+++ /dev/null
-/***************************************************************************
- * Copyright (C) 2007 by Dominic Rath *
- * Dominic.Rath@gmx.de *
- * *
- * This program is free software; you can redistribute it and/or modify *
- * it under the terms of the GNU General Public License as published by *
- * the Free Software Foundation; either version 2 of the License, or *
- * (at your option) any later version. *
- * *
- * This program is distributed in the hope that it will be useful, *
- * but WITHOUT ANY WARRANTY; without even the implied warranty of *
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the *
- * GNU General Public License for more details. *
- * *
- * You should have received a copy of the GNU General Public License *
- * along with this program. If not, see <http://www.gnu.org/licenses/>. *
- ***************************************************************************/
-
-#ifdef HAVE_CONFIG_H
-#include "config.h"
-#endif
-
-#include "arm.h"
-#include "etm.h"
-#include "oocd_trace.h"
-
-/*
- * This is "proof of concept" code, for prototype hardware:
- * https://lists.berlios.de/pipermail/openocd-development/2007-September/000336.html
- */
-
-static int oocd_trace_read_reg(struct oocd_trace *oocd_trace, int reg, uint32_t *value)
-{
- size_t bytes_written, bytes_read, bytes_to_read;
- uint8_t cmd;
-
- cmd = 0x10 | (reg & 0x7);
- bytes_written = write(oocd_trace->tty_fd, &cmd, 1);
- if (bytes_written < 1)
- return ERROR_FAIL;
-
- bytes_to_read = 4;
- while (bytes_to_read > 0) {
- bytes_read = read(oocd_trace->tty_fd, ((uint8_t *)value) + 4 - bytes_to_read, bytes_to_read);
- bytes_to_read -= bytes_read;
- }
-
- LOG_DEBUG("reg #%i: 0x%8.8x", reg, *value);
-
- return ERROR_OK;
-}
-
-static int oocd_trace_write_reg(struct oocd_trace *oocd_trace, int reg, uint32_t value)
-{
- size_t bytes_written;
- uint8_t data[5];
-
- data[0] = 0x18 | (reg & 0x7);
- data[1] = value & 0xff;
- data[2] = (value & 0xff00) >> 8;
- data[3] = (value & 0xff0000) >> 16;
- data[4] = (value & 0xff000000) >> 24;
-
- bytes_written = write(oocd_trace->tty_fd, data, 5);
- if (bytes_written < 5)
- return ERROR_FAIL;
-
- LOG_DEBUG("reg #%i: 0x%8.8x", reg, value);
-
- return ERROR_OK;
-}
-
-static int oocd_trace_read_memory(struct oocd_trace *oocd_trace, uint8_t *data, uint32_t address, uint32_t size)
-{
- size_t bytes_written, bytes_to_read;
- ssize_t bytes_read;
- uint8_t cmd;
-
- oocd_trace_write_reg(oocd_trace, OOCD_TRACE_ADDRESS, address);
- oocd_trace_write_reg(oocd_trace, OOCD_TRACE_SDRAM_COUNTER, size);
-
- cmd = 0x20;
- bytes_written = write(oocd_trace->tty_fd, &cmd, 1);
- if (bytes_written < 1)
- return ERROR_FAIL;
-
- bytes_to_read = size * 16;
- while (bytes_to_read > 0) {
- bytes_read = read(oocd_trace->tty_fd,
- ((uint8_t *)data) + (size * 16) - bytes_to_read, bytes_to_read);
- if (bytes_read < 0)
- LOG_DEBUG("read() returned %zi (%s)", bytes_read, strerror(errno));
- else
- bytes_to_read -= bytes_read;
- }
-
- return ERROR_OK;
-}
-
-static int oocd_trace_init(struct etm_context *etm_ctx)
-{
- uint8_t trash[256];
- struct oocd_trace *oocd_trace = etm_ctx->capture_driver_priv;
- size_t bytes_read;
-
- oocd_trace->tty_fd = open(oocd_trace->tty, O_RDWR | O_NOCTTY | O_NONBLOCK);
-
- if (oocd_trace->tty_fd < 0) {
- LOG_ERROR("can't open tty");
- return ERROR_ETM_CAPTURE_INIT_FAILED;
- }
-
- /* clear input & output buffers, then switch to "blocking mode" */
- tcflush(oocd_trace->tty_fd, TCOFLUSH);
- tcflush(oocd_trace->tty_fd, TCIFLUSH);
- fcntl(oocd_trace->tty_fd, F_SETFL, fcntl(oocd_trace->tty_fd, F_GETFL) & ~O_NONBLOCK);
-
- tcgetattr(oocd_trace->tty_fd, &oocd_trace->oldtio); /* save current port settings */
-
- bzero(&oocd_trace->newtio, sizeof(oocd_trace->newtio));
- oocd_trace->newtio.c_cflag = CS8 | CLOCAL | CREAD | B2500000;
-
- oocd_trace->newtio.c_iflag = IGNPAR | IGNBRK | IXON | IXOFF;
- oocd_trace->newtio.c_oflag = 0;
-
- /* set input mode (non-canonical, no echo,...) */
- oocd_trace->newtio.c_lflag = 0;
-
- cfmakeraw(&oocd_trace->newtio);
- oocd_trace->newtio.c_cc[VTIME] = 1; /* inter-character timer used */
- oocd_trace->newtio.c_cc[VMIN] = 0; /* blocking read until 0 chars received */
-
- tcflush(oocd_trace->tty_fd, TCIFLUSH);
- tcsetattr(oocd_trace->tty_fd, TCSANOW, &oocd_trace->newtio);
-
- /* occasionally one bogus character is left in the input buffer
- * read up any leftover characters to ensure communication is in sync */
- do {
- bytes_read = read(oocd_trace->tty_fd, trash, sizeof(trash));
- if (bytes_read)
- LOG_DEBUG("%zi bytes read", bytes_read);
- } while (bytes_read > 0);
-
- return ERROR_OK;
-}
-
-static trace_status_t oocd_trace_status(struct etm_context *etm_ctx)
-{
- struct oocd_trace *oocd_trace = etm_ctx->capture_driver_priv;
- uint32_t status;
-
- oocd_trace_read_reg(oocd_trace, OOCD_TRACE_STATUS, &status);
-
- /* 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) {
- /* check Full bit to identify an overflow */
- if (status & 0x4)
- etm_ctx->capture_status |= TRACE_OVERFLOWED;
-
- /* check Triggered bit to identify trigger condition */
- if (status & 0x2)
- etm_ctx->capture_status |= TRACE_TRIGGERED;
-
- if (status & 0x1) {
- etm_ctx->capture_status &= ~TRACE_RUNNING;
- etm_ctx->capture_status |= TRACE_COMPLETED;
- }
- }
-
- return etm_ctx->capture_status;
-}
-
-static int oocd_trace_read_trace(struct etm_context *etm_ctx)
-{
- struct oocd_trace *oocd_trace = etm_ctx->capture_driver_priv;
- uint32_t status, address;
- uint32_t first_frame = 0x0;
- uint32_t num_frames = 1048576;
- uint8_t *trace_data;
- uint32_t i;
-
- oocd_trace_read_reg(oocd_trace, OOCD_TRACE_STATUS, &status);
- oocd_trace_read_reg(oocd_trace, OOCD_TRACE_ADDRESS, &address);
-
- /* check if we overflowed, and adjust first frame of the trace accordingly
- * if we didn't overflow, read only up to the frame that would be written next,
- * i.e. don't read invalid entries
- */
- if (status & 0x4)
- first_frame = address;
- else
- num_frames = address;
-
- /* read data into temporary array for unpacking
- * one frame from OpenOCD + trace corresponds to 16 trace cycles
- */
- trace_data = malloc(sizeof(uint8_t) * num_frames * 16);
- oocd_trace_read_memory(oocd_trace, trace_data, first_frame, num_frames);
-
- if (etm_ctx->trace_depth > 0)
- free(etm_ctx->trace_data);
-
- etm_ctx->trace_depth = num_frames * 16;
- etm_ctx->trace_data = malloc(sizeof(struct etmv1_trace_data) * etm_ctx->trace_depth);
-
- for (i = 0; i < num_frames * 16; i++) {
- etm_ctx->trace_data[i].pipestat = (trace_data[i] & 0x7);
- etm_ctx->trace_data[i].packet = (trace_data[i] & 0x78) >> 3;
- etm_ctx->trace_data[i].flags = 0;
-
- if ((trace_data[i] & 0x80) >> 7)
- etm_ctx->trace_data[i].flags |= ETMV1_TRACESYNC_CYCLE;
-
- if (etm_ctx->trace_data[i].pipestat == STAT_TR) {
- etm_ctx->trace_data[i].pipestat = etm_ctx->trace_data[i].packet & 0x7;
- etm_ctx->trace_data[i].flags |= ETMV1_TRIGGER_CYCLE;
- }
- }
-
- free(trace_data);
-
- return ERROR_OK;
-}
-
-static int oocd_trace_start_capture(struct etm_context *etm_ctx)
-{
- struct oocd_trace *oocd_trace = etm_ctx->capture_driver_priv;
- uint32_t control = 0x1; /* 0x1: enabled */
- uint32_t trigger_count;
-
- if (((etm_ctx->control & ETM_PORT_MODE_MASK) != ETM_PORT_NORMAL)
- || ((etm_ctx->control & ETM_PORT_WIDTH_MASK) != ETM_PORT_4BIT)) {
- LOG_DEBUG("OpenOCD + trace only supports normal 4-bit ETM mode");
- return ERROR_ETM_PORTMODE_NOT_SUPPORTED;
- }
-
- if ((etm_ctx->control & ETM_PORT_CLOCK_MASK) == ETM_PORT_HALF_CLOCK)
- control |= 0x2; /* half rate clock, capture at twice the clock rate */
-
- /* OpenOCD + trace holds up to 16 million samples,
- * but trigger counts is set in multiples of 16 */
- trigger_count = (1048576 * /* trigger_percent */ 50) / 100;
-
- /* capturing always starts at address zero */
- oocd_trace_write_reg(oocd_trace, OOCD_TRACE_ADDRESS, 0x0);
- oocd_trace_write_reg(oocd_trace, OOCD_TRACE_TRIGGER_COUNTER, trigger_count);
- oocd_trace_write_reg(oocd_trace, OOCD_TRACE_CONTROL, control);
-
- /* we're starting a new trace, initialize capture status */
- etm_ctx->capture_status = TRACE_RUNNING;
-
- return ERROR_OK;
-}
-
-static int oocd_trace_stop_capture(struct etm_context *etm_ctx)
-{
- struct oocd_trace *oocd_trace = etm_ctx->capture_driver_priv;
-
- /* trace stopped, just clear running flag, but preserve others */
- etm_ctx->capture_status &= ~TRACE_RUNNING;
-
- oocd_trace_write_reg(oocd_trace, OOCD_TRACE_CONTROL, 0x0);
-
- return ERROR_OK;
-}
-
-COMMAND_HANDLER(handle_oocd_trace_config_command)
-{
- struct target *target;
- struct arm *arm;
-
- if (CMD_ARGC != 2)
- return ERROR_COMMAND_SYNTAX_ERROR;
-
- target = get_current_target(CMD_CTX);
- arm = target_to_arm(target);
- if (!is_arm(arm)) {
- command_print(CMD, "current target isn't an ARM");
- return ERROR_FAIL;
- }
-
- if (arm->etm) {
- struct oocd_trace *oocd_trace = malloc(sizeof(struct oocd_trace));
-
- arm->etm->capture_driver_priv = oocd_trace;
- oocd_trace->etm_ctx = arm->etm;
-
- /* copy name of TTY device used to communicate with OpenOCD + trace */
- oocd_trace->tty = strndup(CMD_ARGV[1], 256);
- } else
- LOG_ERROR("target has no ETM defined, OpenOCD + trace left unconfigured");
-
- return ERROR_OK;
-}
-
-COMMAND_HANDLER(handle_oocd_trace_status_command)
-{
- struct target *target;
- struct arm *arm;
- struct oocd_trace *oocd_trace;
- uint32_t status;
-
- target = get_current_target(CMD_CTX);
-
- arm = target_to_arm(target);
- if (!is_arm(arm)) {
- command_print(CMD, "current target isn't an ARM");
- return ERROR_FAIL;
- }
-
- if (!arm->etm) {
- command_print(CMD, "current target doesn't have an ETM configured");
- return ERROR_FAIL;
- }
-
- if (strcmp(arm->etm->capture_driver->name, "oocd_trace") != 0) {
- command_print(CMD, "current target's ETM capture driver isn't 'oocd_trace'");
- return ERROR_FAIL;
- }
-
- oocd_trace = (struct oocd_trace *)arm->etm->capture_driver_priv;
-
- oocd_trace_read_reg(oocd_trace, OOCD_TRACE_STATUS, &status);
-
- if (status & 0x8)
- command_print(CMD, "trace clock locked");
- else
- command_print(CMD, "no trace clock");
-
- return ERROR_OK;
-}
-
-COMMAND_HANDLER(handle_oocd_trace_resync_command)
-{
- struct target *target;
- struct arm *arm;
- struct oocd_trace *oocd_trace;
- size_t bytes_written;
- uint8_t cmd_array[1];
-
- target = get_current_target(CMD_CTX);
-
- arm = target_to_arm(target);
- if (!is_arm(arm)) {
- command_print(CMD, "current target isn't an ARM");
- return ERROR_FAIL;
- }
-
- if (!arm->etm) {
- command_print(CMD, "current target doesn't have an ETM configured");
- return ERROR_FAIL;
- }
-
- if (strcmp(arm->etm->capture_driver->name, "oocd_trace") != 0) {
- command_print(CMD, "current target's ETM capture driver isn't 'oocd_trace'");
- return ERROR_FAIL;
- }
-
- oocd_trace = (struct oocd_trace *)arm->etm->capture_driver_priv;
-
- cmd_array[0] = 0xf0;
-
- bytes_written = write(oocd_trace->tty_fd, cmd_array, 1);
- if (bytes_written < 1)
- return ERROR_FAIL;
-
- command_print(CMD, "requesting traceclock resync");
- LOG_DEBUG("resyncing traceclk pll");
-
- return ERROR_OK;
-}
-
-static const struct command_registration oocd_trace_all_command_handlers[] = {
- {
- .name = "config",
- .handler = handle_oocd_trace_config_command,
- .mode = COMMAND_CONFIG,
- .usage = "<target> <tty>",
- },
- {
- .name = "status",
- .handler = handle_oocd_trace_status_command,
- .mode = COMMAND_EXEC,
- .usage = "",
- .help = "display OpenOCD + trace status",
- },
- {
- .name = "resync",
- .handler = handle_oocd_trace_resync_command,
- .mode = COMMAND_EXEC,
- .usage = "",
- .help = "resync OpenOCD + trace capture clock",
- },
- COMMAND_REGISTRATION_DONE
-};
-static const struct command_registration oocd_trace_command_handlers[] = {
- {
- .name = "oocd_trace",
- .mode = COMMAND_ANY,
- .help = "OpenOCD trace capture driver command group",
- .usage = "",
- .chain = oocd_trace_all_command_handlers,
- },
- COMMAND_REGISTRATION_DONE
-};
-
-struct etm_capture_driver oocd_trace_capture_driver = {
- .name = "oocd_trace",
- .commands = oocd_trace_command_handlers,
- .init = oocd_trace_init,
- .status = oocd_trace_status,
- .start_capture = oocd_trace_start_capture,
- .stop_capture = oocd_trace_stop_capture,
- .read_trace = oocd_trace_read_trace,
-};
Code Review / openocd.git / commitdiff