src/target/target.h

   1 /***************************************************************************
   2  *   Copyright (C) 2005 by Dominic Rath                                    *
   3  *   Dominic.Rath@gmx.de                                                   *
   4  *                                                                         *
   5  *   Copyright (C) 2007-2010 Øyvind Harboe                                 *
   6  *   oyvind.harboe@zylin.com                                               *
   7  *                                                                         *
   8  *   Copyright (C) 2008 by Spencer Oliver                                  *
   9  *   spen@spen-soft.co.uk                                                  *
  10  *                                                                         *
  11  *   Copyright (C) 2011 by Broadcom Corporation                            *
  12  *   Evan Hunter - ehunter@broadcom.com                                    *
  13  *                                                                         *
  14  *   Copyright (C) ST-Ericsson SA 2011                                     *
  15  *   michel.jaouen@stericsson.com : smp minimum support                    *
  16  *                                                                         *
  17  *   This program is free software; you can redistribute it and/or modify  *
  18  *   it under the terms of the GNU General Public License as published by  *
  19  *   the Free Software Foundation; either version 2 of the License, or     *
  20  *   (at your option) any later version.                                   *
  21  *                                                                         *
  22  *   This program is distributed in the hope that it will be useful,       *
  23  *   but WITHOUT ANY WARRANTY; without even the implied warranty of        *
  24  *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the         *
  25  *   GNU General Public License for more details.                          *
  26  *                                                                         *
  27  *   You should have received a copy of the GNU General Public License     *
  28  *   along with this program.  If not, see <http://www.gnu.org/licenses/>. *
  29  ***************************************************************************/
  30
  31 #ifndef TARGET_H
  32 #define TARGET_H
  33
  34 #include <helper/list.h>
  35
  36 struct reg;
  37 struct trace;
  38 struct command_context;
  39 struct breakpoint;
  40 struct watchpoint;
  41 struct mem_param;
  42 struct reg_param;
  43 struct target_list;
  44 struct gdb_fileio_info;
  45
  46 /*
  47  * TARGET_UNKNOWN = 0: we don't know anything about the target yet
  48  * TARGET_RUNNING = 1: the target is executing user code
  49  * TARGET_HALTED  = 2: the target is not executing code, and ready to talk to the
  50  * debugger. on an xscale it means that the debug handler is executing
  51  * TARGET_RESET   = 3: the target is being held in reset (only a temporary state,
  52  * not sure how this is used with all the recent changes)
  53  * TARGET_DEBUG_RUNNING = 4: the target is running, but it is executing code on
  54  * behalf of the debugger (e.g. algorithm for flashing)
  55  *
  56  * also see: target_state_name();
  57  */
  58
  59 enum target_state {
  60         TARGET_UNKNOWN = 0,
  61         TARGET_RUNNING = 1,
  62         TARGET_HALTED = 2,
  63         TARGET_RESET = 3,
  64         TARGET_DEBUG_RUNNING = 4,
  65 };
  66
  67 enum nvp_assert {
  68         NVP_DEASSERT,
  69         NVP_ASSERT,
  70 };
  71
  72 enum target_reset_mode {
  73         RESET_UNKNOWN = 0,
  74         RESET_RUN = 1,          /* reset and let target run */
  75         RESET_HALT = 2,         /* reset and halt target out of reset */
  76         RESET_INIT = 3,         /* reset and halt target out of reset, then run init script */
  77 };
  78
  79 enum target_debug_reason {
  80         DBG_REASON_DBGRQ = 0,
  81         DBG_REASON_BREAKPOINT = 1,
  82         DBG_REASON_WATCHPOINT = 2,
  83         DBG_REASON_WPTANDBKPT = 3,
  84         DBG_REASON_SINGLESTEP = 4,
  85         DBG_REASON_NOTHALTED = 5,
  86         DBG_REASON_EXIT = 6,
  87         DBG_REASON_UNDEFINED = 7,
  88 };
  89
  90 enum target_endianness {
  91         TARGET_ENDIAN_UNKNOWN = 0,
  92         TARGET_BIG_ENDIAN = 1, TARGET_LITTLE_ENDIAN = 2
  93 };
  94
  95 struct working_area {
  96         uint32_t address;
  97         uint32_t size;
  98         bool free;
  99         uint8_t *backup;
 100         struct working_area **user;
 101         struct working_area *next;
 102 };
 103
 104 struct gdb_service {
 105         struct target *target;
 106         /*  field for smp display  */
 107         /*  element 0 coreid currently displayed ( 1 till n) */
 108         /*  element 1 coreid to be displayed at next resume 1 till n 0 means resume
 109          *  all cores core displayed  */
 110         int32_t core[2];
 111 };
 112
 113 /* target back off timer */
 114 struct backoff_timer {
 115         int times;
 116         int count;
 117 };
 118
 119 /* split target registers into multiple class */
 120 enum target_register_class {
 121         REG_CLASS_ALL,
 122         REG_CLASS_GENERAL,
 123 };
 124
 125 /* target_type.h contains the full definition of struct target_type */
 126 struct target {
 127         struct target_type *type;                       /* target type definition (name, access functions) */
 128         const char *cmd_name;                           /* tcl Name of target */
 129         int target_number;                                      /* DO NOT USE!  field to be removed in 2010 */
 130         struct jtag_tap *tap;                           /* where on the jtag chain is this */
 131         int32_t coreid;                                         /* which device on the TAP? */
 132
 133         /**
 134          * Indicates whether this target has been examined.
 135          *
 136          * Do @b not access this field directly, use target_was_examined()
 137          * or target_set_examined().
 138          */
 139         bool examined;
 140
 141         /**
 142          * true if the  target is currently running a downloaded
 143          * "algorithm" instead of arbitrary user code. OpenOCD code
 144          * invoking algorithms is trusted to maintain correctness of
 145          * any cached state (e.g. for flash status), which arbitrary
 146          * code will have no reason to know about.
 147          */
 148         bool running_alg;
 149
 150         struct target_event_action *event_action;
 151
 152         int reset_halt;                                         /* attempt resetting the CPU into the halted mode? */
 153         uint32_t working_area;                          /* working area (initialised RAM). Evaluated
 154                                                                                  * upon first allocation from virtual/physical address. */
 155         bool working_area_virt_spec;            /* virtual address specified? */
 156         uint32_t working_area_virt;                     /* virtual address */
 157         bool working_area_phys_spec;            /* virtual address specified? */
 158         uint32_t working_area_phys;                     /* physical address */
 159         uint32_t working_area_size;                     /* size in bytes */
 160         uint32_t backup_working_area;           /* whether the content of the working area has to be preserved */
 161         struct working_area *working_areas;/* list of allocated working areas */
 162         enum target_debug_reason debug_reason;/* reason why the target entered debug state */
 163         enum target_endianness endianness;      /* target endianness */
 164         /* also see: target_state_name() */
 165         enum target_state state;                        /* the current backend-state (running, halted, ...) */
 166         struct reg_cache *reg_cache;            /* the first register cache of the target (core regs) */
 167         struct breakpoint *breakpoints;         /* list of breakpoints */
 168         struct watchpoint *watchpoints;         /* list of watchpoints */
 169         struct trace *trace_info;                       /* generic trace information */
 170         struct debug_msg_receiver *dbgmsg;      /* list of debug message receivers */
 171         uint32_t dbg_msg_enabled;                       /* debug message status */
 172         void *arch_info;                                        /* architecture specific information */
 173         struct target *next;                            /* next target in list */
 174
 175         int display;                                            /* display async info in telnet session. Do not display
 176                                                                                  * lots of halted/resumed info when stepping in debugger. */
 177         bool halt_issued;                                       /* did we transition to halted state? */
 178         long long halt_issued_time;                     /* Note time when halt was issued */
 179
 180         bool dbgbase_set;                                       /* By default the debug base is not set */
 181         uint32_t dbgbase;                                       /* Really a Cortex-A specific option, but there is no
 182                                                                                  * system in place to support target specific options
 183                                                                                  * currently. */
 184         struct rtos *rtos;                                      /* Instance of Real Time Operating System support */
 185         bool rtos_auto_detect;                          /* A flag that indicates that the RTOS has been specified as "auto"
 186                                                                                  * and must be detected when symbols are offered */
 187         struct backoff_timer backoff;
 188         int smp;                                                        /* add some target attributes for smp support */
 189         struct target_list *head;
 190         /* the gdb service is there in case of smp, we have only one gdb server
 191          * for all smp target
 192          * the target attached to the gdb is changing dynamically by changing
 193          * gdb_service->target pointer */
 194         struct gdb_service *gdb_service;
 195
 196         /* file-I/O information for host to do syscall */
 197         struct gdb_fileio_info *fileio_info;
 198 };
 199
 200 struct target_list {
 201         struct target *target;
 202         struct target_list *next;
 203 };
 204
 205 struct gdb_fileio_info {
 206         char *identifier;
 207         uint32_t param_1;
 208         uint32_t param_2;
 209         uint32_t param_3;
 210         uint32_t param_4;
 211 };
 212
 213 /** Returns the instance-specific name of the specified target. */
 214 static inline const char *target_name(struct target *target)
 215 {
 216         return target->cmd_name;
 217 }
 218
 219 const char *debug_reason_name(struct target *t);
 220
 221 enum target_event {
 222
 223         /* allow GDB to do stuff before others handle the halted event,
 224          * this is in lieu of defining ordering of invocation of events,
 225          * which would be more complicated
 226          *
 227          * Telling GDB to halt does not mean that the target stopped running,
 228          * simply that we're dropping out of GDB's waiting for step or continue.
 229          *
 230          * This can be useful when e.g. detecting power dropout.
 231          */
 232         TARGET_EVENT_GDB_HALT,
 233         TARGET_EVENT_HALTED,            /* target entered debug state from normal execution or reset */
 234         TARGET_EVENT_RESUMED,           /* target resumed to normal execution */
 235         TARGET_EVENT_RESUME_START,
 236         TARGET_EVENT_RESUME_END,
 237
 238         TARGET_EVENT_GDB_START, /* debugger started execution (step/run) */
 239         TARGET_EVENT_GDB_END, /* debugger stopped execution (step/run) */
 240
 241         TARGET_EVENT_RESET_START,
 242         TARGET_EVENT_RESET_ASSERT_PRE,
 243         TARGET_EVENT_RESET_ASSERT,      /* C code uses this instead of SRST */
 244         TARGET_EVENT_RESET_ASSERT_POST,
 245         TARGET_EVENT_RESET_DEASSERT_PRE,
 246         TARGET_EVENT_RESET_DEASSERT_POST,
 247         TARGET_EVENT_RESET_HALT_PRE,
 248         TARGET_EVENT_RESET_HALT_POST,
 249         TARGET_EVENT_RESET_WAIT_PRE,
 250         TARGET_EVENT_RESET_WAIT_POST,
 251         TARGET_EVENT_RESET_INIT,
 252         TARGET_EVENT_RESET_END,
 253
 254         TARGET_EVENT_DEBUG_HALTED,      /* target entered debug state, but was executing on behalf of the debugger */
 255         TARGET_EVENT_DEBUG_RESUMED, /* target resumed to execute on behalf of the debugger */
 256
 257         TARGET_EVENT_EXAMINE_START,
 258         TARGET_EVENT_EXAMINE_END,
 259
 260         TARGET_EVENT_GDB_ATTACH,
 261         TARGET_EVENT_GDB_DETACH,
 262
 263         TARGET_EVENT_GDB_FLASH_ERASE_START,
 264         TARGET_EVENT_GDB_FLASH_ERASE_END,
 265         TARGET_EVENT_GDB_FLASH_WRITE_START,
 266         TARGET_EVENT_GDB_FLASH_WRITE_END,
 267
 268         TARGET_EVENT_TRACE_CONFIG,
 269 };
 270
 271 struct target_event_action {
 272         enum target_event event;
 273         struct Jim_Interp *interp;
 274         struct Jim_Obj *body;
 275         int has_percent;
 276         struct target_event_action *next;
 277 };
 278
 279 bool target_has_event_action(struct target *target, enum target_event event);
 280
 281 struct target_event_callback {
 282         int (*callback)(struct target *target, enum target_event event, void *priv);
 283         void *priv;
 284         struct target_event_callback *next;
 285 };
 286
 287 struct target_reset_callback {
 288         struct list_head list;
 289         void *priv;
 290         int (*callback)(struct target *target, enum target_reset_mode reset_mode, void *priv);
 291 };
 292
 293 struct target_trace_callback {
 294         struct list_head list;
 295         void *priv;
 296         int (*callback)(struct target *target, size_t len, uint8_t *data, void *priv);
 297 };
 298
 299 struct target_timer_callback {
 300         int (*callback)(void *priv);
 301         int time_ms;
 302         int periodic;
 303         bool removed;
 304         struct timeval when;
 305         void *priv;
 306         struct target_timer_callback *next;
 307 };
 308
 309 int target_register_commands(struct command_context *cmd_ctx);
 310 int target_examine(void);
 311
 312 int target_register_event_callback(
 313                 int (*callback)(struct target *target,
 314                 enum target_event event, void *priv),
 315                 void *priv);
 316 int target_unregister_event_callback(
 317                 int (*callback)(struct target *target,
 318                 enum target_event event, void *priv),
 319                 void *priv);
 320
 321 int target_register_reset_callback(
 322                 int (*callback)(struct target *target,
 323                 enum target_reset_mode reset_mode, void *priv),
 324                 void *priv);
 325 int target_unregister_reset_callback(
 326                 int (*callback)(struct target *target,
 327                 enum target_reset_mode reset_mode, void *priv),
 328                 void *priv);
 329
 330 int target_register_trace_callback(
 331                 int (*callback)(struct target *target,
 332                 size_t len, uint8_t *data, void *priv),
 333                 void *priv);
 334 int target_unregister_trace_callback(
 335                 int (*callback)(struct target *target,
 336                 size_t len, uint8_t *data, void *priv),
 337                 void *priv);
 338
 339 /* Poll the status of the target, detect any error conditions and report them.
 340  *
 341  * Also note that this fn will clear such error conditions, so a subsequent
 342  * invocation will then succeed.
 343  *
 344  * These error conditions can be "sticky" error conditions. E.g. writing
 345  * to memory could be implemented as an open loop and if memory writes
 346  * fails, then a note is made of it, the error is sticky, but the memory
 347  * write loop still runs to completion. This improves performance in the
 348  * normal case as there is no need to verify that every single write succeed,
 349  * yet it is possible to detect error conditions.
 350  */
 351 int target_poll(struct target *target);
 352 int target_resume(struct target *target, int current, uint32_t address,
 353                 int handle_breakpoints, int debug_execution);
 354 int target_halt(struct target *target);
 355 int target_call_event_callbacks(struct target *target, enum target_event event);
 356 int target_call_reset_callbacks(struct target *target, enum target_reset_mode reset_mode);
 357 int target_call_trace_callbacks(struct target *target, size_t len, uint8_t *data);
 358
 359 /**
 360  * The period is very approximate, the callback can happen much more often
 361  * or much more rarely than specified
 362  */
 363 int target_register_timer_callback(int (*callback)(void *priv),
 364                 int time_ms, int periodic, void *priv);
 365 int target_unregister_timer_callback(int (*callback)(void *priv), void *priv);
 366 int target_call_timer_callbacks(void);
 367 /**
 368  * Invoke this to ensure that e.g. polling timer callbacks happen before
 369  * a synchronous command completes.
 370  */
 371 int target_call_timer_callbacks_now(void);
 372
 373 struct target *get_target_by_num(int num);
 374 struct target *get_current_target(struct command_context *cmd_ctx);
 375 struct target *get_target(const char *id);
 376
 377 /**
 378  * Get the target type name.
 379  *
 380  * This routine is a wrapper for the target->type->name field.
 381  * Note that this is not an instance-specific name for his target.
 382  */
 383 const char *target_type_name(struct target *target);
 384
 385 /**
 386  * Examine the specified @a target, letting it perform any
 387  * Initialisation that requires JTAG access.
 388  *
 389  * This routine is a wrapper for target->type->examine.
 390  */
 391 int target_examine_one(struct target *target);
 392
 393 /** @returns @c true if target_set_examined() has been called. */
 394 static inline bool target_was_examined(struct target *target)
 395 {
 396         return target->examined;
 397 }
 398
 399 /** Sets the @c examined flag for the given target. */
 400 /** Use in target->type->examine() after one-time setup is done. */
 401 static inline void target_set_examined(struct target *target)
 402 {
 403         target->examined = true;
 404 }
 405
 406 /**
 407  * Add the @a breakpoint for @a target.
 408  *
 409  * This routine is a wrapper for target->type->add_breakpoint.
 410  */
 411 int target_add_breakpoint(struct target *target,
 412                 struct breakpoint *breakpoint);
 413 /**
 414  * Add the @a ContextID breakpoint  for @a target.
 415  *
 416  * This routine is a wrapper for target->type->add_context_breakpoint.
 417  */
 418 int target_add_context_breakpoint(struct target *target,
 419                 struct breakpoint *breakpoint);
 420 /**
 421  * Add the @a ContextID & IVA breakpoint  for @a target.
 422  *
 423  * This routine is a wrapper for target->type->add_hybrid_breakpoint.
 424  */
 425 int target_add_hybrid_breakpoint(struct target *target,
 426                 struct breakpoint *breakpoint);
 427 /**
 428  * Remove the @a breakpoint for @a target.
 429  *
 430  * This routine is a wrapper for target->type->remove_breakpoint.
 431  */
 432
 433 int target_remove_breakpoint(struct target *target,
 434                 struct breakpoint *breakpoint);
 435 /**
 436  * Add the @a watchpoint for @a target.
 437  *
 438  * This routine is a wrapper for target->type->add_watchpoint.
 439  */
 440 int target_add_watchpoint(struct target *target,
 441                 struct watchpoint *watchpoint);
 442 /**
 443  * Remove the @a watchpoint for @a target.
 444  *
 445  * This routine is a wrapper for target->type->remove_watchpoint.
 446  */
 447 int target_remove_watchpoint(struct target *target,
 448                 struct watchpoint *watchpoint);
 449
 450 /**
 451  * Find out the just hit @a watchpoint for @a target.
 452  *
 453  * This routine is a wrapper for target->type->hit_watchpoint.
 454  */
 455 int target_hit_watchpoint(struct target *target,
 456                 struct watchpoint **watchpoint);
 457
 458 /**
 459  * Obtain the registers for GDB.
 460  *
 461  * This routine is a wrapper for target->type->get_gdb_reg_list.
 462  */
 463 int target_get_gdb_reg_list(struct target *target,
 464                 struct reg **reg_list[], int *reg_list_size,
 465                 enum target_register_class reg_class);
 466
 467 /**
 468  * Step the target.
 469  *
 470  * This routine is a wrapper for target->type->step.
 471  */
 472 int target_step(struct target *target,
 473                 int current, uint32_t address, int handle_breakpoints);
 474 /**
 475  * Run an algorithm on the @a target given.
 476  *
 477  * This routine is a wrapper for target->type->run_algorithm.
 478  */
 479 int target_run_algorithm(struct target *target,
 480                 int num_mem_params, struct mem_param *mem_params,
 481                 int num_reg_params, struct reg_param *reg_param,
 482                 uint32_t entry_point, uint32_t exit_point,
 483                 int timeout_ms, void *arch_info);
 484
 485 /**
 486  * Starts an algorithm in the background on the @a target given.
 487  *
 488  * This routine is a wrapper for target->type->start_algorithm.
 489  */
 490 int target_start_algorithm(struct target *target,
 491                 int num_mem_params, struct mem_param *mem_params,
 492                 int num_reg_params, struct reg_param *reg_params,
 493                 uint32_t entry_point, uint32_t exit_point,
 494                 void *arch_info);
 495
 496 /**
 497  * Wait for an algorithm on the @a target given.
 498  *
 499  * This routine is a wrapper for target->type->wait_algorithm.
 500  */
 501 int target_wait_algorithm(struct target *target,
 502                 int num_mem_params, struct mem_param *mem_params,
 503                 int num_reg_params, struct reg_param *reg_params,
 504                 uint32_t exit_point, int timeout_ms,
 505                 void *arch_info);
 506
 507 /**
 508  * This routine is a wrapper for asynchronous algorithms.
 509  *
 510  */
 511 int target_run_flash_async_algorithm(struct target *target,
 512                 const uint8_t *buffer, uint32_t count, int block_size,
 513                 int num_mem_params, struct mem_param *mem_params,
 514                 int num_reg_params, struct reg_param *reg_params,
 515                 uint32_t buffer_start, uint32_t buffer_size,
 516                 uint32_t entry_point, uint32_t exit_point,
 517                 void *arch_info);
 518
 519 /**
 520  * Read @a count items of @a size bytes from the memory of @a target at
 521  * the @a address given.
 522  *
 523  * This routine is a wrapper for target->type->read_memory.
 524  */
 525 int target_read_memory(struct target *target,
 526                 uint32_t address, uint32_t size, uint32_t count, uint8_t *buffer);
 527 int target_read_phys_memory(struct target *target,
 528                 uint32_t address, uint32_t size, uint32_t count, uint8_t *buffer);
 529 /**
 530  * Write @a count items of @a size bytes to the memory of @a target at
 531  * the @a address given. @a address must be aligned to @a size
 532  * in target memory.
 533  *
 534  * The endianness is the same in the host and target memory for this
 535  * function.
 536  *
 537  * \todo TODO:
 538  * Really @a buffer should have been defined as "const void *" and
 539  * @a buffer should have been aligned to @a size in the host memory.
 540  *
 541  * This is not enforced via e.g. assert's today and e.g. the
 542  * target_write_buffer fn breaks this assumption.
 543  *
 544  * This routine is wrapper for target->type->write_memory.
 545  */
 546 int target_write_memory(struct target *target,
 547                 uint32_t address, uint32_t size, uint32_t count, const uint8_t *buffer);
 548 int target_write_phys_memory(struct target *target,
 549                 uint32_t address, uint32_t size, uint32_t count, const uint8_t *buffer);
 550
 551 /*
 552  * Write to target memory using the virtual address.
 553  *
 554  * Note that this fn is used to implement software breakpoints. Targets
 555  * can implement support for software breakpoints to memory marked as read
 556  * only by making this fn write to ram even if it is read only(MMU or
 557  * MPUs).
 558  *
 559  * It is sufficient to implement for writing a single word(16 or 32 in
 560  * ARM32/16 bit case) to write the breakpoint to ram.
 561  *
 562  * The target should also take care of "other things" to make sure that
 563  * software breakpoints can be written using this function. E.g.
 564  * when there is a separate instruction and data cache, this fn must
 565  * make sure that the instruction cache is synced up to the potential
 566  * code change that can happen as a result of the memory write(typically
 567  * by invalidating the cache).
 568  *
 569  * The high level wrapper fn in target.c will break down this memory write
 570  * request to multiple write requests to the target driver to e.g. guarantee
 571  * that writing 4 bytes to an aligned address happens with a single 32 bit
 572  * write operation, thus making this fn suitable to e.g. write to special
 573  * peripheral registers which do not support byte operations.
 574  */
 575 int target_write_buffer(struct target *target,
 576                 uint32_t address, uint32_t size, const uint8_t *buffer);
 577 int target_read_buffer(struct target *target,
 578                 uint32_t address, uint32_t size, uint8_t *buffer);
 579 int target_checksum_memory(struct target *target,
 580                 uint32_t address, uint32_t size, uint32_t *crc);
 581 int target_blank_check_memory(struct target *target,
 582                 uint32_t address, uint32_t size, uint32_t *blank);
 583 int target_wait_state(struct target *target, enum target_state state, int ms);
 584
 585 /**
 586  * Obtain file-I/O information from target for GDB to do syscall.
 587  *
 588  * This routine is a wrapper for target->type->get_gdb_fileio_info.
 589  */
 590 int target_get_gdb_fileio_info(struct target *target, struct gdb_fileio_info *fileio_info);
 591
 592 /**
 593  * Pass GDB file-I/O response to target after finishing host syscall.
 594  *
 595  * This routine is a wrapper for target->type->gdb_fileio_end.
 596  */
 597 int target_gdb_fileio_end(struct target *target, int retcode, int fileio_errno, bool ctrl_c);
 598
 599
 600
 601 /** Return the *name* of this targets current state */
 602 const char *target_state_name(struct target *target);
 603
 604 /** Return the *name* of a target event enumeration value */
 605 const char *target_event_name(enum target_event event);
 606
 607 /** Return the *name* of a target reset reason enumeration value */
 608 const char *target_reset_mode_name(enum target_reset_mode reset_mode);
 609
 610 /* DANGER!!!!!
 611  *
 612  * if "area" passed in to target_alloc_working_area() points to a memory
 613  * location that goes out of scope (e.g. a pointer on the stack), then
 614  * the caller of target_alloc_working_area() is responsible for invoking
 615  * target_free_working_area() before "area" goes out of scope.
 616  *
 617  * target_free_all_working_areas() will NULL out the "area" pointer
 618  * upon resuming or resetting the CPU.
 619  *
 620  */
 621 int target_alloc_working_area(struct target *target,
 622                 uint32_t size, struct working_area **area);
 623 /* Same as target_alloc_working_area, except that no error is logged
 624  * when ERROR_TARGET_RESOURCE_NOT_AVAILABLE is returned.
 625  *
 626  * This allows the calling code to *try* to allocate target memory
 627  * and have a fallback to another behaviour(slower?).
 628  */
 629 int target_alloc_working_area_try(struct target *target,
 630                 uint32_t size, struct working_area **area);
 631 int target_free_working_area(struct target *target, struct working_area *area);
 632 void target_free_all_working_areas(struct target *target);
 633 uint32_t target_get_working_area_avail(struct target *target);
 634
 635 /**
 636  * Free all the resources allocated by targets and the target layer
 637  */
 638 void target_quit(void);
 639
 640 extern struct target *all_targets;
 641
 642 uint64_t target_buffer_get_u64(struct target *target, const uint8_t *buffer);
 643 uint32_t target_buffer_get_u32(struct target *target, const uint8_t *buffer);
 644 uint32_t target_buffer_get_u24(struct target *target, const uint8_t *buffer);
 645 uint16_t target_buffer_get_u16(struct target *target, const uint8_t *buffer);
 646 void target_buffer_set_u64(struct target *target, uint8_t *buffer, uint64_t value);
 647 void target_buffer_set_u32(struct target *target, uint8_t *buffer, uint32_t value);
 648 void target_buffer_set_u24(struct target *target, uint8_t *buffer, uint32_t value);
 649 void target_buffer_set_u16(struct target *target, uint8_t *buffer, uint16_t value);
 650
 651 void target_buffer_get_u64_array(struct target *target, const uint8_t *buffer, uint32_t count, uint64_t *dstbuf);
 652 void target_buffer_get_u32_array(struct target *target, const uint8_t *buffer, uint32_t count, uint32_t *dstbuf);
 653 void target_buffer_get_u16_array(struct target *target, const uint8_t *buffer, uint32_t count, uint16_t *dstbuf);
 654 void target_buffer_set_u64_array(struct target *target, uint8_t *buffer, uint32_t count, const uint64_t *srcbuf);
 655 void target_buffer_set_u32_array(struct target *target, uint8_t *buffer, uint32_t count, const uint32_t *srcbuf);
 656 void target_buffer_set_u16_array(struct target *target, uint8_t *buffer, uint32_t count, const uint16_t *srcbuf);
 657
 658 int target_read_u64(struct target *target, uint64_t address, uint64_t *value);
 659 int target_read_u32(struct target *target, uint32_t address, uint32_t *value);
 660 int target_read_u16(struct target *target, uint32_t address, uint16_t *value);
 661 int target_read_u8(struct target *target, uint32_t address, uint8_t *value);
 662 int target_write_u64(struct target *target, uint64_t address, uint64_t value);
 663 int target_write_u32(struct target *target, uint32_t address, uint32_t value);
 664 int target_write_u16(struct target *target, uint32_t address, uint16_t value);
 665 int target_write_u8(struct target *target, uint32_t address, uint8_t value);
 666
 667 /* Issues USER() statements with target state information */
 668 int target_arch_state(struct target *target);
 669
 670 void target_handle_event(struct target *t, enum target_event e);
 671
 672 #define ERROR_TARGET_INVALID    (-300)
 673 #define ERROR_TARGET_INIT_FAILED (-301)
 674 #define ERROR_TARGET_TIMEOUT    (-302)
 675 #define ERROR_TARGET_NOT_HALTED (-304)
 676 #define ERROR_TARGET_FAILURE    (-305)
 677 #define ERROR_TARGET_UNALIGNED_ACCESS   (-306)
 678 #define ERROR_TARGET_DATA_ABORT (-307)
 679 #define ERROR_TARGET_RESOURCE_NOT_AVAILABLE     (-308)
 680 #define ERROR_TARGET_TRANSLATION_FAULT  (-309)
 681 #define ERROR_TARGET_NOT_RUNNING (-310)
 682 #define ERROR_TARGET_NOT_EXAMINED (-311)
 683
 684 extern bool get_target_reset_nag(void);
 685
 686 #endif /* TARGET_H */