1 /***************************************************************************
2 * Copyright (C) 2005 by Dominic Rath *
3 * Dominic.Rath@gmx.de *
5 * Copyright (C) 2007,2008 Øyvind Harboe *
6 * oyvind.harboe@zylin.com *
8 * Copyright (C) 2008 by Spencer Oliver *
9 * spen@spen-soft.co.uk *
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. *
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. *
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 ***************************************************************************/
30 #include "breakpoints.h"
31 #include "algorithm.h"
41 struct command_context_s
;
43 TARGET_UNKNOWN = 0: we don't know anything about the target yet
44 TARGET_RUNNING = 1: the target is executing user code
45 TARGET_HALTED = 2: the target is not executing code, and ready to talk to the
46 debugger. on an xscale it means that the debug handler is executing
47 TARGET_RESET = 3: the target is being held in reset (only a temporary state,
48 not sure how this is used with all the recent changes)
49 TARGET_DEBUG_RUNNING = 4: the target is running, but it is executing code on
50 behalf of the debugger (e.g. algorithm for flashing)
58 TARGET_DEBUG_RUNNING
= 4,
61 extern const Jim_Nvp nvp_target_state
[];
68 extern const Jim_Nvp nvp_assert
[];
70 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 extern const Jim_Nvp nvp_reset_mode
[];
80 enum target_debug_reason
83 DBG_REASON_BREAKPOINT
= 1,
84 DBG_REASON_WATCHPOINT
= 2,
85 DBG_REASON_WPTANDBKPT
= 3,
86 DBG_REASON_SINGLESTEP
= 4,
87 DBG_REASON_NOTHALTED
= 5,
88 DBG_REASON_UNDEFINED
= 6
91 extern const Jim_Nvp nvp_target_debug_reason
[];
95 TARGET_ENDIAN_UNKNOWN
=0,
96 TARGET_BIG_ENDIAN
= 1, TARGET_LITTLE_ENDIAN
= 2
99 extern const Jim_Nvp nvp_target_endian
[];
103 typedef struct working_area_s
109 struct working_area_s
**user
;
110 struct working_area_s
*next
;
113 typedef struct target_type_s
119 /* poll current target status */
120 int (*poll
)(struct target_s
*target
);
121 /* Invoked only from target_arch_state().
122 * Issue USER() w/architecture specific status. */
123 int (*arch_state
)(struct target_s
*target
);
125 /* target request support */
126 int (*target_request_data
)(struct target_s
*target
, u32 size
, u8
*buffer
);
128 /* halt will log a warning, but return ERROR_OK if the target is already halted. */
129 int (*halt
)(struct target_s
*target
);
130 int (*resume
)(struct target_s
*target
, int current
, u32 address
, int handle_breakpoints
, int debug_execution
);
131 int (*step
)(struct target_s
*target
, int current
, u32 address
, int handle_breakpoints
);
133 /* target reset control. assert reset can be invoked when OpenOCD and
134 * the target is out of sync.
136 * A typical example is that the target was power cycled while OpenOCD
137 * thought the target was halted or running.
139 * assert_reset() can therefore make no assumptions whatsoever about the
140 * state of the target
142 * Before assert_reset() for the target is invoked, a TRST/tms and
143 * chain validation is executed. TRST should not be asserted
144 * during target assert unless there is no way around it due to
145 * the way reset's are configured.
148 int (*assert_reset
)(struct target_s
*target
);
149 int (*deassert_reset
)(struct target_s
*target
);
150 int (*soft_reset_halt_imp
)(struct target_s
*target
);
151 int (*soft_reset_halt
)(struct target_s
*target
);
153 /* target register access for gdb.
155 * Danger! this function will succeed even if the target is running
156 * and return a register list with dummy values.
158 * The reason is that GDB connection will fail without a valid register
159 * list, however it is after GDB is connected that monitor commands can
160 * be run to properly initialize the target
162 int (*get_gdb_reg_list
)(struct target_s
*target
, struct reg_s
**reg_list
[], int *reg_list_size
);
164 /* target memory access
165 * size: 1 = byte (8bit), 2 = half-word (16bit), 4 = word (32bit)
166 * count: number of items of <size>
168 int (*read_memory_imp
)(struct target_s
*target
, u32 address
, u32 size
, u32 count
, u8
*buffer
);
169 int (*read_memory
)(struct target_s
*target
, u32 address
, u32 size
, u32 count
, u8
*buffer
);
170 int (*write_memory_imp
)(struct target_s
*target
, u32 address
, u32 size
, u32 count
, u8
*buffer
);
171 int (*write_memory
)(struct target_s
*target
, u32 address
, u32 size
, u32 count
, u8
*buffer
);
173 /* write target memory in multiples of 4 byte, optimized for writing large quantities of data */
174 int (*bulk_write_memory
)(struct target_s
*target
, u32 address
, u32 count
, u8
*buffer
);
176 int (*checksum_memory
)(struct target_s
*target
, u32 address
, u32 count
, u32
* checksum
);
177 int (*blank_check_memory
)(struct target_s
*target
, u32 address
, u32 count
, u32
* blank
);
180 * target break-/watchpoint control
181 * rw: 0 = write, 1 = read, 2 = access
183 * Target must be halted while this is invoked as this
184 * will actually set up breakpoints on target.
186 * The breakpoint hardware will be set up upon adding the first breakpoint.
188 * Upon GDB connection all breakpoints/watchpoints are cleared.
190 int (*add_breakpoint
)(struct target_s
*target
, breakpoint_t
*breakpoint
);
192 /* remove breakpoint. hw will only be updated if the target is currently halted.
193 * However, this method can be invoked on unresponsive targets.
195 int (*remove_breakpoint
)(struct target_s
*target
, breakpoint_t
*breakpoint
);
196 int (*add_watchpoint
)(struct target_s
*target
, watchpoint_t
*watchpoint
);
197 /* remove watchpoint. hw will only be updated if the target is currently halted.
198 * However, this method can be invoked on unresponsive targets.
200 int (*remove_watchpoint
)(struct target_s
*target
, watchpoint_t
*watchpoint
);
202 /* target algorithm support */
203 int (*run_algorithm_imp
)(struct target_s
*target
, int num_mem_params
, mem_param_t
*mem_params
, int num_reg_params
, reg_param_t
*reg_param
, u32 entry_point
, u32 exit_point
, int timeout_ms
, void *arch_info
);
204 int (*run_algorithm
)(struct target_s
*target
, int num_mem_params
, mem_param_t
*mem_params
, int num_reg_params
, reg_param_t
*reg_param
, u32 entry_point
, u32 exit_point
, int timeout_ms
, void *arch_info
);
206 int (*register_commands
)(struct command_context_s
*cmd_ctx
);
208 /* called when target is created */
209 int (*target_create
)( struct target_s
*target
, Jim_Interp
*interp
);
211 /* called for various config parameters */
212 /* returns JIM_CONTINUE - if option not understood */
213 /* otherwise: JIM_OK, or JIM_ERR, */
214 int (*target_jim_configure
)( struct target_s
*target
, Jim_GetOptInfo
*goi
);
216 /* target commands specifically handled by the target */
217 /* returns JIM_OK, or JIM_ERR, or JIM_CONTINUE - if option not understood */
218 int (*target_jim_commands
)( struct target_s
*target
, Jim_GetOptInfo
*goi
);
220 /* invoked after JTAG chain has been examined & validated. During
221 * this stage the target is examined and any additional setup is
224 * invoked every time after the jtag chain has been validated/examined
226 int (*examine
)(struct target_s
*target
);
227 /* Set up structures for target.
229 * It is illegal to talk to the target at this stage as this fn is invoked
230 * before the JTAG chain has been examined/verified
232 int (*init_target
)(struct command_context_s
*cmd_ctx
, struct target_s
*target
);
235 int (*virt2phys
)(struct target_s
*target
, u32 address
, u32
*physical
);
236 int (*mmu
)(struct target_s
*target
, int *enabled
);
240 // forward decloration
241 typedef struct target_event_action_s target_event_action_t
;
243 typedef struct target_s
245 target_type_t
*type
; /* target type definition (name, access functions) */
246 const char *cmd_name
; /* tcl Name of target */
247 int target_number
; /* generaly, target index but may not be in order */
248 int chain_position
; /* where on the jtag chain is this */
249 const char *variant
; /* what varient of this chip is it? */
250 target_event_action_t
*event_action
;
252 int reset_halt
; /* attempt resetting the CPU into the halted mode? */
253 u32 working_area
; /* working area (initialized RAM). Evaluated
254 upon first allocation from virtual/physical address. */
255 u32 working_area_virt
; /* virtual address */
256 u32 working_area_phys
; /* physical address */
257 u32 working_area_size
; /* size in bytes */
258 u32 backup_working_area
; /* whether the content of the working area has to be preserved */
259 struct working_area_s
*working_areas
;/* list of allocated working areas */
260 enum target_debug_reason debug_reason
;/* reason why the target entered debug state */
261 enum target_endianess endianness
; /* target endianess */
262 enum target_state state
; /* the current backend-state (running, halted, ...) */
263 struct reg_cache_s
*reg_cache
; /* the first register cache of the target (core regs) */
264 struct breakpoint_s
*breakpoints
; /* list of breakpoints */
265 struct watchpoint_s
*watchpoints
; /* list of watchpoints */
266 struct trace_s
*trace_info
; /* generic trace information */
267 struct debug_msg_receiver_s
*dbgmsg
;/* list of debug message receivers */
268 u32 dbg_msg_enabled
; /* debug message status */
269 void *arch_info
; /* architecture specific information */
270 struct target_s
*next
; /* next target in list */
272 int display
; /* display async info in telnet session. Do not display
273 lots of halted/resumed info when stepping in debugger. */
278 // OLD historical names
279 // - Prior to the great TCL change
280 // - June/July/Aug 2008
282 TARGET_EVENT_OLD_gdb_program_config
,
283 TARGET_EVENT_OLD_pre_reset
,
284 TARGET_EVENT_OLD_post_reset
,
285 TARGET_EVENT_OLD_pre_resume
,
287 /* allow GDB to do stuff before others handle the halted event,
288 this is in lieu of defining ordering of invocation of events,
289 which would be more complicated */
290 TARGET_EVENT_EARLY_HALTED
,
291 TARGET_EVENT_HALTED
, /* target entered debug state from normal execution or reset */
292 TARGET_EVENT_RESUMED
, /* target resumed to normal execution */
293 TARGET_EVENT_RESUME_START
,
294 TARGET_EVENT_RESUME_END
,
296 TARGET_EVENT_GDB_START
, /* debugger started execution (step/run) */
297 TARGET_EVENT_GDB_END
, /* debugger stopped execution (step/run) */
299 TARGET_EVENT_RESET_START
,
300 TARGET_EVENT_RESET_ASSERT_PRE
,
301 TARGET_EVENT_RESET_ASSERT_POST
,
302 TARGET_EVENT_RESET_DEASSERT_PRE
,
303 TARGET_EVENT_RESET_DEASSERT_POST
,
304 TARGET_EVENT_RESET_HALT_PRE
,
305 TARGET_EVENT_RESET_HALT_POST
,
306 TARGET_EVENT_RESET_WAIT_PRE
,
307 TARGET_EVENT_RESET_WAIT_POST
,
308 TARGET_EVENT_RESET_INIT
,
309 TARGET_EVENT_RESET_END
,
312 TARGET_EVENT_DEBUG_HALTED
, /* target entered debug state, but was executing on behalf of the debugger */
313 TARGET_EVENT_DEBUG_RESUMED
, /* target resumed to execute on behalf of the debugger */
315 TARGET_EVENT_EXAMINE_START
,
316 TARGET_EVENT_EXAMINE_END
,
319 TARGET_EVENT_GDB_ATTACH
,
320 TARGET_EVENT_GDB_DETACH
,
322 TARGET_EVENT_GDB_FLASH_ERASE_START
,
323 TARGET_EVENT_GDB_FLASH_ERASE_END
,
324 TARGET_EVENT_GDB_FLASH_WRITE_START
,
325 TARGET_EVENT_GDB_FLASH_WRITE_END
,
328 extern const Jim_Nvp nvp_target_event
[];
330 struct target_event_action_s
{
331 enum target_event event
;
334 target_event_action_t
*next
;
337 typedef struct target_event_callback_s
339 int (*callback
)(struct target_s
*target
, enum target_event event
, void *priv
);
341 struct target_event_callback_s
*next
;
342 } target_event_callback_t
;
344 typedef struct target_timer_callback_s
346 int (*callback
)(void *priv
);
351 struct target_timer_callback_s
*next
;
352 } target_timer_callback_t
;
354 extern int target_register_commands(struct command_context_s
*cmd_ctx
);
355 extern int target_register_user_commands(struct command_context_s
*cmd_ctx
);
356 extern int target_init(struct command_context_s
*cmd_ctx
);
357 extern int target_examine(void);
358 extern int handle_target(void *priv
);
359 extern int target_process_reset(struct command_context_s
*cmd_ctx
, enum target_reset_mode reset_mode
);
361 extern int target_register_event_callback(int (*callback
)(struct target_s
*target
, enum target_event event
, void *priv
), void *priv
);
362 extern int target_unregister_event_callback(int (*callback
)(struct target_s
*target
, enum target_event event
, void *priv
), void *priv
);
363 extern int target_poll(target_t
*target
);
364 extern int target_resume(target_t
*target
, int current
, u32 address
, int handle_breakpoints
, int debug_execution
);
365 extern int target_halt(target_t
*target
);
366 extern int target_call_event_callbacks(target_t
*target
, enum target_event event
);
368 /* The period is very approximate, the callback can happen much more often
369 * or much more rarely than specified
371 extern int target_register_timer_callback(int (*callback
)(void *priv
), int time_ms
, int periodic
, void *priv
);
372 extern int target_unregister_timer_callback(int (*callback
)(void *priv
), void *priv
);
373 extern int target_call_timer_callbacks(void);
374 /* invoke this to ensure that e.g. polling timer callbacks happen before
375 * a syncrhonous command completes.
377 extern int target_call_timer_callbacks_now(void);
379 extern target_t
* get_current_target(struct command_context_s
*cmd_ctx
);
380 extern int get_num_by_target(target_t
*query_target
);
381 extern target_t
* get_target_by_num(int num
);
383 extern int target_write_buffer(struct target_s
*target
, u32 address
, u32 size
, u8
*buffer
);
384 extern int target_read_buffer(struct target_s
*target
, u32 address
, u32 size
, u8
*buffer
);
385 extern int target_checksum_memory(struct target_s
*target
, u32 address
, u32 size
, u32
* crc
);
386 extern int target_blank_check_memory(struct target_s
*target
, u32 address
, u32 size
, u32
* blank
);
387 extern int target_wait_state(target_t
*target
, enum target_state state
, int ms
);
391 * if "area" passed in to target_alloc_working_area() points to a memory
392 * location that goes out of scope (e.g. a pointer on the stack), then
393 * the caller of target_alloc_working_area() is responsible for invoking
394 * target_free_working_area() before "area" goes out of scope.
396 * target_free_all_working_areas() will NULL out the "area" pointer
397 * upon resuming or resetting the CPU.
400 extern int target_alloc_working_area(struct target_s
*target
, u32 size
, working_area_t
**area
);
401 extern int target_free_working_area(struct target_s
*target
, working_area_t
*area
);
402 extern int target_free_working_area_restore(struct target_s
*target
, working_area_t
*area
, int restore
);
403 extern void target_free_all_working_areas(struct target_s
*target
);
404 extern void target_free_all_working_areas_restore(struct target_s
*target
, int restore
);
406 extern target_t
*all_targets
;
408 extern target_event_callback_t
*target_event_callbacks
;
409 extern target_timer_callback_t
*target_timer_callbacks
;
411 extern u32
target_buffer_get_u32(target_t
*target
, u8
*buffer
);
412 extern u16
target_buffer_get_u16(target_t
*target
, u8
*buffer
);
413 extern u8
target_buffer_get_u8 (target_t
*target
, u8
*buffer
);
414 extern void target_buffer_set_u32(target_t
*target
, u8
*buffer
, u32 value
);
415 extern void target_buffer_set_u16(target_t
*target
, u8
*buffer
, u16 value
);
416 extern void target_buffer_set_u8 (target_t
*target
, u8
*buffer
, u8 value
);
418 int target_read_u32(struct target_s
*target
, u32 address
, u32
*value
);
419 int target_read_u16(struct target_s
*target
, u32 address
, u16
*value
);
420 int target_read_u8(struct target_s
*target
, u32 address
, u8
*value
);
421 int target_write_u32(struct target_s
*target
, u32 address
, u32 value
);
422 int target_write_u16(struct target_s
*target
, u32 address
, u16 value
);
423 int target_write_u8(struct target_s
*target
, u32 address
, u8 value
);
425 /* Issues USER() statements with target state information */
426 int target_arch_state(struct target_s
*target
);
428 void target_handle_event( target_t
*t
, enum target_event e
);
429 void target_all_handle_event( enum target_event e
);
432 #define ERROR_TARGET_INVALID (-300)
433 #define ERROR_TARGET_INIT_FAILED (-301)
434 #define ERROR_TARGET_TIMEOUT (-302)
435 #define ERROR_TARGET_NOT_HALTED (-304)
436 #define ERROR_TARGET_FAILURE (-305)
437 #define ERROR_TARGET_UNALIGNED_ACCESS (-306)
438 #define ERROR_TARGET_DATA_ABORT (-307)
439 #define ERROR_TARGET_RESOURCE_NOT_AVAILABLE (-308)
440 #define ERROR_TARGET_TRANSLATION_FAULT (-309)
441 #define ERROR_TARGET_NOT_RUNNING (-310)
442 #define ERROR_TARGET_NOT_EXAMINED (-311)
444 extern const Jim_Nvp nvp_error_target
[];
445 extern const char *target_strerror_safe( int err
);
447 #endif /* TARGET_H */