1 /***************************************************************************
2 * Copyright (C) 2005 by Dominic Rath *
3 * Dominic.Rath@gmx.de *
5 * Copyright (C) 2007-2010 Øyvind Harboe *
6 * oyvind.harboe@zylin.com *
8 * Copyright (C) 2008 by Spencer Oliver *
9 * spen@spen-soft.co.uk *
11 * Copyright (C) 2011 by Broadcom Corporation *
12 * Evan Hunter - ehunter@broadcom.com *
14 * Copyright (C) ST-Ericsson SA 2011 *
15 * michel.jaouen@stericsson.com : smp minimum support *
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. *
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. *
27 * You should have received a copy of the GNU General Public License *
28 * along with this program; if not, write to the *
29 * Free Software Foundation, Inc., *
30 * 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. *
31 ***************************************************************************/
35 #include <helper/types.h>
39 struct command_context;
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)
56 * also see: target_state_name();
66 TARGET_DEBUG_RUNNING = 4,
74 enum target_reset_mode
77 RESET_RUN = 1, /* reset and let target run */
78 RESET_HALT = 2, /* reset and halt target out of reset */
79 RESET_INIT = 3, /* reset and halt target out of reset, then run init script */
82 enum target_debug_reason
85 DBG_REASON_BREAKPOINT = 1,
86 DBG_REASON_WATCHPOINT = 2,
87 DBG_REASON_WPTANDBKPT = 3,
88 DBG_REASON_SINGLESTEP = 4,
89 DBG_REASON_NOTHALTED = 5,
90 DBG_REASON_UNDEFINED = 6
93 enum target_endianness
95 TARGET_ENDIAN_UNKNOWN = 0,
96 TARGET_BIG_ENDIAN = 1, TARGET_LITTLE_ENDIAN = 2
105 struct working_area **user;
106 struct working_area *next;
111 struct target *target;
112 /* field for smp display */
113 /* element 0 coreid currently displayed ( 1 till n) */
114 /* element 1 coreid to be displayed at next resume 1 till n 0 means resume
120 // target_type.h contains the full definitionof struct targe_type
123 struct target_type *type; /* target type definition (name, access functions) */
124 const char *cmd_name; /* tcl Name of target */
125 int target_number; /* DO NOT USE! field to be removed in 2010 */
126 struct jtag_tap *tap; /* where on the jtag chain is this */
127 int32_t coreid; /* which device on the TAP? */
128 const char *variant; /* what variant of this chip is it? */
131 * Indicates whether this target has been examined.
133 * Do @b not access this field directly, use target_was_examined()
134 * or target_set_examined().
138 /** true iff the target is currently running a downloaded
139 * "algorithm" instetad of arbitrary user code. OpenOCD code
140 * invoking algorithms is trusted to maintain correctness of
141 * any cached state (e.g. for flash status), which arbitrary
142 * code will have no reason to know about.
146 struct target_event_action *event_action;
148 int reset_halt; /* attempt resetting the CPU into the halted mode? */
149 uint32_t working_area; /* working area (initialized RAM). Evaluated
150 * upon first allocation from virtual/physical address. */
151 bool working_area_virt_spec; /* virtual address specified? */
152 uint32_t working_area_virt; /* virtual address */
153 bool working_area_phys_spec; /* virtual address specified? */
154 uint32_t working_area_phys; /* physical address */
155 uint32_t working_area_size; /* size in bytes */
156 uint32_t backup_working_area; /* whether the content of the working area has to be preserved */
157 struct working_area *working_areas;/* list of allocated working areas */
158 enum target_debug_reason debug_reason;/* reason why the target entered debug state */
159 enum target_endianness endianness; /* target endianness */
160 // also see: target_state_name()
161 enum target_state state; /* the current backend-state (running, halted, ...) */
162 struct reg_cache *reg_cache; /* the first register cache of the target (core regs) */
163 struct breakpoint *breakpoints; /* list of breakpoints */
164 struct watchpoint *watchpoints; /* list of watchpoints */
165 struct trace *trace_info; /* generic trace information */
166 struct debug_msg_receiver *dbgmsg;/* list of debug message receivers */
167 uint32_t dbg_msg_enabled; /* debug message status */
168 void *arch_info; /* architecture specific information */
169 struct target *next; /* next target in list */
171 int display; /* display async info in telnet session. Do not display
172 * lots of halted/resumed info when stepping in debugger. */
173 bool halt_issued; /* did we transition to halted state? */
174 long long halt_issued_time; /* Note time when halt was issued */
176 bool dbgbase_set; /* By default the debug base is not set */
177 uint32_t dbgbase; /* Really a Cortex-A specific option, but there is no
178 system in place to support target specific options
180 struct rtos *rtos; /* Instance of Real Time Operating System support */
181 bool rtos_auto_detect; /* A flag that indicates that the RTOS has been specified as "auto"
182 * and must be detected when symbols are offered */
184 int smp; /* add some target attributes for smp support */
185 struct target_list *head;
186 /* the gdb service is there in case of smp , we have only one gdb server
188 * the target attached to the gdb is changing dynamically by changing
189 * gdb_service->target pointer */
190 struct gdb_service *gdb_service;
195 struct target *target;
196 struct target_list *next;
199 /** Returns the instance-specific name of the specified target. */
200 static inline const char *target_name(struct target *target)
202 return target->cmd_name;
205 const char *debug_reason_name(struct target *t);
209 /* LD historical names
210 * - Prior to the great TCL change
211 * - June/July/Aug 2008
213 TARGET_EVENT_OLD_gdb_program_config,
214 TARGET_EVENT_OLD_pre_resume,
216 /* allow GDB to do stuff before others handle the halted event,
217 * this is in lieu of defining ordering of invocation of events,
218 * which would be more complicated
220 * Telling GDB to halt does not mean that the target stopped running,
221 * simply that we're dropping out of GDB's waiting for step or continue.
223 * This can be useful when e.g. detecting power dropout.
225 TARGET_EVENT_GDB_HALT,
226 TARGET_EVENT_HALTED, /* target entered debug state from normal execution or reset */
227 TARGET_EVENT_RESUMED, /* target resumed to normal execution */
228 TARGET_EVENT_RESUME_START,
229 TARGET_EVENT_RESUME_END,
231 TARGET_EVENT_GDB_START, /* debugger started execution (step/run) */
232 TARGET_EVENT_GDB_END, /* debugger stopped execution (step/run) */
234 TARGET_EVENT_RESET_START,
235 TARGET_EVENT_RESET_ASSERT_PRE,
236 TARGET_EVENT_RESET_ASSERT, /* C code uses this instead of SRST */
237 TARGET_EVENT_RESET_ASSERT_POST,
238 TARGET_EVENT_RESET_DEASSERT_PRE,
239 TARGET_EVENT_RESET_DEASSERT_POST,
240 TARGET_EVENT_RESET_HALT_PRE,
241 TARGET_EVENT_RESET_HALT_POST,
242 TARGET_EVENT_RESET_WAIT_PRE,
243 TARGET_EVENT_RESET_WAIT_POST,
244 TARGET_EVENT_RESET_INIT,
245 TARGET_EVENT_RESET_END,
247 TARGET_EVENT_DEBUG_HALTED, /* target entered debug state, but was executing on behalf of the debugger */
248 TARGET_EVENT_DEBUG_RESUMED, /* target resumed to execute on behalf of the debugger */
250 TARGET_EVENT_EXAMINE_START,
251 TARGET_EVENT_EXAMINE_END,
253 TARGET_EVENT_GDB_ATTACH,
254 TARGET_EVENT_GDB_DETACH,
256 TARGET_EVENT_GDB_FLASH_ERASE_START,
257 TARGET_EVENT_GDB_FLASH_ERASE_END,
258 TARGET_EVENT_GDB_FLASH_WRITE_START,
259 TARGET_EVENT_GDB_FLASH_WRITE_END,
262 struct target_event_action {
263 enum target_event event;
264 struct Jim_Interp *interp;
265 struct Jim_Obj *body;
267 struct target_event_action *next;
270 bool target_has_event_action(struct target *target, enum target_event event);
272 struct target_event_callback
274 int (*callback)(struct target *target, enum target_event event, void *priv);
276 struct target_event_callback *next;
279 struct target_timer_callback
281 int (*callback)(void *priv);
286 struct target_timer_callback *next;
289 int target_register_commands(struct command_context *cmd_ctx);
290 int target_examine(void);
292 int target_register_event_callback(
293 int (*callback)(struct target *target,
294 enum target_event event, void *priv),
296 int target_unregister_event_callback(
297 int (*callback)(struct target *target,
298 enum target_event event, void *priv),
300 /* Poll the status of the target, detect any error conditions and report them.
302 * Also note that this fn will clear such error conditions, so a subsequent
303 * invocation will then succeed.
305 * These error conditions can be "sticky" error conditions. E.g. writing
306 * to memory could be implemented as an open loop and if memory writes
307 * fails, then a note is made of it, the error is sticky, but the memory
308 * write loop still runs to completion. This improves performance in the
309 * normal case as there is no need to verify that every single write succeed,
310 * yet it is possible to detect error condtions.
312 int target_poll(struct target *target);
313 int target_resume(struct target *target, int current, uint32_t address,
314 int handle_breakpoints, int debug_execution);
315 int target_halt(struct target *target);
316 int target_call_event_callbacks(struct target *target, enum target_event event);
319 * The period is very approximate, the callback can happen much more often
320 * or much more rarely than specified
322 int target_register_timer_callback(int (*callback)(void *priv),
323 int time_ms, int periodic, void *priv);
325 int target_call_timer_callbacks(void);
327 * Invoke this to ensure that e.g. polling timer callbacks happen before
328 * a syncrhonous command completes.
330 int target_call_timer_callbacks_now(void);
332 struct target* get_current_target(struct command_context *cmd_ctx);
333 struct target *get_target(const char *id);
336 * Get the target type name.
338 * This routine is a wrapper for the target->type->name field.
339 * Note that this is not an instance-specific name for his target.
341 const char *target_type_name(struct target *target);
344 * Examine the specified @a target, letting it perform any
345 * initialization that requires JTAG access.
347 * This routine is a wrapper for target->type->examine.
349 int target_examine_one(struct target *target);
351 /// @returns @c true if target_set_examined() has been called.
352 static inline bool target_was_examined(struct target *target)
354 return target->examined;
357 /// Sets the @c examined flag for the given target.
358 /// Use in target->type->examine() after one-time setup is done.
359 static inline void target_set_examined(struct target *target)
361 target->examined = true;
365 * Add the @a breakpoint for @a target.
367 * This routine is a wrapper for target->type->add_breakpoint.
369 int target_add_breakpoint(struct target *target,
370 struct breakpoint *breakpoint);
372 * Remove the @a breakpoint for @a target.
374 * This routine is a wrapper for target->type->remove_breakpoint.
376 int target_remove_breakpoint(struct target *target,
377 struct breakpoint *breakpoint);
379 * Add the @a watchpoint for @a target.
381 * This routine is a wrapper for target->type->add_watchpoint.
383 int target_add_watchpoint(struct target *target,
384 struct watchpoint *watchpoint);
386 * Remove the @a watchpoint for @a target.
388 * This routine is a wrapper for target->type->remove_watchpoint.
390 int target_remove_watchpoint(struct target *target,
391 struct watchpoint *watchpoint);
394 * Obtain the registers for GDB.
396 * This routine is a wrapper for target->type->get_gdb_reg_list.
398 int target_get_gdb_reg_list(struct target *target,
399 struct reg **reg_list[], int *reg_list_size);
404 * This routine is a wrapper for target->type->step.
406 int target_step(struct target *target,
407 int current, uint32_t address, int handle_breakpoints);
409 * Run an algorithm on the @a target given.
411 * This routine is a wrapper for target->type->run_algorithm.
413 int target_run_algorithm(struct target *target,
414 int num_mem_params, struct mem_param *mem_params,
415 int num_reg_params, struct reg_param *reg_param,
416 uint32_t entry_point, uint32_t exit_point,
417 int timeout_ms, void *arch_info);
420 * Read @a count items of @a size bytes from the memory of @a target at
421 * the @a address given.
423 * This routine is a wrapper for target->type->read_memory.
425 int target_read_memory(struct target *target,
426 uint32_t address, uint32_t size, uint32_t count, uint8_t *buffer);
428 * Write @a count items of @a size bytes to the memory of @a target at
429 * the @a address given. @a address must be aligned to @a size
432 * The endianness is the same in the host and target memory for this
436 * Really @a buffer should have been defined as "const void *" and
437 * @a buffer should have been aligned to @a size in the host memory.
439 * This is not enforced via e.g. assert's today and e.g. the
440 * target_write_buffer fn breaks this assumption.
442 * This routine is wrapper for target->type->write_memory.
444 int target_write_memory(struct target *target,
445 uint32_t address, uint32_t size, uint32_t count, const uint8_t *buffer);
448 * Write @a count items of 4 bytes to the memory of @a target at
449 * the @a address given. Because it operates only on whole words,
450 * this should be faster than target_write_memory().
452 * This routine is wrapper for target->type->bulk_write_memory.
454 int target_bulk_write_memory(struct target *target,
455 uint32_t address, uint32_t count, const uint8_t *buffer);
458 * Write to target memory using the virtual address.
460 * Note that this fn is used to implement software breakpoints. Targets
461 * can implement support for software breakpoints to memory marked as read
462 * only by making this fn write to ram even if it is read only(MMU or
465 * It is sufficient to implement for writing a single word(16 or 32 in
466 * ARM32/16 bit case) to write the breakpoint to ram.
468 * The target should also take care of "other things" to make sure that
469 * software breakpoints can be written using this function. E.g.
470 * when there is a separate instruction and data cache, this fn must
471 * make sure that the instruction cache is synced up to the potential
472 * code change that can happen as a result of the memory write(typically
473 * by invalidating the cache).
475 * The high level wrapper fn in target.c will break down this memory write
476 * request to multiple write requests to the target driver to e.g. guarantee
477 * that writing 4 bytes to an aligned address happens with a single 32 bit
478 * write operation, thus making this fn suitable to e.g. write to special
479 * peripheral registers which do not support byte operations.
481 int target_write_buffer(struct target *target,
482 uint32_t address, uint32_t size, const uint8_t *buffer);
483 int target_read_buffer(struct target *target,
484 uint32_t address, uint32_t size, uint8_t *buffer);
485 int target_checksum_memory(struct target *target,
486 uint32_t address, uint32_t size, uint32_t* crc);
487 int target_blank_check_memory(struct target *target,
488 uint32_t address, uint32_t size, uint32_t* blank);
489 int target_wait_state(struct target *target, enum target_state state, int ms);
491 /** Return the *name* of this targets current state */
492 const char *target_state_name( struct target *target );
496 * if "area" passed in to target_alloc_working_area() points to a memory
497 * location that goes out of scope (e.g. a pointer on the stack), then
498 * the caller of target_alloc_working_area() is responsible for invoking
499 * target_free_working_area() before "area" goes out of scope.
501 * target_free_all_working_areas() will NULL out the "area" pointer
502 * upon resuming or resetting the CPU.
505 int target_alloc_working_area(struct target *target,
506 uint32_t size, struct working_area **area);
507 /* Same as target_alloc_working_area, except that no error is logged
508 * when ERROR_TARGET_RESOURCE_NOT_AVAILABLE is returned.
510 * This allows the calling code to *try* to allocate target memory
511 * and have a fallback to another behavior(slower?).
513 int target_alloc_working_area_try(struct target *target,
514 uint32_t size, struct working_area **area);
515 int target_free_working_area(struct target *target, struct working_area *area);
516 void target_free_all_working_areas(struct target *target);
518 extern struct target *all_targets;
520 uint32_t target_buffer_get_u32(struct target *target, const uint8_t *buffer);
521 uint32_t target_buffer_get_u24(struct target *target, const uint8_t *buffer);
522 uint16_t target_buffer_get_u16(struct target *target, const uint8_t *buffer);
523 void target_buffer_set_u32(struct target *target, uint8_t *buffer, uint32_t value);
524 void target_buffer_set_u24(struct target *target, uint8_t *buffer, uint32_t value);
525 void target_buffer_set_u16(struct target *target, uint8_t *buffer, uint16_t value);
527 int target_read_u32(struct target *target, uint32_t address, uint32_t *value);
528 int target_read_u16(struct target *target, uint32_t address, uint16_t *value);
529 int target_read_u8(struct target *target, uint32_t address, uint8_t *value);
530 int target_write_u32(struct target *target, uint32_t address, uint32_t value);
531 int target_write_u16(struct target *target, uint32_t address, uint16_t value);
532 int target_write_u8(struct target *target, uint32_t address, uint8_t value);
534 /* Issues USER() statements with target state information */
535 int target_arch_state(struct target *target);
537 void target_handle_event(struct target *t, enum target_event e);
539 #define ERROR_TARGET_INVALID (-300)
540 #define ERROR_TARGET_INIT_FAILED (-301)
541 #define ERROR_TARGET_TIMEOUT (-302)
542 #define ERROR_TARGET_NOT_HALTED (-304)
543 #define ERROR_TARGET_FAILURE (-305)
544 #define ERROR_TARGET_UNALIGNED_ACCESS (-306)
545 #define ERROR_TARGET_DATA_ABORT (-307)
546 #define ERROR_TARGET_RESOURCE_NOT_AVAILABLE (-308)
547 #define ERROR_TARGET_TRANSLATION_FAULT (-309)
548 #define ERROR_TARGET_NOT_RUNNING (-310)
549 #define ERROR_TARGET_NOT_EXAMINED (-311)
551 extern bool get_target_reset_nag(void);
553 #endif /* TARGET_H */