+++ /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, write to the *
- * Free Software Foundation, Inc., *
- * 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. *
- ***************************************************************************/
-#ifdef HAVE_CONFIG_H
-#include "config.h"
-#endif
-
-#include "oocd_trace.h"
-#include "arm7_9_common.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_register_commands(struct command_context_s *cmd_ctx);
-
-static int oocd_trace_read_reg(oocd_trace_t *oocd_trace, int reg, u32 *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);
-
- 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\n", reg, *value);
-
- return ERROR_OK;
-}
-
-static int oocd_trace_write_reg(oocd_trace_t *oocd_trace, int reg, u32 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);
- LOG_DEBUG("reg #%i: 0x%8.8x\n", reg, value);
-
- return ERROR_OK;
-}
-
-static int oocd_trace_read_memory(oocd_trace_t *oocd_trace, uint8_t *data, u32 address, u32 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);
-
- bytes_to_read = size * 16;
- while (bytes_to_read > 0)
- {
- if ((bytes_read = read(oocd_trace->tty_fd,
- ((uint8_t*)data) + (size * 16) - bytes_to_read, bytes_to_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(etm_context_t *etm_ctx)
-{
- uint8_t trash[256];
- oocd_trace_t *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 */
- while ((bytes_read = read(oocd_trace->tty_fd, trash, sizeof(trash))) > 0)
- {
- LOG_DEBUG("%zi bytes read\n", bytes_read);
- };
-
- return ERROR_OK;
-}
-
-static trace_status_t oocd_trace_status(etm_context_t *etm_ctx)
-{
- oocd_trace_t *oocd_trace = etm_ctx->capture_driver_priv;
- u32 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(etm_context_t *etm_ctx)
-{
- oocd_trace_t *oocd_trace = etm_ctx->capture_driver_priv;
- u32 status, address;
- u32 first_frame = 0x0;
- u32 num_frames = 1048576;
- uint8_t *trace_data;
- u32 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(etmv1_trace_data_t) * 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(etm_context_t *etm_ctx)
-{
- oocd_trace_t *oocd_trace = etm_ctx->capture_driver_priv;
- u32 control = 0x1; /* 0x1: enabled */
- u32 trigger_count;
-
- if (((etm_ctx->portmode & ETM_PORT_MODE_MASK) != ETM_PORT_NORMAL)
- || ((etm_ctx->portmode & 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->portmode & 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 * etm_ctx->trigger_percent) / 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(etm_context_t *etm_ctx)
-{
- oocd_trace_t *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;
-}
-
-etm_capture_driver_t oocd_trace_capture_driver =
-{
- .name = "oocd_trace",
- .register_commands = oocd_trace_register_commands,
- .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,
-};
-
-static int handle_oocd_trace_config_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc)
-{
- target_t *target;
- armv4_5_common_t *armv4_5;
- arm7_9_common_t *arm7_9;
-
- if (argc != 2)
- {
- LOG_ERROR("incomplete 'oocd_trace config <target> <tty>' command");
- exit(-1);
- }
-
- target = get_current_target(cmd_ctx);
-
- 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");
- return ERROR_OK;
- }
-
- if (arm7_9->etm_ctx)
- {
- oocd_trace_t *oocd_trace = malloc(sizeof(oocd_trace_t));
-
- arm7_9->etm_ctx->capture_driver_priv = oocd_trace;
- oocd_trace->etm_ctx = arm7_9->etm_ctx;
-
- /* copy name of TTY device used to communicate with OpenOCD+trace */
- oocd_trace->tty = strndup(args[1], 256);
- }
- else
- {
- LOG_ERROR("target has no ETM defined, OpenOCD+trace left unconfigured");
- }
-
- return ERROR_OK;
-}
-
-static int handle_oocd_trace_status_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc)
-{
- target_t *target;
- armv4_5_common_t *armv4_5;
- arm7_9_common_t *arm7_9;
- oocd_trace_t *oocd_trace;
- u32 status;
-
- target = get_current_target(cmd_ctx);
-
- 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");
- return ERROR_OK;
- }
-
- if (!arm7_9->etm_ctx)
- {
- command_print(cmd_ctx, "current target doesn't have an ETM configured");
- return ERROR_OK;
- }
-
- if (strcmp(arm7_9->etm_ctx->capture_driver->name, "oocd_trace") != 0)
- {
- command_print(cmd_ctx, "current target's ETM capture driver isn't 'oocd_trace'");
- return ERROR_OK;
- }
-
- oocd_trace = (oocd_trace_t*)arm7_9->etm_ctx->capture_driver_priv;
-
- oocd_trace_read_reg(oocd_trace, OOCD_TRACE_STATUS, &status);
-
- if (status & 0x8)
- command_print(cmd_ctx, "trace clock locked");
- else
- command_print(cmd_ctx, "no trace clock");
-
- return ERROR_OK;
-}
-
-static int handle_oocd_trace_resync_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc)
-{
- target_t *target;
- armv4_5_common_t *armv4_5;
- arm7_9_common_t *arm7_9;
- oocd_trace_t *oocd_trace;
- size_t bytes_written;
- uint8_t cmd_array[1];
-
- target = get_current_target(cmd_ctx);
-
- 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");
- return ERROR_OK;
- }
-
- if (!arm7_9->etm_ctx)
- {
- command_print(cmd_ctx, "current target doesn't have an ETM configured");
- return ERROR_OK;
- }
-
- if (strcmp(arm7_9->etm_ctx->capture_driver->name, "oocd_trace") != 0)
- {
- command_print(cmd_ctx, "current target's ETM capture driver isn't 'oocd_trace'");
- return ERROR_OK;
- }
-
- oocd_trace = (oocd_trace_t*)arm7_9->etm_ctx->capture_driver_priv;
-
- cmd_array[0] = 0xf0;
-
- bytes_written = write(oocd_trace->tty_fd, cmd_array, 1);
-
- command_print(cmd_ctx, "requesting traceclock resync");
- LOG_DEBUG("resyncing traceclk pll");
-
- return ERROR_OK;
-}
-
-int oocd_trace_register_commands(struct command_context_s *cmd_ctx)
-{
- command_t *oocd_trace_cmd;
-
- oocd_trace_cmd = register_command(cmd_ctx, NULL, "oocd_trace", NULL, COMMAND_ANY, "OpenOCD+trace");
-
- register_command(cmd_ctx, oocd_trace_cmd, "config", handle_oocd_trace_config_command, COMMAND_CONFIG, NULL);
-
- register_command(cmd_ctx, oocd_trace_cmd, "status", handle_oocd_trace_status_command, COMMAND_EXEC, "display OpenOCD+trace status");
- register_command(cmd_ctx, oocd_trace_cmd, "resync", handle_oocd_trace_resync_command, COMMAND_EXEC, "resync OpenOCD+trace capture clock");
-
- return ERROR_OK;
-}
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