- remove target specific variant and use target->variant member
[openocd.git] / src / target / target.c
index ca34a4d067ba8c0afc20d092badac0b0522f9fbb..c86ee8d4f07fd7ec13043fe26deb8d4a09bdd9fd 100644 (file)
@@ -11,6 +11,9 @@
  *   Copyright (C) 2008 by Spencer Oliver                                  *
  *   spen@spen-soft.co.uk                                                  *
  *                                                                         *
+ *   Copyright (C) 2008 by Rick Altherr                                    *
+ *   kc8apf@kc8apf.net>                                                    *
+ *                                                                         *
  *   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     *
 #include <fileio.h>
 #include <image.h>
 
-static int USE_OLD_RESET = 0; // temp
-
 int cli_target_callback_event_handler(struct target_s *target, enum target_event event, void *priv);
 
-
 int handle_targets_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc);
 
-int handle_working_area_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc);
-
 int handle_reg_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc);
 int handle_poll_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc);
 int handle_halt_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc);
 int handle_wait_halt_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc);
-int handle_NEWreset_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc);
 int handle_reset_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc);
 int handle_soft_reset_halt_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc);
 int handle_resume_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc);
@@ -92,8 +89,6 @@ static int jim_target( Jim_Interp *interp, int argc, Jim_Obj *const *argv);
 static int target_array2mem(Jim_Interp *interp, target_t *target, int argc, Jim_Obj *const *argv);
 static int target_mem2array(Jim_Interp *interp, target_t *target, int argc, Jim_Obj *const *argv);
 
-
-
 /* targets */
 extern target_type_t arm7tdmi_target;
 extern target_type_t arm720t_target;
@@ -165,18 +160,18 @@ const char *target_strerror_safe( int err )
 }
 
 const Jim_Nvp nvp_target_event[] = {
-       { .value = TARGET_EVENT_OLD_pre_reset          , .name = "old-pre_reset" },
        { .value = TARGET_EVENT_OLD_gdb_program_config , .name = "old-gdb_program_config" },
-       { .value = TARGET_EVENT_OLD_post_reset         , .name = "old-post_reset" },
        { .value = TARGET_EVENT_OLD_pre_resume         , .name = "old-pre_resume" },
 
-
        { .value = TARGET_EVENT_EARLY_HALTED, .name = "early-halted" },
        { .value = TARGET_EVENT_HALTED, .name = "halted" },
        { .value = TARGET_EVENT_RESUMED, .name = "resumed" },
        { .value = TARGET_EVENT_RESUME_START, .name = "resume-start" },
        { .value = TARGET_EVENT_RESUME_END, .name = "resume-end" },
 
+       { .name = "gdb-start", .value = TARGET_EVENT_GDB_START },
+       { .name = "gdb-end", .value = TARGET_EVENT_GDB_END },
+
        /* historical name */
 
        { .value = TARGET_EVENT_RESET_START, .name = "reset-start" },
@@ -192,13 +187,8 @@ const Jim_Nvp nvp_target_event[] = {
        { .value = TARGET_EVENT_RESET_INIT , .name = "reset-init" },
        { .value = TARGET_EVENT_RESET_END, .name = "reset-end" },
 
-
-
-
-
        { .value = TARGET_EVENT_EXAMINE_START, .name = "examine-start" },
-       { .value = TARGET_EVENT_EXAMINE_START, .name = "examine-end" },
-
+       { .value = TARGET_EVENT_EXAMINE_END, .name = "examine-end" },
 
        { .value = TARGET_EVENT_DEBUG_HALTED, .name = "debug-halted" },
        { .value = TARGET_EVENT_DEBUG_RESUMED, .name = "debug-resumed" },
@@ -206,7 +196,6 @@ const Jim_Nvp nvp_target_event[] = {
        { .value = TARGET_EVENT_GDB_ATTACH, .name = "gdb-attach" },
        { .value = TARGET_EVENT_GDB_DETACH, .name = "gdb-detach" },
 
-
        { .value = TARGET_EVENT_GDB_FLASH_WRITE_START, .name = "gdb-flash-write-start" },
        { .value = TARGET_EVENT_GDB_FLASH_WRITE_END  , .name = "gdb-flash-write-end"   },
 
@@ -229,7 +218,6 @@ const Jim_Nvp nvp_target_state[] = {
        { .name = NULL, .value = -1 },
 };
 
-
 const Jim_Nvp nvp_target_debug_reason [] = {
        { .name = "debug-request"            , .value = DBG_REASON_DBGRQ },
        { .name = "breakpoint"               , .value = DBG_REASON_BREAKPOINT },
@@ -246,7 +234,7 @@ const Jim_Nvp nvp_target_endian[] = {
        { .name = "big",    .value = TARGET_BIG_ENDIAN },
        { .name = "little", .value = TARGET_LITTLE_ENDIAN },
        { .name = "be",     .value = TARGET_BIG_ENDIAN },
-        { .name = "le",     .value = TARGET_LITTLE_ENDIAN },
+       { .name = "le",     .value = TARGET_LITTLE_ENDIAN },
        { .name = NULL,     .value = -1 },
 };
 
@@ -377,7 +365,6 @@ target_t* get_current_target(command_context_t *cmd_ctx)
        return target;
 }
 
-
 int target_poll(struct target_s *target)
 {
        /* We can't poll until after examine */
@@ -421,8 +408,7 @@ int target_resume(struct target_s *target, int current, u32 address, int handle_
        return retval;
 }
 
-
-static int NEW_target_process_reset(struct command_context_s *cmd_ctx, enum target_reset_mode reset_mode)
+int target_process_reset(struct command_context_s *cmd_ctx, enum target_reset_mode reset_mode)
 {
        char buf[100];
        int retval;
@@ -447,114 +433,6 @@ static int NEW_target_process_reset(struct command_context_s *cmd_ctx, enum targ
        return retval;
 }
 
-// Next patch - this turns into TCL...
-static int OLD_target_process_reset(struct command_context_s *cmd_ctx, enum target_reset_mode reset_mode)
-{
-       int retval = ERROR_OK;
-       target_t *target;
-
-       target = all_targets;
-
-       target_all_handle_event( TARGET_EVENT_OLD_pre_reset );
-
-       if ((retval = jtag_init_reset(cmd_ctx)) != ERROR_OK)
-               return retval;
-
-       keep_alive(); /* we might be running on a very slow JTAG clk */
-
-       /* First time this is executed after launching OpenOCD, it will read out
-        * the type of CPU, etc. and init Embedded ICE registers in host
-        * memory.
-        *
-        * It will also set up ICE registers in the target.
-        *
-        * However, if we assert TRST later, we need to set up the registers again.
-        *
-        * For the "reset halt/init" case we must only set up the registers here.
-        */
-       if ((retval = target_examine()) != ERROR_OK)
-               return retval;
-
-       keep_alive(); /* we might be running on a very slow JTAG clk */
-
-       target = all_targets;
-       while (target)
-       {
-               /* we have no idea what state the target is in, so we
-                * have to drop working areas
-                */
-               target_free_all_working_areas_restore(target, 0);
-               target->reset_halt=((reset_mode==RESET_HALT)||(reset_mode==RESET_INIT));
-               if ((retval = target->type->assert_reset(target))!=ERROR_OK)
-                       return retval;
-               target = target->next;
-       }
-
-       target = all_targets;
-       while (target)
-       {
-               if ((retval = target->type->deassert_reset(target))!=ERROR_OK)
-                       return retval;
-               target = target->next;
-       }
-
-       target = all_targets;
-       while (target)
-       {
-               /* We can fail to bring the target into the halted state, try after reset has been deasserted  */
-               if (target->reset_halt)
-               {
-                       /* wait up to 1 second for halt. */
-                       if ((retval = target_wait_state(target, TARGET_HALTED, 1000)) != ERROR_OK)
-                               return retval;
-                       if (target->state != TARGET_HALTED)
-                       {
-                               LOG_WARNING("Failed to reset target into halted mode - issuing halt");
-                               if ((retval = target->type->halt(target))!=ERROR_OK)
-                                       return retval;
-                       }
-               }
-
-               target = target->next;
-       }
-
-
-       LOG_DEBUG("Waiting for halted stated as appropriate");
-
-       if ((reset_mode == RESET_HALT) || (reset_mode == RESET_INIT))
-       {
-               target = all_targets;
-               while (target)
-               {
-                       /* Wait for reset to complete, maximum 5 seconds. */
-                       if (((retval=target_wait_state(target, TARGET_HALTED, 5000)))==ERROR_OK)
-                       {
-                               if (reset_mode == RESET_INIT){
-                                       target_handle_event( target, TARGET_EVENT_OLD_post_reset );
-                               }
-
-                       }
-                       target = target->next;
-               }
-       }
-
-       /* We want any events to be processed before the prompt */
-       if ((retval = target_call_timer_callbacks_now()) != ERROR_OK)
-               return retval;
-
-       return retval;
-}
-
-int target_process_reset(struct command_context_s *cmd_ctx, enum target_reset_mode reset_mode)
-{
-       if( USE_OLD_RESET ){
-               return OLD_target_process_reset( cmd_ctx, reset_mode );
-       } else {
-               return NEW_target_process_reset( cmd_ctx, reset_mode );
-       }
-}
-
-
 static int default_virt2phys(struct target_s *target, u32 virtual, u32 *physical)
 {
        *physical = virtual;
@@ -573,7 +451,6 @@ static int default_examine(struct target_s *target)
        return ERROR_OK;
 }
 
-
 /* Targets that correctly implement init+examine, i.e.
  * no communication with target during init:
  *
@@ -645,10 +522,10 @@ int target_init(struct command_context_s *cmd_ctx)
                        target->type->examine = default_examine;
                }
 
-               if (target->type->init_target(cmd_ctx, target) != ERROR_OK)
+               if ((retval = target->type->init_target(cmd_ctx, target)) != ERROR_OK)
                {
                        LOG_ERROR("target '%s' init failed", target->type->name);
-                       exit(-1);
+                       return retval;
                }
 
                /* Set up default functions if none are provided by target */
@@ -669,7 +546,6 @@ int target_init(struct command_context_s *cmd_ctx)
                target->type->run_algorithm_imp = target->type->run_algorithm;
                target->type->run_algorithm = target_run_algorithm_imp;
 
-
                if (target->type->mmu == NULL)
                {
                        target->type->mmu = default_mmu;
@@ -815,7 +691,6 @@ int target_call_event_callbacks(target_t *target, enum target_event event)
                target_call_event_callbacks(target, TARGET_EVENT_EARLY_HALTED);
        }
 
-
        LOG_DEBUG("target event %i (%s)",
                          event,
                          Jim_Nvp_value2name_simple( nvp_target_event, event )->name );
@@ -1050,10 +925,9 @@ void target_free_all_working_areas(struct target_s *target)
 int target_register_commands(struct command_context_s *cmd_ctx)
 {
 
-       register_command(cmd_ctx, NULL, "targets", handle_targets_command, COMMAND_EXEC, NULL);
-       register_command(cmd_ctx, NULL, "working_area", handle_working_area_command, COMMAND_ANY, "working_area <target#> <address> <size> <'backup'|'nobackup'> [virtual address]");
-       register_command(cmd_ctx, NULL, "virt2phys", handle_virt2phys_command, COMMAND_ANY, "virt2phys <virtual address>");
-       register_command(cmd_ctx, NULL, "profile", handle_profile_command, COMMAND_EXEC, "PRELIMINARY! - profile <seconds> <gmon.out>");
+       register_command(cmd_ctx, NULL, "targets", handle_targets_command, COMMAND_EXEC, "change the current command line target (one parameter) or lists targets (with no parameter)");
+       register_command(cmd_ctx, NULL, "virt2phys", handle_virt2phys_command, COMMAND_ANY, "translate a virtual address into a physical address");
+       register_command(cmd_ctx, NULL, "profile", handle_profile_command, COMMAND_EXEC, "profiling samples the CPU PC");
 
        register_jim(cmd_ctx, "target", jim_target, "configure target" );
 
@@ -1158,7 +1032,6 @@ int target_write_buffer(struct target_s *target, u32 address, u32 size, u8 *buff
        return ERROR_OK;
 }
 
-
 /* Single aligned words are guaranteed to use 16 or 32 bit access
  * mode respectively, otherwise data is handled as quickly as
  * possible
@@ -1412,7 +1285,7 @@ int target_write_u8(struct target_s *target, u32 address, u8 value)
 
        LOG_DEBUG("address: 0x%8.8x, value: 0x%2.2x", address, value);
 
-       if ((retval = target->type->read_memory(target, address, 1, 1, &value)) != ERROR_OK)
+       if ((retval = target->type->write_memory(target, address, 1, 1, &value)) != ERROR_OK)
        {
                LOG_DEBUG("failed: %i", retval);
        }
@@ -1423,14 +1296,13 @@ int target_write_u8(struct target_s *target, u32 address, u8 value)
 int target_register_user_commands(struct command_context_s *cmd_ctx)
 {
        int retval = ERROR_OK;
-       register_command(cmd_ctx,  NULL, "reg", handle_reg_command, COMMAND_EXEC, NULL);
+       register_command(cmd_ctx,  NULL, "reg", handle_reg_command, COMMAND_EXEC, "display or set a register");
        register_command(cmd_ctx,  NULL, "poll", handle_poll_command, COMMAND_EXEC, "poll target state");
        register_command(cmd_ctx,  NULL, "wait_halt", handle_wait_halt_command, COMMAND_EXEC, "wait for target halt [time (s)]");
        register_command(cmd_ctx,  NULL, "halt", handle_halt_command, COMMAND_EXEC, "halt target");
        register_command(cmd_ctx,  NULL, "resume", handle_resume_command, COMMAND_EXEC, "resume target [addr]");
        register_command(cmd_ctx,  NULL, "step", handle_step_command, COMMAND_EXEC, "step one instruction from current PC or [addr]");
-       register_command(cmd_ctx,  NULL, "NEWreset", handle_NEWreset_command, COMMAND_EXEC, "reset target [run|halt|init] - default is run");
-       register_command(cmd_ctx,  NULL, "reset", handle_reset_command, COMMAND_EXEC, "OLDreset target [run|halt|init] - default is run");
+       register_command(cmd_ctx,  NULL, "reset", handle_reset_command, COMMAND_EXEC, "reset target [run|halt|init] - default is run");
        register_command(cmd_ctx,  NULL, "soft_reset_halt", handle_soft_reset_halt_command, COMMAND_EXEC, "halt the target and do a soft reset");
 
        register_command(cmd_ctx,  NULL, "mdw", handle_md_command, COMMAND_EXEC, "display memory words <addr> [count]");
@@ -1455,7 +1327,6 @@ int target_register_user_commands(struct command_context_s *cmd_ctx)
        if((retval = trace_register_commands(cmd_ctx)) != ERROR_OK)
                return retval;
 
-
        return retval;
 }
 
@@ -1467,7 +1338,7 @@ int handle_targets_command(struct command_context_s *cmd_ctx, char *cmd, char **
        if (argc == 1)
        {
                /* try as tcltarget name */
-               for( target = all_targets ; target ; target++ ){
+               for( target = all_targets ; target ; target = target->next ){
                  if( target->cmd_name ){
                        if( 0 == strcmp( args[0], target->cmd_name ) ){
                                /* MATCH */
@@ -1493,19 +1364,21 @@ int handle_targets_command(struct command_context_s *cmd_ctx, char *cmd, char **
                cmd_ctx->current_target = target->target_number;
                return ERROR_OK;
        }
- DumpTargets:
+DumpTargets:
 
-       command_print(cmd_ctx, "    CmdName    Type       Endian     ChainPos State     ");
-       command_print(cmd_ctx, "--  ---------- ---------- ---------- -------- ----------");
+       target = all_targets;
+       command_print(cmd_ctx, "    CmdName    Type       Endian     AbsChainPos Name          State     ");
+       command_print(cmd_ctx, "--  ---------- ---------- ---------- ----------- ------------- ----------");
        while (target)
        {
                /* XX: abcdefghij abcdefghij abcdefghij abcdefghij */
-               command_print(cmd_ctx, "%2d: %-10s %-10s %-10s %8d %s",
+               command_print(cmd_ctx, "%2d: %-10s %-10s %-10s %10d %14s %s",
                                          target->target_number,
                                          target->cmd_name,
                                          target->type->name,
                                          Jim_Nvp_value2name_simple( nvp_target_endian, target->endianness )->name,
-                                         target->chain_position,
+                                         target->tap->abs_chain_position,
+                                         target->tap->dotted_name,
                                          Jim_Nvp_value2name_simple( nvp_target_state, target->state )->name );
                target = target->next;
        }
@@ -1513,59 +1386,134 @@ int handle_targets_command(struct command_context_s *cmd_ctx, char *cmd, char **
        return ERROR_OK;
 }
 
+/* every 300ms we check for reset & powerdropout and issue a "reset halt" if so. */
+
+static int powerDropout;
+static int srstAsserted;
 
+static int runPowerRestore;
+static int runPowerDropout;
+static int runSrstAsserted;
+static int runSrstDeasserted;
 
-int handle_working_area_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc)
+static int sense_handler(void)
 {
-       int retval = ERROR_OK;
-       target_t *target = NULL;
+       static int prevSrstAsserted = 0;
+       static int prevPowerdropout = 0;
 
-       if ((argc < 4) || (argc > 5))
-       {
-               return ERROR_COMMAND_SYNTAX_ERROR;
-       }
+       int retval;
+       if ((retval=jtag_power_dropout(&powerDropout))!=ERROR_OK)
+               return retval;
 
-       target = get_target_by_num(strtoul(args[0], NULL, 0));
-       if (!target)
+       int powerRestored;
+       powerRestored = prevPowerdropout && !powerDropout;
+       if (powerRestored)
        {
-               return ERROR_COMMAND_SYNTAX_ERROR;
+               runPowerRestore = 1;
        }
-       target_free_all_working_areas(target);
 
-       target->working_area_phys = target->working_area_virt = strtoul(args[1], NULL, 0);
-       if (argc == 5)
+       long long current = timeval_ms();
+       static long long lastPower = 0;
+       int waitMore = lastPower + 2000 > current;
+       if (powerDropout && !waitMore)
        {
-               target->working_area_virt = strtoul(args[4], NULL, 0);
+               runPowerDropout = 1;
+               lastPower = current;
        }
-       target->working_area_size = strtoul(args[2], NULL, 0);
 
-       if (strcmp(args[3], "backup") == 0)
+       if ((retval=jtag_srst_asserted(&srstAsserted))!=ERROR_OK)
+               return retval;
+
+       int srstDeasserted;
+       srstDeasserted = prevSrstAsserted && !srstAsserted;
+
+       static long long lastSrst = 0;
+       waitMore = lastSrst + 2000 > current;
+       if (srstDeasserted && !waitMore)
        {
-               target->backup_working_area = 1;
+               runSrstDeasserted = 1;
+               lastSrst = current;
        }
-       else if (strcmp(args[3], "nobackup") == 0)
+
+       if (!prevSrstAsserted && srstAsserted)
        {
-               target->backup_working_area = 0;
+               runSrstAsserted = 1;
        }
-       else
+
+       prevSrstAsserted = srstAsserted;
+       prevPowerdropout = powerDropout;
+
+       if (srstDeasserted || powerRestored)
        {
-               LOG_ERROR("unrecognized <backup|nobackup> argument (%s)", args[3]);
-               return ERROR_COMMAND_SYNTAX_ERROR;
+               /* Other than logging the event we can't do anything here.
+                * Issuing a reset is a particularly bad idea as we might
+                * be inside a reset already.
+                */
        }
 
-       return retval;
+       return ERROR_OK;
 }
 
-
 /* process target state changes */
 int handle_target(void *priv)
 {
        int retval = ERROR_OK;
+
+       /* we do not want to recurse here... */
+       static int recursive = 0;
+       if (! recursive)
+       {
+               recursive = 1;
+               sense_handler();
+               /* danger! running these procedures can trigger srst assertions and power dropouts.
+                * We need to avoid an infinite loop/recursion here and we do that by
+                * clearing the flags after running these events.
+                */
+               int did_something = 0;
+               if (runSrstAsserted)
+               {
+                       Jim_Eval( interp, "srst_asserted");
+                       did_something = 1;
+               }
+               if (runSrstDeasserted)
+               {
+                       Jim_Eval( interp, "srst_deasserted");
+                       did_something = 1;
+               }
+               if (runPowerDropout)
+               {
+                       Jim_Eval( interp, "power_dropout");
+                       did_something = 1;
+               }
+               if (runPowerRestore)
+               {
+                       Jim_Eval( interp, "power_restore");
+                       did_something = 1;
+               }
+
+               if (did_something)
+               {
+                       /* clear detect flags */
+                       sense_handler();
+               }
+
+               /* clear action flags */
+
+               runSrstAsserted=0;
+               runSrstDeasserted=0;
+               runPowerRestore=0;
+               runPowerDropout=0;
+
+               recursive = 0;
+       }
+
        target_t *target = all_targets;
 
        while (target)
        {
-               if (target_continous_poll)
+
+               /* only poll target if we've got power and srst isn't asserted */
+               if (target_continous_poll&&!powerDropout&&!srstAsserted)
                {
                        /* polling may fail silently until the target has been examined */
                        if((retval = target_poll(target)) != ERROR_OK)
@@ -1689,7 +1637,6 @@ int handle_reg_command(struct command_context_s *cmd_ctx, char *cmd, char **args
        return ERROR_OK;
 }
 
-
 int handle_poll_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc)
 {
        int retval = ERROR_OK;
@@ -1722,7 +1669,6 @@ int handle_poll_command(struct command_context_s *cmd_ctx, char *cmd, char **arg
                return ERROR_COMMAND_SYNTAX_ERROR;
        }
 
-
        return retval;
 }
 
@@ -1767,14 +1713,14 @@ int target_wait_state(target_t *target, enum target_state state, int ms)
                {
                        once=0;
                        LOG_DEBUG("waiting for target %s...",
-                             Jim_Nvp_value2name_simple(nvp_target_state,state)->name);
+                               Jim_Nvp_value2name_simple(nvp_target_state,state)->name);
                }
 
                gettimeofday(&now, NULL);
                if ((now.tv_sec > timeout.tv_sec) || ((now.tv_sec == timeout.tv_sec) && (now.tv_usec >= timeout.tv_usec)))
                {
                        LOG_ERROR("timed out while waiting for target %s",
-                             Jim_Nvp_value2name_simple(nvp_target_state,state)->name);
+                               Jim_Nvp_value2name_simple(nvp_target_state,state)->name);
                        return ERROR_FAIL;
                }
        }
@@ -1826,24 +1772,6 @@ int handle_reset_command(struct command_context_s *cmd_ctx, char *cmd, char **ar
        return target_process_reset(cmd_ctx, reset_mode);
 }
 
-int handle_NEWreset_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc)
-{
-       int x;
-       char *cp;
-
-       if (argc >= 1){
-               x = strtol( args[0], &cp, 0 );
-               if( *cp != 0 ){
-                       command_print( cmd_ctx, "Not numeric: %s\n", args[0] );
-                       return ERROR_COMMAND_SYNTAX_ERROR;
-               }
-               USE_OLD_RESET = !!x;
-       }
-       command_print( cmd_ctx, "reset method: %d (%s)\n",
-                                  USE_OLD_RESET,
-                                  USE_OLD_RESET ? "old-method" : "new-method" );
-       return ERROR_OK;
-}
 
 int handle_resume_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc)
 {
@@ -1871,10 +1799,10 @@ int handle_step_command(struct command_context_s *cmd_ctx, char *cmd, char **arg
        LOG_DEBUG("-");
 
        if (argc == 0)
-               target->type->step(target, 1, 0, 1); /* current pc, addr = 0, handle breakpoints */
+               return target->type->step(target, 1, 0, 1); /* current pc, addr = 0, handle breakpoints */
 
        if (argc == 1)
-               target->type->step(target, 0, strtoul(args[0], NULL, 0), 1); /* addr = args[0], handle breakpoints */
+               return target->type->step(target, 0, strtoul(args[0], NULL, 0), 1); /* addr = args[0], handle breakpoints */
 
        return ERROR_OK;
 }
@@ -1904,7 +1832,6 @@ int handle_md_command(struct command_context_s *cmd_ctx, char *cmd, char **args,
 
        address = strtoul(args[0], NULL, 0);
 
-
        switch (cmd[2])
        {
                case 'w':
@@ -2071,7 +1998,6 @@ int handle_load_image_command(struct command_context_s *cmd_ctx, char *cmd, char
                return ERROR_COMMAND_SYNTAX_ERROR;
        }
 
-
        duration_start_measure(&duration);
 
        if (image_open(&image, args[0], (argc >= 3) ? args[2] : NULL) != ERROR_OK)
@@ -2099,7 +2025,6 @@ int handle_load_image_command(struct command_context_s *cmd_ctx, char *cmd, char
                u32 offset=0;
                u32 length=buf_cnt;
 
-
                /* DANGER!!! beware of unsigned comparision here!!! */
 
                if ((image.sections[i].base_address+buf_cnt>=min_address)&&
@@ -2516,6 +2441,7 @@ int handle_virt2phys_command(command_context_t *cmd_ctx, char *cmd, char **args,
        }
        return retval;
 }
+
 static void writeLong(FILE *f, int l)
 {
        int i;
@@ -2526,14 +2452,13 @@ static void writeLong(FILE *f, int l)
        }
 
 }
+
 static void writeString(FILE *f, char *s)
 {
        fwrite(s, 1, strlen(s), f);
 }
 
-
-
-// Dump a gmon.out histogram file.
+/* Dump a gmon.out histogram file. */
 static void writeGmon(u32 *samples, int sampleNum, char *filename)
 {
        int i;
@@ -2541,14 +2466,14 @@ static void writeGmon(u32 *samples, int sampleNum, char *filename)
        if (f==NULL)
                return;
        fwrite("gmon", 1, 4, f);
-       writeLong(f, 0x00000001); // Version
-       writeLong(f, 0); // padding
-       writeLong(f, 0); // padding
-       writeLong(f, 0); // padding
+       writeLong(f, 0x00000001); /* Version */
+       writeLong(f, 0); /* padding */
+       writeLong(f, 0); /* padding */
+       writeLong(f, 0); /* padding */
 
-       fwrite("", 1, 1, f);  // GMON_TAG_TIME_HIST
+       fwrite("", 1, 1, f);  /* GMON_TAG_TIME_HIST */
 
-       // figure out bucket size
+       /* figure out bucket size */
        u32 min=samples[0];
        u32 max=samples[0];
        for (i=0; i<sampleNum; i++)
@@ -2565,7 +2490,7 @@ static void writeGmon(u32 *samples, int sampleNum, char *filename)
 
        int addressSpace=(max-min+1);
 
-       static int const maxBuckets=256*1024; // maximum buckets.
+       static int const maxBuckets=256*1024; /* maximum buckets. */
        int length=addressSpace;
        if (length > maxBuckets)
        {
@@ -2584,23 +2509,23 @@ static void writeGmon(u32 *samples, int sampleNum, char *filename)
                long long a=address-min;
                long long b=length-1;
                long long c=addressSpace-1;
-               int index=(a*b)/c; // danger!!!! int32 overflows
+               int index=(a*b)/c; /* danger!!!! int32 overflows */
                buckets[index]++;
        }
 
-       //                         append binary memory gmon.out &profile_hist_hdr ((char*)&profile_hist_hdr + sizeof(struct gmon_hist_hdr))
-       writeLong(f, min);                                      // low_pc
-       writeLong(f, max);              // high_pc
-       writeLong(f, length);           // # of samples
-       writeLong(f, 64000000);                         // 64MHz
+       /* append binary memory gmon.out &profile_hist_hdr ((char*)&profile_hist_hdr + sizeof(struct gmon_hist_hdr)) */
+       writeLong(f, min);                      /* low_pc */
+       writeLong(f, max);                      /* high_pc */
+       writeLong(f, length);           /* # of samples */
+       writeLong(f, 64000000);         /* 64MHz */
        writeString(f, "seconds");
        for (i=0; i<(15-strlen("seconds")); i++)
        {
-               fwrite("", 1, 1, f);  // padding
+               fwrite("", 1, 1, f);    /* padding */
        }
        writeString(f, "s");
 
-//                        append binary memory gmon.out profile_hist_data (profile_hist_data + profile_hist_hdr.hist_size)
+       /*append binary memory gmon.out profile_hist_data (profile_hist_data + profile_hist_hdr.hist_size) */
 
        char *data=malloc(2*length);
        if (data!=NULL)
@@ -2654,7 +2579,7 @@ int handle_profile_command(struct command_context_s *cmd_ctx, char *cmd, char **
 
        int numSamples=0;
        int retval=ERROR_OK;
-       // hopefully it is safe to cache! We want to stop/restart as quickly as possible.
+       /* hopefully it is safe to cache! We want to stop/restart as quickly as possible. */
        reg_t *reg = register_get_by_name(target->reg_cache, "pc", 1);
 
        for (;;)
@@ -2666,10 +2591,10 @@ int handle_profile_command(struct command_context_s *cmd_ctx, char *cmd, char **
                        samples[numSamples++]=t;
                        retval = target_resume(target, 1, 0, 0, 0); /* current pc, addr = 0, do not handle breakpoints, not debugging */
                        target_poll(target);
-                       alive_sleep(10); // sleep 10ms, i.e. <100 samples/second.
+                       alive_sleep(10); /* sleep 10ms, i.e. <100 samples/second. */
                } else if (target->state == TARGET_RUNNING)
                {
-                       // We want to quickly sample the PC.
+                       /* We want to quickly sample the PC. */
                        if((retval = target_halt(target)) != ERROR_OK)
                        {
                                free(samples);
@@ -2767,7 +2692,7 @@ static int target_mem2array(Jim_Interp *interp, target_t *target, int argc, Jim_
 {
        long l;
        u32 width;
-       u32 len;
+       int len;
        u32 addr;
        u32 count;
        u32 v;
@@ -2944,12 +2869,11 @@ static int jim_array2mem(Jim_Interp *interp, int argc, Jim_Obj *const *argv)
        return target_array2mem( interp,target, argc, argv );
 }
 
-
 static int target_array2mem(Jim_Interp *interp, target_t *target, int argc, Jim_Obj *const *argv)
 {
        long l;
        u32 width;
-       u32 len;
+       int len;
        u32 addr;
        u32 count;
        u32 v;
@@ -3029,7 +2953,6 @@ static int target_array2mem(Jim_Interp *interp, target_t *target, int argc, Jim_
                return JIM_ERR;
        }
 
-
        /* Transfer loop */
 
        /* index counter */
@@ -3077,15 +3000,13 @@ static int target_array2mem(Jim_Interp *interp, target_t *target, int argc, Jim_
        return JIM_OK;
 }
 
-void
-target_all_handle_event( enum target_event e )
+void target_all_handle_event( enum target_event e )
 {
        target_t *target;
 
-
        LOG_DEBUG( "**all*targets: event: %d, %s",
-                  e,
-                  Jim_Nvp_value2name_simple( nvp_target_event, e )->name );
+                       e,
+                       Jim_Nvp_value2name_simple( nvp_target_event, e )->name );
 
        target = all_targets;
        while (target){
@@ -3094,8 +3015,7 @@ target_all_handle_event( enum target_event e )
        }
 }
 
-void
-target_handle_event( target_t *target, enum target_event e )
+void target_handle_event( target_t *target, enum target_event e )
 {
        target_event_action_t *teap;
        int done;
@@ -3139,7 +3059,6 @@ enum target_cfg_param {
        TCFG_CHAIN_POSITION,
 };
 
-
 static Jim_Nvp nvp_config_opts[] = {
        { .name = "-type",             .value = TCFG_TYPE },
        { .name = "-event",            .value = TCFG_EVENT },
@@ -3154,10 +3073,7 @@ static Jim_Nvp nvp_config_opts[] = {
        { .name = NULL, .value = -1 }
 };
 
-
-static int
-target_configure( Jim_GetOptInfo *goi,
-                                 target_t *target )
+static int target_configure( Jim_GetOptInfo *goi, target_t *target )
 {
        Jim_Nvp *n;
        Jim_Obj *o;
@@ -3165,11 +3081,10 @@ target_configure( Jim_GetOptInfo *goi,
        char *cp;
        int e;
 
-
        /* parse config or cget options ... */
        while( goi->argc > 0 ){
                Jim_SetEmptyResult( goi->interp );
-               //Jim_GetOpt_Debug( goi );
+               /* Jim_GetOpt_Debug( goi ); */
 
                if( target->type->target_jim_configure ){
                        /* target defines a configure function */
@@ -3230,7 +3145,6 @@ target_configure( Jim_GetOptInfo *goi,
                                }
                        }
 
-
                        {
                                target_event_action_t *teap;
 
@@ -3396,19 +3310,25 @@ target_configure( Jim_GetOptInfo *goi,
                        break;
                case TCFG_CHAIN_POSITION:
                        if( goi->isconfigure ){
+                               Jim_Obj *o;
+                               jtag_tap_t *tap;
                                target_free_all_working_areas(target);
-                               e = Jim_GetOpt_Wide( goi, &w );
+                               e = Jim_GetOpt_Obj( goi, &o );
                                if( e != JIM_OK ){
                                        return e;
                                }
+                               tap = jtag_TapByJimObj( goi->interp, o );
+                               if( tap == NULL ){
+                                       return JIM_ERR;
+                               }
                                /* make this exactly 1 or 0 */
-                               target->chain_position = w;
+                               target->tap = tap;
                        } else {
                                if( goi->argc != 0 ){
                                        goto no_params;
                                }
                        }
-                       Jim_SetResult( interp, Jim_NewIntObj( goi->interp, target->chain_position ) );
+                       Jim_SetResultString( interp, target->tap->dotted_name, -1 );
                        /* loop for more e*/
                        break;
                }
@@ -3417,12 +3337,8 @@ target_configure( Jim_GetOptInfo *goi,
        return JIM_OK;
 }
 
-
 /** this is the 'tcl' handler for the target specific command */
-static int
-tcl_target_func( Jim_Interp *interp,
-                                int argc,
-                                Jim_Obj *const *argv )
+static int tcl_target_func( Jim_Interp *interp, int argc, Jim_Obj *const *argv )
 {
        Jim_GetOptInfo goi;
        jim_wide a,b,c;
@@ -3433,7 +3349,6 @@ tcl_target_func( Jim_Interp *interp,
        struct command_context_s *cmd_ctx;
        int e;
 
-
        enum {
                TS_CMD_CONFIGURE,
                TS_CMD_CGET,
@@ -3476,7 +3391,6 @@ tcl_target_func( Jim_Interp *interp,
                { .name = NULL, .value = -1 },
        };
 
-
        /* go past the "command" */
        Jim_GetOpt_Setup( &goi, interp, argc-1, argv+1 );
 
@@ -3489,7 +3403,7 @@ tcl_target_func( Jim_Interp *interp,
                Jim_GetOpt_NvpUnknown( &goi, target_options, 0 );
                return e;
        }
-       // Assume blank result
+       /* Assume blank result */
        Jim_SetEmptyResult( goi.interp );
 
        switch( n->value ){
@@ -3720,17 +3634,17 @@ tcl_target_func( Jim_Interp *interp,
                        Jim_GetOpt_NvpUnknown( &goi, nvp_assert, 1 );
                        return e;
                }
-               // the halt or not param
+               /* the halt or not param */
                e = Jim_GetOpt_Wide( &goi, &a);
                if( e != JIM_OK ){
                        return e;
                }
-               // determine if we should halt or not.
+               /* determine if we should halt or not. */
                target->reset_halt = !!a;
-               // When this happens - all workareas are invalid.
+               /* When this happens - all workareas are invalid. */
                target_free_all_working_areas_restore(target, 0);
 
-               // do the assert
+               /* do the assert */
                if( n->value == NVP_ASSERT ){
                        target->type->assert_reset( target );
                } else {
@@ -3745,7 +3659,7 @@ tcl_target_func( Jim_Interp *interp,
                target->type->halt( target );
                return JIM_OK;
        case TS_CMD_WAITSTATE:
-               // params:  <name>  statename timeoutmsecs
+               /* params:  <name>  statename timeoutmsecs */
                if( goi.argc != 2 ){
                        Jim_SetResult_sprintf( goi.interp, "%s STATENAME TIMEOUTMSECS", n->name );
                        return JIM_ERR;
@@ -3765,7 +3679,7 @@ tcl_target_func( Jim_Interp *interp,
                                                                   "target: %s wait %s fails (%d) %s",
                                                                   target->cmd_name,
                                                                   n->name,
-                                              e, target_strerror_safe(e) );
+                                                                  e, target_strerror_safe(e) );
                        return JIM_ERR;
                } else {
                        return JIM_OK;
@@ -3816,11 +3730,8 @@ tcl_target_func( Jim_Interp *interp,
        return JIM_ERR;
 }
 
-
-static int
-target_create( Jim_GetOptInfo *goi )
+static int target_create( Jim_GetOptInfo *goi )
 {
-
        Jim_Obj *new_cmd;
        Jim_Cmd *cmd;
        const char *cp;
@@ -3874,7 +3785,6 @@ target_create( Jim_GetOptInfo *goi )
                return JIM_ERR;
        }
 
-
        /* Create it */
        target = calloc(1,sizeof(target_t));
        /* set target number */
@@ -3901,6 +3811,8 @@ target_create( Jim_GetOptInfo *goi )
        target->next                = NULL;
        target->arch_info           = NULL;
 
+       target->display             = 1;
+
        /* initialize trace information */
        target->trace_info = malloc(sizeof(trace_t));
        target->trace_info->num_trace_points         = 0;
@@ -3930,6 +3842,10 @@ target_create( Jim_GetOptInfo *goi )
                target->endianness = TARGET_LITTLE_ENDIAN;
        }
 
+       /* incase variant is not set */
+       if (!target->variant)
+               target->variant = strdup("");
+       
        /* create the target specific commands */
        if( target->type->register_commands ){
                (*(target->type->register_commands))( cmd_ctx );
@@ -3959,17 +3875,14 @@ target_create( Jim_GetOptInfo *goi )
                                                   target, /* private data */
                                                   NULL ); /* no del proc */
 
-       (*(target->type->target_create))( target, goi->interp );
        return e;
 }
 
-static int
-jim_target( Jim_Interp *interp, int argc, Jim_Obj *const *argv )
+static int jim_target( Jim_Interp *interp, int argc, Jim_Obj *const *argv )
 {
        int x,r,e;
        jim_wide w;
        struct command_context_s *cmd_ctx;
-       const char *cp;
        target_t *target;
        Jim_GetOptInfo goi;
        enum tcmd {
@@ -3984,7 +3897,7 @@ jim_target( Jim_Interp *interp, int argc, Jim_Obj *const *argv )
        const char *target_cmds[] = {
                "create", "types", "names", "current", "number",
                "count",
-               NULL // terminate
+               NULL /* terminate */
        };
 
        LOG_DEBUG("Target command params:");
@@ -3999,85 +3912,7 @@ jim_target( Jim_Interp *interp, int argc, Jim_Obj *const *argv )
                return JIM_ERR;
        }
 
-       /* is this old syntax? */
-       /* To determine: We have to peek at argv[0]*/
-       cp = Jim_GetString( goi.argv[0], NULL );
-       for( x = 0 ; target_types[x] ; x++ ){
-               if( 0 == strcmp(cp,target_types[x]->name) ){
-                       break;
-               }
-       }
-       if( target_types[x] ){
-               /* YES IT IS OLD SYNTAX */
-               Jim_Obj *new_argv[10];
-               int      new_argc;
-
-               /* target_old_syntax
-                *
-                * argv[0] typename (above)
-                * argv[1] endian
-                * argv[2] reset method, deprecated/ignored
-                * argv[3] = old param
-                * argv[4] = old param
-                *
-                * We will combine all "old params" into a single param.
-                * Then later, split them again.
-                */
-               if( argc < 4 ){
-                       Jim_WrongNumArgs( interp, 1, argv, "[OLDSYNTAX] ?TYPE? ?ENDIAN? ?RESET? ?old-params?");
-                       return JIM_ERR;
-               }
-               /* the command */
-               new_argv[0] = argv[0];
-               new_argv[1] = Jim_NewStringObj( interp, "create", -1 );
-               {
-                       char buf[ 30 ];
-                       sprintf( buf, "target%d", new_target_number() );
-                       new_argv[2] = Jim_NewStringObj( interp, buf , -1 );
-               }
-               new_argv[3] = goi.argv[0]; /* typename */
-               new_argv[4] = Jim_NewStringObj( interp, "-endian", -1 );
-               new_argv[5] = goi.argv[1];
-               new_argv[6] = Jim_NewStringObj( interp, "-chain-position", -1 );
-               new_argv[7] = goi.argv[2];
-               new_argv[8] = Jim_NewStringObj( interp, "-variant", -1 );
-               new_argv[9] = goi.argv[3];
-               new_argc = 10;
-               /*
-                * new arg syntax:
-                *   argv[0] = command
-                *   argv[1] = create
-                *   argv[2] = cmdname
-                *   argv[3] = typename
-                *   argv[4] = **FIRST** "configure" option.
-                *
-                * Here, we make them:
-                *
-                *   argv[4] = -endian
-                *   argv[5] = little
-                *   argv[6] = -position
-                *   argv[7] = NUMBER
-                *   argv[8] = -variant
-                *   argv[9] = "somestring"
-                */
-
-               /* don't let these be released */
-               for( x = 0 ; x < new_argc ; x++ ){
-                       Jim_IncrRefCount( new_argv[x]);
-               }
-               /* call our self */
-               LOG_DEBUG("Target OLD SYNTAX - converted to new syntax");
-
-               r = jim_target( goi.interp, new_argc, new_argv );
-
-               /* release? these items */
-               for( x = 0 ; x < new_argc ; x++ ){
-                       Jim_DecrRefCount( interp, new_argv[x] );
-               }
-               return r;
-       }
-
-       //Jim_GetOpt_Debug( &goi );
+       /* Jim_GetOpt_Debug( &goi ); */
        r = Jim_GetOpt_Enum( &goi, target_cmds, &x   );
        if( r != JIM_OK ){
                return r;

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