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openocd/src/target/target.h

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/***************************************************************************
* Copyright (C) 2005 by Dominic Rath *
* Dominic.Rath@gmx.de *
* *
* Copyright (C) 2007,2008 Øyvind Harboe *
* oyvind.harboe@zylin.com *
* *
* Copyright (C) 2008 by Spencer Oliver *
* spen@spen-soft.co.uk *
* *
* This program is free software; you can redistribute it and/or modify *
* it under the terms of the GNU General Public License as published by *
* the Free Software Foundation; either version 2 of the License, or *
* (at your option) any later version. *
* *
* This program is distributed in the hope that it will be useful, *
* but WITHOUT ANY WARRANTY; without even the implied warranty of *
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the *
* GNU General Public License for more details. *
* *
* You should have received a copy of the GNU General Public License *
* along with this program; if not, write to the *
* Free Software Foundation, Inc., *
* 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. *
***************************************************************************/
#ifndef TARGET_H
#define TARGET_H
#include "register.h"
#include "breakpoints.h"
#include "algorithm.h"
#include "trace.h"
#include "command.h"
#include "types.h"
#include <sys/time.h>
#include <time.h>
struct reg_s;
struct command_context_s;
/*
TARGET_UNKNOWN = 0: we don't know anything about the target yet
TARGET_RUNNING = 1: the target is executing user code
TARGET_HALTED = 2: the target is not executing code, and ready to talk to the
debugger. on an xscale it means that the debug handler is executing
TARGET_RESET = 3: the target is being held in reset (only a temporary state,
not sure how this is used with all the recent changes)
TARGET_DEBUG_RUNNING = 4: the target is running, but it is executing code on
behalf of the debugger (e.g. algorithm for flashing)
*/
enum target_state
{
TARGET_UNKNOWN = 0,
TARGET_RUNNING = 1,
TARGET_HALTED = 2,
TARGET_RESET = 3,
TARGET_DEBUG_RUNNING = 4,
};
extern const Jim_Nvp nvp_target_state[];
enum nvp_assert {
NVP_DEASSERT,
NVP_ASSERT,
};
extern const Jim_Nvp nvp_assert[];
enum target_reset_mode
{
RESET_UNKNOWN = 0,
RESET_RUN = 1, /* reset and let target run */
RESET_HALT = 2, /* reset and halt target out of reset */
RESET_INIT = 3, /* reset and halt target out of reset, then run init script */
};
extern const Jim_Nvp nvp_reset_mode[];
enum target_debug_reason
{
DBG_REASON_DBGRQ = 0,
DBG_REASON_BREAKPOINT = 1,
DBG_REASON_WATCHPOINT = 2,
DBG_REASON_WPTANDBKPT = 3,
DBG_REASON_SINGLESTEP = 4,
DBG_REASON_NOTHALTED = 5,
DBG_REASON_UNDEFINED = 6
};
extern const Jim_Nvp nvp_target_debug_reason[];
enum target_endianess
{
TARGET_ENDIAN_UNKNOWN=0,
TARGET_BIG_ENDIAN = 1, TARGET_LITTLE_ENDIAN = 2
};
extern const Jim_Nvp nvp_target_endian[];
struct target_s;
typedef struct working_area_s
{
u32 address;
u32 size;
int free;
u8 *backup;
struct working_area_s **user;
struct working_area_s *next;
} working_area_t;
typedef struct target_type_s
{
char *name;
int examined;
/* poll current target status */
int (*poll)(struct target_s *target);
/* Invoked only from target_arch_state().
* Issue USER() w/architecture specific status. */
int (*arch_state)(struct target_s *target);
/* target request support */
int (*target_request_data)(struct target_s *target, u32 size, u8 *buffer);
/* halt will log a warning, but return ERROR_OK if the target is already halted. */
int (*halt)(struct target_s *target);
int (*resume)(struct target_s *target, int current, u32 address, int handle_breakpoints, int debug_execution);
int (*step)(struct target_s *target, int current, u32 address, int handle_breakpoints);
/* target reset control. assert reset can be invoked when OpenOCD and
* the target is out of sync.
*
* A typical example is that the target was power cycled while OpenOCD
* thought the target was halted or running.
*
* assert_reset() can therefore make no assumptions whatsoever about the
* state of the target
*
* Before assert_reset() for the target is invoked, a TRST/tms and
* chain validation is executed. TRST should not be asserted
* during target assert unless there is no way around it due to
* the way reset's are configured.
*
*/
int (*assert_reset)(struct target_s *target);
int (*deassert_reset)(struct target_s *target);
int (*soft_reset_halt_imp)(struct target_s *target);
int (*soft_reset_halt)(struct target_s *target);
/* target register access for gdb.
*
* Danger! this function will succeed even if the target is running
* and return a register list with dummy values.
*
* The reason is that GDB connection will fail without a valid register
* list, however it is after GDB is connected that monitor commands can
* be run to properly initialize the target
*/
int (*get_gdb_reg_list)(struct target_s *target, struct reg_s **reg_list[], int *reg_list_size);
/* target memory access
* size: 1 = byte (8bit), 2 = half-word (16bit), 4 = word (32bit)
* count: number of items of <size>
*/
int (*read_memory_imp)(struct target_s *target, u32 address, u32 size, u32 count, u8 *buffer);
int (*read_memory)(struct target_s *target, u32 address, u32 size, u32 count, u8 *buffer);
int (*write_memory_imp)(struct target_s *target, u32 address, u32 size, u32 count, u8 *buffer);
int (*write_memory)(struct target_s *target, u32 address, u32 size, u32 count, u8 *buffer);
/* write target memory in multiples of 4 byte, optimized for writing large quantities of data */
int (*bulk_write_memory)(struct target_s *target, u32 address, u32 count, u8 *buffer);
int (*checksum_memory)(struct target_s *target, u32 address, u32 count, u32* checksum);
int (*blank_check_memory)(struct target_s *target, u32 address, u32 count, u32* blank);
/*
* target break-/watchpoint control
* rw: 0 = write, 1 = read, 2 = access
*
* Target must be halted while this is invoked as this
* will actually set up breakpoints on target.
*
* The breakpoint hardware will be set up upon adding the first breakpoint.
*
* Upon GDB connection all breakpoints/watchpoints are cleared.
*/
int (*add_breakpoint)(struct target_s *target, breakpoint_t *breakpoint);
/* remove breakpoint. hw will only be updated if the target is currently halted.
* However, this method can be invoked on unresponsive targets.
*/
int (*remove_breakpoint)(struct target_s *target, breakpoint_t *breakpoint);
int (*add_watchpoint)(struct target_s *target, watchpoint_t *watchpoint);
/* remove watchpoint. hw will only be updated if the target is currently halted.
* However, this method can be invoked on unresponsive targets.
*/
int (*remove_watchpoint)(struct target_s *target, watchpoint_t *watchpoint);
/* target algorithm support */
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);
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);
int (*register_commands)(struct command_context_s *cmd_ctx);
/* called when target is created */
int (*target_create)( struct target_s *target, Jim_Interp *interp );
/* called for various config parameters */
/* returns JIM_CONTINUE - if option not understood */
/* otherwise: JIM_OK, or JIM_ERR, */
int (*target_jim_configure)( struct target_s *target, Jim_GetOptInfo *goi );
/* target commands specifically handled by the target */
/* returns JIM_OK, or JIM_ERR, or JIM_CONTINUE - if option not understood */
int (*target_jim_commands)( struct target_s *target, Jim_GetOptInfo *goi );
/* invoked after JTAG chain has been examined & validated. During
* this stage the target is examined and any additional setup is
* performed.
*
* invoked every time after the jtag chain has been validated/examined
*/
int (*examine)(struct target_s *target);
/* Set up structures for target.
*
* It is illegal to talk to the target at this stage as this fn is invoked
* before the JTAG chain has been examined/verified
*/
int (*init_target)(struct command_context_s *cmd_ctx, struct target_s *target);
int (*quit)(void);
int (*virt2phys)(struct target_s *target, u32 address, u32 *physical);
int (*mmu)(struct target_s *target, int *enabled);
} target_type_t;
// forward decloration
typedef struct target_event_action_s target_event_action_t;
typedef struct target_s
{
target_type_t *type; /* target type definition (name, access functions) */
const char *cmd_name; /* tcl Name of target */
int target_number; /* generaly, target index but may not be in order */
jtag_tap_t *tap; /* where on the jtag chain is this */
const char *variant; /* what varient of this chip is it? */
target_event_action_t *event_action;
int reset_halt; /* attempt resetting the CPU into the halted mode? */
u32 working_area; /* working area (initialized RAM). Evaluated
upon first allocation from virtual/physical address. */
u32 working_area_virt; /* virtual address */
u32 working_area_phys; /* physical address */
u32 working_area_size; /* size in bytes */
u32 backup_working_area; /* whether the content of the working area has to be preserved */
struct working_area_s *working_areas;/* list of allocated working areas */
enum target_debug_reason debug_reason;/* reason why the target entered debug state */
enum target_endianess endianness; /* target endianess */
enum target_state state; /* the current backend-state (running, halted, ...) */
struct reg_cache_s *reg_cache; /* the first register cache of the target (core regs) */
struct breakpoint_s *breakpoints; /* list of breakpoints */
struct watchpoint_s *watchpoints; /* list of watchpoints */
struct trace_s *trace_info; /* generic trace information */
struct debug_msg_receiver_s *dbgmsg;/* list of debug message receivers */
u32 dbg_msg_enabled; /* debug message status */
void *arch_info; /* architecture specific information */
struct target_s *next; /* next target in list */
int display; /* display async info in telnet session. Do not display
lots of halted/resumed info when stepping in debugger. */
} target_t;
enum target_event
{
// OLD historical names
// - Prior to the great TCL change
// - June/July/Aug 2008
// - Duane Ellis
TARGET_EVENT_OLD_gdb_program_config,
TARGET_EVENT_OLD_pre_reset,
TARGET_EVENT_OLD_post_reset,
TARGET_EVENT_OLD_pre_resume,
/* allow GDB to do stuff before others handle the halted event,
this is in lieu of defining ordering of invocation of events,
which would be more complicated */
TARGET_EVENT_EARLY_HALTED,
TARGET_EVENT_HALTED, /* target entered debug state from normal execution or reset */
TARGET_EVENT_RESUMED, /* target resumed to normal execution */
TARGET_EVENT_RESUME_START,
TARGET_EVENT_RESUME_END,
TARGET_EVENT_GDB_START, /* debugger started execution (step/run) */
TARGET_EVENT_GDB_END, /* debugger stopped execution (step/run) */
TARGET_EVENT_RESET_START,
TARGET_EVENT_RESET_ASSERT_PRE,
TARGET_EVENT_RESET_ASSERT_POST,
TARGET_EVENT_RESET_DEASSERT_PRE,
TARGET_EVENT_RESET_DEASSERT_POST,
TARGET_EVENT_RESET_HALT_PRE,
TARGET_EVENT_RESET_HALT_POST,
TARGET_EVENT_RESET_WAIT_PRE,
TARGET_EVENT_RESET_WAIT_POST,
TARGET_EVENT_RESET_INIT,
TARGET_EVENT_RESET_END,
TARGET_EVENT_DEBUG_HALTED, /* target entered debug state, but was executing on behalf of the debugger */
TARGET_EVENT_DEBUG_RESUMED, /* target resumed to execute on behalf of the debugger */
TARGET_EVENT_EXAMINE_START,
TARGET_EVENT_EXAMINE_END,
TARGET_EVENT_GDB_ATTACH,
TARGET_EVENT_GDB_DETACH,
TARGET_EVENT_GDB_FLASH_ERASE_START,
TARGET_EVENT_GDB_FLASH_ERASE_END,
TARGET_EVENT_GDB_FLASH_WRITE_START,
TARGET_EVENT_GDB_FLASH_WRITE_END,
};
extern const Jim_Nvp nvp_target_event[];
struct target_event_action_s {
enum target_event event;
Jim_Obj *body;
int has_percent;
target_event_action_t *next;
};
typedef struct target_event_callback_s
{
int (*callback)(struct target_s *target, enum target_event event, void *priv);
void *priv;
struct target_event_callback_s *next;
} target_event_callback_t;
typedef struct target_timer_callback_s
{
int (*callback)(void *priv);
int time_ms;
int periodic;
struct timeval when;
void *priv;
struct target_timer_callback_s *next;
} target_timer_callback_t;
extern int target_register_commands(struct command_context_s *cmd_ctx);
extern int target_register_user_commands(struct command_context_s *cmd_ctx);
extern int target_init(struct command_context_s *cmd_ctx);
extern int target_examine(void);
extern int handle_target(void *priv);
extern int target_process_reset(struct command_context_s *cmd_ctx, enum target_reset_mode reset_mode);
extern int target_register_event_callback(int (*callback)(struct target_s *target, enum target_event event, void *priv), void *priv);
extern int target_unregister_event_callback(int (*callback)(struct target_s *target, enum target_event event, void *priv), void *priv);
extern int target_poll(target_t *target);
extern int target_resume(target_t *target, int current, u32 address, int handle_breakpoints, int debug_execution);
extern int target_halt(target_t *target);
extern int target_call_event_callbacks(target_t *target, enum target_event event);
/* The period is very approximate, the callback can happen much more often
* or much more rarely than specified
*/
extern int target_register_timer_callback(int (*callback)(void *priv), int time_ms, int periodic, void *priv);
extern int target_unregister_timer_callback(int (*callback)(void *priv), void *priv);
extern int target_call_timer_callbacks(void);
/* invoke this to ensure that e.g. polling timer callbacks happen before
* a syncrhonous command completes.
*/
extern int target_call_timer_callbacks_now(void);
extern target_t* get_current_target(struct command_context_s *cmd_ctx);
extern int get_num_by_target(target_t *query_target);
extern target_t* get_target_by_num(int num);
extern int target_write_buffer(struct target_s *target, u32 address, u32 size, u8 *buffer);
extern int target_read_buffer(struct target_s *target, u32 address, u32 size, u8 *buffer);
extern int target_checksum_memory(struct target_s *target, u32 address, u32 size, u32* crc);
extern int target_blank_check_memory(struct target_s *target, u32 address, u32 size, u32* blank);
extern int target_wait_state(target_t *target, enum target_state state, int ms);
/* DANGER!!!!!
*
* if "area" passed in to target_alloc_working_area() points to a memory
* location that goes out of scope (e.g. a pointer on the stack), then
* the caller of target_alloc_working_area() is responsible for invoking
* target_free_working_area() before "area" goes out of scope.
*
* target_free_all_working_areas() will NULL out the "area" pointer
* upon resuming or resetting the CPU.
*
*/
extern int target_alloc_working_area(struct target_s *target, u32 size, working_area_t **area);
extern int target_free_working_area(struct target_s *target, working_area_t *area);
extern int target_free_working_area_restore(struct target_s *target, working_area_t *area, int restore);
extern void target_free_all_working_areas(struct target_s *target);
extern void target_free_all_working_areas_restore(struct target_s *target, int restore);
extern target_t *all_targets;
extern target_event_callback_t *target_event_callbacks;
extern target_timer_callback_t *target_timer_callbacks;
extern u32 target_buffer_get_u32(target_t *target, u8 *buffer);
extern u16 target_buffer_get_u16(target_t *target, u8 *buffer);
extern u8 target_buffer_get_u8 (target_t *target, u8 *buffer);
extern void target_buffer_set_u32(target_t *target, u8 *buffer, u32 value);
extern void target_buffer_set_u16(target_t *target, u8 *buffer, u16 value);
extern void target_buffer_set_u8 (target_t *target, u8 *buffer, u8 value);
int target_read_u32(struct target_s *target, u32 address, u32 *value);
int target_read_u16(struct target_s *target, u32 address, u16 *value);
int target_read_u8(struct target_s *target, u32 address, u8 *value);
int target_write_u32(struct target_s *target, u32 address, u32 value);
int target_write_u16(struct target_s *target, u32 address, u16 value);
int target_write_u8(struct target_s *target, u32 address, u8 value);
/* Issues USER() statements with target state information */
int target_arch_state(struct target_s *target);
void target_handle_event( target_t *t, enum target_event e);
void target_all_handle_event( enum target_event e );
#define ERROR_TARGET_INVALID (-300)
#define ERROR_TARGET_INIT_FAILED (-301)
#define ERROR_TARGET_TIMEOUT (-302)
#define ERROR_TARGET_NOT_HALTED (-304)
#define ERROR_TARGET_FAILURE (-305)
#define ERROR_TARGET_UNALIGNED_ACCESS (-306)
#define ERROR_TARGET_DATA_ABORT (-307)
#define ERROR_TARGET_RESOURCE_NOT_AVAILABLE (-308)
#define ERROR_TARGET_TRANSLATION_FAULT (-309)
#define ERROR_TARGET_NOT_RUNNING (-310)
#define ERROR_TARGET_NOT_EXAMINED (-311)
extern const Jim_Nvp nvp_error_target[];
extern const char *target_strerror_safe( int err );
#endif /* TARGET_H */
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