Cleanup and improve handle_halt_command:

[openocd.git] / src / target / target.c

/***************************************************************************
 *   Copyright (C) 2005 by Dominic Rath                                    *
 *   Dominic.Rath@gmx.de                                                   *
 *                                                                         *
 *   Copyright (C) 2007,2008 Øyvind Harboe                                 *
 *   oyvind.harboe@zylin.com                                               *
 *                                                                         *
 *   Copyright (C) 2008, Duane Ellis                                       *
 *   openocd@duaneeellis.com                                               *
 *                                                                         *
 *   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     *
 *   (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.             *
 ***************************************************************************/
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif

#include "target.h"
#include "target_type.h"
#include "target_request.h"
#include "time_support.h"
#include "register.h"
#include "trace.h"
#include "image.h"
#include "jtag.h"


static int handle_targets_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc);

static int handle_reg_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc);
static int handle_poll_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc);
static int handle_halt_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc);
static int handle_wait_halt_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc);
static int handle_reset_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc);
static int handle_soft_reset_halt_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc);
static int handle_resume_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc);
static int handle_step_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc);
static int handle_md_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc);
static int handle_mw_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc);
static int handle_load_image_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc);
static int handle_dump_image_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc);
static int handle_verify_image_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc);
static int handle_test_image_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc);
static int handle_bp_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc);
static int handle_rbp_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc);
static int handle_wp_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc);
static int handle_rwp_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc);
static int handle_virt2phys_command(command_context_t *cmd_ctx, char *cmd, char **args, int argc);
static int handle_profile_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc);
static int handle_fast_load_image_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc);
static int handle_fast_load_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc);

static int jim_array2mem(Jim_Interp *interp, int argc, Jim_Obj *const *argv);
static int jim_mem2array(Jim_Interp *interp, int argc, Jim_Obj *const *argv);
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;
extern target_type_t arm9tdmi_target;
extern target_type_t arm920t_target;
extern target_type_t arm966e_target;
extern target_type_t arm926ejs_target;
extern target_type_t feroceon_target;
extern target_type_t xscale_target;
extern target_type_t cortexm3_target;
extern target_type_t cortexa8_target;
extern target_type_t arm11_target;
extern target_type_t mips_m4k_target;
extern target_type_t avr_target;

target_type_t *target_types[] =
{
        &arm7tdmi_target,
        &arm9tdmi_target,
        &arm920t_target,
        &arm720t_target,
        &arm966e_target,
        &arm926ejs_target,
        &feroceon_target,
        &xscale_target,
        &cortexm3_target,
        &cortexa8_target,
        &arm11_target,
        &mips_m4k_target,
        &avr_target,
        NULL,
};

target_t *all_targets = NULL;
target_event_callback_t *target_event_callbacks = NULL;
target_timer_callback_t *target_timer_callbacks = NULL;

const Jim_Nvp nvp_assert[] = {
        { .name = "assert", NVP_ASSERT },
        { .name = "deassert", NVP_DEASSERT },
        { .name = "T", NVP_ASSERT },
        { .name = "F", NVP_DEASSERT },
        { .name = "t", NVP_ASSERT },
        { .name = "f", NVP_DEASSERT },
        { .name = NULL, .value = -1 }
};

const Jim_Nvp nvp_error_target[] = {
        { .value = ERROR_TARGET_INVALID, .name = "err-invalid" },
        { .value = ERROR_TARGET_INIT_FAILED, .name = "err-init-failed" },
        { .value = ERROR_TARGET_TIMEOUT, .name = "err-timeout" },
        { .value = ERROR_TARGET_NOT_HALTED, .name = "err-not-halted" },
        { .value = ERROR_TARGET_FAILURE, .name = "err-failure" },
        { .value = ERROR_TARGET_UNALIGNED_ACCESS   , .name = "err-unaligned-access" },
        { .value = ERROR_TARGET_DATA_ABORT , .name = "err-data-abort" },
        { .value = ERROR_TARGET_RESOURCE_NOT_AVAILABLE , .name = "err-resource-not-available" },
        { .value = ERROR_TARGET_TRANSLATION_FAULT  , .name = "err-translation-fault" },
        { .value = ERROR_TARGET_NOT_RUNNING, .name = "err-not-running" },
        { .value = ERROR_TARGET_NOT_EXAMINED, .name = "err-not-examined" },
        { .value = -1, .name = NULL }
};

const char *target_strerror_safe( int err )
{
        const Jim_Nvp *n;

        n = Jim_Nvp_value2name_simple( nvp_error_target, err );
        if( n->name == NULL ){
                return "unknown";
        } else {
                return n->name;
        }
}

static const Jim_Nvp nvp_target_event[] = {
        { .value = TARGET_EVENT_OLD_gdb_program_config , .name = "old-gdb_program_config" },
        { .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" },

        { .value = TARGET_EVENT_RESET_ASSERT_PRE,    .name = "reset-assert-pre" },
        { .value = TARGET_EVENT_RESET_ASSERT_POST,   .name = "reset-assert-post" },
        { .value = TARGET_EVENT_RESET_DEASSERT_PRE,  .name = "reset-deassert-pre" },
        { .value = TARGET_EVENT_RESET_DEASSERT_POST, .name = "reset-deassert-post" },
        { .value = TARGET_EVENT_RESET_HALT_PRE,      .name = "reset-halt-pre" },
        { .value = TARGET_EVENT_RESET_HALT_POST,     .name = "reset-halt-post" },
        { .value = TARGET_EVENT_RESET_WAIT_PRE,      .name = "reset-wait-pre" },
        { .value = TARGET_EVENT_RESET_WAIT_POST,     .name = "reset-wait-post" },
        { .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_END, .name = "examine-end" },

        { .value = TARGET_EVENT_DEBUG_HALTED, .name = "debug-halted" },
        { .value = TARGET_EVENT_DEBUG_RESUMED, .name = "debug-resumed" },

        { .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"   },

        { .value = TARGET_EVENT_GDB_FLASH_ERASE_START, .name = "gdb-flash-erase-start" },
        { .value = TARGET_EVENT_GDB_FLASH_ERASE_END  , .name = "gdb-flash-erase-end" },

        { .value = TARGET_EVENT_RESUME_START, .name = "resume-start" },
        { .value = TARGET_EVENT_RESUMED     , .name = "resume-ok" },
        { .value = TARGET_EVENT_RESUME_END  , .name = "resume-end" },

        { .name = NULL, .value = -1 }
};

const Jim_Nvp nvp_target_state[] = {
        { .name = "unknown", .value = TARGET_UNKNOWN },
        { .name = "running", .value = TARGET_RUNNING },
        { .name = "halted",  .value = TARGET_HALTED },
        { .name = "reset",   .value = TARGET_RESET },
        { .name = "debug-running", .value = TARGET_DEBUG_RUNNING },
        { .name = NULL, .value = -1 },
};

const Jim_Nvp nvp_target_debug_reason [] = {
        { .name = "debug-request"            , .value = DBG_REASON_DBGRQ },
        { .name = "breakpoint"               , .value = DBG_REASON_BREAKPOINT },
        { .name = "watchpoint"               , .value = DBG_REASON_WATCHPOINT },
        { .name = "watchpoint-and-breakpoint", .value = DBG_REASON_WPTANDBKPT },
        { .name = "single-step"              , .value = DBG_REASON_SINGLESTEP },
        { .name = "target-not-halted"        , .value = DBG_REASON_NOTHALTED  },
        { .name = "undefined"                , .value = DBG_REASON_UNDEFINED },
        { .name = NULL, .value = -1 },
};

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 = NULL,     .value = -1 },
};

const Jim_Nvp nvp_reset_modes[] = {
        { .name = "unknown", .value = RESET_UNKNOWN },
        { .name = "run"    , .value = RESET_RUN },
        { .name = "halt"   , .value = RESET_HALT },
        { .name = "init"   , .value = RESET_INIT },
        { .name = NULL     , .value = -1 },
};

static int max_target_number(void)
{
        target_t *t;
        int x;

        x = -1;
        t = all_targets;
        while( t ){
                if( x < t->target_number ){
                        x = (t->target_number)+1;
                }
                t = t->next;
        }
        return x;
}

/* determine the number of the new target */
static int new_target_number(void)
{
        target_t *t;
        int x;

        /* number is 0 based */
        x = -1;
        t = all_targets;
        while(t){
                if( x < t->target_number ){
                        x = t->target_number;
                }
                t = t->next;
        }
        return x+1;
}

static int target_continous_poll = 1;

/* read a u32 from a buffer in target memory endianness */
u32 target_buffer_get_u32(target_t *target, const u8 *buffer)
{
        if (target->endianness == TARGET_LITTLE_ENDIAN)
                return le_to_h_u32(buffer);
        else
                return be_to_h_u32(buffer);
}

/* read a u16 from a buffer in target memory endianness */
u16 target_buffer_get_u16(target_t *target, const u8 *buffer)
{
        if (target->endianness == TARGET_LITTLE_ENDIAN)
                return le_to_h_u16(buffer);
        else
                return be_to_h_u16(buffer);
}

/* read a u8 from a buffer in target memory endianness */
u8 target_buffer_get_u8(target_t *target, const u8 *buffer)
{
        return *buffer & 0x0ff;
}

/* write a u32 to a buffer in target memory endianness */
void target_buffer_set_u32(target_t *target, u8 *buffer, u32 value)
{
        if (target->endianness == TARGET_LITTLE_ENDIAN)
                h_u32_to_le(buffer, value);
        else
                h_u32_to_be(buffer, value);
}

/* write a u16 to a buffer in target memory endianness */
void target_buffer_set_u16(target_t *target, u8 *buffer, u16 value)
{
        if (target->endianness == TARGET_LITTLE_ENDIAN)
                h_u16_to_le(buffer, value);
        else
                h_u16_to_be(buffer, value);
}

/* write a u8 to a buffer in target memory endianness */
void target_buffer_set_u8(target_t *target, u8 *buffer, u8 value)
{
        *buffer = value;
}

/* return a pointer to a configured target; id is name or number */
target_t *get_target(const char *id)
{
        target_t *target;

        /* try as tcltarget name */
        for (target = all_targets; target; target = target->next) {
                if (target->cmd_name == NULL)
                        continue;
                if (strcmp(id, target->cmd_name) == 0)
                        return target;
        }

        /* no match, try as number */
        unsigned num;
        if (parse_uint(id, &num) != ERROR_OK)
                return NULL;

        for (target = all_targets; target; target = target->next) {
                if (target->target_number == (int)num)
                        return target;
        }

        return NULL;
}

/* returns a pointer to the n-th configured target */
static target_t *get_target_by_num(int num)
{
        target_t *target = all_targets;

        while (target){
                if( target->target_number == num ){
                        return target;
                }
                target = target->next;
        }

        return NULL;
}

int get_num_by_target(target_t *query_target)
{
        return query_target->target_number;
}

target_t* get_current_target(command_context_t *cmd_ctx)
{
        target_t *target = get_target_by_num(cmd_ctx->current_target);

        if (target == NULL)
        {
                LOG_ERROR("BUG: current_target out of bounds");
                exit(-1);
        }

        return target;
}

int target_poll(struct target_s *target)
{
        /* We can't poll until after examine */
        if (!target_was_examined(target))
        {
                /* Fail silently lest we pollute the log */
                return ERROR_FAIL;
        }
        return target->type->poll(target);
}

int target_halt(struct target_s *target)
{
        /* We can't poll until after examine */
        if (!target_was_examined(target))
        {
                LOG_ERROR("Target not examined yet");
                return ERROR_FAIL;
        }
        return target->type->halt(target);
}

int target_resume(struct target_s *target, int current, u32 address, int handle_breakpoints, int debug_execution)
{
        int retval;

        /* We can't poll until after examine */
        if (!target_was_examined(target))
        {
                LOG_ERROR("Target not examined yet");
                return ERROR_FAIL;
        }

        /* note that resume *must* be asynchronous. The CPU can halt before we poll. The CPU can
         * even halt at the current PC as a result of a software breakpoint being inserted by (a bug?)
         * the application.
         */
        if ((retval = target->type->resume(target, current, address, handle_breakpoints, debug_execution)) != ERROR_OK)
                return retval;

        return retval;
}

int target_process_reset(struct command_context_s *cmd_ctx, enum target_reset_mode reset_mode)
{
        char buf[100];
        int retval;
        Jim_Nvp *n;
        n = Jim_Nvp_value2name_simple( nvp_reset_modes, reset_mode );
        if( n->name == NULL ){
                LOG_ERROR("invalid reset mode");
                return ERROR_FAIL;
        }

        /* disable polling during reset to make reset event scripts
         * more predictable, i.e. dr/irscan & pathmove in events will
         * not have JTAG operations injected into the middle of a sequence.
         */
        int save_poll = target_continous_poll;
        target_continous_poll = 0;

        sprintf( buf, "ocd_process_reset %s", n->name );
        retval = Jim_Eval( interp, buf );

        target_continous_poll = save_poll;

        if(retval != JIM_OK) {
                Jim_PrintErrorMessage(interp);
                return ERROR_FAIL;
        }

        /* We want any events to be processed before the prompt */
        retval = target_call_timer_callbacks_now();

        return retval;
}

static int default_virt2phys(struct target_s *target, u32 virtual, u32 *physical)
{
        *physical = virtual;
        return ERROR_OK;
}

static int default_mmu(struct target_s *target, int *enabled)
{
        *enabled = 0;
        return ERROR_OK;
}

static int default_examine(struct target_s *target)
{
        target_set_examined(target);
        return ERROR_OK;
}

int target_examine_one(struct target_s *target)
{
        return target->type->examine(target);
}

/* Targets that correctly implement init+examine, i.e.
 * no communication with target during init:
 *
 * XScale
 */
int target_examine(void)
{
        int retval = ERROR_OK;
        target_t *target;

        for (target = all_targets; target; target = target->next)
        {
                if (!target->tap->enabled)
                        continue;
                if ((retval = target_examine_one(target)) != ERROR_OK)
                        return retval;
        }
        return retval;
}
const char *target_get_name(struct target_s *target)
{
        return target->type->name;
}

static int target_write_memory_imp(struct target_s *target, u32 address, u32 size, u32 count, u8 *buffer)
{
        if (!target_was_examined(target))
        {
                LOG_ERROR("Target not examined yet");
                return ERROR_FAIL;
        }
        return target->type->write_memory_imp(target, address, size, count, buffer);
}

static int target_read_memory_imp(struct target_s *target, u32 address, u32 size, u32 count, u8 *buffer)
{
        if (!target_was_examined(target))
        {
                LOG_ERROR("Target not examined yet");
                return ERROR_FAIL;
        }
        return target->type->read_memory_imp(target, address, size, count, buffer);
}

static int target_soft_reset_halt_imp(struct target_s *target)
{
        if (!target_was_examined(target))
        {
                LOG_ERROR("Target not examined yet");
                return ERROR_FAIL;
        }
        return target->type->soft_reset_halt_imp(target);
}

static int target_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)
{
        if (!target_was_examined(target))
        {
                LOG_ERROR("Target not examined yet");
                return ERROR_FAIL;
        }
        return target->type->run_algorithm_imp(target, num_mem_params, mem_params, num_reg_params, reg_param, entry_point, exit_point, timeout_ms, arch_info);
}

int target_read_memory(struct target_s *target,
                u32 address, u32 size, u32 count, u8 *buffer)
{
        return target->type->read_memory(target, address, size, count, buffer);
}

int target_write_memory(struct target_s *target,
                u32 address, u32 size, u32 count, u8 *buffer)
{
        return target->type->write_memory(target, address, size, count, buffer);
}
int target_bulk_write_memory(struct target_s *target,
                u32 address, u32 count, u8 *buffer)
{
        return target->type->bulk_write_memory(target, address, count, buffer);
}

int target_add_breakpoint(struct target_s *target,
                struct breakpoint_s *breakpoint)
{
        return target->type->add_breakpoint(target, breakpoint);
}
int target_remove_breakpoint(struct target_s *target,
                struct breakpoint_s *breakpoint)
{
        return target->type->remove_breakpoint(target, breakpoint);
}

int target_add_watchpoint(struct target_s *target,
                struct watchpoint_s *watchpoint)
{
        return target->type->add_watchpoint(target, watchpoint);
}
int target_remove_watchpoint(struct target_s *target,
                struct watchpoint_s *watchpoint)
{
        return target->type->remove_watchpoint(target, watchpoint);
}

int target_get_gdb_reg_list(struct target_s *target,
                struct reg_s **reg_list[], int *reg_list_size)
{
        return target->type->get_gdb_reg_list(target, reg_list, reg_list_size);
}
int target_step(struct target_s *target,
                int current, u32 address, int handle_breakpoints)
{
        return target->type->step(target, current, address, handle_breakpoints);
}


int target_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)
{
        return target->type->run_algorithm(target,
                        num_mem_params, mem_params, num_reg_params, reg_param,
                        entry_point, exit_point, timeout_ms, arch_info);
}

/// @returns @c true if the target has been examined.
bool target_was_examined(struct target_s *target)
{
        return target->type->examined;
}
/// Sets the @c examined flag for the given target.
void target_set_examined(struct target_s *target)
{
        target->type->examined = true;
}
// Reset the @c examined flag for the given target.
void target_reset_examined(struct target_s *target)
{
        target->type->examined = false;
}


int target_init(struct command_context_s *cmd_ctx)
{
        target_t *target = all_targets;
        int retval;

        while (target)
        {
                target_reset_examined(target);
                if (target->type->examine == NULL)
                {
                        target->type->examine = default_examine;
                }

                if ((retval = target->type->init_target(cmd_ctx, target)) != ERROR_OK)
                {
                        LOG_ERROR("target '%s' init failed", target_get_name(target));
                        return retval;
                }

                /* Set up default functions if none are provided by target */
                if (target->type->virt2phys == NULL)
                {
                        target->type->virt2phys = default_virt2phys;
                }
                target->type->virt2phys = default_virt2phys;
                /* a non-invasive way(in terms of patches) to add some code that
                 * runs before the type->write/read_memory implementation
                 */
                target->type->write_memory_imp = target->type->write_memory;
                target->type->write_memory = target_write_memory_imp;
                target->type->read_memory_imp = target->type->read_memory;
                target->type->read_memory = target_read_memory_imp;
                target->type->soft_reset_halt_imp = target->type->soft_reset_halt;
                target->type->soft_reset_halt = target_soft_reset_halt_imp;
                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;
                }
                target = target->next;
        }

        if (all_targets)
        {
                if((retval = target_register_user_commands(cmd_ctx)) != ERROR_OK)
                        return retval;
                if((retval = target_register_timer_callback(handle_target, 100, 1, NULL)) != ERROR_OK)
                        return retval;
        }

        return ERROR_OK;
}

int target_register_event_callback(int (*callback)(struct target_s *target, enum target_event event, void *priv), void *priv)
{
        target_event_callback_t **callbacks_p = &target_event_callbacks;

        if (callback == NULL)
        {
                return ERROR_INVALID_ARGUMENTS;
        }

        if (*callbacks_p)
        {
                while ((*callbacks_p)->next)
                        callbacks_p = &((*callbacks_p)->next);
                callbacks_p = &((*callbacks_p)->next);
        }

        (*callbacks_p) = malloc(sizeof(target_event_callback_t));
        (*callbacks_p)->callback = callback;
        (*callbacks_p)->priv = priv;
        (*callbacks_p)->next = NULL;

        return ERROR_OK;
}

int target_register_timer_callback(int (*callback)(void *priv), int time_ms, int periodic, void *priv)
{
        target_timer_callback_t **callbacks_p = &target_timer_callbacks;
        struct timeval now;

        if (callback == NULL)
        {
                return ERROR_INVALID_ARGUMENTS;
        }

        if (*callbacks_p)
        {
                while ((*callbacks_p)->next)
                        callbacks_p = &((*callbacks_p)->next);
                callbacks_p = &((*callbacks_p)->next);
        }

        (*callbacks_p) = malloc(sizeof(target_timer_callback_t));
        (*callbacks_p)->callback = callback;
        (*callbacks_p)->periodic = periodic;
        (*callbacks_p)->time_ms = time_ms;

        gettimeofday(&now, NULL);
        (*callbacks_p)->when.tv_usec = now.tv_usec + (time_ms % 1000) * 1000;
        time_ms -= (time_ms % 1000);
        (*callbacks_p)->when.tv_sec = now.tv_sec + (time_ms / 1000);
        if ((*callbacks_p)->when.tv_usec > 1000000)
        {
                (*callbacks_p)->when.tv_usec = (*callbacks_p)->when.tv_usec - 1000000;
                (*callbacks_p)->when.tv_sec += 1;
        }

        (*callbacks_p)->priv = priv;
        (*callbacks_p)->next = NULL;

        return ERROR_OK;
}

int target_unregister_event_callback(int (*callback)(struct target_s *target, enum target_event event, void *priv), void *priv)
{
        target_event_callback_t **p = &target_event_callbacks;
        target_event_callback_t *c = target_event_callbacks;

        if (callback == NULL)
        {
                return ERROR_INVALID_ARGUMENTS;
        }

        while (c)
        {
                target_event_callback_t *next = c->next;
                if ((c->callback == callback) && (c->priv == priv))
                {
                        *p = next;
                        free(c);
                        return ERROR_OK;
                }
                else
                        p = &(c->next);
                c = next;
        }

        return ERROR_OK;
}

int target_unregister_timer_callback(int (*callback)(void *priv), void *priv)
{
        target_timer_callback_t **p = &target_timer_callbacks;
        target_timer_callback_t *c = target_timer_callbacks;

        if (callback == NULL)
        {
                return ERROR_INVALID_ARGUMENTS;
        }

        while (c)
        {
                target_timer_callback_t *next = c->next;
                if ((c->callback == callback) && (c->priv == priv))
                {
                        *p = next;
                        free(c);
                        return ERROR_OK;
                }
                else
                        p = &(c->next);
                c = next;
        }

        return ERROR_OK;
}

int target_call_event_callbacks(target_t *target, enum target_event event)
{
        target_event_callback_t *callback = target_event_callbacks;
        target_event_callback_t *next_callback;

        if (event == TARGET_EVENT_HALTED)
        {
                /* execute early halted first */
                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 );

        target_handle_event( target, event );

        while (callback)
        {
                next_callback = callback->next;
                callback->callback(target, event, callback->priv);
                callback = next_callback;
        }

        return ERROR_OK;
}

static int target_timer_callback_periodic_restart(
                target_timer_callback_t *cb, struct timeval *now)
{
        int time_ms = cb->time_ms;
        cb->when.tv_usec = now->tv_usec + (time_ms % 1000) * 1000;
        time_ms -= (time_ms % 1000);
        cb->when.tv_sec = now->tv_sec + time_ms / 1000;
        if (cb->when.tv_usec > 1000000)
        {
                cb->when.tv_usec = cb->when.tv_usec - 1000000;
                cb->when.tv_sec += 1;
        }
        return ERROR_OK;
}

static int target_call_timer_callback(target_timer_callback_t *cb,
                struct timeval *now)
{
        cb->callback(cb->priv);

        if (cb->periodic)
                return target_timer_callback_periodic_restart(cb, now);

        return target_unregister_timer_callback(cb->callback, cb->priv);
}

static int target_call_timer_callbacks_check_time(int checktime)
{
        keep_alive();

        struct timeval now;
        gettimeofday(&now, NULL);

        target_timer_callback_t *callback = target_timer_callbacks;
        while (callback)
        {
                // cleaning up may unregister and free this callback
                target_timer_callback_t *next_callback = callback->next;

                bool call_it = callback->callback &&
                        ((!checktime && callback->periodic) ||
                          now.tv_sec > callback->when.tv_sec ||
                         (now.tv_sec == callback->when.tv_sec &&
                          now.tv_usec >= callback->when.tv_usec));

                if (call_it)
                {
                        int retval = target_call_timer_callback(callback, &now);
                        if (retval != ERROR_OK)
                                return retval;
                }

                callback = next_callback;
        }

        return ERROR_OK;
}

int target_call_timer_callbacks(void)
{
        return target_call_timer_callbacks_check_time(1);
}

/* invoke periodic callbacks immediately */
int target_call_timer_callbacks_now(void)
{
        return target_call_timer_callbacks_check_time(0);
}

int target_alloc_working_area(struct target_s *target, u32 size, working_area_t **area)
{
        working_area_t *c = target->working_areas;
        working_area_t *new_wa = NULL;

        /* Reevaluate working area address based on MMU state*/
        if (target->working_areas == NULL)
        {
                int retval;
                int enabled;
                retval = target->type->mmu(target, &enabled);
                if (retval != ERROR_OK)
                {
                        return retval;
                }
                if (enabled)
                {
                        target->working_area = target->working_area_virt;
                }
                else
                {
                        target->working_area = target->working_area_phys;
                }
        }

        /* only allocate multiples of 4 byte */
        if (size % 4)
        {
                LOG_ERROR("BUG: code tried to allocate unaligned number of bytes, padding");
                size = CEIL(size, 4);
        }

        /* see if there's already a matching working area */
        while (c)
        {
                if ((c->free) && (c->size == size))
                {
                        new_wa = c;
                        break;
                }
                c = c->next;
        }

        /* if not, allocate a new one */
        if (!new_wa)
        {
                working_area_t **p = &target->working_areas;
                u32 first_free = target->working_area;
                u32 free_size = target->working_area_size;

                LOG_DEBUG("allocating new working area");

                c = target->working_areas;
                while (c)
                {
                        first_free += c->size;
                        free_size -= c->size;
                        p = &c->next;
                        c = c->next;
                }

                if (free_size < size)
                {
                        LOG_WARNING("not enough working area available(requested %d, free %d)", size, free_size);
                        return ERROR_TARGET_RESOURCE_NOT_AVAILABLE;
                }

                new_wa = malloc(sizeof(working_area_t));
                new_wa->next = NULL;
                new_wa->size = size;
                new_wa->address = first_free;

                if (target->backup_working_area)
                {
                        int retval;
                        new_wa->backup = malloc(new_wa->size);
                        if((retval = target_read_memory(target, new_wa->address, 4, new_wa->size / 4, new_wa->backup)) != ERROR_OK)
                        {
                                free(new_wa->backup);
                                free(new_wa);
                                return retval;
                        }
                }
                else
                {
                        new_wa->backup = NULL;
                }

                /* put new entry in list */
                *p = new_wa;
        }

        /* mark as used, and return the new (reused) area */
        new_wa->free = 0;
        *area = new_wa;

        /* user pointer */
        new_wa->user = area;

        return ERROR_OK;
}

int target_free_working_area_restore(struct target_s *target, working_area_t *area, int restore)
{
        if (area->free)
                return ERROR_OK;

        if (restore&&target->backup_working_area)
        {
                int retval;
                if((retval = target_write_memory(target, area->address, 4, area->size / 4, area->backup)) != ERROR_OK)
                        return retval;
        }

        area->free = 1;

        /* mark user pointer invalid */
        *area->user = NULL;
        area->user = NULL;

        return ERROR_OK;
}

int target_free_working_area(struct target_s *target, working_area_t *area)
{
        return target_free_working_area_restore(target, area, 1);
}

/* free resources and restore memory, if restoring memory fails,
 * free up resources anyway
 */
void target_free_all_working_areas_restore(struct target_s *target, int restore)
{
        working_area_t *c = target->working_areas;

        while (c)
        {
                working_area_t *next = c->next;
                target_free_working_area_restore(target, c, restore);

                if (c->backup)
                        free(c->backup);

                free(c);

                c = next;
        }

        target->working_areas = NULL;
}

void target_free_all_working_areas(struct target_s *target)
{
        target_free_all_working_areas_restore(target, 1);
}

int target_register_commands(struct command_context_s *cmd_ctx)
{

        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_jim(cmd_ctx, "target", jim_target, "configure target" );

        return ERROR_OK;
}

int target_arch_state(struct target_s *target)
{
        int retval;
        if (target==NULL)
        {
                LOG_USER("No target has been configured");
                return ERROR_OK;
        }

        LOG_USER("target state: %s",
                 Jim_Nvp_value2name_simple(nvp_target_state,target->state)->name);

        if (target->state!=TARGET_HALTED)
                return ERROR_OK;

        retval=target->type->arch_state(target);
        return retval;
}

/* Single aligned words are guaranteed to use 16 or 32 bit access
 * mode respectively, otherwise data is handled as quickly as
 * possible
 */
int target_write_buffer(struct target_s *target, u32 address, u32 size, u8 *buffer)
{
        int retval;
        LOG_DEBUG("writing buffer of %i byte at 0x%8.8x", size, address);

        if (!target_was_examined(target))
        {
                LOG_ERROR("Target not examined yet");
                return ERROR_FAIL;
        }

        if (size == 0) {
                return ERROR_OK;
        }

        if ((address + size - 1) < address)
        {
                /* GDB can request this when e.g. PC is 0xfffffffc*/
                LOG_ERROR("address+size wrapped(0x%08x, 0x%08x)", address, size);
                return ERROR_FAIL;
        }

        if (((address % 2) == 0) && (size == 2))
        {
                return target_write_memory(target, address, 2, 1, buffer);
        }

        /* handle unaligned head bytes */
        if (address % 4)
        {
                u32 unaligned = 4 - (address % 4);

                if (unaligned > size)
                        unaligned = size;

                if ((retval = target_write_memory(target, address, 1, unaligned, buffer)) != ERROR_OK)
                        return retval;

                buffer += unaligned;
                address += unaligned;
                size -= unaligned;
        }

        /* handle aligned words */
        if (size >= 4)
        {
                int aligned = size - (size % 4);

                /* use bulk writes above a certain limit. This may have to be changed */
                if (aligned > 128)
                {
                        if ((retval = target->type->bulk_write_memory(target, address, aligned / 4, buffer)) != ERROR_OK)
                                return retval;
                }
                else
                {
                        if ((retval = target_write_memory(target, address, 4, aligned / 4, buffer)) != ERROR_OK)
                                return retval;
                }

                buffer += aligned;
                address += aligned;
                size -= aligned;
        }

        /* handle tail writes of less than 4 bytes */
        if (size > 0)
        {
                if ((retval = target_write_memory(target, address, 1, size, buffer)) != ERROR_OK)
                        return retval;
        }

        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
 */
int target_read_buffer(struct target_s *target, u32 address, u32 size, u8 *buffer)
{
        int retval;
        LOG_DEBUG("reading buffer of %i byte at 0x%8.8x", size, address);

        if (!target_was_examined(target))
        {
                LOG_ERROR("Target not examined yet");
                return ERROR_FAIL;
        }

        if (size == 0) {
                return ERROR_OK;
        }

        if ((address + size - 1) < address)
        {
                /* GDB can request this when e.g. PC is 0xfffffffc*/
                LOG_ERROR("address+size wrapped(0x%08x, 0x%08x)", address, size);
                return ERROR_FAIL;
        }

        if (((address % 2) == 0) && (size == 2))
        {
                return target_read_memory(target, address, 2, 1, buffer);
        }

        /* handle unaligned head bytes */
        if (address % 4)
        {
                u32 unaligned = 4 - (address % 4);

                if (unaligned > size)
                        unaligned = size;

                if ((retval = target_read_memory(target, address, 1, unaligned, buffer)) != ERROR_OK)
                        return retval;

                buffer += unaligned;
                address += unaligned;
                size -= unaligned;
        }

        /* handle aligned words */
        if (size >= 4)
        {
                int aligned = size - (size % 4);

                if ((retval = target_read_memory(target, address, 4, aligned / 4, buffer)) != ERROR_OK)
                        return retval;

                buffer += aligned;
                address += aligned;
                size -= aligned;
        }

        /* handle tail writes of less than 4 bytes */
        if (size > 0)
        {
                if ((retval = target_read_memory(target, address, 1, size, buffer)) != ERROR_OK)
                        return retval;
        }

        return ERROR_OK;
}

int target_checksum_memory(struct target_s *target, u32 address, u32 size, u32* crc)
{
        u8 *buffer;
        int retval;
        u32 i;
        u32 checksum = 0;
        if (!target_was_examined(target))
        {
                LOG_ERROR("Target not examined yet");
                return ERROR_FAIL;
        }

        if ((retval = target->type->checksum_memory(target, address,
                size, &checksum)) != ERROR_OK)
        {
                buffer = malloc(size);
                if (buffer == NULL)
                {
                        LOG_ERROR("error allocating buffer for section (%d bytes)", size);
                        return ERROR_INVALID_ARGUMENTS;
                }
                retval = target_read_buffer(target, address, size, buffer);
                if (retval != ERROR_OK)
                {
                        free(buffer);
                        return retval;
                }

                /* convert to target endianess */
                for (i = 0; i < (size/sizeof(u32)); i++)
                {
                        u32 target_data;
                        target_data = target_buffer_get_u32(target, &buffer[i*sizeof(u32)]);
                        target_buffer_set_u32(target, &buffer[i*sizeof(u32)], target_data);
                }

                retval = image_calculate_checksum( buffer, size, &checksum );
                free(buffer);
        }

        *crc = checksum;

        return retval;
}

int target_blank_check_memory(struct target_s *target, u32 address, u32 size, u32* blank)
{
        int retval;
        if (!target_was_examined(target))
        {
                LOG_ERROR("Target not examined yet");
                return ERROR_FAIL;
        }

        if (target->type->blank_check_memory == 0)
                return ERROR_TARGET_RESOURCE_NOT_AVAILABLE;

        retval = target->type->blank_check_memory(target, address, size, blank);

        return retval;
}

int target_read_u32(struct target_s *target, u32 address, u32 *value)
{
        u8 value_buf[4];
        if (!target_was_examined(target))
        {
                LOG_ERROR("Target not examined yet");
                return ERROR_FAIL;
        }

        int retval = target_read_memory(target, address, 4, 1, value_buf);

        if (retval == ERROR_OK)
        {
                *value = target_buffer_get_u32(target, value_buf);
                LOG_DEBUG("address: 0x%8.8x, value: 0x%8.8x", address, *value);
        }
        else
        {
                *value = 0x0;
                LOG_DEBUG("address: 0x%8.8x failed", address);
        }

        return retval;
}

int target_read_u16(struct target_s *target, u32 address, u16 *value)
{
        u8 value_buf[2];
        if (!target_was_examined(target))
        {
                LOG_ERROR("Target not examined yet");
                return ERROR_FAIL;
        }

        int retval = target_read_memory(target, address, 2, 1, value_buf);

        if (retval == ERROR_OK)
        {
                *value = target_buffer_get_u16(target, value_buf);
                LOG_DEBUG("address: 0x%8.8x, value: 0x%4.4x", address, *value);
        }
        else
        {
                *value = 0x0;
                LOG_DEBUG("address: 0x%8.8x failed", address);
        }

        return retval;
}

int target_read_u8(struct target_s *target, u32 address, u8 *value)
{
        int retval = target_read_memory(target, address, 1, 1, value);
        if (!target_was_examined(target))
        {
                LOG_ERROR("Target not examined yet");
                return ERROR_FAIL;
        }

        if (retval == ERROR_OK)
        {
                LOG_DEBUG("address: 0x%8.8x, value: 0x%2.2x", address, *value);
        }
        else
        {
                *value = 0x0;
                LOG_DEBUG("address: 0x%8.8x failed", address);
        }

        return retval;
}

int target_write_u32(struct target_s *target, u32 address, u32 value)
{
        int retval;
        u8 value_buf[4];
        if (!target_was_examined(target))
        {
                LOG_ERROR("Target not examined yet");
                return ERROR_FAIL;
        }

        LOG_DEBUG("address: 0x%8.8x, value: 0x%8.8x", address, value);

        target_buffer_set_u32(target, value_buf, value);
        if ((retval = target_write_memory(target, address, 4, 1, value_buf)) != ERROR_OK)
        {
                LOG_DEBUG("failed: %i", retval);
        }

        return retval;
}

int target_write_u16(struct target_s *target, u32 address, u16 value)
{
        int retval;
        u8 value_buf[2];
        if (!target_was_examined(target))
        {
                LOG_ERROR("Target not examined yet");
                return ERROR_FAIL;
        }

        LOG_DEBUG("address: 0x%8.8x, value: 0x%8.8x", address, value);

        target_buffer_set_u16(target, value_buf, value);
        if ((retval = target_write_memory(target, address, 2, 1, value_buf)) != ERROR_OK)
        {
                LOG_DEBUG("failed: %i", retval);
        }

        return retval;
}

int target_write_u8(struct target_s *target, u32 address, u8 value)
{
        int retval;
        if (!target_was_examined(target))
        {
                LOG_ERROR("Target not examined yet");
                return ERROR_FAIL;
        }

        LOG_DEBUG("address: 0x%8.8x, value: 0x%2.2x", address, value);

        if ((retval = target_write_memory(target, address, 1, 1, &value)) != ERROR_OK)
        {
                LOG_DEBUG("failed: %i", retval);
        }

        return retval;
}

int target_register_user_commands(struct command_context_s *cmd_ctx)
{
        int retval = ERROR_OK;


        /* script procedures */
        register_command(cmd_ctx, NULL, "profile", handle_profile_command, COMMAND_EXEC, "profiling samples the CPU PC");
        register_jim(cmd_ctx, "ocd_mem2array", jim_mem2array, "read memory and return as a TCL array for script processing <ARRAYNAME> <WIDTH=32/16/8> <ADDRESS> <COUNT>");
        register_jim(cmd_ctx, "ocd_array2mem", jim_array2mem, "convert a TCL array to memory locations and write the values  <ARRAYNAME> <WIDTH=32/16/8> <ADDRESS> <COUNT>");

        register_command(cmd_ctx, NULL, "fast_load_image", handle_fast_load_image_command, COMMAND_ANY,
                        "same args as load_image, image stored in memory - mainly for profiling purposes");

        register_command(cmd_ctx, NULL, "fast_load", handle_fast_load_command, COMMAND_ANY,
                        "loads active fast load image to current target - mainly for profiling purposes");


        register_command(cmd_ctx, NULL, "virt2phys", handle_virt2phys_command, COMMAND_ANY, "translate a virtual address into a physical address");
        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, "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]");
        register_command(cmd_ctx,  NULL, "mdh", handle_md_command, COMMAND_EXEC, "display memory half-words <addr> [count]");
        register_command(cmd_ctx,  NULL, "mdb", handle_md_command, COMMAND_EXEC, "display memory bytes <addr> [count]");

        register_command(cmd_ctx,  NULL, "mww", handle_mw_command, COMMAND_EXEC, "write memory word <addr> <value> [count]");
        register_command(cmd_ctx,  NULL, "mwh", handle_mw_command, COMMAND_EXEC, "write memory half-word <addr> <value> [count]");
        register_command(cmd_ctx,  NULL, "mwb", handle_mw_command, COMMAND_EXEC, "write memory byte <addr> <value> [count]");

        register_command(cmd_ctx,  NULL, "bp", handle_bp_command, COMMAND_EXEC, "set breakpoint <address> <length> [hw]");
        register_command(cmd_ctx,  NULL, "rbp", handle_rbp_command, COMMAND_EXEC, "remove breakpoint <adress>");
        register_command(cmd_ctx,  NULL, "wp", handle_wp_command, COMMAND_EXEC, "set watchpoint <address> <length> <r/w/a> [value] [mask]");
        register_command(cmd_ctx,  NULL, "rwp", handle_rwp_command, COMMAND_EXEC, "remove watchpoint <adress>");

        register_command(cmd_ctx,  NULL, "load_image", handle_load_image_command, COMMAND_EXEC, "load_image <file> <address> ['bin'|'ihex'|'elf'|'s19'] [min_address] [max_length]");
        register_command(cmd_ctx,  NULL, "dump_image", handle_dump_image_command, COMMAND_EXEC, "dump_image <file> <address> <size>");
        register_command(cmd_ctx,  NULL, "verify_image", handle_verify_image_command, COMMAND_EXEC, "verify_image <file> [offset] [type]");
        register_command(cmd_ctx,  NULL, "test_image", handle_test_image_command, COMMAND_EXEC, "test_image <file> [offset] [type]");

        if((retval = target_request_register_commands(cmd_ctx)) != ERROR_OK)
                return retval;
        if((retval = trace_register_commands(cmd_ctx)) != ERROR_OK)
                return retval;

        return retval;
}

static int handle_targets_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc)
{
        target_t *target = all_targets;

        if (argc == 1)
        {
                target = get_target(args[0]);
                if (target == NULL) {
                        command_print(cmd_ctx,"Target: %s is unknown, try one of:\n", args[0] );
                        goto DumpTargets;
                }
                if (!target->tap->enabled) {
                        command_print(cmd_ctx,"Target: TAP %s is disabled, "
                                        "can't be the current target\n",
                                        target->tap->dotted_name);
                        return ERROR_FAIL;
                }

                cmd_ctx->current_target = target->target_number;
                return ERROR_OK;
        }
DumpTargets:

        target = all_targets;
        command_print(cmd_ctx, "    TargetName         Type       Endian TapName            State       ");
        command_print(cmd_ctx, "--  ------------------ ---------- ------ ------------------ ------------");
        while (target)
        {
                const char *state;
                char marker = ' ';

                if (target->tap->enabled)
                        state = Jim_Nvp_value2name_simple(nvp_target_state,
                                        target->state)->name;
                else
                        state = "tap-disabled";

                if (cmd_ctx->current_target == target->target_number)
                        marker = '*';

                /* keep columns lined up to match the headers above */
                command_print(cmd_ctx, "%2d%c %-18s %-10s %-6s %-18s %s",
                                          target->target_number,
                                          marker,
                                          target->cmd_name,
                                          target_get_name(target),
                                          Jim_Nvp_value2name_simple(nvp_target_endian,
                                                                target->endianness)->name,
                                          target->tap->dotted_name,
                                          state);
                target = target->next;
        }

        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;

static int sense_handler(void)
{
        static int prevSrstAsserted = 0;
        static int prevPowerdropout = 0;

        int retval;
        if ((retval=jtag_power_dropout(&powerDropout))!=ERROR_OK)
                return retval;

        int powerRestored;
        powerRestored = prevPowerdropout && !powerDropout;
        if (powerRestored)
        {
                runPowerRestore = 1;
        }

        long long current = timeval_ms();
        static long long lastPower = 0;
        int waitMore = lastPower + 2000 > current;
        if (powerDropout && !waitMore)
        {
                runPowerDropout = 1;
                lastPower = current;
        }

        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)
        {
                runSrstDeasserted = 1;
                lastSrst = current;
        }

        if (!prevSrstAsserted && srstAsserted)
        {
                runSrstAsserted = 1;
        }

        prevSrstAsserted = srstAsserted;
        prevPowerdropout = powerDropout;

        if (srstDeasserted || powerRestored)
        {
                /* 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 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)
        {

                /* 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)
                                return retval;
                }

                target = target->next;
        }

        return retval;
}

static int handle_reg_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc)
{
        target_t *target;
        reg_t *reg = NULL;
        int count = 0;
        char *value;

        LOG_DEBUG("-");

        target = get_current_target(cmd_ctx);

        /* list all available registers for the current target */
        if (argc == 0)
        {
                reg_cache_t *cache = target->reg_cache;

                count = 0;
                while(cache)
                {
                        int i;
                        for (i = 0; i < cache->num_regs; i++)
                        {
                                value = buf_to_str(cache->reg_list[i].value, cache->reg_list[i].size, 16);
                                command_print(cmd_ctx, "(%i) %s (/%i): 0x%s (dirty: %i, valid: %i)", count++, cache->reg_list[i].name, cache->reg_list[i].size, value, cache->reg_list[i].dirty, cache->reg_list[i].valid);
                                free(value);
                        }
                        cache = cache->next;
                }

                return ERROR_OK;
        }

        /* access a single register by its ordinal number */
        if ((args[0][0] >= '0') && (args[0][0] <= '9'))
        {
                unsigned num;
                int retval = parse_uint(args[0], &num);
                if (ERROR_OK != retval)
                        return ERROR_COMMAND_SYNTAX_ERROR;

                reg_cache_t *cache = target->reg_cache;
                count = 0;
                while(cache)
                {
                        int i;
                        for (i = 0; i < cache->num_regs; i++)
                        {
                                if (count++ == (int)num)
                                {
                                        reg = &cache->reg_list[i];
                                        break;
                                }
                        }
                        if (reg)
                                break;
                        cache = cache->next;
                }

                if (!reg)
                {
                        command_print(cmd_ctx, "%i is out of bounds, the current target has only %i registers (0 - %i)", num, count, count - 1);
                        return ERROR_OK;
                }
        } else /* access a single register by its name */
        {
                reg = register_get_by_name(target->reg_cache, args[0], 1);

                if (!reg)
                {
                        command_print(cmd_ctx, "register %s not found in current target", args[0]);
                        return ERROR_OK;
                }
        }

        /* display a register */
        if ((argc == 1) || ((argc == 2) && !((args[1][0] >= '0') && (args[1][0] <= '9'))))
        {
                if ((argc == 2) && (strcmp(args[1], "force") == 0))
                        reg->valid = 0;

                if (reg->valid == 0)
                {
                        reg_arch_type_t *arch_type = register_get_arch_type(reg->arch_type);
                        arch_type->get(reg);
                }
                value = buf_to_str(reg->value, reg->size, 16);
                command_print(cmd_ctx, "%s (/%i): 0x%s", reg->name, reg->size, value);
                free(value);
                return ERROR_OK;
        }

        /* set register value */
        if (argc == 2)
        {
                u8 *buf = malloc(CEIL(reg->size, 8));
                str_to_buf(args[1], strlen(args[1]), buf, reg->size, 0);

                reg_arch_type_t *arch_type = register_get_arch_type(reg->arch_type);
                arch_type->set(reg, buf);

                value = buf_to_str(reg->value, reg->size, 16);
                command_print(cmd_ctx, "%s (/%i): 0x%s", reg->name, reg->size, value);
                free(value);

                free(buf);

                return ERROR_OK;
        }

        command_print(cmd_ctx, "usage: reg <#|name> [value]");

        return ERROR_OK;
}

static int handle_poll_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc)
{
        int retval = ERROR_OK;
        target_t *target = get_current_target(cmd_ctx);

        if (argc == 0)
        {
                command_print(cmd_ctx, "background polling: %s",
                                target_continous_poll ?  "on" : "off");
                if ((retval = target_poll(target)) != ERROR_OK)
                        return retval;
                if ((retval = target_arch_state(target)) != ERROR_OK)
                        return retval;

        }
        else if (argc==1)
        {
                if (strcmp(args[0], "on") == 0)
                {
                        target_continous_poll = 1;
                }
                else if (strcmp(args[0], "off") == 0)
                {
                        target_continous_poll = 0;
                }
                else
                {
                        command_print(cmd_ctx, "arg is \"on\" or \"off\"");
                }
        } else
        {
                return ERROR_COMMAND_SYNTAX_ERROR;
        }

        return retval;
}

static int handle_wait_halt_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc)
{
        if (argc > 1)
                return ERROR_COMMAND_SYNTAX_ERROR;

        unsigned ms = 5000;
        if (1 == argc)
        {
                int retval = parse_uint(args[0], &ms);
                if (ERROR_OK != retval)
                {
                        command_print(cmd_ctx, "usage: %s [seconds]", cmd);
                        return ERROR_COMMAND_SYNTAX_ERROR;
                }
                // convert seconds (given) to milliseconds (needed)
                ms *= 1000;
        }

        target_t *target = get_current_target(cmd_ctx);
        return target_wait_state(target, TARGET_HALTED, ms);
}

/* wait for target state to change. The trick here is to have a low
 * latency for short waits and not to suck up all the CPU time
 * on longer waits.
 *
 * After 500ms, keep_alive() is invoked
 */
int target_wait_state(target_t *target, enum target_state state, int ms)
{
        int retval;
        long long then=0, cur;
        int once=1;

        for (;;)
        {
                if ((retval=target_poll(target))!=ERROR_OK)
                        return retval;
                if (target->state == state)
                {
                        break;
                }
                cur = timeval_ms();
                if (once)
                {
                        once=0;
                        then = timeval_ms();
                        LOG_DEBUG("waiting for target %s...",
                                Jim_Nvp_value2name_simple(nvp_target_state,state)->name);
                }

                if (cur-then>500)
                {
                        keep_alive();
                }

                if ((cur-then)>ms)
                {
                        LOG_ERROR("timed out while waiting for target %s",
                                Jim_Nvp_value2name_simple(nvp_target_state,state)->name);
                        return ERROR_FAIL;
                }
        }

        return ERROR_OK;
}

static int handle_halt_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc)
{
        LOG_DEBUG("-");

        target_t *target = get_current_target(cmd_ctx);
        int retval = target_halt(target);
        if (ERROR_OK != retval)
                return retval;

        if (argc == 1)
        {
                unsigned wait;
                retval = parse_uint(args[0], &wait);
                if (ERROR_OK != retval)
                        return ERROR_COMMAND_SYNTAX_ERROR;
                if (!wait)
                        return ERROR_OK;
        }

        return handle_wait_halt_command(cmd_ctx, cmd, args, argc);
}

static int handle_soft_reset_halt_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc)
{
        target_t *target = get_current_target(cmd_ctx);

        LOG_USER("requesting target halt and executing a soft reset");

        target->type->soft_reset_halt(target);

        return ERROR_OK;
}

static int handle_reset_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc)
{
        if (argc > 1)
                return ERROR_COMMAND_SYNTAX_ERROR;

        enum target_reset_mode reset_mode = RESET_RUN;
        if (argc == 1)
        {
                const Jim_Nvp *n;
                n = Jim_Nvp_name2value_simple( nvp_reset_modes, args[0] );
                if( (n->name == NULL) || (n->value == RESET_UNKNOWN) ){
                        return ERROR_COMMAND_SYNTAX_ERROR;
                }
                reset_mode = n->value;
        }

        /* reset *all* targets */
        return target_process_reset(cmd_ctx, reset_mode);
}


static int handle_resume_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc)
{
        if (argc > 1)
                return ERROR_COMMAND_SYNTAX_ERROR;

        target_t *target = get_current_target(cmd_ctx);
        target_handle_event(target, TARGET_EVENT_OLD_pre_resume);

        /* with no args, resume from current pc, addr = 0,
         * with one arguments, addr = args[0],
         * handle breakpoints, not debugging */
        u32 addr = 0;
        if (argc == 1)
                addr = strtoul(args[0], NULL, 0);

        return target_resume(target, 0, addr, 1, 0);
}

static int handle_step_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc)
{
        if (argc > 1)
                return ERROR_COMMAND_SYNTAX_ERROR;

        LOG_DEBUG("-");

        /* with no args, step from current pc, addr = 0,
         * with one argument addr = args[0],
         * handle breakpoints, debugging */
        u32 addr = 0;
        if (argc == 1)
                addr = strtoul(args[0], NULL, 0);

        target_t *target = get_current_target(cmd_ctx);
        return target->type->step(target, 0, addr, 1);
}

static void handle_md_output(struct command_context_s *cmd_ctx,
                struct target_s *target, u32 address, unsigned size,
                unsigned count, const u8 *buffer)
{
        const unsigned line_bytecnt = 32;
        unsigned line_modulo = line_bytecnt / size;

        char output[line_bytecnt * 4 + 1];
        unsigned output_len = 0;

        const char *value_fmt;
        switch (size) {
        case 4: value_fmt = "%8.8x "; break;
        case 2: value_fmt = "%4.2x "; break;
        case 1: value_fmt = "%2.2x "; break;
        default:
                LOG_ERROR("invalid memory read size: %u", size);
                exit(-1);
        }

        for (unsigned i = 0; i < count; i++)
        {
                if (i % line_modulo == 0)
                {
                        output_len += snprintf(output + output_len,
                                        sizeof(output) - output_len,
                                        "0x%8.8x: ", address + (i*size));
                }

                u32 value=0;
                const u8 *value_ptr = buffer + i * size;
                switch (size) {
                case 4: value = target_buffer_get_u32(target, value_ptr); break;
                case 2: value = target_buffer_get_u16(target, value_ptr); break;
                case 1: value = *value_ptr;
                }
                output_len += snprintf(output + output_len,
                                sizeof(output) - output_len,
                                value_fmt, value);

                if ((i % line_modulo == line_modulo - 1) || (i == count - 1))
                {
                        command_print(cmd_ctx, "%s", output);
                        output_len = 0;
                }
        }
}

static int handle_md_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc)
{
        if (argc < 1)
                return ERROR_COMMAND_SYNTAX_ERROR;

        unsigned size = 0;
        switch (cmd[2]) {
        case 'w': size = 4; break;
        case 'h': size = 2; break;
        case 'b': size = 1; break;
        default: return ERROR_COMMAND_SYNTAX_ERROR;
        }

        u32 address = strtoul(args[0], NULL, 0);

        unsigned count = 1;
        if (argc == 2)
                count = strtoul(args[1], NULL, 0);

        u8 *buffer = calloc(count, size);

        target_t *target = get_current_target(cmd_ctx);
        int retval = target_read_memory(target,
                                address, size, count, buffer);
        if (ERROR_OK == retval)
                handle_md_output(cmd_ctx, target, address, size, count, buffer);

        free(buffer);

        return retval;
}

static int handle_mw_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc)
{
        u32 address = 0;
        u32 value = 0;
        int count = 1;
        int i;
        int wordsize;
        target_t *target = get_current_target(cmd_ctx);
        u8 value_buf[4];

         if ((argc < 2) || (argc > 3))
                return ERROR_COMMAND_SYNTAX_ERROR;

        address = strtoul(args[0], NULL, 0);
        value = strtoul(args[1], NULL, 0);
        if (argc == 3)
                count = strtoul(args[2], NULL, 0);

        switch (cmd[2])
        {
                case 'w':
                        wordsize = 4;
                        target_buffer_set_u32(target, value_buf, value);
                        break;
                case 'h':
                        wordsize = 2;
                        target_buffer_set_u16(target, value_buf, value);
                        break;
                case 'b':
                        wordsize = 1;
                        value_buf[0] = value;
                        break;
                default:
                        return ERROR_COMMAND_SYNTAX_ERROR;
        }
        for (i=0; i<count; i++)
        {
                int retval = target_write_memory(target,
                                address + i * wordsize, wordsize, 1, value_buf);
                if (ERROR_OK != retval)
                        return retval;
                keep_alive();
        }

        return ERROR_OK;

}

static int handle_load_image_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc)
{
        u8 *buffer;
        u32 buf_cnt;
        u32 image_size;
        u32 min_address=0;
        u32 max_address=0xffffffff;
        int i;
        int retval, retvaltemp;

        image_t image;

        duration_t duration;
        char *duration_text;

        target_t *target = get_current_target(cmd_ctx);

        if ((argc < 1)||(argc > 5))
        {
                return ERROR_COMMAND_SYNTAX_ERROR;
        }

        /* a base address isn't always necessary, default to 0x0 (i.e. don't relocate) */
        if (argc >= 2)
        {
                image.base_address_set = 1;
                image.base_address = strtoul(args[1], NULL, 0);
        }
        else
        {
                image.base_address_set = 0;
        }


        image.start_address_set = 0;

        if (argc>=4)
        {
                min_address=strtoul(args[3], NULL, 0);
        }
        if (argc>=5)
        {
                max_address=strtoul(args[4], NULL, 0)+min_address;
        }

        if (min_address>max_address)
        {
                return ERROR_COMMAND_SYNTAX_ERROR;
        }

        duration_start_measure(&duration);

        if (image_open(&image, args[0], (argc >= 3) ? args[2] : NULL) != ERROR_OK)
        {
                return ERROR_OK;
        }

        image_size = 0x0;
        retval = ERROR_OK;
        for (i = 0; i < image.num_sections; i++)
        {
                buffer = malloc(image.sections[i].size);
                if (buffer == NULL)
                {
                        command_print(cmd_ctx, "error allocating buffer for section (%d bytes)", image.sections[i].size);
                        break;
                }

                if ((retval = image_read_section(&image, i, 0x0, image.sections[i].size, buffer, &buf_cnt)) != ERROR_OK)
                {
                        free(buffer);
                        break;
                }

                u32 offset=0;
                u32 length=buf_cnt;

                /* DANGER!!! beware of unsigned comparision here!!! */

                if ((image.sections[i].base_address+buf_cnt>=min_address)&&
                                (image.sections[i].base_address<max_address))
                {
                        if (image.sections[i].base_address<min_address)
                        {
                                /* clip addresses below */
                                offset+=min_address-image.sections[i].base_address;
                                length-=offset;
                        }

                        if (image.sections[i].base_address+buf_cnt>max_address)
                        {
                                length-=(image.sections[i].base_address+buf_cnt)-max_address;
                        }

                        if ((retval = target_write_buffer(target, image.sections[i].base_address+offset, length, buffer+offset)) != ERROR_OK)
                        {
                                free(buffer);
                                break;
                        }
                        image_size += length;
                        command_print(cmd_ctx, "%u byte written at address 0x%8.8x", length, image.sections[i].base_address+offset);
                }

                free(buffer);
        }

        if((retvaltemp = duration_stop_measure(&duration, &duration_text)) != ERROR_OK)
        {
                image_close(&image);
                return retvaltemp;
        }

        if (retval==ERROR_OK)
        {
                command_print(cmd_ctx, "downloaded %u byte in %s", image_size, duration_text);
        }
        free(duration_text);

        image_close(&image);

        return retval;

}

static int handle_dump_image_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc)
{
        fileio_t fileio;

        u32 address;
        u32 size;
        u8 buffer[560];
        int retval=ERROR_OK, retvaltemp;

        duration_t duration;
        char *duration_text;

        target_t *target = get_current_target(cmd_ctx);

        if (argc != 3)
        {
                command_print(cmd_ctx, "usage: dump_image <filename> <address> <size>");
                return ERROR_OK;
        }

        address = strtoul(args[1], NULL, 0);
        size = strtoul(args[2], NULL, 0);

        if (fileio_open(&fileio, args[0], FILEIO_WRITE, FILEIO_BINARY) != ERROR_OK)
        {
                return ERROR_OK;
        }

        duration_start_measure(&duration);

        while (size > 0)
        {
                u32 size_written;
                u32 this_run_size = (size > 560) ? 560 : size;

                retval = target_read_buffer(target, address, this_run_size, buffer);
                if (retval != ERROR_OK)
                {
                        break;
                }

                retval = fileio_write(&fileio, this_run_size, buffer, &size_written);
                if (retval != ERROR_OK)
                {
                        break;
                }

                size -= this_run_size;
                address += this_run_size;
        }

        if((retvaltemp = fileio_close(&fileio)) != ERROR_OK)
                return retvaltemp;

        if((retvaltemp = duration_stop_measure(&duration, &duration_text)) != ERROR_OK)
                return retvaltemp;

        if (retval==ERROR_OK)
        {
                command_print(cmd_ctx, "dumped %lld byte in %s",
                                fileio.size, duration_text);
                free(duration_text);
        }

        return retval;
}

static int handle_verify_image_command_internal(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc, int verify)
{
        u8 *buffer;
        u32 buf_cnt;
        u32 image_size;
        int i;
        int retval, retvaltemp;
        u32 checksum = 0;
        u32 mem_checksum = 0;

        image_t image;

        duration_t duration;
        char *duration_text;

        target_t *target = get_current_target(cmd_ctx);

        if (argc < 1)
        {
                return ERROR_COMMAND_SYNTAX_ERROR;
        }

        if (!target)
        {
                LOG_ERROR("no target selected");
                return ERROR_FAIL;
        }

        duration_start_measure(&duration);

        if (argc >= 2)
        {
                image.base_address_set = 1;
                image.base_address = strtoul(args[1], NULL, 0);
        }
        else
        {
                image.base_address_set = 0;
                image.base_address = 0x0;
        }

        image.start_address_set = 0;

        if ((retval=image_open(&image, args[0], (argc == 3) ? args[2] : NULL)) != ERROR_OK)
        {
                return retval;
        }

        image_size = 0x0;
        retval=ERROR_OK;
        for (i = 0; i < image.num_sections; i++)
        {
                buffer = malloc(image.sections[i].size);
                if (buffer == NULL)
                {
                        command_print(cmd_ctx, "error allocating buffer for section (%d bytes)", image.sections[i].size);
                        break;
                }
                if ((retval = image_read_section(&image, i, 0x0, image.sections[i].size, buffer, &buf_cnt)) != ERROR_OK)
                {
                        free(buffer);
                        break;
                }

                if (verify)
                {
                        /* calculate checksum of image */
                        image_calculate_checksum( buffer, buf_cnt, &checksum );

                        retval = target_checksum_memory(target, image.sections[i].base_address, buf_cnt, &mem_checksum);
                        if( retval != ERROR_OK )
                        {
                                free(buffer);
                                break;
                        }

                        if( checksum != mem_checksum )
                        {
                                /* failed crc checksum, fall back to a binary compare */
                                u8 *data;

                                command_print(cmd_ctx, "checksum mismatch - attempting binary compare");

                                data = (u8*)malloc(buf_cnt);

                                /* Can we use 32bit word accesses? */
                                int size = 1;
                                int count = buf_cnt;
                                if ((count % 4) == 0)
                                {
                                        size *= 4;
                                        count /= 4;
                                }
                                retval = target_read_memory(target, image.sections[i].base_address, size, count, data);
                                if (retval == ERROR_OK)
                                {
                                        u32 t;
                                        for (t = 0; t < buf_cnt; t++)
                                        {
                                                if (data[t] != buffer[t])
                                                {
                                                        command_print(cmd_ctx, "Verify operation failed address 0x%08x. Was 0x%02x instead of 0x%02x\n", t + image.sections[i].base_address, data[t], buffer[t]);
                                                        free(data);
                                                        free(buffer);
                                                        retval=ERROR_FAIL;
                                                        goto done;
                                                }
                                                if ((t%16384)==0)
                                                {
                                                        keep_alive();
                                                }
                                        }
                                }

                                free(data);
                        }
                } else
                {
                        command_print(cmd_ctx, "address 0x%08x length 0x%08x", image.sections[i].base_address, buf_cnt);
                }

                free(buffer);
                image_size += buf_cnt;
        }
done:

        if((retvaltemp = duration_stop_measure(&duration, &duration_text)) != ERROR_OK)
        {
                image_close(&image);
                return retvaltemp;
        }

        if (retval==ERROR_OK)
        {
                command_print(cmd_ctx, "verified %u bytes in %s", image_size, duration_text);
        }
        free(duration_text);

        image_close(&image);

        return retval;
}

static int handle_verify_image_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc)
{
        return handle_verify_image_command_internal(cmd_ctx, cmd, args, argc, 1);
}

static int handle_test_image_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc)
{
        return handle_verify_image_command_internal(cmd_ctx, cmd, args, argc, 0);
}

static int handle_bp_command_list(struct command_context_s *cmd_ctx)
{
        target_t *target = get_current_target(cmd_ctx);
        breakpoint_t *breakpoint = target->breakpoints;
        while (breakpoint)
        {
                if (breakpoint->type == BKPT_SOFT)
                {
                        char* buf = buf_to_str(breakpoint->orig_instr,
                                        breakpoint->length, 16);
                        command_print(cmd_ctx, "0x%8.8x, 0x%x, %i, 0x%s",
                                        breakpoint->address, breakpoint->length,
                                        breakpoint->set, buf);
                        free(buf);
                }
                else
                {
                        command_print(cmd_ctx, "0x%8.8x, 0x%x, %i",
                                        breakpoint->address, breakpoint->length, breakpoint->set);
                }

                breakpoint = breakpoint->next;
        }
        return ERROR_OK;
}

static int handle_bp_command_set(struct command_context_s *cmd_ctx,
                u32 addr, u32 length, int hw)
{
        target_t *target = get_current_target(cmd_ctx);
        int retval = breakpoint_add(target, addr, length, hw);
        if (ERROR_OK == retval)
                command_print(cmd_ctx, "breakpoint set at 0x%8.8x", addr);
        else
                LOG_ERROR("Failure setting breakpoint");
        return retval;
}

static int handle_bp_command(struct command_context_s *cmd_ctx,
                char *cmd, char **args, int argc)
{
        if (argc == 0)
                return handle_bp_command_list(cmd_ctx);

        if (argc < 2 || argc > 3)
        {
                command_print(cmd_ctx, "usage: bp <address> <length> ['hw']");
                return ERROR_COMMAND_SYNTAX_ERROR;
        }

        u32 addr = strtoul(args[0], NULL, 0);
        u32 length = strtoul(args[1], NULL, 0);

        int hw = BKPT_SOFT;
        if (argc == 3)
        {
                if (strcmp(args[2], "hw") == 0)
                        hw = BKPT_HARD;
                else
                        return ERROR_COMMAND_SYNTAX_ERROR;
        }

        return handle_bp_command_set(cmd_ctx, addr, length, hw);
}

static int handle_rbp_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc)
{
        target_t *target = get_current_target(cmd_ctx);

        if (argc > 0)
                breakpoint_remove(target, strtoul(args[0], NULL, 0));

        return ERROR_OK;
}

static int handle_wp_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc)
{
        target_t *target = get_current_target(cmd_ctx);
        int retval;

        if (argc == 0)
        {
                watchpoint_t *watchpoint = target->watchpoints;

                while (watchpoint)
                {
                        command_print(cmd_ctx, "address: 0x%8.8x, len: 0x%8.8x, r/w/a: %i, value: 0x%8.8x, mask: 0x%8.8x", watchpoint->address, watchpoint->length, watchpoint->rw, watchpoint->value, watchpoint->mask);
                        watchpoint = watchpoint->next;
                }
        }
        else if (argc >= 2)
        {
                enum watchpoint_rw type = WPT_ACCESS;
                u32 data_value = 0x0;
                u32 data_mask = 0xffffffff;

                if (argc >= 3)
                {
                        switch(args[2][0])
                        {
                                case 'r':
                                        type = WPT_READ;
                                        break;
                                case 'w':
                                        type = WPT_WRITE;
                                        break;
                                case 'a':
                                        type = WPT_ACCESS;
                                        break;
                                default:
                                        command_print(cmd_ctx, "usage: wp <address> <length> [r/w/a] [value] [mask]");
                                        return ERROR_OK;
                        }
                }
                if (argc >= 4)
                {
                        data_value = strtoul(args[3], NULL, 0);
                }
                if (argc >= 5)
                {
                        data_mask = strtoul(args[4], NULL, 0);
                }

                if ((retval = watchpoint_add(target, strtoul(args[0], NULL, 0),
                                strtoul(args[1], NULL, 0), type, data_value, data_mask)) != ERROR_OK)
                {
                        LOG_ERROR("Failure setting breakpoints");
                }
        }
        else
        {
                command_print(cmd_ctx, "usage: wp <address> <length> [r/w/a] [value] [mask]");
        }

        return ERROR_OK;
}

static int handle_rwp_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc)
{
        if (argc != 1)
                return ERROR_COMMAND_SYNTAX_ERROR;

        target_t *target = get_current_target(cmd_ctx);
        watchpoint_remove(target, strtoul(args[0], NULL, 0));

        return ERROR_OK;
}


/**
 * Translate a virtual address to a physical address.
 *
 * The low-level target implementation must have logged a detailed error
 * which is forwarded to telnet/GDB session.
 */
static int handle_virt2phys_command(command_context_t *cmd_ctx,
                char *cmd, char **args, int argc)
{
        if (argc != 1)
                return ERROR_COMMAND_SYNTAX_ERROR;

        target_t *target = get_current_target(cmd_ctx);
        u32 va = strtoul(args[0], NULL, 0);
        u32 pa;

        int retval = target->type->virt2phys(target, va, &pa);
        if (retval == ERROR_OK)
                command_print(cmd_ctx, "Physical address 0x%08x", pa);

        return retval;
}

static void writeData(FILE *f, const void *data, size_t len)
{
        size_t written = fwrite(data, 1, len, f);
        if (written != len)
                LOG_ERROR("failed to write %zu bytes: %s", len, strerror(errno));
}

static void writeLong(FILE *f, int l)
{
        int i;
        for (i=0; i<4; i++)
        {
                char c=(l>>(i*8))&0xff;
                writeData(f, &c, 1);
        }

}

static void writeString(FILE *f, char *s)
{
        writeData(f, s, strlen(s));
}

/* Dump a gmon.out histogram file. */
static void writeGmon(u32 *samples, u32 sampleNum, char *filename)
{
        u32 i;
        FILE *f=fopen(filename, "w");
        if (f==NULL)
                return;
        writeString(f, "gmon");
        writeLong(f, 0x00000001); /* Version */
        writeLong(f, 0); /* padding */
        writeLong(f, 0); /* padding */
        writeLong(f, 0); /* padding */

        u8 zero = 0;  /* GMON_TAG_TIME_HIST */
        writeData(f, &zero, 1);

        /* figure out bucket size */
        u32 min=samples[0];
        u32 max=samples[0];
        for (i=0; i<sampleNum; i++)
        {
                if (min>samples[i])
                {
                        min=samples[i];
                }
                if (max<samples[i])
                {
                        max=samples[i];
                }
        }

        int addressSpace=(max-min+1);

        static const u32 maxBuckets = 256 * 1024; /* maximum buckets. */
        u32 length = addressSpace;
        if (length > maxBuckets)
        {
                length=maxBuckets;
        }
        int *buckets=malloc(sizeof(int)*length);
        if (buckets==NULL)
        {
                fclose(f);
                return;
        }
        memset(buckets, 0, sizeof(int)*length);
        for (i=0; i<sampleNum;i++)
        {
                u32 address=samples[i];
                long long a=address-min;
                long long b=length-1;
                long long c=addressSpace-1;
                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 */
        writeString(f, "seconds");
        for (i=0; i<(15-strlen("seconds")); i++)
                writeData(f, &zero, 1);
        writeString(f, "s");

        /*append binary memory gmon.out profile_hist_data (profile_hist_data + profile_hist_hdr.hist_size) */

        char *data=malloc(2*length);
        if (data!=NULL)
        {
                for (i=0; i<length;i++)
                {
                        int val;
                        val=buckets[i];
                        if (val>65535)
                        {
                                val=65535;
                        }
                        data[i*2]=val&0xff;
                        data[i*2+1]=(val>>8)&0xff;
                }
                free(buckets);
                writeData(f, data, length * 2);
                free(data);
        } else
        {
                free(buckets);
        }

        fclose(f);
}

/* profiling samples the CPU PC as quickly as OpenOCD is able, which will be used as a random sampling of PC */
static int handle_profile_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc)
{
        target_t *target = get_current_target(cmd_ctx);
        struct timeval timeout, now;

        gettimeofday(&timeout, NULL);
        if (argc!=2)
        {
                return ERROR_COMMAND_SYNTAX_ERROR;
        }
        char *end;
        timeval_add_time(&timeout, strtoul(args[0], &end, 0), 0);
        if (*end)
        {
                return ERROR_OK;
        }

        command_print(cmd_ctx, "Starting profiling. Halting and resuming the target as often as we can...");

        static const int maxSample=10000;
        u32 *samples=malloc(sizeof(u32)*maxSample);
        if (samples==NULL)
                return ERROR_OK;

        int numSamples=0;
        int retval=ERROR_OK;
        /* 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 (;;)
        {
                target_poll(target);
                if (target->state == TARGET_HALTED)
                {
                        u32 t=*((u32 *)reg->value);
                        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. */
                } else if (target->state == TARGET_RUNNING)
                {
                        /* We want to quickly sample the PC. */
                        if((retval = target_halt(target)) != ERROR_OK)
                        {
                                free(samples);
                                return retval;
                        }
                } else
                {
                        command_print(cmd_ctx, "Target not halted or running");
                        retval=ERROR_OK;
                        break;
                }
                if (retval!=ERROR_OK)
                {
                        break;
                }

                gettimeofday(&now, NULL);
                if ((numSamples>=maxSample) || ((now.tv_sec >= timeout.tv_sec) && (now.tv_usec >= timeout.tv_usec)))
                {
                        command_print(cmd_ctx, "Profiling completed. %d samples.", numSamples);
                        if((retval = target_poll(target)) != ERROR_OK)
                        {
                                free(samples);
                                return retval;
                        }
                        if (target->state == TARGET_HALTED)
                        {
                                target_resume(target, 1, 0, 0, 0); /* current pc, addr = 0, do not handle breakpoints, not debugging */
                        }
                        if((retval = target_poll(target)) != ERROR_OK)
                        {
                                free(samples);
                                return retval;
                        }
                        writeGmon(samples, numSamples, args[1]);
                        command_print(cmd_ctx, "Wrote %s", args[1]);
                        break;
                }
        }
        free(samples);

        return ERROR_OK;
}

static int new_int_array_element(Jim_Interp * interp, const char *varname, int idx, u32 val)
{
        char *namebuf;
        Jim_Obj *nameObjPtr, *valObjPtr;
        int result;

        namebuf = alloc_printf("%s(%d)", varname, idx);
        if (!namebuf)
                return JIM_ERR;

        nameObjPtr = Jim_NewStringObj(interp, namebuf, -1);
        valObjPtr = Jim_NewIntObj(interp, val);
        if (!nameObjPtr || !valObjPtr)
        {
                free(namebuf);
                return JIM_ERR;
        }

        Jim_IncrRefCount(nameObjPtr);
        Jim_IncrRefCount(valObjPtr);
        result = Jim_SetVariable(interp, nameObjPtr, valObjPtr);
        Jim_DecrRefCount(interp, nameObjPtr);
        Jim_DecrRefCount(interp, valObjPtr);
        free(namebuf);
        /* printf("%s(%d) <= 0%08x\n", varname, idx, val); */
        return result;
}

static int jim_mem2array(Jim_Interp *interp, int argc, Jim_Obj *const *argv)
{
        command_context_t *context;
        target_t *target;

        context = Jim_GetAssocData(interp, "context");
        if (context == NULL)
        {
                LOG_ERROR("mem2array: no command context");
                return JIM_ERR;
        }
        target = get_current_target(context);
        if (target == NULL)
        {
                LOG_ERROR("mem2array: no current target");
                return JIM_ERR;
        }

        return  target_mem2array(interp, target, argc-1, argv+1);
}

static int target_mem2array(Jim_Interp *interp, target_t *target, int argc, Jim_Obj *const *argv)
{
        long l;
        u32 width;
        int len;
        u32 addr;
        u32 count;
        u32 v;
        const char *varname;
        u8 buffer[4096];
        int  n, e, retval;
        u32 i;

        /* argv[1] = name of array to receive the data
         * argv[2] = desired width
         * argv[3] = memory address
         * argv[4] = count of times to read
         */
        if (argc != 4) {
                Jim_WrongNumArgs(interp, 1, argv, "varname width addr nelems");
                return JIM_ERR;
        }
        varname = Jim_GetString(argv[0], &len);
        /* given "foo" get space for worse case "foo(%d)" .. add 20 */

        e = Jim_GetLong(interp, argv[1], &l);
        width = l;
        if (e != JIM_OK) {
                return e;
        }

        e = Jim_GetLong(interp, argv[2], &l);
        addr = l;
        if (e != JIM_OK) {
                return e;
        }
        e = Jim_GetLong(interp, argv[3], &l);
        len = l;
        if (e != JIM_OK) {
                return e;
        }
        switch (width) {
                case 8:
                        width = 1;
                        break;
                case 16:
                        width = 2;
                        break;
                case 32:
                        width = 4;
                        break;
                default:
                        Jim_SetResult(interp, Jim_NewEmptyStringObj(interp));
                        Jim_AppendStrings( interp, Jim_GetResult(interp), "Invalid width param, must be 8/16/32", NULL );
                        return JIM_ERR;
        }
        if (len == 0) {
                Jim_SetResult(interp, Jim_NewEmptyStringObj(interp));
                Jim_AppendStrings(interp, Jim_GetResult(interp), "mem2array: zero width read?", NULL);
                return JIM_ERR;
        }
        if ((addr + (len * width)) < addr) {
                Jim_SetResult(interp, Jim_NewEmptyStringObj(interp));
                Jim_AppendStrings(interp, Jim_GetResult(interp), "mem2array: addr + len - wraps to zero?", NULL);
                return JIM_ERR;
        }
        /* absurd transfer size? */
        if (len > 65536) {
                Jim_SetResult(interp, Jim_NewEmptyStringObj(interp));
                Jim_AppendStrings(interp, Jim_GetResult(interp), "mem2array: absurd > 64K item request", NULL);
                return JIM_ERR;
        }

        if ((width == 1) ||
                ((width == 2) && ((addr & 1) == 0)) ||
                ((width == 4) && ((addr & 3) == 0))) {
                /* all is well */
        } else {
                char buf[100];
                Jim_SetResult(interp, Jim_NewEmptyStringObj(interp));
                sprintf(buf, "mem2array address: 0x%08x is not aligned for %d byte reads", addr, width);
                Jim_AppendStrings(interp, Jim_GetResult(interp), buf , NULL);
                return JIM_ERR;
        }

        /* Transfer loop */

        /* index counter */
        n = 0;
        /* assume ok */
        e = JIM_OK;
        while (len) {
                /* Slurp... in buffer size chunks */

                count = len; /* in objects.. */
                if (count > (sizeof(buffer)/width)) {
                        count = (sizeof(buffer)/width);
                }

                retval = target_read_memory( target, addr, width, count, buffer );
                if (retval != ERROR_OK) {
                        /* BOO !*/
                        LOG_ERROR("mem2array: Read @ 0x%08x, w=%d, cnt=%d, failed", addr, width, count);
                        Jim_SetResult(interp, Jim_NewEmptyStringObj(interp));
                        Jim_AppendStrings(interp, Jim_GetResult(interp), "mem2array: cannot read memory", NULL);
                        e = JIM_ERR;
                        len = 0;
                } else {
                        v = 0; /* shut up gcc */
                        for (i = 0 ;i < count ;i++, n++) {
                                switch (width) {
                                        case 4:
                                                v = target_buffer_get_u32(target, &buffer[i*width]);
                                                break;
                                        case 2:
                                                v = target_buffer_get_u16(target, &buffer[i*width]);
                                                break;
                                        case 1:
                                                v = buffer[i] & 0x0ff;
                                                break;
                                }
                                new_int_array_element(interp, varname, n, v);
                        }
                        len -= count;
                }
        }

        Jim_SetResult(interp, Jim_NewEmptyStringObj(interp));

        return JIM_OK;
}

static int get_int_array_element(Jim_Interp * interp, const char *varname, int idx, u32 *val)
{
        char *namebuf;
        Jim_Obj *nameObjPtr, *valObjPtr;
        int result;
        long l;

        namebuf = alloc_printf("%s(%d)", varname, idx);
        if (!namebuf)
                return JIM_ERR;

        nameObjPtr = Jim_NewStringObj(interp, namebuf, -1);
        if (!nameObjPtr)
        {
                free(namebuf);
                return JIM_ERR;
        }

        Jim_IncrRefCount(nameObjPtr);
        valObjPtr = Jim_GetVariable(interp, nameObjPtr, JIM_ERRMSG);
        Jim_DecrRefCount(interp, nameObjPtr);
        free(namebuf);
        if (valObjPtr == NULL)
                return JIM_ERR;

        result = Jim_GetLong(interp, valObjPtr, &l);
        /* printf("%s(%d) => 0%08x\n", varname, idx, val); */
        *val = l;
        return result;
}

static int jim_array2mem(Jim_Interp *interp, int argc, Jim_Obj *const *argv)
{
        command_context_t *context;
        target_t *target;

        context = Jim_GetAssocData(interp, "context");
        if (context == NULL){
                LOG_ERROR("array2mem: no command context");
                return JIM_ERR;
        }
        target = get_current_target(context);
        if (target == NULL){
                LOG_ERROR("array2mem: no current target");
                return JIM_ERR;
        }

        return target_array2mem( interp,target, argc-1, argv+1 );
}

static int target_array2mem(Jim_Interp *interp, target_t *target, int argc, Jim_Obj *const *argv)
{
        long l;
        u32 width;
        int len;
        u32 addr;
        u32 count;
        u32 v;
        const char *varname;
        u8 buffer[4096];
        int  n, e, retval;
        u32 i;

        /* argv[1] = name of array to get the data
         * argv[2] = desired width
         * argv[3] = memory address
         * argv[4] = count to write
         */
        if (argc != 4) {
                Jim_WrongNumArgs(interp, 1, argv, "varname width addr nelems");
                return JIM_ERR;
        }
        varname = Jim_GetString(argv[0], &len);
        /* given "foo" get space for worse case "foo(%d)" .. add 20 */

        e = Jim_GetLong(interp, argv[1], &l);
        width = l;
        if (e != JIM_OK) {
                return e;
        }

        e = Jim_GetLong(interp, argv[2], &l);
        addr = l;
        if (e != JIM_OK) {
                return e;
        }
        e = Jim_GetLong(interp, argv[3], &l);
        len = l;
        if (e != JIM_OK) {
                return e;
        }
        switch (width) {
                case 8:
                        width = 1;
                        break;
                case 16:
                        width = 2;
                        break;
                case 32:
                        width = 4;
                        break;
                default:
                        Jim_SetResult(interp, Jim_NewEmptyStringObj(interp));
                        Jim_AppendStrings( interp, Jim_GetResult(interp), "Invalid width param, must be 8/16/32", NULL );
                        return JIM_ERR;
        }
        if (len == 0) {
                Jim_SetResult(interp, Jim_NewEmptyStringObj(interp));
                Jim_AppendStrings(interp, Jim_GetResult(interp), "array2mem: zero width read?", NULL);
                return JIM_ERR;
        }
        if ((addr + (len * width)) < addr) {
                Jim_SetResult(interp, Jim_NewEmptyStringObj(interp));
                Jim_AppendStrings(interp, Jim_GetResult(interp), "array2mem: addr + len - wraps to zero?", NULL);
                return JIM_ERR;
        }
        /* absurd transfer size? */
        if (len > 65536) {
                Jim_SetResult(interp, Jim_NewEmptyStringObj(interp));
                Jim_AppendStrings(interp, Jim_GetResult(interp), "array2mem: absurd > 64K item request", NULL);
                return JIM_ERR;
        }

        if ((width == 1) ||
                ((width == 2) && ((addr & 1) == 0)) ||
                ((width == 4) && ((addr & 3) == 0))) {
                /* all is well */
        } else {
                char buf[100];
                Jim_SetResult(interp, Jim_NewEmptyStringObj(interp));
                sprintf(buf, "array2mem address: 0x%08x is not aligned for %d byte reads", addr, width);
                Jim_AppendStrings(interp, Jim_GetResult(interp), buf , NULL);
                return JIM_ERR;
        }

        /* Transfer loop */

        /* index counter */
        n = 0;
        /* assume ok */
        e = JIM_OK;
        while (len) {
                /* Slurp... in buffer size chunks */

                count = len; /* in objects.. */
                if (count > (sizeof(buffer)/width)) {
                        count = (sizeof(buffer)/width);
                }

                v = 0; /* shut up gcc */
                for (i = 0 ;i < count ;i++, n++) {
                        get_int_array_element(interp, varname, n, &v);
                        switch (width) {
                        case 4:
                                target_buffer_set_u32(target, &buffer[i*width], v);
                                break;
                        case 2:
                                target_buffer_set_u16(target, &buffer[i*width], v);
                                break;
                        case 1:
                                buffer[i] = v & 0x0ff;
                                break;
                        }
                }
                len -= count;

                retval = target_write_memory(target, addr, width, count, buffer);
                if (retval != ERROR_OK) {
                        /* BOO !*/
                        LOG_ERROR("array2mem: Write @ 0x%08x, w=%d, cnt=%d, failed", addr, width, count);
                        Jim_SetResult(interp, Jim_NewEmptyStringObj(interp));
                        Jim_AppendStrings(interp, Jim_GetResult(interp), "array2mem: cannot read memory", NULL);
                        e = JIM_ERR;
                        len = 0;
                }
        }

        Jim_SetResult(interp, Jim_NewEmptyStringObj(interp));

        return JIM_OK;
}

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 );

        target = all_targets;
        while (target){
                target_handle_event( target, e );
                target = target->next;
        }
}

void target_handle_event( target_t *target, enum target_event e )
{
        target_event_action_t *teap;
        int done;

        teap = target->event_action;

        done = 0;
        while( teap ){
                if( teap->event == e ){
                        done = 1;
                        LOG_DEBUG( "target: (%d) %s (%s) event: %d (%s) action: %s\n",
                                           target->target_number,
                                           target->cmd_name,
                                           target_get_name(target),
                                           e,
                                           Jim_Nvp_value2name_simple( nvp_target_event, e )->name,
                                           Jim_GetString( teap->body, NULL ) );
                        if (Jim_EvalObj( interp, teap->body )!=JIM_OK)
                        {
                                Jim_PrintErrorMessage(interp);
                        }
                }
                teap = teap->next;
        }
        if( !done ){
                LOG_DEBUG( "event: %d %s - no action",
                                   e,
                                   Jim_Nvp_value2name_simple( nvp_target_event, e )->name );
        }
}

enum target_cfg_param {
        TCFG_TYPE,
        TCFG_EVENT,
        TCFG_WORK_AREA_VIRT,
        TCFG_WORK_AREA_PHYS,
        TCFG_WORK_AREA_SIZE,
        TCFG_WORK_AREA_BACKUP,
        TCFG_ENDIAN,
        TCFG_VARIANT,
        TCFG_CHAIN_POSITION,
};

static Jim_Nvp nvp_config_opts[] = {
        { .name = "-type",             .value = TCFG_TYPE },
        { .name = "-event",            .value = TCFG_EVENT },
        { .name = "-work-area-virt",   .value = TCFG_WORK_AREA_VIRT },
        { .name = "-work-area-phys",   .value = TCFG_WORK_AREA_PHYS },
        { .name = "-work-area-size",   .value = TCFG_WORK_AREA_SIZE },
        { .name = "-work-area-backup", .value = TCFG_WORK_AREA_BACKUP },
        { .name = "-endian" ,          .value = TCFG_ENDIAN },
        { .name = "-variant",          .value = TCFG_VARIANT },
        { .name = "-chain-position",   .value = TCFG_CHAIN_POSITION },

        { .name = NULL, .value = -1 }
};

static int target_configure( Jim_GetOptInfo *goi, target_t *target )
{
        Jim_Nvp *n;
        Jim_Obj *o;
        jim_wide w;
        char *cp;
        int e;

        /* parse config or cget options ... */
        while( goi->argc > 0 ){
                Jim_SetEmptyResult( goi->interp );
                /* Jim_GetOpt_Debug( goi ); */

                if( target->type->target_jim_configure ){
                        /* target defines a configure function */
                        /* target gets first dibs on parameters */
                        e = (*(target->type->target_jim_configure))( target, goi );
                        if( e == JIM_OK ){
                                /* more? */
                                continue;
                        }
                        if( e == JIM_ERR ){
                                /* An error */
                                return e;
                        }
                        /* otherwise we 'continue' below */
                }
                e = Jim_GetOpt_Nvp( goi, nvp_config_opts, &n );
                if( e != JIM_OK ){
                        Jim_GetOpt_NvpUnknown( goi, nvp_config_opts, 0 );
                        return e;
                }
                switch( n->value ){
                case TCFG_TYPE:
                        /* not setable */
                        if( goi->isconfigure ){
                                Jim_SetResult_sprintf( goi->interp, "not setable: %s", n->name );
                                return JIM_ERR;
                        } else {
                        no_params:
                                if( goi->argc != 0 ){
                                        Jim_WrongNumArgs( goi->interp, goi->argc, goi->argv, "NO PARAMS");
                                        return JIM_ERR;
                                }
                        }
                        Jim_SetResultString( goi->interp, target_get_name(target), -1 );
                        /* loop for more */
                        break;
                case TCFG_EVENT:
                        if( goi->argc == 0 ){
                                Jim_WrongNumArgs( goi->interp, goi->argc, goi->argv, "-event ?event-name? ...");
                                return JIM_ERR;
                        }

                        e = Jim_GetOpt_Nvp( goi, nvp_target_event, &n );
                        if( e != JIM_OK ){
                                Jim_GetOpt_NvpUnknown( goi, nvp_target_event, 1 );
                                return e;
                        }

                        if( goi->isconfigure ){
                                if( goi->argc != 1 ){
                                        Jim_WrongNumArgs( goi->interp, goi->argc, goi->argv, "-event ?event-name? ?EVENT-BODY?");
                                        return JIM_ERR;
                                }
                        } else {
                                if( goi->argc != 0 ){
                                        Jim_WrongNumArgs(goi->interp, goi->argc, goi->argv, "-event ?event-name?");
                                        return JIM_ERR;
                                }
                        }

                        {
                                target_event_action_t *teap;

                                teap = target->event_action;
                                /* replace existing? */
                                while( teap ){
                                        if( teap->event == (enum target_event)n->value ){
                                                break;
                                        }
                                        teap = teap->next;
                                }

                                if( goi->isconfigure ){
                                        if( teap == NULL ){
                                                /* create new */
                                                teap = calloc( 1, sizeof(*teap) );
                                        }
                                        teap->event = n->value;
                                        Jim_GetOpt_Obj( goi, &o );
                                        if( teap->body ){
                                                Jim_DecrRefCount( interp, teap->body );
                                        }
                                        teap->body  = Jim_DuplicateObj( goi->interp, o );
                                        /*
                                         * FIXME:
                                         *     Tcl/TK - "tk events" have a nice feature.
                                         *     See the "BIND" command.
                                         *    We should support that here.
                                         *     You can specify %X and %Y in the event code.
                                         *     The idea is: %T - target name.
                                         *     The idea is: %N - target number
                                         *     The idea is: %E - event name.
                                         */
                                        Jim_IncrRefCount( teap->body );

                                        /* add to head of event list */
                                        teap->next = target->event_action;
                                        target->event_action = teap;
                                        Jim_SetEmptyResult(goi->interp);
                                } else {
                                        /* get */
                                        if( teap == NULL ){
                                                Jim_SetEmptyResult( goi->interp );
                                        } else {
                                                Jim_SetResult( goi->interp, Jim_DuplicateObj( goi->interp, teap->body ) );
                                        }
                                }
                        }
                        /* loop for more */
                        break;

                case TCFG_WORK_AREA_VIRT:
                        if( goi->isconfigure ){
                                target_free_all_working_areas(target);
                                e = Jim_GetOpt_Wide( goi, &w );
                                if( e != JIM_OK ){
                                        return e;
                                }
                                target->working_area_virt = w;
                        } else {
                                if( goi->argc != 0 ){
                                        goto no_params;
                                }
                        }
                        Jim_SetResult( interp, Jim_NewIntObj( goi->interp, target->working_area_virt ) );
                        /* loop for more */
                        break;

                case TCFG_WORK_AREA_PHYS:
                        if( goi->isconfigure ){
                                target_free_all_working_areas(target);
                                e = Jim_GetOpt_Wide( goi, &w );
                                if( e != JIM_OK ){
                                        return e;
                                }
                                target->working_area_phys = w;
                        } else {
                                if( goi->argc != 0 ){
                                        goto no_params;
                                }
                        }
                        Jim_SetResult( interp, Jim_NewIntObj( goi->interp, target->working_area_phys ) );
                        /* loop for more */
                        break;

                case TCFG_WORK_AREA_SIZE:
                        if( goi->isconfigure ){
                                target_free_all_working_areas(target);
                                e = Jim_GetOpt_Wide( goi, &w );
                                if( e != JIM_OK ){
                                        return e;
                                }
                                target->working_area_size = w;
                        } else {
                                if( goi->argc != 0 ){
                                        goto no_params;
                                }
                        }
                        Jim_SetResult( interp, Jim_NewIntObj( goi->interp, target->working_area_size ) );
                        /* loop for more */
                        break;

                case TCFG_WORK_AREA_BACKUP:
                        if( goi->isconfigure ){
                                target_free_all_working_areas(target);
                                e = Jim_GetOpt_Wide( goi, &w );
                                if( e != JIM_OK ){
                                        return e;
                                }
                                /* make this exactly 1 or 0 */
                                target->backup_working_area = (!!w);
                        } else {
                                if( goi->argc != 0 ){
                                        goto no_params;
                                }
                        }
                        Jim_SetResult(interp, Jim_NewIntObj(goi->interp, target->backup_working_area));
                        /* loop for more e*/
                        break;

                case TCFG_ENDIAN:
                        if( goi->isconfigure ){
                                e = Jim_GetOpt_Nvp( goi, nvp_target_endian, &n );
                                if( e != JIM_OK ){
                                        Jim_GetOpt_NvpUnknown( goi, nvp_target_endian, 1 );
                                        return e;
                                }
                                target->endianness = n->value;
                        } else {
                                if( goi->argc != 0 ){
                                        goto no_params;
                                }
                        }
                        n = Jim_Nvp_value2name_simple( nvp_target_endian, target->endianness );
                        if( n->name == NULL ){
                                target->endianness = TARGET_LITTLE_ENDIAN;
                                n = Jim_Nvp_value2name_simple( nvp_target_endian, target->endianness );
                        }
                        Jim_SetResultString( goi->interp, n->name, -1 );
                        /* loop for more */
                        break;

                case TCFG_VARIANT:
                        if( goi->isconfigure ){
                                if( goi->argc < 1 ){
                                        Jim_SetResult_sprintf( goi->interp,
                                                                                   "%s ?STRING?",
                                                                                   n->name );
                                        return JIM_ERR;
                                }
                                if( target->variant ){
                                        free((void *)(target->variant));
                                }
                                e = Jim_GetOpt_String( goi, &cp, NULL );
                                target->variant = strdup(cp);
                        } else {
                                if( goi->argc != 0 ){
                                        goto no_params;
                                }
                        }
                        Jim_SetResultString( goi->interp, target->variant,-1 );
                        /* loop for more */
                        break;
                case TCFG_CHAIN_POSITION:
                        if( goi->isconfigure ){
                                Jim_Obj *o;
                                jtag_tap_t *tap;
                                target_free_all_working_areas(target);
                                e = Jim_GetOpt_Obj( goi, &o );
                                if( e != JIM_OK ){
                                        return e;
                                }
                                tap = jtag_tap_by_jim_obj( goi->interp, o );
                                if( tap == NULL ){
                                        return JIM_ERR;
                                }
                                /* make this exactly 1 or 0 */
                                target->tap = tap;
                        } else {
                                if( goi->argc != 0 ){
                                        goto no_params;
                                }
                        }
                        Jim_SetResultString( interp, target->tap->dotted_name, -1 );
                        /* loop for more e*/
                        break;
                }
        } /* while( goi->argc ) */


                /* done - we return */
        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 )
{
        Jim_GetOptInfo goi;
        jim_wide a,b,c;
        int x,y,z;
        u8  target_buf[32];
        Jim_Nvp *n;
        target_t *target;
        struct command_context_s *cmd_ctx;
        int e;

        enum {
                TS_CMD_CONFIGURE,
                TS_CMD_CGET,

                TS_CMD_MWW, TS_CMD_MWH, TS_CMD_MWB,
                TS_CMD_MDW, TS_CMD_MDH, TS_CMD_MDB,
                TS_CMD_MRW, TS_CMD_MRH, TS_CMD_MRB,
                TS_CMD_MEM2ARRAY, TS_CMD_ARRAY2MEM,
                TS_CMD_EXAMINE,
                TS_CMD_POLL,
                TS_CMD_RESET,
                TS_CMD_HALT,
                TS_CMD_WAITSTATE,
                TS_CMD_EVENTLIST,
                TS_CMD_CURSTATE,
                TS_CMD_INVOKE_EVENT,
        };

        static const Jim_Nvp target_options[] = {
                { .name = "configure", .value = TS_CMD_CONFIGURE },
                { .name = "cget", .value = TS_CMD_CGET },
                { .name = "mww", .value = TS_CMD_MWW },
                { .name = "mwh", .value = TS_CMD_MWH },
                { .name = "mwb", .value = TS_CMD_MWB },
                { .name = "mdw", .value = TS_CMD_MDW },
                { .name = "mdh", .value = TS_CMD_MDH },
                { .name = "mdb", .value = TS_CMD_MDB },
                { .name = "mem2array", .value = TS_CMD_MEM2ARRAY },
                { .name = "array2mem", .value = TS_CMD_ARRAY2MEM },
                { .name = "eventlist", .value = TS_CMD_EVENTLIST },
                { .name = "curstate",  .value = TS_CMD_CURSTATE },

                { .name = "arp_examine", .value = TS_CMD_EXAMINE },
                { .name = "arp_poll", .value = TS_CMD_POLL },
                { .name = "arp_reset", .value = TS_CMD_RESET },
                { .name = "arp_halt", .value = TS_CMD_HALT },
                { .name = "arp_waitstate", .value = TS_CMD_WAITSTATE },
                { .name = "invoke-event", .value = TS_CMD_INVOKE_EVENT },

                { .name = NULL, .value = -1 },
        };

        /* go past the "command" */
        Jim_GetOpt_Setup( &goi, interp, argc-1, argv+1 );

        target = Jim_CmdPrivData( goi.interp );
        cmd_ctx = Jim_GetAssocData(goi.interp, "context");

        /* commands here are in an NVP table */
        e = Jim_GetOpt_Nvp( &goi, target_options, &n );
        if( e != JIM_OK ){
                Jim_GetOpt_NvpUnknown( &goi, target_options, 0 );
                return e;
        }
        /* Assume blank result */
        Jim_SetEmptyResult( goi.interp );

        switch( n->value ){
        case TS_CMD_CONFIGURE:
                if( goi.argc < 2 ){
                        Jim_WrongNumArgs( goi.interp, goi.argc, goi.argv, "missing: -option VALUE ...");
                        return JIM_ERR;
                }
                goi.isconfigure = 1;
                return target_configure( &goi, target );
        case TS_CMD_CGET:
                // some things take params
                if( goi.argc < 1 ){
                        Jim_WrongNumArgs( goi.interp, 0, goi.argv, "missing: ?-option?");
                        return JIM_ERR;
                }
                goi.isconfigure = 0;
                return target_configure( &goi, target );
                break;
        case TS_CMD_MWW:
        case TS_CMD_MWH:
        case TS_CMD_MWB:
                /* argv[0] = cmd
                 * argv[1] = address
                 * argv[2] = data
                 * argv[3] = optional count.
                 */

                if( (goi.argc == 3) || (goi.argc == 4) ){
                        /* all is well */
                } else {
                mwx_error:
                        Jim_SetResult_sprintf( goi.interp, "expected: %s ADDR DATA [COUNT]", n->name );
                        return JIM_ERR;
                }

                e = Jim_GetOpt_Wide( &goi, &a );
                if( e != JIM_OK ){
                        goto mwx_error;
                }

                e = Jim_GetOpt_Wide( &goi, &b );
                if( e != JIM_OK ){
                        goto mwx_error;
                }
                if( goi.argc ){
                        e = Jim_GetOpt_Wide( &goi, &c );
                        if( e != JIM_OK ){
                                goto mwx_error;
                        }
                } else {
                        c = 1;
                }

                switch( n->value ){
                case TS_CMD_MWW:
                        target_buffer_set_u32( target, target_buf, b );
                        b = 4;
                        break;
                case TS_CMD_MWH:
                        target_buffer_set_u16( target, target_buf, b );
                        b = 2;
                        break;
                case TS_CMD_MWB:
                        target_buffer_set_u8( target, target_buf, b );
                        b = 1;
                        break;
                }
                for( x = 0 ; x < c ; x++ ){
                        e = target_write_memory( target, a, b, 1, target_buf );
                        if( e != ERROR_OK ){
                                Jim_SetResult_sprintf( interp, "Error writing @ 0x%08x: %d\n", (int)(a), e );
                                return JIM_ERR;
                        }
                        /* b = width */
                        a = a + b;
                }
                return JIM_OK;
                break;

                /* display */
        case TS_CMD_MDW:
        case TS_CMD_MDH:
        case TS_CMD_MDB:
                /* argv[0] = command
                 * argv[1] = address
                 * argv[2] = optional count
                 */
                if( (goi.argc == 2) || (goi.argc == 3) ){
                        Jim_SetResult_sprintf( goi.interp, "expected: %s ADDR [COUNT]", n->name );
                        return JIM_ERR;
                }
                e = Jim_GetOpt_Wide( &goi, &a );
                if( e != JIM_OK ){
                        return JIM_ERR;
                }
                if( goi.argc ){
                        e = Jim_GetOpt_Wide( &goi, &c );
                        if( e != JIM_OK ){
                                return JIM_ERR;
                        }
                } else {
                        c = 1;
                }
                b = 1; /* shut up gcc */
                switch( n->value ){
                case TS_CMD_MDW:
                        b =  4;
                        break;
                case TS_CMD_MDH:
                        b = 2;
                        break;
                case TS_CMD_MDB:
                        b = 1;
                        break;
                }

                /* convert to "bytes" */
                c = c * b;
                /* count is now in 'BYTES' */
                while( c > 0 ){
                        y = c;
                        if( y > 16 ){
                                y = 16;
                        }
                        e = target_read_memory( target, a, b, y / b, target_buf );
                        if( e != ERROR_OK ){
                                Jim_SetResult_sprintf( interp, "error reading target @ 0x%08lx", (int)(a) );
                                return JIM_ERR;
                        }

                        Jim_fprintf( interp, interp->cookie_stdout, "0x%08x ", (int)(a) );
                        switch( b ){
                        case 4:
                                for( x = 0 ; (x < 16) && (x < y) ; x += 4 ){
                                        z = target_buffer_get_u32( target, &(target_buf[ x * 4 ]) );
                                        Jim_fprintf( interp, interp->cookie_stdout, "%08x ", (int)(z) );
                                }
                                for( ; (x < 16) ; x += 4 ){
                                        Jim_fprintf( interp, interp->cookie_stdout, "         " );
                                }
                                break;
                        case 2:
                                for( x = 0 ; (x < 16) && (x < y) ; x += 2 ){
                                        z = target_buffer_get_u16( target, &(target_buf[ x * 2 ]) );
                                        Jim_fprintf( interp, interp->cookie_stdout, "%04x ", (int)(z) );
                                }
                                for( ; (x < 16) ; x += 2 ){
                                        Jim_fprintf( interp, interp->cookie_stdout, "     " );
                                }
                                break;
                        case 1:
                        default:
                                for( x = 0 ; (x < 16) && (x < y) ; x += 1 ){
                                        z = target_buffer_get_u8( target, &(target_buf[ x * 4 ]) );
                                        Jim_fprintf( interp, interp->cookie_stdout, "%02x ", (int)(z) );
                                }
                                for( ; (x < 16) ; x += 1 ){
                                        Jim_fprintf( interp, interp->cookie_stdout, "   " );
                                }
                                break;
                        }
                        /* ascii-ify the bytes */
                        for( x = 0 ; x < y ; x++ ){
                                if( (target_buf[x] >= 0x20) &&
                                        (target_buf[x] <= 0x7e) ){
                                        /* good */
                                } else {
                                        /* smack it */
                                        target_buf[x] = '.';
                                }
                        }
                        /* space pad  */
                        while( x < 16 ){
                                target_buf[x] = ' ';
                                x++;
                        }
                        /* terminate */
                        target_buf[16] = 0;
                        /* print - with a newline */
                        Jim_fprintf( interp, interp->cookie_stdout, "%s\n", target_buf );
                        /* NEXT... */
                        c -= 16;
                        a += 16;
                }
                return JIM_OK;
        case TS_CMD_MEM2ARRAY:
                return target_mem2array( goi.interp, target, goi.argc, goi.argv );
                break;
        case TS_CMD_ARRAY2MEM:
                return target_array2mem( goi.interp, target, goi.argc, goi.argv );
                break;
        case TS_CMD_EXAMINE:
                if( goi.argc ){
                        Jim_WrongNumArgs( goi.interp, 2, argv, "[no parameters]");
                        return JIM_ERR;
                }
                if (!target->tap->enabled)
                        goto err_tap_disabled;
                e = target->type->examine( target );
                if( e != ERROR_OK ){
                        Jim_SetResult_sprintf( interp, "examine-fails: %d", e );
                        return JIM_ERR;
                }
                return JIM_OK;
        case TS_CMD_POLL:
                if( goi.argc ){
                        Jim_WrongNumArgs( goi.interp, 2, argv, "[no parameters]");
                        return JIM_ERR;
                }
                if (!target->tap->enabled)
                        goto err_tap_disabled;
                if( !(target_was_examined(target)) ){
                        e = ERROR_TARGET_NOT_EXAMINED;
                } else {
                        e = target->type->poll( target );
                }
                if( e != ERROR_OK ){
                        Jim_SetResult_sprintf( interp, "poll-fails: %d", e );
                        return JIM_ERR;
                } else {
                        return JIM_OK;
                }
                break;
        case TS_CMD_RESET:
                if( goi.argc != 2 ){
                        Jim_WrongNumArgs( interp, 2, argv, "t|f|assert|deassert BOOL");
                        return JIM_ERR;
                }
                e = Jim_GetOpt_Nvp( &goi, nvp_assert, &n );
                if( e != JIM_OK ){
                        Jim_GetOpt_NvpUnknown( &goi, nvp_assert, 1 );
                        return e;
                }
                /* the halt or not param */
                e = Jim_GetOpt_Wide( &goi, &a);
                if( e != JIM_OK ){
                        return e;
                }
                if (!target->tap->enabled)
                        goto err_tap_disabled;
                /* determine if we should halt or not. */
                target->reset_halt = !!a;
                /* When this happens - all workareas are invalid. */
                target_free_all_working_areas_restore(target, 0);

                /* do the assert */
                if( n->value == NVP_ASSERT ){
                        target->type->assert_reset( target );
                } else {
                        target->type->deassert_reset( target );
                }
                return JIM_OK;
        case TS_CMD_HALT:
                if( goi.argc ){
                        Jim_WrongNumArgs( goi.interp, 0, argv, "halt [no parameters]");
                        return JIM_ERR;
                }
                if (!target->tap->enabled)
                        goto err_tap_disabled;
                target->type->halt( target );
                return JIM_OK;
        case TS_CMD_WAITSTATE:
                /* params:  <name>  statename timeoutmsecs */
                if( goi.argc != 2 ){
                        Jim_SetResult_sprintf( goi.interp, "%s STATENAME TIMEOUTMSECS", n->name );
                        return JIM_ERR;
                }
                e = Jim_GetOpt_Nvp( &goi, nvp_target_state, &n );
                if( e != JIM_OK ){
                        Jim_GetOpt_NvpUnknown( &goi, nvp_target_state,1 );
                        return e;
                }
                e = Jim_GetOpt_Wide( &goi, &a );
                if( e != JIM_OK ){
                        return e;
                }
                if (!target->tap->enabled)
                        goto err_tap_disabled;
                e = target_wait_state( target, n->value, a );
                if( e != ERROR_OK ){
                        Jim_SetResult_sprintf( goi.interp,
                                                                   "target: %s wait %s fails (%d) %s",
                                                                   target->cmd_name,
                                                                   n->name,
                                                                   e, target_strerror_safe(e) );
                        return JIM_ERR;
                } else {
                        return JIM_OK;
                }
        case TS_CMD_EVENTLIST:
                /* List for human, Events defined for this target.
                 * scripts/programs should use 'name cget -event NAME'
                 */
                {
                        target_event_action_t *teap;
                        teap = target->event_action;
                        command_print( cmd_ctx, "Event actions for target (%d) %s\n",
                                                   target->target_number,
                                                   target->cmd_name );
                        command_print( cmd_ctx, "%-25s | Body", "Event");
                        command_print( cmd_ctx, "------------------------- | ----------------------------------------");
                        while( teap ){
                                command_print( cmd_ctx,
                                                           "%-25s | %s",
                                                           Jim_Nvp_value2name_simple( nvp_target_event, teap->event )->name,
                                                           Jim_GetString( teap->body, NULL ) );
                                teap = teap->next;
                        }
                        command_print( cmd_ctx, "***END***");
                        return JIM_OK;
                }
        case TS_CMD_CURSTATE:
                if( goi.argc != 0 ){
                        Jim_WrongNumArgs( goi.interp, 0, argv, "[no parameters]");
                        return JIM_ERR;
                }
                Jim_SetResultString( goi.interp,
                                                         Jim_Nvp_value2name_simple(nvp_target_state,target->state)->name,-1);
                return JIM_OK;
        case TS_CMD_INVOKE_EVENT:
                if( goi.argc != 1 ){
                        Jim_SetResult_sprintf( goi.interp, "%s ?EVENTNAME?",n->name);
                        return JIM_ERR;
                }
                e = Jim_GetOpt_Nvp( &goi, nvp_target_event, &n );
                if( e != JIM_OK ){
                        Jim_GetOpt_NvpUnknown( &goi, nvp_target_event, 1 );
                        return e;
                }
                target_handle_event( target, n->value );
                return JIM_OK;
        }
        return JIM_ERR;

err_tap_disabled:
        Jim_SetResult_sprintf(interp, "[TAP is disabled]");
        return JIM_ERR;
}

static int target_create( Jim_GetOptInfo *goi )
{
        Jim_Obj *new_cmd;
        Jim_Cmd *cmd;
        const char *cp;
        char *cp2;
        int e;
        int x;
        target_t *target;
        struct command_context_s *cmd_ctx;

        cmd_ctx = Jim_GetAssocData(goi->interp, "context");
        if( goi->argc < 3 ){
                Jim_WrongNumArgs( goi->interp, 1, goi->argv, "?name? ?type? ..options...");
                return JIM_ERR;
        }

        /* COMMAND */
        Jim_GetOpt_Obj( goi, &new_cmd );
        /* does this command exist? */
        cmd = Jim_GetCommand( goi->interp, new_cmd, JIM_ERRMSG );
        if( cmd ){
                cp = Jim_GetString( new_cmd, NULL );
                Jim_SetResult_sprintf(goi->interp, "Command/target: %s Exists", cp);
                return JIM_ERR;
        }

        /* TYPE */
        e = Jim_GetOpt_String( goi, &cp2, NULL );
        cp = cp2;
        /* now does target type exist */
        for( x = 0 ; target_types[x] ; x++ ){
                if( 0 == strcmp( cp, target_types[x]->name ) ){
                        /* found */
                        break;
                }
        }
        if( target_types[x] == NULL ){
                Jim_SetResult_sprintf( goi->interp, "Unknown target type %s, try one of ", cp );
                for( x = 0 ; target_types[x] ; x++ ){
                        if( target_types[x+1] ){
                                Jim_AppendStrings( goi->interp,
                                                                   Jim_GetResult(goi->interp),
                                                                   target_types[x]->name,
                                                                   ", ", NULL);
                        } else {
                                Jim_AppendStrings( goi->interp,
                                                                   Jim_GetResult(goi->interp),
                                                                   " or ",
                                                                   target_types[x]->name,NULL );
                        }
                }
                return JIM_ERR;
        }

        /* Create it */
        target = calloc(1,sizeof(target_t));
        /* set target number */
        target->target_number = new_target_number();

        /* allocate memory for each unique target type */
        target->type = (target_type_t*)calloc(1,sizeof(target_type_t));

        memcpy( target->type, target_types[x], sizeof(target_type_t));

        /* will be set by "-endian" */
        target->endianness = TARGET_ENDIAN_UNKNOWN;

        target->working_area        = 0x0;
        target->working_area_size   = 0x0;
        target->working_areas       = NULL;
        target->backup_working_area = 0;

        target->state               = TARGET_UNKNOWN;
        target->debug_reason        = DBG_REASON_UNDEFINED;
        target->reg_cache           = NULL;
        target->breakpoints         = NULL;
        target->watchpoints         = NULL;
        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;
        target->trace_info->trace_points_size        = 0;
        target->trace_info->trace_points             = NULL;
        target->trace_info->trace_history_size       = 0;
        target->trace_info->trace_history            = NULL;
        target->trace_info->trace_history_pos        = 0;
        target->trace_info->trace_history_overflowed = 0;

        target->dbgmsg          = NULL;
        target->dbg_msg_enabled = 0;

        target->endianness = TARGET_ENDIAN_UNKNOWN;

        /* Do the rest as "configure" options */
        goi->isconfigure = 1;
        e = target_configure( goi, target);

        if (target->tap == NULL)
        {
                Jim_SetResultString( interp, "-chain-position required when creating target", -1);
                e=JIM_ERR;
        }

        if( e != JIM_OK ){
                free( target->type );
                free( target );
                return e;
        }

        if( target->endianness == TARGET_ENDIAN_UNKNOWN ){
                /* default endian to little if not specified */
                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 );
        }
        if( target->type->target_create ){
                (*(target->type->target_create))( target, goi->interp );
        }

        /* append to end of list */
        {
                target_t **tpp;
                tpp = &(all_targets);
                while( *tpp ){
                        tpp = &( (*tpp)->next );
                }
                *tpp = target;
        }

        cp = Jim_GetString( new_cmd, NULL );
        target->cmd_name = strdup(cp);

        /* now - create the new target name command */
        e = Jim_CreateCommand( goi->interp,
                                                   /* name */
                                                   cp,
                                                   tcl_target_func, /* C function */
                                                   target, /* private data */
                                                   NULL ); /* no del proc */

        return e;
}

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;
        target_t *target;
        Jim_GetOptInfo goi;
        enum tcmd {
                /* TG = target generic */
                TG_CMD_CREATE,
                TG_CMD_TYPES,
                TG_CMD_NAMES,
                TG_CMD_CURRENT,
                TG_CMD_NUMBER,
                TG_CMD_COUNT,
        };
        const char *target_cmds[] = {
                "create", "types", "names", "current", "number",
                "count",
                NULL /* terminate */
        };

        LOG_DEBUG("Target command params:");
        LOG_DEBUG("%s", Jim_Debug_ArgvString(interp, argc, argv));

        cmd_ctx = Jim_GetAssocData( interp, "context" );

        Jim_GetOpt_Setup( &goi, interp, argc-1, argv+1 );

        if( goi.argc == 0 ){
                Jim_WrongNumArgs(interp, 1, argv, "missing: command ...");
                return JIM_ERR;
        }

        /* Jim_GetOpt_Debug( &goi ); */
        r = Jim_GetOpt_Enum( &goi, target_cmds, &x   );
        if( r != JIM_OK ){
                return r;
        }

        switch(x){
        default:
                Jim_Panic(goi.interp,"Why am I here?");
                return JIM_ERR;
        case TG_CMD_CURRENT:
                if( goi.argc != 0 ){
                        Jim_WrongNumArgs( goi.interp, 1, goi.argv, "Too many parameters");
                        return JIM_ERR;
                }
                Jim_SetResultString( goi.interp, get_current_target( cmd_ctx )->cmd_name, -1 );
                return JIM_OK;
        case TG_CMD_TYPES:
                if( goi.argc != 0 ){
                        Jim_WrongNumArgs( goi.interp, 1, goi.argv, "Too many parameters" );
                        return JIM_ERR;
                }
                Jim_SetResult( goi.interp, Jim_NewListObj( goi.interp, NULL, 0 ) );
                for( x = 0 ; target_types[x] ; x++ ){
                        Jim_ListAppendElement( goi.interp,
                                                                   Jim_GetResult(goi.interp),
                                                                   Jim_NewStringObj( goi.interp, target_types[x]->name, -1 ) );
                }
                return JIM_OK;
        case TG_CMD_NAMES:
                if( goi.argc != 0 ){
                        Jim_WrongNumArgs( goi.interp, 1, goi.argv, "Too many parameters" );
                        return JIM_ERR;
                }
                Jim_SetResult( goi.interp, Jim_NewListObj( goi.interp, NULL, 0 ) );
                target = all_targets;
                while( target ){
                        Jim_ListAppendElement( goi.interp,
                                                                   Jim_GetResult(goi.interp),
                                                                   Jim_NewStringObj( goi.interp, target->cmd_name, -1 ) );
                        target = target->next;
                }
                return JIM_OK;
        case TG_CMD_CREATE:
                if( goi.argc < 3 ){
                        Jim_WrongNumArgs( goi.interp, goi.argc, goi.argv, "?name  ... config options ...");
                        return JIM_ERR;
                }
                return target_create( &goi );
                break;
        case TG_CMD_NUMBER:
                if( goi.argc != 1 ){
                        Jim_SetResult_sprintf( goi.interp, "expected: target number ?NUMBER?");
                        return JIM_ERR;
                }
                e = Jim_GetOpt_Wide( &goi, &w );
                if( e != JIM_OK ){
                        return JIM_ERR;
                }
                {
                        target_t *t;
                        t = get_target_by_num(w);
                        if( t == NULL ){
                                Jim_SetResult_sprintf( goi.interp,"Target: number %d does not exist", (int)(w));
                                return JIM_ERR;
                        }
                        Jim_SetResultString( goi.interp, t->cmd_name, -1 );
                        return JIM_OK;
                }
        case TG_CMD_COUNT:
                if( goi.argc != 0 ){
                        Jim_WrongNumArgs( goi.interp, 0, goi.argv, "<no parameters>");
                        return JIM_ERR;
                }
                Jim_SetResult( goi.interp,
                                           Jim_NewIntObj( goi.interp, max_target_number()));
                return JIM_OK;
        }

        return JIM_ERR;
}


struct FastLoad
{
        u32 address;
        u8 *data;
        int length;

};

static int fastload_num;
static struct FastLoad *fastload;

static void free_fastload(void)
{
        if (fastload!=NULL)
        {
                int i;
                for (i=0; i<fastload_num; i++)
                {
                        if (fastload[i].data)
                                free(fastload[i].data);
                }
                free(fastload);
                fastload=NULL;
        }
}




static int handle_fast_load_image_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc)
{
        u8 *buffer;
        u32 buf_cnt;
        u32 image_size;
        u32 min_address=0;
        u32 max_address=0xffffffff;
        int i;
        int retval;

        image_t image;

        duration_t duration;
        char *duration_text;

        if ((argc < 1)||(argc > 5))
        {
                return ERROR_COMMAND_SYNTAX_ERROR;
        }

        /* a base address isn't always necessary, default to 0x0 (i.e. don't relocate) */
        if (argc >= 2)
        {
                image.base_address_set = 1;
                image.base_address = strtoul(args[1], NULL, 0);
        }
        else
        {
                image.base_address_set = 0;
        }


        image.start_address_set = 0;

        if (argc>=4)
        {
                min_address=strtoul(args[3], NULL, 0);
        }
        if (argc>=5)
        {
                max_address=strtoul(args[4], NULL, 0)+min_address;
        }

        if (min_address>max_address)
        {
                return ERROR_COMMAND_SYNTAX_ERROR;
        }

        duration_start_measure(&duration);

        if (image_open(&image, args[0], (argc >= 3) ? args[2] : NULL) != ERROR_OK)
        {
                return ERROR_OK;
        }

        image_size = 0x0;
        retval = ERROR_OK;
        fastload_num=image.num_sections;
        fastload=(struct FastLoad *)malloc(sizeof(struct FastLoad)*image.num_sections);
        if (fastload==NULL)
        {
                image_close(&image);
                return ERROR_FAIL;
        }
        memset(fastload, 0, sizeof(struct FastLoad)*image.num_sections);
        for (i = 0; i < image.num_sections; i++)
        {
                buffer = malloc(image.sections[i].size);
                if (buffer == NULL)
                {
                        command_print(cmd_ctx, "error allocating buffer for section (%d bytes)", image.sections[i].size);
                        break;
                }

                if ((retval = image_read_section(&image, i, 0x0, image.sections[i].size, buffer, &buf_cnt)) != ERROR_OK)
                {
                        free(buffer);
                        break;
                }

                u32 offset=0;
                u32 length=buf_cnt;


                /* DANGER!!! beware of unsigned comparision here!!! */

                if ((image.sections[i].base_address+buf_cnt>=min_address)&&
                                (image.sections[i].base_address<max_address))
                {
                        if (image.sections[i].base_address<min_address)
                        {
                                /* clip addresses below */
                                offset+=min_address-image.sections[i].base_address;
                                length-=offset;
                        }

                        if (image.sections[i].base_address+buf_cnt>max_address)
                        {
                                length-=(image.sections[i].base_address+buf_cnt)-max_address;
                        }

                        fastload[i].address=image.sections[i].base_address+offset;
                        fastload[i].data=malloc(length);
                        if (fastload[i].data==NULL)
                        {
                                free(buffer);
                                break;
                        }
                        memcpy(fastload[i].data, buffer+offset, length);
                        fastload[i].length=length;

                        image_size += length;
                        command_print(cmd_ctx, "%u byte written at address 0x%8.8x", length, image.sections[i].base_address+offset);
                }

                free(buffer);
        }

        duration_stop_measure(&duration, &duration_text);
        if (retval==ERROR_OK)
        {
                command_print(cmd_ctx, "Loaded %u bytes in %s", image_size, duration_text);
                command_print(cmd_ctx, "NB!!! image has not been loaded to target, issue a subsequent 'fast_load' to do so.");
        }
        free(duration_text);

        image_close(&image);

        if (retval!=ERROR_OK)
        {
                free_fastload();
        }

        return retval;
}

static int handle_fast_load_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc)
{
        if (argc>0)
                return ERROR_COMMAND_SYNTAX_ERROR;
        if (fastload==NULL)
        {
                LOG_ERROR("No image in memory");
                return ERROR_FAIL;
        }
        int i;
        int ms=timeval_ms();
        int size=0;
        int retval=ERROR_OK;
        for (i=0; i<fastload_num;i++)
        {
                target_t *target = get_current_target(cmd_ctx);
                command_print(cmd_ctx, "Write to 0x%08x, length 0x%08x", fastload[i].address, fastload[i].length);
                if (retval==ERROR_OK)
                {
                        retval = target_write_buffer(target, fastload[i].address, fastload[i].length, fastload[i].data);
                }
                size+=fastload[i].length;
        }
        int after=timeval_ms();
        command_print(cmd_ctx, "Loaded image %f kBytes/s", (float)(size/1024.0)/((float)(after-ms)/1000.0));
        return retval;
}