target: add Espressif ESP32 basic support
[fw/openocd] / src / target / target.c
index c0953a3f1ca666eebc4deec6bf75f6eb0308579a..ea49b79722561ea4b348585a0f5d8f328799e1f8 100644 (file)
@@ -41,6 +41,7 @@
 #include "config.h"
 #endif
 
+#include <helper/align.h>
 #include <helper/time_support.h>
 #include <jtag/jtag.h>
 #include <flash/nor/core.h>
@@ -55,6 +56,8 @@
 #include "rtos/rtos.h"
 #include "transport/transport.h"
 #include "arm_cti.h"
+#include "smp.h"
+#include "semihosting_common.h"
 
 /* default halt wait timeout (ms) */
 #define DEFAULT_HALT_TIMEOUT 5000
@@ -72,8 +75,6 @@ static int target_get_gdb_fileio_info_default(struct target *target,
                struct gdb_fileio_info *fileio_info);
 static int target_gdb_fileio_end_default(struct target *target, int retcode,
                int fileio_errno, bool ctrl_c);
-static int target_profiling_default(struct target *target, uint32_t *samples,
-               uint32_t max_num_samples, uint32_t *num_samples, uint32_t seconds);
 
 /* targets */
 extern struct target_type arm7tdmi_target;
@@ -104,6 +105,8 @@ extern struct target_type hla_target;
 extern struct target_type nds32_v2_target;
 extern struct target_type nds32_v3_target;
 extern struct target_type nds32_v3m_target;
+extern struct target_type esp32_target;
+extern struct target_type esp32s2_target;
 extern struct target_type or1k_target;
 extern struct target_type quark_x10xx_target;
 extern struct target_type quark_d20xx_target;
@@ -140,6 +143,8 @@ static struct target_type *target_types[] = {
        &nds32_v2_target,
        &nds32_v3_target,
        &nds32_v3m_target,
+       &esp32_target,
+       &esp32s2_target,
        &or1k_target,
        &quark_x10xx_target,
        &quark_d20xx_target,
@@ -156,11 +161,13 @@ static struct target_type *target_types[] = {
 struct target *all_targets;
 static struct target_event_callback *target_event_callbacks;
 static struct target_timer_callback *target_timer_callbacks;
-LIST_HEAD(target_reset_callback_list);
-LIST_HEAD(target_trace_callback_list);
-static const int polling_interval = 100;
+static int64_t target_timer_next_event_value;
+static LIST_HEAD(target_reset_callback_list);
+static LIST_HEAD(target_trace_callback_list);
+static const int polling_interval = TARGET_DEFAULT_POLLING_INTERVAL;
+static LIST_HEAD(empty_smp_targets);
 
-static const Jim_Nvp nvp_assert[] = {
+static const struct jim_nvp nvp_assert[] = {
        { .name = "assert", NVP_ASSERT },
        { .name = "deassert", NVP_DEASSERT },
        { .name = "T", NVP_ASSERT },
@@ -170,16 +177,16 @@ static const Jim_Nvp nvp_assert[] = {
        { .name = NULL, .value = -1 }
 };
 
-static const Jim_Nvp nvp_error_target[] = {
+static const struct jim_nvp nvp_error_target[] = {
        { .value = ERROR_TARGET_INVALID, .name = "err-invalid" },
        { .value = ERROR_TARGET_INIT_FAILED, .name = "err-init-failed" },
        { .value = ERROR_TARGET_TIMEOUT, .name = "err-timeout" },
        { .value = ERROR_TARGET_NOT_HALTED, .name = "err-not-halted" },
        { .value = ERROR_TARGET_FAILURE, .name = "err-failure" },
-       { .value = ERROR_TARGET_UNALIGNED_ACCESS   , .name = "err-unaligned-access" },
-       { .value = ERROR_TARGET_DATA_ABORT , .name = "err-data-abort" },
-       { .value = ERROR_TARGET_RESOURCE_NOT_AVAILABLE , .name = "err-resource-not-available" },
-       { .value = ERROR_TARGET_TRANSLATION_FAULT  , .name = "err-translation-fault" },
+       { .value = ERROR_TARGET_UNALIGNED_ACCESS, .name = "err-unaligned-access" },
+       { .value = ERROR_TARGET_DATA_ABORT, .name = "err-data-abort" },
+       { .value = ERROR_TARGET_RESOURCE_NOT_AVAILABLE, .name = "err-resource-not-available" },
+       { .value = ERROR_TARGET_TRANSLATION_FAULT, .name = "err-translation-fault" },
        { .value = ERROR_TARGET_NOT_RUNNING, .name = "err-not-running" },
        { .value = ERROR_TARGET_NOT_EXAMINED, .name = "err-not-examined" },
        { .value = -1, .name = NULL }
@@ -187,16 +194,16 @@ static const Jim_Nvp nvp_error_target[] = {
 
 static const char *target_strerror_safe(int err)
 {
-       const Jim_Nvp *n;
+       const struct 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)
                return "unknown";
        else
                return n->name;
 }
 
-static const Jim_Nvp nvp_target_event[] = {
+static const struct jim_nvp nvp_target_event[] = {
 
        { .value = TARGET_EVENT_GDB_HALT, .name = "gdb-halt" },
        { .value = TARGET_EVENT_HALTED, .name = "halted" },
@@ -229,17 +236,26 @@ static const Jim_Nvp nvp_target_event[] = {
        { .value = TARGET_EVENT_GDB_DETACH, .name = "gdb-detach" },
 
        { .value = TARGET_EVENT_GDB_FLASH_WRITE_START, .name = "gdb-flash-write-start" },
-       { .value = TARGET_EVENT_GDB_FLASH_WRITE_END  , .name = "gdb-flash-write-end"   },
+       { .value = TARGET_EVENT_GDB_FLASH_WRITE_END,   .name = "gdb-flash-write-end"   },
 
        { .value = TARGET_EVENT_GDB_FLASH_ERASE_START, .name = "gdb-flash-erase-start" },
-       { .value = TARGET_EVENT_GDB_FLASH_ERASE_END  , .name = "gdb-flash-erase-end" },
+       { .value = TARGET_EVENT_GDB_FLASH_ERASE_END,   .name = "gdb-flash-erase-end" },
 
        { .value = TARGET_EVENT_TRACE_CONFIG, .name = "trace-config" },
 
+       { .value = TARGET_EVENT_SEMIHOSTING_USER_CMD_0x100, .name = "semihosting-user-cmd-0x100" },
+       { .value = TARGET_EVENT_SEMIHOSTING_USER_CMD_0x101, .name = "semihosting-user-cmd-0x101" },
+       { .value = TARGET_EVENT_SEMIHOSTING_USER_CMD_0x102, .name = "semihosting-user-cmd-0x102" },
+       { .value = TARGET_EVENT_SEMIHOSTING_USER_CMD_0x103, .name = "semihosting-user-cmd-0x103" },
+       { .value = TARGET_EVENT_SEMIHOSTING_USER_CMD_0x104, .name = "semihosting-user-cmd-0x104" },
+       { .value = TARGET_EVENT_SEMIHOSTING_USER_CMD_0x105, .name = "semihosting-user-cmd-0x105" },
+       { .value = TARGET_EVENT_SEMIHOSTING_USER_CMD_0x106, .name = "semihosting-user-cmd-0x106" },
+       { .value = TARGET_EVENT_SEMIHOSTING_USER_CMD_0x107, .name = "semihosting-user-cmd-0x107" },
+
        { .name = NULL, .value = -1 }
 };
 
-static const Jim_Nvp nvp_target_state[] = {
+static const struct jim_nvp nvp_target_state[] = {
        { .name = "unknown", .value = TARGET_UNKNOWN },
        { .name = "running", .value = TARGET_RUNNING },
        { .name = "halted",  .value = TARGET_HALTED },
@@ -248,20 +264,20 @@ static const Jim_Nvp nvp_target_state[] = {
        { .name = NULL, .value = -1 },
 };
 
-static const Jim_Nvp nvp_target_debug_reason[] = {
-       { .name = "debug-request"            , .value = DBG_REASON_DBGRQ },
-       { .name = "breakpoint"               , .value = DBG_REASON_BREAKPOINT },
-       { .name = "watchpoint"               , .value = DBG_REASON_WATCHPOINT },
+static const struct jim_nvp nvp_target_debug_reason[] = {
+       { .name = "debug-request",             .value = DBG_REASON_DBGRQ },
+       { .name = "breakpoint",                .value = DBG_REASON_BREAKPOINT },
+       { .name = "watchpoint",                .value = DBG_REASON_WATCHPOINT },
        { .name = "watchpoint-and-breakpoint", .value = DBG_REASON_WPTANDBKPT },
-       { .name = "single-step"              , .value = DBG_REASON_SINGLESTEP },
-       { .name = "target-not-halted"        , .value = DBG_REASON_NOTHALTED  },
-       { .name = "program-exit"             , .value = DBG_REASON_EXIT },
-       { .name = "exception-catch"          , .value = DBG_REASON_EXC_CATCH },
-       { .name = "undefined"                , .value = DBG_REASON_UNDEFINED },
+       { .name = "single-step",               .value = DBG_REASON_SINGLESTEP },
+       { .name = "target-not-halted",         .value = DBG_REASON_NOTHALTED  },
+       { .name = "program-exit",              .value = DBG_REASON_EXIT },
+       { .name = "exception-catch",           .value = DBG_REASON_EXC_CATCH },
+       { .name = "undefined",                 .value = DBG_REASON_UNDEFINED },
        { .name = NULL, .value = -1 },
 };
 
-static const Jim_Nvp nvp_target_endian[] = {
+static const struct jim_nvp nvp_target_endian[] = {
        { .name = "big",    .value = TARGET_BIG_ENDIAN },
        { .name = "little", .value = TARGET_LITTLE_ENDIAN },
        { .name = "be",     .value = TARGET_BIG_ENDIAN },
@@ -269,19 +285,19 @@ static const Jim_Nvp nvp_target_endian[] = {
        { .name = NULL,     .value = -1 },
 };
 
-static const Jim_Nvp nvp_reset_modes[] = {
+static const struct jim_nvp nvp_reset_modes[] = {
        { .name = "unknown", .value = RESET_UNKNOWN },
-       { .name = "run"    , .value = RESET_RUN },
-       { .name = "halt"   , .value = RESET_HALT },
-       { .name = "init"   , .value = RESET_INIT },
-       { .name = NULL     , .value = -1 },
+       { .name = "run",     .value = RESET_RUN },
+       { .name = "halt",    .value = RESET_HALT },
+       { .name = "init",    .value = RESET_INIT },
+       { .name = NULL,      .value = -1 },
 };
 
 const char *debug_reason_name(struct target *t)
 {
        const char *cp;
 
-       cp = Jim_Nvp_value2name_simple(nvp_target_debug_reason,
+       cp = jim_nvp_value2name_simple(nvp_target_debug_reason,
                        t->debug_reason)->name;
        if (!cp) {
                LOG_ERROR("Invalid debug reason: %d", (int)(t->debug_reason));
@@ -293,7 +309,7 @@ const char *debug_reason_name(struct target *t)
 const char *target_state_name(struct target *t)
 {
        const char *cp;
-       cp = Jim_Nvp_value2name_simple(nvp_target_state, t->state)->name;
+       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*)";
@@ -308,7 +324,7 @@ const char *target_state_name(struct target *t)
 const char *target_event_name(enum target_event event)
 {
        const char *cp;
-       cp = Jim_Nvp_value2name_simple(nvp_target_event, event)->name;
+       cp = jim_nvp_value2name_simple(nvp_target_event, event)->name;
        if (!cp) {
                LOG_ERROR("Invalid target event: %d", (int)(event));
                cp = "(*BUG*unknown*BUG*)";
@@ -319,7 +335,7 @@ const char *target_event_name(enum target_event event)
 const char *target_reset_mode_name(enum target_reset_mode reset_mode)
 {
        const char *cp;
-       cp = Jim_Nvp_value2name_simple(nvp_reset_modes, reset_mode)->name;
+       cp = jim_nvp_value2name_simple(nvp_reset_modes, reset_mode)->name;
        if (!cp) {
                LOG_ERROR("Invalid target reset mode: %d", (int)(reset_mode));
                cp = "(*BUG*unknown*BUG*)";
@@ -344,6 +360,15 @@ static int new_target_number(void)
        return x + 1;
 }
 
+static void append_to_list_all_targets(struct target *target)
+{
+       struct target **t = &all_targets;
+
+       while (*t)
+               t = &((*t)->next);
+       *t = target;
+}
+
 /* read a uint64_t from a buffer in target memory endianness */
 uint64_t target_buffer_get_u64(struct target *target, const uint8_t *buffer)
 {
@@ -477,7 +502,7 @@ struct target *get_target(const char *id)
 
        /* try as tcltarget name */
        for (target = all_targets; target; target = target->next) {
-               if (target_name(target) == NULL)
+               if (!target_name(target))
                        continue;
                if (strcmp(id, target_name(target)) == 0)
                        return target;
@@ -519,7 +544,7 @@ struct target *get_current_target(struct command_context *cmd_ctx)
 {
        struct target *target = get_current_target_or_null(cmd_ctx);
 
-       if (target == NULL) {
+       if (!target) {
                LOG_ERROR("BUG: current_target out of bounds");
                exit(-1);
        }
@@ -593,7 +618,7 @@ int target_halt(struct target *target)
  * @param address Optionally used as the program counter.
  * @param handle_breakpoints True iff breakpoints at the resumption PC
  *     should be skipped.  (For example, maybe execution was stopped by
- *     such a breakpoint, in which case it would be counterprodutive to
+ *     such a breakpoint, in which case it would be counterproductive to
  *     let it re-trigger.
  * @param debug_execution False if all working areas allocated by OpenOCD
  *     should be released and/or restored to their original contents.
@@ -630,7 +655,18 @@ int target_resume(struct target *target, int current, target_addr_t address,
         * we poll. The CPU can even halt at the current PC as a result of
         * a software breakpoint being inserted by (a bug?) the application.
         */
+       /*
+        * resume() triggers the event 'resumed'. The execution of TCL commands
+        * in the event handler causes the polling of targets. If the target has
+        * already halted for a breakpoint, polling will run the 'halted' event
+        * handler before the pending 'resumed' handler.
+        * Disable polling during resume() to guarantee the execution of handlers
+        * in the correct order.
+        */
+       bool save_poll = jtag_poll_get_enabled();
+       jtag_poll_set_enabled(false);
        retval = target->type->resume(target, current, address, handle_breakpoints, debug_execution);
+       jtag_poll_set_enabled(save_poll);
        if (retval != ERROR_OK)
                return retval;
 
@@ -643,9 +679,9 @@ static int target_process_reset(struct command_invocation *cmd, enum target_rese
 {
        char buf[100];
        int retval;
-       Jim_Nvp *n;
-       n = Jim_Nvp_value2name_simple(nvp_reset_modes, reset_mode);
-       if (n->name == NULL) {
+       struct jim_nvp *n;
+       n = jim_nvp_value2name_simple(nvp_reset_modes, reset_mode);
+       if (!n->name) {
                LOG_ERROR("invalid reset mode");
                return ERROR_FAIL;
        }
@@ -697,6 +733,15 @@ static int no_mmu(struct target *target, int *enabled)
        return ERROR_OK;
 }
 
+/**
+ * Reset the @c examined flag for the given target.
+ * Pure paranoia -- targets are zeroed on allocation.
+ */
+static inline void target_reset_examined(struct target *target)
+{
+       target->examined = false;
+}
+
 static int default_examine(struct target *target)
 {
        target_set_examined(target);
@@ -709,7 +754,7 @@ static int default_check_reset(struct target *target)
        return ERROR_OK;
 }
 
-/* Equvivalent Tcl code arp_examine_one is in src/target/startup.tcl
+/* Equivalent Tcl code arp_examine_one is in src/target/startup.tcl
  * Keep in sync */
 int target_examine_one(struct target *target)
 {
@@ -717,10 +762,12 @@ int target_examine_one(struct target *target)
 
        int retval = target->type->examine(target);
        if (retval != ERROR_OK) {
+               target_reset_examined(target);
                target_call_event_callbacks(target, TARGET_EVENT_EXAMINE_FAIL);
                return retval;
        }
 
+       target_set_examined(target);
        target_call_event_callbacks(target, TARGET_EVENT_EXAMINE_END);
 
        return ERROR_OK;
@@ -759,9 +806,11 @@ int target_examine(void)
                if (target->defer_examine)
                        continue;
 
-               retval = target_examine_one(target);
-               if (retval != ERROR_OK)
-                       return retval;
+               int retval2 = target_examine_one(target);
+               if (retval2 != ERROR_OK) {
+                       LOG_WARNING("target %s examination failed", target_name(target));
+                       retval = retval2;
+               }
        }
        return retval;
 }
@@ -794,12 +843,19 @@ static int target_soft_reset_halt(struct target *target)
  * algorithm.
  *
  * @param target used to run the algorithm
+ * @param num_mem_params
+ * @param mem_params
+ * @param num_reg_params
+ * @param reg_param
+ * @param entry_point
+ * @param exit_point
+ * @param timeout_ms
  * @param arch_info target-specific description of the algorithm.
  */
 int target_run_algorithm(struct target *target,
                int num_mem_params, struct mem_param *mem_params,
                int num_reg_params, struct reg_param *reg_param,
-               uint32_t entry_point, uint32_t exit_point,
+               target_addr_t entry_point, target_addr_t exit_point,
                int timeout_ms, void *arch_info)
 {
        int retval = ERROR_FAIL;
@@ -829,12 +885,18 @@ done:
  * Executes a target-specific native code algorithm and leaves it running.
  *
  * @param target used to run the algorithm
+ * @param num_mem_params
+ * @param mem_params
+ * @param num_reg_params
+ * @param reg_params
+ * @param entry_point
+ * @param exit_point
  * @param arch_info target-specific description of the algorithm.
  */
 int target_start_algorithm(struct target *target,
                int num_mem_params, struct mem_param *mem_params,
                int num_reg_params, struct reg_param *reg_params,
-               uint32_t entry_point, uint32_t exit_point,
+               target_addr_t entry_point, target_addr_t exit_point,
                void *arch_info)
 {
        int retval = ERROR_FAIL;
@@ -867,12 +929,18 @@ done:
  * Waits for an algorithm started with target_start_algorithm() to complete.
  *
  * @param target used to run the algorithm
+ * @param num_mem_params
+ * @param mem_params
+ * @param num_reg_params
+ * @param reg_params
+ * @param exit_point
+ * @param timeout_ms
  * @param arch_info target-specific description of the algorithm.
  */
 int target_wait_algorithm(struct target *target,
                int num_mem_params, struct mem_param *mem_params,
                int num_reg_params, struct reg_param *reg_params,
-               uint32_t exit_point, int timeout_ms,
+               target_addr_t exit_point, int timeout_ms,
                void *arch_info)
 {
        int retval = ERROR_FAIL;
@@ -938,6 +1006,7 @@ done:
  * @param entry_point address on the target to execute to start the algorithm
  * @param exit_point address at which to set a breakpoint to catch the
  *     end of the algorithm; can be 0 if target triggers a breakpoint itself
+ * @param arch_info
  */
 
 int target_run_flash_async_algorithm(struct target *target,
@@ -963,7 +1032,7 @@ int target_run_flash_async_algorithm(struct target *target,
        uint32_t rp = fifo_start_addr;
 
        /* validate block_size is 2^n */
-       assert(!block_size || !(block_size & (block_size - 1)));
+       assert(IS_PWR_OF_2(block_size));
 
        retval = target_write_u32(target, wp_addr, wp);
        if (retval != ERROR_OK)
@@ -1001,7 +1070,7 @@ int target_run_flash_async_algorithm(struct target *target,
                        break;
                }
 
-               if (((rp - fifo_start_addr) & (block_size - 1)) || rp < fifo_start_addr || rp >= fifo_end_addr) {
+               if (!IS_ALIGNED(rp - fifo_start_addr, block_size) || rp < fifo_start_addr || rp >= fifo_end_addr) {
                        LOG_ERROR("corrupted fifo read pointer 0x%" PRIx32, rp);
                        break;
                }
@@ -1022,11 +1091,11 @@ int target_run_flash_async_algorithm(struct target *target,
                         * programming. The exact delay shouldn't matter as long as it's
                         * less than buffer size / flash speed. This is very unlikely to
                         * run when using high latency connections such as USB. */
-                       alive_sleep(10);
+                       alive_sleep(2);
 
                        /* to stop an infinite loop on some targets check and increment a timeout
                         * this issue was observed on a stellaris using the new ICDI interface */
-                       if (timeout++ >= 500) {
+                       if (timeout++ >= 2500) {
                                LOG_ERROR("timeout waiting for algorithm, a target reset is recommended");
                                return ERROR_FLASH_OPERATION_FAILED;
                        }
@@ -1040,6 +1109,10 @@ int target_run_flash_async_algorithm(struct target *target,
                if (thisrun_bytes > count * block_size)
                        thisrun_bytes = count * block_size;
 
+               /* Force end of large blocks to be word aligned */
+               if (thisrun_bytes >= 16)
+                       thisrun_bytes -= (rp + thisrun_bytes) & 0x03;
+
                /* Write data to fifo */
                retval = target_write_buffer(target, wp, thisrun_bytes, buffer);
                if (retval != ERROR_OK)
@@ -1089,6 +1162,156 @@ int target_run_flash_async_algorithm(struct target *target,
        return retval;
 }
 
+int target_run_read_async_algorithm(struct target *target,
+               uint8_t *buffer, uint32_t count, int block_size,
+               int num_mem_params, struct mem_param *mem_params,
+               int num_reg_params, struct reg_param *reg_params,
+               uint32_t buffer_start, uint32_t buffer_size,
+               uint32_t entry_point, uint32_t exit_point, void *arch_info)
+{
+       int retval;
+       int timeout = 0;
+
+       const uint8_t *buffer_orig = buffer;
+
+       /* Set up working area. First word is write pointer, second word is read pointer,
+        * rest is fifo data area. */
+       uint32_t wp_addr = buffer_start;
+       uint32_t rp_addr = buffer_start + 4;
+       uint32_t fifo_start_addr = buffer_start + 8;
+       uint32_t fifo_end_addr = buffer_start + buffer_size;
+
+       uint32_t wp = fifo_start_addr;
+       uint32_t rp = fifo_start_addr;
+
+       /* validate block_size is 2^n */
+       assert(IS_PWR_OF_2(block_size));
+
+       retval = target_write_u32(target, wp_addr, wp);
+       if (retval != ERROR_OK)
+               return retval;
+       retval = target_write_u32(target, rp_addr, rp);
+       if (retval != ERROR_OK)
+               return retval;
+
+       /* Start up algorithm on target */
+       retval = target_start_algorithm(target, num_mem_params, mem_params,
+                       num_reg_params, reg_params,
+                       entry_point,
+                       exit_point,
+                       arch_info);
+
+       if (retval != ERROR_OK) {
+               LOG_ERROR("error starting target flash read algorithm");
+               return retval;
+       }
+
+       while (count > 0) {
+               retval = target_read_u32(target, wp_addr, &wp);
+               if (retval != ERROR_OK) {
+                       LOG_ERROR("failed to get write pointer");
+                       break;
+               }
+
+               LOG_DEBUG("offs 0x%zx count 0x%" PRIx32 " wp 0x%" PRIx32 " rp 0x%" PRIx32,
+                       (size_t)(buffer - buffer_orig), count, wp, rp);
+
+               if (wp == 0) {
+                       LOG_ERROR("flash read algorithm aborted by target");
+                       retval = ERROR_FLASH_OPERATION_FAILED;
+                       break;
+               }
+
+               if (!IS_ALIGNED(wp - fifo_start_addr, block_size) || wp < fifo_start_addr || wp >= fifo_end_addr) {
+                       LOG_ERROR("corrupted fifo write pointer 0x%" PRIx32, wp);
+                       break;
+               }
+
+               /* Count the number of bytes available in the fifo without
+                * crossing the wrap around. */
+               uint32_t thisrun_bytes;
+               if (wp >= rp)
+                       thisrun_bytes = wp - rp;
+               else
+                       thisrun_bytes = fifo_end_addr - rp;
+
+               if (thisrun_bytes == 0) {
+                       /* Throttle polling a bit if transfer is (much) faster than flash
+                        * reading. The exact delay shouldn't matter as long as it's
+                        * less than buffer size / flash speed. This is very unlikely to
+                        * run when using high latency connections such as USB. */
+                       alive_sleep(2);
+
+                       /* to stop an infinite loop on some targets check and increment a timeout
+                        * this issue was observed on a stellaris using the new ICDI interface */
+                       if (timeout++ >= 2500) {
+                               LOG_ERROR("timeout waiting for algorithm, a target reset is recommended");
+                               return ERROR_FLASH_OPERATION_FAILED;
+                       }
+                       continue;
+               }
+
+               /* Reset our timeout */
+               timeout = 0;
+
+               /* Limit to the amount of data we actually want to read */
+               if (thisrun_bytes > count * block_size)
+                       thisrun_bytes = count * block_size;
+
+               /* Force end of large blocks to be word aligned */
+               if (thisrun_bytes >= 16)
+                       thisrun_bytes -= (rp + thisrun_bytes) & 0x03;
+
+               /* Read data from fifo */
+               retval = target_read_buffer(target, rp, thisrun_bytes, buffer);
+               if (retval != ERROR_OK)
+                       break;
+
+               /* Update counters and wrap write pointer */
+               buffer += thisrun_bytes;
+               count -= thisrun_bytes / block_size;
+               rp += thisrun_bytes;
+               if (rp >= fifo_end_addr)
+                       rp = fifo_start_addr;
+
+               /* Store updated write pointer to target */
+               retval = target_write_u32(target, rp_addr, rp);
+               if (retval != ERROR_OK)
+                       break;
+
+               /* Avoid GDB timeouts */
+               keep_alive();
+
+       }
+
+       if (retval != ERROR_OK) {
+               /* abort flash write algorithm on target */
+               target_write_u32(target, rp_addr, 0);
+       }
+
+       int retval2 = target_wait_algorithm(target, num_mem_params, mem_params,
+                       num_reg_params, reg_params,
+                       exit_point,
+                       10000,
+                       arch_info);
+
+       if (retval2 != ERROR_OK) {
+               LOG_ERROR("error waiting for target flash write algorithm");
+               retval = retval2;
+       }
+
+       if (retval == ERROR_OK) {
+               /* check if algorithm set wp = 0 after fifo writer loop finished */
+               retval = target_read_u32(target, wp_addr, &wp);
+               if (retval == ERROR_OK && wp == 0) {
+                       LOG_ERROR("flash read algorithm aborted by target");
+                       retval = ERROR_FLASH_OPERATION_FAILED;
+               }
+       }
+
+       return retval;
+}
+
 int target_read_memory(struct target *target,
                target_addr_t address, uint32_t size, uint32_t count, uint8_t *buffer)
 {
@@ -1203,7 +1426,7 @@ int target_hit_watchpoint(struct target *target,
                return ERROR_TARGET_NOT_HALTED;
        }
 
-       if (target->type->hit_watchpoint == NULL) {
+       if (!target->type->hit_watchpoint) {
                /* For backward compatible, if hit_watchpoint is not implemented,
                 * return ERROR_FAIL such that gdb_server will not take the nonsense
                 * information. */
@@ -1215,7 +1438,7 @@ int target_hit_watchpoint(struct target *target,
 
 const char *target_get_gdb_arch(struct target *target)
 {
-       if (target->type->get_gdb_arch == NULL)
+       if (!target->type->get_gdb_arch)
                return NULL;
        return target->type->get_gdb_arch(target);
 }
@@ -1224,8 +1447,17 @@ int target_get_gdb_reg_list(struct target *target,
                struct reg **reg_list[], int *reg_list_size,
                enum target_register_class reg_class)
 {
-       int result = target->type->get_gdb_reg_list(target, reg_list,
+       int result = ERROR_FAIL;
+
+       if (!target_was_examined(target)) {
+               LOG_ERROR("Target not examined yet");
+               goto done;
+       }
+
+       result = target->type->get_gdb_reg_list(target, reg_list,
                        reg_list_size, reg_class);
+
+done:
        if (result != ERROR_OK) {
                *reg_list = NULL;
                *reg_list_size = 0;
@@ -1247,10 +1479,10 @@ int target_get_gdb_reg_list_noread(struct target *target,
 bool target_supports_gdb_connection(struct target *target)
 {
        /*
-        * based on current code, we can simply exclude all the targets that
-        * don't provide get_gdb_reg_list; this could change with new targets.
+        * exclude all the targets that don't provide get_gdb_reg_list
+        * or that have explicit gdb_max_connection == 0
         */
-       return !!target->type->get_gdb_reg_list;
+       return !!target->type->get_gdb_reg_list && !!target->gdb_max_connections;
 }
 
 int target_step(struct target *target,
@@ -1303,24 +1535,18 @@ unsigned target_address_bits(struct target *target)
        return 32;
 }
 
-int target_profiling(struct target *target, uint32_t *samples,
-                       uint32_t max_num_samples, uint32_t *num_samples, uint32_t seconds)
+unsigned int target_data_bits(struct target *target)
 {
-       if (target->state != TARGET_HALTED) {
-               LOG_WARNING("target %s is not halted (profiling)", target->cmd_name);
-               return ERROR_TARGET_NOT_HALTED;
-       }
-       return target->type->profiling(target, samples, max_num_samples,
-                       num_samples, seconds);
+       if (target->type->data_bits)
+               return target->type->data_bits(target);
+       return 32;
 }
 
-/**
- * Reset the @c examined flag for the given target.
- * Pure paranoia -- targets are zeroed on allocation.
- */
-static void target_reset_examined(struct target *target)
+static int target_profiling(struct target *target, uint32_t *samples,
+                       uint32_t max_num_samples, uint32_t *num_samples, uint32_t seconds)
 {
-       target->examined = false;
+       return target->type->profiling(target, samples, max_num_samples,
+                       num_samples, seconds);
 }
 
 static int handle_target(void *priv);
@@ -1331,16 +1557,16 @@ static int target_init_one(struct command_context *cmd_ctx,
        target_reset_examined(target);
 
        struct target_type *type = target->type;
-       if (type->examine == NULL)
+       if (!type->examine)
                type->examine = default_examine;
 
-       if (type->check_reset == NULL)
+       if (!type->check_reset)
                type->check_reset = default_check_reset;
 
-       assert(type->init_target != NULL);
+       assert(type->init_target);
 
        int retval = type->init_target(cmd_ctx, target);
-       if (ERROR_OK != retval) {
+       if (retval != ERROR_OK) {
                LOG_ERROR("target '%s' init failed", target_name(target));
                return retval;
        }
@@ -1349,7 +1575,7 @@ static int target_init_one(struct command_context *cmd_ctx,
         * implement it in stages, but warn if we need to do so.
         */
        if (type->mmu) {
-               if (type->virt2phys == NULL) {
+               if (!type->virt2phys) {
                        LOG_ERROR("type '%s' is missing virt2phys", type->name);
                        type->virt2phys = identity_virt2phys;
                }
@@ -1367,19 +1593,19 @@ static int target_init_one(struct command_context *cmd_ctx,
                type->virt2phys = identity_virt2phys;
        }
 
-       if (target->type->read_buffer == NULL)
+       if (!target->type->read_buffer)
                target->type->read_buffer = target_read_buffer_default;
 
-       if (target->type->write_buffer == NULL)
+       if (!target->type->write_buffer)
                target->type->write_buffer = target_write_buffer_default;
 
-       if (target->type->get_gdb_fileio_info == NULL)
+       if (!target->type->get_gdb_fileio_info)
                target->type->get_gdb_fileio_info = target_get_gdb_fileio_info_default;
 
-       if (target->type->gdb_fileio_end == NULL)
+       if (!target->type->gdb_fileio_end)
                target->type->gdb_fileio_end = target_gdb_fileio_end_default;
 
-       if (target->type->profiling == NULL)
+       if (!target->type->profiling)
                target->type->profiling = target_profiling_default;
 
        return ERROR_OK;
@@ -1392,7 +1618,7 @@ static int target_init(struct command_context *cmd_ctx)
 
        for (target = all_targets; target; target = target->next) {
                retval = target_init_one(cmd_ctx, target);
-               if (ERROR_OK != retval)
+               if (retval != ERROR_OK)
                        return retval;
        }
 
@@ -1400,12 +1626,12 @@ static int target_init(struct command_context *cmd_ctx)
                return ERROR_OK;
 
        retval = target_register_user_commands(cmd_ctx);
-       if (ERROR_OK != retval)
+       if (retval != ERROR_OK)
                return retval;
 
        retval = target_register_timer_callback(&handle_target,
                        polling_interval, TARGET_TIMER_TYPE_PERIODIC, cmd_ctx->interp);
-       if (ERROR_OK != retval)
+       if (retval != ERROR_OK)
                return retval;
 
        return ERROR_OK;
@@ -1426,15 +1652,15 @@ COMMAND_HANDLER(handle_target_init_command)
        target_initialized = true;
 
        retval = command_run_line(CMD_CTX, "init_targets");
-       if (ERROR_OK != retval)
+       if (retval != ERROR_OK)
                return retval;
 
        retval = command_run_line(CMD_CTX, "init_target_events");
-       if (ERROR_OK != retval)
+       if (retval != ERROR_OK)
                return retval;
 
        retval = command_run_line(CMD_CTX, "init_board");
-       if (ERROR_OK != retval)
+       if (retval != ERROR_OK)
                return retval;
 
        LOG_DEBUG("Initializing targets...");
@@ -1446,7 +1672,7 @@ int target_register_event_callback(int (*callback)(struct target *target,
 {
        struct target_event_callback **callbacks_p = &target_event_callbacks;
 
-       if (callback == NULL)
+       if (!callback)
                return ERROR_COMMAND_SYNTAX_ERROR;
 
        if (*callbacks_p) {
@@ -1468,11 +1694,11 @@ int target_register_reset_callback(int (*callback)(struct target *target,
 {
        struct target_reset_callback *entry;
 
-       if (callback == NULL)
+       if (!callback)
                return ERROR_COMMAND_SYNTAX_ERROR;
 
        entry = malloc(sizeof(struct target_reset_callback));
-       if (entry == NULL) {
+       if (!entry) {
                LOG_ERROR("error allocating buffer for reset callback entry");
                return ERROR_COMMAND_SYNTAX_ERROR;
        }
@@ -1490,11 +1716,11 @@ int target_register_trace_callback(int (*callback)(struct target *target,
 {
        struct target_trace_callback *entry;
 
-       if (callback == NULL)
+       if (!callback)
                return ERROR_COMMAND_SYNTAX_ERROR;
 
        entry = malloc(sizeof(struct target_trace_callback));
-       if (entry == NULL) {
+       if (!entry) {
                LOG_ERROR("error allocating buffer for trace callback entry");
                return ERROR_COMMAND_SYNTAX_ERROR;
        }
@@ -1512,7 +1738,7 @@ int target_register_timer_callback(int (*callback)(void *priv),
 {
        struct target_timer_callback **callbacks_p = &target_timer_callbacks;
 
-       if (callback == NULL)
+       if (!callback)
                return ERROR_COMMAND_SYNTAX_ERROR;
 
        if (*callbacks_p) {
@@ -1527,8 +1753,8 @@ int target_register_timer_callback(int (*callback)(void *priv),
        (*callbacks_p)->time_ms = time_ms;
        (*callbacks_p)->removed = false;
 
-       gettimeofday(&(*callbacks_p)->when, NULL);
-       timeval_add_time(&(*callbacks_p)->when, 0, time_ms * 1000);
+       (*callbacks_p)->when = timeval_ms() + time_ms;
+       target_timer_next_event_value = MIN(target_timer_next_event_value, (*callbacks_p)->when);
 
        (*callbacks_p)->priv = priv;
        (*callbacks_p)->next = NULL;
@@ -1542,7 +1768,7 @@ int target_unregister_event_callback(int (*callback)(struct target *target,
        struct target_event_callback **p = &target_event_callbacks;
        struct target_event_callback *c = target_event_callbacks;
 
-       if (callback == NULL)
+       if (!callback)
                return ERROR_COMMAND_SYNTAX_ERROR;
 
        while (c) {
@@ -1564,7 +1790,7 @@ int target_unregister_reset_callback(int (*callback)(struct target *target,
 {
        struct target_reset_callback *entry;
 
-       if (callback == NULL)
+       if (!callback)
                return ERROR_COMMAND_SYNTAX_ERROR;
 
        list_for_each_entry(entry, &target_reset_callback_list, list) {
@@ -1583,7 +1809,7 @@ int target_unregister_trace_callback(int (*callback)(struct target *target,
 {
        struct target_trace_callback *entry;
 
-       if (callback == NULL)
+       if (!callback)
                return ERROR_COMMAND_SYNTAX_ERROR;
 
        list_for_each_entry(entry, &target_trace_callback_list, list) {
@@ -1599,7 +1825,7 @@ int target_unregister_trace_callback(int (*callback)(struct target *target,
 
 int target_unregister_timer_callback(int (*callback)(void *priv), void *priv)
 {
-       if (callback == NULL)
+       if (!callback)
                return ERROR_COMMAND_SYNTAX_ERROR;
 
        for (struct target_timer_callback *c = target_timer_callbacks;
@@ -1624,7 +1850,7 @@ int target_call_event_callbacks(struct target *target, enum target_event event)
        }
 
        LOG_DEBUG("target event %i (%s) for core %s", event,
-                       Jim_Nvp_value2name_simple(nvp_target_event, event)->name,
+                       target_event_name(event),
                        target_name(target));
 
        target_handle_event(target, event);
@@ -1643,7 +1869,7 @@ int target_call_reset_callbacks(struct target *target, enum target_reset_mode re
        struct target_reset_callback *callback;
 
        LOG_DEBUG("target reset %i (%s)", reset_mode,
-                       Jim_Nvp_value2name_simple(nvp_reset_modes, reset_mode)->name);
+                       jim_nvp_value2name_simple(nvp_reset_modes, reset_mode)->name);
 
        list_for_each_entry(callback, &target_reset_callback_list, list)
                callback->callback(target, reset_mode, callback->priv);
@@ -1662,15 +1888,14 @@ int target_call_trace_callbacks(struct target *target, size_t len, uint8_t *data
 }
 
 static int target_timer_callback_periodic_restart(
-               struct target_timer_callback *cb, struct timeval *now)
+               struct target_timer_callback *cb, int64_t *now)
 {
-       cb->when = *now;
-       timeval_add_time(&cb->when, 0, cb->time_ms * 1000L);
+       cb->when = *now + cb->time_ms;
        return ERROR_OK;
 }
 
 static int target_call_timer_callback(struct target_timer_callback *cb,
-               struct timeval *now)
+               int64_t *now)
 {
        cb->callback(cb->priv);
 
@@ -1692,8 +1917,12 @@ static int target_call_timer_callbacks_check_time(int checktime)
 
        keep_alive();
 
-       struct timeval now;
-       gettimeofday(&now, NULL);
+       int64_t now = timeval_ms();
+
+       /* Initialize to a default value that's a ways into the future.
+        * The loop below will make it closer to now if there are
+        * callbacks that want to be called sooner. */
+       target_timer_next_event_value = now + 1000;
 
        /* Store an address of the place containing a pointer to the
         * next item; initially, that's a standalone "root of the
@@ -1709,11 +1938,14 @@ static int target_call_timer_callbacks_check_time(int checktime)
 
                bool call_it = (*callback)->callback &&
                        ((!checktime && (*callback)->type == TARGET_TIMER_TYPE_PERIODIC) ||
-                        timeval_compare(&now, &(*callback)->when) >= 0);
+                        now >= (*callback)->when);
 
                if (call_it)
                        target_call_timer_callback(*callback, &now);
 
+               if (!(*callback)->removed && (*callback)->when < target_timer_next_event_value)
+                       target_timer_next_event_value = (*callback)->when;
+
                callback = &(*callback)->next;
        }
 
@@ -1721,17 +1953,22 @@ static int target_call_timer_callbacks_check_time(int checktime)
        return ERROR_OK;
 }
 
-int target_call_timer_callbacks(void)
+int target_call_timer_callbacks()
 {
        return target_call_timer_callbacks_check_time(1);
 }
 
 /* invoke periodic callbacks immediately */
-int target_call_timer_callbacks_now(void)
+int target_call_timer_callbacks_now()
 {
        return target_call_timer_callbacks_check_time(0);
 }
 
+int64_t target_timer_next_event(void)
+{
+       return target_timer_next_event_value;
+}
+
 /* Prints the working area layout for debug purposes */
 static void print_wa_layout(struct target *target)
 {
@@ -1755,7 +1992,7 @@ static void target_split_working_area(struct working_area *area, uint32_t size)
        if (size < area->size) {
                struct working_area *new_wa = malloc(sizeof(*new_wa));
 
-               if (new_wa == NULL)
+               if (!new_wa)
                        return;
 
                new_wa->next = area->next;
@@ -1770,10 +2007,8 @@ static void target_split_working_area(struct working_area *area, uint32_t size)
 
                /* If backup memory was allocated to this area, it has the wrong size
                 * now so free it and it will be reallocated if/when needed */
-               if (area->backup) {
-                       free(area->backup);
-                       area->backup = NULL;
-               }
+               free(area->backup);
+               area->backup = NULL;
        }
 }
 
@@ -1793,16 +2028,13 @@ static void target_merge_working_areas(struct target *target)
                        /* Remove the last */
                        struct working_area *to_be_freed = c->next;
                        c->next = c->next->next;
-                       if (to_be_freed->backup)
-                               free(to_be_freed->backup);
+                       free(to_be_freed->backup);
                        free(to_be_freed);
 
                        /* If backup memory was allocated to the remaining area, it's has
                         * the wrong size now */
-                       if (c->backup) {
-                               free(c->backup);
-                               c->backup = NULL;
-                       }
+                       free(c->backup);
+                       c->backup = NULL;
                } else {
                        c = c->next;
                }
@@ -1812,7 +2044,7 @@ static void target_merge_working_areas(struct target *target)
 int target_alloc_working_area_try(struct target *target, uint32_t size, struct working_area **area)
 {
        /* Reevaluate working area address based on MMU state*/
-       if (target->working_areas == NULL) {
+       if (!target->working_areas) {
                int retval;
                int enabled;
 
@@ -1871,7 +2103,7 @@ int target_alloc_working_area_try(struct target *target, uint32_t size, struct w
                c = c->next;
        }
 
-       if (c == NULL)
+       if (!c)
                return ERROR_TARGET_RESOURCE_NOT_AVAILABLE;
 
        /* Split the working area into the requested size */
@@ -1881,9 +2113,9 @@ int target_alloc_working_area_try(struct target *target, uint32_t size, struct w
                          size, c->address);
 
        if (target->backup_working_area) {
-               if (c->backup == NULL) {
+               if (!c->backup) {
                        c->backup = malloc(c->size);
-                       if (c->backup == NULL)
+                       if (!c->backup)
                                return ERROR_FAIL;
                }
 
@@ -1919,7 +2151,7 @@ static int target_restore_working_area(struct target *target, struct working_are
 {
        int retval = ERROR_OK;
 
-       if (target->backup_working_area && area->backup != NULL) {
+       if (target->backup_working_area && area->backup) {
                retval = target_write_memory(target, area->address, 4, area->size / 4, area->backup);
                if (retval != ERROR_OK)
                        LOG_ERROR("failed to restore %" PRIu32 " bytes of working area at address " TARGET_ADDR_FMT,
@@ -1932,11 +2164,10 @@ static int target_restore_working_area(struct target *target, struct working_are
 /* Restore the area's backup memory, if any, and return the area to the allocation pool */
 static int target_free_working_area_restore(struct target *target, struct working_area *area, int restore)
 {
-       int retval = ERROR_OK;
-
-       if (area->free)
-               return retval;
+       if (!area || area->free)
+               return ERROR_OK;
 
+       int retval = ERROR_OK;
        if (restore) {
                retval = target_restore_working_area(target, area);
                /* REVISIT: Perhaps the area should be freed even if restoring fails. */
@@ -2014,7 +2245,7 @@ uint32_t target_get_working_area_avail(struct target *target)
        struct working_area *c = target->working_areas;
        uint32_t max_size = 0;
 
-       if (c == NULL)
+       if (!c)
                return target->working_area_size;
 
        while (c) {
@@ -2033,7 +2264,8 @@ static void target_destroy(struct target *target)
                target->type->deinit_target(target);
 
        if (target->semihosting)
-               free(target->semihosting);
+               free(target->semihosting->basedir);
+       free(target->semihosting);
 
        jtag_unregister_event_callback(jtag_enable_callback, target);
 
@@ -2049,13 +2281,15 @@ static void target_destroy(struct target *target)
 
        /* release the targets SMP list */
        if (target->smp) {
-               struct target_list *head = target->head;
-               while (head != NULL) {
-                       struct target_list *pos = head->next;
+               struct target_list *head, *tmp;
+
+               list_for_each_entry_safe(head, tmp, target->smp_targets, lh) {
+                       list_del(&head->lh);
                        head->target->smp = 0;
                        free(head);
-                       head = pos;
                }
+               if (target->smp_targets != &empty_smp_targets)
+                       free(target->smp_targets);
                target->smp = 0;
        }
 
@@ -2101,7 +2335,7 @@ void target_quit(void)
 int target_arch_state(struct target *target)
 {
        int retval;
-       if (target == NULL) {
+       if (!target) {
                LOG_WARNING("No target has been configured");
                return ERROR_OK;
        }
@@ -2129,7 +2363,7 @@ static int target_gdb_fileio_end_default(struct target *target,
        return ERROR_OK;
 }
 
-static int target_profiling_default(struct target *target, uint32_t *samples,
+int target_profiling_default(struct target *target, uint32_t *samples,
                uint32_t max_num_samples, uint32_t *num_samples, uint32_t seconds)
 {
        struct timeval timeout, now;
@@ -2142,7 +2376,7 @@ static int target_profiling_default(struct target *target, uint32_t *samples,
 
        uint32_t sample_count = 0;
        /* hopefully it is safe to cache! We want to stop/restart as quickly as possible. */
-       struct reg *reg = register_get_by_name(target->reg_cache, "pc", 1);
+       struct reg *reg = register_get_by_name(target->reg_cache, "pc", true);
 
        int retval = ERROR_OK;
        for (;;) {
@@ -2183,7 +2417,7 @@ static int target_profiling_default(struct target *target, uint32_t *samples,
  */
 int target_write_buffer(struct target *target, target_addr_t address, uint32_t size, const uint8_t *buffer)
 {
-       LOG_DEBUG("writing buffer of %" PRIi32 " byte at " TARGET_ADDR_FMT,
+       LOG_DEBUG("writing buffer of %" PRIu32 " byte at " TARGET_ADDR_FMT,
                          size, address);
 
        if (!target_was_examined(target)) {
@@ -2209,10 +2443,13 @@ static int target_write_buffer_default(struct target *target,
        target_addr_t address, uint32_t count, const uint8_t *buffer)
 {
        uint32_t size;
+       unsigned int data_bytes = target_data_bits(target) / 8;
 
-       /* Align up to maximum bytes. The loop condition makes sure the next pass
+       /* Align up to maximum bytes. The loop condition makes sure the next pass
         * will have something to do with the size we leave to it. */
-       for (size = 1; size < 4 && count >= size * 2 + (address & size); size *= 2) {
+       for (size = 1;
+                       size < data_bytes && count >= size * 2 + (address & size);
+                       size *= 2) {
                if (address & size) {
                        int retval = target_write_memory(target, address, size, 1, buffer);
                        if (retval != ERROR_OK)
@@ -2245,7 +2482,7 @@ static int target_write_buffer_default(struct target *target,
  */
 int target_read_buffer(struct target *target, target_addr_t address, uint32_t size, uint8_t *buffer)
 {
-       LOG_DEBUG("reading buffer of %" PRIi32 " byte at " TARGET_ADDR_FMT,
+       LOG_DEBUG("reading buffer of %" PRIu32 " byte at " TARGET_ADDR_FMT,
                          size, address);
 
        if (!target_was_examined(target)) {
@@ -2270,10 +2507,13 @@ int target_read_buffer(struct target *target, target_addr_t address, uint32_t si
 static int target_read_buffer_default(struct target *target, target_addr_t address, uint32_t count, uint8_t *buffer)
 {
        uint32_t size;
+       unsigned int data_bytes = target_data_bits(target) / 8;
 
-       /* Align up to maximum bytes. The loop condition makes sure the next pass
+       /* Align up to maximum bytes. The loop condition makes sure the next pass
         * will have something to do with the size we leave to it. */
-       for (size = 1; size < 4 && count >= size * 2 + (address & size); size *= 2) {
+       for (size = 1;
+                       size < data_bytes && count >= size * 2 + (address & size);
+                       size *= 2) {
                if (address & size) {
                        int retval = target_read_memory(target, address, size, 1, buffer);
                        if (retval != ERROR_OK)
@@ -2310,12 +2550,16 @@ int target_checksum_memory(struct target *target, target_addr_t address, uint32_
                LOG_ERROR("Target not examined yet");
                return ERROR_FAIL;
        }
+       if (!target->type->checksum_memory) {
+               LOG_ERROR("Target %s doesn't support checksum_memory", target_name(target));
+               return ERROR_FAIL;
+       }
 
        retval = target->type->checksum_memory(target, address, size, &checksum);
        if (retval != ERROR_OK) {
                buffer = malloc(size);
-               if (buffer == NULL) {
-                       LOG_ERROR("error allocating buffer for section (%" PRId32 " bytes)", size);
+               if (!buffer) {
+                       LOG_ERROR("error allocating buffer for section (%" PRIu32 " bytes)", size);
                        return ERROR_COMMAND_SYNTAX_ERROR;
                }
                retval = target_read_buffer(target, address, size, buffer);
@@ -2349,8 +2593,8 @@ int target_blank_check_memory(struct target *target,
                return ERROR_FAIL;
        }
 
-       if (target->type->blank_check_memory == NULL)
-               return ERROR_TARGET_RESOURCE_NOT_AVAILABLE;
+       if (!target->type->blank_check_memory)
+               return ERROR_NOT_IMPLEMENTED;
 
        return target->type->blank_check_memory(target, blocks, num_blocks, erased_value);
 }
@@ -2614,7 +2858,7 @@ int target_write_phys_u8(struct target *target, target_addr_t address, uint8_t v
 static int find_target(struct command_invocation *cmd, const char *name)
 {
        struct target *target = get_target(name);
-       if (target == NULL) {
+       if (!target) {
                command_print(cmd, "Target: %s is unknown, try one of:\n", name);
                return ERROR_FAIL;
        }
@@ -2666,7 +2910,7 @@ COMMAND_HANDLER(handle_targets_command)
                                marker,
                                target_name(target),
                                target_type_name(target),
-                               Jim_Nvp_value2name_simple(nvp_target_endian,
+                               jim_nvp_value2name_simple(nvp_target_endian,
                                        target->endianness)->name,
                                target->tap->dotted_name,
                                state);
@@ -2678,57 +2922,57 @@ COMMAND_HANDLER(handle_targets_command)
 
 /* every 300ms we check for reset & powerdropout and issue a "reset halt" if so. */
 
-static int powerDropout;
-static int srstAsserted;
+static int power_dropout;
+static int srst_asserted;
 
-static int runPowerRestore;
-static int runPowerDropout;
-static int runSrstAsserted;
-static int runSrstDeasserted;
+static int run_power_restore;
+static int run_power_dropout;
+static int run_srst_asserted;
+static int run_srst_deasserted;
 
 static int sense_handler(void)
 {
-       static int prevSrstAsserted;
-       static int prevPowerdropout;
+       static int prev_srst_asserted;
+       static int prev_power_dropout;
 
-       int retval = jtag_power_dropout(&powerDropout);
+       int retval = jtag_power_dropout(&power_dropout);
        if (retval != ERROR_OK)
                return retval;
 
-       int powerRestored;
-       powerRestored = prevPowerdropout && !powerDropout;
-       if (powerRestored)
-               runPowerRestore = 1;
+       int power_restored;
+       power_restored = prev_power_dropout && !power_dropout;
+       if (power_restored)
+               run_power_restore = 1;
 
        int64_t current = timeval_ms();
-       static int64_t lastPower;
-       bool waitMore = lastPower + 2000 > current;
-       if (powerDropout && !waitMore) {
-               runPowerDropout = 1;
-               lastPower = current;
+       static int64_t last_power;
+       bool wait_more = last_power + 2000 > current;
+       if (power_dropout && !wait_more) {
+               run_power_dropout = 1;
+               last_power = current;
        }
 
-       retval = jtag_srst_asserted(&srstAsserted);
+       retval = jtag_srst_asserted(&srst_asserted);
        if (retval != ERROR_OK)
                return retval;
 
-       int srstDeasserted;
-       srstDeasserted = prevSrstAsserted && !srstAsserted;
+       int srst_deasserted;
+       srst_deasserted = prev_srst_asserted && !srst_asserted;
 
-       static int64_t lastSrst;
-       waitMore = lastSrst + 2000 > current;
-       if (srstDeasserted && !waitMore) {
-               runSrstDeasserted = 1;
-               lastSrst = current;
+       static int64_t last_srst;
+       wait_more = last_srst + 2000 > current;
+       if (srst_deasserted && !wait_more) {
+               run_srst_deasserted = 1;
+               last_srst = current;
        }
 
-       if (!prevSrstAsserted && srstAsserted)
-               runSrstAsserted = 1;
+       if (!prev_srst_asserted && srst_asserted)
+               run_srst_asserted = 1;
 
-       prevSrstAsserted = srstAsserted;
-       prevPowerdropout = powerDropout;
+       prev_srst_asserted = srst_asserted;
+       prev_power_dropout = power_dropout;
 
-       if (srstDeasserted || powerRestored) {
+       if (srst_deasserted || power_restored) {
                /* Other than logging the event we can't do anything here.
                 * Issuing a reset is a particularly bad idea as we might
                 * be inside a reset already.
@@ -2759,21 +3003,21 @@ static int handle_target(void *priv)
                 * clearing the flags after running these events.
                 */
                int did_something = 0;
-               if (runSrstAsserted) {
+               if (run_srst_asserted) {
                        LOG_INFO("srst asserted detected, running srst_asserted proc.");
                        Jim_Eval(interp, "srst_asserted");
                        did_something = 1;
                }
-               if (runSrstDeasserted) {
+               if (run_srst_deasserted) {
                        Jim_Eval(interp, "srst_deasserted");
                        did_something = 1;
                }
-               if (runPowerDropout) {
+               if (run_power_dropout) {
                        LOG_INFO("Power dropout detected, running power_dropout proc.");
                        Jim_Eval(interp, "power_dropout");
                        did_something = 1;
                }
-               if (runPowerRestore) {
+               if (run_power_restore) {
                        Jim_Eval(interp, "power_restore");
                        did_something = 1;
                }
@@ -2785,10 +3029,10 @@ static int handle_target(void *priv)
 
                /* clear action flags */
 
-               runSrstAsserted = 0;
-               runSrstDeasserted = 0;
-               runPowerRestore = 0;
-               runPowerDropout = 0;
+               run_srst_asserted = 0;
+               run_srst_deasserted = 0;
+               run_power_restore = 0;
+               run_power_dropout = 0;
 
                recursive = 0;
        }
@@ -2814,7 +3058,7 @@ static int handle_target(void *priv)
                target->backoff.count = 0;
 
                /* only poll target if we've got power and srst isn't asserted */
-               if (!powerDropout && !srstAsserted) {
+               if (!power_dropout && !srst_asserted) {
                        /* polling may fail silently until the target has been examined */
                        retval = target_poll(target);
                        if (retval != ERROR_OK) {
@@ -2836,7 +3080,7 @@ static int handle_target(void *priv)
                                /* Target examination could have failed due to unstable connection,
                                 * but we set the examined flag anyway to repoll it later */
                                if (retval != ERROR_OK) {
-                                       target->examined = true;
+                                       target_set_examined(target);
                                        LOG_USER("Examination failed, GDB will be halted. Polling again in %dms",
                                                 target->backoff.times * polling_interval);
                                        return retval;
@@ -2853,20 +3097,16 @@ static int handle_target(void *priv)
 
 COMMAND_HANDLER(handle_reg_command)
 {
-       struct target *target;
-       struct reg *reg = NULL;
-       unsigned count = 0;
-       char *value;
-
        LOG_DEBUG("-");
 
-       target = get_current_target(CMD_CTX);
+       struct target *target = get_current_target(CMD_CTX);
+       struct reg *reg = NULL;
 
        /* list all available registers for the current target */
        if (CMD_ARGC == 0) {
                struct reg_cache *cache = target->reg_cache;
 
-               count = 0;
+               unsigned int count = 0;
                while (cache) {
                        unsigned i;
 
@@ -2875,12 +3115,12 @@ COMMAND_HANDLER(handle_reg_command)
                        for (i = 0, reg = cache->reg_list;
                                        i < cache->num_regs;
                                        i++, reg++, count++) {
-                               if (reg->exist == false)
+                               if (reg->exist == false || reg->hidden)
                                        continue;
                                /* only print cached values if they are valid */
                                if (reg->valid) {
-                                       value = buf_to_str(reg->value,
-                                                       reg->size, 16);
+                                       char *value = buf_to_hex_str(reg->value,
+                                                       reg->size);
                                        command_print(CMD,
                                                        "(%i) %s (/%" PRIu32 "): 0x%s%s",
                                                        count, reg->name,
@@ -2892,7 +3132,7 @@ COMMAND_HANDLER(handle_reg_command)
                                } else {
                                        command_print(CMD, "(%i) %s (/%" PRIu32 ")",
                                                          count, reg->name,
-                                                         reg->size) ;
+                                                         reg->size);
                                }
                        }
                        cache = cache->next;
@@ -2907,7 +3147,7 @@ COMMAND_HANDLER(handle_reg_command)
                COMMAND_PARSE_NUMBER(uint, CMD_ARGV[0], num);
 
                struct reg_cache *cache = target->reg_cache;
-               count = 0;
+               unsigned int count = 0;
                while (cache) {
                        unsigned i;
                        for (i = 0; i < cache->num_regs; i++) {
@@ -2928,13 +3168,13 @@ COMMAND_HANDLER(handle_reg_command)
                }
        } else {
                /* access a single register by its name */
-               reg = register_get_by_name(target->reg_cache, CMD_ARGV[0], 1);
+               reg = register_get_by_name(target->reg_cache, CMD_ARGV[0], true);
 
                if (!reg)
                        goto not_found;
        }
 
-       assert(reg != NULL); /* give clang a hint that we *know* reg is != NULL here */
+       assert(reg); /* give clang a hint that we *know* reg is != NULL here */
 
        if (!reg->exist)
                goto not_found;
@@ -2945,9 +3185,14 @@ COMMAND_HANDLER(handle_reg_command)
                if ((CMD_ARGC == 2) && (strcmp(CMD_ARGV[1], "force") == 0))
                        reg->valid = 0;
 
-               if (reg->valid == 0)
-                       reg->type->get(reg);
-               value = buf_to_str(reg->value, reg->size, 16);
+               if (reg->valid == 0) {
+                       int retval = reg->type->get(reg);
+                       if (retval != ERROR_OK) {
+                               LOG_ERROR("Could not read register '%s'", reg->name);
+                               return retval;
+                       }
+               }
+               char *value = buf_to_hex_str(reg->value, reg->size);
                command_print(CMD, "%s (/%i): 0x%s", reg->name, (int)(reg->size), value);
                free(value);
                return ERROR_OK;
@@ -2956,19 +3201,22 @@ COMMAND_HANDLER(handle_reg_command)
        /* set register value */
        if (CMD_ARGC == 2) {
                uint8_t *buf = malloc(DIV_ROUND_UP(reg->size, 8));
-               if (buf == NULL)
+               if (!buf)
                        return ERROR_FAIL;
                str_to_buf(CMD_ARGV[1], strlen(CMD_ARGV[1]), buf, reg->size, 0);
 
-               reg->type->set(reg, buf);
-
-               value = buf_to_str(reg->value, reg->size, 16);
-               command_print(CMD, "%s (/%i): 0x%s", reg->name, (int)(reg->size), value);
-               free(value);
+               int retval = reg->type->set(reg, buf);
+               if (retval != ERROR_OK) {
+                       LOG_ERROR("Could not write to register '%s'", reg->name);
+               } else {
+                       char *value = buf_to_hex_str(reg->value, reg->size);
+                       command_print(CMD, "%s (/%i): 0x%s", reg->name, (int)(reg->size), value);
+                       free(value);
+               }
 
                free(buf);
 
-               return ERROR_OK;
+               return retval;
        }
 
        return ERROR_COMMAND_SYNTAX_ERROR;
@@ -3015,7 +3263,7 @@ COMMAND_HANDLER(handle_wait_halt_command)
        unsigned ms = DEFAULT_HALT_TIMEOUT;
        if (1 == CMD_ARGC) {
                int retval = parse_uint(CMD_ARGV[0], &ms);
-               if (ERROR_OK != retval)
+               if (retval != ERROR_OK)
                        return ERROR_COMMAND_SYNTAX_ERROR;
        }
 
@@ -3046,7 +3294,7 @@ int target_wait_state(struct target *target, enum target_state state, int ms)
                        once = false;
                        then = timeval_ms();
                        LOG_DEBUG("waiting for target %s...",
-                               Jim_Nvp_value2name_simple(nvp_target_state, state)->name);
+                               jim_nvp_value2name_simple(nvp_target_state, state)->name);
                }
 
                if (cur-then > 500)
@@ -3054,7 +3302,7 @@ int target_wait_state(struct target *target, enum target_state state, int ms)
 
                if ((cur-then) > ms) {
                        LOG_ERROR("timed out while waiting for target %s",
-                               Jim_Nvp_value2name_simple(nvp_target_state, state)->name);
+                               jim_nvp_value2name_simple(nvp_target_state, state)->name);
                        return ERROR_FAIL;
                }
        }
@@ -3071,13 +3319,13 @@ COMMAND_HANDLER(handle_halt_command)
        target->verbose_halt_msg = true;
 
        int retval = target_halt(target);
-       if (ERROR_OK != retval)
+       if (retval != ERROR_OK)
                return retval;
 
        if (CMD_ARGC == 1) {
                unsigned wait_local;
                retval = parse_uint(CMD_ARGV[0], &wait_local);
-               if (ERROR_OK != retval)
+               if (retval != ERROR_OK)
                        return ERROR_COMMAND_SYNTAX_ERROR;
                if (!wait_local)
                        return ERROR_OK;
@@ -3090,7 +3338,7 @@ COMMAND_HANDLER(handle_soft_reset_halt_command)
 {
        struct target *target = get_current_target(CMD_CTX);
 
-       LOG_USER("requesting target halt and executing a soft reset");
+       LOG_TARGET_INFO(target, "requesting target halt and executing a soft reset");
 
        target_soft_reset_halt(target);
 
@@ -3104,9 +3352,9 @@ COMMAND_HANDLER(handle_reset_command)
 
        enum target_reset_mode reset_mode = RESET_RUN;
        if (CMD_ARGC == 1) {
-               const Jim_Nvp *n;
-               n = Jim_Nvp_name2value_simple(nvp_reset_modes, CMD_ARGV[0]);
-               if ((n->name == NULL) || (n->value == RESET_UNKNOWN))
+               const struct jim_nvp *n;
+               n = jim_nvp_name2value_simple(nvp_reset_modes, CMD_ARGV[0]);
+               if ((!n->name) || (n->value == RESET_UNKNOWN))
                        return ERROR_COMMAND_SYNTAX_ERROR;
                reset_mode = n->value;
        }
@@ -3265,14 +3513,14 @@ COMMAND_HANDLER(handle_md_command)
                COMMAND_PARSE_NUMBER(uint, CMD_ARGV[1], count);
 
        uint8_t *buffer = calloc(count, size);
-       if (buffer == NULL) {
+       if (!buffer) {
                LOG_ERROR("Failed to allocate md read buffer");
                return ERROR_FAIL;
        }
 
        struct target *target = get_current_target(CMD_CTX);
        int retval = fn(target, address, size, count, buffer);
-       if (ERROR_OK == retval)
+       if (retval == ERROR_OK)
                target_handle_md_output(CMD, target, address, size, count, buffer);
 
        free(buffer);
@@ -3296,7 +3544,7 @@ static int target_fill_mem(struct target *target,
         * to fill large memory areas with any sane speed */
        const unsigned chunk_size = 16384;
        uint8_t *target_buf = malloc(chunk_size * data_size);
-       if (target_buf == NULL) {
+       if (!target_buf) {
                LOG_ERROR("Out of memory");
                return ERROR_FAIL;
        }
@@ -3386,7 +3634,7 @@ COMMAND_HANDLER(handle_mw_command)
        return target_fill_mem(target, address, fn, wordsize, value, count);
 }
 
-static COMMAND_HELPER(parse_load_image_command_CMD_ARGV, struct image *image,
+static COMMAND_HELPER(parse_load_image_command, struct image *image,
                target_addr_t *min_address, target_addr_t *max_address)
 {
        if (CMD_ARGC < 1 || CMD_ARGC > 5)
@@ -3398,11 +3646,11 @@ static COMMAND_HELPER(parse_load_image_command_CMD_ARGV, struct image *image,
                target_addr_t addr;
                COMMAND_PARSE_ADDRESS(CMD_ARGV[1], addr);
                image->base_address = addr;
-               image->base_address_set = 1;
+               image->base_address_set = true;
        } else
-               image->base_address_set = 0;
+               image->base_address_set = false;
 
-       image->start_address_set = 0;
+       image->start_address_set = false;
 
        if (CMD_ARGC >= 4)
                COMMAND_PARSE_ADDRESS(CMD_ARGV[3], *min_address);
@@ -3425,12 +3673,11 @@ COMMAND_HANDLER(handle_load_image_command)
        uint32_t image_size;
        target_addr_t min_address = 0;
        target_addr_t max_address = -1;
-       int i;
        struct image image;
 
-       int retval = CALL_COMMAND_HANDLER(parse_load_image_command_CMD_ARGV,
+       int retval = CALL_COMMAND_HANDLER(parse_load_image_command,
                        &image, &min_address, &max_address);
-       if (ERROR_OK != retval)
+       if (retval != ERROR_OK)
                return retval;
 
        struct target *target = get_current_target(CMD_CTX);
@@ -3443,9 +3690,9 @@ COMMAND_HANDLER(handle_load_image_command)
 
        image_size = 0x0;
        retval = ERROR_OK;
-       for (i = 0; i < image.num_sections; i++) {
+       for (unsigned int i = 0; i < image.num_sections; i++) {
                buffer = malloc(image.sections[i].size);
-               if (buffer == NULL) {
+               if (!buffer) {
                        command_print(CMD,
                                                  "error allocating buffer for section (%d bytes)",
                                                  (int)(image.sections[i].size));
@@ -3462,7 +3709,7 @@ COMMAND_HANDLER(handle_load_image_command)
                uint32_t offset = 0;
                uint32_t length = buf_cnt;
 
-               /* DANGER!!! beware of unsigned comparision here!!! */
+               /* DANGER!!! beware of unsigned comparison here!!! */
 
                if ((image.sections[i].base_address + buf_cnt >= min_address) &&
                                (image.sections[i].base_address < max_address)) {
@@ -3491,7 +3738,7 @@ COMMAND_HANDLER(handle_load_image_command)
                free(buffer);
        }
 
-       if ((ERROR_OK == retval) && (duration_measure(&bench) == ERROR_OK)) {
+       if ((retval == ERROR_OK) && (duration_measure(&bench) == ERROR_OK)) {
                command_print(CMD, "downloaded %" PRIu32 " bytes "
                                "in %fs (%0.3f KiB/s)", image_size,
                                duration_elapsed(&bench), duration_kbps(&bench, image_size));
@@ -3548,7 +3795,7 @@ COMMAND_HANDLER(handle_dump_image_command)
 
        free(buffer);
 
-       if ((ERROR_OK == retval) && (duration_measure(&bench) == ERROR_OK)) {
+       if ((retval == ERROR_OK) && (duration_measure(&bench) == ERROR_OK)) {
                size_t filesize;
                retval = fileio_size(fileio, &filesize);
                if (retval != ERROR_OK)
@@ -3576,7 +3823,6 @@ static COMMAND_HELPER(handle_verify_image_command_internal, enum verify_mode ver
        uint8_t *buffer;
        size_t buf_cnt;
        uint32_t image_size;
-       int i;
        int retval;
        uint32_t checksum = 0;
        uint32_t mem_checksum = 0;
@@ -3600,13 +3846,13 @@ static COMMAND_HELPER(handle_verify_image_command_internal, enum verify_mode ver
                target_addr_t addr;
                COMMAND_PARSE_ADDRESS(CMD_ARGV[1], addr);
                image.base_address = addr;
-               image.base_address_set = 1;
+               image.base_address_set = true;
        } else {
-               image.base_address_set = 0;
+               image.base_address_set = false;
                image.base_address = 0x0;
        }
 
-       image.start_address_set = 0;
+       image.start_address_set = false;
 
        retval = image_open(&image, CMD_ARGV[0], (CMD_ARGC == 3) ? CMD_ARGV[2] : NULL);
        if (retval != ERROR_OK)
@@ -3615,12 +3861,12 @@ static COMMAND_HELPER(handle_verify_image_command_internal, enum verify_mode ver
        image_size = 0x0;
        int diffs = 0;
        retval = ERROR_OK;
-       for (i = 0; i < image.num_sections; i++) {
+       for (unsigned int i = 0; i < image.num_sections; i++) {
                buffer = malloc(image.sections[i].size);
-               if (buffer == NULL) {
+               if (!buffer) {
                        command_print(CMD,
-                                       "error allocating buffer for section (%d bytes)",
-                                       (int)(image.sections[i].size));
+                                       "error allocating buffer for section (%" PRIu32 " bytes)",
+                                       image.sections[i].size);
                        break;
                }
                retval = image_read_section(&image, i, 0x0, image.sections[i].size, buffer, &buf_cnt);
@@ -3694,7 +3940,7 @@ static COMMAND_HELPER(handle_verify_image_command_internal, enum verify_mode ver
 done:
        if (diffs > 0)
                retval = ERROR_FAIL;
-       if ((ERROR_OK == retval) && (duration_measure(&bench) == ERROR_OK)) {
+       if ((retval == ERROR_OK) && (duration_measure(&bench) == ERROR_OK)) {
                command_print(CMD, "verified %" PRIu32 " bytes "
                                "in %fs (%0.3f KiB/s)", image_size,
                                duration_elapsed(&bench), duration_kbps(&bench, image_size));
@@ -3726,28 +3972,28 @@ static int handle_bp_command_list(struct command_invocation *cmd)
        struct breakpoint *breakpoint = target->breakpoints;
        while (breakpoint) {
                if (breakpoint->type == BKPT_SOFT) {
-                       char *buf = buf_to_str(breakpoint->orig_instr,
-                                       breakpoint->length, 16);
-                       command_print(cmd, "IVA breakpoint: " TARGET_ADDR_FMT ", 0x%x, %i, 0x%s",
+                       char *buf = buf_to_hex_str(breakpoint->orig_instr,
+                                       breakpoint->length);
+                       command_print(cmd, "IVA breakpoint: " TARGET_ADDR_FMT ", 0x%x, 0x%s",
                                        breakpoint->address,
                                        breakpoint->length,
-                                       breakpoint->set, buf);
+                                       buf);
                        free(buf);
                } else {
                        if ((breakpoint->address == 0) && (breakpoint->asid != 0))
-                               command_print(cmd, "Context breakpoint: 0x%8.8" PRIx32 ", 0x%x, %i",
+                               command_print(cmd, "Context breakpoint: 0x%8.8" PRIx32 ", 0x%x, %u",
                                                        breakpoint->asid,
-                                                       breakpoint->length, breakpoint->set);
+                                                       breakpoint->length, breakpoint->number);
                        else if ((breakpoint->address != 0) && (breakpoint->asid != 0)) {
-                               command_print(cmd, "Hybrid breakpoint(IVA): " TARGET_ADDR_FMT ", 0x%x, %i",
+                               command_print(cmd, "Hybrid breakpoint(IVA): " TARGET_ADDR_FMT ", 0x%x, %u",
                                                        breakpoint->address,
-                                                       breakpoint->length, breakpoint->set);
+                                                       breakpoint->length, breakpoint->number);
                                command_print(cmd, "\t|--->linked with ContextID: 0x%8.8" PRIx32,
                                                        breakpoint->asid);
                        } else
-                               command_print(cmd, "Breakpoint(IVA): " TARGET_ADDR_FMT ", 0x%x, %i",
+                               command_print(cmd, "Breakpoint(IVA): " TARGET_ADDR_FMT ", 0x%x, %u",
                                                        breakpoint->address,
-                                                       breakpoint->length, breakpoint->set);
+                                                       breakpoint->length, breakpoint->number);
                }
 
                breakpoint = breakpoint->next;
@@ -3764,27 +4010,27 @@ static int handle_bp_command_set(struct command_invocation *cmd,
        if (asid == 0) {
                retval = breakpoint_add(target, addr, length, hw);
                /* error is always logged in breakpoint_add(), do not print it again */
-               if (ERROR_OK == retval)
+               if (retval == ERROR_OK)
                        command_print(cmd, "breakpoint set at " TARGET_ADDR_FMT "", addr);
 
        } else if (addr == 0) {
-               if (target->type->add_context_breakpoint == NULL) {
+               if (!target->type->add_context_breakpoint) {
                        LOG_ERROR("Context breakpoint not available");
                        return ERROR_TARGET_RESOURCE_NOT_AVAILABLE;
                }
                retval = context_breakpoint_add(target, asid, length, hw);
                /* error is always logged in context_breakpoint_add(), do not print it again */
-               if (ERROR_OK == retval)
+               if (retval == ERROR_OK)
                        command_print(cmd, "Context breakpoint set at 0x%8.8" PRIx32 "", asid);
 
        } else {
-               if (target->type->add_hybrid_breakpoint == NULL) {
+               if (!target->type->add_hybrid_breakpoint) {
                        LOG_ERROR("Hybrid breakpoint not available");
                        return ERROR_TARGET_RESOURCE_NOT_AVAILABLE;
                }
                retval = hybrid_breakpoint_add(target, addr, asid, length, hw);
                /* error is always logged in hybrid_breakpoint_add(), do not print it again */
-               if (ERROR_OK == retval)
+               if (retval == ERROR_OK)
                        command_print(cmd, "Hybrid breakpoint set at 0x%8.8" PRIx32 "", asid);
        }
        return retval;
@@ -3876,7 +4122,7 @@ COMMAND_HANDLER(handle_wp_command)
        }
 
        enum watchpoint_rw type = WPT_ACCESS;
-       uint32_t addr = 0;
+       target_addr_t addr = 0;
        uint32_t length = 0;
        uint32_t data_value = 0x0;
        uint32_t data_mask = 0xffffffff;
@@ -3906,7 +4152,7 @@ COMMAND_HANDLER(handle_wp_command)
                /* fall through */
        case 2:
                COMMAND_PARSE_NUMBER(u32, CMD_ARGV[1], length);
-               COMMAND_PARSE_NUMBER(u32, CMD_ARGV[0], addr);
+               COMMAND_PARSE_ADDRESS(CMD_ARGV[0], addr);
                break;
 
        default:
@@ -3915,7 +4161,7 @@ COMMAND_HANDLER(handle_wp_command)
 
        int retval = watchpoint_add(target, addr, length, type,
                        data_value, data_mask);
-       if (ERROR_OK != retval)
+       if (retval != ERROR_OK)
                LOG_ERROR("Failure setting watchpoints");
 
        return retval;
@@ -3926,8 +4172,8 @@ COMMAND_HANDLER(handle_rwp_command)
        if (CMD_ARGC != 1)
                return ERROR_COMMAND_SYNTAX_ERROR;
 
-       uint32_t addr;
-       COMMAND_PARSE_NUMBER(u32, CMD_ARGV[0], addr);
+       target_addr_t addr;
+       COMMAND_PARSE_ADDRESS(CMD_ARGV[0], addr);
 
        struct target *target = get_current_target(CMD_CTX);
        watchpoint_remove(target, addr);
@@ -3958,44 +4204,44 @@ COMMAND_HANDLER(handle_virt2phys_command)
        return retval;
 }
 
-static void writeData(FILE *f, const void *data, size_t len)
+static void write_data(FILE *f, const void *data, size_t len)
 {
        size_t written = fwrite(data, 1, len, f);
        if (written != len)
                LOG_ERROR("failed to write %zu bytes: %s", len, strerror(errno));
 }
 
-static void writeLong(FILE *f, int l, struct target *target)
+static void write_long(FILE *f, int l, struct target *target)
 {
        uint8_t val[4];
 
        target_buffer_set_u32(target, val, l);
-       writeData(f, val, 4);
+       write_data(f, val, 4);
 }
 
-static void writeString(FILE *f, char *s)
+static void write_string(FILE *f, char *s)
 {
-       writeData(f, s, strlen(s));
+       write_data(f, s, strlen(s));
 }
 
 typedef unsigned char UNIT[2];  /* unit of profiling */
 
 /* Dump a gmon.out histogram file. */
-static void write_gmon(uint32_t *samples, uint32_t sampleNum, const char *filename, bool with_range,
+static void write_gmon(uint32_t *samples, uint32_t sample_num, const char *filename, bool with_range,
                        uint32_t start_address, uint32_t end_address, struct target *target, uint32_t duration_ms)
 {
        uint32_t i;
        FILE *f = fopen(filename, "w");
-       if (f == NULL)
+       if (!f)
                return;
-       writeString(f, "gmon");
-       writeLong(f, 0x00000001, target); /* Version */
-       writeLong(f, 0, target); /* padding */
-       writeLong(f, 0, target); /* padding */
-       writeLong(f, 0, target); /* padding */
+       write_string(f, "gmon");
+       write_long(f, 0x00000001, target); /* Version */
+       write_long(f, 0, target); /* padding */
+       write_long(f, 0, target); /* padding */
+       write_long(f, 0, target); /* padding */
 
        uint8_t zero = 0;  /* GMON_TAG_TIME_HIST */
-       writeData(f, &zero, 1);
+       write_data(f, &zero, 1);
 
        /* figure out bucket size */
        uint32_t min;
@@ -4006,7 +4252,7 @@ static void write_gmon(uint32_t *samples, uint32_t sampleNum, const char *filena
        } else {
                min = samples[0];
                max = samples[0];
-               for (i = 0; i < sampleNum; i++) {
+               for (i = 0; i < sample_num; i++) {
                        if (min > samples[i])
                                min = samples[i];
                        if (max < samples[i])
@@ -4018,50 +4264,50 @@ static void write_gmon(uint32_t *samples, uint32_t sampleNum, const char *filena
                max++;
        }
 
-       int addressSpace = max - min;
-       assert(addressSpace >= 2);
+       int address_space = max - min;
+       assert(address_space >= 2);
 
        /* FIXME: What is the reasonable number of buckets?
         * The profiling result will be more accurate if there are enough buckets. */
-       static const uint32_t maxBuckets = 128 * 1024; /* maximum buckets. */
-       uint32_t numBuckets = addressSpace / sizeof(UNIT);
-       if (numBuckets > maxBuckets)
-               numBuckets = maxBuckets;
-       int *buckets = malloc(sizeof(int) * numBuckets);
-       if (buckets == NULL) {
+       static const uint32_t max_buckets = 128 * 1024; /* maximum buckets. */
+       uint32_t num_buckets = address_space / sizeof(UNIT);
+       if (num_buckets > max_buckets)
+               num_buckets = max_buckets;
+       int *buckets = malloc(sizeof(int) * num_buckets);
+       if (!buckets) {
                fclose(f);
                return;
        }
-       memset(buckets, 0, sizeof(int) * numBuckets);
-       for (i = 0; i < sampleNum; i++) {
+       memset(buckets, 0, sizeof(int) * num_buckets);
+       for (i = 0; i < sample_num; i++) {
                uint32_t address = samples[i];
 
                if ((address < min) || (max <= address))
                        continue;
 
                long long a = address - min;
-               long long b = numBuckets;
-               long long c = addressSpace;
+               long long b = num_buckets;
+               long long c = address_space;
                int index_t = (a * b) / c; /* danger!!!! int32 overflows */
                buckets[index_t]++;
        }
 
        /* append binary memory gmon.out &profile_hist_hdr ((char*)&profile_hist_hdr + sizeof(struct gmon_hist_hdr)) */
-       writeLong(f, min, target);                      /* low_pc */
-       writeLong(f, max, target);                      /* high_pc */
-       writeLong(f, numBuckets, target);       /* # of buckets */
-       float sample_rate = sampleNum / (duration_ms / 1000.0);
-       writeLong(f, sample_rate, target);
-       writeString(f, "seconds");
+       write_long(f, min, target);                     /* low_pc */
+       write_long(f, max, target);                     /* high_pc */
+       write_long(f, num_buckets, target);     /* # of buckets */
+       float sample_rate = sample_num / (duration_ms / 1000.0);
+       write_long(f, sample_rate, target);
+       write_string(f, "seconds");
        for (i = 0; i < (15-strlen("seconds")); i++)
-               writeData(f, &zero, 1);
-       writeString(f, "s");
+               write_data(f, &zero, 1);
+       write_string(f, "s");
 
        /*append binary memory gmon.out profile_hist_data (profile_hist_data + profile_hist_hdr.hist_size) */
 
-       char *data = malloc(2 * numBuckets);
-       if (data != NULL) {
-               for (i = 0; i < numBuckets; i++) {
+       char *data = malloc(2 * num_buckets);
+       if (data) {
+               for (i = 0; i < num_buckets; i++) {
                        int val;
                        val = buckets[i];
                        if (val > 65535)
@@ -4070,7 +4316,7 @@ static void write_gmon(uint32_t *samples, uint32_t sampleNum, const char *filena
                        data[i * 2 + 1] = (val >> 8) & 0xff;
                }
                free(buckets);
-               writeData(f, data, numBuckets * 2);
+               write_data(f, data, num_buckets * 2);
                free(data);
        } else
                free(buckets);
@@ -4091,11 +4337,12 @@ COMMAND_HANDLER(handle_profile_command)
        uint32_t offset;
        uint32_t num_of_samples;
        int retval = ERROR_OK;
+       bool halted_before_profiling = target->state == TARGET_HALTED;
 
        COMMAND_PARSE_NUMBER(u32, CMD_ARGV[0], offset);
 
        uint32_t *samples = malloc(sizeof(uint32_t) * MAX_PROFILE_SAMPLE_NUM);
-       if (samples == NULL) {
+       if (!samples) {
                LOG_ERROR("No memory to store samples.");
                return ERROR_FAIL;
        }
@@ -4121,12 +4368,23 @@ COMMAND_HANDLER(handle_profile_command)
                free(samples);
                return retval;
        }
-       if (target->state == TARGET_RUNNING) {
+
+       if (target->state == TARGET_RUNNING && halted_before_profiling) {
+               /* The target was halted before we started and is running now. Halt it,
+                * for consistency. */
                retval = target_halt(target);
                if (retval != ERROR_OK) {
                        free(samples);
                        return retval;
                }
+       } else if (target->state == TARGET_HALTED && !halted_before_profiling) {
+               /* The target was running before we started and is halted now. Resume
+                * it, for consistency. */
+               retval = target_resume(target, 1, 0, 0, 0);
+               if (retval != ERROR_OK) {
+                       free(samples);
+                       return retval;
+               }
        }
 
        retval = target_poll(target);
@@ -4152,113 +4410,97 @@ COMMAND_HANDLER(handle_profile_command)
        return retval;
 }
 
-static int new_int_array_element(Jim_Interp *interp, const char *varname, int idx, uint32_t val)
+static int new_u64_array_element(Jim_Interp *interp, const char *varname, int idx, uint64_t val)
 {
        char *namebuf;
-       Jim_Obj *nameObjPtr, *valObjPtr;
+       Jim_Obj *obj_name, *obj_val;
        int result;
 
        namebuf = alloc_printf("%s(%d)", varname, idx);
        if (!namebuf)
                return JIM_ERR;
 
-       nameObjPtr = Jim_NewStringObj(interp, namebuf, -1);
-       valObjPtr = Jim_NewIntObj(interp, val);
-       if (!nameObjPtr || !valObjPtr) {
+       obj_name = Jim_NewStringObj(interp, namebuf, -1);
+       jim_wide wide_val = val;
+       obj_val = Jim_NewWideObj(interp, wide_val);
+       if (!obj_name || !obj_val) {
                free(namebuf);
                return JIM_ERR;
        }
 
-       Jim_IncrRefCount(nameObjPtr);
-       Jim_IncrRefCount(valObjPtr);
-       result = Jim_SetVariable(interp, nameObjPtr, valObjPtr);
-       Jim_DecrRefCount(interp, nameObjPtr);
-       Jim_DecrRefCount(interp, valObjPtr);
+       Jim_IncrRefCount(obj_name);
+       Jim_IncrRefCount(obj_val);
+       result = Jim_SetVariable(interp, obj_name, obj_val);
+       Jim_DecrRefCount(interp, obj_name);
+       Jim_DecrRefCount(interp, obj_val);
        free(namebuf);
        /* printf("%s(%d) <= 0%08x\n", varname, idx, val); */
        return result;
 }
 
-static int jim_mem2array(Jim_Interp *interp, int argc, Jim_Obj *const *argv)
-{
-       struct command_context *context;
-       struct target *target;
-
-       context = current_command_context(interp);
-       assert(context != NULL);
-
-       target = get_current_target(context);
-       if (target == NULL) {
-               LOG_ERROR("mem2array: no current target");
-               return JIM_ERR;
-       }
-
-       return target_mem2array(interp, target, argc - 1, argv + 1);
-}
-
 static int target_mem2array(Jim_Interp *interp, struct target *target, int argc, Jim_Obj *const *argv)
 {
-       long l;
-       uint32_t width;
-       int len;
-       uint32_t addr;
-       uint32_t count;
-       uint32_t v;
-       const char *varname;
-       const char *phys;
-       bool is_phys;
-       int  n, e, retval;
-       uint32_t i;
+       int e;
 
-       /* argv[1] = name of array to receive the data
-        * argv[2] = desired width
-        * argv[3] = memory address
-        * argv[4] = count of times to read
-        */
+       LOG_WARNING("DEPRECATED! use 'read_memory' not 'mem2array'");
 
+       /* argv[0] = name of array to receive the data
+        * argv[1] = desired element width in bits
+        * argv[2] = memory address
+        * argv[3] = count of times to read
+        * argv[4] = optional "phys"
+        */
        if (argc < 4 || argc > 5) {
                Jim_WrongNumArgs(interp, 0, argv, "varname width addr nelems [phys]");
                return JIM_ERR;
        }
-       varname = Jim_GetString(argv[0], &len);
-       /* given "foo" get space for worse case "foo(%d)" .. add 20 */
 
+       /* Arg 0: Name of the array variable */
+       const char *varname = Jim_GetString(argv[0], NULL);
+
+       /* Arg 1: Bit width of one element */
+       long l;
        e = Jim_GetLong(interp, argv[1], &l);
-       width = l;
        if (e != JIM_OK)
                return e;
+       const unsigned int width_bits = l;
 
-       e = Jim_GetLong(interp, argv[2], &l);
-       addr = l;
+       if (width_bits != 8 &&
+                       width_bits != 16 &&
+                       width_bits != 32 &&
+                       width_bits != 64) {
+               Jim_SetResult(interp, Jim_NewEmptyStringObj(interp));
+               Jim_AppendStrings(interp, Jim_GetResult(interp),
+                               "Invalid width param. Must be one of: 8, 16, 32 or 64.", NULL);
+               return JIM_ERR;
+       }
+       const unsigned int width = width_bits / 8;
+
+       /* Arg 2: Memory address */
+       jim_wide wide_addr;
+       e = Jim_GetWide(interp, argv[2], &wide_addr);
        if (e != JIM_OK)
                return e;
+       target_addr_t addr = (target_addr_t)wide_addr;
+
+       /* Arg 3: Number of elements to read */
        e = Jim_GetLong(interp, argv[3], &l);
-       len = l;
        if (e != JIM_OK)
                return e;
-       is_phys = false;
+       size_t len = l;
+
+       /* Arg 4: phys */
+       bool is_phys = false;
        if (argc > 4) {
-               phys = Jim_GetString(argv[4], &n);
-               if (!strncmp(phys, "phys", n))
+               int str_len = 0;
+               const char *phys = Jim_GetString(argv[4], &str_len);
+               if (!strncmp(phys, "phys", str_len))
                        is_phys = true;
                else
                        return JIM_ERR;
        }
-       switch (width) {
-               case 8:
-                       width = 1;
-                       break;
-               case 16:
-                       width = 2;
-                       break;
-               case 32:
-                       width = 4;
-                       break;
-               default:
-                       Jim_SetResult(interp, Jim_NewEmptyStringObj(interp));
-                       Jim_AppendStrings(interp, Jim_GetResult(interp), "Invalid width param, must be 8/16/32", NULL);
-                       return JIM_ERR;
-       }
+
+       /* Argument checks */
        if (len == 0) {
                Jim_SetResult(interp, Jim_NewEmptyStringObj(interp));
                Jim_AppendStrings(interp, Jim_GetResult(interp), "mem2array: zero width read?", NULL);
@@ -4269,21 +4511,22 @@ static int target_mem2array(Jim_Interp *interp, struct target *target, int argc,
                Jim_AppendStrings(interp, Jim_GetResult(interp), "mem2array: addr + len - wraps to zero?", NULL);
                return JIM_ERR;
        }
-       /* absurd transfer size? */
        if (len > 65536) {
                Jim_SetResult(interp, Jim_NewEmptyStringObj(interp));
-               Jim_AppendStrings(interp, Jim_GetResult(interp), "mem2array: absurd > 64K item request", NULL);
+               Jim_AppendStrings(interp, Jim_GetResult(interp),
+                               "mem2array: too large read request, exceeds 64K items", NULL);
                return JIM_ERR;
        }
 
        if ((width == 1) ||
                ((width == 2) && ((addr & 1) == 0)) ||
-               ((width == 4) && ((addr & 3) == 0))) {
-               /* all is well */
+               ((width == 4) && ((addr & 3) == 0)) ||
+               ((width == 8) && ((addr & 7) == 0))) {
+               /* alignment correct */
        } else {
                char buf[100];
                Jim_SetResult(interp, Jim_NewEmptyStringObj(interp));
-               sprintf(buf, "mem2array address: 0x%08" PRIx32 " is not aligned for %" PRId32 " byte reads",
+               sprintf(buf, "mem2array address: " TARGET_ADDR_FMT " is not aligned for %" PRIu32 " byte reads",
                                addr,
                                width);
                Jim_AppendStrings(interp, Jim_GetResult(interp), buf, NULL);
@@ -4293,40 +4536,42 @@ static int target_mem2array(Jim_Interp *interp, struct target *target, int argc,
        /* Transfer loop */
 
        /* index counter */
-       n = 0;
+       size_t idx = 0;
 
-       size_t buffersize = 4096;
+       const size_t buffersize = 4096;
        uint8_t *buffer = malloc(buffersize);
-       if (buffer == NULL)
+       if (!buffer)
                return JIM_ERR;
 
        /* assume ok */
        e = JIM_OK;
        while (len) {
                /* Slurp... in buffer size chunks */
+               const unsigned int max_chunk_len = buffersize / width;
+               const size_t chunk_len = MIN(len, max_chunk_len); /* in elements.. */
 
-               count = len; /* in objects.. */
-               if (count > (buffersize / width))
-                       count = (buffersize / width);
-
+               int retval;
                if (is_phys)
-                       retval = target_read_phys_memory(target, addr, width, count, buffer);
+                       retval = target_read_phys_memory(target, addr, width, chunk_len, buffer);
                else
-                       retval = target_read_memory(target, addr, width, count, buffer);
+                       retval = target_read_memory(target, addr, width, chunk_len, buffer);
                if (retval != ERROR_OK) {
                        /* BOO !*/
-                       LOG_ERROR("mem2array: Read @ 0x%08" PRIx32 ", w=%" PRId32 ", cnt=%" PRId32 ", failed",
+                       LOG_ERROR("mem2array: Read @ " TARGET_ADDR_FMT ", w=%u, cnt=%zu, failed",
                                          addr,
                                          width,
-                                         count);
+                                         chunk_len);
                        Jim_SetResult(interp, Jim_NewEmptyStringObj(interp));
                        Jim_AppendStrings(interp, Jim_GetResult(interp), "mem2array: cannot read memory", NULL);
                        e = JIM_ERR;
                        break;
                } else {
-                       v = 0; /* shut up gcc */
-                       for (i = 0; i < count ; i++, n++) {
+                       for (size_t i = 0; i < chunk_len ; i++, idx++) {
+                               uint64_t v = 0;
                                switch (width) {
+                                       case 8:
+                                               v = target_buffer_get_u64(target, &buffer[i*width]);
+                                               break;
                                        case 4:
                                                v = target_buffer_get_u32(target, &buffer[i*width]);
                                                break;
@@ -4337,10 +4582,10 @@ static int target_mem2array(Jim_Interp *interp, struct target *target, int argc,
                                                v = buffer[i] & 0x0ff;
                                                break;
                                }
-                               new_int_array_element(interp, varname, n, v);
+                               new_u64_array_element(interp, varname, idx, v);
                        }
-                       len -= count;
-                       addr += count * width;
+                       len -= chunk_len;
+                       addr += chunk_len * width;
                }
        }
 
@@ -4351,145 +4596,280 @@ static int target_mem2array(Jim_Interp *interp, struct target *target, int argc,
        return e;
 }
 
-static int get_int_array_element(Jim_Interp *interp, const char *varname, int idx, uint32_t *val)
+static int target_jim_read_memory(Jim_Interp *interp, int argc,
+               Jim_Obj * const *argv)
 {
-       char *namebuf;
-       Jim_Obj *nameObjPtr, *valObjPtr;
-       int result;
+       /*
+        * argv[1] = memory address
+        * argv[2] = desired element width in bits
+        * argv[3] = number of elements to read
+        * argv[4] = optional "phys"
+        */
+
+       if (argc < 4 || argc > 5) {
+               Jim_WrongNumArgs(interp, 1, argv, "address width count ['phys']");
+               return JIM_ERR;
+       }
+
+       /* Arg 1: Memory address. */
+       jim_wide wide_addr;
+       int e;
+       e = Jim_GetWide(interp, argv[1], &wide_addr);
+
+       if (e != JIM_OK)
+               return e;
+
+       target_addr_t addr = (target_addr_t)wide_addr;
+
+       /* Arg 2: Bit width of one element. */
        long l;
+       e = Jim_GetLong(interp, argv[2], &l);
 
-       namebuf = alloc_printf("%s(%d)", varname, idx);
-       if (!namebuf)
+       if (e != JIM_OK)
+               return e;
+
+       const unsigned int width_bits = l;
+
+       /* Arg 3: Number of elements to read. */
+       e = Jim_GetLong(interp, argv[3], &l);
+
+       if (e != JIM_OK)
+               return e;
+
+       size_t count = l;
+
+       /* Arg 4: Optional 'phys'. */
+       bool is_phys = false;
+
+       if (argc > 4) {
+               const char *phys = Jim_GetString(argv[4], NULL);
+
+               if (strcmp(phys, "phys")) {
+                       Jim_SetResultFormatted(interp, "invalid argument '%s', must be 'phys'", phys);
+                       return JIM_ERR;
+               }
+
+               is_phys = true;
+       }
+
+       switch (width_bits) {
+       case 8:
+       case 16:
+       case 32:
+       case 64:
+               break;
+       default:
+               Jim_SetResultString(interp, "invalid width, must be 8, 16, 32 or 64", -1);
                return JIM_ERR;
+       }
 
-       nameObjPtr = Jim_NewStringObj(interp, namebuf, -1);
-       if (!nameObjPtr) {
-               free(namebuf);
+       const unsigned int width = width_bits / 8;
+
+       if ((addr + (count * width)) < addr) {
+               Jim_SetResultString(interp, "read_memory: addr + count wraps to zero", -1);
                return JIM_ERR;
        }
 
-       Jim_IncrRefCount(nameObjPtr);
-       valObjPtr = Jim_GetVariable(interp, nameObjPtr, JIM_ERRMSG);
-       Jim_DecrRefCount(interp, nameObjPtr);
-       free(namebuf);
-       if (valObjPtr == NULL)
+       if (count > 65536) {
+               Jim_SetResultString(interp, "read_memory: too large read request, exeeds 64K elements", -1);
                return JIM_ERR;
+       }
 
-       result = Jim_GetLong(interp, valObjPtr, &l);
-       /* printf("%s(%d) => 0%08x\n", varname, idx, val); */
-       *val = l;
-       return result;
+       struct command_context *cmd_ctx = current_command_context(interp);
+       assert(cmd_ctx != NULL);
+       struct target *target = get_current_target(cmd_ctx);
+
+       const size_t buffersize = 4096;
+       uint8_t *buffer = malloc(buffersize);
+
+       if (!buffer) {
+               LOG_ERROR("Failed to allocate memory");
+               return JIM_ERR;
+       }
+
+       Jim_Obj *result_list = Jim_NewListObj(interp, NULL, 0);
+       Jim_IncrRefCount(result_list);
+
+       while (count > 0) {
+               const unsigned int max_chunk_len = buffersize / width;
+               const size_t chunk_len = MIN(count, max_chunk_len);
+
+               int retval;
+
+               if (is_phys)
+                       retval = target_read_phys_memory(target, addr, width, chunk_len, buffer);
+               else
+                       retval = target_read_memory(target, addr, width, chunk_len, buffer);
+
+               if (retval != ERROR_OK) {
+                       LOG_ERROR("read_memory: read at " TARGET_ADDR_FMT " with width=%u and count=%zu failed",
+                               addr, width_bits, chunk_len);
+                       Jim_SetResultString(interp, "read_memory: failed to read memory", -1);
+                       e = JIM_ERR;
+                       break;
+               }
+
+               for (size_t i = 0; i < chunk_len ; i++) {
+                       uint64_t v = 0;
+
+                       switch (width) {
+                       case 8:
+                               v = target_buffer_get_u64(target, &buffer[i * width]);
+                               break;
+                       case 4:
+                               v = target_buffer_get_u32(target, &buffer[i * width]);
+                               break;
+                       case 2:
+                               v = target_buffer_get_u16(target, &buffer[i * width]);
+                               break;
+                       case 1:
+                               v = buffer[i];
+                               break;
+                       }
+
+                       char value_buf[11];
+                       snprintf(value_buf, sizeof(value_buf), "0x%" PRIx64, v);
+
+                       Jim_ListAppendElement(interp, result_list,
+                               Jim_NewStringObj(interp, value_buf, -1));
+               }
+
+               count -= chunk_len;
+               addr += chunk_len * width;
+       }
+
+       free(buffer);
+
+       if (e != JIM_OK) {
+               Jim_DecrRefCount(interp, result_list);
+               return e;
+       }
+
+       Jim_SetResult(interp, result_list);
+       Jim_DecrRefCount(interp, result_list);
+
+       return JIM_OK;
 }
 
-static int jim_array2mem(Jim_Interp *interp, int argc, Jim_Obj *const *argv)
+static int get_u64_array_element(Jim_Interp *interp, const char *varname, size_t idx, uint64_t *val)
 {
-       struct command_context *context;
-       struct target *target;
-
-       context = current_command_context(interp);
-       assert(context != NULL);
+       char *namebuf = alloc_printf("%s(%zu)", varname, idx);
+       if (!namebuf)
+               return JIM_ERR;
 
-       target = get_current_target(context);
-       if (target == NULL) {
-               LOG_ERROR("array2mem: no current target");
+       Jim_Obj *obj_name = Jim_NewStringObj(interp, namebuf, -1);
+       if (!obj_name) {
+               free(namebuf);
                return JIM_ERR;
        }
 
-       return target_array2mem(interp, target, argc-1, argv + 1);
+       Jim_IncrRefCount(obj_name);
+       Jim_Obj *obj_val = Jim_GetVariable(interp, obj_name, JIM_ERRMSG);
+       Jim_DecrRefCount(interp, obj_name);
+       free(namebuf);
+       if (!obj_val)
+               return JIM_ERR;
+
+       jim_wide wide_val;
+       int result = Jim_GetWide(interp, obj_val, &wide_val);
+       *val = wide_val;
+       return result;
 }
 
 static int target_array2mem(Jim_Interp *interp, struct target *target,
                int argc, Jim_Obj *const *argv)
 {
-       long l;
-       uint32_t width;
-       int len;
-       uint32_t addr;
-       uint32_t count;
-       uint32_t v;
-       const char *varname;
-       const char *phys;
-       bool is_phys;
-       int  n, e, retval;
-       uint32_t i;
+       int e;
+
+       LOG_WARNING("DEPRECATED! use 'write_memory' not 'array2mem'");
 
-       /* argv[1] = name of array to get the data
-        * argv[2] = desired width
-        * argv[3] = memory address
-        * argv[4] = count to write
+       /* argv[0] = name of array from which to read the data
+        * argv[1] = desired element width in bits
+        * argv[2] = memory address
+        * argv[3] = number of elements to write
+        * argv[4] = optional "phys"
         */
        if (argc < 4 || argc > 5) {
                Jim_WrongNumArgs(interp, 0, argv, "varname width addr nelems [phys]");
                return JIM_ERR;
        }
-       varname = Jim_GetString(argv[0], &len);
-       /* given "foo" get space for worse case "foo(%d)" .. add 20 */
 
+       /* Arg 0: Name of the array variable */
+       const char *varname = Jim_GetString(argv[0], NULL);
+
+       /* Arg 1: Bit width of one element */
+       long l;
        e = Jim_GetLong(interp, argv[1], &l);
-       width = l;
        if (e != JIM_OK)
                return e;
+       const unsigned int width_bits = l;
 
-       e = Jim_GetLong(interp, argv[2], &l);
-       addr = l;
+       if (width_bits != 8 &&
+                       width_bits != 16 &&
+                       width_bits != 32 &&
+                       width_bits != 64) {
+               Jim_SetResult(interp, Jim_NewEmptyStringObj(interp));
+               Jim_AppendStrings(interp, Jim_GetResult(interp),
+                               "Invalid width param. Must be one of: 8, 16, 32 or 64.", NULL);
+               return JIM_ERR;
+       }
+       const unsigned int width = width_bits / 8;
+
+       /* Arg 2: Memory address */
+       jim_wide wide_addr;
+       e = Jim_GetWide(interp, argv[2], &wide_addr);
        if (e != JIM_OK)
                return e;
+       target_addr_t addr = (target_addr_t)wide_addr;
+
+       /* Arg 3: Number of elements to write */
        e = Jim_GetLong(interp, argv[3], &l);
-       len = l;
        if (e != JIM_OK)
                return e;
-       is_phys = false;
+       size_t len = l;
+
+       /* Arg 4: Phys */
+       bool is_phys = false;
        if (argc > 4) {
-               phys = Jim_GetString(argv[4], &n);
-               if (!strncmp(phys, "phys", n))
+               int str_len = 0;
+               const char *phys = Jim_GetString(argv[4], &str_len);
+               if (!strncmp(phys, "phys", str_len))
                        is_phys = true;
                else
                        return JIM_ERR;
        }
-       switch (width) {
-               case 8:
-                       width = 1;
-                       break;
-               case 16:
-                       width = 2;
-                       break;
-               case 32:
-                       width = 4;
-                       break;
-               default:
-                       Jim_SetResult(interp, Jim_NewEmptyStringObj(interp));
-                       Jim_AppendStrings(interp, Jim_GetResult(interp),
-                                       "Invalid width param, must be 8/16/32", NULL);
-                       return JIM_ERR;
-       }
+
+       /* Argument checks */
        if (len == 0) {
                Jim_SetResult(interp, Jim_NewEmptyStringObj(interp));
                Jim_AppendStrings(interp, Jim_GetResult(interp),
                                "array2mem: zero width read?", NULL);
                return JIM_ERR;
        }
+
        if ((addr + (len * width)) < addr) {
                Jim_SetResult(interp, Jim_NewEmptyStringObj(interp));
                Jim_AppendStrings(interp, Jim_GetResult(interp),
                                "array2mem: addr + len - wraps to zero?", NULL);
                return JIM_ERR;
        }
-       /* absurd transfer size? */
+
        if (len > 65536) {
                Jim_SetResult(interp, Jim_NewEmptyStringObj(interp));
                Jim_AppendStrings(interp, Jim_GetResult(interp),
-                               "array2mem: absurd > 64K item request", NULL);
+                               "array2mem: too large memory write request, exceeds 64K items", NULL);
                return JIM_ERR;
        }
 
        if ((width == 1) ||
                ((width == 2) && ((addr & 1) == 0)) ||
-               ((width == 4) && ((addr & 3) == 0))) {
-               /* all is well */
+               ((width == 4) && ((addr & 3) == 0)) ||
+               ((width == 8) && ((addr & 7) == 0))) {
+               /* alignment correct */
        } else {
                char buf[100];
                Jim_SetResult(interp, Jim_NewEmptyStringObj(interp));
-               sprintf(buf, "array2mem address: 0x%08" PRIx32 " is not aligned for %" PRId32 " byte reads",
+               sprintf(buf, "array2mem address: " TARGET_ADDR_FMT " is not aligned for %" PRIu32 " byte reads",
                                addr,
                                width);
                Jim_AppendStrings(interp, Jim_GetResult(interp), buf, NULL);
@@ -4498,27 +4878,34 @@ static int target_array2mem(Jim_Interp *interp, struct target *target,
 
        /* Transfer loop */
 
-       /* index counter */
-       n = 0;
        /* assume ok */
        e = JIM_OK;
 
-       size_t buffersize = 4096;
+       const size_t buffersize = 4096;
        uint8_t *buffer = malloc(buffersize);
-       if (buffer == NULL)
+       if (!buffer)
                return JIM_ERR;
 
+       /* index counter */
+       size_t idx = 0;
+
        while (len) {
                /* Slurp... in buffer size chunks */
+               const unsigned int max_chunk_len = buffersize / width;
 
-               count = len; /* in objects.. */
-               if (count > (buffersize / width))
-                       count = (buffersize / width);
+               const size_t chunk_len = MIN(len, max_chunk_len); /* in elements.. */
 
-               v = 0; /* shut up gcc */
-               for (i = 0; i < count; i++, n++) {
-                       get_int_array_element(interp, varname, n, &v);
+               /* Fill the buffer */
+               for (size_t i = 0; i < chunk_len; i++, idx++) {
+                       uint64_t v = 0;
+                       if (get_u64_array_element(interp, varname, idx, &v) != JIM_OK) {
+                               free(buffer);
+                               return JIM_ERR;
+                       }
                        switch (width) {
+                       case 8:
+                               target_buffer_set_u64(target, &buffer[i * width], v);
+                               break;
                        case 4:
                                target_buffer_set_u32(target, &buffer[i * width], v);
                                break;
@@ -4530,24 +4917,26 @@ static int target_array2mem(Jim_Interp *interp, struct target *target,
                                break;
                        }
                }
-               len -= count;
+               len -= chunk_len;
 
+               /* Write the buffer to memory */
+               int retval;
                if (is_phys)
-                       retval = target_write_phys_memory(target, addr, width, count, buffer);
+                       retval = target_write_phys_memory(target, addr, width, chunk_len, buffer);
                else
-                       retval = target_write_memory(target, addr, width, count, buffer);
+                       retval = target_write_memory(target, addr, width, chunk_len, buffer);
                if (retval != ERROR_OK) {
                        /* BOO !*/
-                       LOG_ERROR("array2mem: Write @ 0x%08" PRIx32 ", w=%" PRId32 ", cnt=%" PRId32 ", failed",
+                       LOG_ERROR("array2mem: Write @ " TARGET_ADDR_FMT ", w=%u, cnt=%zu, failed",
                                          addr,
                                          width,
-                                         count);
+                                         chunk_len);
                        Jim_SetResult(interp, Jim_NewEmptyStringObj(interp));
                        Jim_AppendStrings(interp, Jim_GetResult(interp), "array2mem: cannot read memory", NULL);
                        e = JIM_ERR;
                        break;
                }
-               addr += count * width;
+               addr += chunk_len * width;
        }
 
        free(buffer);
@@ -4557,6 +4946,144 @@ static int target_array2mem(Jim_Interp *interp, struct target *target,
        return e;
 }
 
+static int target_jim_write_memory(Jim_Interp *interp, int argc,
+               Jim_Obj * const *argv)
+{
+       /*
+        * argv[1] = memory address
+        * argv[2] = desired element width in bits
+        * argv[3] = list of data to write
+        * argv[4] = optional "phys"
+        */
+
+       if (argc < 4 || argc > 5) {
+               Jim_WrongNumArgs(interp, 1, argv, "address width data ['phys']");
+               return JIM_ERR;
+       }
+
+       /* Arg 1: Memory address. */
+       int e;
+       jim_wide wide_addr;
+       e = Jim_GetWide(interp, argv[1], &wide_addr);
+
+       if (e != JIM_OK)
+               return e;
+
+       target_addr_t addr = (target_addr_t)wide_addr;
+
+       /* Arg 2: Bit width of one element. */
+       long l;
+       e = Jim_GetLong(interp, argv[2], &l);
+
+       if (e != JIM_OK)
+               return e;
+
+       const unsigned int width_bits = l;
+       size_t count = Jim_ListLength(interp, argv[3]);
+
+       /* Arg 4: Optional 'phys'. */
+       bool is_phys = false;
+
+       if (argc > 4) {
+               const char *phys = Jim_GetString(argv[4], NULL);
+
+               if (strcmp(phys, "phys")) {
+                       Jim_SetResultFormatted(interp, "invalid argument '%s', must be 'phys'", phys);
+                       return JIM_ERR;
+               }
+
+               is_phys = true;
+       }
+
+       switch (width_bits) {
+       case 8:
+       case 16:
+       case 32:
+       case 64:
+               break;
+       default:
+               Jim_SetResultString(interp, "invalid width, must be 8, 16, 32 or 64", -1);
+               return JIM_ERR;
+       }
+
+       const unsigned int width = width_bits / 8;
+
+       if ((addr + (count * width)) < addr) {
+               Jim_SetResultString(interp, "write_memory: addr + len wraps to zero", -1);
+               return JIM_ERR;
+       }
+
+       if (count > 65536) {
+               Jim_SetResultString(interp, "write_memory: too large memory write request, exceeds 64K elements", -1);
+               return JIM_ERR;
+       }
+
+       struct command_context *cmd_ctx = current_command_context(interp);
+       assert(cmd_ctx != NULL);
+       struct target *target = get_current_target(cmd_ctx);
+
+       const size_t buffersize = 4096;
+       uint8_t *buffer = malloc(buffersize);
+
+       if (!buffer) {
+               LOG_ERROR("Failed to allocate memory");
+               return JIM_ERR;
+       }
+
+       size_t j = 0;
+
+       while (count > 0) {
+               const unsigned int max_chunk_len = buffersize / width;
+               const size_t chunk_len = MIN(count, max_chunk_len);
+
+               for (size_t i = 0; i < chunk_len; i++, j++) {
+                       Jim_Obj *tmp = Jim_ListGetIndex(interp, argv[3], j);
+                       jim_wide element_wide;
+                       Jim_GetWide(interp, tmp, &element_wide);
+
+                       const uint64_t v = element_wide;
+
+                       switch (width) {
+                       case 8:
+                               target_buffer_set_u64(target, &buffer[i * width], v);
+                               break;
+                       case 4:
+                               target_buffer_set_u32(target, &buffer[i * width], v);
+                               break;
+                       case 2:
+                               target_buffer_set_u16(target, &buffer[i * width], v);
+                               break;
+                       case 1:
+                               buffer[i] = v & 0x0ff;
+                               break;
+                       }
+               }
+
+               count -= chunk_len;
+
+               int retval;
+
+               if (is_phys)
+                       retval = target_write_phys_memory(target, addr, width, chunk_len, buffer);
+               else
+                       retval = target_write_memory(target, addr, width, chunk_len, buffer);
+
+               if (retval != ERROR_OK) {
+                       LOG_ERROR("write_memory: write at " TARGET_ADDR_FMT " with width=%u and count=%zu failed",
+                               addr,  width_bits, chunk_len);
+                       Jim_SetResultString(interp, "write_memory: failed to write memory", -1);
+                       e = JIM_ERR;
+                       break;
+               }
+
+               addr += chunk_len * width;
+       }
+
+       free(buffer);
+
+       return e;
+}
+
 /* FIX? should we propagate errors here rather than printing them
  * and continuing?
  */
@@ -4565,14 +5092,14 @@ void target_handle_event(struct target *target, enum target_event e)
        struct target_event_action *teap;
        int retval;
 
-       for (teap = target->event_action; teap != NULL; teap = teap->next) {
+       for (teap = target->event_action; teap; teap = teap->next) {
                if (teap->event == e) {
                        LOG_DEBUG("target(%d): %s (%s) event: %d (%s) action: %s",
                                           target->target_number,
                                           target_name(target),
                                           target_type_name(target),
                                           e,
-                                          Jim_Nvp_value2name_simple(nvp_target_event, e)->name,
+                                          target_event_name(e),
                                           Jim_GetString(teap->body, NULL));
 
                        /* Override current target by the target an event
@@ -4582,24 +5109,174 @@ void target_handle_event(struct target *target, enum target_event e)
                        struct command_context *cmd_ctx = current_command_context(teap->interp);
                        struct target *saved_target_override = cmd_ctx->current_target_override;
                        cmd_ctx->current_target_override = target;
+
                        retval = Jim_EvalObj(teap->interp, teap->body);
 
+                       cmd_ctx->current_target_override = saved_target_override;
+
+                       if (retval == ERROR_COMMAND_CLOSE_CONNECTION)
+                               return;
+
                        if (retval == JIM_RETURN)
                                retval = teap->interp->returnCode;
 
                        if (retval != JIM_OK) {
                                Jim_MakeErrorMessage(teap->interp);
                                LOG_USER("Error executing event %s on target %s:\n%s",
-                                                 Jim_Nvp_value2name_simple(nvp_target_event, e)->name,
+                                                 target_event_name(e),
                                                  target_name(target),
                                                  Jim_GetString(Jim_GetResult(teap->interp), NULL));
                                /* clean both error code and stacktrace before return */
                                Jim_Eval(teap->interp, "error \"\" \"\"");
                        }
+               }
+       }
+}
 
-                       cmd_ctx->current_target_override = saved_target_override;
+static int target_jim_get_reg(Jim_Interp *interp, int argc,
+               Jim_Obj * const *argv)
+{
+       bool force = false;
+
+       if (argc == 3) {
+               const char *option = Jim_GetString(argv[1], NULL);
+
+               if (!strcmp(option, "-force")) {
+                       argc--;
+                       argv++;
+                       force = true;
+               } else {
+                       Jim_SetResultFormatted(interp, "invalid option '%s'", option);
+                       return JIM_ERR;
                }
        }
+
+       if (argc != 2) {
+               Jim_WrongNumArgs(interp, 1, argv, "[-force] list");
+               return JIM_ERR;
+       }
+
+       const int length = Jim_ListLength(interp, argv[1]);
+
+       Jim_Obj *result_dict = Jim_NewDictObj(interp, NULL, 0);
+
+       if (!result_dict)
+               return JIM_ERR;
+
+       struct command_context *cmd_ctx = current_command_context(interp);
+       assert(cmd_ctx != NULL);
+       const struct target *target = get_current_target(cmd_ctx);
+
+       for (int i = 0; i < length; i++) {
+               Jim_Obj *elem = Jim_ListGetIndex(interp, argv[1], i);
+
+               if (!elem)
+                       return JIM_ERR;
+
+               const char *reg_name = Jim_String(elem);
+
+               struct reg *reg = register_get_by_name(target->reg_cache, reg_name,
+                       false);
+
+               if (!reg || !reg->exist) {
+                       Jim_SetResultFormatted(interp, "unknown register '%s'", reg_name);
+                       return JIM_ERR;
+               }
+
+               if (force) {
+                       int retval = reg->type->get(reg);
+
+                       if (retval != ERROR_OK) {
+                               Jim_SetResultFormatted(interp, "failed to read register '%s'",
+                                       reg_name);
+                               return JIM_ERR;
+                       }
+               }
+
+               char *reg_value = buf_to_hex_str(reg->value, reg->size);
+
+               if (!reg_value) {
+                       LOG_ERROR("Failed to allocate memory");
+                       return JIM_ERR;
+               }
+
+               char *tmp = alloc_printf("0x%s", reg_value);
+
+               free(reg_value);
+
+               if (!tmp) {
+                       LOG_ERROR("Failed to allocate memory");
+                       return JIM_ERR;
+               }
+
+               Jim_DictAddElement(interp, result_dict, elem,
+                       Jim_NewStringObj(interp, tmp, -1));
+
+               free(tmp);
+       }
+
+       Jim_SetResult(interp, result_dict);
+
+       return JIM_OK;
+}
+
+static int target_jim_set_reg(Jim_Interp *interp, int argc,
+               Jim_Obj * const *argv)
+{
+       if (argc != 2) {
+               Jim_WrongNumArgs(interp, 1, argv, "dict");
+               return JIM_ERR;
+       }
+
+       int tmp;
+#if JIM_VERSION >= 80
+       Jim_Obj **dict = Jim_DictPairs(interp, argv[1], &tmp);
+
+       if (!dict)
+               return JIM_ERR;
+#else
+       Jim_Obj **dict;
+       int ret = Jim_DictPairs(interp, argv[1], &dict, &tmp);
+
+       if (ret != JIM_OK)
+               return ret;
+#endif
+
+       const unsigned int length = tmp;
+       struct command_context *cmd_ctx = current_command_context(interp);
+       assert(cmd_ctx);
+       const struct target *target = get_current_target(cmd_ctx);
+
+       for (unsigned int i = 0; i < length; i += 2) {
+               const char *reg_name = Jim_String(dict[i]);
+               const char *reg_value = Jim_String(dict[i + 1]);
+               struct reg *reg = register_get_by_name(target->reg_cache, reg_name,
+                       false);
+
+               if (!reg || !reg->exist) {
+                       Jim_SetResultFormatted(interp, "unknown register '%s'", reg_name);
+                       return JIM_ERR;
+               }
+
+               uint8_t *buf = malloc(DIV_ROUND_UP(reg->size, 8));
+
+               if (!buf) {
+                       LOG_ERROR("Failed to allocate memory");
+                       return JIM_ERR;
+               }
+
+               str_to_buf(reg_value, strlen(reg_value), buf, reg->size, 0);
+               int retval = reg->type->set(reg, buf);
+               free(buf);
+
+               if (retval != ERROR_OK) {
+                       Jim_SetResultFormatted(interp, "failed to set '%s' to register '%s'",
+                               reg_value, reg_name);
+                       return JIM_ERR;
+               }
+       }
+
+       return JIM_OK;
 }
 
 /**
@@ -4609,7 +5286,7 @@ bool target_has_event_action(struct target *target, enum target_event event)
 {
        struct target_event_action *teap;
 
-       for (teap = target->event_action; teap != NULL; teap = teap->next) {
+       for (teap = target->event_action; teap; teap = teap->next) {
                if (teap->event == event)
                        return true;
        }
@@ -4630,28 +5307,30 @@ enum target_cfg_param {
        TCFG_RTOS,
        TCFG_DEFER_EXAMINE,
        TCFG_GDB_PORT,
+       TCFG_GDB_MAX_CONNECTIONS,
 };
 
-static Jim_Nvp nvp_config_opts[] = {
+static struct jim_nvp nvp_config_opts[] = {
        { .name = "-type",             .value = TCFG_TYPE },
        { .name = "-event",            .value = TCFG_EVENT },
        { .name = "-work-area-virt",   .value = TCFG_WORK_AREA_VIRT },
        { .name = "-work-area-phys",   .value = TCFG_WORK_AREA_PHYS },
        { .name = "-work-area-size",   .value = TCFG_WORK_AREA_SIZE },
        { .name = "-work-area-backup", .value = TCFG_WORK_AREA_BACKUP },
-       { .name = "-endian" ,          .value = TCFG_ENDIAN },
+       { .name = "-endian"          .value = TCFG_ENDIAN },
        { .name = "-coreid",           .value = TCFG_COREID },
        { .name = "-chain-position",   .value = TCFG_CHAIN_POSITION },
        { .name = "-dbgbase",          .value = TCFG_DBGBASE },
        { .name = "-rtos",             .value = TCFG_RTOS },
        { .name = "-defer-examine",    .value = TCFG_DEFER_EXAMINE },
        { .name = "-gdb-port",         .value = TCFG_GDB_PORT },
+       { .name = "-gdb-max-connections",   .value = TCFG_GDB_MAX_CONNECTIONS },
        { .name = NULL, .value = -1 }
 };
 
-static int target_configure(Jim_GetOptInfo *goi, struct target *target)
+static int target_configure(struct jim_getopt_info *goi, struct target *target)
 {
-       Jim_Nvp *n;
+       struct jim_nvp *n;
        Jim_Obj *o;
        jim_wide w;
        int e;
@@ -4659,7 +5338,7 @@ static int target_configure(Jim_GetOptInfo *goi, struct target *target)
        /* parse config or cget options ... */
        while (goi->argc > 0) {
                Jim_SetEmptyResult(goi->interp);
-               /* Jim_GetOpt_Debug(goi); */
+               /* jim_getopt_debug(goi); */
 
                if (target->type->target_jim_configure) {
                        /* target defines a configure function */
@@ -4675,14 +5354,14 @@ static int target_configure(Jim_GetOptInfo *goi, struct target *target)
                        }
                        /* otherwise we 'continue' below */
                }
-               e = Jim_GetOpt_Nvp(goi, nvp_config_opts, &n);
+               e = jim_getopt_nvp(goi, nvp_config_opts, &n);
                if (e != JIM_OK) {
-                       Jim_GetOpt_NvpUnknown(goi, nvp_config_opts, 0);
+                       jim_getopt_nvp_unknown(goi, nvp_config_opts, 0);
                        return e;
                }
                switch (n->value) {
                case TCFG_TYPE:
-                       /* not setable */
+                       /* not settable */
                        if (goi->isconfigure) {
                                Jim_SetResultFormatted(goi->interp,
                                                "not settable: %s", n->name);
@@ -4706,9 +5385,9 @@ no_params:
                                return JIM_ERR;
                        }
 
-                       e = Jim_GetOpt_Nvp(goi, nvp_target_event, &n);
+                       e = jim_getopt_nvp(goi, nvp_target_event, &n);
                        if (e != JIM_OK) {
-                               Jim_GetOpt_NvpUnknown(goi, nvp_target_event, 1);
+                               jim_getopt_nvp_unknown(goi, nvp_target_event, 1);
                                return e;
                        }
 
@@ -4736,15 +5415,20 @@ no_params:
                                }
 
                                if (goi->isconfigure) {
+                                       /* START_DEPRECATED_TPIU */
+                                       if (n->value == TARGET_EVENT_TRACE_CONFIG)
+                                               LOG_INFO("DEPRECATED target event %s; use TPIU events {pre,post}-{enable,disable}", n->name);
+                                       /* END_DEPRECATED_TPIU */
+
                                        bool replace = true;
-                                       if (teap == NULL) {
+                                       if (!teap) {
                                                /* create new */
                                                teap = calloc(1, sizeof(*teap));
                                                replace = false;
                                        }
                                        teap->event = n->value;
                                        teap->interp = goi->interp;
-                                       Jim_GetOpt_Obj(goi, &o);
+                                       jim_getopt_obj(goi, &o);
                                        if (teap->body)
                                                Jim_DecrRefCount(teap->interp, teap->body);
                                        teap->body  = Jim_DuplicateObj(goi->interp, o);
@@ -4768,7 +5452,7 @@ no_params:
                                        Jim_SetEmptyResult(goi->interp);
                                } else {
                                        /* get */
-                                       if (teap == NULL)
+                                       if (!teap)
                                                Jim_SetEmptyResult(goi->interp);
                                        else
                                                Jim_SetResult(goi->interp, Jim_DuplicateObj(goi->interp, teap->body));
@@ -4780,7 +5464,7 @@ no_params:
                case TCFG_WORK_AREA_VIRT:
                        if (goi->isconfigure) {
                                target_free_all_working_areas(target);
-                               e = Jim_GetOpt_Wide(goi, &w);
+                               e = jim_getopt_wide(goi, &w);
                                if (e != JIM_OK)
                                        return e;
                                target->working_area_virt = w;
@@ -4796,7 +5480,7 @@ no_params:
                case TCFG_WORK_AREA_PHYS:
                        if (goi->isconfigure) {
                                target_free_all_working_areas(target);
-                               e = Jim_GetOpt_Wide(goi, &w);
+                               e = jim_getopt_wide(goi, &w);
                                if (e != JIM_OK)
                                        return e;
                                target->working_area_phys = w;
@@ -4812,7 +5496,7 @@ no_params:
                case TCFG_WORK_AREA_SIZE:
                        if (goi->isconfigure) {
                                target_free_all_working_areas(target);
-                               e = Jim_GetOpt_Wide(goi, &w);
+                               e = jim_getopt_wide(goi, &w);
                                if (e != JIM_OK)
                                        return e;
                                target->working_area_size = w;
@@ -4827,7 +5511,7 @@ no_params:
                case TCFG_WORK_AREA_BACKUP:
                        if (goi->isconfigure) {
                                target_free_all_working_areas(target);
-                               e = Jim_GetOpt_Wide(goi, &w);
+                               e = jim_getopt_wide(goi, &w);
                                if (e != JIM_OK)
                                        return e;
                                /* make this exactly 1 or 0 */
@@ -4843,9 +5527,9 @@ no_params:
 
                case TCFG_ENDIAN:
                        if (goi->isconfigure) {
-                               e = Jim_GetOpt_Nvp(goi, nvp_target_endian, &n);
+                               e = jim_getopt_nvp(goi, nvp_target_endian, &n);
                                if (e != JIM_OK) {
-                                       Jim_GetOpt_NvpUnknown(goi, nvp_target_endian, 1);
+                                       jim_getopt_nvp_unknown(goi, nvp_target_endian, 1);
                                        return e;
                                }
                                target->endianness = n->value;
@@ -4853,10 +5537,10 @@ no_params:
                                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) {
                                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);
                        /* loop for more */
@@ -4864,7 +5548,7 @@ no_params:
 
                case TCFG_COREID:
                        if (goi->isconfigure) {
-                               e = Jim_GetOpt_Wide(goi, &w);
+                               e = jim_getopt_wide(goi, &w);
                                if (e != JIM_OK)
                                        return e;
                                target->coreid = (int32_t)w;
@@ -4888,11 +5572,11 @@ no_params:
                                }
 
                                target_free_all_working_areas(target);
-                               e = Jim_GetOpt_Obj(goi, &o_t);
+                               e = jim_getopt_obj(goi, &o_t);
                                if (e != JIM_OK)
                                        return e;
                                tap = jtag_tap_by_jim_obj(goi->interp, o_t);
-                               if (tap == NULL)
+                               if (!tap)
                                        return JIM_ERR;
                                target->tap = tap;
                                target->tap_configured = true;
@@ -4905,7 +5589,7 @@ no_params:
                        break;
                case TCFG_DBGBASE:
                        if (goi->isconfigure) {
-                               e = Jim_GetOpt_Wide(goi, &w);
+                               e = jim_getopt_wide(goi, &w);
                                if (e != JIM_OK)
                                        return e;
                                target->dbgbase = (uint32_t)w;
@@ -4942,17 +5626,37 @@ no_params:
                                }
 
                                const char *s;
-                               e = Jim_GetOpt_String(goi, &s, NULL);
+                               e = jim_getopt_string(goi, &s, NULL);
                                if (e != JIM_OK)
                                        return e;
+                               free(target->gdb_port_override);
                                target->gdb_port_override = strdup(s);
                        } else {
                                if (goi->argc != 0)
                                        goto no_params;
                        }
-                       Jim_SetResultString(goi->interp, target->gdb_port_override ? : "undefined", -1);
+                       Jim_SetResultString(goi->interp, target->gdb_port_override ? target->gdb_port_override : "undefined", -1);
                        /* loop for more */
                        break;
+
+               case TCFG_GDB_MAX_CONNECTIONS:
+                       if (goi->isconfigure) {
+                               struct command_context *cmd_ctx = current_command_context(goi->interp);
+                               if (cmd_ctx->mode != COMMAND_CONFIG) {
+                                       Jim_SetResultString(goi->interp, "-gdb-max-connections must be configured before 'init'", -1);
+                                       return JIM_ERR;
+                               }
+
+                               e = jim_getopt_wide(goi, &w);
+                               if (e != JIM_OK)
+                                       return e;
+                               target->gdb_max_connections = (w < 0) ? CONNECTION_LIMIT_UNLIMITED : (int)w;
+                       } else {
+                               if (goi->argc != 0)
+                                       goto no_params;
+                       }
+                       Jim_SetResult(goi->interp, Jim_NewIntObj(goi->interp, target->gdb_max_connections));
+                       break;
                }
        } /* while (goi->argc) */
 
@@ -4963,30 +5667,37 @@ no_params:
 
 static int jim_target_configure(Jim_Interp *interp, int argc, Jim_Obj * const *argv)
 {
-       Jim_GetOptInfo goi;
+       struct command *c = jim_to_command(interp);
+       struct jim_getopt_info goi;
 
-       Jim_GetOpt_Setup(&goi, interp, argc - 1, argv + 1);
-       goi.isconfigure = !strcmp(Jim_GetString(argv[0], NULL), "configure");
+       jim_getopt_setup(&goi, interp, argc - 1, argv + 1);
+       goi.isconfigure = !strcmp(c->name, "configure");
        if (goi.argc < 1) {
                Jim_WrongNumArgs(goi.interp, goi.argc, goi.argv,
                                 "missing: -option ...");
                return JIM_ERR;
        }
-       struct target *target = Jim_CmdPrivData(goi.interp);
+       struct command_context *cmd_ctx = current_command_context(interp);
+       assert(cmd_ctx);
+       struct target *target = get_current_target(cmd_ctx);
        return target_configure(&goi, target);
 }
 
 static int jim_target_mem2array(Jim_Interp *interp,
                int argc, Jim_Obj *const *argv)
 {
-       struct target *target = Jim_CmdPrivData(interp);
+       struct command_context *cmd_ctx = current_command_context(interp);
+       assert(cmd_ctx);
+       struct target *target = get_current_target(cmd_ctx);
        return target_mem2array(interp, target, argc - 1, argv + 1);
 }
 
 static int jim_target_array2mem(Jim_Interp *interp,
                int argc, Jim_Obj *const *argv)
 {
-       struct target *target = Jim_CmdPrivData(interp);
+       struct command_context *cmd_ctx = current_command_context(interp);
+       assert(cmd_ctx);
+       struct target *target = get_current_target(cmd_ctx);
        return target_array2mem(interp, target, argc - 1, argv + 1);
 }
 
@@ -5000,8 +5711,8 @@ static int jim_target_examine(Jim_Interp *interp, int argc, Jim_Obj *const *argv
 {
        bool allow_defer = false;
 
-       Jim_GetOptInfo goi;
-       Jim_GetOpt_Setup(&goi, interp, argc - 1, argv + 1);
+       struct jim_getopt_info goi;
+       jim_getopt_setup(&goi, interp, argc - 1, argv + 1);
        if (goi.argc > 1) {
                const char *cmd_name = Jim_GetString(argv[0], NULL);
                Jim_SetResultFormatted(goi.interp,
@@ -5012,13 +5723,15 @@ static int jim_target_examine(Jim_Interp *interp, int argc, Jim_Obj *const *argv
            strcmp(Jim_GetString(argv[1], NULL), "allow-defer") == 0) {
                /* consume it */
                Jim_Obj *obj;
-               int e = Jim_GetOpt_Obj(&goi, &obj);
+               int e = jim_getopt_obj(&goi, &obj);
                if (e != JIM_OK)
                        return e;
                allow_defer = true;
        }
 
-       struct target *target = Jim_CmdPrivData(interp);
+       struct command_context *cmd_ctx = current_command_context(interp);
+       assert(cmd_ctx);
+       struct target *target = get_current_target(cmd_ctx);
        if (!target->tap->enabled)
                return jim_target_tap_disabled(interp);
 
@@ -5029,14 +5742,21 @@ static int jim_target_examine(Jim_Interp *interp, int argc, Jim_Obj *const *argv
        }
 
        int e = target->type->examine(target);
-       if (e != ERROR_OK)
+       if (e != ERROR_OK) {
+               target_reset_examined(target);
                return JIM_ERR;
+       }
+
+       target_set_examined(target);
+
        return JIM_OK;
 }
 
 static int jim_target_was_examined(Jim_Interp *interp, int argc, Jim_Obj * const *argv)
 {
-       struct target *target = Jim_CmdPrivData(interp);
+       struct command_context *cmd_ctx = current_command_context(interp);
+       assert(cmd_ctx);
+       struct target *target = get_current_target(cmd_ctx);
 
        Jim_SetResultBool(interp, target_was_examined(target));
        return JIM_OK;
@@ -5044,7 +5764,9 @@ static int jim_target_was_examined(Jim_Interp *interp, int argc, Jim_Obj * const
 
 static int jim_target_examine_deferred(Jim_Interp *interp, int argc, Jim_Obj * const *argv)
 {
-       struct target *target = Jim_CmdPrivData(interp);
+       struct command_context *cmd_ctx = current_command_context(interp);
+       assert(cmd_ctx);
+       struct target *target = get_current_target(cmd_ctx);
 
        Jim_SetResultBool(interp, target->defer_examine);
        return JIM_OK;
@@ -5056,7 +5778,9 @@ static int jim_target_halt_gdb(Jim_Interp *interp, int argc, Jim_Obj *const *arg
                Jim_WrongNumArgs(interp, 1, argv, "[no parameters]");
                return JIM_ERR;
        }
-       struct target *target = Jim_CmdPrivData(interp);
+       struct command_context *cmd_ctx = current_command_context(interp);
+       assert(cmd_ctx);
+       struct target *target = get_current_target(cmd_ctx);
 
        if (target_call_event_callbacks(target, TARGET_EVENT_GDB_HALT) != ERROR_OK)
                return JIM_ERR;
@@ -5070,7 +5794,9 @@ static int jim_target_poll(Jim_Interp *interp, int argc, Jim_Obj *const *argv)
                Jim_WrongNumArgs(interp, 1, argv, "[no parameters]");
                return JIM_ERR;
        }
-       struct target *target = Jim_CmdPrivData(interp);
+       struct command_context *cmd_ctx = current_command_context(interp);
+       assert(cmd_ctx);
+       struct target *target = get_current_target(cmd_ctx);
        if (!target->tap->enabled)
                return jim_target_tap_disabled(interp);
 
@@ -5086,8 +5812,8 @@ static int jim_target_poll(Jim_Interp *interp, int argc, Jim_Obj *const *argv)
 
 static int jim_target_reset(Jim_Interp *interp, int argc, Jim_Obj *const *argv)
 {
-       Jim_GetOptInfo goi;
-       Jim_GetOpt_Setup(&goi, interp, argc - 1, argv + 1);
+       struct jim_getopt_info goi;
+       jim_getopt_setup(&goi, interp, argc - 1, argv + 1);
 
        if (goi.argc != 2) {
                Jim_WrongNumArgs(interp, 0, argv,
@@ -5095,19 +5821,21 @@ static int jim_target_reset(Jim_Interp *interp, int argc, Jim_Obj *const *argv)
                return JIM_ERR;
        }
 
-       Jim_Nvp *n;
-       int e = Jim_GetOpt_Nvp(&goi, nvp_assert, &n);
+       struct jim_nvp *n;
+       int e = jim_getopt_nvp(&goi, nvp_assert, &n);
        if (e != JIM_OK) {
-               Jim_GetOpt_NvpUnknown(&goi, nvp_assert, 1);
+               jim_getopt_nvp_unknown(&goi, nvp_assert, 1);
                return e;
        }
        /* the halt or not param */
        jim_wide a;
-       e = Jim_GetOpt_Wide(&goi, &a);
+       e = jim_getopt_wide(&goi, &a);
        if (e != JIM_OK)
                return e;
 
-       struct target *target = Jim_CmdPrivData(goi.interp);
+       struct command_context *cmd_ctx = current_command_context(interp);
+       assert(cmd_ctx);
+       struct target *target = get_current_target(cmd_ctx);
        if (!target->tap->enabled)
                return jim_target_tap_disabled(interp);
 
@@ -5122,7 +5850,7 @@ static int jim_target_reset(Jim_Interp *interp, int argc, Jim_Obj *const *argv)
                target_reset_examined(target);
 
        /* determine if we should halt or not. */
-       target->reset_halt = !!a;
+       target->reset_halt = (a != 0);
        /* When this happens - all workareas are invalid. */
        target_free_all_working_areas_restore(target, 0);
 
@@ -5140,7 +5868,9 @@ static int jim_target_halt(Jim_Interp *interp, int argc, Jim_Obj *const *argv)
                Jim_WrongNumArgs(interp, 1, argv, "[no parameters]");
                return JIM_ERR;
        }
-       struct target *target = Jim_CmdPrivData(interp);
+       struct command_context *cmd_ctx = current_command_context(interp);
+       assert(cmd_ctx);
+       struct target *target = get_current_target(cmd_ctx);
        if (!target->tap->enabled)
                return jim_target_tap_disabled(interp);
        int e = target->type->halt(target);
@@ -5149,8 +5879,8 @@ static int jim_target_halt(Jim_Interp *interp, int argc, Jim_Obj *const *argv)
 
 static int jim_target_wait_state(Jim_Interp *interp, int argc, Jim_Obj *const *argv)
 {
-       Jim_GetOptInfo goi;
-       Jim_GetOpt_Setup(&goi, interp, argc - 1, argv + 1);
+       struct jim_getopt_info goi;
+       jim_getopt_setup(&goi, interp, argc - 1, argv + 1);
 
        /* params:  <name>  statename timeoutmsecs */
        if (goi.argc != 2) {
@@ -5160,27 +5890,29 @@ static int jim_target_wait_state(Jim_Interp *interp, int argc, Jim_Obj *const *a
                return JIM_ERR;
        }
 
-       Jim_Nvp *n;
-       int e = Jim_GetOpt_Nvp(&goi, nvp_target_state, &n);
+       struct jim_nvp *n;
+       int e = jim_getopt_nvp(&goi, nvp_target_state, &n);
        if (e != JIM_OK) {
-               Jim_GetOpt_NvpUnknown(&goi, nvp_target_state, 1);
+               jim_getopt_nvp_unknown(&goi, nvp_target_state, 1);
                return e;
        }
        jim_wide a;
-       e = Jim_GetOpt_Wide(&goi, &a);
+       e = jim_getopt_wide(&goi, &a);
        if (e != JIM_OK)
                return e;
-       struct target *target = Jim_CmdPrivData(interp);
+       struct command_context *cmd_ctx = current_command_context(interp);
+       assert(cmd_ctx);
+       struct target *target = get_current_target(cmd_ctx);
        if (!target->tap->enabled)
                return jim_target_tap_disabled(interp);
 
        e = target_wait_state(target, n->value, a);
        if (e != ERROR_OK) {
-               Jim_Obj *eObj = Jim_NewIntObj(interp, e);
+               Jim_Obj *obj = Jim_NewIntObj(interp, e);
                Jim_SetResultFormatted(goi.interp,
                                "target: %s wait %s fails (%#s) %s",
                                target_name(target), n->name,
-                               eObj, target_strerror_safe(e));
+                               obj, target_strerror_safe(e));
                return JIM_ERR;
        }
        return JIM_OK;
@@ -5200,9 +5932,9 @@ COMMAND_HANDLER(handle_target_event_list)
        command_print(CMD, "------------------------- | "
                        "----------------------------------------");
        while (teap) {
-               Jim_Nvp *opt = Jim_Nvp_value2name_simple(nvp_target_event, teap->event);
                command_print(CMD, "%-25s | %s",
-                               opt->name, Jim_GetString(teap->body, NULL));
+                               target_event_name(teap->event),
+                               Jim_GetString(teap->body, NULL));
                teap = teap->next;
        }
        command_print(CMD, "***END***");
@@ -5214,26 +5946,30 @@ static int jim_target_current_state(Jim_Interp *interp, int argc, Jim_Obj *const
                Jim_WrongNumArgs(interp, 1, argv, "[no parameters]");
                return JIM_ERR;
        }
-       struct target *target = Jim_CmdPrivData(interp);
+       struct command_context *cmd_ctx = current_command_context(interp);
+       assert(cmd_ctx);
+       struct target *target = get_current_target(cmd_ctx);
        Jim_SetResultString(interp, target_state_name(target), -1);
        return JIM_OK;
 }
 static int jim_target_invoke_event(Jim_Interp *interp, int argc, Jim_Obj *const *argv)
 {
-       Jim_GetOptInfo goi;
-       Jim_GetOpt_Setup(&goi, interp, argc - 1, argv + 1);
+       struct jim_getopt_info goi;
+       jim_getopt_setup(&goi, interp, argc - 1, argv + 1);
        if (goi.argc != 1) {
                const char *cmd_name = Jim_GetString(argv[0], NULL);
                Jim_SetResultFormatted(goi.interp, "%s <eventname>", cmd_name);
                return JIM_ERR;
        }
-       Jim_Nvp *n;
-       int e = Jim_GetOpt_Nvp(&goi, nvp_target_event, &n);
+       struct jim_nvp *n;
+       int e = jim_getopt_nvp(&goi, nvp_target_event, &n);
        if (e != JIM_OK) {
-               Jim_GetOpt_NvpUnknown(&goi, nvp_target_event, 1);
+               jim_getopt_nvp_unknown(&goi, nvp_target_event, 1);
                return e;
        }
-       struct target *target = Jim_CmdPrivData(interp);
+       struct command_context *cmd_ctx = current_command_context(interp);
+       assert(cmd_ctx);
+       struct target *target = get_current_target(cmd_ctx);
        target_handle_event(target, n->value);
        return JIM_OK;
 }
@@ -5325,6 +6061,34 @@ static const struct command_registration target_instance_command_handlers[] = {
                        "from target memory",
                .usage = "arrayname bitwidth address count",
        },
+       {
+               .name = "get_reg",
+               .mode = COMMAND_EXEC,
+               .jim_handler = target_jim_get_reg,
+               .help = "Get register values from the target",
+               .usage = "list",
+       },
+       {
+               .name = "set_reg",
+               .mode = COMMAND_EXEC,
+               .jim_handler = target_jim_set_reg,
+               .help = "Set target register values",
+               .usage = "dict",
+       },
+       {
+               .name = "read_memory",
+               .mode = COMMAND_EXEC,
+               .jim_handler = target_jim_read_memory,
+               .help = "Read Tcl list of 8/16/32/64 bit numbers from target memory",
+               .usage = "address width count ['phys']",
+       },
+       {
+               .name = "write_memory",
+               .mode = COMMAND_EXEC,
+               .jim_handler = target_jim_write_memory,
+               .help = "Write Tcl list of 8/16/32/64 bit numbers to target memory",
+               .usage = "address width data ['phys']",
+       },
        {
                .name = "eventlist",
                .handler = handle_target_event_list,
@@ -5397,7 +6161,7 @@ static const struct command_registration target_instance_command_handlers[] = {
        COMMAND_REGISTRATION_DONE
 };
 
-static int target_create(Jim_GetOptInfo *goi)
+static int target_create(struct jim_getopt_info *goi)
 {
        Jim_Obj *new_cmd;
        Jim_Cmd *cmd;
@@ -5408,7 +6172,7 @@ static int target_create(Jim_GetOptInfo *goi)
        struct command_context *cmd_ctx;
 
        cmd_ctx = current_command_context(goi->interp);
-       assert(cmd_ctx != NULL);
+       assert(cmd_ctx);
 
        if (goi->argc < 3) {
                Jim_WrongNumArgs(goi->interp, 1, goi->argv, "?name? ?type? ..options...");
@@ -5416,9 +6180,9 @@ static int target_create(Jim_GetOptInfo *goi)
        }
 
        /* 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);
+       cmd = Jim_GetCommand(goi->interp, new_cmd, JIM_NONE);
        if (cmd) {
                cp = Jim_GetString(new_cmd, NULL);
                Jim_SetResultFormatted(goi->interp, "Command/target: %s Exists", cp);
@@ -5426,7 +6190,7 @@ static int target_create(Jim_GetOptInfo *goi)
        }
 
        /* TYPE */
-       e = Jim_GetOpt_String(goi, &cp, NULL);
+       e = jim_getopt_string(goi, &cp, NULL);
        if (e != JIM_OK)
                return e;
        struct transport *tr = get_current_transport();
@@ -5440,21 +6204,12 @@ static int target_create(Jim_GetOptInfo *goi)
        }
        /* now does target type exist */
        for (x = 0 ; target_types[x] ; x++) {
-               if (0 == strcmp(cp, target_types[x]->name)) {
+               if (strcmp(cp, target_types[x]->name) == 0) {
                        /* found */
                        break;
                }
-
-               /* check for deprecated name */
-               if (target_types[x]->deprecated_name) {
-                       if (0 == strcmp(cp, target_types[x]->deprecated_name)) {
-                               /* found */
-                               LOG_WARNING("target name is deprecated use: \'%s\'", target_types[x]->name);
-                               break;
-                       }
-               }
        }
-       if (target_types[x] == NULL) {
+       if (!target_types[x]) {
                Jim_SetResultFormatted(goi->interp, "Unknown target type %s, try one of ", cp);
                for (x = 0 ; target_types[x] ; x++) {
                        if (target_types[x + 1]) {
@@ -5474,18 +6229,27 @@ static int target_create(Jim_GetOptInfo *goi)
 
        /* Create it */
        target = calloc(1, sizeof(struct target));
+       if (!target) {
+               LOG_ERROR("Out of memory");
+               return JIM_ERR;
+       }
+
+       /* set empty smp cluster */
+       target->smp_targets = &empty_smp_targets;
+
        /* set target number */
        target->target_number = new_target_number();
-       cmd_ctx->current_target = target;
 
        /* allocate memory for each unique target type */
-       target->type = calloc(1, sizeof(struct target_type));
+       target->type = malloc(sizeof(struct target_type));
+       if (!target->type) {
+               LOG_ERROR("Out of memory");
+               free(target);
+               return JIM_ERR;
+       }
 
        memcpy(target->type, target_types[x], sizeof(struct target_type));
 
-       /* will be set by "-endian" */
-       target->endianness = TARGET_ENDIAN_UNKNOWN;
-
        /* default to first core, override with -coreid */
        target->coreid = 0;
 
@@ -5508,6 +6272,12 @@ static int target_create(Jim_GetOptInfo *goi)
 
        /* initialize trace information */
        target->trace_info = calloc(1, sizeof(struct trace));
+       if (!target->trace_info) {
+               LOG_ERROR("Out of memory");
+               free(target->type);
+               free(target);
+               return JIM_ERR;
+       }
 
        target->dbgmsg          = NULL;
        target->dbg_msg_enabled = 0;
@@ -5518,6 +6288,7 @@ static int target_create(Jim_GetOptInfo *goi)
        target->rtos_auto_detect = false;
 
        target->gdb_port_override = NULL;
+       target->gdb_max_connections = 1;
 
        /* Do the rest as "configure" options */
        goi->isconfigure = 1;
@@ -5536,12 +6307,14 @@ static int target_create(Jim_GetOptInfo *goi)
                        }
                }
                /* tap must be set after target was configured */
-               if (target->tap == NULL)
+               if (!target->tap)
                        e = JIM_ERR;
        }
 
        if (e != JIM_OK) {
+               rtos_destroy(target);
                free(target->gdb_port_override);
+               free(target->trace_info);
                free(target->type);
                free(target);
                return e;
@@ -5554,14 +6327,25 @@ static int target_create(Jim_GetOptInfo *goi)
 
        cp = Jim_GetString(new_cmd, NULL);
        target->cmd_name = strdup(cp);
+       if (!target->cmd_name) {
+               LOG_ERROR("Out of memory");
+               rtos_destroy(target);
+               free(target->gdb_port_override);
+               free(target->trace_info);
+               free(target->type);
+               free(target);
+               return JIM_ERR;
+       }
 
        if (target->type->target_create) {
                e = (*(target->type->target_create))(target, goi->interp);
                if (e != ERROR_OK) {
                        LOG_DEBUG("target_create failed");
+                       free(target->cmd_name);
+                       rtos_destroy(target);
                        free(target->gdb_port_override);
+                       free(target->trace_info);
                        free(target->type);
-                       free(target->cmd_name);
                        free(target);
                        return JIM_ERR;
                }
@@ -5570,19 +6354,10 @@ static int target_create(Jim_GetOptInfo *goi)
        /* create the target specific commands */
        if (target->type->commands) {
                e = register_commands(cmd_ctx, NULL, target->type->commands);
-               if (ERROR_OK != e)
+               if (e != ERROR_OK)
                        LOG_ERROR("unable to register '%s' commands", cp);
        }
 
-       /* append to end of list */
-       {
-               struct target **tpp;
-               tpp = &(all_targets);
-               while (*tpp)
-                       tpp = &((*tpp)->next);
-               *tpp = target;
-       }
-
        /* now - create the new target name command */
        const struct command_registration target_subcommands[] = {
                {
@@ -5603,15 +6378,24 @@ static int target_create(Jim_GetOptInfo *goi)
                },
                COMMAND_REGISTRATION_DONE
        };
-       e = register_commands(cmd_ctx, NULL, target_commands);
-       if (ERROR_OK != e)
+       e = register_commands_override_target(cmd_ctx, NULL, target_commands, target);
+       if (e != ERROR_OK) {
+               if (target->type->deinit_target)
+                       target->type->deinit_target(target);
+               free(target->cmd_name);
+               rtos_destroy(target);
+               free(target->gdb_port_override);
+               free(target->trace_info);
+               free(target->type);
+               free(target);
                return JIM_ERR;
+       }
 
-       struct command *c = command_find_in_context(cmd_ctx, cp);
-       assert(c);
-       command_set_handler_data(c, target);
+       /* append to end of list */
+       append_to_list_all_targets(target);
 
-       return (ERROR_OK == e) ? JIM_OK : JIM_ERR;
+       cmd_ctx->current_target = target;
+       return JIM_OK;
 }
 
 static int jim_target_current(Jim_Interp *interp, int argc, Jim_Obj *const *argv)
@@ -5621,9 +6405,11 @@ static int jim_target_current(Jim_Interp *interp, int argc, Jim_Obj *const *argv
                return JIM_ERR;
        }
        struct command_context *cmd_ctx = current_command_context(interp);
-       assert(cmd_ctx != NULL);
+       assert(cmd_ctx);
 
-       Jim_SetResultString(interp, target_name(get_current_target(cmd_ctx)), -1);
+       struct target *target = get_current_target_or_null(cmd_ctx);
+       if (target)
+               Jim_SetResultString(interp, target_name(target), -1);
        return JIM_OK;
 }
 
@@ -5634,7 +6420,7 @@ static int jim_target_types(Jim_Interp *interp, int argc, Jim_Obj *const *argv)
                return JIM_ERR;
        }
        Jim_SetResult(interp, Jim_NewListObj(interp, NULL, 0));
-       for (unsigned x = 0; NULL != target_types[x]; x++) {
+       for (unsigned x = 0; target_types[x]; x++) {
                Jim_ListAppendElement(interp, Jim_GetResult(interp),
                        Jim_NewStringObj(interp, target_types[x]->name, -1));
        }
@@ -5662,18 +6448,24 @@ static int jim_target_smp(Jim_Interp *interp, int argc, Jim_Obj *const *argv)
        int i;
        const char *targetname;
        int retval, len;
-       struct target *target = (struct target *) NULL;
-       struct target_list *head, *curr, *new;
-       curr = (struct target_list *) NULL;
-       head = (struct target_list *) NULL;
+       static int smp_group = 1;
+       struct target *target = NULL;
+       struct target_list *head, *new;
 
        retval = 0;
        LOG_DEBUG("%d", argc);
        /* argv[1] = target to associate in smp
-        * argv[2] = target to assoicate in smp
+        * argv[2] = target to associate in smp
         * argv[3] ...
         */
 
+       struct list_head *lh = malloc(sizeof(*lh));
+       if (!lh) {
+               LOG_ERROR("Out of memory");
+               return JIM_ERR;
+       }
+       INIT_LIST_HEAD(lh);
+
        for (i = 1; i < argc; i++) {
 
                targetname = Jim_GetString(argv[i], &len);
@@ -5682,28 +6474,19 @@ static int jim_target_smp(Jim_Interp *interp, int argc, Jim_Obj *const *argv)
                if (target) {
                        new = malloc(sizeof(struct target_list));
                        new->target = target;
-                       new->next = (struct target_list *)NULL;
-                       if (head == (struct target_list *)NULL) {
-                               head = new;
-                               curr = head;
-                       } else {
-                               curr->next = new;
-                               curr = new;
-                       }
+                       list_add_tail(&new->lh, lh);
                }
        }
        /*  now parse the list of cpu and put the target in smp mode*/
-       curr = head;
-
-       while (curr != (struct target_list *)NULL) {
-               target = curr->target;
-               target->smp = 1;
-               target->head = head;
-               curr = curr->next;
+       foreach_smp_target(head, lh) {
+               target = head->target;
+               target->smp = smp_group;
+               target->smp_targets = lh;
        }
+       smp_group++;
 
        if (target && target->rtos)
-               retval = rtos_smp_init(head->target);
+               retval = rtos_smp_init(target);
 
        return retval;
 }
@@ -5711,8 +6494,8 @@ static int jim_target_smp(Jim_Interp *interp, int argc, Jim_Obj *const *argv)
 
 static int jim_target_create(Jim_Interp *interp, int argc, Jim_Obj *const *argv)
 {
-       Jim_GetOptInfo goi;
-       Jim_GetOpt_Setup(&goi, interp, argc - 1, argv + 1);
+       struct jim_getopt_info goi;
+       jim_getopt_setup(&goi, interp, argc - 1, argv + 1);
        if (goi.argc < 3) {
                Jim_WrongNumArgs(goi.interp, goi.argc, goi.argv,
                        "<name> <target_type> [<target_options> ...]");
@@ -5766,7 +6549,7 @@ static const struct command_registration target_subcommand_handlers[] = {
        COMMAND_REGISTRATION_DONE
 };
 
-struct FastLoad {
+struct fast_load {
        target_addr_t address;
        uint8_t *data;
        int length;
@@ -5774,16 +6557,13 @@ struct FastLoad {
 };
 
 static int fastload_num;
-static struct FastLoad *fastload;
+static struct fast_load *fastload;
 
 static void free_fastload(void)
 {
-       if (fastload != NULL) {
-               int i;
-               for (i = 0; i < fastload_num; i++) {
-                       if (fastload[i].data)
-                               free(fastload[i].data);
-               }
+       if (fastload) {
+               for (int i = 0; i < fastload_num; i++)
+                       free(fastload[i].data);
                free(fastload);
                fastload = NULL;
        }
@@ -5796,13 +6576,12 @@ COMMAND_HANDLER(handle_fast_load_image_command)
        uint32_t image_size;
        target_addr_t min_address = 0;
        target_addr_t max_address = -1;
-       int i;
 
        struct image image;
 
-       int retval = CALL_COMMAND_HANDLER(parse_load_image_command_CMD_ARGV,
+       int retval = CALL_COMMAND_HANDLER(parse_load_image_command,
                        &image, &min_address, &max_address);
-       if (ERROR_OK != retval)
+       if (retval != ERROR_OK)
                return retval;
 
        struct duration bench;
@@ -5815,16 +6594,16 @@ COMMAND_HANDLER(handle_fast_load_image_command)
        image_size = 0x0;
        retval = ERROR_OK;
        fastload_num = image.num_sections;
-       fastload = malloc(sizeof(struct FastLoad)*image.num_sections);
-       if (fastload == NULL) {
+       fastload = malloc(sizeof(struct fast_load)*image.num_sections);
+       if (!fastload) {
                command_print(CMD, "out of memory");
                image_close(&image);
                return ERROR_FAIL;
        }
-       memset(fastload, 0, sizeof(struct FastLoad)*image.num_sections);
-       for (i = 0; i < image.num_sections; i++) {
+       memset(fastload, 0, sizeof(struct fast_load)*image.num_sections);
+       for (unsigned int i = 0; i < image.num_sections; i++) {
                buffer = malloc(image.sections[i].size);
-               if (buffer == NULL) {
+               if (!buffer) {
                        command_print(CMD, "error allocating buffer for section (%d bytes)",
                                                  (int)(image.sections[i].size));
                        retval = ERROR_FAIL;
@@ -5840,7 +6619,7 @@ COMMAND_HANDLER(handle_fast_load_image_command)
                uint32_t offset = 0;
                uint32_t length = buf_cnt;
 
-               /* DANGER!!! beware of unsigned comparision here!!! */
+               /* DANGER!!! beware of unsigned comparison here!!! */
 
                if ((image.sections[i].base_address + buf_cnt >= min_address) &&
                                (image.sections[i].base_address < max_address)) {
@@ -5855,7 +6634,7 @@ COMMAND_HANDLER(handle_fast_load_image_command)
 
                        fastload[i].address = image.sections[i].base_address + offset;
                        fastload[i].data = malloc(length);
-                       if (fastload[i].data == NULL) {
+                       if (!fastload[i].data) {
                                free(buffer);
                                command_print(CMD, "error allocating buffer for section (%" PRIu32 " bytes)",
                                                          length);
@@ -5874,7 +6653,7 @@ COMMAND_HANDLER(handle_fast_load_image_command)
                free(buffer);
        }
 
-       if ((ERROR_OK == retval) && (duration_measure(&bench) == ERROR_OK)) {
+       if ((retval == ERROR_OK) && (duration_measure(&bench) == ERROR_OK)) {
                command_print(CMD, "Loaded %" PRIu32 " bytes "
                                "in %fs (%0.3f KiB/s)", image_size,
                                duration_elapsed(&bench), duration_kbps(&bench, image_size));
@@ -5896,7 +6675,7 @@ COMMAND_HANDLER(handle_fast_load_command)
 {
        if (CMD_ARGC > 0)
                return ERROR_COMMAND_SYNTAX_ERROR;
-       if (fastload == NULL) {
+       if (!fastload) {
                LOG_ERROR("No image in memory");
                return ERROR_FAIL;
        }
@@ -5982,7 +6761,7 @@ COMMAND_HANDLER(handle_ps_command)
 
 static void binprint(struct command_invocation *cmd, const char *text, const uint8_t *buf, int size)
 {
-       if (text != NULL)
+       if (text)
                command_print_sameline(cmd, "%s", text);
        for (int i = 0; i < size; i++)
                command_print_sameline(cmd, " %02x", buf[i]);
@@ -6082,8 +6861,7 @@ next:
 out:
        free(test_pattern);
 
-       if (wa != NULL)
-               target_free_working_area(target, wa);
+       target_free_working_area(target, wa);
 
        /* Test writes */
        num_bytes = test_size + 4 + 4 + 4;
@@ -6167,8 +6945,7 @@ nextw:
 
        free(test_pattern);
 
-       if (wa != NULL)
-               target_free_working_area(target, wa);
+       target_free_working_area(target, wa);
        return retval;
 }
 
@@ -6381,35 +7158,47 @@ static const struct command_registration target_exec_command_handlers[] = {
                .usage = "filename [offset [type]]",
        },
        {
-               .name = "mem2array",
+               .name = "get_reg",
                .mode = COMMAND_EXEC,
-               .jim_handler = jim_mem2array,
-               .help = "read 8/16/32 bit memory and return as a TCL array "
-                       "for script processing",
-               .usage = "arrayname bitwidth address count",
+               .jim_handler = target_jim_get_reg,
+               .help = "Get register values from the target",
+               .usage = "list",
        },
        {
-               .name = "array2mem",
+               .name = "set_reg",
                .mode = COMMAND_EXEC,
-               .jim_handler = jim_array2mem,
-               .help = "convert a TCL array to memory locations "
-                       "and write the 8/16/32 bit values",
-               .usage = "arrayname bitwidth address count",
+               .jim_handler = target_jim_set_reg,
+               .help = "Set target register values",
+               .usage = "dict",
+       },
+       {
+               .name = "read_memory",
+               .mode = COMMAND_EXEC,
+               .jim_handler = target_jim_read_memory,
+               .help = "Read Tcl list of 8/16/32/64 bit numbers from target memory",
+               .usage = "address width count ['phys']",
+       },
+       {
+               .name = "write_memory",
+               .mode = COMMAND_EXEC,
+               .jim_handler = target_jim_write_memory,
+               .help = "Write Tcl list of 8/16/32/64 bit numbers to target memory",
+               .usage = "address width data ['phys']",
        },
        {
                .name = "reset_nag",
                .handler = handle_target_reset_nag,
                .mode = COMMAND_ANY,
                .help = "Nag after each reset about options that could have been "
-                               "enabled to improve performance. ",
+                               "enabled to improve performance.",
                .usage = "['enable'|'disable']",
        },
        {
                .name = "ps",
                .handler = handle_ps_command,
                .mode = COMMAND_EXEC,
-               .help = "list all tasks ",
-               .usage = " ",
+               .help = "list all tasks",
+               .usage = "",
        },
        {
                .name = "test_mem_access",