watchpoint_add() cleanup
[openocd.git] / src / target / target.c
index 5433316a879eabf2cb9e1fb62c236782d51bdbaf..55fc2c8237ead31961d1a83aa5583bbcb2e5aeb9 100644 (file)
@@ -2,7 +2,7 @@
  *   Copyright (C) 2005 by Dominic Rath                                    *
  *   Dominic.Rath@gmx.de                                                   *
  *                                                                         *
- *   Copyright (C) 2007,2008 Øyvind Harboe                                 *
+ *   Copyright (C) 2007-2009 Øyvind Harboe                                 *
  *   oyvind.harboe@zylin.com                                               *
  *                                                                         *
  *   Copyright (C) 2008, Duane Ellis                                       *
@@ -69,8 +69,9 @@ static int handle_fast_load_image_command(struct command_context_s *cmd_ctx, cha
 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_mcrmrc(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 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);
@@ -84,6 +85,7 @@ extern target_type_t arm966e_target;
 extern target_type_t arm926ejs_target;
 extern target_type_t fa526_target;
 extern target_type_t feroceon_target;
+extern target_type_t dragonite_target;
 extern target_type_t xscale_target;
 extern target_type_t cortexm3_target;
 extern target_type_t cortexa8_target;
@@ -101,6 +103,7 @@ target_type_t *target_types[] =
        &arm926ejs_target,
        &fa526_target,
        &feroceon_target,
+       &dragonite_target,
        &xscale_target,
        &cortexm3_target,
        &cortexa8_target,
@@ -139,12 +142,12 @@ const Jim_Nvp nvp_error_target[] = {
        { .value = -1, .name = NULL }
 };
 
-const char *target_strerror_safe( int err )
+const char *target_strerror_safe(int err)
 {
        const Jim_Nvp *n;
 
-       n = Jim_Nvp_value2name_simple( nvp_error_target, err );
-       if ( n->name == NULL ){
+       n = Jim_Nvp_value2name_simple(nvp_error_target, err);
+       if (n->name == NULL) {
                return "unknown";
        } else {
                return n->name;
@@ -155,7 +158,7 @@ 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_GDB_HALT, .name = "gdb-halt" },
        { .value = TARGET_EVENT_HALTED, .name = "halted" },
        { .value = TARGET_EVENT_RESUMED, .name = "resumed" },
        { .value = TARGET_EVENT_RESUME_START, .name = "resume-start" },
@@ -237,20 +240,16 @@ const Jim_Nvp nvp_reset_modes[] = {
        { .name = NULL     , .value = -1 },
 };
 
-static int max_target_number(void)
+const char *
+target_state_name( target_t *t )
 {
-       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;
+       const char *cp;
+       cp = Jim_Nvp_value2name_simple(nvp_target_state, t->state)->name;
+       if( !cp ){
+               LOG_ERROR("Invalid target state: %d", (int)(t->state));
+               cp = "(*BUG*unknown*BUG*)";
        }
-       return x;
+       return cp;
 }
 
 /* determine the number of the new target */
@@ -262,8 +261,8 @@ static int new_target_number(void)
        /* number is 0 based */
        x = -1;
        t = all_targets;
-       while (t){
-               if ( x < t->target_number ){
+       while (t) {
+               if (x < t->target_number) {
                        x = t->target_number;
                }
                t = t->next;
@@ -271,8 +270,6 @@ static int new_target_number(void)
        return x + 1;
 }
 
-static int target_continuous_poll = 1;
-
 /* read a uint32_t from a buffer in target memory endianness */
 uint32_t target_buffer_get_u32(target_t *target, const uint8_t *buffer)
 {
@@ -334,14 +331,19 @@ target_t *get_target(const char *id)
                        return target;
        }
 
+       /* It's OK to remove this fallback sometime after August 2010 or so */
+
        /* 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)
+               if (target->target_number == (int)num) {
+                       LOG_WARNING("use '%s' as target identifier, not '%u'",
+                                       target->cmd_name, num);
                        return target;
+               }
        }
 
        return NULL;
@@ -352,8 +354,8 @@ static target_t *get_target_by_num(int num)
 {
        target_t *target = all_targets;
 
-       while (target){
-               if ( target->target_number == num ){
+       while (target) {
+               if (target->target_number == num) {
                        return target;
                }
                target = target->next;
@@ -362,11 +364,6 @@ static target_t *get_target_by_num(int num)
        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);
@@ -382,24 +379,57 @@ target_t* get_current_target(command_context_t *cmd_ctx)
 
 int target_poll(struct target_s *target)
 {
+       int retval;
+
        /* 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);
+
+       retval = target->type->poll(target);
+       if (retval != ERROR_OK)
+               return retval;
+
+       if (target->halt_issued)
+       {
+               if (target->state == TARGET_HALTED)
+               {
+                       target->halt_issued = false;
+               } else
+               {
+                       long long t = timeval_ms() - target->halt_issued_time;
+                       if (t>1000)
+                       {
+                               target->halt_issued = false;
+                               LOG_INFO("Halt timed out, wake up GDB.");
+                               target_call_event_callbacks(target, TARGET_EVENT_GDB_HALT);
+                       }
+               }
+       }
+
+       return ERROR_OK;
 }
 
 int target_halt(struct target_s *target)
 {
+       int retval;
        /* 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);
+
+       retval = target->type->halt(target);
+       if (retval != ERROR_OK)
+               return retval;
+
+       target->halt_issued = true;
+       target->halt_issued_time = timeval_ms();
+
+       return ERROR_OK;
 }
 
 int target_resume(struct target_s *target, int current, uint32_t address, int handle_breakpoints, int debug_execution)
@@ -428,8 +458,8 @@ int target_process_reset(struct command_context_s *cmd_ctx, enum target_reset_mo
        char buf[100];
        int retval;
        Jim_Nvp *n;
-       n = Jim_Nvp_value2name_simple( nvp_reset_modes, reset_mode );
-       if ( n->name == NULL ){
+       n = Jim_Nvp_value2name_simple(nvp_reset_modes, reset_mode);
+       if (n->name == NULL) {
                LOG_ERROR("invalid reset mode");
                return ERROR_FAIL;
        }
@@ -438,13 +468,14 @@ int target_process_reset(struct command_context_s *cmd_ctx, enum target_reset_mo
         * 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_continuous_poll;
-       target_continuous_poll = 0;
+       bool save_poll = jtag_poll_get_enabled();
 
-       sprintf( buf, "ocd_process_reset %s", n->name );
-       retval = Jim_Eval( interp, buf );
+       jtag_poll_set_enabled(false);
 
-       target_continuous_poll = save_poll;
+       sprintf(buf, "ocd_process_reset %s", n->name);
+       retval = Jim_Eval(interp, buf);
+
+       jtag_poll_set_enabled(save_poll);
 
        if (retval != JIM_OK) {
                Jim_PrintErrorMessage(interp);
@@ -465,7 +496,13 @@ static int default_virt2phys(struct target_s *target, uint32_t virtual, uint32_t
 
 static int default_mmu(struct target_s *target, int *enabled)
 {
-       *enabled = 0;
+       LOG_ERROR("Not implemented.");
+       return ERROR_FAIL;
+}
+
+static int default_has_mmu(struct target_s *target, bool *has_mmu)
+{
+       *has_mmu = true;
        return ERROR_OK;
 }
 
@@ -547,6 +584,11 @@ static int target_soft_reset_halt_imp(struct target_s *target)
                LOG_ERROR("Target not examined yet");
                return ERROR_FAIL;
        }
+       if (!target->type->soft_reset_halt_imp) {
+               LOG_ERROR("Target %s does not support soft_reset_halt",
+                               target->cmd_name);
+               return ERROR_FAIL;
+       }
        return target->type->soft_reset_halt_imp(target);
 }
 
@@ -566,11 +608,24 @@ int target_read_memory(struct target_s *target,
        return target->type->read_memory(target, address, size, count, buffer);
 }
 
+int target_read_phys_memory(struct target_s *target,
+               uint32_t address, uint32_t size, uint32_t count, uint8_t *buffer)
+{
+       return target->type->read_phys_memory(target, address, size, count, buffer);
+}
+
 int target_write_memory(struct target_s *target,
                uint32_t address, uint32_t size, uint32_t count, uint8_t *buffer)
 {
        return target->type->write_memory(target, address, size, count, buffer);
 }
+
+int target_write_phys_memory(struct target_s *target,
+               uint32_t address, uint32_t size, uint32_t count, uint8_t *buffer)
+{
+       return target->type->write_phys_memory(target, address, size, count, buffer);
+}
+
 int target_bulk_write_memory(struct target_s *target,
                uint32_t address, uint32_t count, uint8_t *buffer)
 {
@@ -639,6 +694,90 @@ void target_reset_examined(struct target_s *target)
 }
 
 
+
+static int default_mrc(struct target_s *target, int cpnum, uint32_t op1, uint32_t op2, uint32_t CRn, uint32_t CRm, uint32_t *value)
+{
+       LOG_ERROR("Not implemented");
+       return ERROR_FAIL;
+}
+
+static int default_mcr(struct target_s *target, int cpnum, uint32_t op1, uint32_t op2, uint32_t CRn, uint32_t CRm, uint32_t value)
+{
+       LOG_ERROR("Not implemented");
+       return ERROR_FAIL;
+}
+
+static int arm_cp_check(struct target_s *target, int cpnum, uint32_t op1, uint32_t op2, uint32_t CRn, uint32_t CRm)
+{
+       /* basic check */
+       if (!target_was_examined(target))
+       {
+               LOG_ERROR("Target not examined yet");
+               return ERROR_FAIL;
+       }
+
+       if ((cpnum <0) || (cpnum > 15))
+       {
+               LOG_ERROR("Illegal co-processor %d", cpnum);
+               return ERROR_FAIL;
+       }
+
+       return ERROR_OK;
+}
+
+int target_mrc(struct target_s *target, int cpnum, uint32_t op1, uint32_t op2, uint32_t CRn, uint32_t CRm, uint32_t *value)
+{
+       int retval;
+
+       retval = arm_cp_check(target, cpnum, op1, op2, CRn, CRm);
+       if (retval != ERROR_OK)
+               return retval;
+
+       return target->type->mrc(target, cpnum, op1, op2, CRn, CRm, value);
+}
+
+int target_mcr(struct target_s *target, int cpnum, uint32_t op1, uint32_t op2, uint32_t CRn, uint32_t CRm, uint32_t value)
+{
+       int retval;
+
+       retval = arm_cp_check(target, cpnum, op1, op2, CRn, CRm);
+       if (retval != ERROR_OK)
+               return retval;
+
+       return target->type->mcr(target, cpnum, op1, op2, CRn, CRm, value);
+}
+
+static int default_read_phys_memory(struct target_s *target, uint32_t address, uint32_t size, uint32_t count, uint8_t *buffer)
+{
+       int retval;
+       bool mmu;
+       retval = target->type->has_mmu(target, &mmu);
+       if (retval != ERROR_OK)
+               return retval;
+       if (mmu)
+       {
+               LOG_ERROR("Not implemented");
+               return ERROR_FAIL;
+       }
+       return target_read_memory(target, address, size, count, buffer);
+}
+
+static int default_write_phys_memory(struct target_s *target, uint32_t address, uint32_t size, uint32_t count, uint8_t *buffer)
+{
+       int retval;
+       bool mmu;
+       retval = target->type->has_mmu(target, &mmu);
+       if (retval != ERROR_OK)
+               return retval;
+       if (mmu)
+       {
+               LOG_ERROR("Not implemented");
+               return ERROR_FAIL;
+       }
+       return target_write_memory(target, address, size, count, buffer);
+}
+
+
 int target_init(struct command_context_s *cmd_ctx)
 {
        target_t *target = all_targets;
@@ -663,7 +802,28 @@ int target_init(struct command_context_s *cmd_ctx)
                {
                        target->type->virt2phys = default_virt2phys;
                }
-               target->type->virt2phys = default_virt2phys;
+
+               if (target->type->read_phys_memory == NULL)
+               {
+                       target->type->read_phys_memory = default_read_phys_memory;
+               }
+
+               if (target->type->write_phys_memory == NULL)
+               {
+                       target->type->write_phys_memory = default_write_phys_memory;
+               }
+
+               if (target->type->mcr == NULL)
+               {
+                       target->type->mcr = default_mcr;
+               }
+
+               if (target->type->mrc == NULL)
+               {
+                       target->type->mrc = default_mrc;
+               }
+
+
                /* a non-invasive way(in terms of patches) to add some code that
                 * runs before the type->write/read_memory implementation
                 */
@@ -680,6 +840,10 @@ int target_init(struct command_context_s *cmd_ctx)
                {
                        target->type->mmu = default_mmu;
                }
+               if (target->type->has_mmu == NULL)
+               {
+                       target->type->has_mmu = default_has_mmu;
+               }
                target = target->next;
        }
 
@@ -818,14 +982,14 @@ int target_call_event_callbacks(target_t *target, enum target_event event)
        if (event == TARGET_EVENT_HALTED)
        {
                /* execute early halted first */
-               target_call_event_callbacks(target, TARGET_EVENT_EARLY_HALTED);
+               target_call_event_callbacks(target, TARGET_EVENT_GDB_HALT);
        }
 
        LOG_DEBUG("target event %i (%s)",
                          event,
-                         Jim_Nvp_value2name_simple( nvp_target_event, event )->name );
+                         Jim_Nvp_value2name_simple(nvp_target_event, event)->name);
 
-       target_handle_event( target, event );
+       target_handle_event(target, event);
 
        while (callback)
        {
@@ -921,13 +1085,29 @@ int target_alloc_working_area(struct target_s *target, uint32_t size, working_ar
                {
                        return retval;
                }
+
                if (enabled)
                {
-                       target->working_area = target->working_area_virt;
-               }
-               else
+                       if (target->working_area_phys_spec)
+                       {
+                               LOG_DEBUG("MMU disabled, using physical address for working memory 0x%08x", (unsigned)target->working_area_phys);
+                               target->working_area = target->working_area_phys;
+                       } else
+                       {
+                               LOG_ERROR("No working memory available. Specify -work-area-phys to target.");
+                               return ERROR_TARGET_RESOURCE_NOT_AVAILABLE;
+                       }
+               } else
                {
-                       target->working_area = target->working_area_phys;
+                       if (target->working_area_virt_spec)
+                       {
+                               LOG_DEBUG("MMU enabled, using virtual address for working memory 0x%08x", (unsigned)target->working_area_virt);
+                               target->working_area = target->working_area_virt;
+                       } else
+                       {
+                               LOG_ERROR("No working memory available. Specify -work-area-virt to target.");
+                               return ERROR_TARGET_RESOURCE_NOT_AVAILABLE;
+                       }
                }
        }
 
@@ -956,8 +1136,6 @@ int target_alloc_working_area(struct target_s *target, uint32_t size, working_ar
                uint32_t first_free = target->working_area;
                uint32_t free_size = target->working_area_size;
 
-               LOG_DEBUG("allocating new working area");
-
                c = target->working_areas;
                while (c)
                {
@@ -969,11 +1147,13 @@ int target_alloc_working_area(struct target_s *target, uint32_t size, working_ar
 
                if (free_size < size)
                {
-                       LOG_WARNING("not enough working area available(requested %u, free %u)", 
+                       LOG_WARNING("not enough working area available(requested %u, free %u)",
                                    (unsigned)(size), (unsigned)(free_size));
                        return ERROR_TARGET_RESOURCE_NOT_AVAILABLE;
                }
 
+               LOG_DEBUG("allocated new working area at address 0x%08x", (unsigned)first_free);
+
                new_wa = malloc(sizeof(working_area_t));
                new_wa->next = NULL;
                new_wa->size = size;
@@ -1071,7 +1251,7 @@ int target_register_commands(struct command_context_s *cmd_ctx)
 
 
 
-       register_jim(cmd_ctx, "target", jim_target, "configure target" );
+       register_jim(cmd_ctx, "target", jim_target, "configure target");
 
        return ERROR_OK;
 }
@@ -1085,8 +1265,7 @@ int target_arch_state(struct target_s *target)
                return ERROR_OK;
        }
 
-       LOG_USER("target state: %s",
-                Jim_Nvp_value2name_simple(nvp_target_state,target->state)->name);
+       LOG_USER("target state: %s", target_state_name( target ));
 
        if (target->state != TARGET_HALTED)
                return ERROR_OK;
@@ -1102,7 +1281,7 @@ int target_arch_state(struct target_s *target)
 int target_write_buffer(struct target_s *target, uint32_t address, uint32_t size, uint8_t *buffer)
 {
        int retval;
-       LOG_DEBUG("writing buffer of %i byte at 0x%8.8x", 
+       LOG_DEBUG("writing buffer of %i byte at 0x%8.8x",
                  (int)size, (unsigned)address);
 
        if (!target_was_examined(target))
@@ -1118,8 +1297,8 @@ int target_write_buffer(struct target_s *target, uint32_t address, uint32_t size
        if ((address + size - 1) < address)
        {
                /* GDB can request this when e.g. PC is 0xfffffffc*/
-               LOG_ERROR("address + size wrapped(0x%08x, 0x%08x)", 
-                                 (unsigned)address, 
+               LOG_ERROR("address + size wrapped(0x%08x, 0x%08x)",
+                                 (unsigned)address,
                                  (unsigned)size);
                return ERROR_FAIL;
        }
@@ -1184,7 +1363,7 @@ int target_write_buffer(struct target_s *target, uint32_t address, uint32_t size
 int target_read_buffer(struct target_s *target, uint32_t address, uint32_t size, uint8_t *buffer)
 {
        int retval;
-       LOG_DEBUG("reading buffer of %i byte at 0x%8.8x", 
+       LOG_DEBUG("reading buffer of %i byte at 0x%8.8x",
                          (int)size, (unsigned)address);
 
        if (!target_was_examined(target))
@@ -1200,8 +1379,8 @@ int target_read_buffer(struct target_s *target, uint32_t address, uint32_t size,
        if ((address + size - 1) < address)
        {
                /* GDB can request this when e.g. PC is 0xfffffffc*/
-               LOG_ERROR("address + size wrapped(0x%08" PRIx32 ", 0x%08" PRIx32 ")", 
-                                 address, 
+               LOG_ERROR("address + size wrapped(0x%08" PRIx32 ", 0x%08" PRIx32 ")",
+                                 address,
                                  size);
                return ERROR_FAIL;
        }
@@ -1240,6 +1419,18 @@ int target_read_buffer(struct target_s *target, uint32_t address, uint32_t size,
                size -= aligned;
        }
 
+       /*prevent byte access when possible (avoid AHB access limitations in some cases)*/
+       if(size >=2)
+       {
+               int aligned = size - (size%2);
+               retval = target_read_memory(target, address, 2, aligned / 2, buffer);
+               if (retval != ERROR_OK)
+                       return retval;
+
+               buffer += aligned;
+               address += aligned;
+               size -= aligned;
+       }
        /* handle tail writes of less than 4 bytes */
        if (size > 0)
        {
@@ -1286,7 +1477,7 @@ int target_checksum_memory(struct target_s *target, uint32_t address, uint32_t s
                        target_buffer_set_u32(target, &buffer[i*sizeof(uint32_t)], target_data);
                }
 
-               retval = image_calculate_checksum( buffer, size, &checksum );
+               retval = image_calculate_checksum(buffer, size, &checksum);
                free(buffer);
        }
 
@@ -1326,14 +1517,14 @@ int target_read_u32(struct target_s *target, uint32_t address, uint32_t *value)
        if (retval == ERROR_OK)
        {
                *value = target_buffer_get_u32(target, value_buf);
-               LOG_DEBUG("address: 0x%8.8" PRIx32 ", value: 0x%8.8" PRIx32 "", 
-                                 address, 
+               LOG_DEBUG("address: 0x%8.8" PRIx32 ", value: 0x%8.8" PRIx32 "",
+                                 address,
                                  *value);
        }
        else
        {
                *value = 0x0;
-               LOG_DEBUG("address: 0x%8.8" PRIx32 " failed", 
+               LOG_DEBUG("address: 0x%8.8" PRIx32 " failed",
                                  address);
        }
 
@@ -1354,14 +1545,14 @@ int target_read_u16(struct target_s *target, uint32_t address, uint16_t *value)
        if (retval == ERROR_OK)
        {
                *value = target_buffer_get_u16(target, value_buf);
-               LOG_DEBUG("address: 0x%8.8" PRIx32 ", value: 0x%4.4x", 
-                                 address, 
+               LOG_DEBUG("address: 0x%8.8" PRIx32 ", value: 0x%4.4x",
+                                 address,
                                  *value);
        }
        else
        {
                *value = 0x0;
-               LOG_DEBUG("address: 0x%8.8" PRIx32 " failed", 
+               LOG_DEBUG("address: 0x%8.8" PRIx32 " failed",
                                  address);
        }
 
@@ -1379,14 +1570,14 @@ int target_read_u8(struct target_s *target, uint32_t address, uint8_t *value)
 
        if (retval == ERROR_OK)
        {
-               LOG_DEBUG("address: 0x%8.8" PRIx32 ", value: 0x%2.2x", 
-                                 address, 
+               LOG_DEBUG("address: 0x%8.8" PRIx32 ", value: 0x%2.2x",
+                                 address,
                                  *value);
        }
        else
        {
                *value = 0x0;
-               LOG_DEBUG("address: 0x%8.8" PRIx32 " failed", 
+               LOG_DEBUG("address: 0x%8.8" PRIx32 " failed",
                                  address);
        }
 
@@ -1403,8 +1594,8 @@ int target_write_u32(struct target_s *target, uint32_t address, uint32_t value)
                return ERROR_FAIL;
        }
 
-       LOG_DEBUG("address: 0x%8.8" PRIx32 ", value: 0x%8.8" PRIx32 "", 
-                         address, 
+       LOG_DEBUG("address: 0x%8.8" PRIx32 ", value: 0x%8.8" PRIx32 "",
+                         address,
                          value);
 
        target_buffer_set_u32(target, value_buf, value);
@@ -1426,8 +1617,8 @@ int target_write_u16(struct target_s *target, uint32_t address, uint16_t value)
                return ERROR_FAIL;
        }
 
-       LOG_DEBUG("address: 0x%8.8" PRIx32 ", value: 0x%8.8x", 
-                         address, 
+       LOG_DEBUG("address: 0x%8.8" PRIx32 ", value: 0x%8.8x",
+                         address,
                          value);
 
        target_buffer_set_u16(target, value_buf, value);
@@ -1448,7 +1639,7 @@ int target_write_u8(struct target_s *target, uint32_t address, uint8_t value)
                return ERROR_FAIL;
        }
 
-       LOG_DEBUG("address: 0x%8.8" PRIx32 ", value: 0x%2.2x", 
+       LOG_DEBUG("address: 0x%8.8" PRIx32 ", value: 0x%2.2x",
                          address, value);
 
        if ((retval = target_write_memory(target, address, 1, 1, &value)) != ERROR_OK)
@@ -1469,6 +1660,9 @@ int target_register_user_commands(struct command_context_s *cmd_ctx)
        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_jim(cmd_ctx, "mrc", jim_mcrmrc, "read coprocessor <cpnum> <op1> <op2> <CRn> <CRm>");
+       register_jim(cmd_ctx, "mcr", jim_mcrmrc, "write coprocessor <cpnum> <op1> <op2> <CRn> <CRm> <value>");
+
        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");
 
@@ -1486,18 +1680,27 @@ int target_register_user_commands(struct command_context_s *cmd_ctx)
        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, "mdw", handle_md_command, COMMAND_EXEC, "display memory words [phys] <addr> [count]");
+       register_command(cmd_ctx,  NULL, "mdh", handle_md_command, COMMAND_EXEC, "display memory half-words [phys] <addr> [count]");
+       register_command(cmd_ctx,  NULL, "mdb", handle_md_command, COMMAND_EXEC, "display memory bytes [phys] <addr> [count]");
+
+       register_command(cmd_ctx,  NULL, "mww", handle_mw_command, COMMAND_EXEC, "write memory word [phys]  <addr> <value> [count]");
+       register_command(cmd_ctx,  NULL, "mwh", handle_mw_command, COMMAND_EXEC, "write memory half-word [phys]  <addr> <value> [count]");
+       register_command(cmd_ctx,  NULL, "mwb", handle_mw_command, COMMAND_EXEC, "write memory byte [phys] <addr> <value> [count]");
+
+       register_command(cmd_ctx,  NULL, "bp",
+                       handle_bp_command, COMMAND_EXEC,
+                       "list or set breakpoint [<address> <length> [hw]]");
+       register_command(cmd_ctx,  NULL, "rbp",
+                       handle_rbp_command, COMMAND_EXEC,
+                       "remove breakpoint <address>");
+       register_command(cmd_ctx,  NULL, "wp",
+                       handle_wp_command, COMMAND_EXEC,
+                       "list or set watchpoint "
+                               "[<address> <length> <r/w/a> [value] [mask]]");
+       register_command(cmd_ctx,  NULL, "rwp",
+                       handle_rwp_command, COMMAND_EXEC,
+                       "remove watchpoint <address>");
 
        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>");
@@ -1520,7 +1723,7 @@ static int handle_targets_command(struct command_context_s *cmd_ctx, char *cmd,
        {
                target = get_target(args[0]);
                if (target == NULL) {
-                       command_print(cmd_ctx,"Target: %s is unknown, try one of:\n", args[0] );
+                       command_print(cmd_ctx,"Target: %s is unknown, try one of:\n", args[0]);
                        goto DumpTargets;
                }
                if (!target->tap->enabled) {
@@ -1544,8 +1747,7 @@ DumpTargets:
                char marker = ' ';
 
                if (target->tap->enabled)
-                       state = Jim_Nvp_value2name_simple(nvp_target_state,
-                                       target->state)->name;
+                       state = target_state_name( target );
                else
                        state = "tap-disabled";
 
@@ -1636,6 +1838,15 @@ static int sense_handler(void)
        return ERROR_OK;
 }
 
+static void target_call_event_callbacks_all(enum target_event e) {
+       target_t *target;
+       target = all_targets;
+       while (target) {
+               target_call_event_callbacks(target, e);
+               target = target->next;
+       }
+}
+
 /* process target state changes */
 int handle_target(void *priv)
 {
@@ -1654,22 +1865,24 @@ int handle_target(void *priv)
                int did_something = 0;
                if (runSrstAsserted)
                {
-                       Jim_Eval( interp, "srst_asserted");
+                       target_call_event_callbacks_all(TARGET_EVENT_GDB_HALT);
+                       Jim_Eval(interp, "srst_asserted");
                        did_something = 1;
                }
                if (runSrstDeasserted)
                {
-                       Jim_Eval( interp, "srst_deasserted");
+                       Jim_Eval(interp, "srst_deasserted");
                        did_something = 1;
                }
                if (runPowerDropout)
                {
-                       Jim_Eval( interp, "power_dropout");
+                       target_call_event_callbacks_all(TARGET_EVENT_GDB_HALT);
+                       Jim_Eval(interp, "power_dropout");
                        did_something = 1;
                }
                if (runPowerRestore)
                {
-                       Jim_Eval( interp, "power_restore");
+                       Jim_Eval(interp, "power_restore");
                        did_something = 1;
                }
 
@@ -1693,7 +1906,7 @@ int handle_target(void *priv)
         * Skip targets that are currently disabled.
         */
        for (target_t *target = all_targets;
-                       target_continuous_poll && target;
+                       is_jtag_poll_safe() && target;
                        target = target->next)
        {
                if (!target->tap->enabled)
@@ -1704,7 +1917,10 @@ int handle_target(void *priv)
                {
                        /* polling may fail silently until the target has been examined */
                        if ((retval = target_poll(target)) != ERROR_OK)
+                       {
+                               target_call_event_callbacks(target, TARGET_EVENT_GDB_HALT);
                                return retval;
+                       }
                }
        }
 
@@ -1731,17 +1947,30 @@ static int handle_reg_command(struct command_context_s *cmd_ctx, char *cmd, char
                while (cache)
                {
                        int i;
-                       for (i = 0; i < cache->num_regs; i++)
+
+                       command_print(cmd_ctx, "===== %s", cache->name);
+
+                       for (i = 0, reg = cache->reg_list;
+                                       i < cache->num_regs;
+                                       i++, reg++, count++)
                        {
-                               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, 
-                                                         (int)(cache->reg_list[i].size),
-                                                         value, 
-                                                         cache->reg_list[i].dirty, 
-                                                         cache->reg_list[i].valid);
-                               free(value);
+                               /* only print cached values if they are valid */
+                               if (reg->valid) {
+                                       value = buf_to_str(reg->value,
+                                                       reg->size, 16);
+                                       command_print(cmd_ctx,
+                                                       "(%i) %s (/%" PRIu32 "): 0x%s%s",
+                                                       count, reg->name,
+                                                       reg->size, value,
+                                                       reg->dirty
+                                                               ? " (dirty)"
+                                                               : "");
+                                       free(value);
+                               } else {
+                                       command_print(cmd_ctx, "(%i) %s (/%" PRIu32 ")",
+                                                         count, reg->name,
+                                                         reg->size) ;
+                               }
                        }
                        cache = cache->next;
                }
@@ -1839,7 +2068,7 @@ static int handle_poll_command(struct command_context_s *cmd_ctx, char *cmd, cha
        if (argc == 0)
        {
                command_print(cmd_ctx, "background polling: %s",
-                               target_continuous_poll ?  "on" : "off");
+                               jtag_poll_get_enabled() ? "on" : "off");
                command_print(cmd_ctx, "TAP: %s (%s)",
                                target->tap->dotted_name,
                                target->tap->enabled ? "enabled" : "disabled");
@@ -1855,11 +2084,11 @@ static int handle_poll_command(struct command_context_s *cmd_ctx, char *cmd, cha
        {
                if (strcmp(args[0], "on") == 0)
                {
-                       target_continuous_poll = 1;
+                       jtag_poll_set_enabled(true);
                }
                else if (strcmp(args[0], "off") == 0)
                {
-                       target_continuous_poll = 0;
+                       jtag_poll_set_enabled(false);
                }
                else
                {
@@ -1924,12 +2153,12 @@ int target_wait_state(target_t *target, enum target_state state, int ms)
                                Jim_Nvp_value2name_simple(nvp_target_state,state)->name);
                }
 
-               if (cur-then>500)
+               if (cur-then > 500)
                {
                        keep_alive();
                }
 
-               if ((cur-then)>ms)
+               if ((cur-then) > ms)
                {
                        LOG_ERROR("timed out while waiting for target %s",
                                Jim_Nvp_value2name_simple(nvp_target_state,state)->name);
@@ -1982,8 +2211,8 @@ static int handle_reset_command(struct command_context_s *cmd_ctx, char *cmd, ch
        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) ){
+               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;
@@ -2029,15 +2258,18 @@ static int handle_step_command(struct command_context_s *cmd_ctx, char *cmd, cha
         * with one argument addr = args[0],
         * handle breakpoints, debugging */
        uint32_t addr = 0;
+       int current_pc = 1;
        if (argc == 1)
        {
                int retval = parse_u32(args[0], &addr);
                if (ERROR_OK != retval)
                        return retval;
+               current_pc = 0;
        }
 
        target_t *target = get_current_target(cmd_ctx);
-       return target->type->step(target, 0, addr, 1);
+
+       return target->type->step(target, current_pc, addr, 1);
 }
 
 static void handle_md_output(struct command_context_s *cmd_ctx,
@@ -2066,7 +2298,7 @@ static void handle_md_output(struct command_context_s *cmd_ctx,
                {
                        output_len += snprintf(output + output_len,
                                        sizeof(output) - output_len,
-                                       "0x%8.8x: ", 
+                                       "0x%8.8x: ",
                                        (unsigned)(address + (i*size)));
                }
 
@@ -2102,6 +2334,22 @@ static int handle_md_command(struct command_context_s *cmd_ctx, char *cmd, char
        default: return ERROR_COMMAND_SYNTAX_ERROR;
        }
 
+       bool physical=strcmp(args[0], "phys")==0;
+       int (*fn)(struct target_s *target,
+                       uint32_t address, uint32_t size, uint32_t count, uint8_t *buffer);
+       if (physical)
+       {
+               argc--;
+               args++;
+               fn=target_read_phys_memory;
+       } else
+       {
+               fn=target_read_memory;
+       }
+       if ((argc < 1) || (argc > 2))
+       {
+               return ERROR_COMMAND_SYNTAX_ERROR;
+       }
        uint32_t address;
        int retval = parse_u32(args[0], &address);
        if (ERROR_OK != retval)
@@ -2118,8 +2366,7 @@ static int handle_md_command(struct command_context_s *cmd_ctx, char *cmd, char
        uint8_t *buffer = calloc(count, size);
 
        target_t *target = get_current_target(cmd_ctx);
-       retval = target_read_memory(target,
-                               address, size, count, buffer);
+       retval = fn(target, address, size, count, buffer);
        if (ERROR_OK == retval)
                handle_md_output(cmd_ctx, target, address, size, count, buffer);
 
@@ -2130,7 +2377,23 @@ static int handle_md_command(struct command_context_s *cmd_ctx, char *cmd, char
 
 static int handle_mw_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc)
 {
-        if ((argc < 2) || (argc > 3))
+       if (argc < 2)
+       {
+               return ERROR_COMMAND_SYNTAX_ERROR;
+       }
+       bool physical=strcmp(args[0], "phys")==0;
+       int (*fn)(struct target_s *target,
+                       uint32_t address, uint32_t size, uint32_t count, uint8_t *buffer);
+       if (physical)
+       {
+               argc--;
+               args++;
+               fn=target_write_phys_memory;
+       } else
+       {
+               fn=target_write_memory;
+       }
+       if ((argc < 2) || (argc > 3))
                return ERROR_COMMAND_SYNTAX_ERROR;
 
        uint32_t address;
@@ -2173,7 +2436,7 @@ static int handle_mw_command(struct command_context_s *cmd_ctx, char *cmd, char
        }
        for (unsigned i = 0; i < count; i++)
        {
-               retval = target_write_memory(target,
+               retval = fn(target,
                                address + i * wordsize, wordsize, 1, value_buf);
                if (ERROR_OK != retval)
                        return retval;
@@ -2241,7 +2504,7 @@ static int handle_load_image_command(struct command_context_s *cmd_ctx, char *cm
 
        duration_t duration;
        char *duration_text;
-       
+
        int retval = parse_load_image_command_args(args, argc,
                        &image, &min_address, &max_address);
        if (ERROR_OK != retval)
@@ -2262,8 +2525,8 @@ static int handle_load_image_command(struct command_context_s *cmd_ctx, char *cm
                buffer = malloc(image.sections[i].size);
                if (buffer == NULL)
                {
-                       command_print(cmd_ctx, 
-                                                 "error allocating buffer for section (%d bytes)", 
+                       command_print(cmd_ctx,
+                                                 "error allocating buffer for section (%d bytes)",
                                                  (int)(image.sections[i].size));
                        break;
                }
@@ -2280,16 +2543,16 @@ static int handle_load_image_command(struct command_context_s *cmd_ctx, char *cm
                /* DANGER!!! beware of unsigned comparision here!!! */
 
                if ((image.sections[i].base_address + buf_cnt >= min_address)&&
-                               (image.sections[i].base_address<max_address))
+                               (image.sections[i].base_address < max_address))
                {
-                       if (image.sections[i].base_address<min_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)
+                       if (image.sections[i].base_address + buf_cnt > max_address)
                        {
                                length -= (image.sections[i].base_address + buf_cnt)-max_address;
                        }
@@ -2300,8 +2563,8 @@ static int handle_load_image_command(struct command_context_s *cmd_ctx, char *cm
                                break;
                        }
                        image_size += length;
-                       command_print(cmd_ctx, "%u byte written at address 0x%8.8" PRIx32 "", 
-                                                 (unsigned int)length, 
+                       command_print(cmd_ctx, "%u bytes written at address 0x%8.8" PRIx32 "",
+                                                 (unsigned int)length,
                                                  image.sections[i].base_address + offset);
                }
 
@@ -2316,8 +2579,8 @@ static int handle_load_image_command(struct command_context_s *cmd_ctx, char *cm
 
        if (retval == ERROR_OK)
        {
-               command_print(cmd_ctx, "downloaded %u byte in %s", 
-                                         (unsigned int)image_size, 
+               command_print(cmd_ctx, "downloaded %u byte in %s",
+                                         (unsigned int)image_size,
                                          duration_text);
        }
        free(duration_text);
@@ -2459,8 +2722,8 @@ static int handle_verify_image_command_internal(struct command_context_s *cmd_ct
                buffer = malloc(image.sections[i].size);
                if (buffer == NULL)
                {
-                       command_print(cmd_ctx, 
-                                                 "error allocating buffer for section (%d bytes)", 
+                       command_print(cmd_ctx,
+                                                 "error allocating buffer for section (%d bytes)",
                                                  (int)(image.sections[i].size));
                        break;
                }
@@ -2473,16 +2736,16 @@ static int handle_verify_image_command_internal(struct command_context_s *cmd_ct
                if (verify)
                {
                        /* calculate checksum of image */
-                       image_calculate_checksum( buffer, buf_cnt, &checksum );
+                       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 )
+                       if (retval != ERROR_OK)
                        {
                                free(buffer);
                                break;
                        }
 
-                       if ( checksum != mem_checksum )
+                       if (checksum != mem_checksum)
                        {
                                /* failed crc checksum, fall back to a binary compare */
                                uint8_t *data;
@@ -2507,10 +2770,10 @@ static int handle_verify_image_command_internal(struct command_context_s *cmd_ct
                                        {
                                                if (data[t] != buffer[t])
                                                {
-                                                       command_print(cmd_ctx, 
-                                                                                 "Verify operation failed address 0x%08x. Was 0x%02x instead of 0x%02x\n", 
-                                                                                 (unsigned)(t + image.sections[i].base_address), 
-                                                                                 data[t], 
+                                                       command_print(cmd_ctx,
+                                                                                 "Verify operation failed address 0x%08x. Was 0x%02x instead of 0x%02x\n",
+                                                                                 (unsigned)(t + image.sections[i].base_address),
+                                                                                 data[t],
                                                                                  buffer[t]);
                                                        free(data);
                                                        free(buffer);
@@ -2528,8 +2791,8 @@ static int handle_verify_image_command_internal(struct command_context_s *cmd_ct
                        }
                } else
                {
-                       command_print(cmd_ctx, "address 0x%08" PRIx32 " length 0x%08" PRIx32 "", 
-                                                 image.sections[i].base_address, 
+                       command_print(cmd_ctx, "address 0x%08" PRIx32 " length 0x%08" PRIx32 "",
+                                                 image.sections[i].base_address,
                                                  buf_cnt);
                }
 
@@ -2546,8 +2809,8 @@ done:
 
        if (retval == ERROR_OK)
        {
-               command_print(cmd_ctx, "verified %u bytes in %s", 
-                                         (unsigned int)image_size, 
+               command_print(cmd_ctx, "verified %u bytes in %s",
+                                         (unsigned int)image_size,
                                          duration_text);
        }
        free(duration_text);
@@ -2578,7 +2841,7 @@ static int handle_bp_command_list(struct command_context_s *cmd_ctx)
                        char* buf = buf_to_str(breakpoint->orig_instr,
                                        breakpoint->length, 16);
                        command_print(cmd_ctx, "0x%8.8" PRIx32 ", 0x%x, %i, 0x%s",
-                                       breakpoint->address, 
+                                       breakpoint->address,
                                        breakpoint->length,
                                        breakpoint->set, buf);
                        free(buf);
@@ -2586,7 +2849,7 @@ static int handle_bp_command_list(struct command_context_s *cmd_ctx)
                else
                {
                        command_print(cmd_ctx, "0x%8.8" PRIx32 ", 0x%x, %i",
-                                                 breakpoint->address, 
+                                                 breakpoint->address,
                                                  breakpoint->length, breakpoint->set);
                }
 
@@ -2667,9 +2930,9 @@ static int handle_wp_command(struct command_context_s *cmd_ctx, char *cmd, char
 
                while (watchpoint)
                {
-                       command_print(cmd_ctx, 
-                                                 "address: 0x%8.8" PRIx32 ", len: 0x%8.8x, r/w/a: %i, value: 0x%8.8" PRIx32 ", mask: 0x%8.8" PRIx32 "", 
-                                                 watchpoint->address, 
+                       command_print(cmd_ctx,
+                                                 "address: 0x%8.8" PRIx32 ", len: 0x%8.8x, r/w/a: %i, value: 0x%8.8" PRIx32 ", mask: 0x%8.8" PRIx32 "",
+                                                 watchpoint->address,
                                                  watchpoint->length,
                                                  (int)(watchpoint->rw),
                                                  watchpoint->value,
@@ -2725,7 +2988,8 @@ static int handle_wp_command(struct command_context_s *cmd_ctx, char *cmd, char
                break;
 
        default:
-               command_print(cmd_ctx, "usage: wp <address> <length> [r/w/a] [value] [mask]");
+               command_print(cmd_ctx, "usage: wp [address length "
+                               "[(r|w|a) [value [mask]]]]");
                return ERROR_COMMAND_SYNTAX_ERROR;
        }
 
@@ -2790,7 +3054,7 @@ static void writeData(FILE *f, const void *data, size_t len)
 static void writeLong(FILE *f, int l)
 {
        int i;
-       for (i = 0; i<4; i++)
+       for (i = 0; i < 4; i++)
        {
                char c = (l >> (i*8))&0xff;
                writeData(f, &c, 1);
@@ -2822,13 +3086,13 @@ static void writeGmon(uint32_t *samples, uint32_t sampleNum, char *filename)
        /* figure out bucket size */
        uint32_t min = samples[0];
        uint32_t max = samples[0];
-       for (i = 0; i<sampleNum; i++)
+       for (i = 0; i < sampleNum; i++)
        {
-               if (min>samples[i])
+               if (min > samples[i])
                {
                        min = samples[i];
                }
-               if (max<samples[i])
+               if (max < samples[i])
                {
                        max = samples[i];
                }
@@ -2849,7 +3113,7 @@ static void writeGmon(uint32_t *samples, uint32_t sampleNum, char *filename)
                return;
        }
        memset(buckets, 0, sizeof(int)*length);
-       for (i = 0; i<sampleNum;i++)
+       for (i = 0; i < sampleNum;i++)
        {
                uint32_t address = samples[i];
                long long a = address-min;
@@ -2865,7 +3129,7 @@ static void writeGmon(uint32_t *samples, uint32_t sampleNum, char *filename)
        writeLong(f, length);           /* # of samples */
        writeLong(f, 64000000);         /* 64MHz */
        writeString(f, "seconds");
-       for (i = 0; i<(15-strlen("seconds")); i++)
+       for (i = 0; i < (15-strlen("seconds")); i++)
                writeData(f, &zero, 1);
        writeString(f, "s");
 
@@ -2874,11 +3138,11 @@ static void writeGmon(uint32_t *samples, uint32_t sampleNum, char *filename)
        char *data = malloc(2*length);
        if (data != NULL)
        {
-               for (i = 0; i<length;i++)
+               for (i = 0; i < length;i++)
                {
                        int val;
                        val = buckets[i];
-                       if (val>65535)
+                       if (val > 65535)
                        {
                                val = 65535;
                        }
@@ -3084,7 +3348,7 @@ static int target_mem2array(Jim_Interp *interp, target_t *target, int argc, Jim_
                        break;
                default:
                        Jim_SetResult(interp, Jim_NewEmptyStringObj(interp));
-                       Jim_AppendStrings( interp, Jim_GetResult(interp), "Invalid width param, must be 8/16/32", NULL );
+                       Jim_AppendStrings(interp, Jim_GetResult(interp), "Invalid width param, must be 8/16/32", NULL);
                        return JIM_ERR;
        }
        if (len == 0) {
@@ -3111,8 +3375,8 @@ static int target_mem2array(Jim_Interp *interp, target_t *target, int argc, Jim_
        } else {
                char buf[100];
                Jim_SetResult(interp, Jim_NewEmptyStringObj(interp));
-               sprintf(buf, "mem2array address: 0x%08" PRIx32 " is not aligned for %" PRId32 " byte reads", 
-                               addr, 
+               sprintf(buf, "mem2array address: 0x%08" PRIx32 " is not aligned for %" PRId32 " byte reads",
+                               addr,
                                width);
                Jim_AppendStrings(interp, Jim_GetResult(interp), buf , NULL);
                return JIM_ERR;
@@ -3132,12 +3396,12 @@ static int target_mem2array(Jim_Interp *interp, target_t *target, int argc, Jim_
                        count = (sizeof(buffer)/width);
                }
 
-               retval = target_read_memory( target, addr, width, count, buffer );
+               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", 
-                                         (unsigned int)addr, 
-                                         (int)width, 
+                       LOG_ERROR("mem2array: Read @ 0x%08x, w=%d, cnt=%d, failed",
+                                         (unsigned int)addr,
+                                         (int)width,
                                          (int)count);
                        Jim_SetResult(interp, Jim_NewEmptyStringObj(interp));
                        Jim_AppendStrings(interp, Jim_GetResult(interp), "mem2array: cannot read memory", NULL);
@@ -3205,19 +3469,18 @@ static int jim_array2mem(Jim_Interp *interp, int argc, Jim_Obj *const *argv)
        target_t *target;
 
        context = Jim_GetAssocData(interp, "context");
-       if (context == NULL){
+       if (context == NULL) {
                LOG_ERROR("array2mem: no command context");
                return JIM_ERR;
        }
        target = get_current_target(context);
-       if (target == NULL){
+       if (target == NULL) {
                LOG_ERROR("array2mem: no current target");
                return JIM_ERR;
        }
 
-       return target_array2mem( interp,target, argc-1, argv + 1 );
+       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;
@@ -3271,7 +3534,7 @@ static int target_array2mem(Jim_Interp *interp, target_t *target, int argc, Jim_
                        break;
                default:
                        Jim_SetResult(interp, Jim_NewEmptyStringObj(interp));
-                       Jim_AppendStrings( interp, Jim_GetResult(interp), "Invalid width param, must be 8/16/32", NULL );
+                       Jim_AppendStrings(interp, Jim_GetResult(interp), "Invalid width param, must be 8/16/32", NULL);
                        return JIM_ERR;
        }
        if (len == 0) {
@@ -3298,8 +3561,8 @@ static int target_array2mem(Jim_Interp *interp, target_t *target, int argc, Jim_
        } else {
                char buf[100];
                Jim_SetResult(interp, Jim_NewEmptyStringObj(interp));
-               sprintf(buf, "array2mem address: 0x%08x is not aligned for %d byte reads", 
-                               (unsigned int)addr, 
+               sprintf(buf, "array2mem address: 0x%08x is not aligned for %d byte reads",
+                               (unsigned int)addr,
                                (int)width);
                Jim_AppendStrings(interp, Jim_GetResult(interp), buf , NULL);
                return JIM_ERR;
@@ -3339,9 +3602,9 @@ static int target_array2mem(Jim_Interp *interp, target_t *target, int argc, Jim_
                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", 
-                                         (unsigned int)addr, 
-                                         (int)width, 
+                       LOG_ERROR("array2mem: Write @ 0x%08x, w=%d, cnt=%d, failed",
+                                         (unsigned int)addr,
+                                         (int)width,
                                          (int)count);
                        Jim_SetResult(interp, Jim_NewEmptyStringObj(interp));
                        Jim_AppendStrings(interp, Jim_GetResult(interp), "array2mem: cannot read memory", NULL);
@@ -3355,50 +3618,43 @@ static int target_array2mem(Jim_Interp *interp, target_t *target, int argc, Jim_
        return JIM_OK;
 }
 
-void target_all_handle_event( enum target_event e )
+void target_all_handle_event(enum target_event e)
 {
        target_t *target;
 
-       LOG_DEBUG( "**all*targets: event: %d, %s",
+       LOG_DEBUG("**all*targets: event: %d, %s",
                           (int)e,
-                          Jim_Nvp_value2name_simple( nvp_target_event, e )->name );
+                          Jim_Nvp_value2name_simple(nvp_target_event, e)->name);
 
        target = all_targets;
-       while (target){
-               target_handle_event( target, e );
+       while (target) {
+               target_handle_event(target, e);
                target = target->next;
        }
 }
 
-void target_handle_event( target_t *target, enum target_event e )
+
+/* FIX? should we propagate errors here rather than printing them
+ * and continuing?
+ */
+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",
+       for (teap = target->event_action; teap != NULL; teap = teap->next) {
+               if (teap->event == e) {
+                       LOG_DEBUG("target: (%d) %s (%s) event: %d (%s) action: %s",
                                           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_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 );
        }
 }
 
@@ -3428,7 +3684,7 @@ static Jim_Nvp nvp_config_opts[] = {
        { .name = NULL, .value = -1 }
 };
 
-static int target_configure( Jim_GetOptInfo *goi, target_t *target )
+static int target_configure(Jim_GetOptInfo *goi, target_t *target)
 {
        Jim_Nvp *n;
        Jim_Obj *o;
@@ -3437,64 +3693,64 @@ static int target_configure( Jim_GetOptInfo *goi, target_t *target )
        int e;
 
        /* parse config or cget options ... */
-       while ( goi->argc > 0 ){
-               Jim_SetEmptyResult( goi->interp );
-               /* Jim_GetOpt_Debug( goi ); */
+       while (goi->argc > 0) {
+               Jim_SetEmptyResult(goi->interp);
+               /* Jim_GetOpt_Debug(goi); */
 
-               if ( target->type->target_jim_configure ){
+               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 ){
+                       e = (*(target->type->target_jim_configure))(target, goi);
+                       if (e == JIM_OK) {
                                /* more? */
                                continue;
                        }
-                       if ( e == JIM_ERR ){
+                       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 );
+               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 ){
+               switch (n->value) {
                case TCFG_TYPE:
                        /* not setable */
-                       if ( goi->isconfigure ){
-                               Jim_SetResult_sprintf( goi->interp, "not setable: %s", n->name );
+                       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");
+                               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 );
+                       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? ...");
+                       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 );
+                       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?");
+                       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 ){
+                               if (goi->argc != 0) {
                                        Jim_WrongNumArgs(goi->interp, goi->argc, goi->argv, "-event ?event-name?");
                                        return JIM_ERR;
                                }
@@ -3505,24 +3761,26 @@ static int target_configure( Jim_GetOptInfo *goi, target_t *target )
 
                                teap = target->event_action;
                                /* replace existing? */
-                               while ( teap ){
-                                       if ( teap->event == (enum target_event)n->value ){
+                               while (teap) {
+                                       if (teap->event == (enum target_event)n->value) {
                                                break;
                                        }
                                        teap = teap->next;
                                }
 
-                               if ( goi->isconfigure ){
-                                       if ( teap == NULL ){
+                               if (goi->isconfigure) {
+                                       bool replace = true;
+                                       if (teap == NULL) {
                                                /* create new */
-                                               teap = calloc( 1, sizeof(*teap) );
+                                               teap = calloc(1, sizeof(*teap));
+                                               replace = false;
                                        }
                                        teap->event = n->value;
-                                       Jim_GetOpt_Obj( goi, &o );
-                                       if ( teap->body ){
-                                               Jim_DecrRefCount( interp, teap->body );
+                                       Jim_GetOpt_Obj(goi, &o);
+                                       if (teap->body) {
+                                               Jim_DecrRefCount(interp, teap->body);
                                        }
-                                       teap->body  = Jim_DuplicateObj( goi->interp, o );
+                                       teap->body  = Jim_DuplicateObj(goi->interp, o);
                                        /*
                                         * FIXME:
                                         *     Tcl/TK - "tk events" have a nice feature.
@@ -3533,18 +3791,21 @@ static int target_configure( Jim_GetOptInfo *goi, target_t *target )
                                         *     The idea is: %N - target number
                                         *     The idea is: %E - event name.
                                         */
-                                       Jim_IncrRefCount( teap->body );
+                                       Jim_IncrRefCount(teap->body);
 
-                                       /* add to head of event list */
-                                       teap->next = target->event_action;
-                                       target->event_action = teap;
+                                       if (!replace)
+                                       {
+                                               /* 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 );
+                                       if (teap == NULL) {
+                                               Jim_SetEmptyResult(goi->interp);
                                        } else {
-                                               Jim_SetResult( goi->interp, Jim_DuplicateObj( goi->interp, teap->body ) );
+                                               Jim_SetResult(goi->interp, Jim_DuplicateObj(goi->interp, teap->body));
                                        }
                                }
                        }
@@ -3552,67 +3813,69 @@ static int target_configure( Jim_GetOptInfo *goi, target_t *target )
                        break;
 
                case TCFG_WORK_AREA_VIRT:
-                       if ( goi->isconfigure ){
+                       if (goi->isconfigure) {
                                target_free_all_working_areas(target);
-                               e = Jim_GetOpt_Wide( goi, &w );
-                               if ( e != JIM_OK ){
+                               e = Jim_GetOpt_Wide(goi, &w);
+                               if (e != JIM_OK) {
                                        return e;
                                }
                                target->working_area_virt = w;
+                               target->working_area_virt_spec = true;
                        } else {
-                               if ( goi->argc != 0 ){
+                               if (goi->argc != 0) {
                                        goto no_params;
                                }
                        }
-                       Jim_SetResult( interp, Jim_NewIntObj( goi->interp, target->working_area_virt ) );
+                       Jim_SetResult(interp, Jim_NewIntObj(goi->interp, target->working_area_virt));
                        /* loop for more */
                        break;
 
                case TCFG_WORK_AREA_PHYS:
-                       if ( goi->isconfigure ){
+                       if (goi->isconfigure) {
                                target_free_all_working_areas(target);
-                               e = Jim_GetOpt_Wide( goi, &w );
-                               if ( e != JIM_OK ){
+                               e = Jim_GetOpt_Wide(goi, &w);
+                               if (e != JIM_OK) {
                                        return e;
                                }
                                target->working_area_phys = w;
+                               target->working_area_phys_spec = true;
                        } else {
-                               if ( goi->argc != 0 ){
+                               if (goi->argc != 0) {
                                        goto no_params;
                                }
                        }
-                       Jim_SetResult( interp, Jim_NewIntObj( goi->interp, target->working_area_phys ) );
+                       Jim_SetResult(interp, Jim_NewIntObj(goi->interp, target->working_area_phys));
                        /* loop for more */
                        break;
 
                case TCFG_WORK_AREA_SIZE:
-                       if ( goi->isconfigure ){
+                       if (goi->isconfigure) {
                                target_free_all_working_areas(target);
-                               e = Jim_GetOpt_Wide( goi, &w );
-                               if ( e != JIM_OK ){
+                               e = Jim_GetOpt_Wide(goi, &w);
+                               if (e != JIM_OK) {
                                        return e;
                                }
                                target->working_area_size = w;
                        } else {
-                               if ( goi->argc != 0 ){
+                               if (goi->argc != 0) {
                                        goto no_params;
                                }
                        }
-                       Jim_SetResult( interp, Jim_NewIntObj( goi->interp, target->working_area_size ) );
+                       Jim_SetResult(interp, Jim_NewIntObj(goi->interp, target->working_area_size));
                        /* loop for more */
                        break;
 
                case TCFG_WORK_AREA_BACKUP:
-                       if ( goi->isconfigure ){
+                       if (goi->isconfigure) {
                                target_free_all_working_areas(target);
-                               e = Jim_GetOpt_Wide( goi, &w );
-                               if ( e != JIM_OK ){
+                               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 ){
+                               if (goi->argc != 0) {
                                        goto no_params;
                                }
                        }
@@ -3621,73 +3884,73 @@ static int target_configure( Jim_GetOptInfo *goi, target_t *target )
                        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 );
+                       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 ){
+                               if (goi->argc != 0) {
                                        goto no_params;
                                }
                        }
-                       n = Jim_Nvp_value2name_simple( nvp_target_endian, target->endianness );
-                       if ( n->name == NULL ){
+                       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 );
+                               n = Jim_Nvp_value2name_simple(nvp_target_endian, target->endianness);
                        }
-                       Jim_SetResultString( goi->interp, n->name, -1 );
+                       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,
+                       if (goi->isconfigure) {
+                               if (goi->argc < 1) {
+                                       Jim_SetResult_sprintf(goi->interp,
                                                                                   "%s ?STRING?",
-                                                                                  n->name );
+                                                                                  n->name);
                                        return JIM_ERR;
                                }
-                               if ( target->variant ){
+                               if (target->variant) {
                                        free((void *)(target->variant));
                                }
-                               e = Jim_GetOpt_String( goi, &cp, NULL );
+                               e = Jim_GetOpt_String(goi, &cp, NULL);
                                target->variant = strdup(cp);
                        } else {
-                               if ( goi->argc != 0 ){
+                               if (goi->argc != 0) {
                                        goto no_params;
                                }
                        }
-                       Jim_SetResultString( goi->interp, target->variant,-1 );
+                       Jim_SetResultString(goi->interp, target->variant,-1);
                        /* loop for more */
                        break;
                case TCFG_CHAIN_POSITION:
-                       if ( goi->isconfigure ){
+                       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 ){
+                               e = Jim_GetOpt_Obj(goi, &o);
+                               if (e != JIM_OK) {
                                        return e;
                                }
-                               tap = jtag_tap_by_jim_obj( goi->interp, o );
-                               if ( tap == NULL ){
+                               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 ){
+                               if (goi->argc != 0) {
                                        goto no_params;
                                }
                        }
-                       Jim_SetResultString( interp, target->tap->dotted_name, -1 );
+                       Jim_SetResultString(interp, target->tap->dotted_name, -1);
                        /* loop for more e*/
                        break;
                }
-       } /* while ( goi->argc ) */
+       } /* while (goi->argc) */
 
 
                /* done - we return */
@@ -3695,7 +3958,7 @@ static int target_configure( Jim_GetOptInfo *goi, target_t *target )
 }
 
 /** this is the 'tcl' handler for the target specific command */
-static int tcl_target_func( Jim_Interp *interp, int argc, Jim_Obj *const *argv )
+static int tcl_target_func(Jim_Interp *interp, int argc, Jim_Obj *const *argv)
 {
        Jim_GetOptInfo goi;
        jim_wide a,b,c;
@@ -3749,36 +4012,36 @@ static int tcl_target_func( Jim_Interp *interp, int argc, Jim_Obj *const *argv )
        };
 
        /* go past the "command" */
-       Jim_GetOpt_Setup( &goi, interp, argc-1, argv + 1 );
+       Jim_GetOpt_Setup(&goi, interp, argc-1, argv + 1);
 
-       target = Jim_CmdPrivData( goi.interp );
+       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 );
+       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 );
+       Jim_SetEmptyResult(goi.interp);
 
-       switch ( n->value ){
+       switch (n->value) {
        case TS_CMD_CONFIGURE:
-               if ( goi.argc < 2 ){
-                       Jim_WrongNumArgs( goi.interp, goi.argc, goi.argv, "missing: -option VALUE ...");
+               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 );
+               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?");
+               if (goi.argc < 1) {
+                       Jim_WrongNumArgs(goi.interp, 0, goi.argv, "missing: ?-option?");
                        return JIM_ERR;
                }
                goi.isconfigure = 0;
-               return target_configure( &goi, target );
+               return target_configure(&goi, target);
                break;
        case TS_CMD_MWW:
        case TS_CMD_MWH:
@@ -3789,50 +4052,50 @@ static int tcl_target_func( Jim_Interp *interp, int argc, Jim_Obj *const *argv )
                 * argv[3] = optional count.
                 */
 
-               if ( (goi.argc == 2) || (goi.argc == 3) ){
+               if ((goi.argc == 2) || (goi.argc == 3)) {
                        /* all is well */
                } else {
                mwx_error:
-                       Jim_SetResult_sprintf( goi.interp, "expected: %s ADDR DATA [COUNT]", n->name );
+                       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 ){
+               e = Jim_GetOpt_Wide(&goi, &a);
+               if (e != JIM_OK) {
                        goto mwx_error;
                }
 
-               e = Jim_GetOpt_Wide( &goi, &b );
-               if ( e != JIM_OK ){
+               e = Jim_GetOpt_Wide(&goi, &b);
+               if (e != JIM_OK) {
                        goto mwx_error;
                }
                if (goi.argc == 3) {
-                       e = Jim_GetOpt_Wide( &goi, &c );
-                       if ( e != JIM_OK ){
+                       e = Jim_GetOpt_Wide(&goi, &c);
+                       if (e != JIM_OK) {
                                goto mwx_error;
                        }
                } else {
                        c = 1;
                }
 
-               switch ( n->value ){
+               switch (n->value) {
                case TS_CMD_MWW:
-                       target_buffer_set_u32( target, target_buf, b );
+                       target_buffer_set_u32(target, target_buf, b);
                        b = 4;
                        break;
                case TS_CMD_MWH:
-                       target_buffer_set_u16( target, target_buf, b );
+                       target_buffer_set_u16(target, target_buf, b);
                        b = 2;
                        break;
                case TS_CMD_MWB:
-                       target_buffer_set_u8( target, target_buf, b );
+                       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 );
+               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 */
@@ -3849,24 +4112,24 @@ static int tcl_target_func( Jim_Interp *interp, int argc, Jim_Obj *const *argv )
                 * 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 );
+               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 ){
+               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 ){
+               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 ){
+               switch (n->value) {
                case TS_CMD_MDW:
                        b =  4;
                        break;
@@ -3881,52 +4144,52 @@ static int tcl_target_func( Jim_Interp *interp, int argc, Jim_Obj *const *argv )
                /* convert to "bytes" */
                c = c * b;
                /* count is now in 'BYTES' */
-               while ( c > 0 ){
+               while (c > 0) {
                        y = c;
-                       if ( y > 16 ){
+                       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) );
+                       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 ){
+                       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 = 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, "         " );
+                               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 = 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, "     " );
+                               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 = 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, "   " );
+                               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) ){
+                       for (x = 0 ; x < y ; x++) {
+                               if ((target_buf[x] >= 0x20) &&
+                                       (target_buf[x] <= 0x7e){
                                        /* good */
                                } else {
                                        /* smack it */
@@ -3934,119 +4197,127 @@ static int tcl_target_func( Jim_Interp *interp, int argc, Jim_Obj *const *argv )
                                }
                        }
                        /* space pad  */
-                       while ( x < 16 ){
+                       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 );
+                       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 );
+               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 );
+               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]");
+               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 );
+               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]");
+               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)) ){
+               if (!(target_was_examined(target))) {
                        e = ERROR_TARGET_NOT_EXAMINED;
                } else {
-                       e = target->type->poll( target );
+                       e = target->type->poll(target);
                }
-               if ( e != ERROR_OK ){
-                       Jim_SetResult_sprintf( interp, "poll-fails: %d", e );
+               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");
+               if (goi.argc != 2) {
+                       Jim_WrongNumArgs(interp, 2, argv,
+                                       "([tT]|[fF]|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 );
+               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 ){
+               e = Jim_GetOpt_Wide(&goi, &a);
+               if (e != JIM_OK) {
                        return e;
                }
                if (!target->tap->enabled)
                        goto err_tap_disabled;
+               if (!target->type->assert_reset
+                               || !target->type->deassert_reset) {
+                       Jim_SetResult_sprintf(interp,
+                                       "No target-specific reset for %s",
+                                       target->cmd_name);
+                       return JIM_ERR;
+               }
                /* 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 );
+               if (n->value == NVP_ASSERT) {
+                       e = target->type->assert_reset(target);
                } else {
-                       target->type->deassert_reset( target );
+                       e = target->type->deassert_reset(target);
                }
-               return JIM_OK;
+               return (e == ERROR_OK) ? JIM_OK : JIM_ERR;
        case TS_CMD_HALT:
-               if ( goi.argc ){
-                       Jim_WrongNumArgs( goi.interp, 0, argv, "halt [no parameters]");
+               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;
+               e = target->type->halt(target);
+               return (e == ERROR_OK) ? JIM_OK : JIM_ERR;
        case TS_CMD_WAITSTATE:
                /* params:  <name>  statename timeoutmsecs */
-               if ( goi.argc != 2 ){
-                       Jim_SetResult_sprintf( goi.interp, "%s STATENAME TIMEOUTMSECS", n->name );
+               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 );
+               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 ){
+               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,
+               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) );
+                                                                  e, target_strerror_safe(e));
                        return JIM_ERR;
                } else {
                        return JIM_OK;
@@ -4058,40 +4329,41 @@ static int tcl_target_func( Jim_Interp *interp, int argc, Jim_Obj *const *argv )
                {
                        target_event_action_t *teap;
                        teap = target->event_action;
-                       command_print( cmd_ctx, "Event actions for target (%d) %s\n",
+                       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,
+                                                  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 ) );
+                                                          Jim_Nvp_value2name_simple(nvp_target_event, teap->event)->name,
+                                                          Jim_GetString(teap->body, NULL));
                                teap = teap->next;
                        }
-                       command_print( cmd_ctx, "***END***");
+                       command_print(cmd_ctx, "***END***");
                        return JIM_OK;
                }
        case TS_CMD_CURSTATE:
-               if ( goi.argc != 0 ){
-                       Jim_WrongNumArgs( goi.interp, 0, argv, "[no parameters]");
+               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);
+               Jim_SetResultString(goi.interp,
+                                                       target_state_name( target ),
+                                                       -1);
                return JIM_OK;
        case TS_CMD_INVOKE_EVENT:
-               if ( goi.argc != 1 ){
-                       Jim_SetResult_sprintf( goi.interp, "%s ?EVENTNAME?",n->name);
+               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 );
+               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 );
+               target_handle_event(target, n->value);
                return JIM_OK;
        }
        return JIM_ERR;
@@ -4101,7 +4373,7 @@ err_tap_disabled:
        return JIM_ERR;
 }
 
-static int target_create( Jim_GetOptInfo *goi )
+static int target_create(Jim_GetOptInfo *goi)
 {
        Jim_Obj *new_cmd;
        Jim_Cmd *cmd;
@@ -4113,44 +4385,44 @@ static int target_create( Jim_GetOptInfo *goi )
        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...");
+       if (goi->argc < 3) {
+               Jim_WrongNumArgs(goi->interp, 1, goi->argv, "?name? ?type? ..options...");
                return JIM_ERR;
        }
 
        /* COMMAND */
-       Jim_GetOpt_Obj( goi, &new_cmd );
+       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 );
+       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 );
+       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 ) ){
+       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,
+       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_AppendStrings(goi->interp,
                                                                   Jim_GetResult(goi->interp),
                                                                   " or ",
-                                                                  target_types[x]->name,NULL );
+                                                                  target_types[x]->name,NULL);
                        }
                }
                return JIM_ERR;
@@ -4164,7 +4436,7 @@ static int target_create( Jim_GetOptInfo *goi )
        /* 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));
+       memcpy(target->type, target_types[x], sizeof(target_type_t));
 
        /* will be set by "-endian" */
        target->endianness = TARGET_ENDIAN_UNKNOWN;
@@ -4184,6 +4456,8 @@ static int target_create( Jim_GetOptInfo *goi )
 
        target->display             = 1;
 
+       target->halt_issued                     = false;
+
        /* initialize trace information */
        target->trace_info = malloc(sizeof(trace_t));
        target->trace_info->num_trace_points         = 0;
@@ -4201,21 +4475,21 @@ static int target_create( Jim_GetOptInfo *goi )
 
        /* Do the rest as "configure" options */
        goi->isconfigure = 1;
-       e = target_configure( goi, target);
+       e = target_configure(goi, target);
 
        if (target->tap == NULL)
        {
-               Jim_SetResultString( interp, "-chain-position required when creating target", -1);
+               Jim_SetResultString(interp, "-chain-position required when creating target", -1);
                e = JIM_ERR;
        }
 
-       if ( e != JIM_OK ){
-               free( target->type );
-               free( target );
+       if (e != JIM_OK) {
+               free(target->type);
+               free(target);
                return e;
        }
 
-       if ( target->endianness == TARGET_ENDIAN_UNKNOWN ){
+       if (target->endianness == TARGET_ENDIAN_UNKNOWN) {
                /* default endian to little if not specified */
                target->endianness = TARGET_LITTLE_ENDIAN;
        }
@@ -4225,38 +4499,38 @@ static int target_create( Jim_GetOptInfo *goi )
                target->variant = strdup("");
 
        /* create the target specific commands */
-       if ( target->type->register_commands ){
-               (*(target->type->register_commands))( cmd_ctx );
+       if (target->type->register_commands) {
+               (*(target->type->register_commands))(cmd_ctx);
        }
-       if ( target->type->target_create ){
-               (*(target->type->target_create))( target, goi->interp );
+       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 );
+               while (*tpp) {
+                       tpp = &((*tpp)->next);
                }
                *tpp = target;
        }
 
-       cp = Jim_GetString( new_cmd, NULL );
+       cp = Jim_GetString(new_cmd, NULL);
        target->cmd_name = strdup(cp);
 
        /* now - create the new target name command */
-       e = Jim_CreateCommand( goi->interp,
+       e = Jim_CreateCommand(goi->interp,
                                                   /* name */
                                                   cp,
                                                   tcl_target_func, /* C function */
                                                   target, /* private data */
-                                                  NULL ); /* no del proc */
+                                                  NULL); /* no del proc */
 
        return e;
 }
 
-static int jim_target( Jim_Interp *interp, int argc, Jim_Obj *const *argv )
+static int jim_target(Jim_Interp *interp, int argc, Jim_Obj *const *argv)
 {
        int x,r,e;
        jim_wide w;
@@ -4281,91 +4555,95 @@ static int jim_target( Jim_Interp *interp, int argc, Jim_Obj *const *argv )
        LOG_DEBUG("Target command params:");
        LOG_DEBUG("%s", Jim_Debug_ArgvString(interp, argc, argv));
 
-       cmd_ctx = Jim_GetAssocData( interp, "context" );
+       cmd_ctx = Jim_GetAssocData(interp, "context");
 
-       Jim_GetOpt_Setup( &goi, interp, argc-1, argv + 1 );
+       Jim_GetOpt_Setup(&goi, interp, argc-1, argv + 1);
 
-       if ( goi.argc == 0 ){
+       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 ){
+       /* Jim_GetOpt_Debug(&goi); */
+       r = Jim_GetOpt_Enum(&goi, target_cmds, &x);
+       if (r != JIM_OK) {
                return r;
        }
 
-       switch (x){
+       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");
+               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 );
+               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" );
+               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_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 ) );
+                                                                  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" );
+               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 ) );
+               Jim_SetResult(goi.interp, Jim_NewListObj(goi.interp, NULL, 0));
                target = all_targets;
-               while ( target ){
-                       Jim_ListAppendElement( goi.interp,
+               while (target) {
+                       Jim_ListAppendElement(goi.interp,
                                                                   Jim_GetResult(goi.interp),
-                                                                  Jim_NewStringObj( goi.interp, target->cmd_name, -1 ) );
+                                                                  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 ...");
+               if (goi.argc < 3) {
+                       Jim_WrongNumArgs(goi.interp, goi.argc, goi.argv, "?name  ... config options ...");
                        return JIM_ERR;
                }
-               return target_create( &goi );
+               return target_create(&goi);
                break;
        case TG_CMD_NUMBER:
-               if ( goi.argc != 1 ){
-                       Jim_SetResult_sprintf( goi.interp, "expected: target number ?NUMBER?");
+               /* It's OK to remove this mechanism sometime after August 2010 or so */
+               LOG_WARNING("don't use numbers as target identifiers; use names");
+               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 ){
+               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;
+               for (x = 0, target = all_targets; target; target = target->next, x++) {
+                       if (target->target_number == w)
+                               break;
                }
+               if (target == NULL) {
+                       Jim_SetResult_sprintf(goi.interp,
+                                       "Target: number %d does not exist", (int)(w));
+                       return JIM_ERR;
+               }
+               Jim_SetResultString(goi.interp, target->cmd_name, -1);
+               return JIM_OK;
        case TG_CMD_COUNT:
-               if ( goi.argc != 0 ){
-                       Jim_WrongNumArgs( goi.interp, 0, goi.argv, "<no parameters>");
+               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()));
+               for (x = 0, target = all_targets; target; target = target->next, x++)
+                       continue;
+               Jim_SetResult(goi.interp, Jim_NewIntObj(goi.interp, x));
                return JIM_OK;
        }
 
@@ -4389,7 +4667,7 @@ static void free_fastload(void)
        if (fastload != NULL)
        {
                int i;
-               for (i = 0; i<fastload_num; i++)
+               for (i = 0; i < fastload_num; i++)
                {
                        if (fastload[i].data)
                                free(fastload[i].data);
@@ -4443,7 +4721,7 @@ static int handle_fast_load_image_command(struct command_context_s *cmd_ctx, cha
                buffer = malloc(image.sections[i].size);
                if (buffer == NULL)
                {
-                       command_print(cmd_ctx, "error allocating buffer for section (%d bytes)", 
+                       command_print(cmd_ctx, "error allocating buffer for section (%d bytes)",
                                                  (int)(image.sections[i].size));
                        break;
                }
@@ -4461,16 +4739,16 @@ static int handle_fast_load_image_command(struct command_context_s *cmd_ctx, cha
                /* DANGER!!! beware of unsigned comparision here!!! */
 
                if ((image.sections[i].base_address + buf_cnt >= min_address)&&
-                               (image.sections[i].base_address<max_address))
+                               (image.sections[i].base_address < max_address))
                {
-                       if (image.sections[i].base_address<min_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)
+                       if (image.sections[i].base_address + buf_cnt > max_address)
                        {
                                length -= (image.sections[i].base_address + buf_cnt)-max_address;
                        }
@@ -4486,8 +4764,8 @@ static int handle_fast_load_image_command(struct command_context_s *cmd_ctx, cha
                        fastload[i].length = length;
 
                        image_size += length;
-                       command_print(cmd_ctx, "%u byte written at address 0x%8.8x", 
-                                                 (unsigned int)length, 
+                       command_print(cmd_ctx, "%u bytes written at address 0x%8.8x",
+                                                 (unsigned int)length,
                                                  ((unsigned int)(image.sections[i].base_address + offset)));
                }
 
@@ -4514,7 +4792,7 @@ static int handle_fast_load_image_command(struct command_context_s *cmd_ctx, cha
 
 static int handle_fast_load_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc)
 {
-       if (argc>0)
+       if (argc > 0)
                return ERROR_COMMAND_SYNTAX_ERROR;
        if (fastload == NULL)
        {
@@ -4525,11 +4803,11 @@ static int handle_fast_load_command(struct command_context_s *cmd_ctx, char *cmd
        int ms = timeval_ms();
        int size = 0;
        int retval = ERROR_OK;
-       for (i = 0; i<fastload_num;i++)
+       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", 
-                                         (unsigned int)(fastload[i].address), 
+               command_print(cmd_ctx, "Write to 0x%08x, length 0x%08x",
+                                         (unsigned int)(fastload[i].address),
                                          (unsigned int)(fastload[i].length));
                if (retval == ERROR_OK)
                {
@@ -4542,10 +4820,88 @@ static int handle_fast_load_command(struct command_context_s *cmd_ctx, char *cmd
        return retval;
 }
 
+static int jim_mcrmrc(Jim_Interp *interp, int argc, Jim_Obj *const *argv)
+{
+       command_context_t *context;
+       target_t *target;
+       int retval;
 
-/*
- * Local Variables: 
- * c-basic-offset: 4
- * tab-width: 4
- * End:
- */
+       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;
+       }
+
+       if ((argc < 6) || (argc > 7))
+       {
+               return JIM_ERR;
+       }
+
+       int cpnum;
+       uint32_t op1;
+       uint32_t op2;
+       uint32_t CRn;
+       uint32_t CRm;
+       uint32_t value;
+
+       int e;
+       long l;
+       e = Jim_GetLong(interp, argv[1], &l);
+       if (e != JIM_OK) {
+               return e;
+       }
+       cpnum = l;
+
+       e = Jim_GetLong(interp, argv[2], &l);
+       if (e != JIM_OK) {
+               return e;
+       }
+       op1 = l;
+
+       e = Jim_GetLong(interp, argv[3], &l);
+       if (e != JIM_OK) {
+               return e;
+       }
+       op2 = l;
+
+       e = Jim_GetLong(interp, argv[4], &l);
+       if (e != JIM_OK) {
+               return e;
+       }
+       CRn = l;
+
+       e = Jim_GetLong(interp, argv[5], &l);
+       if (e != JIM_OK) {
+               return e;
+       }
+       CRm = l;
+
+       value = 0;
+
+       if (argc == 7)
+       {
+               e = Jim_GetLong(interp, argv[6], &l);
+               if (e != JIM_OK) {
+                       return e;
+               }
+               value = l;
+
+               retval = target_mcr(target, cpnum, op1, op2, CRn, CRm, value);
+               if (retval != ERROR_OK)
+                       return JIM_ERR;
+       } else
+       {
+               retval = target_mrc(target, cpnum, op1, op2, CRn, CRm, &value);
+               if (retval != ERROR_OK)
+                       return JIM_ERR;
+
+               Jim_SetResult(interp, Jim_NewIntObj(interp, value));
+       }
+
+       return JIM_OK;
+}

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