src/target/target.h

   1 /***************************************************************************
   2  *   Copyright (C) 2005 by Dominic Rath                                    *
   3  *   Dominic.Rath@gmx.de                                                   *
   4  *                                                                         *
   5  *   This program is free software; you can redistribute it and/or modify  *
   6  *   it under the terms of the GNU General Public License as published by  *
   7  *   the Free Software Foundation; either version 2 of the License, or     *
   8  *   (at your option) any later version.                                   *
   9  *                                                                         *
  10  *   This program is distributed in the hope that it will be useful,       *
  11  *   but WITHOUT ANY WARRANTY; without even the implied warranty of        *
  12  *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the         *
  13  *   GNU General Public License for more details.                          *
  14  *                                                                         *
  15  *   You should have received a copy of the GNU General Public License     *
  16  *   along with this program; if not, write to the                         *
  17  *   Free Software Foundation, Inc.,                                       *
  18  *   59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.             *
  19  ***************************************************************************/
  20 #ifndef TARGET_H
  21 #define TARGET_H
  22
  23 #include "register.h"
  24 #include "breakpoints.h"
  25 #include "algorithm.h"
  26
  27 #include "command.h"
  28 #include "types.h"
  29
  30 #include <sys/time.h>
  31 #include <time.h>
  32
  33 struct reg_s;
  34 struct command_context_s;
  35
  36 enum target_state
  37 {
  38         TARGET_UNKNOWN = 0,
  39         TARGET_RUNNING = 1,
  40         TARGET_HALTED = 2,
  41         TARGET_RESET = 3,
  42         TARGET_DEBUG_RUNNING = 4,
  43 };
  44
  45 extern char *target_state_strings[];
  46
  47 enum daemon_startup_mode
  48 {
  49         DAEMON_ATTACH,          /* simply attach to the target */
  50         DAEMON_RESET,           /* reset target (behaviour defined by reset_mode */
  51 };
  52
  53 extern enum daemon_startup_mode startup_mode;
  54
  55 enum target_reset_mode
  56 {
  57         RESET_RUN = 0,          /* reset and let target run */
  58         RESET_HALT = 1,         /* reset and halt target out of reset */
  59         RESET_INIT = 2,         /* reset and halt target out of reset, then run init script */
  60         RESET_RUN_AND_HALT = 3, /* reset and let target run, halt after n milliseconds */
  61         RESET_RUN_AND_INIT = 4, /* reset and let target run, halt after n milliseconds, then run init script */
  62 };
  63
  64 enum target_debug_reason
  65 {
  66         DBG_REASON_DBGRQ = 0,
  67         DBG_REASON_BREAKPOINT = 1,
  68         DBG_REASON_WATCHPOINT = 2,
  69         DBG_REASON_WPTANDBKPT = 3,
  70         DBG_REASON_SINGLESTEP = 4,
  71         DBG_REASON_NOTHALTED = 5
  72 };
  73
  74 extern char *target_debug_reason_strings[];
  75
  76 enum target_endianess
  77 {
  78         TARGET_BIG_ENDIAN = 0, TARGET_LITTLE_ENDIAN = 1
  79 };
  80
  81 extern char *target_endianess_strings[];
  82
  83 struct target_s;
  84
  85 typedef struct working_area_s
  86 {
  87         u32 address;
  88         u32 size;
  89         int free;
  90         u8 *backup;
  91         struct working_area_s **user;
  92         struct working_area_s *next;
  93 } working_area_t;
  94
  95 typedef struct target_type_s
  96 {
  97         char *name;
  98
  99         /* poll current target status */
 100         enum target_state (*poll)(struct target_s *target);
 101         /* architecture specific status reply */
 102         int (*arch_state)(struct target_s *target, char *buf, int buf_size);
 103
 104         /* target execution control */
 105         int (*halt)(struct target_s *target);
 106         int (*resume)(struct target_s *target, int current, u32 address, int handle_breakpoints, int debug_execution);
 107         int (*step)(struct target_s *target, int current, u32 address, int handle_breakpoints);
 108
 109         /* target reset control */
 110         int (*assert_reset)(struct target_s *target);
 111         int (*deassert_reset)(struct target_s *target);
 112         int (*soft_reset_halt)(struct target_s *target);
 113
 114         /* target register access for gdb */
 115         int (*get_gdb_reg_list)(struct target_s *target, struct reg_s **reg_list[], int *reg_list_size);
 116
 117         /* target memory access
 118         * size: 1 = byte (8bit), 2 = half-word (16bit), 4 = word (32bit)
 119         * count: number of items of <size>
 120         */
 121         int (*read_memory)(struct target_s *target, u32 address, u32 size, u32 count, u8 *buffer);
 122         int (*write_memory)(struct target_s *target, u32 address, u32 size, u32 count, u8 *buffer);
 123
 124         /* write target memory in multiples of 4 byte, optimized for writing large quantities of data */
 125         int (*bulk_write_memory)(struct target_s *target, u32 address, u32 count, u8 *buffer);
 126
 127         /* target break-/watchpoint control
 128         * rw: 0 = write, 1 = read, 2 = access
 129         */
 130         int (*add_breakpoint)(struct target_s *target, breakpoint_t *breakpoint);
 131         int (*remove_breakpoint)(struct target_s *target, breakpoint_t *breakpoint);
 132         int (*add_watchpoint)(struct target_s *target, watchpoint_t *watchpoint);
 133         int (*remove_watchpoint)(struct target_s *target, watchpoint_t *watchpoint);
 134
 135         /* target algorithm support */
 136         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);
 137
 138         int (*register_commands)(struct command_context_s *cmd_ctx);
 139         int (*target_command)(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc, struct target_s *target);
 140         int (*init_target)(struct command_context_s *cmd_ctx, struct target_s *target);
 141         int (*quit)(void);
 142
 143 } target_type_t;
 144
 145 typedef struct target_s
 146 {
 147         target_type_t *type;                            /* target type definition (name, access functions) */
 148         enum target_reset_mode reset_mode;      /* what to do after a reset */
 149         int run_and_halt_time;                          /* how long the target should run after a run_and_halt reset */
 150         char *reset_script;                                     /* script file to initialize the target after a reset */
 151         char *post_halt_script;                         /* script file to execute after the target halted */
 152         char *pre_resume_script;                        /* script file to execute before the target resumed */
 153         u32 working_area;                                       /* working area (initialized RAM) */
 154         u32 working_area_size;                          /* size in bytes */
 155         u32 backup_working_area;                        /* whether the content of the working area has to be preserved */
 156         struct working_area_s *working_areas;/* list of allocated working areas */
 157         enum target_debug_reason debug_reason; /* reason why the target entered debug state */
 158         enum target_endianess endianness;       /* target endianess */
 159         enum target_state state;                        /* the current backend-state (running, halted, ...) */
 160         struct reg_cache_s *reg_cache;          /* the first register cache of the target (core regs) */
 161         struct breakpoint_s *breakpoints;       /* list of breakpoints */
 162         struct watchpoint_s *watchpoints;       /* list of watchpoints */
 163         void *arch_info;                                        /* architecture specific information */
 164         struct target_s *next;                          /* next target in list */
 165 } target_t;
 166
 167 enum target_event
 168 {
 169         TARGET_EVENT_HALTED,            /* target entered debug state from normal execution or reset */
 170         TARGET_EVENT_RESUMED,           /* target resumed to normal execution */
 171         TARGET_EVENT_RESET,                     /* target entered reset */
 172         TARGET_EVENT_DEBUG_HALTED,      /* target entered debug state, but was executing on behalf of the debugger */
 173         TARGET_EVENT_DEBUG_RESUMED, /* target resumed to execute on behalf of the debugger */
 174 };
 175
 176 typedef struct target_event_callback_s
 177 {
 178         int (*callback)(struct target_s *target, enum target_event event, void *priv);
 179         void *priv;
 180         struct target_event_callback_s *next;
 181 } target_event_callback_t;
 182
 183 typedef struct target_timer_callback_s
 184 {
 185         int (*callback)(void *priv);
 186         int time_ms;
 187         int periodic;
 188         struct timeval when;
 189         void *priv;
 190         struct target_timer_callback_s *next;
 191 } target_timer_callback_t;
 192
 193 extern int target_register_commands(struct command_context_s *cmd_ctx);
 194 extern int target_register_user_commands(struct command_context_s *cmd_ctx);
 195 extern int target_init(struct command_context_s *cmd_ctx);
 196 extern int handle_target(void *priv);
 197
 198 extern int target_register_event_callback(int (*callback)(struct target_s *target, enum target_event event, void *priv), void *priv);
 199 extern int target_unregister_event_callback(int (*callback)(struct target_s *target, enum target_event event, void *priv), void *priv);
 200 extern int target_call_event_callbacks(target_t *target, enum target_event event);
 201
 202 extern int target_register_timer_callback(int (*callback)(void *priv), int time_ms, int periodic, void *priv);
 203 extern int target_unregister_timer_callback(int (*callback)(void *priv), void *priv);
 204 extern int target_call_timer_callbacks();
 205
 206 extern target_t* get_current_target(struct command_context_s *cmd_ctx);
 207 extern int get_num_by_target(target_t *query_target);
 208 extern target_t* get_target_by_num(int num);
 209
 210 extern int target_write_buffer(struct target_s *target, u32 address, u32 size, u8 *buffer);
 211 extern int target_read_buffer(struct target_s *target, u32 address, u32 size, u8 *buffer);
 212
 213 extern int target_alloc_working_area(struct target_s *target, u32 size, working_area_t **area);
 214 extern int target_free_working_area(struct target_s *target, working_area_t *area);
 215 extern int target_free_all_working_areas(struct target_s *target);
 216
 217 extern target_t *targets;
 218
 219 extern target_event_callback_t *target_event_callbacks;
 220 extern target_timer_callback_t *target_timer_callbacks;
 221
 222 extern u32 target_buffer_get_u32(target_t *target, u8 *buffer);
 223 extern u16 target_buffer_get_u16(target_t *target, u8 *buffer);
 224 extern void target_buffer_set_u32(target_t *target, u8 *buffer, u32 value);
 225 extern void target_buffer_set_u16(target_t *target, u8 *buffer, u16 value);
 226
 227 int target_read_u32(struct target_s *target, u32 address, u32 *value);
 228 int target_read_u16(struct target_s *target, u32 address, u16 *value);
 229 int target_read_u8(struct target_s *target, u32 address, u8 *value);
 230 int target_write_u32(struct target_s *target, u32 address, u32 value);
 231 int target_write_u16(struct target_s *target, u32 address, u16 value);
 232 int target_write_u8(struct target_s *target, u32 address, u8 value);
 233
 234 #define ERROR_TARGET_INVALID    (-300)
 235 #define ERROR_TARGET_INIT_FAILED (-301)
 236 #define ERROR_TARGET_TIMEOUT    (-302)
 237 #define ERROR_TARGET_ALREADY_HALTED (-303)
 238 #define ERROR_TARGET_NOT_HALTED (-304)
 239 #define ERROR_TARGET_FAILURE    (-305)
 240 #define ERROR_TARGET_UNALIGNED_ACCESS   (-306)
 241 #define ERROR_TARGET_DATA_ABORT (-307)
 242 #define ERROR_TARGET_RESOURCE_NOT_AVAILABLE     (-308)
 243 #define ERROR_TARGET_TRANSLATION_FAULT  (-309)
 244
 245 #endif /* TARGET_H */