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authordrath <drath@b42882b7-edfa-0310-969c-e2dbd0fdcd60>2007-07-31 10:07:32 +0000
committerdrath <drath@b42882b7-edfa-0310-969c-e2dbd0fdcd60>2007-07-31 10:07:32 +0000
commitdbd95cb8a27ebe04ab7b788adbb83291bffb3e4f (patch)
tree13cd6c0ae354a14b894217317dcdac3d60991bad /src/target/oocd_trace.c
parentf251b925ffe230de9aa01849ba7b53230a5c492f (diff)
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- calculate cycles since last executed instruction when cycle-accurate tracing is enabled
- increase memory pseudo-image cache size to 1024 byte for improved trace analysis performance - added OpenOCD+trace as an ETM capture driver example implementation - new usbprog driver (thanks to Benedikt Sauter) git-svn-id: svn://svn.berlios.de/openocd/trunk@186 b42882b7-edfa-0310-969c-e2dbd0fdcd60
Diffstat (limited to 'src/target/oocd_trace.c')
-rw-r--r--src/target/oocd_trace.c429
1 files changed, 429 insertions, 0 deletions
diff --git a/src/target/oocd_trace.c b/src/target/oocd_trace.c
new file mode 100644
index 0000000..ff63820
--- /dev/null
+++ b/src/target/oocd_trace.c
@@ -0,0 +1,429 @@
+/***************************************************************************
+ * 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 <string.h>
+#include <errno.h>
+
+#include "oocd_trace.h"
+#include "etm.h"
+
+#include "log.h"
+#include "types.h"
+#include "binarybuffer.h"
+#include "target.h"
+#include "register.h"
+#include "jtag.h"
+#include "arm7_9_common.h"
+
+#include <stdlib.h>
+
+int oocd_trace_read_reg(oocd_trace_t *oocd_trace, int reg, u32 *value)
+{
+ size_t bytes_written, bytes_read, bytes_to_read;
+ u8 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, ((u8*)value) + 4 - bytes_to_read, bytes_to_read);
+ bytes_to_read -= bytes_read;
+ }
+
+ DEBUG("reg #%i: 0x%8.8x\n", reg, *value);
+
+ return ERROR_OK;
+}
+
+int oocd_trace_write_reg(oocd_trace_t *oocd_trace, int reg, u32 value)
+{
+ size_t bytes_written;
+ u8 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);
+ DEBUG("reg #%i: 0x%8.8x\n", reg, value);
+
+ return ERROR_OK;
+}
+
+int oocd_trace_read_memory(oocd_trace_t *oocd_trace, u8 *data, u32 address, u32 size)
+{
+ size_t bytes_written, bytes_read, bytes_to_read;
+ u8 cmd;
+ int i;
+
+ 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,
+ ((u8*)data) + (size * 16) - bytes_to_read, bytes_to_read)) < 0)
+ {
+ DEBUG("read() returned %i (%s)", bytes_read, strerror(errno));
+ }
+ else
+ bytes_to_read -= bytes_read;
+ }
+
+ return ERROR_OK;
+}
+
+int oocd_trace_init(etm_context_t *etm_ctx)
+{
+ u8 trash[256];
+ oocd_trace_t *oocd_trace = etm_ctx->capture_driver_priv;
+ size_t bytes_written, bytes_read, bytes_to_read;
+
+ oocd_trace->tty_fd = open(oocd_trace->tty, O_RDWR | O_NOCTTY | O_NONBLOCK);
+
+ if(oocd_trace->tty_fd < 0)
+ {
+ 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)
+ {
+ DEBUG("%i bytes read\n", bytes_read);
+ };
+
+ return ERROR_OK;
+}
+
+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;
+}
+
+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;
+ u8 *trace_data;
+ int 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(u8) * 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;
+}
+
+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))
+ {
+ 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;
+}
+
+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,
+};
+
+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)
+ {
+ 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
+ {
+ ERROR("target has no ETM defined, OpenOCD+trace left unconfigured");
+ }
+
+ return ERROR_OK;
+}
+
+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;
+}
+
+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;
+ u32 status;
+ size_t bytes_written;
+ u8 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");
+ 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;
+}