From 1033633321056d3e20c125e21d48723fc6f8705f Mon Sep 17 00:00:00 2001 From: dbrownell Date: Fri, 2 Oct 2009 09:19:03 +0000 Subject: Minor ETB and ETM bugfixes and doc updates - ETB * report _actual_ hardware status, not just expected status * add a missing diagnostic on a potential ETB setup error * prefix any diagnostics with "ETB" - ETM * make "etm status" show ETM hardware status too, instead of just traceport status (which previously was fake, sigh) - Docs * flesh out "etm tracemode" docs a bit * clarify "etm status" ... previously it was traceport status * explain "etm trigger_percent" as a *traceport* option ETM+ETB tracing still isn't behaving, but now I can see that part of the reason is that the ETB turns itself off almost immediately after being enabled, and before collecting any data. git-svn-id: svn://svn.berlios.de/openocd/trunk@2790 b42882b7-edfa-0310-969c-e2dbd0fdcd60 --- src/target/etb.c | 93 ++++++++++++++++++++++++++++---------------------------- 1 file changed, 46 insertions(+), 47 deletions(-) (limited to 'src/target/etb.c') diff --git a/src/target/etb.c b/src/target/etb.c index 40bb34a1..5b81895d 100644 --- a/src/target/etb.c +++ b/src/target/etb.c @@ -110,13 +110,13 @@ static int etb_get_reg(reg_t *reg) if ((retval = etb_read_reg(reg)) != ERROR_OK) { - LOG_ERROR("BUG: error scheduling etm register read"); + LOG_ERROR("BUG: error scheduling ETB register read"); return retval; } if ((retval = jtag_execute_queue()) != ERROR_OK) { - LOG_ERROR("register read failed"); + LOG_ERROR("ETB register read failed"); return retval; } @@ -288,7 +288,7 @@ static int etb_set_reg(reg_t *reg, uint32_t value) if ((retval = etb_write_reg(reg, value)) != ERROR_OK) { - LOG_ERROR("BUG: error scheduling etm register write"); + LOG_ERROR("BUG: error scheduling ETB register write"); return retval; } @@ -307,7 +307,7 @@ static int etb_set_reg_w_exec(reg_t *reg, uint8_t *buf) if ((retval = jtag_execute_queue()) != ERROR_OK) { - LOG_ERROR("register write failed"); + LOG_ERROR("ETB: register write failed"); return retval; } return ERROR_OK; @@ -378,20 +378,20 @@ static int handle_etb_config_command(struct command_context_s *cmd_ctx, char *cm if (!target) { - LOG_ERROR("target '%s' not defined", args[0]); + LOG_ERROR("ETB: target '%s' not defined", args[0]); 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"); + command_print(cmd_ctx, "ETB: current target isn't an ARM7/ARM9 target"); return ERROR_FAIL; } tap = jtag_tap_by_string(args[1]); if (tap == NULL) { - command_print(cmd_ctx, "Tap: %s does not exist", args[1]); + command_print(cmd_ctx, "ETB: TAP %s does not exist", args[1]); return ERROR_FAIL; } @@ -409,7 +409,7 @@ static int handle_etb_config_command(struct command_context_s *cmd_ctx, char *cm } else { - LOG_ERROR("target has no ETM defined, ETB left unconfigured"); + LOG_ERROR("ETM: target has no ETM defined, ETB left unconfigured"); return ERROR_FAIL; } @@ -436,56 +436,53 @@ static int etb_init(etm_context_t *etm_ctx) static trace_status_t etb_status(etm_context_t *etm_ctx) { etb_t *etb = etm_ctx->capture_driver_priv; + reg_t *control = &etb->reg_cache->reg_list[ETB_CTRL]; + reg_t *status = &etb->reg_cache->reg_list[ETB_STATUS]; + trace_status_t retval = 0; + int etb_timeout = 100; etb->etm_ctx = etm_ctx; - /* if tracing is currently idle, return this information */ - if (etm_ctx->capture_status == TRACE_IDLE) - { - return etm_ctx->capture_status; - } - else if (etm_ctx->capture_status & TRACE_RUNNING) - { - reg_t *etb_status_reg = &etb->reg_cache->reg_list[ETB_STATUS]; - int etb_timeout = 100; + /* read control and status registers */ + etb_read_reg(control); + etb_read_reg(status); + jtag_execute_queue(); - /* trace is running, check the ETB status flags */ - etb_get_reg(etb_status_reg); + /* See if it's (still) active */ + retval = buf_get_u32(control->value, 0, 1) ? TRACE_RUNNING : TRACE_IDLE; - /* check Full bit to identify an overflow */ - if (buf_get_u32(etb_status_reg->value, 0, 1) == 1) - etm_ctx->capture_status |= TRACE_OVERFLOWED; + /* check Full bit to identify wraparound/overflow */ + if (buf_get_u32(status->value, 0, 1) == 1) + retval |= TRACE_OVERFLOWED; - /* check Triggered bit to identify trigger condition */ - if (buf_get_u32(etb_status_reg->value, 1, 1) == 1) - etm_ctx->capture_status |= TRACE_TRIGGERED; + /* check Triggered bit to identify trigger condition */ + if (buf_get_u32(status->value, 1, 1) == 1) + retval |= TRACE_TRIGGERED; - /* check AcqComp to identify trace completion */ - if (buf_get_u32(etb_status_reg->value, 2, 1) == 1) - { - while (etb_timeout-- && (buf_get_u32(etb_status_reg->value, 3, 1) == 0)) - { - /* wait for data formatter idle */ - etb_get_reg(etb_status_reg); - } + /* check AcqComp to see if trigger counter dropped to zero */ + if (buf_get_u32(status->value, 2, 1) == 1) { + /* wait for DFEmpty */ + while (etb_timeout-- && buf_get_u32(status->value, 3, 1) == 0) + etb_get_reg(status); - if (etb_timeout == 0) - { - LOG_ERROR("AcqComp set but DFEmpty won't go high, ETB status: 0x%" PRIx32 "", - buf_get_u32(etb_status_reg->value, 0, etb_status_reg->size)); - } + if (etb_timeout == 0) + LOG_ERROR("ETB: DFEmpty won't go high, status 0x%02x", + (unsigned) buf_get_u32(status->value, 0, 4)); - if (!(etm_ctx->capture_status && TRACE_TRIGGERED)) - { - LOG_ERROR("trace completed, but no trigger condition detected"); - } + if (!(etm_ctx->capture_status & TRACE_TRIGGERED)) + LOG_WARNING("ETB: trace complete without triggering?"); - etm_ctx->capture_status &= ~TRACE_RUNNING; - etm_ctx->capture_status |= TRACE_COMPLETED; - } + retval |= TRACE_COMPLETED; } - return etm_ctx->capture_status; + /* NOTE: using a trigger is optional; and at least ETB11 has a mode + * where it can ignore the trigger counter. + */ + + /* update recorded state */ + etm_ctx->capture_status = retval; + + return retval; } static int etb_read_trace(etm_context_t *etm_ctx) @@ -654,8 +651,10 @@ static int etb_start_capture(etm_context_t *etm_ctx) etb_ctrl_value |= 0x2; } - if ((etm_ctx->portmode & ETM_PORT_MODE_MASK) == ETM_PORT_MUXED) + if ((etm_ctx->portmode & ETM_PORT_MODE_MASK) == ETM_PORT_MUXED) { + LOG_ERROR("ETB: can't run in multiplexed mode"); return ERROR_ETM_PORTMODE_NOT_SUPPORTED; + } trigger_count = (etb->ram_depth * etm_ctx->trigger_percent) / 100; -- cgit v1.2.3