src/target/target.h

   1 /***************************************************************************
   2  *   Copyright (C) 2005 by Dominic Rath                                    *
   3  *   Dominic.Rath@gmx.de                                                   *
   4  *                                                                         *
   5  *   Copyright (C) 2007,2008 Øyvind Harboe                                 *
   6  *   oyvind.harboe@zylin.com                                               *
   7  *                                                                         *
   8  *   Copyright (C) 2008 by Spencer Oliver                                  *
   9  *   spen@spen-soft.co.uk                                                  *
  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 TARGET_H
  27 #define TARGET_H
  28
  29 #include "breakpoints.h"
  30 #include "algorithm.h"
  31 #include "command.h"
  32
  33 struct reg_s;
  34 struct trace_s;
  35 struct command_context_s;
  36
  37 /*
  38  * TARGET_UNKNOWN = 0: we don't know anything about the target yet
  39  * TARGET_RUNNING = 1: the target is executing user code
  40  * TARGET_HALTED  = 2: the target is not executing code, and ready to talk to the
  41  * debugger. on an xscale it means that the debug handler is executing
  42  * TARGET_RESET   = 3: the target is being held in reset (only a temporary state,
  43  * not sure how this is used with all the recent changes)
  44  * TARGET_DEBUG_RUNNING = 4: the target is running, but it is executing code on
  45  * behalf of the debugger (e.g. algorithm for flashing) */
  46
  47 enum target_state
  48 {
  49         TARGET_UNKNOWN = 0,
  50         TARGET_RUNNING = 1,
  51         TARGET_HALTED = 2,
  52         TARGET_RESET = 3,
  53         TARGET_DEBUG_RUNNING = 4,
  54 };
  55
  56 extern const Jim_Nvp nvp_target_state[];
  57
  58 enum nvp_assert {
  59         NVP_DEASSERT,
  60         NVP_ASSERT,
  61 };
  62
  63 extern const Jim_Nvp nvp_assert[];
  64
  65 enum target_reset_mode
  66 {
  67         RESET_UNKNOWN = 0,
  68         RESET_RUN = 1,          /* reset and let target run */
  69         RESET_HALT = 2,         /* reset and halt target out of reset */
  70         RESET_INIT = 3,         /* reset and halt target out of reset, then run init script */
  71 };
  72
  73 extern const Jim_Nvp nvp_reset_mode[];
  74
  75 enum target_debug_reason
  76 {
  77         DBG_REASON_DBGRQ = 0,
  78         DBG_REASON_BREAKPOINT = 1,
  79         DBG_REASON_WATCHPOINT = 2,
  80         DBG_REASON_WPTANDBKPT = 3,
  81         DBG_REASON_SINGLESTEP = 4,
  82         DBG_REASON_NOTHALTED = 5,
  83         DBG_REASON_UNDEFINED = 6
  84 };
  85
  86 extern const Jim_Nvp nvp_target_debug_reason[];
  87
  88 enum target_endianess
  89 {
  90         TARGET_ENDIAN_UNKNOWN=0,
  91         TARGET_BIG_ENDIAN = 1, TARGET_LITTLE_ENDIAN = 2
  92 };
  93
  94 extern const Jim_Nvp nvp_target_endian[];
  95
  96 struct target_s;
  97
  98 typedef struct working_area_s
  99 {
 100         u32 address;
 101         u32 size;
 102         int free;
 103         uint8_t *backup;
 104         struct working_area_s **user;
 105         struct working_area_s *next;
 106 } working_area_t;
 107
 108 // target_type.h contains the full definitionof struct target_type_s
 109 struct target_type_s;
 110 typedef struct target_type_s target_type_t;
 111
 112 /* forward decloration */
 113 typedef struct target_event_action_s target_event_action_t;
 114
 115 typedef struct target_s
 116 {
 117         target_type_t *type;                            /* target type definition (name, access functions) */
 118         const char *cmd_name;                           /* tcl Name of target */
 119         int target_number;                                      /* generaly, target index but may not be in order */
 120         jtag_tap_t *tap;                                        /* where on the jtag chain is this */
 121         const char *variant;                            /* what varient of this chip is it? */
 122         target_event_action_t *event_action;
 123
 124         int reset_halt;                                         /* attempt resetting the CPU into the halted mode? */
 125         u32 working_area;                                       /* working area (initialized RAM). Evaluated
 126                                                                                  * upon first allocation from virtual/physical address. */
 127         u32 working_area_virt;                          /* virtual address */
 128         u32 working_area_phys;                          /* physical address */
 129         u32 working_area_size;                          /* size in bytes */
 130         u32 backup_working_area;                        /* whether the content of the working area has to be preserved */
 131         struct working_area_s *working_areas;/* list of allocated working areas */
 132         enum target_debug_reason debug_reason;/* reason why the target entered debug state */
 133         enum target_endianess endianness;       /* target endianess */
 134         enum target_state state;                        /* the current backend-state (running, halted, ...) */
 135         struct reg_cache_s *reg_cache;          /* the first register cache of the target (core regs) */
 136         struct breakpoint_s *breakpoints;       /* list of breakpoints */
 137         struct watchpoint_s *watchpoints;       /* list of watchpoints */
 138         struct trace_s *trace_info;                     /* generic trace information */
 139         struct debug_msg_receiver_s *dbgmsg;/* list of debug message receivers */
 140         u32 dbg_msg_enabled;                            /* debug message status */
 141         void *arch_info;                                        /* architecture specific information */
 142         struct target_s *next;                          /* next target in list */
 143
 144         int display;                                            /* display async info in telnet session. Do not display
 145                                                                                  * lots of halted/resumed info when stepping in debugger. */
 146 } target_t;
 147
 148 enum target_event
 149 {
 150         /* LD historical names
 151          * - Prior to the great TCL change
 152          * - June/July/Aug 2008
 153          * - Duane Ellis */
 154         TARGET_EVENT_OLD_gdb_program_config,
 155         TARGET_EVENT_OLD_pre_reset,
 156         TARGET_EVENT_OLD_post_reset,
 157         TARGET_EVENT_OLD_pre_resume,
 158
 159         /* allow GDB to do stuff before others handle the halted event,
 160          * this is in lieu of defining ordering of invocation of events,
 161          * which would be more complicated */
 162         TARGET_EVENT_EARLY_HALTED,
 163         TARGET_EVENT_HALTED,            /* target entered debug state from normal execution or reset */
 164         TARGET_EVENT_RESUMED,           /* target resumed to normal execution */
 165         TARGET_EVENT_RESUME_START,
 166         TARGET_EVENT_RESUME_END,
 167
 168         TARGET_EVENT_GDB_START, /* debugger started execution (step/run) */
 169         TARGET_EVENT_GDB_END, /* debugger stopped execution (step/run) */
 170
 171         TARGET_EVENT_RESET_START,
 172         TARGET_EVENT_RESET_ASSERT_PRE,
 173         TARGET_EVENT_RESET_ASSERT_POST,
 174         TARGET_EVENT_RESET_DEASSERT_PRE,
 175         TARGET_EVENT_RESET_DEASSERT_POST,
 176         TARGET_EVENT_RESET_HALT_PRE,
 177         TARGET_EVENT_RESET_HALT_POST,
 178         TARGET_EVENT_RESET_WAIT_PRE,
 179         TARGET_EVENT_RESET_WAIT_POST,
 180         TARGET_EVENT_RESET_INIT,
 181         TARGET_EVENT_RESET_END,
 182
 183         TARGET_EVENT_DEBUG_HALTED,      /* target entered debug state, but was executing on behalf of the debugger */
 184         TARGET_EVENT_DEBUG_RESUMED, /* target resumed to execute on behalf of the debugger */
 185
 186         TARGET_EVENT_EXAMINE_START,
 187         TARGET_EVENT_EXAMINE_END,
 188
 189         TARGET_EVENT_GDB_ATTACH,
 190         TARGET_EVENT_GDB_DETACH,
 191
 192         TARGET_EVENT_GDB_FLASH_ERASE_START,
 193         TARGET_EVENT_GDB_FLASH_ERASE_END,
 194         TARGET_EVENT_GDB_FLASH_WRITE_START,
 195         TARGET_EVENT_GDB_FLASH_WRITE_END,
 196 };
 197
 198 struct target_event_action_s {
 199         enum target_event event;
 200         Jim_Obj *body;
 201         int has_percent;
 202         target_event_action_t *next;
 203  };
 204
 205 typedef struct target_event_callback_s
 206 {
 207         int (*callback)(struct target_s *target, enum target_event event, void *priv);
 208         void *priv;
 209         struct target_event_callback_s *next;
 210 } target_event_callback_t;
 211
 212 typedef struct target_timer_callback_s
 213 {
 214         int (*callback)(void *priv);
 215         int time_ms;
 216         int periodic;
 217         struct timeval when;
 218         void *priv;
 219         struct target_timer_callback_s *next;
 220 } target_timer_callback_t;
 221
 222 extern int target_register_commands(struct command_context_s *cmd_ctx);
 223 extern int target_register_user_commands(struct command_context_s *cmd_ctx);
 224 extern int target_init(struct command_context_s *cmd_ctx);
 225 extern int target_examine(void);
 226 extern int handle_target(void *priv);
 227 extern int target_process_reset(struct command_context_s *cmd_ctx, enum target_reset_mode reset_mode);
 228
 229 extern int target_register_event_callback(int (*callback)(struct target_s *target, enum target_event event, void *priv), void *priv);
 230 extern int target_unregister_event_callback(int (*callback)(struct target_s *target, enum target_event event, void *priv), void *priv);
 231 extern int target_poll(target_t *target);
 232 extern int target_resume(target_t *target, int current, u32 address, int handle_breakpoints, int debug_execution);
 233 extern int target_halt(target_t *target);
 234 extern int target_call_event_callbacks(target_t *target, enum target_event event);
 235
 236 /* The period is very approximate, the callback can happen much more often
 237  * or much more rarely than specified
 238  */
 239 extern int target_register_timer_callback(int (*callback)(void *priv), int time_ms, int periodic, void *priv);
 240 extern int target_unregister_timer_callback(int (*callback)(void *priv), void *priv);
 241 extern int target_call_timer_callbacks(void);
 242 /* invoke this to ensure that e.g. polling timer callbacks happen before
 243  * a syncrhonous command completes.
 244  */
 245 extern int target_call_timer_callbacks_now(void);
 246
 247 extern target_t* get_current_target(struct command_context_s *cmd_ctx);
 248 extern int get_num_by_target(target_t *query_target);
 249 extern target_t *get_target(const char *id);
 250
 251 /**
 252  * Get the target name.
 253  *
 254  * This routine is a wrapper for the target->type->name field.
 255  */
 256 extern const char *target_get_name(struct target_s *target);
 257
 258 /**
 259  * Examine the specified @a target.
 260  *
 261  * This routine is a wrapper for target->type->examine.
 262  */
 263 extern int target_examine_one(struct target_s *target);
 264 /// @returns @c true if the target has been examined.
 265 extern bool target_was_examined(struct target_s *target);
 266 /// Sets the @c examined flag for the given target.
 267 extern void target_set_examined(struct target_s *target);
 268 /// Reset the @c examined flag for the given target.
 269 extern void target_reset_examined(struct target_s *target);
 270
 271
 272 /**
 273  * Add the @a breakpoint for @a target.
 274  *
 275  * This routine is a wrapper for target->type->add_breakpoint.
 276  */
 277 extern int target_add_breakpoint(struct target_s *target,
 278                 struct breakpoint_s *breakpoint);
 279 /**
 280  * Remove the @a breakpoint for @a target.
 281  *
 282  * This routine is a wrapper for target->type->remove_breakpoint.
 283  */
 284 extern int target_remove_breakpoint(struct target_s *target,
 285                 struct breakpoint_s *breakpoint);
 286 /**
 287  * Add the @a watchpoint for @a target.
 288  *
 289  * This routine is a wrapper for target->type->add_watchpoint.
 290  */
 291 extern int target_add_watchpoint(struct target_s *target,
 292                 struct watchpoint_s *watchpoint);
 293 /**
 294  * Remove the @a watchpoint for @a target.
 295  *
 296  * This routine is a wrapper for target->type->remove_watchpoint.
 297  */
 298 extern int target_remove_watchpoint(struct target_s *target,
 299                 struct watchpoint_s *watchpoint);
 300
 301 /**
 302  * Obtain the registers for GDB.
 303  *
 304  * This routine is a wrapper for target->type->get_gdb_reg_list.
 305  */
 306 extern int target_get_gdb_reg_list(struct target_s *target,
 307                 struct reg_s **reg_list[], int *reg_list_size);
 308
 309 /**
 310  * Step the target.
 311  *
 312  * This routine is a wrapper for target->type->step.
 313  */
 314 int target_step(struct target_s *target,
 315                 int current, u32 address, int handle_breakpoints);
 316 /**
 317  * Run an algorithm on the @a target given.
 318  *
 319  * This routine is a wrapper for target->type->run_algorithm.
 320  */
 321 extern int target_run_algorithm(struct target_s *target,
 322                 int num_mem_params, mem_param_t *mem_params,
 323                 int num_reg_params, reg_param_t *reg_param,
 324                 u32 entry_point, u32 exit_point,
 325                 int timeout_ms, void *arch_info);
 326
 327 /**
 328  * Read @a count items of @a size bytes from the memory of @a target at
 329  * the @a address given.
 330  *
 331  * This routine is a wrapper for target->type->read_memory.
 332  */
 333 extern int target_read_memory(struct target_s *target,
 334                 u32 address, u32 size, u32 count, uint8_t *buffer);
 335 /**
 336  * Write @a count items of @a size bytes to the memory of @a target at
 337  * the @a address given.
 338  *
 339  * This routine is wrapper for target->type->write_memory.
 340  */
 341 extern int target_write_memory(struct target_s *target,
 342                 u32 address, u32 size, u32 count, uint8_t *buffer);
 343
 344 /**
 345  * Write @a count items of 4 bytes to the memory of @a target at
 346  * the @a address given.  Because it operates only on whole words,
 347  * this should be faster than target_write_memory().
 348  *
 349  * This routine is wrapper for target->type->bulk_write_memory.
 350  */
 351 extern int target_bulk_write_memory(struct target_s *target,
 352                 u32 address, u32 count, uint8_t *buffer);
 353
 354 extern int target_write_buffer(struct target_s *target, u32 address, u32 size, uint8_t *buffer);
 355 extern int target_read_buffer(struct target_s *target, u32 address, u32 size, uint8_t *buffer);
 356 extern int target_checksum_memory(struct target_s *target, u32 address, u32 size, u32* crc);
 357 extern int target_blank_check_memory(struct target_s *target, u32 address, u32 size, u32* blank);
 358 extern int target_wait_state(target_t *target, enum target_state state, int ms);
 359
 360 /* DANGER!!!!!
 361  *
 362  * if "area" passed in to target_alloc_working_area() points to a memory
 363  * location that goes out of scope (e.g. a pointer on the stack), then
 364  * the caller of target_alloc_working_area() is responsible for invoking
 365  * target_free_working_area() before "area" goes out of scope.
 366  *
 367  * target_free_all_working_areas() will NULL out the "area" pointer
 368  * upon resuming or resetting the CPU.
 369  *
 370  */
 371 extern int target_alloc_working_area(struct target_s *target, u32 size, working_area_t **area);
 372 extern int target_free_working_area(struct target_s *target, working_area_t *area);
 373 extern int target_free_working_area_restore(struct target_s *target, working_area_t *area, int restore);
 374 extern void target_free_all_working_areas(struct target_s *target);
 375 extern void target_free_all_working_areas_restore(struct target_s *target, int restore);
 376
 377 extern target_t *all_targets;
 378
 379 extern target_event_callback_t *target_event_callbacks;
 380 extern target_timer_callback_t *target_timer_callbacks;
 381
 382 extern u32 target_buffer_get_u32(target_t *target, const uint8_t *buffer);
 383 extern uint16_t target_buffer_get_u16(target_t *target, const uint8_t *buffer);
 384 extern uint8_t  target_buffer_get_u8 (target_t *target, const uint8_t *buffer);
 385 extern void target_buffer_set_u32(target_t *target, uint8_t *buffer, u32 value);
 386 extern void target_buffer_set_u16(target_t *target, uint8_t *buffer, uint16_t value);
 387 extern void target_buffer_set_u8 (target_t *target, uint8_t *buffer, uint8_t  value);
 388
 389 int target_read_u32(struct target_s *target, u32 address, u32 *value);
 390 int target_read_u16(struct target_s *target, u32 address, uint16_t *value);
 391 int target_read_u8(struct target_s *target, u32 address, uint8_t *value);
 392 int target_write_u32(struct target_s *target, u32 address, u32 value);
 393 int target_write_u16(struct target_s *target, u32 address, uint16_t value);
 394 int target_write_u8(struct target_s *target, u32 address, uint8_t value);
 395
 396 /* Issues USER() statements with target state information */
 397 int target_arch_state(struct target_s *target);
 398
 399 void target_handle_event( target_t *t, enum target_event e);
 400 void target_all_handle_event( enum target_event e );
 401
 402 #define ERROR_TARGET_INVALID    (-300)
 403 #define ERROR_TARGET_INIT_FAILED (-301)
 404 #define ERROR_TARGET_TIMEOUT    (-302)
 405 #define ERROR_TARGET_NOT_HALTED (-304)
 406 #define ERROR_TARGET_FAILURE    (-305)
 407 #define ERROR_TARGET_UNALIGNED_ACCESS   (-306)
 408 #define ERROR_TARGET_DATA_ABORT (-307)
 409 #define ERROR_TARGET_RESOURCE_NOT_AVAILABLE     (-308)
 410 #define ERROR_TARGET_TRANSLATION_FAULT  (-309)
 411 #define ERROR_TARGET_NOT_RUNNING (-310)
 412 #define ERROR_TARGET_NOT_EXAMINED (-311)
 413
 414 extern const Jim_Nvp nvp_error_target[];
 415 extern const char *target_strerror_safe( int err );
 416
 417 #endif /* TARGET_H */