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openrisc: add profiling function 

Change-Id: Ifee89b289069590e6086a4713b165989578e29ec
Signed-off-by: Franck Jullien <franck.jullien@gmail.com>
Reviewed-on: http://openocd.zylin.com/2494
Tested-by: jenkins
Reviewed-by: Spencer Oliver <spen@spen-soft.co.uk>
__archive__
Franck Jullien 2015-01-23 14:09:14 +01:00 committed by Paul Fertser
parent 217403ce09
commit b4b1976e4e
1 changed files with 50 additions and 0 deletions
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50
src/target/openrisc/or1k.c
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@ -29,6 +29,7 @@
#include <target/target.h>
#include <target/breakpoints.h>
#include <target/target_type.h>
#include <helper/time_support.h>
#include <helper/fileio.h>
#include "or1k_tap.h"
#include "or1k.h"
@ -1205,6 +1206,53 @@ static int or1k_checksum_memory(struct target *target, uint32_t address,
return ERROR_FAIL;
}
static int or1k_profiling(struct target *target, uint32_t *samples,
uint32_t max_num_samples, uint32_t *num_samples, uint32_t seconds)
{
struct timeval timeout, now;
struct or1k_common *or1k = target_to_or1k(target);
struct or1k_du *du_core = or1k_to_du(or1k);
int retval = ERROR_OK;
gettimeofday(&timeout, NULL);
timeval_add_time(&timeout, seconds, 0);
LOG_INFO("Starting or1k profiling. Sampling npc as fast as we can...");
/* Make sure the target is running */
target_poll(target);
if (target->state == TARGET_HALTED)
retval = target_resume(target, 1, 0, 0, 0);
if (retval != ERROR_OK) {
LOG_ERROR("Error while resuming target");
return retval;
}
uint32_t sample_count = 0;
for (;;) {
uint32_t reg_value;
retval = du_core->or1k_jtag_read_cpu(&or1k->jtag, GROUP0 + 16 /* NPC */, 1, &reg_value);
if (retval != ERROR_OK) {
LOG_ERROR("Error while reading NPC");
return retval;
}
samples[sample_count++] = reg_value;
gettimeofday(&now, NULL);
if ((sample_count >= max_num_samples) ||
((now.tv_sec >= timeout.tv_sec) && (now.tv_usec >= timeout.tv_usec))) {
LOG_INFO("Profiling completed. %" PRIu32 " samples.", sample_count);
break;
}
}
*num_samples = sample_count;
return retval;
}
COMMAND_HANDLER(or1k_tap_select_command_handler)
{
struct target *target = get_current_target(CMD_CTX);
@ -1406,4 +1454,6 @@ struct target_type or1k_target = {
.examine = or1k_examine,
.get_gdb_fileio_info = or1k_get_gdb_fileio_info,
.profiling = or1k_profiling,
};