src/target/armv4_5.h

   1 /***************************************************************************
   2  *   Copyright (C) 2005 by Dominic Rath                                    *
   3  *   Dominic.Rath@gmx.de                                                   *
   4  *                                                                         *
   5  *   Copyright (C) 2008 by Spencer Oliver                                  *
   6  *   spen@spen-soft.co.uk                                                  *
   7  *                                                                         *
   8  *   Copyright (C) 2009 by Øyvind Harboe                                   *
   9  *   oyvind.harboe@zylin.com                                               *
  10  *                                                                         *
  11  *   This program is free software; you can redistribute it and/or modify  *
  12  *   it under the terms of the GNU General Public License as published by  *
  13  *   the Free Software Foundation; either version 2 of the License, or     *
  14  *   (at your option) any later version.                                   *
  15  *                                                                         *
  16  *   This program is distributed in the hope that it will be useful,       *
  17  *   but WITHOUT ANY WARRANTY; without even the implied warranty of        *
  18  *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the         *
  19  *   GNU General Public License for more details.                          *
  20  *                                                                         *
  21  *   You should have received a copy of the GNU General Public License     *
  22  *   along with this program; if not, write to the                         *
  23  *   Free Software Foundation, Inc.,                                       *
  24  *   59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.             *
  25  ***************************************************************************/
  26 #ifndef ARMV4_5_H
  27 #define ARMV4_5_H
  28
  29 #include "register.h"
  30 #include "target.h"
  31 #include "log.h"
  32 #include "etm.h"
  33
  34 typedef enum armv4_5_mode
  35 {
  36         ARMV4_5_MODE_USR = 16,
  37         ARMV4_5_MODE_FIQ = 17,
  38         ARMV4_5_MODE_IRQ = 18,
  39         ARMV4_5_MODE_SVC = 19,
  40         ARMV4_5_MODE_ABT = 23,
  41         ARMV4_5_MODE_UND = 27,
  42         ARMV4_5_MODE_SYS = 31,
  43         ARMV4_5_MODE_ANY = -1
  44 } armv4_5_mode_t;
  45
  46 extern char** armv4_5_mode_strings;
  47
  48 typedef enum armv4_5_state
  49 {
  50         ARMV4_5_STATE_ARM,
  51         ARMV4_5_STATE_THUMB,
  52         ARMV4_5_STATE_JAZELLE,
  53 } armv4_5_state_t;
  54
  55 extern char* armv4_5_state_strings[];
  56
  57 extern int armv4_5_core_reg_map[7][17];
  58
  59 #define ARMV4_5_CORE_REG_MODE(cache, mode, num) \
  60                 cache->reg_list[armv4_5_core_reg_map[armv4_5_mode_to_number(mode)][num]]
  61 #define ARMV4_5_CORE_REG_MODENUM(cache, mode, num) \
  62                 cache->reg_list[armv4_5_core_reg_map[mode][num]]
  63
  64 /* offsets into armv4_5 core register cache */
  65 enum
  66 {
  67         ARMV4_5_CPSR = 31,
  68         ARMV4_5_SPSR_FIQ = 32,
  69         ARMV4_5_SPSR_IRQ = 33,
  70         ARMV4_5_SPSR_SVC = 34,
  71         ARMV4_5_SPSR_ABT = 35,
  72         ARMV4_5_SPSR_UND = 36
  73 };
  74
  75 #define ARMV4_5_COMMON_MAGIC 0x0A450A45
  76
  77 /* NOTE:  this is being morphed into a generic toplevel holder for ARMs. */
  78 #define armv4_5_common_s arm
  79
  80 /**
  81  * Represents a generic ARM core, with standard application registers.
  82  *
  83  * There are sixteen application registers (including PC, SP, LR) and a PSR.
  84  * Cortex-M series cores do not support as many core states or shadowed
  85  * registers as traditional ARM cores, and only support Thumb2 instructions.
  86  */
  87 struct arm
  88 {
  89         int common_magic;
  90         struct reg_cache *core_cache;
  91
  92         int /* armv4_5_mode */ core_mode;
  93         enum armv4_5_state core_state;
  94
  95         /** Flag reporting unavailability of the BKPT instruction. */
  96         bool is_armv4;
  97
  98         /** Handle for the Embedded Trace Module, if one is present. */
  99         struct etm_context *etm;
 100
 101         int (*full_context)(struct target *target);
 102         int (*read_core_reg)(struct target *target,
 103                         int num, enum armv4_5_mode mode);
 104         int (*write_core_reg)(struct target *target,
 105                         int num, enum armv4_5_mode mode, uint32_t value);
 106         void *arch_info;
 107 };
 108
 109 #define target_to_armv4_5 target_to_arm
 110
 111 /** Convert target handle to generic ARM target state handle. */
 112 static inline struct arm *target_to_arm(struct target *target)
 113 {
 114         return target->arch_info;
 115 }
 116
 117 static inline bool is_arm(struct arm *arm)
 118 {
 119         return arm && arm->common_magic == ARMV4_5_COMMON_MAGIC;
 120 }
 121
 122 struct armv4_5_algorithm
 123 {
 124         int common_magic;
 125
 126         enum armv4_5_mode core_mode;
 127         enum armv4_5_state core_state;
 128 };
 129
 130 struct armv4_5_core_reg
 131 {
 132         int num;
 133         enum armv4_5_mode mode;
 134         struct target *target;
 135         struct arm *armv4_5_common;
 136 };
 137
 138 struct reg_cache* armv4_5_build_reg_cache(struct target *target,
 139                 struct arm *armv4_5_common);
 140
 141 /* map psr mode bits to linear number */
 142 static __inline int armv4_5_mode_to_number(enum armv4_5_mode mode)
 143 {
 144         switch (mode)
 145         {
 146                 case ARMV4_5_MODE_USR: return 0; break;
 147                 case ARMV4_5_MODE_FIQ: return 1; break;
 148                 case ARMV4_5_MODE_IRQ: return 2; break;
 149                 case ARMV4_5_MODE_SVC: return 3; break;
 150                 case ARMV4_5_MODE_ABT: return 4; break;
 151                 case ARMV4_5_MODE_UND: return 5; break;
 152                 case ARMV4_5_MODE_SYS: return 6; break;
 153                 case ARMV4_5_MODE_ANY: return 0; break; /* map MODE_ANY to user mode */
 154                 default:
 155                         LOG_ERROR("invalid mode value encountered %d", mode);
 156                         return -1;
 157         }
 158 }
 159
 160 /* map linear number to mode bits */
 161 static __inline enum armv4_5_mode armv4_5_number_to_mode(int number)
 162 {
 163         switch (number)
 164         {
 165                 case 0: return ARMV4_5_MODE_USR; break;
 166                 case 1: return ARMV4_5_MODE_FIQ; break;
 167                 case 2: return ARMV4_5_MODE_IRQ; break;
 168                 case 3: return ARMV4_5_MODE_SVC; break;
 169                 case 4: return ARMV4_5_MODE_ABT; break;
 170                 case 5: return ARMV4_5_MODE_UND; break;
 171                 case 6: return ARMV4_5_MODE_SYS; break;
 172                 default:
 173                         LOG_ERROR("mode index out of bounds %d", number);
 174                         return ARMV4_5_MODE_ANY;
 175         }
 176 };
 177
 178 int armv4_5_arch_state(struct target *target);
 179 int armv4_5_get_gdb_reg_list(struct target *target,
 180                 struct reg **reg_list[], int *reg_list_size);
 181
 182 int armv4_5_register_commands(struct command_context *cmd_ctx);
 183 int armv4_5_init_arch_info(struct target *target, struct arm *armv4_5);
 184
 185 int armv4_5_run_algorithm(struct target *target,
 186                 int num_mem_params, struct mem_param *mem_params,
 187                 int num_reg_params, struct reg_param *reg_params,
 188                 uint32_t entry_point, uint32_t exit_point,
 189                 int timeout_ms, void *arch_info);
 190
 191 int armv4_5_invalidate_core_regs(struct target *target);
 192
 193 /* ARM mode instructions
 194  */
 195
 196 /* Store multiple increment after
 197  * Rn: base register
 198  * List: for each bit in list: store register
 199  * S: in priviledged mode: store user-mode registers
 200  * W = 1: update the base register. W = 0: leave the base register untouched
 201  */
 202 #define ARMV4_5_STMIA(Rn, List, S, W)   (0xe8800000 | ((S) << 22) | ((W) << 21) | ((Rn) << 16) | (List))
 203
 204 /* Load multiple increment after
 205  * Rn: base register
 206  * List: for each bit in list: store register
 207  * S: in priviledged mode: store user-mode registers
 208  * W = 1: update the base register. W = 0: leave the base register untouched
 209  */
 210 #define ARMV4_5_LDMIA(Rn, List, S, W)   (0xe8900000 | ((S) << 22) | ((W) << 21) | ((Rn) << 16) | (List))
 211
 212 /* MOV r8, r8 */
 213 #define ARMV4_5_NOP                                     (0xe1a08008)
 214
 215 /* Move PSR to general purpose register
 216  * R = 1: SPSR R = 0: CPSR
 217  * Rn: target register
 218  */
 219 #define ARMV4_5_MRS(Rn, R)                      (0xe10f0000 | ((R) << 22) | ((Rn) << 12))
 220
 221 /* Store register
 222  * Rd: register to store
 223  * Rn: base register
 224  */
 225 #define ARMV4_5_STR(Rd, Rn)                     (0xe5800000 | ((Rd) << 12) | ((Rn) << 16))
 226
 227 /* Load register
 228  * Rd: register to load
 229  * Rn: base register
 230  */
 231 #define ARMV4_5_LDR(Rd, Rn)                     (0xe5900000 | ((Rd) << 12) | ((Rn) << 16))
 232
 233 /* Move general purpose register to PSR
 234  * R = 1: SPSR R = 0: CPSR
 235  * Field: Field mask
 236  * 1: control field 2: extension field 4: status field 8: flags field
 237  * Rm: source register
 238  */
 239 #define ARMV4_5_MSR_GP(Rm, Field, R)    (0xe120f000 | (Rm) | ((Field) << 16) | ((R) << 22))
 240 #define ARMV4_5_MSR_IM(Im, Rotate, Field, R)    (0xe320f000 | (Im)  | ((Rotate) << 8) | ((Field) << 16) | ((R) << 22))
 241
 242 /* Load Register Halfword Immediate Post-Index
 243  * Rd: register to load
 244  * Rn: base register
 245  */
 246 #define ARMV4_5_LDRH_IP(Rd, Rn) (0xe0d000b2 | ((Rd) << 12) | ((Rn) << 16))
 247
 248 /* Load Register Byte Immediate Post-Index
 249  * Rd: register to load
 250  * Rn: base register
 251  */
 252 #define ARMV4_5_LDRB_IP(Rd, Rn) (0xe4d00001 | ((Rd) << 12) | ((Rn) << 16))
 253
 254 /* Store register Halfword Immediate Post-Index
 255  * Rd: register to store
 256  * Rn: base register
 257  */
 258 #define ARMV4_5_STRH_IP(Rd, Rn) (0xe0c000b2 | ((Rd) << 12) | ((Rn) << 16))
 259
 260 /* Store register Byte Immediate Post-Index
 261  * Rd: register to store
 262  * Rn: base register
 263  */
 264 #define ARMV4_5_STRB_IP(Rd, Rn) (0xe4c00001 | ((Rd) << 12) | ((Rn) << 16))
 265
 266 /* Branch (and Link)
 267  * Im: Branch target (left-shifted by 2 bits, added to PC)
 268  * L: 1: branch and link 0: branch only
 269  */
 270 #define ARMV4_5_B(Im, L) (0xea000000 | (Im) | ((L) << 24))
 271
 272 /* Branch and exchange (ARM state)
 273  * Rm: register holding branch target address
 274  */
 275 #define ARMV4_5_BX(Rm) (0xe12fff10 | (Rm))
 276
 277 /* Move to ARM register from coprocessor
 278  * CP: Coprocessor number
 279  * op1: Coprocessor opcode
 280  * Rd: destination register
 281  * CRn: first coprocessor operand
 282  * CRm: second coprocessor operand
 283  * op2: Second coprocessor opcode
 284  */
 285 #define ARMV4_5_MRC(CP, op1, Rd, CRn, CRm, op2) (0xee100010 | (CRm) | ((op2) << 5) | ((CP) << 8) | ((Rd) << 12) | ((CRn) << 16) | ((op1) << 21))
 286
 287 /* Move to coprocessor from ARM register
 288  * CP: Coprocessor number
 289  * op1: Coprocessor opcode
 290  * Rd: destination register
 291  * CRn: first coprocessor operand
 292  * CRm: second coprocessor operand
 293  * op2: Second coprocessor opcode
 294  */
 295 #define ARMV4_5_MCR(CP, op1, Rd, CRn, CRm, op2) (0xee000010 | (CRm) | ((op2) << 5) | ((CP) << 8) | ((Rd) << 12) | ((CRn) << 16) | ((op1) << 21))
 296
 297 /* Breakpoint instruction (ARMv5)
 298  * Im: 16-bit immediate
 299  */
 300 #define ARMV5_BKPT(Im) (0xe1200070 | ((Im & 0xfff0) << 8) | (Im & 0xf))
 301
 302
 303 /* Thumb mode instructions
 304  */
 305
 306 /* Store register (Thumb mode)
 307  * Rd: source register
 308  * Rn: base register
 309  */
 310 #define ARMV4_5_T_STR(Rd, Rn)   ((0x6000 | (Rd) | ((Rn) << 3)) | ((0x6000 | (Rd) | ((Rn) << 3)) << 16))
 311
 312 /* Load register (Thumb state)
 313  * Rd: destination register
 314  * Rn: base register
 315  */
 316 #define ARMV4_5_T_LDR(Rd, Rn)   ((0x6800 | ((Rn) << 3) | (Rd)) | ((0x6800 | ((Rn) << 3) | (Rd)) << 16))
 317
 318 /* Load multiple (Thumb state)
 319  * Rn: base register
 320  * List: for each bit in list: store register
 321  */
 322 #define ARMV4_5_T_LDMIA(Rn, List) ((0xc800 | ((Rn) << 8) | (List)) | ((0xc800 | ((Rn) << 8) | List) << 16))
 323
 324 /* Load register with PC relative addressing
 325  * Rd: register to load
 326  */
 327 #define ARMV4_5_T_LDR_PCREL(Rd) ((0x4800 | ((Rd) << 8)) | ((0x4800 | ((Rd) << 8)) << 16))
 328
 329 /* Move hi register (Thumb mode)
 330  * Rd: destination register
 331  * Rm: source register
 332  */
 333 #define ARMV4_5_T_MOV(Rd, Rm)   ((0x4600 | ((Rd) & 0x7) | (((Rd) & 0x8) << 4) | (((Rm) & 0x7) << 3) | (((Rm) & 0x8) << 3)) | ((0x4600 | ((Rd) & 0x7) | (((Rd) & 0x8) << 4) | (((Rm) & 0x7) << 3) | (((Rm) & 0x8) << 3)) << 16))
 334
 335 /* No operation (Thumb mode)
 336  */
 337 #define ARMV4_5_T_NOP   (0x46c0 | (0x46c0 << 16))
 338
 339 /* Move immediate to register (Thumb state)
 340  * Rd: destination register
 341  * Im: 8-bit immediate value
 342  */
 343 #define ARMV4_5_T_MOV_IM(Rd, Im)        ((0x2000 | ((Rd) << 8) | (Im)) | ((0x2000 | ((Rd) << 8) | (Im)) << 16))
 344
 345 /* Branch and Exchange
 346  * Rm: register containing branch target
 347  */
 348 #define ARMV4_5_T_BX(Rm)                ((0x4700 | ((Rm) << 3)) | ((0x4700 | ((Rm) << 3)) << 16))
 349
 350 /* Branch (Thumb state)
 351  * Imm: Branch target
 352  */
 353 #define ARMV4_5_T_B(Imm)        ((0xe000 | (Imm)) | ((0xe000 | (Imm)) << 16))
 354
 355 /* Breakpoint instruction (ARMv5) (Thumb state)
 356  * Im: 8-bit immediate
 357  */
 358 #define ARMV5_T_BKPT(Im) ((0xbe00 | Im) | ((0xbe00 | Im) << 16))
 359
 360 /* build basic mrc/mcr opcode */
 361
 362 static inline uint32_t mrc_opcode(int cpnum, uint32_t op1, uint32_t op2, uint32_t CRn, uint32_t CRm)
 363 {
 364         uint32_t t = 0;
 365         t|=op1<<21;
 366         t|=op2<<5;
 367         t|=CRn<<16;
 368         t|=CRm<<0;
 369         return t;
 370 }
 371
 372
 373
 374
 375 #endif /* ARMV4_5_H */