use COMMAND_HANDLER macro to define all commands
[fw/openocd] / src / target / etm.c
index 91c73a232db44e7a73f68b06c6aa8a930be91195..0fc924914ff79bb0a059cbf8fb2401c32238d363 100644 (file)
 #include "config.h"
 #endif
 
-#include "etm.h"
+#include "armv4_5.h"
 #include "etb.h"
 #include "image.h"
-#include "arm7_9_common.h"
 #include "arm_disassembler.h"
 
 
@@ -68,54 +67,61 @@ struct etm_reg_info {
 
 /*
  * Registers 0..0x7f are JTAG-addressable using scanchain 6.
+ * (Or on some processors, through coprocessor operations.)
  * Newer versions of ETM make some W/O registers R/W, and
  * provide definitions for some previously-unused bits.
  */
 
-/* basic registers that are always there given the right ETM version */
+/* core registers used to version/configure the ETM */
 static const struct etm_reg_info etm_core[] = {
-       /* NOTE: we "know" ETM_CONFIG is listed first */
-       { ETM_CONFIG, 32, RO, 0x10, "ETM_CONFIG", },
+       /* NOTE: we "know" the order here ... */
+       { ETM_CONFIG, 32, RO, 0x10, "ETM_config", },
+       { ETM_ID, 32, RO, 0x20, "ETM_id", },
+};
 
+/* basic registers that are always there given the right ETM version */
+static const struct etm_reg_info etm_basic[] = {
        /* ETM Trace Registers */
-       { ETM_CTRL, 32, RW, 0x10, "ETM_CTRL", },
-       { ETM_TRIG_EVENT, 17, WO, 0x10, "ETM_TRIG_EVENT", },
-       { ETM_ASIC_CTRL,  8, WO, 0x10, "ETM_ASIC_CTRL", },
-       { ETM_STATUS,  3, RO, 0x11, "ETM_STATUS", },
-       { ETM_SYS_CONFIG,  9, RO, 0x12, "ETM_SYS_CONFIG", },
+       { ETM_CTRL, 32, RW, 0x10, "ETM_ctrl", },
+       { ETM_TRIG_EVENT, 17, WO, 0x10, "ETM_trig_event", },
+       { ETM_ASIC_CTRL,  8, WO, 0x10, "ETM_asic_ctrl", },
+       { ETM_STATUS,  3, RO, 0x11, "ETM_status", },
+       { ETM_SYS_CONFIG,  9, RO, 0x12, "ETM_sys_config", },
 
        /* TraceEnable configuration */
-       { ETM_TRACE_RESOURCE_CTRL, 32, WO, 0x12, "ETM_TRACE_RESOURCE_CTRL", },
-       { ETM_TRACE_EN_CTRL2, 16, WO, 0x12, "ETM_TRACE_EN_CTRL2", },
-       { ETM_TRACE_EN_EVENT, 17, WO, 0x10, "ETM_TRACE_EN_EVENT", },
-       { ETM_TRACE_EN_CTRL1, 26, WO, 0x10, "ETM_TRACE_EN_CTRL1", },
+       { ETM_TRACE_RESOURCE_CTRL, 32, WO, 0x12, "ETM_trace_resource_ctrl", },
+       { ETM_TRACE_EN_CTRL2, 16, WO, 0x12, "ETM_trace_en_ctrl2", },
+       { ETM_TRACE_EN_EVENT, 17, WO, 0x10, "ETM_trace_en_event", },
+       { ETM_TRACE_EN_CTRL1, 26, WO, 0x10, "ETM_trace_en_ctrl1", },
 
        /* ViewData configuration (data trace) */
-       { ETM_VIEWDATA_EVENT, 17, WO, 0x10, "ETM_VIEWDATA_EVENT", },
-       { ETM_VIEWDATA_CTRL1, 32, WO, 0x10, "ETM_VIEWDATA_CTRL1", },
-       { ETM_VIEWDATA_CTRL2, 32, WO, 0x10, "ETM_VIEWDATA_CTRL2", },
-       { ETM_VIEWDATA_CTRL3, 17, WO, 0x10, "ETM_VIEWDATA_CTRL3", },
+       { ETM_VIEWDATA_EVENT, 17, WO, 0x10, "ETM_viewdata_event", },
+       { ETM_VIEWDATA_CTRL1, 32, WO, 0x10, "ETM_viewdata_ctrl1", },
+       { ETM_VIEWDATA_CTRL2, 32, WO, 0x10, "ETM_viewdata_ctrl2", },
+       { ETM_VIEWDATA_CTRL3, 17, WO, 0x10, "ETM_viewdata_ctrl3", },
 
        /* REVISIT exclude VIEWDATA_CTRL2 when it's not there */
 
-       { 0x78, 12, WO, 0x20, "ETM_SYNC_FREQ", },
-       { 0x79, 32, RO, 0x20, "ETM_ID", },
+       { 0x78, 12, WO, 0x20, "ETM_sync_freq", },
+       { 0x7a, 22, RO, 0x31, "ETM_config_code_ext", },
+       { 0x7b, 32, WO, 0x31, "ETM_ext_input_select", },
+       { 0x7c, 32, WO, 0x34, "ETM_trace_start_stop", },
+       { 0x7d, 8, WO, 0x34, "ETM_behavior_control", },
 };
 
 static const struct etm_reg_info etm_fifofull[] = {
        /* FIFOFULL configuration */
-       { ETM_FIFOFULL_REGION, 25, WO, 0x10, "ETM_FIFOFULL_REGION", },
-       { ETM_FIFOFULL_LEVEL,  8, WO, 0x10, "ETM_FIFOFULL_LEVEL", },
+       { ETM_FIFOFULL_REGION, 25, WO, 0x10, "ETM_fifofull_region", },
+       { ETM_FIFOFULL_LEVEL,  8, WO, 0x10, "ETM_fifofull_level", },
 };
 
 static const struct etm_reg_info etm_addr_comp[] = {
        /* Address comparator register pairs */
 #define ADDR_COMPARATOR(i) \
-               { ETM_ADDR_COMPARATOR_VALUE + (i), 32, WO, 0x10, \
-                               "ETM_ADDR_COMPARATOR_VALUE" #i, }, \
-               { ETM_ADDR_ACCESS_TYPE + (i),  7, WO, 0x10, \
-                               "ETM_ADDR_ACCESS_TYPE" #i, }
-       ADDR_COMPARATOR(0),
+               { ETM_ADDR_COMPARATOR_VALUE + (i) - 1, 32, WO, 0x10, \
+                               "ETM_addr_" #i "_comparator_value", }, \
+               { ETM_ADDR_ACCESS_TYPE + (i) - 1,  7, WO, 0x10, \
+                               "ETM_addr_" #i "_access_type", }
        ADDR_COMPARATOR(1),
        ADDR_COMPARATOR(2),
        ADDR_COMPARATOR(3),
@@ -123,8 +129,8 @@ static const struct etm_reg_info etm_addr_comp[] = {
        ADDR_COMPARATOR(5),
        ADDR_COMPARATOR(6),
        ADDR_COMPARATOR(7),
-
        ADDR_COMPARATOR(8),
+
        ADDR_COMPARATOR(9),
        ADDR_COMPARATOR(10),
        ADDR_COMPARATOR(11),
@@ -132,17 +138,17 @@ static const struct etm_reg_info etm_addr_comp[] = {
        ADDR_COMPARATOR(13),
        ADDR_COMPARATOR(14),
        ADDR_COMPARATOR(15),
+       ADDR_COMPARATOR(16),
 #undef ADDR_COMPARATOR
 };
 
 static const struct etm_reg_info etm_data_comp[] = {
        /* Data Value Comparators (NOTE: odd addresses are reserved) */
 #define DATA_COMPARATOR(i) \
-               { ETM_DATA_COMPARATOR_VALUE + 2*(i), 32, WO, 0x10, \
-                               "ETM_DATA_COMPARATOR_VALUE" #i, }, \
-               { ETM_DATA_COMPARATOR_MASK + 2*(i), 32, WO, 0x10, \
-                               "ETM_DATA_COMPARATOR_MASK" #i, }
-       DATA_COMPARATOR(0),
+               { ETM_DATA_COMPARATOR_VALUE + 2*(i) - 1, 32, WO, 0x10, \
+                               "ETM_data_" #i "_comparator_value", }, \
+               { ETM_DATA_COMPARATOR_MASK + 2*(i) - 1, 32, WO, 0x10, \
+                               "ETM_data_" #i "_comparator_mask", }
        DATA_COMPARATOR(1),
        DATA_COMPARATOR(2),
        DATA_COMPARATOR(3),
@@ -150,61 +156,62 @@ static const struct etm_reg_info etm_data_comp[] = {
        DATA_COMPARATOR(5),
        DATA_COMPARATOR(6),
        DATA_COMPARATOR(7),
+       DATA_COMPARATOR(8),
 #undef DATA_COMPARATOR
 };
 
 static const struct etm_reg_info etm_counters[] = {
-#define COUNTER(i) \
-               { ETM_COUNTER_RELOAD_VALUE + (i), 16, WO, 0x10, \
-                               "ETM_COUNTER_RELOAD_VALUE" #i, }, \
-               { ETM_COUNTER_ENABLE + (i), 18, WO, 0x10, \
-                               "ETM_COUNTER_ENABLE" #i, }, \
-               { ETM_COUNTER_RELOAD_EVENT + (i), 17, WO, 0x10, \
-                               "ETM_COUNTER_RELOAD_EVENT" #i, }, \
-               { ETM_COUNTER_VALUE + (i), 16, RO, 0x10, \
-                               "ETM_COUNTER_VALUE" #i, }
-       COUNTER(0),
-       COUNTER(1),
-       COUNTER(2),
-       COUNTER(3),
-#undef COUNTER
+#define ETM_COUNTER(i) \
+               { ETM_COUNTER_RELOAD_VALUE + (i) - 1, 16, WO, 0x10, \
+                               "ETM_counter_" #i "_reload_value", }, \
+               { ETM_COUNTER_ENABLE + (i) - 1, 18, WO, 0x10, \
+                               "ETM_counter_" #i "_enable", }, \
+               { ETM_COUNTER_RELOAD_EVENT + (i) - 1, 17, WO, 0x10, \
+                               "ETM_counter_" #i "_reload_event", }, \
+               { ETM_COUNTER_VALUE + (i) - 1, 16, RO, 0x10, \
+                               "ETM_counter_" #i "_value", }
+       ETM_COUNTER(1),
+       ETM_COUNTER(2),
+       ETM_COUNTER(3),
+       ETM_COUNTER(4),
+#undef ETM_COUNTER
 };
 
 static const struct etm_reg_info etm_sequencer[] = {
-#define SEQ(i) \
+#define ETM_SEQ(i) \
                { ETM_SEQUENCER_EVENT + (i), 17, WO, 0x10, \
-                               "ETM_SEQUENCER_EVENT" #i, }
-       SEQ(0),                         /* 1->2 */
-       SEQ(1),                         /* 2->1 */
-       SEQ(2),                         /* 2->3 */
-       SEQ(3),                         /* 3->1 */
-       SEQ(4),                         /* 3->2 */
-       SEQ(5),                         /* 1->3 */
-#undef SEQ
+                               "ETM_sequencer_event" #i, }
+       ETM_SEQ(0),                             /* 1->2 */
+       ETM_SEQ(1),                             /* 2->1 */
+       ETM_SEQ(2),                             /* 2->3 */
+       ETM_SEQ(3),                             /* 3->1 */
+       ETM_SEQ(4),                             /* 3->2 */
+       ETM_SEQ(5),                             /* 1->3 */
+#undef ETM_SEQ
        /* 0x66 reserved */
-       { ETM_SEQUENCER_STATE,  2, RO, 0x10, "ETM_SEQUENCER_STATE", },
+       { ETM_SEQUENCER_STATE,  2, RO, 0x10, "ETM_sequencer_state", },
 };
 
 static const struct etm_reg_info etm_outputs[] = {
-#define OUT(i) \
-               { ETM_EXTERNAL_OUTPUT + (i), 17, WO, 0x10, \
-                               "ETM_EXTERNAL_OUTPUT" #i, }
-
-       OUT(0),
-       OUT(1),
-       OUT(2),
-       OUT(3),
-#undef OUT
+#define ETM_OUTPUT(i) \
+               { ETM_EXTERNAL_OUTPUT + (i) - 1, 17, WO, 0x10, \
+                               "ETM_external_output" #i, }
+
+       ETM_OUTPUT(1),
+       ETM_OUTPUT(2),
+       ETM_OUTPUT(3),
+       ETM_OUTPUT(4),
+#undef ETM_OUTPUT
 };
 
 #if 0
        /* registers from 0x6c..0x7f were added after ETMv1.3 */
 
        /* Context ID Comparators */
-       { 0x6c, 32, RO, 0x20, "ETM_CONTEXTID_COMPARATOR_VALUE1", }
-       { 0x6d, 32, RO, 0x20, "ETM_CONTEXTID_COMPARATOR_VALUE1", }
-       { 0x6e, 32, RO, 0x20, "ETM_CONTEXTID_COMPARATOR_VALUE1", }
-       { 0x6f, 32, RO, 0x20, "ETM_CONTEXTID_COMPARATOR_MASK", }
+       { 0x6c, 32, RO, 0x20, "ETM_contextid_comparator_value1", }
+       { 0x6d, 32, RO, 0x20, "ETM_contextid_comparator_value2", }
+       { 0x6e, 32, RO, 0x20, "ETM_contextid_comparator_value3", }
+       { 0x6f, 32, RO, 0x20, "ETM_contextid_comparator_mask", }
 #endif
 
 static int etm_reg_arch_type = -1;
@@ -310,10 +317,19 @@ reg_cache_t *etm_build_reg_cache(target_t *target,
                bcd_vers = 0x20;
                LOG_WARNING("ETMv2+ support is incomplete");
 
-               /* REVISIT read ID register, distinguish ETMv3.3 etc;
+               /* REVISIT more registers may exist; they may now be
+                * readable; more register bits have defined meanings;
                 * don't presume trace start/stop support is present;
                 * and include any context ID comparator registers.
                 */
+               etm_reg_add(0x20, jtag_info, reg_cache, arch_info,
+                               etm_core + 1, 1);
+               etm_get_reg(reg_list + 1);
+               etm_ctx->id = buf_get_u32(
+                               (void *)&arch_info[1].value, 0, 32);
+               LOG_DEBUG("ETM ID: %08x", (unsigned) etm_ctx->id);
+               bcd_vers = 0x10 + (((etm_ctx->id) >> 4) & 0xff);
+
        } else {
                switch (config >> 28) {
                case 7:
@@ -343,7 +359,7 @@ reg_cache_t *etm_build_reg_cache(target_t *target,
        LOG_INFO("ETM v%d.%d", bcd_vers >> 4, bcd_vers & 0xf);
 
        etm_reg_add(bcd_vers, jtag_info, reg_cache, arch_info,
-                       etm_core + 1, ARRAY_SIZE(etm_core) - 1);
+                       etm_basic, ARRAY_SIZE(etm_basic));
 
        /* address and data comparators; counters; outputs */
        etm_reg_add(bcd_vers, jtag_info, reg_cache, arch_info,
@@ -391,7 +407,7 @@ reg_cache_t *etm_build_reg_cache(target_t *target,
                etb->reg_cache = reg_cache->next;
        }
 
-
+       etm_ctx->reg_cache = reg_cache;
        return reg_cache;
 }
 
@@ -409,9 +425,8 @@ int etm_setup(target_t *target)
 {
        int retval;
        uint32_t etm_ctrl_value;
-       armv4_5_common_t *armv4_5 = target->arch_info;
-       arm7_9_common_t *arm7_9 = armv4_5->arch_info;
-       etm_context_t *etm_ctx = arm7_9->etm_ctx;
+       struct arm *arm = target_to_arm(target);
+       etm_context_t *etm_ctx = arm->etm;
        reg_t *etm_ctrl_reg;
 
        etm_ctrl_reg = etm_reg_lookup(etm_ctx, ETM_CTRL);
@@ -425,9 +440,13 @@ int etm_setup(target_t *target)
        /* clear the ETM powerdown bit (0) */
        etm_ctrl_value &= ~0x1;
 
-       /* configure port width (6:4), mode (17:16) and clocking (13) */
-       etm_ctrl_value = (etm_ctrl_value &
-               ~ETM_PORT_WIDTH_MASK & ~ETM_PORT_MODE_MASK & ~ETM_PORT_CLOCK_MASK)
+       /* configure port width (21,6:4), mode (13,17:16) and
+        * for older modules clocking (13)
+        */
+       etm_ctrl_value = (etm_ctrl_value
+                       & ~ETM_PORT_WIDTH_MASK
+                       & ~ETM_PORT_MODE_MASK
+                       & ~ETM_PORT_CLOCK_MASK)
                | etm_ctx->portmode;
 
        buf_set_u32(etm_ctrl_reg->value, 0, etm_ctrl_reg->size, etm_ctrl_value);
@@ -436,6 +455,10 @@ int etm_setup(target_t *target)
        if ((retval = jtag_execute_queue()) != ERROR_OK)
                return retval;
 
+       /* REVISIT for ETMv3.0 and later, read ETM_sys_config to
+        * verify that those width and mode settings are OK ...
+        */
+
        if ((retval = etm_ctx->capture_driver->init(etm_ctx)) != ERROR_OK)
        {
                LOG_ERROR("ETM capture driver initialization failed");
@@ -670,12 +693,12 @@ static int etm_read_instruction(etm_context_t *ctx, arm_instruction_t *instructi
        else if (ctx->core_state == ARMV4_5_STATE_JAZELLE)
        {
                LOG_ERROR("BUG: tracing of jazelle code not supported");
-               exit(-1);
+               return ERROR_FAIL;
        }
        else
        {
                LOG_ERROR("BUG: unknown core state encountered");
-               exit(-1);
+               return ERROR_FAIL;
        }
 
        return ERROR_OK;
@@ -976,8 +999,7 @@ static int etmv1_analyze_trace(etm_context_t *ctx, struct command_context_s *cmd
                                        break;
                                default:        /* reserved */
                                        LOG_ERROR("BUG: branch reason code 0x%" PRIx32 " is reserved", ctx->last_branch_reason);
-                                       exit(-1);
-                                       break;
+                                       return ERROR_FAIL;
                        }
 
                        /* if we got here the branch was a normal PC change
@@ -1154,106 +1176,116 @@ static int etmv1_analyze_trace(etm_context_t *ctx, struct command_context_s *cmd
        return ERROR_OK;
 }
 
-static int handle_etm_tracemode_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc)
+static int handle_etm_tracemode_command_update(
+               struct command_context_s *cmd_ctx,
+               char **args, etmv1_tracemode_t *mode)
 {
-       target_t *target;
-       armv4_5_common_t *armv4_5;
-       arm7_9_common_t *arm7_9;
        etmv1_tracemode_t tracemode;
 
-       target = get_current_target(cmd_ctx);
+       /* what parts of data access are traced? */
+       if (strcmp(args[0], "none") == 0)
+               tracemode = ETMV1_TRACE_NONE;
+       else if (strcmp(args[0], "data") == 0)
+               tracemode = ETMV1_TRACE_DATA;
+       else if (strcmp(args[0], "address") == 0)
+               tracemode = ETMV1_TRACE_ADDR;
+       else if (strcmp(args[0], "all") == 0)
+               tracemode = ETMV1_TRACE_DATA | ETMV1_TRACE_ADDR;
+       else
+       {
+               command_print(cmd_ctx, "invalid option '%s'", args[0]);
+               return ERROR_INVALID_ARGUMENTS;
+       }
 
-       if (arm7_9_get_arch_pointers(target, &armv4_5, &arm7_9) != ERROR_OK)
+       uint8_t context_id;
+       COMMAND_PARSE_NUMBER(u8, args[1], context_id);
+       switch (context_id)
+       {
+       case 0:
+               tracemode |= ETMV1_CONTEXTID_NONE;
+               break;
+       case 8:
+               tracemode |= ETMV1_CONTEXTID_8;
+               break;
+       case 16:
+               tracemode |= ETMV1_CONTEXTID_16;
+               break;
+       case 32:
+               tracemode |= ETMV1_CONTEXTID_32;
+               break;
+       default:
+               command_print(cmd_ctx, "invalid option '%s'", args[1]);
+               return ERROR_INVALID_ARGUMENTS;
+       }
+
+       if (strcmp(args[2], "enable") == 0)
+               tracemode |= ETMV1_CYCLE_ACCURATE;
+       else if (strcmp(args[2], "disable") == 0)
+               tracemode |= 0;
+       else
        {
-               command_print(cmd_ctx, "current target isn't an ARM7/ARM9 target");
-               return ERROR_OK;
+               command_print(cmd_ctx, "invalid option '%s'", args[2]);
+               return ERROR_INVALID_ARGUMENTS;
        }
 
-       if (!arm7_9->etm_ctx)
+       if (strcmp(args[3], "enable") == 0)
+               tracemode |= ETMV1_BRANCH_OUTPUT;
+       else if (strcmp(args[3], "disable") == 0)
+               tracemode |= 0;
+       else
        {
-               command_print(cmd_ctx, "current target doesn't have an ETM configured");
-               return ERROR_OK;
+               command_print(cmd_ctx, "invalid option '%s'", args[3]);
+               return ERROR_INVALID_ARGUMENTS;
        }
 
-       tracemode = arm7_9->etm_ctx->tracemode;
+       /* IGNORED:
+        *  - CPRT tracing (coprocessor register transfers)
+        *  - debug request (causes debug entry on trigger)
+        *  - stall on FIFOFULL (preventing tracedata lossage)
+        */
+       *mode = tracemode;
 
-       if (argc == 4)
-       {
-               if (strcmp(args[0], "none") == 0)
-               {
-                       tracemode = ETMV1_TRACE_NONE;
-               }
-               else if (strcmp(args[0], "data") == 0)
-               {
-                       tracemode = ETMV1_TRACE_DATA;
-               }
-               else if (strcmp(args[0], "address") == 0)
-               {
-                       tracemode = ETMV1_TRACE_ADDR;
-               }
-               else if (strcmp(args[0], "all") == 0)
-               {
-                       tracemode = ETMV1_TRACE_DATA | ETMV1_TRACE_ADDR;
-               }
-               else
-               {
-                       command_print(cmd_ctx, "invalid option '%s'", args[0]);
-                       return ERROR_OK;
-               }
+       return ERROR_OK;
+}
 
-               switch (strtol(args[1], NULL, 0))
-               {
-                       case 0:
-                               tracemode |= ETMV1_CONTEXTID_NONE;
-                               break;
-                       case 8:
-                               tracemode |= ETMV1_CONTEXTID_8;
-                               break;
-                       case 16:
-                               tracemode |= ETMV1_CONTEXTID_16;
-                               break;
-                       case 32:
-                               tracemode |= ETMV1_CONTEXTID_32;
-                               break;
-                       default:
-                               command_print(cmd_ctx, "invalid option '%s'", args[1]);
-                               return ERROR_OK;
-               }
+COMMAND_HANDLER(handle_etm_tracemode_command)
+{
+       target_t *target = get_current_target(cmd_ctx);
+       struct arm *arm = target_to_arm(target);
+       struct etm *etm;
 
-               if (strcmp(args[2], "enable") == 0)
-               {
-                       tracemode |= ETMV1_CYCLE_ACCURATE;
-               }
-               else if (strcmp(args[2], "disable") == 0)
-               {
-                       tracemode |= 0;
-               }
-               else
-               {
-                       command_print(cmd_ctx, "invalid option '%s'", args[2]);
-                       return ERROR_OK;
-               }
+       if (!is_arm(arm)) {
+               command_print(cmd_ctx, "ETM: current target isn't an ARM");
+               return ERROR_FAIL;
+       }
 
-               if (strcmp(args[3], "enable") == 0)
-               {
-                       tracemode |= ETMV1_BRANCH_OUTPUT;
-               }
-               else if (strcmp(args[3], "disable") == 0)
-               {
-                       tracemode |= 0;
-               }
-               else
-               {
-                       command_print(cmd_ctx, "invalid option '%s'", args[2]);
-                       return ERROR_OK;
-               }
+       etm = arm->etm;
+       if (!etm) {
+               command_print(cmd_ctx, "current target doesn't have an ETM configured");
+               return ERROR_FAIL;
        }
-       else if (argc != 0)
+
+       etmv1_tracemode_t tracemode = etm->tracemode;
+
+       switch (argc)
        {
-               command_print(cmd_ctx, "usage: configure trace mode <none | data | address | all> <context id bits> <cycle accurate> <branch output>");
-               return ERROR_OK;
+       case 0:
+               break;
+       case 4:
+               handle_etm_tracemode_command_update(cmd_ctx, args, &tracemode);
+               break;
+       default:
+               command_print(cmd_ctx, "usage: configure trace mode "
+                               "<none | data | address | all> "
+                               "<context id bits> <cycle accurate> <branch output>");
+               return ERROR_FAIL;
        }
 
+       /**
+        * todo: fail if parameters were invalid for this hardware,
+        * or couldn't be written; display actual hardware state...
+        */
+
        command_print(cmd_ctx, "current tracemode configuration:");
 
        switch (tracemode & ETMV1_TRACE_MASK)
@@ -1307,13 +1339,13 @@ static int handle_etm_tracemode_command(struct command_context_s *cmd_ctx, char
        }
 
        /* only update ETM_CTRL register if tracemode changed */
-       if (arm7_9->etm_ctx->tracemode != tracemode)
+       if (etm->tracemode != tracemode)
        {
                reg_t *etm_ctrl_reg;
 
-               etm_ctrl_reg = etm_reg_lookup(arm7_9->etm_ctx, ETM_CTRL);
+               etm_ctrl_reg = etm_reg_lookup(etm, ETM_CTRL);
                if (!etm_ctrl_reg)
-                       return ERROR_OK;
+                       return ERROR_FAIL;
 
                etm_get_reg(etm_ctrl_reg);
 
@@ -1323,53 +1355,63 @@ static int handle_etm_tracemode_command(struct command_context_s *cmd_ctx, char
                buf_set_u32(etm_ctrl_reg->value, 8, 1, (tracemode & ETMV1_BRANCH_OUTPUT) >> 9);
                etm_store_reg(etm_ctrl_reg);
 
-               arm7_9->etm_ctx->tracemode = tracemode;
+               etm->tracemode = tracemode;
 
                /* invalidate old trace data */
-               arm7_9->etm_ctx->capture_status = TRACE_IDLE;
-               if (arm7_9->etm_ctx->trace_depth > 0)
+               etm->capture_status = TRACE_IDLE;
+               if (etm->trace_depth > 0)
                {
-                       free(arm7_9->etm_ctx->trace_data);
-                       arm7_9->etm_ctx->trace_data = NULL;
+                       free(etm->trace_data);
+                       etm->trace_data = NULL;
                }
-               arm7_9->etm_ctx->trace_depth = 0;
+               etm->trace_depth = 0;
        }
 
        return ERROR_OK;
 }
 
-static int handle_etm_config_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc)
+COMMAND_HANDLER(handle_etm_config_command)
 {
        target_t *target;
-       armv4_5_common_t *armv4_5;
-       arm7_9_common_t *arm7_9;
+       struct arm *arm;
        etm_portmode_t portmode = 0x0;
-       etm_context_t *etm_ctx = malloc(sizeof(etm_context_t));
+       struct etm *etm_ctx;
        int i;
 
        if (argc != 5)
-       {
-               free(etm_ctx);
                return ERROR_COMMAND_SYNTAX_ERROR;
-       }
 
        target = get_target(args[0]);
        if (!target)
        {
                LOG_ERROR("target '%s' not defined", args[0]);
-               free(etm_ctx);
                return ERROR_FAIL;
        }
 
-       if (arm7_9_get_arch_pointers(target, &armv4_5, &arm7_9) != ERROR_OK)
-       {
-               command_print(cmd_ctx, "current target isn't an ARM7/ARM9 target");
-               free(etm_ctx);
+       arm = target_to_arm(target);
+       if (!is_arm(arm)) {
+               command_print(cmd_ctx, "target '%s' is '%s'; not an ARM",
+                               target->cmd_name, target_get_name(target));
                return ERROR_FAIL;
        }
 
-       switch (strtoul(args[1], NULL, 0))
+       /* FIXME for ETMv3.0 and above -- and we don't yet know what ETM
+        * version we'll be using!! -- so we can't know how to validate
+        * params yet.  "etm config" should likely be *AFTER* hookup...
+        *
+        *  - Many more widths might be supported ... and we can easily
+        *    check whether our setting "took".
+        *
+        *  - The "clock" and "mode" bits are interpreted differently.
+        *    See ARM IHI 0014O table 2-17 for the old behavior, and
+        *    table 2-18 for the new.  With ETB it's best to specify
+        *    "normal full" ...
+        */
+       uint8_t port_width;
+       COMMAND_PARSE_NUMBER(u8, args[1], port_width);
+       switch (port_width)
        {
+               /* before ETMv3.0 */
                case 4:
                        portmode |= ETM_PORT_4BIT;
                        break;
@@ -1379,9 +1421,28 @@ static int handle_etm_config_command(struct command_context_s *cmd_ctx, char *cm
                case 16:
                        portmode |= ETM_PORT_16BIT;
                        break;
+               /* ETMv3.0 and later*/
+               case 24:
+                       portmode |= ETM_PORT_24BIT;
+                       break;
+               case 32:
+                       portmode |= ETM_PORT_32BIT;
+                       break;
+               case 48:
+                       portmode |= ETM_PORT_48BIT;
+                       break;
+               case 64:
+                       portmode |= ETM_PORT_64BIT;
+                       break;
+               case 1:
+                       portmode |= ETM_PORT_1BIT;
+                       break;
+               case 2:
+                       portmode |= ETM_PORT_2BIT;
+                       break;
                default:
-                       command_print(cmd_ctx, "unsupported ETM port width '%s', must be 4, 8 or 16", args[1]);
-                       free(etm_ctx);
+                       command_print(cmd_ctx,
+                               "unsupported ETM port width '%s'", args[1]);
                        return ERROR_FAIL;
        }
 
@@ -1400,7 +1461,6 @@ static int handle_etm_config_command(struct command_context_s *cmd_ctx, char *cm
        else
        {
                command_print(cmd_ctx, "unsupported ETM port mode '%s', must be 'normal', 'multiplexed' or 'demultiplexed'", args[2]);
-               free(etm_ctx);
                return ERROR_FAIL;
        }
 
@@ -1415,7 +1475,12 @@ static int handle_etm_config_command(struct command_context_s *cmd_ctx, char *cm
        else
        {
                command_print(cmd_ctx, "unsupported ETM port clocking '%s', must be 'full' or 'half'", args[3]);
-               free(etm_ctx);
+               return ERROR_FAIL;
+       }
+
+       etm_ctx = calloc(1, sizeof(etm_context_t));
+       if (!etm_ctx) {
+               LOG_DEBUG("out of memory");
                return ERROR_FAIL;
        }
 
@@ -1447,78 +1512,67 @@ static int handle_etm_config_command(struct command_context_s *cmd_ctx, char *cm
        etm_ctx->target = target;
        etm_ctx->trigger_percent = 50;
        etm_ctx->trace_data = NULL;
-       etm_ctx->trace_depth = 0;
        etm_ctx->portmode = portmode;
-       etm_ctx->tracemode = 0x0;
        etm_ctx->core_state = ARMV4_5_STATE_ARM;
-       etm_ctx->image = NULL;
-       etm_ctx->pipe_index = 0;
-       etm_ctx->data_index = 0;
-       etm_ctx->current_pc = 0x0;
-       etm_ctx->pc_ok = 0;
-       etm_ctx->last_branch = 0x0;
-       etm_ctx->last_branch_reason = 0x0;
-       etm_ctx->last_ptr = 0x0;
-       etm_ctx->ptr_ok = 0x0;
-       etm_ctx->last_instruction = 0;
-
-       arm7_9->etm_ctx = etm_ctx;
+
+       arm->etm = etm_ctx;
 
        return etm_register_user_commands(cmd_ctx);
 }
 
-static int handle_etm_info_command(struct command_context_s *cmd_ctx,
-               char *cmd, char **args, int argc)
+COMMAND_HANDLER(handle_etm_info_command)
 {
        target_t *target;
-       armv4_5_common_t *armv4_5;
-       arm7_9_common_t *arm7_9;
+       struct arm *arm;
        etm_context_t *etm;
        reg_t *etm_sys_config_reg;
-
        int max_port_size;
+       uint32_t config;
 
        target = get_current_target(cmd_ctx);
-
-       if (arm7_9_get_arch_pointers(target, &armv4_5, &arm7_9) != ERROR_OK)
+       arm = target_to_arm(target);
+       if (!is_arm(arm))
        {
-               command_print(cmd_ctx, "current target isn't an ARM7/ARM9 target");
-               return ERROR_OK;
+               command_print(cmd_ctx, "ETM: current target isn't an ARM");
+               return ERROR_FAIL;
        }
 
-       etm = arm7_9->etm_ctx;
+       etm = arm->etm;
        if (!etm)
        {
                command_print(cmd_ctx, "current target doesn't have an ETM configured");
-               return ERROR_OK;
+               return ERROR_FAIL;
        }
 
        command_print(cmd_ctx, "ETM v%d.%d",
                        etm->bcd_vers >> 4, etm->bcd_vers & 0xf);
        command_print(cmd_ctx, "pairs of address comparators: %i",
-                       (etm->config >> 0) & 0x0f);
+                       (int) (etm->config >> 0) & 0x0f);
        command_print(cmd_ctx, "data comparators: %i",
-                       (etm->config >> 4) & 0x0f);
+                       (int) (etm->config >> 4) & 0x0f);
        command_print(cmd_ctx, "memory map decoders: %i",
-                       (etm->config >> 8) & 0x1f);
+                       (int) (etm->config >> 8) & 0x1f);
        command_print(cmd_ctx, "number of counters: %i",
-                       (etm->config >> 13) & 0x07);
+                       (int) (etm->config >> 13) & 0x07);
        command_print(cmd_ctx, "sequencer %spresent",
-                       (etm->config & (1 << 16)) ? "" : "not ");
+                       (int) (etm->config & (1 << 16)) ? "" : "not ");
        command_print(cmd_ctx, "number of ext. inputs: %i",
-                       (etm->config >> 17) & 0x07);
+                       (int) (etm->config >> 17) & 0x07);
        command_print(cmd_ctx, "number of ext. outputs: %i",
-                       (etm->config >> 20) & 0x07);
+                       (int) (etm->config >> 20) & 0x07);
        command_print(cmd_ctx, "FIFO full %spresent",
-                       (etm->config & (1 << 23)) ? "" : "not ");
+                       (int) (etm->config & (1 << 23)) ? "" : "not ");
        if (etm->bcd_vers < 0x20)
                command_print(cmd_ctx, "protocol version: %i",
-                               (etm->config >> 28) & 0x07);
+                               (int) (etm->config >> 28) & 0x07);
        else {
+               command_print(cmd_ctx,
+                               "coprocessor and memory access %ssupported",
+                               (etm->config & (1 << 26)) ? "" : "not ");
                command_print(cmd_ctx, "trace start/stop %spresent",
                                (etm->config & (1 << 26)) ? "" : "not ");
                command_print(cmd_ctx, "number of context comparators: %i",
-                               (etm->config >> 24) & 0x03);
+                               (int) (etm->config >> 24) & 0x03);
        }
 
        /* SYS_CONFIG isn't present before ETMv1.2 */
@@ -1527,9 +1581,16 @@ static int handle_etm_info_command(struct command_context_s *cmd_ctx,
                return ERROR_OK;
 
        etm_get_reg(etm_sys_config_reg);
+       config = buf_get_u32(etm_sys_config_reg->value, 0, 32);
+
+       LOG_DEBUG("ETM SYS CONFIG %08x", (unsigned) config);
 
-       switch (buf_get_u32(etm_sys_config_reg->value, 0, 3))
+       max_port_size = config & 0x7;
+       if (etm->bcd_vers >= 0x30)
+               max_port_size |= (config >> 6) & 0x08;
+       switch (max_port_size)
        {
+               /* before ETMv3.0 */
                case 0:
                        max_port_size = 4;
                        break;
@@ -1539,101 +1600,159 @@ static int handle_etm_info_command(struct command_context_s *cmd_ctx,
                case 2:
                        max_port_size = 16;
                        break;
+               /* ETMv3.0 and later*/
+               case 3:
+                       max_port_size = 24;
+                       break;
+               case 4:
+                       max_port_size = 32;
+                       break;
+               case 5:
+                       max_port_size = 48;
+                       break;
+               case 6:
+                       max_port_size = 64;
+                       break;
+               case 8:
+                       max_port_size = 1;
+                       break;
+               case 9:
+                       max_port_size = 2;
+                       break;
                default:
                        LOG_ERROR("Illegal max_port_size");
-                       exit(-1);
+                       return ERROR_FAIL;
        }
        command_print(cmd_ctx, "max. port size: %i", max_port_size);
 
-       command_print(cmd_ctx, "half-rate clocking %ssupported",
-                       (buf_get_u32(etm_sys_config_reg->value, 3, 1) == 1) ? "" : "not ");
-       command_print(cmd_ctx, "full-rate clocking %ssupported",
-                       (buf_get_u32(etm_sys_config_reg->value, 4, 1) == 1) ? "" : "not ");
-       command_print(cmd_ctx, "normal trace format %ssupported",
-                       (buf_get_u32(etm_sys_config_reg->value, 5, 1) == 1) ? "" : "not ");
-       command_print(cmd_ctx, "multiplex trace format %ssupported",
-                       (buf_get_u32(etm_sys_config_reg->value, 6, 1) == 1) ? "" : "not ");
-       command_print(cmd_ctx, "demultiplex trace format %ssupported",
-                       (buf_get_u32(etm_sys_config_reg->value, 7, 1) == 1) ? "" : "not ");
+       if (etm->bcd_vers < 0x30) {
+               command_print(cmd_ctx, "half-rate clocking %ssupported",
+                               (config & (1 << 3)) ? "" : "not ");
+               command_print(cmd_ctx, "full-rate clocking %ssupported",
+                               (config & (1 << 4)) ? "" : "not ");
+               command_print(cmd_ctx, "normal trace format %ssupported",
+                               (config & (1 << 5)) ? "" : "not ");
+               command_print(cmd_ctx, "multiplex trace format %ssupported",
+                               (config & (1 << 6)) ? "" : "not ");
+               command_print(cmd_ctx, "demultiplex trace format %ssupported",
+                               (config & (1 << 7)) ? "" : "not ");
+       } else {
+               /* REVISIT show which size and format are selected ... */
+               command_print(cmd_ctx, "current port size %ssupported",
+                               (config & (1 << 10)) ? "" : "not ");
+               command_print(cmd_ctx, "current trace format %ssupported",
+                               (config & (1 << 11)) ? "" : "not ");
+       }
+       if (etm->bcd_vers >= 0x21)
+               command_print(cmd_ctx, "fetch comparisons %ssupported",
+                               (config & (1 << 17)) ? "not " : "");
        command_print(cmd_ctx, "FIFO full %ssupported",
-                       (buf_get_u32(etm_sys_config_reg->value, 8, 1) == 1) ? "" : "not ");
+                       (config & (1 << 8)) ? "" : "not ");
 
        return ERROR_OK;
 }
 
-static int handle_etm_status_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc)
+COMMAND_HANDLER(handle_etm_status_command)
 {
        target_t *target;
-       armv4_5_common_t *armv4_5;
-       arm7_9_common_t *arm7_9;
+       struct arm *arm;
+       etm_context_t *etm;
        trace_status_t trace_status;
 
        target = get_current_target(cmd_ctx);
-
-       if (arm7_9_get_arch_pointers(target, &armv4_5, &arm7_9) != ERROR_OK)
+       arm = target_to_arm(target);
+       if (!is_arm(arm))
        {
-               command_print(cmd_ctx, "current target isn't an ARM7/ARM9 target");
-               return ERROR_OK;
+               command_print(cmd_ctx, "ETM: current target isn't an ARM");
+               return ERROR_FAIL;
        }
 
-       if (!arm7_9->etm_ctx)
+       etm = arm->etm;
+       if (!etm)
        {
                command_print(cmd_ctx, "current target doesn't have an ETM configured");
-               return ERROR_OK;
+               return ERROR_FAIL;
        }
 
-       trace_status = arm7_9->etm_ctx->capture_driver->status(arm7_9->etm_ctx);
+       /* ETM status */
+       if (etm->bcd_vers >= 0x11) {
+               reg_t *reg;
 
+               reg = etm_reg_lookup(etm, ETM_STATUS);
+               if (!reg)
+                       return ERROR_FAIL;
+               if (etm_get_reg(reg) == ERROR_OK) {
+                       unsigned s = buf_get_u32(reg->value, 0, reg->size);
+
+                       command_print(cmd_ctx, "etm: %s%s%s%s",
+                               /* bit(1) == progbit */
+                               (etm->bcd_vers >= 0x12)
+                                       ? ((s & (1 << 1))
+                                               ? "disabled" : "enabled")
+                                       : "?",
+                               ((s & (1 << 3)) && etm->bcd_vers >= 0x31)
+                                       ? " triggered" : "",
+                               ((s & (1 << 2)) && etm->bcd_vers >= 0x12)
+                                       ? " start/stop" : "",
+                               ((s & (1 << 0)) && etm->bcd_vers >= 0x11)
+                                       ? " untraced-overflow" : "");
+               } /* else ignore and try showing trace port status */
+       }
+
+       /* Trace Port Driver status */
+       trace_status = etm->capture_driver->status(etm);
        if (trace_status == TRACE_IDLE)
        {
-               command_print(cmd_ctx, "tracing is idle");
+               command_print(cmd_ctx, "%s: idle", etm->capture_driver->name);
        }
        else
        {
                static char *completed = " completed";
                static char *running = " is running";
-               static char *overflowed = ", trace overflowed";
-               static char *triggered = ", trace triggered";
+               static char *overflowed = ", overflowed";
+               static char *triggered = ", triggered";
 
-               command_print(cmd_ctx, "trace collection%s%s%s",
+               command_print(cmd_ctx, "%s: trace collection%s%s%s",
+                       etm->capture_driver->name,
                        (trace_status & TRACE_RUNNING) ? running : completed,
                        (trace_status & TRACE_OVERFLOWED) ? overflowed : "",
                        (trace_status & TRACE_TRIGGERED) ? triggered : "");
 
-               if (arm7_9->etm_ctx->trace_depth > 0)
+               if (etm->trace_depth > 0)
                {
-                       command_print(cmd_ctx, "%i frames of trace data read", (int)(arm7_9->etm_ctx->trace_depth));
+                       command_print(cmd_ctx, "%i frames of trace data read",
+                                       (int)(etm->trace_depth));
                }
        }
 
        return ERROR_OK;
 }
 
-static int handle_etm_image_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc)
+COMMAND_HANDLER(handle_etm_image_command)
 {
        target_t *target;
-       armv4_5_common_t *armv4_5;
-       arm7_9_common_t *arm7_9;
+       struct arm *arm;
        etm_context_t *etm_ctx;
 
        if (argc < 1)
        {
                command_print(cmd_ctx, "usage: etm image <file> [base address] [type]");
-               return ERROR_OK;
+               return ERROR_FAIL;
        }
 
        target = get_current_target(cmd_ctx);
-
-       if (arm7_9_get_arch_pointers(target, &armv4_5, &arm7_9) != ERROR_OK)
+       arm = target_to_arm(target);
+       if (!is_arm(arm))
        {
-               command_print(cmd_ctx, "current target isn't an ARM7/ARM9 target");
-               return ERROR_OK;
+               command_print(cmd_ctx, "ETM: current target isn't an ARM");
+               return ERROR_FAIL;
        }
 
-       if (!(etm_ctx = arm7_9->etm_ctx))
+       etm_ctx = arm->etm;
+       if (!etm_ctx)
        {
                command_print(cmd_ctx, "current target doesn't have an ETM configured");
-               return ERROR_OK;
+               return ERROR_FAIL;
        }
 
        if (etm_ctx->image)
@@ -1651,7 +1770,7 @@ static int handle_etm_image_command(struct command_context_s *cmd_ctx, char *cmd
        if (argc >= 2)
        {
                etm_ctx->image->base_address_set = 1;
-               etm_ctx->image->base_address = strtoul(args[1], NULL, 0);
+               COMMAND_PARSE_NUMBER(int, args[1], etm_ctx->image->base_address);
        }
        else
        {
@@ -1662,39 +1781,39 @@ static int handle_etm_image_command(struct command_context_s *cmd_ctx, char *cmd
        {
                free(etm_ctx->image);
                etm_ctx->image = NULL;
-               return ERROR_OK;
+               return ERROR_FAIL;
        }
 
        return ERROR_OK;
 }
 
-static int handle_etm_dump_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc)
+COMMAND_HANDLER(handle_etm_dump_command)
 {
        fileio_t file;
        target_t *target;
-       armv4_5_common_t *armv4_5;
-       arm7_9_common_t *arm7_9;
+       struct arm *arm;
        etm_context_t *etm_ctx;
        uint32_t i;
 
        if (argc != 1)
        {
                command_print(cmd_ctx, "usage: etm dump <file>");
-               return ERROR_OK;
+               return ERROR_FAIL;
        }
 
        target = get_current_target(cmd_ctx);
-
-       if (arm7_9_get_arch_pointers(target, &armv4_5, &arm7_9) != ERROR_OK)
+       arm = target_to_arm(target);
+       if (!is_arm(arm))
        {
-               command_print(cmd_ctx, "current target isn't an ARM7/ARM9 target");
-               return ERROR_OK;
+               command_print(cmd_ctx, "ETM: current target isn't an ARM");
+               return ERROR_FAIL;
        }
 
-       if (!(etm_ctx = arm7_9->etm_ctx))
+       etm_ctx = arm->etm;
+       if (!etm_ctx)
        {
                command_print(cmd_ctx, "current target doesn't have an ETM configured");
-               return ERROR_OK;
+               return ERROR_FAIL;
        }
 
        if (etm_ctx->capture_driver->status == TRACE_IDLE)
@@ -1707,7 +1826,7 @@ static int handle_etm_dump_command(struct command_context_s *cmd_ctx, char *cmd,
        {
                /* TODO: if on-the-fly capture is to be supported, this needs to be changed */
                command_print(cmd_ctx, "trace capture not completed");
-               return ERROR_OK;
+               return ERROR_FAIL;
        }
 
        /* read the trace data if it wasn't read already */
@@ -1716,7 +1835,7 @@ static int handle_etm_dump_command(struct command_context_s *cmd_ctx, char *cmd,
 
        if (fileio_open(&file, args[0], FILEIO_WRITE, FILEIO_BINARY) != ERROR_OK)
        {
-               return ERROR_OK;
+               return ERROR_FAIL;
        }
 
        fileio_write_u32(&file, etm_ctx->capture_status);
@@ -1736,51 +1855,51 @@ static int handle_etm_dump_command(struct command_context_s *cmd_ctx, char *cmd,
        return ERROR_OK;
 }
 
-static int handle_etm_load_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc)
+COMMAND_HANDLER(handle_etm_load_command)
 {
        fileio_t file;
        target_t *target;
-       armv4_5_common_t *armv4_5;
-       arm7_9_common_t *arm7_9;
+       struct arm *arm;
        etm_context_t *etm_ctx;
        uint32_t i;
 
        if (argc != 1)
        {
                command_print(cmd_ctx, "usage: etm load <file>");
-               return ERROR_OK;
+               return ERROR_FAIL;
        }
 
        target = get_current_target(cmd_ctx);
-
-       if (arm7_9_get_arch_pointers(target, &armv4_5, &arm7_9) != ERROR_OK)
+       arm = target_to_arm(target);
+       if (!is_arm(arm))
        {
-               command_print(cmd_ctx, "current target isn't an ARM7/ARM9 target");
-               return ERROR_OK;
+               command_print(cmd_ctx, "ETM: current target isn't an ARM");
+               return ERROR_FAIL;
        }
 
-       if (!(etm_ctx = arm7_9->etm_ctx))
+       etm_ctx = arm->etm;
+       if (!etm_ctx)
        {
                command_print(cmd_ctx, "current target doesn't have an ETM configured");
-               return ERROR_OK;
+               return ERROR_FAIL;
        }
 
        if (etm_ctx->capture_driver->status(etm_ctx) & TRACE_RUNNING)
        {
                command_print(cmd_ctx, "trace capture running, stop first");
-               return ERROR_OK;
+               return ERROR_FAIL;
        }
 
        if (fileio_open(&file, args[0], FILEIO_READ, FILEIO_BINARY) != ERROR_OK)
        {
-               return ERROR_OK;
+               return ERROR_FAIL;
        }
 
        if (file.size % 4)
        {
                command_print(cmd_ctx, "size isn't a multiple of 4, no valid trace data");
                fileio_close(&file);
-               return ERROR_OK;
+               return ERROR_FAIL;
        }
 
        if (etm_ctx->trace_depth > 0)
@@ -1801,7 +1920,7 @@ static int handle_etm_load_command(struct command_context_s *cmd_ctx, char *cmd,
        {
                command_print(cmd_ctx, "not enough memory to perform operation");
                fileio_close(&file);
-               return ERROR_OK;
+               return ERROR_FAIL;
        }
 
        for (i = 0; i < etm_ctx->trace_depth; i++)
@@ -1820,30 +1939,31 @@ static int handle_etm_load_command(struct command_context_s *cmd_ctx, char *cmd,
        return ERROR_OK;
 }
 
-static int handle_etm_trigger_percent_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc)
+COMMAND_HANDLER(handle_etm_trigger_percent_command)
 {
        target_t *target;
-       armv4_5_common_t *armv4_5;
-       arm7_9_common_t *arm7_9;
+       struct arm *arm;
        etm_context_t *etm_ctx;
 
        target = get_current_target(cmd_ctx);
-
-       if (arm7_9_get_arch_pointers(target, &armv4_5, &arm7_9) != ERROR_OK)
+       arm = target_to_arm(target);
+       if (!is_arm(arm))
        {
-               command_print(cmd_ctx, "current target isn't an ARM7/ARM9 target");
-               return ERROR_OK;
+               command_print(cmd_ctx, "ETM: current target isn't an ARM");
+               return ERROR_FAIL;
        }
 
-       if (!(etm_ctx = arm7_9->etm_ctx))
+       etm_ctx = arm->etm;
+       if (!etm_ctx)
        {
                command_print(cmd_ctx, "current target doesn't have an ETM configured");
-               return ERROR_OK;
+               return ERROR_FAIL;
        }
 
        if (argc > 0)
        {
-               uint32_t new_value = strtoul(args[0], NULL, 0);
+               uint32_t new_value;
+               COMMAND_PARSE_NUMBER(u32, args[0], new_value);
 
                if ((new_value < 2) || (new_value > 100))
                {
@@ -1860,40 +1980,40 @@ static int handle_etm_trigger_percent_command(struct command_context_s *cmd_ctx,
        return ERROR_OK;
 }
 
-static int handle_etm_start_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc)
+COMMAND_HANDLER(handle_etm_start_command)
 {
        target_t *target;
-       armv4_5_common_t *armv4_5;
-       arm7_9_common_t *arm7_9;
+       struct arm *arm;
        etm_context_t *etm_ctx;
        reg_t *etm_ctrl_reg;
 
        target = get_current_target(cmd_ctx);
-
-       if (arm7_9_get_arch_pointers(target, &armv4_5, &arm7_9) != ERROR_OK)
+       arm = target_to_arm(target);
+       if (!is_arm(arm))
        {
-               command_print(cmd_ctx, "current target isn't an ARM7/ARM9 target");
-               return ERROR_OK;
+               command_print(cmd_ctx, "ETM: current target isn't an ARM");
+               return ERROR_FAIL;
        }
 
-       if (!(etm_ctx = arm7_9->etm_ctx))
+       etm_ctx = arm->etm;
+       if (!etm_ctx)
        {
                command_print(cmd_ctx, "current target doesn't have an ETM configured");
-               return ERROR_OK;
+               return ERROR_FAIL;
        }
 
        /* invalidate old tracing data */
-       arm7_9->etm_ctx->capture_status = TRACE_IDLE;
-       if (arm7_9->etm_ctx->trace_depth > 0)
+       etm_ctx->capture_status = TRACE_IDLE;
+       if (etm_ctx->trace_depth > 0)
        {
-               free(arm7_9->etm_ctx->trace_data);
-               arm7_9->etm_ctx->trace_data = NULL;
+               free(etm_ctx->trace_data);
+               etm_ctx->trace_data = NULL;
        }
-       arm7_9->etm_ctx->trace_depth = 0;
+       etm_ctx->trace_depth = 0;
 
        etm_ctrl_reg = etm_reg_lookup(etm_ctx, ETM_CTRL);
        if (!etm_ctrl_reg)
-               return ERROR_OK;
+               return ERROR_FAIL;
 
        etm_get_reg(etm_ctrl_reg);
 
@@ -1908,31 +2028,31 @@ static int handle_etm_start_command(struct command_context_s *cmd_ctx, char *cmd
        return ERROR_OK;
 }
 
-static int handle_etm_stop_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc)
+COMMAND_HANDLER(handle_etm_stop_command)
 {
        target_t *target;
-       armv4_5_common_t *armv4_5;
-       arm7_9_common_t *arm7_9;
+       struct arm *arm;
        etm_context_t *etm_ctx;
        reg_t *etm_ctrl_reg;
 
        target = get_current_target(cmd_ctx);
-
-       if (arm7_9_get_arch_pointers(target, &armv4_5, &arm7_9) != ERROR_OK)
+       arm = target_to_arm(target);
+       if (!is_arm(arm))
        {
-               command_print(cmd_ctx, "current target isn't an ARM7/ARM9 target");
-               return ERROR_OK;
+               command_print(cmd_ctx, "ETM: current target isn't an ARM");
+               return ERROR_FAIL;
        }
 
-       if (!(etm_ctx = arm7_9->etm_ctx))
+       etm_ctx = arm->etm;
+       if (!etm_ctx)
        {
                command_print(cmd_ctx, "current target doesn't have an ETM configured");
-               return ERROR_OK;
+               return ERROR_FAIL;
        }
 
        etm_ctrl_reg = etm_reg_lookup(etm_ctx, ETM_CTRL);
        if (!etm_ctrl_reg)
-               return ERROR_OK;
+               return ERROR_FAIL;
 
        etm_get_reg(etm_ctrl_reg);
 
@@ -1947,26 +2067,26 @@ static int handle_etm_stop_command(struct command_context_s *cmd_ctx, char *cmd,
        return ERROR_OK;
 }
 
-static int handle_etm_analyze_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc)
+COMMAND_HANDLER(handle_etm_analyze_command)
 {
        target_t *target;
-       armv4_5_common_t *armv4_5;
-       arm7_9_common_t *arm7_9;
+       struct arm *arm;
        etm_context_t *etm_ctx;
        int retval;
 
        target = get_current_target(cmd_ctx);
-
-       if (arm7_9_get_arch_pointers(target, &armv4_5, &arm7_9) != ERROR_OK)
+       arm = target_to_arm(target);
+       if (!is_arm(arm))
        {
-               command_print(cmd_ctx, "current target isn't an ARM7/ARM9 target");
-               return ERROR_OK;
+               command_print(cmd_ctx, "ETM: current target isn't an ARM");
+               return ERROR_FAIL;
        }
 
-       if (!(etm_ctx = arm7_9->etm_ctx))
+       etm_ctx = arm->etm;
+       if (!etm_ctx)
        {
                command_print(cmd_ctx, "current target doesn't have an ETM configured");
-               return ERROR_OK;
+               return ERROR_FAIL;
        }
 
        if ((retval = etmv1_analyze_trace(etm_ctx, cmd_ctx)) != ERROR_OK)
@@ -1987,7 +2107,7 @@ static int handle_etm_analyze_command(struct command_context_s *cmd_ctx, char *c
                }
        }
 
-       return ERROR_OK;
+       return retval;
 }
 
 int etm_register_commands(struct command_context_s *cmd_ctx)