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armv7m_trace, stlink: provide APIs to capture trace with an adapter

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Change-Id: I9d193dd5af382912e4fe838bd4f612cffd11b295
Signed-off-by: Paul Fertser <fercerpav@gmail.com>
Reviewed-on: http://openocd.zylin.com/2540
Tested-by: jenkins
This commit is contained in:
Paul Fertser
2015-02-10 13:32:07 +03:00
committed by Spencer Oliver
parent a09a75653d
commit 6819468a78
9 changed files with 234 additions and 203 deletions
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58
src/target/armv7m_trace.c
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@@ -20,6 +20,30 @@
#include <target/armv7m.h>
#include <target/cortex_m.h>
#include <target/armv7m_trace.h>
#include <jtag/interface.h>
#define TRACE_BUF_SIZE 4096
static int armv7m_poll_trace(void *target)
{
struct armv7m_common *armv7m = target_to_armv7m(target);
uint8_t buf[TRACE_BUF_SIZE];
size_t size = sizeof(buf);
int retval;
retval = adapter_poll_trace(buf, &size);
if (retval != ERROR_OK || !size)
return retval;
if (fwrite(buf, 1, size, armv7m->trace_config.trace_file) == size)
fflush(armv7m->trace_config.trace_file);
else {
LOG_ERROR("Error writing to the trace destination file");
return ERROR_FAIL;
}
return ERROR_OK;
}
int armv7m_trace_tpiu_config(struct target *target)
{
@@ -28,19 +52,38 @@ int armv7m_trace_tpiu_config(struct target *target)
int prescaler;
int retval;
target_unregister_timer_callback(armv7m_poll_trace, target);
retval = adapter_config_trace(trace_config->config_type == INTERNAL,
trace_config->pin_protocol,
trace_config->port_size,
&trace_config->trace_freq);
if (retval != ERROR_OK)
return retval;
if (!trace_config->trace_freq) {
LOG_ERROR("Trace port frequency is 0, can't enable TPIU");
return ERROR_FAIL;
}
if (trace_config->traceclkin_freq % trace_config->trace_freq) {
LOG_ERROR("Can not calculate an integer divisor to get %u trace port frequency from %u TRACECLKIN frequency",
trace_config->trace_freq, trace_config->traceclkin_freq);
return ERROR_FAIL;
}
prescaler = trace_config->traceclkin_freq / trace_config->trace_freq;
if (trace_config->traceclkin_freq % trace_config->trace_freq) {
prescaler++;
int trace_freq = trace_config->traceclkin_freq / prescaler;
LOG_INFO("Can not obtain %u trace port frequency from %u TRACECLKIN frequency, using %u instead",
trace_config->trace_freq, trace_config->traceclkin_freq,
trace_freq);
trace_config->trace_freq = trace_freq;
retval = adapter_config_trace(trace_config->config_type == INTERNAL,
trace_config->pin_protocol,
trace_config->port_size,
&trace_config->trace_freq);
if (retval != ERROR_OK)
return retval;
}
retval = target_write_u32(target, TPIU_CSPSR, 1 << trace_config->port_size);
if (retval != ERROR_OK)
return retval;
@@ -65,6 +108,9 @@ int armv7m_trace_tpiu_config(struct target *target)
if (retval != ERROR_OK)
return retval;
if (trace_config->config_type == INTERNAL)
target_register_timer_callback(armv7m_poll_trace, 1, 1, target);
target_call_event_callbacks(target, TARGET_EVENT_TRACE_CONFIG);
return ERROR_OK;

1
src/target/armv7m_trace.h
View File

@@ -15,6 +15,7 @@
#ifndef ARMV7M_TRACE_H
#define ARMV7M_TRACE_H
#include <target/target.h>
#include <command.h>
/**