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 ***************************************************************************/
38 struct command_context
;
46 * TARGET_UNKNOWN = 0: we don't know anything about the target yet
47 * TARGET_RUNNING = 1: the target is executing user code
48 * TARGET_HALTED = 2: the target is not executing code, and ready to talk to the
49 * debugger. on an xscale it means that the debug handler is executing
50 * TARGET_RESET = 3: the target is being held in reset (only a temporary state,
51 * not sure how this is used with all the recent changes)
52 * TARGET_DEBUG_RUNNING = 4: the target is running, but it is executing code on
53 * behalf of the debugger (e.g. algorithm for flashing)
55 * also see: target_state_name();
63 TARGET_DEBUG_RUNNING
= 4,
71 enum target_reset_mode
{
73 RESET_RUN
= 1, /* reset and let target run */
74 RESET_HALT
= 2, /* reset and halt target out of reset */
75 RESET_INIT
= 3, /* reset and halt target out of reset, then run init script */
78 enum target_debug_reason
{
80 DBG_REASON_BREAKPOINT
= 1,
81 DBG_REASON_WATCHPOINT
= 2,
82 DBG_REASON_WPTANDBKPT
= 3,
83 DBG_REASON_SINGLESTEP
= 4,
84 DBG_REASON_NOTHALTED
= 5,
85 DBG_REASON_UNDEFINED
= 6
88 enum target_endianness
{
89 TARGET_ENDIAN_UNKNOWN
= 0,
90 TARGET_BIG_ENDIAN
= 1, TARGET_LITTLE_ENDIAN
= 2
98 struct working_area
**user
;
99 struct working_area
*next
;
103 struct target
*target
;
104 /* field for smp display */
105 /* element 0 coreid currently displayed ( 1 till n) */
106 /* element 1 coreid to be displayed at next resume 1 till n 0 means resume
107 * all cores core displayed */
111 /* target_type.h contains the full definition of struct target_type */
113 struct target_type
*type
; /* target type definition (name, access functions) */
114 const char *cmd_name
; /* tcl Name of target */
115 int target_number
; /* DO NOT USE! field to be removed in 2010 */
116 struct jtag_tap
*tap
; /* where on the jtag chain is this */
117 int32_t coreid
; /* which device on the TAP? */
118 const char *variant
; /* what variant of this chip is it? */
121 * Indicates whether this target has been examined.
123 * Do @b not access this field directly, use target_was_examined()
124 * or target_set_examined().
129 * true if the target is currently running a downloaded
130 * "algorithm" instead of arbitrary user code. OpenOCD code
131 * invoking algorithms is trusted to maintain correctness of
132 * any cached state (e.g. for flash status), which arbitrary
133 * code will have no reason to know about.
137 struct target_event_action
*event_action
;
139 int reset_halt
; /* attempt resetting the CPU into the halted mode? */
140 uint32_t working_area
; /* working area (initialised RAM). Evaluated
141 * upon first allocation from virtual/physical address. */
142 bool working_area_virt_spec
; /* virtual address specified? */
143 uint32_t working_area_virt
; /* virtual address */
144 bool working_area_phys_spec
; /* virtual address specified? */
145 uint32_t working_area_phys
; /* physical address */
146 uint32_t working_area_size
; /* size in bytes */
147 uint32_t backup_working_area
; /* whether the content of the working area has to be preserved */
148 struct working_area
*working_areas
;/* list of allocated working areas */
149 enum target_debug_reason debug_reason
;/* reason why the target entered debug state */
150 enum target_endianness endianness
; /* target endianness */
151 /* also see: target_state_name() */
152 enum target_state state
; /* the current backend-state (running, halted, ...) */
153 struct reg_cache
*reg_cache
; /* the first register cache of the target (core regs) */
154 struct breakpoint
*breakpoints
; /* list of breakpoints */
155 struct watchpoint
*watchpoints
; /* list of watchpoints */
156 struct trace
*trace_info
; /* generic trace information */
157 struct debug_msg_receiver
*dbgmsg
; /* list of debug message receivers */
158 uint32_t dbg_msg_enabled
; /* debug message status */
159 void *arch_info
; /* architecture specific information */
160 struct target
*next
; /* next target in list */
162 int display
; /* display async info in telnet session. Do not display
163 * lots of halted/resumed info when stepping in debugger. */
164 bool halt_issued
; /* did we transition to halted state? */
165 long long halt_issued_time
; /* Note time when halt was issued */
167 bool dbgbase_set
; /* By default the debug base is not set */
168 uint32_t dbgbase
; /* Really a Cortex-A specific option, but there is no
169 * system in place to support target specific options
171 struct rtos
*rtos
; /* Instance of Real Time Operating System support */
172 bool rtos_auto_detect
; /* A flag that indicates that the RTOS has been specified as "auto"
173 * and must be detected when symbols are offered */
175 int smp
; /* add some target attributes for smp support */
176 struct target_list
*head
;
177 /* the gdb service is there in case of smp, we have only one gdb server
179 * the target attached to the gdb is changing dynamically by changing
180 * gdb_service->target pointer */
181 struct gdb_service
*gdb_service
;
185 struct target
*target
;
186 struct target_list
*next
;
189 /** Returns the instance-specific name of the specified target. */
190 static inline const char *target_name(struct target
*target
)
192 return target
->cmd_name
;
195 const char *debug_reason_name(struct target
*t
);
199 /* allow GDB to do stuff before others handle the halted event,
200 * this is in lieu of defining ordering of invocation of events,
201 * which would be more complicated
203 * Telling GDB to halt does not mean that the target stopped running,
204 * simply that we're dropping out of GDB's waiting for step or continue.
206 * This can be useful when e.g. detecting power dropout.
208 TARGET_EVENT_GDB_HALT
,
209 TARGET_EVENT_HALTED
, /* target entered debug state from normal execution or reset */
210 TARGET_EVENT_RESUMED
, /* target resumed to normal execution */
211 TARGET_EVENT_RESUME_START
,
212 TARGET_EVENT_RESUME_END
,
214 TARGET_EVENT_GDB_START
, /* debugger started execution (step/run) */
215 TARGET_EVENT_GDB_END
, /* debugger stopped execution (step/run) */
217 TARGET_EVENT_RESET_START
,
218 TARGET_EVENT_RESET_ASSERT_PRE
,
219 TARGET_EVENT_RESET_ASSERT
, /* C code uses this instead of SRST */
220 TARGET_EVENT_RESET_ASSERT_POST
,
221 TARGET_EVENT_RESET_DEASSERT_PRE
,
222 TARGET_EVENT_RESET_DEASSERT_POST
,
223 TARGET_EVENT_RESET_HALT_PRE
,
224 TARGET_EVENT_RESET_HALT_POST
,
225 TARGET_EVENT_RESET_WAIT_PRE
,
226 TARGET_EVENT_RESET_WAIT_POST
,
227 TARGET_EVENT_RESET_INIT
,
228 TARGET_EVENT_RESET_END
,
230 TARGET_EVENT_DEBUG_HALTED
, /* target entered debug state, but was executing on behalf of the debugger */
231 TARGET_EVENT_DEBUG_RESUMED
, /* target resumed to execute on behalf of the debugger */
233 TARGET_EVENT_EXAMINE_START
,
234 TARGET_EVENT_EXAMINE_END
,
236 TARGET_EVENT_GDB_ATTACH
,
237 TARGET_EVENT_GDB_DETACH
,
239 TARGET_EVENT_GDB_FLASH_ERASE_START
,
240 TARGET_EVENT_GDB_FLASH_ERASE_END
,
241 TARGET_EVENT_GDB_FLASH_WRITE_START
,
242 TARGET_EVENT_GDB_FLASH_WRITE_END
,
245 struct target_event_action
{
246 enum target_event event
;
247 struct Jim_Interp
*interp
;
248 struct Jim_Obj
*body
;
250 struct target_event_action
*next
;
253 bool target_has_event_action(struct target
*target
, enum target_event event
);
255 struct target_event_callback
{
256 int (*callback
)(struct target
*target
, enum target_event event
, void *priv
);
258 struct target_event_callback
*next
;
261 struct target_timer_callback
{
262 int (*callback
)(void *priv
);
267 struct target_timer_callback
*next
;
270 int target_register_commands(struct command_context
*cmd_ctx
);
271 int target_examine(void);
273 int target_register_event_callback(
274 int (*callback
)(struct target
*target
,
275 enum target_event event
, void *priv
),
277 int target_unregister_event_callback(
278 int (*callback
)(struct target
*target
,
279 enum target_event event
, void *priv
),
282 /* Poll the status of the target, detect any error conditions and report them.
284 * Also note that this fn will clear such error conditions, so a subsequent
285 * invocation will then succeed.
287 * These error conditions can be "sticky" error conditions. E.g. writing
288 * to memory could be implemented as an open loop and if memory writes
289 * fails, then a note is made of it, the error is sticky, but the memory
290 * write loop still runs to completion. This improves performance in the
291 * normal case as there is no need to verify that every single write succeed,
292 * yet it is possible to detect error conditions.
294 int target_poll(struct target
*target
);
295 int target_resume(struct target
*target
, int current
, uint32_t address
,
296 int handle_breakpoints
, int debug_execution
);
297 int target_halt(struct target
*target
);
298 int target_call_event_callbacks(struct target
*target
, enum target_event event
);
301 * The period is very approximate, the callback can happen much more often
302 * or much more rarely than specified
304 int target_register_timer_callback(int (*callback
)(void *priv
),
305 int time_ms
, int periodic
, void *priv
);
307 int target_call_timer_callbacks(void);
309 * Invoke this to ensure that e.g. polling timer callbacks happen before
310 * a synchronous command completes.
312 int target_call_timer_callbacks_now(void);
314 struct target
*get_current_target(struct command_context
*cmd_ctx
);
315 struct target
*get_target(const char *id
);
318 * Get the target type name.
320 * This routine is a wrapper for the target->type->name field.
321 * Note that this is not an instance-specific name for his target.
323 const char *target_type_name(struct target
*target
);
326 * Examine the specified @a target, letting it perform any
327 * Initialisation that requires JTAG access.
329 * This routine is a wrapper for target->type->examine.
331 int target_examine_one(struct target
*target
);
333 /** @returns @c true if target_set_examined() has been called. */
334 static inline bool target_was_examined(struct target
*target
)
336 return target
->examined
;
339 /** Sets the @c examined flag for the given target. */
340 /** Use in target->type->examine() after one-time setup is done. */
341 static inline void target_set_examined(struct target
*target
)
343 target
->examined
= true;
347 * Add the @a breakpoint for @a target.
349 * This routine is a wrapper for target->type->add_breakpoint.
351 int target_add_breakpoint(struct target
*target
,
352 struct breakpoint
*breakpoint
);
354 * Add the @a ContextID breakpoint for @a target.
356 * This routine is a wrapper for target->type->add_context_breakpoint.
358 int target_add_context_breakpoint(struct target
*target
,
359 struct breakpoint
*breakpoint
);
361 * Add the @a ContextID & IVA breakpoint for @a target.
363 * This routine is a wrapper for target->type->add_hybrid_breakpoint.
365 int target_add_hybrid_breakpoint(struct target
*target
,
366 struct breakpoint
*breakpoint
);
368 * Remove the @a breakpoint for @a target.
370 * This routine is a wrapper for target->type->remove_breakpoint.
373 int target_remove_breakpoint(struct target
*target
,
374 struct breakpoint
*breakpoint
);
376 * Add the @a watchpoint for @a target.
378 * This routine is a wrapper for target->type->add_watchpoint.
380 int target_add_watchpoint(struct target
*target
,
381 struct watchpoint
*watchpoint
);
383 * Remove the @a watchpoint for @a target.
385 * This routine is a wrapper for target->type->remove_watchpoint.
387 int target_remove_watchpoint(struct target
*target
,
388 struct watchpoint
*watchpoint
);
391 * Obtain the registers for GDB.
393 * This routine is a wrapper for target->type->get_gdb_reg_list.
395 int target_get_gdb_reg_list(struct target
*target
,
396 struct reg
**reg_list
[], int *reg_list_size
);
401 * This routine is a wrapper for target->type->step.
403 int target_step(struct target
*target
,
404 int current
, uint32_t address
, int handle_breakpoints
);
406 * Run an algorithm on the @a target given.
408 * This routine is a wrapper for target->type->run_algorithm.
410 int target_run_algorithm(struct target
*target
,
411 int num_mem_params
, struct mem_param
*mem_params
,
412 int num_reg_params
, struct reg_param
*reg_param
,
413 uint32_t entry_point
, uint32_t exit_point
,
414 int timeout_ms
, void *arch_info
);
417 * Starts an algorithm in the background on the @a target given.
419 * This routine is a wrapper for target->type->start_algorithm.
421 int target_start_algorithm(struct target
*target
,
422 int num_mem_params
, struct mem_param
*mem_params
,
423 int num_reg_params
, struct reg_param
*reg_params
,
424 uint32_t entry_point
, uint32_t exit_point
,
428 * Wait for an algorithm on the @a target given.
430 * This routine is a wrapper for target->type->wait_algorithm.
432 int target_wait_algorithm(struct target
*target
,
433 int num_mem_params
, struct mem_param
*mem_params
,
434 int num_reg_params
, struct reg_param
*reg_params
,
435 uint32_t exit_point
, int timeout_ms
,
439 * This routine is a wrapper for asynchronous algorithms.
442 int target_run_flash_async_algorithm(struct target
*target
,
443 uint8_t *buffer
, uint32_t count
, int block_size
,
444 int num_mem_params
, struct mem_param
*mem_params
,
445 int num_reg_params
, struct reg_param
*reg_params
,
446 uint32_t buffer_start
, uint32_t buffer_size
,
447 uint32_t entry_point
, uint32_t exit_point
,
451 * Read @a count items of @a size bytes from the memory of @a target at
452 * the @a address given.
454 * This routine is a wrapper for target->type->read_memory.
456 int target_read_memory(struct target
*target
,
457 uint32_t address
, uint32_t size
, uint32_t count
, uint8_t *buffer
);
459 * Write @a count items of @a size bytes to the memory of @a target at
460 * the @a address given. @a address must be aligned to @a size
463 * The endianness is the same in the host and target memory for this
467 * Really @a buffer should have been defined as "const void *" and
468 * @a buffer should have been aligned to @a size in the host memory.
470 * This is not enforced via e.g. assert's today and e.g. the
471 * target_write_buffer fn breaks this assumption.
473 * This routine is wrapper for target->type->write_memory.
475 int target_write_memory(struct target
*target
,
476 uint32_t address
, uint32_t size
, uint32_t count
, const uint8_t *buffer
);
479 * Write @a count items of 4 bytes to the memory of @a target at
480 * the @a address given. Because it operates only on whole words,
481 * this should be faster than target_write_memory().
483 * This routine is wrapper for target->type->bulk_write_memory.
485 int target_bulk_write_memory(struct target
*target
,
486 uint32_t address
, uint32_t count
, const uint8_t *buffer
);
489 * Write to target memory using the virtual address.
491 * Note that this fn is used to implement software breakpoints. Targets
492 * can implement support for software breakpoints to memory marked as read
493 * only by making this fn write to ram even if it is read only(MMU or
496 * It is sufficient to implement for writing a single word(16 or 32 in
497 * ARM32/16 bit case) to write the breakpoint to ram.
499 * The target should also take care of "other things" to make sure that
500 * software breakpoints can be written using this function. E.g.
501 * when there is a separate instruction and data cache, this fn must
502 * make sure that the instruction cache is synced up to the potential
503 * code change that can happen as a result of the memory write(typically
504 * by invalidating the cache).
506 * The high level wrapper fn in target.c will break down this memory write
507 * request to multiple write requests to the target driver to e.g. guarantee
508 * that writing 4 bytes to an aligned address happens with a single 32 bit
509 * write operation, thus making this fn suitable to e.g. write to special
510 * peripheral registers which do not support byte operations.
512 int target_write_buffer(struct target
*target
,
513 uint32_t address
, uint32_t size
, const uint8_t *buffer
);
514 int target_read_buffer(struct target
*target
,
515 uint32_t address
, uint32_t size
, uint8_t *buffer
);
516 int target_checksum_memory(struct target
*target
,
517 uint32_t address
, uint32_t size
, uint32_t *crc
);
518 int target_blank_check_memory(struct target
*target
,
519 uint32_t address
, uint32_t size
, uint32_t *blank
);
520 int target_wait_state(struct target
*target
, enum target_state state
, int ms
);
522 /** Return the *name* of this targets current state */
523 const char *target_state_name(struct target
*target
);
527 * if "area" passed in to target_alloc_working_area() points to a memory
528 * location that goes out of scope (e.g. a pointer on the stack), then
529 * the caller of target_alloc_working_area() is responsible for invoking
530 * target_free_working_area() before "area" goes out of scope.
532 * target_free_all_working_areas() will NULL out the "area" pointer
533 * upon resuming or resetting the CPU.
536 int target_alloc_working_area(struct target
*target
,
537 uint32_t size
, struct working_area
**area
);
538 /* Same as target_alloc_working_area, except that no error is logged
539 * when ERROR_TARGET_RESOURCE_NOT_AVAILABLE is returned.
541 * This allows the calling code to *try* to allocate target memory
542 * and have a fallback to another behaviour(slower?).
544 int target_alloc_working_area_try(struct target
*target
,
545 uint32_t size
, struct working_area
**area
);
546 int target_free_working_area(struct target
*target
, struct working_area
*area
);
547 void target_free_all_working_areas(struct target
*target
);
548 uint32_t target_get_working_area_avail(struct target
*target
);
550 extern struct target
*all_targets
;
552 uint32_t target_buffer_get_u32(struct target
*target
, const uint8_t *buffer
);
553 uint32_t target_buffer_get_u24(struct target
*target
, const uint8_t *buffer
);
554 uint16_t target_buffer_get_u16(struct target
*target
, const uint8_t *buffer
);
555 void target_buffer_set_u32(struct target
*target
, uint8_t *buffer
, uint32_t value
);
556 void target_buffer_set_u24(struct target
*target
, uint8_t *buffer
, uint32_t value
);
557 void target_buffer_set_u16(struct target
*target
, uint8_t *buffer
, uint16_t value
);
559 void target_buffer_get_u32_array(struct target
*target
, const uint8_t *buffer
, uint32_t count
, uint32_t *dstbuf
);
560 void target_buffer_get_u16_array(struct target
*target
, const uint8_t *buffer
, uint32_t count
, uint16_t *dstbuf
);
561 void target_buffer_set_u32_array(struct target
*target
, uint8_t *buffer
, uint32_t count
, uint32_t *srcbuf
);
562 void target_buffer_set_u16_array(struct target
*target
, uint8_t *buffer
, uint32_t count
, uint16_t *srcbuf
);
564 int target_read_u32(struct target
*target
, uint32_t address
, uint32_t *value
);
565 int target_read_u16(struct target
*target
, uint32_t address
, uint16_t *value
);
566 int target_read_u8(struct target
*target
, uint32_t address
, uint8_t *value
);
567 int target_write_u32(struct target
*target
, uint32_t address
, uint32_t value
);
568 int target_write_u16(struct target
*target
, uint32_t address
, uint16_t value
);
569 int target_write_u8(struct target
*target
, uint32_t address
, uint8_t value
);
571 /* Issues USER() statements with target state information */
572 int target_arch_state(struct target
*target
);
574 void target_handle_event(struct target
*t
, enum target_event e
);
576 #define ERROR_TARGET_INVALID (-300)
577 #define ERROR_TARGET_INIT_FAILED (-301)
578 #define ERROR_TARGET_TIMEOUT (-302)
579 #define ERROR_TARGET_NOT_HALTED (-304)
580 #define ERROR_TARGET_FAILURE (-305)
581 #define ERROR_TARGET_UNALIGNED_ACCESS (-306)
582 #define ERROR_TARGET_DATA_ABORT (-307)
583 #define ERROR_TARGET_RESOURCE_NOT_AVAILABLE (-308)
584 #define ERROR_TARGET_TRANSLATION_FAULT (-309)
585 #define ERROR_TARGET_NOT_RUNNING (-310)
586 #define ERROR_TARGET_NOT_EXAMINED (-311)
588 extern bool get_target_reset_nag(void);
590 #endif /* TARGET_H */
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