* Copyright (C) 2005 by Dominic Rath *
* Dominic.Rath@gmx.de *
* *
- * Copyright (C) 2007,2008 Øyvind Harboe *
+ * Copyright (C) 2007,2008,2009 Øyvind Harboe *
* oyvind.harboe@zylin.com *
* *
* Copyright (C) 2008 by Spencer Oliver *
* 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) */
+ * behalf of the debugger (e.g. algorithm for flashing)
+ *
+ * also see: target_state_name();
+ */
+
enum target_state
{
enum target_endianess
{
- TARGET_ENDIAN_UNKNOWN=0,
+ TARGET_ENDIAN_UNKNOWN = 0,
TARGET_BIG_ENDIAN = 1, TARGET_LITTLE_ENDIAN = 2
};
{
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 */
+ int target_number; /* DO NOT USE! field to be removed in 2010 */
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;
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 */
+ // also see: target_state_name()
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 */
int display; /* display async info in telnet session. Do not display
* lots of halted/resumed info when stepping in debugger. */
+ bool halt_issued; /* did we transition to halted state? */
+ long long halt_issued_time; /* Note time when halt was issued */
} target_t;
enum target_event
/* 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,
+ * which would be more complicated
+ *
+ * Telling GDB to halt does not mean that the target stopped running,
+ * simply that we're dropping out of GDB's waiting for step or continue.
+ *
+ * This can be useful when e.g. detecting power dropout.
+ */
+ TARGET_EVENT_GDB_HALT,
TARGET_EVENT_HALTED, /* target entered debug state from normal execution or reset */
TARGET_EVENT_RESUMED, /* target resumed to normal execution */
TARGET_EVENT_RESUME_START,
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(const char *id);
/**
extern int target_bulk_write_memory(struct target_s *target,
uint32_t address, uint32_t count, uint8_t *buffer);
+/*
+ * Write to target memory using the virtual address.
+ *
+ * Note that this fn is used to implement software breakpoints. Targets
+ * can implement support for software breakpoints to memory marked as read
+ * only by making this fn write to ram even if it is read only(MMU or
+ * MPUs).
+ *
+ * It is sufficient to implement for writing a single word(16 or 32 in
+ * ARM32/16 bit case) to write the breakpoint to ram.
+ *
+ * The target should also take care of "other things" to make sure that
+ * software breakpoints can be written using this function. E.g.
+ * when there is a separate instruction and data cache, this fn must
+ * make sure that the instruction cache is synced up to the potential
+ * code change that can happen as a result of the memory write(typically
+ * by invalidating the cache).
+ *
+ * The high level wrapper fn in target.c will break down this memory write
+ * request to multiple write requests to the target driver to e.g. guarantee
+ * that writing 4 bytes to an aligned address happens with a single 32 bit
+ * write operation, thus making this fn suitable to e.g. write to special
+ * peripheral registers which do not support byte operations.
+ */
extern int target_write_buffer(struct target_s *target, uint32_t address, uint32_t size, uint8_t *buffer);
extern int target_read_buffer(struct target_s *target, uint32_t address, uint32_t size, uint8_t *buffer);
extern int target_checksum_memory(struct target_s *target, uint32_t address, uint32_t size, uint32_t* crc);
extern int target_blank_check_memory(struct target_s *target, uint32_t address, uint32_t size, uint32_t* blank);
extern int target_wait_state(target_t *target, enum target_state state, int ms);
+/** Return the *name* of this targets current state */
+const char *target_state_name( target_t *target );
+
/* DANGER!!!!!
*
* if "area" passed in to target_alloc_working_area() points to a memory
/* 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 );
+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_NOT_EXAMINED (-311)
extern const Jim_Nvp nvp_error_target[];
-extern const char *target_strerror_safe( int err );
+extern const char *target_strerror_safe(int err);
#endif /* TARGET_H */
projects / fw / openocd / blobdiff