src/target/target_type.h

   1 /***************************************************************************
   2  *   Copyright (C) 2005 by Dominic Rath                                    *
   3  *   Dominic.Rath@gmx.de                                                   *
   4  *                                                                         *
   5  *   Copyright (C) 2007-2010 Øyvind Harboe                                 *
   6  *   oyvind.harboe@zylin.com                                               *
   7  *                                                                         *
   8  *   Copyright (C) 2008 by Spencer Oliver                                  *
   9  *   spen@spen-soft.co.uk                                                  *
  10  *                                                                         *
  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.                                   *
  15  *                                                                         *
  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.                          *
  20  *                                                                         *
  21  *   You should have received a copy of the GNU General Public License     *
  22  *   along with this program.  If not, see <http://www.gnu.org/licenses/>. *
  23  ***************************************************************************/
  24
  25 #ifndef TARGET_TYPE_H
  26 #define TARGET_TYPE_H
  27
  28 #include <jim-nvp.h>
  29
  30 struct target;
  31
  32 /**
  33  * This holds methods shared between all instances of a given target
  34  * type.  For example, all Cortex-M3 targets on a scan chain share
  35  * the same method table.
  36  */
  37 struct target_type {
  38         /**
  39          * Name of this type of target.  Do @b not access this
  40          * field directly, use target_type_name() instead.
  41          */
  42         const char *name;
  43         const char *deprecated_name;
  44
  45         /* poll current target status */
  46         int (*poll)(struct target *target);
  47         /* Invoked only from target_arch_state().
  48          * Issue USER() w/architecture specific status.  */
  49         int (*arch_state)(struct target *target);
  50
  51         /* target request support */
  52         int (*target_request_data)(struct target *target, uint32_t size, uint8_t *buffer);
  53
  54         /* halt will log a warning, but return ERROR_OK if the target is already halted. */
  55         int (*halt)(struct target *target);
  56         int (*resume)(struct target *target, int current, uint32_t address,
  57                         int handle_breakpoints, int debug_execution);
  58         int (*step)(struct target *target, int current, uint32_t address,
  59                         int handle_breakpoints);
  60
  61         /* target reset control. assert reset can be invoked when OpenOCD and
  62          * the target is out of sync.
  63          *
  64          * A typical example is that the target was power cycled while OpenOCD
  65          * thought the target was halted or running.
  66          *
  67          * assert_reset() can therefore make no assumptions whatsoever about the
  68          * state of the target
  69          *
  70          * Before assert_reset() for the target is invoked, a TRST/tms and
  71          * chain validation is executed. TRST should not be asserted
  72          * during target assert unless there is no way around it due to
  73          * the way reset's are configured.
  74          *
  75          */
  76         int (*assert_reset)(struct target *target);
  77         /**
  78          * The implementation is responsible for polling the
  79          * target such that target->state reflects the
  80          * state correctly.
  81          *
  82          * Otherwise the following would fail, as there will not
  83          * be any "poll" invoked inbetween the "reset run" and
  84          * "halt".
  85          *
  86          * reset run; halt
  87      */
  88         int (*deassert_reset)(struct target *target);
  89         int (*soft_reset_halt)(struct target *target);
  90
  91         /**
  92          * Target register access for GDB.  Do @b not call this function
  93          * directly, use target_get_gdb_reg_list() instead.
  94          *
  95          * Danger! this function will succeed even if the target is running
  96          * and return a register list with dummy values.
  97          *
  98          * The reason is that GDB connection will fail without a valid register
  99          * list, however it is after GDB is connected that monitor commands can
 100          * be run to properly initialize the target
 101          */
 102         int (*get_gdb_reg_list)(struct target *target, struct reg **reg_list[],
 103                         int *reg_list_size, enum target_register_class reg_class);
 104
 105         /* target memory access
 106         * size: 1 = byte (8bit), 2 = half-word (16bit), 4 = word (32bit)
 107         * count: number of items of <size>
 108         */
 109
 110         /**
 111          * Target memory read callback.  Do @b not call this function
 112          * directly, use target_read_memory() instead.
 113          */
 114         int (*read_memory)(struct target *target, uint32_t address,
 115                         uint32_t size, uint32_t count, uint8_t *buffer);
 116         /**
 117          * Target memory write callback.  Do @b not call this function
 118          * directly, use target_write_memory() instead.
 119          */
 120         int (*write_memory)(struct target *target, uint32_t address,
 121                         uint32_t size, uint32_t count, const uint8_t *buffer);
 122
 123         /* Default implementation will do some fancy alignment to improve performance, target can override */
 124         int (*read_buffer)(struct target *target, uint32_t address,
 125                         uint32_t size, uint8_t *buffer);
 126
 127         /* Default implementation will do some fancy alignment to improve performance, target can override */
 128         int (*write_buffer)(struct target *target, uint32_t address,
 129                         uint32_t size, const uint8_t *buffer);
 130
 131         int (*checksum_memory)(struct target *target, uint32_t address,
 132                         uint32_t count, uint32_t *checksum);
 133         int (*blank_check_memory)(struct target *target, uint32_t address,
 134                         uint32_t count, uint32_t *blank);
 135
 136         /*
 137          * target break-/watchpoint control
 138          * rw: 0 = write, 1 = read, 2 = access
 139          *
 140          * Target must be halted while this is invoked as this
 141          * will actually set up breakpoints on target.
 142          *
 143          * The breakpoint hardware will be set up upon adding the
 144          * first breakpoint.
 145          *
 146          * Upon GDB connection all breakpoints/watchpoints are cleared.
 147          */
 148         int (*add_breakpoint)(struct target *target, struct breakpoint *breakpoint);
 149         int (*add_context_breakpoint)(struct target *target, struct breakpoint *breakpoint);
 150         int (*add_hybrid_breakpoint)(struct target *target, struct breakpoint *breakpoint);
 151
 152         /* remove breakpoint. hw will only be updated if the target
 153          * is currently halted.
 154          * However, this method can be invoked on unresponsive targets.
 155          */
 156         int (*remove_breakpoint)(struct target *target, struct breakpoint *breakpoint);
 157
 158         /* add watchpoint ... see add_breakpoint() comment above. */
 159         int (*add_watchpoint)(struct target *target, struct watchpoint *watchpoint);
 160
 161         /* remove watchpoint. hw will only be updated if the target
 162          * is currently halted.
 163          * However, this method can be invoked on unresponsive targets.
 164          */
 165         int (*remove_watchpoint)(struct target *target, struct watchpoint *watchpoint);
 166
 167         /* Find out just hit watchpoint. After the target hits a watchpoint, the
 168          * information could assist gdb to locate where the modified/accessed memory is.
 169          */
 170         int (*hit_watchpoint)(struct target *target, struct watchpoint **hit_watchpoint);
 171
 172         /**
 173          * Target algorithm support.  Do @b not call this method directly,
 174          * use target_run_algorithm() instead.
 175          */
 176         int (*run_algorithm)(struct target *target, int num_mem_params,
 177                         struct mem_param *mem_params, int num_reg_params,
 178                         struct reg_param *reg_param, uint32_t entry_point,
 179                         uint32_t exit_point, int timeout_ms, void *arch_info);
 180         int (*start_algorithm)(struct target *target, int num_mem_params,
 181                         struct mem_param *mem_params, int num_reg_params,
 182                         struct reg_param *reg_param, uint32_t entry_point,
 183                         uint32_t exit_point, void *arch_info);
 184         int (*wait_algorithm)(struct target *target, int num_mem_params,
 185                         struct mem_param *mem_params, int num_reg_params,
 186                         struct reg_param *reg_param, uint32_t exit_point,
 187                         int timeout_ms, void *arch_info);
 188
 189         const struct command_registration *commands;
 190
 191         /* called when target is created */
 192         int (*target_create)(struct target *target, Jim_Interp *interp);
 193
 194         /* called for various config parameters */
 195         /* returns JIM_CONTINUE - if option not understood */
 196         /* otherwise: JIM_OK, or JIM_ERR, */
 197         int (*target_jim_configure)(struct target *target, Jim_GetOptInfo *goi);
 198
 199         /* target commands specifically handled by the target */
 200         /* returns JIM_OK, or JIM_ERR, or JIM_CONTINUE - if option not understood */
 201         int (*target_jim_commands)(struct target *target, Jim_GetOptInfo *goi);
 202
 203         /**
 204          * This method is used to perform target setup that requires
 205          * JTAG access.
 206          *
 207          * This may be called multiple times.  It is called after the
 208          * scan chain is initially validated, or later after the target
 209          * is enabled by a JRC.  It may also be called during some
 210          * parts of the reset sequence.
 211          *
 212          * For one-time initialization tasks, use target_was_examined()
 213          * and target_set_examined().  For example, probe the hardware
 214          * before setting up chip-specific state, and then set that
 215          * flag so you don't do that again.
 216          */
 217         int (*examine)(struct target *target);
 218
 219         /* Set up structures for target.
 220          *
 221          * It is illegal to talk to the target at this stage as this fn is invoked
 222          * before the JTAG chain has been examined/verified
 223          * */
 224         int (*init_target)(struct command_context *cmd_ctx, struct target *target);
 225
 226         /**
 227          * Free all the resources allocated by the target.
 228          *
 229          * @param target The target to deinit
 230          */
 231         void (*deinit_target)(struct target *target);
 232
 233         /* translate from virtual to physical address. Default implementation is successful
 234          * no-op(i.e. virtual==physical).
 235          */
 236         int (*virt2phys)(struct target *target, uint32_t address, uint32_t *physical);
 237
 238         /* read directly from physical memory. caches are bypassed and untouched.
 239          *
 240          * If the target does not support disabling caches, leaving them untouched,
 241          * then minimally the actual physical memory location will be read even
 242          * if cache states are unchanged, flushed, etc.
 243          *
 244          * Default implementation is to call read_memory.
 245          */
 246         int (*read_phys_memory)(struct target *target, uint32_t phys_address,
 247                         uint32_t size, uint32_t count, uint8_t *buffer);
 248
 249         /*
 250          * same as read_phys_memory, except that it writes...
 251          */
 252         int (*write_phys_memory)(struct target *target, uint32_t phys_address,
 253                         uint32_t size, uint32_t count, const uint8_t *buffer);
 254
 255         int (*mmu)(struct target *target, int *enabled);
 256
 257         /* after reset is complete, the target can check if things are properly set up.
 258          *
 259          * This can be used to check if e.g. DCC memory writes have been enabled for
 260          * arm7/9 targets, which they really should except in the most contrived
 261          * circumstances.
 262          */
 263         int (*check_reset)(struct target *target);
 264
 265         /* get GDB file-I/O parameters from target
 266          */
 267         int (*get_gdb_fileio_info)(struct target *target, struct gdb_fileio_info *fileio_info);
 268
 269         /* pass GDB file-I/O response to target
 270          */
 271         int (*gdb_fileio_end)(struct target *target, int retcode, int fileio_errno, bool ctrl_c);
 272
 273         /* do target profiling
 274          */
 275         int (*profiling)(struct target *target, uint32_t *samples,
 276                         uint32_t max_num_samples, uint32_t *num_samples, uint32_t seconds);
 277 };
 278
 279 #endif /* TARGET_TYPE_H */