Logging frontend STMESP Demultiplexer API

Data Structures
struct	log_frontend_stmesp_demux_log_header
	Logging message header. More...
union	log_frontend_stmesp_demux_header
	Union for writing raw data to the logging message header. More...
struct	log_frontend_stmesp_demux_packet_generic
	Generic STP demux packet. More...
struct	log_frontend_stmesp_demux_log
	Packet with logging message. More...
struct	log_frontend_stmesp_demux_trace_point
	Packet with trace point. More...
struct	log_frontend_stmesp_demux_hw_event
	Packet with HW event. More...
union	log_frontend_stmesp_demux_packet
	Union of all packet types. More...
struct	log_frontend_stmesp_demux_config
	Demultiplexer configuration. More...

Macros
#define	LOG_FRONTEND_STMESP_DEMUX_MAJOR_BITS   3
	Bits used to store major index.
#define	LOG_FRONTEND_STMESP_DEMUX_LEVEL_BITS   3
	Bits used to store severity level.
#define	LOG_FRONTEND_STMESP_DEMUX_TLENGTH_BITS   16
	Bits used to store total length.
#define	LOG_FRONTEND_STMESP_DEMUX_PLENGTH_BITS   10
	Bits used to store package length.
#define	LOG_FRONTEND_STMESP_DEMUX_MAJOR_MAX   BIT(LOG_FRONTEND_STMESP_DEMUX_MAJOR_BITS)
	Maximum number of supported majors.
#define	LOG_FRONTEND_STMESP_DEMUX_TYPE_LOG   0
	Log message type.
#define	LOG_FRONTEND_STMESP_DEMUX_TYPE_TRACE_POINT   1
	Trace point message type.
#define	LOG_FRONTEND_STMESP_DEMUX_TYPE_HW_EVENT   2
	HW event message type.

Functions
int	log_frontend_stmesp_demux_init (const struct log_frontend_stmesp_demux_config *config)
	Initialize the demultiplexer.
void	log_frontend_stmesp_demux_major (uint16_t id)
	Indicate major opcode in the STPv2 stream.
void	log_frontend_stmesp_demux_channel (uint16_t id)
	Indicate channel opcode in the STPv2 stream.
int	log_frontend_stmesp_demux_packet_start (uint32_t *data, uint64_t *ts)
	Indicate detected packet start (DMTS).
void	log_frontend_stmesp_demux_timestamp (uint64_t ts)
	Indicate timestamp.
void	log_frontend_stmesp_demux_data (uint8_t *data, size_t len)
	Indicate data.
void	log_frontend_stmesp_demux_packet_end (void)
	Indicate packet end (Flag).
uint32_t	log_frontend_stmesp_demux_get_dropped (void)
	Get number of dropped messages and reset the counter.
union log_frontend_stmesp_demux_packet	log_frontend_stmesp_demux_claim (void)
	Claim packet.
void	log_frontend_stmesp_demux_free (union log_frontend_stmesp_demux_packet packet)
	Free previously claimed packet.
bool	log_frontend_stmesp_demux_is_idle (void)
	Check if there are any started but not completed log messages.
void	log_frontend_stmesp_demux_reset (void)
	Close any opened messages and mark them as invalid.
int	log_frontend_stmesp_demux_max_utilization (void)
	Get maximum buffer utilization.

Detailed Description

Macro Definition Documentation

LOG_FRONTEND_STMESP_DEMUX_LEVEL_BITS

#define LOG_FRONTEND_STMESP_DEMUX_LEVEL_BITS   3

#include <zephyr/logging/log_frontend_stmesp_demux.h>

Bits used to store severity level.

LOG_FRONTEND_STMESP_DEMUX_MAJOR_BITS

#define LOG_FRONTEND_STMESP_DEMUX_MAJOR_BITS   3

#include <zephyr/logging/log_frontend_stmesp_demux.h>

Bits used to store major index.

LOG_FRONTEND_STMESP_DEMUX_MAJOR_MAX

#define LOG_FRONTEND_STMESP_DEMUX_MAJOR_MAX   BIT(LOG_FRONTEND_STMESP_DEMUX_MAJOR_BITS)

#include <zephyr/logging/log_frontend_stmesp_demux.h>

Maximum number of supported majors.

LOG_FRONTEND_STMESP_DEMUX_PLENGTH_BITS

#define LOG_FRONTEND_STMESP_DEMUX_PLENGTH_BITS   10

#include <zephyr/logging/log_frontend_stmesp_demux.h>

Bits used to store package length.

LOG_FRONTEND_STMESP_DEMUX_TLENGTH_BITS

#define LOG_FRONTEND_STMESP_DEMUX_TLENGTH_BITS   16

#include <zephyr/logging/log_frontend_stmesp_demux.h>

Bits used to store total length.

LOG_FRONTEND_STMESP_DEMUX_TYPE_HW_EVENT

#define LOG_FRONTEND_STMESP_DEMUX_TYPE_HW_EVENT   2

#include <zephyr/logging/log_frontend_stmesp_demux.h>

HW event message type.

LOG_FRONTEND_STMESP_DEMUX_TYPE_LOG

#define LOG_FRONTEND_STMESP_DEMUX_TYPE_LOG   0

#include <zephyr/logging/log_frontend_stmesp_demux.h>

Log message type.

LOG_FRONTEND_STMESP_DEMUX_TYPE_TRACE_POINT

#define LOG_FRONTEND_STMESP_DEMUX_TYPE_TRACE_POINT   1

#include <zephyr/logging/log_frontend_stmesp_demux.h>

Trace point message type.

Function Documentation

log_frontend_stmesp_demux_channel()

void log_frontend_stmesp_demux_channel

(

uint16_t

id

)

#include <zephyr/logging/log_frontend_stmesp_demux.h>

Indicate channel opcode in the STPv2 stream.

Parameters

id	Channel ID.

log_frontend_stmesp_demux_claim()

union log_frontend_stmesp_demux_packet log_frontend_stmesp_demux_claim

(

void

)

#include <zephyr/logging/log_frontend_stmesp_demux.h>

Claim packet.

Get pointer to the pending packet with logging message. Packet must be freed using log_frontend_stmesp_demux_free.

Returns

Pointer to the packet or NULL.

log_frontend_stmesp_demux_data()

void log_frontend_stmesp_demux_data	(	uint8_t *	data,
		size_t	len )

#include <zephyr/logging/log_frontend_stmesp_demux.h>

Indicate data.

Parameters

data	Data buffer.
len	Length.

log_frontend_stmesp_demux_free()

void log_frontend_stmesp_demux_free

(

union log_frontend_stmesp_demux_packet

packet

)

#include <zephyr/logging/log_frontend_stmesp_demux.h>

Free previously claimed packet.

See log_frontend_stmesp_demux_claim.

Parameters

packet

Packet.

log_frontend_stmesp_demux_get_dropped()

uint32_t log_frontend_stmesp_demux_get_dropped

(

void

)

#include <zephyr/logging/log_frontend_stmesp_demux.h>

Get number of dropped messages and reset the counter.

Message can be dropped if there is no room in the packet buffer.

Returns

Number of dropped messages.

log_frontend_stmesp_demux_init()

int log_frontend_stmesp_demux_init

(

const struct log_frontend_stmesp_demux_config *

config

)

#include <zephyr/logging/log_frontend_stmesp_demux.h>

Initialize the demultiplexer.

Parameters

config

Configuration.

Return values

0	on success.
-EINVAL	on invalid configuration.

log_frontend_stmesp_demux_is_idle()

bool log_frontend_stmesp_demux_is_idle

(

void

)

#include <zephyr/logging/log_frontend_stmesp_demux.h>

Check if there are any started but not completed log messages.

Return values

True	There is no pending started log message.
False	There is pending message.

log_frontend_stmesp_demux_major()

void log_frontend_stmesp_demux_major

(

uint16_t

id

)

#include <zephyr/logging/log_frontend_stmesp_demux.h>

Indicate major opcode in the STPv2 stream.

Parameters

id	Master ID.

log_frontend_stmesp_demux_max_utilization()

int log_frontend_stmesp_demux_max_utilization

(

void

)

#include <zephyr/logging/log_frontend_stmesp_demux.h>

Get maximum buffer utilization.

Return values

Non-negative	Maximum buffer utilization.
-ENOTSUP	Feature not enabled.

log_frontend_stmesp_demux_packet_end()

void log_frontend_stmesp_demux_packet_end

(

void

)

#include <zephyr/logging/log_frontend_stmesp_demux.h>

Indicate packet end (Flag).

log_frontend_stmesp_demux_packet_start()

int log_frontend_stmesp_demux_packet_start	(	uint32_t *	data,
		uint64_t *	ts )

#include <zephyr/logging/log_frontend_stmesp_demux.h>

Indicate detected packet start (DMTS).

Parameters

data	Data. Can be NULL which indicates trace point without data.
ts	Timestamp. Can be NULL.

log_frontend_stmesp_demux_reset()

void log_frontend_stmesp_demux_reset

(

void

)

#include <zephyr/logging/log_frontend_stmesp_demux.h>

Close any opened messages and mark them as invalid.

log_frontend_stmesp_demux_timestamp()

void log_frontend_stmesp_demux_timestamp

(

uint64_t

ts

)

#include <zephyr/logging/log_frontend_stmesp_demux.h>

Indicate timestamp.

Timestamp is separated from packet start because according to STM spec (3.2.2) it is possible that timestamp is assigned to a later packet.

Parameters

ts	Timestamp.