#include "config.h"
#endif
+#include <string.h>
+
#include "arm7_9_common.h"
#include "etb.h"
+#include "etm.h"
#include "log.h"
#include "types.h"
int etb_write_reg(reg_t *reg, u32 value);
int etb_read_reg(reg_t *reg);
-int handle_arm7_9_etb_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc);
-int handle_arm7_9_etb_dump_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc);
-
-char *etmv1_branch_reason_string[] =
-{
- "normal pc change", "tracing enabled", "restart after FIFO overflow",
- "exit from debug state", "peridoic synchronization point",
- "reserved", "reserved", "reserved"
-};
-
+int handle_etb_config_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc);
int etb_set_instr(etb_t *etb, u32 new_instr)
{
return ERROR_OK;
}
+int etb_read_ram(etb_t *etb, u32 *data, int num_frames)
+{
+ scan_field_t fields[3];
+ int i;
+
+ jtag_add_end_state(TAP_RTI);
+ etb_scann(etb, 0x0);
+ etb_set_instr(etb, 0xc);
+
+ fields[0].device = etb->chain_pos;
+ fields[0].num_bits = 32;
+ fields[0].out_value = NULL;
+ fields[0].out_mask = NULL;
+ fields[0].in_value = NULL;
+ fields[0].in_check_value = NULL;
+ fields[0].in_check_mask = NULL;
+ fields[0].in_handler = NULL;
+ fields[0].in_handler_priv = NULL;
+
+ fields[1].device = etb->chain_pos;
+ fields[1].num_bits = 7;
+ fields[1].out_value = malloc(1);
+ buf_set_u32(fields[1].out_value, 0, 7, 4);
+ fields[1].out_mask = NULL;
+ fields[1].in_value = NULL;
+ fields[1].in_check_value = NULL;
+ fields[1].in_check_mask = NULL;
+ fields[1].in_handler = NULL;
+ fields[1].in_handler_priv = NULL;
+
+ fields[2].device = etb->chain_pos;
+ fields[2].num_bits = 1;
+ fields[2].out_value = malloc(1);
+ buf_set_u32(fields[2].out_value, 0, 1, 0);
+ fields[2].out_mask = NULL;
+ fields[2].in_value = NULL;
+ fields[2].in_check_value = NULL;
+ fields[2].in_check_mask = NULL;
+ fields[2].in_handler = NULL;
+ fields[2].in_handler_priv = NULL;
+
+ jtag_add_dr_scan(3, fields, -1, NULL);
+
+ fields[0].in_handler = buf_to_u32_handler;
+
+ for (i = 0; i < num_frames; i++)
+ {
+ /* ensure nR/W reamins set to read */
+ buf_set_u32(fields[2].out_value, 0, 1, 0);
+
+ /* address remains set to 0x4 (RAM data) until we read the last frame */
+ if (i < num_frames - 1)
+ buf_set_u32(fields[1].out_value, 0, 7, 4);
+ else
+ buf_set_u32(fields[1].out_value, 0, 7, 0);
+
+ fields[0].in_handler_priv = &data[i];
+ jtag_add_dr_scan(3, fields, -1, NULL);
+ }
+
+ jtag_execute_queue();
+
+ free(fields[1].out_value);
+ free(fields[2].out_value);
+
+ return ERROR_OK;
+}
+
int etb_read_reg_w_check(reg_t *reg, u8* check_value, u8* check_mask)
{
etb_reg_t *etb_reg = reg->arch_info;
return etb_write_reg(reg, buf_get_u32(reg->value, 0, reg->size));
}
-int etb_register_commands(struct command_context_s *cmd_ctx, command_t *arm7_9_cmd)
+int etb_register_commands(struct command_context_s *cmd_ctx)
{
- register_command(cmd_ctx, arm7_9_cmd, "etb", handle_arm7_9_etb_command, COMMAND_CONFIG, NULL);
+ command_t *etb_cmd;
+
+ etb_cmd = register_command(cmd_ctx, NULL, "etb", NULL, COMMAND_ANY, "Embedded Trace Buffer");
+
+ register_command(cmd_ctx, etb_cmd, "config", handle_etb_config_command, COMMAND_CONFIG, NULL);
+
+ return ERROR_OK;
+}
- register_command(cmd_ctx, arm7_9_cmd, "etb_dump", handle_arm7_9_etb_dump_command, COMMAND_EXEC, "dump current ETB content");
+int handle_etb_config_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc)
+{
+ target_t *target;
+ jtag_device_t *jtag_device;
+ armv4_5_common_t *armv4_5;
+ arm7_9_common_t *arm7_9;
+
+ if (argc != 2)
+ {
+ ERROR("incomplete 'etb config <target> <chain_pos>' command");
+ exit(-1);
+ }
+
+ target = get_target_by_num(strtoul(args[0], NULL, 0));
+
+ if (!target)
+ {
+ ERROR("target number '%s' not defined", args[0]);
+ exit(-1);
+ }
+
+ 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;
+ }
+
+ jtag_device = jtag_get_device(strtoul(args[1], NULL, 0));
+
+ if (!jtag_device)
+ {
+ ERROR("jtag device number '%s' not defined", args[1]);
+ exit(-1);
+ }
+
+ if (arm7_9->etm_ctx)
+ {
+ etb_t *etb = malloc(sizeof(etb_t));
+
+ arm7_9->etm_ctx->capture_driver_priv = etb;
+
+ etb->chain_pos = strtoul(args[1], NULL, 0);
+ etb->cur_scan_chain = -1;
+ etb->reg_cache = NULL;
+ etb->ram_width = 0;
+ etb->ram_depth = 0;
+ }
+ else
+ {
+ ERROR("target has no ETM defined, ETB left unconfigured");
+ }
return ERROR_OK;
}
-#define PIPESTAT(x) ((x) & 0x7)
-#define TRACEPKT(x) (((x) & 0x7fff8) >> 3)
-#define TRACESYNC(x) (((x) & 0x80000) >> 19)
+int etb_init(etm_context_t *etm_ctx)
+{
+ etb_t *etb = etm_ctx->capture_driver_priv;
+
+ etb->etm_ctx = etm_ctx;
+
+ /* identify ETB RAM depth and width */
+ etb_read_reg(&etb->reg_cache->reg_list[ETB_RAM_DEPTH]);
+ etb_read_reg(&etb->reg_cache->reg_list[ETB_RAM_WIDTH]);
+ jtag_execute_queue();
+
+ etb->ram_depth = buf_get_u32(etb->reg_cache->reg_list[ETB_RAM_DEPTH].value, 0, 32);
+ etb->ram_width = buf_get_u32(etb->reg_cache->reg_list[ETB_RAM_WIDTH].value, 0, 32);
+
+ return ERROR_OK;
+}
-int etmv1_next_packet(int trace_depth, u32 *trace_data, int frame, int *port_half, int apo, u8 *packet)
+trace_status_t etb_status(etm_context_t *etm_ctx)
{
- while (frame < trace_depth)
+ etb_t *etb = etm_ctx->capture_driver_priv;
+
+ etb->etm_ctx = etm_ctx;
+
+ /* if tracing is currently idle, return this information */
+ if (etm_ctx->capture_status == TRACE_IDLE)
{
- if (apo > 0)
- {
- if (TRACESYNC(trace_data[frame]))
- apo--;
- }
- else
+ return etm_ctx->capture_status;
+ }
+ else if (etm_ctx->capture_status & TRACE_RUNNING)
+ {
+ reg_t *etb_status_reg = &etb->reg_cache->reg_list[ETB_STATUS];
+ int etb_timeout = 100;
+
+ /* trace is running, check the ETB status flags */
+ etb_get_reg(etb_status_reg);
+
+ /* check Full bit to identify an overflow */
+ if (buf_get_u32(etb_status_reg->value, 0, 1) == 1)
+ etm_ctx->capture_status |= TRACE_OVERFLOWED;
+
+ /* check Triggered bit to identify trigger condition */
+ if (buf_get_u32(etb_status_reg->value, 1, 1) == 1)
+ etm_ctx->capture_status |= TRACE_TRIGGERED;
+
+ /* check AcqComp to identify trace completion */
+ if (buf_get_u32(etb_status_reg->value, 2, 1) == 1)
{
- /* we're looking for a branch address, skip if TRACESYNC isn't set */
- if ((apo == 0) && (!TRACESYNC(trace_data[frame])))
+ while (etb_timeout-- && (buf_get_u32(etb_status_reg->value, 3, 1) == 0))
{
- frame++;
- continue;
+ /* wait for data formatter idle */
+ etb_get_reg(etb_status_reg);
}
-
- /* TRACEPKT is valid if this isn't a TD nor a TRIGGER cycle */
- if (((PIPESTAT(trace_data[frame]) != 0x7) && (PIPESTAT(trace_data[frame]) != 0x6))
- && !((apo == 0) && (!TRACESYNC(trace_data[frame]))))
+
+ if (etb_timeout == 0)
+ {
+ ERROR("AcqComp set but DFEmpty won't go high, ETB status: 0x%x",
+ buf_get_u32(etb_status_reg->value, 0, etb_status_reg->size));
+ }
+
+ if (!(etm_ctx->capture_status && TRACE_TRIGGERED))
{
- if (*port_half == 0)
- {
- *packet = TRACEPKT(trace_data[frame]) & 0xff;
- *port_half = 1;
- }
- else
- {
- *packet = (TRACEPKT(trace_data[frame]) & 0xff00) >> 8;
- *port_half = 0;
- frame++;
- }
- return frame;
+ ERROR("trace completed, but no trigger condition detected");
}
+
+ etm_ctx->capture_status &= ~TRACE_RUNNING;
+ etm_ctx->capture_status |= TRACE_COMPLETED;
}
- frame++;
}
- /* we reached the end of the trace without finding the packet we're looking for
- * tracing is finished
- */
- return -1;
+ return etm_ctx->capture_status;
}
-int handle_arm7_9_etb_dump_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc)
+int etb_read_trace(etm_context_t *etm_ctx)
{
- int retval;
- target_t *target = get_current_target(cmd_ctx);
- armv4_5_common_t *armv4_5;
- arm7_9_common_t *arm7_9;
- int i, j, k;
+ etb_t *etb = etm_ctx->capture_driver_priv;
int first_frame = 0;
- int last_frame;
- int addressbits_valid = 0;
- u32 address = 0x0;
- u32 *trace_data;
- int port_half = 0;
- int last_instruction = -1;
- u8 branch_reason;
- u8 packet;
- char trace_output[256];
- int trace_output_len;
- u8 apo;
-
- 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;
- }
+ int num_frames = etb->ram_depth;
+ u32 *trace_data = NULL;
+ int i, j;
+
+ etb_read_reg(&etb->reg_cache->reg_list[ETB_STATUS]);
+ etb_read_reg(&etb->reg_cache->reg_list[ETB_RAM_WRITE_POINTER]);
+ jtag_execute_queue();
- if (!arm7_9->etb)
+ /* 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 (buf_get_u32(etb->reg_cache->reg_list[ETB_STATUS].value, 0, 1))
{
- command_print(cmd_ctx, "no ETB configured for current target");
- return ERROR_OK;
+ first_frame = buf_get_u32(etb->reg_cache->reg_list[ETB_RAM_WRITE_POINTER].value, 0, 32);
}
-
- if (!(arm7_9->etb->RAM_depth && arm7_9->etb->RAM_width))
+ else
{
- /* identify ETB RAM depth and width */
- etb_read_reg(&arm7_9->etb->reg_cache->reg_list[ETB_RAM_DEPTH]);
- etb_read_reg(&arm7_9->etb->reg_cache->reg_list[ETB_RAM_WIDTH]);
- jtag_execute_queue();
-
- arm7_9->etb->RAM_depth = buf_get_u32(arm7_9->etb->reg_cache->reg_list[ETB_RAM_DEPTH].value, 0, 32);
- arm7_9->etb->RAM_width = buf_get_u32(arm7_9->etb->reg_cache->reg_list[ETB_RAM_WIDTH].value, 0, 32);
+ num_frames = buf_get_u32(etb->reg_cache->reg_list[ETB_RAM_WRITE_POINTER].value, 0, 32);
}
- trace_data = malloc(sizeof(u32) * arm7_9->etb->RAM_depth);
-
- etb_read_reg(&arm7_9->etb->reg_cache->reg_list[ETB_STATUS]);
- etb_read_reg(&arm7_9->etb->reg_cache->reg_list[ETB_RAM_WRITE_POINTER]);
- jtag_execute_queue();
-
- /* check if we overflowed, and adjust first and last frame of the trace accordingly */
- if (buf_get_u32(arm7_9->etb->reg_cache->reg_list[ETB_STATUS].value, 1, 1))
+ etb_write_reg(&etb->reg_cache->reg_list[ETB_RAM_READ_POINTER], first_frame);
+
+ /* read data into temporary array for unpacking */
+ trace_data = malloc(sizeof(u32) * num_frames);
+ etb_read_ram(etb, trace_data, num_frames);
+
+ if (etm_ctx->trace_depth > 0)
{
- first_frame = buf_get_u32(arm7_9->etb->reg_cache->reg_list[ETB_RAM_WRITE_POINTER].value, 0, 32);
+ free(etm_ctx->trace_data);
}
- last_frame = buf_get_u32(arm7_9->etb->reg_cache->reg_list[ETB_RAM_WRITE_POINTER].value, 0, 32) - 1;
-
- etb_write_reg(&arm7_9->etb->reg_cache->reg_list[ETB_RAM_READ_POINTER], first_frame);
+ if ((etm_ctx->portmode & ETM_PORT_MODE_MASK) == ETM_PORT_DEMUXED)
+ etm_ctx->trace_depth = num_frames * 2;
+ else
+ etm_ctx->trace_depth = num_frames;
- /* read trace data from ETB */
- i = first_frame;
- j = 0;
- do {
- etb_read_reg(&arm7_9->etb->reg_cache->reg_list[ETB_RAM_DATA]);
- jtag_execute_queue();
- trace_data[j++] = buf_get_u32(arm7_9->etb->reg_cache->reg_list[ETB_RAM_DATA].value, 0, 32);
- i++;
- } while ((i % arm7_9->etb->RAM_depth) != (first_frame % arm7_9->etb->RAM_depth));
+ etm_ctx->trace_data= malloc(sizeof(etmv1_trace_data_t) * etm_ctx->trace_depth);
- for (i = 0, j = 0; i < arm7_9->etb->RAM_depth; i++)
+ for (i = 0, j = 0; i < num_frames; i++)
{
- int trigger = 0;
-
- trace_output_len = 0;
-
- /* catch trigger, actual PIPESTAT is encoded in TRACEPKT[2:0] */
- if (PIPESTAT(trace_data[i]) == 0x6)
+ if ((etm_ctx->portmode & ETM_PORT_MODE_MASK) == ETM_PORT_DEMUXED)
{
- trigger = 1;
- trace_data[i] &= ~0x7;
- trace_data[i] |= TRACEPKT(trace_data[i]) & 0x7;
- }
-
- if (addressbits_valid == 32)
- {
- trace_output_len += snprintf(trace_output + trace_output_len, 256 - trace_output_len,
- "%i: 0x%8.8x %s", i, address, (trigger) ? "(TRIGGER) " : "");
- }
- else if (addressbits_valid != 0)
- {
- trace_output_len += snprintf(trace_output + trace_output_len, 256 - trace_output_len,
- "%i: 0x...%x %s", i, address, (trigger) ? "(TRIGGER) " : "");
+ etm_ctx->trace_data[j].pipestat = trace_data[i] & 0x7;
+ etm_ctx->trace_data[j].packet = (trace_data[i] & 0x7f8) >> 3;
+ etm_ctx->trace_data[j].tracesync = (trace_data[i] & 0x800) >> 11;
+
+ etm_ctx->trace_data[j+1].pipestat = (trace_data[i] & 0x7000) >> 12;
+ etm_ctx->trace_data[j+1].packet = (trace_data[i] & 0x7f8000) >> 15;
+ etm_ctx->trace_data[j+1].tracesync = (trace_data[i] & 0x800000) >> 23;
+
+ j += 2;
}
else
{
- trace_output_len += snprintf(trace_output + trace_output_len, 256 - trace_output_len,
- "%i: 0xUNK %s", i, (trigger) ? "(TRIGGER) " : "");
- }
-
- switch (PIPESTAT(trace_data[i]))
- {
- case 0x0:
- trace_output_len += snprintf(trace_output + trace_output_len, 256 - trace_output_len,
- "IE");
- break;
- case 0x1:
- trace_output_len += snprintf(trace_output + trace_output_len, 256 - trace_output_len,
- "ID");
- break;
- case 0x2:
- /* Instruction exectued - TRACEPKT might be valid, but belongs to another cycle */
- trace_output_len += snprintf(trace_output + trace_output_len, 256 - trace_output_len,
- "IN");
- break;
- case 0x3:
- /* WAIT cycle - TRACEPKT is valid, but belongs to another cycle */
- trace_output_len += snprintf(trace_output + trace_output_len, 256 - trace_output_len,
- "WT");
- break;
- case 0x4:
- /* following a branch two APO cycles are output on PIPESTAT[1:0]
- * but another BE/BD could overwrite the current branch,
- * or a trigger could cause the APO to be output on TRACEPKT[1:0]
- */
- if ((PIPESTAT(trace_data[i + 1]) == 0x4)
- || (PIPESTAT(trace_data[i + 1]) == 0x5))
- {
- /* another branch occured, we ignore this one */
- j = (j < i + 1) ? i + 1 : j;
- break;
- }
- else if (PIPESTAT(trace_data[i + 1]) == 0x6)
- {
- apo = TRACEPKT(trace_data[i + 1]) & 0x3;
- }
- else
- {
- apo = PIPESTAT(trace_data[i + 1]) & 0x3;
- }
-
- if ((PIPESTAT(trace_data[i + 2]) == 0x4)
- || (PIPESTAT(trace_data[i + 2]) == 0x5))
- {
- j = (j < i + 2) ? i + 1 : j;
- i = i + 1;
- break;
- }
- else if (PIPESTAT(trace_data[i + 2]) == 0x6)
- {
- apo |= (TRACEPKT(trace_data[i + 2]) & 0x3) << 2;
- }
- else
- {
- apo = (PIPESTAT(trace_data[i + 1]) & 0x3) << 2;
- }
-
- branch_reason = -1;
- k = 0;
- do
- {
- if ((j = etmv1_next_packet(arm7_9->etb->RAM_depth, trace_data, j, &port_half, apo, &packet)) != -1)
- {
- address &= ~(0x7f << (k * 7));
- address |= (packet & 0x7f) << (k * 7);
- }
- else
- {
- break;
- }
- k++;
- } while ((k < 5) && (packet & 0x80));
-
- if (addressbits_valid < ((k * 7 > 32) ? 32 : k * 7))
- addressbits_valid = (k * 7 > 32) ? 32 : k * 7;
-
- if (k == 5)
- {
- branch_reason = (packet & 0x7) >> 4;
- trace_output_len += snprintf(trace_output + trace_output_len, 256 - trace_output_len,
- "BE 0x%x (/%i) (%s)", address, addressbits_valid, etmv1_branch_reason_string[branch_reason]);
- }
- else
- {
- trace_output_len += snprintf(trace_output + trace_output_len, 256 - trace_output_len,
- "BE 0x%x (/%i)", address, addressbits_valid);
- }
-
- break;
- case 0x5:
- trace_output_len += snprintf(trace_output + trace_output_len, 256 - trace_output_len,
- "BD");
- break;
- case 0x6:
- /* We catch the trigger event before we get here */
- ERROR("TR pipestat should have been caught earlier");
- trace_output_len += snprintf(trace_output + trace_output_len, 256 - trace_output_len,
- "--");
- break;
- case 0x7:
- /* TRACE disabled - TRACEPKT = invalid */
- trace_output_len += snprintf(trace_output + trace_output_len, 256 - trace_output_len,
- "TD");
- break;
- }
-
- /* PIPESTAT other than WT (b011) and TD (b111) mean we executed an instruction */
- if ((PIPESTAT(trace_data[i]) & 0x3) != 0x3)
- {
- last_instruction = i;
- address += 4;
+ etm_ctx->trace_data[j].pipestat = trace_data[i] & 0x7;
+ etm_ctx->trace_data[j].packet = (trace_data[i] & 0x7fff8) >> 3;
+ etm_ctx->trace_data[j].tracesync = (trace_data[i] & 0x80000) >> 19;
+
+ j += 1;
}
+ }
+
+ free(trace_data);
+
+ return ERROR_OK;
+}
- /* The group of packets for a particular instruction cannot start on or before any
- * previous functional PIPESTAT (IE, IN, ID, BE, or BD)
- */
- if (j < last_instruction)
- {
- j = last_instruction + 1;
- }
+int etb_start_capture(etm_context_t *etm_ctx)
+{
+ etb_t *etb = etm_ctx->capture_driver_priv;
+ u32 etb_ctrl_value = 0x1;
- /* restore trigger PIPESTAT to ensure TRACEPKT is ignored */
- if (trigger == 1)
+ if ((etm_ctx->portmode & ETM_PORT_MODE_MASK) == ETM_PORT_DEMUXED)
+ {
+ if ((etm_ctx->portmode & ETM_PORT_WIDTH_MASK) == ETM_PORT_16BIT)
{
- trace_data[i] &= ~0x7;
- trace_data[i] |= 0x6;
+ DEBUG("ETB can't run in demultiplexed mode with a 16-bit port");
+ return ERROR_ETM_PORTMODE_NOT_SUPPORTED;
}
-
- command_print(cmd_ctx, "%s (raw: 0x%8.8x)", trace_output, trace_data[i]);
+ etb_ctrl_value |= 0x2;
}
+ if ((etm_ctx->portmode & ETM_PORT_MODE_MASK) == ETM_PORT_MUXED)
+ return ERROR_ETM_PORTMODE_NOT_SUPPORTED;
+
+ etb_write_reg(&etb->reg_cache->reg_list[ETB_TRIGGER_COUNTER], 0x600);
+ etb_write_reg(&etb->reg_cache->reg_list[ETB_RAM_WRITE_POINTER], 0x0);
+ etb_write_reg(&etb->reg_cache->reg_list[ETB_CTRL], etb_ctrl_value);
+ jtag_execute_queue();
+
+ /* we're starting a new trace, initialize capture status */
+ etm_ctx->capture_status = TRACE_RUNNING;
+
+ return ERROR_OK;
+}
+
+int etb_stop_capture(etm_context_t *etm_ctx)
+{
+ etb_t *etb = etm_ctx->capture_driver_priv;
+ reg_t *etb_ctrl_reg = &etb->reg_cache->reg_list[ETB_CTRL];
+
+ etb_write_reg(etb_ctrl_reg, 0x0);
+ jtag_execute_queue();
+
+ /* trace stopped, just clear running flag, but preserve others */
+ etm_ctx->capture_status &= ~TRACE_RUNNING;
+
return ERROR_OK;
}
+
+etm_capture_driver_t etb_capture_driver =
+{
+ .name = "etb",
+ .register_commands = etb_register_commands,
+ .init = etb_init,
+ .status = etb_status,
+ .start_capture = etb_start_capture,
+ .stop_capture = etb_stop_capture,
+ .read_trace = etb_read_trace,
+};
Code Review / openocd.git / blobdiff