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ETM: start cleaning up ETM_CTRL bit handling 

Provide better comments for the ETM_CTRL bits; use the correct bit
for half/full clock mode; and define a few more of the bits available
from the earliest ETM versions.

The new bit defintions use ETM_CTRL_* names to match their register
(instead of ETM_PORT_* or ETMV1_*).  For clarity, and better matching
to docs, they are defined with bitshifting not pre-computed masks.

Stop abusing typdefs for ETM_CTRL values; such values are not limited
to the enumerated set of individual bit values.

Rename etm->portmode to etm->control ... and start morphing it into a
single generic shadow of ETM_CTRL.  Eventually etm->tracemode should
vanish, so we can just write etm->control to ETM_CTRL.

Restore an "if" that somehow got dropped.

Signed-off-by: David Brownell <dbrownell@users.sourceforge.net>
This commit is contained in:
David Brownell 2009-12-19 13:07:25 -08:00
parent 9abad965ab
commit e25819645e
3 changed files with 63 additions and 36 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

14
src/target/etb.c
View File

@ -579,9 +579,9 @@ static int etb_read_trace(struct etm_context *etm_ctx)
free(etm_ctx->trace_data);
}
if ((etm_ctx->portmode & ETM_PORT_WIDTH_MASK) == ETM_PORT_4BIT)
if ((etm_ctx->control & ETM_PORT_WIDTH_MASK) == ETM_PORT_4BIT)
etm_ctx->trace_depth = num_frames * 3;
else if ((etm_ctx->portmode & ETM_PORT_WIDTH_MASK) == ETM_PORT_8BIT)
else if ((etm_ctx->control & ETM_PORT_WIDTH_MASK) == ETM_PORT_8BIT)
etm_ctx->trace_depth = num_frames * 2;
else
etm_ctx->trace_depth = num_frames;
@ -590,7 +590,7 @@ static int etb_read_trace(struct etm_context *etm_ctx)
for (i = 0, j = 0; i < num_frames; i++)
{
if ((etm_ctx->portmode & ETM_PORT_WIDTH_MASK) == ETM_PORT_4BIT)
if ((etm_ctx->control & ETM_PORT_WIDTH_MASK) == ETM_PORT_4BIT)
{
/* trace word j */
etm_ctx->trace_data[j].pipestat = trace_data[i] & 0x7;
@ -636,7 +636,7 @@ static int etb_read_trace(struct etm_context *etm_ctx)
j += 3;
}
else if ((etm_ctx->portmode & ETM_PORT_WIDTH_MASK) == ETM_PORT_8BIT)
else if ((etm_ctx->control & ETM_PORT_WIDTH_MASK) == ETM_PORT_8BIT)
{
/* trace word j */
etm_ctx->trace_data[j].pipestat = trace_data[i] & 0x7;
@ -699,9 +699,9 @@ static int etb_start_capture(struct etm_context *etm_ctx)
uint32_t etb_ctrl_value = 0x1;
uint32_t trigger_count;
if ((etm_ctx->portmode & ETM_PORT_MODE_MASK) == ETM_PORT_DEMUXED)
if ((etm_ctx->control & ETM_PORT_MODE_MASK) == ETM_PORT_DEMUXED)
{
if ((etm_ctx->portmode & ETM_PORT_WIDTH_MASK) != ETM_PORT_8BIT)
if ((etm_ctx->control & ETM_PORT_WIDTH_MASK) != ETM_PORT_8BIT)
{
LOG_ERROR("ETB can't run in demultiplexed mode with a 4 or 16 bit port");
return ERROR_ETM_PORTMODE_NOT_SUPPORTED;
@ -709,7 +709,7 @@ static int etb_start_capture(struct etm_context *etm_ctx)
etb_ctrl_value |= 0x2;
}
if ((etm_ctx->portmode & ETM_PORT_MODE_MASK) == ETM_PORT_MUXED) {
if ((etm_ctx->control & ETM_PORT_MODE_MASK) == ETM_PORT_MUXED) {
LOG_ERROR("ETB: can't run in multiplexed mode");
return ERROR_ETM_PORTMODE_NOT_SUPPORTED;
}

28
src/target/etm.c
View File

@ -435,10 +435,10 @@ int etm_setup(struct target *target)
/* initialize some ETM control register settings */
etm_get_reg(etm_ctrl_reg);
etm_ctrl_value = buf_get_u32(etm_ctrl_reg->value, 0, etm_ctrl_reg->size);
etm_ctrl_value = buf_get_u32(etm_ctrl_reg->value, 0, 32);
/* clear the ETM powerdown bit (0) */
etm_ctrl_value &= ~0x1;
etm_ctrl_value &= ~ETM_CTRL_POWERDOWN;
/* configure port width (21,6:4), mode (13,17:16) and
* for older modules clocking (13)
@ -447,9 +447,9 @@ int etm_setup(struct target *target)
& ~ETM_PORT_WIDTH_MASK
& ~ETM_PORT_MODE_MASK
& ~ETM_PORT_CLOCK_MASK)
| etm_ctx->portmode;
| etm_ctx->control;
buf_set_u32(etm_ctrl_reg->value, 0, etm_ctrl_reg->size, etm_ctrl_value);
buf_set_u32(etm_ctrl_reg->value, 0, 32, etm_ctrl_value);
etm_store_reg(etm_ctrl_reg);
if ((retval = jtag_execute_queue()) != ERROR_OK)
@ -727,7 +727,8 @@ static int etmv1_next_packet(struct etm_context *ctx, uint8_t *packet, int apo)
continue;
}
if ((ctx->portmode & ETM_PORT_WIDTH_MASK) == ETM_PORT_16BIT)
/* FIXME there are more port widths than these... */
if ((ctx->control & ETM_PORT_WIDTH_MASK) == ETM_PORT_16BIT)
{
if (ctx->data_half == 0)
{
@ -741,7 +742,7 @@ static int etmv1_next_packet(struct etm_context *ctx, uint8_t *packet, int apo)
ctx->data_index++;
}
}
else if ((ctx->portmode & ETM_PORT_WIDTH_MASK) == ETM_PORT_8BIT)
else if ((ctx->control & ETM_PORT_WIDTH_MASK) == ETM_PORT_8BIT)
{
*packet = ctx->trace_data[ctx->data_index].packet & 0xff;
ctx->data_index++;
@ -1171,9 +1172,9 @@ static int etmv1_analyze_trace(struct etm_context *ctx, struct command_context *
}
static COMMAND_HELPER(handle_etm_tracemode_command_update,
etmv1_tracemode_t *mode)
uint32_t *mode)
{
etmv1_tracemode_t tracemode;
uint32_t tracemode;
/* what parts of data access are traced? */
if (strcmp(CMD_ARGV[0], "none") == 0)
@ -1218,6 +1219,7 @@ static COMMAND_HELPER(handle_etm_tracemode_command_update,
bool etmv1_branch_output;
COMMAND_PARSE_ENABLE(CMD_ARGV[3], etmv1_branch_output);
if (etmv1_branch_output)
tracemode |= ETMV1_BRANCH_OUTPUT;
/* IGNORED:
@ -1247,7 +1249,7 @@ COMMAND_HANDLER(handle_etm_tracemode_command)
return ERROR_FAIL;
}
etmv1_tracemode_t tracemode = etm->tracemode;
uint32_t tracemode = etm->tracemode;
switch (CMD_ARGC)
{
@ -1356,7 +1358,7 @@ COMMAND_HANDLER(handle_etm_config_command)
{
struct target *target;
struct arm *arm;
etm_portmode_t portmode = 0x0;
uint32_t portmode = 0x0;
struct etm_context *etm_ctx;
int i;
@ -1495,7 +1497,7 @@ COMMAND_HANDLER(handle_etm_config_command)
etm_ctx->target = target;
etm_ctx->trace_data = NULL;
etm_ctx->portmode = portmode;
etm_ctx->control = portmode;
etm_ctx->core_state = ARM_STATE_ARM;
arm->etm = etm_ctx;
@ -1822,7 +1824,7 @@ COMMAND_HANDLER(handle_etm_dump_command)
}
fileio_write_u32(&file, etm_ctx->capture_status);
fileio_write_u32(&file, etm_ctx->portmode);
fileio_write_u32(&file, etm_ctx->control);
fileio_write_u32(&file, etm_ctx->tracemode);
fileio_write_u32(&file, etm_ctx->trace_depth);
@ -1894,7 +1896,7 @@ COMMAND_HANDLER(handle_etm_load_command)
{
uint32_t tmp;
fileio_read_u32(&file, &tmp); etm_ctx->capture_status = tmp;
fileio_read_u32(&file, &tmp); etm_ctx->portmode = tmp;
fileio_read_u32(&file, &tmp); etm_ctx->control = tmp;
fileio_read_u32(&file, &tmp); etm_ctx->tracemode = tmp;
fileio_read_u32(&file, &etm_ctx->trace_depth);
}

57
src/target/etm.h
View File

@ -78,9 +78,20 @@ struct etm_reg
struct arm_jtag *jtag_info;
};
typedef enum
/* Subset of ETM_CTRL bit assignments. Many of these
* control the configuration of trace output, which
* hooks up either to ETB or to an external device.
*
* NOTE that these have evolved since the ~v1.3 defns ...
*/
enum
{
/* Port width */
ETM_CTRL_POWERDOWN = (1 << 0),
ETM_CTRL_MONITOR_CPRT = (1 << 1),
// bits 3:2 == trace type (ETMV1_TRACE_* << 2)
/* Port width (bits 21 and 6:4) */
ETM_PORT_4BIT = 0x00,
ETM_PORT_8BIT = 0x10,
ETM_PORT_16BIT = 0x20,
@ -91,18 +102,32 @@ typedef enum
ETM_PORT_1BIT = 0x00 | (1 << 21),
ETM_PORT_2BIT = 0x10 | (1 << 21),
ETM_PORT_WIDTH_MASK = 0x70 | (1 << 21),
/* Port modes */
ETM_PORT_NORMAL = 0x00000,
ETM_PORT_MUXED = 0x10000,
ETM_PORT_DEMUXED = 0x20000,
ETM_PORT_MODE_MASK = 0x30000,
/* Clocking modes */
ETM_PORT_FULL_CLOCK = 0x0000,
ETM_PORT_HALF_CLOCK = 0x1000,
ETM_PORT_CLOCK_MASK = 0x1000,
} etm_portmode_t;
typedef enum
ETM_CTRL_FIFOFULL_STALL = (1 << 7),
ETM_CTRL_BRANCH_OUTPUT = (1 << 8),
ETM_CTRL_DBGRQ = (1 << 9),
ETM_CTRL_ETM_PROG = (1 << 10),
ETM_CTRL_ETMEN = (1 << 11),
ETM_CTRL_CYCLE_ACCURATE = (1 << 12),
/* Clocking modes -- up to v2.1, bit 13 */
ETM_PORT_FULL_CLOCK = (0 << 13),
ETM_PORT_HALF_CLOCK = (1 << 13),
ETM_PORT_CLOCK_MASK = (1 << 13),
// bits 15:14 == context ID size used in tracing
// ETMV1_CONTEXTID_* << 8
/* Port modes -- bits 17:16, tied to clocking mode */
ETM_PORT_NORMAL = (0 << 16),
ETM_PORT_MUXED = (1 << 16),
ETM_PORT_DEMUXED = (2 << 16),
ETM_PORT_MODE_MASK = (3 << 16),
// bits 31:18 defined in v3.0 and later (e.g. ARM11+)
};
enum
{
/* Data trace */
ETMV1_TRACE_NONE = 0x00,
@ -118,7 +143,7 @@ typedef enum
/* Misc */
ETMV1_CYCLE_ACCURATE = 0x100,
ETMV1_BRANCH_OUTPUT = 0x200
} etmv1_tracemode_t;
};
/* forward-declare ETM context */
struct etm_context;
@ -161,8 +186,8 @@ struct etm_context
trace_status_t capture_status; /* current state of capture run */
struct etmv1_trace_data *trace_data; /* trace data */
uint32_t trace_depth; /* number of cycles to be analyzed, 0 if no data available */
etm_portmode_t portmode; /* normal, multiplexed or demultiplexed */
etmv1_tracemode_t tracemode; /* type of info trace contains */
uint32_t control; /* shadow of ETM_CTRL */
uint32_t tracemode; /* type of info trace contains */
int /*arm_state*/ core_state; /* current core state */
struct image *image; /* source for target opcodes */
uint32_t pipe_index; /* current trace cycle */