)
 305 {
 306     *pc = env->sregs[SR_PC];
 307     *cs_base = 0;
 308     *flags = env->iflags & IFLAGS_TB_MASK;
 309 }
 310 #endif